Browsing by Issue Date, starting with "2016-10-07"

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Three Component Divergent Reactions: Base-Controlled Amphiphilic Synthesis of Benzimidazole-Linked Thiazetidines and Fused Thiadiazines
(2016-10-07)
Selvaraju, Manikandan
;
Dhole, Sandip
;
Sun, Chung-Ming
;
應用化學系
;
Department of Applied Chemistry
A divergent reaction of 2-aminobenzimidazole with isothiocyanates and dihalomethanes has been developed for the selective synthesis of benzoimidazothiazetidine and benzoimidazothiadiazine. A single-pot reaction of 2-aminobenzimidazole in the presence of sodium hydride delivers benzoimidazothiazetidine, whereas triethylamine promotes the formation of benzoimidazothiadiazine via a sequential stepwise, fashion. The reaction sequence involves the initial formation of thiourea followed by regioselective nucleophilic addition and intramolecular ring-closing with dihalo electrophiles. The observed regioselectivity,of this reaction is governed by the nature of bases and the reaction sequence.
Thermal and Thermoelectric Transport in Highly Resistive Single Sb2Se3 Nanowires and Nanowire Bundles
(2016-10-07)
Ko, Ting-Yu
;
Shellaiah, Muthaiah
;
Sun, Kien Wen
;
應用化學系
;
電子工程學系及電子研究所
In this study, we measured the thermal conductivity and Seebeck coefficient of single Sb2Se3 nanowires and nanowire bundles with a high resistivity (sigma similar to 4.37 x 10(-4) S/m). Microdevices consisting of two adjacent suspended silicon nitride membranes were fabricated to measure the thermal transport properties of the nanowires in vacuum. Single Sb2Se3 nanowires with different diameters and nanowire bundles were carefully placed on the device to bridge the two membranes. The relationship of temperature difference on each heating/sensing suspension membranes with joule heating was accurately determined. A single Sb2Se3 nanowire with a diameter of similar to 680 nm was found to have a thermal conductivity (k(NW)) of 0.037 +/- 0.002 W/m.K. The thermal conductivity of the nanowires is more than an order of magnitude lower than that of bulk materials (k similar to 0.36-1.9 W/m.K) and highly conductive (sigma similar to 3 x 10(4) S/m) Sb2Se3 single nanowires (k similar to 1 W/m.K). The measured Seebeck coefficient with a positive value of similar to 661 mu V/K is comparable to that of highly conductive Sb2Se3 single nanowires (similar to 750 mu V/K). The thermal transport between wires with different diameters and nanowire bundles was compared and discussed.
Infrared absorption of 1-chloro-2-methyl-2-propyl [C-center dot(CH3)(2)CH2Cl] and 2-chloro-2-methylpropyl] [(CH2C)-C-center dot(CH3)(2)Cl] radicals produced in the addition reactions of Cl with isobutene (i-C4H8) in solid para-hydrogen
(2016-10-07)
Chou, Ching-Yin
;
Lee, Yuan-Pern
;
應用化學系
;
應用化學系分子科學碩博班
;
Department of Applied Chemistry
The addition reactions of chlorine atom with isobutene (i-C4H8) in solid para-hydrogen (p-H-2) were investigated with infrared (IR) absorption spectra. When a p-H-2 matrix containing Cl-2 and isobutene was irradiated with ultraviolet light at 365 nm, intense lines in a set at 534.5, 1001.0, 1212.9, 1366.0, 2961.6, and 2934.7 cm(-1), and several weaker others due to the 1-chloro-2-methyl-2-propyl radical, C-center dot(CH3)(2)CH2Cl, and those in a second set including intense ones at 642.7, 799.2, 1098.2, 1371.8, and 3027.3 cm(-1) due to the 2-chloro-2-methylpropyl radical, (CH2C)-C-center dot(CH3)(2)Cl, appeared; the ratio of C-center dot(CH3)(2)CH2Cl to (CH2C)-C-center dot(CH3)(2)Cl was approximately (3 +/- 1):1. The observed wavenumbers and relative intensities agree with the vibrational wavenumbers and IR intensities predicted with the B3PW91/aug-cc-pVTZ method. That the Cl atom adds to both carbons of the C=C bond of isobutene with the terminal site slightly favored is consistent with the energies of products predicted theoretically, but is in contrast to the reaction of Cl + propene in solid p-H-2 in which the addition of Cl to mainly the central C atom was previously reported. The role of the p-H-2 matrix in affecting the reaction paths is discussed. Absorption lines of the complex i-C4H8 center dot Cl-2 and the dichloro-product anti-1,2-dichloro-2-methylpropane, a-CH2ClCCl(CH3)(2), are also characterized. Published by AIP Publishing.
Improved Search for a Light Sterile Neutrino with the Full Configuration of the Daya Bay Experiment
(2016-10-07)
An, F. P.
;
Balantekin, A. B.
;
Band, H. R.
;
Bishai, M.
;
Blyth, S.
This Letter reports an improved search for light sterile neutrino mixing in the electron antineutrino disappearance channel with the full configuration of the Daya Bay Reactor Neutrino Experiment. With an additional 404 days of data collected in eight antineutrino detectors, this search benefits from 3.6 times the statistics available to the previous publication, as well as from improvements in energy calibration and background reduction. A relative comparison of the rate and energy spectrum of reactor antineutrinos in the three experimental halls yields no evidence of sterile neutrino mixing in the 2 x 10(-4) less than or similar to vertical bar Delta m(41)(2)vertical bar less than or similar to 0.3 eV(2) mass range. The resulting limits on sin(2) 2 theta(14) are improved by approx imately a factor of 2 over previous results and constitute the most stringent constraints to date in the vertical bar Delta m(41)(2)vertical bar less than or similar to 0.2 eV(2) region.
