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  1. Book ; Online: Theorizing Cultures of Political Violence in Times of Austerity

    Rak, Joanna

    Studying Social Movements in Comparative Perspective

    2018  

    Keywords International relations ; Political Science ; International Relations
    Language English
    Size 1 Online-Ressource
    Publisher Taylor and Francis
    Document type Book ; Online
    Note English
    HBZ-ID HT030383334
    ISBN 9781351205757 ; 1351205757
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Book ; Thesis: Untersuchungen zur Migration und Differenzierung von Neuroblasten am Frontalhirnschnittkulturmodell der Maus

    Rak, Rebecca Andrea Katharina

    2016  

    Author's details vorgelegt 2015 von Rebecca Andrea Katharina Rak geboren in Tübingen
    Language German
    Size IX, 145 Seiten, Illustrationen, Diagramme
    Publishing place Freiburg im Breisgau
    Publishing country Germany
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Dissertation, Albert-Ludwigs-Universität Freiburg im Breisgau, 2016
    HBZ-ID HT019000218
    Database Catalogue ZB MED Medicine, Health

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    Shelf markLoan statusLocation
    2016 E 999 order for loan Magazin

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  3. Article ; Online: Multifractality of Complex Networks Is Also Due to Geometry: A Geometric Sandbox Algorithm.

    Rak, Rafał / Rak, Ewa

    Entropy (Basel, Switzerland)

    2023  Volume 25, Issue 9

    Abstract: Over the past three decades, describing the reality surrounding us using the language of complex networks has become very useful and therefore popular. One of the most important features, especially of real networks, is their complexity, which often ... ...

    Abstract Over the past three decades, describing the reality surrounding us using the language of complex networks has become very useful and therefore popular. One of the most important features, especially of real networks, is their complexity, which often manifests itself in a fractal or even multifractal structure. As a generalization of fractal analysis, the multifractal analysis of complex networks is a useful tool for identifying and quantitatively describing the spatial hierarchy of both theoretical and numerical fractal patterns. Nowadays, there are many methods of multifractal analysis. However, all these methods take into account only the fact of connection between nodes (and eventually the weight of edges) and do not take into account the real positions (coordinates) of nodes in space. However, intuition suggests that the geometry of network nodes' position should have a significant impact on the true fractal structure. Many networks identified in nature (e.g., air connection networks, energy networks, social networks, mountain ridge networks, networks of neurones in the brain, and street networks) have their own often unique and characteristic geometry, which is not taken into account in the identification process of multifractality in commonly used methods. In this paper, we propose a multifractal network analysis method that takes into account both connections between nodes and the location coordinates of nodes (network geometry). We show the results for different geometrical variants of the same network and reveal that this method, contrary to the commonly used method, is sensitive to changes in network geometry. We also carry out tests for synthetic as well as real-world networks.
    Language English
    Publishing date 2023-09-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2014734-X
    ISSN 1099-4300 ; 1099-4300
    ISSN (online) 1099-4300
    ISSN 1099-4300
    DOI 10.3390/e25091324
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Book ; Thesis: Validierung der deutschen Version des P-QOL-Fragebogens

    Rak, Michael

    2009  

    Author's details vorgelegt von Michael Rak
    Subject code 618.1
    Language German
    Size IV, 104 Bl. : graph. Darst., 30 cm
    Publishing country Germany
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Heidelberg, Univ., Diss., 2010
    HBZ-ID HT016602782
    Database Catalogue ZB MED Medicine, Health

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    Shelf markLoan statusLocation
    2010 E 2902 order for loan Magazin

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  5. Article ; Online: Cancer genes and blood clots.

