http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jieun Yu,Myeonghwan Choi,Dong-Yurl Yu,Won Sik Hong,Cheolho Park,강남현 대한금속·재료학회 2023 ELECTRONIC MATERIALS LETTERS Vol.19 No.3
The predicted growth behavior of intermetallic compound (IMC) induced by electromigration of a Cu/organic solderabilitypreservative (OSP)/Sn-2.5Ag solder/electroless nickel electroless palladium immersion gold (ENEPIG)/Cu joint was calculatedfor a current density of 14 kA/cm 2 and current application time of 600 h and validated experimentally. Under as-refl owconditions, thin Cu 3 Sn and scallop-shaped Cu 6 Sn 5 layers were produced near the OSP interface, and a (Cu, Ni) 6 Sn 5 layer wasformed near the ENEPIG interface. Cu 6 Sn 5 islands and Ag 3 Sn with a β-Sn matrix were formed in the solder. The mobilitiesof Cu, Ni, and Sn atoms at the OSP and ENEPIG interfaces were calculated, and a relationship was found between IMCthickness and current application time. Under electron fl ow from the OSP to ENEPIG interface, the predicted total thickness(26.6 μm) of the IMCs (Cu 3 Sn, Cu 6 Sn 5 , and (Cu, Ni) 6 Sn 5 ), was in agreement with the experimental value (24.7 μm). With electron fl ow reversed, the predicted IMC thickness (14.2 μm) was similar to the experimental value (13.2 μm). Theapplication of current during electromigration only coarsened Cu 6 Sn 5 , regardless of the direction of electron fl ow. Finally,the Ni plating layer on the ENEPIG surface fi nish prevented the diff usion of Cu and suppressed electromigratory IMC growthby approximately 50%.
Topology Control in Cooperative Wireless Ad-Hoc Networks
Jieun Yu,Heejun Roh,Wonjun Lee,Sangheon Pack,Ding-Zhu Du IEEE 2012 IEEE journal on selected areas in communications Vol.30 No.9
<P>Topology control is to determine the transmission power of each node so as to maintain network connectivity and consume the minimum transmission power. Cooperative Communication (CC) is a new technology that allows multiple nodes to simultaneously transmit the same data. It can save transmission power and extend transmission coverage. However, prior research work on topology control considers CC only in the aspect of energy saving, not that of coverage extension. We observe that CC can bridge (link) disconnected networks and therefore identify the challenges in the development of a centralized topology control scheme, named shape Cooperative Bridges, which reduces transmission power of nodes as well as increases network connectivity. We propose three algorithms that select energy efficient neighbor nodes, which assist a source node to communicate with a destination node: an optimal method and two greedy heuristics. In addition, we consider a distributed version of the proposed topology control scheme. Our findings are substantiated by an extensive simulation study, through which we show that the shape Cooperative Bridges scheme substantially increases the connectivity with tolerable increase of transmission power compared to other existing topology control schemes, which means that it outperforms in terms of a connectivity-to-power ratio.</P>
Topology Control for Increasing Connectivity in Cooperative Wireless Ad Hoc Networks
YU, Jieun,ROH, Heejun,CAO, Jun,PACK, Sangheon,LEE, Wonjun,DU, Ding-Zhu,HONG, Sangjin (Stephen) The Institute of Electronics, Information and Comm 2010 IEICE TRANSACTIONS ON COMMUNICATIONS - Vol.93 No.4
<P>We propose a novel topology control scheme that reduces the transmission power of nodes and increases the network connectivity, based on the fact that Cooperative Communication (CC) technology can bridge disconnected networks. Simulation results demonstrate that our scheme greatly increases the connectivity for a given transmission power, compared to other topology control schemes.</P>
Yu Jieun,Shin Byung-Cheul,Kim Hyunmin,Hyun Eunhye,Lee Jin-Ho,Kim Me-Riong,Lim Byungmook 한국한의학연구원 2022 Integrative Medicine Research Vol.11 No.1
