• 제목/요약/키워드: gap analysis

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드리프터 유압 해석모델을 활용한 성능격차 유발 인자 접근 사례 (Analysis of Drifter's Critical Performance Factors Using Its Hydraulic Analysis Model)

  • 노대경;서자호;박진선;박승현;장주섭
    • 한국시뮬레이션학회논문지
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    • 제23권3호
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    • pp.33-40
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    • 2014
  • 드리프터는 국산화개발에 어려움을 겪고 있는 장비이며, 외국선진사의 제품을 데드카피 하여도 시제품의 성능이 뒤떨어지는 현상이 발생하여 왔다. 본 논문은 천공기의 핵심부품인 드리프터의 해석모델을 활용하여 성능격차를 유발하는 요소를 분석하는 사례를 보여준다. 진행절차는 다음과 같다. 우선, 타격시험을 수행하여 해석모델의 신뢰성을 확보한다. 그리고 해석모델을 활용하여 외국선진사 제품과 시제품의 성능비교그래프를 도출한다. 마지막으로 해석모델의 변수를 분석하여 성능격차를 유발하는 인자에 접근한다. 사용된 소프트웨어는 독일 ITI사에서 개발된 SimulationX이다.

쉴드 TBM 터널 굴착시 지표침하에 관한 신뢰성해석 (Reliability analysis of surface settlement during shield TBM tunneling)

  • 한명식;조국환
    • 한국터널지하공간학회 논문집
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    • 제18권3호
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    • pp.305-318
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    • 2016
  • 본 연구에서는 ${\bigcirc}{\bigcirc}$국제공항 제2여객터미널 연결 철도 건설공사 기본설계 중 쉴드 TBM 터널 굴착 시 Gap parameter와 관련된 지반물성치의 불확실성을 평가하고, 지표침하에 대한 신뢰성해석을 수행함으로써 쉴드 TBM 설계의 적절성을 평가하고자 한다. 또한 Gap parameter에 이용되는 설계정수의 신뢰도지수 및 파괴확률에 대한 민감도를 분석함으로써, 지표침하에 큰 영향을 미치는 설계정수를 평가함으로써 최적의 설계를 수행하는데 기초 자료를 제공하고자 하였다.

Students' Perceptions and Expectation Gap on the Skills and Knowledge of Accounting Graduates

  • ARYANTI, Cornelia;ADHARIANI, Desi
    • The Journal of Asian Finance, Economics and Business
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    • 제7권9호
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    • pp.649-657
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    • 2020
  • This study aims to describe the perceptions of accounting students and expectations of employers towards the skills and knowledge needed by accounting graduates in Indonesia. Quantitative method using survey is employed to analyze 103 questionnaires from students and 51 questionnaires from employers. The results showed that students' perceived honesty, continuous learning, and work ethics are important skills, while employers stress the importance of work ethics, teamwork, and time management. Knowledge needed by accounting graduates in the perception of students includes financial accounting, financial reporting, and financial statement analysis, whereas employers perceived the importance of financial statement analysis, knowledge of Microsoft Office program, and financial accounting. Further analysis showed that there is an expectation gap between the perceptions of students and the expectations of employers towards skills - not knowledge - needed by accounting graduates. Although investigations of students' perceptions and employers' expectations have been conducted in previous studies, the information should be updated continuously to reflect the current conditions. This study offers the recent perceptions from students and employers to identify the current expectation gap. This study points to the importance of skills development in the university curriculum in order to develop the skillful human resources in accounting and meet the expectations of employers.

유한요소해석을 이용한 알루미나 정전척의 글라스 기판 흡착 특성 연구 (A Study on Attractive Force Characteristics of Glass Substrate Using Alumina Electrostatic Chuck by Finite Element Analysis)

  • 이재영;장경민;민동균;강재규;성기현;김혜동
    • 반도체디스플레이기술학회지
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    • 제19권4호
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    • pp.46-50
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    • 2020
  • In this research, the attractive force of Coulomb type electrostatic chuck(ESC), which consisted of alumina dielectric, on glass substrate was studied by using the finite element analysis. The attractive force is caused by the high electrical resistance which occurs in contact region between glass substrate and dielectric layer. This research tries the simple geometrical modeling of ESC and glass substrate with air gap. The influences of the applied voltage, and air gap are investigated. When alumina dielectric with 1014 Ω·cm, 1.5 kV voltage, and 0.01 mm air gap were applied, electrostatic force in this work reached to 4 gf/㎠. This results show that the modeling of air gap is essential to derive the attractive force of the ESC.

