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Results 451-460 of 2278 (Search time: 0.005 seconds).
    • Closed Embedded Self-shrinkers of Mean Curvature Flow
    Authors: Oskar, Riedler;  Advisor: -;  Co-Author: - (2023)

    In this article, we show the existence of closed embedded self-shrinkers in Rn+1 that are topologically of type S1×M, where M⊂Sn is any isoparametric hypersurface in Sn for which the multiplicities of the principle curvatures agree. This yields new examples of closed self-shrinkers, for example self-shrinkers of topological type S1×Sk×Sk⊂R2k+2 for any k. If the number of distinct principle curvatures of M is one, the resulting self-shrinker is topologically S1×Sn−1 and the construction recovers Angenent’s shrinking doughnut (Angenent in Shrinking doughnuts, Birkhäuser, Boston, pp 21–38).
    • A new genetic algorithm method based on statistical-based replacement for the training of multiplicative neuron model artificial neural networks
    Authors: Erol, Egrioglu; Crina, Grosan; Eren, Bas;  Advisor: -;  Co-Author: - (2023)

    In this study, we propose a new genetic algorithm that uses a statistical-based chromosome replacement strategy determined by the empirical distribution of the objective function values. The proposed genetic algorithm is further used in the training process of a multiplicative neuron model artificial neural network. The objective function value for the genetic algorithm is the root mean square error of the multiplicative neuron model artificial neural network prediction. This combination of methods is proposed for a particular type of problems, that is, time-series prediction.
    • Operators Induced by Radial Measures Acting on the Dirichlet Space
    Authors: Petros, Galanopoulos; Daniel, Girela; Alejandro, Mas;  Advisor: -;  Co-Author: - (2023)

    These are natural generalizations of the classical Hilbert and Cesàro operators. A good amount of work has been devoted recently to study the action of these operators on distinct spaces of analytic functions in D . In this paper we study the action of the operators Hμ and Cμ on the Dirichlet space D and, more generally, on the analytic Besov spaces Bp (1≤p<∞).
    • Heart rate variability as an indicator of COVID-19 induced myocardial injury a retrospective cohort study
    Authors: Hani, Taman; Nabil, Mageed; Mohamed, Elmorsy;  Advisor: -;  Co-Author: - (2023)

    Heart rate variability (HRV) is a valuable indicator of autonomic nervous system integrity and can be a prognostic tool of COVID-19 induced myocardial affection. This study aimed to compare HRV indices between patients who developed myocardial injury and those without myocardial injury in COVID-19 patients who were admitted to intensive care unit (ICU).
    • Semi Post–Widder Operators and Difference Estimates
    Authors: Vijay, Gupta; Monika, Herzog;  Advisor: -;  Co-Author: - (2023)

    We consider the Post–Widder operators of semi-exponential type, which are a generalization of the exponential operators connected with x2. This modification has the beauty to find difference with other operators, while the original Post–Widder operators do not have such property. We estimate quantitative difference of these operators with Baskakov type operators and Szász–Kantorovich operators, along with some composition of operators. Finally, we further consider a form preserving linear functions and estimate some direct results.
    • Enumerating odd-degree hyperelliptic curves and abelian surfaces over P1
    Authors: Changho, Han; Jun-Yong, Park;  Advisor: -;  Co-Author: - (2023)

    As explained therein by Venkatesh, in many interesting number theory problems (e.g., counting number fields, arithmetic curves or abelian varieties over a number field) one has not only a main term in the asymptotic count, but a secondary term or more. We have very little understanding of these lower order terms. They are not just of theoretical interest: when one tries to verify the conjectures numerically, one finds that the secondary terms are dominant in the computational range. For example, the number of cubic number fields of height ≤B for certain constants a,b>0 is aB+bB5/6+o(B56).
    • The potential of point-of-care diagnostics to optimise prehospital trauma triage a systematic review of literature
    Authors: Leonard, Stojek; Dan, Bieler; Anne, Neubert;  Advisor: -;  Co-Author: - (2023)

    In the prehospital care of potentially seriously injured patients resource allocation adapted to injury severity (triage) is a challenging. Insufficiently specified triage algorithms lead to the unnecessary activation of a trauma team (over-triage), resulting in ineffective consumption of economic and human resources. A prehospital trauma triage algorithm must reliably identify a patient bleeding or suffering from significant brain injuries. By supplementing the prehospital triage algorithm with in-hospital established point-of-care (POC) tools the sensitivity of the prehospital triage is potentially increased.
    • Physical activity and chronic obstructive pulmonary disease a scoping review
    Authors: Xinyue, Xiang; Lihua, Huang; Yong, Fang;  Advisor: -;  Co-Author: - (2023)

    Reduced physical activity (PA) was the strongest predictor of all-cause mortality in patients with chronic obstructive pulmonary disease (COPD). This scoping review aimed to map the evidence on the current landscape of physical activity, barriers and facilitators, and assessment tools across COPD patients.
    • Spherical pneumonia caused by Ralstonia mannitolilytica: a case report and literature review
    Authors: Jianli, Ma; Chuantao, Zhang; Kaijie, Dang;  Advisor: -;  Co-Author: - (2023)

    Spherical pneumonia is an extremely rare condition that is difficult to diagnose. It is a specific type of lung infection that often manifests as a round or round-like mass on chest imaging. Spherical pneumonia is easily misdiagnosed as a pulmonary tumor; therefore, awareness of this disease must be strengthened.