    Rak, Janusz

    Blood

    2021  Volume 137, Issue 15, Page(s) 1996–1997

    MeSH term(s) Blood Coagulation/genetics ; Humans ; Neoplasms/genetics ; Oncogenes ; Thrombosis/genetics
    Language English
    Publishing date 2021-04-15
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 80069-7
    ISSN 1528-0020 ; 0006-4971
    ISSN (online) 1528-0020
    ISSN 0006-4971
    DOI 10.1182/blood.2020009967
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Uh III Zs.140: Show issues Location:
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    ab Jg. 2022: Lesesaal (EG)
    Zs.MO 364: Show issues

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  6. Article ; Online: Multifractality of Complex Networks Is Also Due to Geometry

    Rafał Rak / Ewa Rak

    Entropy, Vol 25, Iss 1324, p

    A Geometric Sandbox Algorithm

    2023  Volume 1324

    Abstract: Over the past three decades, describing the reality surrounding us using the language of complex networks has become very useful and therefore popular. One of the most important features, especially of real networks, is their complexity, which often ... ...

    Abstract Over the past three decades, describing the reality surrounding us using the language of complex networks has become very useful and therefore popular. One of the most important features, especially of real networks, is their complexity, which often manifests itself in a fractal or even multifractal structure. As a generalization of fractal analysis, the multifractal analysis of complex networks is a useful tool for identifying and quantitatively describing the spatial hierarchy of both theoretical and numerical fractal patterns. Nowadays, there are many methods of multifractal analysis. However, all these methods take into account only the fact of connection between nodes (and eventually the weight of edges) and do not take into account the real positions (coordinates) of nodes in space. However, intuition suggests that the geometry of network nodes’ position should have a significant impact on the true fractal structure. Many networks identified in nature (e.g., air connection networks, energy networks, social networks, mountain ridge networks, networks of neurones in the brain, and street networks) have their own often unique and characteristic geometry, which is not taken into account in the identification process of multifractality in commonly used methods. In this paper, we propose a multifractal network analysis method that takes into account both connections between nodes and the location coordinates of nodes (network geometry). We show the results for different geometrical variants of the same network and reveal that this method, contrary to the commonly used method, is sensitive to changes in network geometry. We also carry out tests for synthetic as well as real-world networks.
    Keywords complex networks ; fractal networks ; models of complex networks ; universality ; Science ; Q ; Astrophysics ; QB460-466 ; Physics ; QC1-999
    Subject code 000
    Language English
    Publishing date 2023-09-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  7. Article ; Online: Pocket Queens

    Julie Rak

    Critical Gambling Studies, Vol 3, Iss

    2022  Volume 1

    Abstract: Approaches from the humanities that understand poker as a culture (rather than as a gambling pathology or an isolated gaming activity) can help to highlight the voices and stories of women and connect them to feminist and gender research. Stories by ... ...

    Abstract Approaches from the humanities that understand poker as a culture (rather than as a gambling pathology or an isolated gaming activity) can help to highlight the voices and stories of women and connect them to feminist and gender research. Stories by individual women who may or may not be feminists can be most usefully described as “perifeminist,” a description of the strategies to cope with sexism that do not necessarily involve either confrontation or negation. Understanding women’s poker stories within this framework can bring depth and breadth to the representation of female poker players in popular journalism, which generally characterizes female players as objects or accessories for male players. In this article, I analyze the gender politics of memoirs by Annie Duke and Victoria Coren, prominent female players whose texts are widely read, because these memoirs are a good place to look for perifeminist strategies and a sense of what being part of poker culture involves for women. Looking for and noticing the stories of female players and contextualizing them as part of the everyday experiences of gender politics can do much to make the lives of poker playing women more visible, and worthy of critical attention.
    Keywords women;feminism;gambling;humanities ; Recreation. Leisure ; GV1-1860 ; Social Sciences ; H
    Subject code 820
    Language English
    Publishing date 2022-03-01T00:00:00Z
    Publisher University of Alberta Library
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: L(C3)icensing of exosomes for RNA export.

