13 results on '"Reiners D"'
Search Results
2. Left atrial low-voltage areas, but not volume, predict the recurrence of atrial fibrillation in repeat ablation procedures
- Author
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Georgi, C, primary, Bannehr, M, additional, Lochmann, M, additional, Reiners, D, additional, Haase-Fielitz, A, additional, Seifert, M, additional, and Butter, C, additional
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- 2024
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3. Strong dipole magnetic fields in fast rotating fully convective stars
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Reiners, D. Shulyak A., Engeln, A., Malo, L., Yadav, R., Morin, J., and Kochukhov, O.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
M dwarfs are the most numerous stars in our Galaxy with masses between approximately 0.5 and 0.1 solar mass. Many of them show surface activity qualitatively similar to our Sun and generate flares, high X-ray fluxes, and large-scale magnetic fields. Such activity is driven by a dynamo powered by the convective motions in their interiors. Understanding properties of stellar magnetic fields in these stars finds a broad application in astrophysics, including, e.g., theory of stellar dynamos and environment conditions around planets that may be orbiting these stars. Most stars with convective envelopes follow a rotation-activity relationship where various activity indicators saturate in stars with rotation periods shorter than a few days. The activity gradually declines with rotation rate in stars rotating more slowly. It is thought that due to a tight empirical correlation between X-ray and magnetic flux, the stellar magnetic fields will also saturate, to values around ~4kG. Here we report the detection of magnetic fields above the presumed saturation limit in four fully convective M-dwarfs. By combining results from spectroscopic and polarimetric studies we explain our findings in terms of bistable dynamo models: stars with the strongest magnetic fields are those in a dipole dynamo state, while stars in a multipole state cannot generate fields stronger than about four kilogauss. Our study provides observational evidence that dynamo in fully convective M dwarfs generates magnetic fields that can differ not only in the geometry of their large scale component, but also in the total magnetic energy., Comment: Version accepted for publication by Nature Astronomy (13 June 2017; https://www.nature.com/articles/s41550-017-0184)
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- 2018
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4. Optically based direct manipulation for augmented reality
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Klinker, G, Stricker, D, and Reiners, D
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- 1999
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5. Comparing aimed movements in the real world and in virtual reality
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Liu, L., Liere, van, R., Nieuwenhuizen, C.J.H., Martens, J.B.O.S., Steed, A., Reiners, D., Lindeman, R.W., Algorithms, Geometry and Applications, and Visualization
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Computer science ,Human–computer interaction ,Virtual machine ,Solid modeling ,User interface ,Virtual reality ,computer.software_genre ,computer ,Phase (combat) ,Simulation ,User-centered design - Abstract
The study of aimed movements has a long history, starting at least as far back as 1899 when Wood-worth proposed a two-component model in which aimed movements are broken into an initial ballistic phase and an additional control phase. In this paper, we use Wood-worth's model for experimentally comparing aimed movements in the real world with those in a virtual environment. Trajectories from real world movements have been collected and compared to trajectories of movements taken from a virtual environment. From this, we show that significant temporal differences arise in both the ballistic and control phases, but the difference is much larger in the control phase; users' improvement is relatively greater in the virtual world than in the real world. They progress more in ballistic phase in the real world, but more in correction phase in the virtual world. These results allow us to better understand the pointing tasks in virtual environments.
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- 2009
6. Ein Vergleich des Verlaufs von gleichgeschlechtlich herztransplantierten mit gegengeschlechtlich herztransplantierten Männern – mögliche Einflüsse des Chimärismus
- Author
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Reiners, D. (Daniel), Nikol, S. (Sigrid), and Universitäts- und Landesbibliothek Münster
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Medicine and health ,ddc:610 ,Herztransplantation ,Abstoßung ,Immunsuppressiva ,Überlebenszeit ,Echokardiographie - Abstract
Im Rahmen dieser retrospektiven Studie wurde unter Verwendung der bei der Nachsorge von 57 im Zeitraum von 1990 bis 2002 in Münster orthotop gegengeschlechtlich herztransplantierten Männern gewonnenen Daten ein Vergleich mit den 179 im gleichen Zeitraum orthotop gleichgeschlechtlich herztransplantierten Männern durchgeführt. Erstere weisen eine im Vergleich zu letzteren geringere mittlere Überlebenszeit auf. Die echokardiographisch kleineren Frauenherzen erlitten häufiger Abstoßungen höherer Grade, die innerhalb des ersten postoperativen Quartals häufiger als in den übrigen Quartalen des ersten postoperativen Jahrs auftraten. Echokardiographisch funktionelle Unterschiede und signifikante Differenzen bzgl. der applizierten Dosis der Immunsuppressiva bzw. der Entzündungsparameter ließen sich nicht finden. In der Zusammenschau unterstützt diese Arbeit die These immunologisch bedingter Ursachen für den Unterschied im Überleben der gleich- bzw. gegengeschlechtlich herztransplantierten Männer.
