Browsing by Issue Date, starting with "2019-03-16"

Now showing 1 - 20 of 7995

以微溝槽結構來控制霜成核的位置之用途與其方法
(2019-03-16)
呂明璋
;
羅景文
本發明實施例提供一種用以控制霜成核的微溝槽結構，其包括基板。基板具有非粗糙的表面，其中表面具有沿著第一方向延伸的一個或多個微溝槽。所述用以控制霜成核的微溝槽結構具有良好的抗冰與去冰效果。
光學應力感測元件、系統及方法
(2019-03-16)
盧贊文
;
吳家政
;
李柏璁
本發明提供一種光學應力感測元件，乃將至少兩個光學應力感測單元包覆於一包覆體內而可受應力作用來產生形變，其中，每個光學應力感測單元是由多個奈米柱體沿著單一排列方向所構成，這些光學應力感測單元於平面上是以相對於一座標軸夾不同角度來排列，且其兩兩相鄰的夾角為銳角。當光學應力感測元件在平面上受到一未知應力，可透過各光學應力感測單元之光學共振波長變化與資料庫比對後，而感知應力之方向、種類與大小。此外，本發明還提出一種基於該光學應力感測元件之感測系統及感測方法。
可防止採樣誤差的高效率靜電微粒液相採樣器
(2019-03-16)
蔡春進
;
徐兆廷
本發明揭示一種高效率靜電微粒液相採樣器，該採樣器採用乾式收集、濕式萃取的採樣方式以避免採樣誤差。乾式收集分為兩階收集微粒，第一階以碳纖維束進行電暈放電，讓氣膠微粒帶電，第二階利用高電壓圓桿-接地圓柱間的電場，使帶電微粒以靜電力收著於接地的圓柱壁面；濕式萃取時，利用間歇性開啟與關閉的電磁閥，將去離子水以脈衝方式注入採樣器沖洗圓柱壁面上收集的氣膠成為液體樣本，並進行後續氣膠液體樣本的手動或自動的化學分析。
Personalized Wearable Guides or Audio Guides: An Evaluation of Personalized Museum Guides for Improving Learning Achievement and Cognitive Load
(2019-03-16)
Sun, Jerry Chih-Yuan
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Yu, Shih-Jou
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教育研究所
;
Institute of Education
This study aimed to investigate the effects of incorporating personalized learning based on students' learning styles (visual or verbal) into wearable or audio museum guides. Personalized learning is achieved by matching participants' learning styles with either a wearable or an audio guide. The participants in this study consisted of 79 university students divided into four groups: audio guide-visual, audio guide-verbal, wearable guide-visual, and wearable guide-verbal. The students' cognitive load (intrinsic, extraneous, and germane) and learning achievement (remembering, understanding, and analyzing) were assessed and compared. In this study, it was found that personalized learning helps to reduce students' intrinsic cognitive load and extraneous cognitive load, while increasing their germane cognitive load and improving their ability to memorize. It is suggested that museum educators refer to our classification of learning styles, provide visitors with personalized devices, and incorporate wearable guide devices into their museums' learning processes, in order to improve visitors' learning achievement.
覆晶式發光二極體元件及其製造方法
(2019-03-16)
洪瑞華
;
陳亘延
;
簡桓郁
一種覆晶式發光二極體元件，其包括透明保護基板、透明導體層、膠黏層、III-V族堆疊層、第一導電性金屬電極、第二導電性金屬電極與絕緣層。透明導體層形成於透明保護基板之上。膠黏層用於膠黏透明保護基板與透明導體層。III-V族堆疊層形成於透明導體層的第一部分之上。第一導電性金屬電極形成於透明導體層的第二部分之上。第二導電性金屬電極形成於III-V族堆疊層的部分之上。絕緣層覆蓋透明導體層的暴露部分、III-V族堆疊層的暴露部分，且絕緣層還覆蓋第一導電性金屬電極的一部份與第二導電性金屬電極的一部份，以暴露出第一與第二導電性金屬電極。
Differences between EFL Beginners and Intermediate Level Readers When Reading Onscreen Narrative Text with Pictures: A Study of Eye Movements as a Guide to Personalization
(2019-03-16)
Lin, Sunny S. J.
