• Title/Summary/Keyword: rerouting

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Reconstruction of the Finger using Rerouting the Transverse Digital Palmar Arch in the Crushing or Avulsion Injured Finger (짓니긴 및 벗겨진 손상에서 가로손가락손바닥활을 이용한 손가락 재건)

  • Choi, Hwan-Jun;Lee, In-Soo;Choi, Chang-Yong;Kim, Mi-Sun;Kim, Jun-Hyuk
    • Archives of Plastic Surgery
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    • v.37 no.1
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    • pp.59-66
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    • 2010
  • Purpose: In the finger, there are three major palmar arches in the arterial system. The location of this arches are constant. The middle and distal transverse arches are consistently large (almost 1 mm) and may be used for arterial vessel repairs either proximally or distally, depending on the length and direction needed. This paper describes our experiences in reconstruction and replantation of the finger using rerouting the transverse digital palmar arch. Methods: 31 patients with injuries according to our classification were treated from March of 2005 to October of 2008. In this study the authors subdivided injuries into those with amputation distal to the insertion of the flexor digitorum profundus (Class I, 31 fingers); those with amputation distal to the insertion of the flexor digitorum superficialis (Class II, 4 fingers). Replantation was performed using the artery-only technique with neither vein nor nerve repair. Because the artery has been damaged, it is still possible to make a direct suture by transposing the arterial arch in an inverted Y to I arterial configuration or converting the arch. Venous drainage was provided by an external bleeding method with partial nail excision, medical leech, and repaired margin. Results: The success rate was 87% (n=27) in class I and 75% (n=4) in class II. The authors conclude that crushing and complete avulsion injuries & amputations are salvageable, with acceptable functional results in select patients, especially those with amputation distal to the insertion of the flexor digitorum superficialis. Conclusion: We performed replantation and reconstruction with only-arterial transposing anastomosis successfully, resulting in good recovery of aesthetic and functional outcome. Three major digital palmar arches, especially distal two branches, give us additional treatment options. In the finger replantation and reconstructive techniques using rerouting healthy the transverse digital palmar arch increase the survival rate of the finger.

Performance Evaluation of a Distributed Restoration Algorithm for All-optical Networks (전광 전달망 장애 복구 알고리듬의 성능 분석)

  • Joo, Un-Gi;Lee, Jong-Hyun
    • IE interfaces
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    • v.14 no.2
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    • pp.148-157
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    • 2001
  • This paper considers a network restoration algorithm for all-optical WDM networks. As the increasing traffic and transmission speed, any failure on the networks will lead to loss of huge data and disruption of the services. Therefore, a network restoration algorithm is necessary for the high-speed all-optical networks. This paper suggests a distributed restoration algorithm for line or channel level failures under the dynamic rerouting. For the algorithm, some measures for performance evaluation are explicitly derived and simulation studies are exploited to evaluate its usability by SLAM(Simulation Language for Alternative Modeling) II.

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Trump Tariffs and Roundabout Trade

  • TADASHI ITO
    • KDI Journal of Economic Policy
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    • v.46 no.3
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    • pp.25-47
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    • 2024
  • Although there are many news articles of tariff dodging via the rerouting of made-in-China goods through third countries, relabeling these goods as made in Mexico or made in Vietnam, there have been no scientific studies on this issue. This paper provides statistical evidence regarding whether such practices are taking place. Using monthly trade statistics at the most disaggregated level and analyzing data up to 2019, the year before the COVID-19 shock, little evidence of roundabout trade is found. With an extended dataset up to 2023, overall there is little sign of roundabout trade, although some slight signs of roundabout trade are found for Mexico and Vietnam.

