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Search Results: 1 - 10 of 10360 matches for " Karl Sarah "
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Theorising knowledge practices: a missing piece of the educational technology puzzle
Sarah Howard,Karl Maton
Research in Learning Technology , 2011, DOI: 10.3402/rlt.v19i3.17109
Abstract: Educational technology research has been characterised as lacking theoreticalframeworks that can enable cumulative knowledge-building across the field.This article explores the value of Legitimation Code Theory (LCT) for addressingthese issues by discussing research into the key question of integration ofinformation and communication technologies in education. Specifically, it showshow LCT enables the theorisation of knowledge practices, the basis of educationbut undertheorised by existing research. Drawing on a major study of a technologicalinitiative in all state secondary schools in New South Wales, Australia,the article illustratively uses one dimension of LCT to compare the organisingprinciples underlying the initiative with those underlying the key subjects ofmathematics and English. Analysis suggests that a ‘code clash' with mathematicsand a ‘code match' with English might help explain their different patternsof integration of information and communication technologies. It also demonstrateshow LCT can be utilised with multiple methods, enabling the integrationof research into a wide range of educational topics and thereby contributingtowards building knowledge across the field.
Understanding the Scourge of HIV/AIDS in Sub-Saharan Africa
Inungu Joseph,Karl Sarah
Journal of the International AIDS Society , 2006, DOI: 10.1186/1758-2652-8-4-30
Abstract: Sub-Saharan Africa is the part of the world that has been hit hardest by the HIV epidemic. To fight the spread of HIV in the continent, it is necessary to know and effectively address the factors that drive the spread of HIV. The purpose of this article is to review the factors associated with the spread of the HIV epidemic in sub-Saharan Africa and to propose 6 essential activities, which we refer to by the acronym "ESCAPER," to help curb the spread of HIV/AIDS in Africa.
Random permutations and unique fully supported ergodicity for the Euler adic transformation
Sarah Bailey Frick,Karl Petersen
Statistics , 2007,
Abstract: There is only one fully supported ergodic invariant probability measure for the adic transformation on the space of infinite paths in the graph that underlies the Eulerian numbers. This result may partially justify a frequent assumption about the equidistribution of random permutations.
Academic Support Services in U.S. and Canadian Medical Schools
Norma S. Saks, EdD,Sarah Karl, PhD
Medical Education Online , 2004,
Abstract: Background: Academic support services play a critical but largely undocumented role in helping medical students meet the challenges of the curriculum. Purpose: To determine the prevalence of academic support programs in medical schools, and to find out how these are conceptualized and implemented. Methods: Questionnaires were sent to medical schools in the US and Canada. Questions addressed specific services, providers, and funding. Results: The survey was returned by 86 of the 135 (67.7%) schools. Almost all (95.3%) provide academic support in the first two years, and a large majority in third (82.6%) and fourth (79%) year. Great variability exists in the infrastructure and funding of the programs, and in the training of the providers. Conclusions: Academic support is common, but has broad interpretation; services are varied. Programs are conceptualized differently, some to provide specific assistance to pass courses, and others for skill development, to enhance self-directed, life-long learning.
Dynamical properties of some adic systems with arbitrary orderings
Sarah Frick,Karl Petersen,Sandi Shields
Mathematics , 2015,
Abstract: We consider arbitrary orderings of the edges entering each vertex of the (downward directed) Pascal graph. Each ordering determines an adic (Bratteli-Vershik) system, with a transformation that is defined on most of the space of infinite paths that begin at the root. We prove that for every ordering the coding of orbits according to the partition of the path space determined by the first three edges is essentially faithful, meaning that it is one-to-one on a set of paths that has full measure for every fully supported invariant probability measure. We also show that for every $k$ the subshift that arises from coding orbits according to the first $k$ edges is topologically weakly mixing. We give a necessary and sufficient condition for any adic system to be topologically conjugate to an odometer and use this condition to determine the probability that a random order on a fixed diagram, or a diagram constructed at random in some way, is topologically conjugate to an odometer. We also show that the closure of the union over all orderings of the subshifts arising from codings of the Pascal adic by the first edge has superpolynomial complexity, is not topologically transitive, and has no periodic points besides the two fixed points, while the intersection over all orderings consists of just four orbits.
Are most of the VHE gamma-ray unidentified sources relic PWNe?
