Browsing by Issue Date, starting with "2005-12-01"

Now showing 1 - 20 of 65657

An isolated Candida albicans TL3 capable of degrading phenol at large concentration
(2005-12-01)
Tsai, SC
;
Tsai, LD
;
Li, YK
;
應用化學系
;
應用化學系分子科學碩博班
An isolated yeast strain was grown aerobically on phenol as a sole carbon source up to 24 mm; the rate of degradation of phenol at 30 degrees C was greater than other microorganisms at the comparable phenol concentrations. This microorganism was further identified and is designated Candida albicans TL3. The catabolic activity of C. albicans TL3 for degradation of phenol was evaluated with the K-s and V-max values of 1.7 +/- 0.1 mm and 0.66 +/- 0.02 mu mol/min/mg of protein, respectively. With application of enzymatic, chromatographic and mass-spectrometric analyses, we confirmed that catechol and cis,cis-muconic acid were produced during the biodegradation of phenol performed by C. albicans TL3, indicating the occurrence of an ortho-fission pathway. The maximum activity of phenol hydroxylase and catechol-1,2-dioxygenase were induced when this strain grew in phenol culture media at 22 mm and 10 mm, respectively. In addition to phenol, C. albicans TL3 was effective in degrading formaldehyde, which is another major pollutant in waste water from a factory producing phenolic resin. The promising result from the bio-treatment of such factory effluent makes Candida albicans TL3 be a potentially useful strain for industrial application.
Airline flight frequency determination in response to competitive interactions using fuzzy logic
(2005-12-01)
Hsu, CI
;
Wen, YH
;
運輸與物流管理系註：原交通所+運管所
;
Department of Transportation and Logistics Management
This study determines the flight frequencies on an airline network in response to anticipated airline competitive interactions using fuzzy logic. It is expressed as an optimization problem to be solved in the medium-term airline network-planning phase, and it deals with tactical decisions made one season or one year in advance. The proposed model includes three submodels-an airline market share model, a flight-frequency programming model, and a fuzzy-logic-based competitive interaction model. Flight frequencies on an airline network with competitive interactions are analyzed by combining these three submodels. A case study, demonstrating the feasibility of applying the proposed model, confirms that the competitive interactions will converge. The results of this study confirm the accuracy of the proposed model and their flexibility of the decision-making involved in determining flight frequencies on an airline network in competitive and uncertain environments. (c) 2005 Elsevier Ltd. All rights reserved.
Under the shadow of Asian Brown Clouds: Unbalanced regional productivities in China and environmental concerns
(2005-12-01)
Hu, JL
;
Sheu, HJ
;
Lo, SF
;
管理科學系
;
經營管理研究所
China has seen rapid economic growth over the past two decades, but severe environmental problems have accompanied this, such as the looming danger of Asian Brown Clouds. This paper analyzes the regional development of China by examining economic performance and environmental factors. Technical efficiency and productivity changes in 31 regions of China are computed for the period 1997-2001. In the case of regional GDP, the fast-developing eastern (coastal) regions experience higher technical efficiency and productivity growth than the inland central and western regions. When environmental factors are incorporated, the eastern regions still perform better than inland regions, both from static and dynamic analysis. This phenomenon is termed the 'double deterioration' of the inland areas in China. Double deterioration is attributed to the lack of economic resources to replace highly-polluting production equipment and technology in those less developed regions.
~寄情漫ㄏㄨㄚˋ醫想世界~
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
以漫畫或卡通圖形式表達個人專業（學習）領域，能反應心情並可作品使觀賞者會心一笑產生認同感為佳。.....
Reduction of particle reentrainment using porous fence in front of dust samples
(2005-12-01)
Huang, CH
;
Lee, CI
;
Tsai, CJ
;
環境工程研究所
;
Institute of Environmental Engineering
Wind tunnel experiments were conducted to measure the emission factor of particle reentrainment from a dust sample with or without a porous fence. The effect of wind velocity, fence porosity, and distance between the fence and the dust sample on the emission factor was studied. A 20% porous fence was found to be effective for reducing the particle reentrainment at a low wind velocity of 5 m/s. When the wind velocity was increase from 7 to 15 m/s, the results show that the particle reentrainment can also be reduced in a certain region behind the fence (x/H<4, x=distance between fence and sample; H=fence height) for the 20% porous fence. A linear multivariable regression model was fitted to the logarithmically transformed experimental data. The good fit of the regression model makes it possible to estimate emission rate as a function of the dimensionless distance (x/H), the wind velocity, and the elapsed time.
