단방향 이동 Ad Hoc 망에서의 다중경로를 이용한 QoS 라우팅 프로토콜

강경인,박경배,유충렬,정찬혁,이광배,김현욱,Kang, Kyeong-In,Park, Kyong-Bae,Yoo, Choong-Yul,Jung, Chan-Hyeok,Lee, Kwang-Bae,Kim, Hyun-Ug 한국정보처리학회 2002 정보처리학회논문지 C : 정보통신,정보보안 Vol.9 No.6

이동 애드 혹(Ad hoc)네트워크란 노드의 이동에 따라 시시각각 변하는 무선 링크로 연결되어진 여러 개의 단말기들로 구성된 있는 자치분산 네트워크를 의미한다. 지금 까지 이동 ad hoc 네트워크에서의 통신은 Voice(음성)와 Data(데이터)통신을 제공하는 Best effort(최선형)서비스를 제공하는 라우팅 프로토콜만이 고려되어왔기 때문에 이동 네트워크를 사용하는 사용자가 많은 양의 자원을 차지하는 VOD(Video On Demand)와 같은 멀티미디어 Data를 보다 빠르고 정확하고 신속하게 전송하기 위해서는 기존의 Best effort 방식으로 전송되는 라우팅 프로토콜에는 많은 한계가 있었다(1). 따라서 본 논문에서는 성능평가를 위해 단방향 환경 하에서의 QoS(Qualify of Service)를 고려한 제안한 알고리즘을 적용하였다. 성능평가 카네기 멜론 과 버클리대학에서 만든 Ns-2를 사용하여 최선형 서비스(Best Effort)와 비교하여 QoS 서비스의 수신율 상승과 평균 경로설정 시간의 감소, 네트워크 부하 감소를 얻을수 있었다. It is the Mobile Ad Hoc Networks that constituted with serveral mobile node that can communicate with other mobile nodes. Until now, there were no routing protocols considering such as Multimediadata, VOD (Video On Demand), which is required of lots of bandwidth in Mobile Ad Hoc Network, io we are in the need of QoS (Quality of Service)routing protocol to transmit the data packets faster and more accurate. Also, there are an unidirectional links due to asymmetric property of mobile terminals or current wireless environments on practical mobile ad hoc networks. However, at present, the existing mobile ad hoc routing protocols are implemented to support only bidirectional links. In this paper, we propose the Advanced Routing routing protocol in order to implement a new routing protocol, which is fit to mobile ad hoc networks containing unidirectional links and to support QoS service. For the performance evaluation, we use NS-2 simulator of U.C. Berkeley. We could get not only increased received data rate and decreased average route discovery time, but also network load decreases with compared Best effort service.

MANET 환경에서의 네트워크 부하관리에 관한 연구

강경인,박경배,정찬혁,Kang, Kyeong-In,Bae, Park-Kyong,Jung, Chan-Hyeok 한국전기전자학회 2003 전기전자학회논문지 Vol.7 No.2

라우팅 기능을 가진 이동노드로 구성된 자치 분산 네트워크인 애드 혹 네트워크에서는 여러 개의 경로 서비스 제공으로 인하여 특정 노드에 네트워크 부하가 증가되었을 경우에 대한 방법이 고려되지 않았다. 본 논문에서는 네트워크 트래픽 혼잡을 줄임과 동시에 데이터 전송과정에서의 네트워크 부하를 분산 시킬 수 있는 트래픽 관리 라우팅 프로토콜을 제안하고 평가하였다. NS 네트워크 시물레이터를 통해 제안한 알고리즘을 적용한 결과 네트워크 부하의 감소와 데이터 전송율의 증가를 얻을 수 있었다 Ad Hoc Networks, autonomous distributed network using routing scheme, does not operate properly owing to multi flow service when network load increases at specific network node. In this paper, we suggest traffic management routing protocol in Ad Hoc Network to reduce network traffic congestion and distribute network load in data transmission. Through test results of proposed algorithm under NS(Network Simulator)simulator environments . we acquired reduced network load and increased data transmission rate.

