85,024 results on '"Böhm"'
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2. Maya records of planetary conjunctions in Dresden Codex
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Vondrák J., Böhm V., and Böhm B.
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ephemerides ,history and philosophy of astronomy ,Astronomy ,QB1-991 - Abstract
Old Mayas designed a very complicated calendar, and they also recorded important historical events and astronomical phenomena. Dresden Codex (DC), one of the four preserved Mayan hieroglyphic literal legacies, contains many of these, covering the classical period of Maya history. The records of these events in DC are given in the so-called Long Count (LC), the number of days elapsed from the origin of Maya chronology. The difference between LC and Julian Date, used in today's astronomy, is traditionally called correlation. More than fifty different values of the correlation have been published so far, and the differences among them can reach up to several centuries. The value, mostly accepted by Maya historians, is the one by Goodman-Martíez-Thompson (GMT), equal to 584 283 days. It is based mostly on events extracted from sources of the post-classical period of Maya history. Brothers Böhm used Maya astronomical records to derive the Böhm correlation (BB) of 622 261 days. It is in excellent agreement with the dates of astronomical phenomena recorded in DC. During past decades we published several papers supporting validity of the BB correlation. They are based on the records of different astronomical phenomena in DC and stelae, such as solar eclipses, planetary conjunctions, greatest elongations of Mercury and Venus from the Sun, or heliacal risings and settings. The present study is devoted to newly found recorded dates on page D74 of Dresden Codex. We were able to identify six of them with conjunctions of planets Venus through Saturn (corresponding to years 491, 495, 496, 501, 531, and 571), when BB correlation was applied.
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- 2024
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3. The divided town of Český Těšín/Cieszyn as the most integrated part of the Czech-Polish borderland: A life in the cross-border educational togetherness or side by side?
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Böhm Hynek, Boháč Artur, Nowak-Żółty Edyta, and Szafrańska Anna
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cross-border integration ,schools ,těšín/cieszyn ,barriers ,functional integration ,poland ,czech republic ,Geography (General) ,G1-922 - Abstract
The (non)contribution of schools towards cross-border integration in the divided town of Těšín/Cieszyn, located on the Czech-Polish border, is analysed in this article. The pandemic-related border closures revealed a substantial level of togetherness in this town, manifested by various social activities. Moreover, a part of these (during the pandemic restricted) cross-border social practices were those in education. We applied a mix of quantitative and qualitative methods to diagnose the directions of cross-border educational flows, the approach of schools towards the identified joint cross-border social practices, and the possible level of togetherness. As a result, one-sidedness (Polish pupils attending schools in the Czech Republic) of cross-border flows was identified – which also follows the direction of a cross-border workforce. Except for the schools with Polish as the instruction language, located in the Czech part of the town, primarily serving Polish speakers living in the Czech Republic, we can mention hardly any mutually shared feeling of togetherness and an actual place-based approach towards educational governance in this divided town. We observe some ties in education between the autochthonous Polish minority in the Czech Republic and the Poles in Poland, without the involvement of pupils or teachers of Czech ethnicity, who do not reflect opportunities behind the border.
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- 2023
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4. The Turów coal mine international dispute as a determinant of the cross-border integration of inhabitants of the Polish-Czech border
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Wróblewski Łukasz, Boháč Artur, and Böhm Hynek
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turów coal mine ,international dispute ,cross-border integration ,polish-czech border ,euroregion neisse-nisa-nysa ,Geography (General) ,G1-922 - Abstract
The crisis around the operation of the Turów coal mine and its impact on cross-border relations in the Polish-Czech borderlands is examined in this article. The genesis of the international dispute and its course is analysed on the basis of international relations and border studies theories. Moreover, the specific cross-border relations and asymmetries in the area are studied. Then, the authors discuss the methodology and results of the research through questionnaires and formulate conclusions drawn from the research conducted by the Polish-Czech research team in 2022. The results prove that the nearly two-year Polish-Czech dispute over the Turów mine hurt the cross-border activity of the inhabitants of the Polish-Czech border. Despite alarming media news, this impact was weak and short-lived. It ultimately did not significantly impact the cross-border integration of the inhabitants or cause a deterioration of relations between the Polish and Czech sides of the Euroregion Neisse-Nisa-Nysa. The crisis was caused by the lack of adequate communication between local governments from Poland and the Czech Republic and insufficient commitment from the local and regional authorities. Another cause was the poor integration of residents in the border area, although the cross-border cooperation epitomised by the Euroregion Neisse-Nisa-Nysa is not poorly rated.
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- 2023
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5. Newly found Mayan records of astronomical phenomena in Dresden Codex
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Vondrák J., Böhm V., and Böhm B.
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ephemerides ,planets and satellites: individual: mercury ,venus ,mars ,jupiter ,saturn ,history and philosophy of astronomy ,Astronomy ,QB1-991 - Abstract
The rich culture of old Maya gave birth to a very complicated and complex calendar; they also recorded important historical events and many significant astronomical phenomena. The main source of information is represented by Dresden Codex (DC), one of the four preserved Mayan hieroglyphic literal legacies. DC roughly covers the interval between 280 and 1325 AD. The old problem of precise Mayan dating with respect to our calendar is traditionally called correlation; it expresses the difference in days between the Long Count of the Mayan calendar and the Julian Date, used in presentday astronomy. There exist more than fifty published correlations that differ one from the other by as much as several centuries. Historians mostly accept the so called Goodman-Martínez-Thompson (GMT) value of 584 283 days, which is based mostly on historical events extracted from the sources of a postclassical period of Mayan history. On the contrary, brothers Böhm used precisely dated astronomical data from classical period to derive the Böhm correlation (BB) of 622 261 days. Unlike the GMT correlation it is in excellent agreement with the astronomical phenomena recorded in DC. Since then we published several papers supporting the validity of BB correlation and its advantage over GMT in the classical period of Mayan history. To this end, we used more records of astronomical phenomena discovered in DC. This study describes six records of planetary conjunctions that we found recently on p. 37 of DC that concern planets Mercury, Venus, Mars, Jupiter, and Saturn. All of these records coincide with the real occurrences of these phenomena within several days, if BB correlation is applied.
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- 2023
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6. Chronic renal failure as predictive factor for acute elevation of systolic blood pressure after fluorescein angiography in patients with retinal diseases
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Alaa Din Abdin, Marie Hammerschmidt, Amine Maamri, Cristian Munteanu, Haring Bernhard, Böhm Michael, Berthold Seitz, and Amr Abdin
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Fluorescein angiography ,Blood pressure ,Side effects ,Chronic renal failure ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Purpose: To investigate the influence of fluorescein angiography (FA) on blood pressure (BP) in patients with retinal diseases, and analyze the predictive factors for acute elevation of systolic BP after FA. Design: and Methods: A prospective study was conducted with 636 patients undergoing FA between April 2021 and October 2021. BP and pulse were measured in each patient before and 20 min after FA. The baseline characteristics of patients who developed an acute elevation in systolic BP (>10 mmHg) were compared with those of the remaining patients to detect factors that may predict this acute elevation. Results: Overall, mean systolic BP changed from 142 ± 17 mmHg to 140 ± 20 mmHg after 20 min (p = 0.1). Mean diastolic BP changed from 79 ± 15 mmHg to 78 ± 13 mmHg after 20 min (p = 0.45). Mean pulse rate changed from 73 ± 14 bpm to 70 ± 12 bpm after 20 min (p = 0.001). 103 patients (16 %) had acute elevation of systolic BP (>10 mmHg). Mean systolic BP changed from 143 ± 17 mmHg to 162 ± 19 mmHg after 20 min in this group (p = 0.001). Patients in this group were significantly older compared to the rest (73 ± 12 vs 67 ± 15, p = 0.001). The rate of chronic renal failure was significantly higher in this group compared to the rest of the patients (42/7.8 % vs 15/14.6 %, p = 0.01). Conclusions: This study demonstrated that fluorescein angiography is a relatively safe procedure with regards to blood pressure changes. However, chronic renal failure could be considered as predictive factor for acute elevation of systolic blood pressure after this procedure.
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- 2023
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7. Evaluation einer Professionalisierungsmaßnahme für inklusiven Englischunterricht
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Böhm, Katharina
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Lehrerbildung ,Teacher education ,Lehrerprofessionalisierung ,teacher professionalization ,Lehrkompetenz ,teaching competence ,universal design for learning ,heterogeneity ,Heterogenität ,inclusive subject teaching ,inklusiver Fachunterricht ,Englischunterricht ,English language teaching ,lesson planning ,Unterrichtsplanung ,Selbstwirksamkeit ,self-efficacy ,practicum ,Praxissemester ,inclusion ,Lehrkräftebildung ,English as a foreign language ,Inklusion ,Englisch als Fremdsprache ,bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy::JNFN Inclusive education / mainstreaming - Abstract
How can teacher training students be prepared better for their profession? This explorative study deals with the development and evaluation of a university-based professionalization measure in the context of the internship semester. The aim is to qualify prospective teachers successively for the planning and implementation of inclusive teaching in the subject English against the background of the Universal Design for Learning (UDL) and a planning guide. Among other findings, a significant increase in students' self-efficacy expectations related to inclusive instructional design was observed. The study makes a first contribution to researching the potential of inclusion-oriented professionalization measures against the background of the UDL in the school subject English., Wie können Lehramtsstudierende besser auf ihren Beruf vorbereitet werden? Die explorative Studie befasst sich mit der Entwicklung und Evaluation einer universitären Professionalisierungsmaßnahme im Rahmen des Praxissemesters. Ziel ist es, angehende Lehrkräfte sukzessiv für die Planung und Durchführung von inklusivem Unterricht im Fach Englisch vor dem Hintergrund des Universal Design for Learning (UDL) und eines Planungsleitfadens zu qualifizieren. U.a. zeigt sich eine signifikante Steigerung der studentischen Selbstwirksamkeitserwartungen bezogen auf inklusive Unterrichtsgestaltung. Die Studie leistet einen ersten Beitrag zur Erforschung des Potenzials von inklusionsorientierten Professionalisierungsmaßnahmen vor dem Hintergrund des UDL im Fach Englisch.
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- 2023
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8. Performance Study of a Developed Rule-Based Control Strategy with Use of an ECMS Optimization Control Algorithm on a Plug-In Hybrid Electric Vehicle
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Ušiak Michal, Böhm Michael, and Šebela Kamil
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hybrid electric vehicle ,energy management ,ecms ,optimization control strategy ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Greenhouse gases jeopardize world’s climate. A significant amount of these pollutants is produced by road vehicles, so their producers are forced to reduce their emissions significantly. This means that every car manufacturer is expanding their electrified vehicle range. Fully electric vehicles are the best way for long-term elimination of greenhouse gases production in road transport. However, in the short term it is not possible to switch all vehicles to EVs. Temporary solutions are hybrid electric vehicles, which offer a compromise between conventional and electric vehicles. In addition to the right choice of hybrid powertrain and correct scaling of its components, it is also important to develop a suitable control strategy for its energy management. The main goal of this work is to compare the performance of the rule-based control strategy with the built-in local optimization algorithm ECMS in GT-SUITETM software. ECMS means Equivalent Consumption Minimization Strategy and is based on an optimization of selected control parameters in each time step of the driving cycle simulation. A fuel efficiency improvement is assessed on a selected plug-in hybrid vehicle. Results of WLTC driving cycle simulations in charge sustaining mode (state of charge of the battery at the beginning and at the end of the simulation is the same) shows fuel consumption of 5 l/100km for rule based control strategy and 4.2 l/100km for ECMS algorithm. This means that ECMS can achieve more than 16% improvement for this particular vehicle.
