Browsing by Issue Date, starting with "2010-01-04"

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Blinking suppression of single quantum dots in agarose gel
(2010-01-04)
Ko, H. C.
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Yuan, C. T.
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Lin, S. H.
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Tang, Jau
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應用化學系
Fluorescence blinking is commonly observed in single molecule/particle spectroscopy, but it is an undesirable feature in many applications. We demonstrated that single CdSe/ZnS quantum dots in agarose gel exhibited suppressed blinking behavior. In addition, the long-time exponential bending tail of the power-law blinking statistics was found to be influenced by agarose gel concentration. We suggest that electron transfer from the light state to the dark state might be blocked due to electrostatic surrounding of gel with inherent negatively charged fibers.
交大e-News第063期
(2010-01-05)
Secretariat
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國立交通大學秘書室
The effect of sulfonic acid groups within a polyhedral oligomeric silsesquioxane containing cross-linked proton exchange membrane
(2010-01-06)
Yen, Ying-Chieh
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Ye, Yun-Sheng
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Cheng, Chih-Chia
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Lu, Chu-Hua
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Tsai, Li-Duan
In this study, polyhedral oligomeric silsesquioxane (POSS) moieties were incorporated into sulfonated poly(ether ether ketone) (SPEEK) to form a new cross-linked proton exchange membrane (PEM). The distribution of the POSS containing cross-linkers with or without sulfonic acid groups dictates the water behavior and connectivity of hydrophilic domains of the PEM. A PEM formed by incorporating 17.5 wt% of the cross-linker (containing POSS macromer and sulfonic acid groups) into SPEEK exhibits high proton conductivity (0.0153 S/cm), low methanol permeability (1.34 x 10(-7) cm(2)/s), and high selectivity (1.14 x 10(5) Ss/cm(3)). (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis and characterization of side-chain liquid-crystalline block-copolymers containing laterally attached photoluminescent quinquephenyl units via ATRP
(2010-01-06)
Wang, Ling-Yung
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Li, Kuang-Chieh
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Lin, Hong-Cheu
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材料科學與工程學系
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Department of Materials Science and Engineering
A series of novel side-chain liquid-crystalline polymers (SCLCPs) consisting of laterally attached photoluminescent p-quinquephenyl (QQP) pendants with different flexible terminal- and/or side-alkoxy chains were synthesized via atom transfer radical polymerization (ATRP). Homopolymers (HP1-HP3) and block-copolymers (PSP1-PSP3 and PEOP1-PEOP3), where QQP units were copolymerized with styrene or ethylene oxide monomers, possessed the number average molecular weights (M(n)) of 8.7-26.0 x 10(3) with narrow PDI values of 1.08-1.26. Various characterization techniques of polarized optical microscopy (POM), differential scanning calorimetry (DSC), and X-ray diffraction (XRD) were used to investigate their mesomorphic properties, and all homopolymers and block-copolymers exhibited the nematic phase affected by the flexible terminal- and/or side-alkoxy chains of the conjugated rod-like pendants. In addition, the photophysical properties of these polymers were measured by UV-vis and photoluminescence (PL) spectroscopies, which showed blue PL emissions with rather high fluorescence quantum yields in solutions. (C) 2009 Elsevier Ltd. All rights reserved.
