• 대한골관절종양학회지
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• 제8권3호
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• pp.90-95
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• 2002

42세 남자 환자가 우측 족관절부에 4개월 동안 증가하는 동통 및 종괴를 주소로 내원하였다. 단순 방사선 소견 및 전산화 단층 촬영 소견상 우측 거골 경부의 골내부 및 피질골 파괴소견을 보였다. 병리소견은 고악성도의 골형성 골육종이었다. 두 사이클의 수술전 항암치료에도 불구하고, 족관절부의 종괴는 커졌고 폐전이로 진행되었다. 원발 병소에 대하여 슬관절하 절단, 폐전이에 대하여 쐐기모양 폐 절제술을 실시하였고 수술후 항암치료를 시행하였으나 수술후 10개월에 폐전이로 환자는 사망하였다.

• 한국전산구조공학회논문집
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• 제21권4호
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• pp.307-315
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• 2008

PPS(Post-tensioned Precast concrete System)공법은 U자형 PC로 제작된 넓은 보와 PC또는 현장 타설 콘크리트로 제작한 기둥으로 구성되며, PC보와 기둥의 일체성 확보를 위하여 프리스트레스를 도입하였다. 본 연구에서는 포스트텐션을 도입한 넓은 보-기둥 접합부의 구조적 특성을 규명하고, 다양한 변수해석이 가능하기 위한 자료를 제공하고자 유한요소해석 프로그램인 ANSYS을 사용하여 비선형 해석을 수행하였다 콘크리트에 대한 해석요소는 8개의 절점을 가지며 각 절점이 3개의 자유도(X, Y, Z축에 대한 병진 변위)를 갖는 Solid 65요소를 사용하였다. Solid 65요소에서 전단전달계수(Shear-Transfer factor)는 실험값에 근사적으로 해석값을 맞추기 위한 영향 계수값으로 균열이 발생하는 위치에 대한 전단강도의 감소를 반영한다. 그 결과, 본 실험체에 대한 해석에서는 열려진 전단전달계수 0.125와 닫혀진 전달계수 0.85에 기초하여 해석한 결과 닫혀진 전단전달계수는 0.85에서 열려진 전단전달계수에서는 0.2일때 가장 실험값에 근사한 해석치를 보였다.

• 대한족부족관절학회지
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• 제7권2호
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• pp.250-257
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• 2003

Purpose: Pilon fracture is caused by high energy and axial compression forces, and it is often associated with severe comminution and soft tissue injury. Recently, limited internal fixation of this fracture may avoid the soft tissue complications associated with formal open reduction and internal fixation and avoid incongruity of joint margin associated with conservative treatment. We have treated Ovadia and Beals type II or III pilon fracture with limited internal fixation and the results were satisfactory. Materials and Methods: We analyzed 15 cases of Ovadia and Beals type II or III fractures who were treated by limited internal fixation(K-wire or screw fixation) from January 1995 to December 2000. The average follow up period was 20 months(range, 12 to 38 months). According to the Ovadia and Beals classification, seven cases were type II, and eight cases were type III. Radiographic results were assessed by Ovadia and Beals criteria. We also assessed the functional results by Mast and Teipner criteria. Results: Radiographic results showed good in 67% and fair in 33% of cases. Clinical results showed good in 73% and fair in 27% of cases. There were no complications such as wound infection and skin necrosis, but traumatic arthritis were 2 cases. Conclusion: Pilon fractures are high energy injuries with significantly associated soft tissue damage and traumatic arthritis. Limited internal fixation offers good solution to Ovadia and Beals type II or III fracture.

• 한국의상디자인학회지
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• 제19권3호
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• pp.193-206
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• 2017

The Seongsu handmade shoes street consists of subsidiaries, leather shoe manufacturers, and shoe stores associated with the business as a domestic shoe business cluster. Since its development in the 1980s, the shoe industry has been a center of shoe manufacturing but since the 2000s, it has lacked a fully developed environment, a uniform distribution system, market-oriented brand, marketing and design, and also suffers from an aging workforce. Seoul officials and Seongsu-dong small business owners must overcome these difficulties through town enterprise development, brand creation and marketing co-promoting composition of the characterization and distance, but the situation is still insignificant. The purpose of this study is to determine the actual situation as targeted at small merchant handmade shoes Seongsu-dong Street, to determine the factors in the problem, and to propose substantial improvements for Seongsu handmade shoes street. This study was a survey of street sales outlets in Seongsu handmade shoes street in Seoul. The spatial extent of the study was to set up the scope by reference to the directions given through the Seongsu handmade shoes street site. To build infrastructure facilities and distribution systems for the betterment of handmade shoes Seongsu-dong street, it is important to gain a competitive edge through a specialized industry such as a marketing strategy to establish branding as a specialized company. Shoemakers should also seek their own activation measures in areas such as training professionals, universities and corporate projects for joint participation in the ongoing development of new content. To pioneer the domestic and international sales channels, it is important to broaden the sales infrastructure. These areas will ultimately enable a significant contribution to strengthening national competitiveness.

