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변수모델을 이용한 전달경로분석법(OPAX)과 전달률 함수를 사용한 전달경로분석법(OTPA)을 사용한 승차감 저해요인분석
김종식(Jongsik Kim),신광수(Kwangsoo Sin),최상일(Sangil Choi),임세빈(Sebin Im),김진동(Jindong Kim),이상권(Sangkwon Lee) 한국소음진동공학회 2014 한국소음진동공학회 논문집 Vol.24 No.12
The ride quality investigation is on-going topic in the car industry since its global standard has not evaluated and it is difficult to point out one part that hinders the ride quality. Since the traditional transfer path analysis that is widely used in car industry to investigate the ride quality requires a lot of test time to process the full data so that there are problems to conduct in industry. Based on these disadvantages, new approaches have developed such as OPAX(operational path analysis with eXogeneous inputs) and OTPA(operational transfer path analysis) for last decades. The OTPA only requires the operational data for evaluate the contribution of vibration sources and the OPAX has advantage of using parametric model to estimate the operating load and needs a minimum set of extra tests with excitation. In this paper, for evaluating the hindrance of ride quality two methods are used and the result is compared with another result of a car having higher ride quality.
연구논문 : 응급 간이식을 받은 전격성 A형간염 환자의 임상 양상: 다른 원인에 의한 급성 간부전 환자와의 비교
김진동 ( Jin Dong Kim ),최종영 ( Jong Young Choi ),박정화 ( Chung Hwa Park ),송명준 ( Myeong Jun Song ),장정원 ( Jeong Won Jang ),배시현 ( Si Hyun Bae ),윤승규 ( Seung Kew Yoon ),이영석 ( Young Sok Lee ),유영경 ( Young Kyoung Y 대한간학회 2010 Clinical and Molecular Hepatology(대한간학회지) Vol.16 No.1
목적: 최근 A형간염에 따른 전격성 간부전이 증가하고, 이에 따른 응급 간이식이 많이 시행되고 있다. 이 연구에서 전격성 A형간염으로 간이식을 시행받은 환자의 임상적 특징을 분석하고자 하였다. 대상 및 방법: 2007년 12월부터 2009년 5월까지 본 이식센터에서 기저 간질환 없이 IgM anti-HAV 항체 양성으로 간이식을 시행받은 환자 11명의 임상자료를 같은 분기에 다른 원인의 급성 간부전으로 이식을 받은 환자 10명의 자료와 후향적으로 비교하였다. 결과: A형간염에 의한 간부전군(HAV군)의 연령은 중앙값이 34세(범위: 15~43)였고, 남자가 3명(27.3%)이었다. HAV군에서 다른 원인의간부전군(non-HAV군)보다 헤모글로빈, AST, ALT, 레아티닌 수치가 높았고(각각 P=0.005, 0.001, 0.001, 0.010), 빌리루빈 수치는 낮았다(P=0.003). HAV군에서 임상증상을 처음 자각한 시점부터 간성뇌증의 발현까지의 기간은 중앙값이 5일(범위: 4~13)로 임상 경과가 빠르게 진행했다(P<0.001). HAV 군에서 간성뇌증의 진행은 실험실검사 소견 및 기존 예후예측모델의 점수와 연관성이 낮았고, 기존의 간이식 기준과 부합하는 경우도 적었다. 결론: A형간염에 의한 급성 간부전 환자의 임상 양상은 빠르게 진행하며, 실험실검사 소견이나 기존의 예후예측모델은 A형간염 환자에서 간이식 대상자를 선정하는 기준으로 충분하지 않다. Background/Aims: According to recent prevalence of hepatitis A virus (HAV) infection, acute liver failure ALF) due to HAV infection is observed frequently in parallel. The aim of this study was to elucidate the clinical, laboratory, and pathologic features of patients who have undergone emergency liver transplantation (LT) due to fulminant HAV infection. Methods: Clinical, laboratory, and pathologic data of 11 transplant recipients with anti-HAV IgM-positive ALF between December 2007 and May 2009 were analyzed, and compared with data of 10 recipients who underwent LT for the management of ALF due to other causes. Results: The median age of the patients with HAV-related ALF was 34 years (range: 15-43 years). The levels of hemoglobin, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and creatinine were higher and the level of bilirubin was lower in the HAV-related ALF group than in the other group (P=0.005, 0.001, 0.001, 0.010, and 0.003, respectively). The time from the onset of initial symptoms to the development of encephalopathy was shorter in the HAV-related ALF group than in the other group (median 5 days, range: 4-13 days; P<0.001). In patients with HAV-related ALF, laboratory findings and clinical prognostic parameters including the Acute Liver Failure Study Group prognostic index, King`s College criteria, and model for endstage liver disease (MELD) and Child-Pugh scores were not associated with the grade of hepatic encephalopathy or time of progression to encephalopathy. Conclusions: The results of this study indicate that the clinical condition of patients with HAV-related ALF requiring emergency LT aggravates rapidly. Prognostic parameters are not sufficient for discriminating transplant candidates in patients with fulminant hepatitis A. (Korean J Hepatol 2010;16:19-28)
