• 제목/요약/키워드: Difference-In-Difference

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A Study of the Influence on Purchasing Process and Customer Satisfaction in Internet Shopping Mall by Electronic Commerce Education (전자상거래 교육이 인터넷 쇼핑몰의 구매과정과 고객만족에 미치는 영향)

  • 조동훈
    • Journal of the Korea Computer Industry Society
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    • v.2 no.7
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    • pp.875-884
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    • 2001
  • This study was attempted to find out the result of the comparison between participant group and absentee group of electronic commerce lecture in internet shopping mall. To find out difference among the burden for ordering, convenience for ordering, uneasiness for goods and service and satisfaction for goods and service, experimental approach was adopted. The finding were that burden for ordering, convenience for ordering and uneasiness for goods makes no difference, but satisfaction for goods and service make a difference. The result of the analysis in the research shows as following. First, they showed no difference between participant group and absentee group on the feeling burden during the ordering process. Second, they showed no difference between the two groups on the feeling of convenience during the ordering process. Third, they showed no difference between the two groups on the feeling of unstable for goods and service. Fourth, they showed no difference between the two groups on the feeling of convenience for goods and service.

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LEVEL OF TESTOSTERONE IN BLOOD PLASMA OF SELECTED RAMS

  • Abdul Wahid, S.;Yunus, J.M.
    • Asian-Australasian Journal of Animal Sciences
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    • v.8 no.6
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    • pp.583-585
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    • 1995
  • Following importation of temperate Australian breeds of sheep into Malaysia, it was demonstrated that there was variability in libido and semen productivity. Consequently, a study was conducted to determine the concentration of testosterone and relate it with libido and semen production. A total of 10 rams each of Dorset Horn, Cross of Merino with Border Leicester, Siamese Long Tail, Suffolk and local Malin were used to study the composition of testosterone in the blood plasma of these breeds. The study showed that there was significant difference between the testosterone level of different breeds in Spring and Summer but not in Autumn and Winter. The difference was pronounced in August and January. A significant difference (p > 0.05) was recorded in the testosterone levels of the different breeds during the day where Malin had better libido compared to the other breeds. There was no significant difference between the testosterone levels of the different breeds at night. The testosterone level of Suffolk, however, was elevated throughout the night (2.00 ng/ml and over) which resulted in better libido at night compared to the other breeds.

Diadochokinetic Characters in the Persons with Spastic Cerebral Palsy in Severity ; Rate, Regularity, Accuracy and Consistency (심한정도에 따른 경직형 뇌성마비인의 교호운동 특성 ; 속도, 규칙성, 정확성 및 일관성을 중심으로)

  • Nam Hyun-Wook;Ahn Jong-Bok;Kwon Do-Ha
    • Proceedings of the KSPS conference
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    • 2006.05a
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    • pp.105-108
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    • 2006
  • The purpose of this study was to investigate the diadochokinetic characters in the patients with spastic cerebral palsy(CP) in severity. The diadochokinetic characters were measured through rate, regularity, accuracy and consistency. The subjects participated in this study included 27 persons with spastic CP(mild- 9, moderate- 9, severe- 9) and 9 normal persons who is around 11-20 years old. On the result of this study, rate in AMR was significant difference between all spastic groups and normal group, and rate in SMR was significant difference between normal and mild groups and moderate and severe groups. In regularity of diadochokinetic task, severe group had significant difference the other groups. Finally, accuracy and consistency of diadochokinetic task exhibited significant difference between all spastic groups and normal group.

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Change of Characteristic Curves using Light Emission Spectrum of the Intensifying Screens (증감지의 발광스펙트럼에 따른 특성곡선의 변화)

  • Yoon, Chul-Ho;Kang, Hong-Seok;Lee, In-Ja;Huh, Joon
    • Journal of radiological science and technology
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    • v.13 no.2
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    • pp.21-25
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    • 1990
  • This report is study about difference of H-D curve in regular film and ortho type film, and obtained results as follows : 1. In the blue-color emission intensifying screen, ortho type films and in the green-color emission intensifying screens, regular type are decreased in their gradient. 2. When joint use of regular type film and ortho type film, the gradient difference not seen in blue color screen. 3. The gradient difference seen clearly in G4, KM screens(green color emission intensifying). Especially, in part of high film density, the gradient difference are great. So we have to right use of screen and film because not matched used of theare the sensitivity and gradient are decrease.

