Browsing by Issue Date, starting with "2020-05-17"

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健身補品　你真的需要買嗎?
(2020-05-17)
吳政陽
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Department of Communication and Technology
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傳播與科技學系
【健身補品背後的秘密】專題

看著社群媒體上的偶像，再看著鏡子中的自己，心動的想著，是不是用了他們代言的健康產品，自己也能擁有那樣的好身材？但是你曾否想過，傲人身材的背後是堅定的意志力，補品不是捷徑。
今天你剩菜了嗎？
(2020-05-17)
高儷玲
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Department of Communication and Technology
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傳播與科技學系
【台灣剩食大解密】專題

隨著科技進步，人類的飲食也比古代好很多，無論是選擇性或是產量都大幅提升，卻也迎來「剩食」問題，就讓本篇報導帶你認識剩食議題。
被污名化的更年期
(2020-05-17)
李而
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Department of Communication and Technology
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傳播與科技學系
【被「有色眼鏡」看待的女性更年期】專題

對女性來說，更年期是一段重要的生命歷程。這個階段的女性會經歷生理與心理上的轉變，過程往往會令人不適。然而大眾對於更年期女性卻是帶有偏見的，常常會以異樣的眼光去看待她們。
運動賽事防疫對策背後的影響
(2020-05-17)
邱于非
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Department of Communication and Technology
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傳播與科技學系
因為疫情關係，許多運動賽事必須面臨停辦、延期等。雖然為了防疫做出因應對策是無可避免的，但當大家認同或接收到這樣的決策時，是否能理解背後最直接受到影響的運動員權益呢？
總編輯的話
(2020-05-17)
張筠婕
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Department of Communication and Technology
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傳播與科技學系
本期為喀報第338期，總計有11篇文章。包含4篇社會議題、4篇資訊圖表以及3篇文化現象。本期頭題為周容萱的《「我們」的共融式遊戲場》，新穎的題材、豐富且完整的內容，探討容易受大眾忽視的共融式遊戲場。此外，本期的資訊圖表題材多元，值得大家一探究竟。
「我們」的共融式遊戲場
(2020-05-17)
周容萱
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Department of Communication and Technology
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傳播與科技學系
【遊戲場不再只屬於你】專題

每逢假日，總能在各地公園看見許多父母帶著孩子前去玩耍。但你是否曾經想過，具有身心障礙的小朋友們，要怎麼使用那些常見的遊樂設施呢？
OTT崛起，瓜分影視市場
(2020-05-17)
廖玥茹
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Department of Communication and Technology
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傳播與科技學系
【OTT席捲全球　台灣準備好了嗎】專題

2016年被稱為台灣OTT元年，至今不到5年，OTT影音平台已百家爭鳴，而台灣本土的發展卻仍有待加強。本報導整理近年台灣影視產業的變化，帶大家意識到OTT的重要性。
與獼猴和平共處　並不困難
(2020-05-17)
何雨潮
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Department of Communication and Technology
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傳播與科技學系
台灣獼猴是台灣特有種動物，聰明的牠們有許多和人類相似的舉動，讓人很難不去注意。但同時也很多人討厭獼猴，誤會牠們。我們同處台灣這塊土地，多少都會起衝突，如何與獼猴和平共處，才是正確的解決之道。
五線譜上的窄門
(2020-05-17)
謝孟如
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Department of Communication and Technology
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傳播與科技學系
提及音樂系，常常會聯想到悠揚的樂聲、優雅的演奏會還有閃閃發亮的樂器，然而那光鮮亮麗的表面的底下，卻是由日復一日的練習、以及無盡的金錢所堆砌而成，在極少數站在大舞台的演奏家背後，又有多少心有不甘的莘莘學子和家長？
大學生與他們的憂鬱
(2020-05-17)
黃順愉
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Department of Communication and Technology
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傳播與科技學系
【大學生與校園諮商】專題

18歲至24歲的年齡，是許多人在大學裡的「黃金時代」。大學生們為了夢想揮灑汗水和青春，但也有許多人的生命在這段時間戛然而止。蓄意自我傷害而造成的死亡（自殺）在這個年齡段一直穩居第二，僅次於事故意外死亡。大學生的憂鬱不容忽視，本篇報導將整理大學生憂鬱的相關數據
向山致敬　認識台灣百岳
(2020-05-17)
王冠云
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Department of Communication and Technology
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傳播與科技學系
【向山致敬　認識台灣】專題

在台灣共計有268座三千公尺以上的高山，百岳則是在台灣擁有奇、險、峻、秀，且山容起伏明顯的一百座山峰。較為知名的百岳有雪山、大霸尖山，以及台灣最高峰——玉山。
粵語的沒落
(2020-05-17)
李詠濠
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Department of Communication and Technology
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傳播與科技學系
【港澳教育內地化】專題

