Media Framing and Racial Attitudes in the Aftermath of Katrina

In the aftermath of Hurricane Katrina, many African Americans held fairly negative attitudes about effective and speedy government response to the storm. We employ framing theory to examine the role of race in shaping attitudes following Katrina. We hypothesize that a dominant media frame of Black storm victims led African Americans to develop a stronger empathy with storm victims, and thus, more negative views about government response. We test this hypothesis using a unique national poll of adults conducted in September 2005 that over sampled African Americans. Our results support the hypothesis that race strongly shaped attitudes following the storm.     

Rocking Behavior of Irregular Free-Standing Objects Subjected to Earthquake Motion

Free-standing rigid objects and structures are dominantly found to exhibit rocking behavior and can be vulnerable to overturning during an earthquake as demonstrated by numerous past earthquake events. Such objects are typically considered to be displacement sensitive with their rocking response being well presented by the Peak Displacement Demand (PDD) parameter of the supporting floor’s motion. This in turn can be directly related to an object’s width (along the direction of motion) for assessing its vulnerability to overturn. Such findings have been sufficiently justified by refined dynamic analysis supported by experimental evaluations which were based on rigid blocks with uniform geometric format (i.e., regular in their mass distribution). However, vulnerable rocking objects can be asymmetric and accordingly their sensitivity to floor displacement cannot be directly related to their width. The key parameter which defines irregular objects’ response to rocking motion is represented by the degree of eccentricity of their center of mass. In this study, the well-known rocking equation of motion is reconfigured and devised to model the rocking responses for 280 irregular objects undergoing eight earthquake motions which included artificial and recorded earthquakes. Analytical results obtained from solving the adjusted equation of motion were evaluated with sophisticated finite element (FE) models simulating the 280 irregular cases. This experimentally validated FE modeling approach was found to be time- and cost-effective for understating the rocking behavior of asymmetric objects as well as clarifying an interesting relationship between the object’s damping level and the condition of the supporting base (i.e., whether being provided with supports at the points of rotation or not). The rocking response of irregular objects was found to be highly influenced by the level of eccentricity of the object when excited by motions with high displacement amplitudes, while such influence was not found noticeable by wider objects. Based on the developed trends between the maximum top displacement of irregular objects and the PDD, an expression for estimating the rocking amplitudes is proposed which is a function of the object’s eccentricity.     

U.S. Environmental Policy Implementation on Tribal Lands: Trust,Neglect, and Justice

This study investigates the implementation of U.S. environmental protection laws under American Indian tribal governance. The landmark laws of the 1970s that form the core of America's environmental policy regime made no mention of American Indian tribal lands, and the subsequent research literature on environmental policy has given them little attention. The U.S. Environmental Protection Agency has primary implementation responsibility for environmental protection laws on tribal lands, which offers a unique opportunity to study direct federal implementation apart from typical joint state–federal implementation. Further, because Indian reservations are homes to a disproportionately poor, historically subjugated racial group, analysis of environmental programs on tribal lands offers a unique perspective on environmental justice. We analyze enforcement of and compliance with the Clean Water Act (CWA) and Safe Drinking Water Act (SDWA) to compare the implementation of environmental policy on tribal lands with nontribal facilities. Analysis reveals that, compared with nontribal facilities, tribal facilities experience less rigorous CWA and SDWA enforcement and are more likely to violate these laws.     

Buzz Kill: State Adoption of DUI Interlock Laws, 2005–11

Most states have adopted significant measures to reduce the incidence of driving under the influence (DUI) but a DUI death occurs about every 53 minutes; a significant portion of these accidents are the result of recidivist DUI drivers. A relatively new and novel way states can reduce DUI deaths from repeat offenders is to require offenders to install an interlock device on their vehicle, but not all states have adopted this measure. We explore whether the Policy Typology and Policy Diffusion Frameworks can help us understand the politics behind why some states have adopted interlock policies while others have not. Employing over‐time data from the American states our results suggest that the adoption of interlock laws is best explained by internal factors to the state and the adoption of interlock laws by neighboring states. In addition, the adoption of interlock laws is a form of incremental policymaking—states with existing DUI laws are more likely to adopt interlock policies. We conclude that interlock policies diffuse in a manner similar to other regulatory policies and that interlock policies should be categorized as protective regulatory policies rather than social regulatory policies.     

A Simple Model for Estimating Shocks in Unrestrained Building Contents in an Earthquake

Building contents that include cabinets housing electronic equipment are typically not rigidly secured to the floor, nor to the adjacent wall except in regions of high seismic activities. The behavior of unrestrained building contents in an earthquake is a cause of concern because of the consequence of damage to certain equipment or other forms of fragile items. Much of the research reported in the literature has been devoted to studying the rocking and sliding motion behavior of base-excited rigid objects and their risks of overturning. In contrast, this paper is concerned with estimating the impact acceleration that can be generated by the pounding of the rocking object onto the floor. Algebraic expressions for predicting the acceleration level, which can be translated into dynamic force values, are derived and illustrated by case studies. Importantly, the proposed expressions have been verified by comparisons with results from both simulated and physical experiments. In illustrating the use of the proposed analytical procedure, a parametric experimental study has been undertaken on a cushion material to study the sensitivity of its static and dynamic stiffness to changes in the boundary conditions of the cushion. The proposed calculation procedure, while simple to apply, can be used as a means of predicting shock and the dynamic forces that can be generated in an object in the course of the response to an earthquake.