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Articles 2761 - 2790 of 27371
Full-Text Articles in Engineering
Mutual Coupling Impedance Effect On Ris-Assisted Terahertz Communication, Radwa A. Roshdy Dr., Hossam M. Kasem Prof., Mohammed A. Salem Dr.
Mutual Coupling Impedance Effect On Ris-Assisted Terahertz Communication, Radwa A. Roshdy Dr., Hossam M. Kasem Prof., Mohammed A. Salem Dr.
Journal of Engineering Research
Terahertz (THz) communication based on reconfigurable intelligent surfaces (RIS) is a promising technology in future wireless networks, with the capabilities of ultra-high data rates and energy-efficient beam communicating. Nevertheless, the mutual coupling impedance of the closely spaced RIS reveals the inefficacy in existing channel estimation schemes, while it is usually ignored in the literature. In this paper, we fill this gap by developing an EM-compliant channel model that integrates mutual coupling explicitly for RIS-assisted THz systems. We evaluate the performance of mutual impedance-induced influence to the accuracy of the root mean square error (RMSE), which is considered as a pivotal …
Shear Strength Enhancement Of Soft Clay Using Lime Columns: A Large-Scale Experimental Study, Mostafa Elsawwaf Prof, Waseim Azzam Prof, Ahmed Sami Fouad
Shear Strength Enhancement Of Soft Clay Using Lime Columns: A Large-Scale Experimental Study, Mostafa Elsawwaf Prof, Waseim Azzam Prof, Ahmed Sami Fouad
Journal of Engineering Research
Soft clay soil is often classified as problematic due to its low shear strength and high compressibility, which can cause significant structural damage. To mitigate these issues, various soil stabilization techniques have been developed, including the use of lime columns, fly ash, and crushed bricks. In this study, a large-scale direct shear device was designed and constructed to evaluate the impact of lime column stabilization on the shear strength of soft clay. The shear box measured 20 cm in height, 30 cm in length, and 30 cm in width. A hydraulic piston applied shear force by moving the lower shear …
A Hybrid Binary Grey Wolf Optimizer Based On De Algorithm For Feature Selection, Amany Saad Abdelrazek, Basma Ghareeb Elkilany, M. Arafa
A Hybrid Binary Grey Wolf Optimizer Based On De Algorithm For Feature Selection, Amany Saad Abdelrazek, Basma Ghareeb Elkilany, M. Arafa
Journal of Engineering Research
Feature selection is one kind of optimization problem that has bio-objective functions, where it is necessary to get the minimum number of features that achieve high classification accuracy. According to literature studies, several kinds of meta-heuristic algorithms have been utilized to solve feature selection problems. One of these meta-heuristic algorithms is the Grey Wolf Optimization (GWO) algorithm and its modified variants, including the binary versions. They have yielded competitive results compared to other algorithms. Despite the simplicity and effectiveness of GWO and its modified versions, they face challenges related to the exploitation ability of the local search. To avoid premature …
A Comprehensive Review Of Natural Gas-Diesel Dual-Fuel Engines: Efficiency, Emissions, And Engine Performance, Medhat Elkelawy Prof. Dr, Eng., E. A. El Shenawy Prof. Dr., Hagar Alm-Eldin Bastawissi Prof. Dr. Eng., Mohamed Mostafa Shafey Eng
A Comprehensive Review Of Natural Gas-Diesel Dual-Fuel Engines: Efficiency, Emissions, And Engine Performance, Medhat Elkelawy Prof. Dr, Eng., E. A. El Shenawy Prof. Dr., Hagar Alm-Eldin Bastawissi Prof. Dr. Eng., Mohamed Mostafa Shafey Eng
Journal of Engineering Research
Natural gas (NG) diesel dual-fuel systems have emerged as a promising advancement in internal combustion engine (ICE) technology, offering significant potential for reducing emissions, while maintaining high fuel efficiency and performance standards. This review critically examines the combustion characteristics, operational performance, emissions mitigation potential, and the engineering challenges associated with engine modifications and fuel system compatibility. Furthermore, the role of dual-fuel technology within broader global climate change mitigation strategies is explored. Extensive evidence from the literature confirms that NG-diesel dual-fuel engines can achieve substantial reductions in nitrogen oxides (NOₓ) emissions up to 53% particulate matter (PM) by over 60%, and …
Performance Enhancement Of Ev Drive System Under Open-Phase Fault Using Reinforcement Learning With Mpc, Ahmed M. Hassan, Mohammed E. Metwally Dr.
