Results 71 to 80 of about 1,022,045 (334)

Moments of minors of Wishart matrices

, 2008
For a random matrix following a Wishart distribution, we derive formulas for the expectation and the covariance matrix of compound matrices. The compound matrix of order $m$ is populated by all $m\times m$-minors of the Wishart matrix.
Drton, Mathias, Massam, Hélène, Olkin, Ingram   +2 more
core   +2 more sources

CSF Biomarker‐Based Cognitive Trajectories in Parkinson's Disease‐Subjective Cognitive Decline

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Cognitive complaints without objective cognitive impairment in Parkinson's Disease, termed Parkinson's Disease‐Subjective Cognitive Decline (PD‐SCD), have been associated with cognitive decline. However, its progression is heterogeneous, highlighting the need for improved identification of patients at greater risk for deterioration ...
Jon Rodriguez‐Antiguedad, Arnau Puig‐Davi, Iñigo Ruíz‐Barrio, Javier Pagonabarraga, Anna Vázquez‐Oliver, Andrea Horta‐Barba, Jaime Kulisevsky, Saül Martínez‐Horta   +7 more
wiley   +1 more source

On the limiting distributions of multivariate depth-based rank sum statistics and related tests

, 2007
A depth-based rank sum statistic for multivariate data introduced by Liu and Singh [J. Amer. Statist. Assoc. 88 (1993) 252--260] as an extension of the Wilcoxon rank sum statistic for univariate data has been used in multivariate rank tests in quality ...
He, Xuming, Zuo, Yijun
core   +1 more source

Military Service Roles and ALS Among Veterans: A Matched Case–Control Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT While military service is an established risk factor for amyotrophic lateral sclerosis (ALS), it remains unclear whether this association is linked to combat. We conducted a matched case–control study comparing 191 ALS patients who were veterans of the Israeli Defense Forces (IDF) with known military service type and 1910 matched controls. The
Asaf Honig, Roy Dayan, Amir Knaani, Hagai Levine, Marc Gotkine   +4 more
wiley   +1 more source

Hydrogeochemistry of Groundwater from Kazaure Area, NW Nigeria using Multivariate Statistics [PDF]

E3S Web of Conferences, 2019
This study was aimed at understanding the factors affecting groundwater for the benefit of water resources management. Groundwater collected from 18 sites over an area of 770 Km2 was analysed.
Ado Musa, Adeyeye Oluwafemi, Xiao Changlai, Liang Xuijuan   +3 more
doaj   +1 more source

Factors for Rituximab Refractoriness in AQP4‐IgG+ NMOSD: A Cohort Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Neuromyelitis optica spectrum disorder (NMOSD) is a severe autoimmune condition of the central nervous system (CNS), often associated with aquaporin‐4 antibodies (AQP4‐IgG). Rituximab, a CD20+ B‐cell depleting monoclonal antibody, is widely used as first‐line therapy.
Mariano Marrodan, María A. Piedrabuena, María A. Zarate, Sofía Rodríguez Murúa, Ezequiel I. Surace, Mauricio F. Farez, Marcela P. Fiol, María C. Ysrraelit, Jorge Correale   +8 more
wiley   +1 more source

Relevance of Kappa and Lambda Free Light Chains in Autoimmune Astrocytopathy Associated With Anti‐GFAP Antibodies

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction The kappa‐free light chain (κ‐FLC) index is known to be highly sensitive and specific for diagnosing multiple sclerosis (MS), while little is understood about lambda (λ)‐FLC. This study assessed the κ‐FLC and λ‐FLC indices in autoimmune glial fibrillary acidic protein (GFAP) astrocytopathy.
Michael Levraut, Romain Marignier, Mikael Cohen, Jeanne Benoit, Cassandre Landes‐Chateau, Elisabeth Maillart, Marion Cremoni, Barbara Seitz‐Polski, Anne‐Laurie Pinto, Pauline Dumez, Jérôme Honnorat, Christine Lebrun‐Frenay   +11 more
wiley   +1 more source

Directions and projective shapes

, 2005
This paper deals with projective shape analysis, which is a study of finite configurations of points modulo projective transformations. The topic has various applications in machine vision.
Mardia, Kanti V., Patrangenaru, Vic
core   +1 more source

Approximations for multivariate U-statistics

Journal of Multivariate Analysis, 1987
AbstractEdgeworth approximations for multivariate U-statistics hold up to the order o(n−12) under moment conditions and the assumption that the projection of the U-statistic to sums of i.i.d. random vectors is strongly nonlattice.
openaire   +3 more sources

Fixel‐Based Analysis of Diffusion Imaging as a Quantitative Marker of Disease State in Spinocerebellar Ataxia

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Spinocerebellar ataxias (SCAs) are a group of genetically heterogeneous neurodegenerative diseases causing progressive deterioration and reduced quality of life. Therapeutic advances have been limited by a lack of sensitive anatomic, functional, or diffusion imaging‐based biomarkers.
David J. Arpin, S. H. Subramony, the READISCA Consortium, David E. Vaillancourt, Tetsuo Ashizawa, Alexandra Durr, Thomas Mareci, Thomas Klockgether, Jennifer Faber, Henry L. Paulson, Gülin Öz, Matthew R. Burns   +11 more
wiley   +1 more source