The Playeur and Pokémon Go: Examining the effects of locative play on spatiality and sociability

Pokémon Go is a hugely popular hybrid reality game (HRG) that enables players to occupy a space that is simultaneously physical and digital. The general aim of Pokémon Go is to discover and then capture Pokémon. This article reports on an original research project designed to explore the impact of Pokémon Go on spatiality and sociability. The project was conducted between May 2017 and July 2017, using an online survey which received 375 responses from users of Pokémon Go geographically spread across the globe. Drawing on the concept of the ‘playeur’ as an established approach to understanding the effects of locative play on spatiality and sociability, this research follows three lines of enquiry. First, the research examines whether the intermingling of play and ordinary life might encourage players to spend more time outside in public spaces, and how this mode of play is experienced. Second, the research explores whether the game mechanics of Pokémon Go might lead players to traverse their environment using modified routes, as well as frequent new places. Third, the research examines whether the praxis of Pokémon Go might enable new forms of sociability to emerge that extend beyond earlier HRGs

Distribution and toxicity of Cylindrospermopsis raciborskii (Cyanobacteria) in Portuguese freshwaters

The cyanobacterium Cylindrospermopsis racborskii has become increasingly prevalent in freshwaters worldwide. This species is of concern from a water quality perspective due to its known ability to produce a potent hepatotoxic alkaloid cylindrospermopsin, which has been implicated in outbreaks of human sickness and cattle mortality. C. raciborskii isolates from Brazil have also been found to produce the highly toxic paralytic shellfish poisons (PSP's). In this paper we report the toxicity of four isolates of C. raciborskii taken from three reservoirs and one river in Portugal as well as the occurrence of this species in other water bodies used for potable and recreational purposes. All four isolates grown in pure culture in the laboratory were found to be toxic in the mouse bioassay at 8 - 24 hours after intraperitoneal administration of single doses ranging from 1337 to 1572 mg kg-1. Histological examination showed liver damage as the primary lesion, in addition to some inflammation in the intestine. HPLC/MS tests for the presence of cylindrospermopsin, microcystins and PSP toxins were negative. The available evidence suggests that another toxin may be present. This report constitutes the first report of toxic C. raciborskii in Europe and draws attention to our need for increased monitoring of this cyanobacterium in water bodies used for potable and recreational purposes.La cianobacteria Cylindrospermopsis racborskii ha incrementado su presencia en agua dulce por todo el mundo. Esta especie es de gran importancia debido a su conocida capacidad para producir un alcaloide hepatotóxico, cilindrospermopsina. Esta toxina es responsable de enfermedades en humanos y mortalidad en ganado. Cepas de C. raciborskii aisladas de Brasil se ha demostrado que tienen capacidad para producir la toxina paralytic shellfish poisons (PSP's). En este trabajo hemos estudiado la presencia de esta especie en agua dulce con usos recreacionales y de abastecimiento en Portugal. De las cuatro cepas C. raciborskii aisladas de tres embalses y de un río estudiamos la toxicidad con bioensayos en ratones. Todas presentaron toxicidad al cabo de las 8 - 24 horas tras inyección intraperitoneal, la dosis presenta un rango de concentración de 1337 a 1572 mg kg-1. La examinación histológica reveló daños en el hígado y señales inflamatorias en el intestino. Los análisis con HPLC/MS revelaron la ausencia de cilindrospermopsina, microcistinas y PSP, sugiriendo que otra toxina podría estar presente para las cepas aisladas y cultivadas en laboratorio. Este artículo es el primero acerca de la toxicidad de C. raciborskii en Europa y refleja la necesidad de aumentar el monitoreo de esta cyanobacteria en el agua potable y con fines recreativos

Stellar parameters and chemical abundances of 223 evolved stars with and without planets

