Roll forming process is used for manufacturing sheet metal parts by successive bending and creating the final shape with gradual deformation. In this article, deformation of a pre-punched sheet due to the roll forming process was studied. Two main defects in the roll forming process are ovality of holes and bow defect. The ovality of the hole is influenced by the process parameters including sh...

A wireless sensor network (WSN) is one of the fundamental services provided by the monitoring of a specific Region of Interest (RoI). WSNs due to holes in RoI exposure is unavoidable considering the fact that the inner nature, environmental factors, random Uses, and external attacks, is to ensure that revenue is covered completely and consistently Key. This paper seeks to issue mobile WSNs hole...

A distributed algorithm is introduced which detects and recovers holes in the coverage provided by wireless sensor networks. It does not require coordinates, requiring only minimal connectivity information (for example, whether any two nodes are within either the sensing radius or twice the sensing radius.) The radio communications area is assumed to be larger than the sensed area. Two active n...

Despite the large lexicon of even broad coverage Natural Language Processing systems, there are many missing lexical items. We describe two methodologically distinct approaches to augment the lexicon: the look-up approach and the shotgun approach. Both approaches are framed within Sfy, a new research program to pull together several broad coverage systems. The classic look-up approach requires ...

UNLABELLED Organic-inorganic hybrid perovskite materials offer the potential for realization of low-cost and flexible next-generation solar cells fabricated by low-temperature solution processing. Although efficiencies of perovskite solar cells have dramatically improved up to 19% within the past 5 years, there is still considerable room for further improvement in device efficiency and stabilit...

The in-plane optical anisotropy which comes from the heavy-hole and the light-hole transitions in InAs submonolayers inserted in a ~311!-oriented GaAs matrix is studied by reflectance-difference spectroscopy ~RDS!. The steplike density of states obtained from RDS demonstrates that the ultrathin InAs layers should be regarded as two-dimensional quantum wells rather than isolated clusters, even f...

We report spectral results from three BeppoSAX observations of the black hole candidate XTE J1650–500 during its 2001/2002 outburst. We find strong evidence for the presence of a broad and strongly relativistic Fe emission line. The line profile indicates an accretion disc extending down to two gravitational radii suggesting the presence of a rapidly rotating central Kerr black hole. Thanks to ...

The use of mobile sensors is of great relevance to monitor hazardous applications where sensors cannot be deployed manually. Traditional algorithms primarily aim at maximizing network coverage rate, which leads to the creation of the “energy hole” in the region near the sink node. In this article, we are addressing the problem of redistributing mobile sensor nodes over an unattended target area...

MCG–5-23-16 is one of the first AGN where relativistic reverberation in the iron K line originating in the vicinity of the supermassive black hole was found, based on a short XMM-Newton observation. In this work, we present the results from long X-ray observations using Suzaku, XMM-Newton and NuSTAR designed to map the emission region using X-ray reverberation. A relativistic iron line is detec...