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IEEE International Workshop on Wireless and Mobile Technologies in Education, WMTE 2005

作者： Chen, Yu-Fen Liu, Chen-Chung Yu, Ming-Hung Chang, Sung-Bin Lu, Yun-Chen Chan, Tak-Wai Dept. of Computer Science Information Engineering National Central University Taiwan Graduate Institute of Network Learning Technology National Central University Taiwan Degree Program of E-Learning College of Science National Chiao Tung University Taiwan Chu-Wei Elementary School Taiwan

ISBN: (纸本)0769523854

Active learning enables learners to actively engage in learning. Learning not only transfers material to students for learning, but also encourages greater mental engagement and more extensive student-student and student-instructor interaction than does a typical lecture class. Peer Instruction (PI) engages students in active learning by achieving continuous instructor-student interaction in a physics lecture. However, the methodologies and the effectiveness of implementing PI for elementary school students have seldom been clarified. This study explores the possibility of adopting PI in an elementary science classroom. The research considerations of the study are as follows: (1) how wireless technology can enhance PI in elementary science classroom;(2) how a teacher can engage students in pre-class reading, and (3) whether elementary school students have sufficient social skills to perform a PI discussion? These questions are examined by observing how the PI pedagogical model worked with a wireless response system in elementary science classroom. Based on the observation, this study also proposes a way of improving the PI learning experience of elementary school students by adding experiments and observations during peer discussion to explain concepts and phenomena in physics. © 2005 IEEE.

关键词： Learning systems

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STCP: a generic transport layer protocol for wireless sensor networks

STCP: a generic transport layer protocol for wireless sensor...

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International Conference on computer Communications and Networks (ICCCN)

作者： Y.G. Iyer S. Gandham S. Venkatesan Telecommunications Engineering Program University of Technology Dallas USA Department of Computer Science University of Technology Dallas USA

We consider the issue of designing a generic transport layer protocol for energy-constrained sensor networks. We present the requirements for such a transport protocol and propose sensor transmission control protocol (STCP). STCP is a generic, scalable and reliable transport layer protocol where a majority of the functionalities are implemented at the base station. STCP offers controlled variable reliability, congestion detection and avoidance, and supports multiple applications in the same network. We present the design and implementation of STCP and evaluate the protocol with different scenarios and network characteristics.

关键词： Transport protocols Wireless application protocol Wireless sensor networks Base stations Sensor phenomena and characterization Temperature sensors computer networks computer science Media Access Protocol Delay

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Separation of fricatives and affricates

Separation of fricatives and affricates

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2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05

作者： Hu, Guoning Wang, DeLiang Biophysics Program Ohio State University 395 Dreese Lab. 2015 Neil Ave. Columbus OH 43210 United States Department of Computer Science and Engineering Center of Cognitive Science Ohio State University 2015 Neil Ave. Columbus OH 43210 United States

ISBN: (纸本)0780388747

Separating speech from acoustic interference is a very challenging task. In particular, no system successfully addresses the separation of unvoiced speech. Fricatives and affricates are two main categories of consonants that contain a significant amount of unvoiced signal. We propose a novel system that separates fricatives and affricates from non-speech interference. The system first decomposes the input mixture into segments, each of which contains signal mainly from one source. Then it detects segments dominated by unvoiced portions of fricatives and affricates with a feature-based Bayesian classifier, and groups these segments with voiced speech separated by a previous system. The proposed system is evaluated with various types of interference and produces promising results. © 2005 IEEE.

关键词： Speech recognition

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Multi-section freshman classes with laboratories: Lecture as intro vs. lecture as wrap-up

Multi-section freshman classes with laboratories: Lecture as...

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2005 ASEE Annual Conference and Exposition: The Changing Landscape of engineering and Technology Education in a Global World

作者： Sticklen, Jon Urban-Lurain, Mark Hinds, Timothy Eskil, Taner Amey, Marilyn Michigan State University United States Department of Computer Science and Engineering Michigan State University United States Instructional Technolgy Research and Development Division of Science and Mathematics Education Michigan State University United States MSU Mechanical Engineering Department Department of Educational Administration Higher Adult and Lifelong Education Program Michigan State University United States

An instructional model for Freshman class with laboratories was discussed. The instructional model introduces material of a given unit while laboratory sections are used to provide hands on detailed experience with applying knowledge in assigned readings and lecture. The lecture in the plays the role of wrap up for the unit students including making generalizations. It is suggested that 'lecture as wrap up' should require students to take more responsibility for their own learning, and in the end be more actively engaged in their learning than the 'lecture as introduction' path.