近年，愈來愈多的內地生到香港升學，加上香港的教育政策「普教中」，使得香港街上都能聽到普通話的存在，粵語的位置是否會被普通話取代呢？
A Lithium-Ion Rechargeable Full Cell Using the Flower-like Na3V2(PO4)(3)@C Cathode and Li4Ti5O12 Anode
(2020-05-18)
Akhtar, Mainul
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Pradhan, Sunil Kumar
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Chang, Jeng-Kuei
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Majumder, Subhasish Basu
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材料科學與工程學系
In the present work, we have demonstrated that nanopetal-assembled hierarchical carbon-coated Na3V2(PO4)(3) (nNVP@C) microflowers, synthesized via a microwave-assisted hydrothermal route, play an important role for yielding superior electrochemical characteristics of a Li4Ti5O12 (LTO)//nNVP@C full cell. Thus, the full cell yields superior power density with decent discharge capacity after extended cycling and good rate performance. The nanosize petals help Li+ to diffuse faster in NVP particles, and the inner mesoporous morphology of microflowers allows the electrolyte to easily penetrate into the embedded NVP@C nanocrystals. Furthermore, the homogeneous carbon coating provides an elastic buffer to mitigate the strain developed during Na+ extraction and subsequent Li+ insertion and extraction. The LTO//nNVP@C full cell is claimed to be suitable for power applications, where relatively thinner electrodes would be flooded with a sufficient amount of the lithium salt-containing organic electrolyte. To improve the cycleability characteristics, one requires to match carefully the Li+ activity in the organic electrolyte with electrode capacity. This would ensure stoichiometric lithium-ion insertion in the LTO electrode together with predominant lithium-ion insertion in the nNVP@C cathode.
Corporate social responsibility on customer behaviour: the mediating role of corporate image and customer satisfaction
(2020-05-18)
Wang, Chih-Chuan
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交大名義發表
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National Chiao Tung University
Corporate social responsibility (CSR) plays an important role in corporate profits, corporate reputation, and consumer attitudes; it has been identified as a critical marketing strategy for enterprise business activities and corporate sustainable development. How does CSR influence the consumer behaviour towards profit making for the enterprise? This issue has been an important research topic in the enterprise and management areas. Nevertheless, the mechanisms underlying how CSR can affect the consumer behavioural intention (CBI) have rarely been addressed in the literature. This study investigates the relationship between CSR and CBI, emphasising on using corporate image and customer satisfaction as the mediate factors. Focusing on the bicycle industry, a total number of 491 valid questionnaires from the consumers are retrieved and are then analyzed using the structural equation modelling. Our analyses show that CSR has a positive effect on corporate image, customer satisfaction, and price premium. In addition, CSR can affect the customer behavioural intention (purchase intention and price premium) through enhancing corporate image and customer satisfaction. Our results clarify the relationship between CSR and CBI, and can offer a sound academic support for future related research and practical applications.
Trapping a pentagonal molecule in a self-assembled molecular network: an alkoxylated isosceles triangular molecule does the job
(2020-05-18)
Anzai, Masaru
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Iyoda, Masahiko
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De Feyter, Steven
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Tobe, Yoshito
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Tahara, Kazukuni
We herein report a unique example of on-surface adaptive self-assembly. A pentagon-shaped macrocycle, cyclic [5]meta-phenyleneacetylene [5]CMPA, is trapped by the adaptive supramolecular network formed by an isosceles triangular molecule, alkoxy substituted dehydrobenzo[14]annulene [14]ISODBA at the liquid/graphite interface, leading to a highly ordered and large-area bicomponent self-assembled molecular network (SAMN), as revealed by scanning tunneling microscopy (STM).
( )Ultrafast Exciton Dynamics in Scalable Monolayer MoS2 Synthesized by Metal Sulfurization
(2020-05-19)
Tsai, Hsu-Sheng
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Huang, Yung-Hung
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Tsai, Po Cheng
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Chen, Yi-Jia
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Ahn, Hyeyoung
Excitons in monolayer transition metal dichalcogenides (TMDs) have exceptionally large binding energies and dominate the optical properties of materials. Exploring the relaxation behavior of excitons is crucial for understanding the fundamental physics as well as the performance of TMD-based optoelectronic devices. However, ultrafast carrier dynamics is sensitive to the structural defects and surface conditions of TMDs, depending on the growth or transfer process. Here, we utilized pump-probe transient absorption (TA) spectroscopy with a white-light probe to investigate the dynamics of excitons in monolayer MoS2 synthesized by the metal sulfurization method. The sulfurization method was used for the fabrication of large-scale, continuous, and uniform thin films with a controllable number of layers. The excitation dynamics of the wafer-size monolayer MoS2 is found to be comparable to that of monolayer MoS2 flakes grown by chemical vapor deposition (CVD). The dominant processes of carrier relaxation in the monolayer MoS2 are exciton-exciton annihilation (hundreds of femtoseconds), the trapping of the excitons by surface states (a few picoseconds), and interband carrierphonon scattering (tens of picoseconds). Moreover, the induced absorption due to mid-gap defects, which is often observed for samples fabricated by growth methods, such as CVD, is not observed for our continuous and uniform monolayer films. Understanding the charge carrier dynamics of the exciton in the scalable and uniform monolayer MoS2 can provide physical insights that are valuable in the design and development of complex 2D devices.
