Results 111 to 120 of about 3,357,696 (317)

On the universality of MOG weak field approximation at galaxy cluster scale

Physics Letters B, 2017
In its weak field limit, Scalar-tensor-vector gravity theory introduces a Yukawa-correction to the gravitational potential. Such a correction depends on the two parameters, α which accounts for the modification of the gravitational constant, and μ⁎−1 ...
Ivan De Martino, Mariafelicia De Laurentis   +1 more
doaj   +1 more source

Direct Heuristic Algorithms of Possibilistic Clustering Based on Transitive Approximation of Fuzzy Tolerance [PDF]

Informatică economică, 2013
This paper deals with the problem of a heuristic approach to possibilistic clustering. The approach is based on the concept of allotment among fuzzy clusters. The paper provides the description of basic concepts of the heuristic approach to possibilistic
Dmitri A. VIATTCHENIN, Aliaksandr DAMARATSKI   +1 more
doaj   +1 more source

Method to study highly correlated nanostructures: The logarithmic-discretization embedded-cluster approximation [PDF]

, 2008
This work proposes an approach to study transport properties of highly correlated local structures. The method, dubbed the logarithmic discretization embedded cluster approximation LDECA, consists of diagonalizing a finite cluster containing the many ...
E. Anda, G. Chiappe, C. Busser, M. A. Davidovich, G. Martins, F. Heidrich-Meisner, E. Dagotto   +6 more
semanticscholar   +1 more source

Distance approximations for clustering

, 2020
Die Clusteranalyse ist ein mächtiges Werkzeug um Gruppen von Datenpunkten mit ähnlichen Eigenschaften zu identifizieren. Verschiedene Algorithmen finden diese Gruppen indem sie das k-means Optimierungsproblem lösen. Da die Lösung dieses Problems NP-schwer ist, wurden Heuristiken entwickelt um die Optimierung zu beschleunigen.
openaire   +2 more sources

Approximate distributions of clusters of extremes [PDF]

Statistics & Probability Letters, 2003
Let \(\{X_n,n \geq 1\}\) be a stationary sequence of random variables. Let \(\{u_n\}\) be a real sequence such that \(P(X_1>u_n)>0\) but \(P(X_1>u_n) \to 0\) as \(n \to \infty\). For a positive integer \(m\), define \(M_m=\max \{X_1,\ldots,X_m\}\). The author studies exceedances over the threshold \(\{u_n\}\) among the variables \(X_1,\ldots,X_{r_n}\),
openaire   +5 more sources

Modeling hepatic fibrosis in TP53 knockout iPSC‐derived human liver organoids

Molecular Oncology, EarlyView.
This study developed iPSC‐derived human liver organoids with TP53 gene knockout to model human liver fibrosis. These organoids showed elevated myofibroblast activation, early disease markers, and advanced fibrotic hallmarks. The use of profibrotic differentiation medium further amplified the fibrotic signature seen in the organoids.
Mustafa Karabicici, Soheil Akbari, Ceyda Caliskan, Canan Celiker, Ozden Oz, Leman Binokay, Gökhan Karakulah, Serif Senturk, Esra Erdal   +8 more
wiley   +1 more source

Correlated band structure of NiO, CoO and MnO by variational cluster approximation [PDF]

, 2008
Forschungszentrum Karlsruhe, Institut fu¨r Festk¨orperphysik, 76021 Karlsruhe, Germany(Dated: June 2, 2008)The variational cluster approximation proposed by Potthoff is applied to the calculation of thesingle-particle spectral function of the transition ...
R. Eder
semanticscholar   +1 more source

Finding approximate gene clusters with Gecko 3 [PDF]

Nucleic Acids Research, 2016
Gene-order-based comparison of multiple genomes provides signals for functional analysis of genes and the evolutionary process of genome organization. Gene clusters are regions of co-localized genes on genomes of different species. The rapid increase in sequenced genomes necessitates bioinformatics tools for finding gene clusters in hundreds of genomes.
Winter, Sascha, Jahn, Katharina, Wehner, Stefanie, Kuchenbecker, Leon, Marz, Manja, Stoye, Jens, Böcker, Sebastian   +6 more
openaire   +5 more sources

Aggressive prostate cancer is associated with pericyte dysfunction

Molecular Oncology, EarlyView.
Tumor‐produced TGF‐β drives pericyte dysfunction in prostate cancer. This dysfunction is characterized by downregulation of some canonical pericyte markers (i.e., DES, CSPG4, and ACTA2) while maintaining the expression of others (i.e., PDGFRB, NOTCH3, and RGS5).
Anabel Martinez‐Romero, Ane Martinez‐Larrinaga, Joaquim Grego‐Bessa, Saioa Garcia‐Longarte, Hielke van Splunder, Ianire Astobiza, Amaia Ercilla, Laura Bozal‐Basterra, Isabel Mendizabal, Pilar Villacampa, Arkaitz Carracedo, Mariona Graupera   +11 more
wiley   +1 more source

A mean field method with correlations determined by linear response

, 2013
We introduce a new mean-field approximation based on the reconciliation of maximum entropy and linear response for correlations in the cluster variation method.
Raymond, Jack, Ricci-Tersenghi, Federico
core   +1 more source