Browsing by Issue Date, starting with "2020-05-06"

Now showing 1 - 20 of 5059

Marine gravity determined from multi-satellite GM/ERM altimeter data over the South China Sea: SCSGA V1.0
(2020-05-06)
Zhu, Chengcheng
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Guo, Jinyun
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Gao, Jinyao
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Liu, Xin
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Hwang, Cheinway
High-precision and high-resolution gravity fields can be derived from multi-source satellite altimeter data. A gravity anomaly model around the South China Sea (SCSGA) V1.0 on a 1 ' x 1 ' grid is established from sea surface heights (SSHs) of several geodetic missions (GMs) and exact repeat missions. Gridded deflections of the vertical are first calculated from SSHs by the least squares collocation (LSC) method and then used to derive gravity anomalies by the inverse Vening Meinesz formula. In gravity derivation processing, we establish an approximate relationship among the precision of altimetric gravity, precision of geoid gradients, and density of geoid gradients (the average number of geoid gradients per 1 ' x 1 ' region). The weights of geoid gradients from the Ka-band altimeter for the LSC are innovatively determined by an iterative method. Finally, SCSGA V1.0 is assessed by ship-borne gravity anomalies and marine gravity models. The performance of GMs in gravity derivation is evaluated. In general, the altimetric gravity precision in regions with many islands and reefs increases more obviously than those in other regions when the geoid gradient density increases. The standard deviation of SCSGA V1.0 is 2.78 mGal, which is slightly better than those of four recognized global marine gravity models around the SCS. CryoSat-2 is the most important dataset for SCSGA V1.0. Ka-band SARAL/AltiKa plays a major role in gravity derivation, and the contribution of Haiyang-2A is greater than those of other Ku-band satellites, except CryoSat-2. SCSGA V1.0 is concluded to reach an international advanced level for marine gravity from altimeter data around the SCS.
Structure-Preserving Methods for Computing Complex Band Structures of Three Dimensional Photonic Crystals
(2020-05-06)
Huang, Tsung-Ming
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Li, Tiexiang
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Lin, Jia-Wei
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Lin, Wen-Wei
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Tian, Heng
This work is devoted to the numerical computation of complex band structure k=k(omega)is an element of C3, with omega being positive frequencies, of three dimensional isotropic dispersive or non-dispersive photonic crystals from the perspective of structured quadratic eigenvalue problems (QEPs). Our basic strategy is to fix two degrees of freedom in k and to view the remaining one as the eigenvalue of a complex gyroscopic QEP which stems from Maxwell's equations discretized by Yee's scheme. We reformulate this gyroscopic QEP into a T-palindromic QEP, which is further transformed into a structured generalized eigenvalue problem for which we have established a structure-preserving shift-and-invert Arnoldi algorithm. Moreover, to accelerate the inner iterations of the shift-and-invert Arnoldi algorithm, we propose an efficient preconditioner which makes most of the fast Fourier transforms. The advantage of our method is discussed in detail and corroborated by several numerical results.
Evaluating people's concern about their health information privacy based on power-responsibility equilibrium model: A case of Taiwan
(2020-05-07)
Hwang, Hsin-Ginn
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Lin, Yun
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資訊管理與財務金融系註：原資管所+財金所
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Department of Information Management and Finance
To address the issue of rising expenditure of healthcare service and to fulfill the skyrocketing demand for quality healthcare, the electronic medical records (EMR) exchange has become a vital and indispensable solution for healthcare facilities in terms of being able to share medical information among healthcare providers. Hence, EMR exchange was expected to improve the quality of healthcare and reduce the cost of repetitive medical check-ups and unnecessary treatments. However, recent reports affirming EMR data leaks and compromises have ignited major worldwide privacy concerns over the security of the EMR systems. How to effectively diminish patients' concern for EMR privacy has thus become an important issue that healthcare institution managers/stakeholders have to address urgently. This study leverages the power-responsibility equilibrium perspective to investigate the antecedents and consequences of concerns for the EMR exchange. A survey using 391 responses collected from medical centers, regional and district hospitals in Taiwan was used to conduct this study. The results show that government regulations have a positive effect on hospital privacy policies. Furthermore, both government regulations and hospital privacy policy are negatively associated with concern for EMR information privacy. Additional reports gathered from this study also showed that concern for EMR information privacy could result in patients' protective responses including refusal to provide personal health information (PHI), removal of PHI, negative word of mouth, complaining directly to the hospital, or complaining indirectly to third-party organizations. These findings demonstrate the need for healthcare facilities to formulate robust privacy policies in order to alleviate patients' concern for EMR information privacy based on governmental regulations. This regulation is top-priority as the incapability of reducing patients' concern for EMR information privacy may lead to the collapse of the campaign for the full-adoption of EMR or possibly jeopardize the promotion and application of EMR among healthcare facilities.
