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<p> Partial Evaluation (PE) is a program transformation technique that generates a specialized version of a program with respect to a subset of its inputs. PE is an automatic approach to program generation and meta-programming. This thesis presents a method of partially evaluating Maple programs using a fully online methodology.</p> <p> We present an implementation called MapleMIX, and use it towards two goals. Firstly we show how MapleMIX can be used to generate optimized versions of generic programs written in Maple. Secondly we use MapleMIX to mine symbolic computation code for residual theorems, which we present as precise solutions to parametric problems encountered in Computer Algebra Systems.</p> <p> The implementation of MapleMIX has been modularized using a high-level intermediate language called M-form. Several syntax transformations from Maple to M-form make it an ideal representation for performing program specialization. Many specialization techniques have been explored including a novel online approach to handle partially-static data structures and an on-the-fly syntax transformation technique that propagates loop context into the body of dynamic conditionals.</p> / Thesis / Master of Science (MSc)

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It was desired to isolate and identify the flavor material obtained by hydrolysis and oxidation from Acer saccharum wood. This has been done and the material is shown to be 3-methoxy-hydroxycinnamic aldehyde or coniferyl aldehyde. It has been shown definitely that the flavor is not due to vanillin. An extraction procedure has been worked out for the best isolation of the material without the losses attendant upon the methods previously given. It has been shown that previous methods of isolation may destroy some of the material by virtue of the alkaline reagents used. A number of products have been shown to be present in the wood extract and to be extractable from this aqueous wood extract by means of chloroform. Among these are lignin-like materials, gums, a phenol thought to be guaiacol, and malic and probably vanillic acid. Ground-work has been done for further investigation into the materials obtained by hydrolysis of the wood. / M.S.

Submitted by Jean Medeiros (jeanletras@uepb.edu.br) on 2016-04-19T13:56:14Z No. of bitstreams: 1 PDF - Edison Fernando da Silva Lima.pdf: 9125981 bytes, checksum: 332497337ebe6b4a6871009d22dde972 (MD5) / Approved for entry into archive by Secta BC (secta.csu.bc@uepb.edu.br) on 2016-07-22T20:24:27Z (GMT) No. of bitstreams: 1 PDF - Edison Fernando da Silva Lima.pdf: 9125981 bytes, checksum: 332497337ebe6b4a6871009d22dde972 (MD5) / Made available in DSpace on 2016-07-22T20:24:34Z (GMT). No. of bitstreams: 1 PDF - Edison Fernando da Silva Lima.pdf: 9125981 bytes, checksum: 332497337ebe6b4a6871009d22dde972 (MD5) Previous issue date: 2015-05-08 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / In this course conclusion work we will of conic approach in the study of analytic geometry and treat procedures in order to recognize the nature of the general equation of a curve of the second degree two variables, performing the analysis of the coefficients of your equation by an algebraic process. Simplification of calculations involved as well as the graphics sketch, the mathematical application Maple 18 will be used. Our aim is to develop students’ ability to relate and better secure the maths contents, since such an approach is not worked in textbooks the high school level. / Neste trabalho de conclusão de curso faremos uma abordagem das cônicas no estudo da Geometria Analítica e trataremos de procedimentos com a finalidade de se reconhecer a natureza da equação geral de uma curva do segundo grau a duas variáveis, realizando a análise dos coeficientes de sua equação por um processo algébrico. Na simplificação dos cálculos envolvidos, bem como no esboço de gráficos, será usado o aplicativo matemático Maple 18. Nosso intuito é desenvolver a habilidade dos alunos em relacionar e melhor fixar os conteúdos matemáticos abordados, visto que, tal abordagem não é trabalhada nos livros didáticos a nível de ensino médio.

