Ga1−xMnxN Magnetic Semiconductors: First-Principles Study PDF |
| Farah Ali Deib Saleh |
| Supervisor(s) |
| Dr. Abdel-Rahman Abu-Labdeh - د. محمد سلامه سالم أبو جعفر |
| Discussion Commity |
| 1- Dr. Abdel-Rahman Abu-Labdeh (Supervisor) 2- Dr. Mohammed S. Abu-Jafar (Co-Supervisor) 3- Dr. Rezek Estaiteh (External Examiner) 4- Dr. Musa El-Hasan (Internal Examiner) |
| 122 صفحة |
| Abstract : |
Abstract
We present the results of First-Principles calculations of the magnetic semiconductors for systems taking the concentrations (0.0,0.125, 0.25, 0.50, 0.75 , 1.00) in the Zinc-blende Structure (ZB-Structure), using a self-consistent full-potential linearized augmented plane-wave (FP-LAPW) method implemented by the WIEN2K package. The local spin density approximation (LSDA) as well as the generalized gradient approximation (GGA) are used to treat the exchange correlation potential, and taking into account spin polarization.
In order to design new or employ the existing diluted magnetic semiconductor materials, the underlying mechanisms of magnetism must be understood. The total energy versus lattice constant is obtained using the spin density functional theory (DFT). It is found that the equilibrium lattice parameters strongly depend on the concentration of the Mn-dopant (x ). Also we found that the energy band gaps ( ) for these systems depend on (x ), in other words the energy band gap decreases by increasing the Mn concentration.
We mainly studied the Bulk parameters of our system, band structures, and magnetic properties. We made numerical investigations of the structural, magnetic properties for simple cases under pressure, in other part of our results we report an analysis of structures, magnetic properties of the , i.e GaN doped with Mn, with different concentrations, 0.125, 0.25, 0.5, 0.75 and so for major, minor compounds (GaN, MnN). |
Saturday, January 16, 2010
Ga1−xMnxN Magnetic Semiconductors: First-Principles Study
COST VALUE FUNCTION OF WATER DISTRIBUTION NETWORKS A Reliability-Based approach using MATLAB
COST VALUE FUNCTION OF WATER DISTRIBUTION NETWORKS A Reliability-Based approach using MATLAB PDF |
| Khalid Ahmad “Mohammad” Hasan As-Sadiq |
| Supervisor(s) |
| Dr. Mohammad Najeeb Ass’ad - د. محمد نهــاد المصري |
| Discussion Commity |
| 1.Dr.Mohammad N. Ass’ad (Major Supervisor) 2.Dr. Mohammad N. Almasri (Supervisor) 3.Dr. Samir Matar (Internal Examiner) 4.Dr. Saed F. Mallak (External Examiner) |
| 128 صفحة |
| Abstract : |
Abstract
Every community on Earth ought to find the appropriate means to distribute water from different sources to a consumption centers. In general, water distribution networks (WDN) attain this. Each network is composed of arches (to deliver water) and nodes (to consume the water delivered). The ability of any WDN to satisfy the requirements at each node under normal and abnormal conditions is one of the dimensions of its reliability. A method was introduced in this work to evaluate the reliability of a WDN for several combinations of diameters. A network solver was used to find the diameter combination successively. The results obtained from the network solver were saved in a text file. This file is then read by MATLAB, in order to do the necessary calculations. The system reliability for each diameter combination was computed. The values of the system reliability of each diameter combination are recorded as a vector in the MATLAB environment. The most important objective is the maximum of the system reliability of all these combinations, which has been achieved by MATLAB. For this maximum reliability value, we have determined the corresponding values of the cost, where each one represents a diameter combination. The minimum of these values is then determined using a computer code that was developed within the method. MATLAB was used to develop the computer program that converts the information into matrices, which make the required outcome easy to obtain and process. A hypothetical case study was developed to demonstrate methodology implementation. The results were composed of two important things: The computed reliability of any WDN and the way to find the least cost design with a value of reliability that is over a minimum boundary value. Another important thing is all the alternatives of reliability values that can be achieved with a specific budget that we already have.
