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Applying Virtual Team Software Process Methodology in Business Process Reengineering Software Development
No full textBusiness Process Reengineering (BPR) is developed as „the fundamental rethinking process and radical change of three isolated business process management information system (BPMIS) as financial, industrial, and marketing and research departments in an Eastern non-IT Development firm in order to reduce cost and improve quality, service and speed‟. The Rational Unified Integrated Process (RUIP) is developed to break down BPR barriers and efforts. RUIP has two phases: 1) the reverse reengineering where legacy waterfall system is rationally unified and refactored and 2) the forward reengineering where processes are unified and integrated. Then, the RUIP is a large application. RUIP may fail to meet expectations, over time and over budget. The Software Development Methodology scored high ratings in BPR and RUIP critical success factors. Thus, the paper compares the most matured and CMMI acceptable software process methodologies: the team software process (TSP) and the eXtreme Programing software (XP). The paper proposes VTSP methodology to deploy the ability of the plan driven TSP to accelerate quality of software development and to deploy the simplicity of eXtreme programming (XP) and its ability to break down large projects into small iterations and to involve onsite customers and end users. The VTSP proposed a new adaptation to simplify and to automate TSP project monitoring and documentation
Dynamic Response Inprovement
No full textThe electrical energy consumption is rising globally, due to which the demand for electricity is increasing everywhere. The renewable energy units are being integrated to a power system in large scale to fulfill the demands of electrical power. One of the most efficient and famous methods in renewable energy is wind power generation. Due to variable wind speed, the doubly fed induction generator (DFIG) is used in wind turbines. Double fed wind induction generator is connected with power network in large scale because of constant voltage and frequency, as when the rotor speed varies the stator supplies power to the grid. This paper presents the design and simulation of a doubly fed induction generator (DFIG) wind turbine, where the mathematical modeling of the machine written with d-q reference is established to investigate simulation. Furthermore, the simulation results are compared with the industrial data of a functional DFIG plant for realizing the accuracy of our model.Supervised By Dr. Hany Hassaie
Comparison of antibacterial effect and smear layer removal of herbal versus traditional irrigants – An in vitro study
No full textEndodontic infections are polymicrobial in nature dominated by obligate anaerobic bacteria. The microbial invasion prompts the host to respond with a combination of nonspecific inflammatory processes and specific immunologic response Eradication of root canal infection using chemo-mechanical pre- paration is of prime importance to remove vital or necrotic tissues from root canal system. Among the phases of endodontic treatment, the choice of instrumentation and irrigating solution that permit bacterial neutralization and toxin inactivation without negative interference with the healing process is fundamental to the success of treatment [2]. Numerous solutions have been used in endodontics to achieve the de- sired chemical effect since sodium hypochlorite was introduced by Walker in 1936.Future Dental Journa
An Approach for Requirements Based Software Product Line Testing
No full textTesting in software product lines plays an important role to insuring quality not only for software products put also for the product line itself. In this paper we investigated different approaches that start the testing process from requirements in the context of software product line. Two approaches have bees selected, analyzed and evaluated. Then we improved one of the analyzed approaches to solve the problems facing software product line testing
The relationship between Exchange Rate and inflation
No full textThe effect of the exchange rate on inflation is one of the most important contemporary issues in the economy, which must be solved and eliminated. The reason for interest in this issue is that it is one of the fundamentals and concerns of the economy, not the exchange rate and inflation affect the economy and consumer prices as well. The change in the foreign exchange rate affects prices and therefore changes in inflation. The exchange rate also affects the prices of imported goods. These commodities are allocated to the consumption market as they affect the raw materials used in the manufacture of goods and indirectly affect the balance of imports. ( Worstall . 1970 ) , (n.n . 2012) , ( Riley. 2009 ) , (Amadeo, 2018) .
The change in the exchange rate affects the real exchange rate through its effect on economic activity, leading to the emergence of inflation and starts to increase as the change in the exchange rate leads to a change in interest rates and an increase in inflation. Are unable to take loans for investment and set up projects and manufacturing for domestic consumption or for export. Also, people who implement projects will not have the ability to complete the project because they can not finance the project due to inflation and high interest rates. (n.n . 2005) , (Uribe.1997 ) .
In the event that inflation has decreased and decreased, interest rates will become low and thus will be able to invest, set up projects and export. Naturally, in the event of lower inflation, the exchange rate will be reduced. Any change or fluctuation in the exchange rate directly leads to a change in the value of the national currency of local products and services. Any change or fluctuation in inflation will also lead to this. In the event of a decline in value, the market will be less than competitive and will therefore affect the volume of exports. Its decline and decline will adversely affect economic activity and affect inflation. (n.n . 2005) , (n.n . 2012) .
Inflation also affects the purchasing power of individuals and their income. Inflation is related to a recession. There are different exchange rate regimes trying to address the problem. The flotation of the Egyptian pound is supposed to have reduced the crisis and solved it, but the opposite has happened. The exchange rate has a direct and indirect effect on inflation. (n.n . 2012) , ( Riley. 2009 ) .