;
Hsieh, Ming-Yi
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教育研究所
;
Institute of Education
Compared to reading text alone, pictures are regarded as easier for readers to comprehend the context. For EFL readers, their reading behavior on text with pictures needs to be carefully inspected. The study aims to examine how different are the viewing behaviors of EFL beginners versus intermediate readers on reading narrative paragraphs and accompanying pictures. Seventeen junior high and twenty-one senior high students represented as EFL beginners and intermediate readers, respectively. Both of them read consecutively three screens with narrative texts and pictures illustrating the texts. The results showed that both beginners and intermediate readers paid more attention to the texts than the pictures. The beginners almost solely fixated on the texts and few fixations fell on to the pictures while the intermediates had more fixations on both texts and pictures. The eye-movement data in the specific AOIs showed that the intermediates made more references between text and pictures when they encountered difficult words or processed semantic meaning making. The beginners were less efficient in reading, having less fixated time on each screen, and encountered greater difficulties in comprehension than the intermediates. Based on eye-movement data, a personalized strategy to alter display sequence could be provided to support EFL beginners: Before going into narrative reading, a reminding message could be dispatched onscreen guiding them to view standalone pictures and to inspect pictorial components carefully to serve as the macro-reading strategy. The personalization could also be realized by posting cognitive and meta-cognitive level questions during the inspection of picture.
防止微粒負載效應、具有濕潤衝擊表面的慣性衝擊器
(2019-03-16)
蔡春進
;
黎氏菊
;
宋榮哲
本發明揭示一種具有濕潤衝擊表面的慣性衝擊器，可防止微粒負載效應。結構由上殼體、衝擊部及下殼體組成。上殼體具有氣體入口及與其連接之圓形噴嘴。衝擊部具有衝擊井，衝擊井下部為衝擊表面。噴嘴正對於衝擊表面的中心上方設置。衝擊表面中心具有液體輸入口，透過連續性或間歇性導入液體形成濕潤衝擊表面並去除微粒堆積，同時液體由衝擊表面上的液體排出路徑排出，下殼體具有氣體出口通道可連接至微粒採樣或監測裝置。
具有混合式反射鏡結構的垂直共振腔面射型雷射
(2019-03-16)
盧廷昌
;
張祖齊
;
郭修邑
一種具有混合式反射鏡結構的垂直共振腔面射型雷射，乃將介電質反射鏡與金屬反射鏡結合形成混合式反射鏡，藉由金屬本身高反射率與高導熱效果，大幅降低介電質反射鏡的使用對數，進而減少散熱途徑，增加散熱效果，同時，於金屬與介電質之間形成雙折射率的週期性光柵結構，可以增加雷射極化的穩定度，此外，週期性光柵結構可增加黏著金屬之接觸面積，因此其晶圓強度與穩定度可大幅提升。
Zero-phonon lines in the spectra of dysprosium atoms in superfluid helium
(2019-03-18)
Moroshkin, P.
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Konol, K.
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國際半導體學院
;
International College of Semiconductor Technology
We present an experimental study of a zero-phonon line (ZPL) in the absorption spectrum of Dy atoms solvated in superfluid He. The dopants reside in nanometer-sized spherical cavities known as atomic bubbles. We observe a temperature-dependent broadening of ZPL in the absorption spectrum. The effect is attributed to the scattering of thermal phonons on the atomic bubble that leads to the dephasing of the Dy transition dipole. The extrapolated ZPL intrinsic spectral width at zero temperature is 2300 times larger than the natural linewidth in a free atom. This can be assigned to a fast radiationless quenching of the upper state of the studied transition.
