싱크의 이동기능 지원을 위한 사전 경로배정방식 연구

박상준,이종찬,김형종,Park, Sang-Joon,Lee, Jong-Chan,Kim, Hyung-Jong 한국시뮬레이션학회 2008 한국시뮬레이션학회 논문지 Vol.17 No.1

If a sink can move in sensor networks, the routing change can be more occur. If the sink has the mobility, it moves in sensor network area so that the connection between the sink system and sensor nodes will be changed continuously. Hence, the overhead can occur cased by the many routing changed. Therefore, the dynamic routing scheme is needed to support the mobile sink connection. In this paper, we propose the previous connection assignment scheme. The mobile sink can have low cost overhead from calculating dynamic rerouting that it determines the new virtual path before the physical path setup. 센서 네트워크에서 싱크가 이동성을 가지게 되면, 네트워크의 라우팅에 변화가 그렇지 않은 경우 보다 심화된다. 이동싱크의 경우 센서 네트워크 지역을 지속적으로 이동하기 때문에 소스 센서 노드와의 통신상에서도 경로 변경이 발생하게 된다. 싱크의 이동으로 인한 경로변경은 많은 오버헤드를 부과할 수 있기 때문에 동적인 경로 변경에 대처하는 방안이 요구된다. 본 논문에서는 이러한 동적인 경로 변경을 위하여 사전 경로변경 방식을 제안한다. 동적 경로변경의 계산은 이동 싱크가 수행하여 네트워크의 오버헤드를 줄이며, 물리적 경로변경 이전에 경로를 배정함으로써 경로변경에 따른 지연을 최소화하고자 한다.

센서 네트워크에서 이동싱크로의 연결설정 방안

박상준,이종찬,김형종,Park, Sang-Joon,Lee, Jong-Chan,Kim, Hyung-Jong 한국시뮬레이션학회 2008 한국시뮬레이션학회 논문지 Vol.17 No.1

싱크의 이동성은 센서 네트워크에서 보다 많은 라우팅 변화를 발생시킨다. 능동적인 싱크의 이동으로 필요한 정보에 대한 적극적인 수집이 가능할 것이며, 이는 네트워크의 효용성을 더욱 높일 것이다. 하지만 고정된 싱크와 달리 싱크가 이동성을 가지게 되면 센서 노드와의 통신 연결이 지속적으로 변경될 수 있다. 라우팅 변동에 의한 경로 재설정이 불가피하게 되는 것이다. 이동 싱크로의 경로 설정에는 싱크에서 노드로의 경로 설정과 노드에서 이동 싱크로의 경로 설정 두 가지가 있다. 센서 네트워크에서 노드는 많은 제약을 가지고 있다. 노드에서 싱크로의 연결 설정을 발생할 경우 경로 배정에 대한 부담을 줄이는 방안이 제시되어야 한다. 따라서 본 논문에서는 노드에서 이동 싱크로의 경로 설정을 위한 에이전트 방식을 제안한다. 에이전트 방식은 중계 노드를 통하여 경로 설정이 필요한 노드와 이동 싱크와의 신속한 연결 방안을 제공한다. The sink mobility can request frequent routing change in sensor networks. By active mobility a sink can gather needed information easily so that the network availability will be higher. However, instead static sink system, the connection between sensor nodes and a mobile sink can be changed continuously. That is, the rerouting should be implemented caused by the routing alteration. It is two connection setups for the mobile sink system: the connection from sink to sensor nodes and the connection from sensor nodes to sink. However, sensor nodes actually have many functional limitations. Hence, the low cost scheme will be needed for the connection setup from sensor nodes to the mobile sink. In this paper, we propose an agent scheme to the connection setup from sensor nodes to the mobile sink. The agent scheme provides the reliable setup scheme to the connection by using an agent sector.

