@article { author = {Ali, Nashat A. and Abozeid, Gamal and Darweesh, Moustafa S.}, title = {ANALYSIS OF DIFFERENT PROTECTION METHODS AGAINST WATER HAMMER ON WATER SUPPLY NETWORK (CASE STUDY-ASSIUT CITY NETWORK)}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2021-2035}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114943}, abstract = {The effect of using different protection devices on water hammer phenomenon to provide an acceptable level of protection against system failure due to pipe collapse or bursting is presented. Water Hammer and Mass Oscillation (WHAMO) software is used in the analysis which uses the implicit finite difference scheme for solving the momentum and continuity equations at unsteady state case. Assiut city water supply network is used. The network is supplied from two points at pump No. 36 and pump No. 37. Flow of pipe network is studied under steady normal case, without any protection case against water hammer phenomenon, and the model under different operation cases; with a transient protection device(s) such as non-return valve, open surge tank, air chamber and pressure relief valve (PRV). The results are performed for three scenarios; the first is the normal operation of pump 36 and failure of pump 37, the second is the normal operation of pump 37 and failure of pump 36, and finally failure of pumps 36 and 37 together. The results showed that using of open surge tank or air chamber with non-return valve protects the pipe network effectively from the harm of water hammer. Also, using PRV with non-return valve protects the pipe network from extreme pressures. Although using non-return valve only doesn’t have a great effect on the maximum pressure head than the normal case, it protects the network from the more low pressures than without protection one. All protection cases safeguard the pipe network from the extremes of water hammer, but increase the water hammer wave period. Finally, the sudden shut down of the pumps 36 and 37 together has the large effect on the pressure heads than the shut down of any of them only.}, keywords = {Water Hammer,pipes network,Protection devices,Assiut city}, url = {https://jesaun.journals.ekb.eg/article_114943.html}, eprint = {https://jesaun.journals.ekb.eg/article_114943_d578a57aee35eff4160c6a65f4ffb4a2.pdf} } @article { author = {Ali, Nashat A. and Abozeid, Gamal and Darweesh, Moustafa S.}, title = {STUDYING OF WATER HAMMER IN WATER SUPPLY PIPES NETWORK WITH DIFFERENT ABNORMAL OPERATION CONDITIONS (CASE STUDY - ASSIUT CITY NETWORK)}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2036-2054}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114945}, abstract = {This research studies the effect of abnormal operation conditions on water hammer phenomenon in water supply pipe network in order to provide an acceptable level of protection against system failure due to pipes collapse or bursting. Water Hammer and Mass Oscillation WHAMO software is used in the analysis which uses the implicit finite difference scheme for solving the momentum and continuity equations at unsteady state case. Assiut city water supply network is used in the analysis. Flow of pipe network is studied due to; firstly, the sudden change in water demand at one or more junctions, secondly, the closing of some pipes of the network on the transient pressure and flow rates, and finally the failure in some network pipelines on intrusion or leakage due to transient pressure head fluctuations. The previous cases are studied in steady normal case, without any protection, and under different protection device(s) such as non-return valve and open surge tank. The results showed that rapidly change in demand increases the pressure head and flow rate fluctuations. Closing some pipelines increases pressure in a region and decreases it at another and also changes the direction of flow in the network. Also, failure of some pipelines can cause intrusion and leakage from outside the network to inside and inversely, which affects the values of minimum pressure heads more than the maximum ones. Finally, using of open surge tank with non-return valve protects the pipe network effectively from the harm water hammer.