Browsing by Issue Date, starting with "2014-03-15"

Now showing 1 - 20 of 27340

Generation of multi-color carrier-envelope phase locked pulse with continuous color tunability
(2014-03-15)
Yabushita, Atsushi
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Juang, Ding-Yi
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Kao, Chih-Hsien
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Baltuska, Andrius
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Kobayashi, Takayoshi
Several methods exist to lock carrier envelope phase (CEP), which is generally not locked in common laser systems. Our previous work succeeded passive lock of CEP by using a technique of non-collinear optical parametric amplifier. In the present work, we have proposed and demonstrated two schemes to generate multi-color CEP-locked beams using the non-collinear optical parametric amplifier. In the first scheme, spatial filter in the spatially dispersed seed light was used to generate three-color CEP-locked pulse demonstrating ifs arbitral color tunability. In the second scheme, parabolic chirp was introduced on the seed pulse to generate two color CEP-locked pulses with continuous color tunability. (C) 2013 Elsevier B.V. All rights reserved.
Efficient high-power terahertz beating in a dual-wavelength synchronously mode-locked laser with dual gain media
(2014-03-15)
Huang, Y. J.
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Tzeng, Y. S.
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Tang, C. Y.
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Chiang, S. Y.
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Liang, H. C.
We originally present a novel tactic to accomplish a compact efficient dual-wavelength synchronously mode-locked laser by physically combining the Nd:YVO4 crystal to the Nd: GdVO4 crystal as a composite gain medium. With the developed method, the total output power at 1.06 mu m could be effectually produced to reach 1.3 W under the optimally balanced two-color intensities. The corresponding mode-locked pulse width and repetition rate are measured to be 47 ps and 2.86 GHz, respectively. Through the optical beating between two carrier frequencies of dual-color synchronous pulses, a train of 0.32 THz ultrashort pulses is further generated with the effective duration of down to 1.6 ps. (C) 2014 Optical Society of America
The Role of Psychosocial and Cultural Factors as Correlates of Depressive Symptoms in Chinese-American Older Adults
(2014-03-15)
Lin, Shumin
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Liu, Jielin
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Jang, Yuri
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英語教學研究所
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Institute of Teaching English to speakers of other Languages
Building upon the literature showing the negative impact of physical health constraints on depressive symptoms, this study examined the role of health and psychosocial and cultural factors as correlates of depressive symptoms in community-dwelling Chinese-American older adults. Data were drawn from surveys with 108 older Chinese Americans living in the Tampa and Orlando areas of Florida (M age = 70.6 years, SD=7.70). Results from hierarchical regression analysis suggest the importance of chronic health conditions and functional status as correlates of depressive symptoms. In addition, high levels of sense of mastery and acculturation were also found to be significant. Findings highlight the importance of psychosocial and cultural factors and suggest that such factors need to be considered in efforts to promote the mental health of ethnic minority older adults. Limitations and clinical implications of the findings are discussed.
Effective and site-specific phosphoramidation reaction for universally labeling nucleic acids
(2014-03-15)
Su, Yu-Chih
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Chen, Hsing-Yin
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Ko, Ni Chien
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Hwang, Chi-Ching
;
Wu, Min Hui
Here we report efficient and selective postsynthesis labeling strategies, based on an advanced phosphoramidation reaction, for nucleic acids of either synthetic or enzyme-catalyzed origin. The reactions provided phosphorimidazolide intermediates of DNA or RNA which, whether reacted in one pot (one-step) or purified (two-step), were directly or indirectly phosphoramidated with label molecules. The acquired fluorophore-labeled nucleic acids, prepared from the phosphoramidation reactions, demonstrated labeling efficacy by their F/N ratio values (number of fluorophores per molecule of nucleic acid) of 0.02-1.2 which are comparable or better than conventional postsynthesis fluorescent labeling methods for DNA and RNA. Yet, PCR and UV melting studies of the one-step phosphoramidation-prepared FITC-labeled DNA indicated that the reaction might facilitate nonspecific hybridization in nucleic acids. Intrinsic hybridization specificity of nucleic acids was, however, conserved in the two-step phosphoramidation reaction. The reaction of site-specific labeling nucleic acids at the 5'-end was supported by fluorescence quenching and UV melting studies of fluorophore-labeled DNA. The two-step phosphoramidation-based, effective, and site-specific labeling method has the potential to expedite critical research including visualization, quantification, structural determination, localization, and distribution of nucleic acids in vivo and in vitro. (C) 2013 Elsevier Inc. All rights reserved.
