Export 9195 results:
Sort by: Author Title Type [ Year  (Desc)]
2002
Glavchev, I., K. Petrova, and M. Ivanova. "Determination of the coefficient of thermal expansion of epoxy composites." Polym. Test. 21.2 (2002): 177-179. DOI: 10.1016/S0142-9418(01)00066.
Glavchev, I., K. T. Petrova, and I. Devedjiev. "Determination of the rate of cure of epoxy resin/maleic anhydride/Lewis acids." Polym. Test. 21.1 (2002): 89-91. DOI: 10.1016/S0142-9418(01)00053-8.
A. Rashid, P. Sawyer, A. Moreira, and J. Araújo. "Early Aspects: a Model for Aspect-Oriented Requirements Engineering." Requirements Engineering 2002 (RE'02). Essen, Germany: IEEE Computer Society, 2002. Abstract

n/a

Lapa, N., J. F. Santos Oliveira, S. L. Camacho, and L. J. Circeo. "An ecotoxic risk assessment of residue materials produced by the plasma pyrolysis/vitrification (PP/V) process." Waste Management. 22.3 (2002): 335-342. AbstractWebsite

Plasma is the fourth state of matter, following the three states of solid, liquid and gas. Experience has amply demonstrated that solids exposed to the oxygen-deficient plasma flame are converted to liquid, and liquid exposed to the same flame is converted to gas. A low amount of vitrified solid residue material usually remains at the end of this process. Plasma pyrolysis/vitrification (PP/V) has been demonstrated as a safe, efficient, cost-effective technology for the treatment of wastes, including hazardous wastes. Besides the low amounts of gaseous byproducts that PP/V produces, the solid vitrified residue presents a low leachability of pollutants. Studies have been performed in many countries in order to assess the leachability of chemical substances. But from the results of identified studies, none has reported results on the ecotoxicological properties of the leachates. The aim of this study was to contribute to the assessment of ecotoxic risk of four different vitrified materials. Vitrified samples of contaminated soils, municipal solid wastes, and incinerator bottom ashes were submitted to the European leaching pre-standard test number prEN 12457-2. The leachates were analyzed for 22 chemical parameters. The biological characterization comprised the assessment of bioluminescence inhibition of Photobacterium phosphoreum bacterium, growth inhibition of Pseudokirchneriella subcapitata algae and the germination inhibition of Lactuca sativa vegetable. The chemical and ecotoxicological results were analyzed according to the French proposal of Criteria on the Evaluation Methods of Waste Toxicity (CEMWT) and a Toxicity Classification System (TCS). The chemical and ecotoxicological results indicated a low leachability of pollutants and a low toxicity level of leachates. All samples studied were as below the TCS class 1 level (no significant toxicity observed) and as non-ecotoxic for CEMWT. Therefore, the environmental ecotoxic risk of the analyzed vitrified samples was determined to be very low.

Lapa, N., R. Barbosa, J. Morais, B. Mendes, J. Méhu, and J. Santos Oliveira. "Ecotoxicological assessment of leachates from MSWI bottom ashes." Waste Management. 22.6 (2002): 583-593. AbstractWebsite

In this paper, chemical and ecotoxicological data of leachates from bottom ashes collected in different Municipal Solid Waste Incinerators (MSWI) are shown. The bottom ashes were collected in Belgium (three incinerators—samples B1 to B3), France, Germany, Italy and United Kingdom (one incinerator in each country—samples F1, D1, I1 and UK1, respectively). Both chemical and ecotoxicological characterizations of leachates were done on the framework of the European Directive 91/689/EEC and the European Council Decision 94/904/EC. This work was carried out under the European project called Valomat, which was supported by the European Commission through Brite-Euram III program. Twenty-one inorganic parameters were analyzed. The ecotoxicological assays were done under standard laboratory conditions, using the bacterium Photobacterium phosphoreum, the freshwater alga Pseudokirchneriella subcapitata, the crustacean Daphnia magna and the vegetable Lactuca sativa. Chemical data varied from sample to sample. Similar results were obtained in biological assays. The samples can be classified as ecotoxic/hazardous according to the French proposal for a Criterion and Evaluation Methods of Waste Ecotoxicity (CEMWE) and the German regulation on Hazardous Waste Classification (HWC). However, samples B1, B2, B3 and D1 comply the maximum limits for direct valorization category defined in the French Classification of Bottom Ashes based on their Polluting Potential (CBAPP). Sample B1 presented the lowest level of ecotoxicity, being considered as the most interesting to be used in the development of new materials for civil engineering works.

