Results 21 to 30 of about 263 (130)

Mixed Support for Pleistocene Sea‐Level Fluctuations in Promoting the Diversification of Anole Lizards in the Northern Lesser Antilles

open access: yesMolecular Ecology, Volume 35, Issue 14, July 2026.
ABSTRACT In the Pleistocene, climatic changes resulted in cycles of sea‐level fluctuation that periodically fragmented islands into aggregate island complexes. These temporary saltwater barriers between islands within an island bank had the potential to decrease migration between populations on separate islands, resulting in increased genetic ...
Ayanna J. Browne   +7 more
wiley   +1 more source

Snapshots of Motion: A Novel Structural Intermediate Reveals Conserved Dynamics in Archaeal DNA Ligases

open access: yesProteins: Structure, Function, and Bioinformatics, Volume 94, Issue 6, Page 1245-1258, June 2026.
ABSTRACT We present the first x‐ray crystallographic structural evidence of an archaeal DNA ligase showing the AMP covalent adduct together with further cofactor hydrolysis, capturing a transient intermediary in the first step of the ligation reaction, triggered by the pyrophosphate hydrolysis.
A. X. Quintana‐Armas   +3 more
wiley   +1 more source

Hiroshima-Nagasaki, Teherán: la amenaza nuclear

open access: yesRealidad, 2018
El quincuagésimo aniversario de la detonación de las bombas atómicas en las ciudades japonesas de Hiroshima y Nagasaki coincide con un momento en el cual la posesión de tecnología nuclear por parte de Irán es vista por los EE.UU.
Francisco Javier Ibisate
doaj   +1 more source

Forecasting Carbon Prices: A Literature Review

open access: yesJournal of Forecasting, Volume 45, Issue 2, Page 496-529, March 2026.
ABSTRACT Carbon emissions trading is utilized by a growing number of states as a significant tool for addressing greenhouse gas emissions (GHG), global warming problem and the climate crisis. Accurate forecasting of carbon prices is essential for effective policy design and investment strategies in climate change mitigation.
Konstantinos Bisiotis   +2 more
wiley   +1 more source

Mapping Quantum Computing Techniques for NP‐Hard Problems in Operations Management and Operations Research

open access: yesEngineering Reports, Volume 8, Issue 2, February 2026.
Quantum computing techniques such as Quantum Annealing and Quadratic Unconstrained Binary Optimization are effectively solving NP‐hard problems in operations management and research, particularly in logistics, manufacturing, and finance. This study maps these applications to present a framework for future adoption across industries. ABSTRACT This study
Daniel Bouzon Nagem Assad   +3 more
wiley   +1 more source

A nova doutrina nuclear dos EUA e a materialização do Hemisfério Sul livre de armas nucleares

open access: yesCarta Internacional, 2012
Em 2010, os EUA modificaram a sua doutrina nuclear, impondo restrições ao uso de armas nuclearesem possíveis conflitos bélicos. Os EUA afirmaram não usar tais armas contra países que não possuemesse tipo de armamento. Contrariamente, a Rússia, dias antes,
David Morales Martinez
doaj  

Common misconceptions in crystallography and crystal optics

open access: yesJournal of Applied Crystallography, Volume 59, Issue 1, Page 239-247, February 2026.
Six recurrent misconceptions in crystallography, some involving mineral and crystal optics, are analyzed and discussed. The explanation of these and similar misconceptions could serve as educational resources for teachers.Did you know that an X‐ray diffraction pattern is not a spectrum?
Lluís Casas
wiley   +1 more source

O TNP: GÊNESE E EVOLUÇÃO DA PERCEPÇÃO DO TRATADO POR PARTE DOS ESTADOS

open access: yesRevista da Escola de Guerra Naval, 2011
A questão das armas nucleares continua a figurar como um ponto central das Relações Internacionais. Os esforços e ações concretas para o desarmamento, a não-proliferação e o controle das armas nucleares continuam sendo temas que geram tensões ...
Marcos Valle Machado da Silva
doaj  

Forecasting SEP Atmospheric and Space Radiation by Coupling UMASEP and NAIRAS Models

open access: yesSpace Weather, Volume 24, Issue 1, January 2026.
Abstract The Nowcast of Aerospace Ionizing RAdiation System (NAIRAS) model predicts the radiation environment from the Earth's surface to free‐space. The model output provides dosimetric and particle flux quantities required to assess the hazardous radiation impacts to human health and adverse effects on vehicle electronic systems.
Christopher J. Mertens   +4 more
wiley   +1 more source

Paz y guerra: una perspectiva desde la actualidad

open access: yesCuestiones de Sociología, 2019
Raymond Aron publicó en 1962 el voluminoso libro Paz y guerra entre las naciones. Realiza en él un reconocido aporte para las teorí­as de las relaciones internacionales.
Pablo Bonavena, Flabián Nievas
doaj   +1 more source

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