Auflistung nach Autor:in "Schneider, Gerhard"

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Dynamic patterns of global brain communication differentiate conscious from unconscious patients after severe brain injury
(Frontiers Research Foundation, 2021) Golkowski, Daniel; Willnecker, Rebecca; Rösler, Jennifer; Ranft, Andreas; Schneider, Gerhard; Jordan, Denis; Ilg, Rüdiger
The neurophysiology of the subjective sensation of being conscious is elusive; therefore, it remains controversial how consciousness can be recognized in patients who are not responsive but seemingly awake. During general anesthesia, a model for the transition between consciousness and unconsciousness, specific covariance matrices between the activity of brain regions that we call patterns of global brain communication reliably disappear when people lose consciousness. This functional magnetic imaging study investigates how patterns of global brain communication relate to consciousness and unconsciousness in a heterogeneous sample during general anesthesia and after brain injury. First, we describe specific patterns of global brain communication during wakefulness that disappear during propofol and sevoflurane general anesthesia. Second, we search for these patterns in a cohort of unresponsive wakeful patients and unmatched healthy controls in order to evaluate their potential use in clinical practice. We found that patterns of global brain communication characterized by high covariance in sensory and motor areas or low overall covariance and their dynamic change were strictly associated with intact consciousness in this cohort. In addition, we show that the occurrence of these two patterns is significantly related to activity within the frontoparietal network of the brain, a network known to play a crucial role in conscious perception. We propose that this approach potentially recognizes consciousness in the clinical routine setting.
01A - Beitrag in wissenschaftlicher Zeitschrift
Panorama et observatoire de l'Agenda 2030 au niveau local - ancrer les Objectifs de Développe-ment Durable ODD dans la gestion des tâches et processus communaux
(Fachhochschule Nordwestschweiz FHNW, 2023) Schneider, Gerhard; Daub, Claus-Heinrich; Rossel, Dominique; Pamingle, Leila; Zimmermann, Jennifer
Wissenschaftlicher Schlussbericht zu Innosuisse-Projekt 31579.1 IP-SBM
05 - Forschungs- oder Arbeitsbericht
Teaching ordinal patterns to a computer. Efficient encoding algorithms based on the Lehmer code
(MDPI, 2019) Berger, Sebastian; Kravtsiv, Andrii; Schneider, Gerhard; Jordan, Denis
Ordinal patterns are the common basis of various techniques used in the study of dynamical systems and nonlinear time series analysis. The present article focusses on the computational problem of turning time series into sequences of ordinal patterns. In a first step, a numerical encoding scheme for ordinal patterns is proposed. Utilising the classical Lehmer code, it enumerates ordinal patterns by consecutive non-negative integers, starting from zero. This compact representation considerably simplifies working with ordinal patterns in the digital domain. Subsequently, three algorithms for the efficient extraction of ordinal patterns from time series are discussed, including previously published approaches that can be adapted to the Lehmer code. The respective strengths and weaknesses of those algorithms are discussed, and further substantiated by benchmark results. One of the algorithms stands out in terms of scalability: its run-time increases linearly with both the pattern order and the sequence length, while its memory footprint is practically negligible. These properties enable the study of high-dimensional pattern spaces at low computational cost. In summary, the tools described herein may improve the efficiency of virtually any ordinal pattern-based analysis method, among them quantitative measures like permutation entropy and symbolic transfer entropy, but also techniques like forbidden pattern identification. Moreover, the concepts presented may allow for putting ideas into practice that up to now had been hindered by computational burden. To enable smooth evaluation, a function library written in the C programming language, as well as language bindings and native implementations for various numerical computation environments are provided in the supplements.
01A - Beitrag in wissenschaftlicher Zeitschrift
The concerns of the young protesters are justified. A statement by Scientists for Future concerning the protests for more climate protection
(oekom, 2019) Hagedorn, Gregor; Loew, Thomas; Seneviratne, Sonia I.; Lucht, Wolfgang; Beck, Marie-Luise; Hesse, Janina; Knutti, Reto; Quaschning, Volker; Schleimer, Jan-Hendrik; Mattauch, Linus; Breyer, Christian; Hübener, Heike; Kirchengast, Gottfried; Chodura, Alice; Clausen, Jens; Creutzig, Felix; Darbi, Marianne; Daub, Claus-Heinrich; Ekardt, Felix; Göpel, Maja; Hardt, Judith N.; Hertin, Julia; Hickler, Thomas; Köhncke, Arnulf; Köster, Stephan; Krohmer, Julia; Kromp-Kolb, Helga; Leinfelder, Reinhold; Mederake, Linda; Neuhaus, Michael; Rahmstorf, Stefan; Schmidt, Christine; Schneider, Christoph; Schneider, Gerhard; Seppelt, Ralf; Spindler, Uli; Springmann, Marco; Staab, Katharina; Stocker, Thomas F.; Steininger, Karl; von Hirschhausen, Eckart; Winter, Susanne; Wittau, Martin; Zens, Josef
In March 2019, German-speaking scientists and scholars calling themselves Scientists for Future, published a statement in support of the youth protesters in Germany, Austria, and Switzerland (Fridays for Future, Klimastreik/Climate Strike), verifying the scientific evidence that the youth protestors refer to. In this article, they provide the full text of the statement, including the list of supporting facts (in both English and German) as well as an analysis of the results and impacts of the statement. Furthermore, they reflect on the challenges for scientists and scholars who feel a dual responsibility: on the one hand, to remain independent and politically neutral, and, on the other hand, to inform and warn societies of the dangers that lie ahead.
01A - Beitrag in wissenschaftlicher Zeitschrift