检索结果-内蒙古大学图书馆

Synthesis and luminescence properties of novel ZnO nanostructures: micro and nanospheres, polyhedral cages, tetra-pods, needles, tipped nanorods, nanowires and other “microphone–shaped” structures

引用

MRS Online Proceedings Library 2005年第1期900卷 1-6页

作者： Aurangzeb Khan Wojciech M. Jadwisienczak Martin E Kordesch Department of Physics and Astronomy and CMSS Program Ohio University Athens USA School of Electrical Engineering and Computer Science Ohio University Athens USA

Novel ZnO nanostructures such as hollow nanospheres, nano-cages, nanoneedles, tetra-pods, nanowires, aligned nanorods and nanotubes are synthesized via thermal evaporation of ZnO and graphite powder mixtures in reduced oxygen atmosphere in the presence of argon and nitrogen flows. The ZnO nanostructures, especially nanospheres, have a unique shape and are hollow inside with walls densely decorated with aligned nanowires. Photoluminescence of synthesized ZnO structures measured at 300 K exhibits a strong near band edge peak at ∼380 nm and deep level green band centered at ∼550 nm. Fabricated ZnO structures can be studied for various applications in optoelectronics and sensors.

关键词： nanostructure luminescence semiconducting

来源：评论

学校读者我要写书评

暂无评论

Elementary science classroom learning with wireless response devices - Implementing active and experiential learning

Elementary science classroom learning with wireless response...

引用

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

来源：评论

学校读者我要写书评

暂无评论

Network management in new realms: Wireless sensor networks

引用

International Journal of Network Management 2005年第4期15卷 219-221页

作者： Boulis, Athanassios Jha, Sanjay School of Computer Science and Engineering University of New South Wales Sydney NSW 2052 Australia National ICT Australia Networks and Pervasive Computing Program Sydney NSW Australia School of Computer Science and Engineering University of New South Wales Sydney NSW Australia

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optical flow-based tracking of deformable objects using a non-prior training active feature model 5th

Optical flow-based tracking of deformable objects using a no...

引用

5th Pacific Rim Conference on Multimedia, PCM 2004

作者： Kim, Sangjin Kang, Jinyoung Shin, Jeongho Lee, Seongwon Paik, Joonki Kang, Sangkyu Abidi, Besma Abidi, Mongi Image Processing and Intelligent Systems Laboratory Department of Image Engineering Graduate School of Advanced Imaging Science Multimedia and Film Chung-Ang University 221 Huksuk-Dong Tongjak-Ku Seoul156-756 Korea Republic of Imaging Robotics and Intelligent Systems Laboratory Department of Electrical and Computer Engineering The University of Tennessee KnoxvilleTN37996-2100 United States

ISBN: (纸本)9783540239857

This paper presents a feature point tracking algorithm using optical flow under the non-prior training active feature model (NPT-AFM) framework. The proposed algorithm mainly focuses on analysis of deformable objects, and provides real-time, robust tracking. The proposed object tracking procedure can be divided into two steps: (i) optical flow-based tracking of feature points and (ii) NPT-AFM for robust tracking. In order to handle occlusion problems in object tracking, feature points inside an object are estimated instead of its shape boundary of the conventional active contour model (ACM) or active shape model (ASM), and are updated as an element of the training set for the AFM. The proposed NPT-AFM framework enables the tracking of occluded objects in complicated background. Experimental results show that the proposed NPT-AFM-based algorithm can track deformable objects in real-time. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Optical flows

来源：评论

学校读者我要写书评

暂无评论

Modeling of human driving behavior based on piecewise linear model

Modeling of human driving behavior based on piecewise linear...

引用

IEEE International Symposium on Industrial Electronics 2005, ISIE 2005

作者： Kim, Jong-Hae Okuma, Shigeru Kim, Young-Woo Hwang, Don-Ha Kim, Min-Huei Kim, Dong-Hee Dept. of Electrical Engineering and Computer Science Graduate School of Engineering Nagoya University Japan Space Robotics Research Center Toyota Technological Institute Nagoya City Japan Changwon Korea Republic of Dept. of Electrical and Automation Eng. Yeungnam College of Sci. and Tech. Daegu Korea Republic of Dept. of Electrical Engineering Yeungnam University Kyongsan Kyungbuk Korea Republic of

ISBN: (纸本)0780387384

This paper presents the development of the modeling strategy of the human driving behavior based on the expression as Piecewise Linear (PWL) model focusing on the driver's stopping maneuver. The driving data are collected by using the three-dimensional driving simulator based on CAVE, which provides stereoscopic immersive vision. In our modeling, the relationship between the driver's sensory information and the operation of the driver such as braking amount is expressed by PWL model, which is a class of Hybrid Dynamical System (HDS). The identification problem for the PWL model is formulated as the Mixed Integer Linear programming (MILP) by transforming the switching conditions into binary variables. From the obtained results, it is found that the driver appropriately switches the 'control low' according to the sensory information. These results enable us to capture not only the physical meaning of the driving skill, but also the decision-making aspect (switching conditions) in the driver's stopping maneuver. © 2005 IEEE.

