A laboratory study of the initial structure and the overconsolidation effects on the undrained monotonic behavior of sandy soil from Chlef region in northern Algeria

2010 ◽  
Vol 4 (5-6) ◽  
pp. 983-991 ◽  
Author(s):  
Noureddine Della ◽  
Ahmed Arab ◽  
Mostefa Belkhatir
Keyword(s):  
Sandy Soil ◽  
Laboratory Study ◽  
Initial Structure ◽  
Northern Algeria

Influence of Initial Conditions on Liquefaction Resistance of Sandy Soil from Chlef region in Northern Algeria

2016 ◽  
Vol 34 (6) ◽  
pp. 1971-1983 ◽  
Author(s):  
Noureddine Della ◽  
Rawaz Dlawar Muhammed ◽  
Jean Canou ◽  
Jean Claude Dupla
Keyword(s):  
Sandy Soil ◽  
Initial Conditions ◽  
Liquefaction Resistance ◽  
Northern Algeria

Laboratory Study on Shear Strength Behaviour of Reinforced Sandy Soil: Effect of Glass-Fibre Content and Other Parameters

2015 ◽  
Vol 41 (4) ◽  
pp. 1343-1353 ◽  
Author(s):  
Ismail Benessalah ◽  
Ahmed Arab ◽  
Pascal Villard ◽  
Marwan Sadek ◽  
Abdelkader Kadri
Keyword(s):  
Shear Strength ◽  
Sandy Soil ◽  
Laboratory Study ◽  
Glass Fibre ◽  
Fibre Content

A laboratory study of shear strength of partially saturated sandy soil

2021 ◽  
pp. 1-10
Author(s):  
Krim Abdallah ◽  
Brahimi Abdelkader ◽  
Arab Ahmed ◽  
Bouri Djamel Eddine ◽  
Sadek Marwan
Keyword(s):  
Shear Strength ◽  
Sandy Soil ◽  
Laboratory Study ◽  
Partially Saturated

A laboratory study on the lateral resistance of single piles with different cross-section shapes in a sandy soil

2021 ◽  
Vol 14 (23) ◽  
Author(s):  
Meysam Memar ◽  
Amir Hossein Vakili ◽  
Seyed Mohamad Ali Zomorodian ◽  
Mohammad Sadegh Farhadi
Keyword(s):  
Cross Section ◽  
Sandy Soil ◽  
Laboratory Study ◽  
Lateral Resistance ◽  
Single Piles

Laboratory study of geotextiles performance on reinforced sandy soil

2016 ◽  
Vol 27 (6) ◽  
pp. 1060-1070 ◽  
Author(s):  
Brahim Abdelkader ◽  
Arab Ahmed ◽  
Belkhatir Mostéfa ◽  
Shahrour Isam
Keyword(s):  
Sandy Soil ◽  
Laboratory Study

scholarly journals Changes of Some Phisiological Processes and Yield of Winter Wheat and Triticale Under the Influence of Sprinkling Irrigation and Nitrogen Fettilizastion. Part 1. Chlorophyll and Carotenoid Content in Some Organs of Winter Wheat and Triticale

2013 ◽  
Vol 46 (1) ◽  
pp. 15-30 ◽  
Author(s):  
Stanisław Kaczmarczyk ◽  
Zdzisław Koszański ◽  
Cezary Podsiadło
Keyword(s):  
Winter Wheat ◽  
Sandy Soil ◽  
Laboratory Study ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Photosynthetic Activity ◽  
Flag Leaf ◽  
Carotenoid Content ◽  
High Nitrogen

The aim of the field and laboratory study was to determine effects of nitrogen fertilization and sprinkling irrigation on chlorophyll and carotenoid content in the flag leaf, shank and spike of winter wheat and triticale cultivated on a sandy soil. Obtained results show that the applied treatments (nitrogen and sprinkling irrigation) significantly increased the yield of dry matter of the tested organs, and their chlorophyll and carotenoid content. Compared to winter wheat a higher concentration of the pigments was found in triticale. Sprinkling irrigation in high nitrogen fertilization inhibited the process of pigment decomposition of and hence the time of photosynthetic activity of the tested plants was extend.

Laboratory and in-situ analysis of comet dust

1988 ◽  
Vol 46 ◽  
pp. 8-9
Author(s):  
D.E. Brownlee ◽  
A.L. Albee
Keyword(s):  
Electron Microscopy ◽  
Solar System ◽  
Laboratory Study ◽  
Isotopic Analysis ◽  
Building Blocks ◽  
Sem Analysis ◽  
Early Solar System ◽  
Cometary Material ◽  
Comet Dust

Comets are primitive, kilometer-sized bodies that formed in the outer regions of the solar system. Composed of ice and dust, comets are generally believed to be relic building blocks of the outer solar system that have been preserved at cryogenic temperatures since the formation of the Sun and planets. The analysis of cometary material is particularly important because the properties of cometary material provide direct information on the processes and environments that formed and influenced solid matter both in the early solar system and in the interstellar environments that preceded it.The first direct analyses of proven comet dust were made during the Soviet and European spacecraft encounters with Comet Halley in 1986. These missions carried time-of-flight mass spectrometers that measured mass spectra of individual micron and smaller particles. The Halley measurements were semi-quantitative but they showed that comet dust is a complex fine-grained mixture of silicates and organic material. A full understanding of comet dust will require detailed morphological, mineralogical, elemental and isotopic analysis at the finest possible scale. Electron microscopy and related microbeam techniques will play key roles in the analysis. The present and future of electron microscopy of comet samples involves laboratory study of micrometeorites collected in the stratosphere, in-situ SEM analysis of particles collected at a comet and laboratory study of samples collected from a comet and returned to the Earth for detailed study.

Field ion microscope investigations of atomic processes at surfaces

1989 ◽  
Vol 47 ◽  
pp. 228-229
Author(s):  
G. L. Kellogg ◽  
P. R. Schwoebel
Keyword(s):  
Single Crystal ◽  
Crystal Surface ◽  
Linear Chain ◽  
Atom Probe ◽  
Nucleation And Growth ◽  
Single Atom ◽  
Initial Structure ◽  
Atomic Processes ◽  
Single Crystal Surfaces ◽  
Field Ion Microscope

Although no longer unique in its ability to resolve individual single atoms on surfaces, the field ion microscope remains a powerful tool for the quantitative characterization of atomic processes on single-crystal surfaces. Investigations of single-atom surface diffusion, adatom-adatom interactions, surface reconstructions, cluster nucleation and growth, and a variety of surface chemical reactions have provided new insights to the atomic nature of surfaces. Moreover, the ability to determine the chemical identity of selected atoms seen in the field ion microscope image by atom-probe mass spectroscopy has increased or even changed our understanding of solid-state-reaction processes such as ordering, clustering, precipitation and segregation in alloys. This presentation focuses on the operational principles of the field-ion microscope and atom-probe mass spectrometer and some very recent applications of the field ion microscope to the nucleation and growth of metal clusters on metal surfaces.The structure assumed by clusters of atoms on a single-crystal surface yields fundamental information on the adatom-adatom interactions important in crystal growth. It was discovered in previous investigations with the field ion microscope that, contrary to intuition, the initial structure of clusters of Pt, Pd, Ir and Ni atoms on W(110) is a linear chain oriented in the <111> direction of the substrate.

Sign in / Sign up

Export Citation Format

Share Document