Classification of maximum hittings by large families

For integers $r$ and $n$, where $n$ is sufficiently large, and for every set $X \subseteq [n]$ we determine the maximal left-compressed intersecting families $\mathcal{A}\subseteq \binom{[n]}{r}$ which achieve maximum hitting with $X$ (i.e. have the most members which intersect $X$). This answers a question of Barber, who extended previous results by Borg to characterise those sets $X$ for which maximum hitting is achieved by the star.Comment: v2: minor corrections in response to reviewer comments. To appear in Graphs and Combinatoric

Combining GPS, GIS, and accelerometry to explore the physical activity and environment relationship in children and young people – a review

The environment has long been associated with physical activity engagement, and recent developments in technology have resulted in the ability to objectively quantify activity behaviours and activity context. This paper reviews studies that have combined Global Positioning Systems (GPS), Geographic Information Systems (GIS) and accelerometry to investigate the PA-environment relationship in children and young people (5–18 years old). Literature searches of the following bibliographic databases were undertaken: Sportdiscus, Medline, Embase, CINAHL, Psychinfo and Applied Social Sciences Index and Abstracts (ASSIA). Fourteen studies met the inclusion criteria, and covered topics including greenspace use, general land use, active travel, and the built environment. Studies were largely cross-sectional and took place across developed countries (UK, USA, Canada, New Zealand, and Australia). Findings suggest that roads and streets, school grounds, and the home location are important locations for total PA, and moderate to vigorous PA (MVPA). The relationship between greenspace was positive, however, multiple definitions and outcome measures add complexity to the results. MVPA was more likely in those exposed to higher levels of greenspace compared to sedentary individuals. Total MVPA time in greenspace is low, but when framed as a proportion of the total can be quite high. Domestic gardens may be an important area for higher intensity activity.<p></p> Researchers are encouraged to show transparency in their methods. As a relatively new area of research, with ever-evolving technology, future work is best placed in developing novel, but robust, methods to investigate the PA and environment relationship. Further descriptive work is encouraged to build on a small but increasing knowledge base; however, longitudinal studies incorporating seasonal/weather variation would also be extremely beneficial to elicit some of the nuances associated with land use. A greater understanding of geographic variation (i.e. within and between countries), as well as urban/suburban and rural dwelling is welcomed, and future work should also include the investigation of psycho-social health as an outcome, as well as differences in socio-economic status, sex and adiposity

Goodness-of-fit tests for the frailty distribution in proportional hazards models with shared frailty.

Frailty models account for the clustering present in grouped event time data. A proportional hazards model with shared frailties expresses the hazard for each subject. Often a one-parameter gamma distribution is assumed for the frailties. The choice of a particular frailty distribution is, most of the time, based on the availability of software, rather than on the way it fits the data. In this paper we construct formal goodness-of-fit tests to test for gamma frailties. We construct a new class of frailty models that extend the gamma frailty model by using certain polynomial expansions that are orthogonal with respect to the gamma density. For this extended family we obtain an explicit expression for the marginal likelihood of the data. The order selection test is based on finding the best fitting model in such a series of expanded models. A bootstrap is used to obtain p-values for the tests. Simulations and data examples illustrate the test's performance.Gamma distribution; Goodness-of-fit test; Frailty model; Order selection test; Orthogonal polynomial;

Screening Modernity: Cinema and Sexuality in Ann-Marie MacDonald's Fall On Your Knees

In Fall on Your Knees, Ann-Marie MacDonald writes early twentieth-century Cape Breton and New York through attention to the popular culture of the era, particularly in aspects of the visual, including paintings, photographs, and films. Just as the female characters trangress boundaries between normative and queer sexuality, so too the text offers an aesthetic queering of the boundaries between representational media. The representations of 1920s film star Louise Brooks, particularly, guide readers to a supplemental set of cultural meanings carried by her image and to a recognition that representation, like history, is always partial."This article was written with the support of a doctoral fellowship from the Fonds pour la Formation de Chercheurs et l’Aide à Recherche (Fonds FCAR)."https://journals.lib.unb.ca/index.php/scl/article/view/12790/1377

Charakter wyspiarski turystyki: przykład Sycylii i Sardynii

Treść artykułu podzielona jest na 4 części, w których autorka omawia kolejno: — specyfikę turyzmu w autonomicznym regionie wyspiarskich Włoch, — sycylijski model turystyki, — sardyński model turystyki, — doświadczenia regionów wyspiarskich w turystyce. Sycylia i Sardynia — mimo położenia na trasie wielkich, śródziemnomorskich potoków turystycznych — pozostają ciągle na uboczu. Głównymi powodami są: dość trudna dostępność, wygórowane ceny, polityka faworyzująca turystykę luksusową etc

The Design of Live Events and Television Students' Moodle Site, Will Changing it Enhance Students' Access?

Study of a specific group of students use of their course Moodle site, analysis of frequency and access experience, to support understanding of further development needs