5,614 research outputs found
The child, the text and the teacher: reading primers and reading instruction
From the late sixteenth century, in response to the problem of how best to teach children to read, a variety of texts such as primers, spellers and readers were produced in England for vernacular instruction. This paper describes how these materials were used by teachers to develop first, a specific religious understanding according to the stricture of the time and second, a moral reading practice that provided the child with a guide to secular conduct. The analysis focuses on the use of these texts as a productive means for shaping the child-reader in the context of newly emerging educational spaces which fostered a particular, morally formative relation among teacher, child and text
Control of a human-powered helicopter in hover
The study of a control system for the Da Vinci 2 human-powered helicopter in hovering flight is documented. This helicopter has two very large, slowly rotating rotor blades and is considered to be unstable in hover. The control system is designed to introduce stability in hover by maintaining level rotors through the use of rotor tip mounted control surfaces. A five degree of freedom kinematic model was developed to study this control system and is documented. Results of this study show that the unaugmented configuration is unstable due to the large Lock Number, and the augmented configuration is stable. The role of NASA in this study included the development and analysis of the kinematic model and control laws. Both analytical and numerical techniques were used
A monoclonal antibody that blocks the activity of a neurite regeneration-promoting factor: studies on the binding site and its localization in vivo
Work from several laboratories has identified a proteoglycan complex secreted by a variety of non-neuronal cells that can promote neurite regeneration when applied to the surface of culture dishes. Using a novel immunization protocol, a monoclonal antibody (INO) was produced that blocks the activity of this outgrowth-promoting factor (Matthew, W. D., and P. H. Patterson, 1983, Cold Spring Harbor Symp. Quant. Biol. 48:625-631). We have used the antibody to analyze the components of the active site and to localize the complex in vivo. INO binding is lost when the complex is dissociated; if its components are selectively reassociated, INO binds only to a complex containing two different molecular weight species. These are likely to be laminin and heparan sulfate proteoglycan, respectively. On frozen sections of adult rat tissues, INO binding is present on the surfaces of glial cells of the peripheral, but not the central, nervous system. INO also binds to the basement membrane surrounding cardiac and skeletal muscle cells, and binding to the latter greatly increases after denervation. In the adrenal gland and kidney, INO selectively reacts with areas rich in basement membranes, staining a subset of structures that are immunoreactive for both laminin and heparan sulfate proteoglycan. In general, the outgrowth-blocking antibody binds to areas known to promote axonal regeneration and is absent from areas known to lack this ability. This suggests that this complex, which is active in culture, may be the physiological substrate supporting nerve regeneration in vivo
Effect of location of aft-mounted nacelles on the longitudinal aerodynamic characteristics of a high-wing transport airplane
As part of a propulsion/airframe integration program at Langley Research Center, tests were conducted in the Langley 16-Foot Transonic Tunnel to determine the effects of locating flow-through mixed flow engine nacelles in several aft underwing positions on the longitudinal aerodynamics of a high wing transport airplane. D-shaped inlet nacelles were used in the test. Some configurations with antishock bodies and with nacelle toe-in were also tested. Data were obtained for a free stream Mach number range of 0.70 to 0.85 and a model angle-of-attack range from -2.5 to 4.0 degrees
Bankruptcy prediction in the casino industry
An exploratory study of the effectiveness of traditional bankruptcy prediction models as applied to the casino industry. The study uses financial information from a sample of failed and non-failed casino companies to evaluate the ability of bankruptcy prediction models developed for general industry usage to predict financial failure in the casino industry; The models tested were the ones developed by Edward I. Altman, Edward B. Deakin and Christine V. Zavgren. The financial information utilized in the study was limited to that which could be obtained from publicly available information sources. The sample size was limited to the number of failed firms for which information was available and an equal number of non-failed firms; The study showed that traditional bankruptcy prediction models did not significantly enhance the ability to predict business failure in the casino industry beyond a random fail/no-fail prediction
Democratic Counterinsurgents: How Democracies Can Prevail in Irregular Warfare
This dissertation answers the question of whether or not democracies can win counterinsurgency conflicts. This is done first through an analysis of the arguments made by those who claim that democracies are uniquely incapable of doing so due to various limitations imposed by public opinion as well as the arguments of those who argue that democracies can win such conflicts given the correct strategy. Secondly, the question is investigated through an examination of three case studies: Malaysia, Vietnam, and Iraq. This analysis demonstrates that the arguments against the ability of democracies to win counterinsurgencies is not as strong as many scholars currently believe. Secondly, this research demonstrates that a population-based, culturally-informed, counterinsurgency strategy provides a plausible avenue of victory for democratic states faced with insurgencies. Though such a strategy cannot guarantee success, the more closely it is followed the more likely success will be
The High School Principal\u27s Role in the Guidance Program and the Services Provided to the Principal by the Guidance Counselor
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