Engineering Commons^™

The Effect Of Road Profile On The Performance Of A Full Car Suspension Model Ride Comfort., Bassem Nashaat Zakher Assistant Professor, Ibrahim Mahmoud El Fahham Professor, Mostafa Mohamed Mohamed Associated Professor, Mohamed Abdelfattah Elgohary Associated Professor

Journal of Engineering Research

A full-car eight-degrees of freedom model is used to investigate the dynamic response of vehicles subjected to different road profiles on ride comfort. Two road profiles are used in this study, which include the effect of the vehicle mass and moment of inertia on the vehicle ride comfort. In the proposed vehicle model, the masses of the tires, damping, and stiffness are variables. Also, the suspension parameters and the location of the centre of gravity of the vehicle body can be changed. The Lumped Mechanical System interface of COMSOL Multiphysics is used to model the tires, the suspension system, and …

Enhancing Radiation Performance Of A 0.18 Μm Cmos 60 Ghz On-Chip Double-Slot Vivaldi Antenna, Elsayed Ibrahim Elsaidy Mr., Amr H. Hussein Prof.Dr., Mustafa M. Abd Elnaby Prof. Dr.

Journal of Engineering Research

This paper presents the design of a 60-GHz double-slot Vivaldi antenna (DSVA) using standard 0.18 µm CMOS technology. The antenna's two slots are uniformly excited in both amplitude and phase by a coplanar waveguide (CPW) power divider. A double-Y balun feeding structure is also used to transition from the CPW to the coplanar slot line (CPS). Two techniques are investigated to enhance the antenna's radiation characteristics. The first technique involves incorporating equal corrugations along the edges of the flare aperture, resulting in a significant gain enhancement of 0.9 dBi and an improvement in radiation efficiency by 7%. The second technique …

Developing Paths In Areas Of Distinguished Value Between Preservation And Extinction (A Case Study Of The Railway Axis In The Maadi Area), Kamal Mahmoud Elgabalawy

Journal of Engineering Research

Abstract: proportion of the place, and thus the loss of the distinctive general character of the area, which leads to its extinction. These areas are of distinguished value, with all the thought and culture they carry of society over time. Among the areas classified as having distinguished value is the Maadi suburb, which is located in the south of Cairo Governorate, where boundaries and foundations for preserving them have been set through the Central Administration for Studies, Research, and Policies of the National Coordination Organization. The Ministry of Culture, approved by the Supreme Council for Planning and Urban Development by …

Experimental Investigation Of Light-Weight Concrete-Filled Stainless Steel Tube Composite Long Columns, Nadia Fath Alla, Kamel Kandeel, Mahmoud El-Nagar

Journal of Engineering Research

The main target of this study is to investigate the behavior and performance of long composite circular stainless steel columns filled with light-weight concrete. An experimental study was carried out on four specimens, two of them are long composite circular stainless steel columns with length 1400 mm, diameter 100 mm and thickness of stainless steel tube 2 mm filled with light-weight and normal concrete with strengths 12 and 26 mpa respectively, which denoted by C1400/12 and C1400/26. The other two specimens are short composite circular stainless steel columns with length 500 mm, diameter 100 mm and thickness of stainless steel …

Review Of Wood Drying Technologies, Mohamed Salah Elmetwaly, Lotfy Hassan Rabie Saker, Mohamed Sameh Salem

Journal of Engineering Research

Abstract- This article provides a comprehensive review of drying optimization in data centers by examining the limitations of drying methods and discussing advances proposed by scientists through whom we can provide a comparison between different drying systems with an emphasis on improving energy efficiency and thermal performance. Wood drying under atmospheric pressure has many advantages, including the ability to dry at lower temperatures (by reducing the likelihood of some drying defects), significantly reduced drying times, color preservation, increased energy efficiency, better control of volatile organic compound emissions, and the ability to dry very large cross sections. Previous studies have achieved …

Effect Of Addition Monofilament And Multifilament Polypropylene Fibers On Mechanical Properties Of Concrete At Elevated Temperatures, Nourhan Osama Hanafy Dr

