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Collaborative learning technology has been widely applied in various disciplines in support of dialectical discourse and argumentation. Technologies not only allow multiple users to concurrently analyze and edit documents in the same virtual space but also present richer cues for collaboration awareness. However, researchers still know very little about how the synching mechanisms work together to...
Through a combination of wearable cameras, hardware accelerators, and algorithms, a vision-based automatic shopping assistant allows users with limited or no sight to select products from grocery shelves.
Shear wave properties of ocean bottom sediments are of great importance for sonar system performance. The frequency dependence of attenuation in the sediment is a subject of intensive investigations by a number of researchers and institutions. One of the key components of the attenuation is the conversion of acoustic energy into shear waves at interfaces including the seafloor. In addition to its...
Service coproductions are reciprocal activities with no sharp boundary between providers and recipients; instead, all participants collaborate to enact the service. User participation is validated by recognition instead of extrinsic economic exchange. Mobility and context awareness can be crucial for successful coproductions.
Electromagnetic (EM) simulation and modeling are a growing and indispensable part of the Radio Frequency Integrated Circuit (RFIC) design industry. The percentage of EM simulation content in high-frequency designs is continually increasing to the level where examples of full chip simulation are becoming more common. The growth of EM simulations in the RF design flow creates many significant challenges...
Capturing, uploading, and presenting social media content online have become the standard way for people to share their experiences with friends, family members, and others. In this paper, we describe our effort to extract, aggregate, and visualize, in a smartphone app, real-time and historical hyperlocal social media discussions and photos created at a regional arts festival that attracted over 100,000...
Tunable capacitors are increasingly important components in today’s state of the art RF front ends. They enable a degree of tuning and configurability that is essential in today’s multiband multimode handsets. SOI technology is the technology of choice due to the combination of the high degree of integration, high performance and low cost. This paper highlights some of the techniques and tradeoffs...
In order to provide increasing data rates demanded by the consumer market, the 4G RF cellular front-end is becoming increasingly complex with numerous transmit and receive bands, the possibility of multiple antennas and new architectures which involves Uplink and Downlink carrier aggregation. Such new architectures present extreme challenges for conventional fixed band systems composed of PAs, switches...
To better understand end users' security compliance behaviors, we designed an experimental study to investigate how fear appeals and point of reference manipulations could influence end users' security behavioral intentions. The findings suggest that fear appeals and point of reference collectively influence users' perceived persuasiveness of the IT security communication messages. Specifically, higher...
In order to provide increasing data rates demanded by the consumer market, the 4G RF cellular front-end is becoming increasingly complex with numerous transmit and receive bands, the possibility of multiple antennae and new architectures which involves Uplink and Downlink carrier aggregation. Such new architectures present extreme challenges for conventional fixed band systems composed of PA's, switches...
In today's world of increasing scarcity of resources and economic stagnation, we still see rapid developments in computer science and user experience towards increasingly mobile, intelligent and context-aware computing systems. These innovations represent a new frontier for transformative innovation on a societal level. They hold the promise of breakthroughs in how people can collaborate through dynamically...
Effective regulation of joint activity requires awareness of and coordination with partners at many levels. Our research focuses on understanding and supporting awareness in relatively large and complex activities such as emergency management, software development, information analysis, and education. We describe patterns and issues in the development of activity awareness, and approaches to supporting...
This paper presents an interview study of how social network communication media, Facebook specifically, can facilitate and influence proximal communities. We investigated scenarios in which users integrated their online interactions with offline activities. We found that Facebook heightened the visibility of social identities, but that these identities are multifaceted and dynamically modulated by...
Open source is an important model of collaborative knowledge work and virtual organizations. One of its work practices, peer review, is considered critical to its success, as Linus's law highlights. Thus, understanding open source peer review, particular effective review practices, will improve the understanding of how to support collaborative work in new ways. Therefore, we conduct case studies in...
Virtual organizations are increasingly pervasive in knowledge work, despite significant challenges with respect to support for common ground, member awareness, sense of community, work coupling, incentives, and other issues. Understanding how specific sociotechnical affordances of VOs can enhance effectiveness in new and distinctive ways will improve our understanding of virtual organizations, and...
We describe the evolutionary development of an online community system designed to support a devel-opmental learning community of women - wConnect. The goal of this community is to engage, connect and support women at different developmental levels with respect to education and career goals in the computer and information sciences. We chronicle the system's development through design rationale motivated...
Student engagement is a pervasive and persistent goal for educators. In previous work we have reported that activities like public real-time commenting on videos can enhance student participation and engagement. However, these events occur over a limited period of time. Thus a more challenging question is how to increase and sustain student engagement. In this paper we describe the iterative development...
Computational Intelligence (CI) techniques have been widely used in the domains of computer security and computer forensics. One problem that normative discussions of technologies face is that the technical capabilities under investigation tend to be unclear and that the experts in normative questions don't tend to be experts in technical developments and vice versa. The present paper therefore sets...
In the design and implementation of interactive systems, teams typically consider and debate multiple perspectives, for instance exploring objects comprising a problem domain, the user population, and current technologies that might be useful. In this paper we report a field trial of our approach to using analysis and design activities as an integrating framework for introducing introductory students...
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