Browsing by Issue Date, starting with "2012-09-24"

Now showing 1 - 20 of 35458

Abnormal interface state generation under positive bias stress in TiN/HfO2 p-channel metal-oxide-semiconductor field effect transistors
(2012-09-24)
Lo, Wen-Hung
;
Chang, Ting-Chang
;
Tsai, Jyun-Yu
;
Dai, Chih-Hao
;
Chen, Ching-En
This Letter studies positive bias stress-induced abnormal interface state on TiN/HfO2 p-channel metal-oxide-semiconductor field effect transistors. It can be found that the degradation is associated with electron trapping, resulting in V-th shift but without subthreshold slope degradation. However, charge pumping current (I-CP) shows a significant degradation after stress. Accordingly, the impact ionization-induced Nit located HfO2/SiO2 is proposed to demonstrate the ICP degradation. The AC stress with several frequencies is used to evidence the occurrence of impact ionization. Further, the device with additional pre-existing N-it located SiO2/Si has insignificant degradation due to reduction in stress electric field. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4752456]
Performance enhancement of sub-nanosecond diode-pumped passively Q-switched Yb:YAG microchip laser with diamond surface cooling
(2012-09-24)
Zhuang, W. Z.
;
Chen, Yi-Fan
;
Su, K. W.
;
Huang, K. F.
;
Chen, Y. F.
We experimentally confirm that diamond surface cooling can significantly enhance the output performance of a sub-nanosecond diode-end-pumped passively Q-switched Yb:YAG laser. It is found that the pulse energy obtained with diamond cooling is approximately 1.5 times greater than that obtained without diamond cooling, where a Cr4+:YAG absorber with the initial transmission of 84% is employed. Furthermore, the standard deviation of the pulse amplitude peak-to-peak fluctuation is found to be approximately 3 times lower than that measured without diamond cooling. Under a pump power of 3.9 W, the passively Q-switched Yb: YAG laser can generate a pulse train of 3.3 kHz repetition rate with a pulse energy of 287 mu J and with a pulse width of 650 ps. (C)2012 Optical Society of America
Effects of microwave annealing on electrical enhancement of amorphous oxide semiconductor thin film transistor
(2012-09-24)
Teng, Li-Feng
;
Liu, Po-Tsun
;
Lo, Yuan-Jou
;
Lee, Yao-Jen
;
光電學院
By using microwave annealing technology instead of thermal furnace annealing, this work elucidates the electrical characteristics of amorphous InGaZnO thin film transistor (a-IGZO TFT) with a carrier mobility of 13.5 cm(2)/Vs, threshold voltage of 3.28 V, and subthreshold swing of 0.43 V/decade. This TFT performance with microwave annealing of 100 s is well competitive with its counterpart with furnace annealing at 450 degrees C for 1 h. A physical mechanism for the electrical improvement is also deduced. Owing to its low thermal budget and selective heating to materials of interest, microwave annealing is highly promising for amorphous oxide in semiconductor TFT manufacturing. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4754627]
Finger-gate manipulated quantum transport in a semiconductor narrow constriction with spin-orbit interactions and Zeeman effect
(2012-09-24)
Tang, Chi-Shung
;
Chang, Shu-Yu
;
Cheng, Shun-Jen
;
電子物理學系
;
Department of Electrophysics
The authors investigate quantum transport in a narrow constriction fabricated by narrow-band-gap semiconductor materials with spin-orbit couplings. We consider the Rashba-Dresselhaus (RD) spin-orbit interactions (SOIs) and the Zeeman effect induced by an in-plane magnetic field along the transport direction. The interplay of the RD SOI and the Zeeman effect may induce a SOI-Zeeman gap and influence the transport properties. We demonstrate that an attractive scattering potential may induce an electronlike quasi-bound-state feature and manifest the RD-SOI-Zeeman induced Fano line shape in conductance. Furthermore, a repulsive scattering potential may induce a holelike quasi-bound-state feature on the subband top of the lower spin branch.
