Microgravity environments inside inhabited space stations are particularly challenging for service robots, being quite different from Earth in various ways. In this paper we propose and discuss the design and applicability of a collaborative aerial robot, called Space CoBot, to provide personal assistance to astronauts in microgravity environments. The platform is based on a modular holonomic a...

The current study is designed to analyze theslope stability of Haditha damwhich an earth-fill dam constructed on the Euphrates River in middle-west Iraq. Finite element modeling was used present combined seepage and post-earthquake slope earth dam. maximum water level a steady case considered evaluate seepage. - Three different levels (maximum, normal, minimum) were applied, nine equilibrium li...

seepage in earth fill dams is one of the important factors that may cause the erosion and slope instability if it is ignored. therefore, it is crucial to calculate the leakage discharge through the body of dam and foundation, to prevent economic and life hazards by considering technical and economical issues. in this research, the seepage analysis of the body and the stability of the upstream a...

The paper proposes an analytical homogenization procedure to predict the overall elastic properties of shot-earth, a sustainable composite material made excavated soil, aggregates and, if needed, binder for stabilization. A multi-step methodology based on Mori–Tanaka approach is used account stabilized soil inclusions. This proposed in order shorten mix-design procedures and readily provide str...

During the in situ leaching process of ion-adsorption rare earths, solution needs to be constantly injected mine slopes. As a consequence, landslides are highly likely occur due increasing water level soil mass. To solve this problem, we conducted mechanical analysis on rising after injection, which shed light principle slope instability brought about by level. With variation as major factor, e...

Erosion with the subsequent loss of soil and fertility is one urgent environmental problems worldwide. On grassland slopes from montane to alpine elevation zones European Alps, shallow erosion a widespread regionally increasing phenomenon. This group mechanical denudation processes includes landslides nival abrasion (i.e., by snow gliding avalanches), which are displacing patches vegetation, un...

This paper presents the results of experimental studies on deformation and strength anisotropy gravel-pebble soils used in soil dams. During stabilometric tests, varying shear angles were obtained for stone at different orientations particles working chamber, whether horizontal or vertical. As hydrostatic pressure chamber increased to 0.8 MPa, a reduction by 8-12 degrees depending direction lay...

Two poly(oxyethylene) derivatives 1.10-bis(2'-benzoic acid)-1,4,7,1-tetradecane (L1) and 1,7-bis(2'-benzoic acid)-1,4,7-trioxaheptane (L2) were used as suitable ionophores for the preparation of potassium-selective PVC-membrane electrodes. The resulting electrodes based on L1 and L2 exhibit linear responses to the activity of K+ ions within the concentration ranges of 3.1<em...