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- 2022
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9. PERSONAL LOGO FOR A CREATION FIRM OR ATELIER
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PORUMB Camelia Luminița, DOBLE Liliana, and BÖHM Gabriella
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logo ,personal computer ,art ,design ,marketing ,conception ,Manufactures ,TS1-2301 - Abstract
The logo is a graphic element that can take the form of a letter, text, image, or even combinations of all these elements. It is used to identify a brand, product, organization or event. Any business, regardless of its size, must have a logo to define it. Nowadays, communication has become dominated by its visual composition. The world in which the rhythm is increasingly accelerated, communication strategies must emphasize what is possible to transmit instantly, with minimal effort, to the person who is looking. Starting from this premise, in this paper, we will present why it is good to create your own logo and what are the aspects to be taken into account when doing so. Well, our goal is to find a logo that has positive connotations for the business we want to promote. In this paper, a list of quality logo services and tips has been created to help people while creating an original logo for a business. Finally, we have written an idea on how to start creating a logo for a business that provides credibility in interacting with potential customers. We need a professional logo, colorful, versatile, that has positive visual impact, but at the same time it is affordable, and can be purchased by any small creative workshop.
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- 2022
10. Determination of accident scenarios via freely available accident databases
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Bauder Maximilian, Lecheler Katrin, Wech Lothar, Böhm Klaus, Paula Daniel, and Schweiger Hans-Georg
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accident databases ,accident scenarios ,vehicle-to-vehicle accidents ,pre-crash-matrix ,crash investigation sampling system ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The derivation of real accident scenarios from accident databases represents an important task within vehicle safety research. Simulations are increasingly used for this purpose. Depending on the research interest, a wide range of accident databases exists worldwide, which differ mainly in the number of recorded data per accident and availability. This work aims to identify critical vehicle-to-vehicle accidents based on freely available accident databases to derive concrete scenarios for a subsequent simulation. For this purpose, the method of the pre-crash matrix is applied using the example of the freely available Crash Investigation Sampling System database of the National Highway Traffic Safety Administration. An analysis of existing databases worldwide shows that this is the most detailed, freely available database. The derivation of scenarios succeeds here by a new method, whereby a center of gravity calculation is carried out based on the damages of the vehicles according to Collision Deformation Classification nomenclature. In addition, the determination of other necessary parameters, as well as the limits of the database, is shown in order to derive a scenario that can be simulated. As a result, the constellations of the five most frequent vehicle-to-vehicle accident scenarios according to the Crash Investigation Sampling System database are presented. In particular, other institutions should follow National Highway Traffic Safety Administration’s example and make data freely available for accident research.
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- 2022
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11. Robotic assistant systems for surgical procedures of the anterior skull base
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Schuler Patrick J., Böhm Felix, Greve Jens, Scheithauer Marc, and Hoffmann Thomas K.
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robot-assisted surgery ,anterior skull base ,tors ,assistant ,Medicine - Abstract
Robot-assisted surgery (RAS) has been widely accepted in the clinical routine around the world with a focus on urology, gynecology and general surgery. Even transoral robotic surgery (TORS) is applied on a regular basis in some specialized medical centers. However, the anatomical constraints and the delicate procedures at the anterior skull base prevent the introduction of RAS until today. We have performed an extended literature research on robot-assisted skull base surgery and added our own pre-clinical experiences to the list of publications. The overview includes available systems, pre-clinical and clinical applications, specific limitations, remaining challenges and an outlook into future developments.
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- 2022
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12. Did old Maya observe Mercury?
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Vondrák J., Böhm V., and Böhm B.
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ephemerides ,planets and satellites: individual: mercury ,history and philosophy of astronomy ,time ,Astronomy ,QB1-991 - Abstract
It is well known that the rich culture of old Maya contained, among other, also a very complicated and complex calendar, in which they recorded not only historical events, but also significant astronomical phenomena. Main source of information is the Dresden Codex, roughly covering the interval between 280 and 1325 AD. The problem of the so-called correlation between Mayan and our calendars (expressing the difference between Long Count of Mayan calendar and Julian date) is very old, there exist about fifty different solutions that mutually differ by up to hundreds of years. Out of these, historians mostly accept the so-called Goodman - Martínez - Thompson (GMT) value of 584 283 days, which is based almost entirely on historical events. On the contrary, we stressed very precisely dated astronomical data, demonstrated the contradictions of GMT with them, and derived the so-called Böhm correlation (BB) of 622 261 days, which is in excellent agreement with astronomical phenomena recorded in Dresden Codex. Maya researchers are mostly convinced that Maya did not pay much attention to Mercury. Here we conclude that the truth is opposite; we analyze the data in Dresden Codex and find many records corresponding to visibility of Mercury near its maximum elongations from the Sun, and also to their conjunctions.
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- 2022
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13. Eco-efficient manufacturing: Transforming end-of-life wind turbine blade components into floats for PV-floating systems
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Johst Philipp, Seibert Dimitrij, Zschiebsch Willi, Kucher Michael, Carneiro Carlos, Araújo Andreia, Santos Raquel Miriam, Rodriguez-Ortiz Leandro A., Alexandra Tapia Estefania, and Böhm Robert
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end-of-life wind turbine blades ,circular economy ,reuse ,repurpose ,composite materials manufacturing ,photovoltaic floating systems ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
This study explores the innovative reuse of end-of-life (EoL) wind turbine blade (WTBs) parts as floats for photovoltaic (PV)-floating systems. In response to the growing concerns about EoL WTB waste, this study applies circular economy principles to repurpose high-value composite materials. By transforming a segment of an Enercon E40 WTB into a float for a PV-floating system, this study not only provides a sustainable solution to EoL composites, but also contributes to the development of renewable energy. The article describes the design of the PV-floating system and the lessons learned from its construction. It also provides an outlook on how such a system can be further scaled up.
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- 2024
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14. Inflammatory mechanism in Diabetes – Ultrastructural investigations of endocrine pancreas using correlative electron microscopy (STEM)
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Kolb Dagmar, Böhm Sumayya, Hingerl Kerstin, Pieber Thomas, Ehall Barbara, Pernitsch Dominique, and Bogensperger DI Lea
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scanning transmission electron microscopy ,diabetes ,Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Published
- 2024
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15. Managing Cross-Border Projects Towards More Resilient Cooperation in Borderlands. The Post-Pandemic Perspective
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Kurowska-Pysz, Joanna, Medeiros, Eduardo, and Böhm, Hynek
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Business & Economics ,Social Science ,Political Science ,bic Book Industry Communication::K Economics, finance, business & management::KJ Business & management ,bic Book Industry Communication::J Society & social sciences::JF Society & culture: general ,bic Book Industry Communication::J Society & social sciences::JP Politics & government - Abstract
The authors of this monograph were driven to delve into the challenges facing cross-border cooperation amidst crises and disruptions spurred by the adverse impacts witnessed during the COVID-19 pandemic. This included challenges to the implementation of cross-border projects, the activities of Euroregions, and the development of partnerships based on INTERREG programs, as well as other issues related to territorial cooperation.The confluence of the pandemic crisis and broader international geopolitical issues, such as illegal migration to the EU and geopolitical tensions like Russian aggression against Ukraine, underscores the imperative to explore new research avenues focused on bolstering the resilience of cross-border cooperation within the EU.With a focus on identifying key factors shaping the management of cross-border projects co-financed by INTERREG programs, as well as factors influencing partner cooperation, this study aims to fortify cross-border cooperation in the face of future crises and disruptions.The monograph offers valuable insights for institutions and organizations operating in border regions, catering specifically to theoreticians and practitioners engaged in cross-border cooperation. By distilling lessons learned from the COVID-19 pandemic period, it provides a roadmap for integrating resilience into future cross-border activities and endeavours.
- Published
- 2024
16. Effects of Single Pill Combinations Compared to Identical Multi Pill Therapy on Outcomes in Hypertension, Dyslipidemia and Secondary Cardiovascular Prevention: The START-Study
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Wilke T, Weisser B, Predel HG, Schmieder R, Wassmann S, Gillessen A, Blettenberg J, Maywald U, Randerath O, Mueller S, and Böhm M
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single pill ,adherence ,cardiovascular outcomes ,mortality ,prognosis ,clinical practice ,Internal medicine ,RC31-1245 - Abstract
Thomas Wilke,1 Burkhard Weisser,2 Hans-Georg Predel,3 Roland Schmieder,4 Sven Wassmann,5 Anton Gillessen,6 Jörg Blettenberg,7 Ulf Maywald,8 Olaf Randerath,9 Sabrina Mueller,10 Michael Böhm11 1Institut für Pharmakoökonomie und Arzneimittellogistik (IPAM)/Institute for Pharmacoeconomics and Pharmaceutical Logistics, Wismar, Germany; 2Institute of Sports Science, Christian-Albrechts-University of Kiel, Kiel, Germany; 3Institute of Cardiology and Sports Medicine, German Sport University, Cologne, Germany; 4Department of Nephrology and Hypertension, University Hospital Erlangen, Friedrich Alexander University Erlangen Nürnberg, Erlangen, Germany; 5Faculty of Medicine, Cardiology Pasing, Munich and University of the Saarland, Homburg/Saar, Germany; 6Department of Internal Medicine, Herz-Jesu-Hospital, Münster, Germany; 7Practice Dr. J. Blettenberg, Lindlar, Germany; 8AOK PLUS – The Health Insurance for Sachsen und Thüringen; GB Medicines/Remedies, Dresden, Germany; 9Medical Department, APONTIS PHARMA GmbH & Co.KG, Monheim, Germany; 10Ingress-Health HWM GmbH, Wismar, Germany; 11Clinic for Internal Medicine III, University Clinic of Saarland, Saarland University, Homburg/Saar, GermanyCorrespondence: Thomas Wilke, Institute of Pharmacoeconomics and Medication Logistics, University of Wismar, Alter Holzhafen 19, Wismar, 23966, Germany, Tel +4938417581014, Fax +4938417581011, Email Thomas.wilke@ipam-wismar.deAim: Current guidelines for the treatment of arterial hypertension (AH) or cardiovascular (CV) prevention recommend combination drug treatments with single pill combinations (SPC) to improve adherence to treatment. We aimed to assess whether the SPC concept is clinically superior to multi pill combination (MPC) with identical drugs.Methods and Results: In an explorative study, we analyzed anonymized claims data sets of patients treated with CV drugs for hypertension and/or CV disorders who were insured by the German AOK PLUS statutory health fund covering 01/07/2012-30/06/2018. Patients at age ≥ 18 years who received either a SPC or MPC with identical drugs were followed for up to one year. A one to one propensity score matching (PSM) was applied within patient groups who started identical drug combinations, and results were reported as incidence rate ratios (IRRs) as well as hazard ratios (HRs). After PSM, data from 59,336 patients were analyzed. In 30 out of 56 IRR analyses, superiority of SPC over MPC was shown. In 5 out of 7 comparisons, the HR for the composite outcome of all-cause death and all-cause hospitalizations was in favor of the SPC regimen (SPC versus MPC): valsartan/amlodipine: HR=0.87 (95% CI: 0.84– 0.91, p ≤ 0.001); candesartan/amlodipine: 0.77 (95% CI: 0.65– 0.90, p = 0.001); valsartan/amlodipine/hydrochlorothiazide: HR=0.68 (95% CI: 0.61– 0.74, p ≤ 0.001); ramipril/amlodipine: HR=0.80 (95% CI: 0.77– 0.83, p ≤ 0.001); acetylsalicylic acid (ASA)/atorvastatin/ramipril: HR=0.64 (95% CI: 0.47– 0.88, p = 0.005).Conclusion: SPC regimens are associated with a lower incidence of CV events and lower all-cause mortality in clinical practice. SPC regimens should generally be preferred to improve patient’s prognosis.Keywords: single pill, adherence, cardiovascular outcomes, mortality, prognosis, clinical practice
