this paper deals with a failure investigation of boiler feed pump’s shaft of a steam power plant. boiler feed water pump is a specific type of pump used to pump, feed water into a steam boiler and is one of most important part of steam power plants. feed pumps failure may cause failure of another part of steam power station, therefore keep them safe is an important problem. there are 12 feed pu...

certain benefits are clearly associated with the use of off-pump coronary artery bypass grafting (cabg) as compared with the on-pump cabg. the superiority is more evident in patients with multiple co morbidities including renal failure.we reviewed the medical records of a 67-year-old male with a past medical history that was significant for multiple cardiovascular diseases and new-onset end-sta...

Certain benefits are clearly associated with the use of off-pump coronary artery bypass grafting (CABG) as compared with the on-pump CABG. The superiority is more evident in patients with multiple co morbidities including renal failure.We reviewed the medical records of a 67-year-old male with a past medical history that was significant for multiple cardiovascular diseases and new-onset end-sta...

In this study, a three-dimensional CFD transient model is established for predicting species concentration distribution in the biodegradation of phenol an airlift reactor (ALR). The gas–liquid flow ALR determined by Euler–Euler method coupled with standard k-? model, and bubble size predicted population balance (PBM). A turbulent mass diffusivity developed to simulate transfer process predict d...

An internally illuminated photobioreactor (IIPBR) design is proposed for energy-efficient biomass production. Theoretical rationale of the IIPBR design and its advantages over the traditional bubble column photobioreactors (PBRs) are presented, followed by experimental results from prototype scale cultivation of freshwater and marine algal strains in an 18L IIPBR. Based on theoretical considera...

1. Rapid deployment and employment. In addition to maintaining a modestly sized but potent force in the theater on a routine basis, the United States requires assets to ensure that forces essential to the halt campaign can arrive in the theater within days and conduct high tempo operations. Strategic airlift constitutes the backbone of this early deployment capability. It should be supplemented...

The application of microalgae for energy purposes and CO2 biomitigation continues to present a number of challenges, including the optimization of culture conditions. The application of experimental designs for microalgae cultivation is difficult, since experiments involving such microorganisms generally last days or weeks. This work proposes a multipurpose laboratory apparatus for the optimiza...

using a new numerical model, the pump-to-signal relative intensity noise (rin) transfer in singlepumpfiber optical parametric amplifiers for low modulation frequencies is investigated. the model includesfiber loss, pump depletion, as well as the gain saturation, and therefore, it can describe the practicalcircumstances associated with various applications of fiber optical parametric amplifiers....

the effects of fish weight on salinity tolerance were studied in caspian salmon (salmo trutta caspius) parr. 180 fish (all with 2 years old but with three weights; 5, 15, 25g) were selected and they reared in freshwater (fw) and brackish water (bw; 13ppt salinity) for 10 days. the mrna expression of two α-subunit isoforms of na+, k+-atpase (α1a and α1b) and nkcc co-transporters were studied in ...