This paper investigate a sensorless speed control of a separately excited dc motor fed from a buck type dc-dc converter. The control system is designed in digital technique by using a two dimension look-up table. The performance of the drive system was evaluated by digital simulation using Simulink toolbox of Matlab.

Background: Coronary artery bypass graft is routinely performed on an arrested heart using cardiopulmonary bypass with aortic cross clamping and Cardioplegia. Off-pump coronary artery bypass graft (OPCABG) is being increasingly used in selected cases as an attempt to decrease morbidity and mortality.
Objective: The main objective of this study is to clarify those patients who are indicated for OPCABG despite it is surgically demanding technique and to evaluate the mortality and morbidity associated with such procedures.
Patients and methods: It is a retrospective study of 28 patients with coronary artery disease, in need for coronary artery bypass graft admitted and surgically treated at the Iraqi Centre fo

The increasing use of polymeric materials in the daily life, leads to challenges in the processing industry to deliver high performance materials with affordable terms. However, new processing techniques lead to high costs. In order to reduce processing costs it is necessary to understand the non-Newtonian behavior of the polymers in their molten state to be able to simulate the processes before the construction of the plants starts. Here the shear thinning behavior of the viscosity of polymeric melts is essential. Thus, this paper deals with the experimental investigation of the thermo-rheological behavior of the viscosity of one of the most used polymers (Polypropylene) over a wide range of temperatures and shear rates.  Furthermo

Considering that migration is moving to live from one place to another, with an intention in the place that was intended for a long time, due to the frequent movement of individuals from one place to another, and due to the different purpose of migration, we find external migration classified into legalized and irregular migration, and the reasons The growth of illegal immigration is due to economic,  social, and psychological motives, and therefore we find that it has multiple effects, both on the country hosting immigrants in terms of economic, security, social and health terms, or on the level of organizing international relations between countries, so countries sought to mitigate this phenomenon and deal with immigrants As stipu

     In this study,  has been discussed the issue of non-interest income and its impact on the Iraqi banking sector profit for the period between (2008-2017) as it was the main objective of the study is to find the relationship between the non-interest income and the profits of the banking sector in order to know  the size of the sector's dependence on non-interest income As well as an analysis of its profitability compared to selected countries, And to test hypotheses, the financial ratios and some statistical tests to determine the stability of the time series such as the test (Correlegram , Dickey -Fuller (depending on the statistical program (E-Views V8) and a simple linear regression method by (Minitab

The aim of this study was to investigate the effectiveness of binary solvent for regeneration of spent lubricating oil by extraction-flocculation process. The regeneration was investigated by bench scale experiments by using locally provided solvents (Heavy Naphtha, n-Butanol, and iso-Butanol). Solvents to used oil, mixing time, mixing speed and temperatures were studied as operating parameters. The performance on three estimated depended key parameters, namely the percentage of base oil recovered (Yield), percent of oil loss (POL), and the percent of sludge removal (PSR) were used to evaluate the efficiency of the employed binary solvent on extraction process. The best solvent to solvent ratio for binary system were 30:70 for Heavy Naph