European Journal of Engineering and Technology Research最新文献

{"title":"Transitioning from “Grey to Green”: Nature-Based Solution Seawall for Coastal Protection","authors":"Mahendra Reddy, Alvin Reddy, Shonal Singh","doi":"10.24018/ejeng.2024.9.4.3188","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.4.3188","url":null,"abstract":"\u0000\u0000\u0000\u0000The Pacific Island countries are now facing a new threat to their survival due to Climate change. Small low-lying atoll countries, as well as the coastal populations of the small island countries, are constantly threatened by climate change. With the rise of the sea level, coastlines are eroding, and villages, houses, burial grounds, arable land, and other infrastructures are gradually being washed away. The only option for sites well below sea level is to relocate the entire population to higher ground. This option is very costly and not in the best interest of the communities, given that relocation not only means moving houses and people but also breaking away from the ancestral grounds and their heritage. Construction of brick and steel seawalls is a costly option, given the number and length of walls that need to be constructed. This paper provides an alternative model, a transition from these grey structures to green nature-based seawalls that are cheap, environmentally, ecologically sound, and culturally responsible. The seawall design, required materials, methodology of construction, and engineering aspects are presented in this paper. This is the first nature-based seawall in the world—an example of using nature to deal with a problem caused by nature itself.\u0000\u0000\u0000\u0000","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":" 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141833107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of Suspended Lead Dampers in Steel Building Structural Model Subjected to Impact Load","authors":"Herish Abdullah Hussein","doi":"10.24018/ejeng.2024.9.4.3176","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.4.3176","url":null,"abstract":"\u0000\u0000\u0000\u0000This paper delves into an in-depth experimental investigation focusing on the dynamic behavior of steel frame buildings employing passive damping through suspended lead dampers. The primary objective revolves around scrutinizing a three-story steel frame building model to elucidate the effects of integrating lead dampers into the outer tubular square-section columns. By strategically embedding these dampers, the study aims to showcase the resultant reductions in both acceleration and displacement. To execute this analysis, an impact load is precisely applied to the mid-center of the middle column along the x-axis of the first story of the steel frame. The experimental setup employs six wireless accelerometers strategically positioned across the frame to capture comprehensive data on its response at diverse locations. Various quantities of lead dampers are systematically incorporated into each testing scenario to gauge the extent of passive damping’s influence on the structural response of steel buildings to impact loads. Throughout the experiments, acceleration-time relations are meticulously recorded at each story, facilitating a comparative assessment of outcomes with and without the presence of lead dampers. The findings of the study underscore a marked decrease in vibration levels at higher floors of the steel model subsequent to the installation of lead dampers within the structure. Furthermore, a noteworthy trend emerges indicating that an augmented number of lead dampers within the building yields a commensurate decrease in vibration amplitude. This detailed investigation offers valuable insights into the efficacy of passive damping mechanisms, thereby contributing to the advancement of seismic-resistant structural design practices.\u0000\u0000\u0000\u0000","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":" 87","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141672838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective Use of Catastrophe Multicriteria Decision Analysis in Delineating Groundwater Recharge Potential Zones","authors":"Md. Nasir, Uddin Khan, Md. Nozibul Haque","doi":"10.24018/ejeng.2024.9.4.3171","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.4.3171","url":null,"abstract":"Multicriteria decision analysis based on Thom’s [1] Catastrophe Theory (CT) has been applied extensively in solving various social, physical and natural sciences problems. It has become a key tool for identifying the groundwater potentiality of an area with a Geographic Information System (GIS). This paper aimed to apply catastrophe theory effectively by utilizing the standardization formulae suggested by Li et al. [2] and the modified formulae provided by Hongwei Zhu [3]. Depending on the nature of a hydrogeological parameter, CT formulae were chosen to ensure that the least important features also get attention during standardization using Hongwei Zhu's formulae where applicable, which were not possible using Li’s formulae. The standardized values of the features of all the themes obtained using four formulae were sorted in ascending order to estimate the normalized values to ensure that no normalized value of a feature exceeds the others having very close but lower standardized values. The effective use of CT technique was employed in a GIS environment to delineate groundwater recharge potential zones of the middle-west part of Kushtia district, Bangladesh, by integrating influential recharge factors, such as land type, slope, drainage density, distance from surface water bodies, soil permeability, surface clay thickness, rainfall, topographic ruggedness index, topographic curvature index, topographic wetness index and topographic position index. The groundwater recharge potential zones were classified as very good (28.76%), good (32.17%), and moderately good (39.05%) for effective CT technique. But in case of the improper use of CT covering area were 17.24%, 54.05% and 28.71% respectively, and the respective most sensitive