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Articles 116731 - 116760 of 1114316
Full-Text Articles in Entire DC Network
Comparison Between Methods For Estimating Length Of G.V.F. Curves In Mild Circular Open Channel With Experimental Length, Amal Mohammed Naeem, Ebrahim Rashwan, Mossad Khadr
Comparison Between Methods For Estimating Length Of G.V.F. Curves In Mild Circular Open Channel With Experimental Length, Amal Mohammed Naeem, Ebrahim Rashwan, Mossad Khadr
Journal of Engineering Research
Abstract- A gradually varied flow computation is important for the design of water structures. To design dimensions of channels, examining the depth of water in a gradually varied flow is required. In this study, experiments study were performed to evaluate different methods for calculating the lengths of gradually varied flow curves in mild slope circular open channel. The study was performed in a circular flume with an inner diameter equal to 24.40 cm with a mild slope equal to 0.00083 for different discharges from 2.38 l/sec to 14.08 l/sec. The objective of this study is to compare water surface profiles …
تأثير المرونة التصميمية علي المباني السکنية دراسة حالة :"منزل جيريت ريتفلد", Nataly Nabil Rizk
تأثير المرونة التصميمية علي المباني السکنية دراسة حالة :"منزل جيريت ريتفلد", Nataly Nabil Rizk
Journal of Engineering Research
أصبحت المرونة هي "المجال المعماري الذي يهتم باستمرارية عمل المبنى أو المنشأة رغم تغير الاشتراطات الوظيفية، من خلال إعادة تشکيله بحيث يستطيع الاستمرار بتلبية المتطلبات الجديدة.يرجع الهدف الأساسي للبحث الي اقتراح حلول تصميمية تحقق المرونة في المسکن للاستجابة لتغير الاحتياجات والمتطلبات من وقت إلى آخر فيه، بحيث يفهم التغيير والتجديد على أنه إمکانية إعادة التشکيل بشکل منظَّم لاختيار الخيار الأفضل الذي يساعد على إيجاد حلول مرنة وعصرية تلبي احتياجات المستخدمين المتغيرة ونشاطاتهم الجديدة بشکل متزامن ومتوافق معها، وذلک من خلال وضع بدائل متنوعة على المستوى الوظيفي.تم تطبيق المنهج التحليلي في دراسة منزل شرودر في أوتريخيت بهولندا و الذي تم تصميمه …
العوامل المؤثرة على التنمية المستدامة للفراغات العمرانية التجارية التقليدية, Hagar Aboelyazed Almetaher, أيمن جمال الدین عبد التواب, انجي ابراهيم الدرويش
العوامل المؤثرة على التنمية المستدامة للفراغات العمرانية التجارية التقليدية, Hagar Aboelyazed Almetaher, أيمن جمال الدین عبد التواب, انجي ابراهيم الدرويش
Journal of Engineering Research
إن عمليات التنمية العمرانية لبعض الفراغات التجارية تواجهه مجموعة من المشاکل التي يمکن ارجاع اسبابها الى التطور الاجتماعي والاقتصادي وغياب الوعي بأهمية التراث العمراني داخل هذه الفراغات التجارية وعدم وجود تمويل لازم وغياب الحماية القانونية وغياب مشارکة المجتمع وعدم وضع اليات ملائمة تساهم في زيادة مشارکة المجتمع المحلى والقطاع الخاص في عملية التنمية لذلک فان البحث يوضيح الإشکالية البحثية والعمل على وضع بعض الأهداف الرئيسية في نطاق تحقيق تطور لبعض الفراغات العمرانية التجارية التقليدية بشکل مستدام و يعتمد البحث على (Qualitative method) حيث يرکز على عرض المفاهيم والأفکار الخاصة بالاستدامة والحفاظ العمراني ، ودراسة مفاهيم خاصه بتنمية الفراغات العمرانية التجارية …
Behaviour Of Extended Endplate Connection With Mild And High Strength Steel, Sarah Ali Yousef, Omnia Kharoup, Mahmoud H. El-Boghdadi
Behaviour Of Extended Endplate Connection With Mild And High Strength Steel, Sarah Ali Yousef, Omnia Kharoup, Mahmoud H. El-Boghdadi
Journal of Engineering Research
This paper uses the multi-purpose software ABAQUS to create a three-dimensional finite element model of an extended end plate connection to analyze and compare the behaviour of mild steel and high-strength steel endplate connections. The numerical model's results are calibrated against reported experimental results to ensure that it can simulate and analyze both the overall and detailed behaviour of different types of bolted endplate steel connections. The results of the study compare and analyze the moment-rotation relationships and the behaviour characteristics of the connection with mild steel and high strength steel. Upon validation of the FE models' parametric studies were …
ااستراتيجية تصميم وتنفيذ الجداريات بشکل نسقي داخل الاطار العمراني والمعماري, Rowida Abdalhakem Abo Zaid, Hosny Dewair, Ahmed Rizk
