Results 41 to 50 of about 2,859 (209)

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira   +4 more
wiley   +1 more source

Strategic Nuclear and Non-Nuclear Deterrence in Russia’s National Security Policy

open access: yesВестник Московского Университета. Серия XXV: Международные отношения и мировая политика
In the present context of a sharp aggravation of interstate rivalry and escalation of traditional and new threats, the importance of policy, forces and means of strategic deterrence in ensuring Russia’s national security cannot be overstated. Fundamental
A. A. Kokoshin
doaj   +1 more source

Zinc and Strontium‐Doped Titania Nanotube Surfaces Enhance Antibacterial Activity and Increase Osteogenic Differentiation of Mesenchymal Stem Cells

open access: yesAdvanced NanoBiomed Research, EarlyView.
Bacterial infection and poor integration often lead to orthopedic implant failure. Modifying implant surfaces can improve osseointegration. Titanium has been engineered to form titania nanotubes doped with zinc and strontium. These surfaces were evaluated for antibacterial effects and their ability to promote osteogenic differentiation in stem cells ...
Abhishek Bhattacharjee   +4 more
wiley   +1 more source

Deterrence in Indo-Pak Context: A Critical Appraisal

open access: yesPolicy Perspectives, 2016
It was an imbalance in the conventional power that forced Pakistan to see nuclear weapons' capability, as a deterrence against India, after the war of 1971 that resulted in separation of former East Pakistan.
Ahmad Khan, Ali Ahsan
doaj   +1 more source

Heat Stress and Gut Microbiome Dynamics in Poultry: Interplay, Consequences, and Mitigation Strategies

open access: yesAnimal Research and One Health, EarlyView.
Heat stress disrupts gut microbial balance in poultry, impairing nutrient absorption and immunity. This review outlines the interplay between thermal stress and microbiome dynamics and discusses integrative mitigation strategies, probiotics, phytogenics, cooling systems, and genetic adaptation to enhance poultry resilience.
O. E. Oke   +9 more
wiley   +1 more source

STRATEGIC TRANSFORMATIONS: INDIA'S PURSUIT OF COUNTERFORCE TARGETING AND REGIONAL STABILITY

open access: yesMargalla Papers, 2023
In the intricate web of South Asia's security dynamics, India and Pakistan's relationship holds the key to equilibrium. Geographical proximity demands swift responses, prompting India's strategic shift towards Counterforce targeting.
Mubeen Ashraf , Syed Saif ul Haq
doaj  

Prioritizing Feasible and Impactful Actions to Enable Secure AI Development and Use in Biology

open access: yesBiotechnology and Bioengineering, EarlyView.
ABSTRACT As artificial intelligence continues to enhance biological innovation, the potential for misuse must be addressed to fully unlock the potential societal benefits. While significant work has been done to evaluate general‐purpose AI and specialized biological design tools (BDTs) for biothreat creation risks, actionable steps to mitigate the risk
Josh Dettman   +4 more
wiley   +1 more source

Japan: A Nuclear State?

open access: yesRevista Brasileira de Política Internacional, 2019
Japan is often seen as pacifist and as a defender of nuclear disarmament. This article, though, sustains that Japan is basing its security on extended nuclear deterrence, and on the possibility of acquiring nuclear weapons.
Henrique Altemani de Oliveira
doaj   +1 more source

Early evolutionary history of the seed

open access: yesBiological Reviews, EarlyView.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman   +2 more
wiley   +1 more source

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