광선추적법 기반의 적분구 분석 시뮬레이터에서 OpenMP 지시어를 이용한 속도 향상 및 몬테카를로 방법의 무작위성 보장

김승용,김대찬,오범환,박세근,이일항,이승걸,Kim, Seung-Yong,Kim, Dae-Chan,O, Beom-Hoan,Park, Se-Geun,Lee, El-Hang,Lee, Seung-Gol 한국광학회 2011 한국광학회지 Vol.22 No.2

광선추적법을 기반으로 하는 적분구 분석 시뮬레이터의 계산속도를 향상하기 위하여 OpenMP 지시어를 이용한 병렬처리 방식의 시뮬레이터를 개발하였으며, 몬테카를로 방법의 무작위성을 보장하기 위해 병렬 난수 발생기인 RngStream 패키지를 활용하였다. $10^7$개 이상의 광선 수를 사용하여 0.5%의 오차 범위에서 적분구 이론식과 일치하는 결과를 얻을 수 있었으며, 스레드 수에 따른 계산속도 향상 효과를 확인하였다. 또한 적분구 문제에 관한 공간반응분포함수(spatial response distribution function)을 전산모사하여, 기존 문헌의 결과와 일치함을 확인하였다. In order to improve the calculation speed of an integrating-sphere simulator based on a ray-tracing method, parallel processing with OpenMP directive was implemented into the simulator and the randomness of Monte Carlo method was guaranteed by utilizing a parallel random number generator. It was confirmed that simulation results obtained with more than $10^7$ rays showed good agreement with theoretical results within the error range of 0.5%, and that the calculation speed improved as the number of threads increased. Finally, the spatial response distribution functions of a real integrating sphere were simulated and compared with previous results.

일본의 방위산업 어제와 오늘

김승용,Kim, Seung-Yong 한국방위산업진흥회 1991 國防과 技術 Vol.- No.150

조갑 진균증의 원인균 및 배양법에 관한 고찰

김승용,정병수,최규철 ( Seung Yong Kim,Byoung Soo Chung,Kyu Cherl Choi ) 대한피부과학회 1991 대한피부과학회지 Vol.29 No.1

This mycological and cultural investigation was made in 86 cases of onychomycosis diagnosed on positive KOH wet mount at Chosun University Hospital from October, 1989 to February, 1990. The results were as follows : l. The ratio of male to female was 1.2:1. According to Zaiass classificat.ion, distal subungual onychomycosis (DSO) was the most predominant type(79 cases) and others, in decreasing frequency, were superficial white onychomycosis (SWO) (Fcases), total dyst,rophic onychomycosis (TDO) (1 cases, and proximal subungual onychomycosis (PSO) was not. found. 2. In DSO, isolat,ed fungi were T. mentagrophyte(31 cases), i'. rubrum(23 c<ses), saprophyt.es(7 cases) and C albicans (5 cases). In SWO, 2 species were isolated, which were T. mentagraphytes (5 cases) and saprophyte (1 case). C. albicans was cultured in one case of TDO. 3. Eight cases of iisolat,ed sapr ophytes were Aspergillus ( 5 cases), Scopulariopsis (1 case), Hormodendrum(1 case), and Cepalosporium(1 case). Saprophytes were tound only in toe nails. 4. Uo saprophytes were isolated from coexisting skin lesi.ons. Among 10 cases of coexisting tinea manus and/or tinea corporis, T. rubrum were cultured in 8 cases. 5. The positive rate of culture by two different sampling methods and media was as follows : On Sabouraud glucose agar media, it was 47.7% (41 cases) by clipping methodand 40.7% (35 Cases) by file-method. On dermatophyte test medium, it was 43.0 (3'7 eases) by cliipping method and 45.3% (39 cases) by file-method. It seem that the selection of sampling site is important in increasing the positive rate in culture of onychomyc.osis. (Kor J Dermatol 29(1): 50 55, 1991)

AlN 기판을 이용한 RF 고전력 증폭기 모듈

김승용,남충모,Kim, Seung-Yong,Nam, Choong-Mo 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.10

