Browsing by Issue Date, starting with "2019-11-28"

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A comprehensive framework of TDR landslide monitoring and early warning substantiated by field examples
(2019-11-28)
Chung, Chih-Chung
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Lin, Chih-Ping
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土木工程學系
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Department of Civil Engineering
Due to the climate change and hazardous geological environment in Taiwan, real-time landslide monitoring for safety of adjacent tribes or infrastructures is much conspicuous. Time domain reflectometry (TDR) is considered as valuable technology for continuously capturing dynamics and locations of shear deformations with high temporal and spatial coverages. In this study, a comprehensive framework was proposed by integrating up-to-date procedure of installation guide, data acquisition, sliding deformation identification, and early warning processing. The advantages of the proposed framework were then examined and substantiated via field cases. The first case is at a large colluvium slope in Lushan, central Taiwan. The colluvium is still active after heavy rainfall events, but limited evidence of sliding characteristic was collected previously by manual inclinometer logging. Therefore, the TDR framework was deployed and multiple landslide surfaces at great depths were timely observed. Movement of colluvium mass was thereby interpreted as a buckling fold. Additionally, creep occurred among the colluvium layer during the monsoon season because of strength weakening influenced by pore pressure fluctuations. Monitoring results of the second landslide case in Jufan, northern Taiwan, reported the dynamics of a thin sliding plane captured with TDR high temporal resolution. This unique behavior was further applied for devising of a novel early-warning strategy in terms of time-variation of TDR response, validating that the comprehensive framework of TDR landslide can effectively contribute to early warning.
Screw-Dislocation-Driven Growth Mode in Two Dimensional GaSe on GaAs(001) Substrates Grown by Molecular Beam Epitaxy
(2019-11-28)
Nhu Quynh Diep
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Liu, Cheng-Wei
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Wu, Ssu-Kuan
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Chou, Wu-Ching
;
Sa Hoang Huynh
Regardless of the dissimilarity in the crystal symmetry, the two-dimensional GaSe materials grown on GaAs(001) substrates by molecular beam epitaxy reveal a screw-dislocation-driven growth mechanism. The spiral-pyramidal structure of GaSe multi-layers was typically observed with the majority in epsilon-phase. Comprehensive investigations on temperature-dependent photoluminescence, Raman scattering, and X-ray diffraction indicated that the structure has been suffered an amount of strain, resulted from the screw-dislocation-driven growth mechanism as well as the stacking disorders between monolayer at the boundaries of the GaSe nanoflakes. In addition, Raman spectra under various wavelength laser excitations explored that the common epsilon-phase of 2D GaSe grown directly on GaAs can be transformed into the beta-phase by introducing a Se-pretreatment period at the initial growth process. This work provides an understanding of molecular beam epitaxy growth of 2D materials on three-dimensional substrates and paves the way to realize future electronic and optoelectronic heterogeneous integrated technology as well as second harmonic generation applications.
【DAAD德國留學暨獎學金說明會】
(國立陽明大學, 2019-11-29)
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全新落成，醫學院國際交流中心正式揭幕
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陽明近年積極致力於國際化，第一座專為國際生打造的全新空間──「醫學院國際交流中心」，11月25日正式揭幕，將提供更舒適現代的...
【校務研究專題演講】
(國立陽明大學, 2019-11-29)
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【12月生技咖啡館】老頑童的創業之旅
(國立陽明大學, 2019-11-29)
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【職場軟實力系列講座】醫藥生技產業趨勢&職務解析
(國立陽明大學, 2019-11-29)
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截長補短～面對與跨越學習障礙
(國立陽明大學, 2019-11-29)
劉容孜
;
陽明電子報編輯小組
【職場軟實力系列講座】109年度高普考考試講座
(國立陽明大學, 2019-11-29)
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走吧～來去交大草地音樂祭
(國立陽明大學, 2019-11-29)
陳貞吟
;
連聖豪
;
蔣卉綺
;
顏良毅
;
陽明電子報編輯小組
交大邀請陽明同學參加一年一度的【清交草地音樂祭】活動
【探索大腦的奧秘系列工作坊Ⅴ】找回記憶中的你
(國立陽明大學, 2019-11-29)
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台聯大高手齊聚陽明，師生盃桌球賽熱鬧開打
(國立陽明大學, 2019-11-29)
陽明電子報編輯小組
睽違三年，台灣聯合大學系統「師生盃桌球友誼賽」，今年再度輪由陽明主辦。四校共16支球隊，11月16日齊聚陽明活動中心二樓綜合球...
