Analytical study of urban networks at the level of spatial development “Greater Damascus Region as case study”

With increased attention to regional and spatial planning in the world and the need to pay attention to modern spatial development methods, increased thinking for necessity urban networks as a mechanism for achieving spatial development in small and medium-sized cities, operating alone, has been enhanced by changing the spatial structure of the Territory, raising qualitative and quantitative use, To collect the assets and resources of the cities of the Region that accept participation in potential opportunities and risks. The analytical study was implemented by proposing an urban network in the Greater Damascus Region that examines the nodes and links, and uses the SWOT system to examine opportunities and possibilities, its relationship to the problems and determinants of selecting the best scenario for the proposed urban network examines the effect of applying the urban network concept on changing the spatial structure of the Greater Damascus Region, and propose a workable mechanism at the spatial-sectorial level. The research concludes with a set of conclusions and recommendations that determine the importance of the networking of cities according to their location, which is capable of adapting to the changes taking place in our Syrian cities. In the absence of a future vision for regional development that is appropriate to the current situation, taking into account the economic, social and spatial changes taking place; and which hinder the achievement of the proposed national framework for regional planning in 2010.

Evaluation of the Performance of the Locally Chisel Plough in its Effect on the Physical Properties of Heavy Clay Soil and Determining the Time Period for the Disappearance of These Effects

The chisel plough is the most important soil preparation machinery for planting and its direct effect on the physical properties of the soil is reflected in the cultivated yield. The purpose of this research is to evaluate the performance of the local chisel plough through its positive effects on the physical properties of soil so as to tillage heavy clay soil, the most difficult types of soils, and then determine the time period for the disappearance of these effects and the return of the soil as it was prior to tillage and planting in terms of these physical properties. When planting the wheat crop under Syrian conditions. The actual field capacity of the plough was (1.01 hec/h) and field efficiency (79.53%), and consumed fuel (13.97 l/h). There was a positive change in the physical properties of the soil due to the use of the chisel plough and two perpendicular faces, where the bulk density of the soil decreased (23.8%) and moisture content from (30.85%) to (28.33%). While increasing the total soil porosity (13.26%) and air porosity (56.76% ) and void ratio (45.71%). It was found that the positive effects of the chisel disappear during one agricultural season. The process of tillage cannot be dispensed with the tillage to cultivate the wheat crop under the Syrian conditions (the Algab area). It must be done the traditional tillage (two faces), Where it was found that the soil return to its status before tillage and planting after (180) days, before the end of the planting season and before harvesting the wheat crop by about a month. It was found that some of the physical properties of the soil contributed to determining the time period for the return of the soil properties as they were prior to tillage. These include the bulk density of the soil, the total porosity of the soil and the void ratio that are directly affected by tillage. Some of the physical properties did not contribute to determining the time period for the return of soil properties as they were prior to tillage. They include both soil moisture content and air porosity, which are affected by tillage, but are more affected by climatic conditions such as temperature and rainfall.

Studying the engineering and physical properties of seeds for some crops and their effect on the properties of feeders in seeders

A proper matching of agricultural machinery with properties of materials forms the essential requirements which lead to best performance of machine. To achieve that goal, availability of data and precision analysis on engineering and physical properties of these materials is required. This forms important and necessary data base for the design, development and structure of agricultural machinery and equipments, control and analysis of machines and determination of efficiency of machines. This research was carried out to study some engineering and physical properties of seeds of common Syrian crops to be used in the design and development of some agricultural machinery and equipments. Results provided the shapes and dimensions of cells of feeding devices for planting seeds of some crops namely, wheat, maize, lentil, pea, chick-pea, kidney bean, broad bean and cotton. In addition a set of empirical equations were established to be used to predict, with reasonable accuracy, the physical properties of crops seeds based on measurement of any of three dimensions (length, width and thickness).

Study the effect of pure silica alloy on the curve of the physical dispersion coefficient in optical fiber

The aim of this study is to study the possibilities of obtaining materials with a material shift to the higher wavelengths that fall within the C-Band window currently used in fiber optic communication systems. This is done by mixing pure SiO2 with different materials and different percentages. We find the evidence of refraction of the core material in an optical fiber and study the change of these clues by sequential wavelength of light from the solimer constants obtained from the OptiFiber program. We then calculated the physical dispersion factor DM for each of the studied materials by writing a special matlab program for this study and thus studying the change in the physical dispersion of these materials by the sequential wave length.

تحضیر و توصیف مادة لفح حراري شفافة راداریا

Modified resole resin/short silica fiber composite materials have been prepared. The resole resin was synthesized and then blended with Polyvinylbutyral (PVB) polymer with different weight ratios to reduce its brittleness. The mechanical, thermal and physical properties of Resol- PVB blends were studied to characterize these blends and select the most appropriate mixing ratio of polyvinyl butyral with resole resin, which was identified at 15 phr of polyvinyl butyral for every 100 parts of resole resin.

Modification of Pectin Structure by Using Tetrabutylammonium Hydroxide and Studying Some of its Properties

In this paper, the chemical structure of pectin has been modified by reacting of carboxyl group in pectin with tetrabutyl ammonium hydroxide [TBA-OH], (acid-base) reaction, to change hydrophilic properties by adding hydrophobic alkyl chains to the polymer chain in pectin, Some physical properties of both: pectin and tetrabutyl ammonium pectin; has been determined by measuring the Kinematic viscosity, degree of turbidity and density of their water solutions at different concentration.

Effect of using non - conventional and traditional organic wastes on some physical properties of clay soil and peanut productivity in Akkar Plain

This research was conducted in 2016c, at the Zahid Western Research Station in Akkar Plain region of Tartous Governorate, the objective of this research is study the effect of non-conventional organic waste (compost of garbage, sewage sludge) and cow manure on the physical properties of clay soil in the region. Wastes was added to the soil at a rate of (0 - 10 - 20 – 30) t/ha, in order to determine the effect of the difference in the quantity added on physical properties of the soil and peanut productivity.

Inspecting the behavior of precast concrete model pile driven in sand

This study concentrate on the driven pile in sand soils, to study and inspect this type of piles via minimized laboratory models in conditions similar to field conditions, and compare research result with actual load tests.

The most common physical gestures used by female student teachers during managing the classroom interaction in the first three grades

This study sought to identify the most common physical gestures used by female student teachers during managing the classroom interaction in the first three grades. The researcher adopted the qualitative research design which suits the nature of the study and the direct observation technique to collect the required data. The study population consisted of 112 students and the sample consisted of 40 female student teachers who were chosen with respect to the purposive method. The findings of the study come as follows: The most common gestures among the individuals of the sample are concluded in three forms of gestures: first, it is negative as the female student teacher is afraid and psychologically stressed. Second, it is positive as the female student teacher smiles at students and tries to communicate with them. Third, it is of a controlled nature of the classroom; frequency percentage ranged between medium to low. This may indicate that female student teachers do not rely mainly on physical gestures during managing the classroom interaction; this may go back to their reliance on other methods to deal with the wrong behaviors in the first three grades. Finally, the study recommended a set of recommendations.

The influence of The Physical Elements of The Architectural Work on The Formation of The Image

The image is composed of the physical elements of the architectural work like the shape , color , surface and etc … , and the visual, emotional and intellectual impressions and sensations associated with this work, and this image is affected mainly by the symbols and the meanings inspired by the physical elements of the different people users of these works.