ااستراتيجية تصميم وتنفيذ الجداريات بشکل نسقي داخل الاطار العمراني والمعماري, Rowida Abdalhakem Abo Zaid, Hosny Dewair, Ahmed Rizk
Journal of Engineering Research
Abstract:Murals have been associated with architecture and urbanism throughout human history with its various civilizations, It does not represent an addition to the architectural and urban entity but it enters the heart of their fabric and participates primarily in their formation and style, The architectural entity or the urban space may derive its importance from what the murals offer from different themes that make them have the ability to change the sense of the dimensions of the spatial space and its feeling completely differently than if the walls were barren and devoid of them, As entities, they are considered one …
Behavior Of Two Parallel Strip Footings On A Sand Cushion Over Clay, Mostafa El Sawwaf, Ashraf Nazir, Ahmed Farouk, Shimaa Saied Hashish
Behavior Of Two Parallel Strip Footings On A Sand Cushion Over Clay, Mostafa El Sawwaf, Ashraf Nazir, Ahmed Farouk, Shimaa Saied Hashish
Journal of Engineering Research
In this paper, the behavior of two parallel strip footings resting on the surface of a semi-infinite clay is investigated. The effect of stress interference on bearing capacity and settlement are studied using the finite element program PLAXIS 2D. The clay is stimulated using the Mohr-Coulomb soil model that follows linear-elastic perfectly plastic behavior. A parametric study is performed for different clear spacing between the footings. The paper also investigates the effect of existence of a sand cushion as well as the existence of a layer of geogrid inside the cushion below the clay; on the stress-settlement relationship, and the …
Modified Canny Detector-Based Active Contour For Segmentation, Radwa Alaa Salah, Hussein Seleem, Amira S. Ashour
Modified Canny Detector-Based Active Contour For Segmentation, Radwa Alaa Salah, Hussein Seleem, Amira S. Ashour
Journal of Engineering Research
In the present work, an integrated modified canny detector and an active contour were proposed for automated medical image segmentation. Since the traditional canny detector (TCD) detects only the edge’s pixels, which are insufficient for labelling the image, a shape feature was extracted to select the initial region of interest ‘IROI’ as an initial mask for the active contour without edge (ACWE), using a proposed modified canny detector (MCD). This procedure overcomes the drawback of the manual initialization of the mask location and shape in the traditional ACWE, which is sensitive to the shape of region of region of interest …
Shear Behavior Of High-Performance Reinforced Concrete Beams, Eman Wehdan, Salah Taher, Hamdy Afefy, Nesreen Kassem
Shear Behavior Of High-Performance Reinforced Concrete Beams, Eman Wehdan, Salah Taher, Hamdy Afefy, Nesreen Kassem
Journal of Engineering Research
High-performance concrete (HPC) is one of such new material that has a major improvement over conventional concrete; however, its behavior has to be fully understood. This paper presents experimental and numerical investigations in order to study the shear behavior of high-performance reinforced concrete beams. Four RC-HPC beams were tested experimentally in order to study the effect of the existence of web reinforcement and bar diameter of the web reinforcement as well as the amount of the tensile longitudinal steel bars on the shear behavior. Test results showed higher values of shear strength, stiffness, ductility and controlled the concrete cracking behavior …
Comparison Of Egyptian And English Mediation Procedures In Construction, Ahmed Swelam, Adel Ibrahim Eldosouky, Tamer Mostafa El Korany
Comparison Of Egyptian And English Mediation Procedures In Construction, Ahmed Swelam, Adel Ibrahim Eldosouky, Tamer Mostafa El Korany
Journal of Engineering Research
