Browsing by Issue Date, starting with "2017-04-15"

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A flexible and miniaturized hair dye based photodetector via chemiluminescence pathway
(2017-04-15)
Lin, Ching-Chang
;
Sun, Da-Shiuan
;
Lin, Ya-Lin
;
Tsai, Tsung-Tso
;
Cheng, Chieh
A flexible and miniaturized metal semiconductor metal (MSM) biomolecular photodetector was developed as the core photocurrent system through chemiluminescence for hydrogen peroxide sensing. The flexible photocurrent sensing system was manufactured on a 30-mu m-thick crystalline silicon chip by chemical etching process, which produced a flexible silicon chip. A surface texturization design on the flexible device enhanced the light-trapping effect and minimized reflectivity losses from the incident light. The model protein streptavidin bound to horseradish peroxidase (HRP) was successfully immobilized onto the sensor surface through high-affinity conjugation with biotin. The luminescence reaction occurred with luminol, hydrogen peroxide and HRP enzyme, and the emission of light from the catalytic reaction was detected by underlying flexible photodetector. The chemiluminescence in the miniaturized photocurrent sensing system was successfully used to determine the hydrogen peroxide concentration in real-time analyses. The hydrogen peroxide detection limit of the flexible MSM photodetector was 2.47 mM. The performance of the flexible MSM photodetector maintained high stability under bending at various bending radii. Moreover, for concave bending, a significant improvement in detection signal intensity (14.5% enhancement compared with a flat configuration) was observed because of the increased photocurrent, which was attributed to enhancement of light trapping. Additionally, this detector was used to detect hydrogen peroxide concentrations in commercial hair dye products, which is a significant issue in the healthcare field. The development of this novel, flexible and miniaturized MSM biomolecular photodetector with excellent mechanical flexibility and high sensitivity demonstrates the applicability of this approach to future wearable sensor development efforts.
Real-Time and Noncontact Impulse Radio Radar System for mu m Movement Accuracy and Vital-Sign Monitoring Applications
(2017-04-15)
Hung, Wei-Ping
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Chang, Chia-Hung
;
Lee, Tsern-Huei
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電信工程研究所
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Institute of Communications Engineering
In this paper, a real-time, contactless pulse-based ultra-wideband (UWB) radar sensor was used to precisely detect the movement of the robotic arm, heartbeats, and respiration activities. To increase the object tracking resolution, an algorithm using adaptive and digitalized post-calibration techniques were proposed and tested. Both the radiated and reflected analog pulses were converted to digital signals by a low-noise comparator and its buffer for the time interval and distance detection. Moreover, the dynamic and calibrated tracking mechanism was incorporated into the algorithm for improving tracking accuracy and to continuously localize an object's vibration. The measured performance revealed that the proposed method successfully achieved mu m movement precision, thus providing its excellent tracking ability. We performed three different experimental tests to demonstrate the UWB radar's viability. First, the radar was employed to detect the undesired structural vibration of a delta robotic arm, which was subjected to high acceleration and structural flexibility. The measured results indicated that the accuracy of 100 mu m can be achieved at a 10 Hz vibration frequency. Next, the apnea alarm was tested, which included an embedded sensitive sensor in the smart mattress in order to execute long-term physiological monitoring. The apnea was mitigated by auto-adjusting the patient's sleeping posture on the mattress when the UWB sensor detected the apnea condition. The final experiment using the radar sensor was to monitor human vital signs, such as heart and breathing rates, simultaneously. In comparison with a commercial electrocardiography instrument, this radar sensor measured 73.2 bpm with only 1.2% deviation. Our results shown that the contactless UWB sensor performs superbly and is well-suited for monitoring physiological parameters.
