Photoreflectance 측정에 의한 InxGa₁-xAs(0.03≤X≤0.11) 에피층의 특성 연구

김인수(In-Soo Kim),손정식(Jeoog-Sik Son),이철욱(Cheul-Wook Lee),배인호(In-Ho Bae),임재영(Jae-Youog Leem),한병국(Byung-Kuk Han),신영남(Young-Nam Shin) 한국진공학회(ASCT) 1998 Applied Science and Convergence Technology Vol.7 No.4

Molecular Beam Epitaxy(MBE)법으로 성장된 In_xGa_(1-x)As/GaAs 에피층에 대해 photoreflectance (PR)실험을 통해 특성을 조사하였다. PR 측정결과 성장된 In_xGa_(1-x)As 에피층의 띠간격 에너지(E。) 신호가 시료의 변형(strain)에 의해 heavy-hole(E。(HH))과 light-hole(E。(LH))로 분리되어 관측되었다. 에피층의 조성과 변형은 각각 시료에서의 E。(HH) 및 Eo(HH)와 Eo(LH)신호의 에너지 차이를 이용하여 구하였다. 또 160 K이하의 온도에서는 Eo(LH)의 신호가 사라짐을 볼 수 있었다. Franz-Keldysh oscillation(FKO) 피크로부터 계산되어진 InGaAs/GaAs 계면전장 (E)은 In 조성의 증가에 따라 0.75×10^5 V/㎝에서 2.66×10^5 V/㎝로 증가하였다. In 조성이 x=0.09인 시료에 대한 PR신호의 온도의존성 실험에서 Varshni 계수와 Bose-Einstein 계수들을 각각 구하였다. Photoreflectance (PR) measurents have been performed on In_xGa_(1-x)As/GaAs grown by molecular beam epitaxy (MBE). Bandgap (E。) of In_xGa_(1-x)As epilayer measured from PR was separated as heavy-hole (E。(HH)) and light-hole (E。(LH)) by strain effect. The compositions and the strains of epilayer were obtained from the energy value of E。(HH) and from enegy difference of E。(HH) and E。(LH), respectively. In addition, the PR signal of E。(LH) was diminished below 160 K. The interface electric field (E) of InGaAs/GaAs was increased from 0.75×10^5 V/㎝ to 2.66×10^5 V/㎝ as In composition increased, which was calculated from Franz-Keldysh oscillation (FKO) peaks. As the temperature dependence of the PR signal at x=0.09 sample, we obtained Varshni and Bose-Einstein coefficients.

Wolff-Parkinson-White증후군의 임상상 및 전기생리학적 소견

안신기,이문형,장양수,오동진,최인석,하종원,임세중,김병옥,정남식,심원흠,조승연,김성순 대한순환기학회 1997 Korean Circulation Journal Vol.27 No.9

한의진단명과 진단요건의 표준화 연구 III : 3차년도 연구결과 보고

최선미,양기상,최승훈,박경모,박종현,심범상,김성우,노석선,이인선,정진홍,이진용,김달래,임형호,김윤범,박성식,송태원,김종우,이승기,최윤정,신순식 한국한의학연구원 1997 한국한의학연구원논문집 Vol.3 No.1

The diagnostic requirements were suggested and explained regarding the systems of differentiation of symptoms and signs in the third year study of standardization and unification of the terms and conditions used for diagnosis in oriental medicine. The systems were as follows : - analyzing and differentiating of epidemic febrile disease - analyzing and differentiating in accordance with the Sasang constitution medicine based on four-type recognition - differentiation of disease according to pathological changes of Chong and Ren channels - standards for diagnosis of women's disease - standards for diagnosis of children's disease - standards for diagnosis of motor and sensor disturbance (-muscle. born, joint, etc.) - standards for diagnosis of neuropsychiatric disease - standards for diagnosis of five sense organ disease - standards for diagnosis of external disease The indivisual diagnosis pattern was arranged by the diagnostic requirements in the following order : another name, notion of diagnosis pattern, index of differentiation of symptoms and signs, the main point of diagnosis, analysis of diagnosis pattern, discrimination of diagnosis pattern, prognosis, a way of curing a disease, prescription, herbs in common use, disease appearing the diagnosis pattern, documents. The standards for diagnosis of each disease was arranged by the diagnostic requirements in the following order : another name, notion of disease, the main point of diagnosis, analyzing and differentiating of disease, analysis of disease, discrimination of disease, prognosis, a way of curing and prescription of disease, disease in western medicine appearing the disease in oriental medicine, documents.