The mediation process is the parties' will to the dispute to reach an amicable, non-binding settlement to end their dispute. The Egyptian legislature adopted the idea of issuing a draft law on mediation in civil and commercial matters to settle disputes between the parties, whether before the litigation stage or after appearing before the courts. The Egyptian Ministry of Justice held many community dialogue sessions to find the final version of the draft law. However, the concerned authorities have not issued the law until writing this paper. This research aims to compare and analyze the Egyptian mediation procedures and the …
Geotechnical Behaviour Of Reinforced Soft Clay By Marble Dust As A Waste Material, Mohamed Nabil Elsiragy
Geotechnical Behaviour Of Reinforced Soft Clay By Marble Dust As A Waste Material, Mohamed Nabil Elsiragy
Journal of Engineering Research
Civil engineers around the world are in search of new alternative resources which are required both for cost-effective solutions for ground improvement and conservation of scarce natural resources. The various methods of ground improvement currently in use include lime columns, stone columns, use of chemical stabilizers, and various kinds of inclusions like metal strips, mats, fibres, geosynthetics, etc. The cost of these virgin materials as well as the processes involved is usually high and as such, they are yet to be commonly used in developing foundation performances. This paper illustrates the application of using marble dust stabilization in improving the …
تأثير المرونة التصميمية علي المباني السکنية دراسة حالة :"منزل جيريت ريتفلد", Nataly Nabil Rizk
تأثير المرونة التصميمية علي المباني السکنية دراسة حالة :"منزل جيريت ريتفلد", Nataly Nabil Rizk
Journal of Engineering Research
أصبحت المرونة هي "المجال المعماري الذي يهتم باستمرارية عمل المبنى أو المنشأة رغم تغير الاشتراطات الوظيفية، من خلال إعادة تشکيله بحيث يستطيع الاستمرار بتلبية المتطلبات الجديدة.يرجع الهدف الأساسي للبحث الي اقتراح حلول تصميمية تحقق المرونة في المسکن للاستجابة لتغير الاحتياجات والمتطلبات من وقت إلى آخر فيه، بحيث يفهم التغيير والتجديد على أنه إمکانية إعادة التشکيل بشکل منظَّم لاختيار الخيار الأفضل الذي يساعد على إيجاد حلول مرنة وعصرية تلبي احتياجات المستخدمين المتغيرة ونشاطاتهم الجديدة بشکل متزامن ومتوافق معها، وذلک من خلال وضع بدائل متنوعة على المستوى الوظيفي.تم تطبيق المنهج التحليلي في دراسة منزل شرودر في أوتريخيت بهولندا و الذي تم تصميمه …
العوامل المؤثرة على التنمية المستدامة للفراغات العمرانية التجارية التقليدية, Hagar Aboelyazed Almetaher, أيمن جمال الدین عبد التواب, انجي ابراهيم الدرويش
العوامل المؤثرة على التنمية المستدامة للفراغات العمرانية التجارية التقليدية, Hagar Aboelyazed Almetaher, أيمن جمال الدین عبد التواب, انجي ابراهيم الدرويش
Journal of Engineering Research
إن عمليات التنمية العمرانية لبعض الفراغات التجارية تواجهه مجموعة من المشاکل التي يمکن ارجاع اسبابها الى التطور الاجتماعي والاقتصادي وغياب الوعي بأهمية التراث العمراني داخل هذه الفراغات التجارية وعدم وجود تمويل لازم وغياب الحماية القانونية وغياب مشارکة المجتمع وعدم وضع اليات ملائمة تساهم في زيادة مشارکة المجتمع المحلى والقطاع الخاص في عملية التنمية لذلک فان البحث يوضيح الإشکالية البحثية والعمل على وضع بعض الأهداف الرئيسية في نطاق تحقيق تطور لبعض الفراغات العمرانية التجارية التقليدية بشکل مستدام و يعتمد البحث على (Qualitative method) حيث يرکز على عرض المفاهيم والأفکار الخاصة بالاستدامة والحفاظ العمراني ، ودراسة مفاهيم خاصه بتنمية الفراغات العمرانية التجارية …
Behaviour Of Extended Endplate Connection With Mild And High Strength Steel, Sarah Ali Yousef, Omnia Kharoup, Mahmoud H. El-Boghdadi
Behaviour Of Extended Endplate Connection With Mild And High Strength Steel, Sarah Ali Yousef, Omnia Kharoup, Mahmoud H. El-Boghdadi
Journal of Engineering Research
This paper uses the multi-purpose software ABAQUS to create a three-dimensional finite element model of an extended end plate connection to analyze and compare the behaviour of mild steel and high-strength steel endplate connections. The numerical model's results are calibrated against reported experimental results to ensure that it can simulate and analyze both the overall and detailed behaviour of different types of bolted endplate steel connections. The results of the study compare and analyze the moment-rotation relationships and the behaviour characteristics of the connection with mild steel and high strength steel. Upon validation of the FE models' parametric studies were …
