Curriculum vitae

Name Surname Viktoras Chadyšas
Education
Institution Qualification, academic degree, academic title Year
Vilnius Gediminas Technical University Bachelor of Informatics: information technology and statistics specialist 2003
Vilnius Gediminas Technical University Master of Applied Statistics: data analysis specialist 2005
Vilnius Gediminas Technical University Natural PhD: mathematician 2010
Work experience
Employer Occupation Period
Vilnius Gediminas Technical University Assistant / Lecturer / Associate Professor 2005--
UAB "Mediafon Technology" Data Analyst 2018-2020
Main publications, monographs, art works, patents
Field of Science Publications Year
N 001 Palionis Eimantas; Chadyšas Viktoras, Metodai sporto komandoms reitinguoti // Lithuanian Journal of Statistics, Vilnius : Lietuvos statistikų sąjunga; Lietuvos Statistikos departamentas. ISSN 1392-642X. Vol. 54, no. 1 (2015) p. 84-91. 2015
N 001 Kasparavičiūtė Aurelija, Chadyšas Viktoras, Matematikos mokymas nuotolinėse studijose // Lietuvos matematikos rinkinys, Vilnius : VU Matematikos ir informatikos institutas. ISSN 0132-2818. T. 56 (2015) p. 57-62. 2015
N 001 Chadyšas Viktoras, Krapavickaitė Danutė, Estimation of the current population total for a four-phase sampling design // Nonlinear analysis: modelling and control, Vilnius : Institute of Mathematics and Informatics. ISSN 1392-5113. Vol. 21, no. 2 (2016) p. 241-260. 2016
N 001; S 003 Remeikienė, Rita; Rozsa, Zoltan; Gasparėnienė, Ligita; Chadyšas, Viktoras; Ginevičius, Romualdas. Regional estimates of the shadow economy in Lithuania // Inžinerinė ekonomika = Engineering economics. Kaunas : KTU. ISSN 1392-2785. eISSN 2029-5839. 2018, vol. 29, iss. 4, p. 386-396. DOI: 10.5755/j01.ee.29.4.19438. [DOAJ; VINITI; Scopus; CEEOL – Central and Eastern European Online Library; Social Sciences Citation Index (Web of Science); Business Source Complete] [M.kr.: N 001,S 003] [Citav. rod.: 0,730 (2018, InCites JCR SSCI)] [Aut. ind.: 0,200] 2018
S 004; N 001 Remeikienė, Rita; Gasparėnienė, Ligita; Chadyšas, Viktoras; Cepel, Martin. Identification of the shadow economy determinants for the Eurozone member states: application of the MIMIC model // Journal of business economics and management. Vilnius : VGTU Press. ISSN 1611-1699. eISSN 2029-4433. 2018, vol. 19, iss. 6, p. 777-796. DOI: 10.3846/jbem.2018.6276. [Scopus; Social Sciences Citation Index (Web of Science); Business Source Complete; ICONDA] [M.kr.: S 004,N 001] [Citav. rod.: 1,855 (2018, InCites JCR SSCI)] [Aut. ind.: 0,250] 2018
N 001; T 004 Valentukevičienė, Marina; Bagdžiūnaitė-Litvinaitienė, Lina; Chadyšas, Viktoras; Litvinaitis, Andrius. Evaluating the impacts of integrated pollution on water quality of the trans-boundary Neris (Viliya) River // Sustainability. Basel : MDPI. eISSN 2071-1050. 2018, vol. 10, iss. 11, art. no. 4239, p. 1-19. DOI: 10.3390/su10114239. [DOAJ; EconPapers; Scopus; AGORA; Social Sciences Citation Index (Web of Science); INSPEC; Chemical abstracts; CAB Abstracts; Science Citation Index Expanded (Web of Science)] [M.kr.: N 001,T 004] [Citav. rod.: 2,592 (2018, InCites JCR SCIE); Citav. rod.: 2,592 (2018, InCites JCR SSCI)] [Aut. ind.: 0,250] 2018
S 004; N 001 Gasparėnienė, Ligita; Remeikienė, Rita; Sadeckas, Alius; Chadyšas, Viktoras. A preference for corporate borrowing in alternative markets over borrowing from banks under the impact of monetary policies: a Lithuanian case // Economic research-ekonomska istraživanja. Abingdon : Taylor & Francis. ISSN 1331-677X. eISSN 1848-9664. 2019, vol. 32, iss. 1, p. 1903-1921. DOI: 10.1080/1331677X.2019.1638288. [DOAJ; CABI Abstracts; Scopus; Social Sciences Citation Index (Web of Science)] [M.kr.: S 004,N 001] [Citav. rod.: 2,229 (2019, InCites JCR SSCI)] [Aut. ind.: 0,250] 2019
S 001; S 004 Remeikienė, Rita; Gasparėnienė, Ligita; Chadyšas, Viktoras; Raistenskis, Evaldas. Links between corruption and quality of life in European Union // Entrepreneurship and sustainability issues. Vilnius : Entrepreneusrhip and Sustainability Center. eISSN 2345-0282. 2020, vol. 7, iss. 4, p. 2664-2675. DOI: 10.9770/jesi.2020.7.4(7). [DOAJ; Emerging Sources Citation Index (Web of Science); EconPapers; EconBiz] [M.kr.: S 001,S 004] [Aut. ind.: 0,250] 2020
N 001; N 009; T 007 Bugajev Andrej; Kriauzienė Rima; Vasilecas Olegas; Chadyšas Viktoras. The impact of churn labelling rules on churn prediction in telecommunications. Informatica. Vilnius: Vilnius University Institute of Data Science and Digital Technologies. ISSN 0868-4952. vol. 33, iss. 2 (2022), p. 247-277. [M.kr.:N 001; N 009; T 007] [Aut.lankų sk.: 2.214] 2022