In this paper, a high power RF amplifier module using AlN substrate of high thermal conductivity has been proposed. This RF amplifier module has the advantage of compact size and effective heat dissipation for the packaging of high power chip. To fabricate the thru-hole and scribing line on AlN substrate, the key parameters of $CO_2$ laser were experimented. And then, microstrip lines and spiral planar inductors were fabricated on an AlN substrate using the thin-film process. The fabricated microstrip lines on the AlN substrate has an attenuation value of 0.1 dB/mm up to 10 GHz. The fabricated spiral planar inductor has a high quality factor, a maximum of about 62 at 1 GHz for a 5.65 nH inductor. Packaging of a RF power amplifier was implemented on an AlN substrate with thru-hole. From the measured results, the gain is 24 dB from 13 to 15 GHz and the output power is 33.65 dBm(2.3 W).

체육수업에서 기본심리욕구와 결과기대, 자기효능감 및 과제지속의 구조적 관계

김승용(Kim, Seung-Yong) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.3

The aim of this study is to inquire into the structural relations between students’ basic psychological needs, outcome expectation, self-efficacy and task persistence in physical education class. To achieve such a research objective, this study selected a total of 354 copies of questionnaires as final valid samples targeting students in the middle school located at a metropolitan are using the convenience sampling method. For data processing, this study did the hypothesis test after confirming the goodness of fit test of all models using SPSS 18.0 and AMOS 18.0; the results are as follows: First, it was confirmed that capability and relationship among students’ three sorts of basic psychological needs had a significant influence on outcome expectation and self-efficacy. Second, the only relationship of students’ basic psychological needs was found to have a significant influence on task persistence. Third, the results showed that outcome expectation had a positive influence on self-efficacy, but had not a significant influence on task persistence while self-efficacy was confirmed to have a significant influence on task persistence. Lastly, in the relations between the relationship factor of basic psychological needs and self-efficacy, outcome expectation was found to play a role as a medium while self-efficacy was also found to play a role as a medium in the relations between capability, autonomy and also task persistence.

기업 보안을 위한 CCTV 비할당 영역 분석용 디지털 포렌식 솔루션 개발

김승용(Seung-yong Kim),김상욱(Sang-Wook Kim),황인철(In-Cheol Hwang) 한국인터넷전자상거래학회 2016 인터넷전자상거래연구 Vol.16 No.4

As information technology develops rapidly, various kinds of information generated in companies play an important role in securing and keeping competitiveness. In fact, many companies are using various kinds of information security technology in order to prevent information leak, especially CCTV is popular as a physical security. But there is some risk of demage in entire or partial images by intentional initialization, deletion, forgery or un-intentional physical media damage, fire, flood. Especially, it is important to extract and analyze image data in non-allocation area which saves image data when you can not watch them by DVR(Digital Video Recorder). The purpose of this study was to develop algorithm to restore necessary image data by the analysis of DVR file system of hard disk, and by the index restoration, when you have some problems in image data of DVR hard disk due to user’s mistake or intentional damage(deletion or initialization), or DVR device trouble. Especially it was focused on extract and analyze image data in the non-allocation area which saves image data when it is impossible to obtain image data by DVR device.

