sandwich panels as composite materials have two external walls of either metallic or polymer type. the space between these walls is filled by hard foam or other materials and the thickness of different layers is based on the final application of the panel. in the present work, the extent of variation in core density of polyether urethane foam and subsequent flexural and compressive changes in s...

This work examines the performance of composite panels when subjected to underwater impulsive loads. The scaled fluid–structure experimental methodology developed by Espinosa and co-workers was employed. Failure modes, damage mechanisms and their distributions were identified and quantified for composite monolithic and sandwich panels subjected to typical blast loadings. The temporal evolutions...

Impact resistance and damage tolerance remain major concerns in the design of laminated composite structures. Impact on flat panels has been the subject of extensive experimental and theoretical studies [1]. The work on curved panels is more limited although most laminates in aircraft wings and fuselages, as well as in other vehicles, are more or less curved. The existence of a delamination thr...

Respirator fit test panels provide an objective tool for selecting representative human test subjects based upon their facial characteristics for use in research, product development, testing and certification. Fit test panels were typically based upon anthropometric data such as the 1967-1968 survey of American military personnel. In this study, the objectives were to: (i) evaluate the applica...

The purpose of this research was to experimentally characterize the flexural and tensile characteristics of fiber-reinforced Very High-Strength Concrete (VHSC) panels. The panels were made with a unique mix of cementitous materials achieving compressive strength of 26,000 psi (180 MPa) or greater. VHSC panels were reinforced with polypropylene fibers of 1 inch (25.4 mm) in length and Polyvinyl ...

purpose: to evaluate the rate of optical coherence tomography (oct) grid decentration in a routine practice and its effect on thickness measurements methods: topcon spectral domain oct scans from various macular diseases including age related macular degeneration, diabetic macular edema, macular pucker and central serous chorioretinopathy (cscr) were studied in all patients visited during seven...

Much progress has been made in recent years in the area of information retrieval, in particular as embodied in Internet search engine technology. Much progress has also been made in probabilistic, graph-theoretic AI. What are the possibilities for bringing these two lines of research together — for viewing large-scale information retrieval as a core enabling technology for AI systems, and for a...

New sensing technologies, as RFID readers, are being incorporated into mobile devices to provide users with new interaction experiences. And, the combinations of these new technologies open up new challenging application scenarios. One of the areas that could exploit this potential is the design of interactive solutions for context-aware applications applied to learning environments. This artic...

As the greenhouse cultivation industry considers new ways to reduce energy demand and increase sustainable production, global crisis constitutes a major issue. In this paper, two different sources for heating cooling root zone area of baby leafy vegetables grown in hydroponic tanks by resistors chillers, respectively, were compared order fully cover power demand. The needs first case met public...