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Preprint ARTICLE | doi:10.20944/preprints202409.1624.v1

Analysis of the Motion of a Robotic Arm for Fruit Harvesting Using Matlab Software

Maxwell Salazar, Paola Portero

Subject: Engineering, Mechanical Engineering Keywords: Kinematic analysis; Robotic arm; 4 degrees of freedom

Online: 20 September 2024 (16:19:36 CEST)

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Preprint REVIEW | doi:10.20944/preprints202401.1284.v2

Micromechanics for Polymer Matrix Laminated Composites: A Literature Review of Fundamental Models, Advances and a Trend Analysis for Future Researches

Marcelo Vitor Ferreira Machado, Felipe Perissé Duarte Lopes, Noan Tonini Simonassi, Eduardo Atem de Carvalho, Sergio Neves Monteiro

Subject: Engineering, Mechanical Engineering Keywords: micromechanics; polymer laminated composites; heterogeneous material; homogenization

Online: 20 September 2024 (16:17:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1629.v1

Research on Stator Sections Switching Process of High thrust Linear Motors

Xing Liu, Jie Li, Lianchun Wang, Minghe Qu, Danfeng Zhou, Qiang Chen

Subject: Engineering, Electrical And Electronic Engineering Keywords: High thrust linear motor; Sectionalized stator; Section switch; Anti-parallel thyristor; Current zero-crossing switching

Online: 20 September 2024 (16:15:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1634.v1

The Effects of the Modern Architecture Style on the Evolution of Mosques: A Case Study of Contemporary Mosques in Sulaymaniyah Governorate

Ahmed Qadir Ahmed, Ihsan Fethi

Subject: Engineering, Architecture, Building And Construction Keywords: Mosque Architecture; Islamic Architecture; Modern Architectural Style; Mosque Evolution; Religious Symbolism; Mosque Design Objectives; Sulaymaniyah Governorate; Indicator-based Impact Assessment

Online: 20 September 2024 (16:14:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1656.v1

A Novel Approach to the Modeling and Control of AC-DC Converters for Smart Microgrids, Incorporating Advanced Model Predictive Control for Offshore Wind Integration

Rana Saeed Ahmad, Haroon Rasheed, Muhammad Ovais Akhter

Subject: Engineering, Electrical And Electronic Engineering Keywords: smart microgrids; energy science; renewable energy; AC to DC converters; offshore wind integration; Power Electronics

Online: 20 September 2024 (15:03:24 CEST)

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This research explores a novel approach to integrating offshore wind farms into smart microgrids through the development of an advanced model predictive control (MPC) strategy for offshore wind turbines. The MPC strategy comprehensively incorporates complex wind dynamics, such as wind speed, direction, and turbulence, ensuring an accurate representation of turbine behavior. Additionally, the research includes models addressing wind farm layout, wake effects, and electrical infrastructure, enhancing the modeling framework's fidelity and applicability to real-world offshore wind energy systems within a smart microgrid environment. The inherent variability of wind power, transmission technology limitations, and the need for seamless transitions between grid-connected and islanded operation modes in smart microgrids necessitate robust control mechanisms. These mechanisms ensure efficient power capture, grid stability, and optimal energy utilization. To tackle these challenges, the research proposes a smart microgrid design incorporating both AC-DC and DC-DC conversion technologies. This design leverages renewable energy sources like solar and wind with AC-DC conversion for efficient power capture, integrates DC energy storage systems to store excess energy during low demand periods, and utilizes power control mechanisms to manage energy flow effectively within the smart microgrid. The study emphasizes the importance of modeling and control strategies for both AC-DC and DC-DC converters within the smart microgrid framework. To enhance the microgrid's cost-effectiveness, priority is given to the utilization of solar PV energy sources. It also highlights the integration of protection systems for DC faults and coordinated control of AC/DC breakers and converters. This comprehensive approach aligns with the core principles of adaptability, reliability, and sustainability in smart grids, aiming to advance smart microgrid technologies and pave the way for a more resilient, efficient, and secure energy future.

Preprint ARTICLE | doi:10.20944/preprints202409.1620.v1

Sensitivity of Dynamic Stall Models to Dynamic Excitation on Large-Flexible Wind Turbine Blades in Edgewise Vibrations

Galih Bangga

Subject: Engineering, Mechanical Engineering Keywords: aerodynamics; dynamic stall; engineering model; wind energy; wind turbine

Online: 20 September 2024 (12:44:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1588.v1

Influence of the Weaving Method (Plain, Twill, Satin) on the Hydrodynamic Behavior of Filtration Membranes Based on Banana Pseudostem Fibres (Musa balbisiana)

NSOE MENGUE Jean Jacques Nestor, Amba victoria Essegni, Egbe daniel Daniel, Boudina aimé Marie, Kofa guillaume Patrice, Ndi koungou Sylvere, Kayem joseph Guiffo

Subject: Engineering, Chemical Engineering Keywords: Banana fibers; weaving; hydrodynamics; filtration

Online: 20 September 2024 (11:49:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1611.v1

Predictive Analysis of Causal Factors Influencing Occupational Accidents in Construction Workplaces Using a Machine Learning Unified Data Model

Hajar Ait Lamkademe, Ahmed Naddami, Karim Choukri

Subject: Engineering, Safety, Risk, Reliability And Quality Keywords: machine learning; predictive analytics; data mining; safety; occupational accidents; construction; workplace; artificial intelligence; big data; incidents

Online: 20 September 2024 (11:16:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1616.v1

The Gypsum Influence On The Formation Of Secondary Phases During Autoclave Leaching Of Gold-Bearing Concentrates And The Silver Recovery Using Cyanidation

Kirill Karimov, Denis Rogozhnikov, Ilia Fomenko, Alexander Zavalyuev, Maksim Tretiak, Oleg Dizer

Subject: Engineering, Metallurgy And Metallurgical Engineering Keywords: autoclave leaching; gypsum; sulfuric acid; lime boiling; sulfide; silver; gold; cyanidation

Online: 20 September 2024 (11:08:03 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1525.v1

Web Platforms for the Management and Sharing of Data: Applications, Uses, Potentialities. A State of the Art

Franco Spettu, Cristiana Achille, Francesco Fassi

Subject: Engineering, Architecture, Building And Construction Keywords: Web platforms; data integration; 3D information system; Collaborative platform; Cloud computing; 3D survey; 3D data; Built environment

Online: 20 September 2024 (10:44:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1516.v1

Optimal Sizing, Energy Balance, Load Management and Performance Analysis of a Hybrid Renewable Energy System

Kelvin Nkalo Ukoima, Okoro Ogbonnaya, Patrick Ifeanyi Obi, Akuru Bola, Innocent Ewaen

Subject: Engineering, Electrical And Electronic Engineering Keywords: Feasibility; Hybrid; Power; Homer; Solar; Wind

Online: 20 September 2024 (10:42:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1431.v1

A State-Space Analysis and an Optimal Control Synthesis for a Class of Linear Time-Optimal Control Problems

Borislav Penev

Subject: Engineering, Control And Systems Engineering Keywords: Time-optimal control; Minimum time control; Pontryagin's maximum principle; Synthesis of optimal systems; Linear systems; switching surface

