• Journal of Biosystems Engineering
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• 제36권6호
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• pp.422-433
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• 2011

Market demand for hydro-mechanical transmission (HMT) for agricultural tractors has increased recently. To select a type of HMT satisfying design conditions, performance characteristics of 12 HMT types must be understood. This study was conducted to provide tractor engineers with a guideline to select the most appropriate HMT type for their design requirements. Characteristics on speed reduction ratio, power transmission efficiency, power regeneration, lock-up angular velocity, output torque ratio and torque ratio of planetary gear train axis of the 12 HMT types were investigated and presented as either formula or graphical forms. A guideline to select proper HMT type was also presented using 2 parameter: lock-up angular velocity (${\omega}_L$) and torque ratio of the planetary gear train axis. In addition, effect of gear ratio of the planetary gear train on the power transmission efficiency was investigated and a guideline to select the best gear ratio was also presented.

• 한국수산과학회지
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• 제44권4호
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• pp.390-396
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• 2011

Southern rough shrimp Trachysalambria curvirostris is exploited mainly by small shrimp beam trawl in coastal regions of Korea. To determine the size selectivity of a shrimp beam trawl for this species, a series of comparative fishing experiments was conducted in the sea adjacent to Geoje Island off the southern cost of Korea in June and November, 2010, using codends with four different mesh sizes(14.2, 17.8, 25.5, and 35.3 mm). The extended Share Each Length's Catch Total(SELECT) analysis method, based on a multinomial distribution, was applied to the fishing data to obtain a master selection curve. The model with the estimated split parameters fit the catch data best. The master selection curve was estimated to be: s(R)=exp(15.183R-7.872)/[1+exp(15.183R-7.872)], where the relative carapace length, R, is the ratio of carapace length to mesh size. The relative carapace length for 50% retention was 0.518, and the selection range was 0.145. The results suggest that codends with a larger mesh size allow more small-sized shrimps to escape.

• 한국생산제조학회지
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• 제19권4호
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• pp.521-528
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• 2010

A product system will be improved continually until requirements are satisfied. It is true that considering alternative designs to improve product system is hard work; it is also true that selecting an adequate design idea that represents the needs of stakeholders concerned and meets effectiveness factors properly is not an easy work, either. In the process of driv-ing an idea and designing, which is called Design Phase, there are lots of existing tools for testing the driven idea in DFSS. But, those kinds of tools do not offer the function that helps to select the technically better design idea among alternative design ideas that have the same evaluation level. Moreover it is inappropriate to select adequate alternative design ideas by just verifying only the evaluation table in pugh matrix, since satisfied deviation val-ues are low when there is a too competitive mass product system in a market. Also, for the IT product with short life cycle, faster and more effective testing tool is needed. Therefore, the 'roduct quality index' is suggested in order to select an appropriate candidate design concept for system development that meets requirements by using 'deality concept' pro-vided by TRIZ. According to the result of this research, it is possible to select technically better idea fast and effectively; it is confirmed by applying the approach to the case of LCD BLU (Back Light Unit).

• 대한전자공학회논문지SD
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• 제39권9호
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• pp.55-61
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• 2002

캐리 선택 가산기에 파이프라인을 적용하면 적은 수의 파이프라인 스테이지를 가지면서 많은 수의 파이프라인 스테이지를 갖는 가산기처럼 높은 주파수 상에서 구동한다. 이 논문에서는 캐리 선택 가산기 구조를 적용한 4 블록 5스테이지 파이프라인 32비트 가산기를 제안하였다. 이 제안된 가산기는 기존의 16스테이지 파이프라인 32비트 가산기와 같이 높은 주파수에서 동작한다. 그럼에도 불구하고 이 제안된 가산기는 기존 16 스테이지 파이프라인 가산기 보다 3배 적은 트랜지스터로 구현 가능하다. 이 가산기는 0.25um CMOS 공정으로 구현할 때 2.5V전압에서 1.67GHz으로 동작한다.

