• 무역상무연구
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• 제12권
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• pp.39-64
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• 1999

Under the CISG, there is a unequitable factor in comparing buyer's remedy with seller's remedy. In my opinion, CISG is more unequitable remedy clause than UCC or UNIDROIT principle of International Commercial Contract(1994) between seller and buyer. First, buyer who accepted defect goods must give seller notice the facts that seller delivered defect goods in two years after accepting defect goods. The cap of two year is unreasonable in a position of aggrieved buyer. This is being provided as 'within reasonable time' in UCC and there is no such provision in UNIDROIT Principle. Second, Buyer can avoid contract when seller breached fundamentally contract or seller didn't set a additional performance period about breaching of contract. Accordingly if buyer would not set a additional performance period, although seller's breachment of contract, he could not avoid the contract. Therefore, From a viewpoint of aggrieved buyer avoidable right of contract is restrainted. Third, to compare seller's remedy with buyer's, seller have more opportunity to cure breachment of contract than buyer. Under the CISG buyer is relatively placed at disadvantage in remedy of aggrieved party. In connection with remedy of aggrieved party, 'UNIDROIT principle of international commercial contracts' instead seller and buyer of aggrieved party, so there is not unequitable factor in remedy of aggrieved parties.

• 한국도로학회논문집
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• 제18권2호
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• pp.51-60
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• 2016

PURPOSES : The applicability of the mechanics-based similarity concept (suggested by Feng et al.) for determining scaled variables, including length and load, via laboratory-scale tests and discrete element analysis, was evaluated. METHODS: Several studies on the similarity concept were reviewed. The exact scaling approach, a similarity concept described by Feng, was applied in order to determine an analytical solution of a free-falling ball. This solution can be considered one of the simplest conditions for discrete element analysis. RESULTS : The results revealed that 1) the exact scaling approach can be used to determine the scale of variables in laboratory tests and numerical analysis, 2) applying only a scale factor, via the exact scaling approach, is inadequate for the error-free replacement of small particles by large ones during discrete element analysis, 3) the level of continuity of flowable materials such as SCC and cement mortar seems to be an important criterion for evaluating the applicability of the similarity concept, and 4) additional conditions, such as the kinetics of particle, contact model, and geometry, must be taken into consideration to achieve the maximum radius of replacement particles during discrete element analysis. CONCLUSIONS : The concept of similarity is a convenient tool to evaluate the correspondence of scaled laboratory test or numerical analysis to physical condition. However, to achieve excellent correspondence, additional factors, such as the kinetics of particles, contact model, and geometry, must be taken into consideration.

• 한국정보시스템학회지:정보시스템연구
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• 제29권4호
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• pp.193-208
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• 2020

Purpose Due to COVID19, the over-the-top media service (OTT) market is growing faster than expected at an annual average of 26.4%. In Korea, WAVVE, which integrated SKT's Oksusu and POOQ in September 2019, outperformed Netflix in the number of users immediately after its launch, but the number of users gradually decreased. Research on OTT investigated the spread of new media due to changes in regulations or policy, mostly in broadcasting media. On the other hand, OTT research in information systems began after the success of Netflix. It investigated consumers' satisfaction with information technology using the Information Technology Acceptance Model (TAM). This study investigates changes in consumer perceptions in the OTT market, which has grown after the Netflix's entry into Korea, the emergence of WAVVE and new OTT service providers, and the spread of COVID19. Design/methodology/approach This study selects contents, fees, service quality, and additional services as factors to evaluate consumer perception using AHP. Findings According to the 101 respondents, the content was the most important factor, followed by service quality, fees, and additional services. Contrary to previous findings that price is the determining factor in service adoption, this study reveals that consumers are willing to pay a reasonable amount for rich content and excellent service quality. Future research will use demographic analysis to reveal differences in consumer's perceptions of service selection.

