Spray combustion of residual fuel oil : particulate and gaseous emission in a two stage system

Imperial Users onl

Alkaloids of Venezuelan apocynaceae

Montréal Trigonix inc. 201

Computation of conformal representations of compact Riemann surfaces

We find a system of two polynomial equations in two unknowns, whose solution allows to give an explicit expression of the conformal representation of a simply connected three sheeted compact Riemann surface onto the extended complex plane. This function appears in the description of the ratio asymptotic of multiple orthogonal polynomials with respect to so called Nikishin systems of two measures.Comment: To appear in Mathematics of Computatio

Socioeconomic processes of land degradation in Guadalajara province (Spain)

Merged with duplicate record 10026.1/662 on 01.02.2017 by CS (TIS)Despite the great growth and interest in the study of socioeconomic processes of land degradation in many parts of the world, relatively little attention has been paid to these in Spain. Foresters play an important part in the national strategy to solve the problems of land degradation. It might be expected that after the changes which restored political democracy in Spain in the late 1970s, a reorganization of the way the planning and implementation of soil and water conservation projects through reforestation would be effected. The reforestation agencies of the Government could have improved the effectiveness of conservation by acknowledging and dealing with the need to study the socioeconomic processes of land degradation and involve affected people in the decision making process in planning. This is the main problematic which the thesis addresses. The thesis considers the way issues of land degradation are studied, and how the results of these studies have been adopted and put into practice by Spanish foresters. The workings of the Spanish State and powerful economic interests are considered to be major players determining forestry practice and the outcome of conservation. Some of the most relevant methods in current planning for soil and water conservation, namely those stemming from practice and research into the promotion of participation of affected people, are largely absent from Spanish academic studies and/or planning circles for reforestation projects. The thesis considers the advantages and disadvantages of participatory and multidisciplinary approaches to research with the aim of providing an improved understanding of land degradation processes. The participatory approach is also appraised for its practical value to those involved in planning reforestation projects. The thesis concludes that the dilemma faced by successive Spanish Governments regarding reforestation is one of decision making in planning, involving not only powerful interests, but also those of the people affected. The mismatch between what in Governmental circles is acknowledged as necessary (the participation of the people affected in the decision making process for conservation) and its practice, is the result of the inadequate professional composition of planning teams. The introduction of social science specialists to all the stages of the planning cycle is necessary to improve understanding of the socioeconomic processes of land degradation. For such improvement to occur the perceptions of land users must be included. In so doing it will increase the possibilities of more successful soil and water conservation projects.Faculty of Science of the University of Plymouth,the British Council in Madri

Variação intraespecífica da cor da pelagem de uma espécie de pequeno roedor sul-americano

Intra-specific color variation is often underestimated by researchers, and among mammalian species, intra-specific differences in coloration are poorly documented for most species. The main goal of this study was to apply an objective color measurement methodology to the study of a specific problem: the detection, if any, of patterns of changes in the fur color of specimens of Akodon budini in relation to biological (i.e., sex) and environmental (i.e., season) variables. We hypothesize that male coat color will be more homogeneous than that of females and that the winter coat color will be darker than that of summer, the latter being orange. We measured the pelage color on five points over the dorsal surface of 26 A. budini museum specimens region using a spectroradiometer and a diffuse illumination cabin. We used Principal Component Analysis to describe the association between the color variables, sex and season, and each of the observations. We then used general linear models of Analysis of Variance to examine relationships between color data, season, and sex. The results clearly confirm the hypothesis related to seasonal coat color change but do not directly confirm the hypothesis related to changes in coat color in relation to sex, and we show the complexity of the studied pattern. In conclusion, undoubtedly, the studied variables should accordingly be taken into account when studying the coloration of specimens for characterization, identification and discrimination of different taxonomic units based on color.Variação de cor intra-específica é muitas vezes subestimada pelos pesquisadores, e entre espécies de mamíferos, as diferenças intra-específicas na coloração são pouco conhecidas para a maioria das espécies. O principal objetivo deste estudo foi aplicar uma metodologia objetiva de medição de cor para o estudo de um problema específico: a detecção de padrões de mudanças na cor da pele de espécimes de Akodon budini em relação a variáveis biológicas (i.e., sexo) e ambientais (i.e., temporada), se houver. Nossa hipótese é que a cor da pelagem do sexo masculino será mais homogênea do que a de fêmeas e que a cor da pelagem do inverno vai ser mais escura do que a de verão, sendo esta última mais laranja. Medimos a cor da pelagem em cinco pontos sobre a superfície dorsal de 26 espécimes de museu de A. budini usando um espectroradiômetro e uma cabine de iluminação difusa. Usamos Análise de Componentes Principais para descrever a associação entre as variáveis de cor, sexo e temporada, e cada uma das observações. Em seguida, usamos modelos lineares gerais da Análise de Variância para verificar as relações entre os dados de cor, temporada, e sexo. Os resultados confirmam claramente a hipótese relacionada à mudança sazonal de cor da pelagem, mas não confirmam diretamente a hipótese relacionada com alterações na cor da pelagem em relação ao sexo, e vamos mostrar a complexidade do modelo estudado. Em conclusão, sem dúvida, as variáveis estudadas devem consequentemente ser tidas em conta quando se estuda a coloração de amostras para caracterização, identificação e discriminação de diferentes unidades taxonômicas com base na cor.Fil: Sandoval Salinas, Maria Leonor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Investigación en Luz, Ambiente y Visión. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Instituto de Investigación en Luz, Ambiente y Visión; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Programa de Investigación de Biodiversidad Argentina; ArgentinaFil: Barquez, Ruben Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Programa de Investigación de Biodiversidad Argentina; ArgentinaFil: Colombo, Elisa Margarita. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Investigación en Luz, Ambiente y Visión. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Instituto de Investigación en Luz, Ambiente y Visión; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Luminotecnia, Luz y Visión; ArgentinaFil: Sandoval, Jose Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Investigación en Luz, Ambiente y Visión. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Instituto de Investigación en Luz, Ambiente y Visión; Argentin

