Index Catalog // ScholarsArchive@OSU

Learning cost-sensitive diagnostic policies from data

Creator:: Zubek, Valentina Bayer
Abstract:: In its simplest form, the process of diagnosis is a decision-making process in which the diagnostician performs a sequence of tests culminating in a diagnostic decision. For example, a physician might perform a series of simple measurements (body tem- perature, weight, etc.) and laboratory measurements (white blood count, CT scan,...
Resource Type:: Dissertation
Full Text:: corrected_thesis.dvi AN ABSTRACT OF THE DISSERTATION OF Valentina

Complex patterns in gender HCI : a data mining study of factors leading to end-user debugging success for females and males

Creator:: Grigoreanu, Valentina I.
Abstract:: Most of the work so far in the subfield of Gender HCI has followed a theory-driven approach. Established theories, however, do not take into account specific issues that arise in end-user debugging. We suspected that there may be important information that we were overlooking. We therefore employed a methodology change:...
Resource Type:: Masters Thesis
Full Text:: OF THE THESIS OF Valentina Grigoreanu for the degree of Master of Science in Computer Science

Understanding and supporting end-user debugging strategies

Creator:: Grigoreanu, Valentina I.
Abstract:: End users' programs are fraught with errors, costing companies millions of dollars. One reason may be that researchers and tool designers have not yet focused on end-user debugging strategies. To investigate this possibility, this dissertation presents eight empirical studies and a new strategy-based end-user debugging tool for Excel, called StratCel....
Resource Type:: Dissertation
Full Text:: Valentina I. Grigoreanu for the degree of Doctor of Philosophy in Computer Science presented on December 1

AO* revisited

Creator:: Bayer-Zubek, Valentina and Dietterich, Thomas Glen
Abstract:: Preprint submitted to Elsevier Science 30 June 2004.
Resource Type:: Article
Full Text:: paper.dvi AO � Revisited Valentina Bayer Zubek �� Thomas G

Design implications for end-user debugging tools : a strategy-based view

Creator:: Grigoreanu, Valentina I., Burnett, Margaret, and Robertson, George
Abstract:: End-user programmers’ code (e.g., accountants’ spreadsheet formulas) is fraught with errors. To help mitigate this problem, end-user software engineering research is becoming established. However, most of this work has focused on feature usage, rather than debugging strategies. If a debugging tool were to support end-user programmers’ specific debugging strategy needs,...
Resource Type:: Technical Report
Full Text:: for End-User Debugging Tools: A Strategy-Based View Valentina Grigoreanu, Margaret Burnett

A strategy-centric approach to the design of end-user debugging tools

Creator:: Grigoreanu, Valentina I., Burnett, Margaret, and Robertson, George
Abstract:: End-user programmers’ code is notoriously buggy. This problem is amplified by the increasing complexity of end users’ programs. To help end users catch errors early and reliably, we employ a novel approach for the design of end-user debugging tools: a focus on supporting end users’ effective debugging strategies. This paper...
Resource Type:: Technical Report
Full Text:: Approach to the Design of End-User Debugging Tools Valentina Grigoreanu, Margaret Burnett Oregon

Learning diagnostic policies from examples by systematic search

Creator:: Oregon State University. Dept. of Computer Science and Zubek, Valentina Bayer
Abstract:: A diagnostic policy species what test to perform next based on the results of previous tests and when to stop and make a diagnosis. Cost-sensitive diagnostic policies perform tradeoffs between (a) the costs of tests and (b) the costs of misdiagnoses. An optimal diagnostic policy minimizes the expected total cost....
Resource Type:: Research Paper
Full Text:: Systematic Search Valentina Bayer�Zubek School of Electrical Engineering and Computer Science Oregon State

Integrating learning from examples into the search for diagnostic policies

Creator:: Oregon State University. Dept. of Computer Science, Bayer-Zubek, Valentina, and Dietterich, Thomas Glen
Abstract:: This paper studies the problem of learning diagnostic policies from training examples. A diagnostic policy is a complete description of the decision-making actions of a diagnostician (i.e., tests followed by a diagnostic decision) for all possible combinations of test results. An optimal diagnostic policy is one that minimizes the expected...
Resource Type:: Research Paper
Full Text:: ∗ Valentina Bayer-Zubek bayer@cs.orst.edu Thomas G. Dietterich tgd@cs.orst.edu School of Electrical

A POMDP approximation algorithm that anticipates the need to observe

Creator:: Oregon State University. Dept. of Computer Science, Bayer, Valentina, and Dietterich, Thomas Glen
Abstract:: This paper introduces the even-odd POMDP, an approximation to POMDPs in which the world is assumed to be fully observable every other time step. The even-odd POMDP can be converted into an equivalent MDP, the 2MDP, whose value function, V*[subscript 2MDP], can be combined online with a 2-step lookahead search...
Resource Type:: Research Paper
Full Text:: Observe Valentina Bayer bayer@cs.orst.edu Thomas Dietterich tgd@cs.orst.edu Department of Computer

