NEMO와 결합된 Hierarchical Mobile IPv6에서 멀티캐스팅을 이용한 핸드오프 지원 기법

노경택(Rho Kyung_Taeg) 한국컴퓨터정보학회 2004 韓國컴퓨터情報學會論文誌 Vol.9 No.3

본 논문은 이동 단말(mobile Node)의 핸드오프 발생시 끊김없는 핸드오프(seamless handoff)를 지원하기 위한 기법을 제안하고자 한다. 신호세기의 감소로 인한 핸드오프가 발생 가능한 상태일 때 이동단말은 기존의 CoA(Care-of Address) 외에 감지되는 신호를 통한 새로운 nCoA들을 만들어 자신의 영역을 담당하는 MAP(Mobility Anchor Point)에게 이들 nCoA에 대한 일시적인 바인딩 업데이트 tempBU(temporary Binding Update) 메시지를 보낸다. MAP은 전달받은 새로운 nCoA 주소를 포함한 바인딩 업데이트 메시지를 받아서 기존의 바인딩 정보 외에 새로운 바인딩 정보를 일시적으로 바인딩 캐쉬에 저장한다. 결국 이동단말이 새로운 액세스 라우터(nAR) 영역에 진입하여 확정된 바인딩 업데이트 메시지를 보낼 때까지 멀티캐스팅을 함으로써 끊김없는 핸드오프를 보장하는 기법을 제시한다. This paper proposes a seamless handoff scheme that enables a mobile node to continue a session when moving to an overlapping area. During handoff due to the weakness of signaling, mobile node makes new Care-of Addresses using signals received from access router when MN reaches the edge of its area in addition to its current CoA, and it sends temporary binding update messages to Mobility Anchor Point which manage the area covering MN. MAP receives that binding update messages from MN, and temporarily stores new binding informations from them to its binding cache besides existing binding information for MN. This scheme ensures a seamlessly handoff using multicasting until MN enter a new access router area and sends a confirmed binding update message to MAP.

낙상으로 인한 좌심실 파열 후 생존한 환자 1례

배택환,김행재,정윤석,김준식,조준필,이철주 대한응급의학회 1995 대한응급의학회지 Vol.6 No.1

Blunt or nonpenetrating chest injuries are common after motor vehicle accidents or falls. Blunt injury to the heart ranges from contusion to rupture. Cardiac rupture, however, is un-common and associated with a very high mortality rate ; left ventricular rupture due to falling is even more rare. We experienced a case of left ventricular rupture of the heart caused by a fall, which the patient survived. A 63-year-old man fell off a ladder and presented with hypotension from left hemothorax and pericardial tamponade. The hemothorax was relieved via an emergency closed thoracostomy but dyspnea and hypotension continued. And so, echocardio-graphy was done and pericardial tamponade was detected. Emergency left thoracotomy was done to repair the rupture site. We believe that patients with cardiac rupture who reach the hospital alive can often be saved by prompt diagnosis and immediate surgical treatment.

스탠리~ 라이슨너 환의 베티수에 관한 고찰

張澤相 群山大學校基礎科學硏究所 1998 基礎科學硏究 Vol.13 No.-

△을 Vertex집합 V상의 simplicial complex라 하고 K[△]을 K상의 Stanley-Reisner환 이라 할 때 K[△]의 minimal free resolution에서의 2차 베티수에 관하여 고찰하였고 ideal I△가 {xi₁, xi₂, ....xi}? △으로 제곱없는 단항들 xi₁, xi₂....xir, 1 i₁<i₂...<ir v에 의하여 생성된 경우 2차 베티수는 K와 독립적임을 보였다. Let △ be a simplicial complex on the vertex set V and K[△] Stanley-Reisner ring of △ over a field K. We study the second Betti numbers which appear in a minimal free resolutions of K[△]. When the ideal I△ is generated by square free monomials xi₁, xi₂....xir, 1 i₁<i₂...<ir≤ν with {xi₁, xi₂, ....xir}? △, we show that the second Betti numbers do not depend on field K.

호텔관리자 리더십모형 분석에 관한 연구

남택영 한국관광정책학회 2002 觀光政策學硏究 Vol.8 No.1

The purpose of this study was to built the model of the Management Leadership who has positive and progressive mind which broke from the self-righteousness of Hotel Owner and conventional leadership in hotel management that was fragmentary, passive and inefficient. The findings of this analysis model were as follows ; First, four factors was extracted from Factor Analysis which are the job condition of employee, communication and job understanding, employee salary, employee authority commission in the part of the hotel employee management, the standardization of regulation and job, product suitability in the part the inside condition of hotel, management authority commission and outside management in the part of the hotel owner, the relationship of outside circumstance and customer management in the part of the outside condition of hotel. Second, The result from the estimation of leadership and management results showed that the items of leadership measure were not in proportion to hotel management results. It was showed that the Management or the General Manager must break from the type of the conventional management and development the culture of tourist hotel, then accomplish the goal of management. It was indicated that the growth of hotel industry needs to the Management Leadership which impact on four parts in Hotel. In conclusion, this study was attempted to aid to hotel management in Korea as suggested the propriety on employee management, improve the efficiency of the management on the inside condition of hotel, appropriate the management on the outside condition of hotel, build the reasonable relationship with hotel owner, and create the new hotel image.

