Tool을 이용한 요구 명세서 작성

신재선,이성주 조선대학교 기초과학연구소 1988 自然科學硏究 Vol.11 No.1

Jae Seon Shin Sung Joo Lee This thesis describes an approach to requirements specification in which different aspects of requirements specification are expressed using multiple models. This thesis also describes an interactive software tool named Model-Box, Which supports the construction and analysis of requirements models via textual and graphical representations. Model-Box allows users to define appropriate new models for the aspects they want to describe, without restriction to a single modeling methodology.

Photonic Crystals: Integration of Colloidal Photonic Crystals toward Miniaturized Spectrometers (Adv. Mater. 9/2010)

Kim, Shin-Hyun,Park, Hyo Sung,Choi, Jae Hoon,Shim, Jae Won,Yang, Seung-Man WILEY-VCH Verlag 2010 Advanced materials Vol.22 No.9

<B>Graphic Abstract</B> <P>The cover shows a schematic illustration of patterned colloidal photonic crystals with different bandgap positions. When an unknown light source impinges on the patterned photonic crystals, the light information can be identified from the reflection intensity profile of the constituent photonic crystals. The two optical microscopy images and background image display integrated photonic crystals with 20 different bandgaps spanning the entire visible range, and the SEM image shows the cross-section of the photonic crystal stripes, as reported by Shin-Hyun Kim, Seung-Man Yang, and co-workers on p. 946. <img src='wiley_img_2010/09359648-2010-22-9-ADMA201090022-content.gif' alt='wiley_img_2010/09359648-2010-22-9-ADMA201090022-content'> </P>

웨이브렛 계수 Zero Crossings를 이용한 영상의 잡음제거 및 압축

신재호,이용준,은종숙,이성우 동국대학교 산업기술연구원 1997 산업기술논문집 Vol.10 No.-

윤곽선이나 에지같은 영상 데이터의 중요한 성분들은 웨이브렛 계수의 zero crossings를 통해 검출할 수 있다. 이런 방법은 영상의 패턴 인식에 관한 연구에서 sharp variation points를 검출하는데 사용되었다. 웨이브렛 변환과 zero-crossings를 거쳐 국부 극치의 위치를 검출하는데 이 방법을 적용하여서 영상의 잡음제거에 사용하도록 개선하였다. 더욱이 영상 데이터에서 전체 영상의 픽셀과 정보를 저장하는 대신, 대부분의 중요한 성분을 효과적으로 몇몇 국부 극치값으로 압축하였다. 그 결과 새로 개선된 기법은 패턴 인식 분야에서만 아니라 높은 압축률의 잡음 제거에도 사용될 수 있다. The important image data components such as contours and edges could be detected by zero crossings of wavelet coefficient. This method has been used for the studies on pattern recognition of images to detect sharp variation points. We have applied it to detection of the position of local maxima through zero-crossings and wavelet transform, so that it is improved to be used for noise-eliminating of image. In addition it could compress the image data into a few of local maxima which held the most of important component efficiently without saving All image pixels and information. As the result, the newly improved method could be implemented not merely for the field of pattern recognition but for that of noise removal at the higher compression ratio.

유한요소법을 이용한 환자별 교정시스템 구축의 기초 알고리즘 개발과 적용 : Development and Application of the Basic Algorithm

