• 한국정보처리학회논문지
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• 제3권6호
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• pp.1534-1541
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• 1996

경로 보안은 데이타의 전송을 위해 선택된 경로의 비밀성에 관한 것이다. 만일 경로의 일부분이라도 알려진다면 이 경로를 통해 전달된 데이타가 유출될 확률은 크 다. 이런 이유때문에 데이타의 전송경로는 보호되어야 하며 이를 위해 우리는 한 개 의 중간노드를 비밀리 선택하여 기존의 최단 거리를 이용하여 데이타를 전송하는 방 법을 선택하지 않고 이 중간 노드를 이용하여 데이타를 전송한다. 더 나아가 우리가 여러 개의 비밀경로를 이용한다면 한 개의 경로에 모든 데이타를 보내는 대신에 각 경로에 partial 데이타를 보낼 수 있기 때문에 데이타의 보안은 좀 더 강해진다. 이 러한 아이디어를 실현하기 위해 데이타는 정보분산 방법을 이용하여 여러개의 partial 데이타로 나누어진다. 본 논문에서는 위에서 제시한 아이디어를 네트워크상 에서 구현한다.

• 한국정보통신학회논문지
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• 제13권6호
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• pp.1208-1214
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• 2009

센서 네트워크는 무선 네트워크에 비해 데이터 혼잡과 핫 스팟에 취약하다. 이는 이동 싱크 지원 라우팅 프로토콜이 다수의 제어 패킷을 사용하고 단일 노드를 통해 모든 패킷을 전송하기 때문이다. 따라서 패킷의 수를 감소시키고 패킷을 분산시키는 라우팅 프로토콜이 필요하다. 이를 위해서 본 논문에서는 클러스터 노드의 에이전트를 이용한 이동 싱크 지원 라우팅 프로토콜을 제안한다. 이의 프로토콜은 기존 이동 싱크 지원 라우팅 프로토콜보다 패킷의 수를 줄임으로써 통신 오버헤드와 에너지 소비를 감소시킨다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 II
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• pp.1169-1172
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• 2003

In this paper, a CLB-based CPLD low-power technology mapping algorithm consider area and delay time is proposed. To perform low power technology mapping for CPLD, a given Boolean network have to be represented to DAG. The proposed algorithm are consist of three step. In the first step, TD(Transition Density) calculation have to be performed. In the second step, the feasible clusters are generated by considering the following conditions: the number of output, the number of input and the number of OR-terms for CLB(Common Logic Block) within a CPLD. The common node cluster merging method, the node separation method, and the node duplication method are used to produce the feasible clusters. In the final step, low power technology mapping based on the CLBs is packing the feasible clusters into the several proper CLBs. The proposed algorithm is examined by using benchmarks in SIS. In the case of that the number of OR-terms is 5, the experiments results show that reduce the power consumption by 30.73% comparing with that of TEMPLA, and 17.11% comparing with that of PLAmap respectively.

• 대한전기학회논문지
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• 제39권5호
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• pp.494-499
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• 1990

A new compact hierarchical representation method image is proposed. This method represents a binary image with the set of decimal numbers. Each decimal number represents the pattern of nonterminal node(gray node) in the quadtree. This pattern implies the combination of its four child nodes. The total number of gray nodes is one third of that terminal nodes. We show that gray tree method is efficient comparing with others which have been studied.

• 대한수의학회지
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• 제34권2호
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• pp.229-235
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• 1994

The hemal nodes of the Korean native cattle were studied by gross anatomy and light microscopy. Hemal nodes were spherical or ovoid in shape, and red or black in colors. A hemal node consisted of a thick capsule and a hilum, and had extensive subcapsular and deep sinuses distended by a great number of erythrocytes. Although a few lymphatic nodules and tissues were seen in the parenchyma, no typical cortex and medulla was defined. Blood vessels occurred, but lymph vessel was not observed in nodes. The stroma of the hemal node was composed of reticular cells and fibers. The parenchyma consisted of many erythrocytes and lymphocytes, and a few macrophages and megakaryocytes. The capsule and trabecula was a collagenous connective tissue with smooth muscle cells. B-lymphocytes were principally located in the lymphatic nodules of the hemal node. T-lymphocytes were scattered in the diffuse lymphatic tissues of the hemal node.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.96-98
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• 2002

