2024-03-29T12:37:29Z
https://jesaun.journals.ekb.eg/?_action=export&rf=summon&issue=16254
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
FLOW CHARACTERISTICS OF OPEN CHANNELS WITH FLOATING VEGETATION
Hassan I.
Mohamed
Alaa-Eldin M.
Abd-Elaal
Adel A.Mahmoud
Adel A.Mahmoud
Floating vegetation (Water hyacinth) causes many problems in waterways where it retards flow movement and changes flow structure. In this study the impact of water hyacinth on flow behavior in open channels was investigated in a laboratory flume. Water hyacinth was harvested from natural streams. Four different vegetation densities, three different vegetation root depths and three different vegetation zone lengths were used for smooth and rough channel bed. The case without water hyacinth was considered as comparative case. The water surface profiles for all cases were investigated. Results show that in the presence of water hyacinth water surface profile rises before vegetation zone then goes down until reaches to normal water surface. Results also show that water surface profile influenced by vegetation density, vegetation root depth, and vegetation zone length and bed roughness. Also the effect of vegetation parameters (density, root depth, zone length) on heading up, discharge and equivalent Manning's roughness coefficient was investigated and it is found that these parameters have a great effect on it. Multiple regression equations based on the dimensional analysis theory were deduced to calculate heading up, discharge and equivalent Manning's roughness coefficient.
heading up
Vegetation
Manning's roughness coefficient
Water hyacinth
2020
03
01
186
196
https://jesaun.journals.ekb.eg/article_108332_70f9ef031421984ee7621cb7d6dc7ac6.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
DETECTING LAND COVER CHANGES USING VHR SATELLITE IMAGES: A COMPARATIVE STUDY
Farrag
A. Farrag
Yasser
G. Mostafa
Nasser
A. Mohamed
The new satellites sensors such as GeoEye , WorldView and Ikonos , provide new data for better delineation, detection, and visualization of Land cover changes. Several techniques have been proposed and developed for change detection automatically. The main aim of this research is to assess the use of very high-resolution satellites images in monitoring land cover changes in Egypt. Five change detection techniques have been tested using Ikonos and WorldView images. The techniques considered are image difference, image ratio, principal component analysis, postclassification comparison, and multi-date direct classification. The accuracy of each technique is evaluated via the overall accuracy and kappa coefficient. The results showed that the principal component analysis technique produced more accurate change detection map compared to other methods. Also, it was found that changes from vegetation to urban in the study area are greater than changes from bare soil to vegetation.
Change Detection
very high-resolution
Object-based
2020
03
01
200
211
https://jesaun.journals.ekb.eg/article_264927_7b077f565c5f1bae7436c1226d2bb087.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
EFFECTS OF WELDING PARAMETERS ON CHARACTERIZATION AND MECHANICAL PROPERTIES OF STEEL 37 WELDMENTS
Mohamed M.
Ali
Moatasem M.
Khalifa
Effects of welding parameters on the characterization and mechanical properties of steel 37 weldments were investigated on a single V-shaped groove weld joint. These parameters are; type of electrode, welding current, welding speed, and type of used arc welding and plate thickness. Radiography, metallography and mechanical testing were carried out for the steel 37 weldments. Results indicated that as the heat input increased, the welding current and plate thickness increased but the welding speed decreased. The grains of the base metal, heat affected zoon (HAZ), root and cap were changed in size and phases in these locations. Radiography showed that no defects were found. The average hardness values were 173 HB at base metal, 175 HB at the HAZ, 180 HB at the cap and 133 HB at the root, respectively. Yield strength, ultimate tensile strength and elongation of the welded steel 37 were in the range between 374 and 425 MPa, between 542 and 606 MPa and in the range between 34.6 and 37.5 %, respectively. Such values tend to increase with increasing the current and heat input and decreasing the plate thickness. The chemical and mechanical properties of the welded electrodes proved to influence the efficiency of the welding process. The best welding results were obtained with current 75 A at the root, 130 A at the cap and welding speed of 1.3 mm/s in the root and 2 mm/s in the cap.
