Results 21 to 30 of about 505,891 (212)

Globally Aging Cortical Spontaneous Activity Revealed by Multiple Metrics and Frequency Bands Using Resting-State Functional MRI

open access: yesFrontiers in Aging Neuroscience, 2021
Most existing aging studies using functional MRI (fMRI) are based on cross-sectional data but misinterpreted their findings (i.e., age-related differences) as longitudinal outcomes (i.e., aging-related changes).
Xiu-Xia Xing
doaj   +1 more source

Flat ontology as a philosophy for co-disciplinary research and decision-making in present times: A step towards transdisciplinarity [PDF]

open access: yesInterdisciplinary Studies in the Humanities, 2023
"Relational perspectives" have been proposed since the 1990s as an alternative approach to the philosophical foundations of social sciences, rejecting hierarchical or binary modes of thought of conventional traditions and avoiding deficiencies of ...
R. Moussavi Khorshidi   +1 more
doaj   +1 more source

Cluster analysis homogeneity statistic

open access: yes, 2018
<p>This is the first release of my code for implementing a homogeneity statistic for cluster analysis results.</p ...
R. Noah Padgett
core   +2 more sources

Trend analysis and homogeneity tests in temperature and rainfall in Nigeria [PDF]

open access: yesGeoreview
Climate change has significantly altered global weather patterns, with notable impacts in Nigeria. The main objective of this study was to examine the trends, variability, and homogeneity in temperature and rainfall in Nigeria.
Alexander Oghenerukevwe EYEFIA
doaj   +1 more source

Mediated homogenization [PDF]

open access: yesPhysical Review A, 2007
Homogenization protocols model the quantum mechanical evolution of a system to a fixed state independently from its initial configuration by repeatedly coupling it with a collection of identical ancillas. Here we analyze these protocols within the formalism of "relaxing" channels providing an easy to check sufficient condition for homogenization.
BURGARTH D, GIOVANNETTI, VITTORIO
openaire   +5 more sources

Continuous Uniform Finite Time Stabilization of Planar Controllable Systems [PDF]

open access: yes, 2015
Continuous homogeneous controllers are utilized in a full state feedback setting for the uniform finite time stabilization of a perturbed double integrator in the presence of uniformly decaying piecewise continuous disturbances.
Oza, HB   +5 more
core   +1 more source

Uji Homogenitas dengan Sebaran Khi-Kuadrat dalam Evaluasi Suatu Sistem

open access: yesComTech, 2011
This paper discusses the application of khi-square distribution in homogeneity of variance test on the control of a system used in a process considered normally spread with a mean of and a variance (degree of homogeneity) of .
Iwa Sungkawa
doaj   +1 more source

Homogeneous Permutations [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2002
There are just five Fraïssé classes of permutations (apart from the trivial class of permutations of a singleton set); these are the identity permutations, reversing permutations, composites (in either order) of these two classes, and all permutations. The paper also discusses infinite generalisations of permutations, and the connection with Fraïssé's ...
openaire   +2 more sources

Preparation of the Reference Materials for Rb-Sr and Sm-Nd Isotope Analysis

open access: yesYankuang ceshi, 2021
BACKGROUND: One Rb-Sr certified reference materials (GBW04411) and one Sm-Nd certified reference materials (GBW04419) for geological age, which are potash feldspar and basalt respectively, were produced and certified about 30 years ago.
TANG Suo-han   +4 more
doaj   +1 more source

New results on landscape boundaries [PDF]

open access: yesActa Geographica Debrecina. Landscape & Environment Series, 2011
The correct delineation of geographical and landscape ecological units, being the fundamental territorial domains of both physical and human geography, is very important from the aspect of several other related disciplines as well. It is hard to tell how
Teodóra Bata, Gábor Mezősi
doaj  

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