}, keywords = {Water Hammer,pipes network,abnormal operation conditions,Assiut city}, url = {https://jesaun.journals.ekb.eg/article_114945.html}, eprint = {https://jesaun.journals.ekb.eg/article_114945_c4583a140fa96c93d6acf82e421ffd5f.pdf} } @article { author = {Abd el-Rahim, Hamdy H. A. and Taha, Yehia Kamal and Mohamed, Walla El din El sharif}, title = {THE COMPRESSION AND UPLIFT BEARING CAPACITIES OF HELICAL PILES IN COHESIONLESS SOIL}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2055-2064}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114946}, abstract = {Helical piles have been used widely in engineering application .They can be used to provide structural stability against axial compression ,uplift and lateral forces. . In recent years, helical pile foundations have become more widely used in many countries. There are few studies about helical piles, for this reason the aim of the present paper is to study how to improve the prevision of the compression and uplift capacities of helical piles, and study the effect of embedded depth and helical area of helical piles in sand soil on the compression and uplift bearing capacities. Studies of helical piles with different areas of helices provided are in continuation. Compression and uplift loads were applied at different height within the soil. The embedment length of screw anchor piles was also varied to study the behavior of helical piles under compression and uplift loads. Various size and numbers of helices have been used in the laboratory tests with diameters 5 ,6.7 , 8.2 and 10cm with varying lengths. The embedment ratios for each ,D/d are 1 ,2 ,3 ,4 ,5 ,6 and 7 . An experimental setup instrumented to allow the measurement of the compression and pullout loads which affect on the helical pile installed into prepared layers of sand until failure. The results show that the compression and pullout resistance of helical anchors is strongly affected by the area and composition of helical plates welded to the pile steel shaft . The compression and uplift loads are increased with increasing of the embedment ratios, D /d and helix diameter, d. In addition to some other useful results are indicated in this paper.}, keywords = {helical pile,sand,Soil,compression load,uplift load,experimental work}, url = {https://jesaun.journals.ekb.eg/article_114946.html}, eprint = {https://jesaun.journals.ekb.eg/article_114946_cc23356f262092d16d4df2091a8968fc.pdf} } @article { author = {Abdel Sayed, F.K and Farghly, Ahmed Abdel Reheem and Abdel Reheem, Shehata. E. and Mohamed, Ashraf A. and Mohamed, M. N.}, title = {EFFECT OF SLABS IN SPACE FRAMED STRUCTURES UNDER SEISMIC LOADING}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2065-2078}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114947}, abstract = {Frame system structures which composed of only reinforced concrete columns, beams and slabs, have been widely adopted for many framed buildings. Generally, in-plane stiffness of slabs is ignored in the conventional analysis of such structures. However, in reality, the floor slabs may have some influence on the lateral response of the structures. Consequently, if the in-plane stiffness of slabs in a frame system structure is totally ignored, the lateral stiffness of the global frames may be underestimated. Therefore, the objective of the research is to investigate the effect of floor diaphragms in multi-story frames by comparing frames models with different slabs thickness by those without slabs. Furthermore, it can be seen from the study that the slab thickness is an important factor increasing in-plane stiffness of the slab and consequently increasing the overall in-plan stiffness of the building leading to an increase in base shear and a decrease in lateral displacements values.}, keywords = {rigid floor diaphragm,flexible floor diaphragms,in-plan deformation,floor diaphragm action and time history analysis}, url = {https://jesaun.journals.ekb.eg/article_114947.html}, eprint = {https://jesaun.journals.ekb.eg/article_114947_df3e559ead5965594879e418a34acc60.pdf} } @article { author = {Abd el-Rahim, Hamdy H. A.}, title = {RESPONSE OF CYLINDRICAL ELEVATED WHEAT STORAGE SILOS TO SEISMIC LOADING}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2079-2102}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114948}, abstract = {The elevated cylindrical storage silos are lifeline structures and strategically very important, since they have vital use in industries. Silos are special structures subjected to many different unconventional loading conditions, which result in unusual failure modes. In addition silos are cantilever structures with the material stacked up very high vertically. The earthquake response of silo structures for the storage of bulk solids differs for elevated silos and silos supported directly on the ground. The walls of different type of silos are subject to earthquake loads from the stored mass, and these may substantially exceed the pressures from filling and discharge. The assessment of horizontal action of ensiled material due to seismic vent seems to be particular interest. This paper is concerned with the earthquake response of these structures, which has received little attention to date. A cylindrical silo wall and bulk