Results 51 to 60 of about 112,031 (238)

The Mechanics of Regime Instability in Latin America Mecanismos de inestabilidad de régimen en América Latina

Journal of Politics in Latin America, 2009
The paper is narrowly addressed to a single puzzle: How did it happen that countries that attempted to install democracy earlier enjoyed it less frequently?
Adam Przeworski
doaj  

Meson loops in the f0(980) and a0(980) radiative decays into ρ , ω [PDF]

The European Physical Journal A, 2008
We calculate the radiative decay widths of the $a_0(980)$ and $f_0(980)$ scalar mesons into $ργ$ and $ωγ$ considering the dynamically generated nature of these scalar resonances within the realm of the Chiral Unitary Approach. The main ingredient in the evaluation of the radiative width of the scalar mesons are the loops coming from the decay into ...
Nagahiro, Hideko, Roca Zamora, Luis, Oset Báguena, Eulogio   +2 more
openaire   +3 more sources

Engineering Concentration‐Dependent Intravitreal Mobility via Cyclic Arginine‐Enriched Nanocarrier Surface Modification: In Vivo Proof‐of‐Concept in a Porcine Large Animal Model

Advanced Healthcare Materials, EarlyView.
In this study, Hammer et al. highlight cyclic‐arginine surface engineering as a highly biocompatible, controllable, and concentration‐dependent regulator of intravitreal nanoparticle mobility in vivo in a translational large animal model. The cyclic arginine surface‐modification supports the development of next‐generation biomaterials for long‐acting ...
Maximilian Hammer, Bryan Calder Ackermann, Anna Stoß, Niklas Junker, Ludwig Geisweid, Sabrina Wohlfart, Jonathan Herth, Simon William Pohl, Manuel Ben Böhmann, André Schulz, Victor Aristide Augustin, Gerd Uwe Auffarth, Philipp Uhl   +12 more
wiley   +1 more source

Failed Presidencies: Identifying and Explaining a South American Anomaly Presidencias fallidas: identificando y explicando una anomalía sudamericana

Journal of Politics in Latin America, 2009
Are presidential democracies inherently unstable and prone to breakdown? Recent work on Latin America suggests that the region has seen the emergence of a new kind of instability, where individual presidents do not manage to stay in office to the end of ...
Kathryn Hochstetler, Margaret E. Edwards
doaj  

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

Institutional Change in Latin America: External Models and their Unintended Consequences Cambio institucional en América Latina. Modelos externos y sus consequencias involuntarias

Journal of Politics in Latin America, 2009
Influential theories claim that institutions shape actor behavior but are sustained by these actors’ behavior. How do scholars escape from this trap of endogeneity? This article highlights a partially exogenous factor: institutional models and blueprints.
Kurt Weyland
doaj  

A Cu‐Based Near‐IR Active MOF with an Ion‐Pair Guest Exhibiting Versatile and Selective Gas‐Solid Reactivity

Advanced Materials, EarlyView.
The new Cu‐containing MOF (Me2NH2)(CuICl2)@[Cu4(INA)4Cl2O]·1.5dmf (3) contains a cation and an anion as guests and shows UV‐near‐mid‐IR absorption and near‐IR emission. MOF 3 shows gas‐solid reactivity in the presence of NH3 and HCOOH to yield two new 3D MOF.
Rajat Saha, Alejandro Cortés‐Villena, Silvia Gómez‐Coca, Alberto Fernández‐Alarcón, Joaquín Calbo, Raquel E. Galian, Enrique Ortí, Eliseo Ruiz, Mónica Giménez‐Marqués, Samia Benmansour, Carlos J. Gómez‐García   +10 more
wiley   +1 more source

Delegation, Presidential Regimes, and Latin American Regulatory Agencies Delegación, regimenes presidenciales y agencias reguladoras en América Latina

Journal of Politics in Latin America, 2010
During the 1990s, a large number of regulatory agencies were created or reformed in different sectors in Latin American countries. Almost all included political delegation mechanisms, intended as formal rules to enhance credible commitments to time ...
Jacint Jordana, Carles Ramió
doaj  

Study of quasi-two-body $$B_{(s)}\rightarrow \phi (f_0(980)/f_2(1270)\rightarrow )\pi \pi $$ B ( s ) → ϕ ( f 0 ( 980 ) / f 2 ( 1270 ) → ) π π decays in perturbative QCD approach

European Physical Journal C: Particles and Fields, 2021
In 2017, LHCb collaboration reported their first observation of the rare decays $$B_s \rightarrow \phi (f_0(980)$$ B s → ϕ ( f 0 ( 980 ) $$/f_2(1270) \rightarrow ) \pi ^+\pi ^-$$ / f 2 ( 1270 ) → ) π + π - and the evidence of $$B^0 \rightarrow \phi (f_0 ...
Zhi-Tian Zou, Lei Yang, Ying Li, Xin Liu
doaj   +1 more source

a0(980)→γγ and f0(980)→γγ: a consistent description [PDF]

Physics Letters B, 1999
Abstract We work out the Linear Sigma Model (LSM) predictions for the 2 γ decay rates of the a 0 (980), f 0 (980) mesons under the assumption that they are respectively the I =1 and I =0 members of the q q scalar nonet.
J.L. Lucio M., M. Napsuciale
openaire   +1 more source