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IEEE Latin American robotics Symposium, LARS

作者： João Alberto Fabro Matheus Biscaya Gutierrez Fernando Henrique Ratusznei Caetano DAINF - Academic Department of Informatica PPGCA - Graduate Program on Applied Computing LASER-Laboratory for Advanced Robotics and Embedded Systems UTFPR - Federal University of Technology - Paraná Curitiba PR - Brazil Information Systems academic - UTFPR - Federal University of Technology - Paraná Curitiba PR - Brazil Computer Engineering academic - UTFPR - Federal University of Technology - Paraná Curitiba PR - Brazil

ISBN: (数字)9781665462808

ISBN: (纸本)9781665462815

In this paper, an approach to aid in introductory programming courses is presented, focused on students that had never had any contact with computer programming. The approach, that was introduced in a previous paper [3], presents programming concepts using icons and “flowcharts”, and a 3D robotics simulator (CoppeliaSim), that has free educational use. This time, a real version of the simulated robot, built using Arduino and cheap, easily obtainable electronic components, is also presented. The programs to control the robot are developed by graphically constructing flowcharts on the visual editor, and then following the execution of programs using the simulated (or real) robot, step by step. This graphic program editor is named “FluxProg”, and its 2nd version is now available online, with new features comprising variables, arithmetic and logic expressions, thus providing a complete programming environment.

关键词： Flowcharts Visualization Three-dimensional displays Conferences Education Electronic components Robots

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Effect of welding parameters on automated robotic arc welding process

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Materials Today: Proceedings 2020年 26卷 2363-2367页

作者： Aman Sharma Kamal Sharma Anas Islam Debanik Roy Department of Mechanical Engineering GLA University Mathura UP India Division of Remote Handling and Robotics BARC & Homi Bhabha National Institute Department of Atomic Energy Mumbai India

This research focuses on the parameters of robotic welding and robotic welding and creating a DT approach that includes specialized tests for detecting defects in weld tests inline layer-by-layer. Results found that the established weld bead probes were able to locate imperfections from the inspected sample surface at depths up to 6 mm with a thickness as high as 350 μm with the probe up to 6 mm. There are various types of joints, from which test results has been figured out. Manual welding and robotic welding and the correlation between the weld performance of both joints and the comparison of hardness, tensile and impact strength and their microstructure are required. The purpose is to research is comparing weld workpiece of mild steel and mechanical properties and failure mode. Three types of standard tests are performed on the standard samples of mild steel. Results have been obtained from the tests; tensile strength, impact strength and hardness have been measured. The truthfulness of welded joints depends on the microstructure and properties of the weld. Rapid heating, cooling and systemic changes at the local level cause significant changes spatial differences in composition, microstructure, and residual stress in the HAZ. Different physical processes that control welding processes , thus affecting the integrity of the welded structure, can cause severe material damage, resulting in loss of strength and durability, or even structural failure. Expert welding testing helps to make sure your products and processes are acceptable for use.

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Generation of spheroids using an aqueous two-phase system droplet microfluidic platform 24

Generation of spheroids using an aqueous two-phase system dr...

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24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2020

作者： Kieda, Jennifer Jeyhani, Morteza Navi, Maryam Chan, Katherine Tsai, Scott S.H. Graduate Program in Biomedical Engineering Ryerson University Toronto Canada Department of Mechanical and Industrial Engineering Ryerson University Toronto Canada Keenan Research Centre for Biomedical Science St. Michael's Hospital Toronto Canada -a Partnership Between Ryerson University St. Michael's Hospital Canada

ISBN: (纸本)9781733419017

Two-dimensional (2-D) cell culture platforms fail to mimic in vivo physiological functions, such as intercellular interactions [1], so a three-dimensional (3-D) cell structure platform is desired to facilitate physiological insights. We present a new droplet microfluidic platform for the generation of cancer cell spheroids by encapsulation and isolation of Caki-2 cancer cells in droplets based on the higher affinity of the cells to the droplet phase in an aqueous two-phase system (ATPS) droplet microfluidic device. © 2020 CBMS-0001

关键词： Cancer cells

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Analysis of sea-water treated laminated bamboo composite for structural application

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Nature Environment and Pollution Technology 2019年第1期18卷 307-312页