- Published
- 2022
17. Einfluss des Gemengeanbaus verschiedener Körnerleguminosen auf die photosynthetisch-aktive Strahlung (PAR) im Bestand und die Unkrautunterdrückung unter Bedingungen des ökologischen Landbaus
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Rinke, Nadja and Böhm, Herwart
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intercropping ,legumes ,nitrogen content ,photosynthetically active radiation ,Agriculture ,Botany ,QK1-989 - Abstract
Körnerleguminosen sind wichtige Elemente des ökologischen Landbaus. Das Erntegut ist reich an Protein und kann als betriebseigenes Futtermittel für die Tierfütterung genutzt werden. Körnerleguminosen diversifizieren die Fruchtfolgen, unterbrechen Lebenszyklen von Getreidekrankheiten und haben die Fähigkeit, Luftstickstoff zu fixieren. Die oft geringeren Erträge und die langsame Jugendentwicklung, welche das Risiko für Frühverunkrautung erhöht, können durch den Gemengeanbau von Körnerleguminosen mit Sommergetreide kompensiert werden. Ein Feldversuch wurde am Thünen-Institut für Ökologischen Landbau in Trenthorst (Norddeutschland) durchgeführt, um die Leistung von Körnerleguminosen-Gemengen und -Reinsaaten zu vergleichen. Die Parzellen wurden in einem randomisierten Blockdesign mit vier Wiederholungen angelegt. Für die Kulturen Ackerbohne, Futtererbse, Blaue und Weiße Lupine wurden je zwei Sorten mit unterschiedlichen Eigenschaften getestet. Während der Vegetationsperiode wurde die photosynthetisch aktive Strahlung (PAR) unter dem Bestand auf der Höhe der Unkräuter zu acht Zeitpunkten gemessen. Parallel wurde die Globalstrahlung gemessen, um die Strahlung zu ermitteln, die durch den Bestand dringt. Zur Abreife der Kulturen wurde eine Handernte auf einem Quadratmeter durchgeführt, um die Unkrautbiomasse zu ermitteln. Die Biomasse wurde bis zur Gewichtsbalance getrocknet und der Stickstoffgehalt analysiert. Die Ergebnisse zeigen eine Reduktion der Strahlung in den Körnerleguminosen-Gemengen in der kritischen Phase der Jugendentwicklung im Vergleich zu den jeweiligen Reinsaaten. Die Bestockung des Getreides führte zu einer schnellen Beschattung des Bodens und einem starken Rückgang der Strahlung im Bestand in der Sommerweizen-Reinsaat. Im Gemenge profitierten die Körnerleguminosen von dieser schnellen Beschattung, besonders die Gemenge der Kulturen Ackerbohne während des Längenwachstums und Futtererbse ab der Blüte. Lupinen zeigen ein ausgeprägtes Rosettenwachstum, welches zur effektiven Beschattung des Bodens führt, sodass der Effekt des Gemengeanbaus marginal war. Zur Hülsenbildung zeigte der Gemengeanbau von Weißen Lupinen sogar einen gegenteiligen Effekt. Die geringere Anzahl von Weißen Lupinen pro Quadratmeter führte zu einer geringeren Beschattung als in den Reinsaaten. Bei den Körnerleguminosen war kein Sorteneffekt auf die Beschattung, mit Ausnahme der Futtererbse, erkennbar. Die langstrohige Futtererbsensorte Muza beschattete den Boden ab dem Stadium der Hülsenbildung besser als die kurzstrohige Sorte Astronaute. Der Gemengeanbau reduzierte die Unkrautbiomasse im Vergleich zur jeweiligen Reinsaat. Für beide Lupinenarten war die Reduktion der Unkrautbiomasse signifikant, so konnte durch den Gemengeanbau eine Reduktion von 53,5 % erreicht werden. In den Reinsaaten war die Stickstoffaufnahme der Unkräuter höher als in den dazugehörigen Gemengen. Hieraus kann gefolgert werden, dass das Getreide im Gemenge den pflanzenverfügbaren Stickstoff im Boden reduziert, sodass dieser nicht mehr für die Unkräuter zu Verfügung steht. Dieser Effekt war für die Unkrautbiomasse in Parzellen der Ackerbohne, Schmalblättrigen und Weißen Lupine signifikant, jedoch nicht für die Futtererbse. Das Jahr 2018 war geprägt von sehr warmem und trockenem Wetter, wodurch die Versuchsergebnisse beeinflusst wurden. Die Auswertung der folgenden Jahre wird zeigen, ob die vorliegenden Ergebnisse bestätigt werden.
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- 2022
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18. CAMEO: Autocorrelation-Preserving Line Simplification for Lossy Time Series Compression
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Muñiz-Cuza, Carlos Enrique, Boehm, Matthias, and Pedersen, Torben Bach
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Computer Science - Databases ,Computer Science - Information Retrieval ,Computer Science - Information Theory ,E.2 ,H.3.2 ,H.2.8 - Abstract
Time series data from a variety of sensors and IoT devices need effective compression to reduce storage and I/O bandwidth requirements. While most time series databases and systems rely on lossless compression, lossy techniques offer even greater space-saving with a small loss in precision. However, the unknown impact on downstream analytics applications requires a semi-manual trial-and-error exploration. We initiate work on lossy compression that provides guarantees on complex statistical features (which are strongly correlated with the accuracy of the downstream analytics). Specifically, we propose a new lossy compression method that provides guarantees on the autocorrelation and partial-autocorrelation functions (ACF/PACF) of a time series. Our method leverages line simplification techniques as well as incremental maintenance of aggregates, blocking, and parallelization strategies for effective and efficient compression. The results show that our method improves compression ratios by 2x on average and up to 54x on selected datasets, compared to previous lossy and lossless compression methods. Moreover, we maintain -- and sometimes even improve -- the forecasting accuracy by preserving the autocorrelation properties of the time series. Our framework is extensible to multivariate time series and other statistical features of the time series., Comment: 14 pages, 13 figures
- Published
- 2025
19. Effect of interface on magnetic exchange coupling in Co/Ru/Co trilayer: from ab-initio simulations to micromagnetics
- Author
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Arapan, Sergiu, Priessnitz, Jan, Kovacs, Alexander, Oezelt, Harald, Böhm, David, Gusenbauer, Markus, Schrefl, Thomas, and Legut, Dominik
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Condensed Matter - Materials Science - Abstract
Interfaces play a substantial role for the functional properties of structured magnetic materials and magnetic multilayers. Modeling the functional behavior of magnetic materials requires the treatment of the relevant phenomena at the device level. Properties predicted from the electronic structure and spin dynamics at the atomistic level have to be properly transferred into a continuum level treatment. In this work we show how Co/Ru/Co three layers can be simulated with the continuum theory of micromagnetism, with interface coupling energies and bulk intrinsic properties properly derived from the results of \emph{ab initio} and spin dynamics simulations at different temperatures.
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- 2025
20. Roadmap on Neuromorphic Photonics
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Brunner, Daniel, Shastri, Bhavin J., Qadasi, Mohammed A. Al, Ballani, H., Barbay, Sylvain, Biasi, Stefano, Bienstman, Peter, Bilodeau, Simon, Bogaerts, Wim, Böhm, Fabian, Brennan, G., Buckley, Sonia, Cai, Xinlun, Strinati, Marcello Calvanese, Canakci, B., Charbonnier, Benoit, Chemnitz, Mario, Chen, Yitong, Cheung, Stanley, Chiles, Jeff, Choi, Suyeon, Christodoulides, Demetrios N., Chrostowski, Lukas, Chu, J., Clegg, J. H., Cletheroe, D., Conti, Claudio, Dai, Qionghai, Di Lauro, Luigi, Diamantopoulos, Nikolaos Panteleimon, Dinc, Niyazi Ulas, Ewaniuk, Jacob, Fan, Shanhui, Fang, Lu, Franchi, Riccardo, Freire, Pedro, Gentilini, Silvia, Gigan, Sylvain, Giorgi, Gian Luca, Gkantsidis, C., Gladrow, J., Goi, Elena, Goldmann, M., Grabulosa, A., Gu, Min, Guo, Xianxin, Hejda, Matěj, Horst, F., Hsieh, Jih Liang, Hu, Jianqi, Hu, Juejun, Huang, Chaoran, Hurtado, Antonio, Jaurigue, Lina, Kalinin, K. P., Kopae, Morteza Kamalian, Kelly, D. J., Khajavikhan, Mercedeh, Kremer, H., Laydevant, Jeremie, Lederman, Joshua C., Lee, Jongheon, Lenstra, Daan, Li, Gordon H. Y., Li, Mo, Li, Yuhang, Lin, Xing, Lin, Zhongjin, Lis, Mieszko, Lüdge, Kathy, Lugnan, Alessio, Lupo, Alessandro, Lvovsky, A. I., Manuylovich, Egor, Marandi, Alireza, Marchesin, Federico, Massar, Serge, McCaughan, Adam N., McMahon, Peter L., Pegios, Miltiadis Moralis, Morandotti, Roberto, Moser, Christophe, Moss, David J., Mukherjee, Avilash, Nikdast, Mahdi, Offrein, B. J., Oguz, Ilker, Oripov, Bakhrom, O'Shea, G., Ozcan, Aydogan, Parmigiani, F., Pasricha, Sudeep, Pavanello, Fabio, Pavesi, Lorenzo, Peserico, Nicola, Pickup, L., Pierangeli, Davide, Pleros, Nikos, Porte, Xavier, Primavera, Bryce A., Prucnal, Paul, Psaltis, Demetri, Puts, Lukas, Qiao, Fei, Rahmani, B., Raineri, Fabrice, Ocampo, Carlos A. Ríos, Robertson, Joshua, Romeira, Bruno, Carmes, Charles Roques, Rotenberg, Nir, Rowstron, A., Schoenhardt, Steffen, Schwartz, Russell L . T., Shainline, Jeffrey M., Shekhar, Sudip, Skalli, Anas, Sohoni, Mandar M., Sorger, Volker J., Soriano, Miguel C., Spall, James, Stabile, Ripalta, Stiller, Birgit, Sunada, Satoshi, Tefas, Anastasios, Tossoun, Bassem, Tsakyridis, Apostolos, Turitsyn, Sergei K., Van der Sande, Guy, Van Vaerenbergh, Thomas, Veraldi, Daniele, Verschaffelt, Guy, Vlieg, E. A., Wang, Hao, Wang, Tianyu, Wetzstein, Gordon, Wright, Logan G., Wu, Changming, Wu, Chu, Wu, Jiamin, Xia, Fei, Xu, Xingyuan, Yang, Hangbo, Yao, Weiming, Yildirim, Mustafa, Yoo, S. J. Ben, Youngblood, Nathan, Zambrini, Roberta, Zhang, Haiou, and Zhang, Weipeng
- Subjects
Computer Science - Emerging Technologies ,Physics - Applied Physics ,Physics - Optics - Abstract
This roadmap consolidates recent advances while exploring emerging applications, reflecting the remarkable diversity of hardware platforms, neuromorphic concepts, and implementation philosophies reported in the field. It emphasizes the critical role of cross-disciplinary collaboration in this rapidly evolving field.
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- 2025
21. Solving Boolean satisfiability problems with resistive content addressable memories
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Pedretti, Giacomo, Böhm, Fabian, Bhattacharya, Tinish, Heittman, Arne, Zhang, Xiangyi, Hizzani, Mohammad, Hutchinson, George, Kwon, Dongseok, Moon, John, Valiante, Elisabetta, Rozada, Ignacio, Graves, Catherine E., Ignowski, Jim, Mohseni, Masoud, Strachan, John Paul, Strukov, Dmitri, Beausoleil, Ray, and Van Vaerenbergh, Thomas
- Subjects
Computer Science - Emerging Technologies - Abstract
Solving optimization problems is a highly demanding workload requiring high-performance computing systems. Optimization solvers are usually difficult to parallelize in conventional digital architectures, particularly when stochastic decisions are involved. Recently, analog computing architectures for accelerating stochastic optimization solvers have been presented, but they were limited to academic problems in quadratic polynomial format. Here we present KLIMA, a k-Local In-Memory Accelerator with resistive Content Addressable Memories (CAMs) and Dot-Product Engines (DPEs) to accelerate the solution of high-order industry-relevant optimization problems, in particular Boolean Satisfiability. By co-designing the optimization heuristics and circuit architecture we improve the speed and energy to solution up to 182x compared to the digital state of the art.
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- 2025
22. Mitigating Source Structure in Geodetic VLBI on the Visibility Level
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Jaron, F., Baldreich, L., Böhm, J., Charlot, P., Collioud, A., Gruber, J., Krásná, H., Martí-Vidal, I., Nothnagel, A., and Pérez-Díez, V.