factors are rainfall and drainage density. Finally, recharge potential zones were validated using groundwater recharge data with a determinant coefficient of 0.92 and 0.84 for effective and improper use of CT technique respectively.","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":" 30","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141675824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of an Energy Efficient Buck Based LED Driver in DCM and CCM","authors":"Fouzia Ferdous, Mahamudul Hassan, Naimur Rahman, Touhidul Hassan, Rakibul Islam","doi":"10.24018/ejeng.2024.9.3.3169","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.3.3169","url":null,"abstract":"\u0000\u0000\u0000\u0000It is the design criteria of driving LEDs at constant current and keeping the input current’s harmonics low, attaining a high power factor, and maximizing efficiency. For low power general purpose lighting buck converter can be chosen for simplicity and reduced cost. It is a difficult to improve power quality parameter like, the THD (total harmonic distortion) and power factor of ac mains. In the proposed topology, the operation for high power factor and low THD at the AC mains’ input is accomplished through buck converter operation in both discontinuous conduction mode (DCM) and continuous conduction mode (CCM) with a suitable control circuit. This paper assures constant current in both cases for suitable design of control circuit. Over voltage protection has been incorporated. To validate the LED driver circuit, simulation studies are carried out.\u0000\u0000\u0000\u0000","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":"36 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141358948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Visualization of Chladni Patterns at Low-Frequency Resonant and Non-Resonant Flexural Modes of Vibration","authors":"B. Suciu, Sota Karimine","doi":"10.24018/ejeng.2024.9.3.3165","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.3.3165","url":null,"abstract":"\u0000\u0000\u0000\u0000In this study, Chladni patterns corresponding to resonant and non-resonant vibration modes are visualized on square plates made in steel and aluminum alloys in the low frequency domain of 10–210 Hz. Using a laser sensor, the plate displacement at its central excitation point is measured, and from the obtained frequency response, the resonant and anti-resonant vibration modes are identified. Using the quality-factor method, the damping ratio corresponding to the 1st resonant peak is evaluated. Over a wide range of excitation frequencies, transitions of Chladni figures between resonant patterns via non-resonant patterns could be observed. Such Chladni figures, of the simplest geometrical configuration, can be used to achieve a certain desired movement path of the particles on the vibrating plate by controlling the excitation frequency.\u0000\u0000\u0000\u0000","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":" 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141367628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revisiting Brumadinho Dam Failure: A Methodology Study","authors":"Ana Cristina Castro Sieira, Danielle Benincá, Laís Bortolli, Alberto Ortigão","doi":"10.24018/ejeng.2024.9.3.3170","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.3.3170","url":null,"abstract":"\u0000\u0000\u0000\u0000This is a methodology testing study that uses the case history of Vale Mining’s Brumadinho Dam disaster and data from the Barcelona investigation report. This study aims to compare the results of two constitutive models for tailings: CASM and NorSand, running in the finite element program Plaxis 2D. The same senior authors carried out a previous study on four tailings dams and adopted the NorSand model and parameters obtained from piezocone and laboratory tests. Therefore, this paper aims to check if the same methodology would predict the Brumadinho Dam failure. The results show that both methods can predict Brumadinho failure, and the triggering mechanism suggested in the Barcelona report seems to be the cause of failure.\u0000\u0000\u0000\u0000","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":"30 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141378312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Distance and Travel Time Calculations in the Implementation of Non-Directional Beacon Courses","authors":"F. Sabur, Purnamawati, Muhammad Yahya, Abdul Muis, Mulyadi Nur","doi":"10.24018/ejeng.2024.9.3.3161","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.3.3161","url":null,"abstract":"\u0000\u0000\u0000\u0000This research aims to determine the design of an Android-based distance and travel time information media simulation that is capable of providing location information regarding the location of airport service facilities by implementing the working system of a navigation tool, namely Non-Directional Beacon. The subject of this research is the area of the terminal, which will be included in the application, while the research object is the location of airport public service facilities that have been provided by the airport management. The research procedure used is adapting the research and development (R&D) method to the ADDIE method approach. The data source is reference distance information on the Map application, the Auto CAD application, and the Mapplic application. The type of data is quantitative data (direct measurements in the relevant field). The instruments used in data collection are the mapplic application and the auto CAD application. The data collection technique was carried out using trials and questionnaires. The data analysis technique used is black box testing. The results of this research found a linear regression equation, namely Y = 75.531X + 41.229, with an R2 value of 0.9941. For sample 1, the length of travel time required, namely by comparing the map distance of 278.787, the travel time based on the actual distance is 82.52, so to calculate the travel time required for the distance 82.52, namely 82.52 − 41.229 = 41.291/75.531 = 0.5466 or 0.55 minutes (with rounding). While the travel time for sample II with a map distance of 732 pixels and the actual distance is 732 pixels × 0.296 meters = 216,672 meters, then the travel time required is 216,672 meters − 41,229 = 175,443/75,531 = 2.3227 or 2.32 minute. From these calculations, it is compared with the results of the time and distance obtained based on the application developed, namely the design of the directional path in the terminal by first determining the origin coordinate point and destination coordinate point in the application developed.