A POMDP approximation algorithm that anticipates the need to observe

Creator:: Oregon State University. Dept. of Computer Science, Zubek, Valentina Bayer, and Dietterich, Thomas Glen
Abstract:: This paper introduces the even-odd POMDP an approximation to POMDPs Partially Observable Markov Decision Problems in which the world is assumed to be fully observable every other time step. This approximation works well for problems with a delayed need to observe. The even-odd POMDP can be converted into an equivalent...
Resource Type:: Research Paper
Full Text:: Need to Observe Valentina Bayer Zubek and Thomas Dietterich Department of Computer Science� Oregon

Two heuristics for solving POMDPs having a delayed need to observe

Creator:: Oregon State University. Dept. of Computer Science, Zubek, Valentina Bayer, and Dietterich, Thomas Glen
Abstract:: A common heuristic for solving Partially Observable Markov Decision Problems POMDPs is to first solve the underlying Markov Decision Process MDP and then construct a POMDP policy by performing a fixed depth lookahead search in the POMDP and evaluating the leaf nodes using the MDP value function. A problem with...
Resource Type:: Research Paper
Full Text:: Need to Observe Valentina Bayer Zubek and Thomas Dietterich bayer�cs�orst�edu tgd�cs�orst�edu

Females' and males' end-user debugging strategies : a sensemaking perspective

Creator:: Grigoreanu, Valentina I., Burnett, Margaret, Wiedenbeck, Susan, Cao, Jill, and Rector, Kyle
Abstract:: Although there have been decades of research into how professional programmers debug, only recently has work begun to emerge about how end-user programmers attempt to debug their programs. Without understanding how end-user programmers approach debugging, we cannot build tools to adequately support their needs. To help fill this need, this...
Resource Type:: Technical Report
Full Text:: - Females’ and Males’ End-User Debugging Strategies: A Sensemaking Perspective VALENTINA GRIGOREANU

Gender differences in end-user debugging strategies

Creator:: Oregon State University. Dept. of Computer Science, Beckwith, Laura A., Grigoreanu, Valentina I., Subrahmaniyan, Neeraja, Wiedenbeck, Susan, Burnett, Margaret, 1947-, Cook, Curtis R., Bucht, Karin, and Drummond, Russell
Abstract:: Little is known about the strategies end-user programmers use in debugging their programs, and even less is known about gender differences that may exist in these strategies. Without this type of information, end-user programming systems cannot know the "target" at which to aim, if they are to support male and...
Resource Type:: Research Paper
Full Text:: Laura Beckwith*, Valentina Grigoreanu*, Neeraja Subrahmaniyan*, Susan Wiedenbeck†, Margaret Burnett

Methods for cost-sensitive learning

Creator:: Margineantu, Dragos D.
Abstract:: Many approaches for achieving intelligent behavior of automated (computer) systems involve components that learn from past experience. This dissertation studies computational methods for learning from examples, for classification and for decision making, when the decisions have different non-zero costs associated with them. Many practical applications of learning algorithms, including transaction...
Resource Type:: Dissertation
Full Text:: , bagged lazy option trees (B-LOTs), that gives better probability estimates than any previous method

Gender differences in end-user debugging strategies

Creator:: Narayanan, Vaishnavi
Abstract:: There has been little prior research reporting strategy usage in end-user problem solving, and even less using gender as a factor. Without this type of information, enduser programming systems cannot know the “target” at which to aim, if they are to support male and female end-user programmers’ debugging. As a...
Resource Type:: Masters Thesis
Full Text:: . Laura Beckwith, Neeraja Subrahmaniyan, Valentina Grigoreanu, Joey Lawrance and Flora Tan for their

Supporting end-user debugging : what do users want to know?

Creator:: Oregon State University. Dept. of Computer Science, Kissinger, Cory, Burnett, Margaret, 1949-, Stumpf, Simone, Subrahmaniyan, Neeraja, Beckwith, Laura A., Yang, Sherry, and Rosson, Mary Beth
Abstract:: Although researchers have begun to explicitly support end-user programmers' debugging by providing information to help them find bugs, there is little research addressing the right content to communicate to these users. The specific semantic content of these debugging communications matters because, if the users are not actually seeking the information...
Resource Type:: Research Paper
Full Text:: , Curtis Cook, and John Pane for advice, ideas, and feedback. We also thank Valentina Grigoreanu and

Toward end-user debugging of machine-learned programs

Creator:: Kulesza, Todd
Abstract:: The results of a machine learning from user behavior can be thought of as a program, and like all programs, it may need to be debugged. Providing ways for the user to debug it matters because without the ability to fix errors, users may find that the learned program’s errors...
Resource Type:: Masters Thesis
Full Text:: have been similarly supportive, both in and out of the lab. In particular, Chris Bogart, Valentina

Scientists' perspectives on the importance of scientific communication in natural resource decision-making