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Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
Geodetic and astrometric VLBI has entered a new era with the implementation of the VLBI Global Observing System (VGOS). These broadband and dual linear polarization observations aim at an accuracy of station coordinates of 1 mm and a reference frame stability of 0.1 mm/year. Although the extended brightness distribution of many of the radio-loud active galactic nuclei observed during geodetic VLBI sessions is resolved by the interferometer, the established processing chain still treats these objects as point sources. We investigate the impact of source structure on the visibility level and develop tools to remove the structure from the visibility data, right after correlation. Here we present our approach and show results obtained from observational VGOS data., Comment: 4 pages, 6 figures, published in Proceedings of the 16th EVN Symposium, Ed. E. Ros, P. Benke, S.A. Dzib, I. Rottmann, & J.A. Zensus, Bonn: Max-Planck-Institut f\"ur Radioastronomie, 2024, pages 145-148
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- 2025
23. Multiscalar Temporalities in Postcolonial Climate Fiction
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Böhm-Schnitker, Nadine
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Amitav Ghosh. Biosemiotics. Ecocriticism. Ethicology. Gun Island. Mahasweta Devi. Multiscalar temporalities. New materialism. The Hungry Tide ,English literature ,PR1-9680 - Abstract
In the context of postcolonial ecocriticism and environmental time studies, I analyse different but interrelated scenes of confrontations between human history, ‘generational time’, deep time and myth to highlight a trend towards multiscalar temporalities in Anglophone climate fiction. Co-reading Amitav Ghosh’s The Hungry Tide (2004), Gun Island (2019) and Mahasweta Devi’s “Pterodactyl, Puran Sahay and Pirtha” ([1989] 1995), I focus on the texts’ multi-generational character constellations and their specific confrontations with geological time to reveal the literary strategies to capture the “slow violence” (Nixon 2011, 2) of global warming.
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- 2023
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24. Coconut Palm Tree Counting on Drone Images with Deep Object Detection and Synthetic Training Data
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Rohe, Tobias, Böhm, Barbara, Kölle, Michael, Stein, Jonas, Müller, Robert, and Linnhoff-Popien, Claudia
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Computer Science - Computer Vision and Pattern Recognition - Abstract
Drones have revolutionized various domains, including agriculture. Recent advances in deep learning have propelled among other things object detection in computer vision. This study utilized YOLO, a real-time object detector, to identify and count coconut palm trees in Ghanaian farm drone footage. The farm presented has lost track of its trees due to different planting phases. While manual counting would be very tedious and error-prone, accurately determining the number of trees is crucial for efficient planning and management of agricultural processes, especially for optimizing yields and predicting production. We assessed YOLO for palm detection within a semi-automated framework, evaluated accuracy augmentations, and pondered its potential for farmers. Data was captured in September 2022 via drones. To optimize YOLO with scarce data, synthetic images were created for model training and validation. The YOLOv7 model, pretrained on the COCO dataset (excluding coconut palms), was adapted using tailored data. Trees from footage were repositioned on synthetic images, with testing on distinct authentic images. In our experiments, we adjusted hyperparameters, improving YOLO's mean average precision (mAP). We also tested various altitudes to determine the best drone height. From an initial mAP@.5 of $0.65$, we achieved 0.88, highlighting the value of synthetic images in agricultural scenarios., Comment: 9 pages
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- 2024
25. Critical nanoparticle formation in iron combustion: single particle experiments with in-situ multi-parameter diagnostics aided by multi-scale simulations
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Li, Tao, Nguyen, Bich-Diep, Gao, Yawei, Ning, Daoguan, Böhm, Benjamin, Scholtissek, Arne, van Duin, Adri C. T., Hasse, Christian, and Dreizler, Andreas
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Physics - Fluid Dynamics - Abstract
The formation of iron oxide nanoparticles (NPs) presents challenges such as efficiency losses and fine dust emissions in practical iron combustion systems, highlighting the need for deeper understanding of the formation mechanisms and thermochemical conditions. This study combines experiments and multi-scale simulations to analyze NP clouds generated by single iron particles burning in high-temperature oxidizing environments. The ambient gas conditions were provided by a laminar flat flame burner, with post-flame oxygen mole fractions varied between 20, 30, and 40 vol% at a constant temperature of ~1800K. High-speed in-situ diagnostics were used to measure particle size, NP initiation, NP cloud evolution, and microparticle surface temperature history. The experimental setup utilized three 10kHz imaging systems: one for two-color pyrometry and two for diffusive-backlight illumination (DBI), targeting particle size and NP measurements. The findings showcase the powerful capabilities of multi-physics diagnostics in quantifying NP initiation time and temperature, which depend on particle size and ambient oxygen concentration. CFD simulations revealed enhanced convection velocity driven by increased Stefan flow, which transported NPs toward parent iron particles under high-oxygen conditions. This delayed the detection of NP clouds, leading to higher microparticle temperatures at NP initiation. Molecular dynamics (MD) simulations uncovered FeO2(g) as a key NP precursor, forming when Fe atoms dissociate from the liquid phase. The initial temperature significantly influenced the resulting nanocluster composition, with Fe(II) dominating at higher temperatures and Fe(III) at lower temperatures. This integrated approach enhances understanding of NP formation in iron combustion, offering insights into the conditions affecting nanoparticle characteristics.
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- 2024
26. Machine learning enhanced multi-particle tracking in solid fuel combustion
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Chen, Haowen, Li, Yuhang, Böhm, Benjamin, and Li, Tao
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Physics - Applied Physics ,Physics - Fluid Dynamics - Abstract
Particle velocimetry is essential in solid fuel combustion studies, however, the accurate detection and tracking of particles in high Particle Number Density (PND) combustion scenario remain challenging. The current study advances the machine-learning approaches for precise velocity measurements of solid particles. For this, laser imaging experiments were performed for high-volatile bituminous coal particles burning in a laminar flow reactor. Particle positions were imaged using time-resolved Mie scattering. Various detection methods, including conventional blob detection and Machine Learning (ML) based You Only Look Once (YOLO) and Realtime Detection Transformer (RT-DETR) were employed and bench marked.~Particle tracking was performed using the Simple Online Realtime Tracking (SORT) algorithm. The results demonstrated the capability of machine learning models trained on low-PND data for prediction of high-PND data. Slicing Aided Hyper Inference (SAHI) algorithm is important for the better performance of the used models. By evaluating the velocity statistics, it is found that the mean particle velocity decreases with increasing PND, primarily due to stronger particle interactions. The particle dynamics are closely related to the position of combustion zone observed in the previous study. Thus, PND is considered as the dominant factor for the particle group combustion behavior of high-volatile solid fuels.
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- 2024
27. Impact of Pseudoexfoliative Syndrome on Effective Lens Position, Anterior Chamber Depth Changes, and Visual Outcome After Cataract Surgery
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Müller M, Pawlowicz K, Böhm M, Hemkeppler E, Lwowski C, Hinzelmann L, Shajari M, and Kohnen T
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pseudoexfoliative syndrome ,effective lens position ,anterior depth changes ,cataract surgery ,Ophthalmology ,RE1-994 - Abstract
Michael Müller, Katarzyna Pawlowicz, Myriam Böhm, Eva Hemkeppler, Christoph Lwowski, Lisa Hinzelmann, Mehdi Shajari, Thomas Kohnen Department of Ophthalmology, Goethe-University, Frankfurt, GermanyCorrespondence: Thomas KohnenDepartment of Ophthalmology, Goethe-University, Theodor-Stern-Kai 7, Frankfurt, 60590, GermanyTel +49 69 6301 3945Fax +49 69 6301 3893Email thomas.kohnen@kgu.dePurpose: To compare the effective lens position (ELP), anterior chamber depth (ACD) changes, and visual outcomes in patients with and without pseudoexfoliation syndrome (PEX) after cataract surgery.Design: Prospective, randomized, fellow-eye controlled clinical case series.Methods: This prospective comparative case series enrolled 56 eyes of 56 consecutive patients with (n = 28) or without PEX (n = 28) and clinically significant cataract who underwent standard phacoemulsification and were implanted with single-piece acrylic posterior chamber intraocular lenses (IOLs). The primary outcome parameters were the ACD referring to the distance between the corneal anterior surface and the lens anterior surface, which is an indicator of the postoperative axial position of the IOL (the so-called ELP) and distance corrected visual acuity (DCVA).Results: Before surgery, the ACD was 2.54 ± 0.42 mm in the PEX group and 2.53 ± 0.38 mm in the control group (p = 0.941). Postoperatively, the ACD was 4.29 ± 0.71 mm in the PEX group and 4.33 ± 0.72 mm in the normal group, respectively (p = 0.533). There was no significant difference in ACD changes between groups (PEX group: 1.75 ± 0.74 mm, control group: 1.81 ± 0.61 mm, p = 0.806) and DCVA pre- (p = 0.469) and postoperatively (PEX group: 0.11 ± 0.13 logMAR, control group: 0.09 ± 0.17 logMAR, p = 0.245) between groups.Conclusion: Preoperative and postoperative ACD, as an indicator of ELP, between PEX eyes and healthy eyes after cataract surgery showed no significant difference. Phacoemulsification induced similar changes in eyes with PEX compared to healthy eyes.Keywords: pseudoexfoliative syndrome, effective lens position, anterior chamber depth changes, cataract surgery
- Published
- 2021
28. The influence of the Covid-19 pandemic on Czech-Polish cross-border cooperation: From debordering to re-bordering?
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Böhm Hynek
- Subjects
covid-19 pandemic ,re-bordering ,cross-border cooperation and its roles ,czech-polish border ,poland ,czech republic ,Geography (General) ,G1-922 - Abstract
The COVID-19 pandemic brought many changes to social behaviours in Europe. One of its major consequences was the temporary closure of borders, which was introduced as a measure to prevent the uncontrolled pandemic spreading and involved internal Schengen borders. This has had a major impact in the way in which cross-border cooperation has been conducted in Europe, including the Czech-Polish borderland, as it dramatically restrained all flows across borders. In this paper, we evaluate the impact of the pandemic on five roles of cross-border cooperation: 1) as a multi-level governance form; 2) as a regional development tool; 3) as a para-diplomacy form; 4) as a post-conflict reconciliation tool; and 5) as Europe-building. We argue that the impacts of the pandemic complicated regional development and the Europe-building role of cross-border cooperation in the Czech-Polish borderland. The article envisages re-bordering processes also in the Czech-Polish borderland, but with important exceptions in the regions with a high level of cross-border integration, mainly in the Euroregion Těšínské Slezsko/Śląsk Cieszyński. The paper also calls for the elaboration of the guidelines for possible repeated (Schengen) border closures and proposes modifications of the INTERREG microprojects schemes, to keep them attractive also in times of expected cuts in public finances.
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- 2021
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29. SMART VALORIFICATION OF RECICLABLE TEXTILE WASTE
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DOBLE Liliana, BÖHM Gabriella, and PORUMB Camelia Luminița
- Subjects
recycling ,textile waste ,reuse ,blazer ,design ,Manufactures ,TS1-2301 - Abstract
Clothing belongs to the category of short-term textiles. In the field of clothing, the cycles that shape the moral wear and tear of the garment are followed at shorter and shorter intervals. If in the Middle Ages and even later clothes were bequeathed from one generation to the next, today, fashion cycles are followed from one season to the next. More and more questions are asked whether clothes are worth maintaining to reuse them next season. Can there be "ageless" clothes? Here we refer to clothing items that have a value through materiality, cut line, chromatic etc. For such "worthy" items, maintenance is a necessary process for adequate preservation, also extending the life, both physically-functionally and aesthetically. It is important not to forget that physical wear always leads to loss of both the function and the appearance for which the product was created. This is where the process of recycling both used clothing and waste left over from the manufacture of new products comes into play. Recycling brings many useful benefits both to the environment and to us as beneficiaries. This must be seen as a collective responsibility to ensure a sustainable future. Recycling is fundamental in promoting a prosperous economy, which is the new paradigm of sustainability, capable of reducing environmental implications and helping to create new opportunities, jobs in the textile industry.
