Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501PERFORMANCE OF EXTERNAL REINFORCED CONCRETE BEAM-COLUMN JOINTS MADE OF HIGH STRENGTH CONCRETE48549612756310.21608/jesaun.2011.127563ENRamadan M. A.Eng.at Qune govnovateM. M. AhmedAssociate professor , Civil Eng. Department, Assiut University,Abdel-Mageed M. AAssociate professor , Civil Eng. Department, Assiut University,A. MegahidProfessor , Civil Eng. Department, Assiut University,Journal Article20110127The integrity of beam-column joints in reinforced concrete (RC) frames,<br />especially in a crucial zone, is essential for the satisfactory performance<br />of the whole structure. Therefore, the behavior of external connections<br />between beams and columns is a significant parameter affecting the<br />performance of such R.C frames. An important influence in this regard is<br />the concrete compressive strength, joint reinforcement and relative<br />stiffness of beam and column in each connection, which is itself<br />determined by considerations of geometry and reinforcement percentage.<br />To contribute to a better understanding of the behavior of external beamcolumn<br />joints made of high strength concrete a theoretical study based<br />on the Non-linear finite element analysis is usually appropriate. ANSYS<br />10[17] software package was used to perform the analysis using the<br />available Solid 65 3-D reinforced concrete element with reinforcing<br />bars. 26 specimens were considered and analyzed. The main parameters<br />were, the details, type and amount of joint reinforcement, the type and<br />amount of beam and column main reinforcement in the joint, the level of<br />axial column load and the concrete strength .The Obtained results were<br />analyzed and discussed. The results were also compared with the<br />obtained results using some available formulae found in the literature.<br />Finally beneficial conclusions and some design recommendations were<br />outlined and given.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501IMPACT ON UNDERGROUND DEEP FOUNDATION EXCAVATION FROM ADJACENT CHANNELS DURING EARTHQUAKE49751112757510.21608/jesaun.2011.127575ENAhmed Abd El-RaheemFarghalyLecturer, Faculty of Industrial Education, Sohag UniversityJournal Article20110320One of the most important factors affecting the design of the structures is<br />the impact of the earthquake loadings on the forces and the design<br />displacements. Nevertheless, the influences of the near structures from<br />the existing channels, that sometimes can cause great changes in forces<br />and displacements, can never be neglected. Therefore, the induced<br />displacement due to the adjacent channels of constructed buildings<br />foundations has been investigated in this study. Having the results of the<br />study, it can be evaluated, whether the amounts of variations in forces<br />and displacements are in the allowable ranges, and what measures and<br />precautions are needed to save the structures in case of having excess<br />changes in these parameters. In this paper, the site characteristics of<br />buildings foundations are first investigated. Then the excavation of the<br />building is modeled, while the adjacent channels are taken into account.<br />Finally, the impact of the excavation on the adjacent structures under<br />earthquake loadings is studied and investigated. The accelerograph of El<br />Centro earthquake has been used for seismic analyses and fifteen stories<br />buildings have been modeled as well as the adjacent channels.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501POTENTIAL OF USING HIGH RESOLUTION SATELLITE IMAGES FOR MAPPING APPLICATIONS51352812757710.21608/jesaun.2011.127577ENA. M. AbdelwahedCivil Engineering Dept., Faculty of Eng., Assiut University, EGYPTF. A. FarragCivil Engineering Dept., Faculty of Eng., Assiut University, EGYPTA. AbdelhafizCivil Engineering Dept., Faculty of Eng., Assiut University, EGYPTM. A. BesheerCivil Engineering Dept., Faculty of Eng., Aljouf University, KSAJournal Article20110326Cities and villages in Egypt are subjected to rapid growth. Growth can<br />be beneficial economically, but it also has significant effects on the<br />environment, and if it is left unchecked can have negative impacts. Rapid<br />population increase led to replace agriculture land by buildings, roads<br />and highways. The changes are in particularly harmful when urban<br />expansion occurs against surrounding agricultural areas. So the<br />expansion of cities and villages must be monitored. Recent developments<br />in