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김동원(Dong-Won Kim),조규일(Kyu-Il Cho),김현근(Hyun-Keun Kim),강자연(Ja-Youn Kang),이원혁(Won-Hyuk Rhee),황금철(Keum-Cheol Hwang) 한국표면공학회 2008 한국표면공학회지 Vol.41 No.5
The porous metal material is used for injection metal mold with a great deal of gas production because it makes plenty of gas exhausted through pores formed in the metal mold. A canning HIP method was conventionally used for manufacturing of porous metals, but because of difficulty of process control and high cost of production its application was limited. In this experiment, porous metal mold material was produced by an enhanced vacuum sintering method with simply controlled and economical process and porosities/mechanical properties with variation of sintering temperature and duration time during vacuum sintering were studied. As a result, quality goods were obtained at optimized conditions as follows: sintering temperature of 1230℃, duration time of 2 hr and showed superior properties in wear loss and thermal conductivity and the same properties in hardness, TRS (Transverse Rupture Strength), and thermal expansion coefficient in comparison with those under canning HIP.
최규영 ( Kyu Young Choi ),안석진 ( Seok Jin Ahn ),김현근 ( Hyun Keun Kim ),이세한 ( Se Han Lee ),유창민 ( Chang Min Yu ),조재현 ( Jae Hyun Cho ),유지원 ( Ji Won Yoo ),서승오 ( Seong O Suh ),김은실 ( Eun Sil Kim ),정준오 ( Jun Oh J 대한내과학회 2010 대한내과학회지 Vol.78 No.2
Background/Aims: The most common type of syncope in young adults is neurocardiogenic in origin, which is not related to organic problems and has a benign nature. Therefore, there have been few reports regarding syncope in young Korean adults. Here, we examined the causes of syncope and its clinical characteristics in young combat and auxiliary police in Korea. Methods: We performed a retrospective study of the medical records of 193 combat and auxiliary police in Korea admitted to the National Police Hospital for syncope or presyncope between January 2004 and December 2007. Results: The subjects` mean age was 21±1.2 years, and there were 2.8±2.9 episodes of syncope (mean±SEM). The first syncope occurred after enlistment in the police in 102 patients (52.8%). Basic diagnostic studies showed two cases of elevated creatine phosphokinase and one case of anemia to be related to syncope. Syncope-related traumatic injuries occurred in 38 patients (19.7%), and syncope was more prevalent in the summer. Head-up tilt test was performed in 175 of the 193 patients, and 123 showed a positive response. Other evaluations, including brain magnetic resonance imaging, electroencephalography, and echocardiography, were not helpful for diagnosis. Syncope was neurocardiogenic in origin in the majority of cases. Other causes of syncope were exhaustion (n=2), hyperventilation syndrome (n=2), Meniere`s disease (n=1), anemia (n=1), and psychiatric problems (n=5). The causes of syncope could not be identified in 59 patients (30.5%). Conclusions: Neurocardiogenic syncope was the most common type in our study population. More than half of our patients experienced their first episode after enlisting with the police. Further studies in these groups are necessary. (Korean J Med 78:198-206, 2010)
김현근,최순욱,안주영,박상준,김윤권,김소연,조재현 대한감염학회 2009 감염과 화학요법 Vol.41 No.6
Extrapulmonary tuberculosis, such as intestinal tuberculosis, has become more common with the increase in human immunodeficiency virus infection. However, the diagnosis and treatment of intestinal tuberculosis are often delayed because the symptoms are nonspecific and diverse. We experienced a case of AIDS with intestinal tuberculosis that manifested as a duodenal fistula. The presence of AIDS should be suspected in patients who have extrapulmonary tuberculosis with atypical presentations.
