6,998 research outputs found

    Lessons for Co-management: Experiences from the Fisheries Management Science Programme (FMSP)

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    The aim of this document is to communicate lessons for fisheries co-management that have emerged from a series of projects undertaken by the DFID Fisheries Management Science Programme (FMSP). It focuses on three examples of FMSP projects: ParFish, Adaptive learning and designing data collection systems. This document does not aim to give a comprehensive overview of co-management but seeks to provide a viewpoint based on the experiences of the FMSP projects in question. This document is targeted to fisheries decision makers, managers and facilitators including government, industry and non-governmental organisations

    Improvement of the Fairbanks Atmospheric Carbon Monoxide Transport Model -- A Program for Calibration, Verification and Implementation

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    Completion Report Prepared for the Research Section, Alaska Department of Transportation and Public FacilitiesIn the early 70s, state, local and federal officials in Fairbanks, Alaska, became concerned with the rising incidence of high carbon monoxide episodes. Because of that concern, the Alaska Department of Highways (forerunner of the Department of Transportation and Public Facilities) and the Fairbanks North Star Borough requested that the Institute of Water Resources undertake a study to develop a computer model capability for understanding the transport of carbon monoxide and other pollutants within the Fairbanks airshed. The work was completed in June of 1976. Two publications (Carlson and Fox, 1976; Norton and Carlson, 1976) describe the initial development, documentation and implementation of the computer model. The model, ACOSP (Atmospheric Carbon monOxide Simulation Program), describes the two-dimensional behavior of pollutants in the atmosphere via solution of the convection-diffusion equation using the finite element method of numerical analysis

    Evaluation of reliability modeling tools for advanced fault tolerant systems

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    The Computer Aided Reliability Estimation (CARE III) and Automated Reliability Interactice Estimation System (ARIES 82) reliability tools for application to advanced fault tolerance aerospace systems were evaluated. To determine reliability modeling requirements, the evaluation focused on the Draper Laboratories' Advanced Information Processing System (AIPS) architecture as an example architecture for fault tolerance aerospace systems. Advantages and limitations were identified for each reliability evaluation tool. The CARE III program was designed primarily for analyzing ultrareliable flight control systems. The ARIES 82 program's primary use was to support university research and teaching. Both CARE III and ARIES 82 were not suited for determining the reliability of complex nodal networks of the type used to interconnect processing sites in the AIPS architecture. It was concluded that ARIES was not suitable for modeling advanced fault tolerant systems. It was further concluded that subject to some limitations (the difficulty in modeling systems with unpowered spare modules, systems where equipment maintenance must be considered, systems where failure depends on the sequence in which faults occurred, and systems where multiple faults greater than a double near coincident faults must be considered), CARE III is best suited for evaluating the reliability of advanced tolerant systems for air transport

    Fixing Advising: A Model for Faculty Advising

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    This paper addresses mandates to fix the advising process with a focus on faculty advising systems. Measures of student success and satisfaction, administrative issues, and faculty concerns are among the many factors discussed. Regression analysis is used to explore long-voiced faculty complaints that students do not follow advice. A case study is used to illustrate changes in one department’s advising process and measures of student satisfaction are reported. A model of advising components is offered to illustrate practices suggested to realize the full potential of the advising process

    Effects of Thermal Discharge Upon a Subarctic Stream: Completion Report

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    The work upon which this report is based was supported in part by funds provided by the United States Department of Interior, Office of Water Research and Technology (Project B-020-ALAS), as authorized by the Water Resources Research Act of 1964, Public Law 88-279, as amended; in part by funds provided by the Municipal Utility System of the City of Fairbanks, Alaska; and in part by funds provided by the University of Alaska, Fairbanks

    Preparing for an Aging Nation: The Need for Academic Geriatricians

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    According to the author of this issue brief, a strong commitment by the government to a regular stream of financial support for geriatrics would encourage medical centers to establish or expand programs, enhance their ability to attract funds from private sources, and ultimately produce a sufficient number of academic geriatricians. Given the impending retirement of the baby boom generation, this process should begin as soon as possible. This issue brief highlights the critical need for academic geriatricians and presents a realistic proposal to help address the problem

    A fault injection experiment using the AIRLAB Diagnostic Emulation Facility

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    The preparation for, conduct of, and results of a simulation based fault injection experiment conducted using the AIRLAB Diagnostic Emulation facilities is described. An objective of this experiment was to determine the effectiveness of the diagnostic self-test sequences used to uncover latent faults in a logic network providing the key fault tolerance features for a flight control computer. Another objective was to develop methods, tools, and techniques for conducting the experiment. More than 1600 faults were injected into a logic gate level model of the Data Communicator/Interstage (C/I). For each fault injected, diagnostic self-test sequences consisting of over 300 test vectors were supplied to the C/I model as inputs. For each test vector within a test sequence, the outputs from the C/I model were compared to the outputs of a fault free C/I. If the outputs differed, the fault was considered detectable for the given test vector. These results were then analyzed to determine the effectiveness of some test sequences. The results established coverage of selt-test diagnostics, identified areas in the C/I logic where the tests did not locate faults, and suggest fault latency reduction opportunities

    Lifting classes for the fixed point theory of nn-valued maps

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    The theory of lifting classes and the Reidemeister number of single-valued maps of a finite polyhedron XX is extended to nn-valued maps by replacing liftings to universal covering spaces by liftings with codomain an orbit configuration space, a structure recently introduced by Xicot\'encatl. The liftings of an nn-valued map ff split into self-maps of the universal covering space of XX that we call lift-factors. An equivalence relation is defined on the lift-factors of ff and the number of equivalence classes is the Reidemeister number of ff. The fixed point classes of ff are the projections of the fixed point sets of the lift-factors and are the same as those of Schirmer. An equivalence relation is defined on the fundamental group of XX such that the number of equivalence classes equals the Reidemeister number. We prove that if XX is a manifold of dimension at least three, then algebraically the orbit configuration space approach is the same as one utilizing the universal covering space. The Jiang subgroup is extended to nn-valued maps as a subgroup of the group of covering transformations of the orbit configuration space and used to find conditions under which the Nielsen number of an nn-valued map equals its Reidemeister number. If an nn-valued map splits into nn single-valued maps, then its nn-valued Reidemeister number is the sum of their Reidemeister numbers.Comment: near complete rewrite from previous versio
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