소프트웨어 변경관리 노력 추정 모델

손혜정,이병걸 서울여자대학교 컴퓨터과학연구소 2007 정보기술논문지 Vol.5 No.-

소프트웨어 개발주기에서 변경작업은 빈번하게 일어나며, 반드시 관리의 대상이 되어야 한다. 뿐만 아니라 변경작업에 대한 정량적인 측정을 통해 불필요하게 일어나는 변경작업의 원인을 찾아 제거해야 한다. 기존에 가장 널리 알려진 변경관리의 공수(Change Effort)를 추정할 수 있도록 제안된 모델은 개발자의 주관적인 요소가 포함되어 있어 모델의 성능을 검증해볼 수 없는 단점이 있으며, 그 외의 제안되어 있는 모델의 수가 적어 그 성능의 비교가 쉽지 않다. 따라서 본 논문에서는 NASA MDP Dataset 내의 defect data를 이용한 통계분석을 통해 모델을 객관적 요소로 구성하였고, 기존 모델에서 배재된 변경작업의 우선순위라는 새로운 변수를 추가했다. 본 논문에서 제안된 모델은 기존 모델에 비해 일반적인 적용이 쉽고, 개발 조직에서 변경 관리 노력을 추정함으로써 이를 통해 형상관리의 도입 시점을 예측할 수 있다. Changes occurs frequently in software life cycle, so should be managed. Moreover, unnecessary changing factors should be terminated by quantitative measurements. Current studies suggested to infer change efforts includes the subjective factors of development. Thus it is hard to be verified and be compared to a small number of suggested models. This paper proposes a new model consisting of objective factors through statistical analysis using defect data in NASA MDP Dataset. And we add a new factor priority of change to a model. The proposed model in this paper is more easier to apply and makes development organizations can estimate adoption time for Software Configuration Management(SCM) throughout inferring change effort.

숙명여자대학교 문신미술관 리브랜딩 프로젝트 -마케팅전략을 통한 디자인 문제점 해결을 중심으로-

류혜나,박예진,손예빈,송혜진,이종화,이진민,장미정,이성애 숙명여자대학교 산업디자인연구소 2017 숙명디자인학 연구 Vol.24 No.-

본 연구는 한국의 뿌리, 동양의 미의식을 동시에 지닌 숙명문화원의 가치를 끌어올리기 위해 ‘브랜드, 디자인, 마케팅’을 융합된 시점에서 바라보고 그래픽, 제품, 공간의 통합 및 구축하는 일련의 프로세스를 밝히는데 목적이 있다. 이에 본 연구 시간적 범위는 2017년 3월~6월까지 조사대상은 브랜딩이 미흡한 숙 명문화원의 문신미술관, 숙명박물관, 숙명역사박물관, 정영양자수박물관으로 한정한다. 그 결과, 디자인과 마케팅의 융합된 측면에서 도출된 브랜드스토리인 ‘문신의 작은 우주’는 조각가 문신의 가치관과 정체성을 유지하면서 지역사회와 소통하는 미술관으로서 포지셔닝 되었다. 또한, 문신미술관은 디자인과 마케팅 측면을 융합하여 로고, 사인물, 에코백, 머그컵 및 전시기획 등에 이르기까지 일관성과 객관성, 스토리성을 띄었다. 끝으로 본 연구는 문신미술관의 디자인과 마케팅을 융합하여 좀 더 체계화된 G·I, P·I, S·I의 통합 브랜드 매뉴얼을 만든 것에 의의가 있다

前腕部 經穴 取穴에서 骨度分寸法과 一夫法의 比較 硏究

박히준,채윤병,차웅석,박종배,이혜정,이향숙,인창식,고형균,김수영,최일환,김강식,문정배,배기태,유경환,육근영,정병주,손인철,임사비나 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2004 東西醫學硏究所 論文集 Vol.2004 No.-

Background : The cun measurement System, an essential and convenient method in locating acupoints, has been widely used in the practice of acupuncture. However, traditional cun measurement has been criticized for its lack of reliability. Objectives : The purposes of this study are to determine if one cun measured by the directional methods have a consistency with that of proportional methods and to investigate which factors are related with these differences, especially in forearm. Methods : The distance between the elbow crease and the wrist crease of forearm was compared to a reference value of one cun obtained by the directional method. In this method, one cun is one third of the distance between index finger and Small finger of a subject, measured at proximal interphalangeal joint. In addition, to investigate the factors influencing the differences between these two methods, we measured the height and body weight and calculated body mass index (BMI). Finally we analyzed the factors correlated with these lengths by linear regression test. Results : The results showed that one cun obtained by the directional methods were significantly different from one cun by the proportional methods in forearm. It was demonstrated that the length acquired with the directional method was more correlated with body weight and body mass index, while the length obtained by the proportional method was more correlated with the height.

