Gearing is one of the most effective methods for transmitting power and rotary motion from the source to its application with or without change of speed or direction. The bending and surface strength of the gear tooth are considered to be one of the main contributors for the failure of the gear in a gear set. Thus, determination of stresses has become popular as an area of research on gears to ...

An often overlooked aspect of fisheries management is the collateral impact of fishingbycatch and habitat damage. Discussions concerning the role of marine protected areas (MPAs) and fisheries management have focused on recovering depleted fish stocks through adult immigration or larval dispersal, but relatively little discussion has focused on the use of closed areas to address collateral impa...

Helical gears are commonly used in industry as they have advantages of higher power density, quieter operation etc., compared to spur gears. Conventional gear design is based on various design criteria, including durability and bending strength load rating. In recent times, fracture failure modes are gaining importance in addition to conventional failure modes. Stresses due to operating fatigue...

This naturalistic, qualitative research investigated the extent and depth to which the perceived embedded educational skills and concepts associated with gears in a robotics environment were realized. The research literature revealed a paucity and confusion of description and definition of gears, and a lack of articulation of the embedded skills associated with gears. Based on some seminal rese...

A practical application of the spherical involute surface to the forged straight bevel gears is provided and demonstrated in this work. Conjugate (pure involute) theoretical surfaces are developed from the input design parameters. The surfaces are modified to suit the actual application (automotive differential). The unloaded (or low load) tooth contact analysis of modified surfaces is performe...

Bacteria can change course almost instantaneously, zipping towards food or away from toxins. How do such simple organisms do something so complex? It’s all in the flagella, a tail-like structure with rotating helical filaments. The flagella work in unison to propel the cell forward by rotating counterclockwise and thus bundling together. When the flagella reverse their rotation to clockwise, th...

The Joyce Foundation's Shifting Gears initiative was launched in 2007 as a state policy change effort in Indiana, Illinois, Michigan, Minnesota, Ohio, and Wisconsin. The goal is to strengthen state postsecondary, adult basic education, and skills-development systems so that more low-skilled workers gain the education, skills and credentials needed to advance and succeed in our changing economy....

Gear hobbing is a common method of manufacturing high precision involute gears. The thorough knowledge of the developing cutting forces and the wear of the cutting tool are of great importance in order to produce helical and spur gears as they influence the cost of the manufacturing process and the quality of the produced gear. HOB3D is a simulation code that enables users to simulate the proce...