Online: 20 September 2024 (09:49:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1577.v1

Influence of Selected Processing Variables on Quality Attributes of Cocoa Pod-Husk Pellets

Simeon Olatayo Jekayinfa, Christopher Chintua Enweremadu

Subject: Engineering, Energy And Fuel Technology Keywords: Biomass; cocoa pod husk; pellets; biofuel; compression ratio

Online: 20 September 2024 (05:00:20 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1571.v1

Review on Evaporative Cooling Systems for Application in Buildings in Hot and Dry Climates

Misrak Girma Haile, Roberto Garay Marinez, Ana Macarulla Arenaza

Subject: Engineering, Mechanical Engineering Keywords: Building; Evaporative Cooling System; Hybrid; Effectiveness; Hot-Dry Climate

Online: 20 September 2024 (03:13:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1498.v1

Mean Droplet Size Prediction of Twin Swirl Airblast Nozzle at Elevated Operating Conditions

Jiaming Miao, Bo Wang, Guangming Ren, Xiaohua Gan

Subject: Engineering, Aerospace Engineering Keywords: Twin swirl airblast nozzle; Sauter mean diameter; Atomization; Prediction model; Elevated conditions

Online: 19 September 2024 (17:21:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1540.v1

Real-Time Modelling for Design and Controlling of Material Additive Manufacturing Processes

Amir M. Horr

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: additive manufacturing, real time modelling, machine learning, hybrid physical-data driven modelling

Online: 19 September 2024 (15:58:17 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1496.v1

Generative AI and Higher Education: Trends, Challenges, and Future Directions from a Systematic Literature Review

João Batista, Anabela Mesquita, Gonçalo Carnaz

Subject: Engineering, Other Keywords: generative artificial intelligence; higher education; systematic literature review; PRISMA; ChatGPT; academic integrity; educational technology

Online: 19 September 2024 (15:45:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1529.v1

A Study on the Charring Properties of Glued Laminated Korean Larch Timber Columns

Yunjeong Choi, Kwonhyuk Baik, Suho Kim, Jaehong An

Subject: Engineering, Civil Engineering Keywords: Charring properties; Fire resistance performance; Glued laminated timber; Korean larch

Online: 19 September 2024 (15:36:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1539.v1

The Detection and Classification of Scaphoid Fracture in Radiograph by Using the Convolutional Neural Network

Ming-Huwi Horng, Tai-Hua Yang, Yung-Nien Sun, Rong-Shiang Li

Subject: Engineering, Bioengineering Keywords: medical image; scaphoid bone; scaphoid fractures,; multi-view detection and segmantation; convolutional neural network

Online: 19 September 2024 (13:53:32 CEST)

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Objective: Scaphoid fractures, particularly occult and non-displaced fractures, are difficult to detect using traditional X-ray methods due to their subtle appearance and variability in bone density. The study proposes a two-stage CNN approach to detect and classify scaphoid fractures using anterior-posterior (AP) and lateral (LA) X-ray views for more accurate diagnosis. Methods: The study emphasizes the use of multi-view X-ray images (AP and LA views) to improve fracture detection and classification. The multi-view fusion module helps integrate information from both views to enhance detection accuracy, particularly for occult fractures that may not be visible in a single view. The proposed method includes two stages that are stage 1: Detect the scaphoid bone using Faster R-CNN and Feature Pyramid Network (FPN) for region proposal and small object detection. The detection accuracy for scaphoid localization is 100% with Intersection over Union (IoU) scores of 0.8662 for AP views and 0.8478 for LA views. And stage 2: Perform fracture classification using a ResNet backbone and FPN combined with a multi-view fusion module to combine features from both AP and LA views. This stage achieves a classification accuracy of 89.94%, recall of 87.33%, and precision of 90.36%. Results: The proposed model performs well in both scaphoid bone detection and fracture classification. The multi-view fusion approach significantly improves recall and accuracy in detecting fractures compared to single-view approaches. In scaphoid detection, both AP and LA views achieved 100% detection accuracy. In fracture detection, using multi-view fusion, the accuracy for AP views reached 87.16%, and for LA views, it reached 83.83%. Conclusion: The multi-view fusion model effectively improves the detection of scaphoid fractures, particularly in cases of occult and non-displaced fractures. The model provides a reliable, automated approach to assist clinicians in detecting and diagnosing scaphoid fractures more efficiently.

Preprint ARTICLE | doi:10.20944/preprints202409.1541.v1

Multi-Timescale Reactive Power Optimization and Regulation Method for Distribution Networks Under Multisource Interaction Environment

Hanying Zhou, Junyu Liang, Xiao Du, Mengtong Wu

Subject: Engineering, Electrical And Electronic Engineering Keywords: distribution network; distributed energy resources; model predictive control; voltage zoning control strategy ;

Online: 19 September 2024 (13:52:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1536.v1

Key factors for BIM Implementation in the Context of ESG and SDGs Integration: A Systematic Literature Review

Wu Jing, Aidi Hizami Alias

Subject: Engineering, Civil Engineering Keywords: BIM; BIM implementation; ESG; SDGs; Systematic Literature Review; Stope Framework

Online: 19 September 2024 (13:20:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1526.v1

Associated Gas Recovery Integrated with Solar Power for Produced Water Treatment: Techno-Economic & Environmental Impact Analyses

Daniel H. Chen, Fuad Samier Aziz, Gevorg Sargsyan

Subject: Engineering, Energy And Fuel Technology Keywords: Economic feasibility; tax credits; produced water; desalination; flare gas recovery; brine disposal; photovoltaic cell; solar thermal collector

Online: 19 September 2024 (12:39:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1434.v1

Influence of Process Parameters on the Mechanical Properties of 3D printed Metallic Specimens of Steel 1.2709 and 1.4542

Varun Vashist, Dr. Oldal Istvan, Rawabe Fatima Faidallah, Dr. Zoltan Szakal

Subject: Engineering, Mechanical Engineering Keywords: Additive manufacturing; steel; laser power; laser scan velocity; impact strength; maximum stress

Online: 19 September 2024 (12:07:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1487.v1

Research on the Mechanics and Cutting Performance of Multilayer Nanostructured TiAlN/TiSiN/ZrN Coatings

Mingxing Li, Zhiyu Fan, Wenhai Zang, Jiankang Zhang

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: coating; endmills; milling; cemented carbide; Ti6Al4V

Online: 19 September 2024 (12:03:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1491.v1

Coupled System of Dual-Axis Clinostat and Helmholtz Cage for Simulated Microgravity Experiments

Maciej Malczyk, Tomasz Blachowicz, Andrea Ehrmann

Subject: Engineering, Aerospace Engineering Keywords: clinostat; Earth magnetic field; simulated microgravity; plant growth

Online: 19 September 2024 (11:52:56 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1474.v1

Sustainability in Long-term Surface Mine Planning: A Systematic Review of Operations Research Applications

Mehri Aghdamigargari, Sylvester Avane, Angelina Anani, Sefiu O. Adewuyi

Subject: Engineering, Mining And Mineral Processing Keywords: Surface mine planning; Sustainability; OR methods; Optimization techniques

