Virtual Computer

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 2238 Experts worldwide ranked by ideXlab platform

Andreas Konstantinidis - One of the best experts on this subject based on the ideXlab platform.

Ralf Naues - One of the best experts on this subject based on the ideXlab platform.

  • e-Science - A Collaborative Virtual Computer Security Lab
    2006
    Co-Authors: Jörg Keller, Ralf Naues
    Abstract:

    The necessity of a lab course on Computer security arises from the students? need to complement course work by hands-on experience. In order to meet the distance teaching demands of our institution, we designed an internet-based laboratory. We sketch the types of tasks the students are to perform, and our approach to check immediately whether students have completed a task. Yet, the typical tasks in labs only cover work done alone, while security engineering often comprises tasks involving several independent parties. This in turn calls for collaborative tasks, which we sketch. As students operate in larger groups, and the server hosting the lab machines can only run a finite number of them simultaneously, a reservation scheme is employed to guarantee fair access for all participants.

  • A Collaborative Virtual Computer Security Lab
    2006 Second IEEE International Conference on e-Science and Grid Computing (e-Science'06), 2006
    Co-Authors: Jörg Keller, Ralf Naues
    Abstract:

    The necessity of a lab course on Computer security arises from the students' need to complement course work by hands-on experience. In order to meet the distance teaching demands of our institution, we designed an internet-based laboratory. We sketch the types of tasks the students are to perform, and our approach to check immediately whether students have completed a task. Yet, the typical tasks in labs only cover work done alone, while security engineering often comprises tasks involving several independent parties. This in turn calls for collaborative tasks, which we sketch. As students operate in larger groups, and the server hosting the lab machines can only run a finite number of them simultaneously, a reservation scheme is employed to guarantee fair access for all participants.

Abdullah Konak - One of the best experts on this subject based on the ideXlab platform.

  • AMCIS - An Exploratory Factor Analysis of Student Learning in a Collaborative Virtual Computer Laboratory
    2020
    Co-Authors: Abdullah Konak, Michael R. Bartolacci, Holly Huff
    Abstract:

    Information security is a growing part of the information technology function in an organization. Higher learning institutions generally do not provide much “hands-on” exposure to information security concepts due to costs, internal information security concerns, and a lack of worthwhile exercises that cater to students. We have created a collaborative Virtual Computer laboratory (CVCLAB) that seeks to leverage a large group of Virtual Computers together with specially designed laboratory exercises in order to create a learning environment for information security. We studied the impact of collaborative work on student learning using controlled experiments in the CVCLAB. In this paper, we are investigating how to best utilize the Virtual Computers for teaching information security debating such issues as whether learning is greater when exercises are conducted in groups or as individuals. We developed a research model based on Kolb’s Experiential Learning Theory and used an exploratory factor analysis to answer the research questions.

  • FIE - Impact of collaborative learning on student perception of Virtual Computer laboratories
    2016 IEEE Frontiers in Education Conference (FIE), 2016
    Co-Authors: Abdullah Konak, Michael R. Bartolacci, Sadan Kulturel-konak, Nasereddin
    Abstract:

    In the last decade, Virtual Computer laboratories have been successfully used to provide students with hands-on experimentation in information technology fields in a cost effective and secure manner. In this paper, we study the effect of collaborative learning on student perception and acceptance of Virtual computing as a learning medium. Virtual computing is a relatively new technology and can be intimidating for students at times with limited information technology background. Students can feel overwhelmed as they follow voluminous and tedious step-by-step information technology activities that are not very familiar to them. Collaborative learning can help to alleviate such problems and enhance the student experience of using a Virtual Computer laboratory in different ways. To investigate the effect of collaborative work on student experience in Virtual Computer laboratories and their acceptance of this new technology, we conducted empirical studies where two groups of students (with technology and non-technology backgrounds) performed two types of hands-on activities. These types were individual and collaborative in nature and were conducted in a Virtual Computer laboratory. Then, we compared the experiences of the two groups across the types of hands-on exercises. The preliminary findings show that novice students benefited more from collaborative learning when compared to more experienced, and probably more technologically competent, students.

