정보통신분야 국가기술자격증 취득과 정보통신공학 전공 학생들의 취업률 증진을 위한 방안

정기석,민경일,조용석,신용달 永同大學校 1997 硏究論叢 Vol.3 No.1

본 연구에서는 정보통신분야 국가기술 자격증 취득과 정보통신전공학생들의 취업률증진을 위한 방안을 제시하고 그 결과를 고찰하였다. 국가기술자격증 취득방안으로는 동기부여, 특강별로 한 과목씩 단계적인 강의 등의 방법을 제시하였고, 취업률 증진 방안으로는 학생수준에 맞는 업체선정지고, 취업자료 수집, 업체방문 등의 방법을 제시하였다. 연구결과는 업체의 요구조건은 공통적으로 어학증명서와 기술자격증으로서 대기업에 취업하기 위해서는 어학실력이 좋아야 하며 따라서 TOEIC등의 시험을 적극 권장할 필요가 있음을 보여준다. This paper examines a plan for acquiring a technical qualification and promoting the percentage of employment in Information & Communication Engineering Major. As a plan for acquiring a technical qualification, study methods of a motive allowance, step lesson of a curriculum etc. are presented. Also, as a plan for promoting the percentage of employment, study methods of a collection of employment data, company visit etc. are presented. Results of study show that companys require a technical qualification and a certificate of foreign language, so TOEIC should be recommended.

HSS STI-CMP적용을 위한이중 패드의 최적화

서용진,박성우,김철복,정소용,이경진,김기욱,박창준 대불대학교 2002 大佛大學校大學院 硏究論文集 Vol.- No.1

As the device geometry shrinks to the deep submicron region, chemical mechanical polishing(CMP) planarization become a more essential technique of advanced ULSI process. Also, CMP process was required for the global planarization of inter-metal dielectric(IMD), inter-level dielectric(ILD) layers and interconnections with free-defect. Especially, the complete global planarization of IMD, ILD and interconnections can be achieved only with the CMP process. However, as the IMD and ILD layer gets thinner, several problems were found in the CMP process. It does have various problems such as dishing effect, torn oxide defects and nitride residues in oxide. So, it leads to severe circuit failure, which affects yield. In this paper, we studied the characteristics of polishing pad, which can apply STI-CMP process for global planarization of multilevel interconnection structure. Also, we investigated the effects of different sets of polishing pad, such as soft and hard pad. As an experimental result, hard pad showed center-fast type, and soft pad showed edge-fast type. Totally, the defect level has shown little difference, however, the counts of scratch was defected less than 2 on JR111 pad. Through the above result, we can select optimum polishing pad, so we can expect the improvement of throughput and device yield.

