8,798 results on '"Andrzejewski, A."'
Search Results
2. Measurement and analysis of the $^{246}$Cm and $^{248}$Cm neutron capture cross-sections at the EAR2 of the n TOF facility
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Alcayne, V., Kimura, A., Mendoza, E., Cano-Ott, D., Aberle, O., Álvarez-Velarde, F., Amaducci, S., Andrzejewski, J., Audouin, L., Bécares, V., Babiano-Suarez, V., Bacak, M., Barbagallo, M., Bečvář, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Busso, M., Caamaño, M., Caballero-Ontanaya, L., Calviño, F., Calviani, M., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fernández-Domınguez, B., Ferrari, A., Finocchiaro, P., Furman, V., Göbel, K., Garg, R., Gawlik-Ramiega, A., Gilardoni, S., Glodariu, T., Gonçalves, I. F., González-Romero, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Kivel, N., Kokkoris, M., Kopatch, Y., Krtička, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S. J., Macina, D., Manna, A., Martınez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mazzone, A., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Ogállar, F., Oprea, A., Patronis, N., Pavlik, A., de Rada, A. Pérez, Perkowski, J., Persanti, L., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Ramos-Doval, D., Rauscher, T., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Tagliente, G., Tain, J. L., Talip, T., Tarifeño-Saldivia, A., Tassan-Got, L., Torres-Sánchez, P., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T., and Žugec, P.
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Nuclear Experiment - Abstract
The $^{246}$Cm(n,$\gamma$) and $^{248}$Cm(n,$\gamma$) cross-sections have been measured at the Experimental Area 2 (EAR2) of the n_TOF facility at CERN with three C$_6$D$_6$ detectors. This measurement is part of a collective effort to improve the capture cross-section data for Minor Actinides (MAs), which are required to estimate the production and transmutation rates of these isotopes in light water reactors and innovative reactor systems. In particular, the neutron capture in $^{246}$Cm and $^{248}$Cm open the path for the formation of other Cm isotopes and heavier elements such as Bk and Cf and the knowledge of (n,$\gamma$) cross-sections of these Cm isotopes plays an important role in the transport, transmutation and storage of the spent nuclear fuel. The reactions $^{246}$Cm(n,$\gamma$) and $^{248}$Cm(n,$\gamma$) have been the two first capture measurements analyzed at n_TOF EAR2. Until this experiment and two recent measurements performed at J-PARC, there was only one set of data of the capture cross-sections of $^{246}$Cm and $^{248}$Cm, that was obtained in 1969 in an underground nuclear explosion experiment. In the measurement at n_TOF a total of 13 resonances of $^{246}$Cm between 4 and 400 eV and 5 of $^{248}$Cm between 7 and 100 eV have been identified and fitted. The radiative kernels obtained for $^{246}$Cm are compatible with JENDL-5, but some of them are not with JENDL-4, which has been adopted by JEFF-3.3 and ENDF/B-VIII.0. The radiative kernels obtained for the first three $^{248}$Cm resonances are compatible with JENDL-5, however, the other two are not compatible with any other evaluation and are 20% and 60% larger than JENDL-5.
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- 2024
3. European Space Agency Benchmark for Anomaly Detection in Satellite Telemetry
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Kotowski, Krzysztof, Haskamp, Christoph, Andrzejewski, Jacek, Ruszczak, Bogdan, Nalepa, Jakub, Lakey, Daniel, Collins, Peter, Kolmas, Aybike, Bartesaghi, Mauro, Martinez-Heras, Jose, and De Canio, Gabriele
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Computer Science - Machine Learning ,Computer Science - Artificial Intelligence - Abstract
Machine learning has vast potential to improve anomaly detection in satellite telemetry which is a crucial task for spacecraft operations. This potential is currently hampered by a lack of comprehensible benchmarks for multivariate time series anomaly detection, especially for the challenging case of satellite telemetry. The European Space Agency Benchmark for Anomaly Detection in Satellite Telemetry (ESA-ADB) aims to address this challenge and establish a new standard in the domain. It is a result of close cooperation between spacecraft operations engineers from the European Space Agency (ESA) and machine learning experts. The newly introduced ESA Anomalies Dataset contains annotated real-life telemetry from three different ESA missions, out of which two are included in ESA-ADB. Results of typical anomaly detection algorithms assessed in our novel hierarchical evaluation pipeline show that new approaches are necessary to address operators' needs. All elements of ESA-ADB are publicly available to ensure its full reproducibility., Comment: 87 pages, 24 figures, 19 tables
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- 2024
4. Revisiting the dynamics of a charged spinning body in curved spacetime
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Andrzejewski, K.
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General Relativity and Quantum Cosmology ,High Energy Physics - Theory - Abstract
We analyze the motion of the spinning body (in the pole-dipole approximation) in the gravitational and electromagnetic fields described by the Mathisson-Papapetrou-Dixon-Souriau equations. First, we define a novel spin supplementary condition for the electromagnetic interactions which generalizes the one proposed by Ohashi-Kyrian-Semer\'ak for gravity. As a result, we get the whole family of charged spinning particle models in the curved spacetime with remarkably simple dynamics (momentum and velocity are parallel). Applying the reparametrization procedure, for a specific dipole moment, we obtain equations of motion with constant mass and gyromagnetic factor. Next, we show that these equations follows from an effective Hamiltonian formalism, previously interpreted as a classical model of the charged Dirac particle., Comment: 16 pages, no figures; comments and references added
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- 2024
5. 'Why Don't They Just Move Closer?': Adolescent Critical Consciousness Development in YPAR about Food Security
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Amy J. Anderson, Hannah Carson Baggett, Carey E. Andrzejewski, and Sean A. Forbes
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The aim of this paper is to explore high school students' critical consciousness development in the context of youth participatory action research (YPAR) focused on food security at an alternative school in Alabama. The YPAR project took place in an elective agriscience class with 10 students (Seven Black, two white, one Latino) who were in the 10th to 12th grades. Utilizing data from researcher notes, classroom observations, and archival classroom documents, we present students' YPAR project outcomes to share their research-driven solutions to food insecurity in their community. Vignettes of classroom dialogue are also constructed to illustrate moments of reflection in the YPAR context about food security. We present three "critical moments," or instances of social analysis, to illustrate how students' individual-level attributions occurred alongside teacher dialogue and student-led investigation of structural inequities in the community. Findings illustrate how students' nonlinear critical consciousness development consisted of reliance on individual-level attributions in classroom dialogue co-occurring with systems-thinking activities and other YPAR project outcomes. This paper has implications for research on the imperfect and wavering nature of adolescent critical consciousness development in YPAR.
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- 2024
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6. Frequency and Correlates of Augmentative and Alternative Communication Use in an Autistic Inpatient Sample
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Elizabeth A. DeLucia, Tyler C. McFayden, Megan Fok, Theresa M. Andrzejewski, Angela Scarpa, and Christina G. McDonnell
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Although augmentative and alternative communication (AAC) strategies are often used by autistic youth, little is known about the use of AAC in inpatient psychiatric settings. This study evaluated how demographic and clinical factors (e.g., language level, IQ) related to AAC use in a well-characterized sample of 527 autistic youth (78.7% male, mean age 12.94) who participated in the Autism Inpatient Collection. AAC use was common, with 42.5% of caregivers reporting at least one form of AAC. White children were more likely to use AAC than non-white children at the bivariate level. In regression analyses, young children were more likely to use AAC than older children. These results suggest the importance of provider training and improved equitable access to AAC.
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- 2024
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7. Outcomes by Candida spp. in the ReSTORE Phase 3 trial of rezafungin versus caspofungin for candidemia and/or invasive candidiasis.
