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1

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Spectral clustering of Markov chain transition matrices with complex eigenvalues (2024)

Frank, Anna-Simone ; Sikorski, Alexander ; Röblitz, Susanna

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Publication Date: 2024-01-29

Description: The Robust Perron Cluster Analysis (PCCA+) has become a popular spectral clustering algorithm for coarse-graining transition matrices of nearly decomposable Markov chains with transition states. Originally developed for reversible Markov chains, the algorithm only worked for transition matrices with real eigenvalues. In this paper, we therefore extend the theoretical framework of PCCA+ to Markov chains with a complex eigen-decomposition. We show that by replacing a complex conjugate pair of eigenvectors by their real and imaginary components, a real representation of the same subspace is obtained, which is suitable for the cluster analysis. We show that our approach leads to the same results as the generalized PCCA+ (GPCCA), which replaces the complex eigen-decomposition by a conceptually more difficult real Schur decomposition. We apply the method on non-reversible Markov chains, including circular chains, and demonstrate its efficiency compared to GPCCA. The experiments are performed in the Matlab programming language and codes are provided.

Language: German

Type: article , doc-type:article

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2

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Fiber-coupled solid-state-based single-photon sources (2024)

Musial, Anna ; Sek, Grzegorz ; Schneider, Philipp-Immanuel ; [et al.]

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Publication Date: 2024-02-27

Language: German

Type: incollection , doc-type:Other

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3

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Clinical Effectiveness of Ritonavir-Boosted Nirmatrelvir—A Literature Review (2024)

Paltra, Sydney ; Conrad, Tim

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Publication Date: 2024-06-13

Description: Nirmatrelvir/Ritonavir is an oral treatment for mild to moderate COVID-19 cases with a high risk for a severe course of the disease. For this paper, a comprehensive literature review was performed, leading to a summary of currently available data on Nirmatrelvir/Ritonavir’s ability to reduce the risk of progressing to a severe disease state. Herein, the focus lies on publications that include comparisons between patients receiving Nirmatrelvir/Ritonavir and a control group. The findings can be summarized as follows: Data from the time when the Delta-variant was dominant show that Nirmatrelvir/Ritonavir reduced the risk of hospitalization or death by 88.9% for unvaccinated, non-hospitalized high-risk individuals. Data from the time when the Omicron variant was dominant found decreased relative risk reductions for various vaccination statuses: between 26% and 65% for hospitalization. The presented papers that differentiate between unvaccinated and vaccinated individuals agree that unvaccinated patients benefit more from treatment with Nirmatrelvir/Ritonavir. However, when it comes to the dependency of potential on age and comorbidities, further studies are necessary. From the available data, one can conclude that Nirmatrelvir/Ritonavir cannot substitute vaccinations; however, its low manufacturing cost and easy administration make it a valuable tool in fighting COVID-19, especially for countries with low vaccination rates.

Language: German

Type: article , doc-type:article

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4

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URIs im GLAM-Bereich – was sie sind und wie man sie verwendet (2024)

Winkler, Alexander

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Publication Date: 2024-07-08

Description: Das Papier gibt Hinweise zu URIs (Uniform Resource Identifiers) im GLAM-Sektor.

Language: German

Type: other , doc-type:Other

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5

Book

Künstliche Intelligenz und wissenschaftliches Arbeiten : ChatGPT & Co.: Der Turbo für ein erfolgreiches Studium (2024)

Bucher, Ulrich ; Holzweißig, Kai ; Schwarzer, Markus

München :Verlag Franz Vahlen,

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Title: Künstliche Intelligenz und wissenschaftliches Arbeiten : ChatGPT & Co.: Der Turbo für ein erfolgreiches Studium

Author: Bucher, Ulrich

Contributer: Holzweißig, Kai , Schwarzer, Markus

Publisher: München :Verlag Franz Vahlen,

Year of publication: 2024

Pages: X, 181 Seiten

ISBN: 978-3-8006-7322-3

Type of Medium: Book

Language: German

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6

Book

¬Eine¬ kurze Geschichte der Künstlichen Intelligenz / (2024)

Wildenhain, Michael

Stuttgart :Klett-Cotta,

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Title: ¬Eine¬ kurze Geschichte der Künstlichen Intelligenz /

Author: Wildenhain, Michael

Publisher: Stuttgart :Klett-Cotta,

Year of publication: 2024

Pages: 119 Seiten

ISBN: 978-3-7681-9824-0

Type of Medium: Book

Language: German

URL: Inhaltstext

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7

Book

Anwendungen mit GPT-4 und ChatGPT entwickeln : intelligente Chatbots, Content-Generatoren und mehr erstellen (2024)

Caelen, Olivier ; Blete, Marie-Alice

Heidelberg :O'Reilly,

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Title: Anwendungen mit GPT-4 und ChatGPT entwickeln : intelligente Chatbots, Content-Generatoren und mehr erstellen

Author: Caelen, Olivier

Contributer: Blete, Marie-Alice

Edition: 1. Auflage

Publisher: Heidelberg :O'Reilly,

Year of publication: 2024

Pages: 158 Seiten

ISBN: 978-3-96009-241-4

Type of Medium: Book

Language: German

URL: Inhaltstext

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8

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Tätigkeitsbericht 1985 (1986)

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Publication Date: 2019-10-24

Keywords: ddc:000

Language: German

Type: annualzib , doc-type:report

Format: application/pdf

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9

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Tätigkeitsbericht-1985. (1986)

Schuster, H. J.

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Publication Date: 2014-02-26

Keywords: ddc:000

Language: German

Type: reportzib , doc-type:preprint

Format: application/pdf

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10

Book

Collected Works; 4 (1986)

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Title: Collected Works; 4

Year of publication: 1986

Pages: 463 S.

Series Statement: Collected Works 4

ISBN: 3-88908-213-0

Type of Medium: Book

Language: German

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Zuse Institute Berlin

11

Book

Collected Works; 5 (1986)

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Title: Collected Works; 5

Year of publication: 1986

Pages: 496 S.

Series Statement: Collected Works 5

ISBN: 3-88908-214-9

Type of Medium: Book

Language: German

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Zuse Institute Berlin

12

Book

Collected Works; 6 (1986)

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Title: Collected Works; 6

Year of publication: 1986

Pages: 512 S.

Series Statement: Collected Works 6

ISBN: 3-88908-215-7

Type of Medium: Book

Language: German

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13

Book

Collected Works; 7 (1986)

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Title: Collected Works; 7

Year of publication: 1986

Pages: 512 S.

Series Statement: Collected Works 7

ISBN: 3-88908-216-5

Type of Medium: Book

Language: German

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14

Book

Taschenbuch für den Maschinenbau / (1986)

Dubbel, Heinrich [[Begr.]] ; Beitz, Wolfgang

Berlin [u.a.] :Springer,

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Title: Taschenbuch für den Maschinenbau /

Contributer: Dubbel, Heinrich , Beitz, Wolfgang

Edition: Korr. Nachdr. d. 15., korr. u. erg. Aufl

Publisher: Berlin [u.a.] :Springer,

Year of publication: 1986

Pages: XXXVIII, 1498 S. : , graph. Darst. ; , 25 cm

ISBN: 3-540-12418-7 , 0-387-12418-7

Type of Medium: Book

Language: German

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