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현준호,최두진,Hyun, Joon-Ho,Choi, Doo-Jin 한국디지털정책학회 2003 디지털융복합연구 Vol.1 No.1
The purpose of this paper is to analyze the trends of policies and law related to web accessibility in developed countries such as U.S, U.K, Australia, Japan and EU and then propose polices to improve web accessibility in Korea. The results of the paper are as follows : First, the awareness promotion programs, i.e seminars, campaigns, contests, etc., should be provided. Second, Korean standards and guidelines which have specific information should be made to improve web accessibility, Third, Web accessibility specialist should be trained. Finally, Law and regulation related to web accessibility should be amended as the Section 508.
단보 : 초음파용매추출에 의한 Allyl Isothiocyanate의 분광광도법 정량
현준호 ( Joon Ho Hyun ),최종문 ( Jong Moon Choi ) 한국환경분석학회 2012 환경분석과 독성보건 Vol.15 No.3
Allyl isothiocyanate as an irritant quantified by spectrophotometry after ultrasonic solvent extraction as a preconcentration were studied. For this purpose, the experimental conditions of allyl isothiocyanate need to be reviewed, comparing the extracting organic solvents solubility and extraction efficiency, the change of the maximum absorption wavelength according to extracting organic solvents and ultrasonic solvent extraction time were optimized. Results obtained using the standard sample, optimum extraction organic solvent was dichloromethane, and obtained significant absorbance spectrum by this ultraviolet light/sight lines without interfering which make applying by this method. For ultrasonic solvent extraction time of allyl isothiocyanate was sufficient in 15 minutes. Based on the experimental conditions of reviews, the calibration curve using a series of concentrations of the standard solution was made for quantitative analysis. Finally, determination of Allyl Isothiocyanate and reliable level of results could be obtained by applying this method in the domestic two-party products.
현준호(Hyun Jun-Ho),김영민(Kim Yeong-Min),정진호(Jung Jin-Ho),이윤준(Lee Yoon-Joon),천원기(Chun Won-Gee) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.4
According to the environment report of UN, korea was classified as potable water shortage countries. Approximately 71% of the Earth's surface is covered by ocean. However, it is difficult to use for industry of residential purpose without a certain processing. The development of solar and waste-heat used absorption desalination technology have been examined as a viable option for supplying clean energy. In this study, the modelling of the main devices for solar and waste-heat used and adsorption desalination system was introduced. The design is divided into three parts. First, the evaporator for the vaporization of the top water is designed, and then the reactor for the adsorption and release of the steam is designed, followed by the condenser for the condensation of the fresh water is designed. In addition, new features based on the energy balance are also included to design absorption desalination system. In this basicresearch, One-bed(reactor) adsorption desalination plant that employ a low-temperature solar and waste energy was proposed and experimentally studied. The specific water yield is measured experimentally with respect to the time controlling parameters such as heat source temperatures, coolant temperatures, system switching and half-cycle operational times.
태양열 및 폐열을 이용한 흡착식 담수화 시스템의 기초연구
현준호(Hyun Jun-Ho),김영민(Kim Yeong-Min),이윤준(Lee Yoon-Joon),천원기(Chun Won-Gee) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
According to the recent UN environmental report, Korea was classified as one of the countries with the shortage in potable water supply. Approximately 71% of the Earth's surface is covered by ocean. It is, however, difficult to harness natural water directly for industry or residential purposes without any purification or treatment processes. As a viable option in utilizing clean energy, this study has examined the development of absorption desalination technology in link with exploiting solar thermal energy and waste-heat. Major components of a adsorption desalination system was designed and analyzed, which was further developed to build a one-bed(reactor) adsorption desalination plant employing low-temperature solar energy and waste heat. A series of measurements were made to assess its performance and elicit the most feasible and efficient model. Especially, the amount of fresh water yield was cautiously monitored with respect to the time controlling parameters such as heat source temperatures, coolant temperatures, system switching and half-cycle operation times.