solid is modeled by three dimensional finite solid elements. The interaction effect between the silo wall and bulk solid is taking account by using the nonlinear approach proposed by Duncan and Chang [5]. A then interface layer proposed by Desia [4] is applied to describe the phenomena taking place on the surface between the granular material and silo wall. Coulomb's friction low was used for modeling of wall friction. An incremental iterative finite element technique is applied for dynamic analysis of wheat silos using SAP2000 structural software package [3]. In this research seven reinforced concrete silo models with different height to diameter ratios were studied and analyzed in time history by using earthquake acceleration 0.5g applied to silos models. The resulting finite element silo pressures as the silo is full with and without earthquake excitation are compared with theoretical filling and discharging pressure. The result obtained revealed that the elevated silos response is highly influenced by the earthquake characteristics and is depending on the height to diameter ratio. Also the findings indicate that the squat silos (large diameter to height ratio ) are more resistance to the earthquake and more economical. The seismic responses of the elevated wheat silo such as top displacement, normal forces, shearing forces and bending moments in silo support have been assessed for earthquake records.}, keywords = {Seismic behaviour,Bulk and granular solids,Time history analysis,Filling,Discharging,Wheat silos}, url = {https://jesaun.journals.ekb.eg/article_114948.html}, eprint = {https://jesaun.journals.ekb.eg/article_114948_a5de7fee2dce1f65160b6d6dd4dc1cad.pdf} } @article { author = {Elsayed, Aly Abdel Zaher and Rashwan, Mohamed M. and Diab, Hesham Mohamed and Abdallah, Ali Mohamed and Mohamed, Abeer Mohamed Nageeb}, title = {EFFECT OF FIBERS TYPE ON FLEXURAL BEHAVIOR OF HIGH PERFORMANCE CONCRETE BEAMS UNDER REPEATED LOAD}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2103-2125}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114950}, abstract = {The need of high performance concrete HPC is increasing in the recent years. This material becomes necessary, but it is brittle. So, fibers are used to enhance mechanical properties of HPC. The enhanced properties include tensile strength, compressive strength, elastic modulus, crack resistance, crack control, durability, fatigue life, resistance to impact and abrasion, shrinkage, expansion, thermal characteristic, and fire resistance of concrete. The main objective of this research is to study the effect of using Harex, polypropylene and glass fibers on flexural behavior of High performance concrete beams under static and repeated loads.}, keywords = {High performance concrete,Beams,harex fiber,polypropylene fiber,glass fiber,Static Loading,Repeated loading}, url = {https://jesaun.journals.ekb.eg/article_114950.html}, eprint = {https://jesaun.journals.ekb.eg/article_114950_a0e848e3df4570d1032c1305c5ad5e81.pdf} } @article { author = {Abdalla, El-Sayed Mohamed and Enieb, Mahmoud and Mohamed, Ramy Nasr Abd El-monem}, title = {THE OPTIMUM AIRPORT RUNWAY ORIENTATIONFOR DIFFERENT REGIONS IN EGYPT}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2126-2139}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.112514}, abstract = {This study investigates wind analysis which is conducted by manual analysis and computer analysis for airports outside population settlements. The accuracy of used software in computer analysis was checked by comparing their results with the manual procedure. The manual analysis represented by windrose type II while the computer analysis represented by two software the Federal Aviation Administration (FAA) Airport design and windrose PRO. Wind patterns of twenty regions in Egypt are examined by WORPLOT View and FAA Airport Design program to estimate the best runway orientation. These twenty regions have thirteen regions with existing airports and seven regions of bearable airports. After examining Egyptian surface wind pattern found that the optimum solution for the most of Egypt regions is one direction while there are two directions for Mersa Matruh and Port Said. The existing runways in Assiut airport and Port Said airport have not fulfill standard requirement which were taken in this study (wind coverage and cross wind rules) throughout the year. Runway orientation was found for previousexamined airports. Three runway orientations had been studied with more details, Aswan, Marsa Alam and Al Nozha airports.There is one proposed runway in Al Nozha airport, which have fulfilled standard requirement throughout the year instead of the existing runways. Aswan and Marsa Alam existing runways were accepted.