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Improving data acquisition techniques and rising computational power keep producing more and larger data sets that need to be analyzed. These data sets usually do not fit into a GPU's memory. To interactively visualize such data with direct volume rendering, sophisticated techniques for problem domain decomposition, memory management and rendering have to be used. The volume renderer Volt is used to show how CUDA is efficiently utilised to manage the volume data and a GPU's memory with the aim of low opacity volume renderings of large volumes at interactive frame rates.
Vielfalt ist unser Angebot
(2014)
Der Fachbereich Sozialversicherung der Hochschule Bonn-Rhein-Sieg blickt auf zehn erfolgreiche Jahre zurück. Seit Gründung des Fachbereichs im Jahr 2003 arbeiten Wissenschaftlerinnen und Wissenschaftler verschiedener Disziplinen auf dem Campus Hennef eng vernetzt im Untersuchungsfeld der Sozialversicherung.
In contrast to projection-based systems, large, high resolution multi-display systems offer a high pixel density on a large visualization area. This enables users to step up to the displays and see a small but highly detailed area. If the users move back a few steps they don't perceive details at pixel level but will instead get an overview of the whole visualization. Rendering techniques for design evaluation and review or for visualizing large volume data (e.g. Big Data applications) often use computationally expensive ray-based methods. Due to the number of pixels and the amount of data, these methods often do not achieve interactive frame rates.
A view direction based (VDB) rendering technique renders the user's central field of view in high quality whereas the surrounding is rendered with a level-of-detail approach depending on the distance to the user's central field of view. This approach mimics the physiology of the human eye and conserves the advantage of highly detailed information when standing close to the multi-display system as well as the general overview of the whole scene. In this paper we propose a prototype implementation and evaluation of a focus-based rendering technique based on a hybrid ray tracing/sparse voxel octree rendering approach.
Dies ist der Tagungsband zum elften aus einer Reihe erfolgreicher Workshops zum Thema Virtuelle und Erweiterte Realität, die von der Fachgruppe VR/AR der Gesellschaft für Informatik e.V. ins Leben gerufen wurde. Als etablierte Plattform für den Informations- und Ideenaustausch der deutschsprachigen VR/AR-Szene bietet der Workshop den idealen Rahmen, aktuelle Ergebnisse und Vorhaben aus Forschung und Entwicklung im Kreise eines fachkundigen Publikums zur Diskussion zu stellen. Insbesondere wollen wir auch jungen Nachwuchswissenschaftlern die Möglichkeit geben, ihre Arbeiten zu präsentieren.
This article describes an approach to rapidly prototype the parameters of a Java application run on the IBM J9 Virtual Machine in order to improve its performance. It works by analyzing VM output and searching for behavioral patterns. These patterns are matched against a list of known patterns for which rules exist that specify how to adapt the VM to a given application. Adapting the application is done by adding parameters and changing existing ones. The process is fully automated and carried out by a toolkit. The toolkit iteratively cycles through multiple possible parameter sets, benchmarks them and proposes the best alternative to the user. The user can, without any prior knowledge about the Java application or the VM improve the performance of the deployed application and quickly cycle through a multitude of different settings to benchmark them. When tested with the representative benchmarks, improvements of up to 150% were achieved.
A cost-efficient alternative to outside-in tracking systems for pointing interaction with large displays is to equip the pointing device with a camera, whose images are matched to display content. This work presents the Dynamic Marker Camera Tracking (DMCT) framework for display-based camera tracking. It accounts for typical display characteristics and uses dynamic on-screen markers overlaid to the display content that follow the camera. An example marker implementation and a tracking recovery method are presented. DMCT can measure pointing locations with sub-millimeter precision in large tracking volumes and computes 6-DoF camera poses for 3D interaction. 60 Hz update rate and 24 ms latency were achieved. DMCT's main limitation is the visible marker interfering with display content. In pointing effciency, the prototype is comparable to an OptiTrack system.
Realism and plausibility of computer controlled entities in entertainment software have been enhanced by adding both static personalities and dynamic emotions. Here a generic model is introduced that allows findings from real-life personality studies to be transferred to a computational model. Adaptive behavior patterns are enabled by introducing dynamic event-based emotions. The advantages of this model have been validated using a four-way crossroad in a traffic simulation. Driving agents using the introduced model enhanced by dynamics were compared to agents based on static personality profiles and simple rule-based behavior. The results show that adding a dynamic factor to agents improves perceivable plausibility and realism.
