27 citations · 45 across the 25 of their papers we have counts for
28 papers
Assessing the Reproducibility of Machine-learning-based Biomarker Discovery in Parkinson's Disease
Ali Amelia, Lourdes Pena-Castillo, Hamid Usefi
Genome-Wide Association Studies (GWAS) help identify genetic variations in people with diseases such as Parkinson's disease (PD), which are less common in those without the disease…
Unsupervised Liu-type Shrinkage Estimators for Mixture of Regression Models
Elsayed Ghanem, Armin Hatefi, Hamid Usefi
In many applications (e.g., medical studies), the population of interest (e.g., disease status) comprises heterogeneous subpopulations. The mixture of probabilistic regression mode…
Liu-type Shrinkage Estimators for Mixture of Logistic Regressions: An Osteoporosis Study
Elsayed Ghanem, Armin Hatefi, Hamid Usefi
The logistic regression model is one of the most powerful statistical methods for the analysis of binary data. The logistic regression allows to use a set of covariates to explain…
Clustering, multicollinearity, and singular vectors
Hamid Usefi
Let be a matrix with its pseudo-matrix and set . We prove that, after re-ordering the columns of , the matrix has a block-diagonal form w…
Detecting ulcerative colitis from colon samples using efficient feature selection and machine learning
Hanieh Marvi Khorasani, Hamid Usefi, Lourdes Peña-Castillo
Ulcerative colitis (UC) is one of the most common forms of inflammatory bowel disease (IBD) characterized by inflammation of the mucosal layer of the colon. Diagnosis of UC is base…
Solvability of Poisson algebras
Salvatore Siciliano, Hamid Usefi
Let be a Poisson algebra with a Lie bracket over a field $\F$ of characteristic . In this paper, the Lie structure of is investigated. In particular, if $…