}, keywords = {airport,runway,orientation,wind analysis,FAA software}, url = {https://jesaun.journals.ekb.eg/article_112514.html}, eprint = {https://jesaun.journals.ekb.eg/article_112514_4ec2db284c0da70ad9facc4d272d66ab.pdf} } @article { author = {Abdelrahman, Saad Awad}, title = {PERFORMANCE AND EXHAUST EMISSION CHARACTERISTICS OF A DIESEL ENGINE USING ALTERNATIVE FUELS}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2140-2159}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114953}, abstract = {The present work introduces an improvement performance and reduces the exhaust emissions of Diesel engine. The experimental comparative study of the combustion characteristics and exhaust emissions for a single cylinder Diesel engine using LPG-Diesel and CNG-Diesel dual fuels separately are studied. Different ratios of LPG and CNG in Diesel fuel up to 70% were used respectively. The test rig was furnished with a computer-controlled data acquisition system and the necessary measuring instruments to measure and record ignition delay, combustion duration, peak cylinder pressure, dual specific fuel consumption and exhaust emissions. The engine was tested at different speeds and loads. The results indicated that the ignition delay of both LPG-Diesel and CNG-Diesel dual fuel are obviously longer than that of Diesel fuel only. The combustion duration for the two cases is slightly reduced with the increase of gaseous fuel ratio at low speeds; however, it increases at high speeds. As gaseous fuel ratio is increased, the peak cylinder pressure is slightly reduced at low loads, however, at high loads; the peak cylinder pressure strongly decreases. The level of NOx emissions under dual fuel operation is lower than normal Diesel operation at different gaseous fuel ratios. CO and HC emissions for the two cases decrease with the increase of gaseous fuel ratio. The dual specific fuel consumption slightly increases with the increase of gaseous fuel ratio. The final results showed that when using CNG dual fuel, the combustion performance increases while the exhaust emissions decrease compared with Diesel and LPG dual fuel.}, keywords = {LPG,CNG,Dual fuel combustion, Diesel engine,Performance, Exhaust emissions}, url = {https://jesaun.journals.ekb.eg/article_114953.html}, eprint = {https://jesaun.journals.ekb.eg/article_114953_dc69268359ca227c2b29afaedc7bcaa8.pdf} } @article { author = {Ahmed, Mahmoud S. and Mohamed, Hany A. and Omara, Mohamed A. and Abdeen, Mohamed F.}, title = {NATURAL CONVECTION HEAT TRANSFER INSIDE VERTICAL AND INCLINED OPEN ENDED EQUILATERAL TRIANGULAR CHANNELS}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2160-2174}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114955}, abstract = {Experimental study of natural convection heat transfer inside smooth and rough surfaces of vertical and inclined equilateral triangular channels of different inclination angles with a uniformly heated surface are performed. The inclination angle is changed from 15º to 90º. Smooth and rough surface of average roughness (0.02mm) are used and their effect on the heat transfer characteristics are studied. The local and average heat transfer coefficients and Nusselt number are obtained for smooth and rough channels at different heat flux values, different inclination angles and different Rayleigh numbers (Ra) 6.48 × 105 ≤ Ra ≤ 4.78 × 106. The results show that the local Nusselt number decreases with increase of axial distance from the lower end of the triangular channel to a point near the upper end of channel, and then, it slightly increases. Higher values of local Nusselt number for rough channel along the axial distance compared with the smooth channel. The average Nusselt number of rough channel is higher than that of smooth channel by about 8.1% for inclined case at θ = 45o and 10% for vertical case. The results obtained are correlated using dimensionless groups for both rough and smooth surfaces of the inclined and vertical triangular channels.}, keywords = {Natural convection,Constant Heat Flux,Triangular Channels,Rough surface,Smooth surface}, url = {https://jesaun.journals.ekb.eg/article_114955.html}, eprint = {https://jesaun.journals.ekb.eg/article_114955_d565bfd28e362dd24d9e2de6ec3a4050.pdf} } @article { author = {Heshmat, M. and El-Sharief, Mahmoud A. and El-Sebaie, M. G.