현준호(Hyun Jun-Ho),Farrukh israr,이윤준(Lee Yoon-Joon),천원기(Chun Won-Gee) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.3
The development of solar thermal energy used adsorption desalination technology have been examined as a viable option for supplying clean energy. In this study, the modelling of the main devices for solar thermal energy used and adsorption desalination system was introduced. Silica gel type adsorption desalination system is considered to be a promising low-temperature heat utilization system. The design is divided into three parts. First, the evaporator for the vaporization of the tap water is designed, and then the reactor for the adsorption and release of the steam is designed, followed by the condenser for the condensation of the fresh water is designed. In addition, new features based on the energy balance are also included to design absorption desalination system. In this basic research, One-bed(reactor) adsorption desalination plant that employ a low-temperature solar thermal energy was proposed and experimentally studied. The specific water yield is measured experimentally with respect to the time controlling parameters such as heat source temperatures, coolant temperatures, system switching and half-cycle operational times. Desalination is processes that permeate our daily lives, but It requires substantial energy input, powered either from electricity or from thermal input. From the environmental and sustainability perspecives, innovative thermodynamic cycles are needed to produce the above-mentioned useful effects at a lower specific energy input. This article describes the development of adsorption cycles for the production of desalting effects. We want that this adsorption system can be driven by low temperature heat sources at 60 to 80℃, such as renewable, solar thermal energy.
저온 활용을 위한 실리카겔 흡착식 담수화시스템의 성능연구
현준호(Hyun, Jun-Ho),Farrukh israr,이윤준(Lee, Yoon-Joon),천원기(Chun, Won-Gee) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.6
This work introduces a simple one-reactor adsorption desalination system that harnesses low temperature heat sources (solar energy, waste heat), which has been experimentally studied to elicit the most suitable design parameters and operating conditions. The design process of the system was divided into three parts to reflect the operating principle of desalination technology with application of adsorption processes. First, the evaporator for the vaporization of saline water was designed, then the reactor for the adsorption and release of the steam, followed by the condenser for condensation of the fresh water. The specific water yield is measured experimentally with respect to the time while controlling parameters such as heat source temperatures, coolant temperatures, system switching and half-cycle operational times. The present system well demonstrates the applicability of silica gel in relation to adsorption technologies that utilize low temperature heat sources ranging from 60 to 80℃, such as solar energy and waste heat.
비유리식(nonglass) 진공관의 진공도가 집열판의 열적 특성에 미치는 영향
오승진(Oh Seung-Jin),현준호(Hyun Jun-Ho),김남진(Kim Nam-Jin),이윤준(Lee Yoon-Joon),천원기(Chun Won-Gee) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.3
This study has been carried out to investigate the effect of vacuum on the thermal performance of a nonglass evacuated tube. A series of measurements are made indoors to monitor the temperature change of the absorber plate contained in the evacuated tube under different conditions of vacuum and heat fluxes. Those temperatures measured at the thermal equilibrium could be used to assess the heat losses to the ambient in link with the steady operation of non-glass evacuated tubes for solar exploitation.
소형 태양 반사경 Cluster를 이용한 태양열 발전에 대한 타당성 연구
오승진(Oh, Seung-Jin),현준호(Hyun, Joon-Ho),천원기(Chun, Won-Gee) 한국신재생에너지학회 2006 신재생에너지 Vol.2 No.4
This paper introduces a preliminary work for the design of a mini-dish cluster system for power generation. Each mini-dish [typically has a 20 to 30 cm in diameter] is designed with a simple parabolic profile concentrating sun light [after the glass glazing cover to avoid dust deposition on the reflector and facilitate cleaning] onto a centrally located small plane[or concave] mirror which is placed on the bottom side of a transparent glass cover. The mirror with a mini-dish concentrator is designed to focus beam radiation onto a focal point before it enters a bundle of optical fibers connected to a remote receiver for power generation. Different options are considered in designing a mini-dish concentrator to maximize its effectiveness for the collection and use of solar energy.