Results 21 to 30 of about 17,511,424 (267)

Children With Tetralogy of Fallot in an Urban Centre in Africa [PDF]

Journal of Cardiovascular and Thoracic Research, 2015
Introduction: There is a dearth of literature on tetralogy of fallot (TOF) in children in Sub-Saharan Africa. This study up aims to describe the prevalence, clinical profile and associated cardiac anomaly of children diagnosed with TOF documented over an
Barakat Adeola Animasahun, Akpoembele Deborah Madise-wobo, Samuel I Omokhodion, Olisamedua Fidelis Njokanma   +3 more
doaj   +1 more source

Bayesian Predictive Densities as an Interpretation of a Class of Skew–Student t Distributions with Application to Medical Data [PDF]

, 2019
This paper describes a new Bayesian interpretation of a class of skew–Student t distributions. We consider a hierarchical normal model with unknown covariance matrix and show that by imposing different restrictions on the parameter space, corresponding Bayes predictive density estimators under Kullback-Leibler loss function embrace some well-known skew–
Abdolnasser Sadeghkhani, Syed Ejaz Ahmed
openaire   +1 more source

Parameter Estimation of a Linear ARX Model With Skewed Heavy-Tailed Noise

IEEE Access
An online variational Bayesian algorithm based on a skewed Student’s $t$ - distribution, referred to as OVB-skewt, is proposed for robust parameter estimation in linear AutoRegressive with eXogenous inputs (ARX) models. In practical applications,
Xin Chen, Jialong Zhang
doaj   +1 more source

An empirical application of a stochastic volatility model with GH skew Student's t -distribution to the volatility of Latin-American stock returns [PDF]

The Quarterly Review of Economics and Finance, 2018
Abstract Using daily stocks returns data of a set of Latin-American countries (Argentina, Brazil, Chile, Mexico and Peru) for the sample period 1996:01–2013:12, we estimate a stochastic volatility model incorporating both leverage effects and skewed heavy-tailed disturbances through of the GH Skew Student's t-distribution based on Bayesian estimation
Patricia Lengua Lafosse, Gabriel Rodríguez   +1 more
openaire   +1 more source

S2LU: An Activation Function Based on Skew Student's t-distribution for Improved Neural Network Performance

Neural Computing and Applications
Abstract Activation functions are a fundamental component of deep neural networks and enable the learning of complex data representations by introducing nonlinearity between layers. Existing activation functions such as ReLU, ELU, Swish and Mish have achieved successful results on various tasks. However, ReLU leads to the “dead neuron”
Özcan Küçükalİ, M. Hakan Bozkurt, Esma Ulutaş, Işılay Bozkurt   +3 more
openaire   +2 more sources

Therapeutic Apheresis in Nigeria: A Multi‐Center Summary of Abstracts From the Inaugural Nigerian Society for Apheresis Scientific Meeting

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Therapeutic apheresis (TA) is an established treatment modality for hematologic, neurologic, and immunologic disorders, yet access remains severely limited in sub‐Saharan Africa. Donor apheresis, including platelet apheresis collection from healthy donors, represents an important complementary modality supporting blood product ...
Nosa Bazuaye, Chimezie Okwuonu, Evelyn Idam, Folasade Adelekan‐Popoola, Shakirat Gold‐Olufadi, Olufunto Olufela Kalejaiye, Abdullateef Ogala, Zinnah Aloziem, Blossom Amamchukwu, Patience Elimia, Mkpoikanabasi Obot‐Obot, Henry Mbakwe, Praises Maduagwuna, Olatunji Akinrodoye, Chiamaka Anyanwu, Benjamin Anyanwu, Adedamola Akinsiku, Oluwatoyin A. Akinsiku, Muzamil O. Hassan, Fatiu A. Arogundade, Olalekan E. Ojo, Homayemem Weli, Jesupelumi Adenihun, Aderemi Adelaja, Ebun Bamgboye, Olalekan Olatise, Ade E. Faponle, Ayoola Odeyemi, Michael Muoka, Stephen Asaolu, Qudrat Busari, Blessing Dawudu, Michael Naiyeju, Rasheed A. Balogun   +33 more
wiley   +1 more source

Renyi Entropy Derivation for a Modified Skewed Student-t Distribution

Mikailalsys Journal of Mathematics and Statistics
This paper derives the Renyi entropy for a modified Skew Student-t distribution (SStD). The skew Student-t distribution was modified using DUS transformation technique. The final expression of the Renyi entropy was derived using the probability density function of the transformed (SStD).
E. N. Okeke, I. J. David, M. B. W. Nkombou   +2 more
openaire   +1 more source

The human gut microbiome across the life course

FEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero, Basak Bahcivanci, Antonietta Hayhoe, Animesh Acharjee, Ezgi Özkurt   +4 more
wiley   +1 more source

Bayesian analysis of stochastic volatility-in-mean model with leverage and asymmetrically heavy-tailed error using generalized hyperbolic skew Student’s t-distribution [PDF]

Statistics and Its Interface, 2017
A stochastic volatility-in-mean model with correlated errors using the generalized hyperbolic skew Student-t (GHST) distribution provides a robust alternative to the parameter estimation for daily stock returns in the absence of normality. An efficient Markov chain Monte Carlo (MCMC) sampling algorithm is developed for parameter estimation.
William L, Leão, Carlos A, Abanto-Valle, Ming-Hui, Chen   +2 more
openaire   +2 more sources

Design and analysis strategies for robust microbiome ageing research

FEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik, İsmail Güderer, Yi Wang, Tayyaba Alvi, Prasoon Pandey, Handan Melike Dönertaş   +5 more
wiley   +1 more source