여행상품의 가격관리에 관한 이론적 연구

남택영,이익수 한국관광정책학회 2001 觀光政策學硏究 Vol.7 No.1

Tourism products can be interpreted as the whole goods and services produced by the tourism industry in a broad sense. And these products are tangible and intangible products satisfying consumers, i.e. tourists; these products include tangible products such as tourism souvenirs, various foods, and special products they purchase and intangible products such as services (tour guide, spa bathing, passenger transport, and game, etc.). But, the main tourism products are service products, and the majority of service products are traveling products. On the other hand, tourism products can be interpreted as the whole services related to traveling products and tourism in a narrow sense. Tourism products are commercialized products of tourism resources by tourist businessmen for sale if they are considered as spiritual, ideological, and abstract, rather than characteristic goods. The distinctive producing method of traveling products suitable for the features is required, but the producing method, which is a part of the development process of new product in the manufacturing industry, has been modified partially and applied until now. In addition, the difference among the respective development process of products should be considered somewhat due to various kinds of traveling products. Traveling products consist of various tourism resources, have great change in demand by seasons, and are easy to imitate, so it is not likely to he a simple problem to produce and sell traveling produces. For that reason, the policy keeping the close cooperative relationship with resources providers and controlling prices properly by change in demand is required to keep the market share of travel agencies and to invite new customers. Therefore, it is required of continuous study on the product development process suitable for production of various traveling products and pricing policy suitable for conditions.

관광전문인력 양성을 위한 컴벤션기획사자격제도 개선에 관한 연구

남택영,염명하 문화관광연구학회 2003 문화관광연구 Vol.5 No.2

The main purpose of this study is finding the betterment method of convention planner license for tourism manpower training. Convention is a communication channel to arbitrate in conflicting interests, encourage mutual exchanges such as information and materials and promote friendship among countries. Convention industry should be prepared with a long-term in a lot of sectors, for example, hotel, transportation, tourism, publication, technology, ceremony, and the like. Convention planner is very important a part of convention &as to manage every work in its field respectively from budgeting, planning, marketing, and registering to accommodation, seminars, tourism, and social gathering. In this study, I explained theory of convention planner license and discussed problem of convention planner and then, found the betterment method of convention planner license for tourism manpower training.

基本群의 몇가지 適用에 關하여

張澤相 群山大學校 1982 論文集 Vol.3 No.-

기본군 Π(X, x), H-space와 map deg, exponential map등의 몇가지 성질을 이용하여 n ≥2 일 때 S1과 S2은 same homotopy type이 아님을 밝히고 (Cor11) 대수학의 기본정리를 기본군을 이용하여 증명 (Theo13) 하였다.

Hodge operator 와 Riemannian Submersion에 關하여

張澤相 群山大學校 1983 論文集 Vol.5 No.-

Mⁿ을 n 次元 Riemann 多樣體라 하고 內部微分과 그의 adjoint를 각각 d와 d*로 표시하며 △를 Hodge의 operator라 하자. 本稿에서는 Hodge operator가 submersion과 可換하기 위한 必充條件을 살피고 몇가지 성질들을 考察하였다.

풍력발전기의 설비이용률 계산을 위한 확률밀도함수의 비교

강택근,허종철,좌종근 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.1

The Weibull probability density function and the Rayleigh function are compared by analyzing the capacity factors which are computed using the probability density functions with different mean wind speeds. For this analysis, the wind speed means of arithmetic, root mean square, cubic mean cuberoot, and standard deviations are computed from the measured wind speed data of a specific site, and the coefficients of probability density functions are calculated. The capacity factors for Vestas 850[kW] wind turbine are calculated and analyzed. The results show that the wind speed frequency curve by Rayleigh function is more close to the actual curve than by Weibull function. The more the wind speed frequency curve is close to the actual one, the more the capacity factors become large values.

호텔기업 총지배인 리더십 연구

남택영 한국관광정책학회 2000 觀光政策學硏究 Vol.6 No.2

It is a fact that the industry which do not change could not exist under the present circumstance. There is a need today for a change in Korean Hotel Industry. That is, types of management are rearranged as soon as possible. It is not expected that the future of Hotel Industry and the improvement of service industry is clear in case of failure to change in Korean Hotel Industry. Accordingly, the aspect of General Manager in Hotel Industry must change to survive under the present market condition. The purpose of this study is to suggest the transformational leadership, which is different from the traditional type of transactional leadership to accomplish the goal of Hotel management and which is suitable for 'A New Paradigm' The author attempts to specify the distinction of transformational leaders who attempt to satisfy current needs of followers and who attempt to raise the needs of followers and promote dramatic change of individuals, groups and organizations. A transformational leader is, as it were, a model of what a man ought to be who understands what employee need and what they want to be cared, and who emphasizes the value of corporate culture in Hotels, and establishes the standard of the job conduct. A transformational leader will be considered the manager as who have the courage to work for the improvement of Hotel Industry and will be respected as a competent leader from followers and subordinates.