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Accurate prediction of oxygen vacancy concentration with disordered A-site cations in high-entropy perovskite oxides

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npj Computational Materials 2023年第1期9卷 2053-2065页

作者： Jiyun Park Boyuan Xu Jie Pan Dawei Zhang Stephan Lany Xingbo Liu Jian Luo Yue Qi School of Engineering Brown UniversityProvidenceRI 02912USA Department of Physics Brown UniversityProvidenceRI 02912USA Department of Chemical Engineering and Materials Science Michigan State UniversityEast LansingMI 48824USA Program of Materials Science and Engineering University of California San DiegoLa JollaCA 92093USA Materials Science Center National Renewable Energy LaboratoryGoldenCO 80401USA Department of Mechanical and Aerospace Engineering Benjamin M.Statler College of Engineering and Mineral ResourcesWest Virginia UniversityMorgantownWV 26506USA Department of NanoEngineering University of California San DiegoLa JollaCA 92093USA

Entropic stabilized ABO_(3) perovskite oxides promise many applications,including the two-step solar thermochemical hydrogen(STCH)*** binary and quaternary A-site mixed{A}FeO_(3) as a model system,we reveal that as more cation types,especially above four,are mixed on the A-site,the cell lattice becomes more cubic-like but the local Fe–O octahedrons are more *** comparing four different Density Functional Theory-informed statistical models with experiments,we show that the oxygen vacancy formation energies(E^(f)_(V))distribution and the vacancy interactions must be considered to predict the oxygen non-stoichiometry(δ)*** STCH applications,the E^(f)_(V) distribution,including both the average and the spread,can be optimized jointly to improveΔδ(difference ofδbetween the two-step conditions)in some hydrogen production *** model can be used to predict the range of water splitting that can be thermodynamically improved by mixing cations in{A}FeO_(3) perovskites.

关键词： perovskite vacancy oxides

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Enhancing Agricultural Efficiency and Sustainability Through Smart Direct Couple Motor Operated Valve: A Technological Innovation for Automated Irrigation and Fertilization

SSRN

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SSRN 2024年

作者： Nugraha, Muhamad Hanhan Hanhan Rabbika, Anes Inda Rusdja, Andy Permana Bustomi, Ahmad Mechanical Engineering Study Program Mechanical Engineering Department State Polytechnic of Jakarta Depok16425 Indonesia Manufacturing Engineering Technology Study Program Mechanical Engineering Department State Polytechnic of Jakarta Depok16425 Indonesia Mechanical Engineering Study Program Faculty of Engineering Mayasari Bakti University Tasikmalaya46196 Indonesia

This research introduces the Smart Direct Couple Motor Operated Valve (SDCMOV), designed to enhance agricultural efficiency and sustainability. SDCMOV automates the distribution of water and fertilizers in vegetable farming, reducing labor intensity and inefficiencies. The system addresses key issues such as minimizing musculoskeletal disorders (MSDs) among farmers and ensuring consistent nutrient delivery for optimal plant growth. Energy-efficient, environmentally friendly, and remotely controllable via mobile devices, SDCMOV significantly improves irrigation and fertilization processes. Experimental results suggest that SDCMOV is a viable solution for sustainable and modern agricultural practices, particularly in developing countries. © 2024, The Authors. All rights reserved.

关键词： Irrigation

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A Convex Formulation of the Soft-Capture Problem

A Convex Formulation of the Soft-Capture Problem

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Space robotics (iSpaRo), International Conference on

作者： Ibrahima Sory Sow Geordan Gutow Howie Choset Zachary Manchester Department of Mechanical Engineering Robotics Institute Carnegie Mellon University Pittsburgh PA

ISBN: (数字)9798350367232

ISBN: (纸本)9798350367249

We present a fast trajectory optimization algorithm for the soft capture of uncooperative tumbling space objects. Our algorithm generates safe, dynamically feasible, and minimum-fuel trajectories for a six-degree-of-freedom servicing spacecraft to achieve soft capture (near-zero relative velocity at contact) between predefined locations on the servicer spacecraft and target body. We solve a convex problem by enforcing a convex relaxation of the field-of-view constraint, followed by a sequential convex program correcting the trajectory for collision avoidance. The optimization problems can be solved with a standard second-order cone programming solver, making the algorithm both fast and practical for implementation in flight software. We demonstrate the performance and robustness of our algorithm in simulation over a range of object tumble rates up to 10°/s.

关键词： Space vehicles Heuristic algorithms Software algorithms programming Software Robustness Collision avoidance

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Long-term monitoring of indoor carbon monoxide levels in disproportionately impacted neighborhoods in Denver 18

Long-term monitoring of indoor carbon monoxide levels in dis...

