Results 11 to 20 of about 501,287 (253)

Energy-Efficient Clustering and Routing Using ASFO and a Cross-Layer-Based Expedient Routing Protocol for Wireless Sensor Networks

open access: yesSensors, 2023
Today’s critical goals in sensor network research are extending the lifetime of wireless sensor networks (WSNs) and lowering power consumption. A WSN necessitates the use of energy-efficient communication networks.
Venkatesan Cherappa   +5 more
doaj   +1 more source

An LLR-based Cognitive Transmission Strategy for Higher Spectrum Reutilization [PDF]

open access: yes, 2011
Reutilization of the spectrum licensed to services with low occupancy is of great interest for cognitive radios (CRs). To achieve this goal, we introduce a simple hidden Markov model which captures the primary users activity, signal uncertainties, and ...
Agrell, Erik   +2 more
core   +1 more source

The storage capacity of underground gas storages in the Czech republic [PDF]

open access: yes, 2019
Sources of natural gas are in most cases located in remote areas far from the places where the gas is utilized, i.e. especially developed industrial countries to which it is transported via pipeline. However, transit gas pipelines, which are transporting
Bujok, Petr, Klempa, Martin, Ryba, Jakub
core   +1 more source

Numerical Model Analysis of Myring–Savonius wind turbines

open access: yesInternational Journal of Engineering and Management Sciences, 2019
Nowadays the importance of renewable energy is growing, and the utilization of the low wind energy potential is getting crucial. There are turbines with low and high tip speed ratio.
M. Saleh, Ferenc Szodrai
doaj   +1 more source

Sustainable Energy Crop Production in Poland: Perspectives [PDF]

open access: yes, 2012
In the context of achieving the targets of the energy economy, Poland’s demand for bioenergy is stimulated by several factors, including the biomass potential of agricultural cultivation.
Grzesik, Mieczysław   +4 more
core   +2 more sources

Optimization of secondary user capacity in a centralized cooperative cognitive radio network with primary user under priority

open access: yesEngineering Reports, 2020
The primary objective of cognitive radio is to maximize the spectrum utilization and the capacity of secondary users under standard parametric constraints.
Sanjoy Debnath   +4 more
doaj   +1 more source

The ability of dryland farmer households in achieving food security in food-insecure area of East Nusa Tenggara, Indonesia

open access: yesAIMS Agriculture and Food, 2020
Dryland farmer households in food-insecure areas are faced with an unfavorable situation infertile agricultural land, low rainfall, lack of production activity and very limited infrastructure.
Erlyna Wida Riptanti   +3 more
doaj   +1 more source

A multi evaporator desalination system operated with thermocline energy for future sustainability [PDF]

open access: yes, 2018
All existing commercial seawater desalination processes, i.e. thermally-driven and membrane-based reverse osmosis (RO), are operated with universal performance ratios (UPR) varying up to 105, whilst the UPR for an ideal or thermodynamic limit (TL) of ...
Burhan, Muhammad   +3 more
core   +2 more sources

Implications of the European gas market for the long‐term construction of underground gas storage in China

open access: yesEnergy Science & Engineering, 2023
Underground gas storage (UGS) is an important part of the natural gas industry. Its peaking characteristics and storage capacity are critical to national energy supply and energy security.
Xueping Du   +4 more
doaj   +1 more source

Research on Heat Pump Seasonal Performance Factor

open access: yesZhileng xuebao, 2016
Heat pump is a machine for renewable energy recovery. Several units of renewable energy can be obtained with the consumption of one unit of electric or mechanical energy.
Ma Yitai, Dai Baomin
doaj   +2 more sources

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