The opencut tunnel is a kind of linear arch construction and new sand-prevention structure. In order to clarify the wind-proof mechanism tunnel, this paper seeks answer question whether Lin–Ce railway will be buried. paper, wind experiment combined with field investigation testing used systematically study sand resistance in an it verified burial possible. results show that airflow greater than...

Abstract The Mu Us Desert in China is significantly affected by seasonal freeze–thaw processes. In order to evaluate the adaptation potential of reconstituted soil with different proportions feldspathic sandstone and sand extreme environment, laboratory simulation freeze-thaw experiments was conducted study characteristics C N under conditions. results showed that content organic matter reached...

Abstract The concept of coastal sediment compartments has recently been adopted at a national scale in Australia to better understand and shoreline dynamics underpin management future behaviour response impacts climate change. Geomorphological studies southern NSW have provided foundation for development conceptual models estuary sandy barrier evolution. Geochronological reconstructions using r...

Micromorphological investigation of soils is a powerful tool for studying the transformation under influence various weathering mechanisms. In Arctic region, seasonal freezing/thawing processes, cryohydration leading type weathering. Soils different-aged islands Lena River Delta were investigated. Thin sections analyzed using polarizing microscope Leica DM750P (Leica Camera AG, Wetzlar, Germany...

Unlike green sand, chemically bonded sand cannot be used again and again without reclamation because in this system, the mixed sand gets it`s strength through chemical reaction which is irreversible in nature. Each sand particle is coated with this reacted chemical, which behaves like an inert element after usage once. This inert coating also called “Dead” binder needs to be removed from the us...

The accumulation of sand on desert roads poses a significant threat to the smooth transportation and driving safety these roads. To address this issue, combined approach using variable weight theory cloud model is proposed for conducting risk assessment An evaluation index system hazards obtained through analysis regional geomorphological conditions, wind dynamic engineering design factors. sys...

Shoot biomass production, alkaloid content and composition as influence by cadmium, manganese, nickel and lead at uniform dose of 5 mM were investigated in Catharanthus roseus plants grown in sand culture. Treatment with Mn, Ni, and Pb significantly enhanced total root alkaloid accumulation. Cd and Ni treatment resulted in two-fold where as Pb treatment resulted in three fold increase in serpen...

The accumulation of contaminating materials on the rotor blades of a gas turbine flowmeter is a condition of concern to the manufacturers, since it can lead to loss of calibration. Over time, a deposit of tar and heavy oil mixed with sand and dust can build up on the rotor blades, which causes the meter factor to change from its original value of calibration. A novel neural-network technique is...

We present the principles of variable pure polarization rotators based on the accumulation of a geometric phase that is obtained by coiling a beam of light via discrete reflections. They consist of two pseudo rotators in series. By changing the angle between the pseudo rotators the geometric phase acquired by the light is varied. We describe in detail two important examples: the variable-angle ...

We performed pollen analysis and accelerator mass spectrometry (AMS) radiocarbon dating on cored sediments (KS0412-3) from Kashibaru Marsh, located in the western part of the Sefuri Mountains in northern Kyushu, southwestern Japan, to investigate environmental change around the marsh. Sediment accumulation began in this marsh around cal AD 1200 and continued with an estimated average sedimentat...