In the area of process mining, efficient alignment-based conformance checking is a hot topic. Existing approaches for conformance checking are typically monolithic and compute exact fitness values. One limitation with...
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In the area of process mining, efficient alignment-based conformance checking is a hot topic. Existing approaches for conformance checking are typically monolithic and compute exact fitness values. One limitation with monolithic approaches is that it may take a significant amount of computation time in large processes. Alternatively, decomposition approaches run much faster but do not always compute an exact fitness value. This paper presents the tool Replay using Recomposition which returns the exact fitness value and the resulting alignments using the decomposition approach in an iterative manner. Other than computing the exact fitness value, users can configure the balance between result accuracy and computation time to get a fitness interval within set constraints, e.g., "Give me the best fitness estimation you can find within 5 minutes".
In this paper, we study the lifetime op- timization problem in wireless sensor networks using mo- bile sink nodes. This problem is inherently difficult since we need to consider both sink scheduling and data rout- ing...
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In this paper, we study the lifetime op- timization problem in wireless sensor networks using mo- bile sink nodes. This problem is inherently difficult since we need to consider both sink scheduling and data rout- ing. Through a simple case study we develop a novel no- tation named the Placement pattern (PP) to bound traffic patterns with candidate locations. This significantly de- creases the number of elements needed to be scheduled. Based on the PP, we mathematically formulate this opti- mization problem as a Mixed-integer non-linear program- ming (MINLP), which is very tough and time consuming to solve. By proving that the problem is NP-complete, we point out that instead of seeking an optimal algorithm, heuristic algorithms, especially those with performance guarantee, would be much more desirable to develop. Fur- thermore, in order to help identify performance gains of heuristic algorithms proposed in the future, we develop a Linear programming (LP) formulation which serves as an upper bound by adopting a reformulation and relaxation technique.
Magic lens and static peephole interfaces are used in numerous consumer mobile phone applications such as Augmented Reality browsers, games or digital map applications in a variety of contexts including public spaces....
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ISBN:
(纸本)9781450311052
Magic lens and static peephole interfaces are used in numerous consumer mobile phone applications such as Augmented Reality browsers, games or digital map applications in a variety of contexts including public spaces. Interface performance has been evaluated for various interaction tasks involving spatial relationships in a scene. However, interface usage outside laboratory conditions has not been considered in depth in the evaluation of these interfaces. We present findings about the usage of magic lens and static peephole interfaces for playing a find-and-select game in a public space and report on the reactions of the public audience to participants? interactions. Contrary to our expectations participants favored the magic lens over a static peephole interface despite tracking errors, fatigue and potentially conspicuous gestures. Most passersby did not pay attention to the participants and vice versa. A comparative laboratory experiment revealed only few differences in system usage. Copyright 2012 ACM.
Graph theory is a fundamental tool in the study of economic issues, and input–output tables are one of the main examples. We use the interpretation of the labour market through networks to obtain a better understandi...
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Networks of Workstations (NOWs) are usually arranged as a set of interconnected switches with hosts connected to switch ports through interface cards. Several commercial interconnects for high-speed NOWs use up✶/down✶...
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Wireless Body Area Network (WBAN) is a vital application of the Internet of Things (IoT) that plays a significant role in gathering a patient's healthcare information. This collected data helps special professiona...
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Digital campus is one important part to the digital earth and Internet of Things. Based on the analysis of the LBS performance, structure, function and the present research status of digital campus we propose a digita...
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The first decade of the twenty first century is witnessing the convergence of three strands of development in e-learning which had relatively independent origins during the 1990s. The first strand is rise of e-learnin...
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The first decade of the twenty first century is witnessing the convergence of three strands of development in e-learning which had relatively independent origins during the 1990s. The first strand is rise of e-learning technology as a recognized industry. This was fostered by the rise of the Internet and the widespread adoption of e-learning software and courses, especially Learning Management Systems such as WebCT and Blackboard in the education sector, and PWUTVU, Click2Learn, and others in corporate training. This strand grew predominantly from software innovation around proprietary e-learning systems which found its way into the wider market through venture capital investment. The second strand arose from attempts to create open standards for e-learning software and content, driven by specification organizations such as IMS Global Learning Consortium, AICC and ADL, and relevant committees of international standards bodies such as the IEEE LTSC. Despite the potential relevance of these open standards for the proprietary e-learning systems of the first strand, the consistent adoption of e-learning standards by LMS vendors was slow, particularly in the education sector. There have been exceptions which crossed the boundaries between the strands identified above. However, during the late 1990s the major impact of each strand tended to occur without respect to the others. E-learning technology rose to fame largely without standards or open source software;e-learning standards were initially developed without widespread vendor adoption or open source software examples. While the open source community focused its major efforts at basic infrastructure such as operating systems and web servers, examples such as Moodle10provide a SCORM add-in module. User can use some external applications to create SCORM compliant materials for Moodle. The production of educational multimedia content to be distributed by e-learning systems is growing in every context. The competition amo
Co-evolution is a posible solution to the problem of simultaneous optimization of artificial neural network and training agorithm parameters, due to its ability to deal with vast search spaces. Moreover, this scheme i...
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Fossil fuels and air pollution are significant problems nowadays, causing many countries to increase their investments in renewable energy development. As the world's energy demand grows, governments are looking i...
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