Solid solution strengthening and phase transformation in high-temperature annealed Si80Ge20 alloy
(2014-03-15)
Chiang, Tun-Yuan
;
Wen, Hua-Chiang
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Chou, Wu-Ching
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Tsai, Chien-Huang
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電子物理學系
This investigation demonstrates the temperature-dependent mechanical properties of Si80Ge20 alloy films via a nanoindenter in the indentation depth of 100 nm. The roughly equal root mean square roughness (R-rms) values and repeatable load-displacement (P-delta) curves for the samples ensure the mechanical performances mainly contributed from the influences of annealing temperatures. The hardness (H) values of samples increase with the temperatures of an initial annealing in the range from RT to 900 degrees C, and, conversely, decrease for annealing temperatures over 900 degrees C. Accordingly, both E/H and h(r)/h(max) values, exhibiting an inverse tendency in the above temperature range, hints that the solid solution strengthening effect and the softening phenomenon occur for the initial-annealing and over-annealing stages, respectively. In addition, grazing incidence X-ray diffraction (GIXRD) analysis demonstrates the lattice expansion and the broadened peak that attribute to the solid solution strengthening of samples and the segregation of Ge, respectively. Through observing the value of the (200) lattice spacing of 5.624 A for a 900 degrees C-annealed sample by transmission electron microscopy (TEM) analysis, it is verified that the segregation of Ge is responsible for the decreased hardness for the 1000 degrees C-annealed sample. (C) 2013 Elsevier B.V. All rights reserved.
Ultrahigh capacity 2 x 2 MIMO RoF system at 60 GHz employing single-sideband single-carrier modulation
(2014-03-15)
Lin, Chun-Ting
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Ho, Chun-Hung
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Huang, Hou-Tzu
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Cheng, Yu-Hsuan
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光電系統研究所
This article proposes and experimentally demonstrates a radio-over-fiber system employing single-sideband single-carrier (SSB-SC) modulation at 60 GHz. SSB-SC modulation has a lower peak-to-average-power ratio than orthogonal frequency division multiplex (OFDM) modulation; therefore, the SSB-SC signals provide superior nonlinear tolerance, compared to OFDM signals. Moreover, multiple-input multiple-output (MIMO) technology was used extensively to enhance spectral efficiency. A least-mean-square-based equalizer was implemented, including MIMO channel estimation, frequency response equalization, and I/Q imbalance compensation to recover the MIMO signals. Thus, using 2 x 2 MIMO technology and 64-QAM SSB-SC signals, we achieved the highest data rate of 84 Gbps with 12 bit/s/Hz spectral efficiency using the 7-GHz license-free band at 60 GHz. (C) 2014 Optical Society of America
Au nanoplates as robust, recyclable SERS substrates for ultrasensitive chemical sensing
(2014-03-15)
Lin, Wei-Hao
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Lu, Yi-Hsuan
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Hsu, Yung-Jung
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材料科學與工程學系
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Department of Materials Science and Engineering
With the structural advantages of being sharp and straight, Au nanoplates may work as a promising surface-enhanced Raman scattering (SERS) platform for detection of Raman-sensitive analytes. However, the utilization of Au nanoplates as realistic SERS substrates is still not widely investigated, especially in the practical detection of environmentally persistent pollutants. This work delivers the first successful demonstration of using Au nanoplate platform in practical SERS sensing toward a typical polycyclic aromatic hydrocarbons pollutant of pyrene. The samples were prepared using an environmentally benign seed-mediated growth approach without the post-purification treatment. It was found that Au nanoplates exhibited significantly enhanced SERS activities (enhancement factor = 7.30 x 10(7)) and achieved an extremely low detection limit (5 x 10(-10) M) toward pyrene molecules. Furthermore, the SERS activity of Au nanoplates can be fully recovered after repeatedly used and recycled in pyrene detection. These results manifest that the present Au nanoplates can serve as robust, recyclable SERS substrates that allow rapid detection of trace levels of analytes with a high degree of sensitivity and stability. The findings from this work may facilitate the use of Au nanoplate SERS substrates in more realistic applications such as biomolecule sensing and environmental monitoring. (C) 2013 Elsevier Inc. All rights reserved.