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Simulation in Queuing Models: Using Simulation at Beit-eba crossing check-point
Simulation in Queuing Models: Using Simulation at Beit-eba crossing check-point PDF |
| Fatima Yousef Abdalla Barham |
| Supervisor(s) |
| Dr. Mohammad Najeeb - لؤي ملحيس |
| Discussion Commity |
| Dr. Mohammad Najeeb (Supervisors) Dr. Luai Malhis (Co-Supervisors) Dr. Rasheed Al-Jayose (External Examiner) Dr. Ali Barakat (Internal Examiner) |
| 107 صفحة |
| Abstract : |
Abstract This thesis consider some queuing models to determine the measures of performance of a model. The most important measures are the waiting time in the queue and the size of the queue. The queue we are studying is the Beit-eba crossing check-point for both people arriving and people departing from Nablus City. A comparison is made in order to determine the best fit model among two assumed models and the one under study(real one)using a suitable tool of simulation “SimQuick” which performs process simulation within the Excel spreadsheet environment. To prove that we got good results for our study. We started by an assumed queue model and solve it analytically by the known formulas of queuing theory. Next, we use simulation by "SimQuick" to compare results, which showed a good agreement between analytical solution and simulation. The study showed that the single-channel queue is more efficient than the multiple-channels queues. |
Performance of Awassi Lambs Fed Citrus Pulp and Olive Cake Silage
Performance of Awassi Lambs Fed Citrus Pulp and Olive Cake Silage PDF |
| Ahmad Ismail Ahmad Za'za' |
| Supervisor(s) |
| Prof. Jamal Abo Omar - |
| Discussion Commity |
| Prof. Jamal Abo Omar Dr. Maen Samara Prof. Adnan Shqueir |
| 70 صفحة |
| Abstract : |
Abstract This experiment was conducted to investigate the effects of feeding different home made silages on performance of fattening lambs and nutrients digestibility. Sixteen uniform males of Awassi lambs were used in feeding trial that was lasted for 77 days. The trial was followed by a 6-day digestion trial. Lambs were divided into four experimental groups. Lambs in each group were fed and had free access to water. Three types of silages were prepared using wheat straw (WS), olive cake (OC) and citrus pulp (Cp). The three by-products were respectively used as the following: silage 1, 60/27/13; silage 2, 20/54/26 and 0/48/52, silage 3. The silages were offered to lambs along with fixed amount of a commercial fattening concentrate which was 78% of total rations fed. Performance of lambs was significantly (P<0.05)> |
Effect of Light Stimulation and Body Weight on Productive Performance of Broiler Breeder Hens
Effect of Light Stimulation and Body Weight on Productive Performance of Broiler Breeder Hens PDF |
| Othman Hashem Hassan Shahadi |
| Supervisor(s) |
| Dr. Maen Samara - |
| Discussion Commity |
| 1. Dr. Maen Samara / Chairman 2. Professor Dr. Adnan Shqueir / External Member 3. Dr. Rateb Aref / Internal Member |
| 100 صفحة |
| Abstract : |
ABSTRACT An experiment with broiler breeder pullet's was carried out to determine the effect of pattern of light stimulation and pullets body weight at 20 wk of age on body weight and age at onset of egg laying. Two light stimulation treatments were used: abrupt light stimulation (ALS) in which hours of light were increased to 10 hr at 21 wk, 12 hr at 5% egg production, 14 hr at 35% egg production, and finally to 16 hr at 65% egg production; and step-up light stimulation (SLS) in which hours of light were increased to 12 hr at 21 wk of age, then by half an hour weakly until 16 hrs of light are attained at 29 wk of age. Pullets were randomly assigned to one of three body weight groups: low weight (1800 g), medium weight (2200 g), or heavy weight (2600 g) at 20 wk of age. The results obtained indicated that pattern of light stimulation and weight at 20 wk did not markedly affect egg production, however, pullets exposed to SLS or ALS produced the lightest eggs. A numerical advancement occurred in age at first egg due to SLS. Significant weight gain occurred in low weight pullets due to SLS. The results of this experiment indicated that SLS of low weight broiler breeder pullets represents a viable means for advancing onset of lay, and increasing weight gain at onset of lay .
