Browsing by Issue Date, starting with "2015-08-07"

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Novel transport function of adherens junction revealed by live imaging in Drosophila
(2015-08-07)
Li, Yu-Chiao
;
Yang, Wen-Ting
;
Cheng, Lien-Chieh
;
Lin, Chiao-Ming
;
Ho, Yu-Huei
Adherens junctions are known for their role in mediating cell cell adhesion. DE-cadherin and Echinoid are the principle adhesion molecules of adherens junctions in Drosophila epithelia. Here, using live imaging to trace the movement of endocytosed Echinoid vesicles in the epithelial cells of Drosophila embryos, we demonstrate that Echinoid vesicles co-localize and move with Rab5-or Rab11-positive endosomes. Surprisingly, these Echinoid-containing endosomes undergo directional cell-to-cell movement, through adherens junctions. Consistent with this, cell-to-cell movement of Echinoid vesicles requires the presence of DE-cadherin at adherens junctions. Live imaging further revealed that Echinoid vesicles move along adherens junction-associated microtubules into adjacent cells, a process requiring a kinesin motor. Importantly, DE-cadherin- and EGFR-containing vesicles also exhibit intercellular movement. Together, our results unveil a transport function of adherens junctions. Furthermore, this adherens junctions-based intercellular transport provides a platform for the exchange of junctional proteins and signaling receptors between neighboring cells. (C) 2015 Elsevier Inc. All rights reserved.
Experiencing affective music in eyes-closed and eyes-open states: an electroencephalography study
(2015-08-07)
Chang, Yun-Hsuan
;
Lee, You-Yun
;
Liang, Keng-Chen
;
Chen, I-Ping
;
Tsai, Chen-Gia
In real life, listening to music may be associated with an eyes-closed or eyes-open state. The effect of eye state on listeners' reaction to music has attracted some attention, but its influence on brain activity has not been fully investigated. The present study aimed to evaluate the electroencephalographic (EEG) markers for the emotional valence of music in different eye states. Thirty participants listened to musical excerpts with different emotional content in the eyes-closed and eyes-open states. The results showed that participants rated the music as more pleasant or with more positive valence under an eyes-open state. In addition, we found that the alpha asymmetry indices calculated on the parietal and temporal sites reflected emotion valence in the eyes-closed and eyes-open states, respectively. The theta power in the frontal area significantly increased while listening to emotional-positive music compared to emotional-negative music under the eyes-closed condition. These effects of eye states on EEG markers are discussed in terms of brain mechanisms underlying attention and emotion.
Electronic quenching of O(D-1) by Xe: Oscillations in the product angular distribution and their dependence on collision energy
(2015-08-07)
Garofalo, Lauren A.
;
Smith, Mica C.
;
Dagdigian, Paul J.
;
Klos, Jacek
;
Alexander, Millard H.
The dynamics of the O(D-1) + Xe electronic quenching reaction was investigated in a crossed beam experiment at four collision energies. Marked large-scale oscillations in the differential cross sections were observed for the inelastic scattering products, O(P-3) and Xe. The shape and relative phases of the oscillatory structure depend strongly on collision energy. Comparison of the experimental results with time-independent scattering calculations shows qualitatively that this behavior is caused by Stueckelberg interferences, for which the quantum phases of the multiple reaction pathways accessible during electronic quenching constructively and destructively interfere. (C) 2015 AIP Publishing LLC.
Switchable viewing angle display with a compact directional backlight and striped diffuser
(2015-08-10)
Wang, Yi-Jun
;
Lu, Jian-Gang
;
Chao, Wei-Chung
;
Shieh, Han-Ping D.
