931 resultados para O57 - Comparative Studies of Countries
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Federal Highway Administration, Washington, D.C.
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Transportation Systems Center, Cambridge, Mass.
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"Contributions from the Zoölogical laboratory of the Museum of comparative zoölogy at Harvard college. E. L. Mark, director. no. 199."
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"This book is, to considerable extent, the translation of my work in Spanish"-Author's note.
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Thesis (Master's)--University of Washington, 2016-06
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Background: Recent research addressing evidence from functional neuroimaging studies, neurophysiological research, and new advances in neuropsychology together with traditional cerebellar lesion studies have recently implicated the cerebellum in adult language and cognitive functions. However, more limited information is currently available in describing the functional connectivity present in the paediatric population. Aims: It is the purpose of this paper to review recent clinical research pertaining to paediatric populations, outlining the impact of site of lesion and specific associated clinical changes in children with cerebellar disturbances. Main contribution: The specific contribution of the right cerebellar hemisphere to language function is identified to also exist in the paediatric population, highlighting the existence of functional connections between this region of the brain and left frontal cortical areas early in development. Conclusions: Implications for future research in paediatric populations are extensive, as a greater awareness and an understanding of the recently acknowledged involvement of the cerebellum in cognition and nonmotor linguistic function is anticipated to also add new dimension and direction to the analysis of childhood language outcomes associated with the cerebellum.
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two studies, pneumococcal polysaccharide (Pnc PS) vaccine was given to more than 400 pregnant Papua New Guinean women. No deleterious effects were found. The vaccine prevented acute lower respiratory infection (ALRI) among offspring in utero or aged 1-17 months at the time of maternal immunisation, suggesting protection through breast feeding. Serum IgG antibody titres were higher in vaccinated than unvaccinated groups for 2-4 months after delivery and no immune suppression, evaluated by the response to subsequent Pnc PS vaccination, was detected. Breast milk IgA to four serotypes was 1.1-1.8 times higher in immunised than unimmunised women for 6 months postpartum. Given results from several developing countries, large-scale safety and efficacy trials are now justified. Postpartum maternal immunisation is another intervention under consideration. (C) 2003 Elsevier Science Ltd. All rights reserved.
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Microscopic traffic-simulation tools are increasingly being applied to evaluate the impacts of a wide variety of intelligent transport, systems (ITS) applications and other dynamic problems that are difficult to solve using traditional analytical models. The accuracy of a traffic-simulation system depends highly on the quality of the traffic-flow model at its core, with the two main critical components being the car-following and lane-changing models. This paper presents findings from a comparative evaluation of car-following behavior in a number of traffic simulators [advanced interactive microscopic simulator for urban and nonurban networks (AIMSUN), parallel microscopic simulation (PARAMICS), and Verkehr in Statiten-simulation (VISSIM)]. The car-following algorithms used in these simulators have been developed from a variety of theoretical backgrounds and are reported to have been calibrated on a number of different data sets. Very few independent studies have attempted to evaluate the performance of the underlying algorithms based on the same data set. The results reported in this study are based on a car-following experiment that used instrumented vehicles to record the speed and relative distance between follower and leader vehicles on a one-lane road. The experiment was replicated in each tool and the simulated car-following behavior was compared to the field data using a number of error tests. The results showed lower error values for the Gipps-based models implemented in AIMSUN and similar error values for the psychophysical spacing models used in VISSIM and PARAMICS. A qualitative drift and goal-seeking behavior test, which essentially shows how the distance headway between leader and follower vehicles should oscillate around a stable distance, also confirmed the findings.
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Data from diverse studies endorse ideas that short term torpor and hibernation are expressions of ancient characters. In evolutionary terms, their basic mechanisms are probably plesiomorphic (= ancestral/primitive) and physiologically similar. This contrasts with the alternate view that they are apomorphic (= derived, specialized), arising independently in many taxa from homeothermic ancestry by numerous apparent convergences. This paper explores some of the implications of accepting the plesiomorphic interpretation. Hibernation is, of course, a complex phenomenon that has undergone variations and refinements in different mammalian lineages. The argument is not that hibernation in total is a plesiomorphic character, but that it is built upon fundamental processes that are. Taking this view provides a framework for research that emphasizes the value of comparative studies, particularly of reptiles and birds. Studies of reptiles, for example, might unravel the mystery about periodic arousals. A plesiomorphic framework also explains the most extreme examples of hibernation as derived specializations from ancestry in which heterothermy is more about energy management than escape from cold. It cautions against using low body temperature (Tb) alone to diagnose torpor, emphasizes the need to distinguish between constitutional eurythermy (plesiomorphic) and constitutional stenothermy (apomorphic), and leads to a parsimonious theory about the evolution of endothermy. The paper proposes that brown adipose tissue (BAT) is apomorphic within eutheria and highlights the conundrum posed by the occurrence of both nonshivering thermogenesis (NST) and rapid arousal from hibernation in noneutherian mammals that lack BAT and uncoupling protein 1 (UCP1). It endorses the likely existence of a different, ancient and widespread mechanism for regulatory NST in mammals.
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Understanding the cultural value systems of nations is a key factor in anticipating the behaviour of business managers and employees in a specific business environment. Many research studies have acknowledged the impact of culture on communication across nations and its impact on business operations, however no study has attempted to measure and quantify the cultural orientations of people originating from one nation, but working in two different national settings. This study adopted Kluckhohn and Strodtbeck's framework to examine cultural dimensions of a total of 580 Indian respondents comprising two groups: 429 Indian natives living and working in India and 151 Indian migrants living and working in the USA. It initially compares the cultural orientations of the total population of each of the two groups and then examines cultural differences in the same based on demographic characteristics consisting of occupation, gender, age, and level of education. The study found significant cultural value differences between the two groups on both levels of analysis. The theoretical and practical implications of these findings are discussed in detail.
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This paper traces the major developments in the field of human resource management briefly and then highlights the need for more cross-national HRM studies. The results from two parallel surveys of matched Indian and British organizations are presented. The main aim of the surveys was to examine a wide range of HRM policies and practices in a cross-national comparative context. The surveys were run in six industries in the manufacturing sector. The study controlled for a number of variables such as size of the organization, product, industry sector and personnel participation. Influence of a number of contingent variables (such as age, size, nature and life-cycle stage of the organization, presence of unions and human resource strategies) on HRM policies and practices is analysed. The study finds significant differences in recruitment, compensation, training and development and employee communication practices between India and Britain.