The Effect of Rosiglitazone on the Cell Proliferation and the Expressions of p27 and Skp2 in<i>Helicobacter pylori</i>Infected Human Gastric Epithelial Cells

Kim, Sung-Soo,Cho, Young-Seok,Kim, Hyung-Keun,Shin, Ok-Ran,Chae, Hiun-Suk,Choi, Myung-Gyu,Chung, In-Sik The Korean Society of Gastroenterology 2010 대한소화기학회지 Vol.55 No.4

<P>Background/Aims: Ligands for peroxisome proliferator-activated receptorgamma (PPARgamma), a member of the ligand-activated nuclear receptor superfamily, exhibit anti-tumoral effects and are associated with de novo synthesis of proteins involved in regulating the cell cycle and cell survival/death. Helicobacter pylori (H. pylori) is an etiologic agent for gastric adenocarcinoma, and raises the cell turnover of gastric epithelium. The aim of this study was to investigate the effect of PPARgamma ligand rosiglitazone on the cell proliferation and the expressions of p27 and Skp2 protein in H. pylori infected gastric epithelial cells. Methods: We examined the expression of PPARgamma by Western blot in H. pylori infected AGS human gastric epithelial cells. The effect of rosiglitazone on the survival of H. pylori infected AGS cells was assessed by cell viability assay. After the treatment of rosiglitazone in H. pylori infected AGS cells, the expressions of p27 and Skp2 were assessed by Western blot. Results: The expression of PPARgamma protein was increased in H. pylori infected AGS cells. Cell growth was inhibited and decreased in dose- and time- dependent manner in H. pylori infected AGS cells treated with rosiglitazone. A decrease in Skp2 expression and a reciprocal increase in p27 expression were found in dose- and time-dependent manner in H. pylori infected AGS cells treated with rosiglitazone. Conclusions: Rosiglitazone inhibited the growth of H. pylori infected AGS cells. Rosiglitazone attenuated Skp2 expression, thereby promoting p27 accumulation in H. pylori infected human gastric epithelial cells. Further studies will be needed to find the effects of accumulation on cell turnover in H. pylori infection and the role in the H. pylori-associated gastric carcinogenesis.</P>

치은섬유아세포의 MMP 발현에 대한 Nitric Oxide의 영향

신인식,윤상오,정현주 전남대학교 치의학연구소 2003 구강과학 Vol.15 No.1

Periodontitis are infectious diseases characterized by periodontal attachment loss and bone destruction. Various collagens, the predominant extracellular matrix (ECM) components of periodontium which produced by periodontal ligament and gingival fibroblasts, are the main targets of degradation in periodontitis. Among host proteases degrading the extracellular matrix, matrix metalloproteinases (MMPs) are highly related to tissue destruction and remodeling events in periodontal diseases. The initial split of gingival and periodontal ligament collagens is a key feature of progressive and active periodontitis lesions or pockets, and this initial cleavage is carried out by the host cell-derived MMPs. It has been suggested that increased number and activity of phagocytes in periodontitis lesion results in a high degree of reactive oxygen species (ROS) such as superoxide anion, hydrogen peroxide, nitric oxide, peroxynitrite. There are few reports on the relationship between ROS and MMPs expressions in gingival fibroblast. This study showed that, especially nitric oxide, could be the critical mediator of periodontal disease progression through control of MMP-2 expression in gingival fibroblast possibly via Ras/NF-kappa B pathway.

효율적인 상업부기교과 학습을 위한 CAI 프로그램설계 및 구현에 관한 연구

홍인식,신태균 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3

In the information society, reasonable and efficient attitude is required in ordinary life. It is regarded as a liberal art in these days therefore commercial book-keeping is needed not only by people who engage in business but also by common people. For this reason, the students should take the commercial economics, commercial book-keeping and electronic data processing system as compulsory subjects in vocational course of general high school in 6th curriculum. The purpose of this paper is to examine how commercial book-keeping using the CAI program can influence classwork achievement and to search for an effective learning method to implement this program.