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Optimal Operation Strategy and Economic Analysis of Rural Electrification of Atouf Village by Electric Network, Diesel Generator and Photovoltaic Syst
Optimal Operation Strategy and Economic Analysis of Rural Electrification of Atouf Village by Electric Network, Diesel Generator and Photovoltaic System PDF |
| Eng. Asma Mufeed Ibraheem Yasin |
| Supervisor(s) |
| Dr. Imad Ibrik - |
| Discussion Commity |
| 1. Dr. Imad Ibrik (Supervisor 2. Dr. Abd-Alkareem Dawood (External Examiner) 3. Prof. Marwan Mahmoud (Internal Examiner) |
| 136 صفحة |
| Abstract : |
Abstract This thesis describes the optimal operation and economic analysis of rural electrification of Atouf village by electric network, diesel generator and photovoltaic system, and also the design and testing of an 11.7 kWp PV system and summarizes its performance results after the first 6 months of operation. This system functions as a stand-alone power system used to supply electricity for Atouf village. The system is comprised of the following components. An array consist of PV modules produced from polycrystalline solar cell of 130W, making up a total peak power of 11.7 kW. In addition, there is one inverter of 7.2 kW, and an energy storage system of 120 kWh. After the first 6 months of system operation from December 2007 to May 2008, it was found that all the components and the overall system had worked efficiently. In total, the system had generated during this period about 7596 kWh, average solar radiation in this period about 4.67kWh/m2-day, daily input solar energy of the total system surface was 390.5kWh, and the average electricity production per day was 46.11kW. From the economical view point, photovoltaic energy system differ from conventional energy systems in that they have high initial cost and low operating costs. This study shows that the unit cost of the PV system is 2.69 NIS/kWh which is less than that of the diesel generator systems in Atouf village. |
Civil Accountability for Doctors Comparative Study
Civil Accountability for Doctors Comparative Study PDF |
| Wael Tayseer Moh.Asaf |
| Supervisor(s) |
| Dr. Hussein Mashaqi - |
| Discussion Commity |
| 160 صفحة |
| Abstract : |
Abstract Medicine in a sacred human, moral, and scientific pretension; it has it. Own permanent importance thin profession in the real source for the relation between the doctor and the patient Moreover, it in a humanitarian and legal in nature which dictates on the doctor to take care of him patient and to do everything to cure him/her due to what thin profession requires. The Jordanian legislature, as his peers in most Arced countries has not considered the medical accountability in some special terms, but left it to the general rule in the civil accountability; this state of not dealing with it, left thin accountability unclear. In this respect, I have studied it in details in an introductory chapter and in other four detailed chapters as follow, the introductory chapter where I dealt with the historical development of the medical accountably from the old ages till them medieval ages to the Islamic Sharia and finally to the modern ages. I also stated the development in each stage. In the first chapter, I have dealt with the civil accountability in its two sections, the contract and the shortage section and diagnosed the features and characteristics of each one of them. After that, I looked of the legal nature of the civil accountability for them doctor and the available difference in the points of the legal view on its adaptability. Some trend rightly consider it a shortage accountability, while other trend rightly consider it a control accountability. I have stated the confirmed view from the juries diction and jurisprudence (Fiqh) opinion taking into account the French Cassation Court resolution in 20/5/1936 which considers it a contract accountability in origin, and a default in exception. I also have searched in the commitment of the doctor toward. the patient and the relevant legal opinion on whether thin goes with taking care or achieving a result. The study shows that the commitment of the doctor in to take care in origin and to achieve a result in exception. The doctor care in not as any other care, it has to be vigil and authentic and goes with the fixed scientific terms. In the second chapter. I have dealt with the elements of this medical a accountability which chare this error (incorrect action) and undamaged and this reason relationship. At of error linguistically and legally. In addition, h have defined the medical error which in the corner store for out study moreover, I have clarified the attitude of the Jordanian legislature who build that accountability on the damage rather than these error. The medical error generally deals with the deviation of these doctor away from him morals and not meeting his duties of being vigil. Then, I moved into the attitude of juries diction, Arabic jurisprudence, and Islamic jurisprudence towards them gradualist of medical errors. The decision in thin respell in to question the doctor on all faults he makes to his patients on condition of their reliability. At the end of this chapter, I have discussed these criterion of the medical error and the other relived opinions. This in the criterion of the layman i.e then behavior of the ordinary doctor of the same specialization and the same scientific level for these mistaken doctor. In the third chapter, I have discussed the medical mistaken from a scientific point of view. This in an important issue since clarifies the medical mistakes committed by workers in the field of medicine. I also indicated the most spread mistakes through real detailed cases and real court verdicts such as: diagnoses mistakes not taking medicine, treatment mistakes, plastic surgery mistakes, anesthetic and delivery mistakes, transcription mistakes. Supervision mistakes, disclosing medical secret, and finally performing treatment not for cure purposes. In the third chapter, h have discussed the legal responsibility of the doctor, on the legal responsibility of the doctor, on the mistakes committed by his staff in the different medical profession, there are two trend, relevant to this issue, one in commenced with the doctor who work, in public or private hospital, and his legal relaters with the patient; thin other trend deals with the doctor who work, for his own and the responsibility relevant to his aids toward the affected person. I also discussed the responsibility of the doctor on the mistaken resulted from machines, apparatuses used to trial patients. In this respect, I discussed then issue of proving the medical mistake which lies on the patient and the hardships he faces to prove this mistake because of lack of experience which commotion with the issue of friendship among doctors and the legal tends, around this issue. After that, I have shifted into the second characteristic of the doctor civil accountability and that in the medical damages its types, conditions and its problems. This could hurt this individual in one of his rights relevant to his body, money, passion, honor, freedom or dignity. This damage could be physical or moral, it differs from one person to another. Indicting, this reason relationship between this mistake and the damage which goes under the public rules of civil responsibility in the patients role to prove. There are three different theories in this respect theory of equal reasons, theory of suitable reasons, and theory of missing chances.
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