• 대한영양사협회학술지
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• 제23권3호
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• pp.240-262
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• 2017

This study examined the experience of administrators of home-based child care centers about CCFSM (Center for Children's Foodservice Management) service using a qualitative approach. Eight administrators of home-based child care centers in Seoul with more than one year's experience of CCFSM were interviewed regarding their opinions on support activities, standards, and foodservice management. The interviews were semi-structured with open-ended questions and they were transcribed and classified according to the subjects. There were negative opinions regarding the indications after a hygiene inspection leaving photographs or records behind, but most positive opinions were about round visits for foodservice sanitation and nutrition management. The participants thought that it is not enough that the number of nutrition education sessions for children be twice a year, and there was a suggestion to increase the rentals of nutrition educational materials. There was a complaint about the menus in that were difficult to prepare for lunch time or to obtain food ingredients for. The administrators poorly recognized how to use the standardized recipes and chlorine-based disinfectants, so they could not be applied properly. They also pointed out the problems of joint purchasing as low quality and high prices in the food service operation. They felt discriminated against compared to with larger scale child care centers because of their size and expressed concerns regarding the fact that many home-based child care centers were not included due to the lack of publicity and budget. Through the results, the CCFSM should provide a differentiated service and management by creating a dedicated team or staff for home-based child care centers so they will not feel left out. In addition, It is also important to constantly gather opinions to improve the menus and to use standardized recipes practically. In addition, it will be necessary to develop nutrition educational materials corresponding to the infants' age for home-based child care centers and increase the rent to expand nutrition education.

• 제어로봇시스템학회논문지
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• 제6권1호
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• pp.73-80
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• 2000

The stewart platform manipulator proposed by stewart is the parallel manipulator which is composed of several independent actuators connecting the upper plate with the base plate and capable of executing a six degree of freedom motion. The manipulator has a structure of a closed loop form, and provides better load-to-weight ratio and ratio and rigidity than a serial manipulator with an open loop form. Moreover, the manipulator has high positional accuracy because position errors of actuators are not additive. Because of these advantages, this manipulator is widely used in many engineering applications such as a driving simulator, a tool of machining center, a force/torque sensor and so on. When this Stewart platform manipulator is controlled in joint space, it is difficult to design a controller using an analytic method due to nonhnearity and unknown parameters of actuators. Therefore, a PID controller is often used because of easiness in applications. To find the PID control gain, a trial-and-error method is generally used. This method is time-consuming, and does not guarantee a optimal gain. Thus, this paper proposes a GA-PID controller which selects an optimal PID control gain using genetic algorithms. And this proposed controller is evaluated experimentally and shows acceptable performance.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제31권6호
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• pp.532-535
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• 2005

The objective of this study is assessment of the efficacy of upper joint space arthrocentesis on prevention of TMJ injury from patient with mantibular fractures. We divided the patients into two groups, one which consist of 24 patients who are taken arthrocentesis while open reduction of mandibular fracture, the other which consist of 27 patients without arthrocentesis from Jan 1999 to Dec 2001. We measured maximum mouth opening, excursive movement range respectively one week, one month, three months later after operation. The patients were instructed to mark on 10 cm VAS for evaluation of TMJ pain during resting, mouth opening, and mastication. We evaluated the signs and symptoms of temporomandibular disorder clinically and radiographically 6 months later. The result of this study is that there is a reduction of pain and increase of range of mandibular motion in both groups but in patients with arthrocentesis there is relatively reduction of pain and increase of range of mandibular motion compared with control group. On the points of 6 months later, temporomandibular disorder occurred in 4 patients (16.7%) in group with arthrocentesis and 13 patients (47.1%) in control group. In conclusion, we think that supplemental therapy such as arthrocentesis is helpful for the recovery of jaw function and prevention of the development of temporomandibular disorder after facial trauma.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 International Symposium on GPS/GNSS Vol.2
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• pp.3-8
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• 2006

