Al-Iraqia Journal for Scientific Engineering Research

A Dual band Filter block has been highly attention due to its highly importance in wireless communication systems. High frequency level normally companies with the performance of filter block. The use of both low-pass or band-stop filter and the step-impedance lines methods to reduce the spurious characteristics of the filter are not a practical solution since that adds more complexity and large in size. The proposed microstrip filter was utilized for Industrial Scientific and Medical (ISM) applications (2.45 GHz) with -25 dB with twice transmission zeroes as a first band while the second band of (3.5-8 GHz) for LTE and wireless LAN applications with return loss up-to -15 dB. (CST) Computer Simulation Technology was used to simulate the declared structure. The dual band, mode simulation results have been extracted and also compared with the literature that get closed to each other. So that, the computer aided design gives a good pointer to adopt an extracting result that have been obtained using the aforementioned simulator.

Bluetooth can be described as a wireless connection used for transferring data from ten to one hundred meters distance with transfer speed around 720kbps. The current validated Bluetooth network process, consists of four stages, key generations for launching key, link key, combining and encrypting key has been included. Small authenticated process will be needed due to the limitation of resources that Bluetooth equipments own. A new authenticated scheme has been suggested for the net of the Bluetooth. Diffie-Hellman Algorithm was used to enhance the authentication process of Bluetooth. This creative authentication process eliminates the effect of the SNARF attacks which stem from the preface of Diffie Hellman algorithm.

Numerical investigations were done on a flat plate in order to predict the flow behavior, vortex type, and vortex generated at holes and holes downstream area, and the interaction between hot mainstream and coolant jet. Two type of singular coolant air jet were studied; the first jet hole inclined at 30º in the direction of hot air stream. The second holes are lying in the opposite direction at 30º. All simulation were conducted at blowing ratio of 0.5 and 1.5, the diameter of cooling hole is 4mm. The commercial CFD software FLUENT with standard turbulent models was applied. The results showed that there are two large vortices have been detected, large counter rotating vortex pair generated from the hole rims and horseshoe vortices, both vortices have major effects on cooling performance. The results also showed that the reverse flow from backward injection hole creates pair of vortex similar to the kidney vortex created from forward injection hole, but in a plane parallel to the main stream.

This study developed the modified equivalent frame method, using column elements and equivalent slab-beamelements for two-way slab systems under lateral loads. A detailed comparative study between the F.E analysis (which is based on the three dimensional full width of slab) and 3D frame analysis using different types of effective moment of inertia of beam-slab section. The purpose of this step is to choose an appropriate model of effective width of slab to represent the full width of slab under lateral loads. The dynamic analysis was done using finite element procedure provided by ETABS 2013.Parametric studies were carried out to evaluate the effects of several factors such as panel of slab aspect ratio, column aspect ratio, column to span ratio, irregularity in plan of buildings and height of buildings. Two heights of buildings were considered for those abovementioned factors, these are (45m and 75m).This study presents the modified beam model, which gives the effective moment inertia of slab-beam system under lateral load. The response of the proposed model gives a good result in comparison with F.E idealization with small error range from(2-5)% for displacement and frequency.(5-8)% for base shear and base moment

In traditional networks, switches and routers are very expensive, complex, and inflexible because forwarding and handling of packets are in the same device. However, Software Defined Networking (SDN) makes networks design more flexible, cheaper, and programmable because it separates the control plane from the data plane. SDN gives administrators of networks more flexibility to handle the whole network by using one device which is the controller. Unfortunately, SDN faces a lot of security problems that may severely affect the network operations if not properly addressed. Controllers of SDN and their communications may be subjected to different types of attacks. DDoS attacks on the SDN controller can bring the network down. In this research, we studied effectiveness of sequential probability ratio method in identifying the compromised switched interface and detecting Distributed Denial of services (DDoS) attacks that are targeted the controller of Software Defined Network (SDN). We implemented the detection method and evaluated the performance of the method using publicly available DARPA datasets. Finally, we found that SPRT has the highest accuracy and F score and detect almost all DDoS attacks without producing false positive and false negative

E-learning system implies skill and knowledge transference in a computerized and networking-based way. Technologies have started to create a difference in education. Accordingly, many universities have adopted learning management system (LMS) to enhance both teaching and learning processes. Mostly, LMS is used in student registration, the delivery and tracking of e-learning courses and content, and in testing as well. However, building such a learning system might lead to encounter certain issues related to scalability, management, and security. The proposed network design has been set to solve such problems. Basically, to manage the accounts’ accessibility and privileges, the domain controller server has been used. Network segmentation is proposed to separate the network into multiple broadcast domains to avoid problems related to broadcast like that of a broadcast storm. Lastly, to achieve the scalability, VPN secured tunnels are used to connect several far distance sites through the Internet

This research paper presented a method for controlling the Armdroid. The method is developed to control the Armdroid for picking an object that lay on a surface plane using webcam sensor. The optical camera is used to feed the system continuously with sequence of images which convey the needed pictorial data for allocating the target position. The system is designed to accomplish the tasks required to carry the object and move it to the desired location. The transformation of target position from pictorial coordinate system to real word coordinates was accomplished using 2ndorder polynomial transformation to translate the object position from image to real world position. The computation of angles of the robot arm segments is done continually to assure short maneuver route for moving the object. The style of movement is by issuing sequentially the proper commands for moving each segment individually such that a smooth movement is achieved. The conducted results indicated a well movement performance is attained

License plate recognition (LPRT) in Smart Street is one of the most important technique in our daily life due its highly security and economic efficiency system. This system is plays a vital role in security applications which include road traffic monitoring, street activity monitoring, identification of potential threats, and so on. Beside to the integrates system technologies which is to control energy efficient of the LED streetlights to turn on only when needed and to remain in a dim state otherwise.Paper targets is to detect and recognize license plates from image in a real time. This will help to identify and register vehicles and provide the reference for further vehicle tracking and activity analysis. license plate detection approach has two major steps. First, extract a certain features which encode by the image. Second, develop a matching networkthatdecide wither the car should be pass or not.Another key requirement for the network is to have low set up and maintenance costs by using a smart LED street lighting which is a direct objective of this project.This project mainly introduced by using IR sensors for turning the light on & off. Morphological operations, Edge detection techniques and numbers segmentation have been usedfor plate localization characters. This characters and numbers was extract and match with a stored data base in the recognition process. Experiment results was accomplished and reviewed using Matlab program, Arduino microprocessor and theirconnections tools