Refine
Departments, institutes and facilities
- Fachbereich Informatik (58)
- Fachbereich Wirtschaftswissenschaften (51)
- Fachbereich Ingenieurwissenschaften und Kommunikation (31)
- Fachbereich Angewandte Naturwissenschaften (23)
- Institut für funktionale Gen-Analytik (IFGA) (20)
- Institute of Visual Computing (IVC) (20)
- Präsidium (17)
- Institut für Cyber Security & Privacy (ICSP) (15)
- Institut für Verbraucherinformatik (IVI) (9)
- Internationales Zentrum für Nachhaltige Entwicklung (IZNE) (9)
Document Type
- Article (103)
- Conference Object (71)
- Part of a Book (24)
- Book (monograph, edited volume) (21)
- Part of Periodical (19)
- Report (8)
- Lecture (6)
- Contribution to a Periodical (4)
- Master's Thesis (4)
- Conference Proceedings (2)
Year of publication
- 2013 (272) (remove)
Keywords
- Lehrbuch (6)
- Corporate Social Responsibility (3)
- Amiloride (2)
- Education (2)
- Internet (2)
- Mal d 1 (2)
- Molecular dynamics (2)
- Qualitätsmanagement (2)
- Three-dimensional displays (2)
- Virtuelle Realität (2)
Botnets
(2013)
Malware poses one of the major threats to all currently operated computer systems. The scale of the problem becomes obvious by looking at the global economic loss caused by different kinds of malware, which is estimated to be more than US$ 10 billion every year. Botnets, a special kind of malware, are used to reap economic gains by criminals as well as for politically motivated activities. In contrast to other kinds of malware, botnets utilize a hidden communication channel to receive commands from their operator and communicate their current status. The ability to execute almost arbitrary commands on the infected machines makes botnets a general-purpose tool to perform malicious cyber-activities. (Verlagsangaben)
Switched power electronic subsystems are widely used in various applications. A fault in one of their components may have a significant effect on the system’s load or may even cause a damage. Therefore, it is important to detect and isolate faults and to report true faults to a supervisory system in order to avoid malfunction of or damage to a load. If, in a model-based approach to fault detection and isolation of hybrid systems, switching devices are considered as ideal switches then some equations must be reformulated whenever some devices have switched. In this paper, a fixed causality bond graph representation of hybrid system models is used, i.e., computational causalities assigned according to the Standard Causality Assignment Procedure (SCAP) are independent of system modes of operation. The latter are taken into account by transformer moduli mi(t) ∈ {0, 1} ∀t ≥ 0 in a unique set of equations of motion. In a case study, this approach is used for fault diagnosis in a three-phase full-wave rectifier. Residuals of Analytical Redundancy Relations (ARRs) holding for all modes of operations and serving as fault indicators are computed in an offline simulation as part of a DAE system by using a bond graph model of the faulty system instead of the real one and by coupling it to a bond graph of the healthy system by means of residual sinks.
Unter Big Data wird die Echtzeitverarbeitung sehr großer Datenmengen für analytische Aufgaben verstanden. Neue Technologien und Methoden machen es möglich, bislang nicht genutzte Analyseaufgaben in kürzester Zeit durchzuführen. Der Beitrag zeigt, wie Big Data in den betriebswirtschaftlichen Kontext einzuordnen ist, welche Chancen den Unternehmen offen stehen und welche Auswirkungen dies für den Controller haben wird.
Der Wechsel vom Lehren zum aktiven Lernen kann durch studentische Projekte gelingen. Studierende wenden das bisher vermittelte Wissen an und erleben dadurch Ihre eigene Handlungskompetenz während der Bearbeitung einer berufsnahen Aufgabenstellung. Lernziel ist hierbei die Steigerung der Handlungskompetenz, bestehend aus Fach-, Sozial-, Methoden- und Individualkompetenz durch die Aufgabenbearbeitung im Team. Insbesondere wird dabei auch Wert auf die Vermittlung und Erfahrung von Skills, wie z. B. Kooperationsfähigkeit, Kommunikationsverhalten und Arbeitsorganisation gelegt.
Im gemeinsamen Verbundprojekt analysierte das IZNE die Wahrnehmung gesundheitlicher und finanzieller Wertschöpfungsaspekte des betrieblichen Mobilitätsmanagements (BMM). Hierzu wurden 178 Betriebe schriftlich und 22 Betriebsleiter in persönlichen Interviews zu Maßnahmen der betrieblichen Gesundheitsförderung (BGF) sowie 1.341 Arbeitnehmer aus 14 Unternehmen im Raum Bonn zu ihrem Mobilitätsverhalten befragt. Die Einschätzung der tatsächlichen Existenz und des gesundheitlichen und wirtschaftlichen Nutzens des BMM sollte Bedarf und Optimierungspotentiale erkennbar machen.
