Engineering Commons^™

Real-Time Scheduling Method For Dynamic Flexible Job Shop Scheduling, Quan Jiang, Jingxuan Wei

Journal of System Simulation

Abstract: A multi-objective dynamic flexible job shop scheduling problem model with machine breakdown and random jobs arrival is constructed to address the interference of dynamic events in manufacturing processing on the scheduling scheme, and a real-time scheduling method with multiobjective proximal policy optimization (MPPO) algorithm is proposed. The MPPO algorithm trains two agents, routing agent (RA) and sequencing agent (SA), for real-time scheduling and real-time processing of dynamic events. It employs a linear combination of weight vectors and reward vectors as reward signals and stores the agents' parameters for each weight vector to optimize multiple objectives. The required state information, …

Path Planning For Mobile Robot Based On Angle Search, Yaru Wang, Dexin Yao, Zengli Liu, Yi Peng

Journal of System Simulation

Abstract: The angle search algorithm for angle-controlled robots is proposed to increase the path search speed and optimize the path length. The algorithm effectively finds a path in static surroundings by performing an efficient search in a specific dimensional range based on the position of the robot and the target point. Firstly, search angles are predetermined according to the characteristics of the environment in the grid map. Then, the estimated angle of the robot's surrounding grid is computed. Finally, a new extension point is chosen by comparing the estimated angle to the search angle, demonstrating the usefulness and viability of …

Digital Application Of Equipment System Test And Evaluation Based On Digital Twin And Parallel Experiment Theory, Hongjie Dang, Wenguang Yu, Huahui Yang

Journal of System Simulation

Abstract: With the development of equipment systematization, traditional test with real equipment can not meet the requirements of Test and Evaluation(T&E), especially for complex equipment. As the main digital methods in current, digital twins and parallel experiments can support the digital application in the field of equipment Test and Evaluation. This paper makes a comparative analysis of the two digital technology means, extracts their technical connotation and characteristics, and then integrates them to explore the application mode, application time and application occasions in the field of equipment T&E. Taking the satellite for example, by constructing the digital architecture of equipment …

Interaction Between Virus Transmission Variation And Population Crossover Activity And Diffusion Model, Lei Yu, Xichou Zhu, Huaming Liao, Jiafeng Guo, Xueqi Cheng

Journal of System Simulation

Abstract: In view of the current high incidence of human-to-human infectious viruses, a multi-agent simulation and deduction model was proposed and designed based on the random characteristics of virus transmission variation and the influence of population crossover activity. The external pathogenicity and infectious characteristics of the virus and the external activities and immune characteristics of the human were quantified, and the interdependence and confrontation process between the virus and the human were modeled. The development trends and statistical characteristics of a large number of viruses and humans were deduced through the model. The experimental analysis reveals that the randomness of …

3d Printing Of Local New Mexican Soil Material: Improving Durability Properties By Assessing Traditional Methods Towards Alternative Sustainable Construction, Daiquiri Devon Zozaya

Civil Engineering ETDs

3D printing (3DP), or additive manufacturing, represents a dynamic and swiftly advancing manufacturing method in which diverse materials are deposited layer by layer through computer-controlled processes, creating intricate geometries. This technology has demonstrated success in various construction applications, including the construction of bridges, bus stop stations, and even residential homes. Nonetheless, the predominant application of 3DP in construction relies heavily on cement due to its robustness, convenience, and ease of use. Regrettably, the cement sector is a substantial source of greenhouse gas emissions, responsible for approximately 8% of worldwide CO₂ emissions. Investigating all facets of carbon emissions reduction is …

Building A Trusted Relationship Among Project Participants In Construction Projects On Tribal Land, Dominica J. Bennett

Civil Engineering ETDs

There are 574 federally recognized tribes in the United States, and these tribal communities differ by culture, language, history, and self-governance. Performing a tribal construction project is different than a non-tribal project due to tribal sovereignty, tribes are both legally and regulatory independent. The United States has recognized its trust with Indigenous tribes through treaties, statutes, and historical relations, however treaties and statutes have been broken over time. This paper aims to qualitatively and quantitatively identify relationships and trust built between contractors, designers, and owners on construction projects while identifying challenges. The methodology involves survey distribution to rank the level …

Effect Of Air Filtration On Water Quality During Atmospheric Water Harvest In The Southwest United States, A.J. Barney

