862 resultados para Part Time Studies


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Spine title: Modern universal history.

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Mode of access: Internet.

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Thesis (Ph.D.)--University of Washington, 2016-06

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Background. To date few studies have investigated the impact of management for supratentorial tumour on the language abilities of children. In reporting children with brain tumour as part of a larger cohort of various aetiologies of brain injury, such studies have failed to differentiate between the causes of acquired childhood language disorders, or specifically report associated information relating to site and treatment. Material and methods. The present study examined the general language abilities of six children managed for supratentorial tumour, using a comprehensive standardized general language assessment battery, including receptive and expressive components, receptive vocabulary, and naming. Results. At a group level, children managed for supratentorial tumour performed below an individually matched control group in the area of general expressive language. However, at an individual case level it was revealed that only two cases exhibited specific language deficits. Reduced performance in the area of expressive language and syntax was evident in the language profile of one child treated surgically for a left parietal astrocytoma, while a child treated surgically for an optic nerve glioma demonstrated difficulties in receptive semantic abilities. The remaining four cases with similar treatments and locations demonstrated intact general language abilities. Conclusions. Factors such as site, long-term presence of tumour prior to diagnosis, young age at diagnosis, and variations in time post treatment were considered to have contributed to the findings. The need for long-term monitoring of language abilities post treatment as well as larger group sizes and the investigation of higher-level abilities was highlighted

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Rainfall variability occurs over a wide range of temporal scales. Knowledge and understanding of such variability can lead to improved risk management practices in agricultural and other industries. Analyses of temporal patterns in 100 yr of observed monthly global sea surface temperature and sea level pressure data show that the single most important cause of explainable, terrestrial rainfall variability resides within the El Nino-Southern Oscillation (ENSO) frequency domain (2.5-8.0 yr), followed by a slightly weaker but highly significant decadal signal (9-13 yr), with some evidence of lesser but significant rainfall variability at interclecadal time scales (15-18 yr). Most of the rainfall variability significantly linked to frequencies tower than ENSO occurs in the Australasian region, with smaller effects in North and South America, central and southern Africa, and western Europe. While low-frequency (LF) signals at a decadal frequency are dominant, the variability evident was ENSO-like in all the frequency domains considered. The extent to which such LF variability is (i) predictable and (ii) either part of the overall ENSO variability or caused by independent processes remains an as yet unanswered question. Further progress can only be made through mechanistic studies using a variety of models.

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Vector error-correction models (VECMs) have become increasingly important in their application to financial markets. Standard full-order VECM models assume non-zero entries in all their coefficient matrices. However, applications of VECM models to financial market data have revealed that zero entries are often a necessary part of efficient modelling. In such cases, the use of full-order VECM models may lead to incorrect inferences. Specifically, if indirect causality or Granger non-causality exists among the variables, the use of over-parameterised full-order VECM models may weaken the power of statistical inference. In this paper, it is argued that the zero–non-zero (ZNZ) patterned VECM is a more straightforward and effective means of testing for both indirect causality and Granger non-causality. For a ZNZ patterned VECM framework for time series of integrated order two, we provide a new algorithm to select cointegrating and loading vectors that can contain zero entries. Two case studies are used to demonstrate the usefulness of the algorithm in tests of purchasing power parity and a three-variable system involving the stock market.

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A one-dimensional computational model of pilling of a fibre assembly has been created. The model follows a set of individual fibres, as free ends and loops appear as fuzz and arc progressively withdrawn from the body of the assembly, and entangle to form pills, which eventually break off or are pulled out. The time dependence of the computation is given by ticks, which correspond to cycles of a wear and laundering process. The movement of the fibres is treated as a reptation process. A set of standard values is used as inputs to the computation. Predictions arc given of the change with a number Of cycles of mass of fuzz, mass of pills, and mass removed from the assembly. Changes in the standard values allow sensitivity studies to be carried out.