ااستراتيجية تصميم وتنفيذ الجداريات بشکل نسقي داخل الاطار العمراني والمعماري, Rowida Abdalhakem Abo Zaid, Hosny Dewair, Ahmed Rizk
ااستراتيجية تصميم وتنفيذ الجداريات بشکل نسقي داخل الاطار العمراني والمعماري, Rowida Abdalhakem Abo Zaid, Hosny Dewair, Ahmed Rizk
Journal of Engineering Research
Abstract:Murals have been associated with architecture and urbanism throughout human history with its various civilizations, It does not represent an addition to the architectural and urban entity but it enters the heart of their fabric and participates primarily in their formation and style, The architectural entity or the urban space may derive its importance from what the murals offer from different themes that make them have the ability to change the sense of the dimensions of the spatial space and its feeling completely differently than if the walls were barren and devoid of them, As entities, they are considered one …
Behavior Of Two Parallel Strip Footings On A Sand Cushion Over Clay, Mostafa El Sawwaf, Ashraf Nazir, Ahmed Farouk, Shimaa Saied Hashish
Behavior Of Two Parallel Strip Footings On A Sand Cushion Over Clay, Mostafa El Sawwaf, Ashraf Nazir, Ahmed Farouk, Shimaa Saied Hashish
Journal of Engineering Research
In this paper, the behavior of two parallel strip footings resting on the surface of a semi-infinite clay is investigated. The effect of stress interference on bearing capacity and settlement are studied using the finite element program PLAXIS 2D. The clay is stimulated using the Mohr-Coulomb soil model that follows linear-elastic perfectly plastic behavior. A parametric study is performed for different clear spacing between the footings. The paper also investigates the effect of existence of a sand cushion as well as the existence of a layer of geogrid inside the cushion below the clay; on the stress-settlement relationship, and the …
Modified Canny Detector-Based Active Contour For Segmentation, Radwa Alaa Salah, Hussein Seleem, Amira S. Ashour
Modified Canny Detector-Based Active Contour For Segmentation, Radwa Alaa Salah, Hussein Seleem, Amira S. Ashour
Journal of Engineering Research
In the present work, an integrated modified canny detector and an active contour were proposed for automated medical image segmentation. Since the traditional canny detector (TCD) detects only the edge’s pixels, which are insufficient for labelling the image, a shape feature was extracted to select the initial region of interest ‘IROI’ as an initial mask for the active contour without edge (ACWE), using a proposed modified canny detector (MCD). This procedure overcomes the drawback of the manual initialization of the mask location and shape in the traditional ACWE, which is sensitive to the shape of region of region of interest …
Shear Behavior Of High-Performance Reinforced Concrete Beams, Eman Wehdan, Salah Taher, Hamdy Afefy, Nesreen Kassem
Shear Behavior Of High-Performance Reinforced Concrete Beams, Eman Wehdan, Salah Taher, Hamdy Afefy, Nesreen Kassem
Journal of Engineering Research
High-performance concrete (HPC) is one of such new material that has a major improvement over conventional concrete; however, its behavior has to be fully understood. This paper presents experimental and numerical investigations in order to study the shear behavior of high-performance reinforced concrete beams. Four RC-HPC beams were tested experimentally in order to study the effect of the existence of web reinforcement and bar diameter of the web reinforcement as well as the amount of the tensile longitudinal steel bars on the shear behavior. Test results showed higher values of shear strength, stiffness, ductility and controlled the concrete cracking behavior …
Comparison Of Egyptian And English Mediation Procedures In Construction, Ahmed Swelam, Adel Ibrahim Eldosouky, Tamer Mostafa El Korany
Comparison Of Egyptian And English Mediation Procedures In Construction, Ahmed Swelam, Adel Ibrahim Eldosouky, Tamer Mostafa El Korany
Journal of Engineering Research