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Locke, Jeffrey, Pillar, Chris, Castanheira, Mariana, Carvalhaes, Cecilia, Andes, David, Aram, Jalal, Andrzejewski, Christina, Bartizal, Ken, Das, Anita, Sandison, Taylor, Thompson, George, and Pappas, Peter
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Candida species ,antifungal therapy ,candidemia ,echinocandin ,invasive candidiasis ,Caspofungin ,Echinocandins ,Humans ,Antifungal Agents ,Candidemia ,Candidiasis ,Invasive ,Microbial Sensitivity Tests ,Male ,Female ,Middle Aged ,Candida ,Adult ,Aged ,Lipopeptides ,Candida albicans ,Treatment Outcome ,Candida tropicalis ,Candida glabrata - Abstract
Rezafungin is a long-acting, intravenously administered echinocandin for the treatment of candidemia and invasive candidiasis (IC). Non-inferiority of rezafungin vs caspofungin for the treatment of adults with candidemia and/or IC was demonstrated in the Phase 3 ReSTORE study based on the primary endpoints of day 14 global cure and 30-day all-cause mortality. Here, an analysis of ReSTORE data evaluating efficacy outcomes by baseline Candida species is described. Susceptibility testing was performed for Candida species using the Clinical and Laboratory Standards Institute reference broth microdilution method. There were 93 patients in the modified intent-to-treat population who received rezafungin; 94 received caspofungin. Baseline Candida species distribution was similar in the two treatment groups; C. albicans (occurring in 41.9% and 42.6% of patients in the rezafungin and caspofungin groups, respectively), C. glabrata (25.8% and 26.6%), and C. tropicalis (21.5% and 18.1%) were the most common pathogens. Rates of global cure and mycological eradication at day 14 and day 30 all-cause mortality by Candida species were comparable in the rezafungin and caspofungin treatment groups and did not appear to be impacted by minimal inhibitory concentration (MIC) values for either rezafungin or caspofungin. Two patients had baseline isolates with non-susceptible MIC values (both in the rezafungin group: one non-susceptible to rezafungin and one to caspofungin, classified as intermediate); both were candidemia-only patients in whom rezafungin treatment was successful based on the day 30 all-cause mortality endpoint. This analysis of ReSTORE demonstrated the efficacy of rezafungin for candidemia and IC in patients infected with a variety of Candida species.
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- 2024
8. Pushing the high count rate limits of scintillation detectors for challenging neutron-capture experiments
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Correa, J. Balibrea, Lerendegui-Marco, J., Babiano-Suarez, V., Domingo-Pardo, C., Ladarescu, I., Tarifeño-Saldivia, A., Alcayne, V., Cano-Ott, D., González-Romero, E., Martínez, T., Mendoza, E., de Rada, A. Pérez, del Olmo, J. Plaza, Sánchez-Caballero, A., Casanovas, A., Calviño, F., Valenta, S., Aberle, O., Altieri, S., Amaducci, S., Andrzejewski, J., Bacak, M., Beltrami, C., Bennett, S., Bernardes, A. P., Berthoumieux, E., Beyer, R., Boromiza, M., Bosnar, D., Caamaño, M., Calviani, M., Castelluccio, D. M., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Colombetti, P., Colonna, N., Camprini, P. Console, Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Cristallo, S., Dellmann, S., Di Castro, M., Di Maria, S., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fargier, S., Fernández, B., Fernández-Domínguez, B., Finocchiaro, P., Fiore, S., Furman, V., García-Infantes, F., Gawlik-Ramikega, A., Gervino, G., Gilardoni, S., Guerrero, C., Gunsing, F., Gustavino, C., Heyse, J., Hillman, W., Jenkins, D. G., Jericha, E., Junghans, A., Kadi, Y., Kaperoni, K., Kaur, G., Kimura, A., Knapová, I., Kokkoris, M., Kopatch, Y., Krtička, M., Kyritsis, N., Lederer-Woods, C., Lerner, G., Manna, A., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., Pérez-Maroto, P., Patronis, N., Pavón-Rodríguez, J. A., Pellegriti, M. G., Perkowski, J., Petrone, C., Pirovano, E., Pomp, S., Porras, I., Praena, J., Quesada, J. M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sabaté-Gilarte, M., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N. V., Stamati, M. E., Sturniolo, A., Tagliente, G., Tarrío, D., Torres-Sánchez, P., Vagena, E., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T., Zarrella, R., and Žugec, P.
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Physics - Instrumentation and Detectors ,Nuclear Experiment - Abstract
One of the critical aspects for the accurate determination of neutron capture cross sections when combining time-of-flight and total energy detector techniques is the characterization and control of systematic uncertainties associated to the measuring devices. In this work we explore the most conspicuous effects associated to harsh count rate conditions: dead-time and pile-up effects. Both effects, when not properly treated, can lead to large systematic uncertainties and bias in the determination of neutron cross sections. In the majority of neutron capture measurements carried out at the CERN n\_TOF facility, the detectors of choice are the C$_{6}$D$_{6}$ liquid-based either in form of large-volume cells or recently commissioned sTED detector array, consisting of much smaller-volume modules. To account for the aforementioned effects, we introduce a Monte Carlo model for these detectors mimicking harsh count rate conditions similar to those happening at the CERN n\_TOF 20~m fligth path vertical measuring station. The model parameters are extracted by comparison with the experimental data taken at the same facility during 2022 experimental campaign. We propose a novel methodology to consider both, dead-time and pile-up effects simultaneously for these fast detectors and check the applicability to experimental data from $^{197}$Au($n$,$\gamma$), including the saturated 4.9~eV resonance which is an important component of normalization for neutron cross section measurements.
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- 2023
9. Autism Screening Practices in Preschools and Early Childcare Centers: A Systematic Review
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Elizabeth A. DeLucia, Janey Dike, Theresa M. Andrzejewski, and Christina G. McDonnell
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Average age of autism diagnosis exceeds four years (Maenner et al., 2020), delaying access to services and limiting early developmental research (Zwaigenbaum et al., 2015; Fletcher-Watson et al., 2017). Autism screening in early childhood settings may be a tool for enabling earlier, equitable diagnosis. This systematic review investigated the landscape of autism screening in preschools/childcare centers. Thirty-one studies were identified (7 studies on classroom observations; 22 on teacher-report questionnaires, 2 others). Questionnaires completed by early childcare staff and observational screening methods administered directly in early childcare settings showed evidence of reliability and validity. Many approaches provided information not gleaned from other reports and corresponded well with diagnostic decisions. Implications for future research are discussed.
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- 2024
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10. Frequency and correlates of augmentative and alternative communication use in an autistic inpatient sample
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DeLucia, Elizabeth A., McFayden, Tyler C., Fok, Megan, Andrzejewski, Theresa M., Scarpa, Angela, and McDonnell, Christina G.
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- 2024
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11. Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-Velocity Characterization
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Wu, Zexuan, Dong, Subo, Yi, Tuan, Liu, Zhuokai, El-Badry, Kareem, Gould, Andrew, Wyrzykowski, L., Rybicki, K. A., Bachelet, Etienne, Christie, Grant W., de Almeida, L., Monard, L. A. G., McCormick, J., Natusch, Tim, Zielinski, P., Chen, Huiling, Huang, Yang, Liu, Chang, Merand, A., Mroz, Przemek, Shangguan, Jinyi, Udalski, Andrzej, Woillez, J., Zhang, Huawei, Hambsch, Franz-Josef, Mikolajczyk, P. J., Gromadzki, M., Ratajczak, M., Kruszynska, Katarzyna, Ihanec, N., Pylypenko, Uliana, Sitek, M., Howil, K., Zola, Staszek, Michniewicz, Olga, Zejmo, Michal, Lewis, Fraser, Bronikowski, Mateusz, Potter, Stephen, Andrzejewski, Jan, Merc, Jaroslav, Street, Rachel, Fukui, Akihiko, Jaimes, R. Figuera, Bozza, V., Rota, P., Cassan, A., Dominik, M., Tsapras, Y., Hundertmark, M., Wambsganss, J., Bakowska, K., and Slowikowska, A.