Online: 19 September 2024 (11:33:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1473.v1

Gold Recovery from Smelting Copper Sulfide Concentrate

Elmira Moosavi-Khoonsari, Nagendra Tripathi

Subject: Engineering, Metallurgy And Metallurgical Engineering Keywords: Gold Recovery; Copper Smelting; Smelting Technologies; Economic Importance; Copper Sulfide Concentrate; Gold Loss

Online: 19 September 2024 (11:16:58 CEST)

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Gold is a significant revenue source for custom copper smelters facing profitability challenges due to low treatment and refining charges, stricter regulations, and rising costs. Gold is also often blended with copper concentrates, but precise recovery rates from smelting processes are poorly documented despite gold critical economic importance. This paper aims to provide the first comprehensive estimates of gold first-pass recovery across various operational units within the copper sulfide concentrate processing flowsheet. It evaluates the effectiveness of different copper smelting and converting technologies in recovering gold. Optimizing gold first-pass recovery is especially important to enhance immediate financial returns and responsiveness to market dynamics, allowing companies to capitalize on favorable gold prices without delays. Given the absence of direct measurements for gold recovery rates, this research develops an estimation method based on understanding gold loss mechanisms during smelting. The study identifies and analyzes key input and output parameters by examining data from various copper producers. By correlating these parameters with gold loss, the research estimates gold first-pass recovery rates within the copper smelting process. Among integrated smelting-converting routes, the flash smelting to Peirce-Smith converting route achieves the highest gold first-pass recovery (98.8–99.5%), followed by the Mitsubishi continuous smelting and converting process (94.3–99.8%), bottom-blowing smelting to bottom-blowing converting (95.8%), flash smelting to flash converting (95.5%), Teniente smelting to Peirce-Smith converting (95.2%), and the Noranda continuous smelting and converting process (94.8%). The final recovery rates are expected to be higher considering the by-products internal recirculation and post-processing within the copper flowsheet. Additionally, superior gold recoveries are attributed to advanced metallurgical practices and control systems, which vary even among companies with similar technologies. The research demonstrates that copper smelting can effectively recover over 99% of gold from sulfide concentrates. Gold accumulates up to 1000 times its original concentration in anode slime during electrolytic refining, generating 5-10 kilograms of slime per ton of copper, which is further processed to recover gold and other by-products. Major smelters operate precious metal plants where recovering gold from highly concentrated anode slime is both cost-effective and efficient.

Preprint ARTICLE | doi:10.20944/preprints202409.1502.v1

Description and In‐Flight Assessment of the POSEIDON‐3C Altimeter of the SWOT Mission

Alexandre Guérin, Fanny Piras, Nicolas Cuvillon, Alexandre Homerin, Sophie Le Gac, Claire Maraldi, François Bignalet-Cazalet, Marta Alves, Laurent Rey

Subject: Engineering, Aerospace Engineering Keywords: POSEIDON‐3C; SWOT; altimeter; nadir; altimetry; LRM; DEM; tracking; calibration; validation

Online: 19 September 2024 (10:52:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1367.v1

Parallel Simplex: An Alternative to Classical Experimentation: Case Study

Francisco Zorrilla Briones, Inocente Yuliana Meléndez Pastrana, Manuel Alonso Rodríguez-Morachis, José Luís Anaya Carrasco

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: optimization; design of experiments; variable simplex; evolutive operations; canonical analysis; RSM

Online: 19 September 2024 (08:52:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1479.v1

Enhanced SAR Compression through Multi-Look Doppler Compensation and Auto-Focusing Technique

HyeonSeong Kim, YongHwi Kwon, ChulKi Kim

Subject: Engineering, Electrical And Electronic Engineering Keywords: Synthetic Aperture Radar; Doppler Estimation; Auto-Focusing; Fractional Fourier Transform

Online: 19 September 2024 (08:39:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1370.v1

Stochastic Decision-Making Optimization Model for Large Electricity Self-Productors Using Natural Gas in Industrial Processes: An Approach Considering a Regret Cost Function

Laís Leonel, Mateus Balan, Luiz Armando Camargo, Dorel Ramos, Roberto Castro, Felipe Clemente

Subject: Engineering, Electrical And Electronic Engineering Keywords: Energy procurement; Load-supply flexibility; Integrated stochastic optimization model; regret cost

Online: 19 September 2024 (08:38:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1447.v1

Photothermal Conversion Performance of Fe3O4/ATO Hybrid Nanofluid for Direct Absorption Solar Collector

Jeonggyun Ham, Hyemin Kim, Honghyun Cho

Subject: Engineering, Mechanical Engineering Keywords: hybrid nanofluid; optical properties; solar weight absorption coefficient; photothermal conversion coefficient; direct absorption solar collector

Online: 19 September 2024 (07:48:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1420.v1

Decision Analysis Approaches on the Collection Methods of Polyethylene Terephthalate Waste

Johnson A. Oyewale, Lagouge K. Tartibu, and Imhade P. Okokpujie

Subject: Engineering, Mechanical Engineering Keywords: PET waste; AHP; TOPSIS; VIKOR; entropy weights; equal weights

Online: 19 September 2024 (07:39:23 CEST)

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The rising challenge of polyethylene terephthalate (PET) waste necessitates efficient collection methods to mitigate environmental impacts. The Analytic Hierarchy Process (AHP) is one of the Multi-Criteria Decision Analysis (MCDA) approaches utilized in this study. The Technique for Order of Preference by Similarity to the Ideal Solution (TOPSIS) was used to rank each alternative according to the objective weight that AHP had produced. Also, sensitivity analysis was performed to determine how robust the findings were when considering equal weights and entropy weights to maximize PET waste collection techniques. The alternative achieved the objective of obtaining the best collection method, Threshold Plastic Bottle Waste Collection (Tpbw), out of all the three alternatives considered. Another MCDA approach, VIseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR), was used to compare the results and validate the ranking result achieved by the TOPSIS method. The VIKOR technique's validation of the TOPSIS approach showed that the outcomes were highly consistent. Data for the study were gathered from the archives of waste management companies on possible practices of plastic waste collection addressing costs, environmental impacts, social acceptance, feasibility, and efficiency. The findings provide a prioritized framework for enhancing PET waste collection strategies, contributing to sustainable waste management. Many criteria are considered when deciding the best collecting method for PET waste recycling, making it challenging. By using criteria importance, multi-criteria decision analysis (MCDA) was applied in this study, and the objective weight of the criteria was determined using the analytic hierarchy process (AHP). The five criteria considered in this study are Initial investment cost, Operational cost, Transportation cost, Environmental risk, Employment potential, and the objective weights allocated to them. AHP results 0.4952, 0.1997, 0.1565, 0.0870, and 0.0616 are respectively determined.

