Search results for author:"Y Lee"
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Throughput Analysis Model for IEEE 802.11e EDCA with Multiple Access Categories
Y. Lee
Journal of Applied Research and Technology Vol. 11, No. 4 (August 2013) pp. 612–621
IEEE 802.11e standard has been specified to support differentiated quality of service (QoS), one of the critical issues on the conventional IEEE 802.11 wireless local area networks (WLANs). Enhanced Distributed Channel Access (EDCA) is the...
Language: English
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Teaching the Meaning of Statistical Techniques with Microcomputer Simulation
Motoko Y. Lee
Students in an introductory statistics course are often preoccupied with learning the computational routines of specific summary statistics and thereby fail to develop an understanding of the meaning of those statistics or their conceptual basis. To ...
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Media Education: Definitions, Approaches and Development around the Globe
Alice Y. L. Lee
New Horizons in Education Vol. 58, No. 3 (December 2010) pp. 1–13
Background: Media education is the study of the media with the aim of cultivating people's media literacy. In the past four decades, media education has rapidly developed in school systems and communities all over the world. Each country has its own ...
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DATABASE-DRIVEN WEB APPLICATIONS FOR TEACHING & LEARNING
Daniel Y. Lee
EdMedia + Innovate Learning 1999 (1999) pp. 1816–1818
Although many instructors now utilize the Web to supplement their courses, the Web pages they create are mostly "static" in nature. These HTML documents are written and then posted onto the Web server, where they sit until requested by a browser....
Topics: Databases
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Concept Mapping Your Web Searches: A Design Rationale and Web-Enabled Application
Y-J Lee
Journal of Computer Assisted Learning Vol. 20, No. 2 (April 2004) pp. 103–113
Although it has become very common to use World Wide Web-based information in many educational settings, there has been little research on how to better search and organize Web-based information. This paper discusses the shortcomings of Web search...
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Delivering Distance Education Using Synchronous Web Audio Technology
Daniel Y. Lee
World Conference on Educational Media and Technology 2000 (2000) pp. 564–568
One of the key elements that is critical to the success of distance education is active collaboration between participants. "Two-way interaction with a given student and the instructor simply is not enough" (Palloff & Pratt, 1999). Online courses...
Topics: Interaction, Distance Education, Educational Technology, Collaboration, Audio
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Effects of Learner-Control versus Program-Control Strategies on Computer-Aided Learning of Chemistry Problems: For Acquisition or Review?
Seong-Soo Lee; Y H. K. Lee
Journal of Educational Psychology Vol. 83, No. 4 (1991) pp. 491–98
The assumption that learners are the best judges of learning needs in computer-assisted instruction was tested by assigning 55 eleventh graders to learner-control or program-control conditions. Results indicate that efficiency of the learner-control ...
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The effects of cognitive capacity and gaming expertise on attention and comprehension
Y.‐H. Lee; C. Heeter
Journal of Computer Assisted Learning Vol. 33, No. 5 (September 2017) pp. 473–485
Educational video games can impose high cognitive demands on its users. Two studies were conducted to examine the cognitive process involved in playing an educational digital game. Study 1 examined the effects of users' working memory capacity and...
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A Comparison Study of Polyominoes Explorations in a Physical and Virtual Manipulative Environment
Y Yuan; C -Y. Lee; C -H. Wang
Journal of Computer Assisted Learning Vol. 26, No. 4 (August 2010) pp. 307–316
This study develops virtual manipulative, polyominoes kits for junior high school students to explore polyominoes. The current work conducts a non-equivalent group pretest-post-test quasi-experimental design to compare the performance difference...
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Monte Carlo Simulation Using HyperCard and Lotus 1-2-3
Charles S. Oulman; Motoko Y. Lee
Monte Carlo simulation is a computer modeling procedure for mimicking observations on a random variable. A random number generator is used in generating the outcome for the events that are being modeled. The simulation can be used to obtain results...
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Practice Characteristics that Lead to 21st Century Learning Outcomes
Nancy Law; Y Lee; A Chow
Journal of Computer Assisted Learning Vol. 18, No. 4 (2002) pp. 415–26
Describes a study in Hong Kong elementary and secondary schools that investigated whether innovative teaching practices that used ICT (information and communication technology) would lead to learning outcomes needed for today's knowledge society....
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On Convergent Probability of a Random Walk
Y-F Lee; W-K Ching
International Journal of Mathematical Education in Science and Technology Vol. 37, No. 7 (Oct 15, 2006) pp. 833–838
This note introduces an interesting random walk on a straight path with cards of random numbers. The method of recurrent relations is used to obtain the convergent probability of the random walk with different initial positions.
