In this paper, the modeling methods of tunneling and the surface subsidence induced by
that have been studied by using two-dimensional numerical analysis according to the FEM
method, assuming the green field condition، which means that there is no
load on the soil
surface above the tunnel. A FE study was conducted in which an elasto-plastic constitutive
model was adopted to model the soil behavior (HS, HSsmall).
This article includes a comparison between the results of numerical analysis and field
measurements to executed projects، and a suggested method for modeling tunnel
excavation and surface subsidence induced by that.
This study investigated the effect of adding different
percentages of sand to several types of clay soils, Which used as
liners at solid waste landfill sites in order to find the best mixing
ratio (sand - clay).
In this paper, ground surface settlement induced by tunneling have been studied
using 2D finite element analysis. By assuming greenfield conditions, which means that
there is no loads on the soil surface above the tunnel.
A FE study was conducted
in which an elasto-plastic constitutive model was adopted
to model the soil behavior (MC,HS).
This paper include Comparison between actual field measurements with (FEM)
results, and parametric study for the most factors that influence ground surface settlement.
In this paper the effect of the distinctive properties of Shape Memory Alloy (SMA)
―the ability to undergo large deformation and restore it after stress removal‖ has been
studied to see to what degree it may affect the structural performance of mul
ti-storey tall
buildings.
Using ANSYS software, two 3D Finite Element (FE) models are built for a
composite multi-storey building (20 story) which is resistant to lateral loads by bracing
system. One of them is with steel bracing and the other is with SMA bracing. Both models
take into account nonlinear material properties of elements and geometric nonlinearity.
The model with SMA material shows improved performance compared with the
model of steel bracing in terms of residual deformations and ductile performance.
The research aims to study the possibility of using practical methods to monitor the
geodetic vertical deformations, and to study the engineering of the origin of the
strengthened carbon fiber. Because of proposed changes in the construction status
of some
of its elements, the study will be accompanied by simulation of the proposed changes by
adding additional live and dead loads, that are equivalent to the new situation. This study
will be made by measuring the vertical displacements for some points of those elements
within optimal control network based on geodetic network confidence requirements. This
study will also assess the potential use of electronic digital high accuracy levels and the
supplied software.
The research succeeds in showing the possibility of quantifying the potential
deformations in reinforced elements, as well as the efficiency of the proposed method of
control and the equipment used.
The aim of this study was to determine the best size and shape of containers to produce higher quality seedlings, and determine which treatments (moving the seedlings to other beds, or transfer to bigger containers, or pruning the shoot and root syst
em of Ceratonia siliqua seedlings in the nursery) are the best for growth and stabilization in out planting. The study showed that the control seedlings D1 which were growing in traditional plastic containers (1 liter) gave low survival rate which did not exceed 20%, and this was due to numerous reasons mainly roots deformation. Seedlings D8, the containers(2 liters) improved the morphological characteristics of root and shoot system and reduced the roots deformation, which led to higher survival rate reached more than 82%. While the deep containers and the air pruning improved the structure and spread the root system of seedlings D9 and limited the roots deformation, which led to higher survival ratio reached more than 95%. Moving the seedlings to other beds in the nursery improved the survival rate in out planting, which amounted ,in D2, to more than 95% and in D3 over than 67%. Also, the study confirmed that cutting the developing top of shoot system and leaving the seedlings in the beds until their planting date D4 did not give a significant effect compared to D5 in which the developing top of their shoot system was cut and was transferred to bags of (12 liters) with pruning the root system, and the survival rate was more than 72% in D4, and over 62% in D5. Regarding to survival rate under the influence of transport operations to larger bags, the D7 which was transferred to bags of 3 liters capacity surpassed in significant differences and was 77.5% compared to D5 and D6 which was transferred to 12 liters bags, where the survival rate in which was 62.5%.
Determination of infertility cause and the quality of sperms in semen are the
most important factors when we want to choose the suitable method of therapy
of assisted reproduction techniques, which has been proven to be the most
effective method t
oday in the treatment of many cases of male infertility, and it
allows to choose the best sperm for Intracytoplasmic sperm injection technique
(ICSI).
In our study we tried to find a relationship between one of the semen
parameters with the other basic parameters, we studied the concentration
motility and morphology of sperms of 23 infertile men with oligozoospermia,
and 5 control cases for fertile men.
Back pound: Patients with end stage renal disease (ESRD) and lower urinary tract anomalies (LUTA) are often considered high risk for renal transplantation.
Methods and subjects: To evaluate the degree of risk, we have reviewed our experience of 17 p
atients with (ESRD) and (LUTA). The study was carried out in Almoussat university hospital, between 5/ 2003 and 5/2009. After a detailed urological assessment, the patients had been undergone either non-continent cutaneous diversion (Bricker) (Two patients) or continent cutaneous diversion with bladder augmentation (14 patients), before renal transplantation.
Results: The patient and graft survival rates were 84.62% and 100%, respectively. The presence of an ileal conduit did not adversely affect graft survival. And the commonest complication was persistent urinary tract infection, which occurred in all patients (100%), but didn’t cause any graft loss. However two patients died because of systemic infections and their graft function was
good.
Conclusion: Renal transplantation is a satisfactory option for patients with ESRD due to LUTA, but it is important to carry out detailed urological assessment prior to the transplant procedure.
