• Archives of Reconstructive Microsurgery
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• v.7 no.1
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• pp.54-61
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• 1998

Free vascularized fibular is the most usuful bony donor of the long bone reconstruction in reconstructive microsurgical field. It has many benifits such as very strong strut tubular bone, very reliable vascular anatomy with large vascular diameter with long pedicle, minimal donor site morbity too. In that situations of the huge long bone defects in distal femur or proximal tibia, the defective bony shape and strength of the transplanted fibular bone is not enough if only one strut of the fibula is transfered. The bony circulation of the fibula has two ways, one from nutrient artery via peroneal artery through nutrient foramen which makes endosteal arterial network inside of the fibula, another way is periosteal network through outside encircling vascular network of the bone which distributed in muscle sleeves of the fibular diaphysis. Authors modified free vascularized fibular bone graft with transverse osteotomy is made from the anterolateral aspect of the fibular shaft just distal to entry of the nutrient artery. This produces two vascularized bone struts that may be folded pararell to each other but that remain connected by the periosteum and muscle cuff surrounding the peroneal artery and veins. The proximal strut is vascularized by both a periosteal and endosteal blood supply, whereas the distal strut is vascularized by a periosteal blood supply alone. This procedure can call "doule barrel" free vascularized fibular graft. We performed 7 cases of doule barrel fashined fibular transplantation on distal femur and proximal tibial large defects. Average bone union time takes 7 months from that procedure. There were no significant bone union time differences between both proximal and distal struts. After solid union of the transfered double barrel fibular graft, there were no stress fracture in our series. We can propose double barrel free vascualized fibular graft is usuful method in that cases with very large bone defect on large long bones especially metaphyseal defects.

• Fire Science and Engineering
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• v.30 no.2
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• pp.81-86
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• 2016

Recently, frequent traffic congestion has occurred in domestic urban roads. As a solution for downtown traffic congestion in domestic urban roads, plans for great depth underground double-deck tunnels have been made. Great depth underground double-deck tunnels that have been planned for passenger cars, has the structure of a network type; the entry of vehicles is carried out in the underground space. In these network great depth underground double-deck tunnels, the cross section and the height of the tunnel are smaller than the general road tunnel, and the smoke of a fire will propagate faster than the evacuation of tunnel passengers by the action of the traffic-ventilation and casualties are expected. Therefore, in the present study, an attempt was made to prevent the delay system for fire smoke diffusion at the time of a fire in a domestic network great depth underground double-deck tunnel according to the area of the tunnel block during the operation of the delay system for fire smoke diffusion to analyze the effects of reducing the inflow velocity. When the area of the tunnel block was not less than 50%, the effect of reducing about 21% of the wind speed acting on the tunnel was significant. If the area is more than 50%, the diffusion rate of fire smoke was reduced by approximately 21%, which will be useful for a safe evacuation.

• 한국전산유체공학회:학술대회논문집
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• 2009.04a
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• pp.1-8
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• 2009

This is a short review of how CFD contributed to hypersonic flights in the past 50 years. Two unexpected phenomena that occurred in the entry flights of the Apollo and Space Shuttle made us aware of the impact of the high temperature real-gas effects on hypersonic flights: pitching moment anomaly of up to 4 degrees, and radiation overshoot behind a shock wave. The so-called two-temperature nonequilibrium model was introduced to explain these phenomena. CFD techniques were developed to accommodate the two-temperature model. Presently, CFD can predict trim angle of attack to an accuracy of about 1 degree. A concerted effort was made to numerically reproduce the experimentally measured flow-field over a double-cone. As yet, perfect agreement between the experimental data and computation is not achieved. Scramjet technology development is disappointingly slow. The phenomenon of ablation during planetary entries is not yet predicted satisfactorily. In the future, one expects to see more research carried out on planetary entries and space tourism.

