Results 81 to 90 of about 24,734 (245)

Impactos da aplicação de uma política de preço da água no regadio em Portugal: o caso da lezíria do Tejo Impacts of the application of a water charging policy in irrigated fields in Portugal: the lezíria do Tejo case

open access: yesRevista de Ciências Agrárias, 2009
A aplicação da Directiva-Quadro da Água, numa tentativa de promover a utilização sustentável da água (nomeadamente através da tarifação da água que reflicta o seu real custo), terá um impacto nas actividades económicas que dela dependem, em particular na
João Luís Varela   +1 more
doaj  

Gate‐Tunable Floquet Weyl Photon Emission from Topological Dirac Semimetal Cd3As2

open access: yesAdvanced Materials, EarlyView.
We report experimental demonstration of Floquet band engineering in a 3D Dirac semimetal. Circularly polarized light breaks the time reversal symmetry and transforms Cd3As2 into a Floquet–Weyl phase, splitting Dirac nodes into chirality‐opposite Weyl nodes with nonzero Berry curvature.
Sobhan Subhra Mishra   +4 more
wiley   +1 more source

Market mechanisms and their role in sustainable food security: Adapting to climate change in arid regions

open access: yesSustainable Futures
Climate change is likely to worsen Iran's food security system if no domestic adaptation or mitigation options are implemented. The main objective of this study is to examine the impact of market mechanisms on food security in Iran under climate change ...
Samira Shayanmehr   +7 more
doaj   +1 more source

Organic Materials of Tomorrow: Horizons of Artificial Intelligence

open access: yesAdvanced Materials, EarlyView.
This review examines machine learning techniques accelerating the discovery of organic semiconductors by linking molecular structure to properties. Key methods include graph neural networks, generative models, and active learning. Applications to organic photovoltaics demonstrate practical impact.
Harold Mena   +3 more
wiley   +1 more source

Resolving Heterogeneity of Targeted Lipid Nanoparticles Through Solution‐Based Biophysical Analyses

open access: yesAdvanced Materials, EarlyView.
AF4‐UV‐DLS‐MALS‐SAXS resolves previously inaccessible targeted lipid nanoparticle (tLNP) subpopulations that differ in size, shape, and composition. Correlation of subpopulation‐resolved biophysical properties with in vivo RNA delivery reveals that targeted placental transfection is associated with distinct tLNP subpopulations rather than ensemble ...
Hannah C. Geisler   +14 more
wiley   +1 more source

基于遗传-二次规划法的封闭差动人字齿轮传动系统混合优化设计

open access: yesJixie chuandong, 2014
Using the positive transmission way of modified gear,a mathematical optimization model of the encased differential herringbone gear transmission system is set up by taking the lightest gear weight of this transmission system as the optimization objective.
朱增宝, 朱如鹏, 尹敏
doaj  

Bioinspired Adaptive Surfaces for Intelligent Liquid Manipulation: Progressing From Passive and Active to Hybrid Strategies

open access: yesAdvanced Materials, EarlyView.
This review examines passive, active, and hybrid liquid manipulation strategies, highlighting hybrid approaches as an emerging route to reconcile energy efficiency with adaptive control. By actively reconstructing passive surfaces to store programmable interfacial energy, hybrid systems enable flexible yet low‐power liquid transport, with perspectives ...
Jiaqi Miao   +3 more
wiley   +1 more source

Analysis of the Economic and Welfare Impacts of Establishing Irrigation Water Market in Qazvin Province

open access: yesمجله اقتصاد و توسعه کشاورزی, 2014
In this study economic and welfare impacts of establishing irrigation water market in Qazvin province as well as potentiality of irrigation water transfer under stress irrigation conditions in the cities of Qazvin province were analyzed.
abouzar parhizkari
doaj  

From Fiber Bundles to Architected Membranes: Triply Periodic Minimal Surface Architectures for Biohybrid Artificial Lungs

open access: yesAdvanced Materials, EarlyView.
Additively manufactured triply periodic minimal surface (TPMS) membranes offer an architecture‐driven alternative to hollow fiber bundles in artificial lungs. Multiphysics simulations and endothelialized prototypes show that the 3D‐printable membrane architecture improves gas exchange, blood flow distribution, and hemocompatibility, enabling ...
Michael Pflaum   +14 more
wiley   +1 more source

Impact of Subsidy Policy on the Drip Irrigation Systems under Non-Volumetric and Volumetric Water Allocation in the Najafabad Aquifer

open access: yesعلوم آب و خاک, 2023
This study determines the amount of irrigation water saved as a result of the subsidy policy to adapt from flood to drip irrigation. We developed a positive mathematical programming model (PMP) to evaluate the effect of economic incentives on farmers ...
A. Yousefi   +3 more
doaj  

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