作者： Amatosa, Teodoro A. Loretero, Michael E. Santos, Romeo B. Giduquio, Marnie B. Engineering Graduate Program School of Engineering University of San Carlos Talamban Campus Cebu City6000 Philippines College of Engineering and Technology Northwest Samar State University Calbayog City Samar6710 Philippines Department of Mechanical Engineering University of San Carlos Talamban Campus Cebu City6000 Philippines

Green engineering is increasingly investigated as a possibility to treat organic green material for structural applications. Dendrocalamus asper bamboo culms as green engineering materials were processed to produce composite materials using epoxy resin from a natural treatment by soaking with an average of pH 7.6 level of sea-water. mechanical properties of proposed laminated bamboo composites (LBCs) have been assessed under loading conditions and standards. The study provides a comparison of the structural performance with different conventional timbers as avenue for application in engineering design and practices. Comparison of laminated bamboo with woods indicate that average value of 27.47 MPa and 52.59 MPa for compressive and bending strength respectively, obtained much higher allowable value and average strength, which are comparable to stiffness values of softwoods and hardwoods. However, even though the present study shows properties with higher and comparable to other composite materials, further research must be given better attention for characterization and standardization before acceptance in the marketplace as alternative green engineering material to timber and wood-based composites and other building materials for construction design, and structural elements as composite materials for engineering utilization. © 2019 Technoscience Publications. All Rights Reserved.

关键词： Epoxy resins

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Application of Emerging Innovations in Microbiome Science to Space Development and Settlement Systems 73

Application of Emerging Innovations in Microbiome Science to...

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73rd International Astronautical Congress, IAC 2022

作者： Nastasi, Nicholas Anderson, Matthew Z. Balasubrahmaniam, Neeraja Bope, Ashleigh Britt, Rodney D. Cochran, Samuel J. Gill, Samuel J. Hegarty, Bridget Lee, Jiyoung Stamps, Blake W. Stickney, Amanda Taylor, Christopher G. Tram, Nguyen K. Van Dusen, John Varaljay, Vanessa A. Weir, Mark H. Horack, John M. Oglesbee, Michael Sullivan, Matthew B. Dannemiller, Karen C. Department of Civil Environmental & Geodetic Engineering Ohio State University ColumbusOH United States Division of Environmental Health Sciences College of Public Health Ohio State University ColumbusOH United States Environmental Sciences Graduate Program Ohio State University ColumbusOH United States Department of Microbiology College of Arts and Sciences Ohio State University ColumbusOH United States Department of Microbial Infection and Immunity Ohio State University ColumbusOH United States Center for Perinatal Research The Abigail Wexner Research Institute Nationwide Children's Hospital Department of Pediatrics Ohio State University ColumbusOH United States Department of Civil and Environmental Engineering Case School of Engineering Case Western Reserve University ClevelandOH United States Department of Food Science and Technology Ohio State University ColumbusOH United States Infectious Diseases Institute Ohio State University ColumbusOH United States Soft Matter Materials Branch Materials and Manufacturing Directorate Air Force Research Laboratory Wright - Patterson AFBOH United States Department of Plant Pathology College of Food Agriculture and Environmental Science Ohio State University ColumbusOH United States Department of Anesthesiology & Pain Medicine Nationwide Children's Hospital ColumbusOH United States Airman Systems Directorate 711th Human Performance Wing Air Force Research Laboratory WPAFBOH United States Sustainability Institute Ohio State University ColumbusOH United States Department of Mechanical and Aerospace Engineering College of Engineering John Glenn College of Public Affairs Ohio State University ColumbusOH United States Department of Veterinary Biosciences College of Veterinary Medicine Ohio State University ColumbusOH United States Center of Microbiome Science Ohio State University ColumbusOH United States

