scholarly journals OPTIMUM WORKING CONDITIONS FOR VARIABLE WIDTH PLOUGHS

2021 ◽  
pp. 248-254
Author(s):  
Petru Cardei ◽  
Cristian Nuţescu ◽  
Mihai Matache ◽  
Oana Cristea

In this paper, a few assessments of the optimal parametric combinations in the operating regime of agricultural aggregates with ploughs of variable width are made. The starting point was from a classic expression of the tillage draft force required for traction. In order to find optimal points, some problems of constrained extreme have been formulated. Extremes provided by the optimal working width and speed have been found. Such optimal points have existed in the literature, for about half a century. Using these theoretical estimates of the optimal points sought, assessments of the possibilities for their experimental validation were made. Basic conditions for an experimental plan are formulated to highlight such optimal points.

1941 ◽  
Vol 18 (7) ◽  
pp. 338
Author(s):  
C E Ferree ◽  
G Rand

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
R. Bayuaji ◽  
M. F. Nuruddin

This research explains the results of an investigation carried out to understand the influence of a microwave incinerated rice husk ash (MIRHA) powder on foamed concrete (FC) hydration. The experimental work was designed using the Taguchi approach. This method was selected to have a target for the optimum working conditions of the parameter that affects some physical properties of concrete mixtures. The loss on ignition (LOI) method was used to establish the nonevaporable water (wn) content at all selected ages of hydration. It was observed that the MIRHA powder showed lower nonevaporable water contents than the normal FC, indicating that MIRHA powder facilitated enhancement in FC hydration. The optimum FC properties were achieved at 10% MIRHA composition as proven from the highest compressive strength. This level corresponds to the highest values in change in nonevaporable water and degree of hydration.


2019 ◽  
pp. 129-137
Author(s):  
Marcin Böhm

The essence of this paper is to illustrate the genuine link between the norms contained in the medieval twenty-four first laws of oléron that have survived to modern times, binding certain legal solutions in the space over the ages. The Laws of oléron contain norms relating to contemporary maritime labour law. Certainly they are not a model fully reflected in the maritime labor Convention (mlC 2006). nevertheless, these principles can be an interesting starting point for discussions on the importance of decent working conditions and the lives of seafarers on ships from a few centuries perspective and the importance of maritime safety culture.


1976 ◽  
Vol 5 (4) ◽  
Author(s):  
Erik Gurgsdies

AbstractThis report attempts to give a survey of development and state of Swedish research on welfare. It concentrates on surveys conducted by the socalled Low Income Committee which can be considered as the starting point of research on welfare in Sweden.After a short chronological presentation of the works of the Low Income Committee as well as some followup studies the underlying welfare concept will be discussed. First, all problems are being discussed which are related to the decision to measure welfare by nine level of living components: health, nutrition, housing, childhood and family conditions, schooling, work and working conditions, economic ressources, political ressources, leisure. Second, the further determination of the welfare concept by constructing social indicators of empirical relevance is described. Finally, there is a survey of the most important publications about Swedish research on welfare.


2018 ◽  
Vol 7 (4.6) ◽  
pp. 257
Author(s):  
M. Srilatha ◽  
R. Hemalatha

In small-scale industries, under extreme working conditions, personnel are frequently involved in lifting and carrying raw materials, which is hazardous at times. Robot, a machine with intelligence can perform the same task with the help of control instructions fed by computer or remote control. Technological development in the area of robotics made it possible to design robotic arm with the same degree of precision as a replacement to the human intervention. This will introduce automation in small-scale industries, which saves time, reduces human effort and expenditure in production. Further, this will be a starting point for complete automation of entire process, which can be expensive and complicated. NI LabVIEW along with NI-myRIO can provide a better solution in designing a more precise and accurate robot in a very low cost, which is affordable by small-scale industries. NI-myRIO is used to generate and acquire signals for controlling and processing. Further it has an inbuilt processor and FPGA which has many reconfigurable analogue and digital features.  


2019 ◽  
Vol 7 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Maryann Bylander

In the context of sharply increasing levels of international migration, development actors across Southeast Asia have begun to focus their attention on programming intended to make migration safer for aspiring and current migrant workers. These projects, however, typically begin with the assumption that more regular, orderly migration is also safer for migrants, an idea built into the language of the Sustainable Development Goals and the Global Compact on Migration. This article questions this assumption. It takes as its starting point the observation that migrant workers who move through legal channels do not systematically experience better outcomes among a range of indicators. Based on data collected from Cambodian, Burmese, Laotian, and Vietnamese labor migrants recently returned from Thailand, this work highlights the limits of regular migration to provide meaningfully “safer” experiences. Although migrants moving through regular channels report better pay and working conditions than those who moved through irregular channels, they also systematically report working conditions that do not meet legal standards, and routinely experience contract substitution. In other areas, regular migrants generally fare similarly to or worse than irregular migrants. They are more likely to experience deception and to have written or verbal agreements broken in migration processes. On arrival in Thailand, they routinely have their documents held, and they are more likely than irregular migrants to experience harassment and abuse both in the migration process and at their worksites. They are also more likely to return involuntarily and to struggle with financial insecurity and indebtedness after returning. These findings challenge mainstream development discourses seeking to promote safer migration experiences through expanding migration infrastructure. At the same time, they highlight the need for policymakers, development actors, and migration practitioners to reconsider the conflation of “safe” with “regular and orderly” migration throughout their programming.


2011 ◽  
Vol 211-212 ◽  
pp. 285-289
Author(s):  
Fu Sen Wu ◽  
Yi Jian Huang ◽  
Shan Xu

In order to find out a new type of MR damper for block making machine, the signals of displacement in the vibration process during the test are collected and the time series AR model of trispectrum for analyzing the dynamic characteristics of the MR damper is built. It turns out that , in different working conditions, slices of trispectrum are applied to obtain the signal’s non-Gaussian, nonlinear amplitude-frequency characteristics which are very important for us to select the optimum working parameters of the MR damper.


2011 ◽  
Vol 197-198 ◽  
pp. 1464-1468
Author(s):  
Hui Qun Ye

This paper presents the results of experimental analysis and theoretical research of piezoelectric stack actuators. The key is to understand the behavior of piezoelectric materials mechanical loads in this paper, and to determine optimum working conditions. Based on analysis of some parameters and driven model, which are necessary to performing design optimization to achieve maximum energy transfer and minimum power consume.


2017 ◽  
Vol 12 (4) ◽  
Author(s):  
Yousheng Chen ◽  
Andreas Linderholt ◽  
Thomas J. S. Abrahamsson

Correlation and calibration using test data are natural ingredients in the process of validating computational models. Model calibration for the important subclass of nonlinear systems which consists of structures dominated by linear behavior with the presence of local nonlinear effects is studied in this work. The experimental validation of a nonlinear model calibration method is conducted using a replica of the École Centrale de Lyon (ECL) nonlinear benchmark test setup. The calibration method is based on the selection of uncertain model parameters and the data that form the calibration metric together with an efficient optimization routine. The parameterization is chosen so that the expected covariances of the parameter estimates are made small. To obtain informative data, the excitation force is designed to be multisinusoidal and the resulting steady-state multiharmonic frequency response data are measured. To shorten the optimization time, plausible starting seed candidates are selected using the Latin hypercube sampling method. The candidate parameter set giving the smallest deviation to the test data is used as a starting point for an iterative search for a calibration solution. The model calibration is conducted by minimizing the deviations between the measured steady-state multiharmonic frequency response data and the analytical counterparts that are calculated using the multiharmonic balance method. The resulting calibrated model's output corresponds well with the measured responses.


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