Evaluation of the Anchorage Coordinated Agency Network (CANS) Program

In spring 1999, the Anchorage Police Department and the Alaska Division of Juvenile Justice formed a partnership to enhance the supervision and services provided to juvenile probationers in Anchorage. Modeled after a successful program in San Diego, California, the Anchorage Coordinated Agency Network (CANS) project extended the supervision arm of the youth probation office by having Anchorage police officers make random visits to juvenile probationers. This evaluation examines the CANS program during its pilot phase, June through December 1999. The evaluation assesses whether juveniles participating in the CANS program differed from a control group of non-CANS participants with respect to new probation violations and new offenses. An effort is also made to determine the most important factors predicting program outcomes.Anchorage Police Department Alaska Division of Juvenile JusticeIntroduction / Program Overview / Related Literature / Methodology / Analysis / Summary & Discussion / Reference

Geometry of isophote curves

In this paper, we consider the intensity surface of a 2D image, we study the evolution of the symmetry sets (and medial axes) of 1-parameter families of iso-intensity curves. This extends the investigation done on 1-parameter families of smooth plane curves (Bruce and Giblin, Giblin and Kimia, etc.) to the general case when the family of curves includes a singular member, as will happen if the curves are obtained by taking plane sections of a smooth surface, at the moment when the plane becomes tangent to the surface. Looking at those surface sections as isophote curves, of the pixel values of an image embedded in the real plane, this allows us to propose to combine object representation using a skeleton or symmetry set representation and the appearance modelling by representing image information as a collection of medial representations for the level-sets of an image.Comment: 15 pages, 7 figure

Spacetime Slices and Surfaces of Revolution

Under certain conditions, a $(1+1)$-dimensional slice $\hat{g}$ of a spherically symmetric black hole spacetime can be equivariantly embedded in $(2+1)$-dimensional Minkowski space. The embedding depends on a real parameter that corresponds physically to the surface gravity $\kappa$ of the black hole horizon. Under conditions that turn out to be closely related, a real surface that possesses rotational symmetry can be equivariantly embedded in 3-dimensional Euclidean space. The embedding does not obviously depend on a parameter. However, the Gaussian curvature is given by a simple formula: If the metric is written $g = \phi(r)^{-1} dr^2 + \phi(r) d\theta^2$, then \K_g=-{1/2}\phi''(r). This note shows that metrics $g$ and $\hat{g}$ occur in dual pairs, and that the embeddings described above are orthogonal facets of a single phenomenon. In particular, the metrics and their respective embeddings differ by a Wick rotation that preserves the ambient symmetry. Consequently, the embedding of $g$ depends on a real parameter. The ambient space is not smooth, and $\kappa$ is inversely proportional to the cone angle at the axis of rotation. Further, the Gaussian curvature of $\hat{g}$ is given by a simple formula that seems not to be widely known.Comment: 15 pages, added reference

Species of Bursaphelenchus Fuchs, 1937 (Nematoda: Parasitaphelenchidae) and other nematode genera associated with insects from Pinus pinaster in Portugal

Insects associated with maritime pine, Pinus pinaster, in Portugal were collected and screened for the presence of Bursaphelenchus species. Nematodes were identified using Internal Transcribed Spacers-Restriction Fragment Length Polymorphism (ITS-RFLP) analysis of dauer juveniles and morphological identification of adults that developed from dauer juveniles on fungal cultures or on cultures in pine wood segments at 26 C. Several associations are described: Bursaphelenchus teratospicularis and Bursaphelenchus sexdentati are associated with Orthotomicus erosus; Bursaphelenchus tusciae, B. sexdentati and/or Bursaphelenchus pinophilus with Hylurgus ligniperda and Bursaphelenchus hellenicus with Tomicus piniperda, Ips sexdentatus and H. ligniperda. An unidentified Bursaphelenchus species is vectored by Hylobius sp. The previously reported association of Bursaphelenchus xylophilus with Monochamus galloprovincialis was confirmed. The association of Bursaphelenchus leoni with Pityogenes sp. is not definitively established and needs further studies for clarification. Other nematode genera besides Bursaphelenchus were found to be associated with the insects sampled, including two different species of Ektaphelenchus, Parasitorhabditis sp., Parasitaphelenchus sp., Contortylenchus sp. and other unidentified nematodes. The Ektaphelenchus species found in O. erosus is morphologically similar to B. teratospicularis found in the same insect; adults of both the species are found in cocoon-like structures under the elytra of the insects. Introduction Approximately one third of the nematodes belonging to the order Aphelenchida Siddiqi, 1980 are associated with insects (Poinar, 1983). These nematodes establish a variety of associations with the insects, which may be described as commensalism, e.g. phoresy (to the benefit of the nematode but not affecting the insect), mutualism (both the organisms benefit) or parasitism (nematodes benefit at the expense of the insect) (Giblin-Davis, 2004). Most Bursaphelenchus Fuchs, 1937 species are mycetophagous, feeding on fungi in the galleries of bark beetles and thu

Mental skills training in sprinting

The Science of Sport: Sprinting examines the scientific principles that underpin the preparation and performance of athletics at all levels, from grassroots to Olympic competition. Drawing on the expertise of some of the world's leading coaches and sport science professionals, the book presents a detailed analysis of the latest evidence and explores the ways in which science has influenced, and subsequently improved, the sport of sprinting. By providing an overview of the principles of sport science and how these are applied in practice, the book is essential reading for students and academics, coaches and performers, physiotherapists, club doctors and professional support staff

Global and EU Agricultural Trade Reform: What is in it for Tanzania, Uganda and Sub-Saharan Africia?

This paper uses the ATPSM partial equilibrium trade model (developed by UNCTAD and the FAO) to examine the impact of various agricultural trade liberalisation scenarios on the countries of Sub-Saharan Africa. The model is presented in some detail along with an assessment of some of its strengths and limitations. Two types of trade policy liberalisation scenario are simulated. The first is a set of benchmark total unilateral agricultural trade liberalisation scenarios - by the EU, other regions of the world, Sub-Saharan Africa and our two individual case study countries Tanzania and Uganda. These benchmark simulations give an idea of the potential welfare effects from trade reform. The second set of simulations covers different trade reform proposals that have been put forward in the context of the Doha Development Round. The paper focuses in particular on the Harbinson proposal. Results are reported for total welfare changes as well as more disaggregated welfare impacts on producers, consumers, and government revenue. Changes in export volume and value, and changes in quota rent from preferential trade agreements are also reported. The findings for Tanzania and Uganda are that the welfare effects of rich-country agricultural trade reform are small and typically modestly negative. This reflects both their trade balance in agricultural goods and the erosion in the value of some preferences in the case of Tanzania. Liberalisation by the countries themselves generates the biggest, albeit still small, total welfare gains but at the cost of lost government revenue and significant losses in welfare for net-agricultural producers in rural areas where most of the poor live. The paper is an important contribution in moving beyond the aggregate results for Sub-Saharan Africa that are typically presented in trade simulation papers on agricultural liberalisation, aggregates which include a significant diversity of contrasting individual country impacts.agriculture, trade, modelling, sub-Saharan Africa

The Wigner caustic on shell and singularities of odd functions

We study the Wigner caustic on shell of a Lagrangian submanifold L of affine symplectic space. We present the physical motivation for studying singularities of the Wigner caustic on shell and present its mathematical definition in terms of a generating family. Because such a generating family is an odd deformation of an odd function, we study simple singularities in the category of odd functions and their odd versal deformations, applying these results to classify the singularities of the Wigner caustic on shell, interpreting these singularities in terms of the local geometry of L.Comment: 24 page