Results 71 to 80 of about 1,172,135 (282)

Nonnegative Rank vs. Binary Rank

open access: yes, 2016
Motivated by (and using tools from) communication complexity, we investigate the relationship between the following two ranks of a $0$-$1$ matrix: its nonnegative rank and its binary rank (the $\log$ of the latter being the unambiguous nondeterministic communication complexity).
openaire   +2 more sources

Ranked Fragmentations [PDF]

open access: yesESAIM: Probability and Statistics, 2002
31 ...
openaire   +4 more sources

Prolonged Corrected QT Interval as an Early Electrocardiographic Marker of Cyclophosphamide‐Induced Cardiotoxicity in Pediatric Hematology and Oncology Patients

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Cyclophosphamide (CY) is associated with potentially fatal cardiotoxicity, yet no electrocardiographic indices have been established for early detection of CY‐induced cardiomyopathy. This study aimed to determine whether corrected QT interval (QTc) prolongation can predict early onset of CY‐related cardiac dysfunction in pediatric ...
Junpei Kawamura   +5 more
wiley   +1 more source

Dual Transformation of Auxiliary Variables by Using Outliers in Stratified Random Sampling

open access: yesMathematics
To estimate the finite population variance of the study variable, this paper proposes an improved class of efficient estimators using different transformations. When both the minimum and maximum values of the auxiliary variable are known and the ranks of
Mohammed Ahmed Alomair, Umer Daraz
doaj   +1 more source

Predicting Chronicity in Children and Adolescents With Newly Diagnosed Immune Thrombocytopenia at the Timepoint of Diagnosis Using Machine Learning‐Based Approaches

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Objectives To identify predictors of chronic ITP (cITP) and to develop a model based on several machine learning (ML) methods to estimate the individual risk of chronicity at the timepoint of diagnosis. Methods We analyzed a longitudinal cohort of 944 children enrolled in the Intercontinental Cooperative immune thrombocytopenia (ITP) Study ...
Severin Kasser   +6 more
wiley   +1 more source

A Systematic Review of Evidence on the Clinical Effectiveness of Surveillance Imaging in Children With Medulloblastoma and Ependymoma

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Surveillance imaging aims to detect tumour relapse before symptoms develop, but it's unclear whether earlier detection of relapse leads to better outcomes in children and young people (CYP) with medulloblastoma and ependymoma. This systematic review aims to identify relevant literature to determine the efficacy of surveillance magnetic ...
Lucy Shepherd   +3 more
wiley   +1 more source

Transparência: a hierarquização dos países decorrente da opção democrática no índice da Freedom House

open access: yesInterseções, 2019
O Ocidente tem propagado a ideia de que regime político democrático é a melhor ou até mesmo a única alternativa para a sociedade internacional (FUKUYAMA, 1989). Concomitantemente à valorização da democracia na atualidade, diversas instituições se propõem
Vítor César Silva Xavier
doaj   +1 more source

Rational toral ranks in certain algebras

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2004
We calculate the rational toral ranks of two spaces whose cohomologies are isomorphic and note that rational toral rank is a rational homotopy invariant but not a cohomology invariant.
Yasusuke Kotani, Toshihiro Yamaguchi
doaj   +1 more source

Bayesian inference for bivariate ranks

open access: yes, 2018
A recommender system based on ranks is proposed, where an expert's ranking of a set of objects and a user's ranking of a subset of those objects are combined to make a prediction of the user's ranking of all objects.
Guillotte, Simon   +2 more
core  

Spectral morphisms, K-theory, and stable ranks [PDF]

open access: yes, 2009
We give a brief account of the interplay between spectral morphisms, K-theory, and stable ranks in the context of Banach algebras.Comment: 12 pages; to appear in the Proceedings of the Workshop on Noncommutative Geometry (Fields Institute, Toronto ...
Nica, Bogdan
core   +1 more source

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