• 제목/요약/키워드: 이동통로

검색결과 261건 처리시간 0.034초

A Mobile Agent Tracking Using Distributed Event Service (분산 이벤트 서비스를 이용한 이동 에이전트 추적)

  • Bang, Dae-Wook
    • The KIPS Transactions:PartA
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    • 제10A권1호
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    • pp.35-42
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    • 2003
  • In this paper, we analyzed the known agent tracking models and proposed a new agent tracking model based on the distributed event service that always assures reliable tracking. Also we experimented the Performance of the event servers on the agent monitoring system that implements the distributed event service and showed their performance to decrement gracefully. The proposed tracking model doesn't make only several clients trace a mobile agent which moves among agent servers autonomously, but also supports two types of agent tracking agent location tracking that notifies agent location to the clients and path establishment that maintains reliable connection between agent servers for message delivery.

Indoor Passage Tracking based Transformed Generic Model (일반화된 모델의 변형에 의한 실내 통로공간 추적)

  • Lee, Seo-Jin;Nam, Yang-Hee
    • The Journal of the Korea Contents Association
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    • 제10권4호
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    • pp.66-75
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    • 2010
  • In Augmented Reality, it needs restoration and tracking of a real-time scene structure for the augmented 3D model from input video or images. Most of the previous approaches construct accurate 3D models in advance and try to fit them in real-time. However, it is difficult to measure 3D model accurately and requires long pre-processing time to construct exact 3D model specifically. In this research, we suggest a real-time scene structure analysis method for the wide indoor mobile augmented reality, using only generic models without exact pre-constructed models. Our approach reduces cost and time by removing exact modeling process and demonstrates the method for restoration and tracking of the indoor repetitive scene structure such as corridors and stairways in different scales and details.

Current Status of Road-Killed Amphibian and Reptile and Conservation Plands in Songgye Valley, Woraksan National Park (월악산국립공원 송계계곡 일대의 양서.파충류 노상상해 현황 및 보전방안)

  • Song, Jae-Young;Oh, Hong-Shik
    • Korean Journal of Environment and Ecology
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    • 제20권4호
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    • pp.400-406
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    • 2006
  • To investigate the incidence of the road-kill of amphibians and reptiles in Songgye valley, Woraksan National Park, a survey of Songgye valley was conducted from January, 2003 to December, 2005. Before the investigation, the survey area was divided into 50 sites at 300m intervals. As a result, road-kill by vehicles were confirmed to affect 40% of the amphibians and 68.3% of the reptiles among the total species in the Woraksan National Park. The most affected species was Rana dybowskii, with a frequency of 94.9% among the total number of road-killed Individuals. The highest road-kill rate occurred between April to May, every year. Therefore, it is necessary to construct an eco-bridge and to perform the continuous ecological monitoring for the conservation of R. dybowskii including other species.

수중보 철거의 타당성 검토 - 섬진강 수중보를 대상으로 -

  • Kim, Jin-Hong
    • Proceedings of the Korea Water Resources Association Conference
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    • 한국수자원학회 2008년도 학술발표회 논문집
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    • pp.928-932
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    • 2008
  • 본 연구는 국가하천인 섬진강 내에 하상세굴 방지를 위하여 설치한 섬진강 수중보가 하천의 수질오염 가중, 하천 생태통로 차단, 홍수 소통능력 저해 등의 문제점에 따른 방안으로 이를 철거하자는 의견이 제시되어, 수중보(낙차공)의 철거 여부에 대한 타당성 검토를 수행하는 데 있다. 따라서 본 연구는 보 철거시 고려할 사항으로서 보의 철거 기준, 하천의 물리적 및 수질특성 변화, 하천의 생물상 변화를 검토하였다. 섬진강 수중보를 철거함으로써 기대되는 가장 큰 장점은 생태이동 확보와 수질 개선 및 홍수소통 능력 향상이었다. 그러나 섬진강 수중보는 보의 기능 외에도 낙차공의 기능까지 겸하고 있으며, 만약 수중보를 철거할 경우 하천의 급경사에 따른 과다한 하상세굴, 상수도 취수시설의 용수수급 불가능, 문척교 교각의 세굴 발생 및 기초의 안정성 문제점, 지류와의 단차, 서시천 농업용수 취수시설의 용수 수급 불가능이 발생되며, 이를 해결해야지만 섬진강 수중보를 철거하는 단계로 진전될 수 있음이 밝혀졌다.

