Weirs are used to control and regulate the flow in open channels. In gabion structures, the flow ... more Weirs are used to control and regulate the flow in open channels. In gabion structures, the flow conditions are more complex due to the complexity of flow through the porous body of a gabion. The present study aims to investigate the water surface profile, the overflow velocity profile, and both the through-flow and overflow ratios. Six physical models of the three downstream slopes (V:H 1:1, 1:2, and 1:3) and two types of rockfill (crushed stone and rounded gravel) were investigated. Results show that for the same discharge, the milder slope model (1:3) shows higher water surface and higher velocity than the steeper slope (1:1) with about 9 and 8% on average respectively. The water surface was 60% higher on the lower steps than on the upper steps at the nappe flow regime. Moreover, the low porosity models show a slightly higher velocity and flow depth than higher porosity models for all sections. Furthermore, increasing the porosity from 0.38 to 0.42 led to about a 27% increment in...
OBJECTIVE: Morbid obesity is one of the major health problems, there are many operations performe... more OBJECTIVE: Morbid obesity is one of the major health problems, there are many operations performed to resolve this problem. The current studies revealed that no one of them can be considered the gold standard operation. The aim of this study: was to compare laparoscopic sleeve gastrectomy with greater curvature plication for management of morbid obesity, with special emphasis on depression. Methodology: Between January 2012 and June 2014, thirty adult patients were included in this study, which was carried out in New Dameitta University Hospital. They were randomly divided into two equal groups. Group A underwent laparoscopic sleeve gastrectomy (LSG), while Group B underwent laparoscopic greater curvature plication (LGCP). Patients data, operative time, complications, percentage of excess weight loss (EWL %), and level of depression were documented. The mean follow up time was 19.56 months (range 6-29 months). Results: No statistical difference between the two groups as regard, post...
Drip Irrigation Method is the best method that has been used in the world among the other irrigat... more Drip Irrigation Method is the best method that has been used in the world among the other irrigation methods because of its good and high uniformity. This method distributes water to the field using the pipe network and transforms it from the pipe network to the plant by emitters. In spite of the advantages of drip Irrigation method, the traditional network in drip irrigation method has many problems. The main problem is the drop in pressures and discharges distribution in the network resulting from the amount of pressure losses between the head of the lateral as compared with that in the end of the lateral. This drop affects the discharge distribution of emitters and uniformity. The research studies the improvement of emission uniformity of emitters by using new system layouts instead of the traditional system. The first proposed system layout concluded to improve the hydraulic performance by improving the pressure of distribution in the system by connecting the ends of the lateral...
Weirs are used to control and regulate the flow in open channels. In gabion structures, the flow ... more Weirs are used to control and regulate the flow in open channels. In gabion structures, the flow conditions are more complex due to the complexity of flow through the porous body of a gabion. The present study aims to investigate the water surface profile, the overflow velocity profile, and both the through-flow and overflow ratios. Six physical models of the three downstream slopes (V:H 1:1, 1:2, and 1:3) and two types of rockfill (crushed stone and rounded gravel) were investigated. Results show that for the same discharge, the milder slope model (1:3) shows higher water surface and higher velocity than the steeper slope (1:1) with about 9 and 8% on average respectively. The water surface was 60% higher on the lower steps than on the upper steps at the nappe flow regime. Moreover, the low porosity models show a slightly higher velocity and flow depth than higher porosity models for all sections. Furthermore, increasing the porosity from 0.38 to 0.42 led to about a 27% increment in...
OBJECTIVE: Morbid obesity is one of the major health problems, there are many operations performe... more OBJECTIVE: Morbid obesity is one of the major health problems, there are many operations performed to resolve this problem. The current studies revealed that no one of them can be considered the gold standard operation. The aim of this study: was to compare laparoscopic sleeve gastrectomy with greater curvature plication for management of morbid obesity, with special emphasis on depression. Methodology: Between January 2012 and June 2014, thirty adult patients were included in this study, which was carried out in New Dameitta University Hospital. They were randomly divided into two equal groups. Group A underwent laparoscopic sleeve gastrectomy (LSG), while Group B underwent laparoscopic greater curvature plication (LGCP). Patients data, operative time, complications, percentage of excess weight loss (EWL %), and level of depression were documented. The mean follow up time was 19.56 months (range 6-29 months). Results: No statistical difference between the two groups as regard, post...
Drip Irrigation Method is the best method that has been used in the world among the other irrigat... more Drip Irrigation Method is the best method that has been used in the world among the other irrigation methods because of its good and high uniformity. This method distributes water to the field using the pipe network and transforms it from the pipe network to the plant by emitters. In spite of the advantages of drip Irrigation method, the traditional network in drip irrigation method has many problems. The main problem is the drop in pressures and discharges distribution in the network resulting from the amount of pressure losses between the head of the lateral as compared with that in the end of the lateral. This drop affects the discharge distribution of emitters and uniformity. The research studies the improvement of emission uniformity of emitters by using new system layouts instead of the traditional system. The first proposed system layout concluded to improve the hydraulic performance by improving the pressure of distribution in the system by connecting the ends of the lateral...
Uploads
Papers