Dropping the Ball: The Failure of the NCAA To Address Concussions in College Football

Part I of this Note will examine the medical history of concussions, and the growing link between concussions suffered by football players and the development of long-term head injuries. Part II will discuss factors that exacerbate the concussion problem in football, as well as examine how the head injury issue is being addressed by the NCAA, the National Football League (NFL), and state legislatures. Part III will examine the NCAA’s duty to protect student-athlete safety in light of the ongoing litigation against the NCAA, specifically the potential scope of legal liability for head injuries. Part IV will focus on what steps the NCAA can and should take to address the concussion issue, as well as the issue’s potential threat to college football in its current form if the NCAA refuses to adapt to the latest scientific discoveries about the long-term consequences of repeated head injuries

The underground city: the tourism potential of water and sewage infrastructure: the example of Poland

Industrial tourism and technical facilities are a fast-growing branch of tourism that contains areas of great growth potential. The article deals with one of them. The tourist potential of water and sewage infrastructure in selected Polish cities was analysed and assessed. The study covered 11 cities of diverse socio-economic potentials around the country. For each city, data were collected that had various levels of detail with regard to visitor numbers, tourist types, facilities made available, events and other special celebrations. For supplementary data, unstructured interviews were also conducted with relevant employees identified in businesses. The analysis showed the studied form of tourism to have very high tourism potential. The work focuses on factors and features accounting for its currently low level of development. It is also emphasised that, based on current tourism trends, it should be expected to continue to grow rapidly in the coming years, and thus warrants further research

On the cutting edge: Post-translational modifications in cytokinesis

Cytokinesis represents the final stage in the cell cycle, in which two daughter cells, each with their complement of the duplicated genome, physically separate. At the core of this process sits highly conserved machinery responsible for specifying the plane of division, building a contractile apparatus and ultimately cleaving cells in two. Although the \u27parts list\u27 of contributing proteins has been well described, mechanisms by which these parts are spatially and temporally regulated are only beginning to be understood. With advancements in biochemical and proteomic analyses, recent work has uncovered multiple new roles for post-translational modifications in the regulation of cytokinesis. Here, we review these latest findings and interpret our current understanding of cytokinesis in light of relevant modifications. © 2011 Elsevier Ltd

Wird die Sünde von Gott bestraft?

In der vorliegenden Studie unter dem Titel »Wird die Sünde von Gott bestraft?« geht der Verfasser vom Phänomen des Bösen und des Leides in der Welt aus. Er stellt die Frage nach der Beziehung zwischen Leid und Sünde, u. z. ob das Leid Gottesstrafe für die Sünde sei. Dann bringt er verschiedene Lösungsversuche dieses Problems, die im Verlauf der Geschichte gemacht wurden. Von den christlichen Ansichten setzt er sich besonders mit der Satisfaktionstheorie des hl. Anselm mit der Lehre des bekannten Tübinger Professors Karl Adam, mit den Autoren des Holländischen Katechismus und schliesslich mit der Meinung des heute bekannten Theologen J. Ratzinger auseinander. Die Satisfaktionstheorie und die Lehre des Holländischen Katechismus werden als extrem abgelehnt, denn die erste betont zu stark die Notwendigkeit des Leides für die Erlösung, während die zweite Kreuz und Leid in der Erlö-sungslehre ausser Acht lässt. Die Ansichten der Theologen K. Adam und J. Ratzinger werden gegenübergestellt. Der Autor zieht die Interpretation von K. Adam der von J. Ratzinger vor, weil Ratzinger die aufsteigende Linie des Opfers Christi und der Menschen seiner Ansicht nach vernachlässigt. Demgegenüber hebt der Autor gerade diese aufsteigende Linie hervor. Dadurch bekommen das alltägliche Kreuz und vor allem die freiwilligen Bussübungen der Christen, die heutzutage sogar von einigen Theologen unterschätzt werden, ihren echten Wert

Rotational modulation and single g-mode pulsation in the B9pSi star HD 174356?

