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Old Dominion University

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Articles 1 - 15 of 15

Full-Text Articles in Science and Technology Studies

Bitcoin Selfish Mining Modeling And Dependability Analysis, Chencheng Zhou, Liudong Xing, Jun Guo, Qisi Liu Jan 2022

Bitcoin Selfish Mining Modeling And Dependability Analysis, Chencheng Zhou, Liudong Xing, Jun Guo, Qisi Liu

Electrical & Computer Engineering Faculty Publications

Blockchain technology has gained prominence over the last decade. Numerous achievements have been made regarding how this technology can be utilized in different aspects of the industry, market, and governmental departments. Due to the safety-critical and security-critical nature of their uses, it is pivotal to model the dependability of blockchain-based systems. In this study, we focus on Bitcoin, a blockchain-based peer-to-peer cryptocurrency system. A continuous-time Markov chain-based analytical method is put forward to model and quantify the dependability of the Bitcoin system under selfish mining attacks. Numerical results are provided to examine the influences of several key parameters related to …

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Curriculum Development For Robotics Technology Program, Sanjeevi Chitikeshi, Shirshak K. Dhali, Betsey Odell, Vukica Jovanovic, Cheng Y. Lin Jun 2020

Curriculum Development For Robotics Technology Program, Sanjeevi Chitikeshi, Shirshak K. Dhali, Betsey Odell, Vukica Jovanovic, Cheng Y. Lin

Engineering Technology Faculty Publications

With a growing need for a more skilled workforce, providing industry-driven and employment centric training services is an important national priority. Over 3.4 million manufacturing jobs will need to be filled across the United Sates over the next decade. The skills gap is becoming greater based on the statistics provided by the Global Robotics Technology Market: Forecast, 2014-2020 published by Research and Markets, reporting that the worldwide robotics market is forecast to grow from the 2015 level of $26.98B to $82.78B in 2020. This 11 % compounded average growth in the next five years is unprecedented. Given the anticipated growth …

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A Transformative Concept: From Data Being Passive Objects To Data Being Active Subjects, Hans-Peter Plag, Shelley-Ann Jules-Plag Dec 2019

A Transformative Concept: From Data Being Passive Objects To Data Being Active Subjects, Hans-Peter Plag, Shelley-Ann Jules-Plag

OES Faculty Publications

The exploitation of potential societal benefits of Earth observations is hampered by users having to engage in often tedious processes to discover data and extract information and knowledge. A concept is introduced for a transition from the current perception of data as passive objects (DPO) to a new perception of data as active subjects (DAS). This transition would greatly increase data usage and exploitation, and support the extraction of knowledge from data products. Enabling the data subjects to actively reach out to potential users would revolutionize data dissemination and sharing and facilitate collaboration in user communities. The three core elements …

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Incorporating Diegetic Elements To Increase Engagement In Games For Engineering Education, Katherine Smith, Yuzhong Shen, Anthony W. Dean Jun 2018

Incorporating Diegetic Elements To Increase Engagement In Games For Engineering Education, Katherine Smith, Yuzhong Shen, Anthony W. Dean

VMASC Publications

One of the difficulties in developing educational games is maintaining player engagement. This engagement is critical for games to provide effective learning experiences. One way to increase engagement in games is to limit interruptions during game play. In educational games, this can be accomplished by incorporating learning or problem-solving elements diegetically. Diegetic elements are those that are part of the game scene. With this in mind, a series of games for Science, Technology, Engineering, and Mathematics (STEM) education has been developed focusing on content in courses that are prerequisites to the engineering curriculum. These games cover topics in pre-calculus, calculus, …

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Delving Into The Specificity Of Instructional Guidance In Social Media-Supported Learning Environments, Tian Luo Jan 2018

Delving Into The Specificity Of Instructional Guidance In Social Media-Supported Learning Environments, Tian Luo

STEMPS Faculty Publications

Aim/Purpose: This study investigates the variations in student participation patterns across different types of instructional activities, learning modes, and with different instructional guidance approaches. In the current study, different variables, modes of learning (guided versus unguided), and types of guidance (social versus cognitive) were manipulated in a series of microblogging-supported collaborative learning tasks to examine to what extent and in which aspects instructional guidance affects the effectiveness and student perception of microblogging-supported learning.