- Published
- 2021
30. Basic Principles for Therapeutic Relationship and Practice in Gestalt Theoretical Psychotherapy
- Author
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Böhm Angelika
- Subjects
gestalt theoretical psychotherapy ,therapeutic relationship ,therapeutic attitude ,psychotherapeutic praxeology ,Philosophy. Psychology. Religion ,Psychology ,BF1-990 - Abstract
Gestalt Theoretical Psychotherapy, in the broader sense of the term, has developed in various forms on both sides of the Atlantic since the 1920s. Gestalt Theoretical Psychotherapy, in the narrower sense of the term, came into being in the second half of the 1970s in German-speaking countries. In Austria, it is a state-approved, independent scientific psychotherapy method since 1995, and an integrative psychotherapeutic approach based on the Gestalt theory of the Berlin School. With reference to this comprehensive, consistent, scientific theory, this article presents the basic concepts of therapeutic practice in the field of Gestalt psychotherapy. Starting from the overarching whole to the parts, the paper first examines the concept of therapeutic relationship and therapeutic attitude, and then describes the basic principles of the practical design of the therapeutic process.
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- 2021
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31. A Systematic Literature Review on Technology Acceptance Research on Augmented Reality in the Field of Training and Education
- Author
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Graser, Stefan and Böhm, Stephan
- Subjects
Computer Science - Human-Computer Interaction - Abstract
Augmented Reality (AR) is an emerging technology that ranks among the top innovations in interactive media. With the emergence of new technologies, the question about the factors influencing user acceptance arises. Many research models on the user acceptance of technologies were developed and extended to answer this question in the last decades. This research paper provides an overview of the current state in the scientific literature on user acceptance factors of AR in training and education. We conducted a systematic literature review, identifying 45 scientific papers on technology acceptance of augmented reality. Twenty-two papers refer more specifically to the field of training and education. Overall, 33 different technology acceptance models and 34 acceptance variables were identified. Based on the results, there is a great potential for further research., Comment: 8 pages, 7 figures, The Fifteenth International Conference on Advances in Human-oriented and Personalized Mechanisms, Technologies, and Services CENTRIC 2022
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- 2024
32. Identifying Semantic Similarity for UX Items from Established Questionnaires Using ChatGPT-4
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Graser, Stefan, Schrepp, Martin, and Böhm, Stephan
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Computer Science - Human-Computer Interaction - Abstract
Questionnaires are a widely used tool for measuring the user experience (UX) of products. There exists a huge number of such questionnaires that contain different items (questions) and scales representing distinct aspects of UX, such as efficiency, learnability, fun of use, or aesthetics. These items and scales are not independent; they often have semantic overlap. However, due to the large number of available items and scales in the UX f ield, analyzing and understanding these semantic dependencies can be challenging. Large language models (LLM) are powerful tools to categorize texts, including UX items. We explore how ChatGPT-4 can be utilized to analyze the semantic structure of sets of UX items. This paper investigates three different use cases. In the first investigation, ChatGPT-4 is used to generate a semantic classification of UX items extracted from 40 UX questionnaires. The results demonstrate that ChatGPT-4 can effectively classify items into meaningful topics. The second investigation demonstrates ChatGPT-4's ability to filter items related to a predefined UX concept from a pool of UX items. In the third investigation, a second set of more abstract items is used to describe another classification task. The outcome of this investigation helps to determine semantic similarities between common UX concepts and enhances our understanding of the concept of UX. Overall, it is considered useful to apply GenAI in UX research, Comment: 16 pages, 3 figures, International Journal on Advances in Systems and Measurements, vol 17 no 1 & 2, year 2024, http://www.iariajournals.org/systems_and_measurements/. arXiv admin note: substantial text overlap with arXiv:2411.13118
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- 2024
33. Using ChatGPT-4 for the Identification of Common UX Factors within a Pool of Measurement Items from Established UX Questionnaires
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Graser, Stefan, Böhm, Stephan, and Schrepp, Martin
- Subjects
Computer Science - Human-Computer Interaction - Abstract
Measuring User Experience (UX) with standardized questionnaires is a widely used method. A questionnaire is based on different scales that represent UX factors and items. However, the questionnaires have no common ground concerning naming different factors and the items used to measure them. This study aims to identify general UX factors based on the formulation of the measurement items. Items from a set of 40 established UX questionnaires were analyzed by Generative AI (GenAI) to identify semantically similar items and to cluster similar topics. We used the LLM ChatGPT-4 for this analysis. Results show that ChatGPT-4 can classify items into meaningful topics and thus help to create a deeper understanding of the structure of the UX research field. In addition, we show that ChatGPT-4 can filter items related to a predefined UX concept out of a pool of UX items., Comment: 10 pages, 1 figure, The Sixteenth International Conference on Advances in Human-oriented and Personalized Mechanisms, Technologies, and Services CENTRIC 2023
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- 2024
34. User Experience Evaluation of Augmented Reality: A Systematic Literature Review
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Graser, Stefan, Kirschenlohr, Felix, and Böhm, Stephan
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Computer Science - Human-Computer Interaction - Abstract
Due to technological development, Augmented Reality (AR) can be applied in different domains. However, innovative technologies refer to new interaction paradigms, thus creating a new experience for the user. This so-called User Experience (UX) is essential for developing and designing interactive products. Moreover, UX must be measured to get insights into the user's perception and, thus, to improve innovative technologies. We conducted a Systematic Literature Review (SLR) to provide an overview of the current research concerning UX evaluation of AR. In particular, we aim to identify (1) research referring to UX evaluation of AR and (2) articles containing AR-specific UX models or frameworks concerning the theoretical foundation. The SLR is a five-step approach including five scopes. From a total of 498 records based on eight search terms referring to two databases, 30 relevant articles were identified and further analyzed. Results show that most approaches concerning UX evaluation of AR are quantitative. In summary, five UX models/frameworks were identified. Concerning the UX evaluation results of AR in Training and Education, the UX was consistently positive. Negative aspects refer to errors and deficiencies concerning the AR system and its functionality. No specific metric for UX evaluation of AR in the field of Training and Education exists. Only three AR-specific standardized UX questionnaires could be found. However, the questionnaires do not refer to the field of Training and Education. Thus, there is a lack of research in the field of UX evaluation of AR in Training and Education., Comment: 18 pages, 11 figures, CENTRIC 2024 : The Seventeenth International Conference on Advances in Human-oriented and Personalized Mechanisms, Technologies, and Services
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- 2024
35. Construction of the UXAR-CT -- a User eXperience Questionnaire for Augmented Reality in Corporate Training
- Author
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Graser, Stefan, Schrepp, Martin, and Böhm, Stephan
- Subjects
Computer Science - Human-Computer Interaction - Abstract
Measuring User Experience (UX) with questionnaires is essential for developing and improving products. However, no domain-specific standardized UX questionnaire exists for Augmented Reality (AR) in Corporate Training (CT). Thus, this study introduces the UXAR-CT questionnaire - an AR-specific UX questionnaire for CT environments. We describe the construction procedure and the evaluation process of the questionnaire. A set of candidate items was constructed, and a larger sample of participants evaluated several AR-based learning scenarios with these items. Based on the results, we performed a Principal Component Analysis (PCA) to identify relevant measurement items for each scale. The three best-fitting items were selected based on the results to form the final questionnaire. The first results regarding scale quality indicate a high level of internal consistency. The final version of the UXAR-CT questionnaire is provided and will be evaluated in further research., Comment: 9 pages, 9 figures, CENTRIC 2024 : The Seventeenth International Conference on Advances in Human-oriented and Personalized Mechanisms, Technologies, and Services
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- 2024
36. Enhancing UX Research Activities Using GenAI -- Potential Applications and Challenges
- Author
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Graser, Stefan, Snimshchikova, Anastasia, Schrepp, Martin, and Böhm, Stephan
- Subjects
Computer Science - Human-Computer Interaction - Abstract
User Experience (UX) Research covers various methods for gathering the users' subjective impressions of a product. For this, practitioners face different activities and tasks related to the research process. This includes processing a large amount of data based on qualitative and quantitative data. However, this can be very laborious in practice. Thus, the application of GenAI can support UX research activities. This paper provides a practical perspective on this topic. Based on previous studies, we present different use cases indicating the potential of GenAI in UX research. Moreover, we provide insights into an exploratory study using GenAI along an entire UX research process. Results show that Large Language Models (LLMs) are useful for various tasks. Thus, the research activities can be carried out more efficiently. However, the researcher should always review results to ensure quality. In summary, we want to express the potential of GenAI enhancing UX research, Comment: 13 pages, 4 figures, CENTRIC 2024 : The Seventeenth International Conference on Advances in Human-oriented and Personalized Mechanisms, Technologies, and Services
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- 2024
37. Flow reconstruction in time-varying geometries using graph neural networks
- Author
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Danciu, Bogdan A., Pagone, Vito A., Böhm, Benjamin, Schmidt, Marius, and Frouzakis, Christos E.
- Subjects
Computer Science - Machine Learning ,Computer Science - Artificial Intelligence ,Physics - Fluid Dynamics - Abstract
The paper presents a Graph Attention Convolutional Network (GACN) for flow reconstruction from very sparse data in time-varying geometries. The model incorporates a feature propagation algorithm as a preprocessing step to handle extremely sparse inputs, leveraging information from neighboring nodes to initialize missing features. In addition, a binary indicator is introduced as a validity mask to distinguish between the original and propagated data points, enabling more effective learning from sparse inputs. Trained on a unique data set of Direct Numerical Simulations (DNS) of a motored engine at a technically relevant operating condition, the GACN shows robust performance across different resolutions and domain sizes and can effectively handle unstructured data and variable input sizes. The model is tested on previously unseen DNS data as well as on an experimental data set from Particle Image Velocimetry (PIV) measurements that were not considered during training. A comparative analysis shows that the GACN consistently outperforms both a conventional Convolutional Neural Network (CNN) and cubic interpolation methods on the DNS and PIV test sets by achieving lower reconstruction errors and better capturing fine-scale turbulent structures. In particular, the GACN effectively reconstructs flow fields from domains up to 14 times larger than those observed during training, with the performance advantage increasing for larger domains.
- Published
- 2024
38. A Toolkit for Measuring the Impacts of Public Funding on Open Source Software Development
- Author
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Osborne, Cailean, Sharratt, Paul, Foster, Dawn, and Boehm, Mirko
- Subjects
Computer Science - Computers and Society ,Computer Science - Software Engineering - Abstract
Governments are increasingly employing funding for open source software (OSS) development as a policy lever to support the security of software supply chains, digital sovereignty, economic growth, and national competitiveness in science and innovation, among others. However, the impacts of public funding on OSS development remain poorly understood, with a lack of consensus on how to meaningfully measure them. This gap hampers assessments of the return on public investment and impedes the optimisation of public-interest funding strategies. We address this gap with a toolkit of methodological considerations that may inform such measurements, drawing on prior work on OSS valuations and community health metrics by the Community Health Analytics Open Source Software (CHAOSS) project as well as our first-hand learnings as practitioners tasked with evaluating funding programmes by the Next Generation Internet initiative and the Sovereign Tech Agency. We discuss salient considerations, including the importance of accounting for funding objectives, project life stage and social structure, and regional and organisational cost factors. Next, we present a taxonomy of potential social, economic, and technological impacts that can be both positive and negative, direct and indirect, internal (i.e. within a project) and external (i.e. among a project's ecosystem of dependents and users), and manifest over various time horizons. Furthermore, we discuss the merits and limitations of qualitative, quantitative, and mixed-methods approaches, as well as options for and hazards of estimating multiplier effects. With this toolkit, we contribute to the multi-stakeholder conversation about the value and impacts of funding on OSS developers and society at large., Comment: 23 pages, 3 tables
- Published
- 2024
39. Measuring Software Innovation with Open Source Software Development Data
- Author
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Brown, Eva Maxfield, Osborne, Cailean, Cihon, Peter, Böhmecke-Schwafert, Moritz, Xu, Kevin, Boehm, Mirko, and Blind, Knut
- Subjects
Computer Science - Software Engineering - Abstract
This paper introduces a novel measure of software innovation based on open source software (OSS) development activity on GitHub. We examine the dependency growth and release complexity among $\sim$200,000 unique releases from 28,000 unique packages across the JavaScript, Python, and Ruby ecosystems over two years post-release. We find that major versions show differential, strong prediction of one-year lagged log change in dependencies. In addition, semantic versioning of OSS releases is correlated with their complexity and predict downstream adoption. We conclude that major releases of OSS packages count as a unit of innovation complementary to scientific publications, patents, and standards, offering applications for policymakers, managers, and researchers.
