The role of handouts, note-taking and overhead transparencies in veterinary science lectures

Objective To study student and staff views of the role and use of handouts, note-taking and overhead transparencies in veterinary science lectures at the University of Queensland Methods The Nominal Group Technique was used to help develop a questionnaire, which was completed by 351 students (a response rate of 84%) and 35 staff (76%) from the 5 years of the veterinary course. The data were analysed using the SAS statistical computer package. Results Staff and students held different views as to the frequency with which handouts should be used, their educational value, and whether they should be complete or partial. Fewer students than staff agreed that handouts discourage further reading in a subject. Almost all staff and students saw the central functions of note-taking to be provision of notes for subsequent revision and encoding information given by the lecturer. More students than staff however, considered that note-taking in lectures interferes with understanding. Staff and students held similar views as to the uses of overheads in lectures. Interestingly however, more staff than students agreed that overheads often contain too much information. Conclusion Both students and staff saw the central role of note-taking as providing a set of good notes for revision. Generally students preferred that this information be provided in the form of partial or complete handouts, while staff preferred students to take notes and to read outside lectures. Surprisingly, more staff than students felt that overhead transparencies often contained too much information. Note-taking, handouts and overhead transparencies need to be linked in a coherent educational strategy to promote effective learning.

Coexistence of stability and mobility in postural control: evidence from postural compensation for respiration

This study evaluated the extent to which movement of the lower limbs and pelvis may compensate for the disturbance to posture that results from respiratory movement of the thorax and abdomen. Motion of the neck, pelvis, leg and centre of pressure (COP) were recorded with high resolution in conjunction with electromyographic activity (EMG) of flexor and extensor muscles of the trunk and hip. Respiration was measured from ribcage motion. Subjects breathed quietly, and with increased volume due to hypercapnoca (as a result of breathing with increased dead-space) and a voluntary increase in respiration. Additional recordings were made during apnoea. The relationship between respiration and other parameters was measured from the correlation between data in the frequency domain (i.e. coherence) and from time-locked averages triggered from respiration. In quiet standing, small angular displacements (similar to0.5degrees) of the trunk and leg were identified in raw data. Correspondingly, there were peaks in the power spectra of the angular movements and EMG. While body movement and EMG were coherent with respiration (>0.5), the coherence between respiration and COP displacement was low (

Diversity and change in Australia's rangelands: a post-productivist transition with a difference?

Australia's rangelands are experiencing a post-productivist transition at a tempo comparable to Western Europe's, but in contexts that ensure marked divergence in impulses, actors, processes and outcomes. In Australia's most marginal lands, a flimsy mode of pastoral occupance is being displaced by renewed indigenous occupance, conservation and tourism, with significant changes in land ownership, property rights, investment sources and power relations, but also with structural problems arising from fugitive income streams. The sharp delineation between structurally coherent commodity-oriented regions and emerging amenity-oriented regions can provisionally be mapped at a national scale. A comparison of Australia with Western Europe indicates that three distinct but interconnected driving forces are propelling the rural transition, namely: agricultural overcapacity; the emergence of amenity-oriented uses; and changing societal values.

Spatial and temporal patterns in Australian wheat yield and their relationship with ENSO

Spatial and temporal variability in wheat production in Australia is dominated by rainfall occurrence. The length of historical production records is inadequate, however, to analyse spatial and temporal patterns conclusively. In this study we used modelling and simulation to identify key spatial patterns in Australian wheat yield, identify groups of years in the historical record in which spatial patterns were similar, and examine association of those wheat yield year groups with indicators of the El Nino Southern Oscillation (ENSO). A simple stress index model was trained on 19 years of Australian Bureau of Statistics shire yield data (1975-93). The model was then used to simulate shire yield from 1901 to 1999 for all wheat-producing shires. Principal components analysis was used to determine the dominating spatial relationships in wheat yield among shires. Six major components of spatial variability were found. Five of these represented near spatially independent zones across the Australian wheatbelt that demonstrated coherent temporal (annual) variability in wheat yield. A second orthogonal component was required to explain the temporal variation in New South Wales. The principal component scores were used to identify high- and low-yielding years in each zone. Year type groupings identified in this way were tested for association with indicators of ENSO. Significant associations were found for all zones in the Australian wheatbelt. Associations were as strong or stronger when ENSO indicators preceding the wheat season (April-May phases of the Southern Oscillation Index) were used rather than indicators based on classification during the wheat season. Although this association suggests an obvious role for seasonal climate forecasting in national wheat crop forecasting, the discriminatory power of the ENSO indicators, although significant, was not strong. By examining the historical years forming the wheat yield analog sets within each zone, it may be possible to identify novel climate system or ocean-atmosphere features that may be causal and, hence, most useful in improving seasonal forecasting schemes.