Steel 37
Weldments
Welding variables
hardness
tensile strength
Elongation
2020
03
01
212
221
https://jesaun.journals.ekb.eg/article_188012_af8b8193141ed7239c26ba9546fd570d.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
CORRELATION BETWEEN SECURITY AND SENSE OF BELONGING: AN APPROACH TO SOCIAL SUSTAINABILITY IN NEW URBAN COMMUNITIES
Ibtihal Jaluddin
Muhammad Ibrahim
Social sustainability is one of the pillars of sustainable development for communities and has been included in recent theoretical and experimental studies and discussions on sustainable development in a limited way. This paper aims to fill part of the gap resulting from the lack of studies on this aspect in the field of architecture and the development of new communities in a sustainable way، by studying and analyzing the standard of security as one of the components of social sustainability in new cities and its impact on enhancing a sense of belonging to the place. The paper assumes that prevention of risk is a fundamental concept of social sustainability، as contemporary risk conditions resulting mainly from economic conditions have led to an increase in crime rates in new cities and the consequent serious social and spatial repercussions of contemporary human societies and areas living in it. As part of sustainability، we suggest that social sustainability seeks to address social concerns as a result of different crimes by using environmental and urban design methodology CPTED "crime prevention through environmental design". This was done by analyzing one of the neighborhoods of New Cairo، which was developed by the efforts of its residents and achieved some of the criteria of CPTED method used in the study، using qualitative، quantitative method، through interviews، study the area and analyze the responses of the questionnaire directed to the population. That done to study coloration that links statistically between the achievement of security and a sense of belonging، which showed the presence of strong positive correlation semantics for some criteria such as the role of street lighting and the guards to achieve security in the case study، and its impact on increasing the sense of belonging، the study also showed negative relationships of housing ownership on the sense of belonging. Finally، the paper suggested simple method to achieve a crime reduction approach in new cities.
2020
03
01
219
230
https://jesaun.journals.ekb.eg/article_135243_f4887690b182816b9ff29b92e8f1c0e3.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
USING SHIPPING CONTAINERS IN EGYPT FROM AN ARCHITECTURAL PERSPECTIVE (AN ANALYTICAL STUDY)
Essam Salah Said
Abdel Magid
The trend towards recycling of unused or poorly used materials is a major challenge to society as it contributes to reducing resource and energy consumption. In terms of architecture, the use of these materials as alternative elements of construction is one of the objectives of green architecture. The use of shipping containers for construction works is a global approach. It is an economic and environmental solution that transforms unused containers into low-cost and fast-processing structures that can be assembled in different styles; used for residential, commercial or administrative purposes; The use of shipping containers in architectural terms in Egypt is very limited and represents only individual efforts in limited trials. He also does not find a high demand in Egypt for several reasons, some respect to technical reasons and others regard to humanitarian reasons. The study aims to identify the reasons for the lack of expansion in the use of shipping containers in the construction of buildings in Egypt, although there are a number of factors supporting this trend. This is done by studying the current state of container usage in Egypt and the obstacles and challenges facing the expansion of its use. It also presents a number of suggestions that contribute to supporting the idea; in addition to some secondary objectives of studying the advantages and disadvantages of using containers in architecture in general, and universal experiences in this direction The study follows the analytical approach that is carried out through the analysis of studies conducted in this direction and the study and evaluation of the current situation through available sources of information and related references.
