Browsing by Issue Date, starting with "2020-02-27"

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劉冠澤、陳彥儒同學分獲「醫學生暑期研究計畫」競賽亞軍、傑作
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
由健康科學文教基金會與國家衛生研究院合辦之「第14屆醫學系學生暑期研究計畫」，日前公布競賽結果，本校醫學系五年級劉冠澤同學...
大手牽小手，青幼社反毒宣導
(國立陽明大學, 2020-02-27)
陳念平
;
陽明電子報編輯小組
依稀記得一次與教官的談話中，被問了一句：「念平，聽說你們青幼社專門帶國小生，那願不願意一起去石牌國小宣導反毒教育？」「好啊！當然可以！」雖然這件事情有點突然，但我還是馬上答應了！能向國小生宣導極為重要的反毒教育，對我們青幼社的夥伴們來說，是一件好玩又有意義的活動！
【生技醫療創新創業講座】知己知彼的募資準備
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
【健康一體研究中心演講】
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
科技部「愛因斯坦培植計畫」，神研所郭曉縈研究員入選
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
本校神經科學研究所研究員郭曉縈博士，專注於大腦基底核的神經系統研究，研究成果豐碩，陸續發表於”Nature Neuroscience”、”FA...
台灣腫瘤分割挑戰賽，陽明醫學系團隊獲第二
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
本校醫學系五年級高家祥、郭宜欣與黃玠淳同學組成的「Very Good Tumor」團隊，參加「第二屆台灣腫瘤分割挑戰賽」，使用預訓練（pr...
我們在同個世界中，共享健康
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
沒有什麼事情能夠比今年武漢新型冠狀病毒（COVID-19）疫情更能夠說明「One World, One Health」這個理念。就像當年金恩博士說的一...
【防疫大作戰，全民動起來】～防疫知識英語口說大賽
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
激勵工作士氣，優秀行政人員獲表揚
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
為激勵行政人員工作士氣，人事室於2月25日舉行「108年度優秀行政服務人員頒獎典禮」，表揚本年度「最佳服務獎」與「工作績優獎」...
【神研所40週年系列講座】
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
面對新冠肺炎，我可以有什麼準備？
(國立陽明大學, 2020-02-27)
王詠瑩
;
陽明電子報編輯小組
港澳生檢疫期滿，3/2順利開學
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
陽明即將於3月2日開學，近20名已抵台返校的港澳生，2月25日已完成14天居家檢疫。學校防疫小組指揮官郭旭崧校長與副指揮官蕭志建教...
On the Reduction of O-2 on Cathode Surfaces of Co-Corrin and Co-Porphyrin: A Computational and Experimental Study on Their Relative Efficiencies in H2O/H2O2 Formation
(2020-02-27)
Huang, Wen-Fei
;
Chang, Sun-Tang
;
Huang, Hsin-Chih
;
Wang, Chen-Hao
;
Chen, Li-Chyong
The mechanisms for O-2 reduction and H2P/H2O2 formation on Co-corrin and Co-porphyrin cathode surfaces of the proton exchange membrane fuel cell (PEMFC) systems have been studied by hybrid Hartree-Fock/density functional theory (B3LYP) calculations with the LANL2DZ basis set. The calculations show that the reduced Co-corrin with a single negative charge (Co-corrin(-)) is more reactive than the neutral Co-corrin and the doubly charged Co-corrin(2-). Both O-2 and O adsorptions are most stable on Co-corrin(-), rather than Co-corrin or Co-corrin(2-). The potential energy profiles show that the decomposition of O-2 on both Co-corrin and Co-corrin(-) can take place energetically favorably without thermal activation. The formation of H2O and H2O2 are predicted to occur by two separate reaction paths: the HO path and the HOO path. The HO path with H2O as the predominant product on the reduced Co-corrin(-) surface, the energetically favored surface, under operational cathodic conditions, which is consistent with recent experimental findings, wherein the PEMFCs with pyrolyzed vitamin B12 containing Co-corrin as catalysts loaded at the cathode, can deliver up to 14.5 A cm(-3) at 0.8 V with IR compensation. A similar calculation performed for a Co-porphyrin system shows a significantly less efficient O-2 reduction, consistent with the experiment results of the PEMFC power output studies.
【神研所學術演講】
(國立陽明大學, 2020-02-27)
陽明電子報編輯小組
Molecular beam epitaxy preparation and in situ characterization of FeTe thin films
(2020-02-28)
Pereira, V. M.
;
Wu, C. N.
;
Liu, C. E.
;
Liao, S-S
;
Chang, C. F.
We have synthesized Fe1+y Te thin films by means of molecular beam epitaxy (MBE) under Te-limited growth conditions. We found that epitaxial layer-by-layer growth is possible for a wide range of excess Fe values, wider than expected from what is known from studies on the bulk material. Using x-ray magnetic circular dichroism spectroscopy at the Fe L-2(,3) and Te M-4(,5) edges, we observed that films with high excess Fe contain ferromagnetic clusters while films with lower excess Fe remain nonmagnetic. Moreover, x-ray absorption spectroscopy showed that it is possible to obtain films with very similar electronic structure as that of a high quality bulk single crystal Fe-1.(14) Te. Our results suggest that MBE with Te-limited growth may provide an opportunity to synthesize FeTe films with smaller amounts of excess Fe as to come closer to a possible superconducting phase.