Two studies were conducted to assess physiological responses of declining sugar maple (Acer saccharum Marsh.) in southern Quebec to wet acidic precipitation and increased soil fertility. Leaves of sugar maple were relatively acidic, had low external neutralization capacity (ENC = 5.1 $ mu$equiv. H$ sp{+} rm g sp{-1}$) and buffering capacity index (BCI = 103 $ mu$equiv. H$ sp{+} rm g sp{-1}$), and higher ENC/BCI compared to three other tree species. Deciduous species showed a higher BCI and a lower ENC in August. Our results suggest that sugar maple may be relatively sensitive to wet acidic deposition and that leaf buffering capacity is related to photosynthesis potential and seasonal change in foliar Ca concentration. Foliar analyses revealed that fertilization with a mixture of K, Ca, and Mg had significant effects on leaf concentrations of K, free amino acids (FAA) and the ratios of N to K, and FAA to N after two growing seasons. Our results suggest that base cation fertilization improved the N and K status of sugar maple and that leaf carbon partitioning appeared to be more dynamic in fertilized trees.

Sugar maple (Acer saccharum Marsh.) has experienced diebacks in many parts of its range; these declines have caused researchers to consider the many connected factors governing tree health. Altered availability of base cations due to acidic deposition and climatic extremes (drought, late winter freeze-thaw cycles) have been identified as two main causal stressors. To predict the role of climate on Ca nutrition, I investigated the relationship between the climatic factors of temperature, precipitation, water availability and windstorm on temporal changes to depth of Ca source of sugar maple. I hypothesized that the Ca uptake depth would be deeper after windstorms, or under dry or cold conditions, and shallower under warm or wet conditions. The ratio of Ca/Sr can be used to track the source of Ca. Calibration of the relationship between soil and plant Ca/Sr was done by analyzing Ca/Sr ratios in soil extracts of various strengths (H2O, NH4Cl, and ammonium EDTA) and in seedlings of sugar maple grown from natural regeneration on 37 differing sites. The relationships between soil extract Ca/Sr ratios and leaf and stem Ca/Sr ratios were linear, and the slopes of these relationships were different. These findings support the use of Ca/Sr as a tracer to Ca and they highlight the need to calibrate the technique for the plant tissue and the soil extractant used. This technique was then applied to study Ca uptake depth and its relationship with climate in the Hermine watershed, a sugar maple dominated forest in southern Quebec. The Ca/Sr was measured in soil, incremental cores of wood, and leaves. The ratio of Ca/Sr from nine soil profiles decreased with soil depth (r2 = 0.320, p&lt;0.05), providing a signature for depth. Wood cores from ten trees were analysed in five or ten year increments from 1940 to 1999 to provide a long-term trend of Ca nutrition. Sugar maple leaves from 1995-2005 from the same 25 trees were analyzed to determine the annual dynamics of Ca uptake depth and its relationship with climate. Results suggest that the majority of tree Ca is taken from the lowest part of the rooting zone, regardless of the climatic conditions that occurred during this study, although the minor variations were related to the April temperature (r2 = 0.208, p = 0.023) and the June, July and August combined total precipitation (r2 = 0.581, p = 0.006). The effect of the windstorm on Ca uptake depth was only apparent in the area of the forest most visibly affected; Ca uptake was deeper.

This study attempts to explain and account for the residential land use patterns of Maple Ridge for a thirty year period from 1930 to 1960. The residential land use pattern for I960 is presented in Chapter I; its development and characteristics are accounted for by the reconstruction of patterns for 1930, 1940, and 1950, in Chapters II, III, and IV respectively. Information from which the patterns of residential land use emerged for each decade was obtained from Assessment Rolls at the Maple Ridge Municipal Hall, Haney, and verified by municipal officials and observation. Residential land use in Maple Ridge began and spread from the centres of Haney and Hammond and formed a scattered pattern extending away from the Fraser River along the major avenues and roads. An uncontrolled pattern of scattered residential building characteristic of 1950 reached sprawl proportions by I960. / Arts, Faculty of / Geography, Department of / Graduate