Browsing by Issue Date, starting with "2011-12-22"

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Quantum Chemistry Study on Internal Conversion of Diphenyldibenzofulvene in Solid Phase
(2011-12-22)
Li, Ming-Chung
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Hayashi, Michitoshi
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Lin, Sheng-Hsien
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應用化學系
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Department of Applied Chemistry
We investigate the nonradiative decay process of diphenyldibenzofulvene (DPDBF) in solid phase by using the quantum chemistry methods. To carry out the nonradiative rate constant calculation, we construct a solid phase model based on the ONIOM method. The geometry of the DPDBF molecule is optimized for the ground state by DFT and the first excited state by TD-DFT, and the corresponding vibrational frequencies and normal coordinates are computed. Under displaced-distorted harmonic oscillator potential approximation, Huang-Rhys factors are obtained. Vibronic coupling constants are calculated as a function of the normal mode based on Domcke's scheme. We find that vibronic coupling constants of 12 modes with large reorganization energies are of similar order, and if this result is still valid for other modes, the internal conversion rate would be determined by high frequency modes because they have a significant nuclear factor that is related to Franck-Condon overlap intergrals. We also find that geometrical changes are suppressed due to the stacking effect, which yields small Huang-Rhys values in the solid phase.
PLANAR ASYMMETRIC CROSSOVER COUPLER
(2011-12-22)
Kuo Jen-Tsai
;
Chiou Yi-Chyun
;
Chan Chi-Hung
A planar asymmetric crossover coupler has a first branch to a seventh branch. The first branch to the fourth branch form a first region having a first port and a fourth port. The fourth branch to the seventh branch form a second region having a second port and a third port. The characteristic impedance of each branch is determined according to the load impedance and power distribution ratio of each port.
Safrole-2 ',3 '-oxide induces cytotoxic and genotoxic effects in HepG2 cells and in mice
(2011-12-24)
Chiang, Su-yin
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Lee, Pei-yi
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Lai, Ming-tsung
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Shen, Li-ching
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Chung, Wen-sheng
Safrole-2',3'-oxide (SAFO) is a reactive electrophilic metabolite of the hepatocarcinogen safrole, the main component of sassafras oil. Safrole occurs naturally in a variety of spices and herbs, including the commonly used Chinese medicine Xi xin (Asari Radix et Rhizoma) and Dong quai (Angelica sinensis). SAFO is the most mutagenic metabolite of safrole tested in the Ames test. However, little or no data are available on the genotoxicity of SAFO in mammalian systems. In this study, we investigated the cytotoxicity and genotoxicity of SAFO in human HepG2 cells and male FVB mice. Using MTT assay. SAFO exhibited a dose-and time-dependent cytotoxic effect in HepG2 cells with TC(50) values of 361.9 mu M and 193.2 mu M after 24 and 48 h exposure. respectively. In addition, treatment with SAFO at doses of 125 mu M and higher for 24 h in HepG2 cells resulted in a 5.1-79.6-fold increase in mean Comet tail moment by the alkaline Comet assay and a 2.6-7.8-fold increase in the frequency of micronucleated binucleated cells by the cytokinesis-block micronucleus assay. Furthermore, repeated intraperitoneal administration of SAFO (15, 30, 45, and 60 mg/kg) to mice every other day for a total of twelve doses caused a significant dose-dependent increase in mean Comet tail moment in peripheral blood leukocytes (13.3-43.4-fold) and in the frequency of micronucleated reticulocytes (1.5-5.8-fold). Repeated administration of SAFO (60 mg/kg) to mice caused liver lesions manifested as a rim of ballooning degeneration of hepatocytes immediately surrounding the central vein. Our data clearly demonstrate that SAFO significantly induced cytotoxicity. DNA strand breaks. micronuclei formation both in human cells in vitro and in mice. More studies are needed to explore the role SAFO plays in safrole-induced genotoxicity. (C) 2011 Elsevier B.V. All rights reserved.