关键词： Behavioral research

来源：评论

学校读者我要写书评

暂无评论

Annotation-based rescue assistance system for teleoperated unmanned helicopter with wearable augmented reality environment

Annotation-based rescue assistance system for teleoperated u...

引用

IEEE International Workshop on Safety, Security, and Rescue robotics (SSRR)

作者： M. Koeda Y. Matsumoto T. Ogasawara Collage of Information Science and Engineering Department of Human and Computer Intelligence Ritsumeikan University Kusatsu Shiga Japan Graduate School of Information Science Robotics Laboratory Nara Institute of Science and Technology Ikoma Nara Japan

We introduce an annotation-based rescue assistance system for a teleoperated unmanned helicopter with an wearable augmented reality (AR) environment. In this system, an operator controls the helicopter remotely while watching an annotated view from the helicopter through a head mounted display (HMD) with a laptop PC in a backpack. Virtual buildings and textual annotations assist the rescue operation indicating the position to search rapidly and intensively. The position and the attitude of the helicopter is measured by a GPS and a gyroscope, and sent to the operator's PC via a wireless LAN. Using this system, we conducted experiments to find persons and verified the feasibility.

关键词： Helicopters Augmented reality Control systems Gyroscopes Wireless LAN Global Positioning System Cameras Information science Intelligent robots Robot kinematics

来源：评论

学校读者我要写书评

暂无评论

Recognizing interaction from a robot's perspective

Recognizing interaction from a robot's perspective

引用

IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： T. Salter F. Michaud K. Dautenhahn D. Letourneau S. Caron LABORIUS-Research Laboratory on Mobile Robotics and Intelligent Systems Department of Electrical Engineering and Computer Engineering Université de Sherbrook Sherbrooke QUE Canada Adaptive Systems Research Group School of Computer Science University of Herfordshire Hatfield UK

For meaningful interaction between a robot and a human, an autonomous robot must recognize whether the experienced situation is created by people or by the environment. Using only proprioceptive data from a mobile robotic platform, we discover that it is possible to distinguish sensory data patterns involving interaction. These patterns are obtained whilst navigating varying environments, both human populated and unpopulated. The paper reports the initial set of trials using Roball, a spherical mobile robot. Also described is the experimental methodology currently followed to validate the hypothesis that child interaction can be perceived directly from navigation sensors onboard a robotic platform.

关键词： Robot sensing systems Mobile robots Human robot interaction Navigation Intelligent robots Sensor phenomena and characterization Infrared sensors Educational institutions Plastics Mobile computing

来源：评论

学校读者我要写书评

暂无评论

A layered scripting language technique for avatar behavior representation and control

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

Deadline spanning: a graph based approach

Deadline spanning: a graph based approach

引用

IEEE International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA)

作者： S.M. Petters School for Computer Science and Engineering University of New South Wales Sydney Australia Embedded Real-Time Operating Systems Program NICTA Sydney Australia

Microkernel based systems tend to depend heavily on IPC. This paper addresses the problem of a system response spanning more than one task in an embedded real-time system. The approach is based on a mix of classical response time analysis equations and a graph based approach to estimate the impact of different parts of the system on the time needed by the system to respond. This approach has the major advantage of being intuitive.

关键词： Delay Real time systems Yarn Kernel Operating systems computer science Differential equations Embedded system Australia Council Control systems

来源：评论

学校读者我要写书评

暂无评论

Comparing adaptation of constrained and unconstrained movements in three dimensions

Comparing adaptation of constrained and unconstrained moveme...

引用

IEEE International Conference on Rehabilitation robotics (ICORR)

作者： C. Scharver J. Patton R. Kenyon E. Kersten Sensory Motor Performance Program Rehabilitation Institute of Chicago Chicago IL USA Robotics Laboratory Rehabilitation Institute of Chicago Chicago IL USA Department of Computer Science University of Illinois Chicago IL USA Biomedical Engineering Graduate Program University of Wisconsin Madison WI USA

This paper describes targeted reaching experiments conducted using a new augmented reality system. Combining a large-workspace immersive virtual environment with physical force feedback, the system distorted subjects' movements using a viscous curl force field. Following previous experiments using a different robot, half the subjects were constrained to horizontal, planar movements. The remaining subjects performed unconstrained movements throughout the 3D workspace. Examining after-effects as an indication of learning, we found that constrained subjects learned the force field. However, it was difficult to detect whether the unconstrained subjects learned forces of identical magnitude. Our results found that force fields strengths eliciting constrained 2D adaptation have difficulty exhibiting after-effects for unconstrained 3D movements. The increased motor variability for 3D reaching movements requires consideration for future experimental design.

关键词： Rehabilitation robotics Robot sensing systems Nonlinear distortion Force feedback Displays Laboratories Augmented reality Virtual environment Design for experiments Haptic interfaces

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：