Browsing by Issue Date, starting with "2012-03-05"

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Electron dephasing in homogeneous and inhomogeneous indium tin oxide thin films
(2012-03-05)
Wu, Chih-Yuan
;
Lin, Bo-Tsung
;
Zhang, Yu-Jie
;
Li, Zhi-Qing
;
Lin, Juhn-Jong
The electron dephasing processes in two-dimensional homogeneous and inhomogeneous indium tin oxide thin films have been investigated in a wide temperature range 0.3-90 K. We found that the small-energy-transfer electron-electron (e-e) scattering process dominated the dephasing from a few kelvins to several tens of kelvins. At higher temperatures, a crossover to the large-energy-transfer e-e scattering process was observed. Below about 1 to 2 K, the dephasing time tau(phi) revealed a very weak temperature dependence, which intriguingly scaled approximately with the inverse of the electron diffusion constant D, i.e., tau(phi)(T approximate to 0.3 K) proportional to 1/D. Theoretical implications of our results are discussed. The reason why the electron-phonon relaxation rate is negligibly weak in this low-carrier-concentration material is presented.
交大e-News第113期
(2012-03-05)
Secretariat
;
國立交通大學秘書室
Host Sensitization of Tb3+ Ions in Tribarium Lanthanide Borates Ba(3)Ln (BO3)(3) (Ln = Lu and Gd)
(2012-03-05)
Wang, De-Yin
;
Chen, Teng-Ming
;
Cheng, Bing-Ming
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應用化學系
;
Department of Applied Chemistry
The vacuum-ultraviolet (VUV) spectroscopic properties of undoped and Tb3+-doped borates Ba(3)Ln(BO3)(3) (Ln = Lu and Gd) with different crystal structures were investigated by using synchrotron radiation. Ba3Lu(BO3)(3) (BLB) crystallizes in a hexagonal structure, whereas Ba3Gd(BO3)(3) (BGB) crystallizes in a trigonal structure. The maximum host absorption for BLB and BGB was found to locate at similar to 179 and similar to 195 nm, respectively. Upon host excitation, BLB exhibits an intrinsic broad UV emission centered at 339 nm, which is attributed to the recombination of self-trapped excitons that may presumably be associated with band-gap excitations or molecular transitions within the BO33- group. In contrast to BLB, no broad emission but line emission ascribed to a Gd3+ P-6(J)-S-8(7/2) 712 transition was observed in the emission spectrum of BGB. Upon doping of Tb3+ ions into the hosts of BLB and BGB, an efficient energy transfer from the host excitations to Tb3+ via host/Gd3+ emission was observed, showing that host sensitization of Tb3+ occurs in these rare-earth borates.
Photoluminescence associated with basal stacking faults in c-plane ZnO epitaxial film grown by atomic layer deposition
(2012-03-05)
Yang, S.
;
Kuo, C. C.
;
Liu, W. -R.
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Lin, B. H.
;
Hsu, H. -C.
Basal plane stacking faults (BSFs) with density of similar to 1 x 10(6) cm(-1) are identified as the dominant defect in the annealed ZnO thin films grown on c-plane sapphire by atomic layer deposition. The dominant peak centered at 3.321 eV in low-temperature photoluminescence measurements is attributed to the emission from the BSFs. The emission mechanism is considered to be the confined indirect excitons in the region of quantum-well-like structure formed by the BSFs. The observed energy shift of 19 meV with respect to the BSF-bounded exciton at low temperature may be caused by the localization effect associated with the coupling between BSF quantum wells. (C) 2012 American Institute of Physics. [http://dx.doi. org/10.1063/1.3692730]
Non-alloyed Cr/Au Ohmic contacts to N-face and Ga-face n-GaN
(2012-03-05)
Yan, Liang-Jyi
;
Kuo, Cheng Huang
;
Sheu, Jinn-Kong
;
Lee, Ming-Lun
;
Tseng, Wei-Chun
Non-alloyed Cr/Au Ohmic contacts on N-face and Ga-face n-GaN were studied. The specific contact resistances (rho(c)) of Cr/Au contacts onto the N-face and Ga-face n-GaN were as low as 2.4 x 10 (4) Omega cm(2) and 2.4 x 10(-5) Omega cm(2), respectively. Native oxide formed on the n-GaN surface was believed to be the key factor for higher rho(c). The results of X-ray photoelectron spectroscopy confirmed that n-GaN samples with different surface polarities or treated by different chemical solutions exhibited significant differences in gallium oxide content on the surface, which led to a marked difference in the rho(c) of non-alloyed Cr/Au Ohmic contacts to GaN films. (C) 2011 Elsevier B.V. All rights reserved.
