Browsing by Issue Date, starting with "2012-06-07"

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METHOD OF FORMING SINGLE-LAYER PHOTONIC CRYSTAL STRUCTURE
(2012-06-07)
Wu Pu-Wei
;
Huang Yi-Jui
A method of forming a single-layer photonic crystal structure. The method includes depositing electrophoretic suspension, working electrode and lower electrode in a container, wherein the working electrode and the lower electrode are formed at upper and lower parts of the container, respectively, and spaced apart at an distance; and applying an electric voltage to the working electrode and the lower electrode to form an electric field, such that particles in the electrophoretic suspension form a single-layer photonic crystal structure on the working electrode under interactive actions of the electric field and a gravity field by an electrophoresis self-assembly technique. Therefore, the single-layer photonic crystal structure has a low cost, and good quality and recurring property.
LIQUID CRYSTAL LENS STRUCTURE AND METHOD OF DRIVING SAME
(2012-06-07)
LIN YI-HSIN
;
LIN HUNG-CHUN
A liquid crystal (LC) lens structure and a method of driving same are disclosed. The LC lens structure includes an upper substrate, a lower substrate, a liquid crystal and polymer composite film, and an LC layer. The upper substrate is provided with a first conducive layer and a first alignment layer; and the lower substrate is provided with a second conductive layer and a second alignment layer. The liquid crystal and polymer composite film is arranged at one side of the first alignment layer to form a first lens, and the LC layer is arranged between the liquid crystal and polymer composite film and the second alignment layer to form a second lens. By building the liquid crystal and polymer composite film in the LC lens structure, it is able to realize an LC lens with low operating voltage and large focusing range.
PHOTONIC CRYSTAL AND METHOD OF FABRICATING THE SAME
(2012-06-07)
Wu Pu-Wei
;
Huang Yi-Jui
;
Lai Chun-Han
A three-dimensional geometric photonic crystal and a method of fabricating the photonic crystal are disclosed. The photonic crystal includes a geometric structure having a plurality of electrophoretic self-assembled particles and the plurality of particles are periodically arranged at any cross sections of the geometric structure. The method includes preparing an electrophoresis deposition suspension, installing first and second electrodes in the electrophoresis deposition suspension with the first electrode being encircled by the second electrode, and applying a voltage to the first electrode and the second electrode to form an electric field between the first and second electrodes, such that particles in the electrophoresis deposition suspension are electrophoretic self-assembled, and a periodically arranged geometric structure is formed. A photonic crystal thus may have a three-dimensional geometric structure in any shape.
Moment method analysis of plane wave scattering from planar corrugated surfaces using parallel-plate cavity Green's functions and derivation of analytic reflection-phase formulas for both polarizations and oblique azimuth planes
(2012-06-07)
Kehn, M. Ng Mou
;
電信工程研究所
;
Institute of Communications Engineering
A rigorous but yet highly accurate and efficient numerical treatment of plane wave scattering by T-shaped planar corrugations through full-wave modal analysis is first presented in this paper, which entails the moment method using parallel-plate waveguide cavity Green's functions and a numerical spectral-domain Green's function for planar stratified media. Investigations in terms of both reflection-phase and dispersion diagrams are conducted. After validating with the commercial software package: CST Microwave Studio, this moment-method is in turn used to verify a formula derived by the transverse resonance technique (TRT) for the surface-wave propagation constant of corrugations in terms of the dispersion diagram. Correspondences between the reflection-phase and dispersion diagrams are then established by relating the high and low impedance frequencies in the former with the pass and stop bands of the latter. With the abovementioned formula, the way is paved for a novel derivation of explicit formulas for the reflection-phase of an incident plane wave impingent on the corrugations as closed-form analytic functions of the various parameters, even for oblique azimuth planes of incidence and for both TE and TM polarizations. Doing so, the high or low surface-impedance (AMC or AEC) properties of such corrugations can virtually be acquired instantly, thus providing incomparable speedup of the process of thorough reflection-phase characterization of AMC or high-impedance surfaces and soft surfaces, thus affording rapid designs of antennas and microwave devices that make use of them.
