Sharif Digital Repository

Anomalous top quark interactions with gluon (tug , tcg) allow the production of single top quarks at the LHC. Two main sources of backgrounds which we took into account are W +1j and standard model single top production. In order to do it, we examine the reconstructed angular distribution of the charged lepton in the rest frame of W boson from the top quark. It is defined in terms of the angle θ_l , between the charged lepton momentum in the rest frame of the W boson and the momentum of the W boson in the rest frame of the top quark. Using this angular distribution of the charged lepton from the W boson in the top decay، we show that with the data of 10fb^(-1) of integrated luminosity and... 

The detuning of the structures equipped with Tuned Mass Dampers (TMDs) caused by their nonlinear behavior under strong ground motions is a real concern in their practical application. This thesis presents a feasibility study on the effectiveness of TMDs in reducing the seismic response and the resulting structural damage of reinforced concrete structures under intense ground motion. A number of 2-D concrete moment resisting frames with different numbers of stories are considered. TMDs are used as a mean to protect these structural models against ground excitation. The mass of TMDs are varied from 1% to 5% of the first effective modal mass of the structural models. IDARC 2-D program is used... 

Synthesis gas is a gaseous mixture which mainly consists of carbon monoxide and hydrogen. Different methods are used to produce synthesis gas but the most important method is auto thermal reforming. This method is based upon catalytic reactions. Steam, oxygen and natural gas are the influents to the reactor and synthesis gas will be the effluent. Ni catalysts on alpha-alumina as the support media are usually used in this process. These catalysts are highly heat resistant and insure great qualifications for reactions. This thesis tries to find best solutions of synthesis gas production suitable for feeding to a methanol production unit. There are four main reactions. Three of which are highly... 

Programmers often use object-oriented application frameworks, such as Eclipse, due to their several advantages, some of which are: providing a standard platform for designing and implementing software systems, enabling the reuse of both code and design,reducing the development’s time and costs, and increasing the maintainability of systems.However, frameworks evolve over time because of new requirements or fixing bugs. Therefore, the programs that had been written on top of those frameworks also need to evolve to become compatible with them; otherwise, they may crash.This thesis presents an approach that comprehends the evolution of frameworks through comprehending the evolution of the... 

Business Activity Monitoring (BAM) is a method for evaluating current condition of organization from the viewpoint of reaching to its strategic objectives and helps man-agerstobe informed straight forwardly about thecurren tstatu sofeach Key Performance Indicator (KPI). Enterprise Service Bus (ESB) is an infrastructure for transferring web services between some software components that performs in Service Oriented Archi-tecture (SOA) domain and its goal is improving interoperability between components.As BAM needs to interact with other systems to receive event flow and ESB assists this interaction, there is a need to define a general framework to establish communication between them and... 

In this thesis, the dynamic analysis of the scratch drive micromotor will be investigated. Scratch drive micromotor consists of a rotational arrangement of the scratch drive actuators (SDAs). SDAs that are actuated by using electrostatic force are used in a wide range of applications in microelectromechanical systems (MEMS) due to their unique advantages such as large output force, long travel distance and high-precision step size. However implementing a physical model to describe the movement of the SDA is chalanging and little researches have been performed to model and analyse the SDAs, in porpuse of predicting the behavior of the SDA before final design and manufacturing. By reviewing... 

Improving the network structure is one of the most important challenges in network research. Improving network structure is performed in order to achieve various goals such as refining routing and robustness.
Having an eye on the structure of a real packet switched communication network as an example, we have tried to improve its performance in those regards by injecting a small number of edges to the network in this project. To reach this goal, we have analyzed the current approaches in approximation algorithms in theoretical computer science, methods currently used in analyzing complex networks and heuristics that are based on network structure. Comparing the advantages and... 

Unscented kalman filter is able to integrate strapdown inertial navigation system (SINS) and celestial navigation system (CNS) and estimate current attitude and gyro drift precisely. However, initial attitude error, accelerometer bias and attitude error caused by gyro drift prior to CNS setting to work may cause large errors in velocity and position. So a novel method is presented for compensating these errors. The proposed method implements Fixed-interval smoothing to the integrated system. The procedure of filtering, smoothing and accelerometer bias estimation has been explained in details. The validity of the designed method has been proved through a simulation which admits the capability... 

Making Decision about software architecture design is a multi-criteria problem which depends on different factors. One of the main problems in software architecture is the high cost and complexity of Decision making which is rooted in knowledge vaporiza-tion. In fact current developers of the system are not necessarily the primary designers of the architect. Thus, the system cannot be understood without the knowledge about the history of the architecture. Additionally, a good organization of knowledge will be helpful in terms of knowledge reuse and best practices which leads to low cost of architecture.Due to the importance of knowledge in software architecture, knowledge acquisition as well... 

In recent years, in addition to the stock market, a market has been created in Iran under the name of commodity exchange market. In this market, the product supplier announces some product specifications and buyers also announce their demand and bid price. The following two situations may occur: 1. The total amount of demand is less than or equal to the amount of supply.In this case all buyers receive the product at their bid price. Obviously, first all buyers announce a price lower than the base price so that if this happens, they can buy the required product at the lowest possible price. 2. If the supply is less than the demand, the market enters the competition. In this way, the new bid... 

Nowadays, prediction markets and decision markets are among the common methods for predicting future events. There are many studies on these markets and some models are developed for analyzing them. Score rule is a classic method that is used for many years for information elicitation in weather forecasting, economical predictions and predicting sport games’ results. In this thesis, a study on score rules, prediction and decision markets was conducted. These studies resulted in a new model for predicting the value of a variable in future. This model was designed as a proper score rule in its primary form. Then features which were discussed in this new literature were defined, and it was...