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The Admissibility of Some Nonparametric Tests

  • Li, Seung-Chun
    • Journal of the Korean Statistical Society
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    • v.26 no.2
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    • pp.223-229
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    • 1997
  • It is demonstrated that many standard nonparametric test such as the Mann-Whitney-Wilcoxon test, the Fisher-Yates test, the Savage test and the median test are admissible for a two-sample nonparametric testing problem. The admissibility of the Kruskal-Wallis test is demonstrated for a nonparametric one-way layout testing problem.

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Effects of Brand Familiarity and Coupon Proneness of a Restaurant Chain on Coupon Redemption & Revisit Intention - Based on Undergraduate Student - (외식업체의 브랜드 친숙도와 쿠폰 이용 성향이 쿠폰 상환 및 재방문 의도에 미치는 영향에 관한 연구 - 대학생을 중심으로 -)

  • Lee Young-Nam;Nam Ja-Sook;Jo Sung-Moon
    • Journal of the East Asian Society of Dietary Life
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    • v.16 no.4
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    • pp.481-487
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    • 2006
  • Coupons that restaurants are competitively issuing have considerable effects on company profits, depending on the performance of redemption rate. The purpose of the study is to identify the coupon type that consumers most prefer, among coupon types the most frequently issued restaurants, and to investigate consumers' coupon redemption rate and revisit intention based on brand familiarity. In this study, freshmen and sophomores in the 2-year colleges and the universities located in Seoul and Kyoungi province were sampled by convenience sampling, and surveyed about 3 coupon types (free meal coupon, discount rate coupon, discount price coupon) with 150 copies of questionnaire for each type, totally 450 copies randomly distributed. As a result, relationship between coupon redemption intention and revisit intention based on brand familiarity was that, the higher brand familiarity was, the higher coupon redemption intention and revisit intention were, regardless of coupon types. This study lies in that it approached to discount method, one of the coupon types, by further subdividing into discount rate and discount price, and that redemption intention and revisit intention were studied by taking account of coupon familiarity.

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Quality Characteristics of Sulgidduk Made with Different Amounts of Waxy Millet Flour (차조가루 첨가량을 달리한 설기떡의 품질특성)

  • Chae, Kyung-Yeon;Kwon, Tae-Young;Hong, Jin-Sook
    • Korean journal of food and cookery science
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    • v.25 no.2
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    • pp.127-133
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    • 2009
  • The aim of this study was to determine the optimum amount of waxy millet flour (WMF) to add to rice flour in the preparation of Sulgidduk (waxy millet rice cakes). According to the results, increasing the level of WMF in the formulation caused the moisture contents of samples to increase ($37.14{\sim}38.81%$). The L-value decreased with increasing additions of WMF whereas the b-value increased and the a-value did not differ by the addition of the flour. According to the mechanical evaluation results, hardness increased with increasing amounts of added WMF. Adhesiveness, cohesiveness, gumminess, and brittleness did not differ significantly and springiness was highest at the 30% level of WMF. From the sensory evaluation results, the 30% WMF samples received the highest overall-acceptability scores. In conclusion, according to its sensory and mechanical qualities, the optimal Sulgidduk formulation consisted of 30% WMF added to rice flour.

Relationship Between Small-punch Creep Test Data and Uniaxial Creep Test Data based on the Monkman-Grant Relation (몽크만·그랜트관계에 기초한 소형펀치 크리프시험 데이터와 일축 크리프시험 데이터의 관계)

  • Kim, Bum Joon;Sohn, Ilseon;Lim, Byeong Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.30 no.8
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    • pp.809-814
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    • 2013
  • The relationship between the small-punch creep test and the conventional creep test was investigated experimentally using a method similar to that of the Monkman-Grant relationship. Uniaxial and small-punch creep rupture tests were carried out on 9Cr-2W ferritic steel (Commercial Grade 92 steel: X10CrWMoVNb 9-2) at elevated temperatures. From the relation derived in the same manner as the Monkman-Grant relation, a correlation between the displacement rate in response to the small-punch creep test and the strain rate in the uniaxial creep test was found, and the creep life was calculated using this relation. Furthermore, the failure modes of the small punch creep test specimens were investigated to show that the fracture was caused by creep.