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18th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2024

作者： Sankhyan, Sumit Hollo, Aniya K. Gonzalez-Beltran, Dulce Clements, Nicholas Miller, Shelly L. Paul M. Rady Department of Mechanical Engineering University of Colorado Boulder 1111 Engineering Drive BoulderCO80309 United States Environmental Engineering Program University of Colorado Boulder 4001 Discovery Drive BoulderCO80302 United States

ISBN: (纸本)9798331306816

In this study we monitored indoor carbon monoxide (CO) levels for ~50 homes over two seasons in the Denver metropolitan area as part of the Social, Justice, and Environmental Quality-Denver initiative (SJEQ-D). These homes were chosen from disproportionately impacted neighborhoods and were impacted by a major freeway construction upgrade in close proximity to these neighborhoods. The results from the suggest that ~10% of the homes in each cohort had consistently low levels of CO (daily averaged values above 3.5 ppm) and ~20% of the homes also consistently showed episodic peaks above 9 ppm throughout this yearlong study spanning three different seasons. The results from this study underline the need for increasing awareness regarding the prevalence of low levels of CO exposures at homes since concentration at these levels could impact the overall health of residents especially pregnant women and sensitive populations. © 2024 18th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2024 - Conference program and Proceedings. All rights reserved.

关键词： Indoor air pollution

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Risk Allocation Preferences in Indonesian Electricity Public-Private Partnership Projects: A Conjoint Analysis

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IEEE engineering Management Review 2021年第3期49卷 154-174页

作者： Hartono, Budi Ghifari, M. Dzaki Agung Dianita, Orchida Industrial Engineering Program Mechanical and Industrial Engineering Department Faculty of Engineering Universitas Gadjah Mada Yogyakarta5528 Indonesia

This article investigates the risk allocation preferences of Indonesian government agents within a public-private partnership scheme in electricity infrastructure projects. A full-factorial conjoint analysis is employed by introducing three groups of risk factors, namely, 'Policy,' 'Legal,' and 'Project residual' risks, to form eight distinctive scenarios. A total of 37 respondents from a government agency and other public agencies participated in the experiment, and two distinct clusters within a single party (public entity/government) emerged. The two clusters agree on the order of importance of risk preferences but disagree on nearly everything else. The clusters diverge in the magnitude of risk importance, risk preference scores, profiles, and the most preferred scenarios. This article also determines that the risk preference profiles of both clusters do not consistently follow the optimum risk-sharing principles. Moreover, this article elaborates on the scientific contributions and practical implications of the findings. Results provide essential insights into the risk allocation preferences of the public agents. The findings contribute to the development of mutual understanding between the public and private entities. © 1973-2011 IEEE.

关键词： Risk perception

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Application of a Self-Assembly Sensing Layer to Grating Sensor Cabinets for Biomedical Sensing of Rheumatoid Arthritis Antigen-Antibodies

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IEEE Sensors Journal 2024年第7期24卷 10039-10047页

作者： Wen, Hsin-Yi Hsu, Hsiang-Cheng Feng, Wen-Kai Jhan, Kai-Siang Yeh, Yao-Tsung Chiang, Chia-Chin National Kaohsiung University of Science and Technology Department of Chemical and Materials Engineering Kaohsiung80778 Taiwan National Kaohsiung University of Science and Technology College of Maritime Department of Ph.D. Program in Maritime Science and Technology Kaohsiung807618 Taiwan National Kaohsiung University of Science and Technology Department of Mechanical Engineering Kaohsiung80778 Taiwan Fooyin University Department of Medical Laboratory Science and Biotechnology Kaohsiung83102 Taiwan

In this article, we harnessed biomedical applications in laser-assisted etching long-period fiber gratings (LLPFGs) sensors, subsequently deploying them within the realm of biomedical applications. The primary aim of this study was to devise a sensitive method for the detection of antigen-antibodies associated with rheumatoid arthritis (RA) using LLPFGs. Sensing the antigen binding took place on the surface of the optical fiber through a self-assembling process. Given the inherent limitations of conventional rheumatoid factor (RF) testing in terms of specificity, we introduced an innovative serum-based approach geared toward the identification of anti-cyclic citrullinated peptide (Anti-CCP) antibodies. This method exhibited an impressive diagnostic accuracy rate of approximately 80% for RA cases, coupled with an exceptional specificity level of 98% for individuals without RA. The incorporation of LLPFGs in the detection of RA antigen-antibodies presents a highly promising avenue for enhancing the precision and reliability of RA diagnosis. Furthermore, this research aligns closely with the United Nations Sustainable Development Goal (SDG)3, which strives to promote well-being across all age groups and advance sustainable development by addressing health-related challenges, including the accurate diagnosis of diseases like RA. © 2023 IEEE.

关键词： Antibodies

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Running hardware-Aware neural architecture search on embedded devices under 512MB of RAM

Running hardware-Aware neural architecture search on embedde...

