feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Online Resource  (6)
  • HU Berlin  (6)
  • SB Forst (Lausitz)
  • SB Templin
  • Open access  (6)
  • 1
    Online Resource
    Online Resource
    Berlin : Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, Institut für Mathematik
    UID:
    edochu_18452_9082
    Format: 1 Online-Ressource (12 Seiten)
    Series Statement: Stochastic Programming E-Print Series 2012,2012,10
    Content: We consider a convex approximation for integer recourse models. In particular, we showthat the claim of Van der Vlerk (2004) that this approximation yields the convex hull of totallyunimodular (TU) integer recourse models is incorrect. We discuss counterexamples, indicate which step of its proof does not hold in general, and identify a class of random variables for which the claim in Van der Vlerk (2004) is not true. At the same time, we derive additional assumptions under which the claim does hold. In particular, if the random variables in the model are independently and uniformly distributed, then these assumptions are satisfied.
    Language: English
    URL: Volltext  (kostenfrei)
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    UID:
    edochu_18452_28261
    Format: 1 Online-Ressource (14 Seiten)
    ISSN: 0004-6280 , 0004-6280
    Content: The Zwicky Transient Facility is a large optical survey in multiple filters producing hundreds of thousands of transient alerts per night. We describe here various machine learning (ML) implementations and plans to make the maximal use of the large data set by taking advantage of the temporal nature of the data, and further combining it with other data sets. We start with the initial steps of separating bogus candidates from real ones, separating stars and galaxies, and go on to the classification of real objects into various classes. Besides the usual methods (e.g., based on features extracted from light curves) we also describe early plans for alternate methods including the use of domain adaptation, and deep learning. In a similar fashion we describe efforts to detect fast moving asteroids. We also describe the use of the Zooniverse platform for helping with classifications through the creation of training samples, and active learning. Finally we mention the synergistic aspects of ZTF and LSST from the ML perspective.
    Content: Peer Reviewed
    In: Chicago, Ill. : Univ. of Chicago Press, 131,997, 0004-6280
    Language: English
    URL: Volltext  (kostenfrei)
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Online Resource
    Online Resource
    Berlin : Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, Institut für Mathematik
    UID:
    edochu_18452_9083
    Format: 1 Online-Ressource (25 Seiten)
    Series Statement: Stochastic Programming E-Print Series 2013,2013,1
    Content: We consider a class of convex approximations for totally unimodular (TU) integer recourse models and derive a uniform error bound by exploiting properties of the total variation of the probability density functions involved. For simple integer recourse models this error bound is tight and improves the existing one by a factor 2, whereas for TU integer recourse modelsthis is the first nontrivial error bound available. The bound ensures that theperformance of the approximations is good as long as the total variations of the densities of all random variables in the model are small enough.
    Language: English
    URL: Volltext  (kostenfrei)
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Online Resource
    Online Resource
    Berlin : Humboldt-Universität zu Berlin
    UID:
    edochu_18452_26199
    Format: 1 Online-Ressource (16 Seiten)
    Content: Die hohe kulturelle Diversität der Straffälligenpopulation bringt eine ganze Reihe an Herausforderungen für Forschung und Praxis mit sich. Diesen Herausforderungen ist mit gängigen Erklärungsmodellen von Delinquenz jedoch kaum zu begegnen. Einerseits bestehen erhebliche Zweifel an deren allgemeiner Gültigkeit im interkulturellen Kontext, weil sie fast ausschließlich für den euroamerikanischen Raum entwickelt wurden. Andererseits bauen viele der Theorien auf dem Konzept der dynamischen Risikofaktoren auf, welches vage definiert ist. Viele dieser Theorien können Delinquenz kaum erklären, weil sie die zugrunde liegenden psychologischen Mechanismen nur wenig spezifizieren. Mit dem Cultural Agency-Model of Criminal Behavior (CAMCB) schlagen die Autoren ein Rahmenmodell vor, das auf die zugrunde liegenden individuellen psychologischen Mechanismen zielgerichteten Handelns abhebt und dabei systematisch zwischen universellen Komponenten und deren kulturell und individuell gefärbten Ausprägungen differenziert. Im CAMCB wird der Einfluss der kulturellen Sozialisation nicht an eine geografische oder ethnische Herkunft gebunden, sondern an kulturelle „traits“ (z. B. interdependenter Verarbeitungsstil), welche die Verhaltensgenese allgemein beeinflussen. An einem Beispiel wird gezeigt, dass delinquentes Verhalten je nach angenommenem kulturellen Trait unterschiedlich erklärt werden kann, während sich die Situation und die Reaktion nicht unterscheiden müssen. Wesentlich sind: erstens die Identifikation der universellen Verhaltenskomponenten, zweitens die Beschreibung deren kulturell und individuell gefärbter Ausprägungen und drittens die Erklärung von Delinquenz auf der Grundlage dieses Wissens. Dieses stufenweise Vorgehen erscheint nicht nur für die kriminalpsychologische Theorieentwicklung von Bedeutung, sondern auch für die forensische Praxis, bei der für jeden Einzelfall kultursensibel eine individuelle Delinquenztheorie formuliert werden muss.
