Traffic Congestion Assessment Based on Speed Index Performance on Arterial Streets in the Commercial Center of Latakia

The high traffic density causes traffic congestion on the road, causing delays before it reaches its destination, in addition to the stress and high psychological impact on the driver, it also results in staff and staff being late for work and students being late for school, With frequent accidents on these busy roads. Congestion has a lot of reasons, one of them is poor infrastructure that leads to a state of congestion, a significant increase in the number of vehicles, a lack of prior information for road users about the traffic situation, Division of traffic management into several departments (Public works, municipality, security, transport…). They become ineffective in some areas, aggressive driving style Which may be an effective factor in creating congestion, in addition to the use of individual transport rather than mass transport. Latakia suffers from a very poor transport system, and the indiscriminate movement of vehicles on its streets. This has been accompanied by increased traffic, which has led to many problems. The most important is the problem of congestion, in terms of increasing the values of delay times in different road sectors. This has contributed to major traffic crises and congestion. It affected service levels on arterial streets in the city's downtown, in the absence of rush-hour studies. Two main streets have been selected in the commercial and downtown center of Latakia City, which is an important arterial street for the distribution of movement. These arterial streets connect the commercial and administrative center of the city with the other parties of the city. The moving controller analyses a large number of actual speeds of the vehicle, measured in each sector, with a view to estimating congestion, calculating its indicators, and determining peak hours. Congestion levels were inferred based on the values of the speed performance index, and the average speeds of daytime and evening peak hours have been mapped to considered street sectors.

Control of a Variable Speed wind Energy System for Maximum Power Using Genetic Algorithm

This paper presents a strategy of variable speed wind turbine connected to a permanent magnet synchronous generator; the goal is to get the most possible wind turbines. We used a wind energy conversion system model consisting of a wind turbine, permanent magnet synchronous generator, rectifier, buck-boost chopper, inverter, load, and traditional controller PI to stabilize the voltage obtained from the wind turbine and synchronous generator at a variable wind speed. Then we used one of the artificial intelligence techniques represented by the genetic algorithm to get the maximum possible wind turbine. The traditional controller PI and the genetic algorithm we modeled using the Matlab R2014a program and from it we obtained the advantages of mechanical power for wind turbine and determined maximum power points at each wind speed.

Enhancement Performance and Stability of Variable Speed Drive Systems with 12-Pulse Rectifier in Modern Industrial Facilities

This paper suggests improving the quality and performance of electrical grid by using Four Chopper circuit in the DC –Link of the variable speed drive system with 12 pulse rectifier. In addition, it analyses the effects on the ripple factor for both current and voltage in DClink and improving the system's stability. For this study a variable speed drive system has been simulated and designed with the proposed chopper and 12 pulse rectifiers. In order to confirm the ability of Using four - quadrant chopper with rectifier circuits and its ability to improve the stability of the power systems, a variable speed system has been simulated Finally, A discussion of the results was introduced. The giving results show the advantages of using the proposed chopper with variable speed drive systems.

Mobility Management solutions within dense wireless networks resulting in extremely fast handover

في هذه الأطروحة قمنا بدراسة أحد جوانب البحث في الشبكات اللاسلكية الكثيفة و هي إدارة الحركية، و ركزنا على أساليب و طرق إدارة الحركية الموزعة و التي تعتمد على بروتوكولات إدارة الحركية المعيارية MIPv6 و PMIPv6 ، درسنا هذه الطرق مع ذكر إيجابيات و سلبيات كل منها و مقارنتها، ثم قمنا باقتراح خوارزمية جديدة لإدارة الحركية الموزعة بشكل كامل و التي تعتمد على بروتوكول PMIPv6 حيث يكون فيها مستوي البيانات و مستوي التحكم منفصلين و موزعين، و يتم تطبيقها في الشبكات اللاسلكية ذات البنية المسطحة الغير هرمية.

Improving the strength that is distinct by speed, and bearing the strength for arms, and acting the straight punch using weights training for novice boxers

The specialists boxing training have interested in physical, rhythmics skills and functional aspects.one of the most important concerns are those associated to technical performance level (skill in particular). Especially with regard to the ways and methods of developing the physical attributes specific elements, and determining the level in this game, which in turn qualifying the boxer to act mobility and tactical skills of boxing and having successful performance on the ring (the art of the ring). These methods depend on the full benefit of physical attributes. The research aims to determine the effect of weight training in the Improving the strength that is distinct by speed, and bearing the strength for arms for novice boxers. After conducting tests and completing them totally, results are collected, processed statistically, presented, and discussed in a scientific manner; in order to achieve the goal of the search. At the end of the research we have reached a clear difference between the normal and experimental groups; experimental groups were better.

determine the Drag Coefficient due to flow around square plates with central circular hole experimentally

This Study presents results of experiments on smooth, thin square plates with different central holes diameters to measure the drag coefficient of flow through the plates. The experiments were performed in a subsonic open wind tunnel at the hydraulic laboratory, Faculty of Civil Engineering, University of Damascus.

