Department of Computer Information and Graphics Technology
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Item Database-Driven Website Development for Non-Profit Agencies(Office of the Vice Chancellor for Research, 2013-04-05) Elliott, RobThe Near Eastside Legacy Initiative grant program was created to give non-profit agencies the funds to further their missions to serve neighborhoods in Indianapolis. Two non-profit organizations were selected to receive grant funds in Spring 2013 and chose to apply those proceeds to the development of new websites to significantly increase their presence and community engagement opportunities. Students from the Computer Information and Graphics Technology department at IUPUI were asked to develop the websites as part of the grant project. Twelve students volunteered for the project and were split into three teams, each of which completed the entire website development process independently over the course of eight weeks. The teams conducted client interviews, researched existing software, created and edited visual elements, and produced websites backed by the Wordpress content management system. After further consultation with the clients, updates were made and the student teams produced training materials with specific task-based instructions so that the websites could be maintained by the agencies. The organizations expect to launch their new database-driven websites in spring 2013. The students gained valuable experience working directly with clients, responding to a variety of business needs, a deeper understanding of creating software for non-technical individuals, and solid exposure to a typical scenario that developers of all types face every day.Item Supplementary Material to “Distributed Consensus-based Weight Design for Cooperative Spectrum Sensing”(IEEE, 2015-01) Zhang, Wenlin; Guo, Yi; Liu, Hongbo; Chen, Yingying; Wang, Zheng; Mitola, Joseph III; Department of Computer Information and Graphics Technology, School of Engineering and TechnologyAbstract—This material is a supplement to the paper “Distributed Consensus-based Weight Design for Cooperative Spectrum Sensing”. Section 1 offers related literature review on cooperative spectrum sensing and consensus algorithms. Section 2 presents related notations and models of the consensus-based graph theory. Section 3 offers further analysis of the proposed spectrum sensing scheme including detection threshold settings and convergence properties in terms of detection performance. Section 4 presents the proofs for the convergence of the proposed consensus algorithm, and discusses the convergence of the proposed algorithm under random link failure network models. Section 5 shows additional simulation results.Item Distributed Consensus-based Weight Design for Cooperative Spectrum Sensing(IEEE, 2015-01) Zhang, Wenlin; Guo, Yi; Liu, Hongbo; Chen, Yingying; Wang, Zheng; Mitola, Joseph III; Department of Computer Information and Graphics Technology, School of Engineering and TechnologyIn this paper, we study the distributed spectrum sensing in cognitive radio networks. Existing distributed consensus-based fusion algorithms only ensure equal gain combining of local measurements, whose performance may be incomparable to various centralized soft combining schemes. Motivated by this fact, we consider practical channel conditions and link failures, and develop new weighted soft measurement combining without a centralized fusion center. Following the measurement by its energy detector, each secondary user exchanges its own measurement statistics with its local one-hop neighbors, and chooses the information exchanging rate according to the measurement channel condition, e.g., the signal-to-noise ratio (SNR). We rigorously prove the convergence of the new consensus algorithm, and show all secondary users hold the same global decision statistics from the weighted soft measurement combining throughout the network. We also provide distributed optimal weight design under uncorrelated measurement channels. The convergence rate of the consensus iteration is given under the assumption that each communication link has an independent probability to fail, and the upper bound of the iteration number of the $ \epsilon$ -convergence is explicitly given as a function of system parameters. Simulation results show significant improvement of the sensing performance compared to existing consensus-based approaches, and the performance of the distributed weighted design is comparable to the centralized weighted combining scheme.Item USABILITY TESTING AND THE RELATIONSHIP BETWEEN COMPUTER LITERACY AND EFFECTIVE USE OF A CHEMICAL KNOWLEDGE BASE BY FIRST-SEMESTER ORGANIC CHEMISTRY STUDENTS(Office of the Vice Chancellor for Research, 2012-04-13) Matthews, Kristin; Glass, Derek; Elliott, Rob; Denton, RyanUsability testing is a technique that allows for the examination of a spe-cific user’s effectiveness, efficiency and satisfaction in achieving goals (Law, Hvannberg, 2002). This user-focused design process has been found to be particularly important in early site development. In this study, multiple inter-faces of the knowledge base will be examined comparatively, changing only the aesthetics. Using a think-aloud process, users will be walked through seven scenarios in the IUPUI Chemistry Knowledge Base, and asked to vo-calize their thoughts as they attempt each situation. Completion of user questionnaires and a post-test System Usability Scale (SUS) will provide recommendations from which improvements may be made to the design, layout and management of the Knowledge Base (Brooke, 1996).Item THE EFFECTS OF A KNOWLEDGE BASE ON THE LOGICAL REASONING OF STUDENTS IN THE FIRST-SEMESTER ORGANIC CHEMISTRY LECTURE(Office of the Vice Chancellor for Research, 2012-04-13) Skomp, Jordan; Smith, Rashod; Denton, Ryan; Elliott, RobWhile several studies have been conducted on the correlation be-tween gains in students’ individual reasoning ability and using web-based learning tools, this is the first investigation of the effect of use of an online knowledge base on students reasoning ability in organic chemistry. The IUPUI Chemistry Knowledge Base (chemkb.cs.iupui.edu) was developed to provide a supplemental prob-lem-solving tool and information repository for organic chemistry lec-ture students. An initial Group Assessment of Logical Thinking (GALT) test was given to establish a baseline of students’ reasoning ability and to form comparable group populations. The experimental group of stu-dents was encouraged to use the knowledge base and the control group of students was given no treatment. The GALT test was modified and re-administered to determine any potential gains in logical reason-ing ability. Two content specific tools, a written quiz and a group solved workshop problem, were used to determine content oriented reasoning and problem-solving between experimental and control groups. Statistical analysis of correlations between initial logical rea-soning ability, exposure to the knowledge base, and performance on the administered tools will be presented. 