Energy-efficient and reliable multicasting for WiMAX multi-hop relay networks
(2012-09-25)
Chen, C-Y
;
Jia, W-K
;
Chen, Y-C
;
資訊工程學系
;
Department of Computer Science
Orthogonal frequency division multiplexing (OFDM)-based wireless transmission technologies such as WiMAX are now widely deployed, and the frame check sequence (FCS) scheme is used to enhance the reliability of OFDM-based systems. As the padding overhead cannot be completely avoided in such systems when variable-length medium access control (MAC) frames are encapsulated, the authors propose a novel cyclic redundancy check (CRC)-based error-correction scheme that utilises the frame padding overhead to carry as much extra segmented FCS information as possible. In a multi-hop relay environment, a mobile station might receive a multicast frame more than once, so the error bit correction scheme could be triggered in the first transmission. In the IEEE's work, the original CRC scheme is optional and only has limited error-detection capability in upper MAC layer. FCS requires a few bits in a frame, but in our work, CRC is compulsory and all sub-FCSs are carried by padding space without using any extra bit. For the best error-correction capability, all transmissions must be padded as many sub-FCSs are possible in cross layer. The proposed approach achieves a significant performance improvement over the legacy FCS scheme in terms of error detection and correction of multicast frames in a transparent mode multi-hop relay network, and it is redundancy-free as well as energy efficient. The authors assess the performance improvement via both mathematical analysis and simulations. The results show that the mobile stations get significant improvement of goodput and utilisation in an error-prone WiMAX multi-hop relay network.
Position-dependent correlations between DNA methylation and the evolutionary rates of mammalian coding exons
(2012-09-25)
Chuang, Trees-Juen
;
Chen, Feng-Chi
;
Chen, Yen-Zho
;
生物科技學系
;
Department of Biological Science and Technology
DNA cytosine methylation is a central epigenetic marker that is usually mutagenic and may increase the level of sequence divergence. However, methylated genes have been reported to evolve more slowly than unmethylated genes. Hence, there is a controversy on whether DNA methylation is correlated with increased or decreased protein evolutionary rates. We hypothesize that this controversy has resulted from the differential correlations between DNA methylation and the evolutionary rates of coding exons in different genic positions. To test this hypothesis, we compare human-mouse and human-macaque exonic evolutionary rates against experimentally determined single-base resolution DNA methylation data derived from multiple human cell types. We show that DNA methylation is significantly related to within-gene variations in evolutionary rates. First, DNA methylation level is more strongly correlated with C-to-T mutations at CpG dinucleotides in the first coding exons than in the internal and last exons, although it is positively correlated with the synonymous substitution rate in all exon positions. Second, for the first exons, DNA methylation level is negatively correlated with exonic expression level, but positively correlated with both nonsynonymous substitution rate and the sample specificity of DNA methylation level. For the internal and last exons, however, we observe the opposite correlations. Our results imply that DNA methylation level is differentially correlated with the biological (and evolutionary) features of coding exons in different genic positions. The first exons appear more prone to the mutagenic effects, whereas the other exons are more influenced by the regulatory effects of DNA methylation.
史學vs.文學：連橫《臺灣通史》透視
(2012-09-26)
黃富三
;
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。
Antigenic sites of H1N1 influenza virus hemagglutinin revealed by natural isolates and inhibition assays
(2012-09-28)
Huang, Jhang-Wei
;
Lin, Wei-Fan
;
Yang, Jinn-Moon
;
生物科技學系
;
生物資訊及系統生物研究所
The antigenic sites of hemagglutinin (HA) are crucial for understanding antigenic drift and vaccine strain selection for influenza viruses. In 1982,32 epitope residues (called laboratory epitope residues) were proposed for antigenic sites of H1N1 HA based on the monoclonal antibody-selected variants. Interestingly, these laboratory epitope residues only cover 28% (23/83) mutation positions for 9 H1N1 vaccine strain comparisons (from 1977 to 2009). Here, we propose the entropy and likelihood ratio to model amino acid diversity and antigenic variant score for inferring 41 H1N1 HA epitope residues (called natural epitope residues) with statistically significant scores according to 1572 HA sequences and 197 pairs of HA sequences with hemagglutination inhibition (HI) assays of natural isolates. By combining both natural and laboratory epitope residues, we identified 62 (11 overlapped) residues clustered into five antigenic sites (i.e., A-E) which are highly correlated to the antigenic sites of H3N2 HA. Our method recognizes sites A, B and C as critical sites for escaping from neutralizing antibodies in H1N1 virus. Experimental results show that the accuracies of our models are 81.2% and 82.2% using 41 and 62 epitope residues, respectively, for predicting antigenic variants on 197 paring HA sequences. In addition, our model can detect the emergence of epidemic strains and reflect the genetic diversity and antigenic variant between the vaccine and circulating strains. Finally, our model is theoretically consistent with the evolution rates of H3N2 and H1N1 viruses and is often consistent to WHO vaccine strain selections. We believe that our models and the inferred antigenic sites of HA are useful for understanding the antigenic drift and evolution of influenza A H1N1 virus. (C) 2012 Elsevier Ltd. All rights reserved.