Civil Engineering ETDs

Access to sustainable drinking water is a concern across the globe. Atmospheric water harvest (AWH) offers a potential supplemental drinking water source. However, the sources and processes affecting AWH water quality are not well understood and must be thoroughly studied to consistently utilize AWH for drinking water. The objective of this research is to assess how removing particulate matter (PM) 2.5 and PM10 in the air used to produce AWH with air-filters affects the water quality of AWH. AWH samples were collected simultaneously with three identical dehumidifiers, utilizing three different air-filter configurations (no-filter, MERV8, and MERV12) in Albuquerque, NM from …

Exploration Of Semiconductor Gain Medium, Resonator, Pump, And Frequency Stabilization For Laser Guide Star Applications, Mingyang Zhang

Optical Science and Engineering ETDs

Laser Guide Star (LGS) systems are essential for adaptive optics in ground-based astronomical observation. This dissertation demonstrates the feasibility of semiconductor-based LGS systems using the membrane external-cavity surface-emitting laser (MECSEL) platform, employing multiple quantum wells. Various laser cavity configurations were analyzed through simulations and experiments. The in-well pumping method was explored to reduce the quantum defect and address thermal limitations. Multi-pass pumping schemes were designed with Zemax modeling and demonstrated experimentally. To simplify multi-pass pumping, the hybrid-MECSEL (H-MECSEL) design was introduced. COMSOL modeling studied thermal management and thermal lensing effect.

The H-MECSEL achieved approximately 30 W of output power at …

Insight Into Complexity: Novel Information Theoretic Analysis Of Spatiotemporal Interactions, Humayra Tasnim

Computer Science ETDs

Complex systems are comprised of different components. Interactions and associations among these components define the functionality of the system. For example, T cells must directly interact with virally infected cells to kill them. This research characterizes the most relevant components of complex systems by analyzing interacting relationships using information theoretic measures. It emphasizes the importance of spatial and temporal dynamics, which occur when components share spatial proximities or temporal sequences. Novel information theoretic analyses are proposed for quantifying the degree of association among system components, which is key to defining the spatiotemporal dynamics. One focus of this work is the …

Experimental Investigations On The Flow Boiling And Heat Transfer Characteristics During Chilldown Process In A Closed Loop Chilldown Test Section, Jayachandran K. Narayanan, Jason W. Hartwig, Mohammad Kassemi, Chirag R. Kharangate

Faculty Scholarship

In this study, closed loop chilldown experiments are performed on a 0.009525 m outer diameter SS-316 tube of length 0.6 m and thickness 0.001651 m in a horizontal flow configuration with PF-5060 as the working fluid. The challenges associated with the development of a closed loop chilldown test section in comparison with conventional open loop cryogenic chilldown experiments are discussed and the methods to overcome this are presented. The test section tube is heated to around 246–249 °C to perform the chilldown tests and the film, transition and nucleate boiling regimes along with the single phase liquid convective regimes are …

Blast Wave Simulator For Laminated Glass Panels Experimental Evaluation, Mahmoud T. Nawar, Ayman El-Zohairy, Alaa El-Sisi, Hani Salim

Faculty Publications

The study of blast loads on structures is important due to the potential of significant consequences in various scenarios. From terrorist attacks to industrial accidents, comprehending how structures respond to blast waves is critical for ensuring public safety and designing resilient structures. Studying these effects typically involves two main methods: free-field tests with live explosives and shock tube tests. Although shock tube testing offers certain advantages, both approaches are costly and demand significant space. This research aims to develop a cost-effective and straightforward technique for generating stress waves that closely replicate the progressive and spatial characteristics of free-field or shock …

Caring: Cannula For Alleviation Of Retinal Injury Caused By Needle Fluidic Gashing, Kaersti L. Rickels, Anthony L. Gunderman, Mattie S. Mclellan, Muhhamad M. Shamim, Joseph A. Sanford, Sami H. Uwaydat

Mechanical Engineering Faculty Publications and Presentations

Infusion-related iatrogenic retinal breaks (IRBs) are a significant complication in vitrectomies, particularly when smaller-gauge cannulas are used during fluid infusion. Using two-dimensional finite element analysis (FEA), we analyzed forces exerted on the retina from different cannulas: traditional 25-gauge, 20-gauge, 23-gauge, and 27-gauge, then investigated four alternative new cannula designs: (A) oblique orifices, (B) external obstruction, (C) side ports, and (D) perpendicular orifices. The analysis revealed that the standard 25-gauge cannula had a force of 0.546 milli-Newtons (mN). Optimized cannulas demonstrated decreased forces: 0.072 mN (A), 0.266 mN (B), 0.417 mN (C), and 0.117 mN (D). While all the designs decrease …

Decision-Making Considering Power Consumption And Preference For New Energy Under Dual-Credit Policy, Fang Li, Tianhao Dong