Pd/light-induced alkyl-alkenyl coupling reaction between unactivated alkyl iodides and alkenylboronic acids
(2020-05-21)
Huang, Hsin-Ju
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Wang, Yi-Ting
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Wu, Yen-Ku
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Ryu, Ilhyong
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應用化學系
Alkyl-alkenyl coupling reaction between unactivated alkyl iodides and 2-arylalkenylboronic acids utilizing a Pd/light combined system was studied. This reaction provided 2-alkylarylalkenes in good yields. It is proposed that in this reaction alkyl radicals are formed by SET from a Pd catalyst to alkyl iodides, which then undergo addition reactions to form C-C double bonds of alkenyl boronic acids and the subsequent beta-fragmentation of boronyl radicals leads to the formation of alkyl-substituted arylalkenes.
Structure-mechanics statistical learning unravels the linkage between local rigidity and global flexibility in nucleic acids
(2020-05-21)
Chen, Yi-Tsao
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Yang, Haw
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Chu, Jhih-Wei
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交大名義發表
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生物資訊及系統生物研究所
The mechanical properties of nucleic acids underlie biological processes ranging from genome packaging to gene expression, but tracing their molecular origin has been difficult due to the structural and chemical complexity. We posit that concepts from machine learning can help to tackle this long-standing challenge. Here, we demonstrate the feasibility and advantage of this strategy through developing a structure-mechanics statistical learning scheme to elucidate how local rigidity in double-stranded (ds)DNA and dsRNA may lead to their global flexibility in bend, stretch, and twist. Specifically, the mechanical parameters in a heavy-atom elastic network model are computed from the trajectory data of all-atom molecular dynamics simulation. The results show that the inter-atomic springs for backbone and ribose puckering in dsRNA are stronger than those in dsDNA, but are similar in strengths for base-stacking and base-pairing. Our analysis shows that the experimental observation of dsDNA being easier to bend but harder to stretch than dsRNA comes mostly from the respective B- and A-form topologies. The computationally resolved composition of local rigidity indicates that the flexibility of both nucleic acids is mostly due to base-stacking. But for properties like twist-stretch coupling, backbone springs are shown to play a major role instead. The quantitative connection between local rigidity and global flexibility sets foundation for understanding how local binding and chemical modification of genetic materials effectuate longer-ranged regulatory signals.
Inter- and Intragrain Inhomogeneity in 2D Perovskite Thin Films Revealed by Relative Grain Orientation Imaging Using Low-Frequency Polarized Raman Microspectroscopy
(2020-05-21)
Toda, Shogo
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Yanagita, Naoya
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Jokar, Effat
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Diau, Eric Wei-Guang
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Shigeto, Shinsuke
Two-dimensional (2D) organic-inorganic hybrid lead halide perovskites make up an emerging class of semiconductor materials for optoelectronic applications such as solar cells. The grain structure of polycrystalline 2D perovskites is one of the key factors that dictate their functionality in the devices, but currently available methods for in situ, chemically specific characterization of 2D perovskite grains are scarce. Here we show that ultra-low-frequency polarized Raman microspectroscopy is a facile yet powerful tool for visualizing relative grain orientations within 2D perovskite thin films. We demonstrate this method on the simplest 2D perovskite, (CH3(CH2)(3)NH3)(2)PbI4. Hierarchical clustering and detailed band decomposition analysis of the low-frequency polarized Raman imaging data reveal not only relative grain orientations but also intragrain inhomogeneity. We envisage that with high chemical specificity, this method will find broad applications ranging from other 2D perovskites to perovskite-based optoelectronic devices.
Contributions of Abundant Hydroxyl Groups to Extraordinarily High Photocatalytic Activity of Amorphous Titania for CO2 Reduction
(2020-05-21)
Kharade, Aparna K.
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Chang, Sue-min
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環境工程研究所
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Institute of Environmental Engineering
Despite severe charge recombination occurring within the bulk lattice, sol-gel-derived amorphous TiO2 particles with abundant OH groups (81.6 mg/g) and high surface area (274 m(2)/g) were for the first time demonstrated to exhibit respectively 8-14 and 9 times higher photocatalytic activity for CO2 reduction than their thermally derived anatase crystals and the commercial P25 powder. Moreover, the high density of the OH groups (12.45/nm(2)) enabled the amorphous oxide to exhibit higher specific surface reactivity than the crystals. The OH groups not only converted CO2 molecules into bonded bicarbonate/carbonate species to improve CO2 chemisorption but also trapped holes to form Ti-O-O-Ti species when the OH density was higher than a threshold value of 8.74/nm(2), which synergistically promoted interfacial charge transfer. Bidentate carbonate and center dot CO2- were two active species that were able to underwent CO32- -> Ti-OOCH2 -> Ti-O-CH3 -> CH4 and center dot CO2- -> CO22- -> Ti-COOH -> CO sequences on the hydroxylated surface to produce CH4 and CO products, respectively. High coverage of the chemisorbed carbonate species selected for CO2 reduction rather than H-2 evolution to proceed. Moreover, it led with CH4 as the major product. Oxygen vacancies were the major active sites on the anatase crystals. Their influences on the surface transformations were also characterized to comprehensively understand the surface-controlled activity and selectivity.