Browsing by Issue Date, starting with "2020-04-10"

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Adjustable panoramic inspection system for submillimeter fasteners
(2020-04-10)
Yan, Yung-Jhe
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Tsai, Ming-Shiou
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Chen, Wen-Bin
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Chen, You-Bo
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Sun, Ching-Cherng
Fasteners are critical and indispensable locking components in mechanical assembly. Submillimeter fasteners are massively and widely used in electronic devices. This study proposed an adjustable panoramic inspection system for M2 to M0.8 submillimeter fasteners. The system mainly consists of a panoramic imaging module, a back-light module, and an image grabbing and computing module. The panoramic imaging module would form four equal optical path lengths to keep the same imaging amplification between the different directions of the field of view. The back-light module was designed to provide uniform illumination and enhance the contrast of the pitch edge between the fasteners and the background. The image grabbing and computing module with a high-speed camera was designed to be adjustable for different sizes of submillimeter fasteners. The realized system can offer the function of four images in one shot to make a panoramic scene, independent illumination for recognizing, inspect screws from M0.8 to M2.0 screws, and short time consumption of image processing, such as 3.284 ms for M0.8 screws and 2.384 ms for M2.0 screws, to achieve examination of 6000 pieces in 1 min. (C) 2020 Optical Society of America.
Rotational spectroscopy and astronomical search for glutaronitrile
(2020-04-10)
Cabezas, C.
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Bermudez, C.
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Endo, Y.
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Tercero, B.
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Cernicharo, J.
Context. Nitriles constitute almost 15% of the molecules observed in the interstellar medium (ISM), surprisingly only two dinitriles have been detected in the ISM so far. The lack of astronomical detections for dinitriles may be partly explained by the absence of laboratory rotational spectroscopic data.Aims. Our goal is to investigate the rotational spectrum of glutaronitrile, N equivalent to C-CH2-CH2-CH2-C equivalent to N, in order to allow its possible detection in the ISM.Methods. The rotational spectrum of glutaronitrile was measured using two different experimental setups. A Fourier transform microwave spectrometer was employed to observe the supersonic jet rotational spectrum of glutaronitrile between 6 and 20 GHz. In addition, the mmW spectrum was observed in the frequency range 72-116.5 GHz using a broadband millimetre-wave spectrometer based on radio astronomy receivers with fast Fourier transform backends. The spectral searches were supported by high-level ab initio calculations.Results. A total of 111 rotational transitions with maximum values of J and K-a quantum numbers 54 and 18, respectively, were measured for the gg conformer of glutaronitrile. The analysis allowed us to accurately determine the rotational, nuclear quadrupole coupling, quartic and sextic centrifugal distortion constants. These rotational parameters were employed to search for glutaronitrile in the cold and warm molecular clouds Orion KL, Sgr B2(N), B1-b and TMC-1, using the spectral surveys captured by IRAM 30 m at 3 mm. Glutaronitrile was not detected, and the upper limits' column densities were derived. Those are a factor of 1.5 and 5 lower than those obtained for the total column densities of the analogous succinonitrile in Orion KL and Sgr B2, respectively.
