Rosli, Faird ; Elhossini, Ahmed ; Juurlink, Ben (2015)
Rapid development of the Field Programmable Gate Array (FPGA) offers an alternative way to provide acceleration for computationally intensive tasks such as digital signal and image processing. Its ability to perform parallel processing shows the potential in implementing a high speed vision system. Out of numerous applications of computer vision, this paper focuses on the hardware implementatio...High performance CCSDS image data compression using GPGPUs for space applications
Ramanarayanan, Sunil Chokkanathapuram ; Manthey, Kristian ; Juurlink, Ben (2015)
The usage of graphics processing units (GPUs) as computing architectures for inherently data parallel signal processing applications in this computing era is very popular. In principle, GPUs in comparison with central processing units (CPUs) could achieve significant speed-up over the latter, especially considering data parallel applications which expect high throughput. The paper investigates ...Lernen von Sensormesswerten zur Verbesserung von Fahrerassistenzsystemen am Beispiel eines adaptiven Kurvenwarners
Heinrichs, Robert (2018)
Today, Advanced Driver Assistance Systems are a central part of vehicles and improve safety and comfort. Especially in the safety area, Advanced Driver Assistance Systems have a significant positive impact, which is visible in accident statistics. With sensors and actuators Advanced Driver Assistance Systems can capture the vehicles state and its surroundings, and can intervene if necessary, s...Proximity Scheme for Instruction Caches in Tiled CMP Architectures
Alawneh, Tareq ; Chi, Chi Ching ; Elhossini, Ahmed ; Juurlink, Ben (2015)
Recent research results show that there is a high degree of code sharing between cores in multi-core architectures. In this paper we propose a proximity scheme for the instruction caches, a scheme in which the shared code blocks among the neighbouring L2 caches in tiled multi-core architectures are exploited to reduce the average cache miss penalty and the on-chip network traffic. We evaluate t...Distributed enterprise search using software agents
Gunadi, Erwin ; Meder, Michael ; Plumbaum, Till ; Scheel, Christian ; Hopfgartner, Frank ; Albayrak, Sahin (2014)
In this paper we introduce a distributed information retrieval system using agent-based technology. In this multi-agent system, each agent has its own specific task and can be used to handle a specific document repository. The system is designed to automatically comply with access restriction rules that are normally enforced in companies. It is used in the administration offices of the German c...A Benchmark Suite for Evaluating Parallel Programming Models
Andersch, Michael ; Juurlink, Ben ; Chi, Chi Ching (2011)
The transition to multi-core processors enforces software developers to explicitly exploit thread-level parallelism to increase performance. The associated programmability problem has led to the introduction of a plethora of parallel programming models that aim at simplifying software development by raising the abstraction level. Since industry has not settled for a single model, however, multi...Report on the SIGIR 2013 workshop on benchmarking adaptive retrieval and recommender systems
Castells, Pablo ; Hopfgartner, Frank ; Said, Alan ; Lalmas, Mounia (2013)
In recent years, immense progress has been made in the development of recommendation, retrieval, and personalisation techniques. The evaluation of these systems is still based on traditional information retrieval and statistics metrics, e.g., precision, recall and/or RMSE, often not taking the use-case and situation of the actual system into consideration. However, the rapid evolution of recomm...A Visualization Tool for Violent Scenes Detection
Maniry, Dominique ; Acar, Esra ; Hopfgartner, Frank ; Albayrak, Sahin (2014)
We present a browser-based visualization tool that allows users to explore movies and online videos based on the violence level of these videos. The system offers visualizations of annotations and results of the MediaEval 2012 Affect Task and can interactively download and analyze content from video hosting sites like YouTube.Users' reading habits in online news portals
Esiyok, Cagdas ; Kille, Benjamin ; Jain, Brijnesh-Johannes ; Hopfgartner, Frank ; Albayrak, Sahin (2014)
The aim of this study is to survey reading habits of users of an online news portal. The assumption motivating this study is that insight into the reading habits of users can be helpful to design better news recommendation systems. We estimated the transition probabilities that users who read an article of one news category will move to read an article of another (not necessarily distinct) news...Shedding light on a living lab: the CLEF NEWSREEL open recommendation platform
Brodt, Torben ; Hopfgartner, Frank (2014)
In the CLEF NEWSREEL lab, participants are invited to evaluate news recommendation techniques in real-time by providing news recommendations to actual users that visit commercial news portals to satisfy their information needs. A central role within this lab is the communication between participants and the users. This is enabled by The Open Recommendation Platform (ORP), a web-based platform w...The Video Browser Showdown: a live evaluation of interactive video search tools
Schöffmann, Klaus ; Ahlström, David ; Bailer, Werner ; Cobârzan, Claudiu ; Hopfgartner, Frank ; McGuinness, Kevin ; Gurrin, Cathal ; Frisson, Christian ; Le, Duy-Dinh ; Del Fabro, Manfred ; Bai, Hongliang ; Weiss, Wolfgang (2014)