;
光電工程學系
A compact high-directionality backlight module combined with a striped diffuser is proposed to achieve an adjustable viewing angle for ecodisplay. The micro-prisms on the compact light guide plate guide the emitting rays to the normal viewing angle, whereas a set of striped diffusers scatter the rays to a wide viewing angle. View cones of +/- 10 degrees/+/- 55 degrees were obtained for narrow/wide viewing modes with 88%/85% uniformity of spatial luminance, respectively. Compared with the conventional backlight, the optical efficiencies were increased by factors of 1.47 and 1.38 in narrow and wide viewing modes, respectively. In addition, only 5% of power consumption was needed when the backlight worked in private narrow viewing mode to maintain the same luminance as that of a conventional backlight. (C) 2015 Optical Society of America
Multi-indexed extensions of soliton potential and extended integer solitons of KdV equation
(2015-08-10)
Ho, Choon-Lin
;
Lee, Jen-Chi
;
電子物理學系
;
Department of Electrophysics
We calculate infinite set of initial profiles of higher integer Korteweg-de Vries (KdV) solitons, which are both exactly solvable for the Schrodinger equation and for the Gel\'fand-Levitan-Marchenko (GLM) equation in the inverse scattering transform (IST) method of KdV equation. The calculation of these higher integer soliton solutions is based on the recently developed multi-indexed extensions of the reflectionless soliton potential.
Size-dependent line broadening in the emission spectra of single GaAs quantum dots: Impact of surface charge on spectral diffusion
(2015-08-10)
Ha, Neul
;
Mano, Takaaki
;
Chou, Ying-Lin
;
Wu, Yu-Nien
;
Cheng, Shun-Jen
Making use of droplet epitaxy, we systematically controlled the height of self-assembled GaAs quantum dots by more than one order of magnitude. The photoluminescence spectra of single quantum dots revealed the strong dependence of the spectral linewidth on the dot height. Tall dots with a height of similar to 30 nm showed broad spectral peaks with an average width as large as similar to 5 meV, but shallow dots with a height of similar to 2 nm showed resolution-limited spectral lines (<= 120 mu eV). The measured height dependence of the linewidths is in good agreement with Stark coefficients calculated for the experimental shape variation. We attribute the microscopic source of fluctuating electric fields to the random motion of surface charges at the vacuum-semiconductor interface. Our results offer guidelines for creating frequency-locked photon sources, which will serve as key devices for long-distance quantum key distribution.
Nanocontact Disorder in Nanoelectronics for Modulation of Light and Gas Sensitivities
(2015-08-11)
Lin, Yen-Fu
;
Chang, Chia-Hung
;
Hung, Tsu-Chang
;
Jian, Wen-Bin
;
Tsukagoshi, Kazuhito
To fabricate reliable nanoelectronics, whether by top-down or bottom-up processes, it is necessary to study the electrical properties of nanocontacts. The effect of nanocontact disorder on device properties has been discussed but not quantitatively studied. Here, by carefully analyzing the temperature dependence of device electrical characteristics and by inspecting them with a microscope, we investigated the Schottky contact and Mott's variable-range-hopping resistances connected in parallel in the nanocontact. To interpret these parallel resistances, we proposed a model of Ti/TiOx in the interface between the metal electrodes and nanowires. The hopping resistance as well as the nanocontact disorder dominated the total device resistance for high-resistance devices, especially at low temperatures. Furthermore, we introduced nanocontact disorder to modulate the light and gas responsivities of the device; unexpectedly, it multiplied the sensitivities compared with the intrinsic sensitivity of the nanowires. Our results improve the collective understanding of electrical contacts to low-dimensional semiconductor devices and will aid performance optimization in future nanoelectronics.