Journal of Engineering Research

Some researchers studied the effect of different types of fibers on the strengths of concrete at elevated temperature. However, there are some limitations in the study of the strengths of concrete using different methods of cooling after elevated temperature. Thus, the main objective of this research is to study the mechanical properties of concrete with the addition of 1% polypropylene fibers, featuring different structures, at elevated temperatures and with various cooling methods, compared to normal concrete. An experimental program using three different series of mixes, the first series included normal concrete (control) mix without fibers, the second series included 1% …

Linear Up-Conversion Mixer Based On Capacitive Cross Coupling And Source Follower Feedback For Mm-Wave Systems Using 130nm Cmos, Mina Kamal Youssef, Marwa Mansour Abdelfattah, Hala Abdelqader Mansour, Sherif Sayed Hekal

Journal of Engineering Research

This paper presents a linear, high-gain, and wideband up-conversion mixer suitable for millimeter-wave (mm-Wave) applications using 130 nm CMOS technology. The mixer is designed specifically for the K band, focusing on 24 GHz applications in 5G systems. The suggested up-conversion mixer comprises three stages: the input transconductance or intermediate frequency (IF) stage, the switching stage, and the output or radio frequency (RF) stage. The IF stage (transconductance stage) employs a complementary current reuse common gate technique through a dual capacitive cross-coupling (CCC) for improving the conversion gain (CG), and a source follower (SF) feedback to enhance the linearity. The IF …

"Towards A Methodology For Studying The Impact Of Integrating Motion Systems In The External Envelope Of A Building On Natural Lighting Inside The Building– (An Applied Study On A Government School In Greater Cairo)", Nashwa Youssif

Journal of Engineering Research

يدرك المصمم ما للعناصر البيئية ولا سيما الإضاءة الطبيعية من دور فاعل في الوصول إلى تصميم ناجح يحقق أفضل أداء إستخدامي، فالإضاءة الطبيعية تذهب إلى صميم عمل المعماري فيستعين بها للإيحاء بشكل الفراغات ولونها وملمس سطوحها.

وهناك العديد من الأساليب الحديثة التي تساعد المعماري علي إتخاذ قراراته التصميمية الخاصة بتصميم المبنى وكيفية الإستفادة من الإضاءة الطبيعية داخل المباني، وهذه الأساليب تهدف إلى زيادة إحترام البيئة وتفترض تحسينات في النظم البيئية من العزل الحراري وإستغلال مصادر الطاقة الطبيعية والإهتمام بنظم الإضاءة الطبيعية والمواد البنائية.

وتعد تقنية دمج الأنظمة الحركية بالغلاف الخارجي للمبنى مع الإستفادة من الإضاءة الطبيعية داخل هذا …

Early Autism Detection Using Machine Learning Techniques: A Review, Shaimaa Fouad Sharabash, Hany Ali Elghaish

Journal of Engineering Research

Abstract- This article provides a comprehensive literature review on technology-based interventions for Autism Spectrum Disorder (ASD). It emphasizes the challenges in early detection and treatment of ASD, highlighting the spectrum nature of the disorder. The review discusses traditional diagnostic strategies such as behavioural observations, developmental screening and medical testing and goes on to explore advanced machine learning and deep learning models, including SVM, k-nearest neighbours, decision tree and LSTM, for predicting ASD characteristics in toddlers and children. Additionally, recent techniques employing more than ten strategies for ASD detection are summarized and various datasets used in early detection are described. The …

A Mm-Wave Radio Frequency Power Amplifier Based On Transformers Coupling And 2nd Harmonic Termination Network Using 130 Nm Cmos Technology For 5g Applications, Mina Kamal Youssef, Marwa Mansour Abdelfattah, Hala Abdelqader Mansour, Abdelhaleem Abdelnaby Zekry, Sherif Sayed Hekal