The Video Browser Showdown evaluates the performance of exploratory video search tools on a common data set in a common environment and in presence of the audience. The main goal of this competition is to enable researchers in the field of interactive video search to directly compare their tools at work. In this paper, we present results from the second Video Browser Showdown (VBS2013) and desc...Semantic decomposition and marker passing in an artificial representation of meaning
Fähndrich, Johannes (2018)
The research area of Distributed Artificial Intelligence aims at building intelligent agent systems. Multi-Agent Systems have been applied successfully in many domains, from an intermodal planning domain to cascading security thread simulations. But still, agents struggle with the meaning of concepts used in language. Intelligence needs language to form thoughts. Thus, the challenge addressed i...Reliability assessment of lead- free solder joint, based on high cycle fatigue & creep studies on bulk specimen
Thambi, Joel Luther (2018)
The advancement in the electronic technology, have produced smaller and smaller devices that handle ever increasing amounts of power and heat, the micro structural integrity of wire bonds, micro-terminals and solder joints become increasingly important. This is underscored by the fact that the majority of field failures of electronic modules are physical and structural in nature, mostly related...Overview of CLEF NEWSREEL 2014: news recommendation evaluation labs
Kille, Benjamin ; Brodt, Torben ; Heintz, Tobias ; Hopfgartner, Frank ; Lommatzsch, Andreas ; Seiler, Jonas (2014)
This paper summarises objectives, organisation, and results of the first news recommendation evaluation lab (NEWSREEL 2014). NEWSREEL targeted the evaluation of news recommendation algorithms in the form of a campaignstyle evaluation lab. Participants had the chance to apply two types of evaluation schemes. On the one hand, participants could apply their algorithms onto a data set. We refer to ...User-item reciprocity in recommender systems: incentivizing the crowd
Said, Alan ; Larson, Martha ; Tikk, Domonkos ; Cremonesi, Paolo ; Karatzoglou, Alexandros ; Hopfgartner, Frank ; Turrin, Roberto ; Geurts, Joost (2014)
Data consumption has changed significantly in the last 10 years. The digital revolution and the Internet has brought an abundance of information to users. Recommender systems are a popular means of finding content that is both relevant and personalized. However, today's users require better recommender systems, able of producing continuous data feeds keeping up with their instantaneous and mobi...Providing multilingual access to health-related content
Plumbaum, Till ; Narr, Sascha ; Eryilmaz, Elif ; Hopfgartner, Frank ; Klein-Ellinghaus, Funda ; Reese, Anna ; Albayrak, Sahin (2014)
Finding health-related content is not an easy task. People have to know what to search for, which medical terms to use, and where to find accurate information. This task becomes even harder when people such as immigrants wish to find information in their country of residence and do not speak the national language very well. In this paper, we present a new health information system that allows u...When to recommend What? A study on the role of contextual factors in IP-based TV services
Yuan, Jing ; Sivrikaya, Fikret ; Marx, Stefan ; Hopfgartner, Frank (2014)
Today’s IP-based TV services commonly strive for personalizing their content offers using complex recommendation systems to match their users’ interests. These systems try to capture the relevance of content recommended to a user, which may also depend on many contextual factors such as time, location, or social company. Nevertheless, in most cases, these factors are either omitted or integrate...Effective radiant flux for non-image forming effects – is the illuminance and the melanopic irradiance at the eye really the right measure?
Broszio, Kai ; Knoop, Martine ; Niedling, Mathias ; Völker, Stephan (2017-09-18)
Research indicates that intrinsically photosensitive retinal Ganglion Cells are not evenly distributed or evenly sensitive throughout the retina. Still, most research looking into non-image forming (NIF) effects uses an integral measured quantity, illuminance or melanopic weighted irradiance, to represent the amount of light at the participants’ eye level. This paper describes a theoretical app...Nicht-visuelle Beleuchtung: Reichen integrale Messgrößen aus?
Broszio, Kai ; Niedling, Mathias ; Knoop, Martine ; Völker, Stephan (2017-09-09)
Nicht-visuelle Effekte von Licht und deren Anwendung z. B. im Rahmen von Human Centric Lighting werden in der Lichttechnik zunehmend wichtig. Bereits seit langem bestehen Hinweise auf die Beeinflussbarkeit des circadianen Rhythmus durch Licht. Aber erst seit Entdeckung der retinalen photosensitiven Ganglienzellen (ipRGC) wurde es möglich, ihre Empfindlichkeitsfunktion und ihren Einfluss auf die...On deterministic models for capacity approximations in interference networks and information theoretic security
Fritschek, Rick (2018)
This work considers two major challenges of modern wireless communication. The first challenge is the analysis and management of interference in multi-user wireless channels. The other challenge is to provide information-theoretic security for future wireless networks. The second chapter considers the first challenge, in particular, the Gaussian interfering multiple access channel (G-IMAC). Thi...
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