The study of annual damage statistics due to floods in Iran and the world shows the extent of flood damage to natural and human resources in different regions. Determining the flood zone of rivers in order to protect national resources and reduce flood damage provides the possibility of protecting the river from encroachment and the construction of any unauthorized facilities in it. Therefore, in the present study, the capability of numerical models in simulating the flood zone of rivers was evaluated in the range of Azarshahr Qushqura river and the two-dimensional hydraulic model HEC-RAS 5.0.7 and one-dimensional HEC-RAS model were compared. Changes in the hydraulic characteristics of the flood flow including depth and velocity of the flow at different cross sections of the models were evaluated. The results showed that the water surface level (flow depth) of the two-dimensional model HEC-RAS compared to the one-dimensional model had the lowest error as compared to other hydraulic parameters of flood flow. The two-dimensional HEC-RAS model showed the highest error rate in the flow velocity parameter in comparison to the one-dimensional model. The results indicated that two-dimensional HEC-RAS model V5.0.7 determined the surface of the flood zone 12.46 % more than the one-dimensional HEC-RAS model. The confirmation of the resulting zones on the current state of the river and comparison with the river aerial photo of 1346 indicated the higher accuracy of the two-dimensional HEC-RAS model in estimating the flood zone of the river.

The purpose of present research work is to study the hydraulic properties of River Simineh and its process using HEC-RAS model, in a combination with ArcGIS software using HEC-GeoRAS extension to simulate the hydraulic parameters of river having a catchment area of 3726 km2. For that mean, since multi-dimensional models require long time and high cost in river bends, by using a combination of satellite images and HEC-RAS model a multi-dimensional simulation was prepared. Among those, 58 cross-sections are considered along the river lane that main data required in this research are elevation maps, satellite images, boundary conditions and River Simineh hydrometric stations. The results showed that at the upstream of river, the discharge was 316.3 m3/s and water level was 12.85 m, and at the downstream the flow rate and water level are 313.6 m3/s and 11.52 m, respectively. On the other side of the river bend, the water level variation is around 50 cm and the flow velocity is directly proportion to a distance from the river bank; so that the maximum flow velocity of 2.2 m/s occurred at a distance nearby 1.5 m. To verifying the model, a statistical parameter of NSE coefficient for the water level and flow depth were 0.805 and 0.845, respectively; which shows the accuracy of model. Those results indicate a high accuracy of HEC-RAS model in hydraulic simulation of River Simineh flow. Also, simulations prepared in GIS background have significant impacts on the accuracy of outputs

Software architecture is known to be an e, ective tool with regards to improving software quality attributes. Many quality attributes such as maintainability are architecture dependent, and as such, using an appropriate architecture is essential in providing a sound foundation for the development of highly maintainable software systems. An e, ective way to produce a well-built architecture is to utilize standard architectural patterns. Although the use of a particular architectural pattern cannot have a preserving e, ect on software maintainability, the mere conformance of a system to any architecture cannot guarantee the system's high maintainability. The use of an inappropriate architecture can seriously undermine software maintainability at lower levels. In this article, the e, ect of standard architectural patterns on software maintainability quality attributes is investigated. We develop a quality model for maintainability quality attributes, which is later used to compare various standard architectural patterns. We , nish by investigating two real-world experiences regarding the application of a particular pattern to two di, erent existing architectures, exploring the e, ect of the change in architecture on maintainability quality attributes.

In some cases, software companies condition the sale of computer software on acquiring hardware components or integrate computer softWare with complementary software and hardware when designing products. Complementary software and hardware must be interoperable in terms of functionality. The specifi c nature of computer software causes network effects and mass production savings in software industry. The majority of software right abuse arises when the developer conditions licensing a software on the complementary software and hardware that makes it impossible to buy these products independently. Such condition in license agreements of computer software violates U. S antitrust laws provided that the developer has tied independent products and the seller has essential market power in the created products market. This condition has different competitive effects. In the Iranian law, the Act on the implementation of article 44 of the constitution which has stated the basic rules of competition, has not dealt with the issue perfectly and there are provisions in the Act on computer software developers and its by-law on interoperability. Given the absence of independent studies in this field, analysis of rules can lead to clarification of the subject.

This article introduces MarcEdit software. MarcEdit is a metadata editing software suite used primarily to create and manipulate MARC records. Originally developed by Terry Reese in 1999 for a major database cleanup project at Oregon State University. MarcEdit is a metadata editor: a suite of tools designed around the specific types of metadata currently in use by libraries. The tool has grown to include the capacity to create, edit, and transform much of the non-MARC metadata used by libraries. This article attempts to show some of the important features of this software.

Satellite software is a kind of application that are exposed to soft-errors or transient faults because they work in an environment, which is full of radiations. This kind of fault has caused error in the execution of software. Satellite designers have used different methods, such as hardware shielding and component hardening, for removing the effects of this type of errors. These methods will increase the cost, weight and power consumption. Also, these methods decrease the performance. Recently, researches have shown that instead of spatial components,, COTS components can be used in LEO satellites. In addition, software implemented hardware fault tolerance (SIHFT) techniques can be added to these components for dealing with transient faults. In this paper, a branch of these techniques, which is called control flow based techniques, are investigated and the useful method among them is highlighted. The result of the implementation, testing and evaluation of the selected method (i.e. RSCFC) is also presented in this paper.