Mădălina Olteanu
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View article: Dynamics of tumor evolution after Gamma Knife radiosurgery for sporadic vestibular schwannoma: Defining volumetric patterns characterizing individual trajectory
Dynamics of tumor evolution after Gamma Knife radiosurgery for sporadic vestibular schwannoma: Defining volumetric patterns characterizing individual trajectory Open
Background The definition of tumor control and treatment failure after Gamma Knife radiosurgery (GKRS) for vestibular schwannoma (VS) is still debated. The lack of knowledge on the dynamics of tumor evolution can lead to misinterpretation …
View article: Interactions between Cognitive, Affective, and Respiratory Profiles in Chronic Respiratory Disorders: A Cluster Analysis Approach
Interactions between Cognitive, Affective, and Respiratory Profiles in Chronic Respiratory Disorders: A Cluster Analysis Approach Open
This study conducted at Leamna Pulmonology Hospital investigated the interrelations among cognitive, affective, and respiratory variables within a cohort of 100 patients diagnosed with chronic respiratory conditions, utilizing sophisticate…
View article: Sparse k-means for mixed data via group-sparse clustering
Sparse k-means for mixed data via group-sparse clustering Open
The present manuscript tackles the issue of variable selection for clustering, in high dimensional data described both by numerical and categorical features. First, we build upon the sparse k-means algorithm with lasso penalty, and introdu…
View article: Sparse and group-sparse clustering for mixed data An illustration of the vimpclust package
Sparse and group-sparse clustering for mixed data An illustration of the vimpclust package Open
High-dimensional data may often contain both numerical and categorical features, and in some cases features may be available as natural groups (repeated measurements, categories of features, ...). Clustering this kind of data raises severa…
View article: Post-COVID-19 Syndrome Based on Disease Form and Associated Comorbidities
Post-COVID-19 Syndrome Based on Disease Form and Associated Comorbidities Open
(1) Background: SARS-CoV-2 has infected more than 97 million people worldwide and caused the death of more than 6 million. (2) Methods: Between 1 October and 31 December 2020, 764 patients diagnosed with SARS-CoV-2 infection were selected …
View article: Pesticide concentration monitoring: Investigating spatio‐temporal patterns in left censored data
Pesticide concentration monitoring: Investigating spatio‐temporal patterns in left censored data Open
Monitoring pesticide concentration is very important for public authorities given the major concerns for environmental safety and the likelihood for increased public health risks. An important aspect of this process consists in locating ab…
View article: Sparse Weighted K-Means for Groups of Mixed-Type Variables
Sparse Weighted K-Means for Groups of Mixed-Type Variables Open
Assessing the underlying structure of a dataset is often done by training a clustering procedure on the features describing the data. In practice, while the data may be described by a large number of features, only a minority of them may b…
View article: Challenges in anomaly and change point detection
Challenges in anomaly and change point detection Open
This paper presents an introduction to the state-of-the-art in anomaly and change-point detection. On the one hand, the main concepts needed to understand the vast scientific literature on those subjects are introduced. On the other, a sel…
View article: Automatic Detection of Rare Observations During Production Tests Using Statistical Models
Automatic Detection of Rare Observations During Production Tests Using Statistical Models Open
Engines are verified through production tests before delivering them to customers. During those tests, lot of measures are taken on different parts of the engine, considering multiple physical parameters. Unexpected measures can be observe…
View article: Handling Correlations in Random Forests: which Impacts on Variable Importance and Model Interpretability?