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Partition-Based Hybrid Decoding (PHD): A Class of ML Decoding Schemes for MIMO Signals Based on Tree Partitioning and Combined Depth- and Breadth-First Search
J.I. Park; Y. Lee; S. Yoon
Journal of Applied Research and Technology Vol. 11, No. 2 (April 2013) pp. 213–224
In this paper, we propose a hybrid maximum likelihood (ML) decoding scheme for multiple-input multiple-output (MIMO) systems. After partitioning the searching tree into several stages, the proposed scheme adopts the combination of depth- and breadth-...
Language: English
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Hypermedia for Classroom Use: A Complement to Use in the Laboratory
Motoko Y. Lee; Charles S. Oulman
Teaching Sociology Vol. 19, No. 4 (1991) pp. 510–13
Recommends the classroom use of hypermedia. Observes that hypermedia allow instructors to interrupt lessons for critical evaluation, discussion, and prompt correction of mistakes. Suggests that using hypermedia in class is cheaper than setting up...
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A Web-Services-based E-Learning Infrastructure for Managing Virtual E-Learning Communities
Stanley Y. W. Su; Gilliean Lee
World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education 2004 (2004) pp. 2965–2972
There is a need to develop infrastructural technologies to enable general Internet users, not just students and educators, to engage in life-long instruction and learning. These technologies should allow the establishment of many virtual e-learning...
Topics: Learning Objects
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Three interaction patterns on asynchronous online discussion behaviours: A methodological comparison
I. Jo; Y. Park; H. Lee
Journal of Computer Assisted Learning Vol. 33, No. 2 (April 2017) pp. 106–122
An asynchronous online discussion (AOD) is one format of instructional methods that facilitate student-centered learning. In the wealth of AOD research, this study evaluated how students' behavior on AOD influences their academic outcomes. This case ...
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Cyclostationarity-Based Detection of Randomly Arriving or Departing Signals
Y. Lee; S.R. Lee; S. Yoo; H. Liu; S. Yoon
Journal of Applied Research and Technology Vol. 12, No. 6 (December 2014) pp. 1083–1091
This paper addresses the problem of detection of randomly arriving or departing primary user (PU) signals in cognitive radio systems. The detection problem of the dynamic PU signal is modeled as a binary hypothesis testing problem where the PU...
Language: English
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An Unambiguous Tracking Scheme Using Partial-Pulses for BOC Signals
Y. Lee; S.R. Lee; S. Yoo; H. Liu; S. Yoon
Journal of Applied Research and Technology Vol. 12, No. 6 (December 2014) pp. 1103–1114
The recent researches on the tracking of binary offset carrier (BOC) modulated signals have been studied focusing on resolving the ambiguity problem caused by the multiple side-peaks in BOC autocorrelation. In this paper, we propose a novel...
Language: English
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A Low-Complexity Integer Frequency Offset Estimation Scheme Using Combined Training Symbols for OFDM Systems
Y. Lee; S.R. Lee; S. Yoo; H. Liu; S. Yoon
Journal of Applied Research and Technology Vol. 12, No. 6 (December 2014) pp. 1073–1082
In orthogonal frequency division multiplexing (OFDM) systems, an integer part of a frequency offset (IFO) that causes ambiguity in data demodulation is estimated generally by comparing correlations between the received and local signals for IFO...
Language: English
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An OFDM Carrier Frequency Offset Estimation Scheme with Wide Fractional Offset Estimation Range
C. Yu; Y. Lee; S.Y. Kim; G.I. Jee; S. Yoon
Journal of Applied Research and Technology Vol. 11, No. 2 (April 2013) pp. 206–212
In this paper, we propose a carrier frequency offset (CFO) estimation scheme which is robust to the fractional CFO variation for orthogonal frequency division multiplexing (OFDM) systems. The proposed scheme first performs the envelope equalization...
Language: English
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Authenticity in Learning for the Twenty-First Century: Bridging the Formal and the Informal
David Hung; Shu-Shing Lee; Kenneth Y. T. Lim
Educational Technology Research and Development Vol. 60, No. 6 (December 2012) pp. 1071–1091
The paper attempts to bridge informal and formal learning by leveraging on affordance structures associated with informal environments to help learners develop social, cognitive, and metacognitive dispositions that can be applied to learning in...
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Web-Based Collaborative Inquiry Learning
Kuo-Eng Chang; Y-T Sung; C-L Lee
Journal of Computer Assisted Learning Vol. 19, No. 1 (2003) pp. 56–69
Proposes a Web-based collaborative inquiry learning system and describes a study of undergraduates at the National Taiwan Normal University based on a model system that investigated students' learning processes. Discusses the use of concept maps to...
