Results 171 to 180 of about 257,487 (338)

Hybrid Osprey‐Salp Swarm Optimization Algorithm for Single and Multiobjective Optimal Power Flow in Smart Grids With Renewable Energy Integration

open access: yesEnergy Science &Engineering, EarlyView.
The proposed hybrid osprey‐salp swarm optimization algorithm addresses optimal power flow (OPF) problems in smart grids incorporating solar, hydro, and thermal generators. The algorithm is validated on Institute of Electrical and Electronics Engineers 30‐, 57‐, and 118‐bus test systems across five single and multiobjective OPF scenarios.
Mujtaba Ali   +5 more
wiley   +1 more source

Comparative Experimental Efficiency of Solar Water Heating Systems With Enhanced Thermal Performance: A Review

open access: yesEnergy Science &Engineering, EarlyView.
This review presents a comparative analysis of experimental studies aimed at improving the thermal efficiency of solar water heating (SWH) systems. Various enhancement techniques, including nanofluids, phase change materials, optimized collector designs, and hybrid photovoltaic–thermal systems, are evaluated based on their impact on system performance ...
Oluwaseyi O. Alabi   +2 more
wiley   +1 more source

Microsimulation as a flexible tool to evaluate policies and their impact on socioeconomic inequalities in health. [PDF]

open access: yesLancet Reg Health Eur, 2023
Kopasker D   +13 more
europepmc   +1 more source

Nationalism, ethnicity and religion: Fundamental conflicts and the politics of identity in Tanzania [PDF]

open access: yes, 1999
Abebe Z.   +49 more
core   +1 more source

Skills, Aging, and Productivity: Evidence from Panel Data

open access: yes, 2016
The demographic change is one of the most important challenges for many developed economies in the twenty-first century. This paper examines the effect of workforce demographics and the distribution of skills on aggregated productivity and output ...
Kotschy, Rainer, Sunde, Uwe
core  

Comparative Performance Analysis of Various Flat Plate Solar Collectors Incorporating Spiral and Square Arrangement of Circular Type Riser Tube

open access: yesEnergy Science &Engineering, EarlyView.
Three flat‐plate collectors with spiral and square coiled riser tubes were tested and it was found that the spiral type provides the best results with a thermal efficiency of 66.98% for a mass flow rate of 0.4 kg/min. Riser tube geometry is a key factor in optimizing flat‐plate collector output.
Sakhail Islam Biaz   +4 more
wiley   +1 more source

SOURCES OF AGRICULTURAL GROWTH IN JAPAN, 1880-1965 [PDF]

open access: yes
International Development,
Akino, Masakatsu, Hayami, Yujiro
core   +1 more source

Can Evaluation Policies Survive Democratic Erosion? Safeguarding Independence in International Organizations

open access: yesNew Directions for Evaluation, EarlyView.
ABSTRACT International organizations' (IOs) evaluation policies face unprecedented threats from post‐truth dynamics—delegitimization of expertise, nationalist framing against multilateralism, authoritarian overconfidence, and anti‐scientific sentiment. Despite institutional convergence on independence safeguards, methodological standards, and normative
Mita Marra
wiley   +1 more source

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