}, title = {SIMULATION MODELING OF AUTOMATIC PRODUCTION LINES WITH INTERMEDIATE BUFFERS}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2175-2189}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114959}, abstract = {A production line is an important class of manufacturing system when large quantities of identical or similar products are to be produced. The performance of a production line is highly influenced by machine failures. When a machine fails, it is then be unavailable during a certain amount of time required to repair it. Analysis of production lines divides into three types: analytical, approximation and simulation models. The analytical and approximation models have assumptions, which make these models unrealistic such as reliable workstations, certain processing distribution, the first workstation cannot be starved and the last workstation cannot be blocked. The main problems in production lines treatment are the calculation of throughput and average levels of buffers because of the great size of state space. An analytical model is reviewed to clarify the limitations to use such treatment in real production lines. Simulation modeling of production lines is considered very important for designers interested in: Workload Allocation Problem (WAP), Server Allocation Problem (SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes the performance keys, which effect on production lines. A simulation model is developed by using ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. In this paper, an actual cement production line is used as a case study. After a simulation time of 13 days, a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. The outputs clarify redesign of allocation of buffers, which verify an optimum size could be made; it might be taken into consideration when designers implement such lines. Finally modified better workstations utilization, buffer capacities and the line production rate with an increase about 15% of the production rate and economizing of 37 % from buffer capacities}, keywords = {Production Lines,Buffer allocation,Simulation,modeling,case study}, url = {https://jesaun.journals.ekb.eg/article_114959.html}, eprint = {https://jesaun.journals.ekb.eg/article_114959_7a7c7e5934e5027aceaa024f64667647.pdf} } @article { author = {El-Sharief, Mahmoud A.}, title = {USING VALUE STREAM MAPPING FOR LEAN MANUFACTURING IMPLEMENTATION: CEMENT SACKS FACTORY AS AN INDUSTRIAL CASE STUDY}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2190-2212}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114961}, abstract = {Lean manufacturing is a production system, which was first developed by Toyota Production Systems (TPSs) to reduce wastes while improving the operational and environmental performance of manufacturing and industrial businesses. While the global industrial market suffers from gnarled competition, lean manufacturing philosophy is providing an effective methodology to reduce cost and maximize profit. In addition, the market no longer accepts waste caused by out of control production or inefficient processes. A commitment to quality and lean operations will result in quality improvement, waste elimination and reduction in time and costs. Value stream mappings (VSMs), a lean manufacturing tool, which originated from the Toyota Production Systems (TPSs), is known as “material and information flow mapping.” This mapping tool uses the techniques of lean manufacturing to analyze and evaluate certain work processes in a manufacturing operation. This tool is used primarily to identify, demonstrate and decrease waste, as well as create flow in the manufacturing process. VSM can be created merely using paper and pencil; however, more advanced maps are created using Microsoft Visio as well as Microsoft Excel. This paper describes practical implementation strategies for using lean manufacturing and an industrial case study(Cement Sacks Factory) is included. After lean manufacturing methodology has been applied to the case, results are produced as Cement Sacks Factory process efficiency is raised by 4.31% and the TAKT time is reduced about 56%.}, keywords = {Lean manufacturing,Value Stream Mapping,Waste elimination,Facility layout,case study}, url = {https://jesaun.journals.ekb.eg/article_114961.html}, eprint = {https://jesaun.journals.ekb.eg/article_114961_a0a5ea2bade662770984f8b0a7ad5718.pdf} } @article { author = {Abo-Zahhad, Mohammed and Ahmed, Sabah M. and Zakaria, Ahmed}, title = {A New ECG Compression Algorithm Based On Wavelet Foveation And Huffman Coding Techniques}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2213-2230}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114964}, abstract = {This paper introduces a new ECG signal compression algorithm based on modulating the ECG signal DWT coefficients with a proper mask constructed using the foveation principle. The constructed mask is a selective mask that gives a high resolution at a certain point (fovea) and falls down away from this point. The wavelet foveation of the ECG signal leads to decreasing the amount of information contained in the signal. So, the value of the foveated ECG signal Entropy will be decreased which by turn will increase the Compression Ratio (CR).The ECG signal after wavelet foveation is coded using Huffman codes; namely optimal selective Huffman coding, adaptive Huffman coding and modified adaptive Huffman coding. The performance of each coding technique is measured based on the CR, time cost and computational complexity.