Journal of System Simulation

Abstract: To explore the production decision-making problem of the electrification transformation in the domestic automobile industry faced by automobile manufacturers, different decision-making models under two production scenarios are constructed for the secondary supply chain composed of manufacturers and retailers under the background of a dual-credit policy. The electric energy consumption of new energy vehicles and consumers' preference for new energy are introduced. The Stackelberg game is applied to obtain the optimal production decision and income analysis of each member in the supply chain under different decision modes in different production scenarios. The results show that the in-depth implementation of the …

Employing Interactive Architecture Techniques In Architectural Design Methodologies To Retrieve Ancient Egyptian Identity, Dina Elwy Aly Hamed Hussein Dr. Lobna Abd-Allah Abd-Elfattah Agha , Dr. Azza Sobhi Ragab Elsakka

Journal of Engineering Research

Architectural projects often rely on modern technologies like smart architecture and environmental treatments, neglecting the principles and philosophy that reflect civilization, ideas, culture, and traditions. This leads to short-lived buildings that depend on these technologies without any purpose of preserving them. Technicians must constantly renew technology to improve production and without benefits, as threats of superior artificial intelligence have been warned, that autonomous machines may perform tasks without programmers understanding how to reach this level. Instead of relying solely on environmental or smart technology, we should make technology serve the design idea rather than relying solely on it. Considering this, …

The Effect Of Lighting In Color In The Interior Space Of The Residential Unit, Abd Elbary Eldininy Abd Elbary Eldininy

Journal of Engineering Research

ABSTRACT: Humanity is spending more and more time indoors, both at work and at home - with studies showing that we now spend 87% of our lives indoors. Residential environ ments both positively affect the mood and well-being of its occupants, just as places with poor and uncomfortable lighting and colors can make life miserable. This is why we are interested in this issue. The importance of knowing the issues of lighting and colors in order to obtain a well thought-out interior design. The interior designer has the ability to control in the quality of lighting of various types, artificial …

Green Facade Strategy To Mitigate Heat Islands, Arch. Aya Gamal Abdel Hamid Muhammad Prof. Mai Wahba Madkour... Dr. Rania Elghamry Ashmawy Tolba Elakab

Journal of Engineering Research

In the beginning of the twentieth century and the occurrence of the economic crisis that accompanied by a climate crisis, that one of its indicators the rise in temperatures and the formation of hot zones, especially in crowded cities, including Cairo in particular, as it is considered one of the crowded cities in the world, and this noticeable rise in temperatures in Some areas where hot zones form are called heat islands. This results because of the nature of the urban environment, which has a high building density, little natural landscape, and human and industrial activities that has a negative …

Light Structure Building Technology Towards Sustainable Environmental Design, Sally El-Sayed Prof. Dr. Mai Wahba Madkour2, Prof. Dr. Marwa Ahmed Kamer El-Dawla3

Journal of Engineering Research

The building and construction industry is one of the most important sectors globally , as it plays a vital role in providing housing and infrastructure that meets the needs of various communities , However , this industry is considered one of the largest contributors of negative environmental impacts in terms of consuming huge amounts of natural resources in an unsustainable manner and a subsequent increase in energy consumption .Therefore, it was necessary to find solutions and explore for new and sustainable construction methods to alleviate these problems .This research paper will focus on the use of light buildings and their …

Available Building Technology As A Tool For Developing Construction And Structure Systems., J. Q. . Nader Ibrahim Ismael

Journal of Engineering Research

The research aims to study the impact of available building technology in each era in the development of the constructional thought and implementation techniques used and its impact on the development of different types of buildings, through the emergence of different types of buildings and the development of buildings types in terms of shape and height, through the development of building materials used Whether construction materials or finishing materials, as well as used construction techniques and equipment, and the impact of all on the development of construction thought and construction systems through different eras . The research also represents an …

Increasing Occupancy Rates In Coastal Tourism Development At The Regional Level In Support Of A Sustainable Quality Of Life In Egypt, عبدالرحمن محمد عبدالقادر موسي

Journal of Engineering Research

إن استغلال الفراغات التي تمثل أكثر من 80% من مساحة المنتجعات السياحية الساحلية في الأنشطة الرياضية والترفيهية والثقافية والاجتماعية وتوفير الخدمات المختلفة عن طريق دعم الخدمات الإلكترونية التي تساعد الزائرين في قضاء وقت أكبر بتلك القري السياحية، مع تعلم السباحة وركوب الدرجات والتجديف والتسلق وركوب الخيل دعما لجودة الحياة ، حيث التمتع بالهواء المتجدد القادم من البحر بعيدا عن التلوث والضوضاء، ولزيادة الاستفادة والدعم يتم توفير وحدات فندقة لغير الملاك لزيادة الزوار والاتفاق مع المدارس والجامعات لتنشيط تلك الرحلات للشواطئ وممارسة الأنشطة المميزة لهؤلاء الشباب والاستفادة من الخدمات الجيدة والفراغات الصحية والهواء المتجدد وتعلم الرياضات الشاطئية المفيدة وذلك الاتجاه من …