Shipping Containers
reuse
challenges
Constraints
Constructions
2020
03
01
231
244
https://jesaun.journals.ekb.eg/article_135245_fbc5f873ccf7b1ecd386f2d27742a4b8.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
ARCHITECTURAL COMPARATIVE ANALYSES BETWEEN ROBOTIC SURGERY WARDS IN DIGITAL HOSPITALS AND TRADITIONAL SURGERY WARDS IN CONVENTIONAL HOSPITALS
Randa
M. A. Mahmoud
Amr
M. A. Youssef
Nady M
. Abdel Karim
Recently, the integration between healthcare services and new technologies has been enhanced to be very necessary and effective inside digital Hospitals. Digital hospitals include a huge number of healthcare advanced technologies that have special digital and architectural requirement; these requirements cannot be provided in traditional hospitals. Many previous studies and guidelines addressed few numbers of digital hospital’s rooms and their architectural requirements. Hence, in this study, healthcare advanced technologies has been determined for outlining the architectural consideration of digital hospital’s rooms. Accordingly, Robotic Surgery Ward (RSW) has been compared with Traditional Surgery Ward (TSW) for: a) demonstrating the effect of an advanced technology (Robotic technology) on a digital hospital ward and b) helping designers to find out the main architectural and economic principles of designing RSWs besides TSWs. The main findings in this study are: a) outlining the main architectural characteristics of digital hospitals in general and digital hospital’s rooms in specific, b) articulating the main architectural and economic aspects for RSW and robotic surgery rooms, which is different from TSW. As an application of the comparative analyses, possible design alternatives of RSW and TSW has been also proposed and compared.
Digital Hospital design
Healthcare advanced technologies
Robotic Surgery Ward design
Architectural and economic considerations
2020
03
01
245
261
https://jesaun.journals.ekb.eg/article_135249_aa1d791769d80264c412b1779b325e3b.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
THE DEVELOPMENT OF THE MANAGEMENT SYSTEM FOR THE PRESERVATION OF HERITAGE ASSETS IN EGYPT “PRESENTATION OF THE STATUES QUE AND HOW TO DEAL WITH IT”
Amal
Ahmed Abdo
Ahmed
Abdel Ghani Morsi
Bahaa
Muhammad Wajdi Arif
The paper studies the management system for the preservation of heritage assets in Egypt and analysis the system, and reformulates it to suit the current situation challenges. The research methodology depends on theory and practice; it identifies and examines the management of the preservation process of heritage assets in Egypt and most of the administrative authorities concerning such sites as well as the present state of the administration for the preservation of heritage assets in Egypt. It finally addresses the amendment of the system at the strategic, schematic and site management tiers.
Heritage conservation
Heritage conservation management
partnership
Investment in heritage assets
2020
03
01
262
273
https://jesaun.journals.ekb.eg/article_135252_7eb4f5bf9d90270e3522825f8d5d2174.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
INVESTMENT FOR THE PRESERVATION OF HERITAGE ASSETS IN DEVELOPING COUNTRIES: FACTS AND CONCEPTS
Amal
Ahmed Abdo
Ahmed
Abdel Ghani Morsi
Bahaa
Muhammad Wajdi Arif
Developing countries have many cities which contain a historic district that include older buildings and streets as well as traditional activities and/or events. Such historic districts have survived and not changed to match the new developments. However, the continuing pressure of the population growth and the geographic expansion often represents a serious threat to these heritage assets which thought of as a block in the way of advance. This paper discusses the implementation of the heritage economics principles and its methodologies in the investment appraisal for the preservation of heritage assets in developing cities and countries, taking into consideration the characteristics of cultural heritage in such environment and discusses the options and anticipations that might face the planners of urban areas. The paper also summarizes the methodology used for the investment appraisal in the projects that aim at reusing the assets of material heritage. It also explains and gives information about the traditional status of developing countries; that's to clarify the implementation of post-investment assessment techniques on the projects concerned with the preservation of heritage assets in developing countries.
Heritage assets
Investment appraisal
Cost-benefit analysis
Cultural value
Heritage economics
2020
03
01
274
286
https://jesaun.journals.ekb.eg/article_135253_f2115298726c4690d8a33d802bbb1f4e.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
XERISCAPE AS AN APPROACH TO SAVE WATER IN LANDSCAPE PROJECTS
Dalia
Wagih A.AlHalim
Water is an important rare resource that needs to be saved. In spite of considering landscape architecture as one of the most components of cities that use a huge amount of water, it can be an approach to save water without losing the beauty of cities. Therefore, the research pinpoints the dilemma of landscape architecture and its relationship with water and how to design the landscape using less water by different means. The research argues that xeriscape concept is an approach to guarantee the sustainability of landscape architecture. This can be achieved by the ideal usage of water by selecting the suitable techniques either the irrigation system or reusing water, moreover, by the proper management for landscape architecture and its requirements. The research discusses these approaches through the literature review and concludes the different means of saving water by applying the xeriscape concept, irrigation systems, and management. These means are summarized in a schedule in order to be a guide for landscapers to save water in landscape architectural projects. This schedule is used to measure the percentage of applying the concluded items for saving water in different selected gardens to illustrate some useful water-conserving techniques in landscape architecture.