고속 프랙탈 영상 부호화 기법

이광배(Lee Kwang Bae),김현욱(Kim Hyen Ug),송광석(Song Kwang Suk),김정일(Kim Jeong Il),강경인(Kang Kyeong In),박경배(Park Gyong Bae) 한국정보처리학회 1996 정보처리학회논문지 Vol.3 No.5

In this paper, we propose a fast fractal image coding algorithm to shorten long to take on fractal image encoding. For its performance evaluation, the algorithm compares with other traditional fractal coding methods. In the traditional fractal image coding methods, an original image is contracted by a factor in order to make the corresponding image to be compared with. Then, the whole area of the contracted image is searched in order to find the fixed point of contractive transformation of the original image corresponding to the contracted image. It needs a lot of searching time on encoding. However, the proposed algorithm considerably reduces encoding time by using scaling method and limited search area method. On comparison of the proposed algorithm with Jacquin''s method, the proposed algorithm is at least 180 times as fast as that of Jacquin''s method on encoding time with a little degradation of the decoded image quality and a little increase of the compression rate. Therefore, it is found that the proposed algorithm largely improves the performance in the aspect of encoding time when compared with other fractal image coding methods.

Congestion 이동 Ad hoc 네트워크 환경에서의 네트워크 부하 감소에 관한 연구

강경인(Kyeong In Kang),박경배(Gyong Bae Park),유충렬(Choong Yul Yo),정찬혁(Chan Chyok Jung),이기원(Ki Won Lee),오세덕(Se Duck Oh),이광배(Kwang Bae Lee),김현욱(Hyun Wook Kim) 한국통신학회 2002 한국통신학회 학술대회논문집 Vol.2002 No.7

영상 부호화를 위한 DCT 계수 블럭 크기 분류

강경인(Kang Kyeong In),김정일(Kim Jeong Il),정근원(Jeong Keun Won),이광배(Lee Kwang Bae),김현욱(Kim Hyen Ug) 한국정보처리학회 1997 정보처리학회논문지 Vol.4 No.3

In this paper, we propose a new algorithm to perform DCT(Discrete Cosine Transform) within the area reduced by predicting position of quantization coefficients to be zero. This proposed algorithm not only decreases the encoding time and the decoding time by reducing computation amount of FDCT(Forward DCT) and IDCT(Inverse DCT) but also increases compression ratio by performing each different horizontal-vertical zig-zag scan according to the classified block size for each block on the huffman coding. Traditional image coding method performs the same DCT computation and zig-zag scan over all blocks, however this proposed algorithm reduces FDCT computation time by setting to zero instead of computing DCT for quantization coefficients outside classified block size on the encoding. Also, the algorithm reduces IDCT computation time by performing IDCT for only dequantization coefficients within classified block size on the decoding. In addition, the algorithm reduces Run-Length by carrying out horizontal-vertical zig-zag scan appropriate to the classified block characteristics, thus providing the improvement of the compression ratio. On the other hand, this proposed algorithm can be applied to 16*16 block processing in which the compression ratio and the image resolution are optimal but encoding time and the decoding time take long. Also, the algorithm can be extended to motion image coding requiring real time processing.

고구마껍질을 주원료로 한 식물혼합물의 면역증강 및 항암효과

정인선(In-Seon Jeong),강경순(Kyeong Sun Kang),김은혜(Eun-Hye Kim),박승만(Seung Man Park),정미자(Mi Ja Chung) 한국식품영양과학회 2020 한국식품영양과학회지 Vol.49 No.12

도라지, 더덕, 옥수수수염을 포함한 고구마껍질 주원료인 식물혼합물의 RAW264.7 대식세포 및 AGS 인체 위암세포에서 면역 활성 증진 효과 및 항암효과를 연구하였다. 본 연구에서 개발된 제품들은 고구마껍질 주원료인 식물혼합물을 함유한 액상 파우치(M3E-A), 농축액상 스틱 파우치(M3CB) 그리고 티백 침출차(M3T-C)이다. M3A, M3B, M3C는 각각 M3E-A, M3C-B, M3T-C를 추출 및 농축 후 동결건조한 분말이다. M3A, M3B 및 M3C는 RAW264.7 대식세포에서 NO 및 전염증성 사이토카인(TNF-α, IL-1β, IL-6) 생산량을 농도 의존적으로 증가시켰고, NO 및 사이토카인(TNF-α, IL-1β, IL-6) 수준은 M3A 또는 M3C를 처리한 RAW264.7 대식세포에서 M3B를 처리한 RAW264.7 대식세포보다 높았다. 마우스에 M3C(100 ㎎/㎏, 300 ㎎/㎏)를 구강으로 투여하였다. M3C를 섭취한 마우스는 비장세포증식, NO 수준과 사이토카인(INF-γ, IL-10) 수준이 대조군과 비교하여 현저하게 증가하였다. 250~2,000 ㎍/mL M3A, M3B 및 M3C를 각각 AGS 세포에 처리했을 때 농도 의존적으로 AGS 세포 성장을 억제하였다. 이와 같은 결과들은 고구마껍질 주원료인 식물혼합물을 이용하여 개발된 제품들이 건강한 사람과 암 환자의 면역 활성 증진 및 항암효과를 위해 사용할 수 있을 것이라 예상할 수 있었다. This study investigated the immune-enhancing activity and anticancer effects of a sweet potato peel-based plant mixture, including Platycodon grandiflorum, Codonopsis lanceolata and corn silk, on RAW264.7 macrophages or AGS human gastric cancer cells. The products developed in this study were pouches (M3E-A) made by plant mixture extract, stick pouches (M3C-B) made using M3E-A concentrate and plant mixture tea (M3T-C). The M3A, M3B, and M3C were in the form of freeze-dried powder after the extraction and concentration of M3E-A, M3C-B, and M3T-C, respectively. The M3A, M3B, and M3C dose-dependently increased the production of nitric oxide (NO) and pro-inflammatory cytokines such as tumor necrosis factor-alpha (TNF-α), interleukin (IL)-1β and IL-6 in RAW264.7 macrophages. The NO and cytokine (TNF-α, IL-1β, and IL-6) levels in the M3A or M3C-treated RAW264.7 macrophages were higher than those in the M3B-treated RAW264.7 macrophages. Mice treated orally with M3C (100 ㎎/㎏, 300 ㎎/㎏), resulted in significantly increased splenocyte proliferation, NO levels and cytokine (INF-γ, IL-10) levels compared to control mice. The M3A, M3B, and M3C (250 to 2,000 ㎍/mL), respectively, inhibited the growth of AGS cells in a dose-dependent manner. These results indicate that products using sweet potato peel-based plant mixture may be used for immuno-enhancing and anticancer effects by healthy people and cancer patients.