Journal of Engineering Research

An efficient and linear power amplifier (PA) for millimeter wave applications using a 130nm CMOS process is presented in this paper. The proposed PA uses transformer coupling for output, inter-stage, and input matching and also utilizes inter-stage inductors to boost RF achievement. The Ansoft high-frequency structure simulator (HFSS) is used to analyze and design the coupling transformers and inter-stage matching inductors to achieve a high coupling coefficient and quality factor over the frequency range of 19 to 29 GHz. The 2^nd harmonic termination networks are connected at each stage of the proposed power amplifier to enhance the gain and …

Lessons Learned From Global Experiences Of Urban Competitiveness To Improve The Humanization Of Egyptian Cities, Asmaa Mostafa Elshamy

Journal of Engineering Research

This study explores the intricate relationship between urban competitiveness and urban humanization in the context of global capital cities and Cairo. By examining key indicators and conducting comprehensive statistical analyses, the study highlights the significance of prioritizing sustainable and inclusive urban development strategies that foster economic growth, social cohesion, environmental sustainability, and cultural preservation. The findings emphasize the critical role of governments and policymakers in shaping vibrant, inclusive, and sustainable urban environments that prioritize the well-being and aspirations of residents. Drawing upon global best practices and lessons learned, the study offers valuable recommendations to enhance the urban competitiveness and humanization …

Global Events As An Approach For Urban Communities’ Development, Asmaa Mostafa Elshamy

Journal of Engineering Research

The study examined the role of global events in developing urban communities and the challenges facing the global events industry, as Dubai achieved revenue growth of 3.3% in 2024, and allocated a budget of 4% for infrastructure worth 2.6 billion dirhams, and the inflation rate in Dubai reached 2.5% in 2017. 2021, which confirms the efficiency of development in the city based on holding international events. The infrastructure in Qatar also increased by 7%, and the percentage of national income from tourism in Sharm El Sheikh reached 11.8%

The study clarifies the role of global activities as an input to …

Basic Psychological Needs Satisfaction And Well-Being Among Seafarers: An Investigation Of Interaction Effects Through The Lens Of Self-Determination Theory, Nong Vuong Phi, Kung Don Ye, Feng Ming Tsai, Hsiao Chao Hsieh, Shiou-Yu Chen

Journal of Marine Science and Technology–Taiwan

Enhancing employee well-being is a primary goal for enterprise sustainable development. Although seafarers represent a major human resource in the maritime industry, the distinctive demands of their profession often compel them to compromise on certain elements in fulfilling their basic psychological needs, thereby contributing to mental health challenges. Recently, COVID-19 and its associated border control measures have prolonged the voyages of seafarers, drawing public attention to the topic of seafarer well-being. In this study, self-determination theory was used to explore the effects of autonomy, competence, and relatedness as fundamental psychological needs on seafarer well-being. After the independent effects of these …

Propagation Of Stress Shock Waves In Elastoplastic Continuous Media With Spherical Symmetry, Abdimital Nabiyevich Nabiyev, Abdumalik Abdumurodovich Nabiyev

Technical science and innovation

The article examines the motion caused by the explosion of a spherical charge in elastoplastic continuous media. When a charge explodes, it is assumed that the charge instantly turns into a high-pressure gas without changing its volume, and this gas spreads into the environment, forming a shock wave with spherical symmetry. Taking into account the presence of tangential stresses in inclined areas, equations of one-dimensional dynamic motion of soil are derived, according to which the patterns of propagation of shock waves in soil massifs during an explosion with spherical symmetry are studied. To find the limiting state of the soil, …

Ir Spectral Analysis Of Broussonetia Papyrefera Plant, Umid Hamroyevich Alamov, Zaytuna Ali Qizi Qurbonaliyeva, Dostonbek Qurbonsho Ugli Shomurodov, Elmurod Abduqodirovich Egamberdiev

Technical science and innovation

in this study, a method for determining the concentration of lignin, cellulose and hemicellulose in plant materials using Fourier-transform IR spectroscopy of Broussonetia papyrefera was developed and tested. The procedure is based on the use of calibration functions that reflect the dependence of the intensity of analytical absorption lines on the concentration of lignin (1512 cm-1) and cellulose (1450 cm-1) in standard samples; indirect correlation was used for hemicellulose. The model samples were ternary mixtures composed of lignin, bacterial cellulose and hemicellulose in different proportions. The proposed method was tested on a wide range of plant biomass samples.

Establishing Optimal Parameters Of The Technological Mode Operation Of A Water-Penetrating Gas Well, Vladimir Mixaylovich Shevtsov, Lobar Zoirovna Igamberdieva, Azamjon Alimdjanovich Zakirov

Technical science and innovation

The article discusses research on finding the optimal parameters of the technological operating mode of wells that minimize the water cut of well production, based on a detailed analysis of the geological and field characteristics of the deposit and materials from gas-hydrodynamic studies. Using the example of well 77 of the Sharkiy Berdak gas condensate field, the optimal parameters of the technological mode of its operation with minimal removal of formation water in its production were determined according to the data of gas-hydrodynamic studies. Analyzing the obtained results of processing data from gas-hydrodynamic studies, recommendations were made to install a …

Study Of The Physical-Chemical Properties Of Chitosan Synthesized By The Cryogenic Method From Apis Mellifera Bees, Dilnoza Sohibovna Isomitdinova, Gulnora Akmalovna Ikhtiyarova, Jahongir Mustaqim O’G’Li Sharopov

Technical science and innovation

Chitosan was synthesized from Apis Mellifera dead bees by traditional and cryogenic methods, and the degree of deacetylation, viscosity, and molecular mass of the synthesized sample was studied. Chitosan was synthesized by deacetylation of chitin under cryogenic conditions. NaOH concentration 40%, temperature 90 ± 3 °C, time 120 min. The degree of deacetylation, and molecular mass was determined using an Ubbelode viscometer. DDA was determined by conductometric titration under standard conditions. The degree of deacetylation of Apis Mellifera chitosan was 87%. synthesized by cryogenic method DDA of chitosan was 83% synthesized by traditional method. Conducting the synthesis in liquid nitrogen …

Study Of Technological Parameters On Catalytic Hydroisomerisation Of Aromatic Hydrocarbons Into Alkyl Naphthenic Hydrocarbons, Habibullaeva Mirzaxmatovna Ra'no, Nodira Turobjonovna Torayeva, Temurbek Z. Daminov, Murod Azimovich Eshmukhamedov

Technical science and innovation

The article presents experimental results of the catalytic hydroisomerization of aromatic hydrocarbons into alkyl naphthenic hydrocarbons. Aluminum col-molybdenum with silicon oxides has been studied as a catalytic system, which imparts acidic properties to the catalytic system and stimulates isomerization.

The dehydrogenation reaction of cyclohexane has been studied, which occurs on the active surface of one of the metal oxides to cyclohexene, then the resulting cycloolefin diffuses to the acidic active center - aluminosilicate, where skeletal isomerization occurs and then the isomerized cycloolefin again returns to the active center of the surface of the catalytic system, where it is hydrogenated to …

Development Of A Universal Humidity Converter At Ultra High Frequency, Hulkar Asadullayevna Usmonova, Asadulla Turgunbayev

Technical science and innovation

The article proposes the and principle of operation of a universal primary measuring transducer of humidity at an ultra-high frequency with reciprocating motion along the vertical axis of rotation, which allows increasing the information redundancy of the primary measuring transducer (the influence of inhomogeneities, including humidity in the composition of the material, on the measurement result is averaged). The design of the primary measuring transducer under consideration provides for correction of the moisture measurement result by the mass (density) of the material, which will make it possible to carry out measurements without preliminary weighing the sample. The obtained results of …

Algorithms And Solution To The Problem Of Parametric Identification Of The Gas Composition Of The Atmosphere, Baxodir Asatullayevich Xolxodjayev, Erkin Abduraxmanovich Esanov, Bekjon Abdullayevich Kuralov

Technical science and innovation

This article discusses the problem of identifying the gas composition of the atmosphere, which has important practical significance and allows us to illustrate the advantages of the proposed regularizing solution algorithms. Every еar, human industrial activity increasingly aggravates the problem of environmental protection. Among the diverse human impacts on nature, air pollution occupies a special place. Every еar, up to 500 thousand various pollutants are emitted into the atmosphere. In this regard, the task of monitoring the composition of the atmosphere is very relevant. Numerical studies of the problem of identifying the gas composition of the atmosphere have shown higher …