Preprint ARTICLE | doi:10.20944/preprints202409.1368.v1

A Study on Tooth Wear Mechanisms During the Bandsawing of Cr12MoV with Bimetal Bandsaw Blade

Yuzhen Jia, Jigang Wu, Yuqiang Chen, Bing Chen, Guoyue Liu, Zhiyong Ouyang

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: bimetal bandsaw blade; Cr12MoV; chipping; abrasive wear; adhesive wear; high-speed photography

Online: 19 September 2024 (07:32:48 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1471.v1

Review of Green Water Systems for Urban Flood Resilience: Literature and Codes

Sebastián Valencia-Félix, Johan Anco-Valdivia, Alain Jorge Espinoza Vigil, Alejandro Víctor Hidalgo Valdivia, Carlos Sanchez-Carigga

Subject: Engineering, Civil Engineering Keywords: Green Water Systems; Blue-Green Infrastructure; Sustainable Urban Drainage Sys-tems; Design Code; Urban Drainage System; Green-Gray Infrastructure; Urban Flood Resilience; Nature Based Solutions; Systematic Search

Online: 19 September 2024 (05:40:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1451.v1

Toward a Comprehensive Economic Comparison Framework for Solar Projects: A Case Study of Utility and Residential Scales

Bowen He, Han Zheng, Qixiao Zhang, Yayan Zhao, Huaizhi Tang, Ping Xi, Laiwei Wei, Muqing Li, Qun Guan

Subject: Engineering, Energy And Fuel Technology Keywords: Utility Solar Farms; Cost-Benefit Analysis; Economic Analysis; Life Cycle Approach; Battery Energy Storage System (BESS); Grid-tie Residential Solar Systems

Online: 18 September 2024 (16:43:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1414.v1

Design Methods of Aluminium Pin-Ended Columns with Topology Optimised Cross Sections

Mehmet A Güler, Aykut Artac, Bora Yildirim, Konstantinos Daniel Tsavdaridis

Subject: Engineering, Civil Engineering Keywords: aluminium, columns, FE analysis, topology optimisation, DSM, CSM

Online: 18 September 2024 (12:56:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1401.v1

Effects of Salt Concentration on a Magnetic Nanoparticle-Based Aggregation Assay with a Tunable Dynamic Range

Gabrielle Rose Moss, Christian Knopke, Solomon G Diamond

Subject: Engineering, Bioengineering Keywords: aggregation assay; magnetic particle spectroscopy; biosensor; tunable dynamic range

Online: 18 September 2024 (12:07:18 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1412.v1

Design and Development of a Self-Sufficient Riding Reaper Machine

Berisso Woyessa Bekele

Subject: Engineering, Mechanical Engineering Keywords: harvesting; reaper machine; mechanization; cost reduction; efficiency; product development; planning; testing

Online: 18 September 2024 (12:04:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1361.v1

Construction of Lyapunov Certificates for Systems on Torus Using Trigonometric Polynomials

Mahmut Kudeyt, Swapnil Tripathi, Alkım Gökçen, Savaş Şahin, Ozkan Karabacak

Subject: Engineering, Control And Systems Engineering Keywords: almost global synchronization; trigonometric polynomials; stability certificates

Online: 18 September 2024 (11:38:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1387.v1

Study on the Design of a New Three-Dimensional Seismic Isolation Bearing Based on Improved Genetic Algorithm for Bridge Engineering

Ying Sheng, Zhenchao Yang, Yu Meng, Bin Jia

Subject: Engineering, Civil Engineering Keywords: three-dimensional seismic isolation bearing; bridge engineering; sensitivity of the design parameters; improved genetic algorithm; good seismic isolation effect

Online: 18 September 2024 (11:12:51 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1307.v2

Exploring the Frontier of Semiconductor Technologies: Innovations, Sustainability and Future Opportunities—A Review

Luckman Yeboah, Peter Agyemang, Ayinawu Abdul Malik, Prince Acheampong, Joseph Morgan, Rose Addo, Boris Williams Henyo

Subject: Engineering, Metallurgy And Metallurgical Engineering Keywords: semiconductor; microchip; hardware; sustainability; transistors; manufacturing

Online: 18 September 2024 (10:42:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1347.v1

Evaluating Stacked Dielectric Elastomer Actuators as Soft Motor Units for Forming Artificial Muscles in Biomimetic Rehabilitation Robots

Vahid Mohammadi, Sahel Mohammadi Ghalehney, Mohammad Tajdani, Samuel C.K. Lee, Ahad Behboodi

Subject: Engineering, Bioengineering Keywords: Actuators; Muscles; Rehabilitation robotics; Soft robotics; SDEA; Force.

Online: 18 September 2024 (10:26:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1375.v1

Enhancing Upper Limb Stroke Rehabilitation with Electromyography-Monitored Virtual Reality-Based Games

Zunaidi Ibrahim, Basri Noor Cahyadi, Azlan Aziz, Ahmad Shamil

Subject: Engineering, Control And Systems Engineering Keywords: Upper limb rehabilitation; VR Games Rehabilitation; Electromyography (EMG); Deltoid Muscle Recovery; Kinect Xbox; Control Rehabilitation

Online: 18 September 2024 (08:21:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1231.v1

Simplified Modelling Techniques for Dynamic Wireless Power Transfer

Krzysztof Jakubiak, Jun Liang, Liana Cipcigan, Chuanyue Li, Jinzhe Wu

Subject: Engineering, Electrical And Electronic Engineering Keywords: dynamic wireless power transfer; wireless power transfer; electric vehicles; dynamic wireless charging; mutual inductance; system modeling; high-frequency simulation; wireless charging; system modeling

Online: 18 September 2024 (05:35:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1228.v1

A Decentralized Digital Watermarking Framework for Secure and Auditable Video Data in Smart Vehicular Networks

Xinyun Liu, Ronghua Xu, Yu Chen

Subject: Engineering, Electrical And Electronic Engineering Keywords: Intelligent Transportation System (ITS); Internet of Vehicles (IoV); Digital Watermarking; Deep Learning; Blockchain; Security

Online: 18 September 2024 (05:22:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1244.v1

The Influence of In-Plane Constraints on Fatigue Crack Growth Rate

Jaroslaw Galkiewicz, Urszula Janus-Galkiewicz, Sebastian Lipiec

Subject: Engineering, Mechanical Engineering Keywords: fatigue crack growth; Paris’ law; in-plane constraints; brittle fracture; Williams’ solution

Online: 18 September 2024 (05:17:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1345.v1

Barriers to the Effective Selection of Sustainable Materials for Residential Building Projects: An Expert Perspective

Constant Mahame, Geraldine J. Kikwasi, Modest Maurus Baruti

Subject: Engineering, Architecture, Building And Construction Keywords: Sustainable Building Materials; Residential Building Projects; Barriers to Selection; Tanzania Construction Industry

Online: 17 September 2024 (16:50:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1297.v1

Development of Chitosan Scaffold Carrier Device for Absorption and Controlled Release of Iron Chloride Using In Vitro Methods of Characterization

Ingrid Russoni de Lima, Márcio Teodoro Fernandes, Cristiane Xavier Resende, Bonifácio Oliveira Fialho, Leonardo Martins Silva, Charle Correia da Silva, Gláucio Soares da Fonseca, Renata Antoum Simão, José Adilson Castro, Marcos Flávio de Campos

Subject: Engineering, Bioengineering Keywords: chitosan scaffold; physicochemical characterization; iron chloride; controlled release model simulation ;

