A review of studies focused on promoting the rate heat transfer with help an optimum rise in friction factor, by offering a simulated irregularity to interior surface absorber plate SAH, is expressed. In this article effort has been made explore different coarseness configurations as used number researchers boost SAH rate. Furthermore, correlations developed for Nusselt and factor are also pres...

The bond characteristics of deformed reinforcing bars are investigated ctnd design equations for development and splice lengths are obtained with the goal of improving the bond strength of steel reinforcing bars to concrete. The research includes both experimental and analytical studies. The experimental studies involved evaluating the performance of deformed steel reinforcing bars with differe...

We investigate shock response of single crystal and nanocrystalline pentaerythritol tetranitrate (PETN) with a coarse-grained model and molecular dynamics simulations, as regards mechanical hotspot formation in the absence or presence of grain boundaries (GBs). Single crystals with different orientations, and columnar nanocrystalline PETN with regular hexagonal, irregular hexagonal, and random ...

Groundwater level plays an important role in triggering landslides. In this paper, Distinct Element Method is used to investigate the impact of groundwater table fluctuation on stability jointed rock slopes. For purpose, 110 cases including different number joint sets, friction angles, spacings, and angles are considered influence changing a slope investigated through series parametric studies....

Near real time monitoring of natural disasters, mass events, and large traffic disasters with airborne SAR and optical sensors will be the focus of several projects in research and development at the German Aerospace Center (DLR) in the next years. For these projects, new airborne camera systems are applied and tested. An important part of the sensor suite plays the recently developed optical w...

Assigning difficulty level indicators to the knowledge units helps the learners plan their learning activities more efficiently. This paper focuses on how to use the topology of a knowledge map to compute and rank the difficulty levels of knowledge units. Firstly, the authors present the hierarchical structure and properties of the knowledge map. Then they propose three hypotheses of factors in...

The noise control characteristics of synchrophasing are investigated using a simplified model of an aircraft fuselage. The analysis presented includes directivity effects of the noise sources and solves the coupled motion between the interior and exterior acoustic fields and the shell vibrational response in closed form. The variation in sound pressure level at various locations inside the shel...

An e cient algorithm to accurately estimate depth and occluded points from two or more uncalibrated views is presented. The basic concept is to apply a dynamic programming technique for displacement estimation, after estimating the exact positions of two corresponding epipolar lines. The ultimate goal is to be able to automatically generate accurate 3-D models from two or more views of a scene ...

In a similar fashion to estimates shown for Harmonic, Wachspress, and Sibson coordinates in [Gillette et al., AiCM, to appear], we prove interpolation error estimates for the mean value coordinates on convex polygons suitable for standard finite element analysis. Our analysis is based on providing a uniform bound on the gradient of the mean value functions for all convex polygons of diameter on...

An e cient algorithm to accurately estimate depth and occluded points from two or more uncalibrated views is presented. The basic concept is to apply a dynamic programming technique for displacement estimation, after estimating the exact positions of two corresponding epipolar lines. The ultimate goal is to be able to automatically generate accurate 3-D models from two or more views of a scene ...