1Department of Computer Information and Leadership Technology, Indiana Universi-ty Purdue University Indianapolis, Indianapolis, IN 46202 This study was sponsored by the Indiana University Purdue University Indianapolis Multidisciplinary Undergraduate Research Institute (MURI)Item Do Students Like the Flipped Classroom? An Investigation of Student Reaction to a Flipped Undergraduate IT Course(IEEE, 2014-10) Elliott, Rob; Department of Computer Information and Graphics Technology, School of Engineering and TechnologyThe flipped classroom pedagogy has achieved significant mention in academic circles in recent years. "Flipping" involves the reinvention of a traditional course so that students engage with learning materials via recorded lectures and interactive exercises prior to attending class and then use class time for more interactive activities. Proper implementation of a flipped classroom is difficult to gauge, but combines successful techniques for distance education with constructivist learning theory in the classroom. While flipped classrooms are not a novel concept, technological advances and increased comfort with distance learning have made the tools to produce and consume course materials more pervasive. Flipped classroom experiments have had both positive and less-positive results and are generally measured by a significant improvement in learning outcomes. This study, however, analyzes the opinions of students in a flipped sophomore-level information technology course by using a combination of surveys and reflective statements. The author demonstrates that at the outset students are new - and somewhat receptive - to the concept of the flipped classroom. By the conclusion of the course satisfaction with the pedagogy is significant. Finally, student feedback is provided in an effort to inform instructors in the development of their own flipped classrooms.Item Integrating DevOps Into the Web Development Curriculum with AWS(Office of the Vice Chancellor for Research, 2016-04-08) Herbert, Jasmine; Elliott, RobCurrently within IUPUI’s Computer and Information Technology curriculum, students are responsible for hosting content on three main servers throughout the course of the degree program. Not only have these three main servers been preconfigured for the students but also they are typically reset at the conclusion of each semester resulting in lost files if the student has not saved their work locally. The overall goal of this research project is to study the benefits and feasibility of implementing a unified hosting service through the Amazon Web Services Educate program within the CIT curriculum. By implementing a unified hosting service, students will be provided with an experiential learning opportunity to manage their own AWS account from the 100 level courses throughout their entire undergraduate program. Ultimately, AWS has the ability to enable students on high-performance computing, prepare students for careers in cloud computing, and integrate a consistent platform into a variety of courses. Mentor: Rob Elliott, Department of Computer Information and Graphics Technology, Purdue School of Engineering and Technology, IUPUIItem Capturing the Perceived Phantom Limb through Virtual Reality(Hindawi, 2016-09-05) Rogers, Christian; Lau, Jonathan; Huynh, Denver; Albertson, Steven; Beem, James; Qian, Enlin; Department of Computer Information and Graphics, School of Engineering and TechnologyPhantom limb is the sensation amputees may feel when the missing limb is still attached to the body and is still moving as it would if it still existed. Despite there being between 50 and 80% of amputees who report neuropathic pain, also known as phantom limb pain (PLP), there is still little understanding of why PLP occurs. There are no fully effective long-term treatments available. One of the struggles with PLP is the difficulty for amputees to describe the sensations of their phantom limbs. The sensations may be of a limb that is in a position that is impossible for a normal limb to attain. The goal of this project was to treat those with PLP by developing a system to communicate the sensations those with PLP were experiencing accurately and easily through various hand positions using a model arm with a user friendly interface. The system was developed with Maya 3D animation software, the Leap Motion input device, and the Unity game engine. The 3D modeled arm was designed to mimic the phantom sensation being able to go beyond normal joint extensions of regular arms. The purpose in doing so was to obtain a true 3D visualization of the phantom limb.Item How To Get the Most From Canvas: Best Practices and Lessons Learned(2017-06-12) Elliott, Rob; Hook, Sara AnneThis engaging presentation offers a wealth of insights, tips and recommendations for how to get the most from Canvas, including tools included or accessible via Canvas and Canvas Analytics. Reflecting rich diversity in subject expertise, the presenters have been teaching and taking online courses for more than 30 years combined. Specific topics to be covered: Enhancing Student Engagement and Collaboration, Canvas Analytics and Course Organization: Pages versus Modules.Item ACTS: Extracting Android App Topological Signature through Graphlet Sampling(IEEE, 2016-10) Peng, Wei; Gao, Tianchong; Sisodia, Devkishen; Saha, Tanay Kumar; Li, Feng; Al Hasan, Mohammad; Computer Information and Graphics Technology, School of Engineering and TechnologyAndroid systems are widely used in mobile & wireless distributed systems. In the near future, Android is believed to dominate the mobile distributed environment. However, with the popularity of Android-based smartphones/tablets comes the rampancy of Android-based malware. In this paper, we propose a novel topological signature of Android apps based on the function call graphs (FCGs) extracted from their Android App Packages (APKs). Specifically, by leveraging recent advances in graphlet sampling, the proposed method fully captures the invocator-invocatee relationship at local neighborhoods in an FCG without exponentially inflating the state space. Using real benign app and malware samples, we demonstrate that our method, ACTS (App topologiCal signature through graphleT Sampling), can detect malware and identify malware families robustly and efficiently. More importantly, we demonstrate that, without augmenting the FCG with any semantic features such as bytecode-based vertex typing, local topological information captured by ACTS alone can achieve a high malware detection accuracy. Since ACTS only uses structural features, which are orthogonal to semantic features, it is expected that combining them would give a greater improvement in malware detection accuracy than combining non-orthogonal semantic features.