특성불안이 높은 성인과 낮은 성인에서 알코올이 정신운동성 수행과 주관적 평가에 미치는 영향

용화영,윤보현,윤진상 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.5

Objectives : The purpose of this study was to evaluate effects of alcohol on psychomotor performance and subjective assessments in normal adults with high and low trait anxiety. Methods : The subjects consisted of 11 men in each group were tested with two doses of alcohol(0.25g/㎏ and 0.75g/㎏). Blood alcohol concentration(BAC), psychomotor performance(critical flicker fusion threshold, CFFT ; choice reaction time, CRT) and subjective assessment were measured at pre-alcohol baseline and 20, 40, 80, and 160 minutes after intake of alcohol. Results : 1) There was no significant difference in BACs between two groups at any time points after intake of each dose of alcohol. 2) After intake of 0.25g/kg alcohol, high anxiety group, compared to low anxiety group, reported less anxious and more relaxed feelings. In psychomotor performance test, however, there was no significant difference between the two groups. 3) After intake of 0.75g/kg alcohol, CFFT was increased in high anxiety group while it was decreased in low anxiety group. In subjective assessment, only high anxiety group tended to show more positive response. Conclusion : These results imply that alcohol may be more beneficial in individuals with high trait anxiety than those with low trait anxiety in terms of objective performance and subjective feelings. Furthermore, these suggest that the alcohol benefits might contribute to drinking more alcohol and frequently in individuals with high trait-anxiety.

시뮬레이션과 다중 회귀모형을 이용한 동시조달수리부속 최적화

김경록,용화영,권기상,Kim, Kyung-Rok,Yong, Hwa-Young,Kwon, Ki-Sang 한국시뮬레이션학회 2012 한국시뮬레이션학회 논문지 Vol.21 No.3

최근 방위 산업에는 장비가 군에서 요구한 임무를 완수하기 위해 장비 설계, 운용, 그리고 정비 측면에서 많은 연구가 이루어지고 있다. 그 중 동시조달수리부속은 장비가 군에 납품될 때 함께 들어가는 수리부속으로써, 이것을 분석하는 것은 장비의 운용가용도를 높이는데 가장 중요한 부분 중 하나이다. 그러나 이렇게 중요한 동시조달수리부속이지만 현실적 개발 환경을 고려한 공학적 분석 방법 발전 보다는 정책적인 방법으로 해결해 나가고 있는 실정이다. 그래서 본 연구에서는 동시조달수리부속 최적화를 위해 시뮬레이션과 다중 회귀모형 기법을 활용한 공학적 분석을 연구하였다. 먼저, 시뮬레이션 기법을 이용하여 가상으로 운용해보면서 정의된 보급 및 정비체계를 분석하고 이를 통해 품목별 동시조달수리부속의 수량을 변화에 따른 운용가용도의 변화 추이를 결과 자료로 산출하였다. 이렇게 얻은 입출력 자료를 통해 수리적 다중 회귀모형을 도출 후 선형계획법을 사용하여 동시조달수리부속 최적화를 하였다. 이때 최적화는 단가 제약을 두었다. 이 방법의 가장 큰 장점은 최적화 선정시 기준이 되는 제약조건의 변화에 빠르게 대응할 수 있다. 장비의 개발 단계에서는 품목별 단가는 지속적으로 바뀌기 마련이다. 이런 환경에서 제약조건이 바뀔 때 마다 시뮬레이션 분석을 재 수행하면 분석 속도가 늦어질 수밖에 없다. 그러므로 본 방법은 실제 개발 환경에 적합한 것이라 할 수 있다. 향후 이런 기본 개념을 바탕으로 시뮬레이션 모델링을 정밀화하고, 회귀모형의 정확성을 높여 연구의 완성도를 높일 것이다. Recently, the study in efficient operation, maintenance, and equipment-design have been growing rapidly in military industry to meet the required missions. Through out these studies, the importance of Concurrent Spare Parts(CSP) are emphasized. The CSP, which is critical to the operation and maintenance to enhance the availability, is offered together when a equipment is delivered. Despite its significance, th responsibility for determining the range and depth of CSP are done from administrative decision rather than engineering analysis. The purpose of the paper is to optimize the number of CSP per item using simulation and multiple regression. First, the result, as the change of operational availability, was gained from changing the number of change in simulation model. Second, mathematical regression was computed from the input and output data, and the number of CSP was optimized by multiple regression and linear programming; the constraint condition is the cost for optimization. The advantage of this study is to respond with the transition of constraint condition quickly. The cost per item is consistently altered in the development state of equipment. The speed of analysis, that simulation method is continuously performed whenever constraint condition is repeatedly altered, would be down. Therefore, this study is suitable for real development environment. In the future, the study based on the above concept improves the accuracy of optimization by the technical progress of multiple regression.

무기체계 CBT 사용성 평가를 위한 평가 기준 개발

권철,용화영,김두정,이혜원,이기원,홍원기 대한산업공학회 2014 대한산업공학회 추계학술대회논문집 Vol.2014 No.11

회로카드의 실제 발열온도를 고려한 무기체계 신뢰도 예측기법 연구

임성준,용화영,정재우,박경덕,차종한 대한산업공학회 2017 대한산업공학회 추계학술대회논문집 Vol.2017 No.11

동작인식기술을 이용한 정비교육체계 설계에 관한 연구

김정윤,이종신,용화영,김지영,박경덕 한국경영과학회 2011 한국경영과학회 학술대회논문집 Vol.2011 No.5

Gesture-Recognition is the technique that is making a interface between computer and human with interpreting human gestures via mathematical algorithms. With the progress of computer vision and image processing technique, it is expected to become a new human-machine interface which is able to alternate the keyboard and mouse. In this Study, As an ini t ia l st ep of research, We will introduce the result of research about applying gesture-recognition technique to perform the basic control of digital mock-up system using gesture-recognition sensor. And propose the ways to apply gesture-recognition technology into the military training system.

