1,377 research outputs found

    Resolving Range Conflict in Nevada? Buyouts and Other Compensation Alternatives

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    To mitigate adverse effects on ranchers from reduced access to public forage, financial or other forms of ‘compensation’ may be required. In this paper, we use results from a survey of Nevada ranchers to examine ranchers’ willingness to sell grazing permits and participate in other schemes that enable them to continue ranching in spite of declining access to public forage. On average ranchers demand $255 per AUM to sell grazing permits, while support for other programs, some of which are performance based, depends on whether respondents trust public agencies and intend to pass their ranch on to an heir.Compensation for grazing rights, environmental services, range economics

    Social Dilemmas and Public Range Management: Results from the Nevada Ranch Survey

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    Since the late 1960s, the Nevada ranch community has come under increasing pressure from environmental groups regarding their use of public lands for livestock grazing, thus increasing tension between ranchers and public land managers and potentially reducing the social capital that facilitates action and cooperation in range management. In this paper, we use responses to a survey of all public grazing permit holders in Nevada to investigate the changing relationships between ranchers and the public land agencies, and its potential implications. In particular, we investigate factors that affect ranchers’ trust in the public land agencies, and then factors that influence the nature of the relationship between ranchers and the Bureau of Land Management and U.S. Forest Service. Low levels of trust between ranchers and public managers were most significantly related to previous disagreements and the belief in a poor future for ranching. The occurrence of wildfire on grazing land contributed most signifcantly to increased disagreement between ranchers and public agencies. Finally, as a response to conflict in the ranch community, community based initiatives, such as grass banking, are examined for their potential to bring stakeholders together to realize and address common goals. Community involvement in decision making may increase levels of social capital, reduce transaction costs, and thus allow for more effective and efficient use of the range resources.Institutions and social capital, effectiveness of range management policies

    INITIAL APPLICATIONS OF FUZZY SET PROCEDURES FOR ESTIMATION OF EXPORT BASE EMPLOYMENT

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    Current export base methods that calculate basic and non-basic employment are too restrictive because they fail to account for uncertainty involved in the process. This paper shows the assignment of industries as either basic or non-basic by the location quotient procedure does not consistently represent the data for Nevada counties. Using fuzzy set procedures and membership functions in conjunction with the location quotient allow more flexibility in terms of matching the data for each industry in the region of interest. Using fuzzy set procedures we determine the proportion of employment that is basic and non-basic in nine non-governmental industries.Labor and Human Capital,

    Concurrent constraint programming with process mobility

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    We propose an extension of concurrent constraint programming with primitives for process migration within a hierarchical network, and we study its semantics. To this purpose, we first investigate a "pure " paradigm for process migration, namely a paradigm where the only actions are those dealing with transmissions of processes. Our goal is to give a structural definition of the semantics of migration; namely, we want to describe the behaviour of the system, during the transmission of a process, in terms of the behaviour of the components. We achieve this goal by using a labeled transition system where the effects of sending a process, and requesting a process, are modeled by symmetric rules (similar to handshaking-rules for synchronous communication) between the two partner nodes in the network. Next, we extend our paradigm with the primitives of concurrent constraint programming, and we show how to enrich the semantics to cope with the notions of environment and constraint store. Finally, we show how the operational semantics can be used to define an interpreter for the basic calculus.

    A study of the bound states for square potential wells with position-dependent mass

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    A square potential well with position-dependent mass is studied for bound states. Applying appropriate matching conditions, a transcendental equation is derived for the energy eigenvalues. Numerical results are presented graphically and the variation of the energy of the bound states are calculated as a function of the well-width and mass.Comment: To appear in Phys. Lett. A (Present e-mail of A.G: [email protected]

    Temporary extra jobs for immigrants : merging lane to employment or dead-end road in welfare?