remote sensing enable us to use high resolution satellite images for<br />different purposes. One of the main application fields for remotely<br />sensed data is the large-scale topographic mapping and map revisions,<br />for which it is necessary to detect and extract features from such<br />imagery. The high resolution space images available now from IKONOS<br />and Quick Bird do have a resolution which is partially in competition to<br />aerial images. This paper presents an evaluation of using IKONOS<br />satellite images for large scale mapping purpose. This evaluation has<br />two elements, the first is geometric potential and the second is the<br />information contents. The results of this study show that correcting<br />IKONOS imagery using one or two Ground Control Points (GCPs) gives<br />about 1.6m horizontal accuracy, higher accuracy can be obtained using<br />more GCPs. The feature extraction is performed by manual on screen<br />digitizing. The results are verified against a 1:25000 topographic map,<br />features such as roads and canals can be extracted with about 70-99%<br />accuracy.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501EVALUATION OF INFORMATION CONTENT AND FEATURE EXTRACTION CAPABILITY FROM EGYPT SAT 1 IMAGE52953812758010.21608/jesaun.2011.127580ENAbdelaal M. Abd ElwahedCivil Eng. Dpt. Faculty of Engineering, Assiut University.Farrag A. FarragCivil Eng. Dpt. Faculty of Engineering, Aljouf University, KSA.Yasser G. MostafaCivil Eng. Dpt. Faculty of Engineering, Sohag University0000-0003-4789-5705Journal Article20110327Maps are fast and accurate information sources when it is required, to<br />study and to develop projects in any region. In Egypt, many of the<br />available maps are in an unsatisfactory scale and not updated. The<br />availability of Egypt Sat1 satellite images, opened new possibilities for<br />mapping and map updating. Egypt Sat1 is the first Egyptian earth<br />observation satellite which was successfully put in orbit in 2007. It<br />captures both multi-spectral and panchromatic images with resolution of<br />7.8 meters. The main objective of this study is to evaluate the potentials<br />of information content in Egypt Sat1 images for extracting features in<br />the context of updating of 1:25,000 topographic maps and to ascertain<br />what features could be identified and mapped using visual interpretation<br />techniques supported by supplementary data.<br />Data used in this study are an image from Egypt Sat1satellite captured<br />in 2009 and a topographic map, dated 1991, at scale 1:25,000 of the<br />region of Assiut city and the surrounding. The investigation in Egypt<br />Sat1 data focused on identification of urban features such as roads,<br />railways, watercourses, bridges and boundaries of urban areas. ERDAS<br />imagine 9.2 software was utilized, where qualitative and quantitative<br />evaluations were performed for the informative content. The research<br />results point to the potential of Egypt Sat1 images as a low cost<br />alternative data source with field verification for the updating of<br />topographic maps at scale 1:25,000.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501EFFECT OF TYPE OF FIBER ON THE MECHANICAL PROPERTIES OF HIGH STRENGTH CONCRETE (HSC)53954712758210.21608/jesaun.2011.127582ENR. A. S. MohamedAssociate Professor, Civil Engineering Dept., Faculty of Engineering,
El-Minia, Egypt.Journal Article20110416High strength concrete (HSC) has been widely applied worldwide, in<br />recent years, due to its favorable strength and dense microstructures.<br />HSC shows some characteristic and engineering properties different from<br />those of normal strength concrete even they utilize similar raw materials.<br />Great use of the HSC is found in application where durability is<br />important as high way bridge decks, parking structures, industrial,<br />facilities and off-shore structures special structure such as high rise<br />building and bridges with very long span would not have been possible<br />without the development of HSC. However, the applications of HSC are<br />still hindered by its relative brittleness or lack of ductility such a<br />drawback can be overcome by the addition of discontinuous fibers.