The next decade promises drastic improvements and additions to global navigation satellite systems (GNSS). Plans for GPS modernization include a civilian code measurement on the L2 frequency and a new L5 signal at 1176.45 MHz. Current speculations indicate that a fully operational constellation with these improvements could be available by 2013. Simultaneously, the Galileo Joint Undertaking is in the development and validation stages of introducing a parallel GNSS called Galileo. Galileo will also transmit freely available satellite navigation signals on three frequencies and is scheduled to be fully operational as early as 2008. In other words, a dual system receiver (e.g., GPS+GALILEO) for general users can access six civil frequencies transmitted by at least fifty eights navigation satellites in space. The advent of GALILEO and the modernization of GPS raise a lot of attention to the study of the compatibility and interoperability of the two systems. A number of performance analyses have been conducted in a global scale with respect to availability, reliability, accuracy and integrity in different simulated scenarios (such as open sky and urban canyons) for the two systems individually and when integrated. Therefore, the scope of this article aims at providing the technical benefits analysis for Taiwan specifically in terms of the performance indices mentioned above in a local scale, especially in typical urban canyon scenarios. The conclusions gained by this study will be applied by the Land Survey Bureau of Taiwanese as the guideline for developing future GNSS tracking facilities and dual GNSS processing module for precise surveying applications in static and kinematic modes.

• 한국실내디자인학회논문집
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• 제25권3호
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• pp.90-101
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• 2016

The Homeshare program, which was introduced in 2012, has been implemented with the purpose of reduction of housing costs for young students and economic support for the senior to prevent isolation and help themselves. Nonetheless, the program has not being activated and the research about it has not progressed well. Therefore, this study as a basic research of the program aims to analyze and evaluate the program in progress in district offices to push it forward. This study was undertaken on documentary research and interviews, which analyzed advanced researches and open materials from the websites of district offices. The interviews were conducted in 4 gu-district offices (Nowon-gu, Gwangjin-gu, Seodaemun-gu, and Seongdong-gu) and did interviews with officials in charge on July in 2015. The result of this study is as follows. First, the Homeshare is being activated around the university town, which has advantage of housing welfare aspects for young students and social welfare aspects for the senior. Second, the support structures of the Homeshare can be categorized as the gu-districts offices, local resources and different structures funded by the Seoul City. Third, the process of the Homeshare takes 5 steps consisted of advertisement, reception/counseling, matching, contract, follow-up management. Fourth, the matching makes it a rule to match the same gender considering safety. In the case of the participation of the official in charge, it has a advantage of solving problems that can occur when the matching, which can lead to smooth progress. Fifth, joint consultation is divided into the contract among participants and the contract between participants and the gu-district office. Sixth, the follow-up management takes rather passive approaches such as calls once or twice a month and visits when necessary. For the activation of the Homeshare, it is required to improve it through the various methods such as regular visits, satisfaction researches and so on. This study resulted from investigating and analyzing the Homeshare operation system between generations will be considered to be a reference to the underlying management.

• 한국콘텐츠학회논문지
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• 제19권3호
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• pp.223-235
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• 2019

본 연구는 ZMET을 이용하여 한국 꽃꽂이교육 관광콘텐츠 설계 및 마케팅 전략 도출을 위한 방한 중국인 관광객의 참여동기 파악에 목적을 두고 있다. 꽃꽂이교육 관광콘텐츠에 참여한 10명의 방한 중국인 관광객을 대상으로 한 조사 결과, '성취감을 얻는', '한국문화를 탐방하는', '선생님의 서비스가 좋은', '전문성이 강한', '함께 하는', '함께 교류하는', '함께라서 든든한', '중국에서 없는', '중국보다 좋은', '치유되는', '행복과 사랑을 느끼는', '예술적인 접근이 쉬운', '인생샷이 기록되는', '인테리어가 예쁜', '디자인이 특별한', '설레고 기대되는', '자연과 가까워지는', '일상을 예쁘게 장식하는' 18개의 참여동기 구성개념이 도출되었고 이를 연관시켜 도출된 공유개념도의 핵심 구성개념은 '성취감을 얻는', '한국문화를 탐방하는', '선생님의 서비스가 좋은', '전문성이 강한' 4개이다. 이를 바탕으로 향후 한국 꽃꽂이교육 관광콘텐츠의 설계 및 마케팅 전략에 있어 난이도 조절이 가능한 커리큘럼 개설, 방한 중국인이 선호하는 부가적 한국문화 체험 기회제공, 플로리스트의 다각도 자기개발 등이 필요하다는 것을 확인하였다.