    Content: Because offender populations are highly diverse research and practice face many challenges; however, meeting these challenges with common theories of crime is hardly possible. On the one hand, there is reasonable doubt about their cultural equivalence as these theories were mainly formulated for a Euro-American cultural context. On the other hand, most of the theories are based on the concept of dynamic risk factors, which is vaguely defined. Moreover, most theories do not explain criminal behavior as they do not specify the underlying psychological mechanisms. We propose a framework – the Cultural Agency-Model of Criminal Behavior (CAMCB), which depicts the general processes underpinning human beings’ goal-directed behavior. The CAMCB differentiates between universal components of behavior and the way cultural traits shape the content and operation of these components. The influence of cultural socialization on psychological processes is explained without referring to a person’s ethnic background or heritage but by referring to cultural traits (e.g. interdependency), which shape the agency processes in general. By means of example we show that criminal behavior can be explained differently depending on the cultural trait even though the situation and reaction might be the same. It is essential to first identify universal components of a behavioral process, second, describe how cultural traits influence this process and third, explain criminal behavior on the basis of this knowledge. This stepwise approach is not only central for theory development in criminal psychology but also for forensic practice, as practitioners have to formulate an individual theory of crime for every single person in a culture-sensitive manner.
    In: Forensische Psychiatrie, Psychologie, Kriminologie, Darmstadt : Steinkopff, 15,2020,2, Seiten 143-158
    Language: German
    URL: Volltext  (kostenfrei)
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Online Resource
    Online Resource
    Berlin : Humboldt-Universität zu Berlin, Universitätsbibliothek
    UID:
    b3kat_BV043966239
    Format: 1 Online-Ressource
    Note: Aus: Die Reform ; 1872
    Additional Edition: Elektronische Reproduktion von Nach einem Exemplar der Humboldt-Universität zu Berlin, Universitätsbibliothek mit der Signatur: LP 66484 S859 Stinde, Julius Meistersingermotive Hamburg : J. F. Richter, 1873
    Language: German
    Subjects: German Studies , Musicology
    RVK:
    RVK:
    Keywords: Wagner, Richard 1813-1883 Die Meistersinger von Nürnberg
    URL: Volltext  (kostenfrei)
    Author information: Stinde, Julius 1841-1905
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    UID:
    edochu_18452_22596
    Format: 1 Online-Ressource (32 Seiten)
    Content: Rivers are important ecosystems under continuous anthropogenic stresses. The hyporheic zone is a ubiquitous, reactive interface between the main channel and its surrounding sediments along the river network. We elaborate on the main physical, biological, and biogeochemical drivers and processes within the hyporheic zone that have been studied by multiple scientific disciplines for almost half a century. These previous efforts have shown that the hyporheic zone is a modulator for most metabolic stream processes and serves as a refuge and habitat for a diverse range of aquatic organisms. It also exerts a major control on river water quality by increasing the contact time with reactive environments, which in turn results in retention and transformation of nutrients, trace organic compounds, fine suspended particles, and microplastics, among others. The paper showcases the critical importance of hyporheic zones, both from a scientific and an applied perspective, and their role in ecosystem services to answer the question of the manuscript title. It identifies major research gaps in our understanding of hyporheic processes. In conclusion, we highlight the potential of hyporheic restoration to efficiently manage and reactivate ecosystem functions and services in river corridors.
    Content: Peer Reviewed
    In: Basel : MDPI, 11,11, Seiten -2230
    Language: English
    URL: Volltext  (kostenfrei)
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. Further information can be found on the KOBV privacy pages