자살 시도의 심각도와 혈청 지질농도의 관련성

이헌정,최낙경,김린,이민수,김용구 대한신경정신의학회 2000 신경정신의학 Vol.39 No.6

연구목적 : 낮은 혈청 콜레스트롤 농도와 자살과 같은 폭력적 행동에 관한 관련성에 관한 논란이 있어왔다. 본 연구는 자살 시도 후 응급실로 내원한 환자에서 혈청 총 콜레스테롤 농도만이 아닌 전반적인 혈청 지질 농도의 저하 여부를 조사하였으며, 자살 시도 상황을 평가하는 객관적 척도를 통하여 자살 시도 상황에서 자살 시도의 심각도와 혈청 지질 농도의 관계에 대하여 연구하였다. 방 법 : 1998년 7월부터 1999년 6월 사이에 자살 시도후 고려대학교 의료원 응급실로 내원한 50명의 자살 시도자를 연구대상으로 하였다. 이들은 정신과 의사의 면담을 통하여 정신과적 진단을 받았으며 동시에 위험-구조척도(RRR). HDRS, BPRS 등이 평가되었다. 또한 동 기간에 본원 정신과에서 입원 치료를 받은 자살 시도가 없었던 환자중, 대상군과 나이, 성별, 진단을 맞추어서 50명의 환자를 선정하여 정신과 환자 대조군으로 하였다. 자살 시도군과 대조군의 혈청 지질농도가 t-test를 통하여 비교되었으며, RRR점수와 혈청 지질 농도, HDRS,BPRS와의 사이의 연관성 Spearman순위 상관계수로 분석되었다. 결 과 : 자살 시도자중 주요우울증이 29명, 정신분열병이 2명, 인격장애가 19명이었으며, 자살 시도군의 혈청 총 콜레스트롤 농도(t=---3.29, p=.001). 총 지질 농도(t=-2.62, p=.01), LDL농도(t=-2.64, p=.011)가 대조군보다 유의하게 낮았다. 진단별로는 주요우울증에서는 총 콜레스트롤 농도, 총 지질 농도, LDL 농도가 대조군에 비하여 낮았으나, 인격장애에서는 혈청 콜레스트롤 농돤이 대조군보다 낮았다. 자살 시도군에서 RRR 점수는 혈청 콜레스테롤 농도와 부적 상관관계를 보였으나 (γ=.-293,p=.039), BPRS(γ=.544, p<.001)와 HDRS(γ=.488, p=.001)와는 정적 상관관계를 보였다. 결 론 : 자살 시도군에서 혈청 지질 농도 중 총 콜레스테롤, 총 지질, LDL농도가 유의하게 저하되어있음을 확인하였다. 또한 자살의 심각도를 평가한 RRR 정수가 혈청 총 콜레스테롤 농도와 유의하게 상관성이 있음이 확인되었다. 이는 낮은 혈청 총 콜레스테롤 농도가 심각한 자살 시도와 연관이 있음을 보여주는 것이다. Objectives : Many studies have demonstrated that suicide is related to low serum cholesterol level, whereas conflicting results have also reported. The aims of the present study are to determine whether suicidal attempters have low lipid concentration and to identify the relationship between suicidal attempt severity and serum lipid levels. Methods: Subjects were 50 suicidal attempters who visited the emergency room in Korea University Medical Center between July 1998 and June 1999. All subjects had been interviewed by psychiatrist and evaluated with Risk-rescue rating, HDRS and BPRS. They were diagnosed as major depressive disorder(n=29), personality disorder(n=19), and schizophrenia(n-=2). Serum lipid levels in 50 suicidal attempters were compared with those in 50 nonsuicidal psychiatric inpatients corresponding to the age, sex and diagnosis of the suicidal attempters. We also examined the Spearman's rank correlations between serum lipid levels and risk-rescue score. Results : The serum total cholesterol level(t=-3.29, p=.001), total lipid level(t=-2.62, p=.01), and LDL level(t=-2.64, p=.011) in suicidal attempters were significantly lower compared with nonsuicidal controls. In major depressive patients, total cholesterol level, total lipid level, and LDL level in suicidal attempters were significantly lower than those of nonsuicidal controls. In personality disorder patients, however, only serum total cholesterol level was significantly lower. Risk-rescue rating score was negatively correlated with serum total cholesterol level(p=.-293, p=.039), and positively correlated with BPRS(p=.544, p<.001), and HDRS(p=.488, p=.001). Conclusion : The lipid levels in suicidal attempter were significantly lower. Suicidal attempt severity was also significantly correlated with serum total cholesterol level. These findings suggest that low serum cholesterol should be related with severs violent suicidal attempt.

CMP 공정의 재현성 확보를 위한 공정제어 범위의 결정

서용진,정소영,김철복,박성우,이경진,김기욱,박창준 대불대학교 2002 大佛大學校大學院 硏究論文集 Vol.- No.1

To achieve the ULSI goals of higher density and greater performance, STI(shallow trench isolation)-CMP(chemical mechanical polishing) process has been attracted. Recently, the direct STI-CMP process without the conventional complex reverse moat etch process has established by using slurry additive with the high selectivity between SiO2 and Si3N4 films for the purpose of process simplification and in-situ EPD(end point detection). However, STI-CMP process has various defects such as nitride residue, torn oxide and demage of silicon active region. Also, it was difficult to assure the suitable process margin in the STI-CMP process. To solve these problems, in this paper, we discussed to determine the control limit of process, which can entirely remove the oxide on nitride film from the most area of high density as reducing the damage of dense moat area and minimizing dishing effect in the large field area. We, also, evaluated the wafer-to-wafer thickness variation and the day-by-day reproducibility of STI-CMP process after repeatable tests.