Performance Enhancement Of Ev Drive System Under Open-Phase Fault Using Reinforcement Learning With Mpc, Ahmed M. Hassan, Mohammed E. Metwally Dr.
Journal of Engineering Research
Improving the operation of electric vehicles (EVs) under fault is a very important subject because it increases their ability to operate in case of an emergency. This paper proposes a fault-tolerant control methodology for an EV drive system under open phase fault (OPF). The 5-ph interior permanent magnet synchronous motor (IPMSM) is employed in the drive system because it has several merits, such as high efficiency and reliability. The proposed technique is based on utilizing a reinforcement learning (RL) control algorithm, based twin-delayed deep deterministic policy gradient (TD3) algorithm, to operate the motor at maximum torque per ampere under OPF. …
Evaluation Of Irrigation Improvement Projects In Old And New Lands, Noha Salah Ibrahim, Amir Mohamed Mobasher, Ibrahim Abd El Naby Gaafar, Mohamed Ahmed Reda
Evaluation Of Irrigation Improvement Projects In Old And New Lands, Noha Salah Ibrahim, Amir Mohamed Mobasher, Ibrahim Abd El Naby Gaafar, Mohamed Ahmed Reda
Journal of Engineering Research
Egypt suffers from severe water scarcity, and the Nile Delta region, where inefficient irrigation practices exacerbate water stress and faces significant challenges. This study employs a multi-phased approach to evaluate irrigation improvement projects and management strategies in two study areas represent old and new land .Key performance indicators including adequacy, efficiency, equity, dependability, and Water Use Index, were calculated based on extensive data collection, considering factors like soil properties, climate conditions, and crop water requirements. The Analytic Hierarchy Process employed in two phases: first, to prioritize the key performance indicators themselves, and second, to rank four different irrigation management strategies …
Experimental Investigation On The Effect Of Using Gasoline With Commercial Additives On Spark Ignition Engines Performance And Emissions Characteristic, Medhat Elkelawy Prof. Dr, Eng., E. A. El Shenawy Prof. Dr., Hagar Alm-Eldin Bastawissi, Emad Mostafa Eng.
Experimental Investigation On The Effect Of Using Gasoline With Commercial Additives On Spark Ignition Engines Performance And Emissions Characteristic, Medhat Elkelawy Prof. Dr, Eng., E. A. El Shenawy Prof. Dr., Hagar Alm-Eldin Bastawissi, Emad Mostafa Eng.
Journal of Engineering Research
Gasoline is the primary source of energy in combustion engines, despite some drawbacks, such as knocking inside the engine, incomplete combustion, and the production of high emissions. The main trend has been toward the use of chemical additives as improvers, including oxidizing additives and aromatic hydrocarbon compounds. Both additives have an effect on the combustion process. Oxidizing additives improve the combustion process inside the chamber by adding additional oxygen to the fuel, which helps accelerate flame propagation, such as ethanol and oleo-octane plus. On the other hand, aromatic additives are used to increase the octane number, which in turn enhances …
Investigation Of Activated Carbon From Rice Waste Using Superheated Steam, Wael Abdelmoez, Jehan Tolba, Hiroyuki Yoshida, Sherif Ahmed Kamal
Investigation Of Activated Carbon From Rice Waste Using Superheated Steam, Wael Abdelmoez, Jehan Tolba, Hiroyuki Yoshida, Sherif Ahmed Kamal
Journal of Engineering Research
Activated carbon is essential in many industries and applications, especially in removing odor and color in sewage treatment plants. The most common activated carbon used is generated from coconut shells, which are difficult to obtain in many countries, especially in the Middle East, as coconut trees do not grow in the environment there; therefore, it was essential to find local alternatives from the national agricultural waste. This study presents the investigation of activated carbon from rice husks using superheated steam in a rotary kiln. The effect of thermal activation on the porosity of the activated rice husks at different temperatures …
