이기종 운영체계에 기반한 고성능 트랜잭션 처리 시스템의 개발

김기형,남영환,조행래 嶺南大學校 工業技術硏究所 1998 工業技術硏究所論文集 Vol.26 No.2

Recently, workstation clusters have been utilized for high performance transaction processing systems. In such systems, transactions are usually processed by multi-threads. Workstations in the clusters can have heterogeneous operating systems in the viewpoint of the thread processing mechanism. This paper focuses on the portability issues which should be considered from the design stage of the workstation cluster-based transaction processing systems. Especially, this paper analyzes the differences between single-threaded and multi-threaded operating systems. Based on this analysis this paper presents the architecture of a high performance transaction processing system which works on both operating systems.

모유 수유아와 조제 분유 영양아에서 수유 방법에 따른 아미노산 농도 비교 및 혈청 트립토판 농도와 수면 유도와의 관계

정다운,김은영,양은석,박상기,박영봉,문경래 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.2

Objective: Sleep behavior is modulated by serotonergic neurons within the brain, and the synthesis and release of serotonin by such neurons is thought to be influenced by the availability of tryptophan, the amino acid precursor of serotonin. Formula-feeding infants have depressed plasma tryptophan concentration relative to breast milk-feeding infants. Because tryptophan alters sleep waking patterns in adults, a study was designed to determine the difference of sleep latency relative to differences in plasma tryptophan and tryptophan : large neutral amino acid (LNAA) ratio between formula-feeding infants and breast milk-feeding infants. Method: 45 newborns who were born in Chosun University Hospital from December 2002 to December 2003 were selected. The newborns were divided to three group, 15 newborns were fed breast milk and 15 newborns were fed formula A, and last 15 newborns were fed formula B. At 6 weeks and 12 weeks, infants were sampled for measuring of serum amino acid level and tryptophan, tryptophan : LNAA ratio. And we taught infants' parents to measure sleep latency that means the time after a feeding to the first episode of active REM sleep that persist ≥ 1 min. Result: 1) At 6weeks, Serum α-amino-n-butyric acid, citrulline, tryptophan level was higher in formula A group than breastmilk group (P<0.05) and proline level was lower than breast milk group (P<0.05). In formula B group, serum n-amino-n-buryric acid, citrulline, cystine, hydroxylysine, hydroxyproline, isoleucine, leucine, lysine, methionine, phenylalanine, taurine, threonine, valine levels were higher than breastmilk group (P<0.05). And Serum isoleucine, methionine, proline, valine level were higher in formula B group than formula A group (P<0.05). 2) At 12 weeks, serum glutamic acid, methionine, ornithine levels were higher in formula group A than breast milk group (P<0.05). Serum β-alanine, aspartic acid, α-amino-n-butyric acid, ethanolamine, glutamic acid, threonine level were higher in formula B group than breast milk group (P<0.05). Serum β-alanine, ethanolamine levels were higher and arginine level was lower in formula B group than formula A (P<0.05). 3) At 6 weeks, serum tryptophan concentration and tryptophan: LNAA ratio were higher in formula A group (P<0.05). Sleep latency was 21 minutes in formula group A, 24 minutes in breast milk group, 25 minutes in formula B group but there was no statistically significance (P>0.05). 4) At 12 weeks, serum tryptophan concentration and tryptophan: LNAA ratio, time after feeding to the first episode of active REM sleep were no difference with each other group. Conclusion: There is significant difference of serum amino acids between breast-feeding infants and formula-feeding infants. And serum tryptophan and tryptophan: LNAA ratio differ between brest-feeding infants and formula-feeding infants. But there is no association between serum tryptophan, tryptophan: LNM ratio and sleep latency.