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Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - Solar and Stellar Astrophysics - Abstract
We report discovering an exoplanet from following up a microlensing event alerted by Gaia. The event Gaia22dkv is toward a disk source rather than the traditional bulge microlensing fields. Our primary analysis yields a Jovian planet with M_p = 0.59^{+0.15}_{-0.05} M_J at a projected orbital separation r_perp = 1.4^{+0.8}_{-0.3} AU, and the host is a ~1.1 M_sun turnoff star at ~1.3 kpc. At r'~14, the host is far brighter than any previously discovered microlensing planet host, opening up the opportunity of testing the microlensing model with radial velocity (RV) observations. RV data can be used to measure the planet's orbital period and eccentricity, and they also enable searching for inner planets of the microlensing cold Jupiter, as expected from the ''inner-outer correlation'' inferred from Kepler and RV discoveries. Furthermore, we show that Gaia astrometric microlensing will not only allow precise measurements of its angular Einstein radius theta_E, but also directly measure the microlens parallax vector and unambiguously break a geometric light-curve degeneracy, leading to definitive characterization of the lens system., Comment: Accepted by AJ
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- 2023
12. Evolution of capacity of entanglement and modular entropy in harmonic chains and scalar fields
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Andrzejewski, K.
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High Energy Physics - Theory - Abstract
We examine the temporal evolution of the modular entropy and capacity (in particular, the fluctuation of the entanglement entropy) for systems of time-dependent oscillators coupled by a (time-dependent) parameter. Such models, through the discretization procedure, fit into field theory problems arising from quench phenomena or non-static spacetimes. First, we compare the dynamics of the modular and Renyi entropies and derive the form of the modular capacity for the single time-dependent oscillator as well as chains with bipartite decompositions. In the latter case we analyse distinguished periodicities during the evolution and the role of various boundary conditions. Next, we focus on the dynamics of the capacity (fluctuation) of entanglement. We compare the results obtained with the predictions of quasiparticles models; in particular, we obtain a theoretical value of the initial slope of the capacity for abrupt quenches. We study also continuous protocols with the frequency that vanishes at plus (and minus) infinity, including a model in which the frequency tends to the Dirac delta. All the above issues are discussed with the emphasis on the analytical methods., Comment: 33 pages. References with comments added. Published version
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- 2023
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13. Determinants of HIV Pre-Exposure Prophylaxis (PrEP) Retention among Transgender Women: A Sequential, Explanatory Mixed Methods Study
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Andrzejewski, Jack, Pines, Heather A, Morris, Sheldon, Burke, Leah, Bolan, Robert, Sevelius, Jae, Moore, David J, and Blumenthal, Jill
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Biomedical and Clinical Sciences ,Clinical Sciences ,Health Sciences ,Clinical Trials and Supportive Activities ,Pediatric ,Mental Health ,Behavioral and Social Science ,Prevention ,Pediatric AIDS ,Clinical Research ,HIV/AIDS ,Infectious Diseases ,Sexual and Gender Minorities (SGM/LGBT*) ,Good Health and Well Being ,Humans ,Female ,HIV Infections ,Transgender Persons ,Anti-HIV Agents ,Pre-Exposure Prophylaxis ,Transsexualism ,HIV ,PrEP ,gender affirmation ,sex work ,substance use ,transgender women ,Toxicology - Abstract
Transgender women (TW) face inequities in HIV and unique barriers to PrEP, an effective biomedical intervention to prevent HIV acquisition. To improve PrEP retention among TW, we examined factors related to retention using a two-phase, sequential explanatory mixed methods approach. In Phase I, we used data from a trial of 170 TW who were provided oral PrEP to examine predictors of 24-week retention. In Phase II, we conducted 15 in-depth interviews with PrEP-experienced TW and used thematic analysis to explain Phase I findings. In Phase I, more participants who were not retained at 24 weeks reported sex work engagement (18% versus 7%) and substantial/severe drug use (18% versus 8%). In Phase II, participants reported drug use as a barrier to PrEP, often in the context of sex work, and we identified two subcategories of sex work. TW engaged in "non-survival sex work" had little difficulty staying on PrEP, while those engaged in "survival sex work" struggled to stay on PrEP. In Phase I, fewer participants not retained at 24 weeks reported gender-affirming hormone therapy (GAHT) use (56% versus 71%). In Phase II, participants prioritized medical gender affirmation services over PrEP but also described the bidirectional benefits of accessing GAHT and PrEP. TW who engaged in "survival sex work" experience barriers to PrEP retention (e.g., unstable housing, drug use) and may require additional support to stay in PrEP care.
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- 2024
14. O dwóch naczyniach ceramicznych z badań archeologicznych na Kujawach
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Aldona Andrzejewska and Aleksander Andrzejewski
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archeologia ,dwory ,kultura materialna ,naczynia ceramiczne ,ornamentyka naczyniowa ,Ethnology. Social and cultural anthropology ,GN301-674 ,Folklore ,GR1-950 - Abstract
Na terenie Kujaw w miejscowościach Janiszewo, gm. Lubraniec, oraz Stawiec, gm. Lubanie, przeprowadzono archeologiczne badania wykopaliskowe dworów, po których nie pozostał żaden relikt na powierzchni ziemi. Najprawdopodobniej w XVIII w. oba popadły w ruinę, a miejsca ich lokalizacji stały się gruntami ornymi, uprawianymi do dzisiaj. Z zabudowań fazy nowożytnej pochodzą znaleziska dwóch ceramicznych dzbanów. Zabytki te stanowią wyjątkowy przykład dawnego rzemiosła ze względu na motywy zdobnicze, jakimi pokryto powierzchnię naczyń. Dzban z Janiszewa mieści wyjątkowy „podpis” wytwórcy w postaci schematycznie namalowanego farbą angobową wyposażenia warsztatu garncarskiego. Składa się nań rysunek sponowego koła garncarskiego wraz z ustawionym nań dzbanem oraz umieszczonych powyżej, zawieszonych zapewne na ścianie, drewnianych matryc do formowania płyt kafli piecowych. Naczynie ze Stawca ozdobione zostało rytym ornamentem oraz powłoką zielonej polewy. Rysunek przedstawia trzy winne krzewy obwieszone dorodnymi gronami, wśród których znajduje się kilka małych ptaków zjadających owoce oraz dwa znacznie większe ptaki. To sowa i ptak z rodziny kurowatych (głuszec?). Dzban na wino z takim zdobieniem nie tylko miał walory estetyczne. Przedstawiona na nim narracja mogła mieć kilka znaczeń kierowanych do amatorów nalewanego trunku.