選戰逼近　旗幟滿天飛
(2011-12-25)
王俐文
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Department of Communication and Technology
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傳播與科技學系
每逢選舉，台灣的街景便「百家爭鳴」，四處都是候選人的旗幟和肖像。走在路上，一不小心就會踩中候選人的臉；上廁所時丟衛生紙，就又看到候選人的面孔躺在垃圾桶裡；開車騎車時，沿街的旗幟在身旁隨風狂舞，令人捏一把冷汗。
士林市場搬遷　吸客或阻客
(2011-12-25)
林冠儀
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Department of Communication and Technology
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傳播與科技學系
隨著士林市場改建工程完工，美食小吃雲集的士林臨時市場最近搬遷，陪伴台北人走過九年歲月的士林臨時市場，即將在12月25日吹熄燈號，而士林市場美食攤位地下化到底是好是壞，也引起不少討論。
來自邊陲的教育
(2011-12-25)
陳奕儒
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Department of Communication and Technology
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傳播與科技學系
在彰化高中圖書館裡，二三十個學生坐在位置上，聆聽一個學生發表自己的意見。他們即將代表彰化高中到日本做親善大使，由於機會難得每個學生都盡可能陳述想法。一個神情略帶疲倦的中年人，靠在書架上滿足的看著討論紛紛的現場。他是整個活動的發起人，也是這個高中圖書館的主任 – 呂興忠。
人潮背後
(2011-12-25)
胡哲揚
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Department of Communication and Technology
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傳播與科技學系
內灣，新竹的歷史與新商圈結合之處。每到假日，人潮洶湧。但是，光明背後總有著黑暗。
總編輯的話
(2011-12-25)
楊廣培
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Department of Communication and Technology
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傳播與科技學系
這兩天天氣突然轉冷，假如偶然想宅在電腦前面，我們喀報也是可以成為大家的眼睛，幫讀者們探索這個世界，以及它的人與事。本期的２5篇文章絕對可以擴大讀者的視野，其中關於人物和社會議題的報導各佔5篇和６篇之多，以圖片為主題的也佔據了6個位子。喀報的文章內容讓大家不出門也知天下事。
領對票　選對人
(2011-12-25)
賴映秀
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Department of Communication and Technology
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傳播與科技學系
民國101年元月14日將舉辦第十三屆總統副總統暨第八屆立委選舉，立委選舉採單一選區兩票制，每個投票人將同時領有三張選票，領對票才不會浪費自己寶貴的一票。
自然率真魏如萱
(2011-12-25)
林彥伶
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Department of Communication and Technology
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傳播與科技學系
不按理出牌，不管是聲音或音樂總是變幻莫測讓樂迷難以掌握，這就是「魏如萱」的音樂風格。新時代的獨立歌手魏如萱就像是魔術師，不斷地帶來音樂的驚喜，新專輯《不允許哭泣的場合》又再次帶給樂迷全新的精采。
那些年一起瘋狂的女孩
(2011-12-25)
許鈺煊
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Department of Communication and Technology
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傳播與科技學系
一群女孩，很傻很瘋，永遠用最真的一切寫下自己的青春。我很懷念，那些無所忌憚的日子；也很感謝，那些日子的笑與淚，堆疊成現在的自己。
歐洲　邂逅之後
(2011-12-25)
王升含
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Department of Communication and Technology
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傳播與科技學系
對、對、對，歐洲很美。但優雅精緻的背後暗含的歷史糾結和文化脈絡，得透過樸實、深沉的對話方可滲透。「哇！好美麗喔～」之後，到底蘊藏哪些元素，使歐羅巴成為今日另許多人又愛又恨的她？
新電腦時代
(2011-12-25)
李彥璋
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Department of Communication and Technology
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傳播與科技學系
數位時代的來臨，科技產業蓬勃發展，自電腦發明至今後，電腦、手機等３Ｃ產品已是一般大眾的必備品，如今平板電腦的誕生將在科技產業裡造成相當大的衝擊，證明後電腦時代即將來臨。
邱瑞鵬　肯定自我
(2011-12-25)
吳孟芯
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Department of Communication and Technology
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傳播與科技學系