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- 2007
7. Special Issue on the OpenSG Symposium and OpenSG Plus
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Reiners, D, primary
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- 2004
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8. MetNetGE: interactive views of biological networks and ontologies
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Jia Ming, Choi Suh-Yeon, Reiners Dirk, Wurtele Eve S, and Dickerson Julie A
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Computer applications to medicine. Medical informatics ,R858-859.7 ,Biology (General) ,QH301-705.5 - Abstract
Abstract Background Linking high-throughput experimental data with biological networks is a key step for understanding complex biological systems. Currently, visualization tools for large metabolic networks often result in a dense web of connections that is difficult to interpret biologically. The MetNetGE application organizes and visualizes biological networks in a meaningful way to improve performance and biological interpretability. Results MetNetGE is an interactive visualization tool based on the Google Earth platform. MetNetGE features novel visualization techniques for pathway and ontology information display. Instead of simply showing hundreds of pathways in a complex graph, MetNetGE gives an overview of the network using the hierarchical pathway ontology using a novel layout, called the Enhanced Radial Space-Filling (ERSF) approach that allows the network to be summarized compactly. The non-tree edges in the pathway or gene ontology, which represent pathways or genes that belong to multiple categories, are linked using orbital connections in a third dimension. Biologists can easily identify highly activated pathways or gene ontology categories by mapping of summary experiment statistics such as coefficient of variation and overrepresentation values onto the visualization. After identifying such pathways, biologists can focus on the corresponding region to explore detailed pathway structure and experimental data in an aligned 3D tiered layout. In this paper, the use of MetNetGE is illustrated with pathway diagrams and data from E. coli and Arabidopsis. Conclusions MetNetGE is a visualization tool that organizes biological networks according to a hierarchical ontology structure. The ERSF technique assigns attributes in 3D space, such as color, height, and transparency, to any ontological structure. For hierarchical data, the novel ERSF layout enables the user to identify pathways or categories that are differentially regulated in particular experiments. MetNetGE also displays complex biological pathway in an aligned 3D tiered layout for exploration.
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- 2010
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9. Which Factors Influence the Immensely Fluctuating CRT Implantation Rates in Europe? A Mixed Methods Approach Using Qualitative Content Analysis Based on Expert Interviews.
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Edlinger C, Bannehr M, Georgi C, Reiners D, Lichtenauer M, Haase-Fielitz A, and Butter C
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(1) Background: Cardiac resynchronisation therapy (CRT) is nowadays an indispensable treatment option for heart failure. Although the indication is subject to clear cross-national guidelines by the European Society of Cardiology (ESC), there is immense variation in the number of implantations per 100,000 inhabitants in Europe, especially in German-speaking countries (Germany, Austria and Switzerland). The aim of the present study was to identify possible factors for these differences using a qualitative research approach. (2) Methods: Semi-standardized interviews were conducted with 11 experts in the field of CRT therapy (3 experts from Germany, 4 from Austria and 4 from Switzerland) using a pre-prepared interview template and analysed according to Mayring's qualitative content analysis. (3) Results: The main factors identified were the costs of purchasing the devices and the financing systems of the respective healthcare systems, although cost pressure still seems to play a subordinate role in the German-speaking countries. Moreover, "lack of implementation of ESC guidelines", "insufficient training" and "lack of medical infrastructure" could be excluded as potential reasons. (4) Conclusions: Economic factors, but not a lack of adherence to ESC guidelines, seem to have a major influence on the fluctuating implantation figures in German-speaking countries, according to the unanimous assessment of renowned experts.
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- 2023
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10. Extended Reality (XR) for Condition Assessment of Civil Engineering Structures: A Literature Review.
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Catbas FN, Luleci F, Zakaria M, Bagci U, LaViola JJ Jr, Cruz-Neira C, and Reiners D
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- Engineering, Technology, Augmented Reality, Virtual Reality
- Abstract
Condition assessment of civil engineering structures has been an active research area due to growing concerns over the safety of aged as well as new civil structures. Utilization of emerging immersive visualization technologies such as Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR) in the architectural, engineering, and construction (AEC) industry has demonstrated that these visualization tools can be paradigm-shifting. Extended Reality (XR), an umbrella term for VR, AR, and MR technologies, has found many diverse use cases in the AEC industry. Despite this exciting trend, there is no review study on the usage of XR technologies for the condition assessment of civil structures. Thus, the present paper aims to fill this gap by presenting a literature review encompassing the utilization of XR technologies for the condition assessment of civil structures. This study aims to provide essential information and guidelines for practitioners and researchers on using XR technologies to maintain the integrity and safety of civil structures.
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- 2022
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11. Direct Flow Medical vs. Edwards Sapien 3 Prosthesis: A Propensity Matched Comparison on Intermediate Safety and Mortality.