    Rak, Janusz

    Nature cell biology

    2020  Volume 22, Issue 2, Page(s) 137–139

    MeSH term(s) Exosomes ; Extracellular Vesicles ; RNA ; RNA-Binding Proteins
    Chemical Substances RNA-Binding Proteins ; RNA (63231-63-0)
    Language English
    Publishing date 2020-01-28
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1474722-4
    ISSN 1476-4679 ; 1465-7392
    ISSN (online) 1476-4679
    ISSN 1465-7392
    DOI 10.1038/s41556-020-0466-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 5169: Show issues Location:
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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)
    Zs.MG 12: Show issues

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  9. Article ; Online: A Measurement System for the Environmental Load Assessment of a Scale Ship Model-Part II.

    Miller, Anna / Rak, Andrzej

    Sensors (Basel, Switzerland)

    2023  Volume 23, Issue 7

    Abstract: In the process of ship motion control system design, it is necessary to take into account the impact of environmental disturbances such as winds, waves and sea currents. The commonly used representatives of wave influences in this area are the ... ...

    Abstract In the process of ship motion control system design, it is necessary to take into account the impact of environmental disturbances such as winds, waves and sea currents. The commonly used representatives of wave influences in this area are the unidirectional wave power spectral density functions describing sea waves of different form: long-crested, fully developed waves, developing wind waves or multi-modal waves (e.g., with swell). The existing standard PSD models describe the surge of open sea or ocean. However, they are inadequate in the case of control system testing of scale ship models for sailing in open water areas such as lakes or test pools. This paper presents a study of wind-generated wave PSD estimations for a small lake used as a test area for free-running scale ships. The publication provides a brief overview of the wave spectral density functions commonly used for control system design. A measurement instrument using the idea of a water-induced variable capacitance that works synchronously with the wind sensors is also described. The process of collected data analysis is presented. As a result of the study, a series of empirical spectral density functions of lake waves for different wind speeds are obtained. They correspond to the rescaled, two-parametric ITTC model.
    Language English
    Publishing date 2023-03-24
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s23073415
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Surgical Management of Multiple-Level Lumbar Spinal Schwannomas: A Case Report.

    Ekhator, Chukwuyem / Rak, Ramin

    Cureus

    2023  Volume 15, Issue 6, Page(s) e41113

    Abstract: The increase in benign spinal tumors among adults over the last decade has been a major cause of concern. This worrisome trend has been attributed to many factors, including improved detection techniques, enhanced access to medical care, and the aging ... ...

    Abstract The increase in benign spinal tumors among adults over the last decade has been a major cause of concern. This worrisome trend has been attributed to many factors, including improved detection techniques, enhanced access to medical care, and the aging population. The research primarily focuses on Schwannoma, which is a rare type of tumor that arises from Schwann cells, which are responsible for producing the myelin sheath that surrounds and protects nerves. Although the majority of schwannomas are benign, there have been instances where they have transformed into malignant tumors, potentially leading to significant morbidity and mortality. We report a case of a 68-year-old woman who presented with progressive back pain and weakness in both lower limbs over the past months. The pain was initially localized to the lower back but gradually intensified and radiated down to the legs. The patient reported difficulty walking and a sensation of tingling and numbness in the feet. She denied any recent trauma or significant medical history. On physical examination, there was reduced muscle strength (3/5) in both lower limbs. The patient exhibited hyporeflexia in the knees and ankle. A magnetic resonance imaging (MRI) of the spine was performed, revealing a well-defined mass lesion located in the lumbar region, compressing the spinal cord from L2 to L5. The patient was counseled and prepared for surgical resection of the tumor. Histopathological findings revealed features of peripheral nerve sheath tumors and cellular schwannomas. The patient recovered well postoperatively. The surgeon operating should be mindful of the potential presence of a mobile schwannoma, even though it is rarely mentioned in the literature. Being aware of this possibility can help prevent unnecessary surgical dissection, which can lead to higher rates of complications and morbidity. Although it is plausible that this case could have involved a mobile schwannoma, there was not enough evidence to support it as we performed a laminectomy on multiple levels due to the tumor's size.
    Language English
    Publishing date 2023-06-28
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.41113
    Database MEDical Literature Analysis and Retrieval System OnLINE

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