In this study multi objective optimization is utilized to optimize a turning operation to reveal the appropriate level of process features. The goal of this work is to evaluate the optimal combination of cutting parameters like feed, spindle speed, inclination angle and workpiece material to have a best surface quality Taguchi technique L9 mixed orthogonal array, has been adopted to optimize the roughness of surface. Three rods of length around (200 mm) for the three metals are used for this work. Each rod is divided into three parts with 50 mm length. For brass the optimum parametric mix for minimum Ra is A1, B1 and C3, i.e., at tool inclination angle (5), feedrate of 0.01, spindle speed of 120

                The electrical characteristics of polyvinyl alcohol PVA doped with different concentrations (0, 1, 2, 3 and 4wt%) of sodium  iodide NaI powder were studied. The films are prepared using solution casting technique, in order to investigate the effect of sodium iodide NaI additions on the electrical properties of PVA host. The D.C conductivity measured by measuring the D.C electrical resistance using the Keithly Electrometer type 616C, and for different temperatures ranging from 30 – 70^oC.

          The dielectric properties measured by measuring the capacitor and the loss

Multi-point forming (MPF) is an advanced flexible manufacture technology, and the technology results from the idea that the whole die is separated into small punches that can be adjusted height. This idea is applied to the traditional rigid blank-holder, so flexible blank-holder (FBH) idea can be obtained. In this work, the performance of a multi-point die is investigated with pins in square matrix and suitable blank holder. Each pin in the punch holder can be a significant moved according to the die high and at different load that applied with spring with respect to spring stiffness. The results shows the reduction in setting time with respect to traditional single point incremental forming process that lead to (90%). and also show duri

Background: Acute exercise stress is associated with a lower lymphocyte functional response. It is suggested that exercise can enhance or reduce immunity depending on the frequency, duration, and intensity of the exercise.
Subjects and Methods: From November 2007 to January 2008, thirty healthy Volunteers were recruited from medical, paramedical staffs, and students of Baghdad College of Medicine (all males). Participants were chosen according to the following: (1)Age (between 20 and 35 years), (2) Non obese : Body mass index (BMI in kg/m2) was used as an index of obesity, (3) Non-smoker, (4) No recent medical problem, (5) No recent medications, and (6) No musculoskeletal complaint. After a general m

Freedom of opinion and expression occupy the first place among the concerns of countries and international organizations. And it is also the basis of contemporary freedom because it is the foundation for achieving freedom in other fields such as politics, economics, education, etc.. The constitutions of the state have ensured that almost the entire freedom to express an opinion in all its forms either orally or writing or images of expressions, but these freedoms are identified within the law. Most countries announced their commitment to the international conventions and texts issued by international and regional organization like the Universal Declaration of Human Rights in 1948, and the International Covenant on Civil and Political Rig

Background: Rheumatoid Arthritis (RA) is an autoimmune disease. Many etiological agents are proposed to play a role in its pathogenecity. One of these factors is cytokines such as Interleukin6.
Material & Methods: ELISA method has been used for IL-6 estimation in 75 RA patients in comparison with 61 SLE as patient controls and 39 apparently healthy controls.
Results: This study showed that there was an elevation of IL-6 in the sera of RA patients with high significant differences between RA patients and controls (P< 0.001). Moreover a good correlation between IL-6 level & RF titer were observed. However, for most patients with high IL-6 were shown to be HLA-DR4.
Conclusions: Interleukin-6 play

In this work, a step-index fiber with core index  and cladding index  has been designed. Single-mode operation can be obtained by using a fiber with core diameters 4–13 µm operating at a wavelength of 1.31 µm and by 4–15 µm at 1.55 µm. The fundamental fiber mode properties such as phase constant, effective refractive index, mode radius, effective mode area and the power in the core were calculated. Distributions of the intensity and the amplitude were shown.

In this paper, the author established some new integral conditions for the oscillation of all solutions of nonlinear first order neutral delay differential equations. Examples are inserted to illustrate the results.

This paper is concerned with the oscillation of all solutions of the n-th order delay differential equation . The necessary and sufficient conditions for oscillatory solutions are obtained and other conditions for nonoscillatory solution to converge to zero are established.