<br />The present work investigates the effect of addition of two types of fibers<br />with different ratios; pure polypropylene and steel fibers to high strength<br />concrete in order to diminish some poor performances particularly in<br />case of tensile strength. The effect of the addition of the two types of<br />fibers on the mechanical properties of HSC is studied. The polypropylene<br />fibers and the steel fibers were added at concentration of 0.0, 0.25, 0.5<br />and 1.0% by volume. Compression and bending tests were carried out to<br />determine the mechanical properties such as maximum compressive<br />strength, modulus of elasticity, splitting strength and modulus of rupture.<br />On the basis of the experimental results, it can be concluded that,<br />addition of fibers either steel or polypropylene to HSC mixes slightly<br />increases the modulus of rapture 0.5% of polypropylene improves the<br />modulus of rapture by 10% while the same value of steel fibers increases<br />it by 15%. Meanwhile, the polypropylene fibers have no influence in the<br />value of the calculated modulus of elasticity. However, steel fibers<br />increases the modulus of elasticity by about 28%.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501DECISION SUPPORT SYSTEM FOR COMPREHENSIVE APPRAISAL OF COASTAL RESORT PROJECTS IN JEDDAH54956412758310.21608/jesaun.2011.127583ENMohammad Abdul RahmanKattanProject Director for Girls Faculties, King Abdul Aziz University,
Kingdom of Saudi ArabiaMahmoud A. TahaAssociate Professor, Civil Engineering Department, Construction
Management Program, King Abdul Aziz University, on leave from
Structural Engineering Department, Cairo University, Egypt.Abdullah MostafaMohorjyProfessor of Water Resources & Environmental Engineering, King
Abdul Aziz University, Kingdom of Saudi ArabiaJournal Article20110507Project evaluation has to consider financial and environmental impacts<br />including human, physical and ecological. Currently, the evaluation process in<br />the city of Jeddah, Kingdom of Saudi Arabia (KSA), does not take all these<br />impacts into consideration despite the issuance of the general environmental<br />regulations in 2001 that necessitate the implementation of an Environmental<br />Impact Assessment (EIA) studies at the feasibility stage of projects, which<br />might cause adverse effects on environment.<br />The main objective of this research is to develop a Decision Support System<br />(DSS) that integrates these impacts into one model to evaluate coastal resort<br />projects along Red Sea coast at feasibility stage.<br />The proposed system is composed of two main components, the environmental<br />and the financial assessment. First, the system assesses the environmental<br />impacts of the project using fuzzy logic technique by calculating the Decision<br />Making Coefficient (DMC). The DMC value is compared to the baseline of the<br />city of Jeddah, which is developed in this research. Those projects that have<br />DMC values greater than the baseline of Jeddah, suitable mitigation measures<br />should be proposed to eliminate their adverse environmental impacts. Second,<br />the system evaluates financially the projects that have no adverse<br />environmental impacts by calculating Net Present Value (NPV), Internal Rate<br />of Return (IRR), Payback Period (PBP), Profitability Index (PI), Debt Service<br />Coverage Ratio (DSCR), and Mitigation Cost/Project Cost (MC/PC).<br />The system is validated using three existing coastal resort projects in the city of<br />Jeddah. The validation results showed that the three case study projects were<br />environmentally and financially feasible.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501VIBRATION ANALYSIS OF CENTRIFUGAL PUMP WITH VARIABLE SPEED DRIVES56557912766310.21608/jesaun.2011.127663ENSobhy, M. GhoneamProfessor, Department of Production &
Design Engineering, Faculty of Engineering, Menoufia University,Samir, M. Abdel-RahmanAssociate Professor, Mechanical &
Electrical Research Institute, National Water Research CenterDalia, M. El–Gazzar,Researcher Assistant, Mechanical & Electrical
Research Institute, National Water Research Center,Journal Article20110402Variable speed drives (VSD) improve operation and performance of<br />pumping system and allowing them to operate efficiently, match<br />fluctuations in the water demand and hence saving energy over the<br />required range of field operation. Variation of speed may considerably<br />lead to coinciding of stationary speed with the critical speed. For VSD<br />applications, the excitation frequencies become variable and the likelihood<br />of encountering a resonance condition within the continuous operating<br />speed range is greatly increased. Vibration tests were done to obtain the<br />optimum Dynamic performance and its sensitivity due to speed variation.