Dimitrios Gkenosis

dblp:222/3060 · DBLP profile ↗
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2ranked-venue papers
2as first author
1since 2021 · last 2022
—ORCID · none

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Theory of computation · 2 · 2 first-author · 1 since 2021
YearPublicationVenuePosition
2022 The Stochastic Boolean Function Evaluation problem for symmetric Boolean functions
Dimitrios Gkenosis, Nathaniel Grammel, Lisa Hellerstein, Devorah Kletenik
Discret. Appl. Math.1
2018 The Stochastic Score Classification Problem
abstract
Consider the following Stochastic Score Classification Problem. A doctor is assessing a patient's risk of developing a certain disease, and can perform n tests on the patient. Each test has a binary outcome, positive or negative. A positive result is an indication of risk, and a patient's score is the total number of positive test results. Test results are accurate. The doctor needs to classify the patient into one of B risk classes, depending on the score (e.g., LOW, MEDIUM, and HIGH risk). Each of these classes corresponds to a contiguous range of scores. Test i has probability p_i of being positive, and it costs c_i to perform. To reduce costs, instead of performing all tests, the doctor will perform them sequentially and stop testing when it is possible to determine the patient's risk category. The problem is to determine the order in which the doctor should perform the tests, so as to minimize expected testing cost. We provide approximation algorithms for adaptive and non-adaptive versions of this problem, and pose a number of open questions.
Dimitrios Gkenosis, Nathaniel Grammel, Lisa Hellerstein, Devorah Kletenik
ESA1