「縱使有再大的事情，人都要樂觀。」肯定地說出自己一直以來堅持的信念，邱瑞鵬晶亮的大眼裡充滿自信，舉手投足之間充滿生氣，令人難以想像他其實曾罹患小兒麻痺，甚至因此影響行走。
璞玉計畫　土地正義之爭
(2011-12-25)
林儀
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Department of Communication and Technology
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傳播與科技學系
2011年12月13日晚間，立法院三讀通過《土地徵收條例修正草案》。台灣農村陣線在凱達格蘭大道上發起靜坐抗爭運動的支持者們，頓時情緒沸騰。這個法案的修改在農運分子與政府官方之間，掀起了一波對於「土地正義」的論辯。而竹北正在進行中的璞玉計畫，往後的發展關鍵，也與此息息相關。
Mechanical and tribological properties evaluation of cathodic arc deposited CrN/ZrN multilayer coatings
(2011-12-25)
Huang, Sung-Hsiu
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Chen, Siao-Fan
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Kuo, Yu-Chu
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Wang, Chaur-Jeng
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Lee, Jyh-Wei
Five nanostructured CrN/ZrN multilayer coatings were deposited periodically by cathodic arc evaporation. The bilayer periods of the CrN/ZrN multilayer coatings were controlled in the range of 5 to 30 nm. The structures and bilayer period of the multilayer coatings were characterized by an X-ray diffractometer. The microstructures of thin films were examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. Nanoindentation, scratch tests, Daimler-Benz Rockwell-C (HRC-DB) adhesion tests, microhardness and pin-on-disk wear tests were used to evaluate the hardness, adhesion, indentation toughness and tribological properties of thin films, respectively. It was found that the hardness and tribological properties were strongly influenced by the bilayer period of the CrN/ZrN multilayer coatings. An optimal combination of mechanical properties and excellent tribological behavior was found for a coating with a critical bilayer period of 30 nm. (C) 2011 Elsevier B.V. All rights reserved.
傅榆　用影像透視真實
(2011-12-25)
楊佳靜
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Department of Communication and Technology
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傳播與科技學系
長頭髮、大眼睛，說起話來慢條斯里、給人感覺文靜內斂的傅榆，是個七年級的女性紀錄片導演，至今已經拍攝過數個紀錄短片。一談論起自己與喜愛的紀錄片，就能發現，她對社會一直抱持敏銳的觀察力和種種質疑，常常看見別人不容易看見的地方。
死亡關頭繞一圈　重返
(2011-12-25)
韓捷
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Department of Communication and Technology
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傳播與科技學系
在生命的過程中，總會有些另人意想不到的事情，不管這件事是好是壞，都會對我們產生不小的影響。對於即將要畢業的人來說，開除學籍是一件相當痛苦的事，但是對我來說，某方面又好像幫我解脫了身上沉重的枷鎖。
自給率下降　糧食危機浮現
(2011-12-25)
張莉雯
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Department of Communication and Technology
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傳播與科技學系
台灣糧食自給率一年比一年低，仰賴國外進口糧食以供應國民的每日三餐，隨著糧食貿易市場波動，人們盤中飧的價格也會隨之起舞，相當於把國民的生命交給他國掌控。如若發生天災人禍，還可能面臨糧食不足的困境。
看不見的殺手　懸浮微粒
(2011-12-25)
鄭巧琪
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Department of Communication and Technology
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傳播與科技學系
世界衛生組織（who）於26日公布全球空氣調查報告，在38個國家、565個城市中的懸浮微粒（PM2.5）濃度，台灣排名第32名、倒數第六，台北則是第551名。