An Eulerian-Pfem Approach To Model Transient Capillary Forces On Moving Contact Lines Of Spreading Liquid Drops: Applications In Hydraulic And Fluid Dynamics, Elaf N. Mahrous, Syed Yousufuddin, Muhammad Saleem Professor, Mohammed N. Iqbal, Muhammad T. Bin-Saleem
An Eulerian-Pfem Approach To Model Transient Capillary Forces On Moving Contact Lines Of Spreading Liquid Drops: Applications In Hydraulic And Fluid Dynamics, Elaf N. Mahrous, Syed Yousufuddin, Muhammad Saleem Professor, Mohammed N. Iqbal, Muhammad T. Bin-Saleem
Journal of Engineering Research
This study addresses the complexities of simulating multiphase flows, particularly the dynamics of droplet behaviour on solid substrates, which are influenced by intricate capillary interactions. Despite advancements in fixed-grid and moving-grid methodologies, there remains a critical gap in accurately modelling transient phenomena and dissipative forces at the solid-liquid interface. We introduce a novel Eulerian-particle finite element method (PFEM) framework that captures the transient capillary forces associated with the movement of contact lines in liquid droplet spreading scenarios. Through a numerical assessment of three established dissipative force models—Jiang’s, Bracke’s, and Seeberg’s we identify Jiang's model as the most effective and stable …
Evaluation Of Machine And Deep Learning Models For Predicting Water Distillate Rate, Ghada Hamisa
Evaluation Of Machine And Deep Learning Models For Predicting Water Distillate Rate, Ghada Hamisa
Journal of Engineering Research
Freshwater scarcity has become a critical global challenge due to rapid population growth and environmental pollution caused by industrial and urban expansion. Solar stills offer a sustainable solution by desalinating impure water using solar energy, making them valuable for domestic, industrial, and academic applications. However, traditional methods for optimizing solar still performance face significant limitations, including time-consuming experimental data collection, computational inaccuracies, and high development costs. To address these challenges, this study leverages machine learning (ML) and deep learning (DL) techniques to predict the distilled water production rate of solar stills before physical construction or modification. A heat pump solar …
Structural Performance Of Corrugated Steel Plate Shear Walls, Eyad Ayman Bakry, M. F. Hassanein, Ayman Seleemah
Structural Performance Of Corrugated Steel Plate Shear Walls, Eyad Ayman Bakry, M. F. Hassanein, Ayman Seleemah
Journal of Engineering Research
Abstract- Corrugated Steel Plate Shear Walls (CoSW) represent a groundbreaking advancement in structural engineering, providing exceptional seismic resilience, energy dissipation, and lateral stiffness compared to traditional flat steel plate shear walls. This paper offers a comprehensive review of CoSW performance under various conditions, including cyclic and seismic loads, with a focus on enhancing geometric configurations and reinforcement techniques. Key innovations such as enhanced corrugation angles, stiffener integration, and strategically designed openings are discussed. Recent progress in computational modeling and experimental validation has further refined design methodologies, ensuring their practical applicability. The review highlights that critical parameters such as corrugation depth, …
Numerical Investigation Of Thermal Effects On Concrete Bridges: Insights From Frame And Shell Modeling, Mohamed Ibrahim Metwally Dr., Mohamed A. El Zareef Prof.
Numerical Investigation Of Thermal Effects On Concrete Bridges: Insights From Frame And Shell Modeling, Mohamed Ibrahim Metwally Dr., Mohamed A. El Zareef Prof.