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- 2024
40. Neutrinoless Double Beta Decay Sensitivity of the XLZD Rare Event Observatory
- Author
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XLZD Collaboration, Aalbers, J., Abe, K., Adrover, M., Maouloud, S. Ahmed, Akerib, D. S., Musalhi, A. K. Al, Alder, F., Althueser, L., Amaral, D. W. P., Amarasinghe, C. S., Ames, A., Andrieu, B., Angelides, N., Angelino, E., Antunovic, B., Aprile, E., Araújo, H. M., Armstrong, J. E., Arthurs, M., Babicz, M., Bajpai, D., Baker, A., Balzer, M., Bang, J., Barberio, E., Bargemann, J. W., Barillier, E., Basharina-Freshville, A., Baudis, L., Bauer, D., Bazyk, M., Beattie, K., Beaupere, N., Bell, N. F., Bellagamba, L., Benson, T., Bhatti, A., Biesiadzinski, T. P., Biondi, R., Biondi, Y., Birch, H. J., Bishop, E., Bismark, A., Boehm, C., Boese, K., Bolotnikov, A., Brás, P., Braun, R., Breskin, A., Brew, C. A. J., Brommer, S., Brown, A., Bruni, G., Budnik, R., Burdin, S., Cai, C., Capelli, C., Carini, G., Carmona-Benitez, M. C., Carter, M., Chauvin, A., Chawla, A., Chen, H., Cherwinka, J. J., Chin, Y. T., Chott, N. I., Chavez, A. P. Cimental, Clark, K., Colijn, A. P., Colling, D. J., Conrad, J., Converse, M. V., Coronel, R., Costanzo, D., Cottle, A., Cox, G., Cuenca-García, J. J., Curran, D., Cussans, D., D'Andrea, V., Garcia, L. C. Daniel, Darlington, I., Dave, S., David, A., Davies, G. J., Decowski, M. P., Deisting, A., Delgaudio, J., Dey, S., Di Donato, C., Di Felice, L., Di Gangi, P., Diglio, S., Ding, C., Dobson, J. E. Y., Doerenkamp, M., Drexlin, G., Druszkiewicz, E., Dunbar, C. L., Eitel, K., Elykov, A., Engel, R., Eriksen, S. R., Fayer, S., Fearon, N. M., Ferella, A. D., Ferrari, C., Fieldhouse, N., Fischer, H., Flaecher, H., Flehmke, T., Flierman, M., Fraser, E. D., Fruth, T. M. A., Fujikawa, K., Fulgione, W., Fuselli, C., Gaemers, P., Gaior, R., Gaitskell, R. J., Gallice, N., Galloway, M., Gao, F., Garroum, N., Geffre, A., Genovesi, J., Ghag, C., Ghosh, S., Giacomobono, R., Gibbons, R., Girard, F., Glade-Beucke, R., Glück, F., Gokhale, S., Grandi, L., Green, J., Grigat, J., van der Grinten, M. G. D., Größle, R., Guan, H., Guida, M., Gyorgy, P., Haiston, J. J., Hall, C. R., Hall, T., Hammann, R., Hannen, V., Hansmann-Menzemer, S., Hargittai, N., Hartigan-O'Connor, E., Haselschwardt, S. J., Hernandez, M., Hertel, S. A., Higuera, A., Hils, C., Hiraoka, K., Hoetzsch, L., Hoferichter, M., Homenides, G. J., Hood, N. F., Horn, M., Huang, D. Q., Hughes, S., Hunt, D., Iacovacci, M., Itow, Y., Jacquet, E., Jakob, J., James, R. S., Joerg, F., Jones, S., Kaboth, A. C., Kahlert, F., Kamaha, A. C., Kaminaga, Y., Kara, M., Kavrigin, P., Kazama, S., Keller, M., Kemp-Russell, P., Khaitan, D., Kharbanda, P., Kilminster, B., Kim, J., Kirk, R., Kleifges, M., Klute, M., Kobayashi, M., Kodroff, D., Koke, D., Kopec, A., Korolkova, E. V., Kraus, H., Kravitz, S., Kreczko, L., von Krosigk, B., Kudryavtsev, V. A., Kuger, F., Kurita, N., Landsman, H., Lang, R. F., Lawes, C., Lee, J., Lehnert, B., Leonard, D. S., Lesko, K. T., Levinson, L., Li, A., Li, I., Li, S., Liang, S., Liang, Z., Lin, J., Lin, Y. -T., Lindemann, S., Linden, S., Lindner, M., Lindote, A., Lippincott, W. H., Liu, K., Loizeau, J., Lombardi, F., Lopes, J. A. M., Lopes, M. I., Lorenzon, W., Loutit, M., Lu, C., Lucchetti, G. M., Luce, T., Luitz, S., Ma, Y., Macolino, C., Mahlstedt, J., Maier, B., Majewski, P. A., Manalaysay, A., Mancuso, A., Manenti, L., Mannino, R. L., Marignetti, F., Marley, T., Undagoitia, T. Marrodán, Martens, K., Masbou, J., Masson, E., Mastroianni, S., Maupin, C., McCabe, C., McCarthy, M. E., McKinsey, D. N., McLaughlin, J. B., Melchiorre, A., Menéndez, J., Messina, M., Miller, E. H., Milosovic, B., Milutinovic, S., Miuchi, K., Miyata, R., Mizrachi, E., Molinario, A., Monteiro, C. M. B., Monzani, M. E., Morå, K., Moriyama, S., Morrison, E., Morteau, E., Mosbacher, Y., Mount, B. J., Müller, J., Murdy, M., Murphy, A. St. J., Murra, M., Naylor, A., Nelson, H. N., Neves, F., Newstead, J. L., Nguyen, A., Ni, K., O'Hare, C., Oberlack, U., Obradovic, M., Olcina, I., Oliver-Mallory, K. C., Gann, G. D. Orebi, Orpwood, J., Ostrowskiy, I., Ouahada, S., Oyulmaz, K., Paetsch, B., Palladino, K. J., Palmer, J., Pan, Y., Pandurovic, M., Pannifer, N. J., Paramesvaran, S., Patton, S. J., Pellegrini, Q., Penning, B., Pereira, G., Peres, R., Perry, E., Pershing, T., Piastra, F., Pienaar, J., Piepke, A., Pierre, M., Plante, G., Pollmann, T. R., Principe, L., Qi, J., Qiao, K., Qie, Y., Qin, J., Radeka, S., Radeka, V., Rajado, M., García, D. Ramírez, Ravindran, A., Razeto, A., Reichenbacher, J., Rhyne, C. A., Richards, A., Rischbieter, G. R. C., Riyat, H. S., Rosero, R., Roy, A., Rushton, T., Rynders, D., Saakyan, R., Sanchez, L., Sanchez-Lucas, P., Santone, D., Santos, J. M. F. dos, Sartorelli, G., Sazzad, A. B. M. R., Scaffidi, A., Schnee, R. W., Schreiner, J., Schulte, P., Schulze, H., Eißing, Schumann, M., Schwenck, A., Schwenk, A., Lavina, L. Scotto, Selvi, M., Semeria, F., Shagin, P., Sharma, S., Shaw, S., Shen, W., Sherman, L., Shi, S., Shi, S. Y., Shimada, T., Shutt, T., Silk, J. J., Silva, C., Simgen, H., Sinev, G., Singh, R., Siniscalco, J., Solmaz, M., Solovov, V. N., Song, Z., Sorensen, P., Soria, J., Stanley, O., Steidl, M., Stenhouse, T., Stevens, A., Stifter, K., Sumner, T. J., Takeda, A., Tan, P. -L., Taylor, D. J., Taylor, W. C., Thers, D., Thümmler, T., Tiedt, D. R., Tönnies, F., Tong, Z., Toschi, F., Tovey, D. R., Tranter, J., Trask, M., Trinchero, G., Tripathi, M., Tronstad, D. R., Trotta, R., Tunnell, C. D., Urquijo, P., Usón, A., Utoyama, M., Vaitkus, A. C., Valentino, O., Valerius, K., Vecchi, S., Velan, V., Vetter, S., de Viveiros, L., Volta, G., Vorkapic, D., Wang, A., Wang, J. J., Wang, W., Wang, Y., Waters, D., Weerman, K. M., Weinheimer, C., Weiss, M., Wenz, D., Whitis, T. J., Wild, K., Williams, M., Wilson, M., Wilson, S. T., Wittweg, C., Wolf, J., Wolfs, F. L. H., Woodford, S., Woodward, D., Worcester, M., Wright, C. J., Wu, V. H. S., üstling, S. W, Wurm, M., Xia, Q., Xing, Y., Xu, D., Xu, J., Xu, Y., Xu, Z., Yamashita, M., Yang, L., Ye, J., Yeh, M., Yu, B., Zavattini, G., Zha, W., Zhong, M., and Zuber, K.
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Physics - Instrumentation and Detectors ,High Energy Physics - Experiment ,Nuclear Experiment - Abstract
The XLZD collaboration is developing a two-phase xenon time projection chamber with an active mass of 60 to 80 t capable of probing the remaining WIMP-nucleon interaction parameter space down to the so-called neutrino fog. In this work we show that, based on the performance of currently operating detectors using the same technology and a realistic reduction of radioactivity in detector materials, such an experiment will also be able to competitively search for neutrinoless double beta decay in $^{136}$Xe using a natural-abundance xenon target. XLZD can reach a 3$\sigma$ discovery potential half-life of 5.7$\times$10$^{27}$ yr (and a 90% CL exclusion of 1.3$\times$10$^{28}$ yr) with 10 years of data taking, corresponding to a Majorana mass range of 7.3-31.3 meV (4.8-20.5 meV). XLZD will thus exclude the inverted neutrino mass ordering parameter space and will start to probe the normal ordering region for most of the nuclear matrix elements commonly considered by the community., Comment: 29 pages, 7 figures
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- 2024
41. The HUSTLE Program: The UV to Near-Infrared HST WFC3/UVIS G280 Transmission Spectrum of WASP-127b
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Boehm, V. A., Lewis, N. K., Fairman, C. E., Moran, S. E., Gascón, C., Wakeford, H. R., Alam, M. K., Alderson, L., Barstow, J., Batalha, N. E., Grant, D., López-Morales, M., MacDonald, R. J., Marley, M. S., and Ohno, K.