关键词： Laboratories

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The Semantic Web approach in location based services

The Semantic Web approach in location based services

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International Conference on Computational science and Its Applications - ICCSA 2005

作者： Kim, Jong-Woo Kim, Ju-Yeon Hwang, Hyun-Suk Park, Sung-Seok Kim, Chang-Soo Park, Sung-Gi Pukyong National University Interdisciplinary Program of Information Security Korea Republic of Pukyong National University Institute of Engineering Research Korea Republic of Pukyong National University Dept. of Computer Science Korea Republic of JC System Inc. Korea Republic of

In recent years, there has been growing interest in Location Based Service (LBS). However, the existing LBS has some limitations in the management of dynamic location-dependent contents and interoperability between the different platforms and various domains. We have focused on how LBS applications obtain integrated, dynamic, and sensitive contents on the different domains. We approach the Semantic Web technologies to resolve these issues. In this paper, we design the architecture to combine the Semantic Web technologies with the LBS and implement the prototype to describe the Semantic LBS. © Springer-Verlag Berlin Heidelberg 2005.

关键词： World Wide Web

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Curricular integration of computational tools: A first step

Curricular integration of computational tools: A first step

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2005 ASEE Annual Conference and Exposition: The Changing Landscape of engineering and Technology Education in a Global World

作者： Hinds, Timothy Urban-Lurain, Mark Sticklen, Jon Amey, Marilyn Eskil, Taner Michigan State University United States Michigan State University Department of Mechanical Engineering United States Instructional Technology Research and Development Division of Science and Mathematics Education Michigan State University United States Department of Computer Science and Engineering Michigan State University United States Department of Educational Administration Higher Adult and Lifelong Education Program MSU United States

A pair of initial studies using an evolutionary approach to curricular reform that capitalize on the strength of both the top-down and bottom-up model, and was built on the science, technology, engineering and mathematics (STEM) reform literature are performed. This approach develop a pairwise linkage among strategic courses in the engineering curricula to promote curricular integration. The results of trial produced higher course grades in both course grades in both courses, though the change was most significant for the mechanical engineering course. Full evaluation of the project cannot be obtained until the study is continued to include statics students who also participated when they were enrolled in the computer science course.

关键词： Curricula

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Transistor characteristics of thermal chemical vapor deposition carbon nanotubes field emission triode

Journal of Vacuum Science & Technology B: Microelectronics a...

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Journal of Vacuum science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena 2005年第2期23卷 868-873页

作者： Y. M. Wong W. P. Kang J. L. Davidson W. Hofmeister S. Wei J. H. Huang Department of Electrical Engineering and Computer Science Vanderbilt University Nashville Tennessee 37235 Interdisciplinary Graduate Program in Material Science Vanderbilt University Nashville Tennessee 37235 Department of Materials Science and Engineering National Tsing Hua University Hsinchu 300 Taiwan Republic of China

A study of thermal chemical vapor deposition (CVD) grown carbon nanotubes (CNTs) field emitters in a triode amplifier configuration is reported. The CNT transistor characteristics were examined by integrating gate and anode with CNT cathode in two structural forms, utilizing a TEM grid (transmission electron microscope specimen holder) as the gate electrode and a micropatterned CNT with self-aligned gate. The TEM-grid CNT triode displayed clearly gate-controlled current modulation behavior with distinct cutoff, linear, and saturation regions, and a reasonable gate turn-on field of ∼5.4V∕μm despite a large cathode-gate spacing of ∼120μm . The field emission result established the basic transistor characteristics of CNTs in a triode configuration. A CNT triode construct with a self-aligned gated fabrication technique was also developed to realize a monolithic triode structure with shorter gate-cathode spacing, lowering gate voltage, and enhancing emission current. The triode exhibited a significantly lower gate turn-on voltage of ∼40V , and gate-controlled modulation of the emission current. An anode current density of ∼30mA∕cm2 was achieved at a gate voltage of ∼80V and an anode voltage of ∼200V . The dc characteristics for both of the CNT triodes were investigated, including Ia versus Va for different Vg . Moreover, dc parameters such as transconductance, amplification factors, and anode resistance of the triode amplifier were determined. The CNT triodes exhibited useful amplification factor and high output impedance.