Creator:: Shaw, Christine Michelle
Abstract:: Natural resource decisions require consideration at many levels, ranging from how one invertebrate will be affected by a nearby road, to how an entire watershed will be transformed by a massive clearcut. Considerations reach farther than just the local ecological community-human communities, economies, and future impacts on the communities and...
Resource Type:: Masters Thesis
Full Text:: progressed through this program with me. Laura White, Jim Wilton, Valentina Fomenko, Sally Duncan, Chad

Supporting end-user debugging

Creator:: Kissinger, Cory
Abstract:: Although researchers have begun to explicitly support end-user programmers’ debugging by providing information to help them find bugs, there is little research addressing the right content to communicate to these users. The specific semantic content of these debugging communications matters because, if the users are not actually seeking the information...
Resource Type:: Masters Thesis
Full Text:: Subrahmaniyan and Dr. Sherry Yang. I would also like to thank Valentina Grigoreanu and Vaishnavi Narayanan for

Trade and productivity effects on firm behavior : the case of Korean manufacturing

Creator:: Kim, Sooil
Abstract:: This dissertation’s three essays investigate trade and productivity effects on firm behavior based on new heterogeneous-firms trade models in the case of Korea. In the first essay, firms’ decision to export in the case of Korean manufacturing industries is examined, where the change in firms’ productivity before and after exports...
Resource Type:: Dissertation

International comparison and evaluation of agricultural productivity growth

Creator:: Rada, Nicholas E.
Abstract:: Long-run food price changes respond to long-run changes in food demand, quasi-fixed and variable production factors, and agricultural productivity. Recent global food-price volatility puts a renewed spotlight on the trends and sources of any agricultural productivity growth. Because food prices’ most critical effects are on human hunger, it is especially...
Resource Type:: Dissertation
Full Text:: ……………………….………………... 99 Appendix B: Brazilian Empirical Results…………………….…………………… 109

Information foraging in debugging

Creator:: Lawrance, Joseph A.
Abstract:: Programmers spend a substantial fraction of their debugging time by navigating through source code, yet little is known about how programmers navigate. With the continuing growth in size and complexity of software, this fraction of time is likely to increase, which presents challenges to those seeking both to understand and...
Resource Type:: Dissertation
Full Text:: (Paul Cull, Carlos Jensen, Christine Wallace, Surabh Setia, Valentina Grigoreanu, Stephen

Explaining debugging strategies to end-user programmers

Creator:: Subrahmaniyan, Neeraja
Abstract:: There has been little research into how end-user programming environments can provide explanations that could fill a critical information gap for end-user debuggers – help with debugging strategy. To address this need, we designed and prototyped a video-based approach for explaining debugging strategy, and accompanied it with a text-only approach....
Resource Type:: Masters Thesis
Full Text:: . My warm gratitude to all my research colleagues—Laura Beckwith, Valentina Grigoreanu, Joey

Analysis of Bayesian anytime inference algorithms

Creator:: Burgess, Scott Alan
Abstract:: This dissertation explores and analyzes the performance of several Bayesian anytime inference algorithms for dynamic influence diagrams. These algorithms are compared on the On-Line Maintenance Agent testbed, a software artifact permitting comparison of dynamic reasoning algorithms used by an agent on a variety of simulated maintenance and monitoring tasks. Analysis...
Resource Type:: Dissertation
Full Text:: ................................................. 100 Appendix B: Raw Data for Experiments with the Peaked Backward Simulation Algorithm

Radiation effects in III-V semiconductors and heterojunction bipolar transistors

Creator:: Shatalov, Alexei
Abstract:: The electron, gamma and neutron radiation degradation of III-V semiconductors and heterojunction bipolar transistors (HBTs) is investigated in this thesis. Particular attention is paid to InP and InGaAs materials and InP/InGaAs abrupt single HBTs (SHBTs). Complete process sequences for fabrication of InP/InGaAs HBTs are developed and subsequently employed to produce...
Resource Type:: Dissertation
Full Text:: Valentina Shatalov, for their love, support, and understanding throughout the years of my studies at OSU

Gender HCI issues in end-user programming

Creator:: Beckwith, Laura A.
Abstract:: Until recently, research has not considered whether the design of end-user programming environments, such as spreadsheets, multimedia authoring languages, and CAD systems, affects males and females differently. As a result, we began investigating how the two genders are impacted by end-user programming software and whether attention to gender differences is...
Resource Type:: Dissertation
Full Text:: , Shraddha Sorte, Valentina Grigoreanu, Vaishnavi Narayanan, Kyle Rector, Derek Inman, Neeraja

Model-based approximation methods for reinforcement learning

Creator:: Wang, Xin
Abstract:: The thesis focuses on model-based approximation methods for reinforcement learning with large scale applications such as combinatorial optimization problems. First, the thesis proposes two new model-based methods to stablize the value–function approximation for reinforcement learning. The first one is the BFBP algorithm, a batch-like reinforcement learning process which iterates between...
Resource Type:: Dissertation
Full Text:: , encouragement, and help during the first couple of years, and Bill Langford, Valentina Bayer Zubek, and Dragos

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