Induction of HSPA4 and HSPA14 by NBS1 overexpression contributes to NBS1-induced in vitro metastatic and transformation activity
(2010-01-06)
Wu, Chung-Yin
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Lin, Chih-Ta
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Wu, Min-Zu
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Wu, Kou-Juey
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生物資訊及系統生物研究所
Background: Nijmegen breakage syndrome (NBS) is a chromosomal-instability syndrome associated with cancer predisposition, radiosensitivity, microcephaly, and growth retardation. The NBS gene product, NBS1 (p95) or nibrin, is a part of the MRN complex, a central player associated with double-strand break (DSB) repair. We previously demonstrated that NBS1 overexpression contributes to transformation through the activation of PI 3-kinase/Akt. NBS1 overexpression also induces epithelial-mesenchymal transition through the Snail/MMP2 pathway. Methods: RT-PCR, Western blot analysis, in vitro migration/invasion, soft agar colony formation, and gelatin zymography assays were performed. Results: Here we show that heat shock protein family members, A4 and A14, were induced by NBS1 overexpression. siRNA mediated knockdown of HSPA4 or HSPA14 decreased the in vitro migration, invasion, and transformation activity in H1299 cells overexpressing NBS1. However, HSPA4 or HSPA14 induced activity was not mediated through MMP2. NBS1 overexpression induced the expression of heat shock transcription factor 4b (HSF4b), which correlated with the expression of HSPA4 and HSPA14. Conclusion: These results identify a novel pathway (NBS1-HSF4b-HSPA4/HSPA14 axis) to induce migration, invasion, and transformation, suggesting the activation of multiple signaling events induced by NBS1 overexpression.
Low-density high-toughness alloy and the fabrication method thereof
(2010-01-07)
Liu, Tzeng-Feng
;
Lee, Jian-Wei
The present invention discloses a low-density high-toughness alloy and the fabrication method thereof. The alloy of the present invention consists essentially of: by weight percent, equal to or greater than 23% but lower than or equal to 33% manganese, equal to or greater than 8.1% but lower than or equal to 9.8% aluminum, equal to or greater than 3% but lower than or equal to 5.0% chromium, equal to or greater than 0.6% but lower than or equal to 1.2% carbon, equal to or greater than 0.1% but lower than or equal to 0.24% silicon and the balance of iron. The golf-club head made from the abovementioned alloy can obtain superior elongation, strength, damping capacity, and corrosion resistance even without any heat treatment, or any hot/cold working, such as forging and rolling; therefore, the fabrication cost thereof can be obviously reduced.
Kinetic isotope effect on the proton-transfer in indigo carmine
(2010-01-07)
Iwakura, Izumi
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Yabushita, Atsushi
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Kobayashi, Takayoshi
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電子物理學系
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Department of Electrophysics
We have found that photo-excited indigo carmine causes stepwise proton transfer to generate mono-alcohol intermediate, which immediately returns to the parent molecule [I. Iwakura, A. Yabushita, T. Kobayashi, Chem. Lett. 38 (2009) 1020]. The kinetic isotope effect in the proton transfer of this system has been studied by direct observation of the real-time molecular vibrational amplitude during the reaction including the transition state using a sub-5-fs laser pulse. The k(a)(H)/k(a)(D) ratio for the proton transfer after photo-excitation is observed to be 1.5 +/- 0.1. (C) 2009 Elsevier B.V. All rights reserved.
《喀報》放寒假囉！
(2010-01-10)
《喀報》