아동기 가정 내 스트레스가 공동의존성에 미치는 영향 및 공동의존성과 정신병리와의 관련성

곽운환,손지욱,한규희,박철수,김장락,김붕년,김봉조,강여화,하형래 대한생물치료정신의학회 2003 생물치료정신의학 Vol.9 No.1

연구목적: 본 연구는 공동의존성에 영향을 미치는 아동기 가정내 스트레스 요인과 공동의존성과 다른 병리와의 연관성을 규명하고자 하였다. 더불어 특정한 질환에서의 공동의존성의 평가가 가지는 의의를 탐색해 보고자 하였다. 방 법: 연구 대상은 정상 일반인 남성집단 88명과 알코올리즘 남성 집단 76명으로 구성되어 있다. 평가도구는 본 저자가 직접 작성한 '아동기 가정내 스트레스 요인 측정용 설문'과 공동의존 척도(RPS), 간이증상 진단검사(SCL-90-R)를 사용하였다. 통계적 분석은 Mann-Whitmey test, Kruskall- Wallis test, Multiple linear regression analysis, Spearman correlation analysis를 이용하였다. 결 과: 1) 정상 일반인 군과 알코올리즘 군의 공동의존성 평균값은 각각 49.12점(표준편차=15.41)과 88.31점(표준편차=17.48)이었다. 2) 정상 일반인 군에서는 '아동기 부모 사별'(p<0.01) '부모의 알코올리즘'(p<0.01) '부모의 상습적 구타'(p<0.01)의 3가지 요인에서, 알코올리즘 군에서는 '어린시절 부모 사별'(p<0.01) '부모의 알코올리즘'(p<0.01) '부모의 상습적 구타'(p<0.01) '부도의 도박'(p<0.01) '사회 병질자 부모의 존재'(p<0.05)의 5가지 요인에서 스트레스 유무에 따라 공동의존성에 유의한 차이를 보였다. 3) 두 집단 동시에 SCR-90-R의 8개 소척도 중 '대인관계 예민성'이 공동의존성과 가장 높은 연관성(rs>0.06, p<0.01)을 보였다. 이외에도 '우울증' '불안증'등이 두 집단 모두에서 통계적으로 유의한 연관성을 보였다. 결 론: 본 연구는 부모의 알코올리즘뿐만 아니라 여러 가정 내 스트레스 요인이 공동의존성의 발생에 영향을 미칠 수 있음과 공동의존성이 높은 집단이 다른 정신과 질환을 동반할 가능성이 높음을 증명한다고 할 수 있다. Objectives : The aim of this study was to examine the relationships of codependency with family stressors in childhood and psychopathology. Methods : Subjects were a group of 88 normal adult males and a group of 76 alcoholic males. The degree of codependency was assessed with the Korean version of Recovery Potential Survey(RPS). All subjects filled out questionnaires regarding demographic information and family stressors. The psychopathology was measured by self-administred questionnaires using Symptom Check List-90-Revision(SCL-90-R). Results : 1) There were no significant differences in codependency levels by sociodemographic characteristics in two groups, but obvious difference in mean of codependency scores(normal group : 49.12±15.41, alcoholism group : 88.31±17.48). 2) There were significant differences in codependency levels between the presence and absence of parental physical abuse, parental death, and parental alcoholism(p<0.01) in both groups. 3) Among family stressors, parental physical abuse had the largest contribution to codependency level in multiple linear regression. 4) There were significant correlations between the codependency levels and the scores of SCL-90-R's subscales of interpersonal sensitivity, depression, and anxiety in both groups. Conclusion : The codependency levels were related to some family stressors such as parental physical abuse, parental death, and parental alcoholism and the high-level codependency was correlated with higher level of psychopathology in both normal and alcoholism group. These results suggested that various family stressors, as well as parental alcoholism may be predictors of codependency, and codependency also may be a predictor of other psychiatric disorders.

The Influence of Carbonization Temperature and KOH Activation Ratio on the Microporosity of N-doped Activated Carbon Materials and Their Supercapacitive Behaviors

( Yeong-rae Son ),( Young-jung Heo ),( Eun-a Cho ),( Soo-jin Park ) 한국복합재료학회 2018 Composites research Vol.31 No.5

A facile method for the preparation of nitrogen-doped microporous carbon via the pyrolysis of poly(vinylidene fluoride) (PVDF) using polypyrrole (PPy) as a selective nitrogen source was developed. A PVDF/PPy- 800 sample (carbonized at 800°C) with a 1:0.5 ratio of PVDF and PPy exhibited the highest micropore volume. The activated microporous carbon materials obtained from PVDF/PPy-800 prepared at 800°C with KOH possessed a large specific surface area and narrow pore-size distribution. They were characterized using N₂ adsorption at 77 K and argon (Ar) adsorption at 87 K, which allowed for the characterization of the narrow microporosity of the prepared materials due to the absence of interactions between Ar and the sample surface. In addition, the activated microporous carbon material with a KOH/carbon ratio of 2:1 was found to exhibit the largest specific surface area (1296 m² g^-1 in N₂ at 77 K) and microporosity, and a high specific capacitance (122.8 F g^-1).