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Transforming Medical and Health Science Education at Tufts University
Bruce A. Metz; Mary Y. Lee; Susan Albright; Tarik Alkasab
Educause Quarterly Vol. 24, No. 4 (2001) pp. 46–50
Describes the Tufts University Health Sciences Database, which combines course delivery, digital library, knowledge management, and curriculum management systems. (EV)
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Educational attainment of children of immigrants: Evidence from the national longitudinal survey of youth
Freddy Siahaan; Daniel Y. Lee; David E. Kalist
Economics of Education Review Vol. 38, No. 1 (February 2014) pp. 1–8
This study investigates the educational attainment of children of immigrants in the United States. By employing a more detailed classification of children of immigrants, we examine whether a foreign place of birth of either parent or child affects...
Language: English
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Lecture Rule No. 1: Cell Phones ON, Please! A Low-Cost Personal Response System for Learning and Teaching
Albert W. M. Lee; Joseph K. Y. Ng; Eva Y. W. Wong; Alfred Tan; April K. Y. Lau; Stephen F. Y. Lai
Journal of Chemical Education Vol. 90, No. 3 (March 2013) pp. 388–389
Every student has a powerful wireless signal transmitter, his or her cell phone, that can be used to replace the "clicker" as a personal response device. Our mobile phone-based response system (iQlickers) collects and analyzes the answers...
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Algorithmic Bricks: A Tangible Robot Programming Tool for Elementary School Students
D-Y Kwon; H-S Kim; J-K Shim; W-G Lee
IEEE Transactions on Education Vol. 55, No. 4 (November 2012) pp. 474–479
Tangible programming tools enable children to easily learn the programming process, previously considered to be difficult for them. While various tangible programming tools have been developed, there is still a lack of available tools to help...
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Students Assessing Their Own Collaborative Knowledge Building
Eddy Y. C. Lee; Carol K. K. Chan; Jan van Aalst
International Journal of Computer-Supported Collaborative Learning Vol. 1, No. 2 (June 2006) pp. 277–307
We describe the design of a knowledge-building environment and examine the role of knowledge-building portfolios in characterizing and scaffolding collaborative inquiry. Our goal is to examine collaborative knowledge building in the context of...
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An Analysis of Knowledge Management Mechanisms in Healthcare Portals
Chei Sian Lee; Dion Hoe-Lian Goh; Alton Y. K. Chua
Journal of Librarianship and Information Science Vol. 42, No. 1 (2010) pp. 20–44
Healthcare portals are becoming increasingly popular with Internet users since they play an important role in supporting interaction between individuals and healthcare organizations with a Web presence. Additionally, many of these organizations make ...
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Convergence of a Linear Recursive Sequence
E G. Tay; T L. Toh; F M. Dong; T Y. Lee
International Journal of Mathematical Education in Science and Technology Vol. 35, No. 1 (2004) pp. 51–63
A necessary and sufficient condition is found for a linear recursive sequence to be convergent, no matter what initial values are given. Its limit is also obtained when the sequence is convergent. Methods from various areas of mathematics are used...
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A Curriculum for a Master of Science in Information Quality
Yang W. Lee; Elizabeth Pierce; John Talburt; Richard Y. Wang; Hongwei Zhu
Journal of Information Systems Education Vol. 18, No. 2 (2007) pp. 233–242
The first Master of Science in Information Quality (IQ) degree is designed and being offered to prepare students for careers in industry and government as well as advanced graduate studies. The curriculum is guided by the Model Curriculum and...
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Clinical Training at Remote Sites Using Mobile Technology: An India-USA Partnership
R Vyas; S Albright; D Walker; A Zachariah; M Y. Lee
Distance Education Vol. 31, No. 2 (August 2010) pp. 211–226
Christian Medical College (CMC), India, and Tufts University School of Medicine, USA, have developed an "institutional hub and spokes" model (campus-based e-learning supporting m-learning in the field) to facilitate clinical education and training...
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A 6-Month Follow-Up of the Effects of an Information and Communication Technology (ICT) Training Programme on People with Intellectual Disabilities
Cecilia W. P. Li-Tsang; Maggie Y. F. Lee; Susanna S. S. Yeung; Andrew M. H. Siu; C S. Lam
Research in Developmental Disabilities Vol. 28, No. 6 (2007) pp. 559–566
We investigated the long-term effects of an information and communication technology (ICT) training programme for people with intellectual disabilities (ID). A community-based ICT training programme was designed to enhance the computer skills of...
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Tufts Health Sciences Database: Lessons, Issues, and Opportunities
Mary Y. Lee; Susan A. Albright; Tarik Alkasab; David A. Damassa; Paul J. Wang; Elizabeth K. Eaton
Academic Medicine Vol. 78, No. 3 (2003) pp. 254–64
Describes a seven-year experience with developing the Tufts Health Sciences Database, a database-driven information management system that combines the strengths of a digital library, content delivery tools, and curriculum management. Identifies...