【2020山腰電影院】～致我們的青春好動
(國立陽明大學, 2020-02-28)
陽明電子報編輯小組
【3/5生醫領航方舟～企業講座延期舉辦】
(國立陽明大學, 2020-02-29)
陽明電子報編輯小組
Highly concentrated carbonate electrolyte for Li-ion batteries with lithium metal and graphite anodes
(2020-02-29)
Xie, Jian-De
;
Patra, Jagabandhu
;
Rath, Purna Chandra
;
Liu, Weng-Jing
;
Su, Ching-Yuan
Highly concentrated lithium bis(fluorosulfonyflimide (LiFSI) salt dissolved in carbonate solvent is employed as a high-performance and robust organic electrolyte for Li-ion batteries. The influences of Li salt type, concentration, and solvent type (such as diethyl carbonate (DEC), dimethyl carbonate (DMC), and ethylene carbonate (EC)) on the electrochemical properties of Li metal and graphite anodes are systematically assessed. A superior electrolyte composition of 5.5 M LiFSI-DMC/EC is achieved, enhancing the anti-flammability, coulombic efficiency, and high rate capability. The optimal efficiency values of Li electrodeposition/stripping utilizing 5.5 M LiFSI-DMC/EC are 97.0% and 94.5% at 0.4 and 6 mA cm(-2), respectively. Such an enhanced performance is due to the formation of a three-dimensional ion network, composed of contact ion pairs (CIPs) and ion aggregates (AGGs) in the highly concentrated LiFSI electrolyte, which effectively decreases the number of free solvent molecules and inhibits the formation of undesired dendritic Li structures. Raman spectroscopy is employed to confirm the formation of CIP and AGG compounds within the electrolyte. The electrochemical data of the 5.5 M LiFSI-DMC/EC electrolyte cell demonstrates a remarkable improvement in the specific capacity and rate capability of a graphite anode.
Artificial peptide-controlled protein release of Zn2+-triggered, self-assembled histidine-tagged protein microparticle
(2020-03-01)
Chen, Tzu-Yin
;
Cheng, Wan-Jung
;
Horng, Jia-Cherng
;
Hsu, Hsin-Yun
;
交大名義發表
Protein microparticles have received attention as drug delivery systems because of their high protein stability and prolonged release in vivo. However, most current preparation processes introduce chemical crosslinkers, which often lead to protein inactivation and limit drug efficacy in delivery systems. In this study, we employed the well-known hexahistidine (His)-tag recombinant protein technology and a metal-triggerable collagen-mimetic peptide to enhance the binding strength between the protein and metal ion and fine-tuned the protein drug release. His-tagged proteins self-assembled to form microparticles (similar to 2 mu m) upon zinc ion treatment and sustained protein drug release was achieved in physiological saline. The results also indicated that by adjusting the peptide concentration and N- and C-terminal hexahistidine-tags, protein release could be controlled. Moreover, no protein denaturation was observed. We developed a universal strategy for facile protein microparticle fabrication under mild conditions and we demonstrated its potential as a therapeutics formulation with tunable protein release.
Cost minimization in placing service chains for virtualized network functions
(2020-03-01)
Wang, Chien Ting
;
Lin, Ying-Dar
;
Wang, Chih-Chiang
;
Lai, Yuan-Cheng
;
交大名義發表
Network function virtualization (NFV) places network functions onto the virtual machines (VMs) of physical machines (PMs) located in data centers. In practice, a data flow may pass through multiple network functions, which collectively form a service chain across multiple VMs residing on the same or different PMs. Given a set of service chains, network operators have two options for placing them: (a) minimizing the number of VMs and PMs so as to reduce the server rental cost or (b) placing VMs running network functions belonging to the same service chain on the same or nearby PMs so as to reduce the network delay. In determining the optimal service chain placement, operators face the problem of minimizing the server cost while still satisfying the end-to-end delay constraint. The present study proposes an optimization model to solve this problem using a nonlinear programming (NLP) approach. The proposed model is used to explore various operational problems in the service chain placement field. The results suggest that the optimal cost ratio for PMs with high, hybrid, and low capacity, respectively, is equal to 4:2:1. Meanwhile, the maximum operating utilization rate should be limited to 55% in order to minimize the rental cost. Regarding quality of service (QoS) relaxation, the server cost reduces by 20%, 30%, and 32% as the end-to-end delay constraint is relaxed from 40 to 60, 80, and 100 ms, respectively. For the server location, the cost decreases by 25% when the high-capacity PMs are decentralized rather than centralized. Finally, the cost reduces by 40% as the repetition rate in the service chain increases from 0 to 2. A heuristic algorithm, designated as common sub chain placement first (CPF), is proposed to solve the service chain placement problem for large-scale problems (eg, 256 PMs). It is shown that the proposed algorithm reduces the solution time by up to 86% compared with the NLP optimization model, with an accuracy reduction of just 8%.