doc. RNDr. Dušan Knop, Ph.D.

Projects

Anonymizing of User Data: A Parameterized Perspective

Program
Projects of the Ministry of Education, Youth and Sports not included in the CEP
Provider
Ministry of Education, Youth and Sports
Period
2022
Description
When collecting user data nowadays we care about these being sufficiently anonymous, that is, we usually replace the real data with some perturbed data so that we protect the sole identity of the end-user. This is a challenging task both from computational and algorithmical (theoretic) approach. Therefore we often have to employ advanced methods of analysis and algorithmic techniques to identify tractable cases. We will identify new paramaters that attain low values in realworld data and analyze if these result in fixed-parameter tractable case or to parameterized hardness.

FIT - Fioravantes, Foivos

Period
2022 - 2024
Description
Fixed-parameter tractability and approximation algorithms are nowadays standard tools for design of algorithms for hard problems in the area of Computational Social Choice. Surprisingly, kernelization, a prominent technique in FPT algorithmics, is not used as often to tackle social choice problems. Kernelization is a formalism of safe data reduction which we believe does have its place in all research disciplines dealing with large and complex datasets. The most recent approach is the so-called lossy kernelization which on the one hand cooperates with approximation algorithms (unlike kernelization which can only be pipelined with exact algorithms) and on the other hand, allows circumventing hardness results (in exchange for introducing a possible loss in the quality of the solution).

Mobility ČVUT MSCA-F-CZ-III

Program
Programme Johannes Amos Comenius
Provider
European Commission
Code
, CZ.02.01.01/00/22_010/0008601
Period
2024 - 2026
Description
V souladu s výzvou projekt umožní mezinárodní mobilitu výzkumným pracovníkům, kterým byl v minulých letech schválen projekt Horizont 2020 z programu Marie Skłodowska-Curie Individual / Postdoctoral Fellowships, jež dosáhl hodnocení alespoň 70 %, ale z důvodů nedostatku financí byl zařazen do kategorie tzv. no-money projektů. Projekt bude realizován pracovními pobyty zahraničních VP na ČVUT. Hlavním cílem projektu je podpora profesního růstu výzkumných pracovníků, kvalitního výzkumu, vzdělávání pro praxi a rozvoje komunikace a spolupráce. Na FIT se jedná o příjezdovou mobilitu na 24 měsíců výzkumného pracovníka, Foivos Fioravantes Ph.D., z Francie. Školitel je doc. Ing. Dušan Knop, Ph.D.

New Frontiers in Computational Social Choice

Program
Standard projects
Provider
Czech Science Foundation
Code
GA22-19557S
Period
2022 - 2024
Description
Fixed-parameter tractability and approximation algorithms are nowadays standard tools for design of algorithms for hard problems in the area of Computational Social Choice. Surprisingly, kernelization, a prominent technique in FPT algorithmics, is not used as often to tackle social choice problems. Kernelization is a formalism of safe data reduction which we believe does have its place in all research disciplines dealing with large and complex datasets. The most recent approach is the so-called lossy kernelization which on the one hand cooperates with approximation algorithms (unlike kernelization which can only be pipelined with exact algorithms) and on the other hand, allows circumventing hardness results (in exchange for introducing a possible loss in the quality of the solution). This project aims on filling this gap of usage of these tools in computational social choice. The suggested line of research continues our current studies in this area and the new proposed directions will need novel algorithmic approaches as they focus on the boundaries of traceability. We have identified several interesting questions where there is potential to apply the above. Our aim is to significantly deepen our understanding of these computationally hard problems by providing polynomial-sized (lossy) kernels or showing that the problems are resistant to this line of attack.

New Frontiers in Computational Social Choice

Program
Projekty podpořené z ČR (pracovní kód k dodatečnému upřesnění)
Provider
Another domestic provider
Period
2022
Description
New Frontiers in Computational Social Choice

Structural Approaches in Stability Under Diversity Constraints

Program
Promoting the mobility of researchers and workers in the framework of international cooperation in R&D
Provider
Ministry of Education, Youth and Sports
Code
8J21AT021
Period
2021 - 2022
Description
Výpočetní kolektivní volba (Computational Social Choice) je moderní oblast informatiky, ve které se setkává teoretická informatika a teorie her (ekonomie). Mnoho zásadních problémů v této oblasti je NP-těžkých, proto se začala v poslední dekádě stále častěji uplatňovat tzv. parametrizovaná analýza, která si klade za cíl identifikovat parametry, jejichž zafixování na malých hodnotách vede k efektivní řešitelnosti daného problému. V předkládaném projektu se hodláme zaměřit na strukturální parametry (mezi nejznámější bezpochyby patří stromová šířka) vstupních instancí, čímž omezíme například vzájemnou interakci mezi agenty hledajícími kolektivní rozhodnutí a podobně.