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Edlinger C, Bannehr M, Wernly B, Kücken T, Okamoto M, Lichtenauer M, Hähnel V, Reiners D, Neuss M, and Butter C
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Aims: To compare intermediate performance and mortality rates in patients, who underwent transcatheter aortic valve implantation (TAVI) with two different types of prostheses: Edwards Sapien 3 (ES3) and Direct Flow Medical (DFM). Methods and Results: 42 consecutive patients implanted with a DFM prosthesis for severe aortic stenosis were matched 1:1 with an equal number of patients, who received an ES3 during the same period. Primary endpoint was mortality. MACE, as a composite of all-cause death, stroke, and re-do-procedure (valve-in-valve), was defined as secondary endpoint. Moreover, we compared NYHA class, NT-proBNP-levels and the extent of restenosis. Patients were followed for 2 years. DFM patients showed echocardiographic elevated mean pressure gradients compared to ES3 patients before discharge (11.2 mmHg ± 5.3 vs. 3.5 mmHg ± 2.7; p < 0.001) and upon 6-months follow-up (20.3 mmHg ± 8.8 vs. 12.3 mmHg ± 4.4; p < 0.001). ES3 candidates showed superior NYHA class at follow-up ( p = 0.001). Kaplan-Meier analysis revealed significantly worse survival in patients receiving a DFM prosthesis compared to ES3 (Breslow p = 0.020). MACE occurred more often in DFM patients compared to ES3 (Breslow p = 0.006). Conclusions: Patients receiving DFM valve prostheses showed worse survival and higher rates in MACE compared to ES3. Prosthesis performance regarding mean pressure gradients and patients' NYHA class also favored ES3., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 Edlinger, Bannehr, Wernly, Kücken, Okamoto, Lichtenauer, Hähnel, Reiners, Neuss and Butter.)
- Published
- 2021
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12. Risk of endoscopic biliary interventions in primary sclerosing cholangitis is similar between patients with and without cirrhosis.
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Peiseler M, Reiners D, Pinnschmidt HO, Sebode M, Jung F, Hartl J, Zenouzi R, Ehlken H, Groth S, Schachschal G, Rösch T, Weiler-Normann C, Lohse AW, and Schramm C
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- Adult, Aged, Alkaline Phosphatase blood, Bilirubin blood, Cholangiopancreatography, Endoscopic Retrograde adverse effects, Cholangitis, Sclerosing etiology, Cholestasis diagnosis, Cholestasis etiology, Female, Humans, Liver Cirrhosis complications, Logistic Models, Male, Middle Aged, Postoperative Complications, Retrospective Studies, Risk Factors, Severity of Illness Index, Sex Factors, Sphincterotomy adverse effects, Stents adverse effects, Cholangitis, Sclerosing diagnosis, Liver Cirrhosis pathology
- Abstract
Background: Endoscopic retrograde cholangiography (ERC) is a mainstay of therapy in patients with primary sclerosing cholangitis (PSC) and obstructive cholestasis. Patients with liver cirrhosis have an increased risk of surgical complications and are more susceptible to infections. Since PSC often progresses to cirrhosis, we aimed to assess whether ERC is associated with increased risk of complications in patients with PSC and cirrhosis., Methods: Out of 383 patients with PSC, 208 patients received endoscopic treatment between 2009-2017. Seventy patients had cirrhosis when ERC was performed and 138 patients had no signs of cirrhosis. Overall, 663 ERC procedures were analysed, with 250 ERC in patients with cirrhosis and 413 ERC in patients without cirrhosis. Data were analysed retrospectively from a prospectively acquired database using repeated measures logistic regression., Results: Overall, 40 procedure-related complications were documented in 663 ERC interventions (6%). The rate of complications was similar between patients with and without cirrhosis (4.4% vs. 7.0%). First-time ERC was associated with a higher risk of complications (17.5% vs. 4.9%). Biliary sphincterotomy, stent placement and female sex, but not presence of liver cirrhosis, were identified as risk factors for overall complications in multivariate analysis. Patients without cirrhosis showed a significant decline of ALP and bilirubin levels after the first two interventions. In contrast, in patients with cirrhosis, ALP and bilirubin levels did not significantly decline after ERC., Conclusions: In patients with PSC, cirrhosis was not a risk factor for post-ERC complications. Therefore, cirrhosis should not preclude endoscopic intervention in patients with clear clinical indication., Competing Interests: The authors have declared that no competing interests exist.
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- 2018
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13. Stuck in the pleistocene: rationality and evolved social roles.
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Reiners D
- Abstract
This article argues that an evolutionary psychological perspective could be useful for developing second-generation models of rationality. The standard model of complete rationality is inadequate primarily on the grounds that it generates predictions inconsistent with empirical data. The model is extremely useful and should not, nor cannot, realistically be dismissed. It accurately predicts outcomes in markets and openly competitive situations. However, behavioral phenomena that the standard theory has trouble explaining -- such as mass contribution to public goods, types of cooperation, and altruism -- are usually treated as "anomalies." These outcomes are too prevalent and important to be treated as such. I attempt to build upon Elinor Ostrom's proposal to generate new models of rationality, which recognize the use of heuristics, norms, and rules, and are able to better account for empirical findings. I argue that second-generation models would benefit from the acknowledgment of social roles -- but more specifically, evolved social roles. Evolved social roles are intuitive bundles of norms, expectations, and social strategies that shape an individual's player type. If we extend rationality to incorporate underlying biopsychological mechanisms, such as evolved social strategies and evolved social roles, then we gain an understanding of a wider array of decision-making processes and social phenomena.
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- 2001
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