• 한국도서관정보학회지
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• 제43권2호
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• pp.99-116
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• 2012

이 연구는 국가적 차원에서 외국학술지의 효율적 이용을 위해 설립된 외국학술지지원센터들의 운영전반과 성과를 평가하기 위한 평가지표를 개발하기 위해 시도된 것이다. 이를 위해 이 연구에서는 평가지표를 운영전략과 운영시스템, 운영성과의 세 부문으로 나누고, 이를 다시 8개 세부부문, 16개 지표, 35개 세부지표로 구분하여 제시하였다. 각각의 지표는 AHP 전문가설문조사 결과 도출된 가중치로 배점을 결정하였으며, 최종점수는 운영전략부문 190점, 운영시스템부문 440점, 운영성과부문 370점, 총 1,000점 만점으로 구성하였다. 개발된 평가지표를 바탕으로 평가지표정의서를 개발하였으며, 이 정의서를 기반으로 시범평가와 자체평가를 실시하여, 차후의 실제평가에서 나타날 수 있는 문제점들을 검토하도록 하였다.

• 한국컴퓨터정보학회논문지
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• 제26권11호
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• pp.149-156
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• 2021

추천 시스템의 여러 구현 기법들 중 협력 필터링은 과거 평가 이력을 토대로 유사성이 높은 인접 이웃들을 선정하여, 그들이 선호했던 상품들을 추천하는데, 많은 상업 사이트에서 성공적으로 활용되고 있다. 유사도의 정확한 측정은 시스템의 성능을 좌우하는 매우 중요한 요소이다. 기존에 다양한 방식의 유사도 척도들이 개발되었는데, 대개 전통적인 유사도 척도와 기개발된 여러 계수들과의 통합 방식이었다. 본 연구에서는 새로운 방식의 유사도 척도를 제안한다. 두 사용자 간의 공통 평가 영역을 평가치 크기에 따라 분할하여 각 부분 영역별로 유사도를 측정하고 이들을 가중 통합함으로써, 유사한 영역이 구체적으로 파악되어 최종 유사도값에 반영된다. 두 종류의 개방형 데이터셋을 활용한 성능을 측정하였고, 그 결과 특히 밀집 데이터셋에서 제안 방법의 예측 정확도, 순위 정확도, 평균 정밀도 성능이 기존보다 우수하였다. 제안 척도는 다양한 상업 시스템에서 사용자들의 선호에 보다 적합한 상품을 추천하는데 유용하게 활용될 것으로 기대한다.

• 한국대기환경학회지
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• 제23권4호
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• pp.449-456
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• 2007

Dispersion coefficient preprocessing schemes have been examined to improve plume dispersion model performance in complex coastal areas. The performances of various schemes for constructing the sigma correction order were evaluated through estimations of statistical measures, such as bias, gross error, R, FB, NMSE, within FAC2, MG, VG, IOA, UAPC and MRE. This was undertaken for the results of dispersion modeling, which applied each scheme. Environmental factors such as sampling time, surface roughness, plume rising, plume height and terrain rolling were considered in this study. Gaussian plume dispersion model was used to calculate 1 hr $SO_2$ concentration 4 km downwind from a power plant in Boryeung coastal area. Here, measured data for January to December of 2002 were obtained so that modelling results could be compared. To compare the performances between various schemes, integrated scores of statistical measures were obtained by giving weights for each measure and then summing each score. This was done because each statistical measure has its own function and criteria; as a result, no measure can be taken as a sole index indicative of the performance level for each modeling scheme. The best preprocessing scheme was discerned using the step-wise method. The most significant factor influencing the magnitude of real dispersion coefficients appeared to be sampling time. A second significant factor appeared to be surface roughness, with the rolling terrain being the least significant for elevated sources in a gently rolling terrain. The best sequence of correcting the sigma from P-G scheme was found to be the combination of (1) sampling time, (2) surface roughness, (3) plume rising, (4) plume height, and (5) terrain rolling.

