Relationships of soil, grass, and bedrock over the Kaweah serpentine melange through spectral mixture analysis of AVIRIS data

A linear mixing model is used to model the spectral variability of an AVIRIS scene from the western foothills of the Sierra Nevada and calibrate these radiance data to reflectance. Five spectral endmembers from the AVIRIS data, plus an ideal 'shade' endmember were required to model the continuum reflectance of each pixel in the image. Three of the endmembers were interpreted to model the surface constituents green vegetation, dry grass, and illumination. These are the main transient surface constituents that are expected to change with shifts in land use or climatic influences and viewing conditions ('shade' only). The spectral distinction between the other three endmembers is very small, yet the spatial distributions are coherent and interpretable. These distributions cross anthropogenic and vegetation boundaries and are best interpreted as different soil types. Comparison of the fraction images to the bedrock geology maps indicates that substrate composition must be a factor contributing to the spectral properties of these endmembers. Detailed examination of the reflectance spectra of the three soil endmembers reveals that differences in the amount of ferric and ferrous iron and/or organic constituents in the soils is largely responsible for the differences in spectral properties of these endmembers

Culture Affects our Beliefs about Firearms, But Data are Also Important

Dan Kahan and Donald Braman’s provocative analysis contends that because people’s beliefs about firearms are primarily formed by cultural values, empirical data are unlikely to have much effect on the gun debate. Their proposed solution to this quandary is that scholars who want to help resolve the gun controversy should identify precisely the cultural visions that generate this dispute and formulate appropriate strategies for enabling those visions to be reconciled in law. In response to Kahan and Braman’s challenge to empirical research, I argue that while culture influences beliefs, it is but one of several such factors. Alongside culture (and presumably other factors as well), empirical evidence has a powerful influence on beliefs about gun control. In the first Part of this Commentary I discuss how cultural beliefs can significantly affect individuals’ beliefs about firearms and discuss strategies for helping people overcome their cultural biases to more honestly evaluate empirical evidence. The second Part provides examples of how data have played an important role in affecting individuals’ beliefs about firearms. I conclude by urging renewed attention to empirical research to inform the gun control debate.

How Do Labor Markets Affect Crime? New Evidence on an Old Puzzle

For nearly 50 years academics have been studying how labor markets affect crime. The initial interesting and important theoretical and empirical work generated substantial interest in studying crime among economists, in particular, and scholars in the social sciences more broadly. This literature, which is decades old and contains hundreds of papers, is characterized by an intriguing puzzle – the large gap between the theory and empirical work. While the hypothesis that growing labor markets reduce crime seems obvious and is widely accepted by many policy makers and academics, empirical results fail to show consistent evidence in support of this theory. The primary contribution of this chapter is to document how recent research – primarily since the late 1990s – makes substantial progress in resolving this disconnect between the theory and empirics. To accomplish this goal, I discuss a few very important empirical problems that until the last 10 years have not been systematically addressed. The central conclusion of this chapter is that recent research that addresses these important questions consistently provides evidence to buttress the contention that labor market opportunities have important effects on crime, especially property crime.wages, unemployment, labor markets, crime

Spectroscopy of Moses Rock Kimberlite Diatreme

Three types of remote sensing data (Airborne Imaging Spectroscopy (AIS), NS001, Zeiss IR-photographs) were obtained for the Moses Rock kimberlite dike in southern Utah. The goal is to identify and characterize the mantle derived mafic component in such volcanic features. The Zeiss and NS001 images provide information on the regional setting and allow units of the dike to be distinguished from surrounding material. A potential unmapped satellite dike was identified. The AIS data provide characterizing information of the surface composition of the dike. Serpentized olivine-bearing soils are (tentatively) identified from the AIS spectra for a few areas within the dike

Standard Voting Power Indices Work: An Experimental Investigation of Pure Voting Power

We evaluate the accuracy of power indices by experimentally measuring the political power embodied in blocks of votes per se. The experiment incorporates several subjects interacting in online chat rooms under supervision. Chat rooms and processes for selecting subjects reduce or eliminate extraneous political forces leaving logrolling as the primary political force. Results show that two standard power indices reflect voting power while other power indices and proportionality do not.Voting, Power Index, P Power, Shapley-Shubik, Banzhaf, Johnston, Burgin, Experiment.

Application of imaging spectrometer data to the Kings-Kaweah ophiolite melange

The Kings-Kaweah ophiolite melange in east-central California is thought to be an obducted oceanic fracture zone and provides the rare opportunity to examine in detail the complex nature of this type of terrain. It is anticipated that the distribution and abundance of components in the melange can be used to determine the relative importance of geologic processes responsible for the formation of fracture zone crust. Laboratory reflectance spectra of field samples indicate that the melange components have distinct, diagnostic absorptions at visible to near-infrared wavelengths. The spatial and spectral resolution of AVIRIS is ideally suited for addressing important scientific questions concerning the Kings-Kaweah ophiolite melange and fracture zones in general

Report of the Georgia Governor’s Wokers’ Compensation Review Commission

The Commission appointed by Governor Barnes consists of fourteen members, three ex officio members, and seven advisory members. This group includes academics, members of the legislature, claimants attorneys, defense attorneys, representatives from the insurance industry, organized labor, the textile industry, and government agencies. It was charged by the Governor to review and evaluate Georgia’s laws and procedures affecting workers’ compensation. The Commission’s primary goal was to prepare an accurate description of the current workers’ compensation system in Georgia. More specifically, this Report provides detailed information regarding the number of claims, benefits paid to employees, employer costs, and insurance profitability. It also compares workers’ compensation costs and benefits in Georgia with those in other states, particularly our Southeastern neighbors. Our purpose is to determine whether workers’ compensation costs place Georgia employers at a competitive disadvantage in regional and national markets. In preparing this Report, the Commission relied on the most recent available reports and data collected by organizations such as the National Academy of Social Insurance, the National Council on Compensation Insurance, the Workers Compensation Research Institute, the United States Department of Labor, and the Georgia State Board of Workers’ Compensation.Workers' Compemsation, wages, unemployment, disability, indemnity

Business Profitability and Social Profitability: Evaluating Industries with Externalities, The Case Casinos.

Casino gambling is a social issue, because in addition to the direct benefits to those who own and use casinos, positive and negative externalities are reaped and borne by those who do not gamble. To correctly assess the total economic impact of casinos, one must distinguish between business profitability and social profitability. This paper provides the most comprehensive framework for addressing the theoretical cost–benefit issues of casinos by grounding cost–benefit analysis on household utility. It also discusses the current state of knowledge about the estimates of both the positive and negative externalities generated by casinos. Lastly, it corrects many prevalent errors in the debate over the economics of casino gambling.casino, crime, gambling, social costs, externality