Background: Despite the overwhelming agreement on the importance of instructional guidance in microblogging-supported learning environments, very few studies have been done to examine the specificity of guidance, …

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Effects Of Light Intensity On Spatial Visualization Ability, Petros J. Katsioloudis ., Mildred Jones Apr 2017

Effects Of Light Intensity On Spatial Visualization Ability, Petros J. Katsioloudis ., Mildred Jones

STEMPS Faculty Publications

A plethora of technological advances have happened since artificial illumination was developed by Thomas Edison. Like technology has had an effect in many areas in the modern civilization it also made a difference in the classroom. Nowadays, students can have instruction in classrooms with no external windows, even during gloomy winter or rainy days, and virtually during any hour of the day. Several lightning devices are being used, ranging from energy efficient LEDs to fluorescent lighting. Some forms of lighting methods have been found to be inappropriate for prolonged exposure to the human eye such as various gas-discharge lamps that …

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Use Of Virtual Reality Head-Mounted Displays For Engineering Technology Students And Implications On Spatial Visualization, Petros Katsioloudis, Mildred Jones, Vukica Jovanovic Jan 2017

Use Of Virtual Reality Head-Mounted Displays For Engineering Technology Students And Implications On Spatial Visualization, Petros Katsioloudis, Mildred Jones, Vukica Jovanovic

STEMPS Faculty Publications

Results from a number of studies indicate that the use of head-mounted displays can influence spatial visualization ability; however, research provides inconsistent results. Considering this, a quasi-experimental study was conducted to identify the existence of statistically significant effects on rotational view drawing ability due to the impacts of the displays. In particular, the study compared the use of three different types of displays; head-mounted, pc dynamic and 3D printed and whether a significant difference exists towards rotational view drawing ability, among engineering technology students. According to the results of this study it is suggested that the impact of the display …

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Use Of Dynamic Visualizations For Engineering Technology, Industrial Technology, And Science Education Students: Implications On Ability To Correctly Create A Sectional View Sketch, Petros J. Katsioloudis, Daniel Dickerson, Vukica Jovanovic, Mildred V. Jones Jan 2016

Use Of Dynamic Visualizations For Engineering Technology, Industrial Technology, And Science Education Students: Implications On Ability To Correctly Create A Sectional View Sketch, Petros J. Katsioloudis, Daniel Dickerson, Vukica Jovanovic, Mildred V. Jones

Engineering Technology Faculty Publications

Spatial abilities, specifically visualization, play a significant role in the achievement in a wide array of professions including, but not limited to, engineering, technical, mathematical, and scientific professions. However, there is little correlation between the advantages of spatial ability as measured through the creation of a sectional-view sketch between engineering technology, industrial technology, and science education students. A causal-comparative study was selected as a means to perform the comparative analysis of spatial visualization ability. This study was done to determine the existence of statistically significant difference between engineering technology, industrial technology, and science education students’ ability to correctly create a …

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Application Of Visual Cues On 3d Dynamic Visualizations For Engineering Technology Students And Effects On Spatial Visualization Ability: A Quasi-Experimental Study, Petros Katsioloudis, Vukica Jovanovic, Mildred Jones Jan 2016

Application Of Visual Cues On 3d Dynamic Visualizations For Engineering Technology Students And Effects On Spatial Visualization Ability: A Quasi-Experimental Study, Petros Katsioloudis, Vukica Jovanovic, Mildred Jones

STEMPS Faculty Publications

Several theorists believe that different types of visual cues influence cognition and behavior through learned associations; however, research provides inconsistent results. Considering this, a quasi-experimental study was done to determine if there are significant positive effects of visual cues (color blue) and to identify if a positive increase in spatial visualization ability for students in engineering technology courses is observed. According to the results of this study it is suggested that the use of the specific visual cue (color blue) provides no statistically significant higher scores versus the treatment that did not utilize any visual cues.

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Impacts Of Music On Sectional View Drawing Ability For Engineering Technology Students As Measured Through Technical Drawings, Petros J. Katsioloudis, Mildred Jones, Vukica Jovanovic Jan 2016

Impacts Of Music On Sectional View Drawing Ability For Engineering Technology Students As Measured Through Technical Drawings, Petros J. Katsioloudis, Mildred Jones, Vukica Jovanovic

STEMPS Faculty Publications

Results from a number of studies indicate that the use of different types of music can influence cognition and behavior; however, research provides inconsistent results. Considering this, a quasi-experimental study was conducted to identify the existence of statistically significant effects on sectional view drawing ability due to the impacts of music. In particular, the study compared the use of three different types of music; classical, rock, heavy metal and whether a significant difference exists towards sectional view drawing ability, among engineering technology students. According to the results of this study it is suggested that the impact of music provides no …

