Browsing by Issue Date, starting with "2020-02-15"

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Fabrication of TiO2-coated nanostructured Ni foams for improved mechanical properties
(2020-02-15)
Hung, Pei-Sung
;
Chou, Yu-Szu
;
Wang, Guang-Ren
;
Chung, Wei-An
;
Wu, Pu-Wei
We demonstrate a composite approach to improve the mechanical strength of nanostructured Ni foams by producing a conformal coating of TiO2 on the skeletons of the Ni foam. The nanostructured Ni foam is fabricated by a template approach in which colloidal crystals of polystyrene microspheres in 720 nm diameter are constructed by a vertical electrophoresis process, followed by electroplating of Ni to fill the interstitial voids among the closely-packed microspheres and removal of the colloidal template afterward. The formation of TiO2 overcoat is achieved by optimization of sol-gel synthesis to prepare desirable TiO2 sols and their subsequent electrophoresis toward the nanostructured Ni foam in a square wave pulsing mode. The thickness of the TiO2 deposit is proportional to the duration of pulsing electrophoresis. From nano-indentation, the TiO2 -coated nanostructured Ni foams exhibit notable improvements in hardness (53-68%) and reduced elastic modulus (26-37%) over those of pristine nanostructured Ni foams. This strategy of implementing a thin ceramic overcoat provides an effective mean to improve the mechanical properties of nanostructured metals.
《聲之形》（A Silent Voice）
(國立陽明大學, 2020-02-15)
黃柏威
;
陽明電子報編輯小組
榮陽交成立「新型冠狀病毒研發聯盟」，投入快篩試劑與藥物研發
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
為支援全球面對2019新型冠狀病毒（2019-nCoV）防疫需求，陽明與交通大學、臺北榮民總醫院2月6 日成立研發聯盟，將結合產業，首先...
牙醫學院院長交接，張國威教授出任新院長
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
牙醫學院2月3日舉行交接典禮，原任的許明倫院長功成身退，由牙醫系張國威特聘教授接任第七任院長。新任的張國威院長表示，43年前...
【2020春季智齡講堂】
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
【腦科所學術演講系列】
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
【愛心口罩運動】～讓我們把「口罩」捐給需要的人
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
Simultaneous detection of two growth factors from human single-embryo culture medium by a bead-based digital microfluidic chip
(2020-02-15)
Lee, Meng-Shiue
;
Hsu, Wensyang
;
Huang, Hong-Yuan
;
Tseng, Hsueh-Yang
;
Lee, Chia-Tung
The measurement of growth factors released in a culture medium is considered to be an attractive non-invasive approach, apart from the embryo morphology, to identify the condition of an embryo development after fertilization in vitro (IVF), but the available embryo culture medium in the current method is only a few microlitres. This small sample volume, also of small concentration, makes difficult the application of a conventional detection method, such as an enzyme-linked immunosorbent assay (ELISA). A reliable detection of the growth factor from each embryo culture medium of such a small concentration hence remains a challenge. Here for the first time we report the results of measurement of not just one, but two, growth factors, human IL-1 beta and human TNF-alpha, from an individual droplet of embryo culture medium with a bead-based digital microfluidic chip. The required sample volume for a single measurement is only 520 nL; the total duration of the on-chip process is less than 40 min. Using the culture media of human embryos with normal morphologic features, we found that the concentrations of TNF-alpha change little from day 3 to day 5-6, but the concentrations of IL-1 beta for some embryos might double from day 3 to day 5-6. For other embryos even with similar normal morphologic features, some growth factors, such as IL-1 beta, might exhibit different expressions during the culture period. Those growth factors could serve to distinguish the development conditions of each embryo, not merely from an observation of embryo morphology.
【校外講座】人工智慧運用於心臟血管疾病之最新發展
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
Diatom-assisted biomicroreactor targeting the complete removal of perfluorinated compounds
(2020-02-15)
Albert, Karunya
;
Hsieh, Pei-Ying
;
Chen, Tsai-Hsuan
;
Hou, Chia-Hung
;
Hsu, Hsin-Yun
Persistent perfluorinated compounds (PFCs) have been recognized as a global environmental issue. Developing methods without leading to additional burden in nature will be essential for PFCs removal. Herein, we functionalized iron nanoparticles on living diatom (Dt) to efficiently enable the Fenton reaction and reactive oxygen species (ROS) production. Iron nanoparticles at the surface of living diatom act as promising catalytic agents to trigger (OH)-H-center dot radical generation from H2O2. Dt plays dual roles: i) as solid support for effective adsorption, and ii) it supplies oxygen and inherently produces ROS under stress conditions, which improves removal efficiency of PFCs. We also demonstrated its reusability by simple magnetic separation and 85% of decomposition efficiency could still be achieved. This newly developed diatom-assisted bioremediation strategy enables green and efficient PFC decomposition and shall be readily applicable to other persistent pollutants.
陽明X桂冠產學合作，推出美味湯品與逆齡食譜
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
冷凍食品界的龍頭「桂冠實業」，自2018年加入「陽明大學國際產學聯盟」國際級會員後，便與陽明展開2000萬的高值化產學合作，成立...
Reliability analysis of composite wind turbine blades considering material degradation of blades
(2020-02-15)
Su, H. M.
;
Kam, T. Y.
