Study on the Link Analysis for Satellite Broadcasting Service Using Ka Band Transponders in the Korean Area

윤기창,김승철,손원,Yoon, Ki-Chang,Kim, Seung-Chul,Sohn, Won Korea Society of Satellite Technology 2008 한국위성정보통신학회논문지 Vol.3 No.2

The study discussed the link analysis for the Ka band satellite broadcasting service in Korea with respect to the transmission schemes based on the DVB-S2 standard. To analyze the effect of the rain fading to the link budget, we estimated the rain attenuation from the measured rainfall intensity in Korea. We analyzed the link budget for the Ka band transponders of Koreasat-3, and DirecTV BSS-99W, and showed the possible link availability with the DVB-S2 transmission schemes for each transponder. Based on the link analysis of the available satellites with the Ka band transponders, we suggested the required EIRP for the satellite which will be employed for the Ka band satellite broadcasting service in Korea.

Ka대역 위송방송 신호의 강우강도에 따른 전송기법

윤기창(Yoon Ki-Chang),김승철(Kim Seung-Chul),손원(Sohn Won) 한국방송·미디어공학회 2009 한국방송미디어공학회 학술발표대회 논문집 Vol.2009 No.11

이 연구는 Ka대역 위성 HDTV 방송 서비스를 제공하기 위해 강우강도에 따른 전송방안을 제안하였다. Ka대역은 Ku대역에 비하여 강우에 취약하기 때문에 이를 안정적으로 활용하기 위해서는 강우감쇠를 효과적으로 경감시키는 기술개발이 필수적이다. 유럽위성방송 표준인 DVB-S2에서는 강우감쇠에 대한 대처방안으로 채널상황에 따라 여러 변조방식과 채널 부호 율을 이용하는 적응형 변복조 방식을 지원하고 있으며, 이 논문에서는 DVB-S2기반의 전송방식과 Ka대역 중계기의 규격을 적용하여 강우강도에 따른 전송방안을 제안하였다. 이를 위하여 ITU-R P.618-9 강우감쇠 추정 모델과 기상청에서 측정한 1998년부터 2007년까지의 최근 10년간 국내 주요지역의 30분 누적강우량을 이용하여 지역별 강우 감쇠값을 도출하였고 강우강도와 시간 율 관계분석을 통하여 강우강도에 따른 강우감쇠 값을 획득하였다. 획득한 강우감쇠 값을 무궁화 위성 3호의 링크 설계에 적용하여 강우강도에 따른 적용 가능한 전송방안을 도출하였다. 이 연구를 바탕으로 강우의 지역적 편이가 높은 우리나라의 강우 특성을 유연하게 반영하여 각 지역에 맞는 적응적인 전송 방식을 고려할 수 있다.

수출벤처기업의 네트워크와 경영성과 간의 관계에서 흡수능력의 역할에 관한 연구

윤기창(Ki-Chang Yoon),김문홍(Moon-Hong Kim) 한국무역학회 2015 무역학회지 Vol.40 No.5

This study investigates the role of absorptive capacity in the relationship between exporting ventures network and performance. A literature review on this research concept has been conducted and the hypothesis has been set up. The hypothesis is proved by structural equation modeling (SEM) of the data on exporting ventures, gathered through structured questionnaires. As a result, we established that there is a significant relationship between network size and absorptive capacity, and between network capability and firm performance. However, there is no effect of network size on management performance, and network capability on absorptive capacity. Absorptive capacity significantly plays the mediating role between network size and firm performance, and the significant moderating role between network capability and firm performance. These results have some very important implications for exporting ventures in structural relations among network, absorptive capacity and their performance.