Online: 17 September 2024 (11:55:11 CEST)

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Preprint CONCEPT PAPER | doi:10.20944/preprints202409.1301.v1

CFD Simulation and Aerodynamic Optimization of Turbomachinery Based on Modified NSGA-II

Leila Khanhosseini

Subject: Engineering, Aerospace Engineering Keywords: Computational Fluid Dynamics; NSGA-II; Artificial Neural Network; Turbomachinery; Optimization

Online: 17 September 2024 (11:49:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1286.v1

Fuzzy Logic based Energy Management Strategy for Hybrid Fuel Cell Electric Ship's Power and Propulsion System

Evaggelia Nivolianiti, Yannis L Karnavas, Jean-Frédéric Charpentier

Subject: Engineering, Marine Engineering Keywords: fuel cell propulsion system; fuzzy logic control; energy management strategy; hybrid energy storage system; energy efficiency; ship electrification

Online: 17 September 2024 (11:38:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1317.v1

Alternative Slope-Deflection Equations for Static Analysis of Indeterminate Structures

Dayakar Naik Lavadiya, Eric Vincent Garcia, Clare M Pankratz, Kristine M Kalthoff

Subject: Engineering, Civil Engineering Keywords: Slope-Deflection; Indeterminate Structure; Beams; Frames

Online: 17 September 2024 (11:36:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1266.v1

Preparation and Refinement Mechanism of a New Master Alloy Al-5Ti-1B-1RE Refiner

Zhengjun Wang, Shanmin Wang, Quanquan Yang, Xinyang Liu, Chen Dong, Lianxiang Liu

Subject: Engineering, Metallurgy And Metallurgical Engineering Keywords: Al-5Ti-1B-1RE master alloy; Industrial pure aluminum; Refinement effect; Refine performance; double nucleus refinement mechanism

Online: 17 September 2024 (10:51:28 CEST)

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To obtain high quality grain refiner, a new Al-5Ti-1B-1RE master alloy grain refiner was synthesised by melt-matching method. Thermodynamic calculations and kinetic analyses, which were seriously missing from the study of key issues during the preparation process, were investigated. The microstructure and properties, comparison of the refining effect of different grain refiners on industrial pure aluminium and its refining mechanism were analysed with the help of X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM) and energy spectroscopy, transmission electron microscopy (TEM) and an electronic universal testing machine (CSS-44100). The experimental results show that the second-phase particles in the Al-5Ti-1B-1RE master alloy matrix synthesised by the melt-matching method are mainly TiB2、 A13Ti、Ti2A120RE, etc. The magnitude of the free energy ΔG of the synthesis reaction is calculated to be ΔGTiB2<ΔGAl3Ti<ΔGTi2A120RE. When the temperature is low (undercooling ΔT is large), the nucleation rate N mainly depends on the kinetic atomic diffusion activation energy Q, while the thermodynamic nucleation work becomes a secondary factor, and vice versa. The industrial pure aluminum refined by the new grain refiner has almost transformed from coarse columnar crystals to fine equiaxed crystals, with an average grain size of 70.2 μm, which was 36.18% and 20.66% smaller than that refined by domestic and imported Al-Ti-B wire master alloy grain refiner, and its mechanical properties of tensile strength σb was increased by 11.94%, 8.29%, and elongation at break δ was improved by 31.79%, 17.41%, respectively. The main mechanism for refining pure aluminum in Al-5Ti-1B-1RE master alloy is the formation of TiA13 on TiB2 particles, the release of RE atoms from Ti2A120RE phase surrounding TiAl3, and the partial transformation into TiA13 phase, which promotes the dual nucleation refinement mechanism and the pinning effect of rare earth elements on grain boundaries.

Preprint REVIEW | doi:10.20944/preprints202409.1307.v1

Exploring the Frontier of Semiconductor Technologies: Innovations, Sustainability and Future Opportunities—A Review

Luckman Yeboah, Peter Agyemang, Ayinawu Abdul Malik, Prince Acheampong, Joseph Morgan, Rose Addo, Boris Williams Henyo

Subject: Engineering, Metallurgy And Metallurgical Engineering Keywords: semiconductor; microchip; hardware; sustainability; transistors; manufacturing

Online: 17 September 2024 (10:49:22 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1175.v1

Advanced Techniques for Evaluation of Underground System

Wei Zhang

Subject: Engineering, Architecture, Building And Construction Keywords: Advanced; Techniques; Evaluation; Underground System; Pipelines

Online: 17 September 2024 (05:03:12 CEST)

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Pipelines are regularly trenched and then forgotten, just allowed to run till failure and producing an overall incredibly poorly run system that is ripe for improvements. One of the most needed areas for improvement are proactive methods for condition assessment of existing pipelines. This can be divided into two main categories: proactive condition assessment technologies and nonstructural proactive condition improvement technologies. The objective of this paper is to identify the best option available on the market for both these areas of proactive condition assessment for existing pipelines. The compared proactive condition assessment technologies include Acoustic Resonance Testing, Ultrasonic Thickness Measurement Testing, Phased Array Ultrasonic Testing, Pulsed Eddy Current Testing, and the Multisensor ROV. The technologies compared for nonstructural proactive condition improvement were Jetting, Pigging and also included the main requirements for a proper catalog of pipe information that can be used to produce a ranked system for assessing which pipes are at highest risk for failure and can be used to efficiently direct resources for pipe maintenance. The final conclusion was that Acoustic Resonance Testing and the Multisensor ROV are the two best products available for the proactive condition assessment of existing pipelines available on the market from their versatility of application and amount of information gathered during pipe inspection. The best option available in the group of nonstructural proactive condition improvement technologies was pigging for its incredibly low risk and low social impact as well as potential for improvement in the near future. It was also concluded that every agency would be better off with a catalog of the pipe material, age, length, diameter, and burial depth to know the location of every pipe an agency owns as well as to rank every pipe in terms of risk of failure and impact of said failure to most efficiently direct resources.

Preprint ARTICLE | doi:10.20944/preprints202409.1272.v1

Influence of Fibers on Shear Behavior of Concrete Beams Reinforced with Steel and GFRP Rebars

Rajkumar R, Umamaheswari Nambiappan, George Wardeh

Subject: Engineering, Civil Engineering Keywords: concrete beams; GFRP bars; shear failure; steel fiber

Online: 17 September 2024 (03:31:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1265.v1

Coastal Protection for Tsunamis

Angela Santos, Nelson Mileu

Subject: Engineering, Marine Engineering Keywords: coastal protection; tsunami; field survey; tsunami numerical model; Portugal

Online: 17 September 2024 (00:39:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1261.v1

Impact of face masks on acoustic parameters for Forensic Speaker Recognition

André Saraiva, Attila Fejes, Jelena Devenson

Subject: Engineering, Electrical And Electronic Engineering Keywords: forensic speaker recognition; face mask; acoustic-phonetic approach

Online: 16 September 2024 (16:46:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1227.v1

Prediction of Gas-Water Multiphase Flow Behaviour and Hydrates Severity in Gas-Dominant Subsea Pipeline

Oghenethoja Monday Umuteme, Sheikh Zahidul Islam, Mamdud Hossain, Aditya Karnik

Subject: Engineering, Energy And Fuel Technology Keywords: Hydrate Deposition Rates; Computational Fluid Dynamics; Hydrate Plugging and Pipe Blockage; Gas Mass Flowrate; Water Mass Flowrate.