  • Impact of collaborative learning on student perception of Virtual Computer laboratories
    2016 IEEE Frontiers in Education Conference (FIE), 2016
    Co-Authors: Abdullah Konak, Michael R. Bartolacci, Sadan Kulturel-konak, Mahdi Nasereddin
    Abstract:

    In the last decade, Virtual Computer laboratories have been successfully used to provide students with hands-on experimentation in information technology fields in a cost effective and secure manner. In this paper, we study the effect of collaborative learning on student perception and acceptance of Virtual computing as a learning medium. Virtual computing is a relatively new technology and can be intimidating for students at times with limited information technology background. Students can feel overwhelmed as they follow voluminous and tedious step-by-step information technology activities that are not very familiar to them. Collaborative learning can help to alleviate such problems and enhance the student experience of using a Virtual Computer laboratory in different ways. To investigate the effect of collaborative work on student experience in Virtual Computer laboratories and their acceptance of this new technology, we conducted empirical studies where two groups of students (with technology and non-technology backgrounds) performed two types of hands-on activities. These types were individual and collaborative in nature and were conducted in a Virtual Computer laboratory. Then, we compared the experiences of the two groups across the types of hands-on exercises. The preliminary findings show that novice students benefited more from collaborative learning when compared to more experienced, and probably more technologically competent, students.

  • using kolb s experiential learning cycle to improve student learning in Virtual Computer laboratories
    Computers in Education, 2014
    Co-Authors: Abdullah Konak, Tricia K Clark, Mahdi Nasereddin
    Abstract:

    In information security education, learning experiences that involve hands-on experimentation are extremely important. However, information security topics are challenging to teach in traditional Computer laboratories mainly due to restrictive information technology policies. In the literature, Virtual Computer laboratories have been proposed to address the challenges of providing students with hands-on learning experiences in information security. While the literature mainly focuses on technical aspects of Virtual Computer laboratories and related hands-on activities, pedagogical aspects of hands-on activities are overlooked. Our experiences with a Virtual Computer laboratory have shown that hands-on activities which are designed based on a prescriptive, step-by-step approach do not always achieve the expected learning outcomes. In this paper, we propose Kolb's Experiential Learning Cycle as a framework to design hands-on activities in Virtual Computer laboratories, and we argue that hands-on activities designed based on this framework enhance student learning outcomes. We illustrate how the stages of Kolb's model can be incorporated into hands-on activities and present results from two empirical studies to test the effectiveness of the proposed framework. The empirical findings in the first study suggest that hands-on activities designed based on the proposed framework are more likely to increase student interest and competency compared to step-by-step hands-on activities. In the second study, the collected data is analyzed using structural equation modeling to determine the relationships among the factors affecting student learning outcomes as a result of hands-on activities. The results of the second study show that student-to-student interaction is an important factor determining student learning experiences. Hands-on learning is studied in Virtual Computer laboratories.Cookbook activities do not achieve comprehensive learning.To enhance student learning, Kolb's model is proposed to design hands-on activities.The benefits of Kolb's model are investigated in the information security domain.The proposed approach enhances student learning in Virtual Computer laboratories.

  • Best practices to design hands-on activities for Virtual Computer laboratories
    2013 IEEE Integrated STEM Education Conference (ISEC), 2013
    Co-Authors: Abdullah Konak, Tricia Clark, Mahdi Nasereddin
    Abstract:

    In this paper, we introduce a collaborative Virtual Computer laboratory and discuss best strategies to foster student learning using Virtual Computers, particularly in information security which requires substantial hands-on experimentation to master the subject matter. Unfortunately, information security topics are challenging to teach in traditional Computer laboratories mainly due to restrictive information technology policies. In recent decades, Virtual computing has become a promising solution to address the challenges of providing students with hands-on learning experiences in information security. While the literature mainly focuses on technical aspects of Virtual Computer laboratories and provides ample examples about how they can be used in information security courses, there is a lack of pedagogical studies. We introduce a framework based on Kolb's Experiential Learning Cycle to design activities for Virtual Computer laboratories. We provide empirical evidence that if Virtual Computer activities are designed and conducted according to this framework, student learning can be enhanced even further.

Thrasyvoulos Tsiatsos - One of the best experts on this subject based on the ideXlab platform.

Jason Nieh - One of the best experts on this subject based on the ideXlab platform.

