Cihan University-Erbil Scientific Journal <p>Cihan University-Erbil Scientific journal (CUESJ) is a biannual academic journal published by the Cihan University-Erbil. CUESJ a periodical journal publishes original researches in all areas of Science, Engineering and Technology. CUESJ is a Peer-Reviewed Open Access journal with Creative Commons Attribution Non-Commercial No Derivatives License 4.0 (CC BY-NC-ND 4.0). CUESJ provides immediate, worldwide, barrier-free access to the full text of research articles without requiring a subscription to the journal, and has no article processing charge (APC). CUESJ applies the highest standards to everything it does and adopts IEEE citation/referencing style. CUESJ Section Policy includes three types of publications; Articles, Review Articles, and Letters. CUESJ is a member of the ROAD with print-ISSN: 2519-6979 and a member of the Crossref a doi: 10.24086/issn.2519-6979</p> en-US <p>Authors who publish with this journal agree to the following terms:<br>1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License [CC BY-NC-ND 4.0] that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.<br>2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.<br>3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).</p> (Cihan University-Erbil Journal) (Prof. Salah I. Yhaya) Sun, 30 Jun 2019 00:00:00 +0000 OJS 60 Design and Simulation of Worldwide Interoperability for Microwave Access Computer Network for 3×3 Km Universal Sample of Building Campus <p>The aim of this study to design a wireless computer network of a particular network as a large-scale company or university to improve&nbsp;mobility and to let the teachers and students of the university, for example, stay interacted and connected at any time in any campus&nbsp;location or site. Therefore, This study needed to cover the overall area of this campus with efficient wireless coverage that exceeds the&nbsp;university boundaries to maintain wireless signal strength. To do that, the researchers thought that it is very significant to design a&nbsp;Worldwide Interoperability for Microwave Access (WiMax) computer network with the most powerful and advanced hardware component&nbsp;capabilities to full fit teachers’ and students’ requirements of fast net browsing and files’ download. After designing the university campus&nbsp;of computer network, simulation has done by OPNET 14 Modular to determine the WiMax network design parameters. The purpose&nbsp;of the current research is to find if the design of the campus network is efficient or not and also to determine the performance of the<br>implemented network.</p> Ammar O. Hasan, Firas Muhammad Zeki Mahmood ##submission.copyrightStatement## Mon, 13 May 2019 00:00:00 +0000 Improving the Level of Service of a Portion of 60-M Ring-Road in Erbil City <p>This study aims to implement the factors that can improve the level of service of 60-M Ring-Road in Erbil, Kurdistan Region of Iraq. These factors are minimizing the traffic volume, providing a higher quality pavement, widening the road carriageway, and constructing bridges. The main objective of this paper is to increase the LOS of a specific road known as 60-m ring road from New City Mall to PAR hospital in Erbil city. For this purpose, the data on speed and traffic flow are collected using video camera to collect data to be reasonably analyzed with respect to the speed of the vehicles and set the LOS for the proposed road. The result shows that average speed in this study is 19 km/h, and this confirms that the LOS in this particular road segment is at F category. In addition, the calculated peak hour factor is 0.97 which is more than a typical value in urban area. Finally, the study revealed that the traffic volume on this specified road is too high.</p> Dlzar B. Qadr, Shorsh A. Mohammed, Ibrahim A. Hasan, Rawand F. Mohammed Ali ##submission.copyrightStatement## Mon, 13 May 2019 00:00:00 +0000 Evaluation of Construction Delay of Public Projects in Erbil Governorate <p>Delay is one of the greatest challenges facing the implementation of construction projects. The completion project time is considered one of the measure indicators for assessing the success of any project. Delays usually have negative impacts of financial and social to all parties involved in the projects. The aim of the study is to find the most important causes of delay by evaluating the common causes of delays in terms of frequency, severity, and important indices in implementation of public construction projects in Erbil Governorate related to owners, contractors, consultants, and external factors. The data gathered through conducting a questionnaire for perception various parties involved in implementation of public construction projects. For these purpose, 104 forms of questionnaire were distributed to various parts to identify the delay causes in accordance with their opinions. It was concluded that the most significant factors causing the delay in construction of public project in Erbil Governorate related to the owner were “variation orders by owner during the construction” which came in the first rank, while the cause of delay related to the consultant that came in the first rank was “unclear and inadequate details in drawings,” whereas the factor related to the contractor which came in the first rank was “selecting incompetent contractor.”