• 한국정보시스템학회지:정보시스템연구
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• 제31권1호
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• pp.239-269
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• 2022

Purpose This paper attempts to identify items for improving the usage of PLM(Product Lifecycle Management) systems and suggests ways to prioritize improvement items on the basis of importance. It also tries to find out differences in the importance of improvement items due to the company size, the industry, the job, or the PLM solution. Design/methodology/approach Through a survey from participants to a PLM System Conference, data were collected from a sample of 181 users who had the previous experience in using a PLM system. In order to figure out the differences in the importance among user groups, the F-test with the Scheffe test as a post-hoc analysis was used in case of equal variances and the Welch test with the Dunnett T3 test was used in case of unequal variances. Findings This study sorted out 25 improvement ideas according to their importance assessed by the PLM system users. The top five ideas are improving data consistency, error minimization, fast system response time, enhancing user recognition, and business process improvement. The support group puts higher importance than the general user group in data consistency, fast system response time, enhancing user recognition, business process improvement, dedicated team for data consistency, continuous support from management, hardware performance upgrade, output linkage to other systems, and shortening problem solving duration. The largest company group attaches significantly higher weights than the smallest company group to data consistency, error minimization, fast system response time, business process improvement, dedicated team for data consistency, security with proper access management, output linkage to other systems, and better user interface.

• 한국항만경제학회지
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• 제39권3호
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• pp.179-189
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• 2023

우리나라의 현행 항만개발제도는 장래 항만물동량을 기준으로 항만시설의 완공 시기와 규모를 조정한다. 물동량 연동 항만개발제도라 불리는 현행 항만개발제도는 효율적으로 한정된 예산을 집행했다는 긍정적인 평가를 받았다. 그러나 최근 국내 항만시설의 노후화가 가속화 되면서 국내 항만시설의 서비스 수준저하에 대한 우려가 커지고 있다. 하지만 현재 우리나라 항만개발제도에는 서비스 수준을 평가하고 개발 결정지표로 활용할 수 있는 기준이 마련되어 있지 않다. 이에 본 논문의 목적은 항만의 서비스 수준을 측정하기 위한 지표를 선택하고 지표 간 가중치를 도출하여 현재의 '물동량 연동 항만개발제도'과 연계될 수 있는 항만서비스 지수(PSI)를 개발하는 것이다. 다양한 선행연구 분석 결과를 바탕으로 선박 대기율, 선석 생산성, 선박 재항 시간, 선박 생산성을 항만 서비스 지수를 구성하는 4가지 지표로 선정하였다. AHP 및 엔트로피 방법론을 통해 도출된 네 개 지표의 가중치를 종합하여 적용하였으며 항만서비스 지수(PSI) 산식을 도출하고, 이를 바탕으로 국내 컨테이너 및 벌크터미널의 서비스 수준을 평가하였다. 다음으로 본 논문에서는 측정 결과를 6개 등급으로 범주화 하여 각 등급의 서비스 수준을 정의하였다. 마지막으로 물동량이라는 정량적 지표와 "서비스" 수준이라는 정성적 지표를 연계시킬 수 있는 항만개발제도의 개선 방안을 도출하여 제시하였다.

• Journal of Sport and Applied Science
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• 제8권2호
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• pp.13-18
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• 2024

Purpose: The purpose of this study is to determine the effects of a 6-week weight training and complex training program on the Y-balance test (YBT) in high school soccer players. Research design, data, and methodology: This study included 26 high school soccer players from City S. Subjects were divided into a weight training group (WTG: n=13) and a complex training group (CTG: n=13) based on their willingness to participate without medical problems. The YBT measured anterior (AT), posteromedial (PM), posterolateral (PL), and composite scores (CS), and was measured twice: before the start and after the end of training. The data were analyzed using the SPSS 25.0 statistical program to compare pre- and post-training using paired-t tests, between training groups using independent-t tests, and left-right comparisons using independent-t tests. Results: Training resulted in a significant pre- to post-training change in PL in the left foot WTG group (p<.05), with no significant change in the other measures. There were no significant differences between training groups and between left and right sides. Conclusion: To improve YBT in high school soccer players, a program to improve ankle and hip mobility and strength should be added along with improving large muscle strength through weights and comflex training.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2008년도 춘계학술대회논문집
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• pp.393-396
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• 2008