• Proceedings of the Korea Association of Information Systems Conference
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• 1997.10b
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• pp.171-204
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• 1997

원가 및 관리회계분야에서는 이미 선진국을 중심으로 활동개념을 도입한 활동기준 원가 계산(ABC : activity-based costing)이 성공적으로 도입·운영되고 있다. 하지만 국내외 적으로 재무회계분야에서는 전통적으로 복식부기시스템(double-entry bookkeeping system)에 지나치게 편중되어 있어서 회계정보의 산출과정에서 여러 가지 제약을 받고 있 는 것도 사실이다. 이러한 문제점을 개선·보완하기 위해서 재무회계 분야에도 활동개념을 도입했는데, 이것이 바로 활동정보회계(AIA : activity information accounting)이다. AIA는 기업의 활동이 발생하는 즉시 복식부기처리과정을 거치지 않고 활동과 대응가치의 처리방법 을 통해 실시간으로 회계정보를 생산하며, 기업의 모든 부서가 정보를 즉시 공유하고 교류 함으로써 기업유기체를 가능케 하는 새로운 회?리방법론이다. AIA의 개념을 구현하기 위해 이스턴컨설팅(주)에 의해서 개발된 활동정보회계시스템(activity information accounting system)은 복식부기시스템을 전면 부정하기 보다는 이를 점자 개선하고 보완하려는 의도에 서 개발된 종합회계처리프로그램이며, 따라서 복식부기의 모든 회계처리과정을 누락시키지 않으면서도 다양 회계, 관리 및 경영분석보고서를 제공해준다.

• Journal of Advanced Marine Engineering and Technology
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• v.28 no.2
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• pp.376-381
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• 2004

A rig was constructed to test the performance characteristics and compare the hydraulic forces exerted on a centrifugal type artificial heart impeller. A conventional shaft. seal and bearing system. while driven by a small electric motor. supported the impeller which was separated from the pump casing by a six degree of freedom force transducer (JR3 Ine). Radial (x. y) and axial (z) hydraulic forces were recorded and compared. At physiological operating conditions. the results indicate that the double entry/exit centrifugal pump encounters a smaller radial force and significantly reduced axial thrust. These experimental results are valuable in the design of a magnetic bearing system to suspend the impeller of a centrifugal artificial heart pump. This experimental technique may also be applied to evaluate the required capacity and predict the lifetime of contact bearings in marine pumps.

• The Bulletin of The Korean Astronomical Society
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• v.44 no.1
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• pp.85.2-85.2
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• 2019

We developed a new grid-based Monte Carlo code to trace far UV He II line photons that are incident on a thick H I region and subsequently transferred through Rayleigh and Raman scattering with atomic hydrogen. In particular, we consider a neutral region that is moving away from the He II emission source which is either monochromatic or is described by a Gaussian profile. The resultant Raman scattered He II line profiles from a monochromatic source are characterized by a double peaked core part with an extended Raman red tail that is attributed to multiple re-entry events. Complicated behaviors are observed in the case of a Gaussian He II source including the formation of a secondary red peak near the Balmer center dependent on the H I column density. A preliminary application of our results to the CFHT data of the planetary nebula IC 5117 is presented.

• Journal of architectural history
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• v.22 no.4
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• pp.35-44
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• 2013

This paper looked into the structure of and changes in the building process of Gijang mountain fortress and its receiving reservoir by analyzing data from an excavation investigation. The structure of the receiving reservoir may be classified into a flat form, stone sheath, floor facility, wall facility, and entry and exit facility. The flat form of the Gijang mountain fortress and receiving reservoir is round. Concerning the sectional form, the wall was obliquely excavated in the trapezoid. As a stone sheath building method, it was built by undertaking a range work of oblong stone materials in a clockwise direction on a stamped soil floor. Then, it was treated with stamping using double layers of gray clay and yellowish brown clay on the floor and the wall. Also, in a space between the stamped layers on the floor, herbal plants and a straw mat were laid for waterproofing as well as to prevent sinking. As an entry and exit facility, two facilities were confirmed symmetrically in the southeast and in the northwest. It is believed that they were built additionally during rebuilding after the initial construction. The building process was revealed to have been carried out in 8 stages. Given the structure and excavated remains, the building period is estimated to be the early to mid 7th century for the initial building, the later 9th to 11th centuries for the primary rebuilding, and the later 16th to early 17th centuries for the secondary rebuilding.