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A Study on Elimination of Color Difference of Combat Uniform Fabrics through Spectrophotometer by Various Manufacturers (디지털 측색 방법을 활용한 제조업체별 전투복 원단 색차 해소방안 연구)

  • Choi, Sujin;Yeom, Seulki;Lee, Minhee;Hong, Seongdon
    • Journal of Korean Society for Quality Management
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    • v.48 no.3
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    • pp.481-492
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    • 2020
  • Purpose: The purpose of this study was to minimize the difference between color of fibers of combat uniforms occurring depending on the type of dye or process of each manufacturer. Methods: Color difference between combat uniforms made from different manufacturers in mass production by lot was analyzed using spectrophotometer and calculated by color difference formula. Results: By the results of analyzing the color difference between combat uniforms made from different manufacturers with moving average and time series analysis, the feedback to each manufacturer was given. Conclusion: By this study, the color deviation of combat uniforms from different manufacturers was improved to be reduced.

Difference and Desire as Conditions of Narrative: Focusing on the Case, the Film (서사의 조건으로서 차이와 욕망: 영화 <로맨스조> 사례를 중심으로)

  • Kim, Mookyu
    • The Journal of the Korea Contents Association
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    • v.13 no.1
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    • pp.105-114
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    • 2013
  • The purpose of this paper is to explain the operation and meaning of the narrative, which is one of the main principles for the contents construction, especially focusing on the concepts 'difference' and 'desire'. The classical aesthetic taught us that the differences between diverse characters and reality models are the effective strategy for the reading the story. But this paper focuses on the structural difference of the event (story) and performance (discourse) of narrative, which are regarded as the basic condition of narrative. This difference is to describe in terms of the media theory and psychoanalysis. This paper also seeks to interpret the recent korean film to exemplify that the creation of difference for the fulfillment of desire is the basic element of the narrative constitution.

Effects of the C31G, Listerine and CPC as a adjunctives to the mechanical plaque control on the early periodontitis (기계적 치태조절 보조제로서 C31G, Listerine, CPC의 초기 치주염에 대한 임상적 효과)

  • Kim, Chong-Kwan;Park, Ji-Sook;Han, Kwang-Hee;Suh, Jong-Jin;Choi, Seong-Ho;Cho, Kyoo-Sung;Chai, Jung-Kui
    • Journal of Periodontal and Implant Science
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    • v.28 no.4
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    • pp.631-646
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    • 1998
  • The purpose of this study was to access the clinical effects of C31G, Listerine and CPC on the earlyx periodontitis when they were used as a adjunctives to the mechanical plaque control. Each groups were composed of 12 patients and in three test groups, C31G(Exp 1 group), Listerine(Exp 2 group) and CPC mouthrinse(Exp 3 group) were used three times a day. and as a control, placebo solution was used. Plaque index, gingival index, bleeding index, pocket depth and loss of attachment were measured as clinical parameters. After scaling and oral hygiene instruction, root planing is done two weeks later. During the eight weeks of experimental period, mouth gargling is done by all groups. The changes in the clinical parameters of the all sites were monitored every two weeks. The results were as follows : 1. The plaque index showed a siginificant difference in Exp 1 group compared with test 2 group after 2 weeks use of mouth rinse(P<0.05). 2. The gingival index showed a significant difference in Exp 1 group compared with baseline value(P<0.05) but there was no significant difference between the groups after 2 weeks use of mouthrinse (P<0.05). 3. The plaque index, gingival index and bleeding index showed a significant difference in all groups compared with baseline value after 4 weeks of root planing and mouthrinse use(P<0.05). but there was no significant difference between the groups(P<0.05). 4. Periodontal pocket depth showed a significant difference in all groups compared with baseline value after 4 weeks of root planing and mouthrinse use(P<0.05). and there was significant difference between the Exp 1 group and control group(P<0.05). 5. Loss of attachment showed a significant difference in all Exp groups compared with baseline value after 4 weeks of root planing and mouthrinse use(P<0.05). and there was significant difference between the Exp 1 group and control group(P<0.05). The results suggest that C31G, Listerine and CPC were effective for early periodontitis as a adjunctive to mechanical plaqe control.

