63 Works

Uses for Random and Stochastic Input on Micron’s Automata Processor

Jack Wadden, Ke Wang, Mircea Stan & Kevin Skadron
Micron's Automata Processor (AP) is a configurable memory-based device, purpose-built to emulate a theoretical non-deterministic finite automata (NFA). While NFAs are not particularly suited for floating point computation, they are extremely powerful and effcient pattern matchers and have been shown to provide large speedups over traditional von Neumann execution for rule-based, data-mining applications. While these kernels like associative rule mining, Brill tagging, protein motif identification have seen impressive orders of magnitude speedups, the exact capabilities...

HotSpot 6.0: Validation, Acceleration and Extension

Runjie Zhang, Mircea Stan & Kevin Skadron
The challenge of removing the heat generated by microprocessors with reasonable cost has long been identified as a critical issue. As a matter of fact, the cooling constraint (a.k.a., thermal wall) has became a major hurdle that limits the scaling of operating frequency and transistor density. As a fast and accurate thermal model, HotSpot enables early-stage evaluation of chip temperature and therefore supports architectural study of dynamic thermal management strategies, chip floorplanning, and novel cooling...

Non-Academic Careers for STS Graduate Students: A Workshop Report

Rider Foley, Thomas Woodson & Matthem Harsh
Science, Technology & Society (STS ) graduate programs primarily train graduate students to work in academic jobs. Unfortunately, like many STEM fields, there are not enough academic jobs to match the supply of STS graduate students, nor does every STS graduate student want to become an academic. While this situation is not entirely recent, graduate students still do not receive adequate training or mentorship for careers outside of academia. Studies have shown that from 1998...

Charlottesville Foster Care Study

Michele Claibourn, Charlotte McClintock, Brago Aboagye-Nyame, Hannah Adams, Kathryn Bernard, Conor Boyle, Charlotte deButts, Jacqueline Hammaker, Alex Hendel, Carolynn McElroy, Rishabh Nagpal, Carolyn Ours, Anastasia Polkovnichenko & Savannah Quick
Building on the 2018 Charlottesville Child Welfare report, this study investigates racial disproportionality – over-representation of racial groups in the child welfare system relative to their presence in the population – and racial disparity – less favorable outcomes for some racial groups compared to others – for children interacting with the Charlottesville Department of Social Services over a three year period, from January 1, 2015 to December 31, 2017. We focus here on the child...

The Value of Green Building Technologies in Hotels: A Case Study on Denmark's Green Solution House

Hannah Bates
The hospitality industry currently faces significant sustainability issues given the resource-intensive nature of the industry. Hotels require significant amounts of water, electricity, heating and cooling to operate and produce substantial amounts of waste. However, with the rise of green building technologies comes the opportunity for environmentally, socially, and economically positive changes in hotel building design and operations. Green Solutions House, a four-star hotel and conference center in Denmark, was designed to be at the forefront...

What the Adult Training and Education Survey Tells Us About the Skilled Technical Workforce

Vicki Lancaster
The National Center for Education Statistics (NCES) fielded these questions in 2016 in their Adult Training and Education Survey (ATES). This paper looks at those ATES respondents whose education level is less than a Bachelor’s degree, have a postsecondary non-degree credential, and are using it in their current job (sample size = 6,960). Comparisons are made by further categorizing this subpopulation by their education level, high school or less, some college but no degree, and...

Architecture Implications of Pads as a Scarce Resource: Extended Results

Runjie Zhang, Ke Wang, Brett H. Meyer, Mircea R. Stan & Kevin Skadron
Due to non-ideal technology scaling, delivering a stable supply voltage is increasingly challenging. Furthermore, competition for limited chip interface resources (i.e., C4 pads) between power supply and I/O, and the loss of such resources to electromigration, means that constructing a power delivery network (PDN) that satisfies noise margins without compromising performance is and will remain a critical problem for architects and circuit designers alike. Simple guardbanding will no longer work, as the consequent performance penalty...

Charlottesville Child Welfare Study: Understanding Referral Disproportionality

Michele Claibourn
This report marks the third year of the Public Interest Data Labs work with the Charlottesville Department of Social Services (CDSS) on issues of disparities in child welfare. The current study expands upon the previous two research efforts with an increased focus on the origins of disproportionality in referrals, incorporating the impact of reporter types and neighborhood origin, and examines an additional outcome, the likelihood of re-referral. In seeking to gain a better understanding of...

