3,297 research outputs found

    Trends in fatal car-occupant accidents

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    A Statewide Survey of School Counselors’ Perceptions on School Issues

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    School counselors maintain a unique professional role in a school setting. This article explores the perceptions of 255 school counselors in the State of Michigan on three contemporary school counseling issues: (a) pre-service training, (b) the professional role of counselors, and (c) school- related issues, related to the professional role of counselors. The results found no differences based on age among school counselors regarding school issues, while gender differences were found on three school issues. The results suggest that on certain issues, school counselors continue to be challenged with role ambiguity

    Suspending Lefschetz fibrations, with an application to Local Mirror Symmetry

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    We consider the suspension operation on Lefschetz fibrations, which takes p(x) to p(x)-y^2. This leaves the Fukaya category of the fibration invariant, and changes the category of the fibre (or more precisely, the subcategory consisting of a basis of vanishing cycles) in a specific way. As an application, we prove part of Homological Mirror Symmetry for the total spaces of canonical bundles over toric del Pezzo surfaces.Comment: v2: slightly expanded expositio

    Knowledge of and attitudes to sports drinks of adolescents living in South Wales, UK

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    Background: The UK sports drinks market has a turnover in excess of £200M. Adolescents consume 15.6% of total energy as free sugars, much higher than the recommended 5%. Sugar sweetened beverages, including sports drinks, account for 30% of total free sugar intake for those aged 11-18 years. Objective: To investigate children’s knowledge and attitudes surrounding sports drinks. Method: 183 self-complete questionnaires were distributed to four schools in South Wales. Children aged 12 - 14 were recruited to take part. Questions focussed on knowledge of who sports drinks are aimed at; the role of sports drinks in physical activity and the possible detrimental effects to oral health. Recognition of brand logo and sports ambassadors and the relationship of knowledge to respondent’s consumption of sports drinks were assessed. Results: There was an 87% (160) response rate. 89.4% (143) claimed to drink sports drinks. 45.9% thought that sports drinks were aimed at everyone; approximately a third (50) viewed teenagers as the target group. Over 2/3rds recognised the brand logos, yet less than a 1/3rd could identify brand ambassadors. About half were aware that dental erosion may result from consumption and approximately 2/3rds knew that they were linked to dental caries and energy provision. Despite this the majority claimed to drink them. As previously reported most of those drinking sports drinks did so because of the taste. Conclusion: Whilst most of the respondents had some understanding of the detrimental effects on health the majority of them were drinking them regularly despite this knowledge. Work is therefore needed at a macro level, with soft drink manufacturers, to consider marketing and reformulation of products for adolescent consumers who appear to enjoy them

    On the multiplicity of the hyperelliptic integrals

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    Let I(t)=∟Ύ(t)ωI(t)= \oint_{\delta(t)} \omega be an Abelian integral, where H=y2−xn+1+P(x)H=y^2-x^{n+1}+P(x) is a hyperelliptic polynomial of Morse type, ÎŽ(t)\delta(t) a horizontal family of cycles in the curves {H=t}\{H=t\}, and ω\omega a polynomial 1-form in the variables xx and yy. We provide an upper bound on the multiplicity of I(t)I(t), away from the critical values of HH. Namely: $ord\ I(t) \leq n-1+\frac{n(n-1)}{2}if if \deg \omega <\deg H=n+1.Thereasoninggoesasfollows:weconsidertheanalyticcurveparameterizedbytheintegralsalong. The reasoning goes as follows: we consider the analytic curve parameterized by the integrals along \delta(t)ofthe of the n‘‘Petrovâ€Čâ€Čformsof ``Petrov'' forms of H(polynomial1−formsthatfreelygeneratethemoduleofrelativecohomologyof (polynomial 1-forms that freely generate the module of relative cohomology of H),andinterpretthemultiplicityof), and interpret the multiplicity of I(t)astheorderofcontactof as the order of contact of \gamma(t)andalinearhyperplaneof and a linear hyperplane of \textbf C^ n.UsingthePicard−Fuchssystemsatisfiedby. Using the Picard-Fuchs system satisfied by \gamma(t),weestablishanalgebraicidentityinvolvingthewronskiandeterminantoftheintegralsoftheoriginalform, we establish an algebraic identity involving the wronskian determinant of the integrals of the original form \omegaalongabasisofthehomologyofthegenericfiberof along a basis of the homology of the generic fiber of H.Thelatterwronskianisanalyzedthroughthisidentity,whichyieldstheestimateonthemultiplicityof. The latter wronskian is analyzed through this identity, which yields the estimate on the multiplicity of I(t).Still,insomecases,relatedtothegeometryatinfinityofthecurves. Still, in some cases, related to the geometry at infinity of the curves \{H=t\} \subseteq \textbf C^2,thewronskianoccurstobezeroidentically.Inthisalternativeweshowhowtoadapttheargumenttoasystemofsmallerrank,andgetanontrivialwronskian.Foraform, the wronskian occurs to be zero identically. In this alternative we show how to adapt the argument to a system of smaller rank, and get a nontrivial wronskian. For a form \omegaofarbitrarydegree,weareledtoestimatingtheorderofcontactbetween of arbitrary degree, we are led to estimating the order of contact between \gamma(t)andasuitablealgebraichypersurfacein and a suitable algebraic hypersurface in \textbf C^{n+1}.Weobservethat. We observe that ord I(t)growslikeanaffinefunctionwithrespectto grows like an affine function with respect to \deg \omega$.Comment: 18 page

