Results 21 to 30 of about 447,422 (304)

Remarks on the Cosmological Constant [PDF]

open access: yes, 2012
The acceleration of the surface of last scatter (SLS) must somehow reflect the energy content within it. A test particle at the SLS is assumed to experience a linear combination of two forces: one Newtonian, the other pseudo-Newtonian describable by a ...
Frampton, Paul H.
core   +3 more sources

Experimental study on pore structure and freezing characteristics of graded soils based on NMR

open access: yesYantu gongcheng xuebao, 2022
The freezing characteristics of pore water is the basis for studying the moisture and heat transfer and frost heave of frozen roadbeds. Based on the nuclear magnetic resonance (NMR) technology, the effects of the fine-grained soil type, the fine-grained ...
LIU Qian-qian 1, 2, CAI Guo-qing 1, 2, HAN Bo-wen 2, QIN Yu-teng 2, LI Jian 2
doaj   +1 more source

Study on the property and airflow grading of Ningxia coal gasification fine slag

open access: yesCleaner Chemical Engineering, 2022
Coal gasification fine slag (FS) is a solid waste of difficult-to-separate nature. In order to improve the reuse rate of coal gasification fine slag resources, so as to improve the value-added utilization and clean transformation for coal chemical ...
Ying Gao   +6 more
doaj   +1 more source

Multi-residues analysis of pre-emergence herbicides in fluvial sediments : application to the mid-Garonne River [PDF]

open access: yes, 2007
Contamination of man and ecosystems by pesticides has become a major environmental concern. Whereas many studies exist on contamination from agriculture, the effects of urban sources are usually omitted. Fluvial sediment is a complex matrix of pollutants
Devault, Damien A.   +4 more
core   +3 more sources

Experimental study of filtration & fine particles migration of calcareous sand in coral reef island

open access: yesRock and Soil Mechanics, 2021
Due to its unique biogenesis, forming environment and deposition process, calcareous sand is featured with irregularity, brittleness, weak structure and low cohesion, and is considered substantially different from the common terrestrial sand deposits ...
JU Yuan-jiang   +4 more
doaj   +1 more source

Experimental Study on Influence of Particle Redistribution on Seepage Characteristics of Reverse-Graded Deposits [PDF]

open access: yes长江科学院院报
[Objective] Reverse-graded deposits are prone to geological disasters under rainfall conditions. To comprehensively understand their seepage characteristics and disaster-causing mechanism, the indoor seepage test is conducted using typical deposits as ...
CUI Xian-ze, DING Wang-zong, FAN Yong, YANG Guang-dong, DING Sheng-yong
doaj   +1 more source

Global survey of limestone used in poultry diets: calcium content, particle size and solubility

open access: yesJournal of Applied Animal Nutrition, 2022
Limestone is used in poultry diets as a calcium (Ca) source. Feed formulation is often based on an estimate of limestone Ca content or, less frequently, wet chemistry analysis.
S. Gilani   +6 more
doaj   +1 more source

Effect of packing factor and fine aggregate/total aggregate ratio on the development of self-compacting concrete [PDF]

open access: yesE3S Web of Conferences, 2021
This paper presents the effect of packing factor and fine aggregate/total aggregate ratio on the performance of the self-compacting concrete (SCC). A higher PF value would imply a greater amount of the coarse and fine aggregates used, thus, decreasing ...
Sankeerth S V S   +3 more
doaj   +1 more source

On the stability of the anomaly-induced inflation [PDF]

open access: yes, 2002
We analyze various phases of inflation based on the anomaly-induced effective action of gravity (modified Starobinsky model), taking the cosmological constant Lambda and k=0, +/- 1 topologies into account. The total number of the inflationary e-folds may
A.M. Pelinson   +57 more
core   +3 more sources

The Effect of MICP on Physical and Mechanical Properties of Silt with Different Fine Particle Content and Pore Ratio [PDF]

open access: yesApplied Sciences, 2021
Microbial-induced calcium carbonate precipitation (MICP) is a new soil remediation technology, which can improve the physical and mechanical properties of soil by transporting bacterial solution and cementation solution to loose soil and precipitating calcium carbonate precipitation between soil particles through microbial mineralization. Based on this
Yang Zhao   +7 more
openaire   +2 more sources

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