Amado, M. P. Energy Conservation in Habitation Buildings and the Level of Environmental Comfort. Housing Construction – An Interdisciplinary Task. Coimbra, Portugal: Wide Dreams – Projectos Multimédia, 2002.
Jacinto, J. J., and O. Mateus. "Integration of the distribution of Hemidactylus turcicus and Tarentola mauritanica in Portugal Continental in a G.I.S. and some occasional observations." Livro de resumos do VII Congresso Luso-espanhol (XI Congreso Español de Herpetologia. Évora, Portugal: Sociedade Portuguesa de Herpetologia & Associacion Herpetologica Española, 2002. 127. Abstract

n/a

Karlovich, Alexei Yu., and Yuri I. Karlovich. "Invertibility in Banach algebras of functional operators with non-Carleman shifts." Ukrains'kyj matematychnyj kongres -- 2001. Pratsi. Sektsiya 11. Funktsional'nyj analiz. Kyiv: Instytut Matematyky NAN Ukrainy, 2002. 107-124. Abstract13_2002_ukrainian_math_congress-kyiv-01.pdf

We prove the inverse closedness of the Banach algebra \(\mathfrak{A}_p\) of functional operators with non-Carleman shifts, which have only two fixed points, in the Banach algebra of all bounded linear operators on \(L^p\). We suppose that \(1 \le p \le \infty\) and the generators of the algebra \(\mathfrak{A}_p\) have essentially bounded data. An invertibility criterion for functional operators in \(\mathfrak{A}_p\) is obtained in terms of
the invertibility of a family of discrete operators on \(l^p\). An effective invertibility criterion is established for binomial difference operators with \(l^\infty\) coefficients on the spaces \(l^p\). Using the reduction to binomial difference operators, we give effective criteria of invertibility for binomial functional operators on the spaces \(L^p\).

Reis, A., J. Pedro, F. P. Amarante dos Santos, and L. Salvador. "Modelos de análise de estruturas de engenharia civil: Coberturas de estádios e pontes de tirantes." VII Congresso de Mecanica Aplicada e Computacional. Évora 2002.
Mateus, O., and MT Antunes. "Novos vestígios de dinossauros saurópodes do Jurássico Superior da Lourinhã (Portugal)." Congresso Ibérico de Herpetologia. Évora, Portugal 2002. Abstract

n/a

Fernandes, Vítor H. "Presentations for some monoids of partial transformations on a finite chain: a survey." Semigroups, algorithms, automata and languages (Coimbra, 2001). World Sci. Publ., River Edge, NJ, 2002. 363-378.
M. Lencastre, F. Santos, and J. Araújo. "A Process Model for FEM Simulation Support Development." Summer Computer Simulation Conference (SCSC 2002). The Society for Modeling & Simulation International (SCS), 2002. Abstract

n/a

Cardoso, R. M. R., and A. D. Egídio dos Reis. "Recursive calculation of time to ruin distributions." Insurance: Mathematics and Economics. 30.2 (2002): 219-230.
Barão, M., J. M. Lemos, and R. Neves-Silva. "Reduced complexity adaptive nonlinear control of a distributed collector solar field." Journal of Process Control. 12 (2002): 131-141.
Rybarczyk, Y., Ait Aider O., Hoppenot P., and Colle E. "Remote control of a biomimetics robot assistance system for disabled persons." AMSE Modelling, Measurement and Control. 63.4 (2002): 47-56.copy.pdf
I. S. Brito, A. Moreira, and J. Araújo. "A requirements model to quality attributes." Workshop on Early Aspects: Aspect-Oriented Requirements Engineering and Architecture Design, na 1st International Conference on Aspect-Oriented Software Development (AOSD 2002) . Enschede, Holland: ACM, 2002. Abstract

n/a

"Solutions of the Polchinski ERG equation in the O(N) scalar model." International Journal of Modern Physics A. 17.32 (2002): 4871-4902.Website
Marques M. M. B., Pichlmair S., Martin Mulzer H. J. J. "Stereocontrolled synthesis of C-arylglycosides applied to the south west fragment of the antibiotic kendomycin." Synthesis. 18 (2002): 2766-2770.
and M. Lima, F. M. B. Fernandes, Monteiro R. C. C. "Study of the crystallization of a borosilicate glass." Advanced Materials Forum I, Vol. 230-2. Key Engineering Materials. 230-232 (2002): 157-160.
Janosik, T.; Bergman, Romero Stensland Stalhandske Marques Santos Lobo Prabha J.; I.;. "Synthetic, spectroscopic, and X-ray crystallographic studies of [1,2,7,8]tetrathiacyclododecino[4,3-b : 5,6-b': 10,9-b": 11,12-b''']tetraindoles." Eur. J. Org. Chem.. 8 (2002): 1392-1396.
Reis, A. J., and F. P. Amarante dos Santos. "Uma obra de arte especial sobre a VCI no Porto: Faseamento Construtivo." Encontro Nacional de Betão Estrutural. Lisboa 2002.
J. Araújo, J. Whittle, and A. Toval. "Workshop on Integration and Transformation in UML Models." ECOOP 2002 Workshop Reader. Lecture Notes on Computer Science. Springer-Verlag, 2002. Abstract

n/a