Microstructural analysis and molecular dynamics modeling of shape memory alloys
(2017-04-15)
Yang, Chia-Wei
;
Tsou, Nien-Ti
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材料科學與工程學系
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Department of Materials Science and Engineering
Molecular dynamics (MD) is an effective tool for studying the microstructures in shape memory alloys at the atomic level. However, microstructural analysis of the results generated by MD is typically done by examining lattice constants or monoclinic angles, and only a limited set of the crystal variants can be identified. In the current work, a numerical method that can identify the crystal variants and multiple phases is proposed. By observing the pattern of the components in the transformation matrix of the lattice in the crystal, the corresponding variant of the lattice can be determined. The method is then applied to study the martensitic transformation induced by temperature and ultrahigh shear strain, and the resulting microstructures are verified by literature. Moreover, the microstructural evolution and the volume fraction variation of the crystal variants under ultrahigh shear strain are examined. The observed multiple stages of phase transitions imply that the current method is able to identify the austenitic, orthorhombic, trigonal (R phase), monoclinic, and body-centered orthorhombic crystal systems simultaneously. The proposed method also reveals that the nanometer-sized R phase is a transition zone that maintains the compatibility between the two phases in the different crystal systems. The proposed method is rapid, accurate, and sufficiently versatile to be applicable to other crystal systems and related materials. (C) 2017 Elsevier B.V. All rights reserved.
Nonlinear Absorption Spectroscopy of Porphyrin J-aggregates in Aqueous Solution: Evidence for Control of Degree of Association by Light-Induced Force
(2017-04-15)
Shirakawa, Masayuki
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Nakata, Kazuaki
;
Suzuki, Masaya
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Kobayashi, Takayoshi
;
Tokunaga, Eiji
Spectroscopic evidence was obtained for molecular aggregation states to be controlled by the irradiation of light, which is off-resonant below the peak absorption energies of both monomers and well-grown J-aggregates. In low (undersaturated)-concentration aqueous solutions of porphyrin molecules (tetraphenyl porphyrin tetrasulfonic acid; TPPS) where the monomer absorbance dominates, irradiation with a 532nm laser induces a decrease in the monomer absorbance and an increase in the aggregate absorbance. The increase in the absorbance of J-aggregates occurs in a broad spectral range associated with the increase in the number of not only variously sized oligomer aggregates but also aggregates structurally different from well-grown stable J-aggregates. In high-concentration solutions where the J-aggregate absorbance dominates, a blue shift of the absorption peak of J-aggregates is induced at the same 532nm irradiation, corresponding to a decrease in the aggregation number or in the association energy. By contrast, for spincoated polymer films of monomers and J-aggregates where molecules are immobile, these features are not observed. It is remarkable that the gradient force potential is smaller by more than seven orders of magnitude than the kinetic energy of the thermal motion of the molecule at room temperature, but the absorption change in solution indicating the increase in the number of aggregates is as large as Delta A similar to 10(-3) in magnitude.
Synthesis and biological assay of erlotinib analogues and BSA-conjugated erlotinib analogue
(2017-04-15)
Boobalan, Ramalingam
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Liu, Kuang-Kai
;
Chao, Jui-I.
;
Chen, Chinpiao
;
生物科技學系
A series of erlotinib analogues that have structural modification at 6,7-alkoxyl positions is efficiently synthesized. The in vitro anti-tumor activity of synthesized compounds is studied in two non-small cell lung cancer (NSCLC) cell lines (A549 and H1975). Among the synthesized compounds, the iodo compound 6 (ETN-6) exhibits higher anti-cancer activity compared to erlotinib. An efficient method is developed for the conjugation of erlotinib analogue-4, alcohol compound, with protein, bovine serum albumin (BSA), via succinic acid linker. The in vitro anti-tumor activity of the protein attached erlotinib analogue, 8 (ETN-4-Suc-BSA), showed stronger inhibitory activity in both A549 and H1975 NSCLC cell lines. (C) 2017 Elsevier Ltd. All rights reserved.