김진동(Kim, Jin-Dong),강덕훈(Kang, Deok-Hun),송복득(Song, Bok-Deuk),이일우(Lee, Il-Woo),공수근(Kong, Soo-Keun),권순복(Kwon, Soon-Bok),전계록(Jeon, Gye-Rok),신범주(Shin, Bum-Joo),왕수건(Wang, Soo-Geun) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.7
순음청력검사기는 정확한 주파수와 음압을 갖는 순음과 차폐 음을 생성하여 출력할 수 있어야 한다. 이를 위해 일정한 기간마다 보정을 하는 것이 불가피하다. 그러나 수동 보정을 사용하는 일반 순음청력검사기의 음향 보정 은 집중력이 필요할 뿐 아니라 시간이 많이 걸리는 단점이 있다. 반면, PC 기반 순음청력검사기의 경우 소프트웨어를 이용하여 자동으로 보정을 수행하는 것이 가능하다. 본 논문에서는 PC 기반 순음청력검사기의 자동 보정을 지원하기 위해 PC 사운드카드를 이용하여 구현한 음압측정기와 이를 이용한 순음청력검사기의 자동보정모듈을 기술한다. 자동 보정모듈을 이용하여 보정한 PC 기반 순음청력검사기를 국제표준기구가 제공하는 기준등가역치음압수준과의 적합 여부를 검증한다. A pure tone audiometer should be able to produce both pure tone and masking noise with exact sound pressure level and frequency. For such purpose, it is unavoidable to periodically calibrates pure tone audiometer. However, manual acoustic calibration requires not only attention but also long time. It is possible to execute automatically calibration using software if it is PC-based pure tone audiometer. In this paper, we describe auto-calibration software for PC-based pure tone audiometer and dedicated sound level meter which has been implemented upon PC by us. To verify auto-calibration module, we examine whether output of PC-based audiometer calibrated through auto-calibration of this paper satisfies RETSPL of IEC or not.
김진동(Jin Dong Kim),박정선(Jung Sun Park) 한국관광연구학회 2009 관광연구저널 Vol.23 No.4
Recently, Tourist Information Centers(TICs) have played an increasingly important role in various kinds of functions, such as reservation, relaxation, display and sales, region connection(liaison) as well as furnishing tourism information. In spite of increasing internet access, TICs represent a reliable and convenient place for tourists to research various activities including tourism information. The aim of this study was to locate any problems and suggest improvements for higer level of TICs management. By way of observation and interview, on-site surveys of the 21 TICs were conducted in Korea`s main tourist destinations: Seoul, Busan, and Jeju. Authors examine 10 checkpoint categories (employee, guide equipment, guide telephone, working time, reservation and sales, informative and promotional material furnishing such as brochure and pamphlet, safety facilities and supplies, BBB card furnishing, convenience of use etc) in this questionnaire. The results found similarities and differences among the survey regions` acknowledged problems and improvements of TICs management. Furthermore, many problems and suggested improvements that should be considered to develop more sophisticated regional TICs were highlighted by the questionnaire. Implications for related operating bodies were also discussed.
김진동(Jin Dong Kim),손재영(Jae Young Son) 한국관광연구학회 2015 관광연구저널 Vol.29 No.12
This study was conducted to suggest implications for tourism development in Gangneung-si using content analysis of newspaper articles. As one of the most representative tourist destination in Korea for a long time, Gangneung has a lot of attractive tourism resources and is the most visited city in Gangwon province. Furthermore, the 2018 winter olympics is expected to have a positive impact on Gangneung. In spite of that, there have been some problems in view of tourism infrastructure, tourism preparedness etc. Through the content analysis of newspaper articles published from march 1, 2011 until march 31, 2014, authors found various issues and tasks surrounding Gangneung tourism. Analysis categories are theme category, article size, article direction, a classified newspapers. Results are as follows: Themes are classified as 8 categories including local government effort for developing and activating regional tourism, promotional articles, tourism resources development, medical tourism, tourism preparedness etc. Order of article size is medium(500-1000 letters), small(under 500 letters), large(above 1001 letters). Affirmative and neutral articles comprise the great majority indicating 88.2 % of article direction. There are some differences in the rate of theme category as a classified newspapers, Discussing study results, authors suggested several aspects of improvements and implications for the policy makers and the authorities concerned.