구조적 손상을 입은 철근콘크리트 보의 보강 효과에 관한 연구

김정섭,신용석,김경옥 朝鮮大學校 建設技術硏究所 2006 建設技術硏究 Vol.26 No.1

This study conducted bending experiment to examine reinforcing effects after preloading of reinforced concrete by reinforcing materials and obtained the following conclusions. To sum up experimental results, it was found that CFS reinforced specimens were excellent in improving bending force and ductility capacity and CB reinforced specimen showed higher reinforcing effects. GFS reinforced specimen had lower reinforcing effects due to lower attachment than fiber reinforced material CFS. GSP reinforced specimen had larger internal force than other reinforced specimens, but it showed the lowest reinforce effects due to its low attachment to concrete and GSP reinforcing specimen showed the same or higher reinforcing effects than other reinforcing materials if its attachment to concrete is improved.

알코올성 케톤산증 환자에서 보이는 대뇌 기저핵 손상 : Case Report

권용실,이해국,박정욱,이정태,이경욱 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.2

흉요추부 굴곡-신연 손상에서의 후추 손상의 분포 및 양상

김용민,김동수,최의성,손현철,박경진,정경일 대한척추외과학회 2004 대한척추외과학회지 Vol.11 No.2

양측성 관상동정맥루 1예

최용원,오석규,이재훈,이상재,권경희,최은경,김남호,정진원 圓光大學校 醫科學硏究所 2002 圓光醫科學 Vol.17 No.1

저자들은 호흡곤란, 흉부불쾌감, 심계항진 등을 주소로 내원한 환자에서 경흉부 및 경식도 심초음파 검사상 주폐동맥에서 이완기에 전행하는 지속적인 혈류의 흐름을 관찰하고, 관상동맥 조영술을 통해 좌전하행지 중간부위와 우관상동맥 근위부에서 각각 기시하여 공통경로를 이루면서 주폐동맥으로 유입되는 양측성 관상동정맥루를 보이는 드문 1예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. A coronary arteriovenous fistula is infrequently encountered vascular communication between a coronary artery and a cardiac chamber, a great artery or the vena cava. It is the most common congenital anomaly that can affect coronary perfusion. Bilateral involvement of coronary fistula constitutes an uncommon subgroup of coronary arteriovenous fistulas. A 69 year-old female patient presented with chest discomfort, palpitation, and dyspnea. In the echocardiography, doppler color flow imaging visualized abnormal flow signals with mosaic appearance in the main pulmonary artery during diastolic phase. Coronary angiography revealed arteriovenous fistula arising from the left anterior descending artery and the right coronary artery. Both coronary arteriovenous fistulas drained into the main pulmonary artery. We report a case of bilateral coronary arteriovenous fistula that was confirmed by echocariography and coronary angiography.

세균성 뇌막염과 병발된 다엽성이면서 다발성인 화농성 뇌농양 1예

최용석,김정미,한영수,차경만,한정호,조은경,김두응 최신의학사 2004 最新醫學 Vol.47 No.1

노인에서 정서 인식의 저하

이경욱,채정호,최인철,이해국,권용실,이정태 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.2

Objectives : The purpose of this study was to investigate whether elderly and young adults differ in their recognition of facial expressions of emotion. Methods : A total of 120 (elderly group 53, young group 67) subjects participated in this study. Korean facial expressions of emotion including happiness, sadness, fear, anger, disgust, surprise and neutral were used as stimuli for facial affect recognition test. Computerized facial affect recognition test that consists of facial affect discrimination test and facial affect intensity test was performed. Results : For facial affect discrimination test, there was a significant difference between two groups (F==3.986, P<.01) after controlling the effect of education. Elderly participants showed significantly less correct recognition rate with sadness, anger and disgust (p<.05). For facial affect intensity test, there was no significant difference between the groups in recognition of emotional intensity. Chi-square test or t-test was done according to the clinical variables. Multivariate analysis of covahance was done to test group differences of correct recognition rate and emotional intensity. Conclusion : This is the first report of differential decrease of facial affect recognition in elderly using Korean facial expressions. This study suggests that the decrement of facial affect recognition maye be a part of normal aging process.