網路犯罪之首　詐騙陷阱多
(2017-04-16)
林芃蕙
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Department of Communication and Technology
;
傳播與科技學系
介紹網路詐騙手法及高風險賣場。
邁向大車站　土地仍待活化
(2017-04-16)
曾婕茵
;
Department of Communication and Technology
;
傳播與科技學系
新竹轉運站的啟用，讓後站有了不一樣的容貌，但公部門閒置的空間與暴增的交通量，卻是後站現正面臨的考驗。
動物復健　屏科大動物醫院
(2017-04-16)
陳昱彣
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Department of Communication and Technology
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傳播與科技學系
以照片記錄屏科大動物醫院進行的動物治療及復健。
解答能賺錢　知識經濟夯
(2017-04-16)
朱倫君
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Department of Communication and Technology
;
傳播與科技學系
回答問題也能賺錢？透過動畫帶你一窺知識變現的神奇。
玩家遊戲平台使用比較
(2017-04-16)
魏若芸
;
Department of Communication and Technology
;
傳播與科技學系
簡述台灣與全球玩家遊戲平台的使用比較。
懷念女聲　配音員蔣篤慧
(2017-04-16)
郭宜婷
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Department of Communication and Technology
;
傳播與科技學系
介紹台灣資深女配音員—蔣篤慧老師。
烘焙展　手做的溫度
(2017-04-16)
黃佳俐
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Department of Communication and Technology
;
傳播與科技學系
「2017台北國際烘焙暨設備展」4月6日至9日在南港展覽館舉行，吸引一般民眾和餐飲科系學生前來參觀、一睹最新設備。
維護多樣性　國際母語日
(2017-04-16)
王韋翔
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Department of Communication and Technology
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傳播與科技學系
聯合國教科文組織訂定2月21日為「國際母語日」，希望能夠提倡並保護語言文化的多樣性，許多國家也紛紛響應。
守門員　為健身運動把關
(2017-04-16)
卓業軒
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Department of Communication and Technology
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傳播與科技學系
美國體適能協會深耕台灣十八年，定期舉辦訓練課程與檢定測驗，為運動產業重要的指標守門員。
客家新音樂小檔案
(2017-04-16)
鄧涵文
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Department of Communication and Technology
;
傳播與科技學系
從源頭歷史看到創作元素，再瀏覽具代表性歌手。透過動畫，來一趟客家新音樂小旅行。
一例一休上路　利弊大解析
(2017-04-16)
洪于婷
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Department of Communication and Technology
;
傳播與科技學系
2017年新上路的一例一休法案，對勞工權益有害無益嗎？本篇以新聞圖表詳盡解析一例一休修法後，對勞工的權益影響。
散熱鰭片組
(2017-04-16)
王啟川
;
鄭凱岳
一種散熱鰭片組，包括一基座及多個散熱鰭片。這些散熱鰭片配置於基座上，各散熱鰭片具有相連接的一第一區段及一第二區段，第一區段的面積大於第二區段的面積。這些散熱鰭片包括多個第一散熱鰭片及多個第二散熱鰭片，這些第一散熱鰭片與這些第二散熱鰭片彼此交錯排列。各第一散熱鰭片的第一區段對位於相鄰的第二散熱鰭片的第二區段，且各第一散熱鰭片的第二區段對位於相鄰的第二散熱鰭片的第一區段。
醫師養成　十三餘載
(2017-04-16)
陳奕璇
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Department of Communication and Technology
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傳播與科技學系
台灣醫學系學制自2013年起改為六年制，醫學系學生從大一直到成為主治醫師最快需歷時13年，此篇動畫將詳細介紹各階段細節。
總編輯的話
(2017-04-16)
張博倫
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Department of Communication and Technology
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傳播與科技學系
本期喀報為261期，以「懷念女聲　配音員蔣篤慧」為頭題，深入的介紹配音員蔣篤慧的日常以及工作環境。此外本期兩篇輪播影評都十分精彩，精闢分析人物劇情，讓讀者清楚感受電影魅力。
目擊者在上　誰殺了知更鳥
(2017-04-16)
李瑞彥
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Department of Communication and Technology
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傳播與科技學系
以類型電影的劇本、故事及呈現手法為切入點，評論電影「目擊者」。