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- 2024
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15. Note on the Margolus-Levitin quantum speed limit for arbitrary fidelity
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Andrzejewski, Krzysztof, Bolonek-Lasoń, Katarzyna, and Kosiński, Piotr
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Quantum Physics - Abstract
For vanishing fidelity between initial and final states two important quantum speed limits, the Mandelstam-Tamm limit (involving energy dispersion) and Margolus-Levitin one (involving excitation energy expectation value) have been derived. While the generalization of the former limit to the case of arbitrary fidelity is straightforward, the relevant generalization of the latter, given in the seminal paper by Giovanetti et al (Phys. Rev. A67 (2003), 052109) was based on the conjectured equality of lower and upper bounds on the right hand side of generalized Margolus-Levitin inequality, verified numerically up to seven digits. Only recently there appear two proofs of the conjecture. We provide below a very elementary new proof, based on the simplest tools from differential calculus. Thus the generalized Margolus-Levitin speed limit can be derived much in the spirit of the original one valid for vanishing fidelity., Comment: 14 pages, 8 figures, substantially revised according to the suggestions of the referees, published version
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- 2023
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16. The Gaia alerted fading of the FUor-type star Gaia21elv
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Nagy, Zsófia, Park, Sunkyung, Ábrahám, Péter, Kóspál, Ágnes, de Miera, Fernando Cruz-Sáenz, Kun, Mária, Siwak, Michał, Szabó, Zsófia Marianna, Szilágyi, Máté, Fiorellino, Eleonora, Giannini, Teresa, Lee, Jae-Joon, Lee, Jeong-Eun, Marton, Gábor, Szabados, László, Vitali, Fabrizio, Andrzejewski, Jan, Gromadzki, Mariusz, Hodgkin, Simon, Jabłońska, Maja, Mendez, Rene A., Merc, Jaroslav, Michniewicz, Olga, Mikołajczyk, Przemysław J., Pylypenko, Uliana, Ratajczak, Milena, Wyrzykowski, Łukasz, Zejmo, Michal, and Zieliński, Paweł
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
FU Orionis objects (FUors) are eruptive young stars, which exhibit outbursts that last from decades to a century. Due to the duration of their outbursts, and to the fact that only about two dozens of such sources are known, information on the end of their outbursts is limited. Here we analyse follow-up photometry and spectroscopy of Gaia21elv, a young stellar object, which had a several decades long outburst. It was reported as a Gaia science alert due to its recent fading by more than a magnitude. To study the fading of the source and look for signatures characteristic of FUors, we have obtained follow-up near infrared (NIR) spectra using Gemini South/IGRINS, and both optical and NIR spectra using VLT/X-SHOOTER. The spectra at both epochs show typical FUor signatures, such as a triangular shaped $H$-band continuum, absorption-line dominated spectrum, and P Cygni profiles. In addition to the typical FUor signatures, [OI], [FeII], and [SII] were detected, suggesting the presence of a jet or disk wind. Fitting the spectral energy distributions with an accretion disc model suggests a decrease of the accretion rate between the brightest and faintest states. The rapid fading of the source in 2021 was most likely dominated by an increase of circumstellar extinction. The spectroscopy presented here confirms that Gaia21elv is a classical FUor, the third such object discovered among the Gaia science alerts., Comment: Accepted to MNRAS
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- 2023
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17. Various disguises of the Pais-Uhlenbeck oscillator
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Elbistan, Mahmut and Andrzejewski, Krzysztof
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High Energy Physics - Theory ,General Relativity and Quantum Cosmology ,Mathematical Physics - Abstract
Beginning with a simple set of planar equations, we discuss novel realizations of the Pais-Uhlenbeck oscillator in various contexts. First, due to the bi-Hamiltonian character of this model, we develop a Hamiltonian approach for the Eisenhart-Duval lift of the related dynamics. We apply this approach to the previously worked example of a circularly polarized periodic gravitational wave. Then, we present our further results. Firstly, we show that the transverse dynamics of the Lukash plane wave and a complete gravitational wave pulse can also lead to the Pais-Uhlenbeck oscillator. We express the related Carroll Killing vectors in terms of the Pais-Uhlenbeck frequencies and derive extra integrals of motion from the conformal Newton-Hooke symmetry. In addition, we find that the 3+1 dimensional Penning trap can be canonically mapped to the 6th order Pais-Uhlenbeck oscillator. We also carry the problem to the non-commutative plane. Lastly, we discuss other examples like the motion of a charged particle under electromagnetic field created with double copy., Comment: published version, 27 pages, no figures
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- 2023
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18. In which rounds were the most rotations of key players made, and how did this affect physical activity? Analysis of the eight best teams of the 2018 FIFA world cup Russia
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Chmura, Paweł, Kołodziejczyk, Michał, Andrzejewski, Marcin, Chmura, Jan, Rokita, Andrzej, Drożdżowski, Adrian, Maćkała, Krzysztof, and Konefał, Marek
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- 2024
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19. Autism Screening Practices in Preschools and Early Childcare Centers: A Systematic Review
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DeLucia, Elizabeth A., Dike, Janey, Andrzejewski, Theresa M., and McDonnell, Christina G.
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- 2024
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20. A Systematic Review of Sexual Violence among Autistic Individuals
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Janey E. Dike, Elizabeth A. DeLucia, Olivia Semones, Theresa Andrzejewski, and Christina G. McDonnell
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This study systematically reviewed the sexual violence literature among autistic individuals by identifying prevalence rates, assessment approaches, and outcomes of sexual violence exposure, as well as risk and protective factors. Overall, 22 articles met inclusion criteria. Nine studies reported elevated rates of sexual violence in autistic samples as compared to non-autistic peers, particularly with regard to adult victimization. Evidence emerged for increased risk among autistic girls and women. Results suggest autistic individuals experience similar trauma outcomes to non-autistic peers, though risk factors specific to autistic groups emerged. Further research is needed to capture more diverse samples among autistic populations and to assess for trauma outcomes and interventions to address sexual violence.
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- 2023
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21. Note on the Margolus–Levitin quantum speed limit for arbitrary fidelity
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Andrzejewski, Krzysztof, Bolonek-Lasoń, Katarzyna, and Kosiński, Piotr
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- 2024
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22. First measurement of the $^{94}$Nb($n$,$\gamma$) cross section at the CERN n\_TOF facility
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Balibrea-Correa, J., Babiano-Suarez, V., Lerendegui-Marco, J., Domingo-Pardo, C., Ladarescu, I., Tarifeño-Saldivia, A., Alcayne, V., Cano-Ott, D., González-Romero, E., Martínez, T., Mendoza, E., Plaza, J., Sánchez-Caballero, A., Calviño, F., Casanovas, A., Guerrero, C., Heinitz, S., Köster, U., Maugeri, E. A., Dressler, R., Schumann, D., Mönch, I., Cristallo, S., Lederer-Woods, C., Aberle, O., Altieri, S., Amaducci, S., Andrzejewski, J., Bacak, M., Beltrami, C., Bennett, S., Bernardes, A. P., Berthoumieux, E., Boromiza, M., Bosnar, D., Caamaño, M., Calviani, M., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Colombetti, P., Colonna, N., Camprini, P. Console, Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Dellmann, S., Di Castro, M., Di Maria, S., Diakaki, M., Dietz, M., Dupont, E., Durán, I., Eleme, Z., Fargier, S., Fernández, B., Fernández-Domínguez, B., Finocchiaro, P., Fiore, S., Furman, V., García-Infantes, F., Gawlik-Ramięga, A., Gervino, G., Gilardoni, S., Gunsing, F., Gustavino, C., Heyse, J., Hillman, W., Jenkins, D. G., Jericha, E., Junghans, A., Kadi, Y., Kaperoni, K., Kaur, G., Kimura, A., Knapová, I., Kokkoris, M., Kopatch, Y., Krtička, M., Kyritsis, N., Lerner, G., Manna, A., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Mazzone, A., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., de Rada, A. Pérez, Pérez-Maroto, P., Patronis, N., Pavón-Rodríguez, J. A., Pellegriti, M. G., Perkowski, J., Petrone, C., Pirovano, E., Pomp, S., Porras, I., Praena, J., Quesada, J. M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sabaté-Gilarte, M., Schillebeeckx, P., Sekhar, A., Smith, A. G., Sosnin, N. V., Stamati, M. E., Sturniolo, A., Tagliente, G., Tarrío, D., Torres-Sánchez, P., Urlass, S., Vagena, E., Valenta, S., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, T., Woods, P. J., Wright, T., Zarrella, R., Žugec, P., and Collaboration, the n_TOF
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Nuclear Experiment - Abstract
One of the crucial ingredients for the improvement of stellar models is the accurate knowledge of neutron capture cross-sections for the different isotopes involved in the $s$-,$r$- and $i$- processes. These measurements can shed light on existing discrepancies between observed and predicted isotopic abundances and help to constrain the physical conditions where these reactions take place along different stages of stellar evolution.In the particular case of the radioactive $^{94}$Nb, the $^{94}$Nb($n$,$\gamma$) cross-section could play a role in the determination of the $s$-process production of $^{94}$Mo in AGB stars, which presently cannot be reproduced by state-of-the-art stellar models. There are no previous $^{94}$Nb($n$,$\gamma$) experimental data for the resolved and unresolved resonance regions mainly due to the difficulties in producing high-quality samples and also due to limitations in conventional detection systems commonly used in time-of-flight experiments.Motivated by this situation, a first measurement of the $^{94}$Nb($n$,$\gamma$) reaction was carried out at CERN n\_TOF, thereby exploiting the high luminosity of the EAR2 area in combination with a new detection system of small-volume C6D6-detectors and a high quality $^{94}$Nb-sample. The latter was based on hyper-pure $^{93}$Nb material activated at the high-flux reactor of ILL-Grenoble. An innovative ring-configuration detection system in close geometry around the capture sample allowed us to significantly enhance the signal-to-background ratio. This set-up was supplemented with two conventional C$_{6}$D$_{6}$ detectors and a high-resolution LaCl$_{3}$(Ce)-detector, which will be employed for addressing reliably systematic effects and uncertainties.At the current status of the data analysis, 18 resonance in $^{94}$Nb+$n$ have been observed for the first time in the neutron energy range from thermal up to 10 keV., Comment: NPA-X conference proceeding
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- 2023
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23. Measurement of the $^{14}$N(n,p)$^{14}$C cross section at the CERN n_TOF facility from sub-thermal energy to 800 keV
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Torres-Sánchez, P., Praena, J., Porras, I., Sabaté-Gilarte, M., Lederer-Woods, C., Aberle, O., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Bécares, V., Babiano-Suarez, V., Bacak, M., Barbagallo, M., Bečvář, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Busso, M., Caamaño, M., Caballero, L., Calviño, F., Calviani, M., Cano-Ott, D., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fernández-Domínguez, B., Ferrari, A., Ferrer, F. J., Finocchiaro, P., Furman, V., Göbel, K., Garg, R., Gawlik-Ramięga, A., Geslot, B., Gilardoni, S., Glodariu, T., Gonçalves, I. F., González-Romero, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Kimura, A., Kivel, N., Kokkoris, M., Kopatch, Y., Krtička, M., Kurtulgil, D., Ladarescu, I., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S. J., Macina, D., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Ogállar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Piersanti, L., Quesada, J. M., Radeck, D., Ramos-Doval, D., Rauscher, T., Reifarth, R., Rochman, D., Rubbia, C., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Tagliente, G., Tain, J. L., Talip, T., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T., and Žugec, P.