This paper proposes the digital pin line checker which can extremely improve the efficiency of the pine line checking using a micro processor. The line checker is designed which can check efficiently up to maximum 2048 pin. Alarm busser is designed ringing real-timely the case that the pin line is connected differently with real node number. Accordingly the comparing and identifying work visually the node number showing on the displaying board with real node number is avoided after the electronic stimulus enforce to the pin of the fixture by the test engineer. The digital line checker is designed based on the 8051. And the effectiveness and accuracy of the proposed line checking strategy is tested by simulating the several error connections for pin lines on the small scale board.

• 전기전자학회논문지
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• 제22권3호
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• pp.570-577
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• 2018

With the increasing number of network nodes, traditional client/server node selection mechanisms are under tremendous pressure. In order to select efficient cooperative nodes in a highly dynamic P2P network topology, this article uses greedy algorithm to translate the overall optimization into multiple local optimal problems, and to quickly select service nodes. Therefore, the service node with the largest comprehensive capacity is selected to reduce the transmission delay and improve the throughput of the service node. The final simulation results show that the node selection strategy based on greedy algorithm can effectively improve the overall performance of P2P streaming media system.

• 한국멀티미디어학회논문지
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• 제22권12호
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• pp.1438-1446
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• 2019

Recently, the number of mobile users as well as high-speed Internet user has been increasing rapidly. Moreover, traffic is growing fast as services that provide real-time content such as Youtube and Netflix become popular. The problem of traffic control in real-time content services is important because many people use cell phones to receive real-time content. In this regard, the field of CCN is currently being studied. We studied the mobility of nodes among CCN research fields. Node mobility can be divided into three categories : consumer mobility, intermediate node, and provide mobility. In this paper, we propose Mobility Node Support(MD-INS) to support the intermediate-node mobility in CCN real-time services. Experimental results show that the proposed scheme shows better performance than CCN in terms of service disconnection time and packet loss.

• International Journal of Internet, Broadcasting and Communication
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• 제12권3호
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• pp.156-162
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• 2020

Wireless Sensor Network (WSN) field is mainly studied to monitor and characterize large-scale physical environments to track various environmental or physical conditions, such as temperature, pressure, wind speed and humidity. WSN can be used in various applications such as wild surveillance, military target tracking and monitoring, dangerous environmental exploration and natural disaster relief. We design probabilistic mobile models that apply to mobile ad hoc network mobile environments. A probabilistic shift model proposed by dividing the number of moving nodes and the distance of travel into two categories to express node movement characteristics. The proposed model of movement through simulation was compared with the existing random movement model, ensuring that the width and variation rate of the first node node node node (FND) was stable regardless of the node movement rate. In addition, when the proposed mobile model is applied to the routing protocol, the superiority of network life can be verified from measured FND values. We overcame the limitations of the existing random movement model, showing excellent characteristics in terms of energy efficiency and stable in terms of changes in node movement.

• 대한두경부종양학회지
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• 제34권1호
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• pp.1-7
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• 2018

Papillary thyroid carcinoma has a good prognosis, but the frequency of locoregional lymph node metastasis is high and is known to occur stepwise fashion. Prophylactic central node dissection in papillary thyroid carcinoma is widely performed from the past. But, the pros and cons of the prophylactic central node dissection has been ongoing for a long time. In the American Thyroid Association management guideline for thyroid nodules and differentiated thyroid cancer, which is the most widely used, recommendations about prophylactic central node dissection has been changed in past ten years. In recent systematic review and meta-analysis, prophylactic central node dissection increases the rate of transient hypocalcemia and recurrent laryngeal nerve injury, but there is no difference in the frequency of permanent hypocalcemia or recurrent laryngeal nerve injury. Prophylactic central node dissection has not been shown to improve patient survival, but recurrence has been reported to decrease. According to a questionnaire survey of the members of Korean Scociety of Thyroid-Head and Neck Surgery, Korean doctors tend to perform the prophylactic central node dissection more aggressively than other countries. The reason for this is that Korea has a large number of thyroid surgeries and therefore surgeons are more experienced than other countries.