ATM 서브망에서 MCS 멀티캐스트 구현을 위한 전송 제어 시스템의 성능 평가

박상준,이효준,김관중,김영한,김병기,Park, Sang-Joon,Lee, Hyo-Jun,Kim, Kwan-Joong,Kim, Young-Han,Kim, Byung-Gi 한국음향학회 1997 韓國音響學會誌 Vol.16 No.6

ATM 망으로 연결된 하나의 서브 네트워크에서 MCS(Multicast Server)에 의한 멀티캐스팅은 전송 폭주에 대해 효율적인 제어방식을 요구한다. 본 논문에서는 MCS를 이용하여 TCP 패킷에 대한 멀티캐스팅을 구현하고 버퍼의 효율적 전송제어를 위해 공통 버퍼를 가지는 EPD + SPD방식 (Early Packet Discard-same Source Packet Discard)을 제안한다. MCS에서 전송 버퍼에 대한 임계치를 넘어서면 버퍼에 오버플로우가 발생하기 이전에 셀을 폐기시키는 것으로 손상된 패킷의 전송을 막기 위하여 부분적 셀 폐기 대신 손상된 패킷 전체를 폐기하는 방식(EPD-Early Packet Discard)을 제공한다. 또한 TCP 패킷의 재전송 중복에 대한 부하를 줄이기 위해 동일한 송신측의 패킷을 폐기하는 방식 (SPD-same Source Packet Drop)을 제안한다. 시뮬레이션 결과에서는 전송 데이터 폐기에 대한 기존의 방식(Tail Drop), EPD 방식을 고려한 DFF(Drop From Front)와 본 논문에서 제안한 EPD + SPD방식과의 성능 분석을 한다. The multicasting of MCS(Multicast Server) requires a effective traffic control scheme to prevent buffer overflow on ATM subnetworks. This paper considers MCS multicasting to TCP packets, and propose EPD + SPD scheme(Early Packet Discard-same Source Packet Discard) using common buffer. When the threshold of output buffer is reached, MCS drops an entire packet prior to buffer overflow, so that corrupted packets will not be transmitted by the server. And SPD scheme show that the EPD + SPD results in higher TCP throughput than that of tail drop and EPD + DFF.

폐렴우와 Klebsiella pneumoniae 실험적 감염 랫드의 기관 및 기관지 점막층에서 Globule leukocyte의 출현양상

박상준,이차수,정규식,Park, Sang-joon,Lee, Cha-soo,Jeong, Kyu-shik 대한수의학회 1997 大韓獸醫學會誌 Vol.37 No.4

The study was aimed at identifying the globule leukocytes (GL) of tracheal mucosa layer of Korean native cattle showing symptom of pneumonia which have died as enterotoxemia and normal Korean native cattle in Kyungpook local area. In another set of experiment, Isolated Klebsiella pneumoniae from suddenly died cattle specimens was subjected to rat for a determining globule leukocyte appearance by using histochemical and immunohistochemical method. In histochemical study, globule leukocytes generally was existed in all the case of postmortem of Korean native cattle and 3 heads of slaughtered cattle which showing symptoms of pneumonia and it showed significant increase in tracheal mucosa of rats experimentally infected with Klebsiella pneumoniae. These increased number of globule leukocytes was moderately remained on early infection stage and gradually decreased in timedependent manner after infection. The granule patterns were also determined as an acidmucopolysaccharide. In immunohistochemical study, serotonin intensity in the treacheal mucosaepithelial cells of rat experimentally infected observed a strong immunoreactivity during early infection and gradually decreased in dependent of infection stage while no IgE immunoreactivity observed. These data show that globule leukocytes were increased in a pneumonia, therefore it was considered as a valuable cell that was associated with early stage of inflammatory response.