• 한국치위생학회지
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• 제17권5호
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• pp.853-864
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• 2017

Objectives: The purpose of the study was to investigate the influence of employment preparation behavior on motive to select dental hygiene as their major, and their work value among dental hygiene students. Methods: A self-reported questionnaire was completed by 444 dental hygiene students in South Korea from November 1 to 30, 2016. To analyze the data, the study used independent t-test, one way ANOVA, Pearson's correlation analysis, and regression analysis among others. Results: There were employment preparation behavior (2.9), major selection motive (3.1), and their work value (3.8) in subject. The higher student's grade is, the better prepared he or she for employment (p<0.001). Inner work value (p<0.01) and outer work value (p<0.05) were higher among females than males. Employment preparation behavior had significant positive effect on personal, social motive to select dental hygiene as their major, and their inner work value. Conclusions: Positive motivation to employment preparation behavior leads to major motive to select major, and their work value. It is necessary to consider study of diversified manners that can be fulfilled for employment preparation behavior.

• The Journal of Asian Finance, Economics and Business
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• 제9권7호
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• pp.173-183
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• 2022

With over 15,000 Thai restaurants worldwide and 5,342 in the USA alone, Thai cuisine has been repeatedly internationally acclaimed for its taste, flavors, smell, and nutritional values. The Thai Ministry of Commerce has also established a global objective to find and award the best Thai food restaurants using Thai Select Premium (TSP), Thai Select Unique (TSU), and Thai Select brand labels. Therefore, using systematic random sampling, 620 diners were selected from certified Thai Select restaurants (TSR) in either Los Angeles, New York, Miami, or Chicago to ask for their opinions concerning factors important to each restaurant's service loyalty (SL). The four constructs, 18 observed variables, and six hypotheses were analyzed using LISREL 9.1. Results revealed a significant positive effect (88% R²) on the causal factor interrelationships on TSRs' SL. Additionally, the three factors affecting SL the most were service tangibility, taste perceptions, and brand image, with total effect values of 0.94, 0.43, and 0.31, respectively. Finally, when each US diner was asked why they chose to eat Thai food, respondents overwhelmingly indicated that taste (49.50%) and healthiness (32.90%) were most important. The study also adds to the literature by highlighting the importance of Thai cuisine contributing to healthier lifestyles.

• 한국조리학회지
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• 제22권4호
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• pp.353-364
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• 2016

본 연구에서는 일식레스토랑의 소비자들이 메뉴선택시 만족도와 선호도에 어떠한 영향을 미치는지 측정하였다. 설문 조사는 2016년 1월 1일부터 1월 31일까지 시행하였으며, 설문 대상은 부산 및 경남의 일식 레스토랑을 이용한 경험이 있는 소비자들을 대상으로 조사하였다. 첫째, 메뉴품질, 메뉴디자인, 메뉴선택동기가 소비자 선호도 간에 메뉴품질(${\beta}=.444$, p<.001), 메뉴디자인(${\beta}=.425$, p<.001), 메뉴선택동기(${\beta}=.147$, p<.001)로 소비자선호도에 대하여 유의한 정(+)의 영향관계가 있는 것으로 분석되었다. 둘째, 소비자선호도는 소비자만족도에 대하여 유의한 정(+)의 영향관계가 있는 것으로 분석되었다. 셋째, 일식 레스토랑 메뉴선택은 소비자만족도에 메뉴품질(${\beta}=.650$, p<.001), 메뉴디자인(${\beta}=.120$, p<.001), 메뉴선택동기(${\beta}=.263$, p<.001)는 유의한 정(+)의 영향관계가 있는 것으로 분석되었다. 마지막으로 메뉴품질이 소비자만족도에 미치는 영향과 관련하여 부분매개효과가 있는 것으로 나타났고, 메뉴디자인이 소비자만족도에 미치는 영향과 관련하여 부분매개효과가 있는 것으로 나타났으며, 메뉴선택동기는 소비자만족도에 미치는 영향과 관련하여 부분매개효과가 있는 것으로 나타났다.