Handling Correlations in Random Forests: which Impacts on Variable Importance and Model Interpretability? Open
The present manuscript tackles the issues of model interpretability and variable importance in random forests, in the presence of correlated input variables. Variable importance criteria based on random permutations are known to be sensiti…
View article: Kernel and dissimilarity methods for exploratory analysis in a social context
Kernel and dissimilarity methods for exploratory analysis in a social context Open
International audience
View article: Automatic detection of rare observations during production tests using statistical models
Automatic detection of rare observations during production tests using statistical models Open
Engines are verified through production tests before delivering them to customers. During those tests, lot of measures are taken on different parts of the engine, considering multiple physical parameters. Unexpected measures can be observe…
View article: Impact of Intermediate Hyperglycemia and Diabetes on Immune Dysfunction in Tuberculosis
Impact of Intermediate Hyperglycemia and Diabetes on Immune Dysfunction in Tuberculosis Open
Background People with diabetes have an increased risk of developing active tuberculosis (TB) and are more likely to have poor TB-treatment outcomes, which may impact on control of TB as the prevalence of diabetes is increasing worldwide. …
View article: Nasal Microbiology from Patients with Chronic Rhinosinusitis
Nasal Microbiology from Patients with Chronic Rhinosinusitis Open
The purpose of this study is to establish if the germs that were identified in the bacteriological examination of nasal secretions of patients with CRS without nasal polyposis and patients with CRS with nasal polyposis are different. Study…
View article: Gingival Recession in a Case of Anterior Crossbite with Angle Class I Relationship.
Gingival Recession in a Case of Anterior Crossbite with Angle Class I Relationship. Open
Anterior crossbite is one of the most common orthodontic problems encountered during the dental eruption. Usually, the anomaly becomes evident during mixed dentition, as a result of the disharmony between the dental, skeletal and functiona…
View article: Reply to Stepinski and Dmowska: Segregation beyond scale and across space: Arbitrary versus objective analysis
Reply to Stepinski and Dmowska: Segregation beyond scale and across space: Arbitrary versus objective analysis Open
International audience
View article: Automatic Indexation of Turbofan Data to Identify Anomalous Behaviors
Automatic Indexation of Turbofan Data to Identify Anomalous Behaviors Open
Flight data are now flowing in our databases. The fact is that we cannot analyze every single observation and we need a tool to automatically alert in case of unusual behavior and another tool to find similarities between parts of real air…
View article: Pulmonary tuberculosis with atypical presentation because of unknown previous HIV infection – case report
Pulmonary tuberculosis with atypical presentation because of unknown previous HIV infection – case report Open
Background People coinfected with tuberculosis (TB) and human immunodeficiency virus (HIV) are 20–37 times more likely to develop active TB disease than non-HIV-infected people. Syndemic interaction between HIV and TB epidemics has made te…
View article: Segregation through the multiscalar lens
Segregation through the multiscalar lens Open
Significance We develop a method of measuring segregation which captures the multidimensional nature of mixing in metropolitan areas. The use of trajectory convergence analysis provides a flexible way for capturing change across all scales…
View article: How to Sample the Unreachable: Transbronchial Biopsy
How to Sample the Unreachable: Transbronchial Biopsy Open
Transbronchial biopsy (TBBx) or bronchoscopic lung biopsy (BLBx) should be a diagnosis tool for focal peripheral lesions and for diffuse lung disease in every bronchoscopic suite around the world. The main advantage of this procedure is th…
View article: Therapy Side Effects in Systemic Lupus Erythematosus.
Therapy Side Effects in Systemic Lupus Erythematosus. Open
Glucosteroids (GS) are widely used drugs for various inflammatory pathologies (Nephrotic syndrome, Proliferative glomerulonephritis, Extramembrane glomerulonephritis, Nephropathy of the Nodous Poliarterita (PAN), Nephropathy from purple He…
View article: Self-Organizing Maps, theory and applications
Self-Organizing Maps, theory and applications Open
El algoritmo de auto-organizacion (Self-Organizing Map, SOM), o Mapa de Kohonen, es un algoritmo muy
popular, definido por Teuvo Kohonen al principio de los anos 80. El actua como un algoritmo de clasificacion
(clustering) no supervisado…
View article: From Urban Segregation to Spatial Pattern Detection
From Urban Segregation to Spatial Pattern Detection Open
We develop a "multifocal" approach to reveal spatial dissimilarities in cities, from the most local scale to the metropolitan one. Think for instance of a statistical variable that may be measured at different scales, eg ethnic group propo…