This paper extends the multi-body dynamics modelling strategy for rigid gears to include compliant gear bodies in multi-mesh transmissions. Only external, fixed center, helical or spur gears are considered. This formulation combines distributed gear mesh stiffness and gear blank compliance models in a multi-body dynamics framework resulting in a set of non-linear differential equations with tim...

by Jason L. Taylor Editor’s Note: This edition features current research, practice, and policy related to the Joyce Foundation’s Shifting Gears initiative beginning with an interview with Whitney Smith, Manager of the Employment Program at the Joyce Foundation. Julie Strawn, Center for Law and Social Policy, presents a national perspective of basic skills reform efforts similar to Shifting Gear...

Abstract This study is an insight into the spatial use and economic performance of a fishery linked fisher wellbeing across economic, social health domains over 12-year timescale pre- post-Marine Protected Area (MPA) designation. Since MPA designation, there has been increase in vessels using static gear inside outside MPA, with significant positive trend for MPA. Over time, landings have decre...

The selectivity of fishing gears with respect to fish species and size is important, both for fisheries management and fishing operations. Purse seining is an efficient, environmentally friendly fish capture methodology generally targeting single species aggregations, but once a fish school has been selected and surrounded by the seine, there is no selections for individual size, species or cat...

During the past century, commercial fisheries have expanded from small vessels fishing in shallow, coastal habitats to a broad suite of vessels and gears that fish virtually every marine habitat on the globe. Understanding how fisheries have developed in space and time is critical for interpreting and managing the response of ecosystems to the effects of fishing, however time series of spatiall...

Fisheries bycatch is a widespread and serious issue that leads to declines of many important and threatened marine species. However, documenting the distribution, abundance, population trends and threats to sparse populations of marine species is often beyond the capacity of developing countries because such work is complex, time consuming and often extremely expensive. We have developed a flex...

Executive Summary A tagging programme for south Pacific albacore commenced in 2009 as part of the EU-funded SCIFISH project. The main objective was to obtain information on exploitation rates and movement of albacore. The first albacore tagging cruise was completed in 2009 with 2766 albacore tagged and released in the troll fishery off the west coast of New Zealand. To date, only 1 recapture ha...

All methods used to sample fish populations exhibit some degree of size selectivity, whether due the physical properties gear, behavioral responses or spatial distribution targeted population. In most stock assessments, selectivity functions are assumed and their parameters estimated a paucity empirical data necessary estimate selectivity. However, incorrect assumptions about can impart signifi...

This research article examines the significance of maritime security, as one most recent axioms international relations and diplomacy. It focuses on socioeconomic factors that contribute to insecurity along Lake Victoria's Homa Bay shores. In order determine outcome, a qualitative approach an exploratory design were used in unveiling problem under consideration. Individuals organizations/instit...

Gears are found rarely in animals and have never been reported to intermesh and rotate functionally like mechanical gears. We now demonstrate functional gears in the ballistic jumping movements of the flightless planthopper insect Issus. The nymphs, but not adults, have a row of cuticular gear (cog) teeth around the curved medial surfaces of their two hindleg trochantera. The gear teeth on one ...