Background: Chuna Manual Therapy (CMT) has been widely used in Korea, and coverage in Korean National Health Insurance (NHI) was finally implemented in 2019. The objectives of this study were to analyze the process of NHI coverage for CMT qualitatively, and to summarize important roles, streams, and implications regarding its inclusion in the modern public health insurance system. Methods: Related literature was collected and 8 key personnel involved in the policy-making process were qualitatively interviewed, and Zahariadis’ version of the Multiple Streams Framework (MSF) was applied to analyze the policy agenda setting and the roles of stakeholders. Results: Through the collaborative efforts of various stakeholders, a pilot coverage project for CMT was implemented in 2017, and coverage was expanded nationwide in 2019. MSF showed that it was mainly achieved through three streams: governmental change (political stream), demand from the general public and KM doctors (problem stream), and strengthening/reinforcement of the feasibility and acceptability of the policy (policy steam). Also, the roles of policy entrepreneurs and resulting changes were shown to be significant for the overall process. Conclusion: NHI coverage for CMT was realized through collective policy and research efforts from the government and academic sectors. The roles of stakeholders were shown to be significant in the overall process, and documentation of their involvement is hoped to be of use of other countries that utilize traditional and/or manual medicine. Background: Chuna Manual Therapy (CMT) has been widely used in Korea, and coverage in Korean National Health Insurance (NHI) was finally implemented in 2019. The objectives of this study were to analyze the process of NHI coverage for CMT qualitatively, and to summarize important roles, streams, and implications regarding its inclusion in the modern public health insurance system. Methods: Related literature was collected and 8 key personnel involved in the policy-making process were qualitatively interviewed, and Zahariadis’ version of the Multiple Streams Framework (MSF) was applied to analyze the policy agenda setting and the roles of stakeholders. Results: Through the collaborative efforts of various stakeholders, a pilot coverage project for CMT was implemented in 2017, and coverage was expanded nationwide in 2019. MSF showed that it was mainly achieved through three streams: governmental change (political stream), demand from the general public and KM doctors (problem stream), and strengthening/reinforcement of the feasibility and acceptability of the policy (policy steam). Also, the roles of policy entrepreneurs and resulting changes were shown to be significant for the overall process. Conclusion: NHI coverage for CMT was realized through collective policy and research efforts from the government and academic sectors. The roles of stakeholders were shown to be significant in the overall process, and documentation of their involvement is hoped to be of use of other countries that utilize traditional and/or manual medicine.
Yu, Jieun,Lee, Hyuk-Joon,Hur, Keun,Kwak, Mi Kyung,Han, Tae Su,Kim, Woo Ho,Song, Soo-Chang,Yanagihara, Kazuyoshi,Yang, Han-Kwang M. Nijhoff ; Kluwer Academic Publishers 2012 Investigational new drugs Vol.30 No.1
<P>The prognosis of peritoneal carcinomatosis is regarded as poor because safe, effective therapeutic modalities are lacking. Intraperitoneal chemotherapy is one treatment option, involving the delivery of a high concentration of chemotherapeutic drugs into the abdominal cavity, but the severe side effects associated with such treatment are a major obstacle in clinical application. We evaluated the anti-cancer effects of intraperitoneal delivery of a thermosensitive polymeric hydrogel containing chemotherapeutics in an animal model of carcinomatosis. The progress of peritoneal carcinomatosis, introduced by injecting a luciferase-transfected human gastric cancer cell line (HSC44Luc) into the peritoneal cavity of nude mice, was quantitatively evaluated by in vivo bioluminescence imaging. Three days after intraperitoneal (IP) injection of HSC44Luc cells, treatment solutions were injected into the peritoneal cavity. Mice were categorized into four groups depending on treatment method; these were (1) a control PBS group (n?=?5), (2) a hydrogel-only group (n?=?5), (3) a paclitaxel solution (30?mg/kg) group (n?=?3), and (4) a hydrogel-with-paclitaxel (15?mg/kg) group (n?=?5). Quantitative photon counting was performed weekly in each animal. Mice were sacrificed on the 5th or 28th day after treatment, for pathologic evaluation. In vivo bioluminescence imaging showed that photon counts in the hydrogel-with-paclitaxel and paclitaxel solution groups were significantly lower than in the PBS group over the entire experimental period. Although neither group of responding mice showed any peritoneal nodules on the 28th day after treatment, only the paclitaxel solution group exhibited dilated edematous changes in the intestine; these side effects were absent in animals treated with hydrogel-with-paclitaxel group. In conclusion, a thermosensitive hydrogel containing paclitaxel may be a safe and effective treatment option for peritoneal carcinomatosis.</P>