Digital Repository for University of Tripoli

Abstract

This study covers the Fields producting from the Gialo Formation a reservoir which is composed of Limestone and Dolomitic-Limestone and consists mainly of highly altered Nummulitic Packstone. This study was achieved through three parts of study including a petrographic study, petrophysical study of reservoir properties from core analysis and borehole logs. The general geological framework was obtained from petrographical study of thirty six thin sections, 129 representative core plug data and logs from 5 different wells are utilized to better understanding the petrophysical framework of the formation. The plots correlating petrophsical parameters and the frequency histograms suggested the presence of distinctive reservoir trends. These discriminations were also represented in Winland porosity- permeability cross plots resulted in clusters for different port-size that are responsible for different flow characteristics. Linear and multiple regression were used for the study of each unit. The permeability models were constructed and their reliabilies were compared by the regression coefficients for predictions in un-cored well. The combination of all data revealed the worst ranked reservoir quality corresponded to moldic and intergranular pore types, which occurred mainly in the Bioclastic Wackstone facies. The highest ranked reservoir quality corresponded to intragranular and intergranular which occurred mainly in the Nummulitic Packstone Facies.
وردة الشوشان (2010)

Abstract

This study is to develop the specifications of the present cement products so as to comply with the quality and quantities requirements of the local market. The subject of this thesis is to present the results of a series of laboratory trials on a number of raw material mixtures prepared to produce moderate and high sulfate resistance cement at EL- Mergheb cement factory which currently produces ordinary Portland cement. At first, six different raw material sample mixtures were prepared from marlstone,marl and iron ore. The clinker (cement ) produced from these samples was within the moderate sulfate resistance cement ( MSRC ) specifications which mainly requires the tri calcium aluminate (C3A) to be less than 8 % by weight. The trial runs on other three raw material samples made that from mixing marlstone , clay , and iron ore produced clinker specifications that were out of those for MSRC namely, C3A is greater than 8 % . This means that the addition of clay to the raw mix prevents the production of cement with MSRC specifications. This was due to the high percentage of Al2O3 in the clay . The specifications of the clinker products based on these results , MSRC was successfully produced at the factory from raw material mixtures ( marlstone, marl and iron ore ) without any clay addition . Finally three raw mix samples were prepared from marlstone, marl, iron ore, and sand and tested in the laboratory to explore the possibility of producing high sulfate resistance cement ( HSRC) which requires C3A to be less than 5 % . The results of these laboratory trials showed that when the sand in the raw mix is kept under 1.80 % , the produced clinker specifications are within those of HSRC. The permission to carry out these trials in the factory is underway. The expected economic benefits from producing both MSRC and HSRC is highly feasible. Both types will be sold in local market without any additional operating or capital costs .
صالح محمد صالح (2013)

Abstract

This study is to identify some mutations in exons 23, 24, 26 A+B, and 26 A of the factor VIII gene that causes hemophilia A among Libyan patients. Forty-three patients (40 males, 3 females), 10 carrier, and 10 control (8 males, 2 females) were enrolled in this study. The total number were 63 samples for each exon. Blood samples were collected from Libyan patients (Department of Paediatric Hematology, Tripoli Medical Center), and kept in freezer at -20 Cº. The blood samples were transported to DNA laboratory in the Genetic Engineering Department and Human Tissues Department Biotechnology Research Center, Twesha- Libya. Genomic DNA was extracted from whole blood and DNA was visualized by Agarose Gel Electrophoresis, and DNA concentration was measured by Spectrophotometer. DNA was amplified by polymerase chain reaction (PCR) technique. Mutations were identified by restriction enzymes Taq I and Xba I. Taq I was used to detect nonsense mutations in Exon 23, 2147 [ Arg Stop codon (Term)], Exon 24, 2209 [ Arg Stop codon (Term)], and Exon 26 A+B, 2307 [ Arg Stop codon (Term)]. Our result showed no mutations were detected by using restriction enzyme Taq I in Exons 23, codon 2147, Exon 24, codon 2209, and Exon 26A+B, codon 2307. But by using restriction enzyme Xba I, we found six insertion mutations in Exon 26A, 3919 (ins GA) 11.3 % of 53 patients, and two partial deletion mutations in Exon 23 (3.8 % of 53 patients) refer to area failed to be amplified by PCR.
نادية نور الدين الصربوط (2010)

Abstract

This study was carried out to evaluate the exposure of lead (Pb) to some workers in Ash-Shoula lead acid battery Factory, Tajoura, Libya on the basis of concentrations of Pb in blood, hair, and nails. This study was done to explain, if accumulation of Pb could affect the concentration of essential liver enzymes, renal excretion, and some of hematological parameters. Study samples were based on, the number of years of work in battery manufactory, six work periods were constituted (< 5, 6-10, 11-15, 16-20, 21-25, >25 years). Workers were selected from seven different departments of the battery manufactory. Pb concentration in the collected samples were measured by using atomic absorption Spectroscopy. The statistical analysis were performed using SPSS software, version 20. The parametric tests (one-way ANOVA, t-test, and 2-tailed person Correlations) where P-value ≤ 0.05 was considered significant.Blood lead level was found high ranging from 9.9-60.3 μg/dl with a mean of 25.3 μg/dl and was found to be less in control group, ranging from 2.5-24.6 μg/dl with a mean of 11.8 μg/dl. The values of hair lead level were found to be ranging from 8.2-36.8 μg/g, with a mean of 21.1 μg/g and this was significantly higher than the control group (P
يوسف مسعود العزابي (2015)

