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Aim-assistance techniques have been shown to work for player balancing in 2D environments, but little information exists about how well these techniques will work in a 3D FPS game. We carried out three studies of the performance of five different aim assists in an Unreal-based game world. The assist...
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Patients typically undergo physiotherapy with the help of a physiotherapist who teaches, guides, and corrects the patients as they perform exercises. It would be nice if people could repeat these exercises at home, potentially improving their recovery rate. However, without guidance and/or correctiv...
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In this paper we study the language of the words that, for a given language L, distinguish between pairs of different left-quotients of L. We characterize this distinguishability operation, show that its iteration has always a fixed point, and we generalize this result to operations derived from clo...
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Localization in mobile networks is of paramount importance to a variety of pervasive applications. Due to the limitations of GPS, such as high deployment cost, many researchers have devised a variety of different localization schemes based on the measurements of connectivity or distance between neig...
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Data surrounds each and every one of us in our daily lives, ranging from exercise logs, to archives of our interactions with others on social media, to online resources pertaining to our hobbies. There is enormous potential for us to use these data to understand ourselves better and make positive ch...
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In competitive games where players' skill levels are mis-matched, the play experience can be unsatisfying for both stronger and weaker players. Player balancing provides assistance for less-skilled players in order to make games more competitive and engaging. Although player balancing can be seen in...
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Many web - based information - seeking tasks are set in a social context where other people’s knowledge and advi ce improves success in finding information. However, when tightly - knit contacts (friends, family, colleagues) are not available, information seeking becomes more difficult. Inspired b...
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This paper presents a novel method to study the evolution of Linux kernel components using complex networks to understand how Linux kernel components evolve over time. After analyzing the node degree distribution, clustering coefficient, and average path length of the call graphs corresponding to th...
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Inspired by the backbone concept in wired networks, virtual backbone is expected to bring substantial benefits to routing in wireless sensor networks (WSNs). Virtual backbone construction based on Connected Dominating Set (CDS) is a competitive approach among the existing methods used to establish v...
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Data gathering in sensor networks is required to be efficient, adaptable and robust. Recently, compressive sensing (CS) based data gathering shows promise in meeting these requirements. Existing CS-based data gathering solutions require that a transform that best sparsifies the sensor readings shoul...
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Background: Piscine reovirus (PRV) is a newly discovered fish reovirus of anadromous and marine fish ubiquitous among fish in Norwegian salmon farms, and likely the causative agent of heart and skeletal muscle inflammation (HSMI). HSMI is an increasingly economically significant disease in Atlantic ...
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Pointing at displays from a distance is becoming a common method of interacting with computer applications and entertainment systems, using devices such as the Wii Remote, the PlayStation Move controller, or the Microsoft Kinect. These systems often implement relative forms of ray-cast pointing,...
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Information seeking on the Web has become a central part of many daily activities. Even though information seeking is extremely common, there are many times when these tasks are unsuccessful, because the information found is less than ideal or the task could have been completed more efficiently. In...
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Crisis command centres often gather data from disparate locations and collect it for visualization on a large, shared screen. However, the resulting visualization often lacks expressiveness: it fails to express nuanced mediating characteristics about the information, such as speci...
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Most searchers do not know how to use Web search engines as effectively as possible. This is due, in part, to search engines not providing feedback about how search behavior can be improved. Because feedback is an essential part of learning, we created the Search Dashboard, which provides an int...
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When searching for information, people often seek help from others. However, while people can benefit from communicating with others, they can usually satisfy their information needs, to some degree, without help. Because establishing explicit collaborations...
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Interactive systems often require calibration to ensure that input and output are optimally configured. Without calibration, user performance can degrade (e.g., if an input device is not adjusted for the user's abilities), errors can increase (e.g., if color spaces are not matched), and som...
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Steering and driving tasks – where the user controls a vehicle or other object along a path – are common in many simulations and games. Racing video games have provided users with different views of the visual environment – e.g., overhead, first-person, and third-person views. Although researc...
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Petri net modeling enables us to verify the protocol of interest formally. However, aside from formal verification, a new protocol really needs to be tested in a relatively realistic environment in which it interworks (or at least co-exists) with earlier or different versions of the same or similar ...
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In games where skills such as targeting are critical to winning, it is difficult for players with different skill levels to have a competitive and engaging experience. Although several mechanisms for accommodating different skill levels have been proposed, traditional approaches can be too obvio...
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Guidelines for designing information charts (such as bar charts) often state that the presentation should reduce or remove 'chart junk' - visual embellishments that are not essential to understanding the data. In contrast, some popular chart designers wrap the presented data in detaile...
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Today's technology-enhanced learning practices cater to students and teachers who use many different learning tools and environments and are used to a paradigm of interaction derived from open, ubiquitous, and socially oriented services. In this context, a crucial issue for education system...
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Users of social bookmarking systems take advantage of pivot browsing, an interaction technique allowing them to easily refine lists of bookmarks through the selection of filter terms. However, social bookmarking systems use one-size-fits-all ranking metrics to order refined lists. These generic ...
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Usage data logged from user interactions can be extremely valuable for evaluating software usability. However, instrumenting software to collect usage data is a time-intensive task that often requires technical expertise as well as an understanding of the usability issues to be explored. We have...
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This paper describes work we have done over the past five years in developing e-
learning applications and tools using Semantic Web and Web 2.0 technologies. It does not
provide a comprehensive description of these tools; instead, we focus on the pitfalls we have
encountered and attemp...