Online: 16 September 2024 (14:26:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1245.v1

Stochastic H∞ Filtering of the Attitude Quaternion

Daniel Choukroun, Lotan Cooper, Nadav Berman

Subject: Engineering, Aerospace Engineering Keywords: Stochastic H∞ filtering; Attitude determination; Quaternion; Uncertain sensor variance

Online: 16 September 2024 (14:24:05 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1220.v1

Revision of Robotic Prostheses Manufactured with 3D Printing: Advances, Challenges and Future Perspectives

Maxwell Salazar, Paola Portero, Marcelo Zambrano, Ricardo Rosero

Subject: Engineering, Bioengineering Keywords: Robotic prostheses; 3D printing; personalized design.

Online: 16 September 2024 (12:26:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1216.v1

Petrographic and Geo-Mechanical Characteristics of Inzari Formation of Nizampur Basin, Nowshera District, Khyber Pakhtunkhwa, Pakistan

Hassan Ayaz, Jaincong Xu, Muhammad Usama Aslam, Sohail Ahmad, Junaid Ali

Subject: Engineering, Civil Engineering Keywords: inzari formation; geo-mechanical characteristics; petrography characteristic; building material; Nizampur basin

Online: 16 September 2024 (11:50:47 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1201.v1

Assessing Seismic Vulnerability Methods for RC-Frame Buildings in Pre- and Post-Earthquake

Mabor Achol Achol Samuel, Ergang Xiong, Haris Mahmood, Lekeufack Beco Chenadaire, Yupeng Xie, Yufei Han

Subject: Engineering, Civil Engineering Keywords: damage; post-earthquake; mitigation strategies; seismic risk; empirical method; analytical method; earthquake

Online: 16 September 2024 (11:48:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1222.v1

Power Signal Histograms: A Method of Power Grid Data Compression on the Edge for Real-time Incipient Fault Forensics

Joshua H. Tyler, Donald R. Reising, Thomas Cooke, Anthony Murphy

Subject: Engineering, Electrical And Electronic Engineering Keywords: Incipient Fault Prediction; Power Grid; Smart Grid; Data Compression; Event Forecasting; State Estimation; Real-Time Grid Analysis; Image Registration

Online: 16 September 2024 (11:35:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1213.v1

Investigation of Water Hammer Effect on the Transmission Main Pipeline of Su’ula -Manda Water Supply Schemes, Afar, Ethiopia

Seid Mohammed Suwalih, Kinfe Kassa

Subject: Engineering, Civil Engineering Keywords: Water Hammer, Pressure fluctuations, Hydro-pneumatic tank, Maximum pressure, Cavitation

Online: 16 September 2024 (10:33:54 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1195.v1

Spent Ncm Lithium-Ion Batteries: Potential Evaluation of Mechanical Pre-Treatment for Recycling

Priscila Silva Silveira Camargo, Maryanne Hoffmann Cardoso, Roberta dos Reis Costantin, Marcelo Pilotto Cenci, Felipe Antonio Lucca Sánchez, Angela Cristina Kasper, Hugo Marcelo Veit

Subject: Engineering, Other Keywords: Spent Lithium-Ion Batteries; NCM Cell; Recycling; Economic Potential; Environmental Impact; Scarcity

Online: 16 September 2024 (10:16:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1199.v1

A Soft Exoskeleton System Based-On Segmented Composite Proprioceptive Bending Actuators for Hand Rehabilitation ADL Tasks

Kai Li, Daohui Zhang, Yaqi Chu, Xingang Zhao, Shuheng Ren, Xudong Hou

Subject: Engineering, Bioengineering Keywords: Joint stiffness predicted; extension angle; Segmented Composite Proprioceptive Bending Actuators (SCPBAs); bending resistance; soft hand exoskeleton system

Online: 16 September 2024 (10:15:34 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1167.v1

Improving Urban Energy Efficiency with Ground Source Heat Pump Systems Integrated with Energy Piles

Thiti Chanchayanon, Susit Chaiprakaikeow, Apiniti Jotisankasa, Shinya Inazumi

Subject: Engineering, Civil Engineering Keywords: energy pile; geothermal energy system; ground source heat pump; heat transfer mechanism; renewable energy efficiency; smart city infrastructure; sustainable urban development; urban heat island effect

Online: 16 September 2024 (10:11:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1163.v1

An Analysis Comparing the Taguchi Method for Optimizing the Process Parameters of AA5083/Silicon Carbide and AA5083/Coal Composites That Are Fabricated via FSP

Oritonda Muribwathoho, Velaphi Msomi, Sipokazi Mabuwa

Subject: Engineering, Mechanical Engineering Keywords: Aluminium alloys; Composite; Metal Matrix Composite; Mechanical Properties; Friction Stir Welding; Friction Stir Processing; Taguchi; S/N Ratio; ANOVA

Online: 16 September 2024 (10:00:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1155.v1

Effectiveness of Generative AI for Post-Earthquake Damage Assessment

João M. C. Estêvão

Subject: Engineering, Civil Engineering Keywords: Post-Earthquake Damage Assessment; Generative Artificial Intelligence; Damage Classification; EMS-98 Scale

Online: 16 September 2024 (09:51:14 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1170.v1

GOOSE Secure: A Comprehensive Dataset for In-Depth Analysis of GOOSE Spoofing Attacks in Digital Substations

Oscar Andrés Tobar-Rosero, Omar Roa Romero, Germán Darío Rueda Carvajal, Alexander Leal, Juan Felipe Botero, Sergio Armando Gutierrez, John Willian Branch, Germán Darío Zapata

Subject: Engineering, Electrical And Electronic Engineering Keywords: Cybersecurity; Dataset; Digital Substation; GOOSE protocol; IEC 61850; Smart Substation; Spoofing attack

Online: 16 September 2024 (09:48:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1172.v1

Hydration and Mechanical Properties of Cement Kiln Dust Blended Cement Composite

Woo-Seok Lee, Young-Cheol Choi

Subject: Engineering, Civil Engineering Keywords: cement kiln dust; hydration; compressive strength

Online: 16 September 2024 (09:41:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1192.v1

Air Attenuation in Octave Bands and How to Normalize Room Acoustic Measurements to a Standard Atmosphere

Jens Holger Rindel

Subject: Engineering, Architecture, Building And Construction Keywords: sound absorption; air attenuation; room acoustic measurements; octave band; air temperature; relative humidity

Online: 16 September 2024 (09:39:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1088.v1

Adaptive Sliding Mode Control for Trajectory Tracking of Quadrotor UAV under Input Saturation and Disturbances

Jingyang Kuang, Mou Chen

Subject: Engineering, Aerospace Engineering Keywords: trajectory tracking control; sliding mode control; disturbance observer; input saturation; parametric uncertainties

Online: 16 September 2024 (07:32:43 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.1150.v1

