Zombies: a simple discrete model of the apocalypse

A simple discrete-time two-dimensional dynamical system is constructed and analyzed numerically, with modelling motivations drawn from the zombie virus of popular horror fiction, and with suggestions for further exercises or extensions suitable for an introductory undergraduate course

Zombies: a simple discrete model of the apocalypse

A simple discrete-time two-dimensional dynamical system is constructed and analyzed numerically, with modelling motivations drawn from the zombie virus of popular horror fiction, and with suggestions for further exercises or extensions suitable for an introductory undergraduate course

Epidemiologic features of upper gastrointestinal tract cancers in Northeastern Iran

Previous studies have shown that oesophageal and gastric cancers are the most common causes of cancer death in the Golestan Province, Iran. In 2001, we established Atrak Clinic, a referral clinic for gastrointestinal (GI) diseases in Gonbad, the major city of eastern Golestan, which has permitted, for the first time in this region, endoscopic localisation and histologic examination of upper GI cancers. Among the initial 682 patients seen at Atrak Clinic, 370 were confirmed historically to have cancer, including 223 (60) oesophageal squamous cell cancers (ESCC), 22 (6) oesophageal adenocarcinomas (EAC), 58 (16) gastric cardia adenocarcinomas (GCA), and 58 (16) gastric noncardia adenocarcinomas. The proportional occurrence of these four main site-cell type subdivisions of upper GI cancers in Golestan is similar to that seen in Linxian, China, another area of high ESCC incidence, and is markedly different from the current proportions in many Western countries. Questioning of patients about exposure to some known and suspected risk factors for squamous cell oesophageal cancer confirmed a negligible history of consumption of alcohol, little use of cigarettes or nass (tobacco, lime and ash), and a low intake of opium, suggesting that the high rates of ESCC seen in northeastern Iran must have other important risk factors that remain speculative or unknown. Further studies are needed to define more precisely the patterns of upper GI cancer incidence, to test other previously suspected risk factors, and to find new significant risk factors in this high-risk area. © 2004 Cancer Research UK

Global and extended global Hessenberg processes for solving Sylvester tensor equation with low-rank right-hand side

In this paper, we introduce two new schemes based on the global Hessen-berg processes for computing approximate solutions to low-rank Sylvester tensor equations. We first construct bases for the matrix and extended matrix Krylov subspaces by applying the global and extended global Hes-senberg processes. Then the initial problem is projected into the matrix or extended matrix Krylov subspaces with small dimensions. The reduced Sylvester tensor equation obtained by the projection methods can be solved by using a recursive blocked algorithm. Furthermore, we present the upper bounds for the residual tensors without requiring the computation of the approximate solutions in any iteration. Finally, we illustrate the perfor-mance of the proposed methods with some numerical examples

Drug Use as Boundary Play: A Qualitative Exploration of Gay Circuit Parties

Research findings have revealed that gay circuit parties may be locations that are disproportionately responsible for the increasing rates of many STIs/HIV among gay/bisexual men. Theories have been put forth that this may be the case because circuit parties are locales of prevalent drug use and unsafe sex. To explore the relationship between these two phenomena, in-depth qualitative interviews were undertaken with 17 men who (1) have sex with other men, (2) attended gay circuit parties in Montréal, Canada, in 2007. These revealed that drugs (including alcohol) were used intentionally to engage in unsafe sex, and then to justify this behavior after the fact. This process we called boundary play

Liver, spleen, pancreas and kidney involvement by human fascioliasis: imaging findings

BACKGROUND: Fasciola hepatica primarily involves the liver, however in some exceptional situations other organs have been reported to be involved. The ectopic involvement is either a result of Parasite migration or perhaps eosinophilic reaction. CASE PRESENTATION: Here we report a known case of multiple myeloma who was under treatment with prednisolone and melphalan. He was infected by Fasciola hepatica, which involved many organs and the lesions were mistaken with metastatic ones. DISCUSSION: Presented here is a very unusual case of the disease, likely the first case involving the pancreas, spleen, and kidney, as well as the liver

Inclusive ideologies and passive performances: Exploring masculinities and attitudes toward gay peers among boys in an elite youth football academy

Drawing on data generated from semi-structured, one-to-one interviews in 2012, this article focuses on the attitudinal disposition toward homosexuality of 12 English academy level football players aged 14-15. Results highlight the presence of progressive attitudes toward homosexuality even though some of the youth feel they lack the agency to contest homophobia when espoused in their schools. Using a blend of two dominating masculinities theories we use these interviews to highlight that boys in this setting are best understood as a complex imbrication of inclusivity yet socially-passive acceptance. We suggest that boys of this age are now primed for learning agency to contest the social marginalisation of others