The electronic ground-state properties of Fe/semiconductor/Fe~001! tunnel junctions are studied by means of the ab initio screened Korringa-Kohn-Rostoker method. We focus on the magnetic properties, charge transfer, local, and qi-resolved density of states of these systems. We consider in detail Fe/ZnSe/Fe~001! tunnel junctions and compare their electronic properties with junctions with Si and ...

BACKGROUND Commercially available flexible reamer and curved guide systems allow a certain degree of control over intra-articular tunnel orientation, therefore allows a wide range of intra-osseous femoral tunnel orientations, contrary to the femoral tunneling technique using a straight guide pin, which are determined by knee flexion angle. We sought to find the clinical relevance of intra-osseo...

Smart and automated maintenance could make the system its parts more sustainable by extending their lifecycle, failure detection, smart control of equipment, precise detection reaction to unexpected circumstances. This article focuses on analysis data, particularly logs captured in several Czech tunnel systems. The objective is find useful information for predicting upcoming situations, further...

Based on practical engineering, considering the characteristics of unsymmetrical loading, shallow burying, and weak surrounding rock tunnel, MIDAS finite element software is adopted to analyze influence effect deformation a temporary steel support when tunnel excavated by two-step center diaphragm method (CDM). The simulation results are compared with field monitoring results. It can be seen th...

Estimation of tunnel diameter convergence is a very important issue for tunneling construction, especially when the new Austrian tunneling method (NATM) is adopted. For this purpose, a systematic convergence measurement is usually implemented to adjust the design during the whole construction, and consequently deadly hazards can be prevented. In this study, a new fuzzy model capable of predicti...

NASA Ames Research Center has developed several advanced distributed information systems to assist the distribution, analysis and management of data from experimental and numerical tests on aircraft wings and other aeronautical components. These systems provide immediate access to numerical aeronautics simulations and redefine the analysis operations for classic wind tunnel tests. The informati...