}, keywords = {Wavelet Foveation,Optimal selective Huffman Coding,Adaptive Huffman Coding,Modified Adaptive Huffman Coding and Lossless compression}, url = {https://jesaun.journals.ekb.eg/article_114964.html}, eprint = {https://jesaun.journals.ekb.eg/article_114964_f9cc243f1047ad1bd044823af0df15a2.pdf} } @article { author = {Magdy, Ahmed and Sayed, S. and Mahmoud, K. R.}, title = {MODIFIED COOPERATIVE ACCESS WITH RELAY’S DATA PROTOCOL USING SMART ANTENNA}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2231-2243}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114966}, abstract = {In this paper, a new protocol named Modified Cooperative Access with Relay’s Data (MCARD) for wireless local area networks is proposed. MCARD gives remote stations chance to send their information by using intermediate stations (relays) to Access Point. In the MCARD, a relay and source stations send their information simultaneously to the access point and relay station, respectively, using a smart antenna technique. A uniform circular array of 12 half-wave dipole antenna elements is considered to control the array beam-forming of both relay and source stations. Analytical and simulation results show that MCARD can significantly improve system quality of service (QOS) in terms of throughput and delay under ideal channel conditions.}, keywords = {Cooperative communication,MAC,Uca,WLAN}, url = {https://jesaun.journals.ekb.eg/article_114966.html}, eprint = {https://jesaun.journals.ekb.eg/article_114966_3d9240c1bf286e9975673a17c2335d0f.pdf} } @article { author = {EL-Saady, Gaber and Ibrahim, EL-Noby A. and Amin, Mohamed}, title = {DESIGN AND SIMULATION OF SHUNT ACTIVE POWER FILTER FOR ASSIUT CEMENT COMPANY DC MOTOR DRIVE}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2244-2259}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114970}, abstract = {This paper introduces a design and simulation of an adaptive shunt active power filter (APF) for harmonic mitigation and power factor (PF) correction of 630 kW DC motor (DCM) drive (called By Pass Motor Fan in production line # 2 in Assiut cement company). Due to the presence of power thyristor converters, a very bad PF and different harmonic components exist in the system, especially in the input current to the DCM drive. All measurements needed for complete analysis at the Medium Voltage (MV) supply source side and at Low Voltage (LV) motor drive side are performed using professional power quality (PQ) analysers and their associated software programs. The studied system is modelled and simulated using MATLAB Simulink software. The instantaneous active and reactive current components id and iq control method is used in this study to drive the shunt active filter. Therefore the harmonic contents at MV supply source and at point of common coupling (PCC) with the DCM drive are reduced to the standard values. Both digital simulation and practical measurements are presented and consistent. The results show that a good dynamic and steady-state performance of the system is achieved.}, keywords = {Active power filter,DC motor,harmonics mitigation,power factor correction and power quality}, url = {https://jesaun.journals.ekb.eg/article_114970.html}, eprint = {https://jesaun.journals.ekb.eg/article_114970_55ce8626af91590dc11350ad8e8ce65a.pdf} } @article { author = {Hassan, Seham Mahmoud and Abdel Mageed, Khaled Salah Said and DAEF, Mohamed Ayman}, title = {THE MUTUAL RELATIONSHIP BETWEEN INTERIOR DESIGN AND PSYCHOLOGICAL NEEDS OF THE CHILD in KINDERGARTEN BUILDINGS}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2260-2273}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114973}, abstract = {One of the most important buildings that serve children in early childhood is kindergartens. Therefore, the concern of the interior environment of these buildings has a direct impact on the psychological state of the children. The architectural and psychological studies did not specify this relationship clearly, specially, the effect of the interior design elements on the psychological needs of the children, which should take into account by the interior designer. The present study aims to reach preliminary indicators about the mutual relationship between the interior design elements and psychological needs of the children in kindergartens. To achieve the objectives, the study used the descriptive analytical approach to conclude this relationship. We also investigated the different definitions of the interior design and describe the different psychological needs of the children, and finally clarify the relationship between them, which we can find it clearly in our results.