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Department of Communication and Technology
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傳播與科技學系
感謝您對《喀報》的支持，傳科100級《喀報》將於2010年1月中的寒假期間停止供稿，停刊期間敬請見諒。待二月下旬開學後，《喀報》將會很快恢復出刊，也請繼續支持。
教育─偏遠小孩的美麗救贖
(2010-01-10)
林穎瑄
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Department of Communication and Technology
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傳播與科技學系
偏遠地區孩童的教育資源遠不及都市中的學童，此外，城鄉落差、資訊落差資訊讓偏遠地區學童更加沒有競爭力，而且持續惡性循環著。
性別友善宿舍　大器晚成
(2010-01-10)
賴合新
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Department of Communication and Technology
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傳播與科技學系
十二月三十日晚上六點，國立台灣大學圖書館前，有一群大學生，不分男女的忙著在草坪上搭帳篷、設交誼廳，也藉機尋覓新室友。當晚，他們在那「共度良宵」。原本只是女性主義理論的課堂活動，學生們付諸行動，為發展「性別友善宿舍」鋪路。然而，打者台灣第一學府名號所發起的運動，理所當然會被各界放大檢視。也因此，這個校園運動搖身一變，成為社會共同關注與討論的議題，也挑戰了台灣社會的傳統價值觀。
被監控的年代　《一九八四》
(2010-01-10)
許庭瑜
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Department of Communication and Technology
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傳播與科技學系
戰爭就是和平自由就是奴役無知就是力量
第一線輔導員　教官陳天生
(2010-01-10)
郭伯宇
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Department of Communication and Technology
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傳播與科技學系
陳天生，交通大學最新的校安輔導員，每天奔波位學生服務成為他的生活中最重要的一部份。
比麟水庫　泰雅族住民憂心
(2010-01-10)
徐瑩峰
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Department of Communication and Technology
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傳播與科技學系
去年八八水災以來，泥沙大量淤積在河川、水庫，加上台灣降雨季節分配不均，導致缺水問題逐漸浮上檯面。總統馬英九甚至為此召開小型國安會議，匯集各部會首長研商抗旱方案，也提出三百六十億的清淤預算，希望解決南部缺水問題。雖然新竹缺水問題雖然不如南部嚴重，但是為了因應民國一百二十年增加的用水量，經濟部水利署在新竹縣尖石鄉，進行比麟水庫的規劃案。消息一傳開，引來當地居民與環保團體的反抗聲浪。
雙手掙來的生存權
(2010-01-10)
張國鍵
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Department of Communication and Technology
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傳播與科技學系
在不同性質的勞務中，人們必須不斷摸索，挖掘出屬於自己的角色與定位，以維護生存權。這個社會中，存在著一群憑藉自己的勞力，以求生活溫飽與家庭支柱，而默默埋頭苦幹的藍領階級。他們的付出，造就社會的蓬勃發展；他們的辛勞，為人們帶來最舒適的生活環境。同樣身為社會中的一份子，這些社會幕後推手的努力，更應被重視。
陳寧慧彩妝人生
(2010-01-10)
徐鈺婷
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Department of Communication and Technology
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傳播與科技學系
彩妝部落格擁有百萬人氣的彩妝師陳寧慧，與其叫她時尚彩妝教主，她更愛別人稱她一聲kelly老師。Kelly不諱言由於網路的發達，部落格帶給她許多工作和教學上的機會。
起跑點的競爭　金錢堆積的教育
(2010-01-10)
林詩雯
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Department of Communication and Technology
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傳播與科技學系
少子化的時代，每個孩子都是家長心中的寶，而國小教育是孩子社會化的起頭，教育絕對不容忽視。為了孩子的成長，家長砸下大錢也在所不惜，此時也形成了國小學童家庭背景結構的社會階級差異。
Improved performance and reliability for metal-oxide-semiconductor field-effect-transistor with fluorinated silicate glass passivation layer
(2010-01-11)
Hsieh, Chih-Ren
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Chen, Yung-Yu
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Lou, Jen-Chung
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電機工程學系
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Department of Electrical and Computer Engineering
The superior characteristics of the fluorinated HfO(2)/SiON gate dielectric are investigated comprehensively. Fluorine is incorporated into the gate dielectric through fluorinated silicate glass (FSG) passivation layer to form fluorinated HfO(2)/SiON dielectric. Fluorine incorporation has been proved to eliminate both bulk and interface trap densities due to Hf-F and Si-F bonds formation, which can strongly reduce trap generation as well as trap-assisted tunneling during subsequently constant voltage stress, and results in improved electrical characteristics and dielectric reliabilities. The results clearly indicate that the fluorinated HfO(2)/SiON gate dielectric using FSG passivation layer becomes a feasible technology for future ultrathin gate dielectric applications.