Al-xSi-2Cu-1Mg/ySiC(x:6 , 12 , 18. y:0∼10wt.%) 계 복합재료의 열적성질에 관한 연구

박상준,조원용,강세선,임윤수,권혁무,윤의박 ( Sang Joon Park,Won Yong Jo,Se Seon Kang,Yoon Su Lim,Hyuk Mu Kwon,Eui Park Yoon ) 한국주조공학회 1993 한국주조공학회지 Vol.13 No.4

N/A The purpose of this study is to obtain basic information on the particle dispersion, the coefficient of thermal expansion and the thermal conductivity of compocasted Al-xSi-2Cu-1Mg/ySiC(x:6, 12, 18. y: 0∼10wt.%) composite. With increasing the content of SiC particles, the thermal expension coefficient and the thermal conductivity decrease. The coefficient of thermal expension between 20 and 300℃ is 21.3×10^(-6)/℃∼ 18.0×10^(-6)/℃ for the Al-Si alloys and 18.4×10^(-6)/℃∼16.0×10^(-6)/℃ for the composite with 10wt. % SiC. The thermal conductivity at 300℃ is 121∼169W·m^(-1)·k^(-1) for the Al-Si alloys and 114∼159W·m^(-1)·k^(-1) for the composite with 10wt. % SiC.

이종 액세스 네트워크 구조에서 자원관리 방안

박상준,Park, Sang-Joon 한국시뮬레이션학회 2005 한국시뮬레이션학회 논문지 Vol.14 No.2

Access networks connected in B3G networks provide its property network service. Hence, though mobile users may utilize only a network service from an access network, they can also use variety of network services from several access networks for their service satisfaction. To support heterogeneous changeable network service in access networks, the mobile terminal must implement heterogeneous system techniques so that it is able to change the network service by ISHO (Inter-System Handover) In this paper, we present the ISHO condition by the policy-based framework in B3G networks. Also, we propose an ISHO scheme to control network resources for the QoS management of a mobile session between UMTS and WLAN access networks. To support the QoS management, the proposed scheme is that it will be implemented before the resource exhaustion occurs to effect network performances.

해양콘크리트의 연행공기량이 동결융해 저항성 및 염화물 확산특성에 미치는 영향에 관한 연구

박상준(Park, Sang Joon),유재강(Yoo, Jae Kang),신홍철(Shin, Hong Chul),김영진(Kim, Young Jin),박형근(Park, Hyung Keun),임현칠(Lim, Hyun Chil) 한국콘크리트학회 2005 한국콘크리트학회 학술대회 논문집 Vol.2005 No.11

시멘트의 품질특성이 해양 환경에 시공되는 콘크리트의 내염해성에 미치는 영향

박상준(Park, Sang-Joon),소광호(Sho, Kwang-Ho) 대한건축학회 2013 大韓建築學會論文集 : 構造系 Vol.29 No.12

In this study, effects of the qualities of ordinary portland cement on chloride migration of offshore concrete were evaluated. Firstly, physical property and chemical composition of six domestic typeⅠordinary portland cements were investigated. And properties of chloride resistance of concrete using six cements were tested. As a result, even thought six cements met the criteria of KS L 5201, physical property and chemical composition of cements were varied with the kinds of cement. The density and fineness of cements showed 3.08 g/㎤ to 3.15 g/㎤ and 3,274 ㎠/g to 3,689 ㎠/g, respectively. In mineral composition, the content of C3S and C2S showed the range of 16.1 % to 47.4 % and 21.6 % to 54.1 %, respectively. The chloride content of concrete was proportional to the chloride content of cement. Also, it could be analyzed that over 65 % of the chloride content of concrete came from cement. Compressive strength of concrete had the difference of maximum 24.8 % at age 7days and maximum 15.7 % at age 28days depending on the kinds of cement. Chloride diffusion coefficient of concrete showed the range of 11.6∼15.7×10<SUP>-12</SUP> ㎡/s at age of 7 days and the range of 4.33∼5.81×10<SUP>-12</SUP> at age of 28 days. Based on chloride diffusion coefficient, it could be analyzed that chloride ingress time of concrete had the difference of maximum 1.5 times depending on the kinds of cement.