}, keywords = {}, url = {https://jesaun.journals.ekb.eg/article_114973.html}, eprint = {https://jesaun.journals.ekb.eg/article_114973_add23f4c334b230998b07ac52b1b92b4.pdf} } @article { author = {Al-Zoubi, Yahia Yosef}, title = {EVALUATION OF NEW MATERIALS USED IN THE TENTS OF MENA – MACCA – K. S. A}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2274-2293}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114975}, abstract = {This paper entitled "Evaluation of New building material (Teflon) used in the tents of Mena –Macca – K. S. A." discusses the use of traditional tents in Mesher Mina, which are easily burn and the required alternative materials for fire resistant. Five materials were selected; experiments were carried out to choose the right ones. Membranes were selected Teflon coated glass fiber, a non flammable, not self-ignite, and resist fire, when burned it produces a small amount of non-toxic gases it. It was implemented in three phase.The paper consists of five sections. The first one is an introduction. The second section deals with the new building materials. The third section looks at the geography of Mena, and the old tents that were used there. The fourth section describes the stages of development of pilgrims, accommodation in Mena. And describes the details of the global architectural competition for the Project and the architectural design of tents, in addition to their relationship to its environment. And finally the results.}, keywords = {}, url = {https://jesaun.journals.ekb.eg/article_114975.html}, eprint = {https://jesaun.journals.ekb.eg/article_114975_fd564e59c8051d6b8d1d647654caacb2.pdf} } @article { author = {Yousef, Walaa El-sayed}, title = {STUDYING GRADUATION PROJECT, ARCHITECTURE DEPARTMENT, FINE ARTS FACULTY, ALEXANDRIA UNIVERSITY ACCORDING TO ACADEMIC CRITERIA, CURRICULUM, AND PRACTICING MARKET}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2294-2321}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114976}, abstract = {Developing Architectural Education is a top priority in Egyptian Public and Private Universities. As well; Architectural Department, Fine Arts Faculty fought several experiments to develop its regulations and curriculum to keep up with the International Architectural Education Standards. The study is concerning the most important course in the Department’s scientific regulation; namely, Graduation Project, as an applied material, which evaluate the student’s knowledge and background that is gained during Undergraduate Study. The Graduation Project curriculum was analyzed according to three factors as a criterion for course success; which are the educational standards, the teaching methodology, and architecture practicing market .Each factor was individually examined in parallel view. Studying the educational standards included Fine Arts Faculty and Architectural Department regulations, vision and goals, the standers of International Union of Architects, and the International Graduation Project Competitions regulations. Studying the teaching methodology included project’s preparation, project’s stages, and how did student address the system-wide to handle the course easily, that was through a questionnaire to discover how far the course achieves its objectives. Studying the relationship between Graduation Project and practicing market intended to show how far the course supported graduates’ qualifications in different fields in architectural practicing market. The results of the analytical study for the mentioned three factors showed the course’s strengths and weaknesses, which was the base for suggesting a proposal for developing the course’s material that fits those factors as criteria. Finally, a number of conclusions and recommendation are derived. Keywords: Architectural Graduation Project, Architectural Curriculum, Architectural Education, Architectural Practicing Market.