Browsing by Issue Date, starting with "2006-03-07"

Now showing 1 - 20 of 63546

Optical monitoring apparatus for use in wavelength division multiplexing network
(2006-03-07)
Chi
;
Sien
;
Lee
;
Chien-Chung
;
Yeh
An optical monitoring apparatus based on the scanning of the gain profile of erbium-doped fiber amplifiers (EDFA) and applied in a wavelength division multiplexing network has been proposed and experimentally demonstrated. The EDFA with an injected saturated tone can provide variable gain or loss profile by controlling the pump power. The components used in the present optical monitoring apparatus for use in a wavelength division multiplexing network are easily available and cost-effective, valuable for monitoring frequency and power of a WDM optical communication system, and capable of greatly enhancing resolution of monitoring frequency spectrum for the optical fiber network system.
Neuroimmunological evidence and enzymatic characterization of a novel dehydroepiandrosterone sulfotransferase in Drosophila brain
(2006-03-07)
Liu, TA
;
Yang, YS
;
生物科技學系
;
Department of Biological Science and Technology
beta-lactoglobulin plays a provocative role in lymphocyte proliferation
(2006-03-07)
Chen, WL
;
Liu, WT
;
Ko, LP
;
Mao, SJT
;
生物科技學系
Nano-surgery on cancer cells by protein-nanodiamond complex.
(2006-03-07)
Chang, CC
;
Chao, JI
;
Sun, KW
;
Cheng, CL
;
生物科技學系
Rearrangebility of bit permutation networks
(2006-03-07)
Bao, XW
;
Hwang, FK
;
Li, Q
;
應用數學系
;
Department of Applied Mathematics
In this paper, we introduce the concept of routing grid as a tool for analyzing realizability of permutations on bit permutation networks (BPNs). We extend a result by Linial and Tarsi which characterizes permutations realizable on shuffle-exchange networks to any BPNs. A necessary condition for a BPN to be rearrangeable is given, and the rearrangeability of two families of BPNs are explored. Finally, we present a method which may help to tackle one kind of balanced matrix problems whose solution implies an answer to Benes conjecture. Hopefully, our treatment brings some new insight into the problem of permutation routing. (c) 2005 Elsevier B.V. All rights reserved.
Wide-sense nonblocking for multi-log(d) N networks under various routing strategies
(2006-03-07)
Chang, FH
;
Guo, JY
;
Hwang, FK
;
應用數學系
;
Department of Applied Mathematics
Chang et al. showed that the number of middle switches required for WSNB under strategies: save the unused, packing, minimum index, cyclic dynamic, and cyclic static, for the 3-stage Clos network C(n, m, r) with r >= 3 is the same as required for SNB. In this paper, we prove the same conclusion for the multi-log(d) N network. We also extend our results, except for the minimum index strategy, to a general class of networks including the 3-stage Clos network and the multi-log(d) N network as special cases. (c) 2005 Elsevier B.V. All rights reserved.
Cloning and expression of human haptoglobin subunits in Escherichia coli: The potential use of mini-haptoglobin as an antioxidant
(2006-03-07)
Lai, IH
;
Tsai, TI
;
Lai, WY
;
Lin, HH
;
Mao, SJT
Development and implementation of cross-talk cancellation system in spatial audio reproduction based on subband filtering
(2006-03-07)
Bai, MSR
;
Lee, CC
;
機械工程學系
;
Department of Mechanical Engineering
An integrated spatial audio system based on subband filtering and a panel speaker array is developed in this paper. This system is intended for a personal computer and is capable of rendering sound images positioned arbitrarily around a listener, synchronizing with the video image. The proposed system features the spatial audio technologies such as the head-related transfer function (HRTF), the reverberator, and the cross-talk cancellation system (CCS). Of particular importance in this paper is that inverse filtering with Tikhonov regularization technique is employed in designing the multi-channel filters to cancel the crosstalks. To ease the computation loading, the CCS is implemented for frequencies below 5.5 kHz by using a subband filtering approach. The system is implemented on a 5 x I panel speaker array. Experimental investigation indicated that the proposed system is effective in creating an immersive sound field, in complement with video rendering. (c) 2005 Elsevier Ltd. All rights reserved.