</p> Noori Sadeq Ali, Khalil Ismail Wali ##submission.copyrightStatement## Mon, 13 May 2019 00:00:00 +0000 Cooperating Newton’s Method with Series Solution Method for Solving System of Linear Mixed Volterra-Fredholm Integral Equation of the Second Kind <p>In this paper, for the 1st time, we use Newton’s method with series solution method (SSM) for solving system of linear mixed Volterra-Fredholm integral equations of the second kind (SLMVFIE-2). In this work, we use a new technique for studying the numerical solutions for SLMVFIE-2 which is Newton’s method with SSM, first solving this system using SSM and after that cooperation Newton’s method with SSM, suggesting an algorithm for the technique. The new results are achieved and some new theorems have proved for convergence of the method, several numerical examples are tested for illustrating the usefulness of the technique; the numerical results are obtained and compared with the exact solution, computing the least square error, and running times which are criterion of discussion. For programming the technique, we use general Matlab program.</p> Talaat I. Hasan ##submission.copyrightStatement## Mon, 13 May 2019 00:00:00 +0000 Sediment Yield Problems in Khassa Chai Watershed Using Hydrologic Models <p>Upland erosion and sedimentation are one of the severe problems which faces dams as sediments occupy spaces within reservoirs storage, hence, decreasing live water storage which is the main purpose of dam’s construction. Iraq is one of the countries that will face a significant shortage of water income as a result of both the increment in water demand and of the reduction of water shares from the source countries. Thus, the existing dams in Iraq represent a strategic resource to fulfill water demands, and the sedimentation at these dams is studied to assess the quantity of sediments that reach to these reservoirs and decrease available water volume and useful life of reservoir. In the current study, Khassa Chai Dam is located in the Northeast of Iraq and its main watershed basin covers an area of about 412 km2 between Kirkuk and Al Sulaymaniyah Governorates has been selected to estimate and predict the amount of sediment yield based on 30 years of daily climate data and the events of different intensity rainstorms. Automated geospatial watershed assessment (AGWA) tool model has been used to simulate Khassa Chai Dam catchment area. This model utilizes the geographic information system (GIS) application to analyze the required data from GIS layer for digital elevation model, soil type, land use, and land cover by interference with the required climate data. The key components of AGWA model are the soil and water assessment tool model and kinematic runoff and erosion (KINEROS) model which are able to simulate complex watershed behavior to explicitly account for spatial variability of soils, rainfall distribution patterns, and vegetation. The hydrologic characteristics for Khassa Chai catchment area according to the SWAT outputs show that the most erosive sub-basins are not able to deliver the eroded material or sediments to the reservoir due to their transmission losses, percolation, and other minor obstacles. KINEROS model simulation for sediment yield is much closer to the behavior of Khassa Chai watershed in erosion and sediment transport according to the single storm events and for individually selected sub-watersheds which are closed in their location to reservoir inlet.</p> Mahmoud I. Mahmoud, Mustafa N. Kasim ##submission.copyrightStatement## Mon, 13 May 2019 00:00:00 +0000 Prediction the Groundwater Depth using Kriging Method and Bayesian Kalman Filter Approach in Erbil Governorate <p>The aim of this research is using the kriging method as one of geostatistics interpolation methods on the measured value of the specific part&nbsp;and Bayesian Kalman filter to identifying the depth of Groundwater in Erbil. Geostatistics is a tool which is developed for statistical analysis&nbsp;of any continuous data that can be measured at any location in the space. The Kalman filter is the Bayesian optimum solution to the problem&nbsp;of estimating the unknown state of a dynamic system from noisy data and is more efficient than computing the estimate directly from the&nbsp;entire past observed data. The main goal of this work is to predict anew value at the unmeasured location by kriging method and Bayesian&nbsp;Kalman filter and compare these two methods. The dataset is the observed values of the (295) wells that had been taken from a known&nbsp;specific place which called Shaqlawa – in Erbil Governorate. The comparison was done by calculating mean absolute error (MAE) and root&nbsp;mean square error (RMSE) for the value of the depth of groundwater in the eara of the study. The values of (MAE and RMSE) of each models&nbsp;are compared and the smaller values of them are the better interpolation as it shown in analyzing to evaluate the precision of the prediction.</p> Kurdistan Ibrahim Mawlood, Paree Khan Aabdulla Omer ##submission.copyrightStatement## Sun, 30 Jun 2019 00:00:00 +0000