    Profiling Phospholipids within Atlantic Salmon Salmo salar with Regards to a Novel Terrestrial Omega-3 Oil Source

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    The development and inclusion of novel oils derived from genetically modified (GM) oilseeds into aquafeeds, to supplement and supplant current terrestrial oilseeds, as well as fish oils, warrants a more thorough investigation into lipid biochemical alterations within finfish species, such as Atlantic salmon. Five tissues were examined across two harvesting timepoints to establish whether lipid isomeric alterations could be detected between a standard commercial diet versus a diet that incorporated the long-chain polyunsaturated fatty acids (LC-PUFA), EPA (eicosapentaenoic acid), and DHA (docosahexaenoic acid), derived from the GM oilseed Camelina sativa. Tissue-dependent trends were detected, indicating that certain organs, such as the brain, have a basal limit to LC-PUFA incorporation, though enrichment of these fatty acids is possible. Lipid acyl alterations, as well as putative stereospecific numbering (sn) isomer alterations, were also detected, providing evidence that GM oils may modify lipid structure, with lipids of interest providing a set of targeted markers by which lipid alterations can be monitored across various novel diets

    Tame Functions with strongly isolated singularities at infinity: a tame version of a Parusinski's Theorem

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    Let f be a definable function, enough differentiable. Under the condition of having strongly isolated singularities at infinity at a regular value c we give a sufficient condition expressed in terms of the total absolute curvature function to ensure the local triviality of the function f over a neighbourhood of c and doing so providing the tame version of Parusinski's Theorem on complex polynomials with isolated singularities at infinity.Comment: 20 page

    AtlantOS plankton report: Based on observations from the Continuous Plankton Recorder Survey

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    Early and late results of surgery for Wolff-Parkinson-White syndrome

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    Surgical treatment for accessory atrioventricular connections was performed in 60 patients with Wolff-Parkinson-White syndrome between 1981 and 1986. The initial procedure successfully divided 69 of 73 pathways identified preoperatively, including 39 of 40 left free wall pathways, 23 of 24 posteroseptal pathways, six of seven right free wall pathways, and one of two anteroseptal pathways. Three additional pathways were identified for the first time during follow-up. The primary procedure was successful in curing 53 (88%) of the 60 patients and in dividing 69 (91%) of the total of 76 pathways. Subsequent procedures increased the overall clinical cure rate to 97%. The surgery was performed with low morbidity and no perioperative or late mortality. Patients were followed-up for a mean of 6.4 years (range four to nine years). No patient showed clinical or electrocardiographic evidence of recurrence of a pathway which had been divided surgically. We conclude that regardless of pathway site, surgical treatment carries a low risk and has a high probability of avoiding lifelong antiarrhythmic therapy.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/75341/1/j.1445-5994.1991.tb04698.x.pd
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