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Designing Playful Games And Applications To Support Science Centers Learning Activities, Michail N. Giannakos, David Jones, Helen Crompton, Nikos Chrisochoides Jun 2014

Designing Playful Games And Applications To Support Science Centers Learning Activities, Michail N. Giannakos, David Jones, Helen Crompton, Nikos Chrisochoides

Teaching & Learning Faculty Publications

In recent years there has been a renewed interest on science, technology, engineering, and mathematics (STEM) education. Following this interest, science centers' staff started providing technology enhanced informal STEM education experiences. The use of well-designed mobile and ubiquitous forms of technology to enrich informal STEM education activities is an essential success factor. The goal of our research is to investigate how technology applications can be better used and developed for taking full advantage of the opportunities and challenges they provide for students learning about STEM concepts. In our approach, we have conducted a series of interviews with experts from science …

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Toward A Formalism Of Modeling And Simulation Using Model Theory, Saikou Y. Diallo, Jose Padilla, Ross Gore, Heber Herencia-Zapana, Andreas Tolk Jan 2014

Toward A Formalism Of Modeling And Simulation Using Model Theory, Saikou Y. Diallo, Jose Padilla, Ross Gore, Heber Herencia-Zapana, Andreas Tolk

VMASC Publications

This article proposes a Modeling and Simulation (M&S) formalism using Model Theory. The article departs from the premise that M&S is the science that studies the nature of truth using models and simulations. Truth in models and simulations is relative as they seek to answer specific modeling questions. Consequently, truth in M&S is relative because every model is a purposeful abstraction of reality. We use Model Theory to express the proposed formalism because it is built from the premise that truth is relative. The proposed formalism allows us to: (1) deduce formal definitions and explanations of areas of study in …

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Mobile Cloud Learning For Higher Education: A Case Study Of Moodle In The Cloud, Minjuan Wang, Yong Chen, Muhammad Jahanzaib Khan Jan 2014

Mobile Cloud Learning For Higher Education: A Case Study Of Moodle In The Cloud, Minjuan Wang, Yong Chen, Muhammad Jahanzaib Khan

Information Technology & Decision Sciences Faculty Publications

Mobile cloud learning, a combination of mobile learning and cloud computing, is a relatively new concept that holds considerable promise for future development and delivery in the education sectors. Cloud computing helps mobile learning overcome obstacles related to mobile computing. The main focus of this paper is to explore how cloud computing changes traditional mobile learning. A case study of the usage of Moodle in the cloud via mobile learning in Khalifa University was conducted.

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Using Data Mining For Predicting Relationships Between Online Question Theme And Final Grade, M'Hammed Abdous, Wu He, Cherng-Jyh Yen Jan 2012

Using Data Mining For Predicting Relationships Between Online Question Theme And Final Grade, M'Hammed Abdous, Wu He, Cherng-Jyh Yen

Information Technology & Decision Sciences Faculty Publications

As higher education diversifies its delivery modes, our ability to use the predictive and analytical power of educational data mining (EDM) to understand students' learning experiences is a critical step forward. The adoption of EDM by higher education as an analytical and decision making tool is offering new opportunities to exploit the untapped data generated by various student information systems (SIS) and learning management systems (LMS). This paper describes a hybrid approach which uses EDM and regression analysis to analyse live video streaming (LVS) students' online learning behaviours and their performance in their courses. Students' participation and login frequency, as …

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Ivr Test & Survey: A Computer Program To Collect Data Via Computerized Telephonic Applications, Louis H. Janda, Michael Janda, Eric Tedford Jan 2001

Ivr Test & Survey: A Computer Program To Collect Data Via Computerized Telephonic Applications, Louis H. Janda, Michael Janda, Eric Tedford

Psychology Faculty Publications

Several studies have demonstrated the advantages of using interactive voice response (IVR) technology to collect self-report data from research participants and recipients of psychological/medical services. IVR allows participants to phone a computer and respond to recorded questions by pressing the appropriate touch-tone keys on their telephone. Because this technology offers substantial benefits in terms of cost and efficiency, it is surprising that it has not been more widely utilized by researchers and practitioners. Along with the automation of the administration and scoring of tests or surveys, IVR provides for questioning to be adapted to the participants' responses. One possible explanation …

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