Multi-phase state estimation featuring industrial-grade distribution network models

This paper proposes a novel implementation of a multi-phase distribution network state estimator which employs industrial-grade modeling of power components and measurements. Unlike the classical voltage-based and current-based state estimators, this paper presents the implementation details of a constrained weighted least squares state calculation method that includes standard three-phase state estimation capabilities in addition to practical modeling requirements from the industry; these requirements comprise multi-phase line configurations, unsymmetrical and incomplete transformer connections, power measurements on 4-connected loads, cumulative-type power measurements, line-to-line voltage magnitude measurements, and reversible line drop compensators. The enhanced modeling equips the estimator with capabilities that make it superior to a recently presented state-of-the-art distribution network load estimator that is currently used in real-life distribution management systems; comparative performance results demonstrate the advantage of the proposed estimator under practical measurement schemes

The Lost Equations in (Classical and relativity) for Accelerated Motion at Very High Speed (Jabr's Equations)

since more than three centuries ago the classical theory Created equations of accelerated motion, then the theory of relativity came and explained that the classical theory gives erroneous results at very high speeds, But also the special relativity there are no equations of accelerated motion at high speeds too, The equations of this movement remains missing to this days, Today we are finding these equations according to the study previously submitted (II Bulletin) by IISTE. Keywords: Jabr's equations of accelerated motio

Problems Immigrants Face In Host Countries

This study aimed to investigate the problems immigrants face in their host countries when dealing with native inhabitants, and to understand the effect of gender, age, and educational level on these problems.  The sample for the study consisted of 150 immigrants working in Saudi Arabia. Means, standard deviations, and t-tests were used to analyze the results.  The results showed that there are statistically significant differences in the problems that immigrants working in Saudi Arabia face. They also showed that there are statistically significant differences at (a= 0.05) in the problems immigrants face owing to the gender variable, and statistically significant differences at (a= 0.05) in the problems immigrants face owing to age and educational level

Flexural Strengthening of RC beams using Fiber Reinforced Cementitious Matrix, FRCM

The use of externally bonded Fiber reinforced polymer (FRP) sheets has been successfully used in the repair and strengthening of both the shear and flexural capacities of reinforced concrete (RC) beams, slabs and columns since the 90\u27s. However, the externally bonded FRP reinforcements still presents many disadvantages, such as poor performance in elevated temperature and fire resistance, lack of permeability, and strength degradation when exposed to ultraviolet radiation. To remedy such drawbacks, fiber/Fabric Reinforced Cementitious Matrix (FRCM) has been recently introduced. The FRCM system consists of fiber mesh or grid embedded in a cementitious bonding material. The present research investigates the flexure strengthening of reinforced concrete (RC) beams with FRCM. The experimental testing included sixteen large scale concrete beams, 150 mm x 250 mm x 2400 mm, internally reinforced with steel bars, and strengthened in flexure with FRCM. The investigated parameters were the effect of axial stiffness, internal steel reinforcement, and the concrete strength. Two steel reinforcement ratios of 0.18 and 0.36 of the balanced reinforcement ratio as well as three FRCM systems using, Glass, Carbon and PBO (Polyparaphenylene benzobisoxazole) fibers were investigated. Test results are presented in terms of load-deflection, load- strain and load-crack width relationships. The test results indicated that the PBO-FRCM significantly increased the ultimate capacity of the strengthened RC beams compared to the glass and carbon FRCM

Find Transformations (Lorenz's and Einstein) of the Accelerating Motion (Jabr's Transformations)

Mickelson held in 1887 and Morley experiment to determine the speed of the earth for the supposed ether, But the classical theory failed to explain this experiment, After the effort was able to interpret the experience, that is design equations  called the Lorenz's transformations, But rejected at the time because it did not conclude mathematically, Then Einstein in 1905 came And was able to interpret the experience as his theory of special relativity that depend entirely on the uniform rectilinear motion ,then Einstein put his transformations. But now we can find these transformations depending on the accelerated motion (Jabr's transformations)! Keyword: Jabr's Transformation

New Law to Calculate Speed of (Electron and Proton) in Electrical Field

The classical electrodynamics and special relativity theory of Einstein can calculate the speed of the electron or the proton, But each of it a range in the application. and a new single Law to calculate the speed has been discovered, this law is very easy

Find the second static equation of energy and find the largest forces of nature at all and find smallest particles in the universe (Al-Jabrton)

Einstein the kinetic energy in static case discovered through his theory of special relativity, it was expressed about contain of the material of energy this equation is very important in physics, But today we discover the second static equation of energy It is the potential energy or the internal energy of the Fundamental particles  and the quantity of energy equal the quantity of static kinetic energy to Einstein , But this equation is very important  because it know us at the internal structure , The basic of the material and it is characteristics , such as New forces undiscovered in nature so far and the dimensions of the particles and smaller particles in nature., The previous three bulletins were the entrance to a new physical theory is (recovery Theory of energy) Which we can derive them previous theories such as: Newton's principles - the theory of relativity to Einstein - quantum theory of Max Planck - hypotheses Bohr - Mechanics waveform of Louis de Broglie in addition to other new theories were not known before today. Keywords: second static equation of energy, largest forces of nature at all, smallest particles in the universe, (Al-Jabrton) ,recovery theory of energy