Digital Collecting in Times of Crisis: 2018 LYRASIS Catalyst Fund recipient report

Kara McClurken, Elizabeth Mitchell & Jeremy Boggs
The University of Virginia Library applied for a 2018 Catalyst Fund grant to help cultural institutions and communities of all sizes be better prepared for and able to implement digital collecting strategies during and after rapidly evolving emergencies and/or community crises (such as controversies, natural disasters and public emergencies). Digital photos, videos, and social media content are major components of these community experiences, and collecting them as well as other materials (posters, ephemera, traditional media...

Leveraging External Data Sources to Enhance Official Statistics and Products

Sallie Keller, Stephanie Shipp, Mark Orr, David Higdon, Gizem Korkmaz, Aaron Schroeder, Emily Molfino, Bianica Pires, Kathryn Ziemer & Daniel H. Weinberg
The Census Bureau wants to understand how to leverage external data sources with traditional survey data and understand the effects on statistical data quality and standards of use resulting from incorporating external data. The Census Bureau tasked the Social and Decision Analytics Division, part of the Biocomplexity Institute of the University of Virginia, to address the question: how can we know if external data are useful for federal statistical needs? Today, the broad expansion of...

Assessing the Research Practices of Big Data and Data Science Researchers at the University of Virginia: An Ithaka S+R Local Report

Jennifer Huck & Jacalyn Huband
This report is an investigation of research practices of Big Data and Data Science Researchers at the University of Virginia (UVA). The study was conducted by a team of staff from the UVA Academic Library and UVA Research Computing (RC). Ithaka S+R, a not-for-profit research organization, oversaw this study, along with comparable studies at 20 other academic institutions. The goal of Ithaka S+R was to understand the resources and services that researchers who use Big...

Libra Electronic Thesis and Dissertation (ETD) Deposits: 2014 Statistics

Ellen Ramsey
This document shows statistics tracking immediate worldwide availability and embargo choices of doctoral and masters' students depositing theses and dissertations into Libra, the University of Virginia's institutional repository, in Spring 2014.

Prototype to Patient Treatment: Dialogue on Safety, Regulation, Privacy, Security, and Acceptability for Wearable Medical Devices — A Workshop Report

Rider Foley
Emerging technologies, such as wearable medical devices, can raise important societal concerns about regulation, privacy, safety, security, and acceptability. If left unresolved, these issues may stymie important technologies from reaching patients or result in unforeseen physical or emotional harms. It is not enough for early-stage research and development to generate fundamental knowledge and optimize technical operations without addressing societal issues, explicitly. Thus, organizations from across the medical device innovation ecosystem must work together to explore,...

Spatial Audit of Charlottesville Parks

Mikala Reiman, Chenjie Xiong, Taylor Kitchens, Sophia Woods, Mennen Middlebrooks, Rachel Moon & Xiaoxue Jiang
Charlottesville city parks provide its community members with areas of public space, outdoor recreation, and interactive play. However, the community served is primarily those of able-bodied individuals. This audit aims to identify the environmental and designed barriers of the community with limited mobility, navigating through exclusive playspaces of Charlottesville and the greater Albemarle area. A scorecard was designed to evaluate Charlottesville parks to analyze aspects of playspaces in parks that contribute to, or detract from,...

Cellular Automata on the Micron Automata Processor

Ke Wang & Kevin Skadron
A cellular automaton (CA) is a well-studied and widely used time-evolving discrete model. CAs are studied in many fields of science, such as computability theory, mathematics, physics, complexity science, theoretical biology and microstructure modeling. Some CA models have been proven to be Turing Complete, such as the elementary cellular automaton (ECA) of Rule-110 and Conways Game of Life. Micron's Automata Processor (AP) is a hardware implementation of non-deterministic finite automata (NFAs). The core feature of...