우천시 비보호좌회전에서의 간격수락 행태모형 개발 (Development of Gap Acceptance Models for Permitted Left Turn Intersections during Rainfall)

  • 황순천;이청원;이동민
    • 한국도로학회논문집
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    • 제19권4호
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    • pp.61-68
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    • 2017
  • PURPOSES : A complete signal system is not always the best solution for improving traffic operation efficiency at intersections. An alternative solution is to use a Protected Permitted Left Turn (PPLT) operation method. However, the PPLT method needs to be developed after a detailed study of driving tendencies, most notably the gap acceptance behavior, for successful implementation. In this study, the gap acceptance behavior was investigated under various variables and weather conditions, especially under rain, and the results were compared to the case of normal weather. The results of this study will be helpful in introducing the PPLT method, and are important considering the tendency of attempting unprotected left turns that is extremely common in Korean drivers. METHODS : Data was obtained by analyzing traffic footage at four intersections on a day when the precipitation was greater than 5 mm/h. The collected data was classified into seven variables for statistical analysis. Finally, we used logistic regression analysis to develop a probability distribution model. RESULTS : Gap, traffic volume, and the number of conflicting lanes were factors affecting the gap acceptance behavior of unprotected left turns under rainy conditions. CONCLUSIONS : The probability of attempting unprotected left turns is higher for larger gaps. On the other hand, the probability of attempting unprotected left turns decreases with an increase in the traffic volume. Finally, an increase in the number of conflict lanes leads to a decrease in the probability of attempting unprotected left turns.

A Study of General Reducing Criteria of Customer -Oriented Perceived Gap for Hotel Service Quality

  • Chen, Ching-Piao;Deng, Wei-Jaw;Chung, Yi-Chan;Tsai, Chih-Hung
    • International Journal of Quality Innovation
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    • 제9권1호
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    • pp.113-133
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    • 2008
  • In recent years, speedy development of Taiwan's hotel industry intensifies market competition, customers' demands on hotel services quality also increase with the increase of their consumption consciousness, and their demands on hotel types diversify, therefore hotel industry should concern on their unique management services quality brought by their different hotel types. The current designed service system or service transmission process may fail to meet customers' demands owing to emphasizing degree gap in service quality. What is worse, it is difficult for hotel industry to actualize complete customer segregation and to provide customized services, therefore comprehensive understanding of customers' demands on the service quality of different types hotels would contribute to operating management improvement of Taiwan hotel industry. This paper divides Taiwan hotels into three types: international tourism commercial type, holiday type and motel, the general hotels. It studies the emphasize degree gap in service quality between the industry and the customers. Data analysis shows that service quality gap (perceived gap) of hotels of different types exists in several quality aspects; what's more, the perceived gaps, service quality aspects, and its items of different types of hotel are also different. After an integrated analysis, this paper puts forward a general and customer-oriented quality item suitable for hotel industry to shorten the perceived gap of service quality, so that the hotel industry could design a service system and service transfer system, which could meet most lodging customers' demands in the context of pluralized customer sources.

위성 DMB에서 지상중계기 출력에 의한 인접 채널 간섭 분석 (Analysis of the Adjacent Channel Interference from High Power Gap-filler in Satellite Digital Multimedia Broadcasting (DMB))

  • 최보근;이영진;홍영진;서종수
    • 방송공학회논문지
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    • 제10권3호
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    • pp.372-382
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    • 2005
  • 위성 디지털 멀티미디어 방송 (DMB : Digital Multimedia Broadcasting) 시스템은 효율적인 서비스 제공을 위해 위성과 지상중계기(Gap-filler)를 이용하여 서비스를 제공한다. 이때 지상중계기의 고출력 송출 신호는 위성으로부터 상대적으로 낮은 전력으로 수신되는 인접대역 서비스에 큰 간섭을 준다. 또한, 낮은 출력의 지상중계기를 사용할 경우 서비스 커버리지가 작아져 효율적인 지상중계기 운영을 할 수 없다. 본 논문에서는 링크버짓 분석을 통해, 인접대역에서 서비스 되는 지상중계기와 위성과 의 간섭을 최소화하며, 지상 중계기의 서비스 반경을 최대화 할 수 있는 지상중계기의 송신전력(EIRP) 13dBW를 산출하였다.