신정욱,남동석,김태우,이성재 대한치과교정학회 1997 대한치과교정학회지 Vol.27 No.5

본 연구는 최근 많은 연구가 행해지고 있는 유한요소를 이용한 교정시스템구축에 있어서 정상교합자가 아닌 부정교합 환자별 유한요소 모델구출을 위한 기초 알고리즘 개발에 그 목표가 있다. 기존에는 유한요소 분석을 위해서 한 환자의 치열을 유한요소 모델로 재현하고자 할때, 전처리 과정에 대부분의 시간을 소요해야만 했다. 본 연구에서는 이 전처리과정을 자동화할 수 있는 기초 알고리즘을 마련하여, 향후 이 방면의 연구를 용이하도록 하였다. 이를 위하여 임의로 선택된 부정교합 환자의 상하악 모형을 이용하여 치아의 삼차원적인 위치를 계측할 수 있는 표준화된 방법을 제시하였으며, 또한 본 연구를 통하여 개발된 프로그램을 이용하여 유한요소의 전처리과정을 자동화할 수 있는 기초을 마련하였다. 본 연구는 아래와 같은 단계를 거쳐 수행하였다. 1. 상, 하악 중절치에서 제2대구치까지 14개의 치아 형상을 상, 하악 각각 구축하여 개별 화일로 저장한다. 2. 이 치아에 standard bracket을 치관의 FA point와 bracket slot의 중앙이 일치되도록 부착한다. 3. 대상 환자의 석고 모형을 제작한다. 4. 석고 모형에서 본 연구를 위해 제작된 기구들로 치아의 crown inclination, angulation, 그리고 교합면에서 치관첨까지의 수직거리를 계측한다. 5. 표준화하여 촬영한 석고모형의 사진을 이용하여 화상처리기법으로 치아의 치열궁 형태를 파악한다. 또한 사진상에서 치아의 수평적 위치 및 회전량을 측정한다. 6. 계측된 crown inclination, angulation, 수직거리, 그리고 치열궁의 형태 미 치아의 회전정도 등을 회전행열을 이용하여 만든 프로그램에 입력한다. 이 프로그램은 유한요소 전처리 과정에 필요한 치아의 배열상태를 담고 있는 데이터를 결과파일로 제공하는데, 이 결과 파일은 일반적인 상용 유한요소 프로그램에서도 사용 가능하다. 7. 개개의 치아파일은 이 결과 파일에 따라 삼차원적인 위치로 배열되어 선택한 특정환자의 유한요소 모델을 완성하게 된다. 상기와 같은 여러 단계를 거친 후 임의로 선택한 부정교합자의 상, 하악 유한요소 모델구축을 위한 기초 자료를 구출할 수가 있었으며, 개개인 환자의 모형에서 얻은 정보로 유한요소 모델로 재현하기 위한 전처리과정의 기초 알고리즘을 마련하였다. The purpose of this study is to develop the basic algorithm for the finite element method modeling of individual malocclusions. Usually, a great deal of time is spent in preprocessing. To reduce the time required, we developed a standardized procedure for measuring the position of each tooth and a program to automatically preprocess. The following procedures were carried to complete this study. 1. Twenty-eight teeth morphologies were constructed three-dimensionally for the finite element analysis and saved as separate files. 2. Standard brackets were attached so that the FA points coincide with the center of the brackets. 3. The study model of a patient was made. 4. Using the study model, the crown inclination, angulation, and the vertical from the tip of a tooth was measured by using specially designed tools. 5. The arch form was determined from a picture of the model with an image processing technique. 6. The measured data were input as a rotational matrix. 7. The program provides an output file containing the necessary information about the three-dimensional position of teeth, which is applicable to several finite element programs commonly used. The program for a basic algorithm was made with Turbo-C and the subsequent outfile was applied to ANSYS. This standardized model measuring procedure and the program reduce the time required, especially for preprocessing and can be applied to other malocclusions easily.

정신분열병과 기분장애의 Cavum Septi Pellucidi에 관한 자기공명영상 연구

신상은,강민희,김철응,이정섭,배재남 대한신경정신의학회 2000 신경정신의학 Vol.39 No.4

연구목적: 뇌자기공명촬영술을 이용하여 정신분열병 환자와 기분장애 환자, 대조군의 Cavum Septi Pellucidi를 측정하여 정신분열병과 기분장애에서 생물학적인 원인 중 하나인 신경 발달학적 가설을 알아보는데 있다. 방법: 34명의 정신분열병 환자와 18명의 기분장애 환자, 22명의 대조군에게 자기공명촬영술을 시행하여 CSP의 출현 빈도 및 CSP의 크기에 따른 출현빈도를 비교분석하여 다음과 같은 결과를 얻었다. 결과: CSP의 출현 빈도는 정신분열병 환자에서 61%, 기분 장애환자에서 61%, 대조군에서 41%로 나타났다. T1 강조 축상 영상에서 가장 크게 보이는 단면에서 가로로 가장 긴 부분의 길이가 3mm 이상으로 정의한 큰 CSP의 출현빈도는 정신분혈병환자에서 24%, 기분 장애 환자에서 11%, 대조군에서 5%였고 정신분열병, 기분장애, 대조군의 순으로 높은 빈도를 보였으나 통계적인 유의성은 없었다. 결론: 정신분열병, 기분장애, 대조군의 순으로 큰 CSP의 빈도가 높은 경향성은 확인할수 있었으나 통계적으로 유의한 차이는 아니었다. 그러나 본 연구는 여러 가지 제한점이 있었기 때문에 신경발달학적 가설을 알아보기 위해서는 향후 환자수를 확대하고 보다 정교하게 고안된 연구가 필요하다. Objectives: This study was designed to verify neuro-developmental hypothesis of schizo-phrenia and mood disorder. Methods: We performed Brain Magnetic Resonance Imaging study in 34 schizophrenic patients, 18 mood disorder patients and 22 controls and compared the incidence and the size of carum septi pellucidi(CSP). Results: The incidences of CSP in schizophrenia, mood disorder and controls were 61%,61%, and 41%, respectively. The incidences of large CSP, defined as largest diameter larger than 3mm in T1-weighted image, were 24% in schizophrenic patients, 11% in mood disorder patients, and 5% in controls. But they didn't show statistically significant differences. Conclusion:We could find the tendency that the incidence of CSP was high as following order ; schizophrenia, mood disorder, controls. But it was not statistically significant difference. To verify neuro-developmental hypothesis, we need larger pool of patients and better study design.

