Results 31 to 40 of about 749,660 (377)

Small scale problems of the $\Lambda$CDM model: a short review [PDF]

open access: yes, 2016
The $\Lambda$CDM model, or concordance cosmology, as it is often called, is a paradigm at its maturity. It is clearly able to describe the universe at large scale, even if some issues remain open, such as the cosmological constant problem , the small ...
A. Popolo, M. L. Delliou
semanticscholar   +1 more source

Clinical profile of Saudi patients with multiple myeloma

open access: yesJournal of Nature and Science of Medicine, 2019
Background: Multiple myeloma (MM) is a neoplasm of plasma cells. Ethnic variations among the clinical features of MM have been reported. Objectives: This study was performed to assess the clinical features of Saudi MM patients. Patients and Methods: Data
Alanoud Abdulaziz Alhuqayl   +5 more
doaj   +1 more source

$\lambda$-CONVERGENCE AND $\lambda$-REPLACEABILITY

open access: yesTamkang Journal of Mathematics, 1995
Abstract. E. Jiirimae has introduced the notion of $\lambda$-replaceability. We shall show that this notion can be characterized in ordinary summability terms.
Beekmann, Wolfgang, Chang, Shao-Chien
openaire   +3 more sources

Analytic structure of Bloch functions for linear molecular chains [PDF]

open access: yes, 2006
This paper deals with Hamiltonians of the form $H=-{\bf \nabla}^2+v(\rr)$, with $v(\rr)$ periodic along the $z$ direction, $v(x,y,z+b)=v(x,y,z)$. The wavefunctions of $H$ are the well known Bloch functions $\psi_{n,\lambda}(\rr)$, with the fundamental ...
E. Prodan   +3 more
core   +1 more source

Evaluación de dos tipos de adsorbentes para la recuperación de vapores de hidrocarburos generados en Plantel de Recope en Ochomogo

open access: yesTecnura, 2022
Contexto: Al cargar el producto en los camiones cisterna, se generan vapores de hidrocarburos emitidos sin tratamiento al medio ambiente. Para evitar estas emisiones, se requiere un sistema que permita retener y recuperar estas sustancias, mediante el ...
Laura Vanessa Quesada Carvajal   +1 more
doaj   +1 more source

A dual graph construction for higher-rank graphs, and $K$-theory for finite 2-graphs [PDF]

open access: yes, 2004
Given a $k$-graph $\Lambda$ and an element $p$ of $\NN^k$, we define the dual $k$-graph, $p\Lambda$. We show that when $\Lambda$ is row-finite and has no sources, the $C^*$-algebras $C^*(\Lambda)$ and $C^*(p\Lambda)$ coincide.
Allen, Stephen, Pask, David, Sims, Aidan
core   +3 more sources

Lambda-nuclear interactions and hyperon puzzle in neutron stars [PDF]

open access: yes, 2016
. Brueckner theory is used to investigate the in-medium properties of a $\Lambda$Λ-hyperon in nuclear and neutron matter, based on hyperon-nucleon interactions derived within SU(3) chiral effective field theory (EFT).
J. Haidenbauer   +5 more
semanticscholar   +1 more source

Importance of Baryon-Baryon Coupling in Hypernuclei [PDF]

open access: yes, 1994
The $\Lambda N - \Sigma N$ coupling in $\Lambda$--hypernuclei and $\Lambda \Lambda - \Xi N$ coupling in $\Lambda \Lambda$--hypernuclei produce novel physics not observed in the conventional, nonstrange sector.
Afnan, I. R.   +3 more
core   +3 more sources

Lambda Theories of Effective Lambda Models [PDF]

open access: yes, 2007
A longstanding open problem is whether there exists a non-syntactical model of untyped lambda-calculus whose theory is exactly the least equational lambda-theory (=Lb). In this paper we make use of the Visser topology for investigating the more general question of whether the equational (resp. order) theory of a non syntactical model M, say Eq(M) (resp.
C. BERLINE   +2 more
openaire   +3 more sources

Impact of Roads on Environmental Protected Areas: Analysis and Comparison of Metrics for Assessing Habitat Fragmentation

open access: yesLand, 2022
The present study focuses on evaluating the effect of fragmentation caused by road infrastructures on a territory with singular characteristics such as low population density and a high proportion of its surface area protected by the Natura 2000 network.
Manuel Sánchez-Fernández   +3 more
doaj   +1 more source

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