@article { author = {Essai, Mohamed H. and Magdy, Marina}, title = {EFFICIENT HARDWARE IMPLEMENATATIONS OF FEEDFORWARD NEURAL NETWORKS USING FIELD PROGRAMMABLE GATE ARRAY}, journal = {JES. Journal of Engineering Sciences}, volume = {46}, number = {No 5}, pages = {539-555}, year = {2018}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2018.110510}, abstract = {Hardware implementation of Artificial Neural Network (ANNs) depends mainly on the efficient implementation of the activation functions. Field Programmable Gate Array is the most appropriate tool for hardware implementation of ANNs. In this paper we introduce FPGA-based hardware implementation of ANNs using five different activation functions. These implemented NNs are described using Very High Speed Integrated Circuits Hardware Description Language (VHDL) and carried out by Digilent Basys 2 Spartan-3E FPGA platform from Xilinx. The performances of the implemented NNs were investigated in terms of area efficient implementation, and correct prediction percentages for solving XOR, and Full-Adder problems.}, keywords = {Artificial system,VHDL,FFNN,FPGA,Back-propagation,Activation function}, url = {https://jesaun.journals.ekb.eg/article_110510.html}, eprint = {https://jesaun.journals.ekb.eg/article_110510_68f7a11b4f34369aa444a0157734e422.pdf} } @article { author = {M. Shafey, Hamdy and J. Al-Nahari, Walid and H. El-Zohri, Emad and O. Abbas, Aliaa}, title = {CHARACTERIZATION OF AN EXPERIMENTAL FACILITY FOR BUBBLING FLUIDIZED BED COMBUSTOR}, journal = {JES. Journal of Engineering Sciences}, volume = {46}, number = {No 5}, pages = {556-573}, year = {2018}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2018.114985}, abstract = {Fluidized bed technology offers an attractive way for energy production with clean environment by the combustion of even low-grade waste derived fuels (WDF). This paper reports experimental results concerning the characterization of a small-scale bubbling atmospheric fluidized bed combustor with WDF batch feeding. The combustor having 0.215 m inner diameter and 1.88 m height is equipped with a packed-bed sandwich-type fluidizing air distributor. The experimental fluidized bed combustor (EFBC) is provided with facility items necessary for the operation, control, and measurements. Results of the measured fluidized bed pressure drop and temperature were investigated for cold flow, hot flow, and combustion tests during the characterization procedure. The results of these tests clearly indicated the good fluidization characteristics inherent to well-controlled operation of the EFBC facility. The characterization tests also indicated the reproducible and safe operation characteristics of the EFBC facility without appreciable leakage of fluidizing air and exhaust gases. Moreover, the obtained uniformity of the fluidized bed temperature together with the high estimated values of bed-to-immersed cooling coil heat transfer coefficient, added more evidence on the good combustion characteristics of the investigated EFBC facility.}, keywords = {Characterization,Experimental facility,Fluidized bed technology,Bubbling bed,and Combustion of waste-derived fuels}, url = {https://jesaun.journals.ekb.eg/article_114985.html}, eprint = {https://jesaun.journals.ekb.eg/article_114985_7c5823d976fb08b3e801fdc108f492c0.pdf} } @article { author = {Ahmed M.E. Rizk, Sherein}, title = {A STUDY ON THE EFFECT OF PHYSICAL AND MECHANICAL PROPERTIES OF ROCKS ON THEIR GRINDABILITY}, journal = {JES. Journal of Engineering Sciences}, volume = {46}, number = {No 5}, pages = {574-586}, year = {2018}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2018.114988}, abstract = {Grinding processes are very costly because of significant energy requirements to achieve particle reduction. It was estimated that about 5-6% of the power generated all over the world is consumed in size reduction of raw materials necessary for mineral, cement, and ceramics industries. Mineral processing comminution is always the most energy intensive operation. The energy consumption may vary considerably for different ore types and flowsheets with values ranging from 10 kwh/t to 30 kwh/t and corresponding to 30 to 50% of the total energy cost. Factors affecting the process of comminution include the design and operating parameters of the comminuting machine as well as the physical and mechanical properties of the comminuted rock.Consequently, the main objective of this work is to study the effect of the most important physical and mechanical properties of rocks on their grindability. It is applied on marble, ilmenite ore and granite samples using a laboratory scale ball mill. The performance of each experiment is measured by the percentage of -1.25 mm in the product. 2n factorial method is applied as an experimental design method on each studied rock. Optimum values of the studied operating parameters and their gradation according to their effect on the process are achieved for each studied rock it is concluded that the performance decreases as the compressive strength and hardness of the studied rocks increase and increases as the abrasion value increases. It is also found that optimum values of the studied operating parameters and their gradation depend on the mechanical properties of the studied rocks.