Joni Virta
Academy Research Fellow/Assistant Professor
jomivi@utu.fi +358 29 450 4321 +358 50 350 9623 Office: 262 ORCID identifier: https://orcid.org/0000-0002-2150-2769 |
Dimension reduction; Multivariate statistics; Asymptotic statistics
Robust non-linear multivariate methods
I obtained my PhD in Statistics from University of Turku in 2018 under the supervision of Hannu Oja, Klaus Nordhausen and Bing Li. In 2018-2019 I worked as a postdoctoral researcher in the Department of Mathematics and Systems Analysis in Aalto University School of Science and received also the title of docent from there. Between 2019-2022 I worked as an Academy of Finland Postdoctoral Researcher first in Aalto and later in Turku.
Since September 2022 I have been working at Department of Mathematics in the dual role of Academy Research Fellow and Assistant Professor (with specialization in the theoretical foundations of statistics).
My current main research area is robust non-linear methodology, which I study under my Academy Research Fellow project. In addition, my research emphasizes the modification of classical multivariate methodology (such as PCA) to work under non-standard forms of data (images, function, spatial data) and the asymptotic theory related to these questions.
Between 2022-2027 my amount of teaching will be small because of my role as an Academy Research Fellow. However, I still teach, e.g, Advanced Multivariate Methods during this period.
- Large-sample properties of blind estimation of the linear discriminant using projection pursuit (2021)
- Electronic Journal of Statistics
(A1 Refereed original research article in a scientific journal) - On the behavior of extreme d-dimensional spatial quantiles under minimal assumptions (2021) Advances in Contemporary Statistics and Econometrics: Festschrift in Honor of Christine Thomas-Agnan Paindaveine Davy, Virta Joni
(A3 Refereed book chapter or chapter in a compilation book) - Testing for subsphericity when n and p are of different asymptotic order (2021)
- Statistics and Probability Letters
(A1 Refereed original research article in a scientific journal) - Fast tensorial JADE (2020)
- Scandinavian Journal of Statistics
(A1 Refereed original research article in a scientific journal) - Independent component analysis for multivariate functional data (2020)
- Journal of Multivariate Analysis
(A1 Refereed original research article in a scientific journal) - Minimum Distance Index for BSS, Generalization, Interpretation and Asymptotics (2020)
- Austrian Journal of Statistics
(A1 Refereed original research article in a scientific journal) - Spatial Blind Source Separation (2020)
- Biometrika
(A1 Refereed original research article in a scientific journal) - Independent component analysis for non-standard data structures (2018) Virta Joni
(G5 Article dissertation ) - JADE for Tensor-Valued Observations (2018)
- Journal of Computational and Graphical Statistics
(A1 Refereed original research article in a scientific journal) - On the number of signals in multivariate time series (2018)
- Lecture Notes in Computer Science
(A4 Refereed article in a conference publication )