<br />The present work was done on a test rig of a centrifugal pump unit with a<br />variable speed drive. Forced vibration measurements were done at<br />different operating speed ranged from 25 Hz to 50 Hz to determine<br />vibration levels and exciting frequencies. Experimental modal testing was<br />done at different conditions to simulate the design and installation cases.<br />Operational modal analysis is done to simulate the actual operating<br />conditions. Dangerous frequencies are well determined to avoid operation<br />at resonance. Finite element model was done using ANSYS software to<br />obtain the dynamic characteristics of the pump model analytically.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501DEVELOPMENT OF COMPUTER VISION ALGORITHMS FOR MEASUREMENT AND INSPECTION OF EXTERNAL SCREW THREADS58160512766610.21608/jesaun.2011.127666ENE.S. GadelmawlaAssociate Professor, Mechanical Engineering Department, College of
Engineering, Qassim University, Buridah 25415, Qassim, Saudi ArabiaJournal Article20110405The current methods of measuring screw threads are either time<br />consuming or expensive. In addition, no single measurement method is<br />available and capable of accurately measuring all screw thread features<br />while significantly reducing the measurement time. This paper<br />introduces a vision system for automatic measurement and inspection of<br />most types of screw threads. Many image processing and computer<br />vision algorithms have been developed to analyze the captured images of<br />screw threads and perform the measurement and inspection processes.<br />Most of the common screw thread features (18 features) could be<br />measured by the introduced vision system. The system has been<br />calibrated for both imperial and metric units and was verified by<br />measuring a standard ISO metric thread plug gage and comparing the<br />results of the measurements with the standard values. The results showed<br />that the maximum difference between the standard and measured values<br />was ±5.4 m, which provide a good accuracy for measurement.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501SECUIRTY USING THE EFFICIENT PUBLIC KEY ENCRYPTION WITH KEYWORD SEARCH SYSTEM60762412765410.21608/jesaun.2011.127654ENB. MORGANM. HAMADAAssistance Professor, Communication and Electronics Department, Helwan UniversityG. ABDELFADELProfessor, Communication and Electronics Department, Helwan University.Journal Article20110118Efficient Public key encryption with key word search (EPEKS) enables<br />user Alice to send a secret key to a server that will enable the server to<br />locate all encrypted messages containing the keyword, but learn nothing<br />else. We have already published a previous paper explaining this scheme<br />the Efficient Public Key Encryption with Keyword Search (EPEKS). In<br />this paper, we focused on the relationship between the security and<br />(EPEKS). Firstly we briefly review the construction of this scheme<br />(EPEKS). (EPEKS) doesn’t base on Identity Based Encryption or pairing<br />which was used in the construction of the (PEKS) that proposed in<br />Boneh’s paper and other papers; it is based on Public Key Cryptosystem.<br />Secondly, we explained and compared between previous published<br />papers and clarified the relationship between security and (EPEKS).<br />Finally, we mentioned the encryption mechanisms regarding the system.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501BEYOND BAND LIMITED SAMPLING IN SUPER RESOLUTION APPLICATIONS – 60 YEARS AFTER SHANNON62563512765910.21608/jesaun.2011.127659ENGamal FahmyJournal Article20110220limited 60 years after the well known Shannon-Nyquist sampling theory. We consider the sampling process of several signals that were not exactly considered or treated by Shannon. We can call them non band limited signals. Research in sampling of non band limited signals is divided into two main categories. Signals that are sensed using modern state of the art compressive sensing techniques, and signals with a finite number of degrees of freedom that are sensed through sampling kernels that are physically realizable. These latter types of signals are typically called signals with finite rate of innovation. We present our results with these two main categories with different images and signals. Illustrative examples of the proposed techniques are presented.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501OPERATION OF HYBRID WIND FARM BASED ON SCIG AND DFIG UNDER GUST WIND SPEED63764812766210.21608/jesaun.2011.127662ENOmar NoureldeenElectrical Engineering Department, Faculty of Engineering, Qena, South