離家　一個人生活
(2014-03-16)
陳佩瑄
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Department of Communication and Technology
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傳播與科技學系
不知不覺中我已經過完我五分之一的人生。這二十一年有許多的愉快與不愉快，大部分的原因來自於我的家庭。
媽寶與寶媽　心靈無時差
(2014-03-16)
劉冠伶
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Department of Communication and Technology
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傳播與科技學系
我和媽媽，樂當媽寶與寶媽，現在還是像孩子一樣玩在一起，撒嬌可以繼續，但似乎是時候一起長大了。
動物安樂　多重差異
(2014-03-16)
蔡乙佳
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Department of Communication and Technology
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傳播與科技學系
長久以來，台灣政府都持續透過各種政策，加強流浪動物安置的待遇，並降低流浪動物的人道處理率。
靜態隨機存取記憶體
(2014-03-16)
莊景德
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楊皓義
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盧建宇
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陳建亨
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張琦昕
本發明揭露一種靜態隨機存取記憶體,其包含一預充裝置、一第一單元行陣列/周邊電路、及一第一漣波緩衝裝置。該預充裝置連接至一第一區域位元線,以對該第一區域位元線進行預充。該第一單元行陣列/周邊電路連接至該第一區域位元線,該第一單元行陣列/周邊電路具有多個單元以暫存資料,該多個單元連接至該第一區域位元線。該第一漣波緩衝裝置連接至該第一區域位元線及一第二區域位元線,該第一漣波緩衝裝置將該第一區域位元線的資料傳遞之該第二區域位元線。
就運動這檔事
(2014-03-16)
林庭宇
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Department of Communication and Technology
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傳播與科技學系
到現在的人生，也夠跟運動牽掛了，雖然沒有什麼偉大成就，但是運動這件事情或多或少也成為我生活的一部分。
高中籃球　淚水交織戰榮耀
(2014-03-16)
柯惠文
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Department of Communication and Technology
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傳播與科技學系
一○二學年度高中籃球聯賽順利落幕，在每個球員拼鬥背後，都有一個不為人知的故事。
從第一份工作學到的三堂課
(2014-03-16)
許仲廷
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Department of Communication and Technology
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傳播與科技學系
婚禮攝影是我的一份工作，也是很有趣的差事，讓我從中學到重要的三堂課。
喝酒不開車　酒測知多少
(2014-03-16)
韓惠宇
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Department of Communication and Technology
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傳播與科技學系
酒駕事故造成的死亡，年年居於交通事故的首位，開車不喝酒，應當是駕駛人所需遵守的一大要點。
可撓曲非揮發性記憶體及其製造方法
(2014-03-16)
劉柏村
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范揚順
一種可撓曲非揮發性記憶體之製造方法,包含:提供可撓曲基板;形成平坦層於可撓曲基板上;沉積金屬底電極層於平坦層上;形成光罩,以定義複數圖樣;對應圖樣沉積包含電性獨立之複數氧化鋁鋅錫電阻切換單元之氧化鋁鋅錫電阻切換層於該金屬底電極層上;以及對應氧化鋁鋅錫電阻切換單元沉積頂電極層於氧化鋁鋅錫電阻切換層上,俾形成複數非揮發性記憶體單元。
揮灑詩歌　耶穌也很POP
(2014-03-16)
張萬邦
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Department of Communication and Technology
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傳播與科技學系
基督教的詩歌創作隨著時代的變遷，正在慢慢地轉型。
鍵盤　敲出內心世界
(2014-03-16)
魏意蓁
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Department of Communication and Technology
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傳播與科技學系
游高晏，重度自閉症患者，透過打字與人溝通，並出版他的第一本書《我和地球人相處的日子》。
莫札特的虛實人生
(2014-03-16)
李孟東
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Department of Communication and Technology
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傳播與科技學系
一九八四年上映的經典電影【阿瑪迪斯】，內容描寫音樂史上著名的音樂神童，莫札特的故事。
鄉村風貌與財富的拉扯　
(2014-03-16)
陳韋琪
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Department of Communication and Technology
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傳播與科技學系
環境保護與能源開發該如何取得平衡？【心靈勇氣】道出了一個小鎮上的故事。