Motion Estimation by Hybrid Optical Flow Technology for UAV Landing in an Unvisited Area
(2019-03-20)
Cheng, Hsiu-Wen
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Chen, Tsung-Lin
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Tien, Chung-Hao
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機械工程學系
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光電工程學系
The capability of landing on previously unvisited areas is a fundamental challenge for an unmanned aerial vehicle (UAV). In this paper, we developed a vision-based motion estimation as an aid to improve landing performance. As an alternative to the common scenarios accompanying by external infrastructures or well-defined marker, the proposed hybrid framework can successfully land on a new area without any prior information about guiding marks. The implementation was based on the optical flow technique associated with a multi-scale strategy to overcome the decreasing field-of-view during the UAV descending. Compared with a commercial Global Positioning System (GPS) through a sequence of flight trials, the vision-aided scheme can effectively minimize the possible sensing error, thus, leading to a more accurate result. Moreover, this work has potential to integrate the fast-growing image learning process and yields more practical versatility for UAV applications in the future.
Effect of oblique retroreflection from a vibrating mirror on laser Doppler shift
(2019-03-20)
Agusanto, Kusuma
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Lau, Gih-Keong
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Liu, Ting
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Zhu, Chuangui
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機械工程學系
A laser Doppler vibrometer (LDV) fails to measure a large out-of-plane vibration of a rotating mirror when the mirror obliquely reflects the laser beam away, causing a signal loss from being detected. To solve this problem, an external retroreflective tape was used to recover the oblique reflection. However, the reading of LDV obtained from the recovered signal is not right because the retroreflection adds extra Doppler frequency shifts to the oblique reflection. Here, we first derive the relationship of Doppler shift to the oblique angle of retroreflection. For the first time with the help of retroreflection, a standard LDV can measure the largely vibrating mirror as well as a high-speed camera, albeit without the need for heavy computation. (C) 2019 Optical Society of America
Finding Visible kNN Objects in the Presence of Obstacles within the User's View Field dagger
(2019-03-20)
Su, I-Fang
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Chen, Ding-Li
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Lee, Chiang
;
Chung, Yu-Chi
;
交大名義發表
In many spatial applications, users are only interested in data objects that are visible to them. Hence, finding visible data objects is an important operation in these real-world spatial applications. This study addressed a new type of spatial query, the View field-aware Visible k Nearest Neighbor (V2-kNN) query. Given the location of a user and his/her view field, a V2-kNN query finds data object p so that p is the nearest neighbor of and visible to the user, where visible means the data object is (1) not hidden by obstacles and (2) inside the view field of the user. Previous works on visible NN queries considered only one of these two factors, but not both. To the best of our knowledge, this work is the first to consider both the effect of obstacles and the restriction of the view field in finding the solutions. To support efficient processing of V2-kNN queries, a grid structure is used to index data objects and obstacles. Pruning heuristics are also designed so that only data objects and obstacles relevant to the final query result are accessed. A comprehensive experimental evaluation using both real and synthetic datasets is performed to verify the effectiveness of the proposed algorithms.
交大e-News第274期-校長講座：林武郎教授談台灣、中國與美國的經貿關係
(2019-03-20)
國立交通大學秘書室
;
Secretariat
Metal substituted pyrochlore phase LixLa2-xCe1.8Ru0.2O7- (x=0.0-0.6) as an effective catalyst for oxidative and auto-thermal steam reforming of ethanol
(2019-03-21)
Hsieh, Ho-Chen
;
Chang, Yuan-Chia
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Tsai, Ping-Wen
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Lin, Yen-Yu
;
Chuang, Yu-Chun
Pyrochlore phase LixLa2-xCe1.8Ru0.2O7- (x = 0.0-0.6) [LLCRO] substituted by Li and Ru in A and B sites was synthesized and studied for performance in oxidative steam and auto-thermal reforming of ethanol (OSRE, ATR). The samples were characterized by powder X-ray diffraction (PXRD), X-ray absorption spectroscopy (XAS), and X-ray photoelectron spectroscopy (XPS) to examine the effect of substituted Li+ and Run+ on OSRE performance. The results indicated that the substituted Li ions modified the oxidation states of Ru and Ce in LLCRO, which led to oxygen vacancies/mobility and played an important role in the catalytic performance of OSRE. Using LLCRO as the catalyst and supported by Al2O3, La2Zr2O7 (LZO) was investigated for its hydrogen production performance. The catalytic stability of the LLCRO (x = 0.6)/LZO catalysts was tested at 350 degrees C under oxidative steam conditions (OSRE) and showed a stable ethanol conversion and hydrogen production (X-EtOH = 98(3)%; S-H2 = 95(3)%). Under autothermal conditions (ATR), the LLCRO (x = 0.6) catalyst supported by LZO exhibited a stable catalytic performance with an average ethanol conversion and hydrogen selectivity of 90(3)% and 71(4)%, respectively. Carbon deposition was significantly suppressed during the OSRE and ATR processes on LLCRO (x = 0.6) catalysts supported by LZO, whereas, a significant carbon deposition was observed for LLCRO (x = 0.6)/Al2O3 as the catalyst. These results indicate that LLCRO (x = 0.6) supported by LZO is an effective catalyst for hydrogen production. The enhanced activity was attributed to the effectively suppressed carbon deposition and the sintering of highly dispersed Ru ions in the LLCRO catalyst, which may be due to the strong binding between the catalyst and LZO.