Effects of Porphyrinic meso-Substituents on the Photovoltaic Performance of Dye-Sensitized Solar Cells: Number and Position of p-Carboxyphenyl and Thienyl Groups on Zinc Porphyrins
(2012-06-07)
Ambre, Ram
;
Chen, Kwan-Bo
;
Yao, Ching-Fa
;
Luo, Liyang
;
Diau, Eric Wei-Guang
In order to understand the effects of meso-substituents of the zinc porphyrins on optical, electrochemical, and photovoltaic properties, a series of porphyrins with different combinations of thienyl (S) and p-carboxyphenyl (A) groups as the meso substituents have been systematically synthesized and studied. The properties of zinc complexes 3S1A, trans-2S2A, cis-2S2A, and 1S3A were fully investigated by absorption and emission spectra, attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectra, density functional theory (DFT) calculations, electrochemical, photophysical, and photovoltaic measurements. With the increasing number of meso-thienyl groups, slight red-shifts of Soret and Q bands were observed in both absorption and emission spectra. All of the absorption spectra of zinc porphyrins on TiO2 film show broadening and splitting of Soret bands because of excitonic coupling of porphyrins. ATR-FTIR spectra revealed likely modes to determine either a single arm (in 3S1A and trans-2S2A) or double arms (in 1S3A and cis-2S2A) attached on TiO2. Two factors of p-carboxyphenyl and thienyl groups affecting the devices performance-heavy atom effect and the amount of dye loading on TiO2-are concluded. Overall, the power conversion efficiencies (eta) of the devices exhibit the following order: 1S3A (3.0%) > cis-2S2A (2.5%) > trans-2S2A (1.8%) >> 3S1A (0.2%).
Nonvolatile floating gate memory containing AgInSbTe-SiO2 nanocomposite layer and capping the HfO2/SiO2 composite blocking oxide layer
(2012-06-08)
Chiang, Kuo-Chang
;
Hsieh, Tsung-Eong
;
材料科學與工程學系
;
Department of Materials Science and Engineering
An extremely large memory window shift of about 30.7 V and high charge storage density = 2.3 x 10(13) cm(-2) at +/- 23 V gate voltage sweep were achieved in the nonvolatile floating gate memory (NFGM) device containing the AgInSbTe (AIST)-SiO2 nanocomposite as the charge trap layer and HfO2/SiO2 as the blocking oxide layer. Due to the deep trap sites formed by high-density AIST nanocrystals (NCs) in the nanocomposite matrix and the high-barrier-height feature of the composite blocking oxide layer, a good retention property of the device with a charge loss of about 16.1% at +/- 15 V gate voltage stress for 10(4) s at the test temperature of 85 degrees C was observed. In addition to inhibiting the Hf diffusion into the programming layer, incorporation of the SiO2 layer prepared by plasma-enhanced chemical vapor deposition in the sample provided a good Coulomb blockade effect and allowed significant charge storage in AIST NCs. Analytical results demonstrated the feasibility of an AIST-SiO2 nanocomposite layer in memory device fabrication with a simplified processing method and post-annealing at a comparatively low temperature of 400 degrees C in comparison with previous NC-based NFGM studies.
