نتایج جستجو برای: earth slopes
تعداد نتایج: 107563 فیلتر نتایج به سال:
Recently, we succeeded in detwinning REBa2Cu3O7 (RE123, RE = rare-earth elements)-coated conductors by annealing under an external uniaxial strain. Using the untwinned RE123 tapes, the uniaxial-strain dependencies of the critical temperature Tc along the a and b crystal axes were investigated over a wide strain region from compression to tension. We found that the strain dependencies of Tc for ...
Geomorphological landforms are generally viewed as Boolean objects. However, recent studies have shown that landforms are more suitable to be viewed as fuzzy objects, whereby a landform is defined as a region in the continuum of variation of the surface of the earth. In this paper, the fuzzy classification of physiographic features extracted from multiscale DEMs is performed. First, the lifting...
The national planners have put infrastructures development on priority. This has resulted in transport planning widening of National Highway and new roads in country. Thus work of Retaining Earth (RE) structures/ slopes will be going to design in very large numbers over different areas. The availability of backfill material compatible with geosynthetics reinforcements and economy in both has be...
During the 2003 Mars Exploration Rover (MER) mission, onboard rover localization has been performed primarily by IMU, wheelodometry, and sun-sensing technologies. In cases where the rover experiences slippage caused by traversing loose soil or steep slopes, particularly in a crater, the onboard visual odometry (VO) technique is applied. A bundle adjustment (BA) method has been performed on Eart...
Two field studies with six large aperture scintillometers (LASs) were performed using horizontal and slant paths. The accuracy of this novel and increasingly popular technique for measuring sensible heat fluxes was quantified by comparing measurements from different instruments over nearly identical transects. Random errors in LAS measurements were small, since correlation coefficients between ...
this paper discusses some of the fundamental considerations when managing mining slopes. the goal of management is to reduce all components that contribute to the geotechnical risk and by doing so reduce the risk to as low as reasonably achievable. the techniques and procedures suggested are not exhaustive; they represent a snapshot of some of the practical techniques the author has found usefu...
Sodium rare earth fluorides, NaREF4 (RE = earth), are used as luminescent materials for light emission and biomedical applications important compositions extracting separating RE elements. Solution calorimetric measurements of a series ?-structured (Na1.5RE1.5F6) phases with various elements determined their heats formation. Though the lattice contracts from to heavy elements, compounds show mo...
Hydrothermal processes have been suggested to explain a number of observations for Mars, including D/H ratios of water extracted from Martian meteorites, as a means for removing CO2 from the Martian atmosphere and sequestering it in the crust as carbonates, and as a possible origin for iron oxide-rich spectral units on the floors of some rifted basins (chasmata). There are numerous examples of ...
Accelerating Anthropogenic Land Surface Change and the Status of Pleistocene Drumlins in New England
Drumlins are glacially derived landforms that are prominent in the landscape over much of southern New England. We carried out a comprehensive ground-based survey in a three-town study area in eastern Massachusetts with the goals of establishing the extent to drumlins have been altered and assessing the associated environmental consequences and probable driving factors. Results show that many d...
[1] Channeled lava flows, hundreds of kilometers long, are common on the lower flanks of the Tharsis Montes on Mars. Our analysis of a 690-km-long lava flow along the southwest perimeter of Ascraeus Mons shows that it was emplaced on low local slopes (<0.3 ), with a deep channel ( 20 m), and at high effusion rates (19,000–29,000 m/s) calculated from the Graetz number. These parameters are simil...
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