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Nuclear Experiment - Abstract
Background: The $^{14}$N(n,p)$^{14}$C reaction is of interest in neutron capture therapy, where nitrogen-related dose is the main component due to low-energy neutrons, and in astrophysics, where 14N acts as a neutron poison in the s-process. Several discrepancies remain between the existing data obtained in partial energy ranges: thermal energy, keV region and resonance region. Purpose: Measuring the 14N(n,p)14C cross section from thermal to the resonance region in a single measurement for the first time, including characterization of the first resonances, and providing calculations of Maxwellian averaged cross sections (MACS). Method: Time-of-flight technique. Experimental Area 2 (EAR-2) of the neutron time-of-flight (n_TOF) facility at CERN. $^{10}$B(n,${\alpha}$)$^7$Li and $^{235}$U(n,f) reactions as references. Two detection systems running simultaneously, one on-beam and another off-beam. Description of the resonances with the R-matrix code sammy. Results: The cross section has been measured from sub-thermal energy to 800 keV resolving the two first resonances (at 492.7 and 644 keV). A thermal cross-section (1.809$\pm$0.045 b) lower than the two most recent measurements by slightly more than one standard deviation, but in line with the ENDF/B-VIII.0 and JEFF-3.3 evaluations has been obtained. A 1/v energy dependence of the cross section has been confirmed up to tens of keV neutron energy. The low energy tail of the first resonance at 492.7 keV is lower than suggested by evaluated values, while the overall resonance strength agrees with evaluations. Conclusions: Our measurement has allowed to determine the $^{14}$N(n,p) cross-section over a wide energy range for the first time. We have obtained cross-sections with high accuracy (2.5 %) from sub-thermal energy to 800 keV and used these data to calculate the MACS for kT = 5 to kT = 100 keV., Comment: 18 pages, 15 figures, 4 tables
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- 2022
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24. Building a Monitoring System
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Chmura, Paweł, Konefał, Marek, Andrzejewski, Marcin, Jaspers, Arne, Oliva Lozano, José M., editor, and Ardigò, Luca P., editor
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- 2024
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25. Training Load Parameters in Soccer
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Andrzejewski, Marcin, Konefał, Marek, Beato, Marco, Chmura, Paweł, Oliva Lozano, José M., editor, and Ardigò, Luca P., editor
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- 2024
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26. Product-Service System Design - A Case Study for Parking Furniture Industry
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Salwin, Mariusz, Kraslawski, Andrzej, Andrzejewski, Michał, Hryniewicka, Magdalena, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Haddar, Mohamed, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Kwon, Young W., Editorial Board Member, Tolio, Tullio A. M., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Schmitt, Robert, Editorial Board Member, Xu, Jinyang, Editorial Board Member, Hamrol, Adam, editor, Grabowska, Marta, editor, and Hinz, Marcin, editor
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- 2024
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27. Preparation and Evaluation of the Properties of FDM Printed Materials Made from Waste-Origin Polymers
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Cudnik, Igor, Andrzejewski, Jacek, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Haddar, Mohamed, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Kwon, Young W., Editorial Board Member, Tolio, Tullio A. M., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Schmitt, Robert, Editorial Board Member, Xu, Jinyang, Editorial Board Member, Gapiński, Bartosz, editor, Ciszak, Olaf, editor, and Machado, Jose Mendes, editor
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- 2024
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28. Riverine Landscapes
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Andrzejewski, Leon, Krzemień, Kazimierz, Zwoliński, Zbigniew, Migoń, Piotr, Series Editor, and Jancewicz, Kacper, editor
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- 2024
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29. The CERN n TOF NEAR station for astrophysics- and application-related neutron activation measurements
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Patronis, N., Mengoni, A., Colonna, N., Cecchetto, M., Domingo-Pardo, C., Aberle, O., Lerendegui-Marco, J., Gervino, G., Stamati, M. E., Goula, S., Bernardes, A. P., Mastromarco, M., Manna, A., Vlastou, R., Massimi, C., Calviani, M., Alcayne, V., Altieri, S., Amaducci, S., Andrzejewski, J., Babiano-Suarez, V., Bacak, M., Balibrea, J., Beltrami, C., Bennett, S., Berthoumieux, E., Boromiza, M., Bosnar, D., Caamano, M., Calvino, F., Cano-Ott, D., Casanovas, A., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Colombetti, P., Camprini, P. Console, Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Dellmann, S., Di Castro, M., Di Maria, S., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Duran, I., Eleme, Z., Fargier, S., Fernandez, B., Fernandez-Dominguez, B., Finocchiaro, P., Fiore, S., Furman, V., Garcia-Infantes, F., Gawlik-Ramiega, A., Gilardoni, S., Gonzalez-Romero, E., Guerrero, C., Gunsing, F., Gustavino, C., Heyse, J., Hillman, W., Jenkins, D. G., Jericha, E., Junghans, A., Kadi, Y., Kaperoni, K., Kaur, G., Kimura, A., Knapova, I., Kokkoris, M., Kopatch, Y., Krticka, M., Kyritsis, N., Ladarescu, I., Lederer-Woods, C., Lerner, G., Martınez, T., Masi, A., Mastinu, P., Maugeri, E. A., Mazzone, A., Mendoza, E., Milazzo, P. M., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., de Rada, A. Perez, Perez-Maroto, P., Pavon-Rodrıguez, J. A., Pellegriti, M. G., Perkowski, J., Petrone, C., Pirovano, E., Plaza, J., Pomp, S., Porras, I., Praena, J., Quesada, J. M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sanchez, A., Sabate-Gilarte, M., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N. V., Sturniolo, A., Tagliente, G., Tarrio, D., Torres-Sanchez, P., Urlass, S., Vagena, E., Valenta, S., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Wallner, T., Woods, P. J., Wright, T., Zarrella, R., and Zugec, P.
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Physics - Instrumentation and Detectors ,Astrophysics - Instrumentation and Methods for Astrophysics ,Nuclear Experiment - Abstract
A new experimental area, the NEAR station, has recently been built at the CERN n TOF facility, at a short distance from the spallation target (1.5 m). The new area, characterized by a neutron beam of very high flux, has been designed with the purpose of performing activation measurements of interest for astrophysics and various applications. The beam is transported from the spallation target to the NEAR station through a hole in the shielding wall of the target, inside which a collimator is inserted. The new area is complemented with a {\gamma}-ray spectroscopy laboratory, the GEAR station, equipped with a high efficiency HPGe detector, for the measurement of the activity resulting from irradiation of a sample in the NEAR station. The use of a moderator/filter assembly is envisaged, in order to produce a neutron beam of Maxwellian shape at different thermal energies, necessary for the measurement of Maxwellian Averaged Cross Sections of astrophysical interest. A new fast-cycling activation technique is also being investigated, for measurements of reactions leading to isotopes of very short half life.