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Astrophysics - Earth and Planetary Astrophysics - Abstract
Ultraviolet wavelengths offer unique insights into aerosols in exoplanetary atmospheres. However, only a handful of exoplanets have been observed in the ultraviolet to date. Here, we present the ultraviolet-visible transmission spectrum of the inflated hot Jupiter WASP-127b. We observed one transit of WASP-127b with WFC3/UVIS G280 as part of the Hubble Ultraviolet-optical Survey of Transiting Legacy Exoplanets (HUSTLE), obtaining a transmission spectrum from 200-800 nm. Our reductions yielded a broad-band transit depth precision of 91 ppm and a median precision of 240 ppm across 59 spectral channels. Our observations are suggestive of a high-altitude cloud layer with forward modeling showing they are composed of sub-micron particles and retrievals indicating a high opacity patchy cloud. While our UVIS/G280 data only offers weak evidence for Na, adding archival HST WFC3/IR and STIS observations raises the overall Na detection significance to 4.1-sigma. Our work demonstrates the capabilities of HST WFC3/UVIS G280 observations to probe the aerosols and atmospheric composition of transiting hot Jupiters with comparable precision to HST STIS., Comment: 25 pages, 8 figures, 6 tables
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- 2024
42. The XLZD Design Book: Towards the Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
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XLZD Collaboration, Aalbers, J., Abe, K., Adrover, M., Maouloud, S. Ahmed, Akerib, D. S., Musalhi, A. K. Al, Alder, F., Althueser, L., Amaral, D. W. P., Amarasinghe, C. S., Ames, A., Andrieu, B., Angelides, N., Angelino, E., Antunovic, B., Aprile, E., Araújo, H. M., Armstrong, J. E., Arthurs, M., Babicz, M., Bajpai, D., Baker, A., Balzer, M., Bang, J., Barberio, E., Bargemann, J. W., Barillier, E., Basharina-Freshville, A., Baudis, L., Bauer, D., Bazyk, M., Beattie, K., Beaupere, N., Bell, N. F., Bellagamba, L., Benson, T., Bhatti, A., Biesiadzinski, T. P., Biondi, R., Biondi, Y., Birch, H. J., Bishop, E., Bismark, A., Boehm, C., Boese, K., Bolotnikov, A., Brás, P., Braun, R., Breskin, A., Brew, C. A. J., Brommer, S., Brown, A., Bruni, G., Budnik, R., Burdin, S., Cai, C., Capelli, C., Carini, G., Carmona-Benitez, M. C., Carter, M., Chauvin, A., Chawla, A., Chen, H., Cherwinka, J. J., Chin, Y. T., Chott, N. I., Chavez, A. P. Cimental, Clark, K., Colijn, A. P., Colling, D. J., Conrad, J., Converse, M. V., Coronel, R., Costanzo, D., Cottle, A., Cox, G., Cuenca-García, J. J., Curran, D., Cussans, D., D'Andrea, V., Garcia, L. C. Daniel, Darlington, I., Dave, S., David, A., Davies, G. J., Decowski, M. P., Deisting, A., Delgaudio, J., Dey, S., Di Donato, C., Di Felice, L., Di Gangi, P., Diglio, S., Ding, C., Dobson, J. E. Y., Doerenkamp, M., Drexlin, G., Druszkiewicz, E., Dunbar, C. L., Eitel, K., Elykov, A., Engel, R., Eriksen, S. R., Fayer, S., Fearon, N. M., Ferella, A. D., Ferrari, C., Fieldhouse, N., Fischer, H., Flaecher, H., Flehmke, T., Flierman, M., Fraser, E. D., Fruth, T. M. A., Fujikawa, K., Fulgione, W., Fuselli, C., Gaemers, P., Gaior, R., Gaitskell, R. J., Gallice, N., Galloway, M., Gao, F., Garroum, N., Geffre, A., Genovesi, J., Ghag, C., Ghosh, S., Giacomobono, R., Gibbons, R., Girard, F., Glade-Beucke, R., Glück, F., Gokhale, S., Grandi, L., Green, J., Grigat, J., van der Grinten, M. G. D., Größle, R., Guan, H., Guida, M., Gyorgy, P., Haiston, J. J., Hall, C. R., Hall, T., Hammann, R., Hannen, V., Hansmann-Menzemer, S., Hargittai, N., Hartigan-O'Connor, E., Haselschwardt, S. J., Hernandez, M., Hertel, S. A., Higuera, A., Hils, C., Hiraoka, K., Hoetzsch, L., Hoferichter, M., Homenides, G. J., Hood, N. F., Horn, M., Huang, D. Q., Hughes, S., Hunt, D., Iacovacci, M., Itow, Y., Jacquet, E., Jakob, J., James, R. S., Joerg, F., Jones, S., Kaboth, A. C., Kahlert, F., Kamaha, A. C., Kaminaga, Y., Kara, M., Kavrigin, P., Kazama, S., Keller, M., Kemp-Russell, P., Khaitan, D., Kharbanda, P., Kilminster, B., Kim, J., Kirk, R., Kleifges, M., Klute, M., Kobayashi, M., Kodroff, D., Koke, D., Kopec, A., Korolkova, E. V., Kraus, H., Kravitz, S., Kreczko, L., von Krosigk, B., Kudryavtsev, V. A., Kuger, F., Kurita, N., Landsman, H., Lang, R. F., Lawes, C., Lee, J., Lehnert, B., Leonard, D. S., Lesko, K. T., Levinson, L., Li, A., Li, I., Li, S., Liang, S., Liang, Z., Lin, J., Lin, Y. -T., Lindemann, S., Linden, S., Lindner, M., Lindote, A., Lippincott, W. H., Liu, K., Loizeau, J., Lombardi, F., Lopes, J. A. M., Lopes, M. I., Lorenzon, W., Loutit, M., Lu, C., Lucchetti, G. M., Luce, T., Luitz, S., Ma, Y., Macolino, C., Mahlstedt, J., Maier, B., Majewski, P. A., Manalaysay, A., Mancuso, A., Manenti, L., Mannino, R. L., Marignetti, F., Marley, T., Undagoitia, T. Marrodán, Martens, K., Masbou, J., Masson, E., Mastroianni, S., Maupin, C., McCabe, C., McCarthy, M. E., McKinsey, D. N., McLaughlin, J. B., Melchiorre, A., Menéndez, J., Messina, M., Miller, E. H., Milosovic, B., Milutinovic, S., Miuchi, K., Miyata, R., Mizrachi, E., Molinario, A., Monteiro, C. M. B., Monzani, M. E., Morå, K., Moriyama, S., Morrison, E., Morteau, E., Mosbacher, Y., Mount, B. J., Müller, J., Murdy, M., Murphy, A. St. J., Murra, M., Naylor, A., Nelson, H. N., Neves, F., Newstead, J. L., Nguyen, A., Ni, K., O'Hare, C., Oberlack, U., Obradovic, M., Olcina, I., Oliver-Mallory, K. C., Gann, G. D. Orebi, Orpwood, J., Ostrowskiy, I., Ouahada, S., Oyulmaz, K., Paetsch, B., Palladino, K. J., Palmer, J., Pan, Y., Pandurovic, M., Pannifer, N. J., Paramesvaran, S., Patton, S. J., Pellegrini, Q., Penning, B., Pereira, G., Peres, R., Perry, E., Pershing, T., Piastra, F., Pienaar, J., Piepke, A., Pierre, M., Plante, G., Pollmann, T. R., Principe, L., Qi, J., Qiao, K., Qie, Y., Qin, J., Radeka, S., Radeka, V., Rajado, M., García, D. Ramírez, Ravindran, A., Razeto, A., Reichenbacher, J., Rhyne, C. A., Richards, A., Rischbieter, G. R. C., Riyat, H. S., Rosero, R., Roy, A., Rushton, T., Rynders, D., Saakyan, R., Sanchez, L., Sanchez-Lucas, P., Santone, D., Santos, J. M. F. dos, Sartorelli, G., Sazzad, A. B. M. R., Scaffidi, A., Schnee, R. W., Schreiner, J., Schulte, P., Schulze, H., Eißing, Schumann, M., Schwenck, A., Schwenk, A., Lavina, L. Scotto, Selvi, M., Semeria, F., Shagin, P., Sharma, S., Shaw, S., Shen, W., Sherman, L., Shi, S., Shi, S. Y., Shimada, T., Shutt, T., Silk, J. J., Silva, C., Simgen, H., Sinev, G., Singh, R., Siniscalco, J., Solmaz, M., Solovov, V. N., Song, Z., Sorensen, P., Soria, J., Stanley, O., Steidl, M., Stenhouse, T., Stevens, A., Stifter, K., Sumner, T. J., Takeda, A., Tan, P. -L., Taylor, D. J., Taylor, W. C., Thers, D., Thümmler, T., Tiedt, D. R., Tönnies, F., Tong, Z., Toschi, F., Tovey, D. R., Tranter, J., Trask, M., Trinchero, G., Tripathi, M., Tronstad, D. R., Trotta, R., Tunnell, C. D., Urquijo, P., Usón, A., Utoyama, M., Vaitkus, A. C., Valentino, O., Valerius, K., Vecchi, S., Velan, V., Vetter, S., de Viveiros, L., Volta, G., Vorkapic, D., Wang, A., Wang, J. J., Wang, W., Wang, Y., Waters, D., Weerman, K. M., Weinheimer, C., Weiss, M., Wenz, D., Whitis, T. J., Wild, K., Williams, M., Wilson, M., Wilson, S. T., Wittweg, C., Wolf, J., Wolfs, F. L. H., Woodford, S., Woodward, D., Worcester, M., Wright, C. J., Wu, V. H. S., üstling, S. W, Wurm, M., Xia, Q., Xing, Y., Xu, D., Xu, J., Xu, Y., Xu, Z., Yamashita, M., Yang, L., Ye, J., Yeh, M., Yu, B., Zavattini, G., Zha, W., Zhong, M., and Zuber, K.
- Subjects
High Energy Physics - Experiment ,High Energy Physics - Phenomenology ,Physics - Instrumentation and Detectors - Abstract
This report describes the experimental strategy and technologies for a next-generation xenon observatory sensitive to dark matter and neutrino physics. The detector will have an active liquid xenon target mass of 60-80 tonnes and is proposed by the XENON-LUX-ZEPLIN-DARWIN (XLZD) collaboration. The design is based on the mature liquid xenon time projection chamber technology of the current-generation experiments, LZ and XENONnT. A baseline design and opportunities for further optimization of the individual detector components are discussed. The experiment envisaged here has the capability to explore parameter space for Weakly Interacting Massive Particle (WIMP) dark matter down to the neutrino fog, with a 3$\sigma$ evidence potential for the spin-independent WIMP-nucleon cross sections as low as $3\times10^{-49}\rm cm^2$ (at 40 GeV/c$^2$ WIMP mass). The observatory is also projected to have a 3$\sigma$ observation potential of neutrinoless double-beta decay of $^{136}$Xe at a half-life of up to $5.7\times 10^{27}$ years. Additionally, it is sensitive to astrophysical neutrinos from the atmosphere, sun, and galactic supernovae., Comment: 32 pages, 14 figures
- Published
- 2024
43. Reducing annotator bias by belief elicitation
- Author
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Jakobsen, Terne Sasha Thorn, Bjerre-Nielsen, Andreas, and Böhm, Robert
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Computer Science - Computation and Language ,Computer Science - Artificial Intelligence ,Economics - General Economics ,68T50 ,I.2.7 - Abstract
Crowdsourced annotations of data play a substantial role in the development of Artificial Intelligence (AI). It is broadly recognised that annotations of text data can contain annotator bias, where systematic disagreement in annotations can be traced back to differences in the annotators' backgrounds. Being unaware of such annotator bias can lead to representational bias against minority group perspectives and therefore several methods have been proposed for recognising bias or preserving perspectives. These methods typically require either a substantial number of annotators or annotations per data instance. In this study, we propose a simple method for handling bias in annotations without requirements on the number of annotators or instances. Instead, we ask annotators about their beliefs of other annotators' judgements of an instance, under the hypothesis that these beliefs may provide more representative and less biased labels than judgements. The method was examined in two controlled, survey-based experiments involving Democrats and Republicans (n=1,590) asked to judge statements as arguments and then report beliefs about others' judgements. The results indicate that bias, defined as systematic differences between the two groups of annotators, is consistently reduced when asking for beliefs instead of judgements. Our proposed method therefore has the potential to reduce the risk of annotator bias, thereby improving the generalisability of AI systems and preventing harm to unrepresented socio-demographic groups, and we highlight the need for further studies of this potential in other tasks and downstream applications.
