We provide several examples of the use of geometric reasoning with three-dimensional spacetime diagrams, rather than algebraic manipulations using three-dimensional Lorentz transformations, to analyze problems in special relativity.
Social movement theory has rarely been tested with counterfactual cases, that is, instances in which movements do not emerge. Moreover, contemporary theories about political opportunity and resources often inadequately address the issue of motivation. To address these shortcomings, this article examines 20 communities that are "at risk" for mobilization because...
We estimate the impact of strict and multiple use protected areas on forest disturbance in European Russia between 1985 and 2010. We construct a spatial panel dataset that includes five periods of change. We match protected areas to control observations and compare coefficients from fixed versus random effects models. We...
This report summarizes the activities of the Fish Commission of Oregon from July 1966 to June 1968. It contains information on the different divisions of the Commission, and summarizes research projects the Research Division was working on. It also includes general operations reports and a financial statement.
The objectives of this study include an attempt to determine what broad fields of education are most essential to the welfare of Orissa in the light of her intense current problems. It must suggest definite goals and areas for study by the adults of the province. Some development of the...