汽車虛擬環繞音響系統
(2010-01-11)
白明憲
;
李志中
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陳暉文
本發明係有關於一種汽車虛擬環繞音響系統，其設置於汽車上以接收一二聲道音源。一空間合成器接收二聲道音源之左聲道音源及右聲道音源，並擴展為一暫時後左聲道音源及一暫時後右聲道音源。一加權裝置接收二聲道音源之左聲道及右聲道音源，經加權運算產生一暫時前左聲道音源及一暫時前右聲道音源。一第一濾波器接收暫時前左聲道及暫時前右聲道音源，經濾波而產生虛擬前左聲道音源及虛擬前右聲道音源。一第二濾波器接收暫時後左聲道音源及暫時後右聲道音源，經濾波而產生一虛擬後左聲道音源及一虛擬後右聲道音源。藉此，俾重現虛擬音像位置。【創作特點】本發明之主要目的係在提供一種汽車虛擬環繞音響系統，俾能解決習知技術中僅將音源信號訊號送到汽車後面揚聲器，沒有立體音的感覺之問題。同時，本發明利用空間合成器(Reverberator)產生環繞聲道的訊號，除了讓前後播放內容有不同之外，也產生適當的空間感來補足定位的不足。依據本發明之一特色，本發明係提出一種汽車虛擬環繞音響系統，其設置於一汽車上以接收一二聲道音源，俾重現正確虛擬音像位置，該系統包含一空間合成器、一加權裝置、一第一濾波器及一第二濾波器。該空間合成器接收該二聲道音源播之一左聲道音源及一右聲道音源，並擴展為一暫時後左聲道音源、一暫時後右聲道音源。該加權裝置接收該二聲道音源播之一左聲道音源及一右聲道音源，經加權運算產生一暫時前左聲道音源及一暫時前右聲道音源。該第一濾波器接收該暫時前左聲道音源及該暫時前右聲道音源，經濾波而產生一虛擬前左聲道音源及一虛擬前右聲道音源。該第二濾波器接收該暫時後左聲道音源及該暫時後右聲道音源，經濾波而產生一虛擬後左聲道音源及一虛擬後右聲道音源。依據本發明之另一特色，本發明係提出一種汽車虛擬環繞音響系統，其設置於一汽車上以接收一二聲道音源，俾重現正確虛擬音像位置，該系統包含一空間合成器及一第三濾波器。該空間合成器接收該二聲道音源播之一左聲道音源及一右聲道音源，並擴展為一暫時後左聲道音源、一暫時後右聲道音源、一暫時前左聲道音源及一暫時前右聲道音源。該第三濾波器連接至該空間合成器，並接收該暫時後左聲道音源、該暫時後右聲道音源、該暫時前左聲道音源及該暫時前右聲道音源，經濾波而產生一虛擬後左聲道音源、一虛擬後右聲道音源、一虛擬前左聲道音源及一虛擬前右聲道音源。其中，該虛擬前左聲道音源係由該暫時前左聲道音源加上該暫時後左聲道音源，該虛擬後左聲道音源係該虛擬前左聲道音源經一加權運算及一遲延運算而產生，該虛擬前右聲道音源係由該暫時前右聲道音源加上該暫時後右聲道音源，該虛擬後右聲道音源係該虛擬前右聲道音源經該加權運算及該遲延運算而產生。依據本發明之再一特色，本發明係提出一種汽車虛擬環繞音響系統，其設置於一汽車上以接收一五聲道音源，俾重現正確虛擬音像位置，該系統包含一空間合成器、一第一濾波器及一第二濾波器。該空間合成器接收該五聲道音源播之一前左聲道音源、一前右聲道音源及一中央聲道音源，並擴展為一暫時前左聲道音源及一暫時前右聲道音源。該第一濾波器連接至該空間合成器，並接收該暫時前左聲道音源及該暫時前右聲道音源，經濾波而產生一虛擬前左聲道音源及一虛擬前右聲道音源。該第二濾波器接收該五聲道音源播之一後左聲道音源及一後右聲道音源，經濾波而產生一虛擬後左聲道音源及一虛擬後右聲道音源。依據本發明之又一特色，本發明係提出一種汽車虛擬環繞音響系統，其設置於一汽車上以接收一五聲道音源播俾重現正確虛擬音像位置，該系統包含一空間合成器及一第三濾波器。該空間合成器接收該五聲道音源播之一前左聲道音源、一前右聲道音源、一後左聲道音源、一後右聲道音源及一中央聲道音源，並擴展為一暫時後左聲道音源、一暫時後右聲道音源、一暫時前左聲道音源及一暫時前右聲道音源該第三濾波器連接至該空間合成器，並接收該暫時後左聲道音源、該暫時後右聲道音源、該暫時前左聲道音源及該暫時前右聲道音源，經濾波而產生一虛擬後左聲道音源、一虛擬後右聲道音源、一虛擬前左聲道音源及一虛擬前右聲道音源。該虛擬前左聲道音源係由該暫時前左聲道音源加上該暫時後左聲道音源，該虛擬後左聲道音源係該虛擬前左聲道音源經一加權運算及一遲延運算而產生，該虛擬前右聲道音源係由該暫時前右聲道音源加上該暫時後右聲道音源，該虛擬後右聲道音源係該虛擬前右聲道音源經該加權運算及該遲延運算而產生。
Morphologies of Self-Organizing Regioregular Conjugated Polymer/Fullerene Aggregates in Thin Film Solar Cells
(2010-01-12)
Chiu, Mao-Yuan
;
Jeng, U-Ser
;
Su, Ming-Shin
;
Wei, Kung-Hwa
;
材料科學與工程學系
