1. The mesothoracic wings of tettigoniid insects are used in song production and flight; the metathoracic wings in flight only. In Neoconocephalus triops the wing stroke frequency during flight is about 25 Hz; the frequency during singing about 100 Hz. 2. The twitch duration of mesothoracic, first tergocoxal (Tcxl) wing muscles is only about one-half the duration of the upstroke or downstroke p...

BACKGROUND Within traumatology a common indication for acute surgery of fractured clavicles is bone shortening over 2 cm. This indication is among but a few indications; which are recommended to be treated operatively within the very first weeks after a fracture. Theoretically clavicle fractures could become less shortened over time due to decreasing muscle pull. If this reduced shortening does...

Background and purpose - Controversies exist regarding thromboprophylaxis in orthopedic surgery. Using data in the nationwide Norwegian Hip Fracture Register (NHFR) with postoperative death and reoperation in the first 6 months after surgery as endpoints in the analyses, we determined whether the thromboprophylaxis in patients who undergo hemiarthroplasty for femoral neck fracture should start ...

The results of Section 5 are of this sort. One sometimes hears the question: Is a GA more powerful than an equal population of hill-climbers, and if so, why? The answer seems to be yes, as noted. But why? Perhaps the basic reason is that the hill-climber can get tripped up by an individual case, whereas on a problem that is GA-easy but not SAO, the GA is carried over such cases by the statistic...

Subjecting a muscle to a series of eccentric contractions in which the contracting muscle is lengthened results in a number of changes in its mechanical properties. These include a fall in isometric tension that is particularly pronounced during low-frequency stimulation, a phenomenon known as low-frequency depression (LFD). Reports of LFD have not taken into account the shift in optimum length...

Mahu Oilfield, the largest conglomerate oilfield around world, is facing severe problems of rapid production decline and low recovery ratio. Re-fracturing horizontal wells an effective method to improve this situation. The study well re-fracturing has increased popularity recently, but optimization parameters not been thoroughly investigated, especially for reservoir. optimal selection such as ...

BACKGROUND The discovery of microRNA (miRNA) has revealed a novel type of regulatory control for gene expression. Increasing evidence suggests that miRNA regulates chondrocyte, osteoblast, and osteoclast differentiation and function, indicating miRNA as key regulators of bone formation, resorption, remodeling, and repair. We hypothesized that the functions of certain miRNAs and changes to their...