Propellant consumption control for space launch vehicle can be achieved by propellant utilization system (PUS) and tank depletion system (TDS). In the course of developing new space launch vehicles, the main target of design is on reducing of space launch vehicle weight, which results in increasing both specific impulse and payload weight. The weights of space launch vehicles are generally allocated to structure, propulsion system, and propellants loaded. The quantity of propellants filled in propellant tanks may be estimated with the propellants actually consumed by propulsion system to complete its mission and the propellants left on-board at the time of engine shut-off. To minimize the remaining quantity of propellants on-board the supplying propellants' O/F ratio should be controlled from the certain time before engine shutdown. To control an O/F ratio, a control system, which accurately measures and compares the remainder of propellants in tanks and pipes, should be needed. This paper solely dedicates its contents to explore the merits and demerits of various level sensor, which is one of the important elements for PUS and TDS, and the transmission and control of signals within space launch vehicle.

• 한국정보통신학회논문지
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• 제18권11호
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• pp.2628-2633
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• 2014

BIPM에서는 세계협정시(UTC)를 유지하기 위해 GPS 시각 전송 기법을 이용해 왔다. 최근 GLONASS 위성 시스템이 전 세계적으로 서비스되면서 GLONASS 위성의 코드 신호를 이용한 시각 전송 기법에 대한 연구가 진행되었고 이에 GPS 와 GLONASS를 결합한 시각 전송 기법이 연구되고 있다. 본 논문에서는 GNSS 시간과 UTC, 윤초 등에 대해 소개하고 GLONASS 시각 전송에서 윤초의 적용 여부에 따른 시각 오프셋 영향에 대한 결과를 제시하고자 한다.

• 한국식품위생안전성학회지
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• 제7권2호
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• pp.133-145
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• 1992

The sanitation inspection is the most frequently used procedure to protect foods prepared in foodservice establishments. In order to enhance foodservice inspections and to improve post-inspection remedial measures, more practical evaluation methods for sanitation are required. The HACCP approach is based upon factors which contribute to foodborne disease rather than of factors which relate to aesthetics. Contributing factors for foodborne diseases from food service establishments reported in USA, Candada, and England were analyzed to identify potential hazards during practical foodservice operations. Hazards were classified at critical control points by risk ranking, Twenty-two observable practical indicators relating to each contributing factor were selected and adjusted to standardized procedures and hazard determiners at critical control points, The weights for each inspection item were ranked as 1, 2, 3, 4, or 5 according to the risk level of contributing factors. And also application for the inspection item in different 6 types of work procedures were suggested for the use of specialized foodservice establishment and cafeteria, and of manager's self inspection in each establishment.

• 한국식품위생안전성학회:학술대회논문집
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• 한국식품위생안전성학회 1992년도 학술강연회
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• pp.33-45
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• 1992

The sanitation inspection is the most frequently used procedure to protect foods prepared in foodservice establishments. In order to enhance foodservioe inspections and to improve post-inspection remedial measures, more practical evaluation methods for sanitation are required. The HACCP approach is based upon factors which contribute to foodborne disease rather than on factors which relate to aesthetics. Contributing factors for foodborne disease from foodservice establishments reported in USA, Canada, and England were analyzed to identify potential hazards during practical foodservioe operations. Hazards were classified at critical control points by risk ranking. Twenty-two observable practical indicators relating to each contributing factor were selected and adjusted to standardized procedures and hazard determiners at critical contral points. The weights for each inspection item were ranked as 1, 2, 3, 4 or 5 according to the risk level of contributing factors. And also application for the inspection item in different 6 types of work procedures was suggested for the use of specialized foodservice establishment and cafeteria, and of manager's self inspection in each establishment.