• 한국축산시설환경학회지
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• 제10권1호
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• pp.23-28
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• 2004

본 연구는 국내의 있는 무창 분만ㆍ자돈사에 대하여 환기시스템 정립의 기초자료를 수집하고자 수행하였다. 측벽상단입기 지붕굴뚝배기, 천공천장입기 지붕굴뚝배기, 측벽덕트입기 지붕굴뚝배기, 측벽덕트입기 측벽배기의 4종류 무창분만ㆍ자돈사 환기 형태에 대하여 조사하였다. 겨울철 돈사 내 온도, 습도, 공기유속, 암모니아가스 농도의 환경상태를 조사하였다. 겨울철 각 환기 형태별 돈사 내 온도는 환기형태에 따른 온도의 차이는 없었다. 공기유속은 측벽덕트입기 측벽배기가 다른 환기 형태보다 높은 공기 유속이 있었다. 돈사 공간내 각 환기형태별 공기유동은 측벽덕트입기 지붕굴뚝배기, 측벽덕트입기 측벽배기 환기형태가 비교적 다른 환기 시스템에 비교하여 원활한 공기유동이 있는 것으로 나타났다. 암모니아(NH$_3$) 농도도 다른 환기형태보다 측벽덕트입기 측벽배기가 낮은 경향을 보였다. 따라서, 측벽덕트입기 지붕굴뚝배기, 측벽덕트입기 측벽배기가 국내의 무창 분만ㆍ자돈사 환기방식에 적용할 수 있을 것으로 판단되었다.

• East Asian Economic Review
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• 제17권1호
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• pp.55-79
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• 2013

The objective of this article is to explore the economic relationship between China and the surrounding dynamic Asian economies. It delves into China's influence over the Asian economies and whether this relationship is a market-led or de facto symbiosis. The three principal channels of regional integration analyzed in this article are trade, FDI and vertically integrated production networks. They are essentially based on the activities of the private-sector in these economies. China methodically expanded and deepened its economic ties with the regional neighbors. At the present juncture, China's integration with the surrounding Asia is deep. Another issue that this article explores is the so-called China "threat" or "fear" in Asia. It implies that China is crowding out exports of the other Asian economies in the world market place. Also, as China has become the most attractive FDI destination among the developing countries, it is apprehended that China is receiving FDI at the expense of the Asian economies. These concerns were examined by several empirical studies, and the inference is that they are exaggerated. This article concludes that the private-sector business activities in China and other rapidly growing Asian economies were (and are) instrumental in bringing together the production structures and real economies. The result is both convergence and integration among the dynamic Asian economies. Over the years China and its Asian neighbors has developed a close and symbiotic economic relationship and a de facto regional integration.

• 한국정밀공학회지
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• 제27권11호
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• pp.92-97
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• 2010

The object of this study is to investigate the definite method for pitting damaged surfaces. Pitting is a sort of fatigue damages and it is made by a repetitive load. For a judgment between damages or not, sensing vibrations of test equipment is simple. However, it is not only difficult to observe a growth of pitting but also impossible to detect the juncture of initial pitting. Therefore, a method for the pitting damaged area measuring technique was effectively implemented by Two Roller Machine. The change of surface damaged area was measured by an optical microscope in regular time and calculated by the use of dark and bright ratio of test specimens' pictures taken by optical microscope. In conclusion, S - N Curves gained by Failure rate - Cycle graph was led and the curves are able to be chosen as occasion demands for a failure area percentage.

• 대한조선학회지
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• 제3권1호
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• pp.19-24
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• 1966

The maximum shear stress distribution in a stiffening flat attached to a plat undergoing a single tensile force has been investigated by photoelastic method. In the experiments a photoelastic model, as shown in Fig. 1, has been studied in the fields of a polariscope, as shown in Fig. 2. Fig. 3 shows the isoclinics and Fig. 4 and 5 are stress trajectories of the principal stresses and maximum shear stresses, respectively. Fig. 6 is the isochromatics in light field. The maximum shear stress at each point in the stiffener were determined from the isochromatics in both of light field of light field and dark field. Then the maximum shear stresses were divided by the average shear stress in the model, to obtain the ratio ${\tau}max/{\tau}av$ at each point. Finaly the variations of the ratio ${\tau}max/{\tau}av$ along the horizontal and vertical lines in the stiffener have been plotted, as shown in Fig. 7 and 8. The conclusions reached in this investigation are as follows: (1) The shear stresses transmitted to the stiffener through the juncture are concentrated on the end portions. (2) The maximum shear stress at the ends of the stiffener reaches to about 4 times of average shear stress. (3) The irregularities in the stress distribution are restricted in the end portions of the stiffener.

• 한국콘텐츠학회논문지
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• 제2권4호
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• pp.67-75
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• 2002

최근 지식기반사회에 접어들면서 정보의 양은 폭발적으로 증가하고 있으며, 인터넷과 디지털 컨텐츠의 확산으로 인해 정보의 접근성 또한 매우 향상되었다. 이로 인해 세계적으로 방대한 정보의 체계적인 관리와 효율적인 분석이 큰 이슈가 되고 있다. 또한, 정보의 패러다임이 정보의 접근시대에서 정보의 분석시대로 전환되고 있으며, 이에 대비하여 기술정보를 통한 기술트렌드의 분석과 이를 시스템적으로 구현하는 방법의 정립이 시급한 실정이다. 따라서, 본 연구에서는 기술정보 DB의 검색결과를 온라인상에서 시스템적으로 신속하게 분석함으로써 연구개발 및 기술개발의 방향설정에 기여하며 정보수집 및 분석에 소요되는 노력과 시간을 획기적으로 단축시킬 수 있는 정보분석시스템을 개발하였다.

