Results 131 to 140 of about 1,069,372 (310)

Latent Variables in Panel Data Models: Theoretical Contributions and Empirical Applications

open access: yes, 2009
This book addresses statistical issues related to linear panel data models with the joint occurrence of unobserved heterogeneity and measurement errors- in-variables.
PATACCHINI, Eleonora
core  

Models as a Tool for Theory Construction: Some Strategies of Preliminary Physics [PDF]

open access: yes, 2005
Theoretical models are an important tool for many aspects of scientific activity. They are used, i.a., to structure data, to apply theories or even to construct new theories. But what exactly is a model? It turns out that there is no proper definition of
Hartmann, Stephan
core  

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

open access: yesAdvanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt   +8 more
wiley   +1 more source

Quantum Field Theory and Decoherence in the Early Universe

open access: yes, 2011
Quantum field theory is indispensable for understanding many aspects of cosmology, both in the early Universe and today. For example, quantum processes could be paramount to understand the nature of the mysterious dark energy resulting in the Universe’s ...
Sub Algemeen Theoretical Physics   +2 more
core  

Improved Holographic QCD and the Quark-gluon Plasma

open access: yes, 2016
We review construction of the improved holographic models for QCD-like confining gauge theories and their applications to the physics of the quark–gluon plasma. We also review recent progress in this area of research.
Sub String Theory Cosmology and ElemPart   +2 more
core   +1 more source

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

open access: yesAdvanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi   +3 more
wiley   +1 more source

Planar Solid‐State Nanopores Toward Scalable Nanofluidic Integration Based on CMOS Technology

open access: yesAdvanced Engineering Materials, EarlyView.
We present a scalable silicon‐based fabrication strategy for planar solid‐state nanopores to enable their integration with complex nanofluidic systems. Prototype devices demonstrate normal voltage‐current characteristics, good noise performance, and appreciable streaming currents. Our CMOS‐compatible fabrication process offers precise geometric control
Ngan Hoang Pham   +7 more
wiley   +1 more source

Electrochemical Evaluation of Compressed Selective Laser Melted AlSi7Mg and AlSi10Mg Alloys in Chloride Environment

open access: yesAdvanced Engineering Materials, EarlyView.
The corrosion performance of AlSi7Mg and AlSi10Mg alloys produced through selective laser melting (SLM) was examined under compressive stress in a chloride environment. Electrochemical analyses, including open‐circuit potential (OCP), potentiodynamic polarization (CPP), and electrochemical impedance spectroscopy (EIS), were complemented by scanning ...
Femi John Akinfolarin   +2 more
wiley   +1 more source

Computational and Theoretical Methods for Mass-Transport Analysis in 3D-Printed Milli Fluidic Electrochemical Devices with Channel Band Electrodes

open access: yesChemosensors
Available models for mass transport in microfluidic electrochemical sensors fall short in capturing critical features of millimeter-scale devices 3D-printed using fused deposition modeling, including inherent porosity and non-flat electrode geometries ...
Jesús E. Contreras-Naranjo   +3 more
doaj   +1 more source

Theoretical models of voting behaviour [PDF]

open access: yes, 2010
This article reviews the main theoretical models that explain the electoral behavior — sociological model of voting behavior, psychosocial model of voting behavior and rational choice theory —, stressing the continuity and theoretical complementarity ...
da Silva Antunes, Rui Jorge
core  

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