Two-Disjoint Path Problem in LSI Layout CAD (LSI의 레이아웃 CAD에 있어서 2 -독립 경로 문제)

  • 정대화
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.19 no.6
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    • pp.62-66
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    • 1982
  • A method finding out routability for unrouted signal lines and rerouting those which are turned out to be able to route in layout design of LSI is described. In this paper the problems of finding two-disjoint Paths represented by an undirected graph G=(V,E), where V,E are sets of vertices and edges respectively, are studied. The existence of two-disjoint paths from s1, to t1, (called P1) and from S2 to T2 (called P2) indicated by the four vertices on the graph s1, t1, s2, t2 $\in$ V means that two distinct signal lines exist in layout design. It turns out that the proposed time complexity in the algorithm is O (IVI x IEI).

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A Flexible Handover Scheme for Supporting Seamless Real-Time Services in Wireless Network (무선망에서 끊김 없는 실시간 서비스 제공을 위한 유연성 있는 핸드오버 기법)

  • Cho, Sung-Hyun;Pakr, Sung-Han
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.37 no.1
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    • pp.23-31
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    • 2000
  • In this paper, we propose an adaptive handover scheme in wireless network. The proposed handover scheme is a hybrid type of virtual path extension and rerouting. The proposed handover scheme chooses the virtual path management scheme according to the service QoS instead of the network topology which is used in the previous hybrid handover schemes. The proposed scheme supports the seamless service and small buffering during virtual path rerouting handover through the multicasting service. To evaluate the performance of the proposed scheme, we computed the number of signaling message used for handover and perform computer simulation. The simulation results show that the proposed scheme provides more efficiency in the handover delay and seamless service than the previous methods.

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Persistent Left Sperior Vena Cava Draining into the Left Atrium with Absent Right Superior Vena Cava in Tetralogy of Fallot (우측상대정맥 없이 좌측 상대정맥이 좌심방으로 유입되는 활로씨 사징증의 수술치험 1례)

  • Kim, Hyuk;Kim, Byoung-Il;Kim, Nam-Su;Kim, Young-Hak;Chung, Won-Sang;Kang, Jung-Ho;Jee, Heng-Ok;Lee, Chul-Bum;Jeon, Seok-Chol
    • Journal of Chest Surgery
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    • v.32 no.12
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    • pp.1115-1117
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    • 1999
  • A persistent left superior vena cava draining into the coronary sinus is the most benign and widely encountered abnormality and can easily be explained embryologically as the persistence of the usual pattern of vnous circulation in the embryo,. However a persistent left superior vena cava draining into the left atrium with absent right superior vena cava is an extremely rare anomaly. We report this situation in an infant with tetralogy of Fallot. The most common approach has traditionally been intraatrial baffle repair to create a tunnel to the right atrium or rerouting of the left superior vena cava flow by directly anastomosing the left superior vena cava to the right atrium In the present study the left superior vena cava was transposed to the left pulmonary artery after the correction of tetralogy of Fallot. The most common approach has traditionally been intraatrial baffle repair to create a tunnel to the right atrium or rerouting of the left superior vena cava flow by directly anastomosing the left superior vena cava to the right atrium. In the present study the left superior vena cava was transposed to the left pulmonary artery after the correction of tetralogy of Fallot.

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One Step Incremental Re-establishment Scheme for Connection Rerouting in Wireless ATM WANs (광역 무선 ATM 네트웍에서 한 단계로 수행되는 점진적 경로 재 설정 기법)

