41,108 research outputs found

    Transition to Teaching: An Alternative Certification Program through Partnership Between a Public School District and a Public University

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    The reauthorization of the Elementary and Secondary Education Act has had a significant impact on licenses for teachers working in school programs. The act refers to highly qualified teachers in both Title I and Title ll. This paper defines alternative certification programs. This paper then describes a partnership, funded by the US. Department of Education, between a school district and a university to establish an alternative licensure program to train highly qualified secondary mathematics teachers.The goal of this partnership is to provide an infrastructure that supports the recruitment. preparation, placement, induction, and retention of highly qualified teachers through a new alternative route to teacher licensure. In addition, this paper discusses processes and procedures used in the project in light of the literature. lt discusses how candidates were selected for the project, strategies used to meet the competencies for licensure, and assessment of candidates

    Ultrasonic angle beam standard reflector

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    A method that provides an impression profile in a reference standard material utilized in inspecting critically stressed components with pulsed ultrasound is described. A die stamp having an I letter is used to impress the surface of a reference material. The die stamp is placed against the surface and struck with an inertia imparting member to impress the I in the reference standard material. Upset may appear on the surface as a result of the impression and is removed to form a smooth surface. The stamping and upset removal is repeated until the entire surface area of a depth control platform on the die stamp uniformly contacts the material surface. The I impression profile in the reference standard material is utilized for reflecting pulsed ultrasonic beams for inspection purposes

    Langley Research Center Standard for the Evaluation of Socket Welds

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    A specification utilized for the nondestructive evaluation of socket type pipe joints at Langley Research Center (LaRC) is discussed. The scope of hardware shall include, but is not limited to, all common pipe fittings: tees, elbows, couplings, caps, and so forth, socket type flanges, unions, and valves. In addition, the exterior weld of slip on flanges shall be inspected using this specification. At the discretion of the design engineer, standard practice engineer, Fracture Mechanics Engineering Section, Pressure Systems Committee, or other authority, four nondestructive evaluation techniques may be utilized exclusively, or in combination, to inspect socket type welds. These techniques are visual, radiographic, magnetic particle, and dye penetrant. Under special circumstances, other techniques (such as eddy current or ultrasonics) may be required and their application shall be guided by the appropriate sections of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (B&PVC)

    When do Agricultural Exports Help the Rural Poor? A Political-Economy Approach

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    Agricultural exports have been touted by a number of economists as having important potential to alleviate rural poverty, and poverty more generally since much of it is rural, in developing countries. The logic of this view lies in the ideas that (a) many agricultural export products are relatively labour intensive in production and that in many countries the until-recently-prevailing import substitution strategies have penalized agriculture. Moving to a freer trade regime removes the implicit tax on the sector and should loose its growth potential with resulting benefits for workers and small holders. This view, plausible enough from one perspective, flies in the face of much historical evidence that as new agricultural exports become an option, peasant groups are pushed off the lands they previously operated so that large-scale farmers can dedicate it to export use. This process has yielded much conflict and violence, and rather than helping the rural poor has often made them worse off. Predicting whether agricultural exports will help the rural poor thus involves judging whether the reality in a given situation is closer to the first cited model or to the second one. At present fruit and vegetable exports offer hope of strong employment creation in a number of developing countries, though total trade figures suggest that these products cannot by themselves pull up the rural poor in larger developing countries.

    Optiaml Resource Regime in Natural Resource Management: A revised economic theory of commons

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    The economic theory of natural resource management has its roots in the conventional economic theory of commons that overlooked the role of the institutional structures and the associated transaction costs. Hence, it has not been able to explain the outcomes of the cases of successful management of natural resources, such as forests, as common property. The possible economic optimality of community regimes has been recognised in the empirical literature, but it has not yet been incorporated in production models that would help to elucidate the reasons for its relatively superior performance in selected contexts. In this paper, we incorporate institutional structure into a static analysis of optimal resource management regimes which aims to correct this neglect. Resource regime is included as one variable input in natural resource production models that leads to determine global optimum resource regime. The other specific features of this paper are: i) a continuous array of possibilities varying from open access at one extreme to private regime at the other rather than just the two extreme options of state and private regimes; (ii) the socio-economic characteristics of the resource's "user group" as the main determinant of the relative efficiency of different regimes; and (iii) a specific mathematical form for the transaction function, in order to facilitate empirical studies in this area. Static models for general separable and non-separable transformation and transaction functions are discussed. The possibility of different resource regimes being optimal in different socio-economic conditions is highlighted.

    Polarization singularity anisotropy: determining monstardom

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    C points, that is isolated points of circular polarization in transverse fields of varying polarization, are classified morphologically into three distinct types, known as lemons, stars and monstars. These morphologies are interpreted here according to two natural parameters associated with the singularity, namely the anisotropy of the C point, and the polarization azimuth on the anisotropy axis. In addition to providing insight into singularity morphology, this observation applies to the densities of the various morphologies in isotropic random polarization speckle fields.Comment: 3 pages, 2 figures, Optics Letters styl

    On the proximity relation between two surface-melted clusters involved in inter-cluster mass-transfer

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    We explore the way free particles produced by dissociating ``particle-hole pairs'' on a surface-melted cluster can be transferred to a second, nearby surface-melted cluster. This mass transport is based on an inter-cluster direct transfer mechanism of the particles. We found that in this particular case one cluster may grow at the expense of another, obeying a temporal power law with the exponent 1/2 for the average radius R = const t^{1/2}. The change from the expected universal power law R = const t^{1/3} is a consequence of the proximity relation between these two clusters which lead to enhance the effective transport rates.Comment: 8 pages, 1 fig., Eur. Phys. J. D - to appea
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