6,176 research outputs found

    Mixed tenure orthodoxy: practitioner reflections on policy effects

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    This article examines mixed tenure as a policy orthodoxy. It first sets out how mixed tenure may be considered to constitute an orthodoxy within planning, being generally accepted as a theory and practice even in the absence of supporting evidence. Five elements of this orthodoxy are identified, relating to (1) housing and the environment, (2) social change, (3) economic impacts, (4) sustainable communities, (5) and sociospatial integration. Interviews with practitioners involved with three social housing estates that have experienced mixed-tenure policy interventions are reported to consider why the implementation and effects of mixed tenure might not correspond with the orthodox understanding. It is argued that policy ambiguity and weaknesses in policy theory and specification, alongside practical constraints, lie behind incomplete and counterproductive policy implementation, but a belief in pursuing the policy orthodoxy persists nevertheless

    Similarities and contrasts in tectonic and volcanic style and history along the Colorado plateaus-to-basin and range transition zone in Western Arizona: Geologic framework for tertiary extensional tectonics

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    The overall temporal and spatial relations between middle Tertiary volcanism and tectonism from the Basin and Range province onto the edge of the Colorado Plateaus province suggest that a single magnetic-tectonic episode affected the entire region more or less simultaneously during this period. The episode followed a post-Laramide (late Eocene through Oligocene) period of 25 million years of relative stability. Middle Tertiary volcanism did not migrate gradually eastward in a simple fashion onto the Colorado Plateau. In fact, late Oligocene volcanism appears to be more voluminous near the Aquarius Mountains than throughout the adjacent Basin and Range province westward to the Colorado River. Any model proposed to explain the cause of extension and detachment faulting in the eastern part of the Basin and Range province must consider that the onset of volcanism appears to have been approximately synchronous from the Colorado River region of the Basin and Range across the transition zone and onto the edge of the Colorado Plateaus

    MODELING THE EFFECT OF SPATIAL EXTERNALITIES ON INVASIVE SPECIES MANAGEMENT

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    Changes in production conditions associated with biological invasions can be complex. As a result, modeling invasive species management decisions can be difficult. Modeling these decisions is further compounded by externalities associated with spatial relationships among growers. In order to calculate optimal management decisions, an accurate bioeconomic model of the feedback between grower decisions and the new biological interactions created by an invasive species population is needed. In this paper, a bioeconomic model is used to explicitly analyze how externalities caused by spatial relationships among agricultural producers affect optimal invasive species management decisions. The example of the coordinated greenhouse whitefly management in the Oxnard, CA, area is discussed. This is an interesting example because of the complex cycle of host crops used by the whitefly and the effect this cycle has on the optimal whitefly management decisions for strawberry growers. Three research objectives achieved in this paper include first, using the model to assess how the spatial relationship among growers affects incentives for regional invasive pest management. Second, analyze whether current policies could be adjusted to substitute for coordination among growers. Third, the use of the bioeconomic model to identify factors for this specific case that affect whether or not growers may voluntarily coordinate their management decisions. We find that spatial relationships among growers affect the need for coordination in the strawberry/whitefly case. Whitefly migrations across host crop fields require growers to manage the whitefly on a regional basis in order to maximize strawberry producer welfare. The results also indicate that the amount of effort needed to achieve coordination required is limited; the only requirement is that information related to field management be shared among growers of whitefly host crops. The results from the bioeconomic model describe the biological and economic feedback of the grower's decision which allows policymakers to identify the willingness of producers to coordinate at various times of year. In the Oxnard strawberry/whitefly case, for example, growers will not find it optimal to adjust their application timing for a second immigration of adult greenhouse whiteflies when they occur near the end of the season, such as in May or June, but will for earlier points in the season. Three policy implications of the results from the strawberry/whitefly case are also discussed in the paper. First, adjustments to current policies regulating whitefly management do not remove the need for coordination among growers to them. Also, it was found that current policies do not, by themselves, generate the need for coordination. Finally, the results show it is not always necessary to create a central agency for regional invasive species management.Invasive species, strawberry, greenhouse whitefly, externality, optimal management, Research Methods/ Statistical Methods,

    Guidelines for fabrication of hybrid microcircuits

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    Document is summary of approaches that may be taken in designing hybrid microcircuits similar to those for aerospace application

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    Creating Inclusive Extension Programs

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    To develop more inclusive programs, Extension professionals should attend to self-awareness, communication, and program structure. We suggest engaging in reflection and examining word choices and program decisions to make programs more welcoming to all members of the communities we serve. Extension professionals should incorporate these practices in their work to meet the needs of increasingly diverse communities

    Vibrational Stability of NLC Linac accelerating structure

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    The vibration of components of the NLC linac, such as accelerating structures and girders, is being studied both experimentally and analytically. Various effects are being considered including structural resonances and vibration caused by cooling water in the accelerating structure. This paper reports the status of ongoing work.Comment: 3 pages 8 figures Presented at EPAC 2002 Paris Franc

    Persistent low adherence to hypertension treatment in Kyrgyzstan: How can we understand the role of drug affordability?

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    It is well known that cardiovascular diseases (CVD) are a growing cause of mortality and morbidity in low-and middle-income countries (LMIC). While hypertension (HTN), a leading risk factor for CVD, can be easily managed with widely available medicines, there is a huge gap in treatment for HTN in many LMIC. One such country is Kyrgyzstan, where HTN is a major public health concern and adherence to medication is low. The reasons for low adherence in Kyrgyzstan are not well understood, but some evidence suggests that HTN medicines may be unaffordable for low-income families, resulting in inequitable access to HTN treatment. With data from the 2010 Kyrgyzstan Integrated Household Survey, we estimate the prevalence and factors associated with adherence to HTN medication in Kyrgyzstan. We then investigate the hypothesis that affordability may be an important factor in adherence to HTN medication. Using the coarsened exact matching approach, we estimate the economic burden faced by households with at least one member with elevated blood pressure (EBP) in Kyrgyzstan and their risk of catastrophic spending on health care. We find that EBP households have significantly higher total expenditure on health, as well as on medicines, and are more likely to experience catastrophic health spending, suggesting that out-of-pocket expenditure for EBP may be prohibitively expensive for the poorest in Kyrgyzstan. Our findings also reveal a high prevalence of self-medication (i.e. purchasing and using medication without a doctor's prescription), and increased expenditure due to self-medication, among those with EBP. Our research suggests that affordability of HTN medicines may be an important factor in low adherence to treatment in Kyrgyzstan. Low affordability may be due partly to the prescription of medicines that are not reimbursable under the national drug benefit plan, but more research is needed to identify solutions to the affordability problem
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