雙階排程方法、電腦程式產品
(2015-08-11)
林盈達
;
蔡明俊
;
王志強
;
賴源正
一種雙階排程方法，用於一電腦以排程多個專案，其中一排程規劃包括該些專案中的一第一專案，該第一專案包括第一工作，該雙階排程方法包括：根據該第一專案的一運轉時間、該第一專案的一離開時間、該第一工作的一服務時間、與一鬆弛因子來計算該第一工作的最晚開始時間；取得該些專案中的一第二專案，其中該第二專案包括多個第二工作；對於每一該些第二工作，取得至少一回填時間；對於每一該些第二工作，從對應的該至少一回填時間中挑選一第一回填時間，使得被延遲的該第一工作的該最晚開始時間大於等於該第一工作的一開始時間；以及將每一該些第二工作在對應的該第一回填時間加入至該排程規劃。
單脈衝雷達的比較器及其訊號產生方法
(2015-08-11)
黃瑞彬
;
郭芳銚
一種單脈衝雷達的比較器，包括：一天線陣列，包括N個天線，其中N為大於1的整數；一橫向電磁波模態空腔(TEM mode cavity)功率合成器，具有一合成埠與M個輸入埠組合，各該輸入埠組合具有一正相輸入埠與一反相輸入埠，其中M為大於1的整數；以及一切換裝置，耦接於該天線陣列與該橫向電磁波模態空腔功率合成器之間，用以將各該天線接收的回波訊號傳送至該些輸入埠組合的其中之一的該正相輸入埠或該反相輸入埠，其中，該橫向電磁波模態空腔功率合成器的該合成埠依據該些輸入埠組合各自的該正相輸入埠或該反相輸入埠所接收的該回波訊號產生一輸出訊號。
差量調變裝置
(2015-08-11)
吳重雨
;
呂元復
一種差量調變裝置，其用以接收一類比訊號，該類比訊號係為一多通道訊號，該類比訊號經由一多工器作為一通道訊號之選取，至少包含：一減法運算器，用以相減一輸出位元碼與一類比輸入訊號以產生一差值訊號；一第一類比數位轉換器，用以找出該差值訊號所落在之範圍內，其中該第一類比數位轉換器為一粗略估算類比數位轉換器，其用以估算該差值訊號之範圍，且設定多種範圍，以不改變，或改變一量化誤差以避免該訊號差值過大；一第二類比數位轉換器，用以根據第一類比數位轉換器之結果，以動態調整一量化步階大小，以量化該差值訊號，其中該第二類比數位轉換器為一精準解析類比數位轉換器，其係以二進位收尋方法，精準解析一差值電壓至最小位元，或使用者定義之最小單位為止；一記憶體單元，其中該記憶體單元為多通道記憶體；以及一數位加法器，用以累加該記憶體單元之一輸出位元碼，以及一數位輸出碼；其中，該減法運算單元與該粗略估算類比數位轉換器與該精準解析類比數位轉換器共同使用相同的二進制加權電容陣列，該數位加法器係輸出累加結果，並存入該記憶體單元，該第二類比數位轉換器係根據該第一類比數位轉換器之結果動態調整量化步階大小，以對該差值訊號作量化。
製造有機電子元件的裝置及其方法
(2015-08-11)
孟心飛
;
林皓武
;
洪勝富
;
冉曉雯
;
張浩文
一種製造一有機電子元件的方法，包含下列步驟：提供一基板；提供一第一熱源以加熱該基板；配置該有機電子元件的一膜材於該基板上；提供一第二熱源以加熱該膜材以形成一第一載子傳輸層；將含有一金屬離子之一材料摻雜於一有機材料中，並將其均勻地混合以形成一有機溶液；以及藉由具有複數微縫隙的一刮刀將該有機溶液塗佈，並且滾動或滑動該刮刀而使該有機溶液塗佈在該第一載子傳輸層上，以形成一第二載子傳輸層，其中該第二載子傳輸層為一電子傳輸層，且該第二載子傳輸層包含該有機材料與該金屬離子之材料。
訊息通知圖形介面之顯示方法、裝置以及電腦可讀取儲存裝置
(2015-08-11)
許騰尹
;
賴煒棋
一種訊息通知圖形介面之顯示方法，應用於一行動電子裝置，包括：經該行動電子裝置之一數據處理單元解析一或多筆訊息通知，取得各筆訊息通知的內容、格式以及關聯的一軟體程式，以及進一步取得各訊息通知供預覽的格式，包括圖形、文字、影音內容或其任一組合；該數據處理單元啟始一訊息通知圖形介面，根據該訊息通知的數量、格式以及所關聯的軟體程式編排顯示於該訊息通知圖形介面的內容；其中於編排顯示於該訊息通知圖形介面的內容步驟中，係依照該訊息通知圖形介面的可顯示區域大小、長寬比、接收訊息的前後順序顯示各筆訊息通知供預覽的圖形、文字、影音內容或其任一組合；以及顯示該訊息通知圖形介面於該行動電子裝置之一顯示螢幕上，其中顯示的各筆訊息通知設有該筆訊息通知所關聯的軟體程式的連結；其中該訊息通知圖形介面之一頁內所呈現的各筆訊息通知各佔據一個區域，各區域的大小依照各筆訊息通知的格式調整，且各筆訊息通知所顯示供預覽的內容依照所佔據的區域大小與長寬比調整所顯示內容的文字多寡與圖形大小；其中，該一或多筆訊息通知於該行動電子裝置接收後先暫存於該行動電子裝置的一訊息中心中，當該訊息中心又接收新的訊息通知，即時執行所述的解析該筆訊息通知，以及根據該筆訊息通知的格式與關聯軟體程式即時依照該訊息通知圖形介面的可顯示區域大小、長寬比、接收訊息的前後順序編排顯示於該訊息通知圖形介面的內容；以及，各區域大小與長寬比根據各筆訊息內容的屬性而調整。
一維鈦金屬奈米結構及其製造方法
(2015-08-11)
陳澤龍
;
裘性天
;
李紫原
一種一維鈦金屬奈米結構之製造方法，其步驟包含：將一耐溫基材與一鈦金屬(Ti)置入一化學氣相沉積反應爐中；及利用一載流氣體將一四氯化鈦(TiCl4 )帶入該化學氣相沉積反應爐和該鈦金屬進行反應，且反應溫度為300~900℃，沉積溫度為200~850℃，該載流氣體之流量為0.1~50sccm，反應時間為5~60小時，使該四氯化鈦與該鈦金屬反應為一亞氯化鈦，再經由熱裂解而生成一一維鈦金屬奈米結構於該耐溫基材上。