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A Study on Airborne Microbes Contamination that Influences on Nosocomial Infection (병원내 감염에 영향을 미치는 공기오염 상태에 대한 조사 연구)

  • 최영희;박정호;윤혜상;문영숙
    • Journal of Korean Academy of Nursing
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    • v.12 no.1
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    • pp.39-52
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    • 1982
  • Nosocomial infection is important in the management of the nursing care and has been found to be related with the airborne microbes contamination. The purpose of this study is to identify the differences of the airborne microbes between hospitals, nursing units, days and times and to identify the difference in the types of microorganisms between hospitals, nursing units, days and times. This study was conducted from May 25, to July 10, 1981, according to R. Koch's methods for quantative samplings of airborne microbes and the results of this study were reviewed in a statistical method. The following conclusions were obtained: 1. There was a significant difference in the types of airborne microbes between 8 hospitals (F=5.0491, p<0.01) 2. There was a significant difference in the types of airborne microbes between surgical, medical, nursery, 1.C.U., operating theatre and outpatient nursing unit. (F=2.1764, p<0.05) 3. There was not a significant difference in the types of airborne microbes between Monday, Thursday and Saturday (F= 1.6365, p>0.05) 4. There was a significant difference in the types of airborne microbes between AM 7 : 00, AM 11:00 and PM 3 : 00. (F=7.2951, p<0.01) 5. 4061 colonies were divided into more 48 types and the classification was as follows. gram positive cocci (2024 colonies) 49.3% gram positive bacillus (1211 colonies) 29.8% gram negative bacillus (577 colonies) 14.2% fungus(200colonies) 4.9% gram negative cocci (41 colonies) 1.0% other's(8 colonies) 0.3% 6. There was a significant difference of airborne microbes between 8 hospitals. (F=7.7943, P<0.01) 7. There was not a significant difference of airborne microbes between 6 nursing units. (F= 1.8461, P>0.05) outpatient nursing unit : 12.6 colonies surgical nursing unit. 10.4 colonies Medical nursing unit : 9.8 colonies nursery nursing unit : 9.4 colonies operating theatre nursing unit:8.2 colonies Intensive care nursing unit : 7.8 colonies 8. There was not a significant difference of airborne microbes between Monday, Thursday and Saturday. (F=1.4371, p>0.05). Saturday : 11.0 colonies Monday : 9.1 colonies Thursday : 9.1 colonies 9. There was a significant difference of airborne microbes between A. M. 7 ; 00, A. M. 11 : 00 and P .M. 3:00 (F=7.6658, p<0.05) P. M. 3 : 00 : 12.2 colonies A. M. 11 : 00 : 10.0 colonies A. M. 7 : 00 : 7.1 colonies.

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The Comparison of Right and Left Abdominal Temperature of dysmenorrhea patients using DITI (DITI를 이용한 월경통 여성의 좌우 복부온도 비교)

  • Kim, Seung-Hyun;Ahn, Soo-Jeong;Cho, Jung-Hoon;Jang, Jun-Bock;Lee, Kyung-Sub
    • Journal of Oriental Medical Thermology
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    • v.2 no.1
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    • pp.24-28
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    • 2003
  • Purpose: We aim to research the difference of abdominal temperature in dysmenorrhea patients comparing with that of normal person. Metholds: We selected the 49 dismenorrhea patients as study group and 54 normal persons as control group, excluding the patients who have dermatitis, ared over 70 or under 10. and have extreme obesity. We compared the 4 points(Rt and Lt Gimun(LR14) and Guirae(ST29)) in thd abdomen of both group, check the temperature of those points with DITI(Dorex, DTI-16UTI) to compare the temperature difference with each other. For statistics, we use independent T-test, SPSS 8.0 for windows. Results: The temperature difference between Rt and Lt Gimun which are in upper abdomen shows statistically significant result in study group. Conclusion: The dysmenorrhea patients show larger temperature difference between Rt and Lt points in upper abdomen than normal persons. In lower abdomen, the temperature between control and study group shows little difference.

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Difference Limen for Just Noticeable Change of Booming Sensation in Frequency (차량 부밍소음의 청감 변화 인지를 위한 주파수 역치)

  • Shin, Sung-Hwan;Ih, Jeong-Guon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2005.05a
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    • pp.621-624
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    • 2005
  • Among many auditory feelings for the vehicle interior noise, booming is considered as the most important nuisance to the passenger and developer. Because the main source of booming noise is a power train system including engine, in general, it consists of tonal components related to fundamental engine rotation and its harmonics including the firing frequency. Therefore, it is demanded to extract the effective tonal components only by using pitch extraction algorithm based on the place theory enable to find aurally relevant tonal components. However, there is a difference between booming sensation and pitch perception according to frequency change of tonal component. In this study, subjective listening test using a tracking method was performed to find the difference limen for just noticeable change of booming sensation in frequency. 20 Koreans and 10 Japanese were participated in this test and the results obtained from Koreans and Japanese were compared with each other. Finally, 5Hz was determined as the difference limen for just noticeable change of booming sensation in frequency, and by applying this value to booming analysis using pitch concept, it was confirmed that the degree of prediction of booming sensation was improved.

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