실버농업인의 농촌정착과정 및 적응요인

박공주(Gong-Ju Park),강경하(kyeong-Ha kang),윤순덕(Soon-Duck Yoon),강혜원(seong-In Yoon),윤성인(Hye-won kang) 한국지역사회생활과학회 2005 한국지역사회생활과학회 학술대회 자료집 Vol.2005 No.-

생산성 영향요인을 고려한 건설현장 토공사 시뮬레이션 모델 개발

사세원 ( Sa Sewon ),이찬우 ( Lee Chanwoo ),조훈희 ( Cho Hunhee ),강경인 ( Kang Kyeong-in ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.1

Earthwork is the starting work of construction process, which has the greatest impact on the productivity of the construction project among the works. However, it is difficult to derive accurate productivity becuase the earthwork plan is affected by geological condition of the jobsite. Therefore, a simulation model for productivity analysis of earthwork was developed using CYCLONE modeling method in this study. In this paper, simulation model was made considering the impact factors of earthwork productivity. The proposed model can be utilized for sensitivity analysis in future studies.

다발성경화증 및 신경매독에서의 뇌척수액의 면역학적 검사소견의 고찰

김용 ( Yong Kim ),김상욱 ( Sang Wook Kim ),박인조 ( In Jo Park ),강경구 ( Kyeong Ku Kang ),문학성 ( Hack Sung Moon ) 대한내과학회 1977 대한내과학회지 Vol.20 No.6

고대영어의 진행상

강경인 대한언어학회 1998 언어학 Vol.6 No.1

Kang, Kyeongin. 1998. The Progressive in Old English. Linguistics, 6-1, 93-108. The use of the progressive in Old English must mention that the construction: beon/wesan + -ende occurred regularly and frequently. The progressive indicates activity continuing through a period of time - activity with duration, while the non-progressive only reports activity without indication that it has duration. The most common function of the progressive is to indicate duration and an action in progress. Most of the meanings of the progressive in ModE are also found in OE. Imperfectivity has been touched upon a few times. The meaning of duration in the OE progressive may have been a construction that was either adapted from Latin or reinforced by Latin usage. In later OE the meaning of duration appears to have been the most one: Elfric. The meaning of the progressive is used to express a supposition as well. The meaning of frame-time discussed by Jespersen is frequently found in OE progressive. There is a strong similarity between the meaning of frame-time and that of simultaneity. The simultaneity is found most frequently in sub-clauses. The progressive expresses inchoativity, which it rarely does in ModE. The subjective character is closely related to the descriptive character of the progressive. Another closely related meaning of the progressive in OE is the intensive character of the progressive. Repetition is expressed by the progressive in OE. The use of the progressive to express emotions such as irritation, disgust, vexation and the like seems rather modern. The. progressive is sometimes used with future meaning and in the function of the neutral present, a usage which is practically non-existent in ModE. ' The progressive seems to have been used at random, with little or no meaning, as a stylistic device. (Chonbuk National University)