Theoretical and experimental investigation of wear during coupling in internal gears coated with various polymeric coating materials was performed in this study. In the theoretical part of the study, Archards’ wear formulation was adapted to internal gears and wear behavior in various conditions was determined. Moreover, a fatigue and wear testing apparatus having similar working principle with...

When evaluating fishing gear catches, the focus is often on a few species as opposed to entire catch. In some fisheries this can lead ignoring major part of catch composition. Thus, there need for more holistic approach when ecological impact using specific and comparing two or gears. context, it relevant have method that describes total quantifies proportions being wanted unwanted. study, we o...

The purpose of the current study was to develop and validate an automatic algorithm for classification of cross-country (XC) ski-skating gears (G) using Smartphone accelerometer data. Eleven XC skiers (seven men, four women) with regional-to-international levels of performance carried out roller skiing trials on a treadmill using fixed gears (G2left, G2right, G3, G4left, G4right) and a 950-m tr...

The main objective of this work is the development a Computational Fluid Dynamics model coupled with structural code for simulation and optimization fishing gears. As nets are highly deformable structures under influence incident water, use merely empirical correlations hydrodynamic forces, such as those used in many codes, does not provide precise predictions their behaviour. coupling between ...

Designers have tried for many years to apply noncircular gears in automatic machines and instruments. The obstacle was the lack of effective methods of generation of noncircular gears similar to those applied for the generation of circular gears. However, researchers have continued the investigation of application of noncircular gears – see the earlier works by Burmester (Burmester, 1888), Golb...

This thesis focuses on reliability when testing gear efficiency and on how gear mesh efficiency can be increased without detrimental effects on the gears. Test equipment commonly used in gear research was analysed to identify important parameters for gear efficiency testing. The effect of the bearing model’s load-dependent losses on gear mesh efficiency was also investigated. Two different surf...

Due to the continuous exploitation of skipjack tuna in waters Ternate Island, using active pole and line fishing gears, population is suspected experience degradation Island. Therefore, this research was conducted with aim analyzing status populations Island based on dynamics studies, including parameters growth, mortality, recruitment rate. Experimental methods were implemented measure fish le...

Hypoxic conditions in estuaries are one of the major factors responsible for declines inhabitat quality. Previous studies examining the effects of hypoxia on crustacea have focused onindividual/population-level, physiological or molecular responses but have not considered morethan one type of response in the same study. The objective of this study was to integratedisciplines by ...

gears are one of the most critical components in power transmission system of an automobile and also many rotating machinery. many studies have been conducted on optimum gear design. the main objective is to design different aluminium metal matrix composite spur gears before and after optimization. aluminium metal matrix material composites are preferred mostly due to their low density. also th...

In the future, agriculture alone may not produce food needed to feed increasing world population. Hence, it can be augmented by developing irrigation and water resources, mainly fisheries resources. Ethiopia, especially in Tana Sub-basin, expanded practices building dams weirs along tributaries of Lake did consider nor development management. The aim this research was, therefore, promote integr...