Increasing the combustion temperatures in a gas turbine engine to achieve higher efficiency and power output also results in high heat loads to turbine components downstream of the combustor. The challenge of adequately cooling the nozzle guide vane directly downstream of the combustor is compounded by a complex vortical secondary flow at the junction of the endwall and the airfoil. This flow t...

BACKGROUND Bone cement leakage during vertebroplasty is a frequently reported complication with the potential for neural injury. OBJECTIVE To assess risk factors for epidural cement leakage during vertebroplasty. SETTING Neurosurgical department of a scientific research institute. STUDY DESIGN This is a prospective cross-sectional randomized trial. METHODS Seventy-five patients with int...

Monju is Japan's prototype fast breeder reactor :280 MWe (714MWt), fueled with mixed oxides of plutonium and uranium, cooled by liquid sodium. Construction was started in 1985 and initial criticality was attained in April 1994 On 8th December 1995, sodium leakage from a secondary circuit occurred in a piping room of the reactor auxiliary building. The secondary sodium leaked through a temperatu...

In high-pressure turbines, there is a large difference in temperature between the mainstream and turbine blade surface. Most of tip heat transfer studies were conducted under assumption that Over-Tip-Leakage (OTL) flow field independent wall thermal condition. Recent numerical experimental have revealed two-way coupling effect aerodynamics should not be neglected. The coefficient obtained by co...

In a compressor, the periodic wake is an inherently unsteady phenomenon that affects downstream flow conditions and loading distribution. Thus, understanding physical mechanisms of these effects important for eliminating losses improving compressor performance, particularly at low Reynolds numbers. To understand influence upstream on field structure, this paper describes numerical simulations o...

The use of magnetic fields in targeted drug delivery, especially for treatment of cancers and tumoral regions, is one of the significant techniques in the field of modern methods of treatment. Considering that many vital biological tissues have been located deep in the body, then for targeted drug delivery and effective treatment in these tissues, it is required to bring therapeutic agent to th...

extended abstract abstract pressure management is an effective method for water demand management. for evaluation of the effects of pressure changes on leakage level of water networks, the favad equation is usually used. however, in this equation, exponent of pressure parameter (n) needs to be determined. for estimation of n, either some information about the leak opening is necessary or networ...

OBJECTIVE This study investigates the effects of Nd:YAG laser irradiation combined with different irrigation protocols on the marginal seal of root fillings. BACKGROUND DATA Limited information exists regarding the effects of morphologic changes to root canal (RC) walls after Nd:YAG laser irradiation after smear-layer removal with EDTA on the sealing ability of root fillings. METHODS The 75...