Tainan University of Technology

About: Tainan University of Technology is a education organization based out in Tainan City, Taiwan. It is known for research contribution in the topics: Password & Authentication. The organization has 311 authors who have published 641 publications receiving 10826 citations.

Tuning of electronic properties of nanographene ribbons by a spatially modulated electric field

Abstract: The electronic properties of a nanographene ribbon can be significantly tuned by a spatially modulated electric field. The modulated electric potential results in the changes of the electronic properties, i.e., modified energy dispersions, creation of extra band-edge states, alteration of the energy gap, and induction of semiconductor-metal transition. The number of the free carrier increases with the increment of the field strength. Through further classification of the carbon atoms, the features of the wave functions are clearly presented, and the carrier distribution is drastically modulated under the influence of the electric field. The periodic length and the phase shift of the modulated electric field induce a change in the y-axis symmetry of the ribbon and have a significant influence on the energy of the partial flat bands, the energy gap and the carrier distribution. The characteristics of the band structure are directly revealed in the density of states (DOS). The number, heights, positions, and...

Effect of nanoscale fully vulcanized acrylic rubber powders on crystallization of poly(butylene terephthalate): Nonisothermal crystallization

Abstract: Poly(butylene terephthalate) (PBT) was blended with different content (1, 3, and 6 wt %) of nanoscale fully vulcanized acrylic rubber (FVAR) powders in a twin extruder to prepare PBT/FVAR composites (PBT/FVAR1, PBT/FVAR3, and PBT/FVAR6).The influence of different content (1, 3, and 6 wt %) of nanoscale FVAR powder on the nonisothermal crystallization behavior of PBT was investigated by using differential scanning calorimeter. The nonisothermal crystallization data were analyzed using Avrami, Ozawa, and Liu-Mo methods. The validity of kinetic models on the nonisothermal crystallization process of PBT and PBT/FVAR blends was discussed. All kinetic parameters showed that the “crystallization rate” followed the order: PBT > PBT/FVAR1 > PBT/FVAR3 > PBT/FVAR6 at a given cooling rate during experimental crystallization. However, when undercooling was taken into consideration, crystallization ability followed the order: PBT > PBT/FVAR6 > PBT/FVAR3 > PBT/FVAR1. A modified the Lauritzen–Hoffman equation was used to derive nucleation parameter (Kg) derived from nonisothermal crystallization. The results revealed that FVAR particles hindered the crystallization; however higher content of FVAR powders acted as heterogeneous nuclei in the nucleation stage to facilitated the crystallization of PBT. The dependence of the effective activation energy on conversion was evaluated on the basis of Friedman equation. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007

The design and evaluation of a multimodal ubiquitous learning application for EFL writers

Abstract: This study presents the design of a multimodal ubiquitous learning application (MULA) with different augmenting effects for enhancing English as a Foreign Language (EFL) academic writing instructio...

CD4 T-Cell-Independent Antibody Response Reduces Enterovirus 71 Lethality in Mice by Decreasing Tissue Viral Loads

Abstract: Enterovirus 71 (EV71) has induced fatal encephalitis in hundreds of thousands of infants and young children in the Asia-Pacific region since the past decade. Lymphocyte and antibody responses have been suspected to aggravate EV71-induced neurological symptoms, so anti-inflammatory agents have been used to treat patients with neurological symptoms. In the present study, we found that mice deficient in CD4(+) T cells were resistant to EV71 infection as wild-type mice, whereas mice deficient in B cells were highly susceptible to viral infection. Compensation of CD4 T-cell function by other immune cells was not likely, because wild-type mice depleted of CD4(+) T cells were also resistant to viral infection. Infected CD4 T-cell-deficient mice produced virus-specific neutralizing antibodies, IgM and IgG. Moreover, adoptive transfer of the virus-specific antibody produced by infected CD4 T-cell-deficient mice protected B-cell-deficient mice from infection by reducing tissue viral loads. Collectively, our results show that the CD4 T-cell-independent antibody response promotes the survival of EV71-infected mice and suggest great potential for the use of vaccines and neutralizing antibodies to reduce fatal symptoms in patients.

An improved E-DRM scheme for mobile environments

Abstract: With the rapid development of information science and network technology, Internet has become an important platform for the dissemination of digital content, which can be easily copied and distributed through the Internet. Although convenience is increased, it causes significant damage to authors of digital content. Digital rights management system (DRM system) is an access control system that is designed to protect digital content and ensure illegal users from maliciously spreading digital content. Enterprise Digital Rights Management system (E-DRM system) is a DRM system that prevents unauthorized users from stealing the enterprise's confidential data. User authentication is the most important method to ensure digital rights management. In order to verify the validity of user, the biometrics-based authentication protocol is widely used due to the biological characteristics of each user are unique. By using biometric identification, it can ensure the correctness of user identity. In addition, due to the popularity of mobile device and Internet, user can access digital content and network information at anytime and anywhere. Recently, Mishra et al. proposed an anonymous and secure biometric-based enterprise digital rights management system for mobile environment. Although biometrics-based authentication is used to prevent users from being forged, the anonymity of users and the preservation of digital content are not ensured in their proposed system. Therefore, in this paper, we will propose a more efficient and secure biometric-based enterprise digital rights management system with user anonymity for mobile environments.