EXPERIMENTAL STUDY OF THE BEHAVIOUR OF SMALL WIND TURBINE DURING THE STARTING PERIOD

This research shows that the design of wind turbine blade for the best production of energy produces a turbine with a problem of start-up. The study focused on ways to improve the process of the small wind turbine start-up at the low wind speed with the stability of the pitch blade angle, and study the behavior of the turbine during the stage of angular acceleration after the start-up until the turbine reaches the speed of rotation that enable it to produce the energy.

Determinants of Velocity of Money in Syria An Econometric Study (1990-2010)

This study aims to identify the factors affecting the velocity of money in Syria during the period ( 1990-2010) based on the study and review of the monetary theories, and the analysis of some empirical studies that examined the velocity of money and its relation to macroeconomic variables. In addition to an econometric study focused on the relationship between the velocity of money in its narrow sense (M1) with the rate of inflation, per capita GDP, real exchange rate, financial evolution, interest rate and political instability, using ARDL methodology to test joint integration.

أثر تعيين و استقالة المدراء و الرؤساء التنفيذيين في عوائد الأسهم (دراسة تطبيقية على الشركات المدرجة في سوق دمشق للأوراق المالية)

Applied study was conducted to look at the banks and the insurance sector and other sectors in Damascus security market ، which has made the event for a period specified in the period before and after the event and using statistical test.

Improving the performance of pv pumping station from rivers using TRNSYS program

We offer in this research, theory study using a modeling tool for the possibility of improving the performance of solar pumping system of rivers using submersible centrifugal pump with variable speed and moving solar panels controlled by logical microcontroller programmer (plc.).

Studying of Possibilities for Performing a Diagnostics’ Model (Instruction phase) of Marine Engines’ Vibrations Onboard Ships

In this study, we have developed a mathematical model, which formed the basis for the development of a digital diagnostic model, for the question of the relation between the engine torque (and therefore power), and the clearances in the basic and secondary bearings of the crankshaft, to diagnose clearance values in these bearings, /which will inevitably affect on the torque and the vibrations of the engine/, where multiple and various grand-scale case experiments were carried out through simulation and arithmetic experimentation on a diagnostic model, which constituted the first and main phase (the instruction phase) of the full diagnosis. And at the end we discussed the results and put some conclusions and recommendations to complete the work in the future.

Erath gravitational field in Syria

The Earth's gravity field is related to the Earth's mass and shape and to the position, where we apply the measurement.The measured value in any place depends on the altitude of the place angle and Earth's rotation speed around itself. In the paper we present a theoretical idea connecting the value of gravity with the above mentioned amounts. Next we calculated the value of this field in some Syrian cities. The paper is ended by important note, that the obtained relations allowing to calculate the value of the gravity field depends on the place altitude, not on the one's Longitude.

The Role of the Insurance Sector in the Revitalization of Investment and its Impact on the Performance of the Damascus Securities Exchange. "An Empirical Study on the Insurance Companies Listed in the Damascus Securities Exchange."

The study addressed the investments of insurance companies listed market Damascus Securities Exchange, and its impact on the performance of the market to know how much they contribute to the improvement of Damascus Securities Exchange performance through the study of the relationship between the size of the investment represented by turnover of the shares of insurance companies listed in Damascus Securities Exchange and Index Damascus Securities Exchange, During the period 1-1-2010 until 31- 12-2014 in order to improve and raise the level of the insurance sector as an important investment sectors in the national economy.

cranial base and its relation with jaws rotation in adult(CBCT scan study)

Facial structures, as well as their functions and correlations, have been extensively studied to expand the knowledge of craniofacial growth and development and to optimize growth predictions and proper indications of orthodontic and surgical treatments. The cranial base forms the boundaries of the craniofacial complex . The nasomaxillary complex is related to the anterior cranial base, whereas the mandible is related to its posterior portion. Therefore, the shape of the cranial base is an important factor in establishing the position of the maxilla and mandible. Aim: to investigate the relationship of cranial base with jaws rotation in adult orthodontically non-treated subjects using Cone- Beam Computed Tomography (CBCT) scan. Materials and methods: 27 Caucasian adult patients with no prior orthodontics treatment were selected (16 males, 11 females) .Cephalometric measurements determining type of jaw rotation were performed according to Björk's analysis. Pearson's Correlation Coefficient was calculated to investigate the relationship between the CBCT cranial base measurements and Cephalometric measurements determining type of jaw rotation . Results: This study reveal vary correlation between CBCT measurements of cranial base's dimensions and jaws rotation. Conclusions: There is no relationship between the cranial base morphology and Jaws rotation in adult orthodontically non-treated subjects.

Simulation experimental results in Studying of analysis and design of beam column connection in the precast concrete framed structures

Our subject contains studying criterions which ensuring a durable serving of concrete frame joints, and then choosing two connections according to its deployment and the availability of its arithmetic relations and easy to be prepared from local materials, and discuss experimental results of the resent study which allow us to achieve the next part of our research,which is a structural designing programme by visual basic language to serve the work in order to be fast and precise. the last part of the subject is comprising a number of actualizations which confirm that the process of programming is correct, and then compare the results of experimental programs and code with our programme results to achieve many important ameliorations on this programme to become more easily and better.

The Impact of the Labor turnovers rate on the tourism service quality " A Survey Study on the Tourist institutions at Syrian Coast "

The study aimed to investigate labor turnover rate effect on tourism service quality, by determining labor turnover rate effect on service quality dimensions (reliability, sympathy). The study conducted on sample of managers ,labor and hotel customers in in the Syrian Coast. The study results show that labor turnover rate affects tourism service quality. Whereas there is a relationship between labor turnover rate and service quality. and that there is an acceptable relationship between reliability and the labor turnover rate and a weak relationship between sympathy and the labor turnover rate.