Effect of Mn and C on Age Hardening of Fe–Mn–Al–C Lightweight Steels

Sung‑Won Park,Jun Young Park,Kyong Mox Cho,Jae Hoon Jang,Seong‑Jun Park,Joonoh Moon,Tae‑Ho Lee,Jong‑Ho Shin 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.3

The effects of Mn and C content on the age hardening of Fe–Mn–Al–C lightweight steels, which have austenitic or duplex(austenite and ferrite) microstructures, were investigated. An increase in Mn content induced a delay of the age hardeningthat is caused by the formation of intra-granular κ-carbides. In order to interpret the effect of Mn content, first-principlescalculations were conducted using the supercells of Fe24Al8C8,Fe24Al8C7,Fe24(Al7Mn)C8, and Fe24(Al7Mn)C7. The calculationsshowed that an increase in Mn content could be the source of the delay of the intra-granular κ-carbide formation bysuppressing C atom’ occupation of the vacancy at the body-centered site of L12. An increase in C content accelerated theformation of intra-granular κ-carbides, which induced the intense age hardening, and coarse inter-granular κ-carbides, whichresulted in significant decrease in impact absorbed energy due to inter-granular fracture.

Al 7075합금의 열간성형 및 반응고성형 공정에 따른 미세조직과 경도 특성

신평우,이상용,전재일 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-

Various precision forging processes were applied for Al 7075 alloy. Among the each forging parts produced by existing multi-stage forging, improved single-stage forging and thixoforging(new technology of a near-net shape manufacture), thixoforging was excellent at viewpoints of homogeneity and formability. Hardness values of each forging parts produced by single-stage forging and thixoforging process came close to existing multi-stage forging parts. Irregular grain boundary and particle for thixoforging process were homogenized by artificial aging treatment(T6) and the hardness value was increased considerably.

전통마을 경관보전에 관한 정책대안 연구

신상섭,허준,노재현 한국정원학회 2002 한국전통조경학회지 Vol.20 No.2

The purpose of this research make a counter proposal on the conservation state and policy of traditional village(Asan Woeam:牙山 外岩村, Andong Hahoe:安東 下回村, Kyeongju Yangdong:慶州 良洞村, Soonchun Nakaneupsung:順天 樂安邑城村) landscape. Up until now, it is true that the value of traditional village landscape had been buried and the conservation of those places has been measured only on the basis of their basis of their economic value. In the future, we will try to recognize the value of traditional village as the history of villagers lives and to cherish their diversity, that the current interests of people persist and also provides the opportunity to recover the beautiful landscape of traditional village. The conservation policy of traditional village landscape in the Korea must have designation as landscape cultural assets, introduction technique of landscape impact assessment, consolidation of landscape state, land use system adjustment, participation of landscape specialist, toward sustainable tradition village, introduction of new community village idea. Also, there are necessary set up of traditional landscape design criteria and master plan, operation of landscape impact evaluation.

지역사회 거주 저소득층 노인의 우울증상 유병률과 관련인자

신희영,이훈,신일선,김재민,김성완,양수진,윤진상 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.5

Objectives : This study aimed to investigate the prevalence and correlates of depressive symptoms in community-dwelling low income elderly. Methods : A community survey of 1,351 low income residents aged 65 or over was conducted in Buk district of Gwangju, Korea. Depressive symptom was evaluated by the Korean Form of the Geriatric Depression Scale (KGDS). Their Sociodemographic factors, the precence of chronic physical illness, and cognitive functions were investigated. Results : The prevalence rate of depressive symptoms was 69.8%. In multiple logistic regression, chronic physical illness (Odds Ratio : 2.68, 95% Confidence Interval : 1.98-3.63), low education (Odds Ratio : 1.84, 95% Confidence Interval : 1.39-2.43), and cognitive impairment (Odds Ratio : 1.61, 95% Confidence Interval : 1.20-2.16) were independently associated with depressive symptoms. Conclusion : Depressive symptoms in community-dwelling low income elderly were very common, particularly related to current chronic physical illnesses. The results of this study can be useful for the development of community-based prevention and management programs for depression. Of elderleg.

L-라이신 발효에 있어서 당밀전처리의 영향

신현철,김성준,성진석,전영중,이재흥 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.3

Can molasses, the most widely used carbon source for the industrial fermentation of L-lysine, usually contains a high concentration of calcium ions which tend to cause scaling problem in the recovery process. To remove the calcium ions, cane molasses was pretreated with sulfuric acid by adjusting the pH to 2.5~3.5. When the pretreated solution was directly heat-sterilized and used in the fermentation, a significant reduction in L-lysine production was observed. In this paper, we proved that sucrose is a superior substrate for L-lysine fermentation of that of glucose or fructose and that the above-mentioned decrease of L-lysine production was caused by the hydrolysis of sucrose in the molasses when the molasses was heat-sterilized at a low pH. The problem was overcome by adjusting the pH of molasses to neutral before sterilization.