교통이벤트 정보의 자동 전송시스템 구현

정영래(Yeong Rae Jeong),장재훈(Jae Hoon Jang),강석근(Seog Geun Kang) 한국전자통신학회 2018 한국전자통신학회 논문지 Vol.13 No.5

본 논문에서는 교통정보의 자동 전송시스템에 대한 연구결과를 제시한다. 여기서는 구급차나 소방차와 같은 긴급차량의 진로를 방해하는 것을 교통이벤트로 정의한다. 차량 내부에 설치된 블랙박스에 기록되는 동영상으로부터 교통이벤트 발생이 판정되는 경우 해당 정보를 증거영상과 함께 전자우편을 통하여 자동적으로 관제선터에 전송하는 시스템을 구현하였다. 이를 위하여, 전방에서 주행하는 차량의 번호판으로부터 문자와 숫자를 인식하는 알고리즘, 교통이벤트 발생 판정알고리즘을 실현하였다. 또한, 신고를 위하여 텍스트와 영상 파일을 전자우편과 파일전송프로토콜을 통하여 자동 전송하는 기능도 추가하였다. 따라서 교통이벤트를 확장하여 제시된 시스템에 적용하면 다양한 교통법규 위반 사항에 대한 편리한 신고체계를 수립할 수 있으므로 교통법규 위반 사례를 크게 줄일 수 있을 것으로 판단된다. In this paper, an automatic transmission system of traffic information is presented. Here, a traffic event is defined as an obstacle to an emergency vehicle such as an ambulance or a fire truck. When a traffic event is detected from a video recorded by a black box installed in a vehicle, the implemented system automatically transmits a proof image and corresponding information to the control center through an e-mail. For this purpose, we realize an algorithm of identifying the numbers and a character from the license plate, and an algorithm for determining the occurrence of a traffic event. To report the event, a function for automatic transmission of the text and image files through e-mail and file transfer protocol (FTP) is also appended. Therefore, if the traffic event is extended and applied to the presented system, it will be possible to establish a convenient reporting system for the violation of various traffic regulations. In addition, it will contribute to significantly reduce the number of traffic violations against the regulations.

Effect of graphene oxide/carbon nanotube ratio on electrochemical behaviors of spongy bone-like reduced graphene oxide/carbon nanotube foam prepared by simple and green approach

Son, Yeong-Rae,Park, Soo-Jin Elsevier 2019 Chemical engineering journal Vol.373 No.-

<P><B>Abstract</B></P> <P>Modifying nano/micro structure of materials based on graphene has been studied extensively. However, the existing methods are complex and involve multi-step procedures. In this study, we successfully prepared graphene oxide (GO)/carbon nanotube (CNT) foams with different GO/CNT ratios by integrating GO nanosheets and CNTs in aqueous media of water and ethanol without using any other materials and further treatments. The GO sheets acted as a dispersing agent for CNTs in water by π-π interactions and the CNTs located at sp<SUP>2</SUP> carbon plane of GO which is non-oxidized carbon region provide conductive electron pathway and connect GO sheets. Ethanol molecules added to water inhibit the decrease of mobility of water as the temperature gets lower and prevent the growth of ice crystals. By exploiting the characteristics of the materials and media, it was possible to fabricate macroscopic, stereoscopic, and continuous spongy bone-like GO/CNT hybrid foams in an eco-friendly and straightforward manner. Furthermore, the GO/CNT foam could be reduced by thermal treatment without deformation, resulting in a graphene-based foam capable of energy storage. A supercapacitor consisting of the reduced foam as electrode and GO membrane as separator was fabricated. The resultant supercapacitor was stably operated in different electrolytes and showed distinctive electrochemical behaviors. The inserted CNTs between reduced GO layers and spongy bone-like structure increased the accessible areas of the electrolytes and led to rapid electrolyte ion diffusion, indicating that energy and power characteristics were improved by nano/micro structure mediation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Green approach to preparation of macroscopic graphene oxide/CNTs hybrid foam. </LI> <LI> Inhibition of ice crystal growth by ethanol at low temperature. </LI> <LI> Nano/micrometric scale structure mediation by simple engineering. </LI> <LI> Supercapacitor consisting of only graphene-based electrodes and separator. </LI> <LI> Improving energy and power characteristics by adjustment of GO/CNT ratio. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

