Results 41 to 50 of about 711,538 (202)
Numerical Solution of the Spinless Salpeter Equation by a Semianalytical Matrix Method (a Mathematica 4.0 routine) [PDF]
, 2000 In quantum theory, the so-called "spinless Salpeter equation," the relativistic generalization of the nonrelativistic Schroedinger equation, is used to describe both bound states of scalar particles and the spin-averaged spectra of bound states of ...
Lucha, Wolfgang, Schoberl, F. F.
core +3 more sources
Scientists in power plays: How substantive were scientists' narratives during the COVID‐19 pandemic?
Policy Studies Journal, EarlyView.Abstract Scientists who provide expert advice must engage with policy processes. Little is known about whether and how scientists deal with the political dynamics of policy processes that are inherent to policymaking. We study this question by building on the policy dimension concept within the Narrative Policy Framework.
Jule Ksinsik, Caroline Schlaufer
wiley +1 more source
Klein-Gordon lower bound to the semirelativistic ground-state energy
, 2010 For the class of attractive potentials V(r)
Greiner +16 more
core +1 more source
Exact Solutions of Bethe-Salpeter Equations with Instantaneous Interactions [PDF]
, 2013 The Bethe-Salpeter approach allows for quantum-field-theoretic descriptions of relativistic bound states; its inherent complexity, however, usually prevents to find its exact solutions.
Lucha, Wolfgang, Schoberl, Franz F.
core +1 more source
When survival becomes politics: Necessity activism and identity work under precarity
Political Psychology, Volume 47, Issue 2, April 2026.Abstract Collective action is essential for tackling social, institutional, and environmental challenges, often fueled by shared identities, common norms, and a belief in the possibility of change. However, the impact of participating in collective action on individual identities, and how this knowledge can shape future efforts to maintain engagement ...
Lucia Garcia‐Lorenzo +2 more
wiley +1 more source
Leptoconops bequaerti (Kieffer): un nuevo informe en la provincia de Santiago de Cuba
Medisan, 2014 Se realizó una investigación en la localidad de Sevilla, ubicada en el municipio costero de Guamá, en Santiago de Cuba, para identificar las especies de insectos causantes de molestias en esta población, así como sus principales fuentes de cría y los ...
Rosa María Castillo Quesada +4 more
doaj
Aspectos citológicos de la infección por papiloma virus humano
Revista Colombiana de Obstetricia y Ginecología, 1987 Se analizan los extendidos cervico vaginales de 43 pacientes con diagnóstico histológico de condilomacervico-vaginal, que concurrieron al Departamento de Ginecología y Citopatología de L.A.L.C.E.C. en 1986.
Teresita Audisio +3 more
doaj +1 more source
Oncología, 2022 Introducción: El cáncer en el año 2020 provoco 1,4 millones de muertes, el 47% en personas menores de 65 años de edad, la neutropenia febril en el paciente oncológico aumenta los casos de infecciones graves, incrementando la morbimortalidad cuando no se
Carlos Soliz Poveda +4 more
doaj +1 more source
, 2007 A popular three-dimensional reduction of the Bethe-Salpeter formalism for the description of bound states in quantum field theory is the Salpeter equation, derived by assuming both instantaneous interactions and free propagation of all bound-state ...
A. Weinstein +14 more
core +1 more source