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- 2022
30. Advances and new ideas for neutron-capture astrophysics experiments at CERN n_TOF
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Domingo-Pardo, C., Babiano-Suarez, V., Balibrea-Correa, J., Caballero, L., Ladarescu, I., Lerendegui-Marco, J., Tain, J. L., Tarifeño-Saldivia, A., Aberle, O., Alcayne, V., Altieri, S., Amaducci, S., Andrzejewski, J., Bacak, M., Beltrami, C., Bennett, S., Bernardes, A. P., Berthoumieux, E., Boromiza, M., Bosnar, D., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Casanovas, A., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Chiera, N. M., Colombetti, P., Colonna, N., Camprini, P. Console, Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Cristallo, S., Dellmann, S., Di Castro, M., Di Maria, S., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fargier, S., Fernández, B., Fernández-Domínguez, B., Finocchiaro, P., Fiore, S., Furman, V., García-Infantes, F., Gawlik-Ramiega, A., Gervino, G., Gilardoni, S., González-Romero, E., Guerrero, C., Gunsing, F., Gustavino0, C., Heyse, J., Hillman, W., Jenkins, D. G., Jericha, E., Junghans, A., Kadi, Y., Kaperoni, K., Käppeler, F., Kaur, G., Kimura, A., Knapová, I., Koester, U., Kokkoris, M., Kopatch, Y., Krtička, M., Kyritsis, N., Lederer-Woods, C., Lerner, G., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mönch, I., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., de Rada, A. Pérez, Pérez-Maroto, P., Patronis, N., Pavón-Rodríguez, J. A., Pellegriti, M. G., Perkowski, J., Petrone, C., Pirovano, E., Plaza, J., Pomp, S., Porras, I., Praena, J., Quesada, J. M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sánchez, A., Sabaté-Gilarte, M., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N. V., Stamati, M., Sturniolo, A., Tagliente, G., Tarrío, D., Torres-Sánchez, P., Turko, J., Urlass, S., Vagena, E., Valenta, S., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, T., Woods, P. J., Wright, T., Zarrella, R., and Žugec, P.
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Nuclear Experiment - Abstract
This article presents a few selected developments and future ideas related to the measurement of $(n,\gamma)$ data of astrophysical interest at CERN n_TOF. The MC-aided analysis methodology for the use of low-efficiency radiation detectors in time-of-flight neutron-capture measurements is discussed, with particular emphasis on the systematic accuracy. Several recent instrumental advances are also presented, such as the development of total-energy detectors with $\gamma$-ray imaging capability for background suppression, and the development of an array of small-volume organic scintillators aimed at exploiting the high instantaneous neutron-flux of EAR2. Finally, astrophysics prospects related to the intermediate $i$ neutron-capture process of nucleosynthesis are discussed in the context of the new NEAR activation area., Comment: preprint submitted to the European Physical Journal A, 11 pages, 4 figures
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- 2022
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31. Adverse Childhood Experiences in Autistic Children and Their Caregivers: Examining Intergenerational Continuity
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Andrzejewski, Theresa, DeLucia, Elizabeth A., Semones, Olivia, Khan, Sanaa, and McDonnell, Christina G.
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Although there is an urgent need to develop trauma-informed services for autistic youth, little research has evaluated adverse childhood experiences (ACEs) in autistic youth from an intergenerational perspective. 242 caregivers of autistic (n = 117) and non-autistic (n = 125) youth reported on ACEs that they experienced in their own childhoods and ACEs experienced by their children, as well as measures of depression, stress, and child autistic traits and behavioral concerns. Autistic youth and their caregivers both experienced significantly higher rates of ACEs than the non-autistic dyads. Intergenerational continuity, the association between caregiver and child ACEs, was significantly stronger for autistic youth. ACEs showed differential patterns of associations with parent depressive symptoms and child autistic traits across groups.
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- 2023
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32. Delayed surgical treatment of Pipkin type II fracture in a patient with infection COVID-19. A case report
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Jan Poszepczyński, Krzysztof Andrzejewski, Jędrzej Lesman, and Marcin Edward Domżalski
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Pipkin type II fracture ,continuous passive motion splint (CPM) ,hyperbaric chamber ,COVID-19 ,Orthopedic surgery ,RD701-811 - Abstract
A 25-year-old man with a hip dislocation and Pipkin II type femoral head fracture, whose surgical treatment was postponed for 15 days due to Covid 19 pandemic, is described. For 2 months after surgery, treatment was supported by therapy in a hyperbaric chamber and with a continuous passive motion (CPM) splint. Four months after surgery, bone fusion of the femoral head fracture was achieved with its normal revascularization. Two years after the operation, the patient was moving efficiently and had no complaints of hip pain. Delayed open reduction and internal fixation of the femoral head fracture resulted in a very good functional and radiological outcome.
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- 2024
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33. In which rounds were the most rotations of key players made, and how did this affect physical activity? Analysis of the eight best teams of the 2018 FIFA world cup Russia
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Paweł Chmura, Michał Kołodziejczyk, Marcin Andrzejewski, Jan Chmura, Andrzej Rokita, Adrian Drożdżowski, Krzysztof Maćkała, and Marek Konefał
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Soccer ,Key players ,Match analysis ,Match performance ,Squad rotation ,Starting line-up ,Sports medicine ,RC1200-1245 - Abstract
Abstract Background Team management, especially player selection, rotation, and availability, are critical issues when dealing with the high demands of modern training and gameplay. As such, research continuously seeks ways to improve these actions or implement new ideas to gain a competitive advantage through the rotation of players in the starting line-up. The current study aimed to examine the rounds of the 2018 FIFA World Cup Russia in which the most rotations of key players were made and how this affected physical activity. Methods The sample consisted of 110 players from the top eight teams in the 2018 World Cup Russia who played entire matches for up to 90 min in seven consecutive games. All players were divided into key players (KPs, n = 58) and non-key players (NKPs, n = 52). The analysis used data collected by an advanced motion analysis system known as STATS®, with physical activity variables analyzed, including total distance covered (TDC), distance covered with high intensity over 20 km/h (HIR), and the number of sprints undertaken. In statistical analysis, differences between categories and consecutive matches were calculated using the Kruskal-Wallis H test, and if a significant effect size was found, a multiple comparisons p values test was performed. Results The best teams at the 2018 FIFA World Cup Russia used the most KP rotations with NKPs in the third match of the group stage. In addition, this was even more visible among more successful teams than less successful teams. The rotation strategy among the best eight teams allowed them to maintain the physical activity of KPs and NKPs in all rounds of the tournament. Conclusions Coaches and coaching staff should incorporate squad rotation that includes a large group of players in their team management to improve their success. Team management expertise in player rotation during matches played over congested schedules at top tournaments maintains high levels of physical activity indicators (TDC, HIR, and sprints).
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- 2024
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34. Quality versus speed in energy demand prediction for district heating systems
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Andrzejewski, Witold, Potoniec, Jedrzej, Drozdowski, Maciej, Stefanowski, Jerzy, Wrembel, Robert, and Stapf, Paweł
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Computer Science - Machine Learning ,Computer Science - Artificial Intelligence ,Electrical Engineering and Systems Science - Systems and Control - Abstract
In this paper, we consider energy demand prediction in district heating systems. Effective energy demand prediction is essential in combined heat power systems when offering electrical energy in competitive electricity markets. To address this problem, we propose two sets of algorithms: (1) a novel extension to the algorithm proposed by E. Dotzauer and (2) an autoregressive predictor based on hour-of-week adjusted linear regression on moving averages of energy consumption. These two methods are compared against state-of-the-art artificial neural networks. Energy demand predictor algorithms have various computational costs and prediction quality. While prediction quality is a widely used measure of predictor superiority, computational costs are less frequently analyzed and their impact is not so extensively studied. When predictor algorithms are constantly updated using new data, some computationally expensive forecasting methods may become inapplicable. The computational costs can be split into training and execution parts. The execution part is the cost paid when the already trained algorithm is applied to predict something. In this paper, we evaluate the above methods with respect to the quality and computational costs, both in the training and in the execution. The comparison is conducted on a real-world dataset from a district heating system in the northwest part of Poland.