대기요소 고려를 통한 무인항공기 비행시험계획 수립에 대한 연구

김영래 ( Yeong Rae Kim ),이정숙 ( Jeong Suk Lee ),이상철 ( Sang Cheol Lee ),고상호 ( Sang Ho Ko ),강자영 ( Ja Yeong Kang ),최종욱 ( Jong Uk Choi ),성덕용 ( Deoky Yong Seong ) 한국항공운항학회 2010 한국항공운항학회지 Vol.18 No.4

Flight test is the final and a mandatory process for the development of unmanned aerial vehicles(UAVs) as well as manned. Since most UAVs fly in a low speed and are prone to adverse weather conditions such as air turbulence, atmospheric weather environment around flight test regions will be a critical item to be considered for a flight test planning for UAVs. In this paper, we suggest a decision method for a UAV flight test schedule based on weather conditions of surface and upper atmospheres and also introduce a program for an effective flight test planning through weather forecasts.

비접촉식 회전축 토크 측정시스템 성능 평가

김영호(Yeong Ho Kim),김영환(Yeong Hwan Kim),조경래(Gyeong Rae Cho),김의간(Ue Kan Kim),도덕희(Deog Hee Doh) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.4

주광을 고려한 조명에너지 요구량 산정 방법에 대한 고찰

손영익(Yeong Ik Son),장문기(Mun Ki Jang),김영래(Yeong Rae Kim),김성민(Sung Min Kim) 대한설비공학회 2020 대한설비공학회 학술발표대회논문집 Vol.2020 No.6

범국가적인 온실가스 감축 달성 목표 중 건축 부문의 온실가스 감축은 지속적으로 강조되고 있다. 건축설계 중 에너지 절감 계획의 요소 중 하나인 자연채광은 광범위한 활용 가능성과 패시브 건축물에서의 주광 도입의 중요성으로 인해 에너지 절감을 위한 건축 환경 구현에 다양한 방법으로 적용되고 있다. 이러한 주광 에너지는 조명에너지 요구량과 밀접한 연관이 있을 뿐 아니라 내부 발열 에너지로 산정되어 냉난방 요구량 계산에도 큰 영향을 미친다. 국내 에너지 평가프로그램의 경우 조명에너지 산정에서 주광을 고려하지 않고 있다. 본 연구에서는 국내 건물에너지 효율등급 및 제로에너지 등급의 기반이 되는 독일 기술규격 DIN V 18599:2016을 분석하고 창문을 통한 주광과 주광 시간을 고려한 계산방식에 대해 제안하고자 한다. 창문 면적과 작업 면 높이 등을 통한 주광 면적의 산정, 지역별 일출·일몰 시간을 반영한 주광 시간의 계산을 구체화하였다. 현재 건축에너지효율 등급 평가를 위해 개발된 ECO2 프로그램과 평가방식 및 오차를 확인하기 위해 비교·검증을 수행하였다.

메타인지 능력을 기반으로 한 다문화사회의 다중적 정체성 형성

김래영 ( Kim Rae-yeong ) 한국초등도덕교육학회 2017 초등도덕교육 Vol.0 No.55

다문화사회에서는 개인을 둘러싼 환경의 범주가 보다 다층적이고 역동적이다. 인간은 환경과 상호작용하며 자신의 정체성을 형성하기 때문에 현대의 다문화사회에서는 단편적인 정체성이 아닌 다중적 정체성이 요구되고 있는 실정이다. 한편, 개인이 정체성을 형성하는 과정에서 각 범주의 정체성들이 서로 조화를 이루어 바른 다중적 정체성이 형성되도록 하기 위해서는 메타인지가 중요한 역할을 할 수 있다. 메타인지는 `자신의 인지에 대한 인지`또는 `사고 과정에 대한 모니터링`등의 기능을 하는 보다 고차원적인 인지작용이기 때문이다. 이에 따라 본 연구는 구체적으로 메타인지와 다중적 정체성 사이의 관련성을 살펴보고, 이를 활용한 다문화교육 프로그램을 구안하여 다문화교육 개선에 일조하고자 한다. In multicultural societies the scope of the circumstances surrounding the individual is more multi-layered and dynamic. Human makes their identity interacting with the environment, it has been needed multiple identities rather than simple in the modern multicultural society. In this vein, metacognition can play an important role to form appropriate multiple identities and ensure the identities of each category in harmony with each other in the process of forming an identity. Because Metacognition such as `cognition of cognition` or `monitoring of the thinking process` is the higher level cognitive function. Accordingly, this study specifically examined the relationship between metacognition and multiple identity and then developed the multicultural education program using this. It should contribute to improve multicultural education by taking advantage of this program.