1,496 research outputs found
The Value of Information in Invasive Species Management
Resource /Energy Economics and Policy,
Valuing Monitoring Networks for Invasive Species: The Case of Soybean Rust
Crop Production/Industries,
PROVIDING EQUITABLE SPATIAL DISTRIBUTION OF PROTECTED NATURAL AREAS IN A METROPOLITAN SETTING: AN APPLICATION OF THE LOCATION SET-COVERING PROBLEM
We use the location set covering problem to define a natural area site selection model for use in the Chicago region. This framework allows us to explicitly consider the equity of site distribution by stipulating that each population center has access to a recreational space within a specified distance.Land Economics/Use,
EXPLORING GOAL TRADEOFFS IN METROPOLITAN NATURAL AREA PROTECTION
This study examines the issue of natural area protection in an urban environment. We report on the results of interviews conducted with a wide range of land use planners in the Chicago region. Of particular interest are the unique goals and challenges of land acquisition programs in a metropolitan area.Resource /Energy Economics and Policy,
The Galam Model of Minority Opinion Spreading and the Marriage Gap
In 2002, Serge Galam designed a model of a minority opinion spreading. The
effect is expected to lead a conservative minority to prevail if the issue is
discussed long enough. Here we analyze the marriage gap, i.e. the difference in
voting for Bush and Kerry in 2004 between married and unmarried people. It
seems possible to interpret this marriage gap in terms of the Galam model.Comment: 6 page
Saturation of a spin 1/2 particle by generalized Local control
We show how to apply a generalization of Local control design to the problem
of saturation of a spin 1/2 particle by magnetic fields in Nuclear Magnetic
Resonance. The generalization of local or Lyapunov control arises from the fact
that the derivative of the Lyapunov function does not depend explicitly on the
control field. The second derivative is used to determine the local control
field. We compare the efficiency of this approach with respect to the
time-optimal solution which has been recently derived using geometric methods.Comment: 12 pages, 4 figures, submitted to new journal of physics (2011
Longitudinal Peer Network Data in Higher Education
This chapter employs a longitudinal social network approach to research small group teaching in higher education. Longitudinal social network analyses can provide in-depth understanding of the social dynamics in small groups. Specifically, it is possible to investigate and disentangle the processes by which students make or break social connections with peers and are influenced by them, as well as how those processes relate to group compositions and personal attributes, such as achievement level. With advanced methods for modelling longitudinal social networks, researchers can identify social processes affecting small group teaching and learning
Group Formation
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68807/2/10.1177_104649647300400206.pd
Attitudes Toward Organizational Change among Public Middle Managers
Positive attitudes toward change (PATC) are an important current issue in public
organizations facing profound financial and managerial reforms. This study aims to
identify social and organizational antecedents of PATC. The investigated population
is composed of middle managers working in Swiss public hospitals (N = 720), which
are currently being confronted by major reforms. Partial mediation effects of
organizational commitment (OC) in the relationships between independent variables
and PATC are also controlled. The findings show that perceived social support (work
relationships with colleagues and supervisors) as well as perceived organizational
support (employee voice and participation, information and communication, work-life
balance) are positively and significantly related to PATC. Stress perception is shown
to have a negative impact on PATC. This article provides valuable contributions with
respect to antecedents of attitudes toward change in a population of public middle
managers
Instabilities and robust control in natural resource management
Most renewable natural resources exhibit marked demographic and environmental stochasticities, which are exarcebated in management decisions by the uncertainty regarding the choice of an appropriate model to describe system dynamics. Moreover, demand and supply analysis often indicates the presence of instabilities and multiple equilibria, which may lead to management problems that are intensified by uncertainty on the evolution of the resource stock. In this paper the fishery management problem is used as an example to explore the potential of robust optimal control, where the objective is to choose a harvesting rule that will work under a range of admissible specifications for the stock-recruitment equation. The paper derives robust harvesting rules leading to a unique equilibrium, which could be helpful in the design of policy instruments such as robust quota systems.info:eu-repo/semantics/publishedVersio
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