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- 2022
35. Measurement of the prompt fission γ235-rays from slow neutron-induced fission of γ235U with STEFF
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Wright, T., Smith, A. G., Sosnin, N. V., Bennett, S. A., Davies, P. J., Popescu, A. V., Ryan, J. A., Sekhar, A., Warren, S., Aberle, O., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Bečvář, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A. R., Gawlik-Ramięga, A., Gilardoni, S., Glodariu, T., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer-Woods, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S. J., Macina, D., Manna, A., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rauscher, T., Reifarth, R., Rubbia, C., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sedyshev, P., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Weiss, C., Woods, P. J., and Žugec, P.
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- 2024
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36. Product-Service System Design - A Case Study for Parking Furniture Industry
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Salwin, Mariusz, primary, Kraslawski, Andrzej, additional, Andrzejewski, Michał, additional, and Hryniewicka, Magdalena, additional
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- 2024
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37. Preparation and Evaluation of the Properties of FDM Printed Materials Made from Waste-Origin Polymers
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Cudnik, Igor, primary and Andrzejewski, Jacek, additional
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- 2024
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- View/download PDF
38. Comparative analysis: CapEx in diamond mining versus diamond growing, based on open data sources and experimental results
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Vladislav Zhdanov, Lukasz Andrzejewski, Julia Bondareva, and Stanislav Evlashin
- Subjects
CapEx ,Diamond mining ,HPHT ,CVD ,Lab-grown diamonds ,Diamond production trends ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
The diamond industry has long been associated with environmental and social problems, ranging from mining practices to ethical concerns related to diamond sourcing. In recent years, there has been a growing interest in lab-grown diamonds as a sustainable alternative for diamond consumers. However, the production of lab-grown diamonds has own challenges. This article examines the capital expenditures per annualized carat of rough diamonds obtained through mining and two fabrication methods: high-pressure high-temperature (HPHT) and microwave plasma-assisted chemical vapour deposition (MP CVD). Lab-grown diamonds produced using HPHT and MP CVD methods require significantly higher capital expenditures per annualized carat compare to mined diamonds. HPHT diamonds require on-time CapEx of 500–833 US$ per carat annually, while MP CVD diamonds demand 549–1648 US$ per carat annually. Finding ways to reduce production cost and increase efficiency will be crucial in realizing the potential of lab-grown diamonds as a sustainable alternative to mined diamonds.
- Published
- 2024
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- View/download PDF
39. Machine learning based event classification for the energy-differential measurement of the $^\text{nat}$C(n,p) and $^\text{nat}$C(n,d) reactions
- Author
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Žugec, P., Barbagallo, M., Andrzejewski, J., Perkowski, J., Colonna, N., Bosnar, D., Gawlik, A., Sabate-Gilarte, M., Bacak, M., Mingrone, F., and Chiaveri, E.
- Subjects
Physics - Data Analysis, Statistics and Probability ,Computer Science - Computer Vision and Pattern Recognition ,Nuclear Experiment - Abstract
The paper explores the feasibility of using machine learning techniques, in particular neural networks, for classification of the experimental data from the joint $^\text{nat}$C(n,p) and $^\text{nat}$C(n,d) reaction cross section measurement from the neutron time of flight facility n_TOF at CERN. Each relevant $\Delta E$-$E$ pair of strips from two segmented silicon telescopes is treated separately and afforded its own dedicated neural network. An important part of the procedure is a careful preparation of training datasets, based on the raw data from Geant4 simulations. Instead of using these raw data for the training of neural networks, we divide a relevant 3-parameter space into discrete voxels, classify each voxel according to a particle/reaction type and submit these voxels to a training procedure. The classification capabilities of the structurally optimized and trained neural networks are found to be superior to those of the manually selected cuts., Comment: 11 pages, 5 figures, 2 tables
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- 2022
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40. High accuracy, high resolution 235U(n,f) cross section from n_TOF (CERN) in the thermal to 10 keV energy range
- Author
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collaboration, n_TOF, Mastromarco, M., Amaducci, S., Colonna, N., Finocchiaro, P., Cosentino, L., Aberle, O., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Bečvář, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Cortés, G., Cortés-Giraldo, M. A., Damone, L. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Furman, V., Göbel, K., García, A. R., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S. J., Macina, D., Manna, A., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rauscher, T., Reifarth, R., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sedyshev, P., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weiss, C., Woods, P. J., Wright, T., and Žugec, P.
- Subjects
Nuclear Experiment - Abstract
The 235U(n,f) cross section was measured in a wide energy range (25 meV - 170 keV) at the n_TOF facility at CERN, relative to 6Li(n,t) and 10B(n,alpha) standard reactions, with high resolution and accuracy, with a setup based on a stack of six samples and six silicon detectors placed in the neutron beam. In this paper we report on the results in the region between thermal and 10 keV neutron energy. A resonance analysis has been performed up to 200 eV, with the code SAMMY. The resulting fission kernels are compared with the ones extracted on the basis of the resonance parameters of the most recent major evaluated data libraries. A comparison of the n_TOF data with the evaluated cross sections is also performed from thermal to 10 keV neutron energy for the energy-averaged cross section in energy groups of suitably chosen width. A good agreement is found in average between the new results and the latest evaluated data files ENDF-B/VIII and JEFF-3.3, as well as with respect to the IAEA reference files. However, some discrepancies are still present in some specific energy regions. The new dataset here presented, characterized by unprecedented resolution and accuracy, can help improving the evaluations in the Resolved Resonance Region and up to 10 keV, and reduce the uncertainties that affect this region.
- Published
- 2022
41. Multi-section fission ionization chamber for measurement of [formula omitted] reaction in fission tagging method
- Author
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Perkowski, J., Alcayne, V., Andrzejewski, J., Cano-Ott, D., Gawlik-Ramięga, A., Mendoza, E., Sánchez-Caballero, A., Sibbens, G., Vanleeuw, D., Aberle, O., Altieri, S., Amaducci, S., Babiano-Suarez, V., Bacak, M., Correa, J. Balibrea, Beltrami, C., Bennett, S., Bernardes, A.P., Berthoumieux, E., Beyer, R., Boromiza, M., Bosnar, D., Caamaño, M., Calviño, F., Calviani, M., Casanovas, A., Castelluccio, D.M., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Colombetti, P., Colonna, N., Camprini, P. Console, Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Cristallo, S., Dellmann, S., Di Castro, M., Di Maria, S., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fargier, S., Fernández, B., Fernández-Domínguez, B., Finocchiaro, P., Fiore, S., Furman, V., García-Infantes, F., Gervino, G., Gilardoni, S., González-Romero, E., Guerrero, C., Gunsing, F., Gustavino, C., Heyse, J., Hillman, W., Jenkins, D.G., Jericha, E., Junghans, A., Kadi, Y., Kaperoni, K., Kaur, G., Kimura, A., Knapová, I., Kokkoris, M., Kopatch, Y., Krtička, M., Kyritsis, N., Ladarescu, I., Lederer-Woods, C., Lerendegui-Marco, J., Lerner, G., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E.A., Mazzone, A., Mengoni, A., Michalopoulou, V., Milazzo, P.M., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., de Rada Fiol, A. Pérez, Pérez-Maroto, P., Patronis, N., Pavón-Rodríguez, J.A., Pellegriti, M.G., Petrone, C., Pirovano, E., del Olmo, J. Plaza, Pomp, S., Porras, I., Praena, J., Quesada, J.M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sabaté-Gilarte, M., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A.G., Sosnin, N.V., Stamati, M.E., Sturniolo, A., Tagliente, G., Tarifeño-Saldivia, A., Tarrío, D., Torres-Sánchez, P., Vagena, E., Valenta, S., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P.J., Wright, T., Zarrella, R., and Žugec, P.
