• 한국가스학회지
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• 제12권1호
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• pp.31-35
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• 2008

압축천연가스 자동차는 최근 대기환경 개선을 위해 대도시 시내버스에 적용되고 있으며 대기 오염물질을 저감시키는데 효과적인 것으로 입증되고 있다. 압축천연가스의 단점인 낮은 연료저장밀도를 높이기 위해 액화천연가스를 연료로 하는 차량기술이 시도되고 있다. 본 논문에서는 자동차에 액화 천연가스를 적용하기 위한 LNG 저장 용기의 단열특성을 실험적으로 측정하여 기준과의 적합성을 판단하였으며 측정방법에 대한 비교검토를 통해 측정결과의 신뢰성을 제고하였다. 시험용기의 단열성능계수는 $40J/h{\cdot}^{\circ}C{\cdot}m^2$으로 기준범위 이내의 성능을 확인하였으며 두 가지 측정방법들은 상호 일치하는 결과를 보여주었다. 또한 용기의 벤트밸브 동작특성을 조사하여 증발가스의 방출량 특성을 파악하였다.

• 동의생리병리학회지
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• 제22권5호
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• pp.1250-1255
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• 2008

Onchungeum(OCE), a herbal formula, has been used for treatment of anemia, discharging blood and skin diseases. In the previous study, we investigated the anti-cancer effect of OCE by G1 arrest of the cell cycle in human hepatocarcinoma cells, Hep3B cells. In this study, it was examined that the difference of anti-proliferative mechanisms by change in the ratio of OCE composition (OCE I) in Hep3B cells. Treatment of OCE I exhibited a relatively strong anti-proliferative activity and caused various morphological changes such as membrane shrinkage and cell floating. In addition, OCE-I arrests the cell cycle at G1 phase, which was associated with the down-regulation of cyclin D1 and Cdk6 expressions. The G1 arrest was also associated with the induction of Cdk inhibitors p27 and p21. Moreover, both p21 and p27 were detected by immunoprecipitation with anti-Cdk4 and anti-Cdk2 antibodies in OCE I-treated cells but in case of OCE, p21 did not make any complexes with Cdk4 and Cdk2. These results suggest that the change in the ratio of OCE composition might induce different mechanisms in anti-cancer efficacy of OCE, which may confer characteristic principles in oriental medical formula.

• 한국중재학회지:중재연구
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• 제23권4호
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• pp.3-27
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• 2013

Overriding Mandatory rules are laws that purport to apply irrespective of the law chosen by the parties to govern their contractual relations. This article examines their role and applicability in international arbitration. The overriding mandatory rules pose a complex and continuing problem for arbitrators because they put the interests of states and parties in direct competition. When a law says that arbitrators must apply it, yet the parties' contract excludes it, what should the arbitrators do? Where should their allegiance lie? The answer depends on the underlying nature of arbitration - and since that can be legitimately conceptualized in different ways, a principled approach to overriding mandatory rules seems to be impossible to provide. Nevertheless, a practical solution is required, because there were European cases in which courts voided valid arbitration agreements made, reasoning that arbitrators certainly would not apply and/or take into account its overriding mandatory rules of indemnity right granted to commercial agent and distributor in Europe. Therefore, this paper first examines status of overriding mandatory rules of another law in international litigation and then explores any possibility of application of overriding mandatory rules of another law in international commercial arbitration. With this analysis, the author reaches into a conclusion that the arbitrator should and/or take into account overriding mandatory rules of another law, yet should limit to them of the country where characteristic performance is made under the contract.

• Journal of Electrical Engineering and Technology
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• 제5권1호
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• pp.116-128
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• 2010

Modeling of the three phase electric arc furnace and its voltage flicker mitigation are the purposes of this paper. For modeling of the electric arc furnace, at first, the arc is modeled by using current-voltage characteristic of a real arc. Then, the arc random characteristic has been taken into account by modulating the ac voltage via a band limited white noise. The electric arc furnace compensation with static VAr compensator, Thyristor Controlled Reactor combined with a Fixed Capacitor bank (TCR/FC), is discussed for closed loop control of the compensator. Instantaneous flicker sensation curves, before and after accomplishing compensation, are measured based on IEC standard. A new method for controlling TCR/FC compensator is proposed. This method is based on applying a predictive approach with closed loop control of the TCR/FC. In this method, by using the previous samples of the load reactive power, the future values of the load reactive power are predicted in order to consider the time delay in the compensator control. Also, in closed loop control, two different approaches are considered. The former is based on voltage regulation at the point of common coupling (PCC) and the later is based on enhancement of power factor at PCC. Finally, in order to show the effectiveness of the proposed methodology, the simulation results are provided.

• 대한통합의학회지
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• 제10권3호
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• pp.107-117
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• 2022

