DSpace Collection:

Orientation Responsive Touch Interaction

Thu, 01 Jan 2009 00:00:00 GMT

Title: Orientation Responsive Touch Interaction Authors: Kim, Jinwook; Ahn, Jong-gil; Ko, Heedong Abstract: A novel touch based interaction method by use of orientation information of a touch region is proposed. To capture higher dimensional information Of touch including a position and an orientation as well, we develop robust algorithms to detect a contact shape and to estimate its orientation angle. Also we suggest practical guidelines to use Our method through experiments considering various conditions and show possible service scenarios of aligning documents and controlling a media player.

Bilateral Filtered Shadow Maps

Thu, 01 Jan 2009 00:00:00 GMT

Title: Bilateral Filtered Shadow Maps Authors: Kim, Jinwook; Kim, Soojae Abstract: We present a novel shadow smoothing algorithm using the bilateral filter. From the observation that shadow leaking; which is found often in filter based approaches; occurs at depth discontinuity seen from the viewpoint of the eye; we apply the bilateral filter which is conceptually a product; of two Gaussian filters, one for smoothing the shadow map and the other for handling depth discontinuity. Consequently the bilateral filtered shadow maps can smooth the shadow boundaries effectively and do not suffer from shadow leaking artifacts.

Evaluation of User Reputation on YouTube

Thu, 01 Jan 2009 00:00:00 GMT

Title: Evaluation of User Reputation on YouTube Authors: Han, Yo-Sub; Kim, Laehyun; Cha, Jeong-Won Abstract: In the Web 2.0 era, people not only read web contents but upload, view, share and evaluate all contents on the web. This leads us to introduce a new type of social network that is based on user activity and content metadata. Moreover, we can determine the quality of related contents using this new social network. Based on this observation, we introduce a user evaluation algorithm for user-generated video sharing website such as YouTube.

Thin Film Electrolyte Micro-SOFC: Fabrication and Performance Improvement Through Thin Film Electrolyte and Nano-Structure Electrodes

Thu, 01 Jan 2009 00:00:00 GMT

Title: Thin Film Electrolyte Micro-SOFC: Fabrication and Performance Improvement Through Thin Film Electrolyte and Nano-Structure Electrodes Authors: Noh, Ho-Sung; Lee, Heon; Lee, Jong-Ho; Lee, Hae-Weon; Son, Ji-Won Abstract: Performance improvement, especially in the lower operating temperature regime, by employing thin film and nano-structure electrodes for miniaturized SOFCs is investigated. Anode-supported cells with thin (<= 1 mu m) YSZ electrolytes were fabricated by using pulsed laser deposition (PLD). Performance of the cell was characterized at temperatures lower than 600 degrees C. We obtained OCV > 1 V with less than 1 mu m-thick thin electrolytes, which implied that the thin electrolyte was fairly dense and gas tight. The thin film electrolyte cells exhibited much improved cell performance than that of the anode-supported SOFC cell with a thick (similar to 10 mu m) YSZ electrolyte in the low operating temperature regime (350-550 degrees C). The effects of the nano-structured electrodes and thin film electrolytes on the cell performance are investigated.