A Study of Electrical Control Kit for Damping Force of Automotive Shock Absorber (자동차 충격흡수장치용 감쇠력 조정 전자제어장치 연구)

  • Sohn, Il-Seon;Lee, Jeong-Goo
    • Transactions of the Korean Society of Automotive Engineers
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    • v.16 no.3
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    • pp.1-6
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    • 2008
  • The performance of shock absorber is directly related to the car behavior and performance, both for handling and comfort. Most of compact car are assembled the passive shock absorber for cost effect but some of compact driver want better performance of shock absorber than standard parts. Therefore, they want the semi-active suspension control system instead of standard damper system. But they only can change the mechanical damping control shock absorber at A/S market. The mechanical damping control shack absorber can not vary the damping force in driving condition so they do not satisfy the mechanical damping control shock absorber system. In this study, electrically damping force controlled shock absorber system is developed based on the mechanical damping force control damper system. This system can vary damping force by switch on dashboard in driving condition. And, this system can satisfy the requirement of tuning market. Therefore, it is expected the system to show the engineering capability of korean damper company and to increase export market share to oversea damper market.

The Impact of Object Density on Motion Simulation in Virtual Space (가상공간에서 오브젝트의 밀도가 이동시뮬레이션에 미치는 영향)

  • Yoong, Hayoung;Koo, Jihun
    • Journal of Korea Game Society
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    • v.17 no.4
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    • pp.55-62
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    • 2017
  • In this study, motion simulation of Walk-through was evaluated with HMD(Head Mounted Display). More Specifically, we examined the changes of the degree of object density placed around virtual space on psychological moving distance, moving speed, and moving time. The results were as follows. First, the difference between the experimental conditions(low density, Medium density, High density) was significant. Second, as the density of the surrounding objects increased, the average point of moving time, moving speed, and moving distance rose compared to the basic conditions. Third, it was found that the surrounding objects improved the sense of time, speed and distance in motion simulation in virtual space.

Classification of the Lower Half of the Body by the Somatotypes of Elderly Men (노년 남성의 하반신 체형 유형화에 관한 연구)

  • Seok, Hye-Jung;Im, Nam-Young
    • Journal of the Korean Society of Costume
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    • v.59 no.8
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    • pp.123-131
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    • 2009
  • This study aims at presenting the basic data related to the somatotype of elderly men at the point of Korea's entering into an aging society. Efforts were made to classify the lower-half somatotype of elderly men, with the application of the measurements of 261 elderly men of 60 years of age and over up to 70, which were available from the physique measurement survey project for Koreans. The number of analysis items was 31. The statistical treatment was made through SPSS win 12.0 program, and the analytical methods used were the basic statistics, factor analysis, and cluster analysis. The findings are as follows: Elderly men experienced the decreases in height and weight, in comparison with middle-aged ones, while they showed a flat shape at trunk, with more protruded waist and abdomen and with flat buttock. The analysis of the constituting factors for the lower-half body of elderly men resulted in the 6 items. The elements constituting the lower-half body of elderly men included the shape from waist to hip, the spread of hip and height of knee, the shape of leg, thigh size, the length of leg, and the volume of abdominal. The total accountability was 81.59 %. The cluster analysis for lower-half somatotype of elderly men resulted in the classification of three types. The above findings are intended to assist the designing of ready-made slacks with a high level of fitness for elderly men.

Environmental Changes Due to Planting Pine Trees on the Coastal Dunes Along the East Coast of Korea - Case Study of Osan Beach in Yangyang-gun - (곰솔 조림으로 인한 동해안 사구의 환경변화 - 양양군 오산해변을 사례로 -)

  • Choi, Kwang Hee;Kong, Hak-Yang
    • Journal of The Geomorphological Association of Korea
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    • v.27 no.1
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    • pp.21-31
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    • 2020
  • Planting pine trees on the coastal dunes has been carried out along the East coast as well as West coast of South Korea. Although the artificial forestation has been regarded as a good policy that help to protect the coastal area from natural disasters, but its real effect to the landscapes is still unknown. In this study, we have installed a monitoring site with an automated weather station to study requirements for dune formation and its environmental changes in Osan beach, Yangyang-Gun, Gangwon Province. We analyzed the meteorological data collected from 2010 to 2019 and vegetational changes in the study area. As a result, the wind speed is decreased by around 30% and the pine-covered area is increased by around 300m2 after planting Japanese Black Pine in 2015. At present, it seems that the eolian transport of sand particle is minimal, because the dominant winds are the westerly winds which is not landward but seaward, and because the surface roughness length is about 0.5m which is similar to that in the deciduous forest.