Oxide-trap-enhanced Coulomb energy in a metal-oxide-semiconductor system
(2005-12-01)
Lu, MP
;
Chen, MJ
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
Coulomb energy is essential to the charging of a nanometer-scale trap in the oxide of a metal-oxide-semiconductor system. Traditionally the Coulomb energy calculation was performed on the basis of an interfacelike trap. In this paper, we present experimental evidence from a 1.7-nm oxide: Substantial enhancements in Coulomb energy due to the existence of a deeper trap in the oxide. Other corroborating evidence is achieved on a multiphonon theory, which can adequately elucidate the measured capture and emission kinetics. The corresponding configuration coordinate diagrams are established. We further elaborate on the clarification of the Coulomb energy and differentiate it from that in memories containing nanocrystals or quantum dots in the oxide. Some critical issues encountered in the work are addressed as well.
諾貝爾生理醫學獎得主Phillip A. Sharp博士蒞校訪問
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
諾貝爾生理醫學獎得主Phillip A. Sharp博士，於11月15日蒞校訪問，並在行政大樓二樓接待室，與校長及徐明達副校長、許萬枝教務長、林奇宏副研發長面會。
子宮頸抹片檢查骨密度檢查
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
衛保組於11月17日，在護理館4樓 414教室舉辦子宮頸抹片與骨密度檢查，希望提供全校教職人員一個健康無憂的工作環境。
2,8-Bis(3-phenylquinoxalin-2-yl)-5 lambda(6)-dibenzo[b,d] thiophene-5,5-dione
(2005-12-01)
Huang, TH
;
Whang, WT
;
Wen, YS
;
Lin, JT
;
材料科學與工程學系
The bond lengths and angles in the title compound, C40H24N4O2S, are normal. The dihedral angles between the dibenzothiophene-S,S-dioxide and two quinoxaline groups are 34.88 (1) and 45.86 (1)degrees.
由表演工作坊飆向陽明
(國立陽明大學, 2005-12-01)
錢玨琄
;
陳婉華
時間：2005年11月18日（五）中午12:00-14:00 地點：二教樓二樓222教室主講：丁乃箏.....
生物藥學研究所專題演講
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
講題：Telomeres and telomerase: lessons from an atypical budding yeast 主講：Neal Fan-Nan Lue, M.D., Ph. D. Cornell University, Weill Medical College 時間：94年12月6日（星期二）15:30 地點：傳醫大樓乙棟一樓階梯教室
專利分析與分析工具研習課程
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
圖書館訂於11月28日中午12:10~13:20舉辦一場「專利分析與分析工具研習課程」，歡迎報名參加。...
An approach for seamless handoff among mobile WLAN/GPRS integrated networks
(2005-12-01)
Jan, RH
;
Chiu, WY
;
資訊工程學系
;
Department of Computer Science
Wireless local area networks (WLAN) and General Packet Ratio Service (GPRS) networks are two of the most widely used wireless network systems. In this paper, we propose a mobility support for mobile host roaming between WLAN and GPRS networks. In addition, a handoff decision model is presented to reduce the latency of the handoff procedure. The experimental results, including throughput, packet delay and handoff latency are given to show the performance of our approach. (c) 2005 Elsevier B.V. All rights reserved.
Topology-aided cross-layer fast handoff designs for IEEE 802.11/Mobile IP environments
(2005-12-01)
Tseng, CC
;
Yen, LH
;
Chang, HH
;
Hsu, KC
;
交大名義發表
This study first reviews state-of-the-art fast handoff techniques for IEEE 802.11 or Mobile IP networks. Based on that review, topology-aided cross-layer fast handoff designs are proposed for Mobile IP over IEEE 802.11 networks. Time-sensitive applications, such as voice over IP (VoIP), cannot tolerate the long layer-2. plus layer-3 handoff delays that arise in IEEE 802.11/Mobile IP environments. Cross-layer designs are increasingly adopted to shorten the handoff latency time. Handoff-related layer-2 triggers may reduce the delay between layer-2 handoff completion and the associated layer-3 handoff activation. Cross-layer topology information, such as the association between 802.11 access points and Mobile IP mobility agents, together with layer-2 triggers, can be utilized by a mobile node to start layer-3 handoff-related activities, such as agent discovery, address configuration, and registration, in parallel with or prior to those of layer-2 handoff. Experimental results indicate that the whole handoff delay can meet the delay requirement of VoIP applications when layer-3 handoff activities occur prior to layer-2 handoffs.
A novel Mach-Zehnder interferometer based on dual-ARROW structures for sensing applications
(2005-12-01)
Hsu, SH
;
Huang, YT
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
A novel Mach-Zehnder interferometer (MZI) based on dual antiresonant reflecting optical waveguides (ARROWs) for sensing is proposed. By adjusting the degree of structural symmetry to control the coupling behavior of the dual ARROW, an interferometric sensor without any bending structure can be realized. Operating principles and simulation characteristics of the device are discussed in detail. The refractive-index detection limit of the order of 10(-5) is achieved.