Architecture Review for Advancing Hyku Project

Rathin Sundar
This report is a deliverable of the Advancing Hyku: Open Source Institutional Repository Platform Development” project, funded by Arcadia—a charitable fund of philanthropists Lisbet Rausing and Peter Baldwin The purpose of this document is to review the architecture and design of the Hyku implementation of British library, with reference to the capabilities of the platform and requirements of the Library. The current implementation of Hyku for the British Library’s (BL) shared research repository project would...

Final Report for the Equity Audit of the Office for Sustainability

Ford Chandler, Matthew Palagyi, Tim Dodson, Insoo Jeon & Harrison Premen
This report describes the findings of an equity audit examining student-facing programming and communications of the University of Virginia’s Office for Sustainability. During the Spring 2021 semester, a research team at the University’s School of Architecture conducted a literature review, spoke with key stakeholders in the Office, and moderated a series of focus groups with students in an effort to understand a key question: How can the UVA Office for Sustainability measurably improve and incorporate...

Increasing Faculty Awareness of Open Access in 5 Minutes or Less

Ellen Ramsey
This paper provides ideas on increasing faculty awareness of scholarly communication issues.

Prefix Scan and Minimum Spanning Tree with OpenCL

Yixin Sun & Kevin Skadron
GPUs have been widely used to achieve wide data-parallelism to facilitate the execution of concurrent computations for performance and effciency. A lot of prior work have been done for CUDA, while OpenCL, as an open standard with the advantage of being able to run across multiple GPU platforms, still lacks development and effcient data primitives in its open standard libraries. This report discusses our work on constructing an effcient OpenCL implementation for parallel prefix scan...

IT – A Simple Parallel Language for Hierarchical Parallel Architectures

Muhammad Nur Yanhaona & Andrew Grimshaw
After several decades of continuous research and development of hundreds of parallel programming languages; the dominant mechanism of parallelism, unfortunately, remains to be low level threading or message passing libraries attached to sequential language cores. We are investigating an alternative parallel programming paradigm that strives to strike a balance between low-level, platform-specific programming such as in MPI, Pthreads, or CUDA; and high-level, hardware-agnostic language based approach such as in X10 or Chapel. The result is...

Advancing Hyku Community Survey Results

Ellen Ramsey & Ilkay Holt
Report on results of a survey seeking community contributions. Includes adjustments already made in response as well as findings impacting future work. Higher-resolution image of embedded chart is attached separately.

Libra Electronic Theses and Dissertation (ETD) Deposits: 2015 Statistics

Ellen Ramsey & Sherry Lake
This document shows statistics tracking immediate worldwide availability and embargo choices of doctoral and masters' students depositing theses and dissertations into Libra, the University of Virginia's institutional repository, in 2015.

IT: Machine Independent Programming on Hierarchically Nested Machines

Muhammad Yanhaona & Andrew Grimshaw
Andrews in his "Concurrent Programming: Principles and Practice" expresses that "concurrent programs are to sequential programs what chess is to checkers". We believe people experienced in both kinds of programming will largely agree to his statements. But what makes parallel programming so difficult? Although there are differences of opinions, none blames the difficulty of devising a parallel algorithm, as opposed to a sequential algorithm, as the core problem. It is true that construing a parallel...

Code of Best Practices in Fair Use for Software Preservation

Brandon Butler, Patricia Aufderheide, Peter Jaszi & Krista Cox
The Code of Best Practices in Fair Use for Software Preservation helps ensure that the subjects, products, and tools of scholarship will continue to be accessible despite evolving technology. The code expresses a consensus view of how fair use—the legal doctrine allowing the use of copyrighted materials without permission from the copyright holder under certain circumstances—applies to core, recurring situations in software preservation. Fair use has become an increasingly vital tool for permitting cultural heritage...


Rider Foley, Elise Barrella, Heather Kirkvold, Rodney Wilkins, Aaron Sloss, Elise Mazur, Claire Trevisan, Jacob Rogerson, Daniel Katleman, Catherine Mohan, Victoria Lindsey & Farrah Dang
The United States is in the midst of a transition in the production and distribution of energy. This transition was, in part, instigated by technological advancements and policy mechanisms that allowed for the recovery of unconventional fossil fuels from shale formations. In parallel, renewable energy sources such as wind and solar are becoming increasingly competitive with fossil fuels. Furthermore, the nation’s population is moving away from the Northeast and Midwest regions to southeastern and western...

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