道士資格無法管　民眾難辨
(2012-06-10)
曾意倫
;
Department of Communication and Technology
;
傳播與科技學系
所謂道士，是學道之人的泛稱，道士信奉道教教義，並以從事道教活動為職業。然而台灣社會尊重信仰自由，政府並未制定宗教法等相關規範，也因此一般民眾無法判定道士是否具有真才實料，甚至無法分辨真假道士。
寶藏巖　藝居尋共生　
(2012-06-10)
楊佳靜
;
Department of Communication and Technology
;
傳播與科技學系
寶藏巖聚落自注入藝居共生的概念後，成為台北市的文創景點。但寶藏巖成立初期卻因制度設計不健全，藝術家與居民的溝通產生阻礙，藝術與公共性之間也漸有失衡的傾向，成為寶藏巖共生聚落目前首要反思的課題。
藝文校園　交大新生命
(2012-06-10)
林儀
;
Department of Communication and Technology
;
傳播與科技學系
國立交通大學以理工科見長，在台灣產業界具有一定的領導地位。交大學生功課重，很多時間都拿來讀書了，似乎比較少有接觸藝文訊息的習慣，但這種情形在最近幾年有了極大的改變。
我的變胖日記
(2012-06-10)
李安媞
;
Department of Communication and Technology
;
傳播與科技學系
很多人都想要瘦身，很羨慕那些有目標又有自制力的人，可以為了減肥讓自己不吃甜的東西。我覺得我真的應該好好跟他們學習。
激情之後　後奧運效應
(2012-06-10)
李彥璋
;
Department of Communication and Technology
;
傳播與科技學系
倫敦奧運即將到來，必定吸引成千上萬的觀光客前往，但在奧運會後如何能夠避免「後奧運效應」也是一大難題。
草地小廚房　進攻校園
(2012-06-10)
蘇冠心
;
Department of Communication and Technology
;
傳播與科技學系
為鼓勵年輕人親自下廚，一群愛烹飪的台大生突發奇想，舉辦草地野餐式的廚藝競賽，由參賽者提供創意餐點，讓校園外食族能夠吃得健康，進而嘗試自己動手做。他們做創意料理，也展現年輕人追求簡單生活的態度。
兩岸軍備知多少
(2012-06-10)
胡哲揚
;
Department of Communication and Technology
;
傳播與科技學系
兩岸交流正頻繁，但是若哪天對岸不再友善，雙方的軍備落差到底會是平等競賽，又或將有重大懸殊？
總編輯的話
(2012-06-10)
吳孟芯
;
Department of Communication and Technology
;
傳播與科技學系
本週來到喀報的一百四十期，辛苦傳科系102級同學依舊努力不懈，堅持到現在。本期發稿量共二十四篇，以十一篇影像作品佔本期類目最多數，另有廣播、動畫Flash和文字作品的呈現。
不間斷的人生賽道　徐瑞德
(2012-06-10)
許雅筑
;
Department of Communication and Technology
;
傳播與科技學系
徐瑞德除了帶領大甲高中自由車隊之外，也是職業自由車隊前勁隊的總教練。徐瑞德在孕育選手方面不遺餘力，而他心中懷著一個職業化的夢。
公益彩券知多少
(2012-06-10)
楊依靜
;
Department of Communication and Technology
;
傳播與科技學系
我們現在所熟知的彩券，在中國古代時就以「彩票」存在。而公益彩券發行的目的，就是為了提升社會福利，並促進弱勢就業，因此，法規都有明訂公益彩券的餘額該如何分配，以及保障身心障礙者就業的權益。
金融海嘯　電子業衰退隱憂
(2012-06-10)
陳祐元
;
Department of Communication and Technology
;
傳播與科技學系
雖然金融海嘯已經過四年，但是它的影響並未衰退，反而引發許多後續事件。素來以理工科系聞名的交通大學特地舉辦多場財經論壇，說明後金融危機下台灣電子業的前景，希望激起學生的好奇心以及危機感。
尋找　更好的共存之道
(2012-06-10)
王俐文
;
Department of Communication and Technology
;
傳播與科技學系
TNR是指捕捉流浪動物並進行絕育後，再放回其原來生活的社區，企圖透過手術減緩流浪動物族群暴增的情況，並以此推廣「絕育代替撲殺」的概念。但這是否是除了撲殺之外的唯一解決辦法，仍有許多討論空間。
自律與他律　破除談話亂象
(2012-06-10)
胡乃文
;
Department of Communication and Technology
;
傳播與科技學系
談話性節目與日俱增，各台為了獲取高收視率，紛紛推出聳動的單元，如性感女星、卸妝、閨房情趣等；政論節目則是越來越有戲劇成分，從來賓們原本的唇槍舌戰、口沫橫飛，到現在連模仿、還原現場都出現了。
白雙雙　承接傳統的新血
(2012-06-10)
陳燕珩
;
Department of Communication and Technology
;
傳播與科技學系
現代年輕人追求外來流行文化，反而對台灣本土的傳統戲曲感到陌生。白雙雙在傳統與新時代的拉扯中，透過對傳統戲曲的熱愛，成為文化傳承的一股新血，也藉由在本土文化裡尋根的過程，在戲曲中感受更多人生價值。