連假趴趴走　惹議也惹「疫」
(2020-04-12)
張筠婕
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Department of Communication and Technology
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傳播與科技學系
新型冠狀病毒（COVID-19）在全球蔓延，根據中央流行疫情指揮中心統計，國內截至目前有385人確診（境外移入331例、本土感染54例）、6人死亡。相較許多疫情爆發的國家，台灣的防疫受到各國的讚賞及效仿，成為全球熱議焦點。不過，在經過四天的清明連假，不少人擔心台灣各景點的人潮已成為防疫破口，引發許多爭議。
想像與恐懼　怪物對你的心理戰
(2020-04-12)
邱于非
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Department of Communication and Technology
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傳播與科技學系
兒童文學中的怪物其實是有演變規則的，面對不同年齡層擁有的想像力與心態成熟度，如何會是「成功的」怪物，其中需要依循的是許多層面的心理學。
「圓」來沒自信　但要很努力
(2020-04-12)
詹庭瑄
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Department of Communication and Technology
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傳播與科技學系
她，沒有浪費任何舞台下的日常累積，那些在咖啡廳自我懷疑、在電視台焦頭爛額、在韓國冒險的日子，成為了最好的養分，造就如今54萬訂閱的Youtuber。她是阿圓，本名王莉茵，一個沒有自信，但很努力的女孩。
芝麻開門　走進平等的藝術世界
(2020-04-12)
何雨潮
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Department of Communication and Technology
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傳播與科技學系
林滿足自稱「小小米」，也就是芝麻開門（Sesame）的音譯。她希望能成為人與藝術之間的橋梁，帶領人們走入藝術大門。
用玩具紀錄人生的大男孩
(2020-04-12)
李詠濠
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Department of Communication and Technology
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傳播與科技學系
紀錄回憶有千種方法，你有沒有想過用玩具記下自己曾經發生過的事？
李榮峰　尊重生命的行動教育家
(2020-04-12)
梁子敬
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Department of Communication and Technology
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傳播與科技學系
「要先懂得尊重動物，才有辦法去愛人，我要用教育改變這個世界。」
「憾」你再次活著，第二個人生
(2020-04-12)
黃博暄
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Department of Communication and Technology
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傳播與科技學系
如果某一天妳死而復生，你最想做的是什麼？韓國熱播連續劇《哈囉掰掰，我是鬼媽媽》，透過深刻描寫鬼媽媽死後和復生的心境，來探討死亡的議題。
大自然的女兒　張碧員
(2020-04-12)
李而
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Department of Communication and Technology
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傳播與科技學系
一本書是如何誕生的？大樹文化主編張碧員從她熱愛的大自然裡獲取創作養分，真實地記錄她眼中的一草一木。對她來說，大自然不僅僅是工作的場域，更是養育她，使她不斷成長的溫暖母親。
Kumu Walis　台灣與大溪地間的橋樑
(2020-04-12)
王冠云
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Department of Communication and Technology
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傳播與科技學系
賽德克原住民與大溪地，透過舞蹈連結了南島民族，建立文化之間的交流。
那些年，我們誤會的「八卦」
(2020-04-12)
廖玥茹
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Department of Communication and Technology
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傳播與科技學系
你有沒有想過，為什麼多數人不願自己被貼上「愛說八卦」的標籤，但還是喜歡談論他人的事？一個德國研究在調查人們八卦的動機時，也分析了「黑暗」的人是否更容易跟別人咬耳根子。然而種種結果都與我們認知不同，八卦的壞名聲似乎看起來不太合理。
需要正能量？開啟「手癢計劃」
(2020-04-12)
黃順愉
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Department of Communication and Technology
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傳播與科技學系
《教你10分鐘變成台灣人》或是《在台灣挑戰馬來西亞腔》的影片你看過嗎？浮誇的表情、明亮的配色，加上顯眼的標題，是她影片縮圖的標誌。一句「哈囉大家好，我是Soya～」便開啟了她的搞笑日常。
總編輯的話
(2020-04-12)
謝孟如
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Department of Communication and Technology
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傳播與科技學系
本期為喀報333期，此次上架的文章共13篇，包含8篇人物專訪、2篇科技新知、2篇藝文評論以及1篇社會議題。本次頭題為邱于非的《想像與恐懼　怪物對你的心理戰》，為何我們兒時聽過的怪物大野狼、天狗，如今已不再可怕；我們害怕怪物的潛在原因是什麼，都可以在本篇報導找到答案。
那些關於《她們》與我們的故事
(2020-04-12)
高儷玲
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Department of Communication and Technology
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傳播與科技學系
《她們》一部探討女性如何探索自我、突破傳統框架的電影，同時帶領觀眾以現代的角度看經典名著《小婦人》。
只要有人，就有社群：陳思傑
(2020-04-12)
李育陞
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Department of Communication and Technology
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傳播與科技學系
一位優秀的社群行銷人，如何從外商離開後自己創立社群顧問公司？如何從經營自媒體到創立全台知名的社團「社群丼」？讓我們來看看屬於陳思傑的故事。
Polarization aberrations of electrically tunable liquid crystal mirrors
(2020-04-13)
Wang, Yu-Jen
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Lin, Yi-Hsin
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Cakmakci, Ozan
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Reshetnyak, Victor
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光電工程學系
Curved mirrors are able to fold optical paths and play important roles in compact optical systems in general. In this paper, we investigate the polarization aberrations of electrically tunable liquid crystal (LC) mirrors with two kinds of configurations (flat and curved ones). The LC mirrors exhibit spatially-continuous tunable wavefronts. The detailed wavefronts of two LC mirrors are related to angles of incidence, polarization of light, and the alignment direction of LC molecules. The key contribution of this paper is the development and characterization of a tunable liquid crystal mirror. The tunability of polarization aberration of LC mirrors should be able to provide extra parameters for optical engineers to design versatile optical systems. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Suppressed humoral immunity is associated with dengue nonstructural protein NS1-elicited anti-death receptor antibody fractions in mice