Future human spaceflight beyond low-Earth orbit will bring substantial changes and new requirements to the development of fully sustainable, healthy indoor human environments across a range of gravitational, radiative, and thermal conditions. One key aspect is understanding (and potentially leveraging) microorganisms that must coexist with humans, plants, and animals in enclosed habitats (their microbiota or microbiomes). Modern, genome-resolved microbiome science provides an opportunity to better understand how we can utilize microbes to optimize space missions and protect human health and well-being long-term. Microorganisms will be critical to mission success due to their direct or indirect interactions with 1) humans, 2) other living systems (e.g., plant and animal life as a food source and for experimentation), and 3) the built environment. For example, the human gut microbiome is a complex community that has important implications for human health and performance that include mental health, nutrition intake, and immune system function. The health of plant microbiomes is also critical for sustainable, dependable, and nutritious food production. Humans, plants, and other living systems (e.g., animals used in experimentation) will also shed microbes into the built environment, which may impact human exposure, plant health, system integrity, and planetary protection from microbial contamination in both forward and reverse directions. Microbes from all three systems will interact, resulting in potentially important 'non-linear' system implications that must be understood for the overall long-term sustainability of hardware, crew, and other living systems. This paper discusses recent advances in technology that expand measurement capabilities to ultra-low-biomass samples and now allow for better understanding of microbial taxa, community structure and drivers, and functional capacity, which together will empower microbiome-optimized deep-space human exploration miss

关键词： Bacteria

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clotFoam: An Open-Source Framework to Simulate Blood Clot Formation Under Arterial Flow

arXiv

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arXiv 2023年

作者： Montgomery, David Municchi, Federico Leiderman, Karin Department of Applied Mathematics and Statistics Colorado School of Mines 1500 Illinois St GoldenCO80401 United States Department of Mechanical Engineering Colorado School of Mines 1500 Illinois St GoldenCO80401 United States Department of Mathematics University of North Carolina at Chapel Hill 216 Lenoir Dr Chapel HillNC27599 United States Computational Medicine Program University of North Carolina at Chapel Hill 216 Lenoir Dr Chapel HillNC27599 United States

Blood clotting involves the coupled processes of platelet aggregation and coagulation. Simulating clotting under flow in complex geometries is challenging due to multiple temporal and spatial scales and high computational cost. clotFoam is an open-source software developed in OpenFOAM that employs a continuum model of platelet advection, diffusion, and aggregation in a dynamic fluid environment and a simplified coagulation model with proteins that advect, diffuse, and react within the fluid and with wall-bound species through reactive boundary conditions. Our framework provides the foundation on which one can build more complex models and perform reliable simulations in almost any computational domain. © 2023, CC BY.

关键词： Coagulation

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Anisotropic properties of 3-D printed Poly Lactic Acid (PLA) and Acrylonitrile Butadiene Styrene (ABS) plastics

Results in Materials

引用

Results in Materials 2021年 12卷

作者： Grant, Aneurin Regez, Bradley Kocak, Salih Huber, Joshua D. Mooers, Adam Construction Management Program University of West Florida Pensacola FL United States Department of Mechanical Engineering University of West Florida United States Huber Engineering LLC United States University of West Florida United States

Research was conducted on the mechanical and anisotropic properties of 3-D printed plastics (PLA and ABS), and the prevailing orientation and deposition of additive layers. Samples were tested in accordance with ASTM D638 - Standard Test Method for Tensile Properties of Plastics. Five print orientations were tested, including 0°, 30°, 45°, 60°, and 90°. Six samples were tested in each orientation, with a total of 30 samples being tested in each iteration of the experiment. An initial, “proof of concept” iteration was conducted with PLA plastic, followed by a second iteration which tested both PLA and ABS. Testing was conducted and based on the hypothesis that the material printed in the 0° orientation (parallel to the direction of applied tension) would be stronger, and that the strength of test specimens would be largely dependent on orientation of the material. In contrast, it was believed that the strength of 90° samples (perpendicular to the direction of applied tension) would be largely dependent on the strength of the bonds formed during the layer by layer deposition of heated material, and comparatively weaker. This was largely proven during testing. Samples printed in the 0° orientation exhibited statistically higher properties of both stress and strain. Conversely, plastics printed in the 90° orientation exhibited statistically weaker properties. It was noted that samples printed in the 30°, 45°, and 60° orientations exhibited some measure of improved ductility, although this was not the focus of the study. © 2021 The Authors

关键词： 3-Printing Additive manufacturing Anisotropy Plastics Strength Stress-strain

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Superelasticity in shape memory alloys via peridynamics 6

Superelasticity in shape memory alloys via peridynamics

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6th ECCOMAS European Conference on Computational Mechanics: Solids, Structures and Coupled Problems, ECCM 2018 and 7th ECCOMAS European Conference on Computational Fluid Dynamics, ECFD 2018

作者： Martowicz, Adam Bryla, Jakub Staszewski, Wieslaw J. Ruzzene, Massimo AGH University of Science and Technology Department of Robotics and Mechatronics al. A. Mickiewicza 30 Krakow30-059 Poland Georgia Institute of Technology School of Aerospace Engineering 270 Ferst Drive AtlantaGA30332 United States Georgia Institute of Technology School of Mechanical Engineering 801 Ferst Drive AtlantaGA30332 United States

ISBN: (纸本)9788494731167

The work is devoted to modeling the phenomenon of superelasticity, that is present in shape memory alloys (SMA), making use of peridynamics. SMA are a type of smart materials, in which solid phase transformations can be activated either by temperature change or external load. As found in the literature, there are known attempts at simulations of phase transformations in SMA introducing the above-mentioned nonlocal modeling technique. The superelasticity specifically refers to reversible phase changes, i.e. austenite-martensite-austenite, observed in SMA due to cyclic external force loading and unloading. As a consequence, the strain-stress characteristics exhibit hysteretic behavior. However, no temperature variation is needed for superelasticity to initiate phase transformations, as it applies in case of both one- and two-way shape memory effects. Having introduced a peridynamic model for a solid body made of SMA, quasi-static numerical calculations are performed to build a stress-strain characteristics. The reference for the obtained results is provided with the outcomes from finite element analyses. The modelling capabilities of peridynamics for SMA are discussed. copyright © Crown copyright (2018).All right reserved.

关键词： Unloading

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Performance of solar panels as electricity source to burn rice powder in the biomass gasification process

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AIP Conference Proceedings 2023年第1期2828卷

作者： Suliono Dedi Suwandi Muhammad Luthfi Felix Dionisius Dori Yuvenda Mechanical Engineering Study Program Indramayu State Polytechnic. Legok Indramayu District West Java 4525 Indonesia Department of Automotive Engineering Faculty of engineering Universitas Negeri Padang. Campus UNP Air Tawar West Padang 25171 Indonesia

Currently, energy needs are one of the sources of human life that cannot be separated. Energy can be classified into two, energy sourced from fossils of living things and plants, with high rice production, making gasification tools an alternative to the use of rice husks into energy. Gasification is a thermochemical process of converting solid fuels into gas thus gasification using this resource is itself a renewable energy. This research is experimental. The air flow rate valve is set at speed = 2.2 m/s for the glowplug variation 3, 2.5m/s for the glowplug variation 4, 2.6m/s for the glowplug variation 5, 2.9 m/s for the glowplug variation 6 with Air Fuel Ratio (AFR)) 0.7%, 0.8%, 0.9%, 1%. With the glowplug variation, the highest temperature is up to 888°C with 1% AFR.

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Virtual Experiments on ArUco and AprilTag Systems Comparison for Fiducial Marker Rotation Resistance under Noisy Sensory Data

Virtual Experiments on ArUco and AprilTag Systems Comparison...

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International Joint Conference on Neural Networks (IJCNN)

作者： Aufar Zakiev Tatyana Tsoy Ksenia Shabalina Evgeni Magid Subir Kumar Saha Intelligent Robotics Department Kazan Federal University Kazan Russian Federation Department of Mechanical Engineering Indian Institute of Technology Delhi Delhi India

ISBN: (数字)9781728169262

ISBN: (纸本)9781728169279

Modern robotic researches propose various machine vision methods for accomplishing robotic tasks. The recognition quality in these tasks is very important for successful performance. A large number of them use fiducial marker systems as a main element of algorithms. However, only a few researches are comparing standard marker systems. This paper is dedicated to the comparison of AprilTag and ArUco markers resistance to rotations in the presence of synthetic noise. Experiments were conducted in ROS/Gazebo virtual environment in order to provide a fair comparison of marker detection and recognition algorithms while eliminating external environment conditions that influence the algorithms' performance. The presented virtual environments allow collecting a significant amount of data by experiment process automation. Different levels of additive white Gaussian noise were applied to input sensory data in order to simulate the imperfection of real digital cameras. The main contribution of the paper is the systematic comparison of AprilTag and ArUco markers for rotation resistance in the presence of optical sensor noise.

关键词： Robot sensing systems Cameras Noise level Reliability Immune system Virtual environments

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