Results 91 to 100 of about 13,144,896 (327)

Thermal Cycle–Microstructure–Property Relationships in Rail Steel Heat‐Affected Zone Simulated by Gleeble

open access: yesAdvanced Engineering Materials, EarlyView.
Microstructural evolution of premium rail steel during flash butt welding (FBW), comparing physically simulated heat‐affected zones with actual weld regions. Thermal cycles induce phase transformations and microstructural heterogeneity that influence weld quality and mechanical performance. These findings provide insights into optimizing FBW parameters
Emmanoelle Cintra da Cunha Araújo   +15 more
wiley   +1 more source

JAHA at Scientific Sessions 2024: Climate Change–Related Cardiovascular Health Effects in the Global South

open access: yesJournal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Climate change poses an escalating threat to cardiovascular and cerebrovascular health in the Global South, where vulnerability is amplified by rapid urbanization, poverty, and weak infrastructure.
Ana Navas‐Acien   +6 more
doaj   +1 more source

Numerical Investigation on the Influence of Hot Streak Temperature Ratio in a High-Pressure Stage of Vaneless Counter-Rotating Turbine

open access: yesInternational Journal of Rotating Machinery, 2007
The results of recent studies have shown that combustor exit temperature distortion can cause excessive heat load of high-pressure turbine (HPT) rotor blades. The heating of HPT rotor blades can lead to thermal fatigue and degrade turbine performance. In
Zhao Qingjun   +3 more
doaj   +1 more source

Thermal state simulation analysis of molten iron ladle based on different insulation measures

open access: yes工程科学学报, 2018
The turnover time for transporting a hot metal from a blast furnace to a basic oxygen furnace is long and therefore the heat preservation effects are not ideal. These factors affect the temperature and thermal state of the ladle refractories, which leads
YUAN Fei   +3 more
doaj   +1 more source

Numerical analysis of the hot-spot temperature of a power transformer with alternative dielectric liquids

open access: yesIEEE transactions on dielectrics and electrical insulation, 2017
The assessment of two vegetal oils as coolant in Low Voltage Winding of a power transformer with zigzag cooling have been analyzed. These dielectric fluids cooling performance has been compared with a typical mineral oil.
A. Santisteban   +5 more
semanticscholar   +1 more source

Digital Light Processing of Thermoplastic Poly(methyl methacrylate) Photoresin Combined With Solvent Vapor Smoothing

open access: yesAdvanced Engineering Materials, EarlyView.
A thermoplastic PMMA‐based photoresin enables high‐resolution DLP printing followed by solvent‐vapor smoothing. The treatment reduces staircase‐induced surface roughness from 2.33 µm to 129 nm and increases visible‐light transmittance from approximately 30% to 80%, providing a route toward transparent PMMA components for rapid prototyping and non ...
Rozhin Heydarpour   +5 more
wiley   +1 more source

The effect of hot-pack warming on the skin temperature of the elderly [PDF]

open access: yes, 2010
A hot-pack made of a dense polymer and warmed in a microwave oven can be used as a warming instrument. This study was performed to examine the effects of a hot-pack, which was used to warm the lower limbs, on the skin surface temperature of elderly ...
Ohshima, Chika   +3 more
core  

Influence of Fe Particle Size Distribution on Chemical Homogeneity, Microstructure, and Crack Formation in Fe–SiC Powder Blends Processed by PBF‐LB/M

open access: yesAdvanced Engineering Materials, EarlyView.
The influence of Fe particle size on in situ alloying of Fe–SiC powder blends in PBF‐LB/M is revealed. Contrary to expectations, the coarser Fe fraction provides a broader crack‐free processing window and slightly improved elemental homogeneity while producing higher but more variable hardness. The results highlight a complex trade‐off between particle
Anna Luise Strauch   +2 more
wiley   +1 more source

A case report on the physiological responses to extreme heat during Sicily's July 2023 heatwave

open access: yesPhysiological Reports
July 2023 has been confirmed as Earth's hottest month on record, and it was characterized by extraordinary heatwaves across southern Europe. Field data collected under real heatwave periods could add important evidence to understand human adaptability to
Davide Filingeri   +5 more
doaj   +1 more source

Experimental study of a novel downhole heat exchanger utilizing working fluids for enhanced heat exchange

open access: yesCase Studies in Thermal Engineering
This study designs and assesses a new type of shell and tube downhole heat exchanger (NDHE) equipped with organic working fluid (R32, R134a) to increase the thermal performance of the single well geothermal system.
Dongxi Liu   +6 more
doaj   +1 more source

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