Results 21 to 30 of about 3,864,284 (197)

A New Study for Dynamical Characteristics of Double-variable-edge and Variable Thickness Plates Made of Open-cell Porous Metal

open access: yes, 2023
This article explores the dynamic characteristics of a specific plate known as 'double-variable-edge' (DVE) plate with varying thickness, constructed from functionally graded porous material. The edge profiles of the plate and its thickness variation are
Dzung, Nguyen Manh   +6 more
core   +1 more source

Natural convection of Al2O3-water nanofluid with variable properties in a square enclosure with heat source and heat sink on the vertical walls [PDF]

open access: yesمجله مدل سازی در مهندسی, 2017
The buoyancy-driven fluid flow and heat transfer in a square cavity with partially active side walls filled The buoyancy-driven fluid flow and heat transfer in a square cavity with partially active side walls filled which the length is equal to half of ...
G.A. Sheikhzadeh   +3 more
doaj   +1 more source

A study of the impacts of variable factors on built environment graduates’ prospects [PDF]

open access: yes, 2016
This paper investigates the impacts of variable factors, such as practical experience and factors related to study style, on employment outcomes and patterns of built environment graduates in Australia.
Poon, J   +3 more
core   +1 more source

Neutrosophic Ranked Set Sampling Scheme for Estimating Population Mean: An Application to Demographic Data [PDF]

open access: yesNeutrosophic Sets and Systems
The primary goal of this study is to address the limitations of classical statistics in handling ambiguous or indeterminate data. The best alternative to classical and fuzzy statistics for handling such data uncertainty is neutrosophic statistics, which ...
Rajesh Singh , Anamika Kumari
doaj   +1 more source

Occupational stress and burnout among intensive care unit nurses during the pandemic: A prospective longitudinal study of nurses in COVID and non-COVID units

open access: yesFrontiers in Psychiatry, 2023
BackgroundIntensive care unit (ICU) nurses are highly prone to occupational stress and burnout, affecting their physical and mental health. The occurrence of the pandemic and related events increased nurses’ workload and further exacerbated their stress ...
Pratima Saravanan   +5 more
doaj   +1 more source

Optimal Neutrosophic Difference to Log-Type Estimator for Population Mean: Some Numerical and Simulation Studieshttps://fs.unm.edu/NSS/11NeutrosophicDifference.pdf [PDF]

open access: yesNeutrosophic Sets and Systems
Indeterminacy in the data are commonly observed in various fields like biomedicine, finance, marketing and other sphere of sciences, where classical statistical methods is a challenging task to deal such type of data.
SM Afsar Basha, Mahamood Usman
doaj   +1 more source

Variable selection with Random Forests for missing data [PDF]

open access: yes, 2013
Variable selection has been suggested for Random Forests to improve their efficiency of data prediction and interpretation. However, its basic element, i.e.
Hapfelmeier, Alexander, Ulm, Kurt
core   +1 more source

A family of estimators for variance estimation

open access: yesResearch in Statistics
The potential of this study for estimating the finite population variance of the study variable of a class of estimators by utilizing an auxiliary variable in simple random sampling is enormous.
Housila P. Singh   +3 more
doaj   +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

Time variability studies with ROSAT [PDF]

open access: yesInternational Astronomical Union Colloquium, 1995
AbstractAn overview over the mission of the X-ray astronomy satellite ROSAT (Röntgensatellit) is given with an emphasis on the first soft X-ray all-sky survey carried out with an imaging telescope. Several examples of time variability studies made possible by the all-sky survey are shown for active late-type stars. Two exceptional long-duration stellar
openaire   +1 more source

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