Se ha sostenido que la dicotomía izquierda-derecha habría perdido relevancia;
con la crisis del socialismo democrático y la caída del comunismo. La presente;
investigación busca aportar a ese debate. ...El objetivo de la investigación es;
determinar si sigue siendo útil el uso de la dicotomía izquierda-derecha y si la;
lucha político-ideológica actual se entiende mejor a través de la misma. A partir;
de los electores, las élites políticas o las élites académicas, en este estudio;
creemos demostrar que en Europa occidental y en EE. UU está plenamente;
vigente, que la vigencia está asociada a la distinción entre igualitarismo y no;
igualitarismo, distinción que tiene tanto una dimensión cultural como económica,;
no debiendo reducirse está última a un mayor o menor apoyo al intervencionismo;
estatal en la economía; y que la dicotomía izquierda-derecha tiene mayor;
relevancia que la dicotomía libertad-autoridad (o liberal-populista). En contraste,;
en Europa oriental la dicotomía tiene poca relevancia, y en América Latina, si;
bien sigue vigente, esta vigencia tiene un alcance geográfico y profundidad;
limitados.
Phys. Rev. D 98, 043017 (2018) Dwarf spheroidal galaxies are among the most promising targets for indirect
dark matter (DM) searches in $\gamma$-rays. The $\gamma$-ray flux from DM
annihilation in a ...dwarf spheroidal galaxy is proportional to the $J$-factor of
the source. The $J$-factor of a dwarf spheroidal galaxy is the line-of-sight
integral of the DM mass density squared times $\langle \sigma_{\rm ann} v_{\rm
rel} \rangle/(\sigma_{\rm ann} v_{\rm rel})_0$, where $\sigma_{\rm ann} v_{\rm
rel}$ is the DM annihilation cross-section times relative velocity $v_{\rm
rel}=|{\bf v}_{\rm rel}|$, angle brackets denote average over ${\bf v}_{\rm
rel}$, and $(\sigma_{\rm ann} v_{\rm rel})_0$ is the $v_{\rm rel}$-independent
part of $\sigma_{\rm ann} v_{\rm rel}$. If $\sigma_{\rm ann} v_{\rm rel}$ is
constant in $v_{\rm rel}$, $J$-factors only depend on the DM space distribution
in the source. However, if $\sigma_{\rm ann} v_{\rm rel}$ varies with $v_{\rm
rel}$, as in the presence of DM self-interactions, $J$-factors also depend on
the DM velocity distribution, and on the strength and range of the DM
self-interaction. Models for self-interacting DM are increasingly important in
the study of the small scale clustering of DM, and are compatible with current
cosmological observations. Here we derive the $J$-factor of 20 dwarf spheroidal
galaxies from stellar kinematic data under the assumption of Yukawa DM
self-interactions. $J$-factors are derived through a profile Likelihood
approach, assuming either NFW or cored DM profiles. We also compare our results
with $J$-factors derived assuming the same velocity for all DM particles in the
target galaxy. We find that this common approximation overestimates the
$J$-factors by up to one order of magnitude. $J$-factors for a sample of DM
particle masses, self-interaction coupling constants and density profiles are
provided electronically, ready to be used in other projects.
Dwarf spheroidal galaxies are among the most promising targets for indirect dark matter (DM) searches in \(\gamma\)-rays. The \(\gamma\)-ray flux from DM annihilation in a dwarf spheroidal galaxy is ...proportional to the \(J\)-factor of the source. The \(J\)-factor of a dwarf spheroidal galaxy is the line-of-sight integral of the DM mass density squared times \(\langle \sigma_{\rm ann} v_{\rm rel} \rangle/(\sigma_{\rm ann} v_{\rm rel})_0\), where \(\sigma_{\rm ann} v_{\rm rel}\) is the DM annihilation cross-section times relative velocity \(v_{\rm rel}=|{\bf v}_{\rm rel}|\), angle brackets denote average over \({\bf v}_{\rm rel}\), and \((\sigma_{\rm ann} v_{\rm rel})_0\) is the \(v_{\rm rel}\)-independent part of \(\sigma_{\rm ann} v_{\rm rel}\). If \(\sigma_{\rm ann} v_{\rm rel}\) is constant in \(v_{\rm rel}\), \(J\)-factors only depend on the DM space distribution in the source. However, if \(\sigma_{\rm ann} v_{\rm rel}\) varies with \(v_{\rm rel}\), as in the presence of DM self-interactions, \(J\)-factors also depend on the DM velocity distribution, and on the strength and range of the DM self-interaction. Models for self-interacting DM are increasingly important in the study of the small scale clustering of DM, and are compatible with current cosmological observations. Here we derive the \(J\)-factor of 20 dwarf spheroidal galaxies from stellar kinematic data under the assumption of Yukawa DM self-interactions. \(J\)-factors are derived through a profile Likelihood approach, assuming either NFW or cored DM profiles. We also compare our results with \(J\)-factors derived assuming the same velocity for all DM particles in the target galaxy. We find that this common approximation overestimates the \(J\)-factors by up to one order of magnitude. \(J\)-factors for a sample of DM particle masses, self-interaction coupling constants and density profiles are provided electronically, ready to be used in other projects.
Environmental education must be concerned with the impoverished people of the Third World. The problem resides in the self-serving interests of economic, industrial, military, and technological ...structures, and a need exists for a radical re-thinking of the relationship of man to nature. Comments on negative and positive aspects of the United Nations Environmental Programme. (KC)
Educational development in Peru is discussed as part of a series surveying UNESCO's involvement in educational cooperation with developing nations. There are seven chapters to the report, which is ...written in Spanish. The first chapter describes Peru's national education policy, and discusses how it relates to the country's plan for national development and to the policy for international cooperation in education. Chapters two and three contain detailed descriptions of international projects undertaken between 1968 and 1979. Chapter four describes the national plan for educational development in 1977-1978. A description and analysis of international cooperation at the university level is contained in chapter five. Chapter six discusses the educational priorities of the country. Included among the priorities are: expansion of their basic education program (involving children from the ages of six to 15 years), with emphasis on correcting regional inequalities; the introduction of educational components into rural education projects; and the strengthening and consolidation of already existing scholarly institutions so that they can better train youth for employment. The last chapter summarizes the report. (Author/RM)
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