Green Architecture Strategies To Achieve Sustainability In Buildings, Azza Sobhi Ragab Elsakka J. Q. Assos., Menna Ashraf Saeid Ali

Journal of Engineering Research

في الوقت الحالي توجد حاجة مُلحة لتطبيق معايير الاستدامة التي تعني المحافظة على الموارد الحالية و استخدامها بحيث لا تقل استفادة الأجيال القادمة من تلك الموارد ، و للاستدامة عدة جوانب لتطبيقها أحد تلك التطبيقات هي العمارة الخضراء ، العمارة الخضراء مرت بعدة مراحل بدءاً من القرن السابع عشر ( منذ العصر العثماني الاسلامي ) من خلال وجود بعض الأساليب الغير مباشرة في التصميم التي توفر التهوية و الإضاءة الطبيعية و حتى عصرنا هذا، حيث وُجد تقييم لأداء المبنى الأخضر من حيث أسلوب التصميم و الإنشاء بحيث لا يؤثر على البيئة تأثير سلبي و ما زال التطوير مستمر في إنشاء …

Enhancing Daylight Using Sustainable Natural Lighting Techniques In Modern Architecture, سارة حسني شعلان أ.م.د/ لبني عبد الفتاح أغا

Journal of Engineering Research

Natural lighting is one of the basic criteria for the architectural design process. It is one of the most important data that contributes to the design of architectural spaces and the manifestation of aesthetic values. In light of the global technological development and the scientific and information revolution, the role of the architect comes in highlighting the importance of natural lighting and its positive role in human biology, and reducing effort and psychological pressure in the event of Its use is an alternative to artificial lighting, as it increases human efficiency and achievement at work, in addition to giving a …

The Impact Of Green Infrastructure On Urban Heat Island Phenomenon In Existing Cities, Neveen Youssef Azmy Basant Elsayed Abu-Farrag, Walaa Abou El-Haggag Mehanna

Journal of Engineering Research

Rapid urbanization and overpopulation, along with a lack of green space, led to an increase in air temperature, lowering the rate of thermal comfort in dense urban areas, decreasing air quality, and increasing the urban heat island (UHI) phenomenon, particularly in existing cities. As a result, the research aims to reduce the UHI effect and improve the thermal performance of existing Egyptian cities by adopting green infrastructure (GI) principles and demonstrating their effectiveness on the UHI phenomenon. This research concentrates on the UHI phenomenon as one of the environmental issues facing urbanization and includes a review of green infrastructure (GI) …

Optimizing Fenestration Systems In Residential Buildings: A Parametric Analysis Of Egyptian Energy Codes' Impact On Thermal Comfort, Wafik El-Menshawi Ali F. Bakr , Amira A.Fathi

Journal of Engineering Research

- Fenestration systems, such as windows, doors, and skylights, play a crucial role in improving thermal comfort and reducing energy consumption in buildings. In Egypt, the energy code establishes standards for fenestration systems to promote energy efficiency and carbon emission reduction. Residential buildings account for a significant portion of total energy consumption, making the optimization of fenestration systems essential. This research focuses on studying the optimization of fenestration systems in Egyptian residential buildings through parametric analysis, considering energy standards and their impact on total energy gain and thermal comfort. The paper examines existing energy codes for fenestration systems and explores …

Towards Green Cities As An Approach To Achieve Climate Change Adaptation, Noha H. Hefnawy Nouran M. Ibrahim

Journal of Engineering Research

Climate change is a complicated problem and there is an urgent need for climate change adaptation. Cities are the primary drivers of social, economic, and technical progress. Green Cities are cities that show high environmental performance relative to adapting risks derived from climate change while maximizing the economic and social co-benefits. The Authors adopted a data collection strategy to review the issues, and difficulties caused by climate change and how green cities could assist in addressing them, then adopted a case study analysis to analyze the strategies used by Sharm El Sheikh in the transition to green city. The study …

Using Recycled Materials Towards Sustainable, Eco-Friendly Building In Hot Regions – A Review, Mai W. Madkour Hosny A. Dewer, And Shaimaa M. Refaat

