40 research outputs found
Analysis of the Effects of Large Lot Zoning
No full textThis study extends a test for the presence of binding zoning, originally developed to be applied across many adjacent jurisdictions, so that it can be applied within a single jurisdiction. This study also demonstrates how to carry out this test in the presence of spatially correlated OLS residuals by using a mixed effects model whose coefficients are estimated using the maximum likelihood technique. The study examines twenty years of land sales data from a Midwestern county containing two adjacent cities surrounded by rural areas. A thirty-five-acre acre, minimum lot size in the rural area is found to be binding; while a 9,000 square foot minimum lot size in the cities is found to be not binding.
Uprooting Diversity? Peasant Farmers’ Market Engagements and the on-Farm Conservation of Crop Genetic Resources in the Guatemalan Highlands
No full textThe long-term security of the global food supply is contingent upon the on-farm conservation of crop genetic diversity. Without it, food crops lack the ability to evolve in the face of new pests, emerging plant diseases, and changing environmental conditions. The genetic diversity of many of humankind’s major food crops is cultivated in the field, primarily by peasant farmers of the global south. As the widening of global markets affects the lives of these farmers in new ways, the future provisioning of crop genetic resources and, ultimately, the security of the global food supply is in doubt. The author investigates how the participation of Guatemalan peasants in the market economy is related to the on-farm conservation of crop genetic diversity in three crops: maize, legumes, and squash. Participation in markets is not inherently detrimental to the provisioning of crop genetic resources but, without the proper protections in place, market participation may unleash processes that contribute to genetic erosion over time. The author concludes by sketching seven policy prescriptions that would encourage the on-farm conservation of crop genetic diversity in a way that is consistent with peasant farmers’ development objectives.crop genetic resources, peasant agriculture, food security, market integration, Guatemala
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Who Are America’s Poor Children? Examining Health Disparities Among Children in the United States
No full textGood health goes a long way, as research suggests that poor health in childhood not only impedes early child development, but can also have lasting consequences on children’s future health and wellbeing. Although many would agree that a health is a fundamental right, children born into low-income families are less likely to enjoy this right.
As part of NCCP’s Who are America’s Poor Children? series, this report draws on the National Health Interview Survey (NHIS) and the National Health and Nutrition Examination Survey (NHANES) to provide an overview of the health of America’s children by poverty status from 2007 to 2009. To assess health disparities
Marked oestrous cycle-dependent regulation of rat arterial KV 7.4 channels driven by GPER1.
No full textBACKGROUND AND PURPOSE: Kcnq-encoded KV 7 channels (termed KV 7.1-5) regulate vascular smooth muscle cell (VSMC) contractility at rest and as targets of receptor-mediated responses. However, the current data are mostly derived from males. Considering the known effects of sex, the oestrous cycle and sex hormones on vascular reactivity, here we have characterised the molecular and functional properties of KV 7 channels from renal and mesenteric arteries from female Wistar rats separated into di-oestrus and met-oestrus (F-D/M) and pro-oestrus and oestrus (F-P/E). EXPERIMENTAL APPROACH: RT-qPCR, immunocytochemistry, proximity ligation assay and wire myography were performed in renal and mesenteric arteries. Circulating sex hormone concentrations were determined by liquid chromatography-tandem mass spectrometry. Whole-cell electrophysiology was undertaken on cells expressing KV 7.4 channels in association with G-protein-coupled oestrogen receptor 1 (GPER1). KEY RESULTS: The KV 7.2-5 activators S-1 and ML213 and the pan-KV 7 inhibitor linopirdine were more effective in arteries from F-D/M compared with F-P/E animals. In VSMCs isolated from F-P/E rats, exploratory evidence indicates reduced membrane abundance of KV 7.4 but not KV 7.1, KV 7.5 and Kcne4 when compared with cells from F-D/M. Plasma oestradiol was higher in F-P/E compared with F-D/M, and progesterone showed the converse pattern. Oestradiol/GPER1 agonist G-1 diminished KV 7.4 encoded currents and ML213 relaxations and reduced the membrane abundance of KV 7.4 and interaction between KV 7.4 and heat shock protein 90 (HSP90), in arteries from F-D/M but not F-P/E. CONCLUSIONS AND IMPLICATIONS: GPER1 signalling decreased KV 7.4 membrane abundance in conjunction with diminished interaction with HSP90, giving rise to a 'pro-contractile state'
Regional Variations in Early Intervention Utilization for Children with Developmental Delay
No full textInvestigation of remote sensing techniques as inputs to operational resource management models
No full textThere are no author-identified significant results in this report
Real Estate Programs: A Note on Publication Performance
No full textThis study reports the publication performance of academic programs in real estate and authors using a database drawn from ten major real estate journals (868 articles by 577 authors from 206 universities) published during the period 1978 through 1982. Universities and authors are classified into ranked clusters using hierarchical cluster analysis of standardized pages published in the set of journals examined. Omitting publications whose author(s) are affiliated with the university that edits the journal in which the publication appears (the editorship effect) significantly drops the ranking of all but one of these universities, suggesting that editorship of a journal greatly enhances the publication performance of most universities.