대학 급식소의 성공적인 운영을 위한 필수관리요소 평가 : 서브퀄모델을 활용한 서비스품질관리 활동 평가 (Assessment of Main Management Components for Successful University Foodservice Operations By Using SERVQUAL Model)

  • 곽동경;장혜자
    • 대한영양사협회학술지
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    • 제3권2호
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    • pp.123-140
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    • 1997
  • The purpose of this study were to assess main management components that can lead to successful university foodservice operations. Specifically, it was intended to develop the tool which assesses the service quality, management, to assess the difference between customer importance from and perceptions of service quality, to compare management perceptions of customer importances with actual service delivery, and to identify internal problems which affect service quality with the use of gap model. Three types of questionnaires were developed and implemented for customers, foodservice personals and foodservice manager. Assessment tools were developed based on the literature review, SERVQUAL, GAP model, and the pilot study. Through the validity and reliability test, the questionnaires were revised. Questionnaires were distributed to 900 university students, 207 foodservice personnels, and 54 foodservice manager respectively. 831 university students, 177 foodservice personnels, and 48 foodservice manager were responded with a response rate of 92.3%, 85.5%, and 88.8% respectively. Statistical data analysis was completed using the SPSS programs for descriptive analysis, ANOVA. and SNK test. The results of this study can be summarized as follows : 1. In quality service management components, 31 quality service attributes were categorized and named into primary quality, secondary quality, hygiene, empathy, tangibles, reliability, responsiveness, and price by the factor analysis. 2. Importance mean score of customers was 4.02 out of 5, but perception mean score of customers was 2.55. So there was a relative big gap(1.47) between importance and perception scores, especially in three dimensions of responsiveness, primary quality, and hygiene. 3. It showed that customers' mean scores of perceived service quality by dimensions were the following order : price > reliability > secondary quality > hygiene > tangibles > primary quality > responsiveness > empathy. And the perception mean score of rented(2.59) or contracted(2.58) management was significantly higher than that of self-operated(2.48). 4. Customers' importances mean score which internal customers recognize was 4.23 out of 5, but service delivery mean score was 3.85. So there was a little gap(0.39) between management perceptions of customer importances and actual service delivery. 5. In gap model, SERVQUAL score showed -1.47, Gap 1 positive 0.15, gap 2 negative 0.61, and gap 3 was positive 0.19. 6. The internal problems were as follows : (1) The managers of University foodservice perceived well enough the customers' expectation value but their management competency was lacked in terms of responding customer needs, (2) The foodservice staff perceived service performance more highly than service quality specifications.

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Representing Topic-Comment Structures in Chinese

  • Pan, Haihua;Hu, Jianhua
    • 한국언어정보학회:학술대회논문집
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    • 한국언어정보학회 2002년도 Language, Information, and Computation Proceedings of The 16th Pacific Asia Conference
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    • pp.382-390
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    • 2002
  • Shi (2000) claims that topics must be related to a syntactic position in the comment, thus denying the existence of dangling topics in Chinese. Under Shi's analysis, the dangling topic sentences in Chinese are not topic-comment but subject-predicate sentences. However, Shi's arguments are not without problems. In this paper we argue that topics in Chinese can be licensed not only by a syntactic gap but also by a semantic gap/variable without syntactic realization. Under our analysis, all the dangling topics discussed in Shi (2000) are, in fact, not subjects but topics licensed by a semantic gap/variable that can turn the relevant comment into an open predicate, thus licensing dangling topics and deriving well-formed topic-comment constructions. Our analysis fares better than Shi's in not only unifying the licensing mechanism of a topic to an open predicate without considering how the open predicate is derived, but also unifying the treatment of normal and dangling topics in Chinese,

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공급자속 측정에 의한 유도전동기의 회전자 진동 검출기법 (A Method for Rotor Vibration Detection of Induction Motor by Air-gap Flux Measurement)

  • 황돈하;한상보;선종호;강동식
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2007년도 춘계학술대회 논문집
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    • pp.379-384
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    • 2007
  • In this paper, a new method for detecting rotor vibrations in a squirrel-cage induction motor is proposed. The air-gap flux variation analysis was done using search coils inserted in stator slots when rotor vibration conditions occurs. An accurate modelling and analysis of air-gap flux variation in the induction motor are developed using finite-element (FE) software packages, and treasuring the flux are made using search coils. In the FE analysis and experiment, the three-phase squirrel-gage induction motor with 380 [V], 7.5 [kW], 4 Poles, 1,768 [rpm] ratings is used. The simulation and experiment results can be useful for detecting rotor vibration of the induction motors.

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