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Flow Balancing Hardware for Parallel TCP Streams on Long Fat pipe Network
Yutaka Sugawara,Mary Inaba,Kei Hiraki 보안공학연구지원센터 2008 International Journal of Software Engineering and Vol.2 No.2
Parallel TCP streams are used for data transfer between clusters in today's high performance applications. When parallel TCP streams are used on LFN, part of streams fail to get enough bandwidth because of congestion generated by the parallel TCP streams themselves [5]. As a result, data transfer throughput is bottlenecked by the slow streams. In this paper, we propose the Stream Harmonizer that schedules packet transmission of parallel TCP streams to balance the bandwidth. The purpose of the Stream Harmonizer is to reduce the congestion that is generated by the parallel TCP streams themselves to improve the performance of the slow streams. The Stream Harmonizer reduces congestion by reducing the bandwidth of fast streams by increasing the round trip time (RTT) of them. A hardware based lightweight scheduling algorithm is used to realize wire-rate intensive scheduling at highspeed backbone network. The Stream Harmonizer is able to schedule packets without exchanging additional information with end hosts. In this paper, we implement the Stream Harmonizer using TGNLE-1, an FPGA (Field Programmable Gate Array) based 10Gbit Ethernet experimental testbed. In addition, we evaluate the Stream Harmonizer using an FPGA based network emulator.
Interventional management for postoperative arterial bleeding in gastrointestinal surgery
Yozo Sato,Kiyoshi Matsueda,Marie Osawa,Yoshitaka Inaba,Yu Takahashi,Yosuke Inoue,Atsushi Oba,Yosuke Fukunaga,Yasuhiro Shimizu 소화기인터벤션의학회 2022 Gastrointestinal Intervention Vol.11 No.4
Postoperative arterial bleeding after gastrointestinal surgery is a potentially fatal complication. Transcatheter arterial embolization is considered the first-line treatment because of efficacy and less invasiveness despite the risk of organ infarction. With the recent advances in endovascular devices, stent-graft placement, which can preserve arterial flow, has been an alternative treatment option in patients with extrahepatic artery hemorrhage. Moreover, clinical outcomes of stent-graft placement for pseudoaneurysms in relative long term have been reported recently. Herein, we review the techniques and clinical outcomes for interventional management for postoperative arterial bleeding.
Interventional management for postoperative arterial bleeding in gastrointestinal surgery
Yozo Sato,Kiyoshi Matsueda,Marie Osawa,Yoshitaka Inaba,Yu Takahashi,Yosuke Inoue,Atsushi Oba,Yosuke Fukunaga,Yasuhiro Shimizu 소화기인터벤션의학회 2022 International journal of gastrointestinal interven Vol.11 No.4
Postoperative arterial bleeding after gastrointestinal surgery is a potentially fatal complication. Transcatheter arterial embolization is considered the first-line treatment because of efficacy and less invasiveness despite the risk of organ infarction. With the recent advances in endovascular devices, stent-graft placement, which can preserve arterial flow, has been an alternative treatment option in patients with extrahepatic artery hemorrhage. Moreover, clinical outcomes of stent-graft placement for pseudoaneurysms in relative long term have been reported recently. Herein, we review the techniques and clinical outcomes for interventional management for postoperative arterial bleeding.