Journal of Engineering Research
Bridges are essential structural components of transportation networks, and their performance is significantly influenced by temperature variations. Thermal expansion and contraction can induce stresses that affect structural stability, necessitating accurate modeling techniques for design and maintenance. This study investigates the thermal behavior of a three-span continuous box girder bridge using two different numerical modeling approaches: the Frame Element model and the Shell Element model. The research evaluates the effects of uniform temperature conditions (20°C) and a temperature gradient of ±5°C, focusing on bending moments, normal forces, and fiber stresses. Results indicate that the Shell Element model predicts bending moments and …
Finite Element Modeling Of Newly Developed Cold-Formed Hollow Flanged Z-Beams, Mohammed Ahmed Diab, Mohamed Saeed Refaey, Hanan Eltobgy
Finite Element Modeling Of Newly Developed Cold-Formed Hollow Flanged Z-Beams, Mohammed Ahmed Diab, Mohamed Saeed Refaey, Hanan Eltobgy
Journal of Engineering Research
Cold-formed hollow flanged sections (CFHFS) are considered an innovative advancement in cold-formed steel design. These sections offer large lateral torsional rigidity over the open cold-formed section resulting in enhanced flexural capacity. This paper introduces a numerical study on the section moment capacity of newly developed cold-formed hollow flanged Z-beams (CFHFZBs). CFHFZBs can be easily constructed in the Egyptian market by welding an industrially available main Z-element to two secondary Z-elements to form the hollow flange. This paper presents the finite element modeling of sixteen CFHFZBs in a four-point bending arrangement using ABAQUS software. To obtain verified finite element models (FEMs), …
Reduction Of Volatile Acidity Of Grape Wines By Immobilized Lipase, Azamhon Kh. Khasanov, Barno A. Abdullaeva, Xasan T. Khasanov
Reduction Of Volatile Acidity Of Grape Wines By Immobilized Lipase, Azamhon Kh. Khasanov, Barno A. Abdullaeva, Xasan T. Khasanov
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of this work is to study the enzymatic transformation of acetic acid into ethyl acetate by immobilized lipases of the fungus Rhizopus microsporus UzLT-1 obtained on the basis of silica gel and phosphatidylethanolamine to reduce the content of volatile acids in grape wines. In the work, a preparation of lipase from the fungus Rhizopus microspores was used. Lipolytic activity was measured by photocolorimetric method using rhodamine 6G as a chromophore agent. The catalytic property of lipolytic enzymes from the fungus Rh.microsporus immobilized on the surface of silica gel coated with polyamides and modified cephalin in aqueous-alcoholic media was …
Synthesis And Radical Polymerization Of N,N-Diallyl Phthalimide, Oytura S. Maksumova, Feruza A. Pulatova, Dilnozakhon I. Tursunova, Feruza A. Makhmudova
Synthesis And Radical Polymerization Of N,N-Diallyl Phthalimide, Oytura S. Maksumova, Feruza A. Pulatova, Dilnozakhon I. Tursunova, Feruza A. Makhmudova
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of this work is the synthesis of iodine N,N-diallylphthalimide and the study of its radical polymerization. In this regard, the synthesis of iodine N,N-diallylphthalimide was carried out in two stages: at the first stage, phthalic anhydride reacts with allylamine and forms allyl phthalimide, at the second stage, allyl phthalimide reacts with allyl iodide to form iodine N, N-diallyl phthalimide. Radical polymerization of the synthesized quaternary salt of N, N-diallyl phthalimide was studied in the presence of the initiator dinitrile azobisisobutyric acid at relatively low temperatures. Kinetic features of the polymerization reaction of iodine N, N-diallyl phthalimide were considered. …
Technology For Improving The Quality Of Graphite Enrichment By Chemical Treatment, Baxtiyor S. Sadullayev, Abror S. S. Usmonov
Technology For Improving The Quality Of Graphite Enrichment By Chemical Treatment, Baxtiyor S. Sadullayev, Abror S. S. Usmonov
CHEMISTRY AND CHEMICAL ENGINEERING
No abstract provided.