Approach to Fast Screen the Formation of an Exciplex
(2020-05-07)
Luo, Dian
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Liao, Chia-Wei
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Chang, Chih-Hao
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Tsai, Chih-Chieh
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Lu, Chin-Wei
Exciplex formation could be confirmed through photoluminescence (PL) measurement of films consisting of both hole transport material (HTM) and electron transport material (ETM) or by measuring the electroluminescence (EL) of organic light-emitting diodes (OLEDs) with an HTM:ETM mixed emitting layer (EML). However, preparation for solid films or OLEDs is time-consuming, thus reducing the effective identification of exciplex systems in broad material combinations. This study proposes a fast-screening method for exciplex formation by measuring PL spectra in a relatively high polar solvent. Several HTM:ETM combinations were used to assess the feasibility of the proposed fast-screening method. The exciplex was further confirmed by phosphorescence as well as transient PL decay. In addition, pure exciplex OLEDs with an HTM:ETM mixed EML exhibited EL spectra akin to their corresponding PL spectra measured in a high polar solvent, verifying exciplex formation. These results demonstrated that our proposed PL measurement in a high polar solvent could effectively accelerate the screening for exciplex formation, thereby boosting the rapid development of exciplex research.
Facile synthesis of core-shell structured Si@graphene balls as a high-performance anode for lithium-ion batteries
(2020-05-07)
Jamaluddin, Anif
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Umesh, Bharath
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Chen, Fuming
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Chang, Jeng-Kuei
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Su, Ching-Yuan
Encapsulating silicon (Si) nanoparticles with graphene nanosheets in a microspherical structure is proposed to increase electrical conductivity and solve stability issues when using Si as an anode material in lithium-ion batteries (LIBs). Currently the main strategies to produce high-quality Si-graphene (Si@Gra) electrodes are (1) chemical vapor deposition (CVD) of graphene grown in situ on Si by hydrocarbon precursors and (2) encapsulating Si with a graphene oxide followed by postannealing. However, both methods require a high-temperature and are costly and time-consuming procedures, which hinders their mass scalability and practical utilization. Herein, we report a Si@Gra composite with a ball-like structure that is assembled by a facile spray drying process without a postannealing treatment. The graphene sheets are synthesized by an electrochemical exfoliation method from natural graphite. The resulting Si@Gra composite exhibits a unique core-shell structure, from which the ball-like morphology and the number of graphene layers in the Si@Gra composites are found to affect both the electric conductivity and ionic conductivity. The Si@Gra composites are found to increase the capacity of the anode and provide excellent cycling stability, which is attributed to the high electrical conductivity and mechanical flexibility of the layered graphene; additionally, a void space in the core-shelled ball structure inside the Si@Gra compensates for the Si volume expansion. As a result, the Si@few-layer graphene ball anode exhibits a high initial discharge capacity of 2882.3 mA h g(-1) and a high initial coulombic efficiency of 86.9% at 0.2 A g(-1). The combination of few-layer graphene sheets and the spray drying process can effectively be applied for large-scale production of core-shell structured Si@Gra composites as promising anode materials for use in high-performance LIBs.
