background: carpal tunnel syndrome is the most common focal mono-neuropathy. a study was designed to compare the effects of traditional open carpal tunnel release with median neurolysis and z-plasty reconstruction of the transverse carpal ligament on post-operative hand pain and hand function in patients with idiopathic carpal tunnel syndrome.   methods: fifty-two patients with idiopathic carpa...

We investigate the initiation and early-stage propagation of an axi-symmetric hydraulic fracture from a wellbore drilled in the direction of the minimum principal stress in an elastic and impermeable formation. Such a configuration is akin to the case of a horizontal well and a hydraulic fracture transverse to the well axis in an open hole completion. In addition to the effect of the wellbore o...

This study presents a multiscale method to evaluate the transverse tensile strength and failure mechanism of SiCf/TC17 cruciform specimen machined from large-size ring. The mechanical properties were evaluated through macroscale model under loading at 200 °C. A mesoscale was developed analyze behavior composite specimen. Interfacial debonding, plastic deformation matrix cladding, damage core in...

During the operation of proton exchange membrane in fuel cells, cyclic mechanical loads are introduced due to humidity cycles. The resulting fatigue crack is known be main source for its degradation. In this paper, we use a relation between damage evolution cohesive elements and Paris law simulate biaxial growth. effects various loading conditions investigated. predicted growth good agreement w...

modelling of crack propagation by finite element method under mixed mode conditions is of prime importance in fracture mechanics. this paper describes an application of finite element method to the analysis of mixed mode crack growth in linear elastic fracture mechanics. crack growth process is simulated by an incremental crack-extension analysis based on the maximum principal stress criterion,...

The noncontact and wide-band characteristics of the ultrasonic signal excited by laser make it widely used in nondestructive detection. In this paper, finite element method is to simulate multiple modes responses them metal defects. simulation shows that changes Rayleigh-wave (RW) shear-wave (SW) can be research surface crack internal defect sample respectively. By analyzing reflected wave RW S...

OBJECTIVES HIV prevalence among people who inject drugs (PWID) in Ottawa is estimated at about 10%. The successful integration of peers into outreach efforts and wider access to HIV point-of-care testing (POCT) create opportunities to explore the role of peers in providing HIV testing. The PROUD study, in partnership with Ottawa Public Health (OPH), sought to develop a model for community-based...

OBJECTIVE To examine relationships between parenting behaviors, parent-child relationship, and moderating effects of age on youth substance use among a community sample of African-American mothers who use crack cocaine and their children (12-17 years). METHODS Maternal-child dyads (n = 208) were recruited through street outreach and snowball sampling and completed interviews about substance u...

in this paper, the crack detection and depth ratio estimation method are presented in beamlikestructures using elman networks. for this purpose, by using the frequencies of modes asinput, crack depth ratio of each element was detected as output. performance of the proposedmethod was evaluated by using three numerical scenarios of crack for fixed-simply supportedbeam consisting of a single crack...