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A Configuration Design of Integrated Gateway System for Wireless-Internet Service in cdma2000 and W-CDMA (동기식/비동기식 IMT-2000 에서 무선인터넷 접속을 위한 통합 게이트웨이 시스템의 형상 설계)

  • Kim, Soon-Choul;Ryu, Jae-Hong;Ryu, Won
    • Proceedings of the IEEK Conference
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    • 대한전자공학회 2003년도 하계종합학술대회 논문집 I
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    • pp.577-580
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    • 2003
  • 최근 차세대통합네트워크(NGN), ALL-IP 망 진화 방향과 함께 동기식과 비동기식 IMT-2000 망의 통합(Convergence) 또는 연동(Harmonization)에 관한 연구가 활발히 이뤄지고 있으며, 이동통신 망의 개방화에 대한 분위기가 점차 무르익어 가고 있다. 이러한 추세에 UMTS, cdma2000, WLAN 과 같은 서로 다른 방식의 무선 액세스 망으로부터 요구되는 무선인터넷 접속 요구를 하나의 통로로 연결하고 수용할 수 있는 모바일 액세스 통합 게이트웨이가 필요하다. 본 논문에서는 차세대 네트워크 발전 방향과 이동통신 망 개방의 흐름에 맞추어 동기식 망과 비동기식 IMT-2000 망에서 동시에 무선인터넷 서비스 접속을 제공하는 통합 게이트웨이 시스템(A-MiDAS)을 개발하기 위한 형상 설계 방법과 시스템 개발 시 고려사항 등에 대해서 기술한다.

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Effects of Non-Steroidal Anti-Inflammatory Drugs on the FMLP-Induced Migration of Neutrophil (비스테로이드성 항염증제가 FMLP에 의한 사람 중성구의 이동에 미치는 영향)

  • Kim, Woo-Mi;Kang, Koo-Il
    • The Korean Journal of Pharmacology
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    • 제30권1호
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    • pp.137-143
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    • 1994
  • Enhancement or diminution of leukocyte migration to the specific site might be important factors for the development of inflammatory diseases. To investigate the effects of non-steroidal anti-inflammatory drugs (NSAIDs) on chemotaxis of neutrophil, we obtained neutrophils by Hypaque-Ficoll step gradient centrifugation and tested the effects of seven drugs on the n-formyl-leucyl-phenylalanine (FMLP)-induced migration of neutrophil using a 48-well micro chemotaxis assembly. Oxyphenbutazone, phenylbutazone, sulindac, zomepirac, and ibuprofen suppressed the migration of neutrophil at the therapeutic concentrations, however, indomethacin showed stimulation effect. IC50s for inhibition of neutrophil migration by these drugs are less than 100uM. When drugs were preincubated with FMLP, no inhibition on migration of neutrophil was observed. These results indicated that inhibitory effects of these drugs on migration of neutrophil might be related to the receptor sites of neutrophil rather than molecular inactivation of chemoattractant (FMLP). In conclusion, we suggested that the property of inhibition effects on neutrophil migration of several NSAIDs might be another mode of pharmacological action for anti-iflammatory effect, which showed significant effects at concentrations below therapeutic levels, in addition to cyclooxygenase inhibition.

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Corridor and Network Analyses of Forest Bird Habitats in a Metropolitan Area of South Korea (수도권 지역 산림성 조류 서식지의 통로와 연결망 분석)

  • Kang, Wanmo;Park, Chan-Ryul
    • Korean Journal of Agricultural and Forest Meteorology
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    • 제17권3호
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    • pp.191-201
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    • 2015
  • Measuring and mapping connectivity among habitats is a key component of sustainable urban planning and design process. In this study, we examined how functional corridors connect forest bird habitats in a metropolitan area of Korea using graph theory-based techniques. High-quality forest habitat was defined as a function of forest cover, presence of residential areas, and road networks. We then constructed a network of high-quality forest habitats using the FunConn (functional connectivity) tools, and computed metrics ($T_i$) of patch importance based on the minimum ($Q_1$) and the 25th percentile ($Q_{25}$) rank least-cost distance values. We investigated the relative influence of two values of patch importance on forest bird species richness. As a result, the patch importance index based on the $Q_{25}$ effective distance threshold was most positively correlated with species richness (P < 0.001) after controlling for the area effect. Thus, using the $Q_{25}$ effective distance threshold, we mapped not only the locations of important habitat patches and functional corridors, but also the network backbone of forest bird habitats. The network developed in this study can help guide urban planning for biodiversity conservation.