Influence of Coolant Flow Rate on Tool Life and Wear Development in Cryogenic and Wet Milling of Ti-6Al-4V
No full textAbstractThe use of cryogenic coolants has emerged as a way to improve productivity in machining Ti-alloys. In this study, liquid carbon dioxide is used as coolant in face milling of Ti-6Al-4V with PVD coated inserts. The influence of coolant flow rate on tool life is studied by means of controlled experiments. Tool life is shown to improve with higher flow rates of coolant, the effect being stronger in cryogenic compared to wet milling due to the fact that the cryogenic coolant delays the wear development. The tool life is determined by notch wear irrespective of coolant nature in titanium milling. Different analyses were used to understand the mechanism behind the delay of notch wear development when using carbon dioxide coolant
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Pediatric Medical Homes: Laying the Foundation of a Promising Model of Care
No full textIn recent years the nation's health care system has accelerated the development and implementation of a new model of patient care -- the medical home. States, insurers, health care delivery systems, and individual practices are increasingly exploring ways to leverage medical homes to improve the quality of care and limit increases in health care costs. This Thrive report describes the current status of the medical home concept and explains how it has been broadly defined, applied to children, and measured. It also reports on the number and characteristics of American children served by medical homes and discusses opportunities to further leverage medical homes to improve medical care and achieve better health outcomes for young children, with a particular focus on the coordination of care for vulnerable children. The medical home concept builds on the foundations of primary care and managed care. Though the model is increasingly being recommended for all people, medical home implementation often prioritizes the goal of improving the quality and management of care for individuals with chronic disease or other critical health-impacting factors. Originally conceived by pediatricians over four decades ago, the medical home concept has become much more visible recently, particularly within the context of health care reform. The development of the medical home model of primary care can be traced back to the 1960s, but not until the 1990s did the advent of managed care prompt more focused exploration of potential payment models that could support broader implementation of medical homes. As a result, recent years have seen a high degree of activity around the definition, accreditation, and reimbursement of medical homes
Investigation of remote sensing techniques as inputs to operational resource management
No full textThe author has identified the following significant results. Visual interpretation of 1:125,000 color LANDSAT prints produced timely level 1 maps of accuracies in excess of 80% for agricultural land identification. Accurate classification of agricultural land via digital analysis of LANDSAT CCT's required precise timing of the date of data collection with mid to late June optimum for western South Dakota. The LANDSAT repetitive nine day cycle over the state allowed the surface areas of stockdams and small reservoir systems to be monitored to provide a timely approximation of surface water conditions on the range. Combined use of DIRS, K-class, and LANDSAT CCT's demonstrated the ability to produce aspen maps of greater detail and timeliness than was available using US Forest Service maps. Visual temporal analyses of LANDSAT imagery improved highway map drainage information and were used to prepare a seven county drainage network. An optimum map of flood-prone areas was developed, utilizing high altitude aerial photography and USGS maps