한국 정상인에서 연령에 따른 뇌혈류분포와 혈류예비능의 변화 : Tc-99m HMPAO SPECT 에 의한 연구

문대혁,이희경,송호천,이재태,범희승,손혜경,정환정,민정준,김지열 대한핵의학회 1999 핵의학 분자영상 Vol.33 No.3

Purpose: The aim of this study was to evaluate the normal values of regional cerebral blood flow (rCBF) and cerebrovascular reserve (CVR) in normal children to aged volunteers using Tc-99m HMPAO. Materials and Methods: Thirty four right-handed normal volunteers (20 males, 14 females, mean age 40.3±24.9 years, range 4 to 82 years) were underwent rest/acetazolamide (ACZ) brain SPECT using Tc-99m HMPAO and the sequential injection and subtraction method. rCBF was estimated on the basis of a semiquantitative approach by means of right/left ratio, region/cerebellum and region to whole brain ratios in frontal, parietal, temporal, and occipital lobes, basal ganglia, thalami, and cerebellum. CVR was measured by means of % perfusion increase calculated as % mean count change compared to rest rCBF in each regions. Results: Mean values of right to left ratios range from 1.004 to 1.018. rCBF was highest in cerebellum and lowest in basal ganglia and thalami. Frontal and temporal rCBF decreased while occipital and thalami rCBF increased according to age. No sexual difference of rCBF was noted. Mean CVR was 29.9±12.9%. Mean CVR significantly increased to late teens, and declined thereafter. After 6th decade, CVR in both frontal lobes, left parietal lobe and right basal ganglia decreased significantly with advancing age. There was no sexual difference of CVR. Conclusion: Quantitative assessment of CVR was possible by ACZ Tc-99m HMPAO brain SPECT. It revealed that rCBF and CVR changed according to age in normal Korean volunteers. There was no sexual difference.

Variability of Fatigue Crack Initiation Life in Flux Cored Arc Welded API 2W Gr.50 Steel Joints

Sohn, Hye-Jeong,Kim, Seon-Jin Korean Society of Ocean Engineers 2012 International journal of ocean system engineering Vol.2 No.3

Flux Cored Arc Welding (FCAW) is a common practice to join thick plates such as the structural members of large scale offshore structures and very large container ships. The objective of this study was to investigate the mechanical properties and variability of the fatigue crack initiation life in the flux cored arc welded API 2W Gr.50 steel joints typically applied to offshore structures with a focus on the effect of the materials in fatigue crack growth life from the notch root of a compact tension specimen. Offshore structural steel (API 2W Gr.50) plates (60-mm thick) were used to fabricate multi-path flux core arc welded butt welded joints to clearly consider fatigue fractures at the weld zone from the notch. Fatigue tests were performed under a constant amplitude cyclic loading of R = 0.4. The mean fatigue crack initiation life of the HAZ specimen was the highest among the base metal (BM), weld metal (WM), and heat affected zone (HAZ). In addition, the coefficient of variation was the highest in the WMl specimen. The variability of the short fatigue crack growth rates from the notch tips in the WM and HAZ specimens was higher than in BM.

Development of a Test Method for the Evaluation of DNA Damage in Mouse Spermatogonial Stem Cells

Hye Lyun Jeon,Jung-Sun Yi,Tae Sung Kim,Youkyung Oh,Hye Jeong Lee,Minseong Lee,Jin Seok Bang,Kinarm Ko,Il Young Ahn,Kyungyuk Ko,Joohwan Kim,Hye-Kyung Park,Jong Kwon Lee,Soo Jung Sohn 한국독성학회 2017 Toxicological Research Vol.33 No.2