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    We evaluate the effects of the most frequently used German welfare-to-work program on the employment chances of immigrant welfare recipients. In particular, we investigate whether program effects differ between immigrants and natives and what might cause these potential differences. Our results reveal that the program fails to achieve its objectives. The effects are more adverse for natives, but the program does not help otherwise identical immigrants to leave the welfare system either. Therefore, the program is a dead-end road rather than a merging lane to regular employment both for natives and for immigrants

    Enhancing Science Impact in the Coastal Zone through Adaptive Learning

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    The impact of science to support coastal management may be reduced through social and institutional barriers. Some of these barriers include ineffective community engagement, lack of interaction between scientists and decision makers, and institutional decision-making tradition related to hierarchical mandates. A three-year project has commenced to examine the role of adaptive learning in overcoming some of these barriers to maximize pathways for science and improve decisions made in the coastal zone. Adaptive learning is one of five project areas targeted to enhance science impact, being undertaken by a consortium of nine Australian universities funded through the CSIRO Collaboration Fund. Two of the strategies being explored to maximize adaptive learning to improve science impact include: (i) development of an on-line toolkit for embedding adaptive learning within coastal organizations; and (ii) development and testing of monitoring and evaluation frameworks to improve adaptive learning interventions. While focused on an Australian context, the project addresses broad issues of social and institutional barriers that have relevance for many coastal scientists and decision makers around the globe

    Studying the local character of Raman features of single-walled carbon nanotubes along a bundle using TERS

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    Here, we show that the Raman intensity of the G-mode in tip-enhanced Raman spectroscopy (TERS) is strongly dependent on the height of the bundle. Moreover, using TERS we are able to position different single-walled carbon nanotubes along a bundle, by correlating the observed radial breathing mode (RBM) with the AFM topography at the measuring point. The frequency of the G- mode behaves differently in TERS as compared to far-field Raman. Using the RBM frequency, the diameters of the tubes were calculated and a very good agreement with the G--mode frequency was observed

    Competition as rational action : why young children cannot appreciate competitive games

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    Understanding rational actions requires perspective taking both with respect to means and with respect to objectives. This study addresses the question of whether the two kinds of perspective taking develop simultaneously or in sequence. It is argued that evidence from competitive behavior is best suited for settling this issue. A total of 71 kindergarten children between 3 and 5 years of age participated in a competitive game of dice and were tested on two traditional false belief stories as well as on several control tasks (verbal intelligence, inhibitory control, and working memory). The frequency of competitive poaching moves in the game correlated with correct predictions of mistaken actions in the false belief task. Hierarchical linear regression after controlling for age and control variables showed that false belief understanding significantly predicted the amount of poaching moves. The results speak for an interrelated development of the capacity for “instrumental” and “telic” perspective taking. They are discussed in the light of teleology as opposed to theory use and simulation

    Food availability outweighs ocean acidification effects in juvenileMytilus edulis: laboratory and field experiments

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    Ocean acidification is expected to decrease calcification rates of bivalves. Nevertheless in many coastal areas high pCO2 variability is encountered already today. Kiel Fjord (Western Baltic Sea) is a brackish (12-20 g kg-1) and CO2 enriched habitat, but the blue mussel Mytilus edulis dominates the benthic community. In a coupled field and laboratory study we examined the annual pCO2 variability in this habitat and the combined effects of elevated pCO2 and food availability on juvenile M. edulis growth and calcification. In the laboratory experiment, mussel growth and calcification were found to chiefly depend on food supply, with only minor impacts of pCO2 up to 3350 ÎŒatm. Kiel Fjord was characterized by strong seasonal pCO2 variability. During summer, maximal pCO2 values of 2500 ÎŒatm were observed at the surface and >3000 ÎŒatm at the bottom. However, the field growth experiment revealed seven times higher growth and calcification rates of M. edulis at a high pCO2 inner fjord field station (mean pCO2 ca. 1000 ÎŒatm) in comparison to a low pCO2 outer fjord station (ca. 600 ÎŒatm). In addition, mussels were able to outcompete the barnacle Amphibalanus improvisus at the high pCO2 site. High mussel productivity at the inner fjord site was enabled by higher particulate organic carbon concentrations. Kiel Fjord is highly impacted by eutrophication, which causes bottom water hypoxia and consequently high seawater pCO2. At the same time, elevated nutrient concentrations increase the energy availability for filter feeding organisms such as mussels. Thus M. edulis can dominate over a seemingly more acidification resistant species such as A. improvisus. We conclude that benthic stages of M. edulis tolerate high ambient pCO2 when food supply is abundant and that important habitat characteristics such as species interactions and energy availability need to be considered to predict species vulnerability to ocean acidification
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