On The Possibility Of Using Qiziltepa Bentonite In Drilling, Farrukh B. Erkinov, Biloliddin B. Qobilov, Mukhammadamin Sh. Jololdinov
On The Possibility Of Using Qiziltepa Bentonite In Drilling, Farrukh B. Erkinov, Biloliddin B. Qobilov, Mukhammadamin Sh. Jololdinov
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the study was to investigate the possibility of using natural bentonite samples obtained from the Qiziltepa district of Navoiy region in drilling operations. Within the scope of the study, the chemical and mineralogical compositions of the bentonite were determined using X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis methods. In addition, several enrichment methods for bentonite were tested under laboratory conditions. These included magnetic separation of the bentonite suspension formed with water, washing, and acid washing using oxalic acid for chemical enrichment. The chemical and mineralogical composition of the resulting samples was reanalyzed, relevant tables were compiled, …
Peculiarities Of Preparation Of Nanostructured Cerium-Doped Lutetium-Aluminium Garnet Powders Prepared By Sol-Gel Combustion Method, Eygeniy N. Poddenezhny, Ekaterina E. Trusova, Andrei A. Boiko, Vladimir S. Urbanovich
Peculiarities Of Preparation Of Nanostructured Cerium-Doped Lutetium-Aluminium Garnet Powders Prepared By Sol-Gel Combustion Method, Eygeniy N. Poddenezhny, Ekaterina E. Trusova, Andrei A. Boiko, Vladimir S. Urbanovich
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the work is to study a new method of thermochemical synthesis of luminescent powder of lutetium-aluminium garnet activated by cerium ions (Lu3Al5O12:Се3+) using nitric acid salts of lutetium, aluminium and cerium, and a mixture of acetic acid and polyvinyl alcohol as a propellant. The synthesis process was carried out in a muffle furnace at an initial temperature of 350 ºC under conditions of limited presence of atmospheric air. The average size of the coherent scattering region for Lu3Al5O12:Се3+ obtained from the combustion …
Evaluation Of Coal Properties Used In A Cement Plant, Geun-Seong Lee, Farrukh B. Erkinov, Mastura Kh. Aripova
Evaluation Of Coal Properties Used In A Cement Plant, Geun-Seong Lee, Farrukh B. Erkinov, Mastura Kh. Aripova
CHEMISTRY AND CHEMICAL ENGINEERING
Coal is not only a heat source for clinker burning but also the coal ash after combustion plays a large role in the quality of clinker mixed with hot meals in the kiln. Since the properties of coal vary depending on the coalification and environment in which it was sedimented, the quality of coal supplying to cement plant can change greatly depending on the coal seam even if it is from the same coal mine. Therefore, the coal used in a cement plant should have its properties measured accurately through representative sampling whenever it is supplied to the plant, and …
Preparation Of Nano-Sized Silver Particles By Electrolysis From Silver-Containing Electrical Scrap, Umar A. Yakhyaev, Mastura Kh. Aripova, Ripsime V. Mkrtchyan, Dilrabo A. Mukhtorova
Preparation Of Nano-Sized Silver Particles By Electrolysis From Silver-Containing Electrical Scrap, Umar A. Yakhyaev, Mastura Kh. Aripova, Ripsime V. Mkrtchyan, Dilrabo A. Mukhtorova
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the study was preparation of nanosized silver particles by electrolysis from silver-containing scrap from electrical engineering production. For this purpose, at the first stage, silver particles with a size of 0.2–2 microns were obtained by the cementation method, confirmed by the results of scanning electron microscopy. A silver anode for the electrolysis unit was created from the obtained silver particles by the melting method. At the second stage, electrolysis was carried out on a unit with rotating electrodes, in which the cathode was made of platinum. Optimum conditions for the electrolysis process, carried out at a voltage …
Synthesis Of Neodymium Oxide Nanotubes Via Chemical Deposition Followed By Thermal Treatment, Odiljon E. Abdurakhmonov, Mastura Kh. Aripova, Sherzod E. Abdurakhmonov, Zaynobiddin T. Matkarimov, Sultan Kh. Suleymanov, Natalya A. Kulagina
Synthesis Of Neodymium Oxide Nanotubes Via Chemical Deposition Followed By Thermal Treatment, Odiljon E. Abdurakhmonov, Mastura Kh. Aripova, Sherzod E. Abdurakhmonov, Zaynobiddin T. Matkarimov, Sultan Kh. Suleymanov, Natalya A. Kulagina
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of this work is to synthesize Nd2O3 nanotubes via chemical deposition followed by thermal treatment. Nd(OH)3 nanotubes were synthesized using Nd(NO3)3 as a precursor and NaOH as a precipitant. After thermal treatment, crystalline Nd2O3 nanotubes were obtained. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were conducted to study the thermal effects and phase transitions during the synthesis. X-ray phase analysis (XRD) was used to determine the phase composition and crystal structure. In addition, the construction of the crystal lattice structure is carried out using programs.The morphological characteristics …