Xeriscape
Saving water
Landscape architecture
Irrigation
Reuse Water
2020
03
01
287
301
https://jesaun.journals.ekb.eg/article_135255_6734bae8119fd18dd98f7fc72521ffa2.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
THE IMPACT OF PHASE CHANGE MATERIALS ON THE BUILDINGS ENEGY EFFICIENCY IN THE HOT DESERT AREAS THE ANNEXED ROOMS OF THE TRAFFIC BUILDING IN NEW ASWAN CITY AS A CASE STUDY
Ayman
Ragab Abdel Radi
Energy crisis considered one of the most important challenges in the coming years due to future climate change and its negative effects as high values of air temperature and increasing energy demand for cooling purposes. In Egypt, the energy demand for cooling has been increased due to the increase in air temperature all over the republic. So, it became a very important issue to find a passive climatic solution. Phase Changing Materials (PCMs) considered as the best solution to decrease energy demand for cooling. Most international companies are currently competing in supporting the production of panels and rolls which depend on the integration with PCMs. This study depends on Design Builder software to evaluate the effect of Bio PCM Q23 and Bio PCM Q25 on energy consumption reduction. It was found that Bio PCM Q23 reduces the energy demand for cooling with an acceptable effectiveness percentage between 15.06% and 35.93% when combined with the building envelope, while the effectiveness of Bio PCM Q25 is between 18.93% to 97.93% when combined with the same building envelope.
Phase Change Materials
Energy efficiency
Building envelope
Design Builder
2020
03
01
302
316
https://jesaun.journals.ekb.eg/article_135257_44afa0e0edd7f8a1191ea83a97ced889.pdf
JES. Journal of Engineering Sciences
1687-0530
1687-0530
2020
48
No 2
URBAN LANDSCAPE POTENTIAL TO SUSTAIN ARCHITECTURAL DEVELOPMENT, CASE-STUDY: MOHARAM-PASHA COMPOUND, ALEXANDRIA, EGYPT
Pakinam
Nabil Barakat
Sustainability is considered a leading term through various world aspects like architecture, transportation, manufacturing and business. It guaranteed the continuity of many fields by protecting the natural environment from harmful human interferences for their own comfort, without recognizing that most of their energy consuming solutions are in fact leading to many universal changes that threaten the ecological equilibrium of the world. Furthermore, urban landscape Architecture allows the architect to create green cities where the built and the natural environments are interwoven. Therefore, by combining the previous terms together, sustainable landscape architecture will be formed and will achieve balance between buildings and their inhabitants that in return will lead to sustainable development in cities and the whole world. The paper analyzes sustainability from an environmental point of view and then a focus is undertaken on landscape planning, environmental impact design and sustainable development. Furthermore, there will be a review for keywords’ definitions, landscape elements and the route to sustainable cities. Finally, the researcher combines together the principles of sustainable urban landscape and those for sustainable development, leading to a new methodology that will not only enhance the landscape ecological performance in urban spaces, but will also protect habitats and strengthen their sense of belonging and identity. Finally, this new vision will be applied on a casestudy, Moharam Pasha Compound in Alexandria, showing how it will enhance inhabitants’ life and achieve environmental, economic, aesthetic, social and psychological Benefits.
Urban landscape
Landscape architecture
Sustainable Development
2020
03
01
317
327
https://jesaun.journals.ekb.eg/article_135260_536f766d3d2548be1b42e266dc9b2cd7.pdf