Analysis of Ambivalence Differences among Groups for Temporary Firefighting Facilities of Workers at Construction Sites (공사현장 근로자의 임시소방시설에 대한 집단 간 Ambivalence 차이분석)

  • Moon, Pil-Jae;Kong, Ha-Sung
    • The Journal of the Convergence on Culture Technology
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    • 제7권4호
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    • pp.765-778
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    • 2021
  • The purpose of this study is to prevent fire accidents in advance by deriving prior knowledge among groups about temporary fire-fighting facilities of workers at construction sites and devising appropriate improvement measures. The findings are as follows.First, in the case of fire extinguishers, statistical attention was paid to the contractor, supervisor, partner worker and fire extinguisher manager between designations. 87% of fire managers and 70% of facility supervisors said fire extinguisher management managers needed to be designated for each type of construction, which requires designation of fire extinguisher management managers, frequently checking and relocating. Second, in the case of simple fire extinguishing facilities, statistical attention was paid to the application of penalties for unauthorized use of fire extinguishing facilities with construction companies, supervisors, and business partners.Third, in the case of emergency alarm measures, statistical attention was paid to the application of emergency alarm sound to temporary broadcasting facilities with construction works, supervisors, and business partners.Fourth, in the case of induction, statistical attention was paid to the application of connection between construction works, supervisors, and partner workers, such as passage guidance, emergency lighting, etc.It was found that 65% of construction workers and 55% of electrical workers had different applications such as aisle guidance and emergency lighting for each type of business partner. In order to resolve blind spots such as evacuation zone guidance due to the structure of the building, it is necessary to easily distinguish the direction of the entrance door from a long distance by applying it in conjunction with passage guidance lights and emergency lighting.

Characterization of the Stretch-Activated Channel in the Hamster Oocyte (햄스터난자에서 신전에 의해 활성화되는 통로의 성상)

  • Kim, Y.-M.;Hong, S.-G.
    • Journal of Embryo Transfer
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    • 제19권2호
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    • pp.89-99
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    • 2004
  • Stretch-activated channels (SACs) responds to membrane stress with changes in open probability (Po). They play essential roles in regulation of cell volume and differentiation, vascular tone, and in hormonal secretion. SACs highly present in Xenopus oocytes and Ascidian oocytes are suggested to be involved in the regulation of pH and fluid transport to balance the osmotic pressure, but remain unclear in mammanlian oocytes. This study was investigated to find the presence of SACs in hamster oocytes and to examine their electrophysiological properties. To infer a role of SAC in relation to the development of early stage, we followed up to the stage of two-cell zygote with patch clamp techniques. Single channels were elicited by negative pressure (lower than ­15 cm$H_2O$). Interestingly, SACs were dependent on permeable cations such as $Na^+$ or $K^+$. As permeable cation removed from both sides across the membrane, SAC activity completely disappeared. When permeable cations present only in intracellular compartment, outward currents appeared at positive potentials. In contrast to this, inward currents occurred only at the negative voltage when permeable cation absent in cell interior. These result suggests that SAC carry cations through the nonselective cation channel (NSC channel). Taken together, we found that stretch activated channels present in hamster oocyte and the channel may carry cations through NSC channels. This stretch activated-NSC channels may play physiological role(s) in oocyte growth, maturation, fertilization and embryogenesis in fertilized oocytes to two-cell zygotes of hamster.

Development of Vascular Bundles in the Peduncle of Different Tillers and its Relationship to Panicle Characteristics in Rice (벼 이삭줄기의 유관속발육과 이삭특성과의 관계)

  • Lee, Dong-Jin;Benito S. Vergara;Oscar B. Zamora;Kim, Bong-Ku;Chae, Je-Cheon
    • KOREAN JOURNAL OF CROP SCIENCE
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    • 제37권2호
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    • pp.155-165
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    • 1992
  • Experiments were conducted to determined the development of the vascular bundles in the peduncle of different tillers on its development in order to improve the vascular system and possibly increase grain yield. The development of the vascular bundle in the leaf, stem and panicle is an important aspect of assimilate translocation and differentiation of panicle characters. Two cultivars were used in this study: IR58, an indica type, and Unbong 7, a japonica type. The main culm(M) had more and bigger vascular bundles in the peduncle and those vascular bundle decreased with tiller order and tiller development. In the primary tillers, P1 had more large and small vascular bundles than P5 in both cultivars. IR58 developed more large vascular bundles compared to Unbong 7, but the small vascular bundle in unbong 7 was more than in IR58. The cross sectional area of phloem and xylem in large vascular bundle decreased with tiller order in both cultivar. Larger area of phloem and xylem in the early formed tillers more efficient transport of assimilates. The number of spikelets, the weight of panicle and grain yield per panicle were highest in the main culm followed by the order of their initiation or emergence. The number of primary and secondary branches to be positive associated with the number and area of vascular bundles. Furthermore, the number of vascular bundles in the peduncle was highly correlated with the peduncle thickness which in turn was correlated with the number of primary and secondary branches on the panicle. These results showed tillers that are initiated early and have relatively ation usually have more vascular bundles, larger peduncle, more spikelets spike let filling and ultimately higher yield.

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