• Journal of Korean Neurosurgical Society
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• 제41권2호
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• pp.88-94
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• 2007

Objective : The aim of this study is to investigate predictable risk factors for radiologic degeneration of adjacent segment after lumbar fusion and preoperative radiologic features of patients who underwent additional surgery with adjacent segment degeneration. Methods : Between January 1995 and December 2002, 201 patients who underwent lumbar fusion for degenerative conditions of lumbar spine were evaluated. We studied radiologic features, the method of operation, the length of fusion, age, sex, osteoporosis, and body mass index. Special attention was focused on, preoperative radiologic features of patients who required additional surgery were studied to detect risk factors for clinical deterioration. Results : Follow-up period ranged from 3 to 11 years. In our study, 61 [30%] patients developed adjacent segment degeneration, and 15 [7%] patients required additional surgery for neurologic deterioration. Age, the postoperative delay, facet volume, motion range, laminar inclination, facet tropism, and preexisting disc degeneration of adjacent segment considered as possible risk factors. Among these, laminar inclination and preexisting disc degeneration of adjacent segment were significantly correlated with clinical deterioration. Conclusion : The radiologic degeneration of adjacent segment after lumbar fusion can be predicted in terms of each preoperative radiologic factor, age and the postoperative delay. Laminar inclination and preexisting disc degeneration of adjacent segment have shown as strong risk factors for neurologic deterioration. Thus, careful consideration is warranted when these risk factors are present.

• Journal of Korean Neurosurgical Society
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• 제29권6호
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• pp.731-737
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• 2000

목 적 : 종양세포의 세포면에서는 성장인자 수용체들이 과발현되고 이들이 성장인자들과 결합함으로서 세포의 성장을 촉진하게 된다. 원발성 악성 뇌종양에 대한 새로운 치료법 중 하나가 면역독소를 사용하는 방법이다. 독소는 대상 세포의 세포면에 있는 수용체를 통해 세포질로 이행되며, 면역독소가 선택적인 항종양작용을 나타내기 위해서는 수용체가 과발현되어야 한다. 강력한 세포독성의 효과가 있음에도 불구하고 면역독소를 환자에 투여하였을 때 종양을 완치시키지는 못하였는데, 면역독소의 효과에 영향을 미치는 여러 인자들에 대한 더 많은 연구가 요구된다. 이러한 연구에 사용되어질 뇌종양세포주들에서 성장인자수용체들의 발현 여부를 알아보기 위해 본 연구를 시행하였다. 대상 및 방법 : 한 개의 수모세포종 세포주(Daoy)와 두 개의 교모세포종 세포주(U373 MG, T98 G)에서, transferrin 수용체, insulin-like growth factor-1 수용체, 그리고 interleukin-4 수용체들의 발현을 flow cytometric analysis를 이용하여 조사하였다. 결 과 : Transferrin 수용체와 interleukin-4 수용체는 Daoy, U373 MG, 그리고 T98 G 모두에서 발현되었다. Insulin-like growth factor-1 수용체는 Daoy와 U373 MG에서는 발현되었지만 T98 G에서는 발현되지 않았다. 결 론 : Transferrin 수용체와 interleukin-4 수용체는 면역독소 치료에 적합한 것으로 보인다. 본 실험의 결과는 상기의 세포주를 사용하여 면역독소와 관련된 실험을 하는데 참고가 되어야하며, 면역독소 치료에 있어서 적절한 면역독소를 선택하는 문제 등 치료 모델을 확립하는데 고려되어야 할 것이다.

• 아동학회지
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• 제15권2호
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• pp.195-211
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• 1994

This study was designed to examine the effects of family structure (nuclear, extended family) on children's behavioral and emotional problems. The subjects of this study were 650 primary school children aged 8 to 13 living in Seoul and Incheon (324 from nuclear and 326 from extended families). The Children's Behaviour Questionnaire (CBQ: Rutter, 1970) and a questionnaire containing demographic questions and some additional questions were used for instruments. For the analyses, frequencies, descriptives, chi-square, factor analysis, and t-test were used. The results were analysed and explained in their cut-off points, prevalences, differences and factor structures. The cut-off score obtained in this study was 18, and the prevalences with this cut-off score were 6.3% in total subjects, 8.0% in nuclear families, and 4.6% in extended families. The children from extended families showed less behavioral and emotional problems, especially antisocial behaviours, compared with those from nuclear families, and this difference was significant (p<.05). The factor structures of the CBQ were 'antisocial', 'neurotic', 'mannerism' and 'speech' in total subjects, and, in the case of nuclear families, the factor structures were same as in total subjects, but, in the case of extended families, the 'emotional anxiety' factor was included instead of the 'speech' factor.