We present fundamental stellar parameters and chemical abundances for a sample of 86 evolved stars with planets and for a control sample of 137 stars without planets. The analysis was based on both high S/N and resolution echelle spectra. The goals of this work are i) to investigate chemical differences between stars with and without planets; ii) to explore potential differences between the properties of the planets around giants and subgiants; and iii) to search for possible correlations between these properties and the chemical abundances of their host stars. In agreement with previous studies, we find that subgiants with planets are, on average, more metal-rich than subgiants without planets by ~ 0.16 dex. The [Fe/H] distribution of giants with planets is centered at slightly subsolar metallicities and there is no metallicity enhancement relative to the [Fe/H] distribution of giants without planets. Furthermore, contrary to recent results, we do not find any clear difference between the metallicity distributions of stars with and without planets for giants with M > 1.5 Msun. With regard to the other chemical elements, the analysis of the [X/Fe] distributions shows differences between giants with and without planets for some elements, particularly V, Co, and Ba. Analyzing the planet properties, some interesting trends might be emerging: i) multi-planet systems around evolved stars show a slight metallicity enhancement compared with single-planet systems; ii) planets with a $\lesssim$ 0.5 AU orbit subgiants with [Fe/H] > 0 and giants hosting planets with a $\lesssim$ 1 AU have [Fe/H] < 0; iii) higher-mass planets tend to orbit more metal-poor giants with M < 1.5 Msun, whereas planets around subgiants seem to follow the planet-mass metallicity trend observed on dwarf hosts; iv) planets orbiting giants show lower orbital eccentricities than those orbiting subgiants and dwarfs.Comment: 49 pages, 31 figures, Accepted for publication in A&A, abstract shortened - corrected references, typos, acknowledgements include

Behavior of solutions of a third-order dynamic equation on time scales

In this paper, we will establish some sufficient conditions which guarantee that every solution of the third-order nonlinear dynamic equatio

Benign paroxysmal positional vertigo after radiologic scanning: a case series

<p>Abstract</p> <p>Introduction</p> <p>Benign paroxysmal positional vertigo (BPPV) is the most common type of vertigo. It is frequently seen in elderly patients, and the course of the attack may easily mimic cerebrovascular disease. A BPPV attack after a radiologic examination has not been reported previously. We report the cases of two patients who had BPPV attacks after radiologic imaging.</p> <p>Case presentation</p> <p>The first patient with headache and tremor was admitted to the radiology department for cranial computed tomography (CT) imaging. During scanning, she was asked to lie in the supine position with no other head movements for approximately 10 minutes. After the cranial CT imaging, she stood up rapidly, and suddenly experienced a vertigo attack and nausea. The second patient was admitted to the radiology department for evaluation of his renal arteries. During the renal magnetic resonance angiography, he was in the supine position for 20 minutes and asked not to move. After the examination, he stood up rapidly with the help of the technician and suddenly experienced a vertigo attack with nausea and vomiting. The results of standard laboratory analyses and their neurologic examinations were within normal limits and Dix-Hallpike tests showed rotatory nystagmus in both cases. An Epley maneuver was performed to the patients. The results of a control Dix-Hallpike tests after 1 Epley maneuver were negative in both patients.</p> <p>Conclusion</p> <p>Radiologists and clinicians must keep in mind that after radiologic imaging in which the patient is still for some time in the supine position and then helped to stand up rapidly, a BPPV attack may occur.</p

Mobile Augmented Reality and Language-Related Episodes

Applications of locative media (e.g., place‐based mobile augmented reality [AR]) are used in various educational content areas and have been shown to provide learners with valuable opportunities for investigation‐based learning, location‐situated social and collaborative interaction, and embodied experience of place (Squire, 2009; Thorne & Hellermann, 2017; Zheng et al., 2018). Mobile locative media applications’ value for language learning, however, remains underinvestigated. To address this lacuna, this study employed the widely used construct of language‐related episodes (LREs; Swain & Lapkin, 1998) as a unit of analysis to investigate language learning through participation in a mobile AR game. Analysis of videorecorded interactions of four mixed‐proficiency groups of game players (two English language learners [ELLs] and one expert speaker of English [ESE] per group) indicates that LREs in this environment were focused on lexical items relevant to the AR tasks and physical locations. Informed by sociocultural theory and conversation analysis, the microgenesis of learners’ understanding and subsequent use of certain lexical items are indicated in the findings. This understanding of new lexical items was frequently facilitated by ESEs’ assistance and the surrounding physical environment. A strong goal orientation by both ESEs and ELLs was visible, providing implications for task‐based language teaching approaches

Everyday life and locative play: an exploration of Foursquare and playful engagements with space and place

Foursquare is a location-based social network (LBSN) that combines gaming elements with features conventionally associated with social networking sites (SNSs). Following two qualitative studies, this article sets out to explore what impact this overlaying of physical environments with play has on everyday life and experiences of space and place. Drawing on early understandings of play, alongside the flâneur and ‘phoneur’ as respective methods for conceptualizing play in the context of mobility and urbanity, this article examines whether the suggested division between play and ordinary life is challenged by Foursquare, and if so, how this reframing of play is experienced. Second, this article investigates what effect this LBSN has on mobility choices and spatial relationships. Finally, the novel concept of the ‘phoneur’ is posited as a way of understanding how pervasive play through LBSNs acts as a mediating influence on the experience of space and place