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Performance of vehicle direction behavior on turning conditions by adding braking force proportion control

AIP Conference Proceedings 2024年第1期3053卷

作者： I. Ketut Adi Atmika I. Gusti Agung Kade Suriadi Mechanical Engineering Department of Udayana University Street of Bukit Jimbaran Bali 80361 Indonesia Technology and Material Research Center of Udayana University Street of Bukit Jimbaran Bali 80361 Indonesia Doctoral Program of Engineering Science Engineering Faculty of Udayana University Street of PB Sudirman Bali 80114 Indonesia

The performance of vehicle direction stability both on straight roads and turning roads is one of the important aspects to be considered in designing automotive products as a whole. In straight road conditions, an antilock brake system has been developed or better known as the Antilock Breaking System (ABS), but in turning conditions, the standard ABS performance is less than optimal to overcome oversteer or understeer vehicle conditions. The less optimal performance of vehicle direction stability is due to the magnitude of the braking force of each wheel is still the same while in turning conditions the braking force requirements of each wheel are not the same. One strategy to overcome these weaknesses is to control the proportion of braking force on each wheel. The research was conducted by formulating the physical model of the system into a mathematical model, then simulating it with a Simulink matlab. The braking force proportion control system model, and the vehicle model are made completely, then integrated into the vehicle direction stability performance plant/system. The simulation results show that at a fairly high speed of 80 km/hour the braking system with control of the proportion of braking force is still quite good, while the standard ABS at speeds above 60 km/hour tends to oversteer.

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Effect of recycling agents on the homogeneity of high RAP binders 2

Effect of recycling agents on the homogeneity of high RAP bi...

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2nd International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2020

作者： Abdelaziz, A. Martin, A. Epps Masad, E. Arámbula-Mercado, E. Kaseer, F. Zachry Department of Civil and Environmental Engineering Texas A&M University TX United States Mechanical Engineering Program Texas A&M University at Qatar Doha Qatar Texas A&M Transportation Institute TX United States Florida Department of Transportation State Materials Office GainesvilleFL United States

ISBN: (纸本)9780367461690

Increased costs of virgin asphalt pavement materials have encouraged transportation agencies to allow higher quantities of reclaimed asphalt pavement (RAP) in their recycled asphalt mix design if performance can be maintained. Recycling agents or rejuvenators are organic materials used to reduce the stiffness and brittleness of RAP binders and make recycled mixtures less prone to cracking. Recycling agents can facilitate the use of higher quantities of RAP;however, there is limited understanding on their effect on the homogeneity of the final blend of virgin and recycled binders and recycling agent. This study utilized Atomic Force Microscopy (AFM) to assess the effect of recycling agents on the homogeneity of different blends of virgin and RAP binders. AFM results revealed that the addition of recycling agents improved the homogeneity of blends at unaged and short-term aging conditions;however, this effect diminished after long-term aging. © 2021 Taylor & Francis Group, London.

关键词： Binders

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Deep Potentials for Materials Science

arXiv

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arXiv 2022年

作者： Wen, Tongqi Zhang, Linfeng Wang, Han Weinan, E. Srolovitz, David J. Department of Mechanical Engineering The University of Hong Kong Hong Kong DP Technology Beijing China AI for Science Institute Beijing China Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Beijing China HEDPS CAPT College of Engineering Peking University Beijing China School of Mathematical Sciences Peking University Beijing China Department of Mathematics and Program in Applied and Computational Mathematics Princeton University Princeton United States Shenzhen China

To fill the gap between accurate (and expensive) ab initio calculations and efficient atomistic simulations based on empirical interatomic potentials, a new class of descriptions of atomic interactions has emerged and been widely applied;i.e., machine learning potentials (MLPs). One recently developed type of MLP is the Deep Potential (DP) method. In this review, we provide an introduction to DP methods in computational materials science. The theory underlying the DP method is presented along with a step-by-step introduction to their development and use. We also review materials applications of DPs in a wide range of materials systems. The DP Library provides a platform for the development of DPs and a database of extant DPs. We discuss the accuracy and efficiency of DPs compared with ab initio methods and empirical potentials. Copyright © 2022, The Authors. All rights reserved.