}, keywords = {Ball mill,comminution,properties of rocks}, url = {https://jesaun.journals.ekb.eg/article_114988.html}, eprint = {https://jesaun.journals.ekb.eg/article_114988_6f6b88b83288cfd417f2d2f3cddb0097.pdf} } @article { author = {Al-Saied, Doha and Sheta, Sherif and El-Sayad, Nanees}, title = {URBAN UPGRADING OF THE RIVERFRONT OF MANSOURA CITY IN EGYPT - USING LEED-ND CRITERIA}, journal = {JES. Journal of Engineering Sciences}, volume = {46}, number = {No 5}, pages = {587-598}, year = {2018}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2018.114990}, abstract = {Due to its geographical location, Egypt has long waterfronts of the Nile River and sea coasts. Though, these areas are marginalized despite the efforts and plans laid by stakeholders for the development of these areas; some of which have already been applied. This paper discusses the problems of riverfront locations in Mansoura City, Egypt; these include the deteriorated conditions of existing riverfronts; mainly neglecting the basic needs of residents and visitors to these areas. The study tackles the reasons behind deterioration from the function and place-shaping factors, along with the human aspect of how the user especially the pedestrians, commensurate with these places. This paper aims at introducing a sustainability-based proposal for the urban upgrading of riverfronts in Mansoura City, Egypt; adapted from and guided by LEED-ND criteria. To attain its aim, the study demonstrates and analyzes a number of world recognized successful case studies, empowered by LEED-ND as guiding criteria. A set of localized pedestrian friendly guidelines are concluded for the planning and design of integrated, sustainable solutions that promote environmental, visual and humanitarian planning and design potential for future riverfronts in Egypt.}, keywords = {Riverfront,Sustainable Urbanism,Mansoura Urban Paths,LEED-ND Criteria}, url = {https://jesaun.journals.ekb.eg/article_114990.html}, eprint = {https://jesaun.journals.ekb.eg/article_114990_09610aa23d6843de08cbce01a7af24dd.pdf} } @article { author = {M. T. El-Feki, Sameh and S. Saleh, Mohamed}, title = {POST-OCCUPANCY EVALUATION STUDY OF A UNIVERSITY PREMISES IN CAIRO, EGYPT}, journal = {JES. Journal of Engineering Sciences}, volume = {46}, number = {No 5}, pages = {599-616}, year = {2018}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2018.114993}, abstract = {This study introduces a post-occupancy evaluation to assess the performance of one of the buildings at MSA University (a pioneer private university) in Cairo, Egypt, from the users’ perspective. The main objective of this study is to understand the relationship between the built environment demonstrated in the Faculty of Engineering indoor spaces and the needs of the college community comprising the students and staff. This will underpin the strengths and shortcomings of the present design to facilitate future improvements. The adopted methodology utilizes a number of assessment techniques, including observation, walk-through, questionnaires and interviews. The study culminates with a number of recommended actions to improve the building’s performance from the users’ (students and staff) perspective, which have a strong impact on the learning experience. These are classified into immediate, intermediate-term and long-term actions.}, keywords = {Post-Occupancy Evaluation,building performance,indoor spaces,user’s satisfaction,higher education buildings,Cairo}, url = {https://jesaun.journals.ekb.eg/article_114993.html}, eprint = {https://jesaun.journals.ekb.eg/article_114993_efd5e5afa68dcb1ec5d6b6cd5d44aa81.pdf} } @article { author = {Hssan Hassan Abdelhafez, Mohamed}, title = {THE DEGREE OF URBAN PATTERNS COMPACTNESS AS A PASSIVE COOLING STRATEGY IN HOT DESERT CLIMATE "WADI KARKAR VILLAGES – ASWAN AS A CASE STUDY"}, journal = {JES. Journal of Engineering Sciences}, volume = {46}, number = {No 5}, pages = {617-629}, year = {2018}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2018.114995}, abstract = {Pedestrian thermal comfort is related to the urban patterns generated from a specific urban planning methodology. It is noteworthy that urban planning process in Egypt does not consider passive urban design strategies to help reduce heat stresses, although there are historical examples of environmental architecture such as the Nubian architecture which considered one of the most famous examples of the desert architecture, where interacted with the surrounding environment. Therefore, this study investigates the best possible ratio for urban compactness as a passive cooling strategy. Moreover, it definesthe relationship between the compactness degree, air temperature, and air velocity, also the researchproposes the appropriate conditions for improving the pedestrian wind comfort. The numerical simulations were conducted, using the Autodesk CFD 2016 software. This research suggests some modifications for a variety of ratios in different orientations. The results show that the ratio 1 : 1.5 in the North-South orientation records the best value of the temperature and the air velocity. The results of the correlation indicate that the higher the air velocity the lower the air temperature and vice versa. In addition, the air velocity in most of the cases is suitable for long time outdoor sitting in different orientations.