In this study, We used simultaneous synchrotron grazing incidence X-ray scattering and diffraction to elucidate the overall morphologies of bulk heterojunction (BHJ) thin film (ca. 100 nm) solar cells containing phase-separated poly(3-hexylthiophene) (P3HT) and [6,6]-phertyl-C(61)-butyric acid methyl ester (PCBM) domains. Specifically, the dimensions and orientation of the P3HT crystallites and the sizes of the PCBM aggregates in BHJ thin films were determined. The appropriate PCBM aggregate size and density required for all optimum performance of the film in the photovoltaics device resulted in deteriorated ordering in the out-of-plane direction, but improved the in-plane packing of the P3HT lamellae. When the P3HT crystallites and PCBM aggregates had comparable domain sizes and number densities, the interpercolated networks for electron- and hole-transport were optimized in the film. This new understanding of the underlying mechanism of carrier mobility in BHJ thin films might be crucial in improving the efficiency of future solar cells.
Identification of the mokH Gene Encoding Transcription Factor for the Upregulation of Monacolin K Biosynthesis in Monascus pilosus
(2010-01-13)
Chen, Yi-Pei
;
Yuan, Gwo-Fang
;
Hsieh, Sung-Yuan
;
Lin, Yu-Shan
;
Wang, Wei-Yi
Monacolin K is a secondary metabolite synthesized by polyketide synthases (PKS) from Monascus. The monacolin K biosynthetic gene cluster, mokA-mokI, has been characterized in Monascus pilosus. The mokH gene encoding Zn(II)2Cys6 binuclear DNA binding protein is assumed to be an activator for monacolin K production. In this study, the mokH gene was cloned and driven by the glyceraldehyde-3-phosphate dehydrogenase (gpd) promoter for overexpression in M. pilosus. The transformants containing an extra copy of the mokH gene were obtained and verified by PCR and Southern hybridization. The transcripts of mokH in the transformants were expressed significantly higher than those of the wild-type strain. The transformants were stably inherited through the next generation, as determined by observation of the enhanced green fluorescent protein (EGFP). The transformant T-mokH1 also showed a 1.7-fold higher production of monacolin K than the wild-type strain in a time course analysis. Analysis of the RT-PCR products demonstrated that the monacolin K biosynthetic genes in the transformant were expressed to a greater extent than those in the wildtype strain. These results indicated that mokH upregulated the transcription of monacolin K biosynthetic genes and increased monacolin K production.