Benchmarking
(2013)
Distributed systems comprise distributed computing systems, distributed information systems, and distributed pervasive systems. They are often very complex and their implementation is challenging. Intensive and continuous testing is indispensable to ensure reliability and high quality of a distributed system. The testing process should have a high degree of automation, not only on lower levels (i.e. unit and module testing), but also on higher testing levels (e.g. system, integration, and acceptance tests). To achieve automation on higher testing levels virtual infrastructure components (e.g. virtual machines, virtual networks) that are offered as a Service (IaaS) can be employed. The elasticity of on-demand computation resources fits well together with the varying resource demands of automated test execution.
A methodology for automated acceptance testing of distributed systems that uses virtual infrastructure is presented. It is founded on a task-oriented model that is used to abstract concurrency and asynchronous, remote communication in distributed systems. The model is used as groundwork for a domain-specific language that allows expressing tests for distributed systems in the form of scenarios. On the one hand, test scenarios are executable and, therefore, fully automated. On the other hand, test scenarios represent requirements to the system under test making an automated, example-based verification possible.
A prototypical implementation is used to apply the developed methodology in the context of two different case studies. The first case study uses RCE as an example of a distributed, workflow-driven integration environment for scientific computing. The second one uses MongoDB as an example of a document-oriented database system that offers distributed data storage through master-slave replication. The results of the experimental evaluation indicate that the developed acceptance testing methodology is a useful approach to design, build, and execute tests for distributed systems with high quality and a high degree of automation.
Within an elementary decision of March 28th, 2006 the German Federal Constitutional Court implemented the following: “According to the status quo of research it is certain, that gambling and bets can result in morbid addictive behaviour. ... However different gambling products exhibit different addictive potentials.” Up to now a specific identification of the addictive potential of a concrete gambling product was nearly impossible. This being said, the Wissenschaftliches Forum Glücksspiel (Gambling Scientific Forum) developed a globally applicable assessment tool to measure and evaluate the risk potential of gambling products.
AsTERiG is developed by the Gambling Scientific Forum in the years 2006-2010. At the completion of this final version as well as in the composition of this survey the following scientists were involved: Prof. Dr. Reiner Clement, Bonn-Rhein-Sieg University; Prof. Dr. Jörg Ennuschat, University of Konstanz; Prof. Jörg Häfeli, Lucerne University of Applied Sciences and Arts; Prof. Dr. Gerhard Meyer, University of Bremen; Chantal Mörsen, Charité Berlin; Prof. Dr. Dr. Franz W. Peren, Bonn-Rhein-Sieg University; Prof. Dr. Wiltrud Terlau, Bonn-Rhein-Sieg University.
Although most individuals who gamble do so without any adverse consequences, some individuals develop a recurrent, maladaptive pattern of gambling behaviour, often called pathological gambling or gambling disorder, that is associated with financial losses, disruption of family and interpersonal relationships, and co-occurring psychiatric disorders. Identifying whether different types of gambling modalities vary in their ability to lead to maladaptive patterns of gambling behaviour is essential to develop public policies that seek to balance access to gambling opportunities with minimizing risk for the potential adverse consequences of gambling behaviour. Until recently, assessing the risk potential of different types of gambling products was nearly impossible. ASTERIG, initially developed in Germany in 2006-2010, is an assessment tool to measure and to evaluate the risk potential of any gambling product based on scores on ten dimensions. In doing so, it also allows a comparison to be drawn between the addictive potential of different gambling products. Furthermore, the tool highlights where the specific risk potential of each specific gambling product lies. This makes it a valuable tool at the legislative, case law, and administrative levels as it allows the risk potential of individual gambling products to be identified and to be compared globally and across 10 different dimensions of risk potential. We note that specific gambling products should always be evaluated rather than product groups (lotteries, slot machines) or providers, as there may be variations among those product groups that impact their risk potential. For example, slot machines may vary on the amount of jackpot, which may influence their risk potential.
Application performance improvements through VM parameter modification after runtime analysis
(2013)
Annual Report 2011 - 2012
(2013)
Angewandte Makroökonomie
(2013)
Makroökonomische Ereignisse wie die Schuldenkrise, Rezession, Arbeitslosigkeit und Inflation haben nicht nur gesamtwirtschaftliche Konsequenzen, sondern auch vielfältige Berührungspunkte zum täglichen Leben. Diese Ereignisse sind häufig komplex und für den Einzelnen nicht immer leicht zu durchschauen. Um Studierende auf die globalen Herausforderungen von Wirtschaft, Gesellschaft und Umwelt vorzubereiten ist in diesem Lehrbuch explizit auch das Thema der nachhaltigen Entwicklung integriert. Außerdem werden die großen Themen der Makroökonomie teilweise gebündelt behandelt, um die vielfältigen Zusammenhänge zwischen den einzelnen Gebieten transparenter zu gestalten. Dies hat für Studierende und Lehrende u.a. den Vorteil, dass eine modulare Verwendung möglich ist.