Performance of Permeable Pavement Systems: A Review and Future Solutions

Simon Avaungwa Terkura, Shatirah Akib

Subject: Engineering, Civil Engineering Keywords: sustainable urban design; permeable pavement; pollutant removal; flood mitigation

Online: 16 September 2024 (03:20:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1117.v1

Hydration and Mechanical Properties of High-Volume Fly ash Cement under Different Curing Temperatures

Young-Cheol Choi

Subject: Engineering, Civil Engineering Keywords: curing temperature; high volume fly ash; hydration; compressive strength

Online: 15 September 2024 (07:32:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1140.v1

New Design Scheme and Application of Fresnel Lens for Broadband Photonics Terahertz Communication

Peng Tian, Yang Han, Weipin Li, XiongWei Yang, MingXu Wang, Jianjun Yu

Subject: Engineering, Telecommunications Keywords: terahertz wireless transmission; plano-convex lens; Fresnel lens; PTFE

Online: 14 September 2024 (11:37:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1059.v1

Thermal Bed Design for Temperature-Controlled DNA Amplification Using Optoelectronic Sensors

Guillermo Garcia-Torales, H. Torres-Ortega, Ruben Estrada-Marmolejo, Anuar B. Beltran-Gonzalez, Marija Strojnik

Subject: Engineering, Bioengineering Keywords: LAMP; DNA amplification; microfluidics; thermal control; optoelectronic sensors

Online: 14 September 2024 (10:11:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1062.v1

Multi-Material Topology Optimization on Separate Tetrahedral Meshes with Explicit Design Resolution by means of Remeshing

Robert Renz, Albert Albers

Subject: Engineering, Mechanical Engineering Keywords: multi-material; topology optimization; level set; remeshing; mesh adaption

Online: 14 September 2024 (10:06:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1091.v1

Multi-UAV Escape Target Search: A Multi-Agent Reinforce-ment Learning Method

Guang Liao, Jian Wang, Dujia Yang, Junan Yang

Subject: Engineering, Transportation Science And Technology Keywords: multi-UAV; area coverage path planning; escape target search; Multi-Agent Reinforcement Learning

Online: 14 September 2024 (07:40:18 CEST)

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Preprint ESSAY | doi:10.20944/preprints202409.1099.v1

Analyses and Comparison of PO Based Fuzzy Logic Controlled Mppt and the Incremental Conductance Mppt Algorithms in Photovoltaic Systems

Fevzi Çakmak, Zafer Aydoğmuş, Mehmet Rıda Tür

Subject: Engineering, Electrical And Electronic Engineering Keywords: boost converter; fuzzy logic algorithm; incremental conductivity algorithm; maximum power point trackers; photovoltaic systems

Online: 14 September 2024 (04:52:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1100.v1

Wood in Modern Construction: A Scientometric Examination of Sustainable Trends

Dorin Maier

Subject: Engineering, Civil Engineering Keywords: wood construction; building materials; circular economy; mass timber; cross laminated timber; sustainable development

Online: 14 September 2024 (04:46:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1022.v1

Environmental Impact Minimization Model for Storage Yard of In-Situ Produced PC Components: Comparison of Dung Beetle Algorithm and Improved Dung Beetle Algorithm

Jeeyoung Lim, Sunkuk Kim

Subject: Engineering, Civil Engineering Keywords: large logistics center; layout optimization; carbon dioxide emission; dung beetle optimization algorithm; improved dung beetle optimization algorithm

Online: 14 September 2024 (04:29:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1083.v1

Integrating YOLOv5, Jetson Nano, and Mitsubishi Manipulator for Real-time Machine Vision Application in Manufacturing

Ardian Webi Kirda, Paweł Majewski, Gerard Bursy, Marian Bartoszuk, Hayati Yassin, Grzegorz Krolczyk, Nur Arifin Akbar, Wahyu Caesarendra

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: automated chamfering and grinding; deep learning; intelligent manufacturing and remanufacturing; machine vision; robotic manufacturing

Online: 13 September 2024 (11:50:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1048.v1

Sustainable Consensus Algorithms Applied to Blockchain: A Systematic Literature Review

Magda Pineda, Daladier Jabba, Wilson Nieto-Bernal, Alfredo Pérez

Subject: Engineering, Other Keywords: Blockchain; consensus algorithms; sustainability; environmental footprint; systematic mapping

Online: 13 September 2024 (11:38:41 CEST)

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In recent years, consensus algorithms have gained significant importance in the context of blockchain networks. These algorithms play a crucial role in allowing network participants to reach agreements on the state of the Blockchain without needing a central authority. The present study focuses on carrying out a systematic mapping of these consensus algorithms to explore in detail their use, benefits, and challenges in the context of blockchain networks. Understanding consensus algorithms is essential to appreciating how blockchain networks achieve the reliability and integrity of their distributed ledgers. These algorithms allow network nodes to reach agreement on the validity of transactions and the creation of new blocks on the Blockchain. In this sense, consensus algorithms are the engine that drives trust in these decentralized networks. Numerous authors have contributed to the development and understanding of consensus algorithms in the context of blockchain networks. For example, Satoshi Nakamoto's (2008) original paper on Bitcoin introduced proof-of-work (PoW) as a method of achieving consensus on the network. This revolutionary concept paved the way for numerous cryptocurrencies and blockchain systems. Despite advances in this field, significant challenges remain: centralization, fair token distribution, scalability, and sustainability. The energy consumption of blockchain networks, particularly those using algorithms such as Proof of Work, Proof of Stake, Delegated Proof of Stake, Proof of Authority, and hybrid algorithms (Proof of Work/Proof of Stake), has raised concerns about their environmental impact, motivating the scientific and technological community to investigate more sustainable alternatives that promise to reduce energy consumption and contribute to climate change mitigation. Furthermore, interoperability between different blockchains and security in specific environments, such as IoT, are areas that still require significant research attention. This systematic mapping not only seeks to shed light on the current state of consensus algorithms in blockchain, but also their impact on sustainability, identifying those algorithms that, in addition to guaranteeing integrity and security, minimize the environmental footprint, promoting a more efficient use of energy resources, being a relevant approach in a context in which the adoption of sustainable technologies has become a global priority. Understanding and improving these algorithms are critical to unlocking the full potential of blockchain technology in a variety of applications and industry sectors.