Limits on Active to Sterile Neutrino Oscillations from Disappearance Searches in the MINOS, Daya Bay, and Bugey-3 Experiments
(2016-10-07)
Adamson, P.
;
An, F. P.
;
Anghel, I.
;
Aurisano, A.
;
Balantekin, A. B.
Searches for a light sterile neutrino have been performed independently by the MINOS and the Daya Bay experiments using the muon (anti) neutrino and electron antineutrino disappearance channels, respectively. In this Letter, results from both experiments are combined with those from the Bugey-3 reactor neutrino experiment to constrain oscillations into light sterile neutrinos. The three experiments are sensitive to complementary regions of parameter space, enabling the combined analysis to probe regions allowed by the Liquid Scintillator Neutrino Detector (LSND) and MiniBooNE experiments in a minimally extended four-neutrino flavor framework. Stringent limits on sin(2) 2 theta(mu e) are set over 6 orders of magnitude in the sterile mass-squared splitting Delta m(41)(2). The sterile-neutrino mixing phase space allowed by the LSND and MiniBooNE experiments is excluded for Delta m(41)(2) < 0.8 eV(2) at 95% CLs.
幽默人生　插畫家馬克
(2016-10-09)
何肇耕
;
Department of Communication and Technology
;
傳播與科技學系
上班忙碌加班苦、人生憑依何處靠？用詼諧畫筆演繹著世間百態的插畫家故事！
音樂不夜　夢想不滅
(2016-10-09)
凃易暄
;
Department of Communication and Technology
;
傳播與科技學系
臺裔美籍的網路歌手Jason Chen，擁有一副簡單純粹的好歌喉，以獨特的中翻英模式翻唱華語歌曲，吸引大批亞洲紛絲關注。秉持著Music Never Sleeps的精神，持續在音樂這條路上琢磨。
智慧型眼罩　調整睡眠問題
(2016-10-09)
郭宜婷
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Department of Communication and Technology
;
傳播與科技學系
介紹睡眠相關科技產品，以及結合穿戴式科技的助眠技術。
電競颳風　台灣蓄勢待起飛
(2016-10-09)
范瑀真
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Department of Communication and Technology
;
傳播與科技學系
時逢英雄聯盟S6全球總決賽台灣表現不俗，剖析台灣電競產業。
丟出寶貝球　抓住親子關係
(2016-10-09)
張巧宜
;
Department of Communication and Technology
;
傳播與科技學系
全球瘋寶可夢，遊戲一上市對社會帶來許多影響，有些家庭藉此重新找回家庭互動。
拍照打卡　是桎梏還是自由
(2016-10-09)
張芸瑄
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Department of Communication and Technology
;
傳播與科技學系
拍照打卡已是現代社會趨勢，人們是善用它還是被它控制著。
日出之時　生活此刻
(2016-10-09)
王羽廷
;
Department of Communication and Technology
;
傳播與科技學系
日出，等。但結果卻不一定是預料中的。
牙刷小日常　轉動物聯網
(2016-10-09)
林宥成
;
Department of Communication and Technology
;
傳播與科技學系
以日常牙刷結合現今當紅的物聯網，看其產生的效益與疑慮。
親子同樂　戳破你的泡泡
(2016-10-09)
陳昱彣
;
彭書耘
;
Department of Communication and Technology
;
傳播與科技學系
十月八日到十日在臺北花博公園舉辦的市集活動「戳破你的泡泡」以泡泡為主題，吸引大小朋友一同參加。
自造者運動　重視實作價值
(2016-10-09)
林芃蕙
;
Department of Communication and Technology
;
傳播與科技學系
透過自造者博覽會了解近期科技發展走向，以及自造者文化帶來的影響。
追求美食　咀嚼心理滋味
(2016-10-09)
韓舒容
;
Department of Communication and Technology
;
傳播與科技學系
現代人瘋美食的現象相當嚴重，藉此去探討享受美食的背後，究竟深受哪些心理意義的影響。
總編輯的話
(2016-10-09)
鄧涵文
;
Department of Communication and Technology
;
傳播與科技學系
本期喀報第兩百四十七期，共二十二篇稿件。包含藝文評論一篇、文化現象五篇、科技新知五篇、人物特寫三篇、照片故事兩篇、自由創作五篇及影音新聞一篇，側欄廣告為「2016哈客流行列車音樂會」。
女人走味
(2016-10-09)
何書馨
;
Department of Communication and Technology
;
傳播與科技學系
氣味創作詩。本次創作以家庭主婦為構想，描寫女人走入家庭後，外在與靈魂的改變。
3.5mm耳機孔　續存或淘汰
(2016-10-09)
李瑞彥
;
Department of Communication and Technology
;
傳播與科技學系
從蘋果（Apple）iPhone 7取消3.5mm耳機接孔來看產業以及市場的變化。
記憶書籤
(2016-10-09)
鄭懿君
;
Department of Communication and Technology
;
傳播與科技學系
在歲月的流沙中，那一個個陌生又含糊的名字。