Valley University, EgyptM. A. AbdelwahabElectrical Engineering Department, Faculty of Engineering, Menia
University, EgyptAhmed RashadRural Electrification Authority in Egypt (REA)Journal Article20110421The continuous increasing in the pollution level and in the same time<br />increasing in fuel price are factors which lead to the increase in using<br />renewable energy sources specially wind energy. Wind energy faces many<br />challenges, one of the important challenges is that of the rapidly change in<br />wind speed which depends on the weather condition. A change in wind<br />speed affects on the generated power from wind turbine. SCIG and DFIG<br />are famous kinds of wind turbine, Each of them has advantage and<br />disadvantage, SCIG is cheap but its operation has a great effect on system<br />stability, especially when it operates without static synchronous<br />compensator. DFIG keeps the system stable but it is very expensive.<br />Therefore, it's necessary to examine the response of different wind turbine<br />generators variation of gust wind speed. This paper investigates the ability<br />of hybrid wind farm which consists of SCIG and DFIG to operate without<br />static synchronous compensator under gust wind speed condition. The<br />gust wind speed is simulated according to the International<br />Electrotechnical Commission IEC 61400.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501FLOTATION BEHAVIOR OF SUDANESE CHROMITE ORES64966112766710.21608/jesaun.2011.127667ENA. A .S* Seifelnassr,Professor in Suez Canal University, Faculty of Petroleum and Mining
EngineeringT. A. K TamamLecturer in Omdurman Islamic University, Faculty of Eng. Sciences,
Dept. Mining EngineeringJournal Article20110320This study is concerned with the processing of low grade chromite ores,<br />Ingassena Hills, Sudan, by froth flotation techniques. For this purpose,<br />representative samples were taken from four different mines.<br />Mineralogical examinations indicated that, the major minerals are<br />chromite and serpentine. Olivine, iron oxides and talc have been<br />identified as minor minerals. Adequate degree of liberation of chromite<br />was obtained by grinding the ore to minus 180μm.<br />Froth flotation was used to upgrade this chromite ore. Oleic acid was<br />used as collector. Several operating parameters influencing the<br />floatability of the Sudanese chromite ores were investigated. These<br />include the collector and depressant dosages, pulp pH, and conditioning<br />time. From an ore feed grading 20.27% Cr2O3, a chromite concentrate<br />of 28.71% Cr2O3 with recovery of 94.54 % could be obtained by flotation<br />at collector dosage of 0.300 kg /t , pH 9 , 2 min conditioning time, and<br />20% pulp density.Assiut University, Faculty of EngineeringJES. Journal of Engineering Sciences1687-053039No 320110501ARAB GARDEN AND THE IMPACT OF THEIR CHARACTERISTICS ADAPTABILITY TO CONTEMPORARY REQUIREMENTS66367912768710.21608/jesaun.2011.127687ENOmar EbrahemFaculty of engineering, Al azhar university, QenaMagdy MohamedFaculty of engineering Assiut universityMammdoh AliFaculty of engineering Assiut universityJournal Article20110105The paper discusses the problem of the absence thought to Heritage and<br />Contemporary Concept in the design of gardens and open spaces in the<br />modern era. Which calls to make several attempts, to gardens and open<br />spaces development. according to conditions and requirements in the<br />modern age. The garden in Arab area not just filling the spaces of urban<br />communities. but also has its origins and types of design, concepts and<br />elements that represantan especial of open spaces. The paper aims at<br />excluding characteristics of The garden in Arab area which have<br />different forms of gardens, and analyez the requirement of open spaces<br />in the modern era, and ensore sotability to their circumstances and<br />possibilitie.<br />The paper studies the following topics<br />1. The introduction: it introduces the research problems, the aim, and<br />methodology followed in the study.<br />2. Characteristics studys of Arab garden (Elements - designs –<br />concepts).<br />3. The paper which Knowing activities and contemporary requirement of<br />open spaces and make analytical study of contemporary open spaces to<br />stand on how to achieve the of heritage and contemporary<br />The research presents recommendations that aims to keep the heritage in<br />open spaces according to the circumstances and possibilities