;
交大名義發表
;
National Chiao Tung University
In this study, a set of analytical methods was proposed to evaluate the reliability of composite wind turbine blades after material aging, and to improve the blade structure strength to enhance its reliability. Because, the material aging will occur when the blade is affected by the external environment for a long time, consequently, time is an extremely important factor in reliability. Therefore, it is necessary to simulate the effect of environment on materials by aging experiments, so as to obtain the relationship between time, material strength and material constant. The reliability evaluation method used in this study is the direct integration method, which can quickly evaluate the reliability of blades degraded by materials. Because the reliability of the unmodified blade impossible be more than 98% after 20 years, it is necessary to improve the blade and then evaluate the reliability. The weight of the improved blade increased by only 8.57%, but the wind speed of buckling could be delayed by 32.47%, and the reliability could be more than 99% after 20 years, so the improved method meets the demand.
【實驗動物基本技術操作技能】3/12大鼠班
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
陽明GLORIA 2020首場企業講座：當新創遇見創投
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
陽明國際產學聯盟2020年首場「生醫領航方舟企業講座」，特別邀請到對於企業策略規劃、併購有豐富經驗的橡子園創投合夥人、永加利...
因應新型冠狀病毒疫情，陽明延至3/2開學
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
因應新型冠狀病毒（2019-nCoV，武漢肺炎）疫情，陽明配合教育部防疫政策，本學期開學日將延後至3月2日，相關課務、學務等配套措施...
【生醫領航方舟～企業講座】謝仁俊教授：禪與腦
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
「基因丶進化丶革命：生物藝術展」～藝文中心三月份展覽預告
(國立陽明大學, 2020-02-15)
陽明電子報編輯小組
今年三月，藝文中心將舉辦生物藝術展，由視覺文化所勞維俊老師擔任策展人，𨘋請多位國內外知名的年輕藝術家及團體，展出他們精選的生物藝術作品；透過這些作品，呈現並強調生命科學丶生醫工程丶科技丶哲學等各學科與藝術間互相拉鋸又融合的關係。
Experimental and theoretical analysis of loading characteristics of different electret media with various properties toward the design of ideal depth filtration for nanoparticles and fine particles
(2020-02-15)
Tien, Chi-Yu
;
Chen, Jiang-Ping
;
Li, Shihang
;
Li, Ziyi
;
Zheng, Yu-Ming
Loading experiments of four electret fibrous media having various properties, including fiber diameter, porosity, thickness, charging density and fibrous structure, with fine and nanosized particles were conducted for finding out the influencing factors on efficiency decline and particle holding capacity. The four media include a commercial HVAC media rated with the minimum efficiency reporting value of 13 (MERV13), and three home-made media, including a coarse fiber (CF) layer, a melt-blown (MB) layer, and a bead-on-string (BS) layer. A theoretical model for predicting the pressure drop growth along the loading was applied and compared with that of experiments. The experimental results revealed that the charges of electret media did enhance the holding capacity. The decline of efficiency was found to closely relate to the holding capacity of each media. Higher capacity resulted in a higher decline of efficiency. The theoretical calculation illustrated that the ideal holding capacity was significantly higher than the current electret media had achieved, which indicates that it leaves much improvement of media design more desirable. Comparing the theoretical and experimental results of pressure drop growth with respect to mass load, it was found the current electret layers performed different levels of ideal depth filtration, with an order of CF > MERV13 > BS > MB. Beyond the ideal filtration, pressure drop growth raised exponentially. By utilizing their individual ideal filtration stage, three composite media consisting of 3-4 layers of these electrets with a total thickness less than 1 mm were combined and tested. At 1 in-H2O of pressure drop, the composite electret CF + MERV13 + BS achieved the highest holding capacity with 14.1 g m(-2) which was at least 5-10 times higher than the existing commercial HEPA filters. The bead-onstring fibrous structure of BS enhanced the holding capacity of the composite media significantly. The newly developed electret-based composite filters performed an energy efficient filtration for fine and nanosized particles.
On the validity of the independent interaction model for generation of dynamic Stark-induced degenerate states in chiral aromatic ring molecules
(2020-02-16)
Mineo, Hirobumi
;
Kim, Gap-Sue
;
Lin, Sheng Hsien
;
Fujimura, Yuichi
;
應用化學系
Dynamic Stark-induced degenerate state (DSIDS) is essential to generate electronic coherent angular momentum to identify molecular chirality. We previously derived DSIDS for phenylalanine enantiomers in the independent interaction model (IIM), in which two linearly polarized nonresonant UV lasers independently interact with relevant two electronic excited states. We present a numerical method to derive DSIDS beyond IIM. Here, both lasers interact with both excited states, and laser input parameters are determined for DSIDS located at the center of the excited states. The numerical results reasonably agree with those calculated in the IIM, which elucidate the validity of DSIDS in the IIM.
Astigmatism correction and quality optimization of computer-generated holograms for holographic waveguide displays
(2020-02-17)
Lin, Wen-Kai
;
Matoba, Osamu
;
Lin, Bor-Shyh
;
Su, Wei-Chia
;
光電學院
In this manuscript, the astigmatism of the waveguide combiner with a pair of symmetry HOEs was analyzed. The light field can be predicted by the modified convolution formulation of Fresnel diffraction when the information of light passes through the astigmatism causing element. Then the astigmatism can be corrected. The theory was experimentally proved by the system with a phase-only SLM and a diffraction planar waveguide. Furthermore, the image quality of astigmatism corrected phase-type CGHs can be improved via the iteration process. Since the coherence of light source was employed, the temporal averaging method was utilized to avoid speckle noise. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement