Metropolitan Influence and Land Use Competition in Potential Biomass Crop Production: A Spatial Demographic Analysis

Biomass is one alternative energy source that is currently being investigated to combat the growing U.S. dependence on foreign oil. In this study, we explore where traditional farming practices and metropolitan influence will compete for land use against farmland located in optimal biomass crop production zones. To date, no consideration of the impact of urbanization and human development has been taken into account. Here we make a take a seminal approach to examining this relationship given previous analyses. We use overlapping LISA statistics to identify significant clusters of counties facing competition for land use. To measure competition for land use in counties located within biomass zones circa 2000, we use population growth and housing data from Census Bureau estimates, farmland data from the Census of Agriculture, and remotely sensed land use/cover data from the United States Geological Survey. The implications of these factors and how they will potentially affect biomass crop production are discussed.     

Domestic violence: a priority in child protection in New South Wales,Australia?

Over the last several years there has been increasing awareness of the connection between domestic violence and child abuse, yet only minimal attention has been paid to the implications of this for child protection practice. This article begins to address this gap. Drawing on research undertaken in New South Wales (NSW), Australia, it examines child protection practice in relation to children and young people who have been exposed to domestic violence. The research involved analysis of the responses of the statutory child protection authority in NSW (the Department of Community Services or DoCS) to abuse allegations involving domestic violence. The data are drawn from observation and analysis of the initial responses to referrals to DoCS and the ‘tracking’ of a sample of these referrals over an 18 month period. From the data obtained, it is evident that domestic violence referrals are treated less seriously than other referrals, with more being confirmed as abuse but fewer resulting in follow up or intervention. The implications of this for child protection practice are teased out. Copyright © 2007 John Wiley & Sons, Ltd.     

A note on the invertibility of nonlinear ARMA models

We review the concepts of local and global invertibility for a nonlinear auto-regressive moving-average (NLARMA) model. Under very general conditions, a local invertibility analysis of an NLARMA model shows the generic dichotomy that the innovation reconstruction errors either diminish geometrically fast or grow geometrically fast. We derive a simple sufficient condition for an NLARMA model to be locally invertible. The invertibility of the polynomial MA models is revisited. Moreover, we show that the threshold MA models may be globally invertible even though some component MA models are non-invertible. One novelty of our approach is its cross-fertilization with dynamical systems.     

Article: 2

Summary. Searching for an effective dimension reduction space is an important problem in regression, especially for high dimensional data. We propose an adaptive approach based on semiparametric models, which we call the (conditional) minimum average variance estimation (MAVE) method, within quite a general setting. The MAVE method has the following advantages. Most existing methods must undersmooth the nonparametric link function estimator to achieve a faster rate of consistency for the estimator of the parameters (than for that of the nonparametric function). In contrast, a faster consistency rate can be achieved by the MAVE method even without undersmoothing the nonparametric link function estimator. The MAVE method is applicable to a wide range of models, with fewer restrictions on the distribution of the covariates, to the extent that even time series can be included. Because of the faster rate of consistency for the parameter estimators, it is possible for us to estimate the dimension of the space consistently. The relationship of the MAVE method with other methods is also investigated. In particular, a simple outer product gradient estimator is proposed as an initial estimator. In addition to theoretical results, we demonstrate the efficacy of the MAVE method for high dimensional data sets through simulation. Two real data sets are analysed by using the MAVE approach.     

Metropolitan Proximity and U.S. Agricultural Productivity, 1978–1997*

Abstract Metropolitan encroachment into surrounding countrysides has had noticeable consequences on American agriculture. This research examines gross farm sales in five categories of crops and five categories of livestock and poultry by county proximity to metropolitan areas. A seven‐category classification of counties was derived from the 1983 and 1993 Economic Research Service/Beale rural‐urban codes and used in the analysis. Our findings showed a significant metropolitan influence on agricultural sales of crop and livestock commodities, particularly those commodities that can be intensively produced on few numbers of acres. Some of this influence is attributed to the rapid growth of the urban areas during the past quarter century. Our results challenge widely‐held traditional perceptions about the spatial organization of agricultural production in the United States.     

Microenvironmental Analysis of Residential Exposure to Chromium-Laden Wastes in and Around New Jersey Homes

The purpose of this study was to identify the significant microenvironments that can lead to chromium exposure in Hudson County, New Jersey residential settings near or on soil contaminated with chromium waste. Measurements were made in indoor air, outdoor air, and house dust. Surface dust was found to be the best index of potential Cr exposure. The values of Cr in Hudson County household dust ranged from 3.25-320 ng/cm2 in wipe samples and 1.0-12 ng/cm2 in vacuum samples. Elevated Cr in household dust was found to be related to residential locations near large chromium waste sites, household cleaning habits, and house renovation activities. Outdoor Cr air levels were similar to those obtained in other urban areas at these seasons of the year, approximately 5-7 ng/m3. Comparisons with measurements of the Cr levels in urine found that the elevated Cr in dust was associated with elevated excretion of Cr. Site-specific Cr differences in household dust suggest different sources and routes of exposure. Within the total group of homes in the present study, Cr in household dust was the major influence on household exposure.     

Gender and the Transmission of Civic Engagement: Assessing the Influences on Youth Civic Activity*

The study of civic activity has become a central focus for many social scientists over the past decade, generating considerable research and debate. Previous studies have largely overlooked the role of youth socialization into civic life, most notably in the settings of home and school. Further, differences along gender lines in civic capacity have not been given sufficient attention in past studies. This study adds to the literature by examining the potential pathways in the development of youth civic activity and potential, utilizing both gender‐neutral and gender‐specific structural equation modeling of data from the 1996 National Household Education Survey. Results indicate that involvement by parents in their child’s schooling plays a crucial, mediating role in the relationship between adult and youth civic activity. Gender differences are minimal; thus adult school involvement is crucial for transmitting civic culture from parents to both female and male youth.     

FROM SOCIAL PROBLEM TO PERSONAL ISSUE: THE LANGUAGE OF LIFESTYLE

In this paper the way in which the concept of lifestyle has been mobilized in the debate over healthcare in the last decade is analysed. Has the USA become a more compassionate nation as former President George Bush urged? Or have neo-conservative and right-wing groups continued to impede the democratization of well-being? And, in the absence of full democratization through public provision, how have private sector health and fitness industries capitalized upon the lifestyle concept in the marketing of their wares? These questions are addressed as they pertain to the United States in the time immediately prior to and during the Clinton period.     

Gender differences in predicting high-risk drinking among undergraduate students

The purpose of this study was to examine gender differences in college students' high-risk drinking as measured by an estimated blood alcohol concentration (eBAC) based on gender, height, weight, self-reported number of drinks, and hours spent drinking. Using a developmental/contextual framework, high-risk drinking is conceptualized as a function of relevant individual characteristics, interpersonal factors, and contextual factors regularly mentioned in the college drinking literature. Individual characteristics include race, gender, and age; interpersonal characteristics include number of sexual partners and having experienced forced sexual contact. Finally, contextual factors include Greek membership, living off-campus, and perception of peer drinking behavior. This study is a secondary data analysis of 1,422 students at a large university in the Southeast. Data were gathered from a probability sample of students through a mail survey. A three-step hierarchical logistic regression analysis showed gender differences in the pathway for high-risk drinking. For men, high-risk drinking was predicted by a combination of individual characteristics and contextual factors. For women, interpersonal factors, along with individual characteristics and contextual factors, predicted high-risk drinking, highlighting the importance of understanding female sexual relationships and raising questions about women's risk-taking behavior. Implications for prevention and assessment are discussed.