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2024 IEEE International Conference on Consumer Electronics, ICCE 2024

作者： Garavagno, Andrea Mattia Ragusa, Edoardo Frisoli, Antonio Gastaldo, Paolo DITEN University of Genoa Department of Electrical Electronic Telecommunication Engineering and Naval Architecture Genoa16145 Italy Institute of Mechanical Intelligence Department of Excellence in Robotics and AI Scuola Superiore sant'Anna Pisa56127 Italy

ISBN: (纸本)9798350324136

This document proposes a novel approach to hardware-Aware neural architecture search (HW NAS) that considers the resources available on the computing platform running it, enabling its execution on various embedded devices. The presented HW NAS produces tiny convolutional neural networks (CNNs) targeting low-end microcontroller units (MCUs), typically involved in the Internet of Things (IoT) or wearable robotics, opening new use cases. A gateway could run it to tailor CNNs' architecture on the acquired data without using external servers, ensuring privacy. The proposed technique achieves state-of-The-Art results in the human-recognition tasks on the Visual Wake Word dataset, a standard TinyML benchmark, on several embedded devices. © 2024 IEEE.

关键词： Hardware Aware Neural Architecture Search Internet of Things TinyML Wearable robotics

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RL-based Shape Control of Rod-driven Soft Arms Using Strain Models

RL-based Shape Control of Rod-driven Soft Arms Using Strain ...

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IEEE International Conference on Soft robotics (RoboSoft)

作者： Peiyi Wang Yaxin Zeng Yuchen Sun Zhenwei Ni Muhammad Sunny Nazeer Cecilia Laschi Department of Mechanical Engineering and Advanced Robotics Centre National University of Singapore Singapore Singapore

ISBN: (数字)9798331520205

ISBN: (纸本)9798331520212

The continuous shapes of soft continuum robots with infinite degrees of freedom have potential applications in unstructured environments. However, their nonlinear behavior and compliance make them difficult to model and control. In this study, we propose a shape control scheme for rod-driven soft continuum robots and train the policy by using the reinforcement learning (RL) algorithmic implementation in a simulation environment with an theoretical strain model. The trained policy performs continuous, entire shape control (with maximum distance less than 8 mm) as well as the simulation model. By substituting the tracked positions in real robot from the strain model, the proposed control scheme bridges the large sim2real gap and reduces the distance of controlled shape to the target by 50%, from 15.93 to 7.92 mm. Our method demonstrates an effective and feasible way to control the entire 3D shape and configuration of a soft arm.

关键词： Bridges Shape control Accuracy Three-dimensional displays Shape Soft robotics Robot sensing systems Continuum robots Collision avoidance Strain

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Development of a Lower Limb Gait Asymmetry Index with Cyclogram Analysis Using Image Processing 12

Development of a Lower Limb Gait Asymmetry Index with Cyclog...

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12th RSI International Conference on robotics and Mechatronics, ICRoM 2024

作者： Etaati, Sepideh Javaherat, Fatemeh Delrobaei, Mehdi K. N. Toosi University of Technology Faculty of Electrical Engineering Department of Mechatronics Tehran Iran K. N. Toosi University of Technology Advanced Robotics and Automated Systems lab. Faculty of Mechanical Engineering Tehran Iran

ISBN: (纸本)9798331529734

Ahstract- This study focuses on developing a gait asymmetry index and applying image processing techniques to cyclogram analysis. We evaluated gait asymmetry under different walking conditions, specifically examining the effects of wearing a knee brace and holding a weight in hand. Using inertial measurement units (IMUs), we collected gait data to analyze knee, hip, and ankle angles in the sagittal plane. The joint kinematics data were assessed using our proposed asymmetry index, which combines image processing techniques and linear regression models. The proposed asymmetry index incorporates cyclogram area, trend symmetry, and the longest length of the cyclogram shape, effectively capturing variations in symmetry and providing a comprehensive measure. The results demonstrate that the proposed asymmetry index can effectively distinguish between different gait conditions. The findings potentially offer insights for researchers and clinicians in human biomechanics, aiding in the planning of interventions and the assessment of motion patterns, as well as for developers of bipedal walking robots in the field of robotic locomotion, enhancing their ability to design hardware and evaluate motion patterns. © 2024 IEEE.

关键词： Robot programming

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An Open-Source Soft Robotic Platform for Autonomous Aerial Manipulation in the Wild

arXiv

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arXiv 2024年

作者： Bauer, Erik Blöchlinger, Marc Strauch, Pascal Raayatsanati, Arman Cavelti, Curdin Katzschmann, Robert K. Soft Robotics Laboratory Department of Mechanical and Process Engineering ETH Zurich Switzerland

Aerial manipulation combines the versatility and speed of flying platforms with the functional capabilities of mobile manipulation, which presents significant challenges due to the need for precise localization and control. Traditionally, researchers have relied on offboard perception systems, which are limited to expensive and impractical specially equipped indoor environments. In this work, we introduce a novel platform for autonomous aerial manipulation that exclusively utilizes onboard perception systems. Our platform can perform aerial manipulation in various indoor and outdoor environments without depending on external perception systems. Our experimental results demonstrate the platform’s ability to autonomously grasp various objects in diverse settings. This advancement significantly improves the scalability and practicality of aerial manipulation applications by eliminating the need for costly tracking solutions. To accelerate future research, we open source3 our ROS 2 software stack and custom hardware design, making our contributions accessible to the broader research community. Copyright © 2024, The Authors. All rights reserved.

关键词： Open source software

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