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- 2024
44. Adjoint computation of Berry phase gradients
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Bösch, Cyrill, Serra-Garcia, Marc, Böhm, Christian, and Fichtner, Andreas
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Condensed Matter - Mesoscale and Nanoscale Physics ,Mathematics - Numerical Analysis - Abstract
Berry phases offer a geometric perspective on wave propagation and are key to designing materials with topological wave transport. However, controlling Berry phases is challenging due to their dependence on global integrals over the Brillouin zone, making differentiation difficult. We present an adjoint-based method for efficiently computing the gradient of the Berry phase with respect to system parameters, involving only one forward and one adjoint calculation. This approach enables the use of advanced optimization techniques, such as topology optimization, to design new materials with tailored topological wave properties., Comment: 9 pages, 1 figure
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- 2024
45. SHADE: Deep Density-based Clustering
- Author
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Beer, Anna, Weber, Pascal, Miklautz, Lukas, Leiber, Collin, Durani, Walid, Böhm, Christian, and Plant, Claudia
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Computer Science - Machine Learning - Abstract
Detecting arbitrarily shaped clusters in high-dimensional noisy data is challenging for current clustering methods. We introduce SHADE (Structure-preserving High-dimensional Analysis with Density-based Exploration), the first deep clustering algorithm that incorporates density-connectivity into its loss function. Similar to existing deep clustering algorithms, SHADE supports high-dimensional and large data sets with the expressive power of a deep autoencoder. In contrast to most existing deep clustering methods that rely on a centroid-based clustering objective, SHADE incorporates a novel loss function that captures density-connectivity. SHADE thereby learns a representation that enhances the separation of density-connected clusters. SHADE detects a stable clustering and noise points fully automatically without any user input. It outperforms existing methods in clustering quality, especially on data that contain non-Gaussian clusters, such as video data. Moreover, the embedded space of SHADE is suitable for visualization and interpretation of the clustering results as the individual shapes of the clusters are preserved., Comment: Short version accepted at ICDM 2024
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- 2024
46. Model-independent searches of new physics in DARWIN with a semi-supervised deep learning pipeline
- Author
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Aalbers, J., Abe, K., Adrover, M., Maouloud, S. Ahmed, Althueser, L., Amaral, D. W. P., Andrieu, B., Angelino, E., Martin, D. Antón, Antunovic, B., Aprile, E., Babicz, M., Bajpai, D., Balzer, M., Barberio, E., Baudis, L., Bazyk, M., Bell, N. F., Bellagamba, L., Biondi, R., Biondi, Y., Bismark, A., Boehm, C., Boese, K., Braun, R., Breskin, A., Brommer, S., Brown, A., Bruni, G., Budnik, R., Cai, C., Capelli, C., Chauvin, A., Chavez, A. P. Cimental, Colijn, A. P., Conrad, J., Cuenca-García, J. J., D'Andrea, V., Garcia, L. C. Daniel, Decowski, M. P., Deisting, A., Di Donato, C., Di Gangi, P., Diglio, S., Doerenkamp, M., Drexlin, G., Eitel, K., Elykov, A., Engel, R., Ferella, A. D., Ferrari, C., Fischer, H., Flehmke, T., Flierman, M., Fujikawa, K., Fulgione, W., Fuselli, C., Gaemers, P., Gaior, R., Galloway, M., Gao, F., Garroum, N., Giacomobono, R., Girard, F., Glade-Beucke, R., Glück, F., Grandi, L., Grigat, J., Größle, R., Guan, H., Guida, M., Gyorgy, P., Hammann, R., Hannen, V., Hansmann-Menzemer, S., Hargittai, N., Higuera, A., Hils, C., Hiraoka, K., Hoetzsch, L., Hoferichter, M., Hood, N. F., Iacovacci, M., Itow, Y., Jakob, J., James, R. S., Joerg, F., Kahlert, F., Kaminaga, Y., Kara, M., Kavrigin, P., Kazama, S., Keller, M., Kharbanda, P., Kilminster, B., Kleifges, M., Klute, M., Kobayashi, M., Koke, D., Kopec, A., von Krosigk, B., Kuger, F., LaCascio, L., Landsman, H., Lang, R. F., Levinson, L., Li, I., Li, A., Li, S., Liang, S., Liang, Z., Lin, Y. -T., Lindemann, S., Lindner, M., Liu, K., Loizeau, J., Lombardi, F., Long, J., Lopes, J. A. M., Lucchetti, G. M., Luce, T., Ma, Y., Macolino, C., Mahlstedt, J., Maier, B., Mancuso, A., Manenti, L., Marignetti, F., Undagoitia, T. Marrodán, Martens, K., Masbou, J., Masson, E., Mastroianni, S., Melchiorre, A., Menéndez, J., Messina, M., Milosovic, B., Milutinovic, S., Miuchi, K., Miyata, R., Molinario, A., Monteiro, C. M. B., Morå, K., Moriyama, S., Morteau, E., Mosbacher, Y., Müller, J., Murra, M., Newstead, J. L., Ni, K., O'Hare, C., Oberlack, U., Obradovic, M., Ostrowskiy, I., Ouahada, S., Paetsch, B., Pan, Y., Pandurovic, M., Pellegrini, Q., Peres, R., Piastra, F., Pienaar, J., Pierre, M., Plante, G., Pollmann, T. R., Principe, L., Qi, J., Qiao, K., Qin, J., Rajado, M., García, D. Ramírez, Ravindran, A., Razeto, A., Sanchez, L., Sanchez-Lucas, P., Sartorelli, G., Scaffidi, A., Schreiner, J., Schulte, P., Eißing, H. Schulze, Schumann, M., Schwenck, A., Schwenk, A., Lavina, L. Scotto, Selvi, M., Semeria, F., Shagin, P., Sharma, S., Shen, W., Shi, S. Y., Shimada, T., Simgen, H., Singh, R., Solmaz, M., Stanley, O., Steidl, M., Stevens, A., Takeda, A., Tan, P. -L., Thers, D., Thümmler, T., Tönnies, F., Toschi, F., Trinchero, G., Trotta, R., Tunnell, C. D., Urquijo, P., Utoyama, M., Valerius, K., Vecchi, S., Vetter, S., Volta, G., Vorkapic, D., Wang, W., Weerman, K. M., Weinheimer, C., Weiss, M., Wenz, D., Wilson, M., Wittweg, C., Wolf, J., Wu, V. H. S., Wüstling, S., Wurm, M., Xing, Y., Xu, D., Xu, Z., Yamashita, M., Yang, L., Ye, J., Yuan, L., Zavattini, G., Zhong, M., and Zuber, K.
- Subjects
Physics - Instrumentation and Detectors - Abstract
We present a novel deep learning pipeline to perform a model-independent, likelihood-free search for anomalous (i.e., non-background) events in the proposed next generation multi-ton scale liquid Xenon-based direct detection experiment, DARWIN. We train an anomaly detector comprising a variational autoencoder and a classifier on extensive, high-dimensional simulated detector response data and construct a one-dimensional anomaly score optimised to reject the background only hypothesis in the presence of an excess of non-background-like events. We benchmark the procedure with a sensitivity study that determines its power to reject the background-only hypothesis in the presence of an injected WIMP dark matter signal, outperforming the classical, likelihood-based background rejection test. We show that our neural networks learn relevant energy features of the events from low-level, high-dimensional detector outputs, without the need to compress this data into lower-dimensional observables, thus reducing computational effort and information loss. For the future, our approach lays the foundation for an efficient end-to-end pipeline that eliminates the need for many of the corrections and cuts that are traditionally part of the analysis chain, with the potential of achieving higher accuracy and significant reduction of analysis time., Comment: 10 Figures, 3 Tables, 23 Pages (incl. references)
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- 2024
47. Using dust to constrain dark matter models
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Ussing, Adam, Paun, Robert Mostoghiu, Croton, Darren, Boehm, Celine, Duffy, Alan, and Power, Chris
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
In this paper, we use hydrodynamic zoom-in simulations of Milky Way-type haloes to explore using dust as an observational tracer to discriminate between cold and warm dark matter (WDM) universes. Comparing a cold and 3.5 keV WDM particle model, we tune the efficiency of galaxy formation in our simulations using a variable supernova rate to create Milky Way systems with similar satellite galaxy populations while keeping all other simulation parameters the same. Cold dark matter (CDM), having more substructure, requires a higher supernova efficiency than WDM to achieve the same satellite galaxy number. These different supernova efficiencies create different dust distributions around their host galaxies, which we generate by post-processing the simulation output with the \powderday{} codebase. Analysing the resulting dust in each simulation, we find $\sim$4.5 times more dust in our CDM Milky Way haloes compared with WDM. The distribution of dust out to $R_{200\text{c}}$ is then explored, revealing that the WDM simulations are noticeably less concentrated than their CDM counterparts, although differences in substructure complicate the comparison. Our results indicate that dust is a possible unique probe to test theories of dark matter., Comment: Accepted for publication to MNRAS, 12 pages, 5 figures
- Published
- 2024
- Full Text
- View/download PDF
48. Distributed Binary Optimization with In-Memory Computing: An Application for the SAT Problem
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Zhang, Xiangyi, Böhm, Fabian, Valiante, Elisabetta, Noori, Moslem, Van Vaerenbergh, Thomas, Yang, Chan-Woo, Pedretti, Giacomo, Mohseni, Masoud, Beausoleil, Raymond, and Rozada, Ignacio
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Computer Science - Emerging Technologies ,Computer Science - Hardware Architecture ,Mathematics - Optimization and Control - Abstract
In-memory computing (IMC) has been shown to be a promising approach for solving binary optimization problems while significantly reducing energy and latency. Building on the advantages of parallel computation, we propose an IMC-compatible parallelism framework inspired by parallel tempering (PT), enabling cross-replica communication to improve the performance of IMC solvers. This framework enables an IMC solver not only to improve performance beyond what can be achieved through parallelization, but also affords greater flexibility for the search process with low hardware overhead. We justify that the framework can be applied to almost any IMC solver. We demonstrate the effectiveness of the framework for the Boolean satisfiability (SAT) problem, using the WalkSAT heuristic as a proxy for existing IMC solvers. The resulting PT-inspired cooperative WalkSAT (PTIC-WalkSAT) algorithm outperforms the traditional WalkSAT heuristic in terms of the iterations-to-solution in 76.3% of the tested problem instances and its na\"ive parallel variant (PA-WalkSAT) does so in 68.4% of the instances. An estimate of the energy overhead of the PTIC framework for two hardware accelerator architectures indicates that in both cases the overhead of running the PTIC framework would be less than 1% of the total energy required to run each accelerator., Comment: 21 pages, 9 figures
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- 2024
49. First measurement of the weak mixing angle in direct detection experiments
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Maity, Tarak Nath and Boehm, Celine
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High Energy Physics - Phenomenology ,Astrophysics - Solar and Stellar Astrophysics ,High Energy Physics - Experiment - Abstract
Current ton-scale dark matter direct detection experiments have reached an important milestone with the detection of solar neutrinos. In this paper, we show that these data can be used to determine a critical parameter of the Standard Model in particle physics, across an energy regime that has never been probed before. In particular, we show that the value of the weak mixing angle ($\theta_W$) which relates the mass of the $W$ and $Z$ bosons can be derived from 1) the recent measurements of coherent neutrino-nucleus scattering by PandaX-4T and XENONnT in the sub-GeV energy range -- a regime which is usually only probed by low energy neutrino experiments -- and from 2) XENONnT electron recoil data through neutrino-electron scattering at energy scale $\simeq 0.1 ~ \rm{ MeV}$, corresponding to a momentum transfer region over an order of magnitude smaller than that explored by atomic parity violation experiments. Future observation of neutrinos in the next generation of dark matter direct detection experiments have therefore the potential to provide accurate tests of the Standard Model weak interactions in the keV-MeV regime., Comment: 8 pages, 2 figures. Included XENONnT $^8$B data. Improved analysis - the error bars on our results have increased
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- 2024
50. Hybrid-Segmentor: A Hybrid Approach to Automated Fine-Grained Crack Segmentation in Civil Infrastructure
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Goo, June Moh, Milidonis, Xenios, Artusi, Alessandro, Boehm, Jan, and Ciliberto, Carlo
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Computer Science - Computer Vision and Pattern Recognition ,Electrical Engineering and Systems Science - Signal Processing - Abstract
Detecting and segmenting cracks in infrastructure, such as roads and buildings, is crucial for safety and cost-effective maintenance. In spite of the potential of deep learning, there are challenges in achieving precise results and handling diverse crack types. With the proposed dataset and model, we aim to enhance crack detection and infrastructure maintenance. We introduce Hybrid-Segmentor, an encoder-decoder based approach that is capable of extracting both fine-grained local and global crack features. This allows the model to improve its generalization capabilities in distinguish various type of shapes, surfaces and sizes of cracks. To keep the computational performances low for practical purposes, while maintaining the high the generalization capabilities of the model, we incorporate a self-attention model at the encoder level, while reducing the complexity of the decoder component. The proposed model outperforms existing benchmark models across 5 quantitative metrics (accuracy 0.971, precision 0.804, recall 0.744, F1-score 0.770, and IoU score 0.630), achieving state-of-the-art status., Comment: 25 pages, 6 figures
- Published
- 2024
- Full Text
- View/download PDF
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