关键词： Calculations

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Deep Learning-Based Analysis of Glottal Attack and Offset Times in Adductor Laryngeal Dystonia

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Journal of Voice 2023年

作者： Yousef, Ahmed M. Deliyski, Dimitar D. Zayernouri, Mohsen Zacharias, Stephanie R.C. Naghibolhosseini, Maryam Department of Communicative Sciences and Disorders Michigan State University East Lansing MI United States Departments of Mechanical Engineering & Statistics and Probability Michigan State University East Lansing MI United States Head and Neck Regenerative Medicine Program Mayo Clinic Scottsdale Arizona United States Department of Otolaryngology—Head and Neck Surgery Mayo Clinic Phoenix Arizona United States

Objective: Diagnosis of adductor laryngeal dystonia (AdLD) is challenging as it mimics voice features of other voice disorders. This could lead to misdiagnosis (or delayed diagnosis) and ineffective treatments of AdLD. This paper develops automated measurements of glottal attack time (GAT) and glottal offset time (GOT) from high-speed videoendoscopy (HSV) in connected speech as objective measures that can potentially facilitate the diagnosis of this disorder in the future. Methods: HSV data were recorded from vocally normal adults and patients with AdLD during the reading of the “Rainbow Passage” and six CAPE-V (Consensus Auditory-Perceptual Evaluation of Voice) sentences. A deep learning framework was designed and trained to segment the glottal area and detect the vocal fold edges in the HSV dataset. This automated framework allowed us to automatically measure and quantify the GATs and GOTs for the participants. Accordingly, a comparison was held between the obtained measurements among vocally normal speakers and those with AdLD. Results: The automated framework was successfully developed and able to accurately segment the glottal area/edges. The precise automated measurements of GAT and GOT revealed minor, nonsignificant differences compared to the results of manual analysis—showing a strong correlation between the measures by the automated and manual methods. The results showed significant differences in the GAT values between the vocally normal subjects and AdLD patients, with larger variability in both the GAT and GOT measures in the AdLD group. Conclusions: The developed automated approach for GAT and GOT measurement can be valuable in clinical practice. These quantitative measurements can be used as meaningful biomarkers of the impaired vocal function in AdLD and help its differential diagnosis in the future. © 2023 The Voice Foundation

关键词： Adductor laryngeal dystonia Connected speech Deep learning Glottal attack/offset time High-speed videoendoscopy Laryngeal imaging

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Enhanced electrochemical detection of tartrazine in beverages and liquid soap via nickel phosphide-adorned functionalized carbon nanofibers

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Journal of the Taiwan Institute of Chemical Engineers 2024年 157卷

作者： Gokulkumar, Kumar Huang, Song-Jeng Kogularasu, Sakthivel Aljuwayid, Ahmed M. Maheshwaran, Selvarasu Govindasamy, Mani Department of Mechanical Engineering National Taiwan University of Science and Technology Taipei City106335 Taiwan Super micro mass research and technology center Cheng Shiu University Kaohsiung833301 Taiwan Center for Environmental Toxin and Emerging-Contaminant Research Cheng Shiu University Kaohsiung833301 Taiwan Department of Chemistry College of Science King Saud University P. O. Box 2455 Riyadh11451 Saudi Arabia Department of Aeronautics and Astronautics National Cheng Kung University Tainan701 Taiwan International Ph.D. Program In Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan Tamil Nadu Chennai602105 India

Background: Tartrazine (TAT) is a widely used food colorant dye, offering an orange-yellow hue in various products such as foods, cosmetics, and pharmaceuticals. Despite its popularity, TAT is banned in several countries due to its potential health risks, including respiratory issues, migraines, and skin allergies. Moreover, TAT is linked with adverse effects on human physiology, including mutagenicity, biliary cirrhosis, changes in liver and kidney functions, and neurodegeneration at varying doses. Consequently, the detection of this food additive is crucial for safeguarding human health and protecting aquatic organisms. Methods: In this study, a novel sensor was developed for the detection of TAT, utilizing a composite material made from nickel phosphide decorated with functionalized carbon nanofiber (Ni2P@f-CNF). The Ni2P@f-CNF was synthesized and characterized through several techniques, including X-ray diffraction, X-ray photoelectron spectroscopy, field emission-scanning electron microscopy, and elemental mapping. The composite was then integrated with a glassy carbon electrode to create a sensor. The sensor's performance was evaluated in terms of detection limit, linear range, selectivity, sensitivity, reproducibility, repeatability, and long-term stability. Main Findings: The developed Ni2P@f-CNF composite sensor displayed a lower detection limit of 0.011 µM and a broad linear range from 0.01 to 1875 µM. Its selectivity and sensitivity were exceptional, primarily due to the catalytic activity of the Ni2P@f-CNF composite towards TAT. The sensor also demonstrated excellent reproducibility, repeatability, and notable long-term stability. Importantly, when applied in real-world scenarios, the sensor successfully detected TAT in soft drink and liquid soap samples, yielding high recovery rates between 97.45 % to 99.37 % and 98.26 % to 99.01 %, respectively, underscoring its potential applicability in practical settings. © 2024 Taiwan Institute of Chemical Engineer

