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2006
Caeiro, Frederico, and M.Ivette Gomes. "A new class of estimators of a ``scale'' second order parameter." Extremes. 9 (2006): 193-211. Abstract

{Let $X_i$ be i.i.d. r.v.s with heavy-tailed CDF $F(x)$ such that $$1-F(x)=(x/C)^{-1/\gamma}((1+(\beta/\rho)(x/C)^{\rho/\gamma} +\beta'(x/C)^{2\rho/\gamma}(1+o(1))),$$ where $\gamma$ is the tail index ($\gamma>0$), and $\rho<0$ and $\beta$ are the ``second order parameters''. The authors construct an estimator for $\beta$ based on the ``tail moments'' $$M_n^{(\alpha)}=(k)^{-1}\sum_{i=1}^k [łog X_{n-i+1:n}-łog X_{n-k:n}]^\alpha. $$ Consistency and asymptotic normality of the estimator are demonstrated. The small sample properties of the estimator are investigated via simulations.}

Schulp, AS, M. J. Polcyn, O. Mateus, LL Jacobs, LM Morais, and TS Tavares. "New mosasaur material from the Maastrichtian of Angola, with notes on the phylogeny, distribution and palaeoecology of the genus Prognathodon." Publicaties van het Natuurhistorisch Genootschap in Limburg Reeks XLV aflevering 1. Stichting Natuurpublicaties Limburg, Maastricht (2006): 57-67 .schulp_polcyn_mateus_jacobs_et_al_2006_new_mosasaur_material_from_the_maastrichtian_of_angola_with_notes_on_the_phylogeny_distribution_and_palaeoecology_of_the_genus_prognathodon.pdf
Diogo, T., P. Lima, and M. Rebelo. "Numerical solution of a nonlinear Abel type Volterra integral equation." Communications on Pure and Applied Analysis. 5 (2006): 277-288.
Jacobs, LL, O. Mateus, M. J. Polcyn, AS Schulp, MT Antunes, ML Morais, and T. da Silva Tavares. "The occurrence and geological setting of Cretaceous dinosaurs, mosasaurs, plesiosaurs, and turtles from Angola." Paleont. Soc. Korea. 22.1 (2006): 91-110. Abstractjacobs_mateus-et_al_2006_angola.pdf

Vertebrate-bearing fossiliferous outcrops of Cretaceous age in sub-Saharan Africa are rare because of younger superficial deposits, vegetation cover, and the widespread occurrence of Precambrian metamorphic plateau basement comprising much of the continent. However, one area of extensive marine and nonmarine
Cretaceous exposures is found between the plateau and the coast in Angola. The Angolan margin was formed in conjunction with the breakup of Gondwana and subsequent growth of the South Atlantic. Cretaceous deposits are constrained in age by the emplacement of oceanic crust, which began no later than magnetozone M3
(approximately 128 Ma, Barremian). Shallow marine facies are exposed in sea cliffs but equivalent facies become increasingly terrestrial inland. Few vertebrate fossils have been described from Angola aside from sharks.
Notable exceptions are the late Turonian mosasaurs Angolasaurus bocagei and Tylosaurus iembeensis from northern Angola. Those taxa are significant because they are among the earliest derived mosasaurs. Recent field work led to the discovery of a new skull of Angolasaursus as well as sharks, fish, plesiosaurs, the skull of a new taxon of turtle, additional mosasaurs, and the articulated forelimb of a sauropod dinosaur, the first reported dinosaur from Angola. In southern Angola, marine sediments spanning the Cretaceous-Paleogene boundary are found.

Ortigueira, M. D., and AG Batista. "On the fractional derivative of stationary stochastic processes." CST2006 & ECT2006 Conferences. 2006.
Castanhinha, R., and O. Mateus. "On the left-right asymmetry in dinosaurs." Journal of Vertebrate Paleontology. 26.Suppl. To 3 (2006): 48A. Abstractcastanhinhamateus2006.pdf

