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With a finite number of samples drawn from one of two possible distributions sequentially revealed, an opportunistic detection rule is proposed, which possibly makes an early decision in favor of the alternative hypothesis, while always deferring the decision of the null hypothesis until collecting all the samples. Properties of this opportunistic detection rule are discussed and its key asymptotic...
Many multi-core processors employ a large last-level cache (LLC) shared among the multiple cores. Past research has demonstrated that traditional LRU and its approximation can lead to poor performance and unfairness when the multiple cores compete for the limited LLC capacity, and is susceptible to thrashing for memory-intensive workloads that have a working set greater than the available cache size...
Dataflow methods are widely used for the design and implementation of signal processing functionality in cyber-physical systems. Systematically integrating instrumentation methods into dataflow-based design processes is important to facilitate trade-off assessment and tuning of alternative scheduling strategies. Such instrumentation-driven scheduler development is particularly important for dynamically...
Novel microcavity plasma jet devices operating at atmospheric gas pressure have been fabricated in a flexible, robust and optically transparent polymer. By a micromolding process, large scale arrays of microcavities, each having a diameter of hundreds of microns and embedded electrodes, have been fabricated with various form factors that can be precisely controlled.
This paper presents a scenario to enrich children's experiences during a museum visit by implicitly guiding them through the exhibition space via a collaboratively created, topic related questionnaire. At the end of the visit, a personalised virtual museum catalogue can be created. This allows children to access data about the subjects they were most interested in during their visit and re-use it...
Plasma propagation in a microplasma channel having the form of a spiral has been studied in the rare gases and gas mixtures. Microchannels having widths of 200–300 µm, and a length-to - width aspect ratio of ∼103∶1, have been fabricated in nanoporous Al2O3 by a sequence of wet chemical and micropowder machining processes, Produced from 125–250 µm thick aluminum foil, these channels are situated in...
The start-oscillation-current of a gyro-TWT determines the stable operating current level of the device. The amplifier is susceptible for oscillations when the operating current level is higher than the start-oscillation current. There are several ways of calculating the start-oscillation current, including using the linear theory of a gyro-TWT. In this paper, we present a simple way of determining...
This panel is aimed at discussing the main challenges raised during the development and operation of cyber-physical systems that have to fulfill stringent dependability and security requirements, considering various application domains where physical devices interact with human-users. The discussion will also address current solutions and future research directions to cope with these challenges.
Linguistic summarization of time series can glean meaningful information from huge amounts of data. However, in situations like continuous monitoring, even linguistic summaries become difficult for a person to understand. In this paper, we develop an approach to generate linguistic prototypes from a group of time blocks that represent a normal condition. Then the set of summaries for new time blocks...
Recently, a quaternary sequence with optimal autocorrelation property is proposed by applying inverse Gray mapping to a pair of binary Sidel'nikov sequences. This quaternary sequence has even period and the maximum nontrivial autocorrelation magnitude is Rmax = 2, which is optimal and is the first quaternary sequences having Rmax = 2 for N ≡ 0 mod 4. In this paper, we present a closed-form representation...
We investigate the use of care-receiving robot (CRR) for the purpose of supporting childhood education. In contrast to the conventional teaching agents that are designed to play the role of human teachers or caregivers, the robot here receives cares from children. We hypothesize that by using this CRR, we may construct a new educational framework whose goal is to promote children's spontaneous learning...
A 2 × 2 between-subjects experiment was conducted to examine the effects of the type of artificial agent (robot vs. computer) and the role of the agent (ally vs. enemy) on people's perceptions and evaluations of the agent when playing a video game. Participants perceived that playing the game with a robot was more enjoyable and easier than playing with a computer. Regardless of the agent type, participants...
Extraordinary rays in a hyperbolic metamaterial behave as particle world lines in a three dimensional (2+1) Minkowski spacetime. We analyze electromagnetic field behavior at the boundaries of this effective spacetime depending on the boundary orientation.
Regarding the future usage of social robots in workplace scenarios, we addressed the question of potential mere robotic presence effects on human performance. Applying the experimental social facilitation paradigm in social robotics, we compared task performance of 106 participants on easy and complex cognitive and motoric tasks across three presence groups (alone vs. human present vs. robot present)...
This paper investigates the phenomenon of unethical use of information technology (IT) by developing and testing a model that postulates multiple influencing factors of unethical IT use. Results from two studies of young adult participants in USA and Finland show that unethical IT use is primarily influenced by social (e.g., subjective norms), situational (e.g., moral intensity), and technological...
In this work we study cache peak temperature variation under different cache access patterns. In particular we show that unbalanced cache access results in higher cache peak temperature. This is the result of frequent accesses made to overused cache sets. Moreover we study cache peak temperature under cache access balancing techniques and show that exploiting such techniques not only reduces cache...
Computer Science is recognized as a young growing field compared with many other sub-degree and even undergraduate programs. Recently, many educators in this field teaching in community college as well as university have been recommended to redesign and restructure the program studies according to outcome-based teaching and learning approach. However, the issues related to how to define objectives...
SCORE 2011 is the second iteration of a team-oriented software engineering contest that attracts student teams from around the world, culminating in a final round of competition and awards at ICSE. Each team has responded to one of the project proposals provided by the SCORE program committee, usually in the context of a software engineering project course. In this second iteration we have built on...
Complex applications are usually modeled as workflows, which are often represented by Directed Acyclic Graph (DAG) and require the power of Grid to run efficiently. Cost-optimized workflow scheduling under deadline constraints is a fundamental and intractable problem on Grids. In this paper, an effective and efficient heuristic for workflow scheduling is proposed. A mixed integer programming (MIP)...
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