- Published
- 2024
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42. Landscape and paleoenvironmental change in stream valleys of the Central Great Plains, North America, during Marine Isotope Stage 3 (ca. 59–27 ka)
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Layzell, Anthony L., Andrzejewski, Kate A., Mandel, Rolfe D., and Hanson, Paul R.
- Published
- 2024
- Full Text
- View/download PDF
43. Maximal Mixed-Drove Co-occurrence Patterns
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Andrzejewski, Witold and Boinski, Pawel
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- 2023
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44. A Systematic Review of Sexual Violence Among Autistic Individuals
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Dike, Janey E., DeLucia, Elizabeth A., Semones, Olivia, Andrzejewski, Theresa, and McDonnell, Christina G.
- Published
- 2023
- Full Text
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45. Differences in Health Care Experiences among Transgender and Gender Diverse Youth by Gender Identity and Race/Ethnicity
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Johns, Michelle M., Gordon, Allegra R., Andrzejewski, Jack, Harper, Christopher R., Michaels, Stuart, Hansen, Christopher, Fordyce, Erin, and Dunville, Richard
- Published
- 2023
- Full Text
- View/download PDF
46. Study of Biological Effects Induced in Solid Tumors by Shortened-Duration Thermal Ablation Using High-Intensity Focused Ultrasound
- Author
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Patrycja Maria Kaplińska-Kłosiewicz, Łukasz Fura, Tamara Kujawska, Kryspin Andrzejewski, Katarzyna Kaczyńska, Damian Strzemecki, Mikołaj Sulejczak, Stanisław J. Chrapusta, Matylda Macias, and Dorota Sulejczak
- Subjects
HIFU thermal ablation ,breast cancer model ,treatment plan ,morphology ,histology ,ultrastructure ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
The HIFU ablation technique is limited by the long duration of the procedure, which results from the large difference between the size of the HIFU beam’s focus and the tumor size. Ablation of large tumors requires treating them with a sequence of single HIFU beams, with a specific time interval in-between. The aim of this study was to evaluate the biological effects induced in a malignant solid tumor of the rat mammary gland, implanted in adult Wistar rats, during HIFU treatment according to a new ablation plan which allowed researchers to significantly shorten the duration of the procedure. We used a custom, automated, ultrasound imaging-guided HIFU ablation device. Tumors with a 1 mm thickness margin of healthy tissue were subjected to HIFU. Three days later, the animals were sacrificed, and the HIFU-treated tissues were harvested. The biological effects were studied, employing morphological, histological, immunohistochemical, and ultrastructural techniques. Massive cell death, hemorrhages, tissue loss, influx of immune cells, and induction of pro-inflammatory cytokines were observed in the HIFU-treated tumors. No damage to healthy tissues was observed in the area surrounding the safety margin. These results confirmed the efficacy of the proposed shortened duration of the HIFU ablation procedure and its potential for the treatment of solid tumors.
- Published
- 2024
- Full Text
- View/download PDF
47. The Development of Sustainable Polyoxymethylene (POM)-Based Composites by the Introduction of Natural Fillers and Melt Blending with Poly(lactic acid)-PLA
- Author
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Anna Soćko and Jacek Andrzejewski
- Subjects
polymer composites ,polyoxymethylene ,poly(lactic acid) ,natural fillers ,polymer blends ,mechanical properties ,Technology ,Science - Abstract
The conducted study was focused on the development of a new type of technical blend reinforced with natural fillers. The study was divided into two parts, where, in the first stage of the research, unmodified POM was reinforced with different types of natural fillers: cellulose, wood flour, and husk particles. In order to select the type of filler intended for further modification, the mechanical characteristics were assessed. The 20% wood flour (WF) filler system was selected as the reinforcement. The second stage of research involved the use of a combination of polyoxymethylene POM and poly(lactic acid) PLA. The POM/PLA blend (ratio 50/50%) was modified with an elastomeric compound (EBA) and chain extender as the compatibilized reactive (CE). The microscopic analysis revealed that for the POM/PLA system, the filler–matrix interface is characterized by better wettability, which might suggest higher adhesion. The mechanical performance revealed that for POM/PLA-based composites, the properties were very close to the results for POM-WF composites; however, there is still a significant difference in thermal resistance in favor of POM-based materials. The increase in thermomechanical properties for POM/PLA composites occurs after heat treatment. The increasing crystallinity of the PLA phase allows for a significant increase in the heat deflection temperature (HDT), even above 125 °C.
- Published
- 2024
- Full Text
- View/download PDF
48. (Bio)degradable Biochar Composites of PLA/P(3HB-co-4HB) Commercial Blend for Sustainable Future—Study on Degradation and Electrostatic Properties
- Author
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Marta Musioł, Joanna Rydz, Henryk Janeczek, Jacek Andrzejewski, Mariana Cristea, Krzysztof Musioł, Marian Kampik, and Marek Kowalczuk
- Subjects
biodegradable composites ,PLA ,P(3HB-co-4HB) ,biochar ,electrostatic properties ,composting ,Organic chemistry ,QD241-441 - Abstract
Interesting alternatives to expensive biodegradable polymers are their composites with natural fillers. The addition of biochar to a blend of poly(lactic acid) (PLA) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) was studied, and the resulting materials were evaluated for their properties and changes during degradation. Introducing biochar as a filler brought a noticeable improvement in electrostatic properties. Surface resistivity decreased from 3.80 × 1012 for the sample without biochar to 1.32 × 1012 for the sample with 30% filler content. Degradation tests revealed distinct differences in the degradation profile for composites due to the presence of filler. Composites with a lower biochar content displayed curling crack edges during hydrolytic degradation, and when the filler content reached 20 wt%, PLA loss accelerated. This study suggests that biochar-based composites have potential to be used as sustainable materials with improved properties.
- Published
- 2024
- Full Text
- View/download PDF
49. Binge Drinking Disparities by Gender Identity, Race, and Ethnicity in California Secondary Schools
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Andrzejewski, Jack, Calzo, Jerel P., Smith, Laramie R., Corliss, Heather L., and Felner, Jennifer K.
- Abstract
Our objective was to estimate disparities in binge drinking among secondary school students in California at the intersection of gender identity, race, and ethnicity, without aggregating racial and ethnic categories. We combined two years of the statewide middle and high school California Healthy Kids Survey (n = 951,995) and regressed past month binge drinking on gender identity (i.e., cisgender, transgender, or not sure of their gender identity), race (i.e., white, American Indian or Alaskan Native, Asian, Black or African American, Native Hawaiian or Pacific Islander, or multiracial), and ethnicity (i.e., Hispanic/Latinx or non-Hispanic/Latinx), and their interaction. Transgender students had greater odds of reporting past month binge drinking than cisgender students, with greater magnitudes among students with minoritized racial or ethnic identities compared to non-Hispanic/Latinx white students. For example, among non-Hispanic/Latinx white students, transgender students had 1.3 times greater odds (AOR = 1.30, 95% CI = 1.12-1.50), whereas among Hispanic/Latinx Black or African American students, transgender students had 5.3 times greater odds (AOR = 5.33, 95% CI = 3.84-7.39) of reporting past month binge drinking than cisgender students. Transgender adolescents, particularly those with minoritized racial or ethnic identities, may be at disproportionate risk of binge drinking. Interventions that address systemic racism and cisgenderism from an intersectional perspective are needed.
- Published
- 2023
- Full Text
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50. Academic Social Capital of Students from an Alternative School: An Ego Network Perspective
- Author
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Hogan, Eric, Forbes, Sean, and Andrzejewski, Carey
- Abstract
This study looked to explore the access to academic social capital for those who have considering dropping out. The research utilized social network analysis, specifically ego networks, to explore how four individuals from an alternative school perceived their own social networks. Name generators, name interpreters, and name interrelators were used to determine the size, composition, and structure of these networks. Everyone's network differed in either the number of connections, who was within the network, and what resources those people offered. The results were then organized by the potential benefits and problems of the four networks, focusing specifically on the size, composition, and structure. Practitioners can see how to effectively utilize egocentric cognitive social structures.
- Published
- 2023
- Full Text
- View/download PDF
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