  • Sin, Gyu-Yong;Gwon, Wi-Nam;Gwon, Bo-Seop;Yun, Yun-Su
    • Journal of KIISE:Information Networking
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    • v.27 no.4
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    • pp.396-406
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    • 2000
  • 유선 네트웍과는 달리 무선 네트웍에서는 단말기들이 이동하기 때문에 핸드오버가 발생한다. ATM네트웍은 연결 지향통신을 하기 때문에 핸드오버가 발생하면 통신을 위한 경로를 재 설정해 주어야 한다 높은 서비스 품질을 제공하기 위해 요구되는 빠르고 효율적이며 끊김이 없는 경로 재 설정방법으로 두 단계(사용중인 경로에서 새로운 경로와의 접합점인 크로스오버 스위치)를 찾는 단계와 찾아진 크로스오버 스위치까지 새로운 경로를 설정하는 단계로 이루어지기 때문에 핸드오버 지연시간이 길고 시그널링 부담이 크다. 본 논문은 핸드오버 지연 시간을 줄이고 시그널링 부담을 최소화하기 위해 경로설정을 위한 시그널링 메시지에 기존의 경로 정보를 포함시킴으로써 크로스오버 스위치의 탐색과 부분 경로 재 설정을 한 단계로 단일화하는 기법을 제안한다. 또한 시뮬레이션을 통해 기존의 방법과 비교 평가함으로써 제안하는 기법이 핸드오버 지연 시간과 시그널링 부담을 줄였음을 보인다.

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Design for reduction EMI of flyback switching power supply

  • Theirakul, Chaivat;Prempraneerach, Yothin
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.1891-1895
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    • 2003
  • Switch-mode power supplies (SMPS) have become a major source of conducted electromagnetic interference (EMI) which is the combination between differential mode (DM) noise and common mode (CM) noise. This paper presents the conducted EMI reduction approach in flyback switched mode power supply by rerouting for circuit balance to reduce common mode noise. And differential mode noise can be reduce by adding $c_x$ capacitor across the input power line, and passive element to the gate drive of switching device MOSFET to slow down the switching times. This combination of our approach is the effective way to reduce the conducted EMI and it is also a cost effective for product design

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A Medium Access Control Scheme for Reducing Energy Consumption through Avoiding Receipt of Redundant Messages in Wireless Sensor Networks (무선 센서 네트워크에서 중복 메세지 순신 회피를 통한 에너지 소비절감 매체 접근 제어)

  • Han, Jung-An;Lee, Moon-Ho
    • Journal of Information Technology Applications and Management
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    • v.12 no.4
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    • pp.13-24
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    • 2005
  • The sensor network is a key component of the ubiquitous computing system which is expected to be widely utilized in logistics control, environment/disaster control, medical/health-care services, digital home and other applications. Nodes in the sensor network are small-sized and exposed to adverse environments. They are demanded to perform their missions with very limited power supply only. Also the sensor network is composed of much more nodes than the wireless ad hoc networks are. In case that some nodes consume up their power capacity, the network topology should change, and rerouting/retransmission is necessitated. Communication protocols studied for conventional wireless networks or ad hoc networks are not suited for the sensor network resultantly. Schemes should be devised to control the efficient usage of node power in the sensor network. This paper proposes a medium access protocol to enhance the efficiency of energy consumption in the sensor network node. Its performance is analyzed by simulation.

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Dynamic resource reservation scheme for connection rerouting on ATM-based PCN (ATM-based PCN에서의 연결재라우팅을 위한 유선망자원 예약방안)

  • 장경훈;심재정;김덕진;강경훈
    • Journal of the Korean Institute of Telematics and Electronics S
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    • v.34S no.2
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    • pp.11-20
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    • 1997
  • It is a recent trend that mobile communications and PCS are intergrated into the broadband network. Broadband mutlimedia traffic will be transported over the integrated network. In this paper, we propose a connection re-routing method for fast inter-switch hadoffs and dynamic resurce reservation scheme, which is based on the proposed re-routing method, for the ATM-based personal communications network. To reduce the delay for re-routing method, for the ATM-based personal communications network. To reduce the delay for re-routing, the proposed re-routing method is to reserve VPI/VCIs for possible inter-swich handoff calls in advance. Our reservation scheme is to statistically reserve the fixed resources for possible inter-switch handoff calls, according to the QoS of the handoff calls. The simmulation reslts show that our proposed scheme satisfies the required QoS of handoff calls and keep the dropping probability of handoff calls lower than other schemes.

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