Analysis Of The Drives Of Pumping Stations In The Southern Part Of The Angren Coal Mine Of Uzbekugol Jsc, Shukhrat Badretdinovich Umarov, Murakam Mirzakhmatovich Mirsaidov, Islombek A’Lobekovich Abdullabekov, Saidamirkhon Hayrullakhon O‘G‘Li Oripov

Technical science and innovation

This article presents the results of a comprehensive analysis of the operation of pumping station drives in the southern part of the Angren coal mine of Uzbekugol JSC. The modes of operation and designs of pumps of various types are considered, including СPSH 850-240, D320-50, D1200-125 and GR170-30. The study covers the performance characteristics of these pumps, as well as their adaptation to the specific conditions of the coal mine. Special attention is paid to the impact of climate change on the operating modes of pumping units. Changes in the amount and intensity of precipitation, as well as fluctuations in …

Study Of The Synthesis Mechanism And Some Properties Of Oligomers Based On Epichlorohydrin And Diphenylguanidine, Rovshan Israilovich Ismailov, Normuhamad Edgarov, Alisher Israilovich Ismailov

Technical science and innovation

In this work, the synthesis and the scheme for obtaining an oligomer based on epiiodhydrin with diphenylguanidine were studied, the proportions of epiiodhydrin in the initial mixture, the yield of oligomers, and the reduced viscosity were studied. The results of spectroscopic and elemental analyzes are obtained, which show that changes in the ratio of monomers have almost no effect on the iodine content in the oligomer. This is apparently due to the fact that epiiodhydrin is much more active in reactions than amino compounds. By studying the degree of conversion on the viscosity of the oligomerization products, the effects on …

Justification Of The Effectiveness Of Software For The Design Of Open-Pit Mining, Tolib Olimovich Komilov, Bobirjon Nabijonovich Ashurov, Ulugbek Bakhtiyorovich Sattarov, Ma’Ruf Ixtiyorovich Karimov

Technical science and innovation

The article notes that the economic feasibility of implementing a project based on deposits directly affects the economy of the country and the region, as well as the construction of new facilities, the use of the most balanced approaches and design solutions in a complex will allow achieving the set goal of increasing production volumes and bringing the enterprise to a new level of development. In order to achieve the above goals, it has been proven with the implementation of investment projects using software for the design of open-pit mining, it is possible to further develop the region, agriculture with …

Algorithm Of Adaptive Cyclic Control Of Position-Trajectory Moving Objects (In The Case Of An Industrial Robot Manipulator), Zaripov Oripjon Olimovich, Sevinova Dildora Usmonovna

Technical science and innovation

This article is devoted to the adaptive cyclic control of an industrial robot manipulator on the example of moving objects with a positional trajectory. The specific features of applying the principle of adaptive cyclic control to industrial robots are also presented. The kinematic scheme describing the movement of the robot working body with the adaptive cycle control system and the transition states of the working body based on limited positions in space are presented, the sequence of movement of the manipulator links and the selection of information about the actions at individual levels of mobility, control in the case of …

Possibility Of Applying Methods Of Analysis And Synthesis Of Linear Electrical Circuits To Some Nonlinear Circuits, Qudrat Gayratovich Abidov, Anvar Ismatullaevich Rahmatullaev, Mexrnoz Odiljonovna Gafurova

Technical science and innovation

This article discusses the possibility of applying the analysis and calculation methods used in linear electric circuits to certain nonlinear circuits. It is shown that if we abandon the quantitative criteria for the analysis and synthesis of nonlinear circuits using linear principles, some problems in nonlinear electrical engineering can be correctly solved based on linear theory. As an example, the simplest ferroresonant voltage stabilizer is considered, using the method of superposition and the equivalence of ferroresonant circuits in series and parallel connections. The electrical diagram is shown, and a formula for the stabilization coefficient is derived, representing a complex nonlinear …