한국 다국적기업의 중국 자회사의 지식이전, 네트워크와 경영성과에 관한 연구

윤기창(Ki-Chang Yoon) 한국무역학회 2016 무역학회지 Vol.41 No.5

This study empirically investigated the relationship among knowledge transfer, network(firm network and government network) and performance Korean MNCs’ subsidiaries in terms of absorptive capacity and entry mode roles in China. For this, absorptive capacity was established as an independent variable, mediating variable, and moderating variable. And the entry mode was divided into single investment and joint venture and set to the moderating variable. Data for the analysis of actual proof was randomly selected from the companies which was established more than 3 years before KOTRA ‘The overseas expansion Korean company directory (2014)’. Questionnaires to 138 Chinese subsidiaries of Korean MNCs were collected by FAX and E-mail. AMOS was utilized and collected data investigated the role of the absorption capacity and entry mode as the covariance structure analysis. The empirical analysis showed that absorption capacity has a direct influence on management performance as an independent variable with the network (firm network and government network). It only has a partial mediating role between enterprise networks and management performance, and no meaningful result was gained as its moderationg role bewteen the exogenous variable and management performance. And in terms of Korean companies moderating role in entering China, they have a moderating role between government network, absorption capacity and management performance, but did not show a statistically significant result between knowledge transfer, enterprise network and management performance. Absorption capacity, as the variable affecting overseas subsidiarys management performance, should not be considered a mediating or moderating variable, but an independent variable. Since the joint venture is showing higher performance than single investment when going into the Chinese market, implication is provided for options in overseas expansion. But this research has the limitation in generalization because it is aiming at the subsidiaries of the Korean company investing in China. Therefore, it is more desirable in the future to conduct a study of the subsidiary of the Korean company entering several countries. It also has limitations in generalization, because the research was conducted using a limited number of variables, despite there are various factors affecting the management performance of Chinese subsidiaries.

혼합 측정치를 이용한 배전계통의 상태추정

윤기창(Ki-Chang Yoon),김영진(Young-Jin Kim) 대한전기학회 2022 대한전기학회 학술대회 논문집 Vol.2022 No.7

한국 벤처기업의 글로벌화 정도와 성과에 관한 연구

윤기창 ( Ki Chang Yoon ),김영래 ( Young Rai Kim ) 한국국제경영학회 2009 국제경영연구 Vol.20 No.2

국제경영 : 한국 벤처기업의 경영성과에 미치는 영향요인에 관한 연구 - 국제적 기업가정신과 기업역량을 중심으로 -

윤기창 ( Ki Chang Yoon ) 국제지역학회 2009 국제지역연구 Vol.13 No.2

This study tries to investigate the factors influenced on the performance by top management team`s(TMT`s) international entrepreneurship(IE) and firm`s capabilities(marketing capability and R&D capability) of Korean Ventures. The research model and hypothesis set that TMT`s IE directly affect to the performance directly affects and TMT`s IE indirectly affect to the performance through the capabilities(marketing capability and R&D capability) by research prior studies. To verify research model, 115 high-technology based Korean ventures survey to be as samples by structured questionnaires and the data is tested by SEM(structural equation modeling) analysis. The results of analysis are as follow. First, there was no relationship between TMT`s IE and performance. Second, the IE positively affected to firm`s capabilities(marketing capability and R&D capability). Third, firm`s internal capabilities positively affected to performance. These results only few TMT`s IE cannot sufficiently affect to performance but IE should be propagated to marketing and R&D departments and then firm`s performance can improved. This study respect to provide a meaningful implication to globalization and performance of Korean Ventures.

