Extra-curricular activities in secondary schools

Thesis (M.A.)--Boston Universit

Applying coupon-collecting theory to computer-aided assessments

Computer-based tests with randomly generated questions allow a large number of different tests to be generated. Given a fixed number of alternatives for each question, the number of tests that need to be generated before all possible questions have appeared is surprisingly low.Comment: 19 pages; bibliographic information added as follows. To appear in Bingham, N. H., and Goldie, C. M. (eds), Probability and Mathematical Genetics: Papers in Honour of Sir John Kingman. London Math. Soc. Lecture Note Series. Cambridge: Cambridge Univ. Pres

A computational approach to arteriolar bifurcations: evaluation of factors influencing predicted wall shear stress

Recent studies of blood flow regulation at the microcirculatory level have linked the physical characteristics of the arteriolar bifurcations and the physiology of the flow through them to the autoregulatory mechanisms exhibited by the endothelial cell lining. Research in this area is decomposed to the following two components: understanding the biochemical activity that takes place at the cellular level as a result of flow-induced stimulation and characterizing the physical flow behavior causing the stimulation. The following study develops the currently accepted method of characterizing the physical flow behavior, in the form of wall shear stress, through computational analysis. The goal of this research was to improve the computational methodology used for arterial blood flow analysis to predict and characterize wall shear stress. In doing so, all factors introduced by the modeling techniques were analyzed for influence on predicted wall shear stress in order to prove the credibility of the methodology. This process also extended to a characterization of wall shear stress effects as a result of changing model geometry and the physical composition of the blood as a particle-laden fluid, which better represent the physical features of these microcirculatory vessels. The thoughts presented in this thesis corresponding to the development and proof of a revised approach for wall shear stress prediction in arteriolar bifurcations provide a consistent method for the development and evaluation of single factors of the realistic model as they relate to wall shear stress. The goal of this approach was to simplify the computational problem into its constituents and evaluate the wall shear stress influence of each on a singular basis

Caught In the Middle: The Challenge of Middle Level Education

There is widespread evidence that a mismatch exists between what middle level schools offer and what 10 to 14 year olds need. More and more of these “early adolescents” are experimenting with drugs and alcohol, becoming pregnant, and dropping out. These issues and the increased incidents of violence at this age cause many parents to view with anxiety their children\u27s transition from the relatively safe elementary school to the unknown, often maligned middle or junior high school. Prospective teachers most often choose not to work in the middle grades because they don’t think they can work with “those kids”. Who are these 10 to 14 year old kids that are caught in the middle, no longer children, but not yet adults? Providing educational programs that best serve their needs is the challenge of middle level education toda

How Sublime (and Prolific) was Byron? What the Reviewers Said

Cet article propose un survol des livres, des articles et des critiques (et lettres) écrits sur Lord Byron et son oeuvre de son vivant et peu de temps après sa mort, soit de 1807 à 1830 environ, de sorte à déterminer à quel point les contemporains de Byron le trouvaient « sublime ». Walter Scott, en faisant le compte rendu de Childe Harold 4, affirmait avec enthousiasme qu’il s’agissait de « la poésie la plus sublime », mais d’autres, comme William Hazlitt, étaient d’avis que « l’auteur de Childe Harold et de Don Juan est… un poseur, encore qu’il soit provoquant et sublime ». En parlant de Don Juan, John Wilson Croker s’exclamait quant à lui : « Quelle sublimité! quelle légèreté! quelle audace! quelle tendresse! quelle majesté! quelle insignifiance! quelle variété! quel ennui!1 ». Ma discussion sur un grand nombre de ces jugements sur l’oeuvre de Byron par ses contemporains nous permettra de determiner si le terme « sublime » définit adéquatement l’esprit de la poésie de Byron, surtout ce « sublime » tel qu’il a été compris par Longin, Burke et d’autres

An analog computer simulation of the flapping of a helicopter hinged main rotor blade

An analog computer simulation was performed on the Systron Donner SD 40/80 electronic differential analyzer consisting of one panel (SD 40) less three modules augmented by three digital logic modules for iterative operation. The flapping equation was solved in continuous iteration for various values of blade mass and the resultant blade flapping magnitudes and harmonic coefficients were compared in computer plots of the blade tip path plane. A flap compensator was added and the result plotted. Various aerodynamic parameters of the flapping equation solution were plotted --Abstract, page ii