Using Fiber Bragg Grating as a Dispersion Compensator in Optical Transmission System Using Optisystem Software Simulator

Optical fiber is one of the most important communications media in communication system. Due to its versatile advantages and negligible transmission loss it is used in high speed data transmission. There are various types of optical fiber, the Fiber Bragg Grating (FBG) is commonly chosen as important components to compensate the dispersion in optical communication system. Because the low cost of filter for wavelength selection and low insertion loss, it has also customized reflection spectrum and wide bandwidth. The simulation of transmission system will be analyzed based on different parameters using OptiSystem simulator. By simulating a model of communication system and using the most suitable settings of the system which include input power, fiber cable length (km) and attenuation coefficient (dB/km) at cable section, there are three different parameters will be investigated, which are Signal power, Noise power, output power at receiver.

Performance Evaluation Of Link Quality Estimators In Wireless Sensor Networks Based On Collection Tree Routing Protocol

In this PAPER, we perform a study and extensive comparative between the well-known link quality estimators and CTP, a tree-based routing protocol provided by TinyOS for different network topology and simulate it using TOSSIM simulator to evaluate the performance of these estimators.

Experimental Study on Various Double Skin Façade Design within the Concept of Sustainability

The aim objectives of this study is, to determine the optimum distance for the cavity that can allow maximum light to pass through according to one of the criteria for assessing global sustainability, and to study the daylight characteristic of these double facade windows, In this research, it conducted numerous experiments to study the effect of doubling the facade design on the standard of sustainability (daylight factor) space studied.

Analytical Study of Resource Allocation Algorithms in Cloud Computing

In this thesis an analytical study is done on existing cloud resource allocation strategies and a comparative study summarize them on the basis of technique used and objective as well as their advantage and disadvantage.

security vulnerabilities analysis of Vehicular ad hoc networks and countermeasures

In this search, we provide a study about the security in VANET networks which are considered to be a part of mobile wireless networks and designed to work between moving vehicles. The most important security flaws of this networks and its applications are studied. In fact, we study the most important and dangerous attacks that may target VANET networks and analyze its main risks. Furthermore, we simulate some of these attacks Specifically Denial-of Service (DOS) attack using prober tools depending on chosen parameters that characterize the network performance. moreover, we provide some Security solutions to help counter measuring these attacks and minimize this effects, and Finally we apply these solutions and evaluate them.

Evaluating performance and reliability of AODV, ADV routing protocols in VANET environment using NCTUns 6.0 simulator

In this paper, we use NCTUns 6.0 to simulate this kind of networks ,because it is difficult to do that is the real world .In this paper, two routing protocols (AODV, ADV) are studied within many scenarios to achieve their performances and reliability using many metrics. We conclude that ADV routing protocol adapts quickly when the complexity of network and mobility of nodes increase. This is achieved by varying the size and frequency of routing updates.

Implementation and Performance Evaluation of Secure Zone Routing Protocol SZRP in Mobile ADHOC Networks Using Identity Based Cryptography

This paper focuses on securing zone routing protocol (ZRP) from one of the most possible attacks such as bogus route attack and black hole attack. This paper provides a solution against this attack using identity based cryptography(IBC), We implement, evaluate our proposal using NS-2 network Simulator.

Study of the Effect of Rainstorms Frequency on some Soil Water erosion under a Rain Simulator

The study aimedtoalertthe danger oferosionare three types ofsoilsexposedby calculatingthe amount ofsoilerodedfromthe impact ofthe Cascadefiverainstormsequalintensity, thosesoils, has been securedsoilsnecessaryfor the studyofseveral areas ofdifferent provincesin Syria, where he wasplaced in thebasin, thenoffered forrainstormsbymobile(Rainfall Simulation),andaftereveryrainstormwas recordedreadingsfor the loss ofsoilfromeachbasinrunoffandinfiltration. The results of thisstudy showedthe effectin terms oftexturesin thedrift, themoremechanicalgroupsdriftingin the threesoilsareprimarilysiltgroup, followed by the mudpack, thensand, and clay soilswith ahigh percentageofsiltmosterosionofclay soilswith alowpercentageofsilt, followed bysandyclayloamsoils, wherethe amount ofsoillostfromthe clay soilreachedwith a high contentofsilt147.7t/ h/y, andthe lowclaycontentofsilt118.5t/ h/y, while the soilwithtexturesLummisandyclay, reaching 90.5t / h/y.And soil erosion that attaches primarily by college carbonates then dispersion ratio of organic matter and then finally percentage silt.

Building a simulator for Superscalar processors and Vector processors and comparing their performance in processing parallelism at data level

This paper presents parallel computers architectures especially Superscalar processors and Vector processors, building a simulator depending on the basic characteristics for each architecture, the simulator simulates their mechanism of work programmatically at the aim of comparing the performance of the two architectures in executing Data Level Parallelism (DLP) and Instruction Level Parallelism ILP. The results shows that the effectiveness of executing instructions in parallel depends significantly on choosing the appropriate architecture for execution, according to the type of parallelism that can be applied to instructions, and the vector features in the vector architecture achieve remarkable improvement in performance that cannot be ignored in execution of DLP, simplify the code and reduce the number of instruction. The provided simulator is a good core that can be developed and modified especially in the field of education for the students of Computer Science and Engineering and the research field.