Results 71 to 80 of about 1,628,957 (314)

Freshwater fish functional diversity shows diverse responses to human activities, but consistently declines in the tropics

open access: yesEcography, EarlyView.
Freshwater environments are intertwined with human activities and the consequence has been environmental degradation and biodiversity loss. Fish provide key ecological and economic benefits, and fish abundance and diversity can be affected by human activities resulting in functional diversity (FD) changes that might scale up to ecosystem impacts ...
Romullo Guimarães de Sá Ferreira Lima   +3 more
wiley   +1 more source

High‐Titanium Zircon Rims in Rhyolite – A Reflection of Adiabatic Ascent?

open access: yesGeological Journal, EarlyView.
The ascent of granitic magma from source to emplacement is rapidly achieved through dyking, resulting in negligible heat loss to the surrounding wallrock (i.e., adiabatic). Zircon growth during ascent can record the changing magma conditions including adiabatic cooling and heating, resulting in high titanium rims on low titanium cores without ...
Carson Kinney   +2 more
wiley   +1 more source

Drill/borescope System for the Mars Polar Pathfinder [PDF]

open access: yes
The primary goals of the Mars Polar Pathfinder (MPP) Discovery Mission are to characterize the composition and structure of Mars' north polar ice cap, and to determine whether a climate record may be preserved in layers of ice and dust.
Paige, D. A.   +2 more
core   +1 more source

Method for determination of water hammer conditions and consequences inpressurizers of nuclear reactors

open access: yesTURKISH JOURNAL OF PHYSICS, 2019
Results of known experimental and computed studies of conditions for water hammers (WHs) in reactor pressurizers are analyzed. It is found that when emergency opening of pilot-operated safety valves of the pressurizers of nuclear reactors happens, WHs can be generated on pressurizer elements, and amplitudes of hydrodynamic load pulses significantly ...
Vladimir SKALOZUBOV   +4 more
openaire   +1 more source

A twofold development and demise of pine stands in the Netherlands during the Allerød interstadial: two hypotheses to explain a link to climate change recorded in Greenland ice

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT The second half of the Allerød interstadial in the Netherlands is characterised by pine forest. Excavated trunks of 165 pine trees at Leusden‐Den Treek in the central Netherlands (LETR16) were dated by dendrochronology and radiocarbon. Two chronologically separated pine forest phases occurred during relatively warm periods as recorded in ...
Wim Z. Hoek   +4 more
wiley   +1 more source

Laboratory investigation on stone matrix asphalt using banana fiber [PDF]

open access: yes, 2012
The technology and usage of the asphalt materials and mixtures is first discovered and mostly used in European countries and North America. The SMA (stone matrix asphalt) mixture is a gap-graded mix which is characterized by high coarse aggregates, high
Ravada, S Dikshith
core  

Compact Layers of Hybrid Halide Perovskites Fabricated via the Aerosol Deposition Process : Uncoupling Material Synthesis and Layer Formation [PDF]

open access: yes, 2016
We present the successful fabrication of CH3NH3PbI3 perovskite layers by the aerosol deposition method (ADM). The layers show high structural purity and compactness, thus making them suitable for application in perovskite-based optoelectronic devices. By
Gujar, Tanaji P.   +6 more
core   +2 more sources

Numerical modeling of cavitation induced water hammer using finite volume method

open access: yesIOP Conference Series: Materials Science and Engineering
Abstract A water hammer is a pressure surge caused by the sudden stoppage of a moving liquid, typically due to rapid valve closure or pump shutdown. This abrupt momentum change generates a powerful pressure wave that can damage pipes and reduce component efficiency.
R Kalla, A Garva, P Ghosh
openaire   +1 more source

Deglaciation of the Burren glacio‐karst, western Ireland, during Termination 1: Implications for North Atlantic climate and karstification

open access: yesJournal of Quaternary Science, EarlyView.
Abstract The Burren uplands in western Ireland form one of the most extensive and best‐preserved examples of glacio‐karst in Europe. Subsumed by the Irish ice sheet during the Late Pleistocene, granite erratic boulders and in situ silica veins in the limestone bedrock provide a rare opportunity to reconstruct the timing and rate of deglaciation ...
Gordon Bromley   +4 more
wiley   +1 more source

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