Results 21 to 30 of about 23,045 (305)

Clinical utility of combined assessments of 4D volumetric perfusion CT, diffusion-weighted MRI and 18F-FDG PET-CT for the prediction of outcomes of head and neck squamous cell carcinoma treated with chemoradiotherapy

open access: yesRadiation Oncology, 2023
Background Multiparametric imaging has been seen as a route to improved prediction of chemoradiotherapy treatment outcomes. Four-dimensional volumetric perfusion CT (4D PCT) is useful for whole-organ perfusion measurement, as it reflects the ...
Hirokazu Tsuchiya   +6 more
doaj   +1 more source

The multivariate asymmetric slash Laplace distribution and its applications

open access: yesStatistica, 2013
We have introduced a multivariate asymmetric-slash Laplace distribution, a flexible distribution that can take skewness and heavy tails into account. This distribution is useful in simulation studies where it can introduce distributional challenges in ...
Bindu Punathumparambath
doaj   +1 more source

On the Canonical Form of Scale Mixtures of Skew-Normal Distributions

open access: yesStatistica, 2020
The canonical form of scale mixtures of multivariate skew-normal distribution is defined, emphasizing its role in summarizing some key properties of this class of distributions.
Antonella Capitanio
doaj   +1 more source

Uncertainty in Economic Policies and Stock Price Crash Risk Companies Listed in Tehran Stock Exchange [PDF]

open access: yesInternational Journal of Business and Development Studies, 2022
The purpose of this study was to examine the effect of uncertainty in economic policy on the stock price crash risk. In this applied descriptive-analytical ex post facto study, the statistical population included the companies listed on the Tehran Stock ...
Leila Zamani   +2 more
doaj   +1 more source

Sub-dimensional Mardia measures of multivariate skewness and kurtosis

open access: yes, 2022
The Mardia measures of multivariate skewness and kurtosis summarize the respective characteristics of a multivariate distribution with two numbers. However, these measures do not reflect the sub-dimensional features of the distribution.
Chowdhury, Joydeep   +3 more
core   +3 more sources

Application of Aeolian Sediments Granulometry Characteristics to Determine the Morphology of Homogenous Sand Dunes through Multivariate Data Analysis (Case Study: Kashan Erg) [PDF]

open access: yesمدیریت بیابان, 2013
Kashan Erg is one of the most important sand seacomplexes in Iran. The Current research tried to determine the homogeneity of Kashan Erg through multivariate data analysis.
Asghar Tavakkoli Fard   +3 more
doaj   +1 more source

The Effect of External Corporate Governance Mechanism on the Stock Price Crash Risk with Emphasis on Financial Reporting Quality and Auditor Expertise in the Industry [PDF]

open access: yesبررسی‌های حسابداری و حسابرسی, 2021
Objective: The main purpose of this study is to examine the effect of external corporate governance mechanism on stock price crash risk in firms listed on the Tehran Stock Exchange, with emphasis on financial reporting quality and auditor industry ...
Mahnaz Eslamdoost   +2 more
doaj   +1 more source

Multivariate skew-symmetric distributions

open access: yesApplied Mathematics Letters, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Arjun K. Gupta, Fu-Chuen Chang
openaire   +2 more sources

Texture Analysis of Sequential Images of T2-weighted Imaging and Diffusion-weighted Imaging for Predicting the Efficacy of Chemoradiotherapy in Cervical Squamous Cell Carcinoma

open access: yesXiehe Yixue Zazhi, 2021
Objective  To investigate the correlation of the texture parameters of T2-weighted imaging (T2WI) and diffusion-weighted imaging (DWI) with the efficacy of chemoradiotherapy in cervical squamous cell carcinoma.
SU Baiyan   +5 more
doaj   +1 more source

A multivariate skew normal distribution

open access: yesJournal of Multivariate Analysis, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Gupta, Arjun K.   +2 more
openaire   +1 more source

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