Ecological responses to recent climate change

There is now ample evidence of the ecological impacts of recent climate change, from polar terrestrial to tropical marine environments. The responses of both flora and fauna span an array of ecosystems and organizational hierarchies, from the species to the community levels. Despite continued uncertainty as to community and ecosystem trajectories under global change, our review exposes a coherent pattern of ecological change across systems. Although we are only at an early stage in the projected trends of global warming, ecological responses to recent climate change are already clearly visible.

Improving the ionic conductivity of yttria-stabilised zirconia electrolyte materials

Low-temperature anneals (1200 degreesC for 40 h) of 8 mol% yttria-stabilised zirconia, prior to the samples being sintered at 1500 degreesC, had the effect of improving the ionic conductivity of the specimens. The presence Of SiO2 in the specimens was shown to be detrimental, however. Irrespective of the SiO2 content, this type of heat treatment also leads to improvements in conductivity. Extensive microstructural analysis provided indication of the mechanism of this phenomenon. This included selective formation of zircon, relief of sintering strain leading to the formation of coherent grain boundaries and segregation effects. (C) 2002 Elsevier Science B.V All rights reserved.

Exact results for a tunnel-coupled pair of trapped Bose-Einstein condensates

A model describing coherent quantum tunnelling between two trapped Bose-Einstein condensates is discussed. It is not well known that the model admits an exact solution, obtained some time ago, with the energy spectrum derived through the algebraic Bethe ansatz. An asymptotic analysis of the Bethe ansatz equations leads us to explicit expressions for the energies of the ground and the first excited states in the limit of weak tunnelling and all energies for strong tunnelling. The results are used to extract the asymptotic limits of the quantum fluctuations of the boson number difference between the two Bose-Einstein condensates and to characterize the degree of coherence in the system.

Stokes-operator-squeezed continuous-variable polarization states

We investigate nonclassical Stokes-operator variances in continuous-wave polarization-squeezed laser light generated from one and two optical parametric amplifiers. A general expression of how Stokes-operator variances decompose into two-mode quadrature operator variances is given. Stokes parameter variance spectra for four different polarization-squeezed states have been measured and compared with a coherent state. Our measurement results are visualized by three-dimensional Stokes-operator noise volumes mapped on the quantum Poincare sphere. We quantitatively compare the channel capacity of the different continuous-variable polarization states for communication protocols. It is shown that squeezed polarization states provide 33% higher channel capacities than the optimum coherent beam protocol.

Magnetic polarization currents in double quantum dot devices

We investigate coherent electron transport through a parallel circuit of two quantum dots (QDs), each of which has a single tunable. energy level. Electrons tunnelling via each dot from the left lead interfere with each other at the right lead. It is shown that due to the quantum interference of tunnelling electrons the double QD device is magnetically polarized by coherent circulation of electrons on the closed path through the dots and the leads. By varying the energy level of each dot one can make the magnetic states of the device be up-, non- or down-polarized. It is shown that for experimentally accessible temperatures and applied biases the magnetic polarization currents Should be sufficiently large to observe with current nanotechnology.

Sa??de do trabalhador: um (n??o) olhar sobre o servidor p??blico

O presente artigo pretende tecer algumas considera????es a respeito dos discursos e pr??ticas da ??rea da sa??de do trabalhador em rela????o aos trabalhadores dos servi??os p??blicos. Na primeira parte, demarca a constru????o do campo da Sa??de do Trabalhador enquanto pol??tica p??blica no Brasil, identificando como as Confer??ncias Nacionais de Sa??de do Trabalhador trataram o tema da sa??de do servidor p??blico. Em seguida, analisa entrevistas realizadas com profissionais da Per??cia M??dica de um estado brasileiro. Ao final, conclui que a????es voltadas ?? aten????o da sa??de do servidor p??blico n??o integram uma pol??tica p??blica, mas ficam ?? merc?? dos diferentes governos, sendo que os enunciados sobre a sa??de do trabalhador t??m uma fr??gil penetra????o em um campo ainda hegem??nico da medicina do trabalho. A sa??de do servidor p??blico n??o tem merecido investimento, apenas controle, em conson??ncia com um longo hist??rico de desvaloriza????o do setor p??blico.

Sobre as causas naturais que formam a base empírica do fenômeno dos turbilhões nas cosmogonias : dos pré-socráticos a René Descartes

Neste trabalho é apresentado um possível fundamento empírico para as teorias dos turbilhões que figuram em praticamente todas as teorias cosmogônicas dos pré-socráticos e mesmo presentes nas teorias de pensadores modernos como René Descartes e C. Huyghens.