• 무역상무연구
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• 제18권
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• pp.65-104
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• 2002

With the current evolution from paper to electronic records the documentary credit market has been looking to ICC to provide guidance in this transition. To allow bankers and traders to familiarize themselves with this trend, eUCP has come into force from April 1st 2002. The eUCP provides definitions to allow current UCP terminology to accommodate the presentation of the equivalent of paper documents electronically and to provide necessary rules to allow the UCP and eUCP to work together. It is important to understand that many of the Articles of the UCP are not impacted by the presentation of electronic equivalent of paper documents and do not require any changes to accommodate electronic presentation. When read together the UCP and the eUCP will be broad enough to allow for developing practice in this area. The eUCP is not a revision of the UCP. The UCP will continue to provide the industry with rules for paper letters of credit in conjunction with the eUCP. This study comments that some characteristics of the eUCP have unique properties, such as juncture, envelope, homotheticity functions, and some applicable interpretations including abstraction of letter of credit, notice of completeness, notice of discrepancies and corruption of electronic records.

• 디자인학연구
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• 제11권1호
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• pp.1-10
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• 1998

중세 유럽에서는 각 지방의 귀족들이 지배하는 독특한 문화와 풍토 속에서 코치빌더에 의해 지역 특색이 나타나 있는 개성 있는 형태의 마차가 제작되었다. 이러한 마차는 구동수단으로써 엔진이 장착되어진 초기 자동차가 등장하는 시기의 차량 형식에 커다란 영향을 미치게 된다. 이후, 가솔린 엔진의 보급으로 자동차는 크기와 무게에서 유연성을 갖게 되며, 성능과 디자인 측면에서 급속한 발전을 가져왔다. 초기 자동차 제작이 시사하는 중요한 점은 기능에 대한 순순한 접근과 시대성을 표현하는 스타일링의 단계적 진보를 이루었다는 것이다. 이러한 발전과정이 배경에는 관련 산업의 진보와 함께 각 지역의 사회적 영향이 자동차의 형태에 반영되어 왔음을 알 수 있다. 본 연구는 대량 동력 화(mass-motorization)된 현대 사회에 있어서 자동차에 대한 무한한 요구와 다양화를 추구하는 시점에서 시간의 영속성과 자동차 디자인이 취해야할 본위를 재고해 볼 수 있는 계기로 삼아보는데 그 의의를 두었다.

• 한국태양에너지학회 논문집
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• 제35권2호
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• pp.53-62
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• 2015

Boiling heat transfer characteristic is very important in the various industries such as solar thermal system, power generation, heat exchangers, cooling of high-power electronics components and cooling of nuclear reactors. Therefore, in this study, boiling heat transfer characteristics such as critical heat flux (CHF) and heat transfer coefficient under the pool boiling state were tested using graphene nanofluids. Graphene used in this study, which have the same thermal conductivity but with different sizes. The experimental results showed that the highest the CHF and boiling heat transfer coefficient increase ratio for graphene nanofluids was at the 0.01 vol.%. At the present juncture, the CHF and boiling heat transfer coefficient increase ratio of the small-sized graphene nanofluids was higher than the large-sized graphene nanofluids.

• 한국실내디자인학회논문집
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• 제19권1호
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• pp.137-147
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• 2010

The purpose of this study is to research a method of creating a new type of boundary by repeated disposition of single unit of modularized membrane successively. In the contemporary architectural indoor space, more highly dimensional analysis of boundary is required and the necessity of establishing boundary of a new concept that may satisfy cultural value, social value and artistic value as a whole as well as aesthetic and functional merit has been increased. In order to create a membrane that may fulfil the requirements of the diversified programs of space like this, an approach of complicated mechanism and high-dimensional calculation are required. At this time, digital GA modelling, parametric modelling technique may expand its range of possibility. One thing to be noted at this juncture is that indefinite expandability involved in digital modelling technique, modelling by grid of absolute and relative coordinates and convenience of systematization may surpass limitation of analogue or simple numerical calculation being progressed in the past. And in order to create solid process including unit modelling or pattern formation, Precise calculation process of computer is necessitated inevitably.

• World Technopolis Review
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• 제1권2호
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• pp.92-106
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• 2012

This study focuses on exploring the behaviours of high-tech start-up firms in response to the policy interventions undertaken to promote regional innovation in South Korea since 1997. High-tech start-ups and their technological entrepreneurship are increasingly considered by policy makers and academics to play a crucial role in the generation of innovation and economic development. However, this study started from a basic concern of why government intervention does not necessarily result in an increase of regional innovation capacity. To explain this concern, we constructed a new conceptual framework of 'government dependency' and apply this to 'Daedeok,' a regional innovation system in South Korea, to explore the reproduction of path dependency as an impact induced by innovation policy. This conceptual framework was developed by remodeling path dependency approaches through a systemic and interactive lens. An empirical study used qualitative interviews of start-up founders to delineate the emergence of a new development path and the extent to which dependency was reproduced in the Daedeok regional innovation system. Empirical analysis suggested that 'reliance' and 'persistence' were the crucial factors in the production and reproduction of the government dependency. Some firms accepted dependency as reliance, but others regarded it as policy utilization. Thus, a critical juncture could not be clearly identified in actors' behaviour. It was also unclear if dependency had hindered innovation, but it was shown that the regional and institutional contexts strongly influenced the reproduction process. The study concludes that the construct of government dependency can also provide useful insights into policy learning as well as the success of government interventions.