연구개발 투자와 경영성과 간의 관련성에 대한 연구

김승용(Kim, Seung-Yong),신사순(Shin, Sa-Soon) 조선대학교 지식경영연구원 2001 기업과 혁신연구 Vol.24 No.1

개인의 연기(緣起)적 성향이 IT 기업 구성원의 태도 및 성과에 미치는 영향에 관한 연구

김승용(Seung-Yong Kim) 한국무역연구원 2017 무역연구 Vol.13 No.1

Based on both Buddhist philosophy and general system theory, mutual causality disposition (MCD) was proposed as an alternative construct that can be utilized to explain and predict important organizational effectiveness, such as employee attitudes and performance. The primary purpose of this study is to examine the effect of MCD on the attitudes and performance of people working for an IT company in order to check if MCD does actually work as suggested. In this study, MCD was hypothesized to be affected by two personality traits (i.e., conscientiousness and extraversion) and has a positive effect on two attitude variables (i.e., job satisfaction and organization commitment) and three performance domains (i.e., job dedication, interpersonal facilitation, and task performance). It was also hypothesized that the effect of the personality traits on the attitudes and performance domains would be mediated by MCD. Analyses of the dataset collected from 223 IT engineers showed evidence supporting all the hypotheses except the relationship between MCD and task performance. The effect of conscientiousness on job satisfaction and job dedication was mediated by MCD-Action and MCD-communication, while that of extraversion on interpersonal facilitation and organization commitment was mediated by MCD-Relationship. Some implications of the findings and suggestions for future research were discussed.

제조원가와 기간비용 원가행태 비교 연구

김승용(Kim, Seung Yong),마승수(Ma, Seung Soo) 한국국제회계학회 2014 국제회계연구 Vol.0 No.53

본 연구는 제조원가(인건비, 감가상각비)와 기간비용(인건비, 감가상각비) 간의 원가고착 비교를 위한 연구이다. 본 연구에서는 Anderson의 기본모형과 확장모형 및 Banker의 ANOVA 모형을 통해 1982년부터 2003년까지 인건비와 감가상각비를 중심으로 제조원가와 기간비용 및 매출원가의 원가고착 수준을 비교하였다. 본 연구 결과에 따르면, 판매및관리 부문 인건비와 감가상각비 및 매출원가에서는 일관되게 원가고착 현상이 나타났지만, 제조부문의 인건비와 감가상각비에서는 원가고착 현상이 나타나지 않았다. 이는 우리나라 제조업체의 경우, 조업도가 감소할 경우, 조정비용을 회피하기 위해 판매와 일반관리 부문의 잉여자원을 조업도 감소비율 만큼 곧바로 처분하지 않고 매출액이 회복될 때까지 보유하려는 경향을 갖고 있는 것으로 해석할 수 있다. 그러나 제조부문 인력 및 유형자산에서는 원가의 하방경직성에 대한 통계적 유의성이 낮거나 없는 것으로 나타났다. 또한 그 부호와 계수값들은 오히려 제조부문 원가가 하방탄력적일 수 있음을 암시하고 있다. 이는 조업도 감축시 판매및관리 부문 자원에 비해 제조부문 잉여자원은 보다 신속히 감축함으로써, 잉여자원 보유비용을 줄이려는 경향으로 해석할 수 있다. 이상의 결과를 종합하면 우리나라의 경우 판매와 일반관리 활동보다는 제조활동 부문에서 보다 유연하게 생산자원을 운용하고 있다는 것으로 해석할 수 있다. This study investigates whether cost stickiness occurs in manufacturing parts and selling, general, and administrative parts using a sample of Korean firms during the period from 1982 to 2003. We compare the behaviour of cost of goods sold, labour costs and depreciation costs between manufacturing activities and selling, general, and administrative activities associated with the change of sales activity through ABJ Basic and Extensive Models and Banker ANOVA Model. We review cost stickiness theory, the results and the meaning of those studies. Our findings show that cost stickiness occurs in labour cost and depreciation cost for selling, general, and administrative activities, but not in labour cost and depreciation cost for manufacturing activities. These result show that management whose sales revenue falls holds the surplus resources to avoid the adjustment costs in the future when sales are restored. Although the labour and depreciation costs for manufacturing activities are not statistically significant, the sign and the magnitude of the coefficient suggest that the Korean firms probably dispose the surplus resources for manufacturing activities more rapidly than that of selling, general, and administrative activities when sales falls, considering the non-stickiness of these costs for manufacturing activities.

머신러닝을 적용한 진공펌프 상태진단 연구

김승용(Seung Yong Kim),문엄배(Eombae Moon),우상욱(Sang-wook Woo),김종윤(Jong-yun Kim) 대한전기학회 2020 정보 및 제어 심포지엄 논문집 Vol.2020 No.10