Circular Thinking In A Technological Age: Designing For A Regenerative Future, Mohammed Ali Berawi, Perdana Miraj, Mustika Sari
Circular Thinking In A Technological Age: Designing For A Regenerative Future, Mohammed Ali Berawi, Perdana Miraj, Mustika Sari
CSID Journal of Infrastructure Development
Architecture, engineering, and construction sector is experiencing challenges related to environment and economic aspects. It consumes vast amounts of resources and energy and contributes heavily to global carbon emissions. Academics and industry leaders are trying to explore various strategies to combat climate change by shifting toward circularity. It is a systems-based approach that prioritizes regenerative design, responsible consumption, and closed-loop resource use. At the heart of this shift lies the interplay between circularity, technology, and the environment that can reshape how we live, produce, and consume. But this transformation is not simply about adopting greener practices; it’s about rethinking the …
The City As The Classroom: The Case Of “Start ‘Em Young Advocacy” At Silliman University, Philippines, Novee Elarmo Maestrecampo Jr., Giovanni Tuballa Macahig
The City As The Classroom: The Case Of “Start ‘Em Young Advocacy” At Silliman University, Philippines, Novee Elarmo Maestrecampo Jr., Giovanni Tuballa Macahig
CSID Journal of Infrastructure Development
This case study highlights the value of engaging with communities as real-world environments for practical and reflective learning. It suggests that students can develop insights and acquire knowledge through interactions with diverse groups and locations, even within urban settings. The paper presents the experience of implementing the “Start ‘em Young Advocacy,” a student-led, environment-focused, and project-based initiative within the Civic Welfare Training Service (CWTS) under the National Service Training Program (NSTP) at Silliman University, Philippines. In collaboration with the City Social Welfare and Development Office (CSWDO), CWTS students worked with thirty daycare centers. Using Kolb’s Experiential Learning Theory as a …
Barriers To Learning Exposure In Construction 4.0: Perspectives From Built-Environment Students, Olajide Julius Faremi, Habeeb Abiodun Arowolo
Barriers To Learning Exposure In Construction 4.0: Perspectives From Built-Environment Students, Olajide Julius Faremi, Habeeb Abiodun Arowolo
CSID Journal of Infrastructure Development
The ongoing digital transformation of the construction industry, known as Construction 4.0, requires students in built-environment programs to gain adequate exposure to emerging technologies. Despite this need, many faces significant barriers to meaningful engagement. This study explores the factors limiting students’ learning experiences related to Construction 4.0 in Nigerian universities and polytechnics. Using a stratified random sampling method, 154 students from one university and one polytechnic were surveyed through a structured questionnaire. Data were analyzed using frequency distribution, relative importance index, and the Mann-Whitney test. Results identify key obstacles such as limited peer collaboration, insufficient funding and resources, and weak …
Assessing The Impact Of Nigerian Seaports’ Operational Performance On The Construction Sector’S Contribution To Gdp, Ismail Gbolahan Dere, Joel Ademola Ojekunle
Assessing The Impact Of Nigerian Seaports’ Operational Performance On The Construction Sector’S Contribution To Gdp, Ismail Gbolahan Dere, Joel Ademola Ojekunle
CSID Journal of Infrastructure Development
The construction sector in Nigeria relies heavily on imported materials; however, inefficiencies and frequent delays at the seaports have led to increased costs, significantly affecting the sector’s contribution to the nation’s Gross Domestic Product (GDP). This study examines the relationship between the operational performance of Nigerian seaports and the GDP contribution of the construction sector. Secondary data on GDP and port performance indicators were obtained from the Central Bank of Nigeria (CBN) and the Nigerian Ports Authority (NPA), covering the period from 2011 to 2023. The analysis employed descriptive and inferential statistics methods, including regression and Stochastic Frontier Analysis (SFA). …
Acceptability Of The Proposed Congestion Charging System In The Central Business District Of Baguio City, Philippines, Ericka Renee A. Lanigt, Sandra S. Samantela, Ma. Catriona E. Devanadera, Casper Boongaling Agaton
Acceptability Of The Proposed Congestion Charging System In The Central Business District Of Baguio City, Philippines, Ericka Renee A. Lanigt, Sandra S. Samantela, Ma. Catriona E. Devanadera, Casper Boongaling Agaton
CSID Journal of Infrastructure Development