我願意為你解讀《我願意為妳朗讀》：從「嘔吐」到「清洗」
(2012-03-07)
謝志偉
;
開放教育推動中心
;
Open Education Office
課程首頁本課程是由交通大學新文藝復興閱讀計畫提供。 96 年 8 月當各大學紛紛摩拳擦掌準備迎接新生的同時，交通大學校長吳重雨則因為一則來自於七月份泰晤士報，有關於英國首相布朗公布其夏日讀書清單的新聞中，看到了他對知識的尊重。在這同時，吳重雨校長也思考著，要如何為學生準備追求知識的環境和激發他們對知識的尊重與喜愛。台積電張忠謀董事長曾陳述他 18 歲進入哈佛那一年，博覽文史哲理工經典群籍，至此奠定了他求知的基礎，並借海明威名言，將其改為「哈佛這一年為人生可帶走的盛宴。」吳重雨校長以張董事長的學習為借鏡，認為學生固然能藉由自我閱讀的方式學習到豐沛的知識，但透過名人、大師親臨現場地介紹經典書籍，更能加深學子們對於書籍的認識與興趣，這也是「新文藝復興閱讀計劃」 ( 以下簡稱 : 「經典名著選讀」 ) 活動展開籌劃的緣由。於是，吳重雨校長便積極敦請「交大通識教育委員會」，接手籌備本計劃的相關活動，而該中心也成為實際施行本計畫的策動、開課以及認證單位。至此，期許交大學子藉由閱讀、聽講來提昇人文素養、開拓視野的「新文藝復興閱讀計劃」，就此展開。
INJECTABLE SMART GEL AND METHOD FOR FABRICATING THE SAME
(2012-03-08)
LIU Dean-Mo
;
Hsiao Meng-Hsuan
;
Lin Li Jie
An injectable smart gel and a method for fabricating the same are disclosed. A basic structural stabilizer/polymeric electrolyte and a diluting solution are added to a modified chitosan to regulate the chitosan solution to have a pH value closing to that of the human body and form a flowable chitosan sol. The flowable chitosan sols formed thereby are respectively converted into inflowable chitosan gels via increasing the temperature thereof to the human body temperature, and via adding calcium ion or regulating the chitosan sol into an acidic solution. The injectable smart gel fabricated thereby is injectable and able to function as a carrier of magnetism-sensitive medicine-containing nanocapsules. The medicine can be released to the injectable smart gel with an external non-contact force, such as a magnetic field, an electric field or an ultrasonic wave, for long-acting and multi-stage medicine delivery. The present invention is very useful in biomedical engineering.
Method for designing wiring topology for electromigration avoidance and fabrication method of integrate circuits including said method
(2012-03-08)
Hui-Ru Jiang
;
Hua-Yu Chang
;
Chang Chih-Long
A method for designing wiring topology for electromigration avoidance, which is composed of multiple sources, multiple sinks and multiple wires, is disclosed. The steps of said method to get an optimal topology includes: 1. calculating the length of all the wires to choose one of the wires with the shortest length as a feasible wire, 2. deciding a capacity of the feasible wire, 3. deciding the capacities of the other wire according to the capacity of the feasible wire, a flow of the source of the feasible wire and a flow of the sink of the feasible wire, 4. comparing the length of the other wires to select another feasible wire, 5. repeating said steps until finding all feasible wires for constructing a feasible topology, 6. creating a flow network according to the feasible topology, 7. iteratively checking if a negative cycle exists in the flow network and removing it until no more negative cycles.
ASYMMETRIC VIRTUAL-GROUND SINGLE-ENDED SRAM AND SYSTEM THEREOF
(2012-03-08)
JOU Shyh-Jye
;
Lin Jhih-Yu
;
Chuang Ching-Te
;
Tu Ming-Hsien
;
Tsai Ming-Chien
The present invention discloses an asymmetric virtual-ground single-ended SRAM and a system thereof, wherein a first inverter is coupled to a high potential and a virtual ground, and wherein the first inverter and a second inverter form a latch loop, and wherein a third inverter is electrically connected with the second inverter, and wherein the third inverter and the second inverter are jointly coupled to the high potential and a ground. A write word line and a read word line control an access transistor and a pass transistor to undertake writing and reading of signals. A plurality of asymmetric virtual-ground single-ended SRAMs forms a memory system.
Enhancement of photovoltaic properties in supramolecular polymer networks featuring a solar cell main-chain polymer H-bonded with conjugated cross-linkers
(2012-03-09)
Patra, Dhananjaya
;
Ramesh, Mohan
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Sahu, Duryodhan
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Padhy, Harihara
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Chu, Chih-Wei
Stille polymerization was employed to synthesize a low-band-gap (LOG) conjugated main-chain polymer PBTH consisting of bithiazole, dithieno[3,2-b:2',3'-d]pyrroles (DTP), and pendent melamine derivatives. Novel supramolecular polymer networks PBTH/C and PBTH/F were developed by mixing proper molar amounts of polymer PBTH (containing melamine pendants) to be hydrogen-bonded (H-bonded) with complementary uracil-based conjugated cross-linkers C and F (i.e., containing two symmetrical uracil moieties connected with carbazole and fluorene units through triple bonds). The formation of multiple H-bonds between polymer PBTH and cross-linkers C or F was confirmed by FT-IR measurements. In contrast to polymer PBTH, the supramolecular design with multiple H-bonds can enhance the photovoltaic properties of polymer solar cell (PSC) devices containing H-bonded polymer networks PBTH/C and PBTH/F by tuning their light harvesting capabilities, HOMO energy levels, and crystallinities. Initially, the power conversion efficiency (PCE) values of PSC devices containing supramolecular polymer networks PBTH/C and PBTH/F as electron donors and [6,6]-phenyl-C-71-butyric acid methyl ester (PC70BM) as an electron acceptor (polymer:PC70BM = 1:1 w/w) are found to be 0.97 and 0.68%, respectively, in contrast to 0.52% for polymer PBTH. The highest PCE value of 1.56% with a short-circuit current densities (J(sc)) value of 7.16 mA/cm(2), a open circuit voltages (V-oc) value of 0.60 V. and a fill factor (FF) of 0.36 was further optimized in the PSC device containing a supramolecular polymer network PBTH/C as polymer:PC70BM = 1:2 w/w. These results indicate that supramolecular design is an effective route towards better photovoltaic properties of V-oc, J(sc), and PCE values in polymer solar cells. (C) 2012 Elsevier Ltd. All rights reserved.