【台聯大溫世仁卓越學術講座】2016年諾貝爾化學獎得主演講
(國立陽明大學, 2019-11-29)
陽明電子報編輯小組
青春、活力、歡笑，第45屆校運美好封存
(國立陽明大學, 2019-11-29)
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今年校運會可說是有史以來最冷的一次，強勁的東北季風不斷迎面襲來，綿綿細雨也幾乎整日不停。儘管風雨交加，海拔165公尺高的山頂...
【剪一顆詩宇宙】古國萱創作分享與剪紙工作坊
(國立陽明大學, 2019-11-29)
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永不放棄，食安所鄭程日同學獲頒「抗癌鬥士」
(國立陽明大學, 2019-11-29)
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從罹癌到雙腿髖骨頭壞死，走過三年多辛苦抗癌路，目前就讀於「食品安全及健康風險評估研究所」碩二的鄭程日同學，不但積極樂觀抗...
溫馨休憩空間，守仁樓教師休息室正式啟用
(國立陽明大學, 2019-11-29)
陽明電子報編輯小組
陽明的老師們，現在又多了一個休憩、交誼的空間喔！醫學院特地在守仁樓開闢了一個教師休息室──Medicine Faculty Lounge，11月14...
Chemical vapor deposition growth of bilayer graphene via altering gas flux geometry
(2019-11-30)
Petrov, Stefan
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Rafailov, Peter M.
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Marinova, Vera
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Lin, Shiuan-Huei
;
Lai, Yi-Chun
Graphene films with high content of bilayer graphene are obtained by chemical vapor deposition technique on copper (Cu) foil by means of suitably designing the flux geometries of the reactant gases. First single-layer graphene growth is optimized using a preliminary oxygen passivation of the Cu substrate which facilitates the formation of larger graphene grains with low defect density. Then, in order to enhance the transport of reactant species to the catalyst substrate, the gas flux geometry is modified in two ways: (i) fixing a graphite holder next to the Cu substrate perpendicular to the stream of the flux gases or (ii) positioning the Cu foil into a graphite shelter. It is found that both modifications facilitate the growth of a second graphene layer leading to increased formation of bilayer graphene. The obtained graphene layers are characterized by Raman spectroscopy (with special focus on the overtone (2D) of the disorder-induced band), scanning electron microscopy, transmission electron microscopy, atomic force microscope analysis and optical transmission measurements. Narrow symmetric 2D Raman peaks with linewidths ranging down to 22 cm(-1) but blue-shifted with respect to that of single-layer graphene are obtained from graphite holder- and shelter-grown samples indicating high-quality bilayer graphene.
Highly efficient flexible organic light-emitting diodes based on a high-temperature durable mica substrate
(2019-12-01)
Lai, Yi-Ning
;
Chang, Chih-Hao
;
Wang, Pei-Chun
;
Chu, Ying-Hao
;
交大名義發表
Muscovite mica is expected to show great potential in flexible optoelectronics due to its superb temperature tolerance, high transmittance, chemical stability, and mechanical durability. This flexible substrate produces sputtered transparent conducing electrodes (TCEs) with excellent film quality with high transmittance and conductivity. In this study, a designed composite TCE consisting of aluminum-doped zinc oxide (AZO) and indium fin oxide (ITO) is proposed to simultaneously maximize flexibility and conductivity. Blue-, green-, and red-emitting flexible organic light-emitting diodes (FOLEDs) using composite TCEs on mica exhibited satisfactory performance with maximum respective electroluminescence efficiencies of 18.1% (38.7 cd/A), 18.7% (66.2 cd/A), and 13.3% (22.2 cd/A). Furthermore, the green-emitting FOLEDs were modified to construct tandem FOLEDs, giving a higher peak efficiency of 27.9% (93.3 cd/A) and saturated green emission. These results can serve as a useful reference for future work on composite TCEs on mica for FOLEDs in display and lighting applications.
劉大鴻的創作
(深河出版有限公司, 2019-12-01)
郭秀鈴