해상화물의 인도시기에 관한 고찰 -대법원 2009. 10. 15. 선고 2008다33818호, 2009다39820호 판결-

윤기창 ( Ki Chang Yoon ) 한국해법학회 2010 한국해법학회지 Vol.32 No.1

The delivering problems of a cargo through the maritime transport will have the important meaning in dimension of security for payment of trade money, and in special, in case that B/L(Bill of Lading) will be generated, the delivery time of a cargo will become to standard to judge the establishing time point of unlawful act to the rightful possessor of B/L together with exchange time of B/L. The delivery of a cargo will be meant the actual transfer of possession for a cargo, and therefore, to grasp the delivery time of a cargo, it will be necessary to have totally reviewed the essential element to imagine that actual possession was already transferred, and we could grasp the contents for the carrier`s duty of delivery, relations between carrier and bonded warehouse operator and contents of bonded warehouse operator`s duty to have caution. In case of oil cargo in such viewpoint, we could grasp delivery time of the oil cargo carrier since we will review whether there are any different point between the general bonded warehouse cargo and bulk cargo of transportation and custody type, and in case that the Contracting Carrier who issued the House B/L on one side, it will come to the important factor to confirm both parties between the party of bonded warehouse operator and person who has the bailment contract, and also it, especially to specialize contents of the caution duty of the man who is the actual party of the bailment contract. Accordingly, in this judicial precedent, it is to clarify the attention and obligation of the bonded warehouse operator and the carrier`s duty of delivery under reviewing propriety of the Supreme Court decision related to delivery time of the oil cargo and the cargo delivery time of the Contracting Carrier and the Actual Carrier.

외국선박 가압류 채권자의 배당 요구 적법성 -대법원 2011. 9. 8. 선고 2009다49896호 판결-

윤기창 ( Ki Chang Yoon ) 한국해법학회 2012 한국해법학회지 Vol.34 No.2

This judgment is about legality of the demand for distribution by a creditor who has affected a provisional seizure of foreign vessel. The content is, to take part in the distribution of a preceding auction procedure, whether the provisional seizure creditor needs to fulfill all requisite for commencement of an execution by Civil Execution Act or he can just claim his right in a proceeding auction procedure without a separate provisional seizure execution when the vessel, the object of provisional seizure, is already under the disposition of observation and preservation and the execution officer has received the vessel`s nationality certificate. However, there is no difference regarding procedures between the provisional seizure execution and the seizure execution to foreign vessels, and it is hard to say that a provisional seizure creditor`s right is specially protected or the right of interested parties such like owners and debtors, is violated even though the provisional seizure creditor takes part in the distribution of the vessel. Instead, there is an advantage that the participation of provisional seizure creditors in the distribution can make easy to ascertain the claims related with the foreign vessel which provide limited information about credits and debts. Besides that, it is practically impossible to make overseas service or notification to debtors before the completion period of demand after all crews send back to their countries, and it would be inconsistent with the law of equity to make the provisional seizure creditor take all disadvantage of failing provisional seizure execution because the execution of provisional seizure is under the responsibility of the court rather than the provisional seizure creditors. Considering all the reasons above, I think the following provisional seizure is in effect without separate steps when the ruling of the following provisional seizure issues and the judgment is insufficient to protect the right of provisional seizure creditors of foreign vessels. I hope the court would be more forward -looking and aggressive for the protection of the provisional seizure creditors of foreign vessels in similar cases.

국제경영 : 기술개발,네트워크 역량과 경영성과간 관계에서 국제마케팅 활동의 매개적 역할에 관한 연구

윤기창 ( Ki Chang Yoon ),김문홍 ( Moon Hong Kim ) 국제지역학회 2010 국제지역연구 Vol.14 No.2

This study researched relationship between R&D capability(TC), Network capability(NC), International marketing activity(IMA) and effect to performance of Korean globalizing INNOBIZs. In former research, they found out that TC, NC, IMA effect to performance directly. But they didn`t focus on the relationship between the variables and Korean INNOBIZs. Recently, Global environment of competition is getting more and more complicated. So even the companies develop the excellent product, the companies can not get superior performance than competitor as long as the company combine with IMA or NC. In this study, empirical analysis performed using covariance structural analysis for Korean INNOBIZs. As we know in former research, TC and IMA have a positive effect on performance directly. But NC does not have a direct effect on performance. Also we found out TC and NC intermediated by MC have positive effect on performance. This result is theoretically and practically suggestive that using the company developed NC in International IMA effect on Performance.