21–40 von 1,955 Ergebnissen
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    Bidirectional Reflectance Distribution Function (BRDF) Measurement of Materials Aged Under Simulated Space Environment

    Shah, Jainisha / Badura, Gregory / Hoffmann, Ryan et al. | Springer Verlag | 2024
    . However, exposure to solar radiation and aggressive chemical species in the upper atmosphere alters these materials’ physical, chemical, and ...

    Research status on preparation and properties of RE hafnates for thermal/environmental barrier coatings

    Freier Zugriff
    SUN Zhipeng / REN Yutong / LIAO Guixiu et al. | DOAJ | 2024
    caused by components on physical and chemical properties of materials. Moreover,the coupled control method of thermal,mechanical and chemical ...
    Verlag: Journal of Aeronautical Materials

    Development of Aggregate Dielectric Constant Database Protocol for Asphalt Concrete Density Prediction

    Abufares, Lama / Al-Qadi, Imad L. | Transportation Research Record | 2024
    is detailed. Advanced chemical tests confirmed that the aggregate dielectric constant is a function of its elemental/mineral compositions ...

    Responsive Maneuver Planning for Sun-Synchronous Repeating Ground Track Orbits

    Treblow, Shalom / McGrath, Ciara N. | AIAA | 2024

    This paper investigates the suitability of sun-synchronous orbits (SSOs) as an injection location for responsive, maneuverable

     ...
    Verlag: The American Institute of Aeronautics and Astronautics
    Schlagwörter: Chemical Propulsion System

    DE-NOx/CO Performance According to Ag Loading Amount and Support Type of H2-SCR

    Seo, Choong-kil | Springer Verlag | 2024
    promoted the chemical reaction of Ag. 0.5Ag/TiO2 H2-SCR showed the highest NOx conversion rate of about 18% at 200 °C, and ...
    Verlag: The Korean Society of Automotive Engineers , Seoul

    Meta-Model Based Blade Optimization Design Considering the Fluid Characteristics of Vehicle Energy Harvesting

    Kim, Hyung Jun / Kang, Seong Min / Kim, Seon Myeong et al. | Springer Verlag | 2024
    societal growth. However, this progress has also given rise to challenges, such as the depletion of chemical resources and the escalating impact of ...
    Verlag: The Korean Society of Automotive Engineers , Seoul
    Schlagwörter: Design of experiments

    Enhancing Durability of Concrete in Saline Soil with Nano-CaCO3 Modification: Investigation and Reliability Analysis

    Yang, Bo / Hu, Xiaopeng / Qiao, Hongxia | Springer Verlag | 2024

    In this study, the effect of nano-CaCO3 on the durability of concrete was investigated by simulating

     ...
    Verlag: Korean Society of Civil Engineers , Seoul

    Removal of Cs-137 from Real Liquid Radioactive Wastes Using Pumice in Fixed-Bed Column

    Gatea, Mezher Abed / Jumaah, Ghufran Farooq / Al anbari, Riyad Hassan et al. | Springer Verlag | 2024

    Decontamination of the radiological pollutants takes a flagship role in the environmental restoration. It

     ...
    Verlag: Korean Society of Civil Engineers , Seoul

    Design, Multiperspective Investigations, and Performance Analysis of Multirotor Unmanned Aerial Vehicle for Precision Farming

    Freier Zugriff
    Darshan Kumar Jayaram / Vijayanandh Raja / Beena Stanislaus Arputharaj et al. | DOAJ | 2024
    population. UAV technology is part of the agriculture revolution, which aims to boost crop yields, properly monitor fields, and handle manpower ...

    Long-Term Performance of Soybean-Based Concrete Surface Protectant under Laboratory Accelerated Aging Conditions

    Houshmand Khaneghahi, Mohammad / Mutua, Angela / He, Jialuo et al. | Transportation Research Record | 2024
    chemical compositions remained unaffected by AAC, in contrast to the control samples where a decrease in the quantity of calcium hydroxide and an ...