Improving the study entry supports students in a decisive phase of their university education. Implementing improvements is a change process and can only be successful if the relevant stakeholders are addressed and convinced. In the described Teaching Quality Pact project evaluation data is used as a mean to discuss in the university the situation of the study programs. As these discussions were based on empirical data rather than on opinion, it was possible to achieve an open discussion about measures that are implemented. The open discussion is maintained during the project when results of the measures taken are analyzed.
The contribution of the most common reciprocal translocation in childhood B-cell precursor leukemia t(12;21)(p13;q22) to leukemia development is still under debate. Direct as well as secondary indirect effects of the TEL-AML1 fusion protein are commonly recorded by using cell lines and patient samples, often bearing the TEL-AML1 fusion protein for decades. To identify direct targets of the fusion protein a short-term induction of TEL-AML1 is needed. We here describe in detail the experimental procedure, quality controls and contents of the ChIP, mRNA expression and SILAC datasets associated with the study published by Linka and colleagues in the Blood Cancer Journal [1] utilizing a short term induction of TEL-AML1 in an inducible precursor B-cell line model.
Adapting plans to changes in the environment by finding alternatives and taking advantage of opportunities is a common human behavior. The need for such behavior is often rooted in the uncertainty produced by our incomplete knowledge of the environment. While several existing planning approaches deal with such issues, artificial agents still lack the robustness that humans display in accomplishing their tasks. In this work, we address this brittleness by combining Hierarchical Task Network planning, Description Logics, and the notions of affordances and conceptual similarity. The approach allows a domestic service robot to find ways to get a job done by making substitutions. We show how knowledge is modeled, how the reasoning process is used to create a constrained planning problem, and how the system handles cases where plan generation fails due to missing/unavailable objects. The results of the evaluation for two tasks in a domestic service domain show the viability of the approach in finding and making the appropriate goal transformations.
Level-Synchronous Parallel Breadth-First Search Algorithms For Multicore and Multiprocessor Systems
(2014)
Breadth-First Search (BFS) is a graph traversal technique used in many applications as a building block, e.g.,~to systematically explore a search space. For modern multicore processors and as application graphs get larger, well-performing parallel algorithms are favourable. In this paper, we systematically evaluate an important class of parallel BFS algorithms and discuss programming optimization techniques for their implementation. We concentrate our discussion on level-synchronous algorithms for larger multicore and multiprocessor systems. In our results, we show that for small core counts many of these algorithms show rather similar behaviour. But, for large core counts and large graphs, there are considerable differences in performance and scalability influenced by several factors. This paper gives advice, which algorithm should be used under which circumstances.
Die nachhaltige Organisation des Verkehrs soll auf kostengünstige, umweltfreundliche und nutzerfreundlichere Nahverkehrskonzepte, die möglichst viele Bürger zur Nutzung des ÖPNV einladen, abzielen. Vor diesem Hintergrund ist es das Ziel dieses Beitrags, instrumentelle Ansatzpunkte für ein Nachhaltigkeitscontrolling in ÖPNV-Unternehmen aufzuzeigen. Hierzu werden nachfolgend die Berücksichtigung der Nachhaltigkeit bei Investitionsentscheidungen, das Carbon Accounting (Transparenz über CO2-Emissionen), die Integration der ökologischen, ökonomischen und sozialen Nachhaltigkeitsdimension bei der Berichterstattung und die Einbindung der genannten Instrumente in ein Managementsystem skizziert. Die Nachhaltigkeitsdimensionen Ökologie, Ökonomie und Soziales lassen sich gut mit Hilfe mehrdimensionaler, integrierter Managementsysteme in der Organisation verankern und systematisch in interne Strukturen und Prozesse einbetten. Integrierte Managementsysteme können so eine wichtige Voraussetzung für ein effizientes Nachhaltigkeitscontrolling sein.
Nachhaltigkeit als Megatrend. Die Arbeit der Weltkommission für Umwelt und Entwicklung unter Vorsitz von Brundtland machte bereits 1987 deutlich, dass v.a. das Management von Gemeingütern wie Ozeanen und der Atmosphäre, die Erhaltung des Weltfriedens, die weltweite Bevölkerungsentwicklung, die globale Ernährungssicherheit, die begrenzten Energieressourcen sowie die Folgen des Wirtschaftswachstums globale Herausforderungen darstellen, die nur durch eine nachhaltige Entwicklung gemeistert werden können.
