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아파트 규모별 하위시장과 소비심리지수의 선행성 및 인과성에 관한 연구
김구회(Kim, Gu-Hoi),김기홍(Kim, Ki-Hong),이주형(Lee, Ju-Hyung) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.4
본 연구는 주택시장 선행지표로서 주택시장 소비심리지수의 유용성을 인식하고, 서울 및 수도권 지역에서 아파트 규모별 매매시장과 아파트 경매시장이라는 하위시장에 대하여 주택시장 소비심리지수의 활용가능성을 실증하기 위해 분석 을 진행하였다. 이를 검증하기 위해 아파트 규모를 전용면적을 기준으로 소형(전용면적 60㎡ 이하), 중소형(전용면적 60㎡ 초과 ~ 85㎡ 이하), 중대형(전용면적 85㎡ 초과 ~ 135㎡ 이하) 및 대형(전용면적 135㎡ 초과)으로 세분화하여 주택시장 소비 심리지수의 선·후행성 및 인과성을 분석하였고, 다음으로 경매시장과 주택시장 소비심리지수의 선·후행성 및 인과성을 실증 하였다. 분석결과를 정리하면 다음과 같다. 우선 그랜저인과관계 분석결과 서울과 수도권의 규모별 아파트 매매시장과 전세시장에서 주택시장 소비심리지수가 인과성을 가지고 있는 것으로 나타났다. 다음으로 교차상관관계 분석을 통한 선·후행성 검증결과를 살펴보면 서울의 경우 주택시장 매매소비심리지수가 모든 규모에 있어 선행하고 있으며, 주택시장 전세소비심리지수는 대형 을 제외한 소형, 중소형, 중대형에 있어 선행하고 있는 것으로 나타났다. 수도권 시장의 경우 주택시장 매매, 전세소비심리지 수가 소형, 중소형, 중대형에 선행하는 것으로 도출되었다. 경매시장에 있어서는 주택시장 소비심리지수가 서울과 수도권 경매시장에 모두 선행하는 것으로 나타났다. The purpose of this study is to explore the causal and precedence relationships between the housing sub-market and the results of a consumer sentiment survey about the housing market. This study investigates the relationships between the survey results and an apartment deal price index by size and bidding price rate in apartment auctions by extending research related to consumer sentiment surveys. We surveyed the Seoul Metropolitan Area and analyzed the results using a unit root test, cointegration test, Granger causality test, and cross-correlation test. It was confirmed that causality exists between the survey results and apartment deal price index by size and bidding price rate, and it was also confirmed that there are correlation and precedence relationships between them.
낙동강 하류에서 수서무척추동물에 의한 정수식물의 낙엽분해
김구연(Gu Yeon Kim),주기재(Gea Jae Joo),김현우(Hyun Woo Kim),신건성(Geon Seong Shin),윤해순(Hae Soon Yoon) 한국하천호수학회 2002 생태와 환경 Vol.35 No.3
Leaf litter breakdown rates of the Phragmites australis, Ziznia latifolia and Typha angustifolia were determined at the lower Nakdong River from Nov. 1998 to Sept. 1999. The relationship between leaf litter breakdown of three and abundance of aquatic invertebrates was investigated. Aquatic invertebrates collected in the litterbags were 11 family, 11 species(mean density: 222 ind./㎡, n=792), and Chironomidae was dominant. Mean density of Chironomidae in the litterbags were different according to the aquatic plant species: Z. latifolia(180 ind./㎡, n=264) T. angustifolia(187 ind./㎡, n=264) P. australis(95 ind./㎡, n=264). The breakdown of Z. latifolia was the shortest, and that of T. angustifolia was shorter than P. australis. Overall, the breakdown rate at floating layer was faster than that of submerged layer in all of three species and differences of the breakdown rate between open bags and closed bags were not found.
서낙동강 본류 및 낙동강 둔치 습지의 수생식물 생물량 분포
김구연 ( Gu Yeon Kim ),김지윤 ( Ji Yoon Kim ) 한국하천호수학회(구 한국육수학회) 2014 생태와 환경 Vol.47 No.1
Standing crop distribution of aquatic plants in the West Nakdong River and riparian wetlands in the Nakdong River were surveyed in May, July and September, 2010. Total 25 aquatic macrophyte species (submerged: 9, leaf-floating: 3, free-floating: 5, emergent: 8) were observed during the survey periods. Distribution area of aquatic plants and proportion of submerged communities were highest in Garakchi-deung (212,032 m2, 72.7%). The distribution area of aquatic plants was highest in Phragmites australis community (421,584 m2), followed by Hydrilla verticillata-Vallisneria natans community (181,511 m2), Potamogeton wrightii-Vallisneria natans community (61,604m2), and Hydrocharis dubia community (49,709m2). Garakchideung (212,032 kg) also had the highest aquatic plant production, followed by Suanchi-deung (15,546 kg), Daedong (5,813 kg), Dunchi-do (3,963 kg), Maekdo (1,463 kg), Yeommak (571 kg), Jungsa-do (530 kg), and Shinan (300 kg). Average standing crop of the study area were 147.8±20.8 g DW.m-2 in 1988, 96.1±20.0 g DW.m-2 in 2000, and 172.6±76.1 g DW.m-2 in 2010. For a sustainable management of river habitat and food source, aquatic plant should concurrently be surveyed with river environmental variables (i.e. sediment, nutrient, flow).
김구년(Gu-Nyeon Kim) 한국비교사법학회 2007 比較私法 Vol.14 No.1
Korean Antitrust law has been issued 26 years ago. Korean Fair Trade Commission has made an effort for control of anti-competitive practices and establishment of competition on market. However, according to the number of cases handled by KFTC, we can assume that anti-competitive practices don"t decrease. Recently many Scholars think the problem lies in enforcement of the antitrust law rather than the law itself. The remarkable characteristic of Korean antitrust law is that antitrust law enforcement largely depends on administrative regulations by KFTC. Nowadays, the studies on enforcement of anti-trust law are active. In Korea, compensation for damages is sole method of private enforcement. But, this has not been used actively. To file a suit, the injuries had to go thru regulations of KTFC and it is not easy for the injuries to prove accurate damages. Those have been discussed as the reasons. Thru revision of Korean antitrust law in 2004, the process to file a suit becomes more easy. The purpose of this study is to analysis system of compensation for damages of present Korean antitrust law.<BR> But, private sue for compensation for damages is an ex post method, so to prevent damages, we need injunction. Because damages caused by illegal practices sometimes are small accounts, introduce of class action and punitive damages are also needed.
김구수(Kim Gu Su),엄영익(Eom Young Ik) 한국정보처리학회 1997 정보처리학회논문지 Vol.4 No.8
In this paper, we propose a load sharing scheme in distributed systems. In the proposed scheme, the state of each host is classified as a server or a source by its current load and, to prevent excessive state changes of each host, we used three threshold values for identifying the current state of each host. Based on the threshold values, some hosts, called brokers, manage the servers registered to them. The brokers, whose number is determined by the system utilization factor and the total number of hosts, support task migration processes from overloaded sources to lightly loaded servers. Also they can hand over the broker's role to another host when it is overloaded. Simulation studies were performed for examining the sensitivity of each system parameters such as threshold values, utilization factor, the number of hosts, and the number of brokers to the system performance indices including mean response time, mean queue length.