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The purpose of this study was to investigate the relationships between the softness of two mobile touchscreens and three direct input devices on user's task performance and subjective evaluation for tapping tasks. In the within-subjects design, 44 participants were asked to perform tasks as quickly and accurately as possible across the six combinations. After completing tasks in each condition, they...
A promising method to overcome the efficiency limit of the crystalline Si solar cell is to utilize the visible light in the solar-energy spectrum. Silicon quantum dots (QDs) have been proposed as a source of strong light emission in the visible range based on the quantum confinement effect [1–3]. Light emission in the full visible range of wavelength has been reported by controlling the size and the...
Drawing upon actor-network theory (ANT), this study presents a case analysis for a socio-technical framework to assess Korea's strategy for the development of the ubiquitous city (u-city). The u-city initiative, a national development project, focuses on strengthening the role of information and communication technologies (ICT) in urban planning and management. Analyzing empirical materials from u-city...
Ubiquitous technologies are becoming an increasing part of people's lives. Issues and challenges for the development of such technologies not only encompass a broad spectrum of applications and services but also involve the envisioning of new policies and legislations that will change the way in which we live and work. This study provides an overview of the socio-technical vision of ubiquitous computing...
This study investigates the development, discourse, design, and social interactions within the Kutztown community network. Drawing on the theory of social construction of technology, the study employs an in-depth case study approach to investigate how the community network was designed and how the Kutztown community participated in the network development. The findings show that there was little societal...
Recently, the Korean government launched the IT839 project with the objective of converting Korea into a ubiquitous information society. This study investigates the role of the Korean government in the development of the national information infrastructure and the realization of IT839 vision. This paper reviews the historic and individual data related to the infrastructure project, draws on the social...
A new high-performance analogue-type frequency/voltage (F/V) convertor is suggested. The proposed convertor shows good linearity and low ripple in a wide range from low to medium frequency. It has great simplicity and good dynamic response as fast as a high-performance digital F/V convertor.
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