Abstract

Today computers play an integral part in the analysis and design of civil engineering structures. Hand calculation is limited to simple structures, and initial member sizing (either during the preliminary design or prior to computer analysis). The matrix theory of structural analysis first began appearing in the early 1950s. Since that time, the engineers were not familiar with this new concept, hence a relationship between the matrix structural analysis, and the classical methods arise but the structural engineers as designers still follow the classical methods of solution such as, Hardy Cross moment distribution, Kani's method and deflection distribution ,method (D. D method) , etc. Structures that were too complicated to solve by classical calculations can now be handled with comparative ease when using computers. The analysis of complicated systems, such as highly indeterminate structures like space structures, grids-shells, etc. often could be handled by making many simplifying assumptions, to such extent, that in many cases the validity of the results had to be questioned. The use of computer techniques has broadened the scope of what the engineer can now handle in a reasonable time, and at a reasonable cost. Structures such as canopies, floor systems, and bridge deck systems. Are known as Grid structures. The members of a grid structure in general are subject to torsion as well as to shear and bending. Since the external loads are normal to the plane of the structure, the axial deformations are negligible. Consequently, a free joint in a grid is subject to a linear displacement perpendicular to the plane of the structure and to a rotation in the plane of the structure. It must be realized that the; use of so called matrix algebra methods and principles and methods of analysis, systematic matrix techniques have been now developed into recognized methods.
عمر على عودة (2009)

Abstract

Using the ground to produce condensate water for drinking and irrigation is A new application. This study simulates numerically the use of humid air flow in a buried pipe in the ground to obtain fresh water. The temperature difference between the humid air and the environment (ground) is exploited in this condensation process. The finite difference method is employed with pressure Correction method on staggered grid to simulate the flow of humid air through Buried pipes. The condensation occurs due to the decrease of the humid air Temperature below the dew point, as a result of the heat exchange between the humid air and the ground. The amount of condensation depends upon the flow Velocity, absolute humidity, Relative humidity and pipe geometry. For a selected pipe geometry of 22m long, and 0.2m diameter, the amount of condensation is about 26 kg/hr (0.006944kg/s). The results of the current study are in agreement to within ±10% of the results given by Jenney Lindblom.
مروان عبد السلام الهمشيري (2010)

Abstract

Water contamination is one of the major problems which the world is facing today. Water contamination not only effect environment and human health, but it has also impacts on economic and social costs. There are various ways used commercially and non- commercially to fight this problem which is advancing day by day due to technological progress There are many methods used for wastewater treatment, among these methods, the use of biological filters " trickling filter ", which depends on The basic idea is to get a larger surface area to get a better handle on the percentage. A composite media is used to replace the conventional stone in order to improve wastewater treatment in this thesis. The aim of this thesis to improve the performance of biological filters using nanotechnology, where to enhancing polymer media in biological and reinforced polypropylene by carbon fiber filters and talc by using electro spinning technology to produce the reinforced fiber that outlet from extruder. Design and simulate the extruder / die characteristics and studying The drag flow and pressure flow were then extracted from the screw parameters which lead into the calculation of the operation point and the operating pressure for the die. Also studying the effect of pressure and viscosity. Calculation of , and extruder characteristic is performed in order to allocate the operating point of the extruder.Two brand of carbon fiber are used in this thesis. The chapter type is at A tensile strength of 800 MN/m2. is selected. The operating pressure of the extruder is found to vary form 29.8 to 38.95 MN/m2 at an operating flow rate of 1.52*10-5 m3/sec. depending on the percentage of carbon fiber used in the blend.
محمود عيسى الفاما (2015)

Abstract

Wireless local area networks (WLANs) have been rapidly developed in recent years. It is used for various applications. VoWLAN, which transmits VoIP data over WLANs, shows its amazing attraction and constitutes one of the most flourishing applications nowadays in WLANs. One of Wireless Local Area Networks (WLAN) main drawbacks, when compared to wired networks, is that WLANs are less predictable and efficient. Wireless physical medium is harder to be controlled than physical wire. WLAN medium is also unlicensed, and thus susceptible to interferences produced by other devices. Therefore, great effort is being done in order to obtain Quality of Service (QoS) in real-time voice communications using WLANs. This topic has opened plenty of new research lines to upgrade current WLAN standards. In this thesis, a study is carried out for the behavior of new Medium Access Control (MAC) protocols defined in IEEE 802.11e draft standard Enhanced Distributed coordination function EDCF as well as for its subsequent modified versions. The Adaptive Enhanced Distributed coordination function AEDCF, designed to support QoS when providing voice communication services between stations in WLAN. Also presents experimental results obtained from simulations, and compare our results with simulations made using IEEE 802.11 standard MAC. The simulation work was done using NS-2 simulator, with the addition of specific modules for 802.11e. A performance comparison is carried out between the modified MAC scheme and IEEE standard MAC scheme, using Experimental simulation models. It is found that the adaptive technique method not only increases the medium utilization ratio and lowers the collision rate by more than 50%, but also enhances vii the overall throughput by around 20% compared with the basic IEEE 802.11DCF technique.
حسين ابراهيم ازويه (2010)