• Journal of Korean Library and Information Science Society
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• v.9
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• pp.1-31
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• 1982

A library catalog is most important finding tool to a library collection. This tool should be so designed as to enable users to handle with ease and convenience. Library catalog use study is necessary in order to identify the demands made on the catalog by its actual users and to measure the adequacy with which the catalog is meeting these demands. Many major catalog use surveys were performed by means of questionnaire and interview, but these methods are so difficult and perverse that the results of catalog use studies might often be far from scientific precision. The aim of this paper is to seek the guidelines with which one might assist the catalogers in providing an effective library catalog for their patrons. In order to get the first-hand information an actual survey was undertaken on searching behavior at the catalog of Jeonbug National University Library from November 30 to December 5, 1981 and from May 17 to May 22, 1982. The results of the survey can be summarized as follows: 1. Most of the students (79.77%) use the library. 2. Most of the library patrons (74.52%) use the public catalog as the searching tool to the library collection. 3. 67.85% of the catalog users are interested in searching materials written in Korean, Japanese, and Chinese. 4. 72.86% of the catalog users are interested in searching known items at catalog. 5. In known item searching, 49.44% of the catalog users choose title entry. 6. 20.17% of the catalog users are interested subject searching at the catalog. 7. Reference card is not utilized in searching. 8. For the translated items users want double entries in both vernacular and Korean. 9. At current catalog description, author, title, call number, translator, publisher and joint author are useful entry. Edition, author's date of birth and death, illustrative, size of book and bibliographical notes are not much utilized. 10. 55.39% of the catalog user need systematic guidance on how to use the library catalog and collection.

• Journal of Convergence for Information Technology
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• v.8 no.1
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• pp.123-130
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• 2018

The subjects of this study were municipal citizens of Gyeongsangbuk-do Province and selected 250 members of the sports clubs as members. The sampling method for the data was used with simple ramdom sampling method, self-administration method. After questionnaire was distributed and retrieved, a total of 200 questionnaires were analyzed except for 50 items which were judged to be lack of credibility (double entry, no entry, insufficient data). For the data analysis, frequency analysis, ${\chi}^2$, factor analysis, reliability analysis, and one-way ANOVA were conducted in this study. First, there was no significant difference in life satisfaction among the participants. However, there was a significant difference in leisure satisfaction according to age. Second, there was a statistically significant difference in the life satisfaction of the athletes according to educational background, and there was a statistically significant difference in leisure satisfaction according to educational background.

• Journal of the Korean Institute of Landscape Architecture
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• v.29 no.1
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• pp.41-50
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• 2001

The seoul Metropolitan Government has announced a program of the realization of a Korean garden named 'Seoul Park' in Paris 'Jardin d'Acclimatation' in June, 2000. The program for 'Seoul Park' in Paris has double objectives which aims celebrating the 10th anniversary of the establishment of sisterhood relationship between Seoul and paris and to promote the mutual cooperation and the amity between the two metropolitan cities. The purpose of this study is focusing on the issues on the setting procedure of characteristics of the 'Seoul Park', type of the Park, and design realization of expression of Korean identity, and the cultural consolidation between parks in Korean and French. The Seoul Park will be constructed on the shore of a lake of the Jardin d'Acclimatation, and the size of the area is 4,675㎡. In July, a design competition for the preparation of a schematic plan of the Seoul Park was held in Seoul. In this competition, the author won with a scheme which proposed a Korean Garden as expression of "between" two cultures which is fitted into the French environment. Although, the Seoul Park in Paris is a small Korean garden, its significance would be emphasized in terms of that it represents the adaptation of a Korean culture to the French territory. Throughout the winning entry, we could recognized hat the author defines Korean garden as 'time device', and 'Seoul Park' as 'Situation' which is the consolidation of the cultures between korea and France. And also the author pursued Korean garden as a net type of 'sequence of the event'. In this paper, we have discussed the concept and the schematic plan of the winning entry. focusing on following issues: Definition of the garden; Form of the garden; Expression of Korean garden; Representation of the reconciliation between two environments. Since many parts of the garden are under designing, and the discussion on the resetting of the existing trees in the garden is in progress, more specific investigation will be done in the next thesis.