}, keywords = {Architectural Graduation Project,Architectural Curriculum,architectural education,Architectural Practicing Market}, url = {https://jesaun.journals.ekb.eg/article_114976.html}, eprint = {https://jesaun.journals.ekb.eg/article_114976_3e29f9dea5b7d4f2c8ec7686d8a5cc65.pdf} } @article { author = {Elwazir, Mona Awad}, title = {TOWARDS A SUGGESTED METHODOLOGY TO REDUCTION VERTICAL URBANEXPANSION IN EGYPTIAN TOWNS AFTER 25 JAN REVOLUTION CASE STUDY; THE PHENOMENON OF RESIDENTIAL TOWERS VIOLATION AT ALEXANDRIA CITY}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2322-2353}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114986}, abstract = {The January 25 revolution happened in Egypt between supporters and dismissive , and as a habit of revolutions they talked a lot of changes in people, and sometimes lead to split the forces of the people , and the emergence of clusters and several political movements . Influenced by this country seriously affected sometimes leads to the disintegration and division in the structure of the country , it is about to collapse unless rectify the matter by the concerned officials . Hence the negative effects occur on all aspects of society and the environment surrounding it. Since the architecture is the pulse of the community, and a reflection of the culture , as well as a measure of how attended , there has been a significant change in terms of architectural cities of Egypt after the revolution of January 25, this change appeared in the form of Vertical expansion abuse of residential buildings amounts in height , for the environment surrounding streets located where . This current expansion in all Egyptian cities such as illness incurable . The city of Alexandria is one of the most important coastal cities of distinctive historic character and architectural style on the Mediterranean coast in general and the Arab region in particular, there is now creates residential buildings violating the rise, and that does not fit at all with the nature of the soil and stratification in some areas of the city of Alexandria , as well as the lack of architectural relationship between the ratio of the height of the building housing the street overlooking it, and respect the laws of building in the city . And has become a phenomenon of high towers , which grew at random and scary, in the narrow streets exceed 5 meters and sometimes less , a recurring architectural phenomena , monitored by the citizen in Alexandria easily everywhere here and there. This research aims to monitor and analyze this phenomenon constructivism, to expand the vertical current residential buildings offense in Alexandria , and try to stand on the causes of social and political after the revolution, and that led to the clarity of the phenomenon and its risks and negative harm to the Egyptian citizen within the city. As well as visualize systematic practical, offers a range of proposals from the perspective of the researcher , to reduce this phenomenon, and encourage the emergence of the role of the state and legislative institutions , and the contribution of the media and its positive role in raising the awareness of the individual and the family as a whole. Keywords: growth vertical Alexandria - residential towers violation architecture and 25 January revolution - urbanization in Egypt}, keywords = {growth vertical Alexandria,residential towers violation architecture and 25 January revolution,urbanization in Egypt}, url = {https://jesaun.journals.ekb.eg/article_114986.html}, eprint = {https://jesaun.journals.ekb.eg/article_114986_b662339d96a5c9127c3c5ef88727fe05.pdf} } @article { author = {Ali, M. M.}, title = {PREHEATING AND START-UP OF PREBAKED ALUMINIUM REDUCTION CELLS}, journal = {JES. Journal of Engineering Sciences}, volume = {41}, number = {No 6}, pages = {2354-2364}, year = {2013}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2013.114987}, abstract = {Coke bed preheating with shunt rheostats is considered one of the most popular methods used in the aluminium reduction cells preheating. Typical cathode heat-up rate during preheat and start-up as well as typical start-up anode effect were achieved. This paper studied the important considerations affecting the preheating and start-up of 210 kA prebaked cells at Egyptalum, as well as the evaluation of performance of the coke bed preheating method with shunt rheostats. The average preheating time was found to be 53 hours with energy consumption of up to 115,000 kWh. The effect of using different shunts-rheostats materials on cell current was illustrated. Also cell voltage before, during and after finishing the anode effect was studied. It was found that the cell voltage and time of anode effect during this stage varied in the range from 12 to 23 V and 60 to 120 min. respectively. The cell performance parameters, like current efficiency, energy and carbon consumption, were improved.}, keywords = {Coke bed preheating method,Shunt rheostats,Aluminium reduction cells,Start,up anode effect and cell voltage,Quality of preheating and start,up process}, url = {https://jesaun.journals.ekb.eg/article_114987.html}, eprint = {https://jesaun.journals.ekb.eg/article_114987_a722af3aedee7eace79939c69db812a2.pdf} }