A Distributed Parabolic Control with Mixed Boundary Conditions

We study the asymptotic behavior of an optimal distributed control problem where the state is given by the heat equation with mixed boundary conditions. The parameter α intervenes in the Robin boundary condition and it represents the heat transfer coefficient on a portion Γ1 of the boundary of a given regular n-dimensional domain. For each α, the distributed parabolic control problem optimizes the internal energy g. It is proven that the optimal control ĝα with optimal state uĝαα and optimal adjoint state pĝαα are convergent as α → 1 (in norm of a suitable Sobolev parabolic space) to ĝ, uĝ and pĝ, respectively, where the limit problem has Dirichlet (instead of Robin) boundary conditions on Γ1. The main techniques used are derived from the parabolic variational inequality theory

Analysis of the length weight relationships for the western Atlantic bluefin tuna, Thunnus thynnus (L.)

This is an Accepted Manuscript of an article published by Taylor & Francis in Reviews in fisheries science & aquaculture on 2016, available online: http://wwww.tandfonline.com/10.1080/23308249.2015.1112359The recently adopted model by ICCAT Standing Committee on Research and Statistics (SCRS) for the western Atlantic bluefin tuna (ABFT), Thunnus thynnus (L.) (RW D 0.0000159137 SFL3.020584, WEST), together with the model used to date (RW D 0.0000152 SFL3.0531, Ec 1) is analyzed in using a bivariant sample (SFL (cm), RW (kg)) of 698 pairs of data (K D 2.02 § 0.23 SD) in order to validate them and to establish the model that fits best the reality represented by the sample and, therefore, will have the greatest descriptive and predictive power. The result of the analysis indicates that the adopted model WEST clearly underestimates the weight of pawning ABFT being model Ec 1 that best explains the data of the sample. The result of the classical statistical analysis is confirmed by means of the quantile regression technique, selecting the quantiles 5%, 25%, 50%, 75%, and 95%. Other biological and fisheries indicators also conclude that the model WEST gradually underestimates the weight of ABFT spawners (of 2 3 m) by 11 13%, does not meet the criterion that for RW = 725 kg (Wmax), SFL = 319.93 +- 11.3 cm (Lmax), and the average value of K (1.77) obtained for a wide range of size weight values, using WEST model, represents ABFT in low fattening condition.Cort, JL.; Estruch Fuster, VD. (2016). Analysis of the length weight relationships for the western Atlantic bluefin tuna, Thunnus thynnus (L.). Reviews in Fisheries Science & Aquaculture. 24(2):126-135. doi:10.1080/23308249.2015.1112359S126135242Aguado-Giménez, F., & García-García, B. (2005). Changes in some morphometric relationships in Atlantic bluefin tuna (Thunnus thynnus thynnus Linnaeus, 1758) as a result of fattening process. Aquaculture, 249(1-4), 303-309. doi:10.1016/j.aquaculture.2005.04.064Butler, M. J. A.Prince Edward Island bluefin tuna research program 1974. Summerside, PE: Prince Edward Island Marine Fisheries and Training Centre and Department of Tourism, Parks and