Methodology For Calculating The Technical And Economic Indicators Of A Photovoltaic Thermal Installation Based On A Thin-Film Cadmium Telluride Module, Islom Rakhmatovich Jurayev, Isroil Abriyevich Yuldoshev, Zukhra Islamovna Jurayeva

Technical science and innovation

This article presents a methodology for calculating the technical, economic and environmental indicators of the developed design of a photovoltaic thermal installation with a nominal electric power of 1,2 kW and a thermal power of 2.17 kW for simultaneous production of electric energy and hot water for household needs of consumers. The capacity of the installation is 5.26 kWh of electricity and 30 liters/hour of heated water. The schemes of obtaining hot water by additional heating of the heated water produced by the installation in the cool seasons of the year are presented. This installation allows to receive total energy …

An Experiment Study On Implementing Syngas On A Small Generator Set, Bui Van Chinh, Khong Vu Quang, Khanh Nguyen Duc

ASEAN Journal on Science and Technology for Development

This paper presents an experiment on syngas's influence on the performance and pollutant characteristics of a mechanical diesel engine generator set. Using syngas as an external fuel is good for medium and light loads of less than 80%. While a moderate substitution of syngas will contribute to good performance at high loads, a larger level of syngas provided may degrade engine performance. The brake-specific energy consumption rises as the replacement syngas flow increases. Using syngas as an external fuel to substitute for a part of the diesel might cause the engine to perform unstablely. The more syngas replacements, the greater …

The Chatgpt Dilemma: Opportunities Vs. Risks In Engineering Education, Ramiz Assaf, Amjad El-Qanni, Ihab H. Alsurakji, Mahmoud Assad

An-Najah University Journal for Research - B (Humanities)

Objective: This research aims at exploring ChatGPT's features and benefits in engineering education, while presenting suggested best practices, potential challenges, and ethical considerations for its use in this field. Methodology: Descriptive analysis of ChatGPT applications in engineering education, focusing on benefits, challenges, and limitations. Key Findings: ChatGPT has diverse applications across various domains, with unprecedented attention in media, industry, and academia. ChatGPT can help enhance students' problem-solving and soft skills (21st century skills). There is a need to change the teaching and assignment approach in engineering to better harness ChatGPT's capabilities. Conclusions: Educators in the engineering field should emphasize the …

A Study On The Polarity Of Generalized Neutrosophic Ideals In Bck-Algebra, Bavanari Satyanarayana, Shake Baji

Neutrosophic Systems with Applications

In this study, we apply k-polar generalized neutrosophic logic to the ideal of BCK-algebra and consequently introduce the notion of a k-polar generalized neutrosophic ideal in BCK-algebra with an example. We provide conditions for a k-polar generalized neutrosophic set to be a k-polar generalized neutrosophic ideal. We prove that every k-polar generalized neutrosophic ideal is a k-polar generalized neutrosophic subalgebra, but the converse is not true, which can be illustrated with an example. Furthermore, we prove that a k-polar generalized neutrosophic set is a k-polar generalized neutrosophic ideal if and only if its corresponding cut sets are ideals of the …

Unveiling Similarities In The Code Of Life: A Detailed Exploration Of Dna Sequence Matching Algorithm, Mahmoud Y. Shams, Romany M. Farag, Dalia A. Aldawody, Huda E. Khalid, Ahmed K. Essa, Hazem M. El-Bakry, A. A. Salama

Neutrosophic Systems with Applications

Identifying similar DNA sequences is crucial in various biological research endeavors. This paper delves into the intricate workings of a specific algorithm designed for this purpose. We provide a systematic explanation, exploring how the algorithm handles user input, reads stored DNA sequences, utilizes the Word2Vec model for vector representation, and calculates sequence similarity using diverse metrics like Cosine Similarity and Neutrosophic Distance. Additionally, the paper explores the incorporation of neutrosophic values to account for uncertainty in the comparisons. Finally, we discuss the extraction of results, including matched sequences, similarity scores, and accuracy measures. This in-depth exploration provides a clear understanding …