\u0000\u0000\u0000\u0000","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":"8 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141388304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Effective Control Approach of Hybrid Energy Storage System Based on FLC/Grey Wolf Optimisation","authors":"V. Prasanna, G. Ravi","doi":"10.24018/ejeng.2024.9.2.3113","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.2.3113","url":null,"abstract":"\u0000\u0000\u0000\u0000In the modern era, the integration of renewable energy sources (RES) has bolstered the autonomy of urban energy infrastructures, reducing reliance on distant sources and grids. Batteries serve as a vital bridge between power supply and fluctuating load demands within RES systems. However, the unpredictable nature of RES behavior and varying load requirements often subject batteries to repeated deep cycles and irregular charging patterns. These cycles diminish the battery’s lifespan and escalate replacement costs. This study presents an innovative control strategy for a Solar-Wind model featuring a Battery-Supercapacitor Hybrid Energy Storage System. The objective is to prolong the battery’s operational lifespan by mitigating intermittent strain and high current demands. In contrast to conventional methods, the proposed control approach incorporates a Low-Pass Filter (LPF) and a Fuzzy Logic Controller (FLC). Firstly, the LPF minimizes the oscillations in battery consumption. Simultaneously, the FLC optimizes the high current demand on the battery while vigilantly monitoring the supercapacitor’s charge levels. Moreover, Grey Wolf Optimization (GWO) is employed to fine-tune the FLC’s membership functions, ensuring optimal peak current attenuation in batteries. The effectiveness of the proposed model is benchmarked against standard control techniques, namely Rule- Based Controller and Filtration-Based Controller. Comparative analysis reveals that the proposed method substantially reduces peak current and high power requirements of the battery. Consequently, this enhances the utilization of the supercapacitor, significantly augmenting the battery’s operational life. The results demonstrate a remarkable improvement over conventional systems, emphasizing the potential of this approach in optimizing energy storage systems for sustainable, long-term performance.\u0000\u0000\u0000\u0000","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":"11 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140785235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal Sizing and Techno-Economic Analysis of a Hybrid Power System for Postville","authors":"Azadeh Farhadi, M. T. Iqbal","doi":"10.24018/ejeng.2024.9.2.3127","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.2.3127","url":null,"abstract":"\u0000\u0000\u0000\u0000Providing reliable and sustainable electricity to remote communities poses a significant challenge. Techno-economic feasibility of an off-grid hybrid renewable energy system for Postville, a remote Northern Labrador, Canada community, is presented in this paper. The study integrates solar photovoltaic panels, wind turbines, battery storage, and diesel generators into a hybrid system, analyzing various components and optimizing using advanced Homer Pro software. Simulation results demonstrate that the most optimized hybrid structure ensures a stable power supply while minimizing diesel generator operation, reducing fuel consumption. Economically, this system offers substantial cost savings, alleviating the financial burden on the community. The designed system consists of 435 kW PV, 500 kW wind turbine, 455 kW diesel generator, and 815 kWh batteries. The proposed system will generate power with a net present cost of $5.57 million. This research also contributes to the broader goal of creating sustainable energy solutions and improving the quality of life in remote communities.\u0000\u0000\u0000\u0000","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":"29 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140395885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of Hydroxyapatite Nanoparticles Using Eggshells and Two Different Phosphate Sources","authors":"Fariba HamidiVadigh, Jafar Javadpour","doi":"10.24018/ejeng.2024.9.2.3151","DOIUrl":"https://doi.org/10.24018/ejeng.2024.9.2.3151","url":null,"abstract":"\u0000\u0000\u0000\u0000Hydroxyapatite, the primary bone substitute, has gained increased interest of researchers. The primary purpose of this study was to synthesize hydroxyapatite nanoparticles through the utilization of eggshell waste and two distinct phosphate sources ((NH4)2HPO4 and Na3PO4.12H2O). The chemical precipitation approach was chosen for this study, then the final products were named HAP-1 and HAP-2. Following this, the synthesized particles were investigated using XRD, FTIR, and SEM methods. The crystallite size of the synthesized materials was also determined by employing the Debye-Scherrer equation. The synthesis of the HAP granules was confirmed through XRD analysis, and the crystallite sizes of HAP-1 and HAP-2 were calculated to be 37.79 nm and 28.7 nm, respectively. The SEM results also indicates that the powders had a spherical-like morphology, but were highly agglomerated due to their nanoscale dimensions.\u0000\u0000\u0000\u0000","PeriodicalId":12001,"journal":{"name":"European Journal of Engineering and Technology Research","volume":"57 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140255634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}