Reflective Displays Based on Dye-Doped Bistable Chiral-Tilted Homeotropic Nematics
(2015-08-13)
Huang, Kuan-Chung
;
Lee, Yun-Han
;
Lee, Wei
;
影像與生醫光電研究所
;
Institute of Imaging and Biomedical Photonics
Dielectric and Electro-Optical Properties of Polymer-Stabilized-Blue-Phase Cells
(2015-08-13)
Hsu, Hsuan-Tsung
;
Wu, Po-Chang
;
Lee, Wei
;
光電學院
;
影像與生醫光電研究所
YKL-40 regulated epithelial-mesenchymal transition and migration/invasion enhancement in non-small cell lung cancer
(2015-08-15)
Jefri, Malvin
;
Huang, Yi-Ning
;
Huang, Wen-Chien
;
Tai, Chun-San
;
Chen, Wen-Liang
Background: YKL-40 is a secreted inflammatory protein that its overexpression has been reported to correlate with poor outcome of various malignant diseases, especially in cancer. However, the function of this protein is still unclear. Methods: The clinical prognosis of non-small cell lung cancers (NSCLC) patients and their clinical YKL-40 expressions were obtained from the Prognoscan database. The expressions of YKL-40 in patient samples were determined by Western Blotting assay. YKL-40 gene knockdown and overexpression were performed on NSCLC cancer cells (CL1-1 and CL1-5). The cells were investigated for their epithelial-mesenchymal transition (EMT) markers gene modulation through Western Blotting and RT-PCR. Further cell metastatic abilities were assessed by transwell migration and invasion assay. Result: In this study, YKL-40 was observed to be highly expressed in NSCLC specimens. Furthermore, determined by the PrognoScan database analysis, patients with high expression levels of YKL-40 were found with poor prognosis. In the in vitro study, different characteristics of NSCLC cell lines (CL1-1, H23, H838, CL1-5, and H2009) were used as study models, where YKL-40 expression levels were determined to correlate with the phenotypic characteristics of cancer metastasis. In this study, YKL-40 was demonstrated to regulate EMT marker expressions such as Twist, Snail, Slug, N-cadherin, Vimentin, and E-cadherin. The protein's affects in cancer cell migration and invasion were also observed in YKL-40 overexpression or knock down NSCLC cell lines. Conclusion: All of results from this study suggest that YKL-40 is a major factor in NSCLC metastasis. Thus, YKL-40 may serve as therapeutic target for NSCLC patients in the future.