MicroRNA-483 amelioration of experimental pulmonary hypertension
(2020-05-08)
Zhang, Jin
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He, Yangyang
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Yan, Xiaosong
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Chen, Shanshan
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He, Ming
Endothelial dysfunction is critically involved in the pathogenesis of pulmonary arterial hypertension (PAH) and that exogenously administered microRNA may be of therapeutic benefit. Lower levels of miR-483 were found in serum from patients with idiopathic pulmonary arterial hypertension (IPAH), particularly those with more severe disease. RNA-seq and bioinformatics analyses showed that miR-483 targets several PAH-related genes, including transforming growth factor-beta (TGF-beta), TGF-beta receptor 2 (TGFBR2), beta-catenin, connective tissue growth factor (CTGF), interleukin-1 beta (IL-1 beta), and endothelin-1 (ET-1). Overexpression of miR-483 in ECs inhibited inflammatory and fibrogenic responses, revealed by the decreased expression of TGF-beta, TGFBR2, beta-catenin, CTGF, IL-1 beta, and ET-1. In contrast, inhibition of miR-483 increased these genes in ECs. Rats with EC-specific miR-483 overexpression exhibited ameliorated pulmonary hypertension (PH) and reduced right ventricular hypertrophy on challenge with monocrotaline (MCT) or Sugen + hypoxia. A reversal effect was observed in rats that received MCT with inhaled lentivirus overexpressing miR-483. These results indicate that PAH is associated with a reduced level of miR-483 and that miR-483 might reduce experimental PH by inhibition of multiple adverse responses.
胡瓊之　打造新竹手作的藏寶盒
(2020-05-10)
邱于非
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Department of Communication and Technology
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傳播與科技學系
「藏物少女」胡瓊之，創立了思微藏物以及藏物市集，致力於推廣手作工藝，讓新竹不再只是科技城，也能是充滿文創藝術的藏寶盒。
通姦除罪　讓夫妻的世界崩裂嗎
(2020-05-10)
詹庭瑄
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Department of Communication and Technology
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傳播與科技學系
台灣通姦罪案例通常以撤告或不足以證明有罪結束，通姦罪真的能保障婚姻幸福嗎？性忠貞若為對婚姻契約的承諾，違反承諾時應回到民法來處理。
危老改建的列車將開往何處？
(2020-05-10)
邱欣誼
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Department of Communication and Technology
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傳播與科技學系
《都市危險及老舊建築物加速重建條例》部分條文修正案於4月17日立法院三讀通過。原本預計今年5月屆滿到期的建築基地基準容積10%的獎勵措施，延長保留，在未來五年的時間內已獎勵比例逐漸降低的落日方式退場。
做該做的事　保險業務沒那麼難
(2020-05-10)
廖玥茹
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Department of Communication and Technology
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傳播與科技學系
成功的秘訣是什麼？一名保險業的處經理，業績還是可以在全國名列前茅；底下的業務多是八年級生，卻可以達到百萬年薪。靠的只是「做對的事」，以及想幫助人的心。簡單的態度，造就了王國書的地位。
用網紅的力量為地球盡一份心力
(2020-05-10)
許峰睿
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Department of Communication and Technology
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傳播與科技學系
【網紅們嘗試解決地球問題】專題

地球溫度年年突破新高，人類持續排放二氧化碳，導致地球嚴重暖化。身為世界公民，應該多加關注環保議題，為地球盡一份心力。網紅發出的聲音是有力的，因此網紅可以運用自己的力量來集結大眾一同面對這個問題。
Cathodic plasma-induced syntheses of graphene nanosheet/MnO2/WO3 architectures and their use in supercapacitors
(2020-05-10)
Huang, Shih-Yu
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Phuoc-Anh Le
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Yen, Po-Jen
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Lu, Yi-Chun
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Sahoo, Sumanta Kumar