동작인식기술을 이용한 정비교육체계 설계에 관한 연구

김정윤,이종신,용화영,김지영,박경덕 대한산업공학회 2011 대한산업공학회 춘계학술대회논문집 Vol.2011 No.5

Gesture-Recognition is the technique that is making a interface between computer and human with interpreting human gestures via mathematical algorithms. With the progress of computer vision and image processing technique, it is expected to become a new human-machine interface which is able to alternate the keyboard and mouse. In this Study, As an ini t ia l st ep of research, We will introduce the result of research about applying gesture-recognition technique to perform the basic control of digital mock-up system using gesture-recognition sensor. And propose the ways to apply gesture-recognition technology into the military training system.

환경데이터 기반 유휴(dormant) 유도탄 상태 진단 및 모니터링 방안 연구

이연호(Younho Lee),용화영(Hwayoung Yong),정재우(Jaewoo Jung),김지원(Jiwon Kim) 한국신뢰성학회 2022 신뢰성응용연구 Vol.22 No.3

신뢰도 예측 기반 신뢰도 성장 관리 : 감시체계 사례

김상부,박우재,유재우,이자경,용화영 한국품질경영학회 2019 품질경영학회지 Vol.47 No.1

Purpose: In this study, a reliability prediction based reliability growth management is suggested especially for the early development phase of a system and the case study of surveillance system is given. Methods: The proposed reliability prediction based reliability growth management procedures consists of 7 Steps. In Step 1, the stages for reliability growth management are classified according to the major design changes. From Step 2 to Step 5, system reliability is predicted based on reliability structures and the predicted reliabilities of subsystems (Level 2) and modules (Level 3). At each stage, by comparing the predicted system reliability with that of the previous stage, the reliability growth of the system is checked in Step 6. In Step 7, when the predicted value of sustem reliability does not satisfy the reliability goal, some design alternatives are considered and suggested to improve the system reliability. Results: The proposed reliability prediction based reliability growth management can be an efficient alternative for managing reliability growth of a system in its early development phase. The case study shows that it is applicable to weapon system such as a surveillance system. Conclusion: In this study, the procedures for a reliability prediction based reliability growth management are proposed to satisfy the reliability goal of the system efficiently. And it is expected that the use of the proposed procedures would reduce, in the test and evaluation phase, the number of corrective actions and its cost as well.

H체계 RAM 목표 값 설정

유재우,박우재,김상부,최재경,최태한,유은지,용화영 한국신뢰성학회 2017 한국신뢰성학회 학술대회논문집 Vol.2017 No.11

무기체계 소프트웨어 GUI에 대한 사용성 평가 요소 도출

김두정(Kim, Du-Jeong),이혜원(Lee, Hye-Won),정주현(Jung, Joo-Hyun),용화영(Yong, Hwa-young) 한국산학기술학회 2015 한국산학기술학회논문지 Vol.16 No.12

기술이 고도화, 다양화되면서 소프트웨어의 발전이 급격하게 이루어지고 있다. 이에 따라 소프트웨어 GUI (Graphical User Interface)의 사용성(Usability)에 대한 연구가 활발하게 진행 중이다. 그럼에도 불구하고 무기체계 소프트웨어는 GUI의 사용성에 대한 연구가 부족한 실정이다. 이에 본 논문에서는 무기체계 소프트웨어 GUI에 대한 사용성 평가 항목을 도출하고 설계 우선순위를 도출하였다. 사용성 평가 항목을 도출하기 위해 전문가 평가를 통해 사용성 평가에 대한 기준요소 (Attributes)와 설계요소(Design factors)를 선정하였다. 또한 AHP(Analytical Hierarchy Process)와 매트릭스(matrix) 분석을 이 용하여 각각 기준요소의 상대적 중요도와 기준요소와 설계요소간 연관성을 파악하여 최종적으로 설계 우선순위를 도출하였 다. 그 결과, 정보제공성(Informativity)과 정보접근성(Accessibility), 가시성(Visibility)의 중요도가 0.127, 0.121, 0.108로 도출 됨에 따라 기타 요소에 비해 우선적으로 평가하는 것이 바람직할 것으로 판단된다. 본 연구는 무기체계 소프트웨어 GUI의 사용성 평가에 대한 기반 연구로 활용될 수 있을 것이다. With the technology of our time growing sophisticated everyday, softwares advance rapidly in accordance. Reflecting this trend, researches on Usability of S/W GUI(Graphical User Interface) is actively taking place. However, despite the active researches on such topic, Usability study of S/W GUI for weapon system remains insufficient. For such reason, this paper intends to focus on drawing evaluation factors as well as priority of design factors for Usability of S/W GUI for weapon system. For an accurate and reliable result, Usability evaluation attributes & design factors were assessed by professionals. Moreover, by incorporating AHP(Analytical Hierarchy Process) and Matrix analysis, each evaluation attributes' level of importance and relation between design factors & usability attributes were assessed to draw final design priority. As a result, the importance of Informativity, Accessibility, and Visibility were derived as 0.127, 0.121, 0.108, and selected to be the foremost priority for evaluating. This research could be utilized as foundation for usability evaluation of S/W GUI on weapon system.