  • A personal Virtual Computer recorder
    2020
    Co-Authors: Jason Nieh, Oren Laadan
    Abstract:

    Continuing advances in hardware technology have enabled the proliferation of faster, cheaper, and more capable personal Computers. Users of all backgrounds rely on their Computers to handle ever-expanding information, communication, and computation needs. As users spend more time interacting with their Computers, it is becoming increasingly important to archive and later search the knowledge, ideas and information that they have viewed through their Computers. However, existing state-of-the-art web and desktop search tools fail to provide a suitable solution, as they focus on static, accessible documents in isolation. Thus, finding the information one has viewed among the ever-increasing and chaotic sea of data available from a Computer remains a challenge. This dissertation introduces DejaView, a personal Virtual Computer recorder that enhances personal Computers with the ability to process display-centric content to help users with all the information they see through their Computers. DejaView continuously records a user's session to provide a complete WYSIWYS (What You Search Is What You've Seen) record of a desktop computing experience, enabling users to playback, browse, search, and revive records, making it easier to retrieve and interact with information they have seen before. DejaView records visual output, checkpoints corresponding application and file system states, and captures onscreen text with contextual information to index the record. A user can then browse and search the record for any visual information that has been previously displayed on the desktop, and revive and interact with the desktop computing state corresponding to any point in the record. DejaView introduces new, transparent operating system, display and file system Virtualization techniques and novel semantic display-centric information recording, and combines them to provide its functionality without any modifications to applications, window systems, or operating system kernels. Our results demonstrate that DejaView can provide continuous low-overhead recording without any user-noticeable performance degradation, and allows users to playback, browse, search, and time-travel back to records fast enough for interactive use. This dissertation also demonstrates how DejaView's execution Virtualization and recording extend beyond the desktop recorder context. We introduce a coordinated, parallel checkpoint-restart mechanism for distributed applications that minimizes synchronization overhead and uniquely supports complete checkpoint and restart of network state in a transport protocol independent manner, for both reliable and unreliable protocols. We introduce a scalable system that enables significant energy saving by migrating network state and applications off of idle hosts allowing the hosts to enter low-power suspend state, while preserving their network presence. Finally, we show how our techniques can be integrated into a commodity operating system, mainline Linux, thereby allowing the entire operating systems community to benefit from mature checkpoint-restart that is transparent, secure, reliable, efficient, and integral to the Linux kernel.

  • dejaview a personal Virtual Computer recorder
    Symposium on Operating Systems Principles, 2007
    Co-Authors: Oren Laadan, Ricardo A Baratto, Dan B Phung, Shaya Potter, Jason Nieh
    Abstract:

    As users interact with the world and their peers through their Computers, it is becoming important to archive and later search the information that they have viewed. We present DejaView, a personal Virtual Computer recorder that provides a complete record of a desktop computing experience that a user can playback, browse, search, and revive seamlessly. DejaView records visual output, checkpoints corresponding application and file system state, and captures displayed text with contextual information to index the record. A user can then browse and search the record for any visual information that has been displayed on the desktop, and revive and interact with the desktop computing state corresponding to any point in the record. DejaView combines display, operating system, and file system Virtualization to provide its functionality transparently without any modifications to applications, window systems, or operating system kernels. We have implemented DejaView and evaluated its performance on real-world desktop applications. Our results demonstrate that DejaView can provide continuous low-overhead recording without any user noticeable performance degradation, and allows browsing, search and playback of records fast enough for interactive use.

  • SOSP - DejaView: a personal Virtual Computer recorder
    Proceedings of twenty-first ACM SIGOPS symposium on Operating systems principles - SOSP '07, 2007
    Co-Authors: Oren Laadan, Ricardo A Baratto, Dan B Phung, Shaya Potter, Jason Nieh
    Abstract:

    As users interact with the world and their peers through their Computers, it is becoming important to archive and later search the information that they have viewed. We present DejaView, a personal Virtual Computer recorder that provides a complete record of a desktop computing experience that a user can playback, browse, search, and revive seamlessly. DejaView records visual output, checkpoints corresponding application and file system state, and captures displayed text with contextual information to index the record. A user can then browse and search the record for any visual information that has been displayed on the desktop, and revive and interact with the desktop computing state corresponding to any point in the record. DejaView combines display, operating system, and file system Virtualization to provide its functionality transparently without any modifications to applications, window systems, or operating system kernels. We have implemented DejaView and evaluated its performance on real-world desktop applications. Our results demonstrate that DejaView can provide continuous low-overhead recording without any user noticeable performance degradation, and allows browsing, search and playback of records fast enough for interactive use.

Virtual Computer - 15 days free trial to Access Experts & Abstracts