青年當家　學生創業新思潮
(2012-09-30)
張芮瑜
;
Department of Communication and Technology
;
傳播與科技學系
學生創業在國外掀起一陣新潮流，國內近年各大學也相繼推出各種方案刺激學生創新創業的頭腦。交大管理學院即在今年推出創新創業學程，提供有興趣的同學更多元的學習管道，資工系同學也自主建立「交大創業俱樂部」，希望號召同好一同交流討論。
我的社會運動元年
(2012-09-30)
王柔婷
;
Department of Communication and Technology
;
傳播與科技學系
今年算是許多人年輕人的社會運動元年，從反核遊行、文林苑都更、到旺中集團併購案等，年輕學生開始站出來，表達自己的心聲。我以反核議題作為我踏入社會運動的開端，帶出反核與擁核的兩方意見，並陳述自己的看法。
視而不見也是一種勇氣
(2012-09-30)
陳儀澧
;
Department of Communication and Technology
;
傳播與科技學系
每本書寫成的過程，必然會和作者所處的時代有所關聯，近年來日本與中國的關係日益緊張，或許可以說是過度解釋，但是從伊坂的這本小說當中，彷彿能看見了伊坂對於中國的"有話想說"。
來自《星期二的匿名信》
(2012-09-30)
姜藍茵
;
Department of Communication and Technology
;
傳播與科技學系
──奉愛之名，妳竭力地用謊言包裝真相，好讓秘密被釋放的那一刻，能為當初的愛恨下每一個註釋。「想要撼動人生，很難有比死去母親更好的辦法。」卡蜜兒在母親過世後收到自稱路易的男子的信，而她萬萬想不到這些匿名信將改變她的世界。
記憶中的　這些人　那些事
(2012-09-30)
薛世如
;
Department of Communication and Technology
;
傳播與科技學系
如果說人生就像沒有底稿的舞台，那麼台上的演員、劇情的發展，是一種時空錯置造就的巧合﹖還是一種緣分累積醞釀成的邂逅﹖親人、友人、戀人，趣事、瑣事、心事，彼此間的縱橫交錯增添了人生舞台的繽紛。
總編輯的話
(2012-09-30)
鄭姿筠
;
Department of Communication and Technology
;
傳播與科技學系
本期一四二期喀報，是傳科103級同學的喀報處女作，雖然稍顯生澀，卻也有不少表現出色的作品。此次文章以影評最多，其次為書評，雖說量多，但內容涵蓋的範圍很豐富，並無重覆或相近的問題。同學們多有嘗試避免將評論淪為心得抒發，並於拓展其內容之深度和廣度方面可看見大家的用心。
芭蕾把足尖踮在血淚上
(2012-09-30)
王紹容
;
Department of Communication and Technology
;
傳播與科技學系
芭蕾舞成為電影的題材日益增多，本文比較近四年的四部芭蕾電影，《芭蕾少女》《3D舞力對決》《黑天鵝》《芭蕾首部曲》，其在探討主題與表現手法上的異同。
金屬女聲　唱出生命與信仰
(2012-09-30)
廖敏廷
;
Department of Communication and Technology
;
傳播與科技學系
介紹Flyleaf(飛葉樂團)的音樂風格與專輯，並介紹一些關於他的歌曲意義。
室外池的規格與安全取捨
(2012-09-30)
楊敦元
;
Department of Communication and Technology
;
傳播與科技學系
國立交通大學於今年(101年)9月24日正式啟用戶外游泳池，而這外觀美麗的泳池並未完全符合正式比賽規格，此點引發了些許不滿的聲音。當學生安全與正式比賽規格的訴求互相衝突時，究竟該如何取捨?
沒有人不會唱的　飛龍在天
(2012-09-30)
吳悅萍
;
Department of Communication and Technology
;
傳播與科技學系
大家都看的台灣鄉土劇，大家都會唱的鄉土劇主題曲－《飛龍在天》是民視在民國八十九年時播出的八點檔連續劇，以少有的歷史故事手法，開啟了台灣本土劇一條不一樣的路。
他們說的話　什麼是真的
(2012-09-30)
賴巧純
;
Department of Communication and Technology
;
傳播與科技學系
生活中無處不消費，商場上的利益競逐，造就公關無所不在。官員、學者、記者口中的話，街上的抗議行動，很有可能都是公關公司為了使自己和客戶獲得某種利益一手策劃的。
從人妻日記裡窺見愛
(2012-09-30)
姚映竹
;
Department of Communication and Technology
;
傳播與科技學系
當一份愛情自在地跨越了性別，又當這是一個私人隨寫撞擊社群媒體的時代，便由陳雪和早餐人一起描繪出了《人妻日記》裡片片日常卻動人的光景。