Results 21 to 30 of about 2,770,785 (296)

Operation Mode and Energy Consumption Analysis of a New Energy Tower and Ground Source-Coupled Heat Pump System

open access: yesEnergies, 2023
In order to solve the problems of performance degradation in energy tower heat pump (ETHP) systems under low temperature conditions and soil heat imbalances in ground source heat pump (GSHP) systems in cold regions, a new coupled system of ETHP and GSHP ...
Yao Zhang   +4 more
doaj   +1 more source

Non-radiative decay and stability of $N$-heterocyclic carbene iridium(III) complexes [PDF]

open access: yes, 2018
Devices based on deep-blue emitting iridium (III) complexes with N-heterocyclic carbene (NHC) ligands have recently been shown to give excellent performance as phosphorescent organic light-emitting diodes (PHOLEDs).
Powell, Benjamin J., Zhou, Xiuwen
core   +2 more sources

OH-selected AGB and post-AGB stellar objects II.Blue versus red evolution off the AGB [PDF]

open access: yes, 2002
Using objects found in a systematic survey of the galactic Plane in the 1612-MHz OH line, we discuss in detail two ``sequences'' of post-AGB evolution, a red and a blue.
Bedijn P.   +13 more
core   +2 more sources

The LED Paradox: How Light Pollution Challenges Experts to Reconsider Sustainable Lighting [PDF]

open access: yes, 2019
In the 21st century, the notion of “sustainable lighting” is closely associated with LED technology. In the past ten years, municipalities and private light users worldwide have installed light-emitting diodes in urban spaces and public streets to save ...
Dannemann, Etta   +3 more
core   +1 more source

New energy sources: Blue energy study in Central America [PDF]

open access: yesJournal of Renewable and Sustainable Energy, 2017
Blue energy or salinity difference energy takes advantage of the free energy released in a mixture of two solutions with different salinity concentrations as it happens continuously in river mouths. Among the large number of available techniques that aim to harness blue energy, capmix (or capacitive mixing) methods allow to directly extract electrical ...
M. M. Fernández   +5 more
openaire   +2 more sources

The Consumption‐Based Carbon Emissions in the Jing‐Jin‐Ji Urban Agglomeration Over China's Economic Transition

open access: yesEarth's Future, 2021
Since the 2008 financial crisis, China has been undergoing an economic transition consisting of prioritizing green economic and sustainable development instead of rapid growth driven by large‐scale investment. However, there is still a lack of fine print
Yangchun Bai   +4 more
doaj   +1 more source

An Overview of Silica Scaling Reduction Technologies in the Geothermal Market

open access: yesEnergies
Renewable energy sources play a vital role in the energy mix with geothermal energy providing an opportunity to harness the natural heat coming from the Earth for sustainable power production.
Rochelle Longval   +3 more
doaj   +1 more source

Inflation and Alternatives with Blue Tensor Spectra

open access: yes, 2014
We study the tilt of the primordial gravitational waves spectrum. A hint of blue tilt is shown from analyzing the BICEP2 and POLARBEAR data. Motivated by this, we explore the possibilities of blue tensor spectra from the very early universe cosmology ...
Wang, Yi, Xue, Wei
core   +2 more sources

Electro-absorption of silicene and bilayer graphene quantum dots [PDF]

open access: yes, 2016
We study numerically the optical properties of low-buckled silicene and AB-stacked bilayer graphene quantum dots subjected to an external electric field, which is normal to their surface.
Abdelsalam, H.   +4 more
core   +2 more sources

The Environmental Risks Associated With the Development of Seaweed Farming in Europe - Prioritizing Key Knowledge Gaps

open access: yesFrontiers in Marine Science, 2019
Cultivation of kelp has been well established throughout Asia, and there is now growing interest in the cultivation of macroalgae in Europe to meet future resource needs.
Iona Campbell   +7 more
doaj   +1 more source

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