Method of manufacturing aluminum oxide film with arrayed nanometric pores
(2006-03-09)
Chao, Chuen-Guang
;
Chen, Chien-Chon
;
Chen, Jung-Hsuan
;
Kuo, Chin-Guo
The present invention pertains to a method of manufacturing an aluminum oxide film with arrayed nanometric pores, wherein a commercial aluminum substrate is provided firstly; then the aluminum substrate is annealed and then electro-polished in order to have a mirror-like surface, and then anodized in order to form a aluminum oxide film with a plurality of nanometric pores, which are aligned in array, and then annealed in order that an oxidation reaction can happen thereon and generates oxide, which via self-diffusion, fills some of smaller pores with the pores size being uniformed; lastly a pore-widening is undertaken in order to increase the diameters of the pores. The present invention can accomplish the nanometric pores aligned in array and with an uniform pore diameter, and simultaneously have the advantages of simplified manufacturing process, easier operational control and reduced cost.
Charge-orbital ordering and verwey transition in magnetite measured by resonant soft X-ray scattering
(2006-03-10)
Huang, DJ
;
Lin, HJ
;
Okamoto, J
;
Chao, KS
;
Jeng, HT
We report experimental evidence for the charge-orbital ordering in magnetite below the Verwey transition temperature T-V. Measurements of O K-edge resonant x-ray scattering on magnetite reveal that the O 2p states in the vicinity of the Fermi level exhibit a charge-orbital ordering along the c axis with a spatial periodicity of the doubled lattice parameter of the undistorted cubic phase. Such a charge-orbital ordering vanishes abruptly above T-V and exhibits a thermal hysteresis, correlating closely with the Verwey transition in magnetite.
Study in IC chip failure during pick-up process by using experimental and finite element methods
(2006-03-10)
Cheng, TH
;
Du, CC
;
Tseng, CH
;
機械工程學系
;
Department of Mechanical Engineering
Stress contours of an IC chip and the displacement contours of the adhesive between an IC chip and blue tape in the pick-up integrated circuit (IC) chip process are obtained using experimental and finite element methods. The physical and mechanical properties of the material used in FEM are determined by pre-experimental tests. Some factors that importantly influence the failure of a pick-up IC chip during the pick-up IC chip process are proposed. The pre-expermiental material properties are manifest in the practical behavior of material, so the post-experimental results are approximately consistent with the FEM results. Post-expermients further demonstrated that the findings of this study can be used to increase the success rate of the pick-up IC chip process. (c) 2005 Elsevier B.V. All rights reserved.
高效率頭相關轉換函數合成運算方法
(2006-03-11)
白明憲
;
黃嘉文
本發明係提出一種高效率頭相關轉換函數(HRTF)合成運算方法，其係應用頭相關轉換函數對於聲源信號進行空間之定位，並為解決習知以摺積運算需佔用大量資源，而造成在處理上效率較差之困擾，係將頭相關轉換函數中的空間資料矩陣以一奇異值分解法將資料進行分解並降階處理，以減少需運算之資料量，並為能得到高精準的音源定位，係以內插方式計算求得所需空間定位資訊。此發明以其高速度之運算效能與模擬全方位空間資訊之能力，更能實現將目標音源產生連續移動音像的效果。
Formation of silicon germanium nitride layer with distributed charge storage elements
(2006-03-13)
Tu, CH
;
Chang, TC
;
Liu, PT
;
Liu, HC
;
Chen, WR
The formation of silicon germanium nitride (SiGeN) with distributed charge storage elements is proposed in this work. A large memory window is observed due to the retainable dangling bonds inside the SiGeN gate stack layer. The nonvolatile memory device with the high-temperature oxidized SiGeN stack layer exhibits 2 V threshold voltage shift under 7 V write operation, which is sufficient for a memory device to define the signal "0" and "1." Also, the manufacture technology using the sequent high-temperature oxidation of the a-Si layer acting as the blocking oxide is proposed to enhance the performance of nonvolatile memory devices. (c) 2006 American Institute of Physics.