The study of different kinds of morphological left-right (L-R) asymmetries in all taxa is a very powerful tool to understand evolution since it is a way to measure the developmentalstability of an organism against environmental perturbations. Excluding every pathologic or subtle asymmetry and all cases of taphonomic distortion, this work focuses only on two
kinds of unambiguous asymmetries: fluctuating and adaptative asymmetry. There are several cases of conspicuous left-right asymmetry in dinosaurs and is probably more common than previously thought. The pneumatic cavities systems in skull and vertebrae of theropodsand sauropods are the most common cases reported. The shape (but not the occurrence) of pneumatic cavities might have been exposed to weak selective pressure becoming more random than other body structures. Asymmetries are rarer in the appendicular bones possibly because it represents a strong handicap in the function of the limbs, consequently in the locomotion of the individual. Teeth counting show many exceptions to the typical L-R symmetry. Peculiar cases of adaptive asymmetry are related with the plates of stegosaurs and the ear displacement in the skull of the troodontids, which may have an important role in the physiology and ecology of the animals. The asymmetric displacement maximizes the surface exposure of the stegosaurs dorsal plates. This is an advantage, either the plates were used for thermoregulation, display or specific identification. Work in progress on the braincases of some troodontids specimens shows asymmetric ear openings, which suggests thatcan be an analogy resulting from convergent evolution between troodontids and strigiformes birds, used for 3D directional acoustics. Asymmetries are more common in animals that develop under stress. Animals that lived under dramatic environmental changes periods—like mass-extinctions episodes are believed to be—should present more asymmetries.
However, much more sampling and time accuracy is required in order to be able to relate dinosaur asymmetries to extinction episodes. Asymmetries show strong intra-individual variation and should be taken in consideration in taxonomical studies.

Marques, C., R. C. da Silva, A. Wemans, M. J. P. Maneira, A. Kozanecki, and E. Alves. "Optical properties tailoring by high fluence implantation of Ag ions on sapphire." Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms. 242.1-2 (2006): 104-108.
C. Silva, J. Araújo, A. Moreira, J. F. B. Castro, F. Alencar, and R. Ramos. "Organizational Architectural Styles Specification." JISBD 2006. Sitges, Spain 2006. Abstract

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Crous, PW, B. Slippers, MJ WINGFIELD, J. Rheeder, WFO Marasas, AJL Philips, A. Alves, T. Burgess, P. Barber, and JZ Groenewald. "Phylogenetic lineages in the Botryosphaeriaceae." Studies in Mycology. 55 (2006): 235-253. Abstract

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Caeiro, F., and M. I. Gomes Redução de viés na estimação semi-paramétrica de um parâmetro de escala. Actas do XIII Congresso da SPE - "Ciência Estatística"., 2006.2006spe_127-148.pdf
Ramos, António, and Válter Lúcio. "Resistência ao Punçoamento de Lajes Fungiformes Pré-Esforçadas - Método Alternativo de Cálculo." Revista Internacional Construlink. 4 (2006): 4-14. Abstract

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JA, Almeida, Costa CN, Kullberg JC, and Vargas HS Rockfall hazard and risk analysis in Sintra area. 11th Annual Conference of the International Association for Mathematical Geology IAMG. Liège, 2006.iamg2006_rockfall_hazard.pdf
Ramos, António, and Valter Lúcio. "Safety on Punching of Prestressed Flat Slabs." fib congress 2006. Naples: fib, 2006. Abstract

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C. Silva, J. F. B. Castro, J. Araújo, A. Moreira, F. Alencar, and R. Ramos. "Separation and Modularization of Design Patterns-Specific Concerns in Detailed Architectural Design." CAiSE'06 Forum, 18th Conference on Advanced Information Systems Engineering (CAiSE 2006),. Luxembourg: University of Luxembourg, 2006. Abstract

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and Monteiro, Lima M. R. C. C. "Shrinkage behaviour of borosilicate glass-Al(2)O(3) composites during isothermal sintering." in Advanced Materials Forum Iii, Pts 1 and 2, Vol. 514-516. Materials Science Forum. 514-516 (2006): 648-652.
Silva, M. A. G., and C. C. Rodrigues. "Size and Relative Stiffness Effects on Compressive Failure of Concrete Columns Wrapped with Glass FRP." Journal of Materials in Civil Engineering. 18.3 (2006): 334-342. AbstractWebsite

