The Evolution of Two-Stage Agricultural Ditches In the United States

2012 ◽  
Author(s):  
J L D'Ambrosio ◽  
R M Kallio ◽  
A D Ward ◽  
J D Witter ◽  
J Tank ◽  
...  
Keyword(s):  
United States ◽  
The United States ◽  
Two Stage

CROSS-CULTURAL COMPARISON OF RESPONSES TO THE MONTY HALL DILEMMA

1999 ◽  
Vol 27 (4) ◽  
pp. 431-437 ◽  
Author(s):  
Donald Granberg
Keyword(s):  
United States ◽  
Conditional Probability ◽  
The United States ◽  
Cross Cultural ◽  
Cultural Comparison ◽  
Two Stage ◽  
Initial Decision ◽  
Probability Problem ◽  
Cross Cultural Comparison ◽  
Monty Hall Dilemma

Students in Brazil, China, Sweden, and the United States were compared as to how they responded to a two-stage conditional probability problem. In each culture, there was not only a significant tendency to stick with an initial decision when they should stick, but also to stick when they should switch. On this type of problem, the four cultures did not differ significantly.

The Economic and Organizational Basis of Early United States Strikes, 1900–1948

ILR Review ◽  
1982 ◽  
Vol 35 (4) ◽  
pp. 491-503 ◽  
Author(s):  
Jack W. Skeels
Keyword(s):  
United States ◽  
Twentieth Century ◽  
Least Squares ◽  
The United States ◽  
Ordinary Least Squares ◽  
Economic Factors ◽  
Least Squares Regression ◽  
Two Stage ◽  
Strike Activity ◽  
Political Variables

This paper examines the question of whether economic factors played an important role in determining strike activity in the United States in the first half of the twentieth century. A review of recent research shows one author, David Snyder, concluding that economic factors mattered little during that period and that union organization and political variables explained much more; and another, P. K. Edwards, concluding the opposite. A retest of these authors' analyses, employing ordinary least squares regression and a variety of measures, suggests that Snyder's position is more sound. This author argues, however, that Edwards was correct in claiming that economic factors are major determinants of the extent of unionism as well as of strike activity, and thus one needs to apply a two-stage least squares test of the Snyder hypothesis. When that is done, the results show that economic variables are highly significant determinants of strike activity throughout the pre-1949 period, but for the subperiod 1921–29 noneconomic factors also play a role.

scholarly journals A Study on Minimizing Welding Deformation of Joints for the Sealing of Emission After-Treatment Structure

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6982
Author(s):  
Sungwook Kang ◽  
Wangho Yun ◽  
Hwanjin Kim ◽  
Jaewoong Kim ◽  
Changwook Ji ◽  
...  
Keyword(s):  
United States ◽  
Quality Improvement ◽  
Environmental Pollution ◽  
Environmental Regulations ◽  
The United States ◽  
Welding Deformation ◽  
Two Stage ◽  
Welding Sequence ◽  
Plastic Analysis ◽  
Treatment Structure

As the environmental pollution issue has recently become significant, environmental regulations in Europe and the United States are being strengthened. Thus, there is a demand for the quality improvement of emission after-treatment systems to satisfy the strengthened environmental regulations. Reducing the amount of welding heat distortion by optimization of the welding order of each part could be a solution for quality improvement since the emission after-treatment system consists of many parts and each assembly is produced by welding individual ones. In this research, a method to derive a welding sequence that effectively minimizes welding deformation was proposed. A two-stage simulation was performed to obtain the optimal welding sequence. In the first stage, the welding sequence was derived by analyzing the number of welding groups in each assembly of a structure. The derived welding sequence was verified by performing a thermal elasto-plastic analysis and comparing it with the experimental results.

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