팽창재를 혼입한 고내구성 해양콘크리트의 염화물 확산특성

박상준(Park Sang-Joon) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.11

Recently, high strength, flowability, and durability of concrete were required according to increase of large scale and high rise structure. However, cracks occurred easily on the high performance concrete. In this reason, using expansion agent for reducing shrinkage cracks were increased, but it did not consider on durability of high performance concrete. Accordingly, this study investigated the resistance of shrinkage and damage form salt by mixing CSA expansion agent on the blast-furnace slag cement and mixed cement for the low heat of hydration by three components. The cases that 8 % of expansion agent was mixed and the proportion was OPC were expanded till 43.7 times compared with control concrete. For the resistance to the damage of salt, it was improved when mixing ratio was incresed and the maximum size of coarse aggregate growed bigger. In this study, the resistance to the damage of salt of the cases that 8 % of expansion agent was mixed was improved about 16 % compared with control concrete. The terms of durability from the resistance to the damage of salt were improved 1.7 times at maximum when mixing ratio was incresed and 1.5 times at maximum when maximum size of coarse aggregate growed bigger.

현대문학 : 『천변풍경』의 작품 세계 -객관적 재현과 주관적 변형의 대위법

박상준 ( Sang Joon Park ) 반교어문학회 2012 泮橋語文硏究 Vol.0 No.32

박태원의 『천변풍경』과 관련된 문제점들을 발전적으로 해소하기 위해서는 텍스트에 대한 정치한 분석과 그에 근거한 작품 해석이 요청된다. 『천변풍경』은 추상화된 시간과 좁혀진 공간을 배경으로 하여 보편적인 일상사를 그리고 있다. 정치적, 계급적인 관계망 바깥의 수많은 중산층 및 서민들을 설정한 위에 긍정적인 인물군을 중심으로 다사다난한 일상사를 형상화하고 있다. 이를 위해, 복합적인 면모를 갖춘 서술자가 등장하여 주요 서브스토리들의 교차적인 구성방식과 비초점화된 복합적 진술방식, ``행복`` 등의 추상적 관념에 닿아 있는 서술초점 설정 방식을 구사한다. 그 결과로 『천변풍경』은 불행한 세태에 대한 객관적 재현과 그 속에서조차 긍정성에 주목하는 서술자-작가의 의도에 따른 주관적 변형이 혼재된 양상을 띤다. 그러나 재현보다는 변형, 서술방법보다는 의도적인 서술초점 설정이 우세하여, 이 작품의 다양한 주제효과의 바탕에는 일상의 세태에 대한 근본적인 긍정이 깔려 있다. 이렇게 현실 바깥의 풍속을 스스로 체현했다는 데서 『천변풍경』의 문학사적 위상이 마련된다. Strict scrutiny and interpretation of the text of "CheonByeonPungKyeong"[川邊風景] are necessary to solve and sublate some significant polemics about this work. This novel shows the figuration of everyday lives on the background of abstracted time and narrowed space. Event after event takes place amongst numerous middle and lower classes, especially the groups of affirmative main characters. This is displayed by the narrator possessing complex aspects, who makes main sub-stories appear by turns, uses ``unfocused complex utterance`` and puts the focus of narration on such abstract concepts as happiness, peace or hope. As a result, this novel shows on the one hand the objective representation of everyday lives full of agony and happiness or misery, and on the other hand the subjective variation made by the narrator-author`s intention of focusing on the affirmative aspect of those everyday lives. It can be said that the various thematical effects of this novel appear on the basis of a fundamental affirmative acceptation of everyday lives; for the subjective variation and the intention of deciding focus are more prevalent than the objective representation and the narrating method. The status and significance of "CheonByeonPungKyeong" in the history of modern Korean literature derives from the fact that this novel itself embodies everyday lives in such fashion.