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Daniel A Dougherty
Graduate Student 85 Engineer's Way, PO Box 400740
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Spring '11 - Present Workflow and Job Management on the Grid |
Condor is one of the most widely used distributed computing platforms available, due to the ease with which a user can begin executing jobs. Meanwhile, standards are being developed and adopted in the Grid system community to promote interoperability. We seek to model the aspects of Condor that users need, and provide services on the Grid that reduce the learning curve for transitioning Condor users. |
Advisor: Dr. Andrew Grimshaw, Professor, University of Virginia Key Topics: Distributed Systems, Grid Computing, Workflow Management, Language Translation, Condor, JSDL |
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Summer '10 – Spring '11 Secure Programming for E-Commerce |
In many teaching environments, security is treated as an afterthought: the students learn functionality with little or no regard for the security of the product, with the expectation that security will be learned later. We adopt a new method, in which the student is taught new technologies useful for E-Commerce, and how to utilize those technologies while emphasizing security as a primary design principle. |
Advisor: Dr. Alfred Weaver, Professor, University of Virginia Key Topics: Pedagogy, Security, E-Commerce Technologies, Ethical Hacking, Web Services |
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Spring '10 Teaching Assistant |
CS 1110: Introduction to Programming |
Advisor: Dr. Paul Reynolds, Professor, and Dr. Kevin Sullivan, Associate Professor, University of Virginia Key Topics: Introduction to Computer Science, JAVA |
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Fall '08 – Summer '09 Dynamic Code Cache Management to Improve Dynamic Binary Instrumentation Performance |
Some previous work uncovered an anomaly in the performance of some benchmark programs wherein a program’s performance while instrumented will improve when the size of the virtual code cache is limited. We seek to take advantage of this behavior using adaptive techniques to monitor the code cache and flush out old data when it becomes cumbersome. |
Advisor: Dr. Kim Hazelwood, Assistant Professor, University of Virginia Key Topics: Virtual Machines, Memory Management, Adaptive Execution |
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Summer '08 – Fall '08 Effects of Dynamic Binary Instrumentation on Hardware Branch Prediction |
Dynamic
Binary Instrumentation (DBI) tools often utilize a virtual code cache in
their execution, in which traces of a program are extracted and
recompiled, often with some instrumentation code or optimizations. This
behavior is quite different from the standard execution environment that
CPUs are generally designed for, which can cause a substantial impact on
the performance of hardware components like the branch predictor. This
project studied this impact in detail for two such DBIs, Pin and
DynamoRIO. |
Advisor: Dr. Kim Hazelwood, Assistant Professor, University of Virginia Key Topics: Architecture, Virtual Machines, Workload Characterization |
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Spring '08 HOCA: Operating System Design on x86 |
A
graduate-level computer science curriculum often includes a course in
Operating System design, in which a student will implement a small
Operating System over the course of a semester in order to learn about
the more intricate details of OS design. As technology advances, so too
must the design of these academic Operating Systems to reflect those
advancements. In this project, we studied the current technology
available for such an update, and began the transition from a Motorola
68000 simulator to an x86 virtual machine. |
Advisor: Dr. Ken Mandelberg, Associate Professor, Emory University Key Topics: Operating Systems, Architecture, Software Engineering |
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Summer '07 – Spring '08 EDIT: Extensible Data Identification Toolkit
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In the
medical community, there is a vast amount of unstructured data available
in the reports that physicians must maintain throughout day to day
activities. This data goes largely unutilized by the research community
for two primary reasons: 1) the format of the data is nonstandard
between institutions, and 2) the data is scattered across the globe in
medical records vaults where no one but local personnel can access them.
EDIT is designed to overcome these two hurdles by providing a simple
interface for researchers to automatically convert data to a searchable,
semi-structured format, and then share this data in a secure but
accessible manner to the rest of the research community. |
Advisor: Dr. James Lu, Associate Professor, Emory University Key Topics: Natural Language Processing, Security, Software Engineering, Bio-Informatics |
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Summer '05 Computer Science Applications for Medicine
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The rapid
worldwide deployment of the Internet and Web is the enabler of a new
generation of e-healthcare applications, but the provision of a security
architecture that can ensure the privacy and security of sensitive
healthcare data is still an open question. This project made use of web
services and biometric (fingerprint, iris scan, signature recognition)
and digital (etoken, RFID, PIN generators) approaches to security. |
Advisor: Dr. Alfred Weaver, Professor, University of Virginia Key Topics: Security, Web Services, Bio-Informatics |
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Spring '05 Designing an Automatic Graphics API for Introductory Computer Science Classrooms
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Computer Science educators are constantly looking for new ways to utilize technology in the pursuit of helping students learn the concepts needed for success. Even simple ideas can be difficult for students to comprehend without some form of visual aide. To solve this problem, we designed and implemented a simple programming API whereby visualizations can be added to an educators programming examples to display control graphs, memory contents, and data structures as the program executes. |
Advisor: Dr. Jeffery Peden, Associate Professor, Longwood University Key Topics: Graphics, Computer Science Education, Human-Computer Interaction |