关键词： Nickel compounds

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Risk factors for bone cement dislodgement following balloon kyphoplasty for osteoporotic vertebral compression fracture

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Neurochirurgie 2024年第4期70卷 101559-101559页

作者： Chang, Kai-Chieh Huang, Chih-Ta Hsieh, Cheng-Ta Chen, Chien-Min Chang, Chih-Ju Division of Neurosurgery Department of Surgery Cathay General Hospital Taipei City Taiwan Ph.D. Program in Medical Neuroscience College of Medical Science and Technology Taipei Medical University and National Health Research Institutes Taipei 110 Taiwan Department of Biomedical Engineering Yuanpei University of Medical Technology Hsinchu Taiwan Department of Medicine School of Medicine Fu Jen Catholic University New Taipei City Taiwan School of Medicine National Tsing Hua University Hsinchu Taiwan Division of Neurosurgery Department of Surgery Changhua Christian Hospital Changhua Taiwan Department of Leisure Industry Management National Chin-Yi University of Technology Taichung Taiwan Department of Mechanical Engineering National Central University Taoyuan City Taiwan

Objective: The study aimed to determine the incidence and risk factors associated with bone cement dislodgement in patients with osteoporotic vertebral compression fracture following balloon kyphoplasty treatment. Methods: A retrospective study was conducted on 203 patients who underwent kyphoplasty in 255 vertebral bodies between January 2017 and December 2021. The patients were categorized into two groups: the bone cement dislodgment group (n = 16) and the non-bone cement dislodgement group (n = 239). Various patient characteristics and radiologic parameters were evaluated. Statistical analysis involved the assessment of the background homogeneity of the group by using independent sample t tests, chi-square tests, and Fisher's exact. Univariate and multivariate logistic regression analyses were performed to explore the impact of background variables on cement dislodgement. Results: The results revealed that split-type fracture (χ² = 31.706, p < 0.001), DISH (χ² = 18.827, p = 0.011), pedicle fracture (χ² = 22.246, p < 0.001), endplate deficit (χ² = 14.023, p < 0.001), posterior wall injury (χ² = 29.124, p < 0.001), and intervertebral vacuum cleft (χ² = 21.469, p < 0.001) were the factors that significantly differed between the two groups. The multivariate logistic regression analysis revealed posterior wall injury (OR = 12.983, p = 0.025) and intervertebral vacuum cleft (OR = 5.062, p = 0.024) to be independent risk factors. Conclusion: The incidence of bone cement dislodgement in our study was 6.3%. This study underscores the importance of using preoperative radiologic parameters to predict the risk of bone cement dislodgement following balloon kyphoplasty. © 2024 Elsevier Masson SAS

关键词： Balloon kyphoplasty Bone cement dislodgment Osteoporotic vertebral compression fracture

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Parallel mechanism-based robots for single and dual extrusion 3D printing

Parallel mechanism-based robots for single and dual extrusio...

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2019 Conference on Advances in robotics, AIR 2019

作者： Veerapur, Vinay Zemase, Shritej Tillu, Pranav Dwarakanath, T.A. Department of Mechanical Engineering Pillai College of Engineering New Panvel Navi Mumbai410206 India Division of Remote Handling and Robotics BARC Mumbai400085 India

ISBN: (纸本)9781450366502

This paper deals with the development of 3D printing machine using a parallel mechanism based robot. Discussed topics are the high motion resolution, high rigidity, high precision and workspace constraints of the parallel robot in 3D printing. The single extrusion is extended to dual extrusion 3D printing to accommodate very high adaptability in composite material 3D printing. This paper proposes intelligent algorithms based on mirror manipulation. Demonstration of prototype arrangement of dual extrusion 3D printing is done. © 2019 Association for Computing Machinery.