N 001; N 009 Chadyšas Viktoras; Bugajev Andrej; Kriauzienė Rima; Vasilecas Olegas. Outlier analysis for telecom fraud detection. Digital business and intelligent systems. 15th International Baltic Conference, Baltic DB&IS 2022, Riga, Latvia, July 4–6, 2022 : proceedings. Cham: Springer, 2022. ISBN 9783031098499, p. 219-231. [M.kr.:N 001; N 009] [Aut.lankų sk.: 0.929] 2022
T 004; N 001 Valentukevičienė, Marina; Andriulaitytė, Ieva; Chadyšas, Viktoras. Assessment of residual chlorine interaction with different microelements in stormwater sediments // Molecules: Cross-Field Chemistry. Basel : MDPI. ISSN 1420- 3049. eISSN 1420-3049. 2023, vol. 28, iss. 14, art. no. 5358, p. 1-12. DOI: 10.3390/molecules28145358. [Science Citation Index Expanded (Web of Science); Scopus; PubMed] [M.kr.: T 004,N 001] [IF: 4,200; AIF: 5,650; kvartilis: Q2 (2023, Clarivate JCR SCIE)] [CiteScore: 7,40; SNIP: 1,064; SJR: 0,744; kvartilis: Q1 (2023, Scopus Sources)] [Aut. ind.: 0,333] 2023
N 001; N 009 Bugajev Andrej; Kriauzienė Rima; Chadyšas Viktoras. Realistic data delays and alternative inactivity definitions in telecom churn: Investigating concept drift using a sliding-window approach. Applied sciences. Basel: MDPI. ISSN 2076-3417. vol. 15, iss. 3 (2025), p. 1-26[Aut.lankų sk.: 1.857] 2025
Participation in conferences
Date Title of the conference and speech title
2005-01-01 Workshop on survey sampling theory and methodology, Vilnius : Statistics Lithuania, 2005. Bias investigation of two estimators of the ratio.
2008-01-01 Baltic-Nordic workshop on Survey sampling theory and methodology. August 25-29, 2008. Kuressaare, Estonia. Estimators of quantile rotated sample design.
2009-01-01 Proceedings of the Baltic-Nordic-Ukrainian summer school on survey statistics. August 23-27, 2009. Kyiv, Ukraine, Kyiv. Estimation of total using auxiliary information.
2012-01-01 Workshop of Baltic-Nordic-Ukrainian Network on Survey Statistics, Riga : University of Latvia, 2012. Accuracy investigation of the composite estimators in the case of sample rotation for two-phase sampling scheme.
2015-01-01 Studijos šiuolaikinėje visuomenėje 2015, Šiauliai : VšĮ Šiaurės Lietuvos kolegija. Matematikos mokymas nuotolinėse studijose.
2015-06-16 Lietuvos matematikų draugijos LVI konferencija. 2015, Kaunas : KTU. Matematikos mokymas nuotolinėse studijose.
2016-06-20 Lietuvos matematikų draugijos LVII konferencija. 2016, Vilnius: VGTU. Matematikos mokymo skirtingose studijose palyginamoji analizė.
2022-07-06 15th International Baltic Conference on Digital Business and Intelligent Systems (DB&IS 2022) held in Riga, Latvia from July 4 to 6, 2022. Outlier Analysis for Telecom Fraud Detection.
Foreign languages
A1/2: beginner; B1/2: advanced user; C1/2: proficient user;
Speaking Understanding Writing
English B1 B1 B1
russian B2 C1 A2
Teaching subjects
Level of studies Subject title
Master Degree Studies Analysis of Textual Data
Master Degree Studies Programming for FinTech (with course project)
Bachelor Degree Studies Programming in Python
Bachelor Degree Studies Differential Calculus
Bachelor Degree Studies Fundamentals of Mathematical Analysis
Bachelor Degree Studies Analytic Geometry and Elements of Vector Algebra
Bachelor Degree Studies Probability Theory and Mathematical Statistics
Bachelor Degree Studies Algebra and Differential Calculus
Bachelor Degree Studies Algebra and Mathematical Analysis
Bachelor Degree Studies Linear Algebra and Mathematical Analysis
Bachelor Degree Studies Linear Algebra and Essential Analysis
Bachelor Degree Studies Integral Calculus
Bachelor Degree Studies Data Analysis with Python
Improvement of qualification (internships, lasting more than two weeks, trainings, seminars, not less than 8
Institution Country Subject Period
Örebro University Sweden Analysis of Longitudinal Data and Survey Methodology 2007-2007
Stockholm University Sweden Survey Methodology 2008-2008
Vilnius Gediminas Technical University Lithuania eLearning 2014-2014
Vilnius University Lithuania Open and eLearning courses design and implementation 2016-2016
Participation in projects
Period Project description
2020-2022 Project "Smart management platform for eSIM devices Nr. 01.2.1-LVPA-K-856-01-0109"
Membership in international organizations, committees, expert activity, participation in editorial boards
Period Title
2006-- A member of the Society of Lithuanian Mathematicians
Other activities
Chairman of the board of the running club BMK "Inžinerija"