Results 141 to 150 of about 36,916 (301)
The Effectiveness of Shrouding on Reducing Meshed Spur Gear Power Loss - Test Results [PDF]
Gearbox efficiency is reduced at high rotational speeds due to windage drag and viscous effects on rotating, meshed gear components. A goal of NASA aeronautics rotorcraft research is aimed at propulsion technologies that improve efficiency while ...
Delgado, I. R., Hurrell, M. J.
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Small Science, EarlyView.This review highlights recent advances in nanomedicine that enhance chimeric antigen receptor (CAR) T cell therapy against solid tumors. It discusses key barriers to CAR T cell efficacy and outlines nanotechnology‐based strategies to improve tumor targeting, remodel the immunosuppressive microenvironment, and integrate nanomaterials into CAR T cell ...
Stephen O’Rourke +3 more
wiley +1 more source
Effect of contact ratio on spur gear dynamic load [PDF]
A computer simulation is presented which shows how the gear contact ratio affects the dynamic load on a spur gear transmission. The contact ratio can be affected by the tooth addendum, the pressure angle, the tooth size (diametral pitch), and the center ...
Lin, Hsiang Hsi +3 more
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Concussed: Unintended Consequences of the Guardian Cap Mandate in the NFL
Southern Economic Journal, EarlyView.ABSTRACT Guardian Caps are padded shells worn over American football helmets to cushion impacts and reduce concussion risks. In 2022, the NFL mandated their use for specific position groups during preseason practices, later expanding this requirement. While the league praised the Caps for enhancing player safety, skeptics argue they may promote riskier
Kerianne Lawson Rubenstein, Todd Nesbit
wiley +1 more source
Embedded Interactions and Selective Disclosure: Network Effects on Conversations aboard Skylab
Symbolic Interaction, EarlyView.How do absent others influence our interactions? We argue in this paper that interactions are embedded within networks formed by chains of specific relationships between known third parties. The anticipation of future interactions with external others conditions our interpretation of the current situation and affects our behavior in the interaction. We
Michael Schultz +2 more
wiley +1 more source
Research of the Path Optimization for the NC Planing Process of the Spur Face-gear
Jixie chuandong, 2016 The principle of the NC planing process of the spur face-gear is briefly introduced,the equations of the tooth profile and the tooth cutter are derived,the mathematical relation between the tooth cutter angle and the allowance is established,and then,the
Qian Lulu, Yang Xiaoyu, Tang Jinyuan
doaj
An analytical method to predict efficiency of aircraft gearboxes [PDF]
A spur gear efficiency prediction method previously developed by the authors was extended to include power loss of planetary gearsets. A friction coefficient model was developed for MIL-L-7808 oil based on disc machine data. This combined with the recent
Anderson, N. E. +2 more
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Den attendance by Arctic foxes experiencing 10 years of increasing tourism
Wildlife Biology, EarlyView.Wildlife tourism is a growing industry, and an increasing number of people seek to observe and interact with wild animals in their natural surroundings. In Iceland, the native Arctic fox Vulpes lagopus is widespread and has been under heavy hunting pressure for centuries.
Ester Rut Unnsteinsdóttir +2 more
wiley +1 more source
On dynamic loads in parallel shaft transmissions. 1: Modelling and analysis [PDF]
A model of a simple parallel-shaft, spur-gear transmission is presented. The model is developed to simulate dynamic loads in power transmissions. Factors affecting these loads are identified.
Coy, John J. +2 more
core +1 more source