(2020-04-14)
Tsai, Chung-Lin
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Sun, Der-Shan
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Su, Mei-Tzu
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Lien, Te-Sheng
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Chen, Yen-Hsu
Dengue virus (DENV) infections may cause life-threatening dengue hemorrhagic fever (DHF). Suppressed protective immunity was shown in these patients. Although several hypotheses have been formulated, the mechanism of DENV-induced immunosuppression remains unclear. Previously, we found that cross-reactive antibodies against tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) receptor 1 (death receptor 4 [DR4]) were elicited in DHF patients, and that anti-DR4 autoantibody fractions were elicited by nonstructural protein 1 (NS1) immunizations in experimental mice. In this study, we found that anti-DR4 antibodies could suppress B lymphocyte function in vitro and in vivo. Treatment with the anti-DR4 immunoglobulin (Ig) induced caspase-dependent cell death in immortalized B lymphocyte Raji cells in vitro. Anti-DR4 Igs elicited by NS1 and DR4 immunizations markedly suppressed mouse spleen transitional T2 B (IgM(+)IgD(+)), bone marrow pre-pro-B (B220(+)CD43(+)), pre-B (B220(+)CD43(-)), and mature B cell (B220(+)IgD(+)) subsets in mice. Furthermore, functional analysis revealed that the pre-elicitation of anti-NS1 and anti-DR4 Ig titers suppressed subsequently neutralizing antibody production by immunization with DENV envelop protein. Our data suggest that the elicitation of anti-DR4 titers through DENV NS1 immunization plays a suppressive role in humoral immunity in mice.
Functionalization and antioxidant activity of polyaniline-fullerene hybrid nanomaterials: a theoretical investigation
(2020-04-15)
Nguyen Minh Thong
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Vo, Quan V.
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Trinh Le Huyen
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Mai Van Bay
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Nguyen Nho Dung
Functionalized fullerene is one of the most advantageous nanotechnologies to develop novel materials for potential biomedical applications. In this study, we applied the ONIOM-GD3 approach to explore the nucleophilic addition reaction mechanism between polyaniline (emeraldine and leucoemeraldine forms) and fullerene. Potential energy surfaces were also analyzed to predict the predominantly formed products of the functionalized reaction. The themoparameters, such as bond dissociation enthalpy (BDE), ionization energy (IE), and electron affinity (EA), characterized by two mechanisms HAT and SET, were used to evaluate the antioxidant activities of the selected compounds. Moreover, the calculated HOMO, LUMO, and DOS results indicate that the electronic structures of polyaniline-fullerene were significantly affected by the presence of fullerene. The computational results show that C60-L1 seems to be the best antioxidant following the SET mechanism.
Electrically Injected GaN-Based Vertical-Cavity Surface-Emitting Lasers with TiO2 High-Index-Contrast Grating Reflectors
(2020-04-15)
Chang, Tsu-Chi
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Hashemi, Ehsan
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Hong, Kuo-Bin
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Bengtsson, Jorgen
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Gustaysson, Johan
We demonstrate the first electrically injected GaNbased vertical-cavity surface-emitting lasers (VCSELs) with a TiO2 high-index-contrast grating (HCG) as the top mirror. Replacing the top distributed Bragg reflector (DBR) with an HCG offers substantial thickness reduction, polarization-pinning, and setting of the resonance wavelength by the grating parameters. Conventional HCGs are usually suspended in the low refractive index material, such as air, in order to create the largest refractive index contrast. However, the mechanical stability of such structures can be questioned and creating free-hanging GaN-membrane on top of GaN is problematic. We have therefore fabricated TiO2-HCGs resting directly on GaN without an air-gap. No DBR layers are used below the HCG to boost the reflectivity. A VCSEL with an aperture diameter of 10 mu m shows a threshold current of 25 mA under pulsed operation at room temperature. The lasing modes locate around 400 nm and are transversely electrically -polarized with a line width of 0.5 nm. The full-width half-maximum beam divergence is 10 degrees. This demonstration of a TiO2-HCG VCSEL offers a new route to achieve polarization pinning and could also allow additional benefits such as postgrowth setting of the resonance wavelength.