Although alternative test methods based on the 3Rs (Replacement, Reduction, Refinement) are being developed to replace animal testing in reproductive and developmental toxicology, they are still in an early stage. Consequently, we aimed to develop alternative test methods in male animals using mouse spermatogonial stem cells (mSSCs). Here, we modified the OECD TG 489 and optimized the in vitro comet assay in our previous study. This study aimed to verify the validity of in vitro tests involving mSSCs by comparing their results with those of in vivo tests using C57BL/6 mice by gavage. We selected hydroxyurea (HU), which is known to chemically induce male reproductive toxicity. The 50% inhibitory concentration (IC50) value of HU was 0.9 mM, as determined by the MTT assay. In the in vitro comet assay, % tail DNA and Olive tail moment (OTM) after HU administration increased significantly, compared to the control. Annexin V, PI staining and TUNEL assays showed that HU caused apoptosis in mSSCs. In order to compare in vitro tests with in vivo tests, the same substances were administered to male C57BL/6 mice. Reproductive toxicity was observed at 25, 50, 100, and 200 mg/kg/day as measured by clinical measures of reduction in sperm motility and testicular weight. The comet assay, DCFH-DA assay, H&E staining, and TUNEL assay were also performed. The results of the test with C57BL/6 mice were similar to those with mSSCs for HU treatment. Finally, linear regression analysis showed a strong positive correlation between results of in vitro tests and those of in vivo. In conclusion, the present study is the first to demonstrate the effect of HU-induced DNA damage, ROS formation, and apoptosis in mSSCs. Further, the results of the current study suggest that mSSCs could be a useful model to predict male reproductive toxicity.

초등학생의 학교 밖 문식 활동 조사 연구

정혜승 ( Hye Seung Chung ),김정자 ( Jeong Ja Kim ),민병곤 ( Byeong Gon Min ),손원숙 ( Won Sook Sohn ),백혜선 ( Hye Sun Paik ),백정이 ( Jeong Yi Baik ),박치범 ( Chi Beom Park ),오은하 ( Eun Ha Oh ),정현선 ( Hyeon Seon Jeong ) 한국독서학회 2013 독서연구 Vol.0 No.30

이 연구는 초등학생들의 학교 밖 문식 활동의 양상을 살펴 초등학생들의 언어 발달과 국어 활동에 대한 이해를 제고하고, 문식성 교육 개선을 위한 기본적인 정보를 탐색하는 데 주된 목적이 있다. 이를 위해 경기도 및 인천지역의 초등학교 3~6학년으로, 총 13개 초등학교와 각 학교별로 평균 397명, 총 5,110명을 대상으로 하여, 학교 밖에서 자발적으로 이루어지는 읽기와 쓰기 활동의 내용, 매체, 시간, 학습 시간, 독서량 등의 문식 활동의 실태와 이에 영향을 주는 부모, 선생님, 친구, TV, 대화 등의 영향 요인 및 국어 수업과의 관련성을 탐색하기 위한 설문 조사를 실시하였고, 그 실태를 학년별, 성별, 지역별로 분석하였다. 분석 결과 다음과 같은 몇 가지 특징을 발견 하였다. 첫째, 초등학생의 학교 밖 문식 활동은 쓰기보다 읽기를 중심으로 이루어 지는 경향이 있었다. 둘째, 학년이 올라갈수록 취미, 스포츠, 연예, 게임 등의 오락적 내용의 독서를 하는 경향이 나타났다. 셋째, 성별로 학교 밖 문식 활동에 유의한 차이가 있었다. 거의 모든 항목에서 여학생은 남학생보다 읽기, 쓰기를 더 많이 하고 있었으며, 이는 통계적으로 유의하였다. 넷째, 대도시, 중소도시, 읍면지역 중 읍면지역 학생들의 문식 활동이 낮게 나타났다. 다섯째, 학교 밖에서 문식 활동을 전혀 하지 않는다고 응답한 학생들이 적지 않았다. 여섯째, 학년이 올라갈수록 인쇄 매체인 책은 점차 덜 읽는 반면, 문자메시지, 스마트폰 무료 문자 서비스, 인터넷 자료, 전자우편, SNS를 읽는다는 응답이 5학년 이후 급격히 증가하였다. 쓰기 역시 학년이 올라 갈수록 전통적인 의미에서 글이라고 여겨지는 것은 점점 덜 쓰고, 휴대전화나 컴퓨터 등 매체 기반 쓰기는 점점 더 증가하는 경향을 보였다. 일곱째, 학교 밖 문식 활동을 하는 시간보다 사교육 관련 학습을 하는 시간이 더 길었다. 여덟째, 학생들은 국어 수업의 영향을 받아 학교 밖에서 자발적인 읽기, 쓰기를 더 하게 되었다는 것보다 자발적인 읽기, 쓰기 활동을 하면 국어 수업 시간에 하는 읽기, 쓰기가 좋아진다는 것에 더 긍정적인 응답을 했다. 이것은 학생들이 자신들의 학교 밖 문식 활동에 더 큰 의미를 부여하는 것으로 짐작된다. The purpose of this research is to find out the characteristics of South Korean elementary school students` out-of-literacy practices. This research is based on a large-scale survey of 5,110 children from third to sixth grade in 13 elementary schools (average 397 children in each school) in Gyeonggi-do and Incheon, South Korea. A questionnaire was implemented with questions on the content and medium of the students` voluntary reading and writing; the time they spend on their voluntary reading and writing as well as on their studies; how many books they read over the course of one month; how their parents, teachers, friends, television, dialogues with their parents, teachers, friends, and Korean classes might affect their voluntary reading and writing. The results of the survey were analyzed according to the students` grades, genders, and the areas where they live. The main findings were as follows. First, South Korean elementary school students read more readily than they write in out-of-school environments. Second, in terms of the content of reading, older students (upper-graders) read about hobbies, sports, entertainment and games more than younger students (lower-graders) do. Third, girls tend to read and write more than boys. Fourth, city-dwellers read and write more than rural residents. Fifth, a significant number of students do not read or write voluntarily at all. Sixth, older students (upper-graders), particularly fifth- and sixth-graders, read fewer books and more text messages on their cellphones, messages on social networking sites, web page content, and e-mails. They also write less on paper and more on computers and cellphones, especially smartphones. Seventh, children spend more time studying or being tutored at "cram schools" after school than they do reading and writing voluntarily. Last, the more children read and write voluntarily, the more enjoyable they find reading and writing in Korean class. As such, these children evaluate their out-of-school literacy practices more positively than other children.

