Design parameters such as initial bonding section, prestress, and stiffness have a significant impact on the mechanical properties of full-length bonded prestressed bolt. In order to understand influence above three axial force shear stress anchor bolts under condition rock separation, theoretical numerical models were established, sensitivity different was analyzed based grey correlation metho...

polyvinylidene fluoride/polyvinylpyrrolidone (pvdf/pvp) hollow fiber membranes were fabricated by dry-jet wet-spinning process. the correlated effects of the air gap length and pvp concentration ((1) the air gap length effect at the low and high pvp concentration in the dope solutions, as well as (2) the effect of the pvp concentration at the same air gap length) on the cross-section structure ...

the gas separation performance of commercial ceramic titania and hybrid silica (hybsi®) membranes was assessed using the gas permeation and permporometry methods. results indicated that the hybsi® membranes have a hybrid surface containing regions covered by a polymeric matrix and others with inorganic pores. these membranes have high h2 selectivity, which increases significantly with temperatu...

Tests of a two-dimensional straight wing with a 10 per cent thick RAE 101 section have been made in a low-speed wind tunnel to check the validity of a criterion suggested by Owen and Klanfer for the type of bubble which will be formed when a laminar boundary layer separates from the surface of an aerofoil. The results confirm this hypothesis and show that if the boundary-layer Reynolds number b...

We present a model of weak scale dark matter (DM) where the thermal DM density is set by the lepton asymmetry due to the presence of higher dimension lepton violating operators. In these models there is generically a separation between the annihilation cross section responsible for the relic abundance (through lepton violating operators) and the annihilation cross section that is relevant for t...

BACKGROUND With a recent increase in running popularity, more women choose to run during and after pregnancy. Little research has examined exercise behaviors and postpartum health conditions of runners. HYPOTHESIS Antenatal and postpartum exercise is beneficial in reducing certain postpartum health conditions. STUDY DESIGN Cross-sectional study. LEVEL OF EVIDENCE Level 5. METHODS A self...

In this article we explicitly construct Stäckel separable systems in separation coordinates with the help of separation curve as introduced by Sklyanin. Further, we construct explicit transformation bewteen separable and ‡at coordinates for ‡at Stäckel systems. We also exploit the geometric structre of these systems in the obtained ‡at coordinates. These coordinates generalize the well known ge...

We show that long-run average cost function for the (R, T) policy with normally distributed demand has a structure similar to that of the corresponding (Q, r) model so that many of the useful properties of the latter model are applicable. In particular, (i) the optimal cost is relatively insensitive to the choice of the reorder interval, T, provided a near-optimal R corresponding to the chosen ...

In this paper we study the properties of the Jeffrey’s inverse prior for blind separation of sparse sources. This very sparse prior was previously used for Wavelet-based image denoising. In this paper we consider separation of 3×3 and 2×3 noisy mixtures of audio signals, decomposed on a MDCT basis. The hierarchical formulation of the inverse prior allows for EM-based computation of MAP estimate...

In children, fracture-separation of the epiphyseal plate near the elbow joint is a common occurrence. However, separation of the distal humeral epiphysis is very rare, especially in the newborn. There have been very few reports of this rare injury since 1926. When it occurs in the newborn, it may be difficult to diagnose and is easily mistaken for a dislocation of the elbow. Caesarean deliverie...