A half-numeric method for Calculation the volume resulting from the intersection of a cylinder with a ball as a function of the impact parameter by using the Mathematical program mathCAD

We have developed an analytic expression for the volume of intersection of any cylinder with any sphere in the usual threedimensional space, and give examples of its usefulness for physics. Produced from surface collisions either elastic collision, or inelastic collision, for the incoming energies greater than the binding energy of the nucleons in the nucleus, the reaction occurs and thus the effective size (what the target nucleus see from the nuclear material in the projectle, and What the projectle see from the nuclear material in the target nucleus) is formed and so for the different collisions parameters .

Development electrical drive Vector control system for three phase induction motor Crane Wire, according to the principle indirect rotor field orientation

In this paper, the development of the drive system of the motor Wire port Crane according to the principle of the indirect field orientation. Require the operation of the port Crane operations, different operation situations of variable speed and Torque with time, which is a case dynamic electro and electro-magnetic transient, may affect the performance of operations, so therefore been building motor Wire port Crane operations system corps in winches achieve: - High performance and Efficiency. - Build the desired control system according to the principle of the Pulse Width Modulation (PWM) and the main power system, taking into account the reduction of changes DC-Link voltage and achieve maximum flux before starting the motor. - Reduction of excess Voltage that may appear on a DC-Link, using the brake Transistor with Brake resisters. At the end of the research has been reviewed and the search results that indicate the outstanding performance of the proposed system with the ability to use the same system to run automated processes different.

Computer modeling of reducers gearboxes for large axes vehicles and analysis with the help of finite element

The use of modern methodologies and techniques a new approach to evaluate the process of engineering design in the industry pay to use in evaluating the speed in large cans mechanisms design. The gearbox that is designed for big vehicles for off-road driving conditions need portal axle which installed between the wheel and the axle shaft to give higher ground clearance to the vehicle. The modeling and simulation of spur gear which contacted with portal axle is important to predict the actual motion behavior, but it's so complicated to study. In this study, it'll analysis the portal axle by using finite element method (FEM), modal analysis will simulated on three different combinations of gear train system, the three gear trains being analyzed are: gear train without idler gear, one idler gear and two idler gears. FEM static stress analysis will also simulated on three different gear train to study the gear teeth bending stress and contact stress behavior of the gear trains in different angular positions from °0 to °18 degree.

Perceptual Speed and its relationship to problem-solving

Students in most schools face the problems and challenges of diverse influence the curriculum student success in adaptation and its compatibility with the school in general, these problems are varied as predominantly some mental character, such as appropriate between capacity and preparations on the one hand, and between the requirements of the study, on the other hand, some of which arise as a result of a lack of information that the student needs it and a lot McCann doubled in the public mental capacity and the ability to focus disorder cause of the important reasons influencing academic achievement. Due to the fact that perception plays a vital role in the process of solving problems as a primary entrance and the process leading up to the thought process comes after the process of attention and access to the right solution. Solving problems requires awareness of this problem and understand the requirements to find a solution quickly. If the problem-solving process that requires a set of independent operations have these three characteristics, "the speed, precision, perseverance," the perception is responsible for briefing with data problem and the solution with the participation of other important functions, such as attention and memory types, levels, it will be logical and natural that varies individuals in the rate of time you need these operations, as well as in the period Satfawton Imkthonha in the performance of these tasks (zest and others 1990.16)Studies and research conducted on the problem-solving attention of researchers in most parts of the world, but in specific areas of specialized physical geography, math science curriculum has indicated, but there are few attempts to use problem-solving in the field of humanities skills by science researcher such as studying the effectiveness of a program to develop thinking skills associated with resolving the problems Mansour (2004), Syria and study the ability to solve problems and skills beyond the knowledge of the ordinary and talented Justice Abdul Wahab (2003) and the study of the elationship between the estimate and solving personal problems and some emotional disorders to Fayed (2001), but the relationship between the speed of cognitive problem solving did not receive the study and attention by Most specialists in the field of cognitive psychology while important studies in this small area, especially in adolescence, which is one of the important stages throughout the human throughout his life to see their ability to solve the problems they face and speed in solving stage, it is noticeable that the students have weak solution problems they face in their daily lives Kalmchklat school with regard to speed, precision and perseverance to follow or social problems. Based on the above, the current research is an attempt to study the relationship between the speed of cognitive and problem-solving among a sample of second grade general secondary students in the province of Damascus. It can identify the main problem of the research question follows: What is the relationship between the speed of cognitive and problem-solving among a sample of second grade students of secondary branches of literary and scientific in the province of Damascus?