On the stability and ergodicity of adaptive scaling Metropolis algorithms

The stability and ergodicity properties of two adaptive random walk Metropolis algorithms are considered. The both algorithms adjust the scaling of the proposal distribution continuously based on the observed acceptance probability. Unlike the previously proposed forms of the algorithms, the adapted scaling parameter is not constrained within a predefined compact interval. The first algorithm is based on scale adaptation only, while the second one incorporates also covariance adaptation. A strong law of large numbers is shown to hold assuming that the target density is smooth enough and has either compact support or super-exponentially decaying tails.Comment: 24 pages, 1 figure; major revisio

The Relationships Among Adaptive Behaviors of Children with Autism Spectrum Disorder, Their Family Support Networks, Parental Stress, and Parental Coping

Purpose: The purpose of this study was to examine the adaptive behaviors of children with Autism Spectrum Disorder (ASD), their family support networks, parental stress, and parental coping and the relationships among these variables. Background: Autism is the fastest growing diagnosed developmental disorder. When parents receive a diagnosis of autism for their child, mothers and fathers are affected differently. The costs to families of children with autism are personal, social, and affect family finances and day to day living. Parents of a child with autism are at high risk for increased stress levels. The child’s socially unacceptable behaviors and communication problems contribute to parental stress. Available and accessible support services for children with autism, their caregivers, and families are often inadequate to address the increasing numbers of children being diagnosed with autism. Methods: A descriptive, correlational, cross-sectional study was conducted with a purposive sample of 75 parents/primary caregivers of children with ASD. Parents provided information about the adaptive behaviors of their child with autism, family support networks, parental stress, and parental coping. Pearson product-moment correlation was used to identify the relationships between the variables. Multiple regression analysis was performed to identify which of the independent variables better predicted parental coping patterns. Findings and Conclusion: The adaptive behaviors of children with autism were negatively correlated with parental behaviors which focused on continuing to seek and use social support, self-respect, and emotional strength. Parents’ views of the support their family received were positively correlated with parental behaviors that concentrated on family adjustment, teamwork, and a positive meaning of the situation. A trend toward significance was found between adaptive behaviors of the child with autism and paternal stress. These results bring new challenges and thoughts about how the children with autism and their families can be assisted. Parents who are coping with the added stresses in their lives need support that addresses the abilities of their child with autism, their own patterns of coping, and the resources available to their family

Perceptions and utilization of riparian forest buffers by farming interest located in the Big Sunflower Watershed

The field of Landscape Architecture can further develop a niche for the design of sustainable productive landscapes. This study attempts to understand a major stakeholders’ perceptions and use of riparian buffers and other conservation practices for water quality in an agricultural watershed of Mississippi. A survey was distributed to agricultural producers in the Big Sunflower Watershed of the MS Delta. The survey informs the interested parties of producers’ perceptions and uses of riparian forested buffers, perceptions and uses of conservation practices that restore water quality, perceptions of their environment, perceptions of surface water quality, enrollment of governmental incentive programs, and utilization of digital technology. Analysis of this data could lead to a better understanding of the knowledge and attitudes farmers have of the riparian systems and watershed processes at work within the region and factors that influence the farmers’ decisions of implementing conservation plans

Perceptions and utilization of riparian forest buffers by farming interest located in the Big Sunflower Watershed

The field of Landscape Architecture can further develop a niche for the design of sustainable productive landscapes. This study attempts to understand a major stakeholders’ perceptions and use of riparian buffers and other conservation practices for water quality in an agricultural watershed of Mississippi. A survey was distributed to agricultural producers in the Big Sunflower Watershed of the MS Delta. The survey informs the interested parties of producers’ perceptions and uses of riparian forested buffers, perceptions and uses of conservation practices that restore water quality, perceptions of their environment, perceptions of surface water quality, enrollment of governmental incentive programs, and utilization of digital technology. Analysis of this data could lead to a better understanding of the knowledge and attitudes farmers have of the riparian systems and watershed processes at work within the region and factors that influence the farmers’ decisions of implementing conservation plans

An economic analysis of a pneumococcal vaccine programme in people aged over 64 years in a developed country setting.

BACKGROUND: Polysaccharide pneumococcal vaccination for older adults is being introduced in developed country settings. Evidence of protection by this vaccine against pneumococcal pneumonia, or confirmation that illness and death from bacteraemia are prevented, is currently limited. Decisions are often made based on partial information. We examined the policy implications by exploring the potential economic benefit to society and the health sector of pneumococcal vaccination in older adults. METHODS: A model to estimate the potential cost savings and cost-effectiveness of a polysaccharide pneumococcal vaccine programme was based on costs collected from patients, the literature, and routine health-services data. The effect of a pneumococcal vaccine (compared with no vaccination) was examined in a hypothetical cohort aged over 64 years. The duration of protection was assumed to be 10 years, with or without a booster at 5 years. RESULTS: If it were effective against morbidity from pneumococcal pneumonia, the main burden from pneumococcal disease, the vaccine could be cost-neutral to society or the health sector at low efficacy (28 and 37.5%, respectively, without boosting and with 70% coverage). If it were effective against morbidity from bacteraemia only, the vaccine's efficacy would need to be 75 and 89%, respectively. If protection against both morbidity and mortality from pneumococcal bacteraemia was 50%, the net cost to society would be 2500 pounds per year of life saved ( 3365 pounds from the health-sector perspective). Results were sensitive to incidence, case-fatality rates, and costs of illness. CONCLUSIONS: A vaccine with moderate efficacy against bacteraemic illness and death would be cost-effective. If it also protected against pneumonia, it would be cost-effective even if its efficacy were low