Journal of Engineering Research

Due to population growth and increased urban activity, there is a rise in waste production, which poses health and environmental risks. Additionally, the extraction and transportation of natural resources to places of employment require significant energy consumption, and the world has therefore moved to seek new alternatives away from traditional construction methods by recycling building materials such as concrete, brick, glass, wood, etc., or using new building materials such as rice straw, plastics, corks, etc., taking into account architectural design. The research is aimed at demonstrating that recycled materials have the potential to perform a better environmental performance by preserving …

Sustainable Design In Open Service Campus Areas (The American University In Cairo As A Model), مصطفى منصور عبد المجي أ.م.د. زينب لطفى عبدالحكيم خليفة

Journal of Engineering Research

إن الجامعات المستدامة تعد اتجاهاً مستقبلياً معاصراً لابد أن تحرص مؤسسات التعليم العالي على تبني مبادئه، ووضع خارطة طريق مستقبلية، وتتطلب استدامة الجامعات مواجهة الكثير من التحديات الجغرافية لضمان توفير بيئة آمنه ومريحة مع الحد الأدنى من الهدر، وإيلاء اهتمام خاص لاحتياجات الطلاب وجميع العاملين بالجامعة، والقدرة على تخطيط وإدارة الحيزات الخدمية المفتوحة بها وإقامة المنشآت المستدامة.

Agile Vs Waterfall As An Approach For Effective Management Practices In Fit Out Projects (Preferences Of Project Managers), Moutaz M. El Baz 1

Journal of Engineering Research

Optimum time, cost & quality are the key objectives in managing fit-out projects. Waterfall and Agile are the most common approaches for achieving the project objectives. To determine the optimal managerial approach for fit-out projects, it was essential to study the project life cycle & phases, waterfall & agile methodologies & phases and the project management performance indicators. To achieve the research goals, a data gathering/analysis performed among three steps. Firstly, by performing qualitative research through semi-structured interviews with project management experts to verify the research hypothesis. Secondly, through studying the project & project management life cycle, phases and characteristics …

Improving Home Designs For Disease Prevention In Gated Communities And Satisfying Living Space Needs In Egypt: A Post-Pandemic Living Assessment, A. Moustafa Kamel Neveen Youssef Azmy, Shahira Sharaf Eldin

Journal of Engineering Research

Abstract Pandemics such as SARS and COVID-19 have highlighted the importance of preventing and controlling diseases. Virus transmission in residential buildings, especially multi-unit apartment complexes, has prompted calls for innovative housing designs. While Western countries prioritize physical and mental health in residential building design, China focuses on comfort, aesthetics, appearance, and lifestyle.

Studying The Problems Of Delayed Receipt Of University Buildings In Egypt During The Corona Pandemic, أ.د / مروه قمر الدولة أ.د / لبنى أغا

Journal of Engineering Research

على الرغم من وجود العديد من الدراسات السابقة في مجال تأخير مشاريع البناء. إلا أن هناك أبحاث محدودة جدًا تتناول تأثير كورونا على عوامل تأخر مشاريع البناء. وعليه فإن هذا البحث يتناول آراء المتخصصين حول تأثير جائحة كورونا على العوامل المسببة للتأخير في عملية البناء في مصر. ومن المتوقع أن تساهم نتائج هذا البحث في دراسة العوامل المسببة لهذا التأخير ومحاولة تقديم بعض التوصيات التي تساهم في وضع الخطط المستقبلية لمواجهة الظروف الاستثنائية المماثلة، يهدف هذا البحث إلى قياس أهمية العوامل المسببة للتأخير في عمليات البناء في مصر على مستوى المباني الجامعية بعد جائحة كورونا، وللوصول الى ذلك الهدف اتخذت …

The Design Of The Outer Casing Is Compatible With The Hot Climate Environment, حازم عز الدين قاسم نوبى محمد حسن مصطفى محمد سيد

Journal of Engineering Research

تعتبر المبانى العالية أحد أقل أنماط المبانى توافقاً مع البيئة والمناخ، وذلك بسبب إنعزالها عن النسيج العمرانى المحيط وتعرضها للعديد من العوامل المناخية بشكل أكبر من المبانى المنخفضة، لذا يعتبر الغلاف الخارجى هو العنصر الأهم فى تصميم المبنى العالي لكونه بمثابة الجدار الفاصل بين البيئة الخارجية ذات الظروف المناخية القاسية وبين البيئة الداخلية التى يجب الوصول فيها لراحة المستخدم الحرارية، حيث يعد الغلاف الخارجى هو المسئول عن ما يقرب من 60% من إجمالى الطاقة التى يستهلكها المبنى العالى وذلك فى أعمال التبريد والتهوية الصناعية [1].