Preprint ARTICLE | doi:10.20944/preprints202409.1075.v1

Robust and Accurate Recognition of Carriage Linear Array Images for Train Fault Detection

Zhenzhou Fu, Xiao Pan

Subject: Engineering, Transportation Science And Technology Keywords: High-resolution image recognition; point set registration; weighted radial basis function; non-linear scale distortion; gaussian mixture model

Online: 13 September 2024 (10:41:07 CEST)

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Train fault detection primarily relies on the comparative analysis of collected images with standard reference images, making the accurate identification of the collected image types crucial for effective fault detection. Most current systems achieve indirect classification of carriage images by using Automatic Equipment Identification (AEI) devices to recognize carriage identification number information while capturing the carriage images. However, damaged RF tags or blurred characters can hinder these devices, obstructing further train fault analyses. The unique features of carriage linear array images, such as high resolution, extreme aspect ratios, and local non-linear distortions, pose significant challenges to recognition algorithms. This paper proposes a method specifically designed to recognize these types of images. First, we implement an object detection algorithm to locate the positions of key components in carriage linear array images. By leveraging the spatial layout mapping between these key components and the carriage type classification, we simplify the complex image recognition problem into a sparse point set alignment task. To ensure effective registration despite local distortions in the linear array images, we propose a weighted radial basis function. To address the issues of unknown matching relationships and quantity mismatches during point set alignment, the proposed objective function is designed to maximize the similarity between Gaussian mixtures of point sets, thereby determining the RBF weights. Extensive experiments have demonstrated that our algorithm achieves 100% recognition accuracy under local nonlinear scale distortions of less than 15%. The algorithm remains effective even in the presence of some false positives or missed detections in key component object detection results. It can accurately identify the target category from 79 image categories within 24 milliseconds on an i7 CPU without GPU support. It is of great significance to reduce system cost and promote automatic exterior fault detection for train rolling stock.

Preprint ARTICLE | doi:10.20944/preprints202409.1035.v1

IoHT and Edge Computing Aided Pandemic-Compliant, Resilient and Perceptive Platform for Smart-City Human Habitat

Atlanta Choudhury ---, Kandarpa Kumar Sarma, Debashis Dev Misra, Koushik Guha, Jacopo Iannacci

Subject: Engineering, Electrical And Electronic Engineering Keywords: deep learning; deep transfer learning; contact tracing; facemask; social distancing; edge computing; cyber-attack; Federated Learning

Online: 13 September 2024 (08:40:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1054.v1

Direct Current To Digital Converter (DCDC): A Current Sensor

Saeid Karimpour, Michael Sekyere, Isaac Bruce, Emmanuel Nti Darko, Degang Chen, Colin C. McAndrew, Doug Garrity, Xiankun Jin, Ilhan Hatirnaz, Chen He

Subject: Engineering, Electrical And Electronic Engineering Keywords: reliability; measurement; ADC; DCDC; CMOS; VLSI; SAR

Online: 13 September 2024 (08:25:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1055.v1

Research on Bearing Fault Diagnosis Methods Based on Various Convolutional Neural Network Architectures

Mingshen Xu

Subject: Engineering, Electrical And Electronic Engineering Keywords: bearing fault diagnosis; ; convolutional neural network; ; feature extraction; ; multi-directional convolution; ; multi-scale convolution

Online: 13 September 2024 (07:11:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0949.v1

Analysis of Error-Based Switched Fractional Order Adaptive Systems: An Error Model Approach

Norelys Aguila-Camacho, Javier A. Gallegos, YangQuan Chen, Juan C. Travieso-Torres

Subject: Engineering, Control And Systems Engineering Keywords: fractional calculus; switched fractional order adaptive systems; switched fractional order error models

Online: 13 September 2024 (04:19:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0939.v1

Digital Transformation in University Architecture: Building Data Management on the Pontificia Universidad Javeriana Campus

Daniela Carrasco-Beltrán, Alejandro Serrano-Sierra, Roberto Cuervo Pulido, Carolina Valbuena-Bermúdez, Jaime A. Pavlich-Mariscal, César Granados-León

Subject: Engineering, Architecture, Building And Construction Keywords: Digital Technologies; Community impact; Construction Processes; Information Management; Interactive Tools; Interdisciplinarity; Sustainability

Online: 13 September 2024 (04:14:31 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1029.v1

Foot-Floor Contact Sequences: A Metric for Gait Assessment in Parkinson’s Disease after Deep Brain Stimulation

Marco Ghislieri, Valentina Agostini, Laura Rizzi, Chiara Fronda, Marco Knaflitz, Michele Lanotte

Subject: Engineering, Bioengineering Keywords: DBS; foot-floor contact; gait analysis; locomotion; PD

Online: 13 September 2024 (03:02:24 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.0974.v1

Wood-Cement Composites: A Sustainable Approach for Mitigating Environmental Impact in Construction

Dorin Maier, Daniela Lucia Manea, Roxana Tamas-Gavrea, Tiriac Alexandra, Paul Costin

Subject: Engineering, Civil Engineering Keywords: wood; cement; wood waste,; wood-cement composites; building materials; green constructions

Online: 12 September 2024 (15:49:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0932.v1

Assessing Passenger Risks and Impact Incidents at the Platform-Train Interface: Insights from Valparaíso Metro

Sebastian Seriani, Vicente Aprigliano, Catalina Toro, Gonzalo Rojas, Kamalasudhan Achuthan

Subject: Engineering, Transportation Science And Technology Keywords: passengers; risks; incidents; metro station; platform train interface; Valparaíso; Chile

Online: 12 September 2024 (15:48:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0929.v1

Jaya-Based Optimization of Active Elements for Hybrid Relay-Reflecting Intelligent Surface-Assisted Secrecy Wireless Communications

Abdulrahman Al Ayidh

Subject: Engineering, Telecommunications Keywords: Hybrid Relay-Reflecting Intelligent Surface; secrecy communication system; Jaya optimization technique

Online: 12 September 2024 (15:30:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1009.v1

The Flight Test Results of Altitude Stabilization System Dedicated for the Wing-in-Ground UAV

Marcin Chodnicki, Krzysztof Falkowski, Norbert Sigiel

Subject: Engineering, Aerospace Engineering Keywords: eyword; autopilot; wing-in-ground (WIG); control system; drones; flight tests; UAV; RPAS; autonomous robots; autonomous systems; linear systems; switched systems

Online: 12 September 2024 (13:10:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0919.v1

Multiphysics Studies of 3D Plate Fin Heat Exchanger Filled with Ortho-Para- Hydrogen Conversion Catalyst for Hydrogen Liquefaction

Liangguang Tang, Doki Yamaguchi, Jose Orellana, Wendy Tian

Subject: Engineering, Chemical Engineering Keywords: plate fin heat exchanger; ortho-para- hydrogen conversion; Multiphysics modelling; hydrogen liquefaction

Online: 12 September 2024 (11:29:11 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.0946.v1

A Review of Plasma Chemical Surface Treatment on Parylene for Deposition on Ionic Polymers

SHARA KHURSHEED, Dr. Khawaja Moeed, Dr. Zain Khan

Subject: Engineering, Mechanical Engineering Keywords: Nafion117; actuators; parylene; plasma

Online: 12 September 2024 (11:09:08 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.0886.v1

A Survey of the Routing Problem for Cooperated Trucks and Drones

Shuo Dang, Yao Liu, Zhihao Luo, Zhong Liu, Jianmai Shi

Subject: Engineering, Transportation Science And Technology Keywords: Drones; Trucks; Vehicle routing problem; Survey

Online: 12 September 2024 (11:03:26 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0927.v1

Enhancing Strength and Performance of Self-Compacting Concrete for Integration in Department of Public Works and Highways Projects: A Value Engineering Approach

John Philip Rivera

Subject: Engineering, Civil Engineering Keywords: Self-Compacting Concrete; Department of Public Works and Highways; Strength Enhancement; Durability Optimization; Construction Efficiency

Online: 12 September 2024 (10:51:25 CEST)

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