2,198 research outputs found

    Monitoring the Relationship Between the Public and Public Lands: Application to Wilderness Stewardship in the U.S.

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    Stakeholders in wilderness, and other public lands, have varying opinions on how well the land management agencies reflect their values and respond to their needs in management, and they therefore vary in their level of commitment and attachment to these places and the activities that occur there. Establishing baseline measures and monitoring indicators of the relationship between the public and wilderness lands can provide efficient evaluations of many management activities. Examples include protection of traditional relationships for indigenous people, and the enhancement and protection of relationships between the resource and both local and distant populations of stakeholders.Most social science monitoring by wilderness managers in the U.S. has focused on either visitors’ perceived quality of experiences or a small set of commonly used indicators of threats to those experiences (Watson and Williams 1995). Measures of satisfaction, perceptions of crowding, number of encounters with other visitors while traveling and at campsites, perceptions of recreation visitor impacts to soil and vegetation, and other commonly used social science indicators imply a customer orientation between the agency and the public. The primary evaluation of how well public land managers are doing in their stewardship responsibilities is reflected through the quality of these transactions. That is, public land managers have been judged by their ability to provide particular conditions utilized during a visit.Recent research has, however, suggested that stewardship responsibilities may also be evaluated through indicators of the relationship that is created, protected or restored through public lands management activities (Alessa and Watson 2002, Shroyer and others 2003). This approach, described as public purpose marketing by Borrie and others (2002a) and Watson and Borrie (2003), emphasizes understanding relationships, in addition to monitoring transactions, as the primary stewardship responsibility of public land managers. The purpose of this paper is to describe why wilderness monitoring programs should include protocol for monitoring relationships between people and wilderness

    Determinants of Trust for Public Lands: Fire and Fuels Management on the Bitterroot National Forest

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    Management of public lands occurs today with high levels of scrutiny and controversy. To succeed, managers seek the support, involvement, and endorsement of the public. This study examines trust as an indicator of managerial success and attempts to identify and measure the components that most influence it. A review of trust literature yielded 14 attributes that were hypothesized to contribute to trust, grouped into the three dimensions of Shared Norms and Values, Willingness to Endorse, and Perceived Efficacy. Operationalizing these attributes and dimensions, a telephone survey was administered to a sample of Montana, USA, residents living adjacent to the Bitterroot National Forest (n = 1,152). Each of the attributes was measured in the context of federal lands fire and fuel management. Structural equation modeling showed that all 14 attributes were found to be influential contributors to levels of trust. Results suggest that if managers are to maintain or increase levels of public trust, they need to consider each of trust’s attributes as they make social, ecological, and economic resource decisions

    Threats and Changes Affecting Human Relationships with Wilderness: Implications for Management

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    For wilderness managers, the ability to recognize threats and changing conditions is vital. While these threats are typically associated with resource and social conditions, they can also be investigated relative to wilderness relationships. This paper explores how threats and changes may be affecting human relationships with wilderness and the possible implications for management. Previously, threats have been conceptualized as affecting ecosystem integrity or stakeholder values. This paper suggests these conceptualizations should be expanded to also consider the meanings and relationships attributed to wilderness. From such a lens, threats such as global climate change, wildland fire, and invasive species can dramatically influence both the wilderness landscape and the meanings associated with its character. They fundamentally alter the place in ways that conflict with personal histories and previous experiences. Thus, managers must be charged with finding ways to protect and foster these human relationships. Addressing threats to these relationships may also require managers to develop approaches that mitigate or adapt to these relationships over time. These approaches need to proactively define and protect a diversity of meanings and values to ensure ongoing human relationships with wilderness

    Rose growing in Hawaii

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    Legislative Intent, Science and Special Provisions in Wilderness: A Process for Navigating Statutory Compromises

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    In order to manage special provisions in U.S. wilderness, several research products are needed. Minimally, a complete understanding of the legislative intent of the provision, in-depth understanding of the deep meanings held by the particular stakeholder community of interest, and some knowledge about the larger population of interest are needed. In this study of jet boat use on the Salmon River in the Frank Church– River of No Return Wilderness, a combination of qualitative and quantitative methods were used to understand the attachment jet boat users have to the activity and the place