关键词： 3D printers

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Rapid and sensitive LAMP/CRISPR-powered diagnostics to detect different hepatitis C virus genotypes using an ITO-based EG-FET biosensing platform

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Sensors and Actuators B: Chemical 2023年第1期394卷

作者： Ho, Hsin-Ying Kao, Wei-Sin Deval, Piyush Dai, Chia-Yen Chen, Yen-Hsu Yu, Ming-Lung Lin, Che-Hsin Yu, Ling-Shan Institute of BioPharmaceutical Sciences College of Medicine National Sun Yat-sen University Kaohsiung Taiwan Department of Mechanical and Electro-Mechanical Engineering National Sun Yat-sen University Kaohsiung Taiwan Department of Internal Medicine Kaohsiung Medical University Hospital Kaohsiung Medical University Kaohsiung Taiwan Center of Excellence for Metabolic Associated Fatty Liver Disease National Sun Yat-sen University Kaohsiung Taiwan School of medicine College of Medicine National Sun Yat-sen University Kaohsiung Taiwan School of Medicine and Doctoral Program of Clinical and Experimental Medicine College of Medicine National Sun Yat-sen University Taiwan Kaohsiung Taiwan

The hepatitis C virus (HCV), a major causative agent of chronic liver disease, is responsible for the incidence of hepatitis infections worldwide. In line with the World Health Organization's goal of reducing global new infections by 90% and viral hepatitis-related mortality rates by 65% by 2030, we proposed a miniaturized indium tin oxide-based extended gate field-effect transistor biosensor for rapid and specific detection of different HCV genotypes within 20 min. The biosensor combined loop-mediated isothermal amplification (LAMP) and clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein 12 (CRISPR/Cas12a)-induced cleavage. The immobilized single-stranded DNA (ssDNA) served as a signal transmitter and underwent CRISPR/Cas12a trans-cleavage, which was triggered by specific nucleic acid pairing with complementary guide RNAs. This resulted in a significant change in the surface potential, which indicated the presence of HCV-viral RNA. The sensor demonstrated high sensitivity, with a detection limit as low as 1 genomic copy/reaction and a 10-fold increase in robustness for low concentration tests. The clinical results are consistent with those of the polymerase chain reaction. This research offered a rapid, sensitive, and digital diagnostic method for HCV viral infections, particularly suited for resource-limited settings, contributing to the elimination of hepatitis. © 2023

关键词： Diagnosis

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Preliminary study on Acoustical Characteristics of Sago Midrib Composite 5

Preliminary study on Acoustical Characteristics of Sago Midr...

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5th International Symposium on Material, Mechatronics and Energy 2018, ISMME 2018

作者： Kusno, Asniawaty Asriani, Sherly Kamil, Kusno Jamala, Nurul Department of Architecture Faculty of Engineering Hasanuddin University Indonesia Study Program of Architecture Engineering Faculty Khairun University Indonesia Mechanical Engineering Department Engineering Faculty Universitas Muslim Indonesia Indonesia

This research is a preliminary study on the use of sago midrib as an acoustic material. This study aims to determine the sago as acoustic material by measuring the absorption coefficient using (impedance tube method) of 100 Hz-1.6 KHz frequencies. The results of measurement were analyzed and compared with common acoustic material available on market as reference. From the measurement of the sago midrib composite, absorption coefficient has fluctuated from low to high frequencies as the absorption coefficient of reference material is found to be more stable. © Published under licence by IOP Publishing Ltd.

关键词： Acoustic impedance

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Dynamic Insights of Developing Functional Nanomaterials for Clean Energy and Microelectronics

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Microscopy and Microanalysis 2024年第SUPPLEMENT_1期30卷

作者： Yang, Judith C Hwang, Sooyeon Camino, Fernando Chemical and Petroleum Engineering Department University of Pittsburgh Pittsburgh PA United States Physics and Astronomy Department University of Pittsburgh Pittsburgh PA United States Center for Functional Nanomaterials Brookhaven National Lab Upton NY United States Materials Science and Engineering Program & Department of Mechanical Engineering State University of New York at Binghamton Binghamton NY United States

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