Connect6
(2005-12-01)
Wu, IC
;
Huang, DY
;
Chang, HC
;
資訊工程學系
;
Department of Computer Science
This note introduces the game Connect6, a member of the family of the k-in-a-row games, and investigates some related issues. We analyze the fairness of Connect6 and show that Connect6 is potentially fair. Then we describe other characteristics of Connect6, e.g., the high game-tree and state-space complexities. Thereafter we present some threat-based winning strategies for Connect6 players or programs. Finally, the note describes the current developments of Connect6 and lists five new challenges.
HANet: a framework toward ultimately reliable network services
(2005-12-01)
Jiang, YJ
;
Chang, DW
;
Chang, RC
;
資訊工程學系
;
Department of Computer Science
High availability is becoming an essential part of network services because even a little downtime may lead to a great loss of money. According to previous research, network failure is one of the major causes of system unavailability. In this paper, we propose a framework called HANet for building highly available network services. The main goal of HANet is to allow a server to continue providing services when all its network interfaces to the outside world (i.e., public interfaces) have failed. This is achieved by two techniques. First, a network interface can be backed up not only by other public network interfaces, but also by other inter-server I/O communication interfaces (i.e., private interfaces) such as Ethernet, USB, RS232, etc. Therefore, IP packets can still be transmitted and received via these I/O links, even when all of the public network interfaces have failed. Second, HANet allows a server to take over the packet transmission job of another network-failed server. The benefit of HANet is that a network-failed server will not lose any requests which are being processed. And, it is efficient since no synchronization overhead or replaying process is required. Moreover, it is totally transparent to server applications and clients. To demonstrate the feasibility of HANet, we implemented it in the Linux kernel. According to the performance results, using a private Fast Ethernet interface for data communication leads to only 1% overhead in user-perceived latency when the public Fast Ethernet interface of the server has failed. This indicates that HANet is efficient, and hence is feasible for commercial network services. (c) 2004 Elsevier Inc. All rights reserved.
Lasting effects of instruction guided by the conflict map: Experimental study of learning about the causes of the seasons
(2005-12-01)
Tsai, CC
;
Chang, CY
;
教育研究所
;
師資培育中心
;
Institute of Education
This study was based on the framework of the "conflict map" to facilitate student conceptual learning about causes of the seasons. Instruction guided by the conflict map emphasizes not only the use of discrepant events, but also the resolution of conflict between students' alternative conceptions and scientific conceptions, using critical events or explanations and relevant perceptions and conceptions that explicate the scientific conceptions. Two ninth grade science classes in Taiwan participated in this quasi-experi mental study in which one class was assigned to a traditional teaching group and the other class was assigned to a conflict map instruction treatment. Students' ideas were gathered through three interviews: the first was conducted I week after the instruction; the second 2 months afterward; and the third at 8 months after the treatment. Through an analysis of students' interview responses, it was revealed that many students, even after instruction, had a common alternative conception that seasons were determined by the earth's distance to the sun. However, the instruction guided by the framework of the conflict map was shown to be a potential way of changing the alternative conception and acquiring scientific understandings, especially in light of long-term observations. A detailed analysis of students' ideas across the interviews also strongly suggests that researchers as well as practicing teachers need to pay particular attention to those students who can simply recall the scientific fact without deep thinking, as these students may learn science through rote memorization and soon regress to alternative conceptions after science instruction. (c) 2005 Wiley Periodicals, Inc.
Wavelet tree classification and hybrid coding for image compression
(2005-12-01)
Su, CK
;
Hsin, HC
;
Lin, SF
;
電控工程研究所
;
Institute of Electrical and Control Engineering
A hybrid coding system that uses a combination of set partition in hierarchical trees (SPIHT) and vector quantisation (VQ) for image compression is presented. Here, the wavelet coefficients of the input image are rearranged to form the wavelet trees that are composed of the corresponding wavelet coefficients from all the subbands of the same orientation. A simple tree classifier has been proposed to group wavelet trees into two classes based on the amplitude distribution. Each class of wavelet trees is encoded using an appropriate procedure, specifically either SPIHT or VQ. Experimental results show that advantages obtained by combining the superior coding performance of VQ and efficient cross-subband prediction of SPIHT are appreciable for the compression task, especially for natural images with large portions of textures. For example, the proposed hybrid coding outperforms SPIHT by 0.38 dB in PSNR at 0.5 bpp for the Bridge image, and by 0.74 dB at 0.5 bpp for the Mandrill image.
陽明大學第三十一屆運動會
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
本校第三十一屆運動會，於11月23日舉行，當天雖然陰雨綿綿，但仍不掩選手的熱情活力，各系級不畏風雨，依序進場，並由主席徐明達副校長揮手向繞場選手致意。