GRI4-Guidelines
(2014)
In diesem Beitrag wird gezeigt, dass das Corporate Social Responsibility-Controlling (CSR-Controlling) im Zuge der neuen Berichterstattungsvorgaben der Global Reporting Initiative (GRI) vor neuen Herausforderungen steht. Die neue GRI-4-Version fordert über erweiterte und neue Pflichtstandardangaben die CSR-Umsetzung in höchster Niveauausprägung ein und setzt neue Maßstäbe an die CSR-Gütekriterien „Transparenz“ und „Rechenschaftslegung“ in der gesamten Supply Chain. In der Analyse werden die für den zukünftigen GRI-4-Berichtseinstieg erforderlichen Anpassungsschritte dargestellt und in einem GRI-3.1-versus-GRI-4-Vergleich indikatorenbezogen erläutert.
Purpose – The aim of the study is to investigate the implementation of corporate sustainability (CS) in the German real estate sector.
Design/methodology/approach – The authors begin by outlining the framework set by the European Union and the German Federal Government for companies wanting to be classified as sustainable. After this, the relevance of sustainability for German real estate companies is discussed. Their empirical section contains an international comparison. Finally, they present an analysis checking the implementation of CS for the main 135 German real estate companies.
Findings – The present analysis shows that German real estate companies compare well with their international counterparts, in 2012 representing 15 per cent of all real estate firms reporting on the basis of the Global Reporting Initiative. However, of the 135 companies in Germany surveyed, only a small proportion classify themselves as CS and CSR (corporate social responsibility) enterprises. This number could be rapidly increased by better documentation of companies’ commitment to sustainability.
Practical implications – The study’s importance lies in the overview it provides of CS activities in the German real estate industry. In addition, it provides hints on how companies can improve their documentation to classify as CSR enterprises. Although the analysis concentrates on Germany, the results are also relevant for companies in other European countries.
Die Formelsammlung zeigt die statistischen Formeln auf, die in den Wirtschaftswissenschaften notwendig von Bedarf sind. Sie ist interdisziplinär zielgerichtet und unterstützt sämtliche Bereiche der Ökonomik. Das Verständnis der Formeln und deren praktische Anwendung werden sinnvoll unterstützt durch nützliche Hilfen und Beispiele. Das Buch ist ein unverzichtbares Tool sowohl für den Studierenden als auch für den Verantwortlichen in Wirtschaft, Management, Verwaltung, Politik und Lehre.
Diese Formelsammlung zeigt die mathematischen Formeln auf, die in den
Wirtschaftswissenschaften notwendig von Bedarf sind. Sie ist interdisziplinär
zielgerichtet und unterstützt sämtliche Bereiche der Ökonomik. Das Verständnis der Formeln und deren praktische Anwendung werden sinnvoll unterstützt durch nützliche Hilfen und Beispiele. Das Buch ist ein unverzichtbares Tool sowohl für den Studierenden als auch für den Verantwortlichen in Wirtschaft, Management, Verwaltung, Politik und Lehre.
The case for basic human needs in coaching: A neuroscientific perspective - The SCOAP Coach Theory
(2014)
Verantwortliches Wirtschaften beschreibt die Betrachtung ökonomischer, ökologischer und sozialer Aspekte als ganzheitliches Konzept sowie deren Integration in die betriebswirtschaftliche Praxis mit dem Ziel, Wettbewerbsfähigkeit zu erhalten und Unternehmensrisiken zu minimieren. Verantwortliches Wirtschaften steht zudem für die Verpflichtung eines Unternehmens gegenüber seinen Stakeholdern sowie seiner Verantwortung gegenüber der Gesellschaft.
Masterkurs IT-Controlling
(2014)
In general, mathematics plays a central role in our lives because today mathematics regulates our everyday life with techniques, technologies and procedures, for example coding techniques for credit cards or the drafting of curves and surfaces for construction procedures [5]. Obviously, mathematics continues to be an important element of engineering education and it still represents a major obstacle for the students. Lacking the knowledge of several topics, changing learning behavior and inadequate overall conditions at universities for the repetition of school mathematics were mentioned to be causes for the constantly increasing gap between the initial level of mathematics at university and the prior knowledge of the first semester students [2].