Method to evaluate afterpulsing probability in single-photon avalanche diodes
(2015-08-15)
Tzou, Bo-Wei
;
Wu, Jau-Yang
;
Lee, Yi-Shan
;
Lin, Sheng-Di
;
電機工程學系
We propose and demonstrate a new method for evaluating the afterpulsing effect in single-photon avalanche photodiodes (SPADs). By analyzing the statistical property of dark count rate, we can quantitatively characterize afterpulsing probability (APP) of a SPAD. In experiment, the temperature-dependent low dark count rate (DCR) distribution becomes non-Poissonian at lower temperature and has higher excess bias as the afterpulsing effect becomes significant. Our work provides a flexible way to examine APP in either single-device or circuit level. (C) 2015 Optical Society of America
YKL-40 regulated epithelial-mesenchymal transition and migration/invasion enhancement in non-small cell lung cancer
(2015-08-15)
Jefri, Malvin
;
Huang, Yi-Ning
;
Huang, Wen-Chien
;
Tai, Chun-San
;
Chen, Wen-Liang
Background: YKL-40 is a secreted inflammatory protein that its overexpression has been reported to correlate with poor outcome of various malignant diseases, especially in cancer. However, the function of this protein is still unclear. Methods: The clinical prognosis of non-small cell lung cancers (NSCLC) patients and their clinical YKL-40 expressions were obtained from the Prognoscan database. The expressions of YKL-40 in patient samples were determined by Western Blotting assay. YKL-40 gene knockdown and overexpression were performed on NSCLC cancer cells (CL1-1 and CL1-5). The cells were investigated for their epithelial-mesenchymal transition (EMT) markers gene modulation through Western Blotting and RT-PCR. Further cell metastatic abilities were assessed by transwell migration and invasion assay. Result: In this study, YKL-40 was observed to be highly expressed in NSCLC specimens. Furthermore, determined by the PrognoScan database analysis, patients with high expression levels of YKL-40 were found with poor prognosis. In the in vitro study, different characteristics of NSCLC cell lines (CL1-1, H23, H838, CL1-5, and H2009) were used as study models, where YKL-40 expression levels were determined to correlate with the phenotypic characteristics of cancer metastasis. In this study, YKL-40 was demonstrated to regulate EMT marker expressions such as Twist, Snail, Slug, N-cadherin, Vimentin, and E-cadherin. The protein\'s affects in cancer cell migration and invasion were also observed in YKL-40 overexpression or knock down NSCLC cell lines. Conclusion: All of results from this study suggest that YKL-40 is a major factor in NSCLC metastasis. Thus, YKL-40 may serve as therapeutic target for NSCLC patients in the future.
Far-infrared quasi-monochromatic perfect absorption in a thin GaAs film on gold
(2015-08-15)
Yen, Shun-Tung
;
Chung, Pei-Kang
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
We study the far-infrared absorption properties of a thin GaAs film on Au. We show that a 1.2-mu m GaAs film on Au can completely absorb an electromagnetic wave of 7.9 THz and totally reflect the waves of frequencies not very close to 7.9 THz. The uniformity of the layered structure enables observation of a quasi-monochromatic, nearly perfect absorption of 96% in a 1.4-mu m GaAs film. The absorption can be high for a wide range of incident angles. (C) 2015 Optical Society of America
Square-core single-mode-fiber (SC-SMF) with high bending tolerance for data center networks
(2015-08-15)
Chow, C. W.
;
Huang, S. P.
;
Yeh, C. H.
;
Sung, J. Y.
;
Liu, P. F.
Square-core optical fiber has been proposed recently for high optical power delivery in industrial processing tools with core size larger than 400 x 400 mu m(2). In this work, we first study the possibility of significantly reducing the core side to single-mode condition (i.e. 9 x 9 mu m(2)) at optical communication wavelength. In the proposed square-core single-mode-fiber (SC-SMF), high bandwidth-distance product and low bending loss are achieved. We also discuss the fabrication of the SC-SMF. After this, the bending losses of the SC-SMF and standard single mode fiber (SSMF) are analyzed and compared. Finally, 10 Gb/s signal transmission using conventional on-off keying (OOK) and orthogonal frequency division multiplexing (OFDM) passing through 200 m, 500 m and 1 km SC-SMFs are performed. Negligible power penalty is observed. We believe that this can be another choice of high bending tolerance fiber which is simple to manufacture. (C) 2015 Elsevier B.V. All rights reserved.