A alfabetização/educação de surdos na história da educação do Espírito Santo

Este trabalho integra um grupo de pesquisas desenvolvidas pela linha de pesquisa Educação e Linguagens, do Programa de Pós-Graduação da Universidade Federal do Espírito Santo. Trata de uma pesquisa histórica que tem por objetivo investigar a história da alfabetização de surdos no Espírito Santo, nas décadas de 1950 a 1970, a partir da tese inicial de que a educação/alfabetização de crianças surdas, no Espírito Santo, nesse período, tinha por finalidade ensinar a língua nacional, por meio da oralização, tendo em vista o projeto desenvolvimentista adotado pelo então Presidente da República, Juscelino Kubistchek. Fundamenta-se nas concepções de Marc Bloch (2001), ao considerar a História como a ciência dos homens no tempo, com o objetivo de compreender a ação humana, de acordo com as condições históricas de sua época, e nas contribuições da concepção bakhtiniana de linguagem, em especial, no conceito de texto como enunciado, considerando que cada texto/documento traz em seu bojo uma história vivida por sujeitos em dado contexto social e histórico. Nessa direção, a partir da análise de documentos escolares, textos jornalísticos, cartilhas, materiais pedagógicos e documentos oficiais, o trabalho se estruturou no sentido de conhecer o contexto nacional que deu origem às primeiras iniciativas de descentralização na educação de surdos, culminando com a criação de salas especiais em vários Estados brasileiros, incluindo o Espírito Santo. As repercussões, em âmbito local, foram analisadas a partir de dois eixos. No primeiro, focalizaram os aspectos políticos, evidenciando que a desresponsabilização do Poder Público facilitou a parceria entre a esfera pública e a esfera privada na configuração das classes especiais, dentro das escolas comuns. No segundo, destacaram que o Método Oral e o Método Perdoncini, que fundamentaram o processo de alfabetização e que tinham como finalidade ensinar a língua oficial do País, na modalidade oral, dialogaram com as concepções pedagógicas e psicológicas da época, tornando o processo claramente escolar. Conclui que o período foi marcado por um projeto educacional consistente e coerente com os postulados da época, tendo na ação responsável e polifônica da professora Álpia Couto-Lenzi a sua principal interlocutora.

Fluxos globais e intra-urbanos : subsídios para seu planejamento em Vitória

One is about a study of the interactions and conflicts between the distinct scales of the flows of the global production and urban mobility on the territory of the city, particularly of Vitória, Espírito Santo. From this analysis of the consequences of the new technologies of the information, of the communication and the transports on the economic and humans relations, if it considers the study of the characteristics of the two layers that act on the territory. Of the scale of the global production, the impacts of the great corporations, its physical nets and its force had been considered as territorial agent in the creation and sponsorship of plans. In the analysis of the place, the intra-urban movements of human displacements e had been considered, mainly the reasons of the trips. From the overlapping of the above-mentioned layers if it looked for to observe the interactions, conflicts and synergies between the layers the intervention in the flows demand of a coherent planning of the atract regions of trips, so that areas with infrastructure lack and services of public transport are not overloaded. Finally, as objective generality, generate with the basis in the interactions found in the overlapping, a list of subsidies for the planning of the urban flows.

Public opinion and foreign policy in João Goulart's Brazil (1961-1964): Coherence between national and foreign policy perceptions?

Abstract This paper analyses public opinion during the João Goulart government in Brazil (1961-1964), focusing on public perceptions on domestic and foreign policies. We employ a recently declassified public opinion survey conducted on behalf of United States Information Agency (USIA) in urban areas. We found that the Brazilian public opinion was somewhat coherent, supporting redistributive reforms domestically and a neutralist approach in foreign affairs.

Application to quantify fetal lung branching on rat explants

Recently, regulating mechanisms of branching morphogenesis of fetal lung rat explants have been an essential tool for molecular research. The development of accurate and reliable segmentation techniques may be essential to improve research outcomes. This work presents an image processing method to measure the perimeter and area of lung branches on fetal rat explants. The algorithm starts by reducing the noise corrupting the image with a pre-processing stage. The outcome is input to a watershed operation that automatically segments the image into primitive regions. Then, an image pixel is selected within the lung explant epithelial, allowing a region growing between neighbouring watershed regions. This growing process is controlled by a statistical distribution of each region. When compared with manual segmentation, the results show the same tendency for lung development. High similarities were harder to obtain in the last two days of culture, due to the increased number of peripheral airway buds and complexity of lung architecture. However, using semiautomatic measurements, the standard deviation was lower and the results between independent researchers were more coherent