The mediation process is the parties' will to the dispute to reach an amicable, non-binding settlement to end their dispute. The Egyptian legislature adopted the idea of issuing a draft law on mediation in civil and commercial matters to settle disputes between the parties, whether before the litigation stage or after appearing before the courts. The Egyptian Ministry of Justice held many community dialogue sessions to find the final version of the draft law. However, the concerned authorities have not issued the law until writing this paper. This research aims to compare and analyze the Egyptian mediation procedures and the …
Geotechnical Behaviour Of Reinforced Soft Clay By Marble Dust As A Waste Material, Mohamed Nabil Elsiragy
Geotechnical Behaviour Of Reinforced Soft Clay By Marble Dust As A Waste Material, Mohamed Nabil Elsiragy
Journal of Engineering Research
Civil engineers around the world are in search of new alternative resources which are required both for cost-effective solutions for ground improvement and conservation of scarce natural resources. The various methods of ground improvement currently in use include lime columns, stone columns, use of chemical stabilizers, and various kinds of inclusions like metal strips, mats, fibres, geosynthetics, etc. The cost of these virgin materials as well as the processes involved is usually high and as such, they are yet to be commonly used in developing foundation performances. This paper illustrates the application of using marble dust stabilization in improving the …
Hydrological Study Of Groundwater And Its Appropriateness For Irrigation, Karim B H, Hussein S Elsharkawy
Hydrological Study Of Groundwater And Its Appropriateness For Irrigation, Karim B H, Hussein S Elsharkawy
Journal of Engineering Research
Irrigation in most countries represents the largest share of all water use. Groundwater is the main water resource after the water of the Nile River in Egypt. The water situation in the future is not optimistic due to the economic development, the increase in population growth and the increase in the agricultural area, especially after the completion of the construction of Ethiopian Renaissance Dam, so suitable alternatives must be provided for irrigation water. This paper presents a hydrological study on groundwater for use in irrigation in Assiut, Upper Egypt, so that alternatives can be provided to the Nile River for …
Multinomial Logit Utility Model For Tanta City Transportation System Considering Ridesharing Mode, Ahmed Mohamed Elkafoury, Akram Elsaied Mostafa, Hafez Abbas Afify, Islam Mahmoud Aboelnaga
Multinomial Logit Utility Model For Tanta City Transportation System Considering Ridesharing Mode, Ahmed Mohamed Elkafoury, Akram Elsaied Mostafa, Hafez Abbas Afify, Islam Mahmoud Aboelnaga
Journal of Engineering Research
Recently, ridesharing has been noticed as an effective and sustainable mode of transport. In which, each passenger carries out a journey that benefits travelers and society greatly, such as reducing travel costs, reducing journey times, relieving road traffic congestions, preserving fuel and reducing air pollution. While the importance and efficiency of ridesharing, ridesharing among travelers has not been commonly utilized. This paper introduces an upgraded disaggregated utility model for a mode choice step in the four-step traffic demand model for transport of passengers in Tanta city - Gharbiya governorate. For the first time, the analysis in this paper includes ridesharing …
Study Of Unconventional Alternatives To Vertical Breakwater, Karim B H, Mohamed Ibrahim
Study Of Unconventional Alternatives To Vertical Breakwater, Karim B H, Mohamed Ibrahim
Journal of Engineering Research
The main objective of the breakwaters is to protect the port, the beach or the beach facilities from strong waves and storms, as they help to establish calm inside the port and thus achieve safety for ships, and ease of operation. This research aims to present study unconventional alternatives to vertical breakwater. In this study, two different models of vertical wave barriers implemented were chosen for their study and evaluation of the hydrodynamic performance. The first model is a vertical wall with circular slots and the second model is a vertical wall with square slots. A comparison was made between …