    Extreme asteroids in the Pan-STARRS 1 Survey

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    Using the first 18 months of the Pan-STARRS 1 survey we have identified 33 candidate high-amplitude objects for follow-up observations and carried out observations of 22 asteroids. 4 of the observed objects were found to have observed amplitude Aobs1.0A_{obs}\geq 1.0 mag. We find that these high amplitude objects are most simply explained by single rubble pile objects with some density-dependent internal strength, allowing them to resist mass shedding even at their highly elongated shapes. 3 further objects although below the cut-off for 'high-amplitude' had a combination of elongation and rotation period which also may require internal cohesive strength, depending on the density of the body. We find that none of the 'high-amplitude asteroids' identified here require any unusual cohesive strengths to resist rotational fission. 3 asteroids were sufficiently observed to allow for shape and spin pole models to be determined through light curve inversion. 45864 was determined to have retrograde rotation with spin pole axes λ=218±10,β=82±5\lambda=218\pm 10^{\circ}, \beta=-82\pm 5^{\circ} and asteroid 206167 was found to have best fit spin pole axes λ=57±5\lambda= 57 \pm 5^{\circ}, β=67±5\beta=-67 \pm 5^{\circ}. An additional object not initially measured with Aobs>1.0A_{obs}>1.0 mag, 49257, was determined to have a shape model which does suggest a high-amplitude object. Its spin pole axes were best fit for values λ=112±6,β=6±5\lambda=112\pm 6^{\circ}, \beta=6\pm 5^{\circ}. In the course of this project to date no large super-fast rotators (Prot<2.2P_{rot} < 2.2 h) have been identified.Comment: 31 pages; accepted by A

    Optimization of switching losses and capacitor voltage ripple using model predictive control of a cascaded H-bridge multi-level StatCom

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    This paper further develops a Model Predictive Control (MPC) scheme which is able to exploit the large number of redundant switching states available in a multi-level H-bridge StatCom (H-StatCom). The new sections of the scheme provide optimised methods to trade off the harmonic performance with converter switching losses and capacitor voltage ripple. Varying the pulse placement within the modulation scheme and modifying the heuristic model of the voltage balancing characteristics allows the MPC scheme to achieve superior performance to that of the industry standard phase shifted carrier modulation technique. The effects of capacitor voltage ripple on the lifetime of the capacitors is also investigated. It is shown that the MPC scheme can reduce capacitor voltage ripple and increase capacitor lifetime. Simulation and experimental results are presented that confirm the correct operation of the control and modulation strategies

    Definition of Nonresponse to Analgesic Treatment of Arthritic Pain: An Analytical Literature Review of the Smallest Detectable Difference, the Minimal Detectable Change, and the Minimal Clinically Important Difference on the Pain Visual Analog Scale

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    Our objective was to develop a working definition of nonresponse to analgesic treatment of arthritis, focusing on the measurement of pain on the 0–100 mm pain visual analog scale (VAS). We reviewed the literature to assess the smallest detectable difference (SDD), the minimal detectable change (MDC), and the minimal clinically important difference (MCID). The SDD for improvement reported in three studies of rheumatoid arthritis was 18.6, 19.0, and 20.0. The median MDC was 25.4 for 7 studies of osteoarthritis and 5 studies of rheumatoid arthritis (calculated for a reliability coefficient of 0.85). The MCID increased with increasing baseline pain score. For baseline VAS tertiles defined by scores of 30–49, 50–65, and >65, the MCID for improvement was, respectively, 7–11 units, 19–27 units, and 29–37 units. Nonresponse can thus be defined in terms of the MDC for low baseline pain scores and in terms of the MCID for high baseline scores

    A novel cellular pathway of antigen presentation and CD4 T cell activation in vivo

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    Dendritic cell activation of CD4 T cells in the lymph node draining a site of infection or vaccination is widely considered the central event in initiating adaptive immunity. The accepted dogma is that this occurs by stimulating local activation and antigen acquisition by dendritic cells, with subsequent lymph node migration, however the generalizability of this mechanism is unclear. Here we show that in some circumstances antigen can bypass the injection site inflammatory response, draining freely and rapidly to the lymph nodes where it interacts with subcapsular sinus (SCS) macrophages resulting in their death. Debris from these dying SCS macrophages is internalized by monocytes recruited from the circulation. This coordinated response leads to antigen presentation by monocytes and interactions with naïve CD4 T cells that can drive the initiation of T cell and B cell responses. These studies demonstrate an entirely novel pathway leading to initiation of adaptive immune responses in vivo
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