Anomalous electrical performance of nanoscaled interfacial oxides for bonded n-GaAs wafers
(2006-03-13)
Hao, OY
;
Wu, YCS
;
Chiou, HH
;
Liu, CC
;
Cheng, JH
Electrical performance was found to be closely related to the variation of nanosized interface morphology in previous studies. This work investigated in detail the microstructural development of in- and anti-phase bonded interfaces for n-type (100) GaAs wafers treated at 500, 600, 700 and 850 degrees C. The interfacial energy of anti-phase bonding is higher than that of in-phase bonding based on the first-principles calculations. The higher interface energy tends to stabilize the interfacial oxide layer. The continuous interfacial oxide layer observed below 700 degrees C can deteriorate the electrical property due to its insulating property. However, the existence of nanoscaled oxide at anti-phase bonded interfaces can improve the electrical conductivity at 700 degrees C. This is due to the suppression of the evaporation of As atom by the interfacial nanoscaled oxides based on the analysis of autocorrelation function and energy dispersive x-ray spectroscopy. (c) 2006 American Institute of Physics.
Luminescence of selective area growth of epitaxial ZnO nanowires and random-growth-oriented nanobelts
(2006-03-14)
Hsu, HC
;
Cheng, HM
;
Wu, CY
;
Huang, HS
;
Lee, YC
Epitaxial ZnO nanowires and random-growth-oriented nanobelts were grown on c-plane sapphire with and without a pre-coated ZnO epilayer film. On the pre-coated ZnO epilayer, ZnO nanowires are vertically aligned with good in-plane alignment as a result of homoepitaxy, whereas on the bare c-plane sapphire, besides a few nanowires vertically aligned with [0001]znO parallel to [0001](Al2O3), the nanowires were properly aligned with three-fold rotation symmetry. The ZnO nanowires are well-defined hexagonal crystals with diameters of 70-500 nm and lengths of up to several micrometres. In the junction regions between the pre-coated epilayer and the bare sapphire surface, however, ZnO nanobelts (nanoribbons) were found. Cathodoluminescence measurements revealed that the emission at 3.26 eV is correlated with free-exciton recombination and the broad green emission at 2.48 eV is attributed to surface defects. The stronger green emission implies that more surface defects exist on the side walls of nanowires and nanobelts. In Raman scattering, the E1 (LO) mode is sensitive to the orientation of nanostructure that is consistent with the cathodoluminescence results.
管管作品五首
(2006-03-15)
管管
Generation of frequency tunable polarization entangled photon pairs
(2006-03-15)
Yabushita, A
;
Kobayashi, T
;
電子物理學系
;
Department of Electrophysics
Photon pairs with correlated frequencies from an optical parametric system were generated by a continuous wave pump focused on a type-II nonlinear crystal with polarization entanglement. The polarization entanglement of the frequency resolved photons was measured under several typical configurations. By optimizing a condition, the degree of polarization entanglement was improved substantially. We proposed the application of the system, which can be used as a light source of wavelength division multiplexing quantum key distribution, optimizing the configuration of the photon-pair generation. (c) 2006 American Institute of Physics.
Two-stage genetic programming (2SGP) for the credit scoring model
(2006-03-15)
Huang, JJ
;
Tzeng, GH
;
Ong, CS
;
運輸與物流管理系註：原交通所+運管所
;
科技管理研究所
Credit scoring models have been widely studied in the areas of statistics, machine learning, and artificial intelligence (AI). Many novel approaches such as artificial neural networks (ANNs), rough sets, or decision trees have been proposed to increase the accuracy of credit scoring models. Since an improvement in accuracy of a fraction of a percent might translate into significant savings, a more sophisticated model should be proposed for significantly improving the accuracy of the credit scoring models. In this paper, two-stage genetic programming (2SGP) is proposed to deal with the credit scoring problem by incorporating the advantages of the IF-THEN rules and the discriminant function. On the basis of the numerical results, we can conclude that 2SGP can provide the better accuracy than other models. (c) 2005 Published by Elsevier Inc.
Anti-inflammatory effect of Lactobacillus casei on Shigella-infected human intestinal epithelial cells. (vol 176, pg 1228, 2006)
(2006-03-15)
Tien, M. -T.
;
Girardin, S. E.
;
Regnault, B.
;
Le Bourhis, L.
;
Dillies, M. -A.
管管作品五首
(2006-03-15)
管管