Results 81 to 90 of about 17,569 (305)

Application of Structural Principles to the Design of Triptycene-Based Molecular Gears with Parallel Axes

CHIMIA, 2009
This perspective discusses the important aspects of the design of molecular gear systems based on triptycene. Molecular systems are categorized into three classes according to the orientation of the gear axes: i) bent (bevel gears), ii) linear ...
Derik K. Frantz, Kim K. Baldridge, Jay S. Siegel   +2 more
doaj   +1 more source

Comparison of spur gear efficiency prediction methods [PDF]

The predictions of five spur-gear efficiency calculation methods were compared with three sets of test data using different gear geometries. The data and the analysis methods were limited to jet lubricated, ground, spur gears. The data covered a range in
Anderson, N. E., Loewenthal, S. H.
core   +1 more source

Dynamics of a split torque helicopter transmission [PDF]

, 1992
A high reduction ratio split torque gear train has been proposed as an alternative to a planetary configuration for the final stage of a helicopter transmission. A split torque design allows a high ratio of power-to-weight for the transmission.
Krantz, Timothy, Rashidi, Majid
core   +2 more sources

Clinical and demographic characteristics of adolescents, emerging adults, and young adults presenting to an emergency department following a suicide attempt

JCPP Advances, EarlyView.
Abstract Introduction Suicide is a significant public health concern and the second leading cause of death in adolescents and young adults. This study sought to better understand differences in demographic and clinical characteristics of young people who attempted suicide during three phases of this developmental period: late adolescence (14–17 years),
Nicholas M. Brdar, Natasha K. Matta, Chloe A. Miner, Mubashshir R. Bhuiyan, Irmgard G. Pallas, Anna L. Bickersteth, Hailey G. Prokop, Lindsay A. Bornheimer   +7 more
wiley   +1 more source

Performance Evaluation of 3D-Printed ABS and Carbon Fiber-reinforced ABS Polymeric Spur Gears

BioResources
Acrylonitrile butadiene styrene (ABS) polymer and carbon fiber reinforced acrylonitrile butadiene styrene (CF/ABS) spur gears were 3D-printed using fusion deposition modeling (FDM) with different fillet radii of 0.25, 0.50, and 0.75 mm.
Vigneshwaran Karupaiah, Venkateshwaran Narayanan, Rajini Nagarajan, Sikiru O. Ismail, Faruq Mohammad, Hamad A. Al-Lohedan, Kumar Krishnan   +6 more
doaj   +2 more sources

DESIGN OF A SPUR GEAR BASED ON THE RELATIVE CURVATURE CONTROL AND ANALYSIS OF ITS STRESS AND MESH STIFFNESS

Jixie qiangdu
The relative curvature of the spur gear mesh point is one of the key geometric parameters of the tooth profile, which has a significant impact on the stress distribution and mesh stiffness of the gear.
CHEN Zhiwei, LIU Lei, KONG Rong
doaj  

Design of Spur Gears for Improved Efficiency [PDF]

A method to calculate spur gear system loss for a wide range of gear geometries and operating conditions was used to determine design requirements for an efficient gearset.
Anderson, N. E., Loewenthal, S. H.
core   +1 more source

Machine Design Experiments Using Gears to Foster Discovery Learning [PDF]

, 2015
Machine Design Experiments Using Gears to Foster Discovery Learning For the typical undergraduate engineering student the topic of gears is introduced and discussed in several courses.
Nagurka, Mark L., Slightam, Jonathon Earl   +1 more
core   +1 more source

Does Mobile Money Adoption Improve Dietary Quality? Assessing Household and Individual Level Impacts in Cameroon

Journal of International Development, EarlyView.
ABSTRACT Mobile money—a digital financial service—has proliferated in many developing countries. Owing to its ability to reduce transaction costs and allow even the poor to be financially included, it has been widely adopted. While a growing body of literature has examined its welfare effects, its effects on diet quality of households and individuals ...
Francis E. Ndip, Perez L. Kemeni Kambiet   +1 more
wiley   +1 more source

Tooth contact analysis of spur gears. Part 2-Analysis of modified gears

MATEC Web of Conferences, 2017
The misalignment between gears axes or direction deviations of teeth leads accentuate the edge effect, Modified spur gears which localize the initial bearing contact by proper modifications of the lead profile are used to avoid the development of the ...
Pop Nicolae, Creţu Spiridon
doaj   +1 more source