心經新風貌　增色或走調？
(2012-03-11)
曾意倫
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Department of Communication and Technology
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傳播與科技學系
宗教音樂存在已久，以不同的形式唱出樂曲中的涵義，各式各樣的宗教音樂也呈現出不一樣的風貌。直至今日有許多宗教音樂經過改編或創造，在加入新元素後，增添了不一樣的風采，突破以往宗教音樂的既定印象。
何時洗去心中繁華
(2012-03-11)
韓捷
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Department of Communication and Technology
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傳播與科技學系
每當遇到一些不如意的事情之後，信基督教的媽媽總是會對我說：「要不要去教會阿，可以讓你改變很多喔。」不過我總是說不要，並不是我不喜歡基督教，而是我現在還不想有宗教信仰。
我的老朋友花園城市
(2012-03-11)
林彥伶
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Department of Communication and Technology
;
傳播與科技學系
「中興新村要被拆掉了！」高中三年級的最後一個學期，這個流言在校園間引起同學們議論紛紛，也讓許多人半信半疑。從我小時候到讀高中，在我眼裡中興新村一直以來並無太大的改變，怎麼可能會被拆掉甚至消失呢？
電音歌仔戲　奔騰的白馬
(2012-03-11)
陳燕珩
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Department of Communication and Technology
;
傳播與科技學系
在西方流行音樂為主流的現代，不少人嘗試在音樂中加入東方風味，然而在各種中西合璧的元素中，卻始終不見代表台灣的音樂文化。蘇通達在《我身騎白馬》中，將歌仔戲融合電子樂，呈現穿越傳統與後現代間的經典之作。
食記　我的小鄉里
(2012-03-11)
張繼云
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Department of Communication and Technology
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傳播與科技學系
小鄉里不繁華，也許不能應有盡有，但它溫暖又溫柔，尤其在食物供應上，絕對不缺。
日常中的小確幸　廚房
(2012-03-11)
蘇冠心
;
Department of Communication and Technology
;
傳播與科技學系
我突然明白，這些日常且規律的行為並不會因為誰的離開而改變，正因為這些小事被用心對待，這個家庭才得以被守護。那些記憶中的日常小事，就像是廚房一樣那樣看似無謂，卻是必須的存在。
繞著我們的一片藍
(2012-03-11)
陳思佑
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Department of Communication and Technology
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傳播與科技學系
我們最常接觸到的海，可能是觀光勝地如詩如畫的風景，可能是電視節目上驚險刺激的畫面，也有可能是瘋狂搖滾的音樂盛事，但其中卻缺少了最真實、最普遍的那面。
藝術背後的人文之美　
(2012-03-11)
楊佳靜
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Department of Communication and Technology
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傳播與科技學系
林志銘的《公共藝術‧故事漫遊》，以親身探索、記錄的方式漫遊台灣，告訴大家那些公共藝術背後往往藏著更深刻的意涵及情感故事。
淺談　韓流在台灣
(2012-03-11)
朱筱微
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Department of Communication and Technology
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傳播與科技學系
韓流，是為「韓國流行文化」的簡稱，台灣從2001年開始盛行瘋韓熱，被視為韓流發源地。韓流無時無刻、無所不在，除了或聽或看的流行娛樂文化外，連高科技產業也偷偷滲入你我生活中。
非同步處理系統
(2012-03-11)
鄭緯民
;
陳昌居
一種非同步處理系統，是基於交握協定來執行信號傳輸，且適用於將虛擬記憶體位址轉換為實體記憶體位址，並包含一非同步處理器及一記憶體。該非同步處理系統包括複數個具有記錄項的轉換搜尋緩衝器，因此能減少耗電，此外也包含一預取緩衝器，因此能以預取機制支援轉換搜尋緩衝器，而達到即使在多行程環境下，也能提昇位址轉換的效能。且因為此非同步處理系統的前後元件之間是藉由交握協定溝通，因而可使位址轉換的可靠性和效能增加。