Behaviour Of Laterally Anchored Retaining System In Loose Sand Soil, Aml Elbahkery, Mostafa Alsawwaf, Ashraf Nazir, Wasiem R. Azzam
Behaviour Of Laterally Anchored Retaining System In Loose Sand Soil, Aml Elbahkery, Mostafa Alsawwaf, Ashraf Nazir, Wasiem R. Azzam
Journal of Engineering Research
One of the earliest earth retention technologies used in civil engineering projects is sheet pile walls. Therefore, in this work, a numerical analysis using Plaxis 2D was performed to investigate the behaviour of laterally anchored retaining system in sandy soil, focusing on the anchor force, lateral displacement, and maximum bending moment. The effects of anchor location and number on wall and soil deformations were investigated for various wall heights. When anchored-sheet-piles were used instead of cantilever sheet piles, the results showed a significant reduction in both wall deformation and bending moment specially at high dredging levels. In addition, while having …
Vibration Control For A Coupled Pitch- Roll Ship Model Via A Negative Cubic Velocity Feedback Control, Y. A. Amer, Taher A. Bahnasy, Ashraf M. Elmhalawy
Vibration Control For A Coupled Pitch- Roll Ship Model Via A Negative Cubic Velocity Feedback Control, Y. A. Amer, Taher A. Bahnasy, Ashraf M. Elmhalawy
Journal of Engineering Research
One of the most essential ship reactions to waves is roll motion. Due to the intricacy of ship wave interactions and their sensitivity, predicting such a reaction is extremely challenging. Because vibration motion is an undesirable occurrence, it must be removed, decreased, or controlled. A coupled Pitch- roll ship model with negative cubic velocity feedback control subjected to parametric excitations is premeditated and solved in this paper. The method of multiple time scales is applied to scrutinize the response of the two modes of the system neighbouring the simultaneous sub-harmonic, and internal resonance situation. Besides, the steady-state solution is determined …
Shear Strength Characteristics Of Cemented Clayey Sand Soil, Mona Hossien Bayoumy, Mostafa Alsawwaf, Ahmed Mohamed Nasr
Shear Strength Characteristics Of Cemented Clayey Sand Soil, Mona Hossien Bayoumy, Mostafa Alsawwaf, Ahmed Mohamed Nasr
Journal of Engineering Research
Several techniques of soil stabilization are available to improve the behavior of many types of soil. The addition of cement to soils have proved a significant effect on the geotechnical properties of treated soils. In this study, an artificial clayey sand soil samples were prepared by mixing 20% kaolin clay of fine sand. Initially, compaction tests were conducted on soil mixture to study the effect of kaolin addition on maximum dry density, optimum moisture content of mixed soil at a relative density of 55%. The mixed soils were improved by cement. Then ,a series of unconfined compression tests were performed …
Technical And Economical Investigation Of Renewable Energy Sources For Supplying Offshore Oil Production Facilities At Gulf Of Suez Area, Mohamed K. El-Nemr, Belal S. Farrag, Samir Dawoud
Technical And Economical Investigation Of Renewable Energy Sources For Supplying Offshore Oil Production Facilities At Gulf Of Suez Area, Mohamed K. El-Nemr, Belal S. Farrag, Samir Dawoud
Journal of Engineering Research
The Gulf of Suez is highly susceptible to economic and energy security due to the heavy need for imported fossil fuels. The energy produced from fossil fuels causes serious environmental pollution. So, it is important to find other clean sources of energy for stabilizing the released amount of carbon dioxide. Gulf of Suez has the potential to develop clean Solar Photovoltaic (PV) and wind systems to improve economic and environmental performance. This paper proposes a combination of floating solar panels (FSP) and offshore wind turbines to solve the main critical issues, such as the land area required for a large …
