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2-4 cell 리튬이온 멀티 배터리 보호회로 Analog Front End(AFE) IC 설계
김선준,김준식,박시홍,Kim, Sun-Jun,Kim, Jun-Sik,Park, Shi-Hong 한국전기전자학회 2011 전기전자학회논문지 Vol.15 No.4
휴대 기기가 고기능화, 다기능화 됨에 따라 다양한 멀티미디어 기능이 요구되면서 배터리를 보다 장시간 이용하면서 더 높은 전력과 에너지가 요구되고 있다. 이에 따라 여러 개의 리튬이온 cell을 연결한 배터리팩이 많이 사용되고 있다. 2개 이상의 cell로 구성된 리튬이온 배터리를 안전하게 사용하기 위해서는 과전압 및 과전류, 고온으로 부터 보호해야 됨은 물론, 수명을 연장하기 위해서 각 cell의 전압을 같게 유지시켜주는 balancing 기능이 반드시 요구된다. 본 논문에서 제안한 IC는 모바일 기기뿐만 아니라 E-bike, 하이브리드 자동차, 전기 자동차 분야에도 적용 가능할 것으로 예상되며, 국내 PMIC 발전에 기여할 것으로 기대된다. In recent years, the performance and functions of portable devices has increased. so it requires more power efficiency and energy density while using the battery for a long time. therefore Battery pack which are made up from several battery cells in series in order to achieve higher operating voltage is being used. when using a Li-ion battery, we need a protection circuit to protect from overcharge, over discharge, high temperature and over current. Also, when using battery pack, we need to Cell voltage balancing circuit that each cell in tune with the balancing. In this paper, the proposed IC is applicable by mobile devices as well as E-bike, hybrid vehicles, electric vehicles, and is expected to contribute to the development of domestic PMIC.
김선준 ( Seon Joon Kim ),김두현 ( Doo Hyun Kim ),황동규 ( Dong Kyu Hwang ),김상렬 ( Sang Ryull Kim ) 충북대학교 산업과학기술연구소 2011 산업과학기술연구 논문집 Vol.25 No.1
This paper is purposed to suggest safety design for electrical wire which can prevent electrical fires considering load characteristics in livestock barns. In order to achieve the goal in this paper, safety diagnosis report of KESCO (Korea Electrical Safety Corporation) is analyzed, and field investigation for livestock barnsin Cheon-an and Asan area is performed. Experiment on thermal characteristics of electrical wires using elecrical wires of VCTFK, HIV, CV with electrical fan was conducted under the condition that simulates the mode of load capacity in each 5 load groups. The results suggested in this paper can be used as fundamental data for the design of electrical equipments and for the prevention of electrical fires in livestock barn.
녹차추출물의 Vibrio parahaemolyticus에 대한 항균활성
김선준(Seon-Jun Kim),황재호(Jae-Ho Hwang),한경호(Kyeong-Ho Han),조정용(Jeong-Yong Cho),마승진(Seung-Jin Ma),김두운(Duwoon Kim),문제학(Jae-Hak Moon),박근형(Keun-Hyung Park),김선재(Seon-Jae Kim) 한국차학회 2010 한국차학회지 Vol.16 No.2
Green tea extract was tested to determine its antimicrobial effects against the pathogenic bacteria Vibrio parahaemolyticus. The antimicrobial effect of green tea extract was evaluated by measuring the change in the concentration level of V. parahaemolyticus genomic DNA, which was obtained after treatment of green tea ethanol extract with neutral and acidic solvent-fractionation. Green tea extract of the neutral fraction showed concentration-dependent killing of V. parahaemolyticus, whereas green tea extract of the acidic fraction significantly inhibited the growth of V. parahaemolyticus at the minimum inhibitory concentration of 1,000~1,500 ppm.