(Uribe.1997) , ( Worstall . 1970 ) , (n.n . 2005) , ( Riley. 2009 ) , (n.n . 2012) , (Shapiro . 2012) , (Amadeo, 2018)
Target cost (TC) and guaranteed maximum price (GMP) methodology
No full textThis paper measure how to mitigate the risk factors of target cost contract (TCC) & guaranteed maximum price (GMP). This paper is based on the primary approach through interviews with contractors in contracting companies in Egypt. Our interviews was designed to mitigate the impact of risk factors in the contracting companies. The results of this study proved that there are companies in Egypt uses the target cost contract or guaranteed maximum price and some contractors prefer using target cost contract or guaranteed maximum pric
Adipose mesenchymal stem cells– derived exosomes attenuate retina degeneration of streptozotocin-induced diabetes in rabbits
No full textThis study aimed to evaluate the effect of mesenchymal stem cells (MSCs)–derived exosomes in retina regeneration of experimentally induced diabetes mellitus (DM) in a rabbit model. Exosomes are extracellular vesicles that contain many microRNAs (micRNAs), mRNAs, and proteins from their cells of origin. DM was induced by intravenous (IV) injection of streptozotocin in rabbits. MSCs were isolated from adipose tissue of rabbits. Exosomes were extracted from MSCs by ultracentrifugation. Exosomes were injected by different routes (IV, subconjunctival (SC), and intraocular (IO)). Evaluation of the treatment was carried out by histopathological examination of retinal tissues and assessment of micRNA-222 expression level in retinal tissue by real-time polymerase chain reaction. Histologically, by 12 weeks following SC exo- somal treatment, the cellular components of the retina were organized in well-defined layers, while IO exosomal injection showed well-defined retinal layers which were obviously similar to layers of the normal retina. However, the retina appeared after IV exosomal injection as irregular ganglionic layer with increased thickness. MicRNA-222 expression level was significantly reduced in diabetic controls when compared to each of healthy controls and other diabetic groups with IV, SC, and IO routes of injected exosomes (0.06 + 0.02 vs. 0.51 + 0.07, 0.28 + 0.08, 0.48 + 0.06, and 0.42 + 0.11, respectively). We detected a significant negative correlation between serum glucose and retinal tissue micRNA-222 expression level (r ¼ 0.749, p ¼ 0.001). We can associate the increased expression of micRNA-222 with regen- erative changes of retina following administration of MSCs-derived exosomes. The study demonstrates the potency of rabbit adipose tissue–derived MSCs exosomes in retinal repair. So, exosomes are considered as novel therapeutic vectors in MSCs-based therapy through its role in shuttling of many factors including micRNA-222
A new atlas for 8-bar kinematic chains with up to 3 prismatic pairs using Joint Sorting Code
No full textMechanism and Machine Theory
Volume 124, June 2018, Pages 118-132It is important for designers of mechanical systems to visualize as many kinematic structures of mechanisms as possible. In this paper, a systematic methodology is proposed to generate all solutions of planar 8-bar kinematic chains (KCs) with up to 3 prismatic (P) pairs. First, a totally automated technique is developed to enumerate all available configurations of prismatic pairs for each KC. Second, Joint Sorting Code (JSC) is introduced for the first time to represent all KCs. Then a Kinematic Chain Structural Matrix (KCSM) is generated for all KCs to solve the problem of isomorphism. Finally, all results are evaluated by considering rules of P-joints assignment introduced by Ref. [1]. A vc++ code has been developed for enumeration, codes generation and isomorphism detection processes. The proposed methodology produces a new atlas for 8-bar chains that contains 16 groups and 48 subgroups. It contains 108, 426 and 816 KCs with 1P, 2P and 3P-joints respectively. The presented technique can be extended to single degree-of-freedom (DOF) planar n-bar chains with simple joints
A COMPARATIVE STUDY OF DIFFERENT CONTROL TECHNIQUES FOR ACTIVE SUSPENSION SYSTEMS
No full textVehicle's suspension system is considered a key element of vehicles' structure. The term suspension refers to the mechanism that supports the vehicle's static weight, and separates it from the tires. The design of a reliable suspension system is a very challenging process as the aimed performance is a compromise between conflicting factors. Meanwhile a soft suspension stiffness improves ride comfort and road holding, supporting the vehicle's static weight requires a stiff suspension. Passive suspension systems are deficient to provide the desired performance under various road irregularities. Traditional suspension systems use an arrangement of springs and dampers of fixed stiffness and damping coefficients respectively. They lack to the ability to adjust themselves to the differing road roughness.
The main objective of the thesis is to provide an integrated study for the performance of both quarter, and half active suspension systems using linear and nonlinear models. Active Suspension Systems include several complex technical problems that made it an interesting search field. This research is focused on control techniques that can be applied to enhance its performance. In brief, the studied problem is controlling active suspension systems more effectively and responding accurately to the varying road surface roughness. In this study, dynamic modeling and simulation of the active suspension systems under the effect of various road surfaces are presented. Particle Swarm Optimization (PSO) technique is used for tuning the discussed controllers. Proportional Integral Derivative (PID), and Fuzzy Logic controllers are used for the linear quarter, and half vehicle active suspension systems. For the nonlinear quarter vehicle active suspension system, both feedback linearized, and Fuzzy Logic controllers are presented. Whereas, a Fuzzy Logic controller are implemented for nonlinear half vehicle active suspension systems.
For the linear Quarter Vehicle Active Suspension System (QVASS), PSO-tuned PID controller has proved better performance in providing ride comfort and road holding. On the other hand, the PSO-tuned Fuzzy Logic controller has enhanced the suspension system ability to support the vehicle's static weight. For the nonlinear QVASS, PSO-tuned PID controller has enhanced the ability of system to provide a more comfortable ride for all road disturbances, road holding for all roads except double bump, and load carrying for bump and hole road.
For the linear Half Vehicle Active Suspension System (HVASS), PSO-tuned fuzzy enhanced ride comfort, ride handling, and road holding for random bump road, and boosted the ability of load carrying, and road holding for single bump road. PSO-tuned PID provided better performance in all factors except ride comfort for double bump and bump and hole roads. For the PSO-tuned fuzzy nonlinear HVASS, the controller proved the best ride comfort and ride handling with single bump road, while providing the best road holding, and load carrying with bump and hole road.Under the Supervision of Prof. Ahmed Mohamed Kame