Hae-Jong Joo

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To catch up with the recent expansions of wireless platforms, the performance of quality management systems for wireless communication network services needs to be continuously improved; therefore, studies should be conducted on comprehensive quality indicators through the quality analyses that can represent the users’ quality of experience (QoE) of(More)
The barcode system currently used in the market has a weakness in that identification is only made when the barcode is visible. Unlike the barcode system, the RFID system uses radio frequency technology, allowing more accurate and faster identification of objects than the barcode system. RFID is a method to identify object data using radio frequency(More)
In this paper, based on core technologies such as overcoming a place’s limitations, light that can substitute for the sunlight, automation, nutrient supply system and temperature, and intelligent situation recognition for solar power generation, geothermal HVAC (heating, ventilating, and air conditioning), a plant growth analysis system for vegetation(More)
This paper finally aims to make the public confident, fair and objective Taekwondo evaluation environment through development of publically certified remote Taekwondo Dan(Poom) promotion evaluation platform and, further vitalize Taekwondo and arrange the base for popularization and distribution of remote Taekwondo Poomsae promotion evaluation system. For(More)
For the subjective measurement of video quality, various standard methods are suggested, but these are based on short-time video watching (around 10 s) under the condition that the original standard video exists. In the digital broadcasting (IPTV, DCATV, satellite broadcasting) watching conditions, however, people watch videos for a long time, rendering the(More)
In this paper, a Mobile Continuous Query Processing System (MCQPS) is designed to solve problems related to database hoarding, maintenance of shared data consistency, and optimization of logging. These problems are caused by weak connectivity and disconnection of wireless networks inherent in mobile database systems under mobile client-server environments.(More)
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