플럭스코아드아크 용접된 API 2W 강의 표준 CT 시험편 노치에서의 피로균열 발생 및 전파

손혜정(Hye Jeong Sohn),손상훈(Sang Hoon Sohn),정천영(Cheon Young Jeong),김선진(Seon Jin Kim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5

API 2W Gr. 50 강재 용접부의 피로균열전파거동의 거시적 및 미시적 관찰

손혜정(Hye-Jeong Sohn),김선진(Seon-Jin Kim) 한국해양공학회 2012 韓國海洋工學會誌 Vol.26 No.5

It is well known that a considerable amount of scatter is shown in experimental results relating to fatigue crack growth even under identical and constant amplitude cyclic loading conditions. Moreover, flux cored arc welding (FCAW) is a common method used to join thick plates such as the structural members of large scale offshore structures and very large container ships. The objective of this study was to investigate the macro- and microscopic observations of the fatigue crack growth (FCG) behavior of the FCAWed API 2W Gr. 50 steel joints typically applied for offshore structures. In order to clearly understand the randomness of the fatigue crack growth behavior in the materials of three different zones, the weld metal (WM), heat affected zone (HAZ), and base metal (BM), experimental fatigue crack growth tests for each of five specimens were performed on ASTM standard compact tension (CT) specimens under constant amplitude cyclic loading. Special focus was placed on the fatigued facture surfaces. As a result, a different behavior was observed at the macro-level, depending on the type of material property: BM, HAZ, or WM. The variability in the fatigue crack growth rate for WM was higher than that of BM and HAZ.

다층 플럭스코아드아크 용접한 API 2W Gr. 50 강재의 피로균열전파율의 변동성 고찰

손혜정(Hye-Jeong Sohn),김선진(Seon-Jin Kim) 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5

Most of the components of marine and offshore structures are subjected to cyclic loading during their service time due to action of seawater waves and the sea environment in general. Fatigue failures in these structures can take place at sites of high stress concentration that can be classified into two major categories, that is, base material and weld joints. However, tt is well known that a considerable amount of scatter is shown in experimental results relating to fatigue crack growth even under identical and constant amplitude cyclic loading conditions. And also, it is well known that the Flux Cored Arc Welding (FCAW) is a common practice to join the thick plate such as structural members of large scale offshore structures and very larger container ships. The objective of this study is to investigate the variability of fatigue crack growth arte (FCGR) for the FCAWed API 2W Gr. 50 steel weldment typically applied for offshore structures. In order to investigate clearly the variability of fatigue crack growth rate for the materials of three different zones WM, HAZ and BM, experimental fatigue crack growth tests for each five specimens were performed on ASTM standard compact tension (CT) specimens under constant amplitude cyclic loading. It was shown that the variability of FCGR for WM specimen was higher than those of HAZ and BM, especially in low driving force region, and the probability distribution of FCGR was followed well Weibull distribution.