Conservation, P.E.I, pp. 1–65 (1974).Caddy, J., C. A. Dickson, and J. A. Butler.Age and growth of giant bluefin tuna (Thunnus thynnus thynnus) taken in Canadian waters in 1975. Manuscript Report Series, 1395, St. Andrews, N. B.: Fisheries Research Canada, 17 p. (1976).Chapman, E. W., Jørgensen, C., & Lutcavage, M. E. (2011). Atlantic bluefin tuna (Thunnus thynnus): a state-dependent energy allocation model for growth, maturation, and reproductive investment. Canadian Journal of Fisheries and Aquatic Sciences, 68(11), 1934-1951. doi:10.1139/f2011-109Cort, J. L., Arregui, I., Estruch, V. D., & Deguara, S. (2014). Validation of the Growth Equation Applicable to the Eastern Atlantic Bluefin Tuna,Thunnus thynnus(L.), UsingLmax, Tag-Recapture, and First Dorsal Spine Analysis. Reviews in Fisheries Science & Aquaculture, 22(3), 239-255. doi:10.1080/23308249.2014.931173Cort, J. L., Deguara, S., Galaz, T., Mèlich, B., Artetxe, I., Arregi, I., … Idrissi, M. (2013). Determination ofLmaxfor Atlantic Bluefin Tuna,Thunnus thynnus(L.), from Meta-Analysis of Published and Available Biometric Data. Reviews in Fisheries Science, 21(2), 181-212. doi:10.1080/10641262.2013.793284Cort, J. L., Estruch, V. D., Neves Dos Santos, M., Di Natale, A., Abid, N., & de la Serna, J. M. (2015). On the Variability of the Length–Weight Relationship for Atlantic Bluefin Tuna,Thunnus thynnus(L.). Reviews in Fisheries Science & Aquaculture, 23(1), 23-38. doi:10.1080/23308249.2015.1008625Fraser, K.Possessed. World Record Holder for Bluefin Tuna. Kingstown, Nova Scotia: T & S Office Essentials and printing, 243 pp. (2008).Golet, W. J. Somatic condition, growth and distribution of Atlantic bluefin tuna (Thunnus thynnus) in the Gulf of Maine. Ph.D. Thesis, Durham: University of New Hampshire, 319 p. (2010).Koenker, R. (2005). Quantile Regression. doi:10.1017/cbo9780511754098Koenker, R., & Bassett, G. (1978). Regression Quantiles. Econometrica, 46(1), 33. doi:10.2307/1913643Mather, F. J. III, J. M. Jr Mason, and A. C. Jones. Historical document: life history and fisheries of Atlantic bluefin tuna. NOAA Technical Memorandum, NMFS-SEFSC-370, Miami, FL, 165 p. (1995).Perçin, F., & Akyol, O. (2009). Lengthâ weight and lengthâ length relationships of the bluefin tuna,Thunnus thynnusL., in the Turkish part of the eastern Mediterranean Sea. Journal of Applied Ichthyology, 25(6), 782-784. doi:10.1111/j.1439-0426.2009.01288.xPercin, F., & Akyol, O. (2010). Some Morphometric Relationships in Fattened Bluefin Tuna, Thunnus thynnus L., from the Turkish Aegean Sea. Journal of Animal and Veterinary Advances, 9(11), 1684-1688. doi:10.3923/javaa.2010.1684.1688Restrepo, V. R., Diaz, G. A., Walter, J. F., Neilson, J. D., Campana, S. E., Secor, D., & Wingate, R. L. (2010). Updated estimate of the growth curve of Western Atlantic bluefin tuna. Aquatic Living Resources, 23(4), 335-342. doi:10.1051/alr/2011004Rodriguez-Marin, E., Ortiz, M., Ortiz de Urbina, J. M., Quelle, P., Walter, J., Abid, N., … Zarrad, R. (2015). Atlantic Bluefin Tuna (Thunnus thynnus) Biometrics and Condition. PLOS ONE, 10(10), e0141478. doi:10.1371/journal.pone.014147