Silicon carbide nanofibers grew on the surface of carbon fibers of a unidirectional carbon preform by CCVD and then chemical vapor infiltration was used to densify the preform to get the SiCNF-C/C composite. The effects of silicon carbide nanofibers on the microstructure of the pyrolytic carbon and the thermal conductivity of the SiCNF-C/C composite were investigated. Results show that silicon ...

A unidirectional link exists in an ad-hoc network when a node B is within the transmission range of another node A while node A cannot directly hear node B. However, a reverse route from B to A might exist, by going through multiple nodes. Unidirectional links may exist in an ad hoc network due to variation in transmission power of different nodes, noise or other signal propagation phenomena, a...

In recent years, the hybridization of natural fibers with synthetic has received much attention. This paper conducted an experimental study on tensile and flexural behavior unidirectional carbon/flax fiber reinforced epoxy composites single flax fibers. Four rates were considered for 16 layers in a symmetric staking sequence, carbon ply at surface. The damage evolution under load increase was m...

PURPOSE Fractures in acrylic resin dentures occur quite often in the practice of prosthodontics. A durable repairing system for denture base fracture is desired to avoid recurrent fracture. The purpose of this study was to evaluate the fracture force, deflection, and toughness of a heat-polymerized denture base resin repaired with autopolymerized resin alone (C), visible light-polymerizing resi...

In this paper, we propose and experimentally demonstrate an ultra-long distributed fiber vibration sensing system using unidirectional forward transmission of a continuous-wave signal coherent detection with digital processing. Two optical fibers, which are close to each other, deployed for sensing. A loop-back configuration is formed by splicing these two fibers at the far end fibers. The loca...

Optically controlled delay lines in optical fibers are demonstrated by use of the group-velocity control of signal pulses based on stimulated Brillouin scattering. We achieve continuous time delay within the range of 150 ns, much larger than the width of the 40 ns signal pulse, using cascaded fiber segments joined by unidirectional optical attenuators. In the meantime, we also observe a large a...

Regeneration of neural injuries by formation of new axons and myelination to improve quality of patient life is undeniable difficulty in the world in which scientists examined different strategies from ancient times. Recently, 3D tissue engineering scaffolds simulated original extracellular matrix (ECM) and provide desirable substrate for cellular attachment, proliferation and differentiation. ...