응급실을 내원한 구강악안면외과 안면골 골절 환자의 변화에 대한 비교 연구

신상훈,성화식,강영훈,황대석,김용덕,김욱규,김종렬,정인교 부산대학교 병원 암연구소 2008 부산대병원학술지 Vol.- No.24

Although there have been many clinical studies about the facial trauma in the recent as well as in the past, severity and frequency of facial trauma are reported multifarious. It seemed to be because of variety of social, cultural, and environmental factors, and the view point of investigators. In this study, we investigated about the patients visiting emergency room during recent 4 years(2004-2007), and compared with retrospective study during former 10 years(1992-1996, 1999-2003) in Dept. OMS Pusan National University Hospital. We assessed the cause, type, demographic, etc, and analyzed alterations of facial bone fractures during past 3 periods. The results were as follows. The total number of patients was increased. 429 patients treated for maxillofacial fractures between January 1992 and December 1996, 466 patients treated between January 1992 and December 1996 and 764 patients treated between January 2004 and December 2007. The male-to-female ratio were 4.6:1, 3.9:1, and 4.16:1, respectively. Patient in the age groups of 10-19 years and 20-29 years increased in the latter two periods. Assaults and falls are decreased gradually, but slip down s are increased. Traffic accidents are still major cause of facial trauma. The mandibular fractures showed the highest incidence thorought three periods. Symphysis fractures of mandible was increased and condyle fractures of mandible was drecreased in the third period.

A Study on an Apparatus for the Metal Material Thickness Measurement in High Temperature by Magnetostrictive Ultrasonic Method

Ji Yeon Shin(신지연),Ting Ting Zhang(장팅팅),Tong In Oh(오동인),Soo Woon Park(박수운),Yong Cheol Kim(김용철),Seung Bong Lee(이승봉),Kwang Sik Yoon(윤광식),Kil Mo Koo(구길모) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8

In vary high temperature conditions a metal material thickness measurement is of importance in the phenomena associated with the nuclear accident, in connection with the demonstration experiments of In-vessel phenomenon. In this case a hemispherical thickness measuring apparatus and method using a magnatostrictive ultrasonic wave that can be suggested to measure for this thickness change in real time as the ultrasonic wave apparatus is secured.

전후면과 좌우면상에서의 골프 퍼팅 동작이 정확성에 미치는 영향

신인식,은석덕,임비오,정철수 師範大學 體育硏究所 1999 서울大學校 體育硏究所論集 Vol.20 No.2

The purpose of this study was to compare two putting styles in direction and distance by analyzing the results of the statistical analysis. One style was a performed by conventional putter, the other style was performed by a newly manufactured putter. A conventional putter was performed in frontal plane and A newly manufactured putter was performed in sagital plane. Six expert and sixteen novice subjects executed thirty times per putter and distance as accurately as possible, in order to reach a target distance of 4 and 7 m. The distance at which the balls stopped away from the cup was measured and analyzed statistically. According to statistical analysis, in distance, the style which performed in sagital planes was better than the style which performed in frontal planes in novice and expert. Therefore, the traditional method of putting may not be the best technique for golfers; other methods such as using a newly performed styles may be more effective.

비디오시스템과의 일체형 지면반력 Windows 프로그램 개발

신인식,문영진,정철수,이기청 서울대학교 체육연구소 2000 서울大學校 體育硏究所論集 Vol.21 No.2

The study was designed to develop the window version force platform from the former program operated in DOS version. The window version program was developed utilizing a visual-basic program of Microsoft Inc. The characteristics of the program are as follows: 1.The compatibility among the board was enhanced so that all AD board of Data Translation Inc. can be utilized. 2.The program can be operated with the connection to the image analysis system which consists of force platform and D-5100 Panasonic Video Camera. 3.The automation of analysis was achieved so that the variable can be analyzed immediately after the button on the force platform was pressed. 4.Multi-file processing was adopted so that several files can be performed simultaneously for the analysis. 5.The program was designed in user-friendly mode. The program can be operated by even novice because the main menu was composed in flowchart format. There were not significant differences between the values obtained utilizing the program developed in the present study and the former program. The present results suggest that the program developed in this study may have advantage with regard to conveniency and economical efficiency over the expensive programs imported from the foreign countries.