Results 61 to 70 of about 4,984 (269)
Strategic Management Journal, EarlyView.Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani +2 more
wiley +1 more source
Jixie chuandong, 2011 Parametric design is to use parameters to describe sizes of parts.When the part is designed,the shape of parts is changed by modifying characteristic parameters to achieve the sizes to drive the graphics.Cylindrical involute helical gear is a part of ...
王书贤, 汪云, 邓利军, 张王进
doaj
Lubricant Jet Flow Phenomena in Spur and Helical Gears with Modified Addendums; for Radially Directed Individual Jets [PDF]
This paper develops the mathematical relations for the Virtual Kinetic Model as an improvement over the vectorial model developed earlier. The model solution described provides the most energy efficient means of cooling gears, i.e., it requires the least
Akin, Lee S., Townsend, Dennis P.
core +1 more source
The low-noise optimisation method for gearbox in consideration of operating conditions [PDF]
, 2014 This paper presents a comprehensive procedure to calculate the steady dynamic response and the noise radiation generated from a stepping-down gearbox.
Kang, J, Sun, W, Tao, Q, Zhou, J
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Small, EarlyView.ABSTRACT The rapid expansion of the Internet of Things (IoT) and wearable electronics necessitates sustainable power sources to replace the limited electrochemical battery. While mechanical energy harvesting offers a promising solution, traditional harvesters face challenges of irregular and low−frequency environmental sources. This review presents the
Yongbin Han +2 more
wiley +1 more source
Jixie chuandong, 2010 The geometrical parameters of the involute arc cylindrical gear are introduced.Starting from their tooth flank equations,the equations of the lines of contact and contact ratio are analyzed.On this basis,it proposes the method for calculating the contact
吴伟伟 +3 more
doaj
Study on stress intensity factors for crack on involute spur gear tooth
Advances in Mechanical Engineering, 2015 Investigating the stress intensity factors has a great importance to predict the fatigue damage for the involute spur gears. The aim of this article is to reveal the variation laws of stress intensity factors for crack on the involute spur gear tooth ...
Jian Cai +3 more
doaj +1 more source
On the Undercutting of Involute Gear
Journal of the Society of Mechanical Engineers, 1936 従來インボリュート歯車の切り下げに関しては專らErnest Wildhaber氏とGeorg Olah氏のものとが使用されてゐる。然しこれ等のものは何れも近似式で、その結果も実際の値とかなりのかけへだてがある。依つて新たに正確なインボリュートの切り下げを表す式を導き、これに依つて従來の値を訂正したのが本論文である。
openaire +2 more sources
Dynamic Capacity and Surface Fatigue Life for Spur and Helical Gears [PDF]
A mathematical model for surface fatigue life of gear, pinion, or entire meshing gear train is given. The theory is based on a previous statistical approach for rolling-element bearings. Equations are presented which give the dynamic capacity of the gear
Coy, J. J. +2 more
core +1 more source
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