AMA, Agricultural Mechanization in Asia, Africa and Latin America (AMA) (issn: 00845841) is a peer reviewed journal first published online after indexing scopus in 1982. AMA is published by Farm Machinery Industrial Research Corp and Shin-Norinsha Co. AMA publishes every subjects of general engineering and agricultural engineering.
AMA, Agricultural Mechanization in Asia, Africa and Latin America (ISSN: 00845841) is a peer-reviewed journal. The journal covers Agricultural and Biological Sciences and all sort of engineering topic. the journal's scopes are in the following fields but not limited to:Azerbaijan Medical Journal Gongcheng Kexue Yu Jishu/Advanced Engineering Science
In this paper, the results of an optimization study to calculate the optimal partial gear ratios of three-stage bevel helical gearboxes are presented. The objective of the study was to achieve the minimum gearbox bottom area. To implement it, a simulation experiment was conducted. In the experiment, the influence of eight main design parameters including the total gearbox ratio, the coefficients of wheel face width of three stages, the allowable contact stresses of all stages, and the output torque to the optimal transmission ratios of the analyzed gearbox. In addition, regression formulas determining the optimal gear ratios of the second stage u2 and the third stage u3 components have been given.
This study mentions the problem of calculating optimal gear ratio according to the objective function minimal gearbox bottom area. A review of an approach to the optimization of gear ratio is conducted. By using the Design of Experiment technique combined with the Minitab®19 software, we studied the impacts of the design variables on the optimal transmission ratio u2. The results received indicated that the input variables, as well as their interactions, have an important influence on the response u2. Finally, a useful regression model is proposed based on the experiment data and its reliability is confirmed through the results obtained.
In order to solve the problem that the crops with relatively high humidity are easy to accumulate on the shaking plate, this paper designs a cleaning device. The cleaning device comprises a first frame plate, a shaking plate, a second frame plate, a sieve body, and a driving mechanism. The shaking plate is mounted in the first frame plate and is connected to a shaking device. The second frame plate is connected to the first frame plate through a crank mechanism. The sieve body is mounted in the second frame plate. The driving mechanism is connected to the shaking device and the second frame plate, and configured for driving the shaking device to cause the shaking plate to shake and driving the second frame plate to cause the sieve body to perform a sieving motion. During operation, the shaking plate performs a variable accelerated motion, materials falling on the shaking plate are evenly delivered to a throwing rod and cleaning sieves under the action of an inertial force of the shaking plate, and the throwing rod is enabled by a crank-connecting rod mechanism to perform a throwing motion in an up- and-down reciprocating manner, which helps to scatter the materials and keep the materials in a wind field for a longer time, giving full play to the cleaning capacity of the wind field. This paper simulates the cleaning device by EDEM-Fluent coupling. The simulation results show that the cleaning device meets the general technical requirements.
Micro Finance refers to the process of lending short term loans to entrepreneurs and other individuals, who are in need of funds to fulfil their financial requirements. Banks usually lend loans to the public at a certain rate of interest but with collateral security. Some people will not have any assets for collateral security, so they end up borrowing from informal sources like pawn brokers and other money lenders who usually charge a high rate of interest. Hence, awareness must be given to the general public regarding micro finance and its lending process. The objective of this study was to analyse the difference in earnings between an agriculture farmer who borrows funds from a micro financial institution and a farmer who doesn’t borrow funds from micro financial institutions. Further, this study analysed the agricultural income levels of farmers who borrow from MFIs and non-MFIs. In addition, this study analysed the impact of agriculture farm income on the basis of their borrowing sources. This study also analysed the difference between mean interest rates across groups of agriculture farmers who borrowed from micro-finance sources and those who did not borrow from micro finance sources. Finally, this study looked at how frequently agricultural farmers borrowed money. Primary data has been collected from rural areas of Chitradurga and some parts of Uttar Karnataka district. Questionnaires were prepared for the agriculture farmers who borrow funds from the Micro Financial Institutions and for the farmers who do not prefer to borrow funds from Micro Financial Institutions [MFI]. A sample of 50 people from each group was taken. A T-test was used to perform the analysis to check for differences between agriculture farmer's farm income levels before and after microfinance was obtained. The study found that agriculture farmers who obtained micro finance had statistically better farm income than agriculture farmers who did not obtain micro-finance funding for their farming operations, suggesting that borrowing from micro finance institutions for agriculture farming operations would likely result in an increase in income from farming operations. The second finding of this study was that the mean change in farm income level, as measured by the percent change in farm income, among farmers who had obtained microfinance funding was statistically higher as compared to the mean change in agriculture farm income level among farmers who had not obtained microfinance funding. Furthermore, the study analysed the mean changes in the interest rates of MFIs in comparison with non-micro financial institutions. It was found that microfinance was charging a lower rate of interest when compared to other financial institutions. Finally, the study found that farmers who borrowed from non-MFIs borrowed more frequently than agriculture farmers who borrowed from MFIs
When a robot manipulator operates at high speeds, the elastic vibration of its links is inevitable. To study this vibration phenomenon, the present paper deals with problem of modelling, the dynamic stability control and calculating inverse dynamics of a single-link flexible manipulator. An algorithm to study dynamic stability and calculating inverse dynamics of flexible manipulators is proposed. The proposed algorithm is demonstrated and verified by the model of a flexible single-link manipulator.