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FABRICATION OF FIBER BRAGG GRATINGS USING INFILTRATED HOLLOW CORE PHOTONIC CRYSTAL FIBERS

In this work, four fibers Bragg gratings were fabricated by infiltration different volumes of liquids (star line Glass Mechanix optical adhesive material, olive oil diluted with ethanol) into the hollow core photonic crystal fiber (HC19-1550 (Thorlab company)). The amplitude splitting interferometric technique with a high resolution specially designed translation stage was used for the fabrication process. This stage is capable of moving the fibers in micrometer resolution steps. The fabrication was carried out using blue laser operated at wavelength of 405 nm.
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THE EFFECT OF IMPROVING SURROUNDING SOIL ON FRICTION CAPACITY OF PILE

The improving of the pile surrounding soil still insufficiently studied. Many researchers treated with the surrounding soil to improve the pile capacity for resisting the lateral loads or liquefaction. Many methods of improvement are adopted to increase pile capacity .Compaction and replacing surrounding soil are adopted in this study as improvement method. Experimental work was executed on pile model using a compression machine. At first tests, were performed on soil to determine soil properties.

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DESIGN AND ANALYSIS OF A NON-ARTICULATED PROSTHETIC FOOT USING DEVELOPED COMPOSITE MATERIALS

 Prosthetic foot is considered one of the most important parts of prosthetic limbs because it is in direct contact with the ground and supporting the body of amputee. Developing designs and materials of prosthetic feet are very important field so as to improve their characteristics to produce better satisfaction for amputees. In this work, previous designs are studied, and new design foot was modeled depending on Niagara foot design. Three groups of new composite materials are prepared. First group is manufactured from polyethylene as a matrix and chopped carbon fibers.

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