One-pot synthesis of 4-arylidene imidazolin-5-ones by reaction of amino acid esters with isocyanates and alpha-bromoketones
(2019-03-21)
Haung, Jia-Yun
;
Barve, Indrajeet J.
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Sun, Chung-Ming
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應用化學系
;
Department of Applied Chemistry
A simple and new multicomponent reaction for the one-pot synthesis of substituted 4-arylidene imidazolin- 5-ones from L-amino acid methyl esters, iso-, isothio-or isoselenocyanates, and alpha-bromoketones is demonstrated. Isolation of thiohydantoin and 5-benzylidene 2-thioxoimidazolidin-4-one intermediates revealed a possible reaction mechanism. The strategy was further extended to the synthesis of 2-iminothiazolines and 2-thioxoimidazolin-4-ones.
總編輯的話
(2019-03-24)
李庭安
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Department of Communication and Technology
;
傳播與科技學系
本期為喀報308期，總共3篇文章。本期頭題為呂奕廷的《遊戲藝術論戰？文化美學新世代》，文章討論分析精闢，並閱讀起來十分有趣，獲得一致肯定。另外總編輯的話藏著藏頭尾詩，還請笑閱。
你今天「敗」了嗎
(2019-03-24)
殷顗霖
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Department of Communication and Technology
;
傳播與科技學系
【網路時代「購」不夠？了解知識一起GO！】專題

介紹21世紀的網購風潮，相對傳統購物的優勢，以及對我們造成的影響。
總編輯的話
(2019-03-24)
李庭安
;
Department of Communication and Technology
;
傳播與科技學系
本期為喀報308期，總共3篇文章。本期頭題為呂奕廷的《遊戲藝術論戰？文化美學新世代》，文章討論分析精闢，並閱讀起來十分有趣，獲得一致肯定。另外總編輯的話藏著藏頭尾詩，還請笑閱。
循環經濟小百科
(2019-03-24)
梁書瑜
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Department of Communication and Technology
;
傳播與科技學系
【垃圾消失了？循環經濟大解密】專題

你聽過產業共生嗎？你知道甚麼是生物循環嗎？在這個快速製造、大量消費的時代，有一股綠色力量正悄悄崛起，本篇將帶您以圖表的方式了解這既環保又創新的商業模式——「循環經濟」。
遊戲藝術論戰？文化美學新世代
(2019-03-24)
呂奕廷
;
Department of Communication and Technology
;
傳播與科技學系
【第九藝術的綻放：獨立遊戲】專題

近年來隨著獨立遊戲的漸盛，我們不再只看到迎合大眾口味的電玩遊戲獨霸市場；而是有越來越多充滿人性創意、自我表達的獨立遊戲浮上檯面。在這個時代，我們可以重新審視遊戲的藝術性，並了解從藝術的觀點而言遊戲的地位何在。