About 20% of the electricity produced in the world is consumed in rotary equipment for conveying fluids such as water, gas, air, and other liquids, while the loss of energy consumption in this sector is more than 60%. The aim of this study is to evaluate different efficiencies in the pumping stations in the pressurized irrigation systems to address low energy efficiency issues in the pump stati...

The design of a gas-driven downhole pumping unit for oil production from directional and horizontal wells has been developed. no rod string, the slide pneumatic jack are located in tubing string. Using these units with compressed associated gas as working fluid will allow, unlike hydraulic pumps, avoiding complex surface equipment preparing fluid, maintenance which is rather labour-consuming, i...

For pump installation most experts recommend installing conventional metallic baseplates on concrete foundations and securing them to the foundation with a combination of anchor bolts and epoxy grout. Many papers have been written on the techniques required to obtain a good quality installation free of voids and properly bonded to the concrete and baseplate itself so as to give a long trouble-f...

Introduction: Coronary artery disease (CAD) is the most common type of heart disease, with a mortality rate of 385,000 person per year in the United States. There are two main methods for CAD treatments: angioplasty and bypass surgery. Coronary Artery Bypass Grafting (CABG) is one of the greatest surgical operations of the 20th century and it is presented as most effective and long-term therapi...

The problem of detecting sources of infrared radiation affects a large proportion of security alarm and distress signal systems. In a time of increasing property crime, it is highly important for passive infrared detectors (PIR) to be able to detect motion within the guarded area reliably and free of error. In the case of installation of passive infrared detectors (PIR) it is naturally importan...

Earnings Median annual earnings, including commission, of home appliance repairers were $28,860 in 2000. The middle 50 percent earned between $21,840 and $38,040 a year. The lowest 10 percent earned less than $17,300, and the highest 10 percent earned more than $45,750 a year. Median annual earnings in the two industries employing the largest numbers of home appliance repairers in 2000 were $27...

Qualification of employees who operate technological processes directly influences the safety of production. However, the employees’’ qualification cannot completely exclude human factor. Today, there are many technologies that can minimize or eliminate human factor impact on production safety ensuring. The augmented reality technology is an example of this technology. Nowadays, the augmented r...

background: it is well documented that coronary artery bypass grafting (cabg) with cardiopulmonary bypass (cpb) causes ischemia and oxidative stress of the whole body. to compare the effect of on – pump and off –pump cabg on the induction of the oxidative stress and the metabolism of homocysteine which is involved in the synthesis of glutathione was investigated in the cabg patients during the ...