Structural design relies essentially on tests made on cylinders of small size to estimate the probability of failure of prototype members, since full-scale testing of structures to determine their strength is not feasible. The confidence that such scale modeling deserves in terms of representation of actual behavior needs careful examination, due to such factors as material nonlinearities, difficulties of scale representation of particulate materials, and sometimes the impossibility of simultaneously satisfying independent dimensionless parameters. Some failures explained by linear fracture mechanics are associable with strong size effects, as opposed to the cases where small cracks are a material property. Besides research centered on these problems, a number of studies of scale effects have been associated with the increased probability of finding a flaw in larger objects. In fact, geometric similitude may coexist with microscopic randomness of flaws that cause size effects to appear. The type of material of the object under study may also be a decisive factor. For example, scatter of the mechanical properties in unidirectional fiber-reinforced polymers (FRPs) is much larger than in metals due to a larger density of flaws. Thus the strength of FRP laminates may depend on the volume of material involved. Strengthening reinforced concrete columns with FRP wraps leads to new constitutive laws for the overall response of the columns and requires small-scale testing followed by extrapolation for design use. The present paper focuses on the difficulties of this step, based on the experimental data obtained. The questions mentioned above are addressed, and the relevance of the adequate representation of the lateral stiffness of the FRP jacket in the scaled cylinders is emphasized. The paper also addresses the problem of testing confined cylinders with a given slenderness ratio H/D=height/diameter, within the range usually characteristic of short columns, and extrapolating the results for columns of different H/D. The importance of the parameter (thickness of jacket/diameter of column, representative of stiffness of jacket/stiffness of concrete core) is also examined. The influence of the parameter is shown to be relatively minor, whereas the nonscaling of the relative stiffness of the core and jacket would be a major cause of error. The experimental data, in terms of strain and strength, are also compared with numerical models proposed in the literature, and the quality of the approximations is analyzed.

Oliveira, F. Stability of Solitons of the Zakharov-Rubenchik Equation, Proceedings. WASCOM05 13th Conference on Waves and Stability in Continuous Media. Acereale, Italy: World Scientific, 2006.
Cardoso A. S., Marques M. M. B., Srinivasan Prabhakar Lobo Rzepa N. S. A. M. "Studies in sigmatropic rearrangements of N-prenylindole derivatives - a formal enantiomerically pure synthesis of tryprostatin B." Org. Biomol. Chem. . 4 (2006): 3966-3972.
Salema, Maria Isabel Gomes, A. P. Barbosa-Póvoa, and Augusto Q. Novais. "Supply Chain Design and Planning with Product Return: An Optimization Approach." Production and Operations Management Society Conference. Boston, USA 2006. 1-11. Abstract2006_salema06scdesignplanning_poms06.pdf

This paper addresses the design and planning of supply chains with product return. A graph approach is used as the modelling methodology. Commonly, the application of graph approaches to the design of supply chains, considers nodes as chain entities and arcs as connections between them. These assumptions are extended in the present work where products may also be associated with both nodes and arcs. A multi-product network formulation is obtained which is further generalised to consider the modelling of time, resulting in a dynamic multi-product network model with product return. This generalisation assumes that any node is a transformation point which allows inbound and outbound products to differ. Considering four different kinds of entities (factories, warehouses, sorting centres and customers), proper functions are defined for each one: production, postponement, usage and selection. An example, base on a Portuguese industry case, is applied in order to corroborate the model applicability and adequacy to real world problems.

Barros, M. T., and A. M. Faísca Phillips. "Synthesis of new chiral amines with a cyclic 1,2-diacetal skeleton derived from (2R, 3R)-(+)-tartaric acid." Molecules. 11 (2006): 177-196.
R. Raminhos, M. Pantoquilho, J. Araújo, and A. Moreira. "A Systematic Analysis Patterns Specification." International Conference on Enterprise Information Systems (ICEIS). Paphos, Cyprus 2006. Abstract

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Brand, T., E. J. Cabrita, and S. Berger. "Theory and Application of NMR Diffusion Studies ." Modern Magnetic Resonanc. Ed. Graham A. Webb. Springer, 2006. 131-139.
I. S. Brito, A. Moreira, and J. Araújo. "Tool Support for Aspect-Oriented Requirements." The 10th IASTED International Conference on Software Engineering and Applications. IASTED, 2006. Abstract

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C. Silva, J. Araújo, A. Moreira, J. F. B. Castro, D. Penaforte, and A. Carvalho. "Towards an Aspect Oriented Modeling in Multi-agent Systems." Workshop on AOSD, WASP'06, 20th Brasilian Symposium on Software Engineering (SBES'06). Florianópolis, Brazil 2006. Abstract

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