}, keywords = {Pedestrian thermal comfort,Pedestrian wind comfort,Urban compactness,Passive cooling strategy,Nubian architecture}, url = {https://jesaun.journals.ekb.eg/article_114995.html}, eprint = {https://jesaun.journals.ekb.eg/article_114995_61ef66d6d8e1eab021e44f56f21c62f0.pdf} } @article { author = {Ahmed Mohammed, Dina and Sayed Hassan, Amr and Mohammed Aly, Abdel Monteleb}, title = {THE IMPACT OF COURTYARDS ON THE THERMAL PERFORMANCE OF BUILDING SPACES IN THE UNIVERSITY BUILDINGS OF THE UPPER EGYPT DURING THE COLD PERIOD: (FACULTY OF AGRICULTURE BUILDING, SOHAG UNIVERSITY "NEW CAMPUS") AS A CASE STUDY}, journal = {JES. Journal of Engineering Sciences}, volume = {46}, number = {No 5}, pages = {630-641}, year = {2018}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2018.114997}, abstract = {Due to the importance of courtyards in the educational buildings, which improve the climatic environment and its impact on students' learning and performance. Also, very few studies were conducted in the cold period of the academic year of university buildings. The research focuses on the study of the thermal performance of the indoor courtyards and the building spaces in the university buildings, and their effect on the thermal comfort of the students in the courtyard during the cold period of the academic year, which represents the measurement in (October, November, February). The research aims to study the effect of the indoor courtyards on the thermal performance of the building spaces during the cold period of the academic year, at the Faculty of Agriculture building in Sohag University (new campus). To achieve the objective of the study, the research depends on the analytical approach, field measurements and questionnaire. So that indoor and outdoor temperatures, relative humidity, and air speed for the courtyards and the building spaces was measured, and the number of 360 questionnaires in the "courtyard 2" were distributed during the cold period, which represents the measurement in (October, November, February). The results showed higher temperature values of "courtyard no. 2" than "courtyard no. 1" and "courtyard no. 3" during the cold period, and indoor temperatures of the building spaces were recorded in the range of temperatures acceptable during the cold period, and temperatures were lower than the temperatures for the space of exterior façade, the thermal sensation of the students in the "courtyard no. 2" ranged from "neutral" and "slightly hot". The study will be completed for the thermal performance of the courtyards and spaces in the hot period until the end of the academic year.}, keywords = {thermal comfort,university buildings,Courtyard,Thermal Performance}, url = {https://jesaun.journals.ekb.eg/article_114997.html}, eprint = {https://jesaun.journals.ekb.eg/article_114997_95b527b0016f450952472cc911a38c06.pdf} } @article { author = {Osman Abdel Rahman, Hisham}, title = {REHABILITATION OF THE NEW ASSIUT CITY MAIN BUILDING IN TERMS OF DESIGN CONSIDERATIONS FOR THE NEEDS OF PEOPLE WITH DISABILITIES}, journal = {JES. Journal of Engineering Sciences}, volume = {46}, number = {No 5}, pages = {642-656}, year = {2018}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2018.115001}, abstract = {Disability is one of the most important social and health terms in the recent period in Egypt, especially with regard 2018 is Disabled year, and the enactment of the Law on the Rights of Persons with Disabilities at the beginning of the year 2018 (Law 10 of 2018), and each of us is disabled in one way or another permanent or temporary disability in his life, Anyone who breaks his leg may need a safe environment to move around without fear to follow his daily social activities, so the research deals with the problem of the rehabilitation of the building of the new city of Assiut to the requirements of people with disabilities of standards, Specifications, materials, slopes, elevators, entrances and doors As a public building serving different sectors of the society, including people with disabilities, especially after Egypt's signing of the Convention on the Rights of Persons with Disabilities. The research aims to find a way to determine the compatibility of the building with the needs of persons with disabilities by designing a checklist to measure this According to a set of universal considerations for architectural design for the needs of people with disabilities in public buildings. The study concluded a series of measures that would increase or improve access for people with disabilities to the new Assiut building.}, keywords = {Architectural design,Disabled,Egypt,Public buildings}, url = {https://jesaun.journals.ekb.eg/article_115001.html}, eprint = {https://jesaun.journals.ekb.eg/article_115001_479283966817a2a436ad13af9846e2dc.pdf} } @article { author = {Helmy Almorsi, Mohammed}, title = {THE ROLE OF ARCHITECTURAL CONSERVATION OF HERITAGE SITES IN FACING CATASTROPHIC EVENTS}, journal = {JES. Journal of Engineering Sciences}, volume = {46}, number = {No 5}, pages = {657-673}, year = {2018}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2018.115003}, abstract = {Recently various countries especially Arab ones have been subjected to many catastrophes, whether environmental ones such as air and water pollution or natural catastrophes such as volcanoes or earthquakes and rain or even man-made catastrophes like war and thefts. These catastrophes could affect negatively residential areas which includes valuable heritage buildings that exist numerously in Arab countries. Many of which have been exposed to total or partial demolition which increases the possibility of the annihilation of this great heritage.}, keywords = {Digital Documentation,architectural conservation,Catastrophic events,heritage sites}, url = {https://jesaun.journals.ekb.eg/article_115003.html}, eprint = {https://jesaun.journals.ekb.eg/article_115003_ef72c8f01232d7ad6dba620ad06892cb.pdf} }