Purpose : The purpose of this study was to establish a model of the predictive factors for success or failure of examinees undertaking the Korean physical therapist licensing examination (KPTLE). Additionally, we assessed the pass/fail cut-off point. Methods : We analyzed the results of 10,881 examinees who undertook the KPTLE, using data provided by the Korea Health Personnel Licensing Examination Institute. The target variable was the test result (pass or fail), and the input variables were: sex, age, test subject, and total score. Frequency analysis, chi-square test, descriptive statistics, independent t-test, correlation analysis, binary logistic regression, and receiver operating characteristic (ROC) curve analyses were performed on the data. Results : Sex and age were not significant predictors of attaining a pass (p>.05). The test subjects with the highest probability of passing were, in order, medical regulation (MR) (Odds ratio (OR)=2.91, p<.001), foundations of physical therapy (FPT) (OR=2.86, p<.001), diagnosis and evaluation for physical therapy (DEPT) (OR=2.74, p<.001), physical therapy intervention (PTI) (OR=2.66, p<.001), and practical examination (PE) (OR=1.24, p<.001). The cut-off points for each subject were: FPT, 32.50; DEPT, 29.50; PTI, 44.50; MR, 14.50; and PE, 50.50. The total score (TS) was 164.50. The sensitivity, specificity, and the classification accuracy of the prediction model was 99 %, 98 %, and 99 %, respectively, indicating high accuracy. Area under the curve (AUC) values for each subject were: FPT, .958; DEPT, .968; PTI, .984; MR, .885; PE, .962; and TS, .998, indicating a high degree of fit. Conclusion : In our study, the predictive factors for passing KPTLE were identified, and the optimal cut-off point was calculated for each subject. Logistic regression was adequate to explain the predictive model. These results will provide universities and examinees with useful information for predicting their success or failure in the KPTLE.

• 환경영향평가
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• 제3권2호
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• pp.57-67
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• 1994

The National Park should be preserved as described in the regulation. However, the development has resulted in degrading the environment in the park. Especially, the collective facility area has been developed for the commercial benefit rather than for the preservation. So, it is necessary to figure out the impact of the development plan proposed. Thus, the purpose of this study is to explore the hydrologic effects due to the collective facility area development in the National Park. The study site is the second collective facility area of Mt. Kyeryong National Park. The analysis of hydrologic effects due to the development has been carried out using the GIS in this study. The Rational Method and Soil Conservation Service(SCS) were used to estimate the runoff volume. During this procedure, GIS software, ARC/INFO was used to integrate, manipulate, and calculate the attribute value of a number of ploygons which represen each land use characteristic. A program was written to compute the attribute value of each polygon and to estimate the difference of peaktime runoff volume before and after development.

• 수산해양기술연구
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• 제48권1호
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• pp.91-98
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• 2012

This study is aimed to utilize a basic data for setting up an allowable air noise with IMO standard in accommodation and working areas of 24m longer fishing vessels. The air noise in accommodation and working areas of 300 tons class squid-jigger were evaluated and the levels were compared to the allowable levels of IMO. The results indicated that the maximum range of noise levels was estimated to be between 54.8dB (A) and 83.2dB, and the correlation between the distance from the main engine to measuring point and the maximum noise level of each point was shown to be y=-13.8log (r)+92.91 ($r^2=0.821$). In addition, except the case of making an accommodation area near to the engine room in 24m longer jigging vessels, it was evaluated that the accommodation noise regulation of 1,600 tons international voyage vessels with 60dB (A) or an improved noise level with 65dB (A) could be properly applied.

• 대한기계학회논문집B
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• 제28권10호
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• pp.1172-1177
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• 2004

The emission control of automobile has been intensified as a part of the countermeasure to decrease air pollution in the world. As the cars with an alternative fuel starts to get into the spotlight, the cars with low emission has been introduced and exhaust gas regulation forced in this country. These days, LPG vehicles, which infrastructure of fuel was already built up, and CNG vehicles are recognized for alternative fuel cars in this country. In this study, the constant volume combustion chamber was manufactured and used for experiments to obtain the combustion characteristics of propane mixture. The combustion characteristics was analyzed, with the change of supply conditions of propane fuel. Inside the combustion chamber, the maximum temperature increase with the initial pressure is going up. The burning velocity also seems to have the same characteristic as the temperature. However, the heat flux do not change much according to the theoretical correct mixture but it changes with the various initial temperature of the combustion chamber.

• 한국주거학회논문집
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• 제16권6호
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• pp.129-137
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• 2005

The purpose of this study was to understand the present condition about the space planning of the nursing rooms at the child care center in U.S.A. The researchers investigated the physical conditions of the centers through sketching, measurement, taking pictures and observation. On the other hand, to understand the user's needs, the interview to the directors of the centers was performed. As a result, the followings were proposed. The grouping of children depending upon the age has to be more classified according to the development period. And the guideline for the space areas has to be improved to a larger standard than present regulation. And the most impressive characteristic of the center in U.S.A. is the functional space design. The space such as toilet, washing room, kitchenet are well organized into the nursing rooms for children. Various ideas for arranging above functions in the small nursing rooms have to be developed in Korea. And the dynamic space arrangement of nursing room is also impressive. The material of the floor has to be considered variously for the comfort of the children.

• 한국문헌정보학회지
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• 제26권
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• pp.113-139
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• 1994

Government archives are basic source materials in the historical study. Whereas, researches on the archives of Choson-chongdokbu have been very scant. Those archives contain information about both colonism of Japan and independent movement of Korea are comparatively well preserved at Government Archives and Record Services. Therefore, it is necessary to analyze the characteristic of archives and to evaluate the system of archival management of Choson-chongdokbu. Based on the official gazette and archives of Choson-chongdokbu, this study has revealed the division of archival work, the writing and treatment of official document, compilation and preservation, and the procedure of use and destruction. As a result of the research, the followings have been identified; 1. Archival regulations were prepared by the instructions of Choson­chongdokbu at the early days of its establishment. Inspite of several revisions, its basis was maintained until 1945. 2. Each agency had its own archival department instead of central archives. 3. The archival department of Choson-chongdokbu controlled the archival administration of headquarters and attached agencies. But the secret archives were managed by the secretarial department. 4. The writing and treatment of archives were done by the archival regulation made in 1911. 5. Each agency had set more or less different preservation period. 6. There were three ways of using archives, 1) the in-house reading 2) the loan 3) the transcriptions. The archives passed the preservation period were destroyed in accordance with the related departments.