Chemically peculiar (CP) stars of the upper main sequence are characterized by specific anomalies in the photospheric abundances of some chemical elements. The group of CP2 stars, which encompasses classical Ap and Bp stars, exhibits strictly periodic light, spectral, and spectropolarimetric variations that can be adequately explained by the model of a rigidly rotating star with persistent surface structures and a stable global magnetic field. Using observations from the Kepler K2 mission, we find that the B9pSi star HD 174356 displays a light curve variable in both amplitude and shape, which is not expected in a CP2 star. Employing archival and new photometric and spectroscopic observations, we carry out a detailed abundance analysis of HD 174356 and discuss its photometric and astrophysical properties in detail. We employ phenomenological modelling to decompose the light curve and the observed radial velocity variability. Our abundance analysis confirms that HD 174356 is a silicon-type CP2 star. No magnetic field stronger than 110 G was found. The star's light curve can be interpreted as the sum of two independent strictly periodic signals with and. The periods have remained stable over 17 yr of observations. In all spectra, HD 174356 appears to be single-lined. From the simulation of the variability characteristics and investigation of stars in the close angular vicinity, we put forth the hypothesis that the peculiar light variability of HD 174356 arises in a single star and is caused by rotational modulation due to surface abundance patches (P1) and g-mode pulsation (P2).Fil: Mikulaek, Z. Masaryk University; República ChecaFil: Paunzen, E.. Masaryk University; República ChecaFil: Hümmerich, S.. Masaryk University; República ChecaFil: Niemczura, E.. University of Wrocław; PoloniaFil: Walczak, P.. University of Wrocław; PoloniaFil: Fraga, L.. Masaryk University; República ChecaFil: Bernhard, K.. American Association of Variable Star Observers ; Estados UnidosFil: Janik, J.. Masaryk University; República ChecaFil: Hubrig, S.. Leibniz-Institut für Astrophysik Potsdam; AlemaniaFil: Järvinen, S.. Masaryk University; República ChecaFil: Jagelka, M.. Leibniz Institute For Astrophysics Potsdam; AlemaniaFil: Pintado, Olga Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina. Universidad San Pablo Tucumán; ArgentinaFil: Krticka, J.. Masaryk University; República ChecaFil: Prisegen, M.. Masaryk University; República ChecaFil: Skarka, M.. Masaryk University; República ChecaFil: Zejda, M.. Masaryk University; República ChecaFil: Ilyin, I.. Leibniz-Institut für Astrophysik Potsdam; AlemaniaFil: Pribulla, T.. Masaryk University; República ChecaFil: Kaminski, K.. Adam Mickiewicz University; PoloniaFil: Kaminska, M. K.. Adam Mickiewicz University; PoloniaFil: Tokarek, J.. Adam Mickiewicz University; PoloniaFil: Zielinski, P.. Astronomical Observatory University of Warsaw; Poloni

Ceftazidime: pharmacokinetics in young volunteers versus elderly patients and therapeutic efficacy with complicated urinary tract infections

Thirty-six urological patients (21 male, 15 female) aged 21 to 83 years with complicated and/or hospital-acquired urinary tract infections due to sensitive bacteria were treated with ceftazidime intravenously with a daily dose of 2 g bd over 5 to 17 days. Twenty-seven patients were followed for 1 to 4 weeks after therapy. Cure was observed in 41%, reinfection in 33% and relapse in 26% of the patients. Eradication of the original pathogen occurred in 74%. Five patients showed minor side effects: diarrhoea (2), nausea (1), rash (1), headache (1). No signs of renal, hepatic or haematological toxicity were observed. A pharmacokinetic study was performed in 13 elderly patients aged 63 to 83 years on day 1 of treatment and in 6 volunteers aged 24 to 32 years following administration of 2 g of ceftazidime as short intravenous infusion. The mean serum half life in 12 patients 2.9 h significantly higher than in volunteers (1.75 h). Serum concentrations in patients on day 7 of treatment, however, showed no accumulation when treated with a dosage of 2 g bd

Students' epistemological framing in quantum mechanics problem solving

Students' difficulties in quantum mechanics may be the result of unproductive framing and not a fundamental inability to solve the problems or misconceptions about physics content. We observed groups of students solving quantum mechanics problems in an upper-division physics course. Using the lens of epistemological framing, we investigated four frames in our observational data: algorithmic math, conceptual math, algorithmic physics, and conceptual physics. We discuss the characteristics of each frame as well as causes for transitions between different frames, arguing that productive problem solving may occur in any frame as long as students' transition appropriately between frames. Our work extends epistemological framing theory on how students frame discussions in upper-division physics courses.Comment: Submitted to Physical Review -- Physics Education Researc