The City Government of Baguio is proposing a congestion charging system in the Central Business District (CBD) to address the ongoing issue of traffic congestion in the city. Although it is an effective tool, low public acceptability hinders its implementation. This study aims to assess Baguio City residents' acceptability regarding the CBD's congestion charging system. Specifically, it seeks to (1) identify the factors that influence residents’ acceptability of the proposed system, (2) evaluate whether there is a significant difference in acceptability across different road users (private vehicles, public transportation, cycling, and walking), and (3) provide recommendations for transportation policy planning …
A Model Of Trips Route Planning To Improve The Accessibility Of Public Transportation In Bengkalis City Using Geographic Information System (Gis), Nur'ain Jaafar, Hendra Saputra, Mutia Lisya
A Model Of Trips Route Planning To Improve The Accessibility Of Public Transportation In Bengkalis City Using Geographic Information System (Gis), Nur'ain Jaafar, Hendra Saputra, Mutia Lisya
CSID Journal of Infrastructure Development
The increase in population and motorized vehicles in Bengkalis City has led to greater demand for public transportation, which remains insufficient in meeting accessibility needs. This study aims to develop a model for planning public transportation routes using Geographic Information System (GIS) tools to improve accessibility in Bengkalis City. The study employs primary data from field surveys and secondary data from relevant agencies. GIS-based spatial analysis methods, such as service area analysis and the Origin-Destination (OD) matrix, are applied to evaluate accessibility and passenger movement patterns. The analysis results in two route alternatives assessed based on stop point density, community …
Technical Advances And Research Directions Of Borehole Geophysical Prospecting For Coal Mines, Cheng Jianyuan, Yan Yu, Li Yuteng, Wang Pan, Zhao Rui, Jiang Bici
Technical Advances And Research Directions Of Borehole Geophysical Prospecting For Coal Mines, Cheng Jianyuan, Yan Yu, Li Yuteng, Wang Pan, Zhao Rui, Jiang Bici
Coal Geology & Exploration
Background High-precision and long-distance exploration of geological conditions is required for coal extraction and disaster prevention in coal mines. However, traditional drilling and geophysical prospecting methods face technical bottlenecks such as insufficient exploration accuracy and limited exploration ranges. Borehole geophysical prospecting technology integrates the reliable and straightforward axial results of drilling with the high-resolution transverse results of geophysical prospecting, providing technical support for safe, efficient, and intelligent coal mining. Based on the construction spaces, this study categorizes borehole geophysical prospecting technology into four types: i.e., intra-borehole, inter-borehole, borehole-surface, and borehole-roadway. Furthermore, it presents the primary advances and applicable conditions of …
Implications Of Helium Accumulation Models In Helium-Rich Basins In China For The Enrichment And Exploration Of Helium In Coal Measures, Li Yunbo, Wang Chengtao, Song Dangyu, Shi Xiaowei, Wang Rongqi
Implications Of Helium Accumulation Models In Helium-Rich Basins In China For The Enrichment And Exploration Of Helium In Coal Measures, Li Yunbo, Wang Chengtao, Song Dangyu, Shi Xiaowei, Wang Rongqi
Coal Geology & Exploration
Background Helium is a strategic resource in serious short supply in China, and intensifying its exploration is crucial to national resource security. China enjoys abundant coal measure gas and significant potential for associated helium accumulation. However, relevant research remains in its infancy. Methods Based on a summary and analysis of helium generation, migration, and accumulation theories in natural gas reservoirs, this study systematically investigated the enrichment patterns of helium in coal measures and proposed exploration targets. Results and Conclusions The insights reveal that the helium resources in China exhibit a distribution pattern of zoning in both north-south and east-west directions. …
Advances In Research On Noble Gas As Tracers Of Geofluids And Helium Enrichment, Gao Yu, Liu Quanyou, Zhu Dongya, Wu Xiaoqi, Li Pengpeng
Advances In Research On Noble Gas As Tracers Of Geofluids And Helium Enrichment, Gao Yu, Liu Quanyou, Zhu Dongya, Wu Xiaoqi, Li Pengpeng
Coal Geology & Exploration
Background Noble gases emerge as significant tools for tracing the sources and evolutionary processes of geofluids due to their chemical inertness and different isotopic compositions across varying reservoirs. Helium serves as a noble gas tracer and a scarce resource, and its enrichment mechanisms and exploration potential have attracted wide attention.Methods Based on a summary of the geochemical data of typical gas reservoirs, volcanic gases, and surface hot springs at home and abroad, this study analyzed the interfering factors and end-member value screening in the source apportionment of noble gases. Furthermore, it summarized the applications of noble gas isotopes in …