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Analysis and evaluation of a new MAC protocol for broadband wireless access

Analysis and evaluation of a new MAC protocol for broadband ...

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International Conference on Wireless Networks, Communications and Mobile Computing

作者： L.F.M. de Moraes P.D. Maciel Systems Engineering and Computer Science Program-COPPE/UFRJ High-Speed Networks Laboratory-RAVEL Rio de Janeiro Brazil

Broadband wireless access (BWA) systems offer a solution for broadband access and high data rate transmission of multimedia services with distinct quality-of-service (QoS) requirements through a wireless medium, IEEE 802.16 standard specifies the PHY and MAC layers for BWA systems. However, in spite of including the possibility for QoS support, the standard does not define how to schedule different types of traffic. This article propose a new MAC protocol for BWA systems that incorporates a traffic scheduling mechanism based on messages and/or stations priorities. An analytical model to evaluate the performance of the proposed protocol is also developed and results obtained for the messages waiting times of different traffic classes are presented.

关键词： Media Access Protocol Wireless application protocol Access protocols Traffic control Physical layer Proposals Quality of service Analytical models Scheduling Access control

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Wireless hearing aid system simulations using advanced design system™: A behavioral modeling approach

Wireless hearing aid system simulations using advanced desig...

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2005 27th Annual International Conference of the engineering in Medicine and Biology Society, IEEE-EMBS 2005

作者： Rana, Ram Singh Tang, Bin Zhang, Liang Krishna, Garg Hari Wang, Yun Institute of Microelectronics Singapore Science Park II 11 Science Park Road Singapore 117685 Singapore Graduate Program in Bioengineering National University of Singapore Singapore 117597 Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore 119260 Singapore Department of Otolaryngology Faculty of Medicine National University of Singapore Singapore 119074 Singapore

ISBN: (纸本)0780387406

The stringent requirements on size and power consumption constrain the conventional hearing aid devices from providing the patients an economic and user friendly solution, specifically for better noise cancellation. With the advancements in technologies such as integrated circuits design, wireless communications and digital signal processing techniques, the wireless hearing aids having multi-microphones, analog, digital and mixed signals and radio frequency signals processing circuits, DSP and programmable units seem to be promising to provide enhanced performance. The focus of this paper is about the system simulation of a typical wireless hearing aid using Agilent Advanced Design System™. The behavioral modeling features are exploited to enable the whole system simulations including electro-acoustic transducers. A few system level simulation results are included. © 2005 IEEE.

关键词： Hearing aids

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A layered scripting language technique for avatar behavior representation and control

A layered scripting language technique for avatar behavior r...

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13th International Conference on AIS 2004

作者： Kim, Jae-Kyung Sohn, Won-Sung Cho, Beom-Joon Lim, Soon-Bum Choy, Yoon-Chul Dept. of Computer Science Yonsei University Shinchon-dong Seodaemun-gu 120-749 Seoul Korea Republic of Computational Design Program School of Architecture Carnegie Mellon University Pittsburgh PA 15213 United States Department of Computer Engineering Chosun University Kwangju Korea Republic of Department of Multimedia Science Sookmyung Women's University Chungpa-dong Yongsan-gu 140-742 Seoul Korea Republic of

The paper proposes a layered scripting language technique for representation and control of avatar behavior for simpler avatar control in various domain environments. We suggest three layered architecture which is consisted of task-level behavior, high-level motion, and primitive motion script language. These layers brides gap between application domain and implementation environments, so that end user can control the avatar through easy and simple task-level scripting language without concerning low-level animation and the script can be applied various implementations regardless of application domain types. Our goal is to support flexible and extensible representation and control of avatar behavior by layered approach separating application domains and implementation tools. © Springer-Verlag Berlin Heidelberg 2005.

关键词： computer programming languages

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