문창기,박상준,조민구,김영중,김소연,김윤권,정준오,안석진,김은실,서승오,김지훈,최원제,이윤영,박형기,최규영,김현근 대한감염학회 2006 감염과 화학요법 Vol.38 No.6
Background: The purpose of this study was to document the incidence and clinical characteristics of patients with tuberculosis (TB) in combat and auxiliary police, living in a group, in Korea where the incidence rate of active TB in a general population is higher than in Western countries. Materials and Methods:We retrospectively reviewed the medical records of all tuberculosis patients diagnosed at National Police Hospital from January 2002 through December 2004. Results:In 2002-2004, a total of 156 cases of tuberculosis were identified with the mean (Standard deviation) age of 20.6 (±1.0) years. Of these, 134 (85.9%) patients were registered as new cases, 11 (7.1%) as relapse, 2 (1.3%) as failure, 5 (3.1%) as treatment-after-default cases whereas 4 (2.6 %) patients were not included in any categories. Average annual new TB rate and smear-positive TB rate were 86.5/10^(5) and 17.4/10^(5) person-years, respectively. In 12 of 31 smear-positive cases, time from onset of symptoms to diagnosis was more than 30 days. Two multidrug-resistance TB cases were identified and two suspected outbreak episodes of TB had occurred during 3 years. Conclusion:There was no statistically significant difference in the incidence rate of new cases of TB between the general population aged 20 to 29 years and combat and auxiliary police in Korea. 배경 : 국내 결핵의 발생은 감소 추세에 있으나 여전히 후진국형 발생양상을 보이고 있다. 특히 집단생활을 하는 젊은이들에서 발생하는 결핵의 유행이 간헐적으로 알려지고 있어 우려를 낳고 있다. 이에 저자들은 최근 전경대원의 결핵 발병 양상에 대해 알아보고자 본 연구를 시행하였다. 재료 및 방법 : 2002년 1월부터 2004년 12월까지 3년간 경찰병원에서 결핵 진료를 받은 전경대원의 의무기록을 후향적으로 분석하여 연도별 결핵 신환발생률, 도말양성결핵 신환율, 진단 지연, 집단발병, 다제내성결핵을 조사하였다. 결과 : 연도별 결핵 신환자 수(10만명당 발생추정치)는 2002년 50명(83.6명), 2003년 42명(83.7명), 2004년 42명(93.5명)이었고 도말양성 폐결핵 신환자 수는 2002년 10명(16.7명), 2003년 11명(21.9명), 2004년 6명(13.4명)이었다. 3년간 도말양성 폐결핵 환자는 31명이 있었고 그 중 12명은 호흡기 증상 발생 30일이 지나서 진단을 받았다. 다제내성 결핵은 2명이 있었으며 결핵의 집단발병이 의심되는 사례는 2차례 있었다. 결론 : 전경대원과 20-29세 연령군 일반인의 결핵 신환발생률, 도말양성 폐결핵 발생률의 통계적으로 유의한 차이는 없었다.
서비스만족과 재구매의도사이의 영향요인에 관한 실증연구 : 패밀리 레스토랑을 중심으로 Focus on Family Restaurant
차수련,김현근 동국대학교 경영대학원 1999 經營論叢-東國大學校 經營大學院 Vol.23 No.-
The importance of maintaining and managing the existing customers becomes greater as product life cycle has its mature period and customer loyalty is decreasing with their desires. The purpose of this study is to examine the factors which influent the relationship between service satisfaction and repurchase intention. Previous research has mostly focused on understanding the factors which influence the service quality evaluation and how these service quality/satisfaction affect both repurchase intention and word of mouth. Many research about the repurchase intention after the satisfcation have supported the theoretical paradigm that service quality/satisfaction has a positive impact on the repurchase intention after satisfaction. The results of many studies on service satisfaction show that the higher service satisfaction is, the higher repurchase intention becomes. But in the service industry, there has been many cases against the paradigm mentioned above. therefore, adding the individual propensity to search for the variety and the alternative attractiveness as the moderating variables to the previous research paradigm, this study examines what effects the two variables have on the formulation of repurchase intention. For an hypothesis inspection. I did a survey with the subject of family restaurant customers. The questionaire was designed on reference of previous literature. The questionaire were presented to adult consumer who are selected on random sampling method. Within the 150 distributed questionaire, and 119 were analyzed. To examine difference among groups, mainly T-test and Anova were used as analysis tools. The study obtained the following empirical results. It turned out that the propensity to search for the variety did not has meaningful influence on relationship between satisfaction and repurchase intention. This result is due to the interpurchase frequency. The majority of sampling(62.2%), whose interpurchase frequency was one time a month. That is to say, under the long interpurchase frequency, the propensity to search for the variety is not so influential in repurchase intention. Alternative attractiveness affects repurchase intention and that degree is influenced by the relative service involvement. therefore, consumers can switch to other service even after the satisfaction. This study offers two implications: Firsy, this study deals the post-satisfaction stage that the previous reserch has overlooked. Second, this study provides two new variables - the propensity to search for variety and alternative attractiveness - that theorecal paradigm about the relationship between service satisfaction and repurchase intention.