녹차추출물의 넙치 어병세균, Edwardsiella tarda에 대한 항균 효과
김선준(Seon-Jun Kim),채송아(Song-A Chae),김두운(Duwoon Kim),황재호(Jae-Ho Hwang),한경호(Kyeong-Ho Han),오명주(Myung-Ju Oh),조정용(Jeong-Yong Cho),마승진(Seung-Jin Ma),문제학(Jae-Hak Moon),박근형(Keun-Hyong Park),김선재(Seon-Jae Kim) 한국차학회 2009 한국차학회지 Vol.15 No.3
녹차의 EtOH 추출물과 중성획분, 산성획분을 이용하여 넙치 에드워드병의 원인균 E. tarda에 대하여 항균활성을 측정하였다. EtOH 추출물과 중성획분 그리고 산성획분을 액체배지에 첨가하여 E. tarda를 10?CFU/mL 되게 접종하여 35℃에서 24시간 배양하여 추출한 genomic DNA의 감소로 항균성을 측정하였고, 600 nm에서 흡광도를 측정하여 생육억제활성을 측정하였다. E. tarda에 대한 녹차 추출물의 전체적인 항균력의 크기는 EtOH 추출물>중성획분>산성획분이었으며, EtOH 추출물 1500, 2000 ppm에서 E. tarda의 증식을 효과적으로 저해하였으며, 이에 대한 MIC와 MBC는 1000~2000 ppm 범위에서 측정되었다. Green tea extract was tested to determine the antimicrobial effects against Paralichthys olivaceus pathogenic bacteria, Edwardsiella tarda. The antimicrobial effect was evaluated by measuring the change of genomic DNA concentration level of E. tarda, which was obtained after treatment of green tea ethanol extract, EtOAc-soluble neutral and acidic solvent-fractionation, respectively. Green tea extract showed the concentration dependent killing against E. tarda, where the green tea extract significantly inhibited the growth of E. tarda in the minimum inhibitory concentration of 1000~2000 ppm and minimum bactericidal concentration of 1500~2000 ppm.
호텔과 레스토랑 종사원의 혼잡지각이 직무열의 및 고객지향성에 미치는 영향
김선준(Sun-June Kim) 한국복합리조트포럼 2023 관광체육연구 Vol.2 No.2
Purpose: The purpose of this study is to analyze the effect of hotel and restaurant employees' congestion perception on job engagement and customer orientation. Method: Simple regression analysis, multiple regression analysis, and correlation analysis were conducted to analyze the relationship between the validity and reliability of each variable. Results: In this study, it was found that among hotel and restaurant employees' congestion perception, human congestion perception increases job engagement and can increase customer orientation accordingly, but spatial congestion perception decreases employees' job engagement and consequently can have a negative effect on customer orientation. Conclusion: The significance of this study can be found in that it confirmed the effect of crowded service space on hotel and restaurant employees while emphasizing the importance of service space for efficient service provision of employees in service companies. Interdisciplinary Research Implications: This study is targeted at hotels and restaurants located in Seoul among the tourism industry, and it is considered that it can be spread to applied research if interdisciplinary research on congestion perception in the leisure sector is carried out in connection with the aspect of physical education in the future.
SIP UA 기반 착신 전환 및 금지 설계에 대한 연구
김선준(Kim Sun-Joon),송복섭(Song Bok-Sub),김정호(Kim Jeong-Ho) 한국콘텐츠학회 2006 한국콘텐츠학회 종합학술대회 논문집 Vol.4 No.2
본 연구에서는 SIP기반으로 착신 전환 및 금지 기능을 제안하고 설계한다. 인터넷 전화는 음성통화를 기존 전화망이 아닌 인터넷을 통해 이용할 수 있는 새로운 통신기술로 인터넷 전화를 이용하면 거리에 제약 없이 전화서비스를 적은 비용으로 이용할 수 있으며, 확장된 멀티미디어 서비스가 가능하다. 인터넷 전화가 기존 전화망을 대체하기 위해 품질 개선, 과금 문제, 부가서비스 기능 등이 해결되어야 한다. 이에 본 연구에서는 SIP-Working Group에서 제안한 인터넷 전화 접속관리 프로토콜 SIP(Session Initiation Protocol)를 이용하여 부가서비스로 활용 가능한 통화 관련 기능 중 착신전환 기능과 자동 연결 기능, 사생활 관련 기능 중 착신금지 기능과 개별 통화 수신 거부 기능을 SIP UA(User Agent) 기반으로 제안하고 설계 하였다. Internet phone service is a new service technology that provides voice call services through Internet not through the pre-existing PSTN. It enables a cheap voice call service regardless of distance. We may expect that the Internet phone service may substitute for the voice call service through the PSTN, but not in a short period. There are several problems to be solved for this transition, such as, voice call quality, numbering scheme, billing, standardization, and support of several functions. In this paper, we provided and designed a UA (User Agent) that can support functions regarding voice call, such as call forwarding, auto-connection, call rejection and restriction of individual call, using SIP (Session Initiation Protocol) which is proposed by SIP-Working Group as the standard Internet phone service management protocol.