Omar Tibolla,Michael Vorster,Sarah Kaufmann,Stefan Ferreira,Karl Mannheim
Physics , 2013,
Abstract: The evolution of Pulsar Wind Nebulae (PWNe) plays a crucial role in interpreting the very high energy (VHE; > 10^11 eV) gamma-ray unidentified sources; and moreover it represents the only viable option to explain the discovery of several "dark sources" in the TeV gamma-ray (i.e. VHE gamma-ray sources without lower energies, radio or X-ray counterparts). The newest time-dependent modeling of PWNe presented in [1] and [2] has to be tested on a broader sample of young well-known PWNe and applied to the full-sample of "dark sources". The consequences of this interpretation go far beyond the interpretation of "dark sources": e.g. there could be strong implication in the origin of cosmic rays and (when considering a leptonic origin of the gamma-ray signal) they can be important for reinterpreting the detection of starburst galaxies in the TeV gamma-ray band.
Ergodicity of the adic transformation on the Euler graph
Sarah Bailey,Michael Keane,Karl Petersen,Ibrahim Salama
Mathematics , 2006, DOI: 10.1017/S0305004106009431
Abstract: The Euler graph has vertices labelled (n,k) for n=0,1,2,... and k=0,1,...,n, with k+1 edges from (n,k) to (n+1,k) and n-k+1 edges from (n,k) to (n+1,k+1). The number of paths from (0,0) to (n,k) is the Eulerian number A(n,k), the number of permutations of 1,2,...,n+1 with exactly n-k falls and k rises. We prove that the adic (Bratteli-Vershik) transformation on the space of infinite paths in this graph is ergodic with respect to the symmetric measure.
Congenital Central Hypothyroidism due to a Homozygous Mutation in the TSHβ Subunit Gene
Sarah Catharina Grünert,Miriam Schmidts,Joachim Pohlenz,Matthias Volkmar Kopp,Markus Uhl,Karl Otfried Schwab
Case Reports in Pediatrics , 2011, DOI: 10.1155/2011/369871
Abstract: Congenital central hypothyroidism (CCH) is a rare condition occurring in 1 : 20000 to 1 : 50000 newborns. As TSH plasma levels are low, CCH is usually not detected by TSH-based neonatal screening for hypothyroidism, and, as a result, diagnosis is often delayed putting affected children at risk for developmental delay and growth failure. We report on a girl with isolated central hypothyroidism due to a homozygous one-base pair deletion (T313del) in exon 3 of the TSHβ subunit gene. The molecular genetic and typical radiologic findings are discussed, and a systematic diagnostic workup for congenital central hypothyroidism is proposed. Physicians need to be aware of this rare condition to avoid diagnostic delay and to install prompt replacement therapy.
Bell’s Theorem and Instantaneous Influences at a Distance  [PDF]
Karl Hess
Journal of Modern Physics (JMP) , 2018, DOI: 10.4236/jmp.2018.98099
Abstract: An explicit model-example is presented to simulate Einstein-Podolsky-Rosen (EPR) experiments without invoking instantaneous influences at a distance. The model-example, together with the interpretation of past experiments by Kwiat and coworkers, uncovers logical inconsistencies in the application of Bell’s theorem to actual EPR experiments. The inconsistencies originate from topological-combinatorial assumptions that are both necessary and sufficient to derive all Bell-type inequalities including those of Wigner-d’Espagnat and Clauser-Horne-Shimony-Holt. The model-example circumvents these inconsistencies.
Using Metaphors to Aid Student Meta-Learning: When You’re Learning at Your Best Your Like What?  [PDF]
Sarah Nixon
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.47A2006

Metaphors are widely discussed within educational research and this paper adds to the body of knowledge in relation to students using these as a tool to support meta-learning. Metaphors free up space for creative thinking by moving the mind from one place to another and have been found to be an effective cognitive device for learning. This project focuses on what students are like when they are “learning at their best” and discusses what knowing this information does for both individual self-awareness and working with others. Six final year students spent half a day exploring, developing and pictorially representing their “learning at best” metaphors. All six metaphors were different and showed the internal representations of the individuals when they were learning at their best. However out of the discourse common themes arose from the group in relation to what was needed to support learning these included time of day, mood, pace and environment. All six students were positive that the development of personal learning metaphors was beneficial and thought that it was important that these were developed systematically over time. The benefits were highlighted to be both for the individual working on their own and for understanding others in group work situations.

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