In this study, we synthesized new 0.01-2 mu m graphene nanosheet/MnO2WO3(G/MnO2/WO3) architectures through an electrochemically induced cathodic plasma process in a single batch at a lower temperature (70 degrees C) and for a shorter time (2 h) than those required for the syntheses of similar structures when using a hydrothermal method. We first obtained 0.01-1 mu m leaf-like graphene (G) nanosheets, then 0.1-0.3 mu m long and approximately 10 nm diameter petiole-like MnO2 nanowires on the G nanosheets, and finally 0.20-2.0 mu m petal-like WO3 on MnO2/G - thereby forming the G/MnO2/WO3 architectures - as evidenced using scanning electron microscopy and transmission electron microscopy. We deciphered the step-wise reaction mechanism behind the formation of the G/MnO2/WO3 architectures during the plasma process. The high surface area of 291 m(2) g(-1) in the G/MnO2/WO3 architecture was contributed mainly by the G nanosheets, providing a suitable surface area for diffusion of the charge carriers during the charging and discharging process. As a result, an electrode incorporating the G/MnO2/WO3 architectures exhibited an excellent specific capacitance of 620 F g(-1) - 45 and 200% higher than those of G/MnO2 (421 F g(-1)) and G (189 F g(-1)) electrodes, respectively - at a current density of 0.5 A g(-1). Moreover, the G/MnO2/WO3-incorporated electrode exhibited good electrochemical cycling stability, with 90% capacitance retention over 5000 cycles at 1 A g(-1). Such new G/MnO2/WO3 heterojunction structures, not only provide high-performance electrode applications, but also suggest a potential approach toward fabricating other heterojunction structures having high surface areas for energy storage applications. (C) 2020 Elsevier Ltd. All rights reserved.
加上濾鏡　讚數會變多嗎？
(2020-05-10)
黃順愉
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Department of Communication and Technology
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傳播與科技學系
頭上的貓耳朵、臉上的花朵或是讓身邊閃閃發亮的效果，這些都是時下流行的濾鏡元素。為了讓自己看起來更完美，人們在自拍時，會選擇加上濾鏡或放一些貼圖。這些濾鏡真的會讓自拍加分嗎？
資源班你知道多少呢？
(2020-05-10)
黃博暄
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Department of Communication and Technology
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傳播與科技學系
【台灣資源班現況】專題

資源班的學生常常被貼上負面標籤。如果我的小孩進資源班就是問題學生嗎？資源班的相關知識你知道多少呢？現在，別再一昧地用錯誤的知識，來評斷資源班了。
總編輯的話
(2020-05-10)
周容萱
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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337期，總計有12篇文章。其中有3篇社會議題，3篇科技新知，2篇人物特寫，以及4篇資訊圖表。本期頭題為詹庭瑄的《通姦除罪　讓夫妻的世界崩裂嗎》，文筆通暢，豐富且切合時事的內容，咀嚼文字之餘能深思其議題性。
電子產品會影響孩子溝通能力嗎？
(2020-05-10)
李詠濠
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Department of Communication and Technology
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傳播與科技學系
現在的小朋友整天活在手機和電腦的世界裡，導致多數時間都是透過文字訊息來溝通，究竟活在螢幕前的他們，在面對面的社交能力上是否受到影響呢？
那些你不知道的離婚數據
(2020-05-10)
張筠婕
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Department of Communication and Technology
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傳播與科技學系
【理性看離婚】專題

近年來，台灣的離婚率在全球名列前茅，且每年結婚對數逐漸減少，形成「婚姻淨流出」的現象。本篇報導將整理台灣離婚的相關數據，帶大家一探究竟。
更年期難以啟齒的那些事
(2020-05-10)
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

更年期是每個女人必經的生命歷程，然而人們對於更年期的認識卻是少之又少，造成大眾對更年期產生了種種誤解。這樣的結果對身處於更年期階段的女性是不公平的，往往令她們的處境十分尷尬。
Déjà vu真的能夠預測未來嗎？
(2020-05-10)
李育陞
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Department of Communication and Technology
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傳播與科技學系
明明沒到過的地方卻讓人感到很熟悉？明明是正在發生的事卻感覺好像已經發生過了，甚至感覺能夠預測到接下來會發生的事？Déjà vu真的有預測未來的功能嗎？
台灣電動車　充電方式是阻礙？
(2020-05-10)
王冠云
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Department of Communication and Technology
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傳播與科技學系
歐洲各國都在喊禁售燃油車的同時，台灣的禁售燃油車政策卻喊卡。為何電動車在台灣無法普及？