    Reliability analysis based on load spectrum: A structural improvement of Indian Railways three-piece freight bogie elastomeric pad

    Shukla, Sanjay / Thaplyal, Manish / Gautam, Abhishek Kumar et al. | SAGE Publications | 2024
    existing EM pads. Further, chemical and physical properties are also evaluated in M&C (Metallurgical and Chemical) and Testing Directorate of ...

    Mechanical Properties and Neural Network Prediction of Cement Fly Ash-Enhanced Roadbed Soil in Seasonal Frozen Zones Under Short-Term Curing

    Cui, Gaohang / Cheng, Zhuo / Sun, Fanyue et al. | Springer Verlag | 2024
    and cement as modifiers on the physical properties and chemical composition of subgrade soil. The study found that cement admixtures can ...
    Verlag: Korean Society of Civil Engineers , Seoul

    Analysis of Power Consumption on BOP System in a Fuel Cell Electric Bus According to the Fuel Cell Load Range

    Freier Zugriff
    Kim, Yebeen / Kim, Jiwoong / Min, Kyoungdoug | Springer Verlag | 2024
    chemical energy into electrical energy. The fuel cell system comprises a fuel cell stack and a balance of plant (BOP) system, which efficiently ...
    Verlag: The Korean Society of Automotive Engineers , Seoul
    Schlagwörter: Balance of plant system

    Low-Thrust Resonance Gravity-Assist Trajectory Design for Lunar Missions

    Lee, Jinsung / Ahn, Jaemyung | AIAA | 2024
    , yielding trajectories that break the symmetry of the resonance orbits. The multiple-point boundary-value problem seeks to solve a minimum-fuel ...
    Verlag: The American Institute of Aeronautics and Astronautics
    Schlagwörter: Chemical Propulsion System

    Novel Solid Propellants Enabled Through In Situ Martian Perchlorates

    Hoganson, Alexander C. C. / Afriat, Aaron / Wernex, Chase M. et al. | AIAA | 2024

    With evidence for the native perchlorates existing in the Martian regolith, this paper examines the feasibility and performance of

     ...
    Verlag: The American Institute of Aeronautics and Astronautics
    Schlagwörter: Thermochemistry and Chemical Kinetics

    Nonequilibrium Heating/Cooling Effects in a Mach Number 10 Hydrogen-Fueled Scramjet

    Liu, Hang / Yao, Wei / Zhang, Xu et al. | AIAA | 2024

    The influence of thermal/chemical nonequilibrium on a hydrogen-fueled

     ...
    Verlag: The American Institute of Aeronautics and Astronautics
    Schlagwörter: chemical nonequilibrium

    Multiphysics Modeling for Combustion Instability in Paraffin-Fueled Hybrid Rocket Engines

    Casalino, Lorenzo / Ferrero, Andrea / Folcarelli, Lorenzo et al. | AIAA | 2024

    The use of paraffin-based fuels is a promising approach to a low regression rate in hybrid rocket engines, and the capability to

     ...
    Verlag: The American Institute of Aeronautics and Astronautics

    Stochastic Equilibrium Analysis to Optimize Solid Propellant Combustion Gas Composition

    Michalski, Quentin / Pudsey, Adrian | AIAA | 2024
    properties, composition, and heat of formation. The calculations are performed assuming adiabatic, isobaric chemical equilibrium on synthetic species ...
    Verlag: The American Institute of Aeronautics and Astronautics

    Payload Optimization for EnVision Mission Using an Electric Propulsion Module for Interplanetary Transfers

    Valencia, Sebastian | AIAA | 2024

    This paper presents a study on the feasibility of using electric propulsion (EP) for interplanetary transfer in the context of an Earth

     ...
    Verlag: The American Institute of Aeronautics and Astronautics
    Schlagwörter: Sphere of Influence

    Feasibility study on Multiphysics H2-O2 combustion model for space debris removal system – NIRCSAT-X

    Freier Zugriff
    Gasser Abdelal / Lorenzo Stella / Yasser Mahmoudi et al. | DOAJ | 2024
    environment is ideal for initiating a chemical reaction within a pressurised chamber containing a mix of H2-O2 gases, generating heat sufficient to ...