Nonrigid Medical Image Registration Using Adaptive Gradient Optimizer, Mohammed Abdel Rhman Abo Arab, Heba Ali El-Khobby, Amira S. Ashour
Nonrigid Medical Image Registration Using Adaptive Gradient Optimizer, Mohammed Abdel Rhman Abo Arab, Heba Ali El-Khobby, Amira S. Ashour
Journal of Engineering Research
Medical image registration has a significant role in several applications. It has sequential processes, including transformation, similarity metric calculation, diffusion regularization, and optimization of the transformation parameters (i.e., rotation, translation, and shear). The optimization process for determining the optimal set of the transformation vectors is considered the main stage affecting the performance of the registration process. Hence, medical image registration can be deliberated as an optimization problem for computing the geometric transformations to realize maximum similarity between the moving image and the fixed one. In this work, a mono-modal nonrigid image registration using B-spline is designed for the alignment of …
Thermal Analysis Of A Hybrid Air Conditioning System With Geothermal Energy, Shaimaa Mohamed El-Hetamy, Alsaid Khalil, S. A. El-Agouz, Mohamed Samadony
Thermal Analysis Of A Hybrid Air Conditioning System With Geothermal Energy, Shaimaa Mohamed El-Hetamy, Alsaid Khalil, S. A. El-Agouz, Mohamed Samadony
Journal of Engineering Research
Hybrid air conditioning systems can allow significant energy saving and emissions reductions with respect to conventional air-conditioning systems. Thermal analysis of a desiccant wheel, a heat exchanger, a ground source circulation system, and a solar collector for a hybrid air conditioning system is performed in this study. The effects of these parameters have been studied: Inlet air temperature, Inlet air humidity ratio, wheel speed, regeneration temperature, regeneration mass flowrate, heat exchanger effectiveness, ground source circulation effectiveness, and solar radiation on the behavior of the outlet air temperature and the outlet air humidity ratio from the desiccant wheel, the area of …
Gaxin2-Xo3 Surface Pyramids Interaction With Formaldehyde: Thermodynamic And Sensing Analysis, Mudar Ahmed Abdulsattar
Gaxin2-Xo3 Surface Pyramids Interaction With Formaldehyde: Thermodynamic And Sensing Analysis, Mudar Ahmed Abdulsattar
Karbala International Journal of Modern Science
GaxIn2-xO3 surface pyramids' electronic structures are investigated using density functional theory, including dispersion corrections. Application of GaxIn2-xO3 surface pyramids as a gas sensor for formaldehyde is also performed and compared with experimental findings. These findings show that the energy gap of these pyramids follows closely with the bulk values. The energy gap increases between the two limits, In2O3 and Ga2O3. Applying GaxIn2-xO3 surface pyramids as a gas sensor uses transition state theory formalism. Thermodynamic quantities such as activation Gibbs energy, enthalpy, and entropy are needed for temperature-dependent calculations. A comparison of sensor response which is proportional to reaction rate as …
Reducing Uncertainty In Sea-Level Rise Prediction: A Spatial-Variability-Aware Approach, Subhankar Ghosh, Shuai An, Arun Sharma, Jayant Gupta, Shashi Shekhar, Aneesh Subramanian
Reducing Uncertainty In Sea-Level Rise Prediction: A Spatial-Variability-Aware Approach, Subhankar Ghosh, Shuai An, Arun Sharma, Jayant Gupta, Shashi Shekhar, Aneesh Subramanian
I-GUIDE Forum
Given multi-model ensemble climate projections, the goal is to accurately and reliably predict future sea-level rise while lowering the uncertainty. This problem is important because sea-level rise affects millions of people in coastal communities and beyond due to climate change's impacts on polar ice sheets and the ocean. This problem is challenging due to spatial variability and unknowns such as possible tipping points (e.g., collapse of Greenland or West Antarctic ice-shelf), climate feedback loops (e.g., clouds, permafrost thawing), future policy decisions, and human actions. Most existing climate modeling approaches use the same set of weights globally, during either regression or …