• Journal of Mechanical Science and Technology
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• 제15권1호
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• pp.44-51
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• 2001

One of the recent issues in design of the spot-welded structure such as the automobile body is to develop an economical prediction method of the fatigue design criterion without additional fatigue test. In this paper, as one of basic investigation for developing such methods, fracture mechanical approach was investigated. First, the Model I, Mode II and Mode III, stress intensity factors were analyzed. Second, strain energy density factor (S) synthetically including them was calculated. And finally, in order to decide the systematic fatigue design criterion by using this strain energy density factor, fatigue data of the ΔP-N(sub)f obtained on the various in-plane bending type spot-welded lap joints were systematically re-arranged in the ΔS-N(sub)f relation. And its utility and reliability were verified by the theory of Weibull probability distribution function. The reliability of the proposed fatigue life prediction value at 10(sup)7 cycles by the strain energy density factor was estimated by 85%. Therefore, it is possible to decide the fatigue design criterion of spot-welded lap joint instead of the ΔP-N(sub)f relation.

• 한국IT서비스학회지
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• 제6권2호
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• pp.63-80
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• 2007

In this paper, the function factors contributing to ITA/EA functions in their organizations, are suggested. Also the reasons to the construction of IT governance system and their effects on the their organizations are discussed and the relationships are verified by empirical model. From the survey, the data of the 227 respondents were collected and regression analysis was performed for validating the research model. ITA/EA functions consist of the IT infrastructure systemization, ITA/EA business process support, IT investment efficiency factors. And the factors of IT resource and performance management, IT process management, IT service management are included to IT governance. The main analysis results described significantly are shows as follows. At first, IT resource and performance management factor is effected by the ITA/EA business process support factor and IT investment efficiency factor. In similarly, IT service management factor is also affected by the factors such as ITA/EA business process support, IT investment efficiency, and IT infrastructure systemization. In additional analysis, IT investment efficiency factor in official sectors, ITA/EA business process support factor in private sectors respectively are described as the significant factors on the IT governance.

• 한국항공우주학회지
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• 제31권1호
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• pp.73-84
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• 2003

항공기내 연료온도의 변화가 유한차분식에 의하여 해석되었다. 항공기의 여러 임무 가운데 근접항공지원 임무가 20% hot day 외부대기 조건과 함께 이음속 영역에서 고려되었다. 수정 Dufort-Frankel기법의 explicit방법에 의해 수치계산이 수행되었다. 항공기는 난류유동장내에 있는 것으로 가정되었다. 추가 연료공급-회송 개념을 갖는 항공기 연료시스템 모델이 고려되었다. 본 해석의 결과로써, 추가연료 공급이 증가함에 따라 연료탱크의 온도는 상승함을 보인 반면, 엔진 입구에서의 연료온도는 몇몇 비행단계 및 엔진 연료요구량이 많은 구간을 제외하고는 감소함을 보였다. 본 해석으로부터, 추가 연료공급-회송개념을 사용한 연료시스템이 엔진입구 연료온도를 낮추기 위한 효과적인 방법임을 나타났다. 또한, 연료/오일 열교환기로 흐르는 연료유동량이 연료온도 변화에 중요한 인자임이 밝혀졌다.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• 제11B권4호
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• pp.193-199
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• 2001

This paper suggests a novel single-stage drive for a switched reluctance motor (SRM) to achieve sinusoidal, near unity power factor input currents. The proposed drive is very simple without additional active switch. As a single-stage approach, which combines a DC link capacitor used as dc source and a drive used for driving the motor into one power stage, a simple structure and low cost drive in implemented. A prototype drive for an 8/6 pole SRM equipping a suitable encoder is designed to evaluate the proposed topology. Also subscription control algorithm is presented. The characteristics and validity of the proposed circuit will be discussed in depth through the experimental results.