Cable plants were initially designed for one-way broadcast communication (from the head-end to the neighborhood). They are now being upgraded to provide an upstream path (from the home to the head-end). New challenges arise in using the upstream channel since the available bandwidth is low and the noise levels are high. In this paper we present a MAC protocol especially designed to eeciently sh...

M yosins comprise a diverse family of molecular motor enzymes that use the energy from cycles of ATP binding, hydrolysis, and product release to perform mechanical work along actin filaments. Although all characterized myosins share a conserved catalytic motor domain, referred to as ‘‘head,’’ variations in enzymatic and structural properties allow different myosins to generate diverse types of ...

A biomechanical test is a good evaluation method that describes the structural, functional, and pathological differences in the bones, such as osteoporosis and fracture. The tensile test, compression test, and bending test are generally performed to evaluate the elastic modulus of the bone using mice. In particular, the femoral head compression test is mainly used for verifying the osteoporosis...

OBJECT Falls are the most common accident scenario in young children as well as the most common history provided in child abuse cases. Understanding the biomechanics of falls provides clinicians with objective data to aid in their diagnosis of accidental or inflicted trauma. The objective of this study was to determine impact forces and angular accelerations associated with low-height falls in ...

A test program was conducted to determine the effectiveness of a seat belt restraint in preventing occupant movement in a rollover accident. A baseline type-2 seat belt (pelvic and torso restraint), and an improved type-2 seat belt restraint, both designed to restrict occupant motion in a rollover accident, were tested in a rollover restraints tester (RRT). Each seat belt was placed on a H-III ...

Neck muscles stiffen and stabilize the cervical spine; however, their influence during ex vivo axial impact experiments has previously only been examined for highly simplified musculature. The objective of this study was to create a model of head-first impact with simulation of several major neck muscles, using a Hybrid III ATD head and cadaver cervical spine, to create compressive cervical spi...

Due to the condition of the original material, there are unavoidable flaws in this reproduction. We have made every effort possible to provide you with the best copy available. If you are dissatisfied with this product and find it unusable, please contact Document Services as soon as possible. Abstract The mechanics of skin is as central to touch as optics is to vision and acoustics is to heari...