• 한국콘텐츠학회논문지
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• 제18권3호
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• pp.11-18
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• 2018

몰입 가상현실 환경에서 가상 객체들을 선택하고 조작하기 위해서는 사용자가 원하는 가상 객체를 빠르고 정확하게 선택할 수 있어야 한다. 가상현실에서 객체 선택을 위한 가장 알려진 접근 방법은 Ray-casting 방법이다. Ray-casting은 가상현실 환경에서 사용자의 손이나 시야 방향에서 직선으로 이동하는 가상의 선을 발사하고, 이 가상의 선이 발사되는 과정에서 충돌되는 가상 객체를 사용자가 선택할 수 있게 해주는 방법이다. 하지만, 가상 객체들이 겹쳐져 있는 상황에서는 사용자가 원하는 객체가 아닌 다른 객체들이 선택 될 수 있는 모호성 문제가 발생하게 된다. 이러한 방법을 해결하기 위해서 본 논문에서는 겹쳐진 가상 객체들 중 사용자가 원하는 객체를 선택하고자 하는 경우, 사용자가 겹쳐진 객체들의 그룹을 먼저 선택하게 한 후에 이 겹쳐진 객체들이 가지고 있는 기하학적인 연관관계를 계산하고 이를 사용자의 시점에서 겹쳐지지 않게 펼쳐서 시각화를 하는 Explosion-casting 방법을 제안한다. 제안한 방법의 평가를 위해서 기존의 Ray-casting 방법과 비교를 하였을 때, 겹쳐져 있는 가상 객체를 선택할 때 걸리는 속도와 정확도가 증가하는 결과를 보여주었다.

• 혜화의학회지
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• 제24권1호
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• pp.1-14
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• 2015

Objectives : The purpose of this study is to examine senior citizens' perception of medical welfare service in Daejeon, and to investigate the level of Korean Medicine University students' satisfaction about medical services that they have done. Methods : We visited Daejeon city hall and Dae jeon Seo-gu community health center, and interviewed them. After that we select two population and did two different surveys. First, to investigate the current state of medical services and medical welfare in Daejeon, we select neglected class senior citizens who were serviced at social welfare center. Second, we select Daejeon Korean Medicine University student to investigate the level of satisfaction about medical services and pre-education. In first population, we random select 25 of 34 senior citizen who visits mere social welfare center. In second population, we random select 78 of 115 Korean Medicine University student who belongs to medical welfare club. Results : We found some advantages and problems in medical services. A lot of senior citizen who were serviced at social welfare center showed high level of satisfaction about medical service. But there were few citizens who knows about health & medical welfare. And most Korean Medicine University student who services medical service to neglected class senior citizens showed high level of satisfaction. Conclusion : We concluded that medical welfare for senior citizen needs more publicizing. Because result of our survey, many senior citizens showed not only low level of recognition in medical welfare service, also showed low utilization rate in public health center. And most Korean Medicine University students were satisfied with themselves about medical service that they have done, it seemed medical service gives beneficial influence to not only senior citizen but also Korean Medicine University student.

• 디지털산업정보학회논문지
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• 제10권2호
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• pp.203-211
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• 2014

In recent highly competitive business environment, collaboration has become one of the important business strategies for companies to survive and/or prosper. There are many different types of collaboration strategies, and it is crucial for companies to select the right ones according to the types of collaboration they require. To select the right type of collaboration options for business, in the past research, there have been two important criteria to classify collaboration types, namely governance (who makes key decisions - one kingpin participant or all players?) and membership (can anyone participate, or just select players?). In this research, we add a new classification criterion, recognition of collaboration purpose, which means whether collaborators know or do not know the purpose of collaboration in advance. Recently, we see many cases in which social media data are used in many unknown purposes a priori. In this research, we add such cases to develop new classification model.