4,624 research outputs found
Catálogo de los Braquiópodos españoles del Jurásico Inferior depositados en el Museo Geominero (ITGE, Madrid)
No full textRESUMEN: Se revisan desde el punto de vista taxonómico y bioestratigráfico los braquiópodos españoies del Jurásico Inferior que constituyen la colección del Museo Geominero. La colección está compuesta por 1102 ejemplares procedentes de 98 localidades diferentes repartidas fundamentalmente por el sector nororiental de la Península Ibérica. Se han identificado 23 géneros (10 de rinconélidos, 3 de espiriféridos y 10 de terebratúlídos) y 59 especies (24 de rinconélidos, 5 de espiriféridos y 30 de terebratúlidos).ABSTRACT: Lower Jurassic Spanish brachiopods from the Geominero Museum coliection are re-examined. Taxa are brought up to the date and the species are figured. The collection consists of 1102 specimens of 98 localities calities mainly from the northeast sector of the Iberian Peninsula. 23 genera (10 rhynchonellids, 3 spiriferids and 10 terebratulids) and 59 species (24 rhynchonellids, 5 spiriferids and 30 terebratulids) have been identified.Dirección General de Investigación de la Comunidad de MadridDepto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasTRUEpu
The Project Ptdc/cte-gix/098968/2008 - High Resolution Stratigraphy Of The Lower Jurassic Organic-rich Marine Series In The Lusitanian Basin (portugal): Initial Expectations And Results [o Projecto Ptdc/cte-gix/098968/2008 - Estratigrafia De Alta Resolução Das Séries Marinhas Ricas Em Matéria Orgânica Do Jurássico Inferior Da Bacia Lusitânica: Perspectivas Iniciais E Resultados Obtidos]
No full textThis work presents the main results of the Project "High resolution stratigraphy of the Lower Jurassic organic-rich marine series in the Lusitanian Basin (Portugal)", supported by the Portuguese Foundation for Science and Technology. This project was focused on a multidisciplinary stratigraphic analysis based on the study of a range of biotic and abiotic parameters of the Lower Jurassic marl-limestone succession rich in organic matter, embracing seven main objectives: 1. Sedimentological (mineralogical, textural and compositional) and sequential analysis of the whole Lower Jurassic hemipelagic succession (Upper Sinemurian-Toarcian); 2. Ammonite biostratigraphic precisions of the Upper Sinemurian and Upper Pliensbachian; 3. Palaeontological and palaeoecological analysis of the benthic macrofauna (especially brachiopods and bivalves); 4. Biostratigraphical, taxonomic and palaeoecological analysis of the ostracod fauna (Sinemurian-Toarcian); 5. Chemostratigraphic analysis based mainly on carbon stable isotopes (Sinemurian-Pliensbachian); 6. Organic geochemical and petrographic analysis (total organic carbon, palynofacies, Rock-Eval pyrolysis and biomarkers) of the Sinemurian-Pliensbachian; 7. Vertical variation patterns of gamma-ray analysis (Sinemurian- Toarcian). Besides the new results in each specific scientific domain (for example, biostratigraphy, palaeoecology, sedimentology, sequence stratigraphy and cyclicity, chemostratigraphy and organic geochemistry), the integration of all data, in several cases at highresolution level, allows emphasizing the achievement of two main transverse goals: the improvement of the stratigraphy and sedimentary knowledge of the Lower Jurassic series of western Iberia margin, with implications in the palaoenvironmental and palaeoceanographic interpretations of the Tethyan pre-Atlantic basins dynamics and global correlation; taking into consideration the huge number of organic geochemical parameters analyzed, the results of this research contributed significantly to understand the role of the different Sinemurian and Pliensbachian organic-rich intervals as potential hydrocarbon generation sources (quality of organic matter and maturation). © 2013 LNEG - Laboratório Nacional de Geologia e Energia IP.100SPEC.ISS.1713Azerêdo, A.C., Duarte, L.V., Henriques, M.H., Manuppella, G., Da dinâmica continental no Triásico aos mares do Jurássico Inferior e Médio (2003) Cadernos de Geologia de Portugal, p. 43. , Instituto Geológico e MineiroAzerêdo, A.C., Mendonça Filho, J.G., Cabral, M.C., Duarte, L.V., Calcários pedogénicos e níveis ricos em matéria orgânica no Jurássico Médio da Pedreira do Galinha, Serra de Aire: Abordagem multi-disciplinar (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 95-100. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosBarrón, E., Comas-Rengifo, M.J., Duarte, L.V., Palynomorph succession of the Upper Pliensbachian-Lower Toarcian of the Peniche section (Portugal) (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 55-61. , In: Duarte, L.V., Silva, R.L., Azerêdo (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosBarroso-Barcenilla, F., Comas-Rengifo, M.J., Duarte, L.V., Goy, A., Martínez, G., A new genus of nautiloid in the Toarcian of the Iberian Peninsula (Spain and Portugal) (2011) Bulletin de la Société Géologique de France, 182 (5), pp. 391-404Boussaha, M., Caractérisation spatiale des paléoenvironnements au Sinémurien (Bassin Lusitanien) sur la base des assemblages à nannofossiles calcaires (2011) Master Sciences Technologies Santé mention Sciences de la Terre spécialité Paléontologie Sédimentologie Paléoenvironnements, 1, p. 49. , Université Claude Bernard LyonCabral, M.C., Azerêdo, A.C., Colin, J.-P., Silva, R.L., Duarte, L.V., Associações de ostracodos da Formação de Coimbra (Sinemuriano) de S. Pedro de Moel: Valor paleoecológico e paleobiogeográfico (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 43-47. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosCabral, M.C., Lord, A.R., Boomer, I.D., Loureiro, I.M., Malz, H., Tanycythere gen. nov. and its significance for Jurassic ostracod diversity patterns Palaeontology, , (submetido)Cabral, M.C., Loureiro, I.M., Duarte, L.V., Azerêdo, A.C., Registo da extinção dos Metacopina (Ostracoda, Crustacea) no Toarciano de Rabaçal, região de Coimbra (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 63-68. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosComas-Rengifo, M.J., Duarte, L.V., García Joral, F., Goy, A., Los braquiópodos del Toarciense inferior (Jurásico) en el área de Rabaçal-Condeixa (Portugal): Distribución estratigráfica y paleobiogeografía (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 37-42. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosComas-Rengifo, M.J., Duarte, L.V., Goy, A., Paredes, R., Silva, R.L., El Sinemuriense Superior (cronozonas Oxynotum y Raricostatum) en la región de S. Pedro de Moel (Cuenca Lusitánica, Portugal) (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 15-19. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosCorreia, G., Aplicações da Espectrometria de Raios Gama no Estudo de Séries Carbonatadas. O caso do Jurássico Inferior da Bacia Lusitânica (2011) Tese de Mestrado em Geociências (especialidade em Geologia do Petróleo) não publicada, p. 97. , Departamento de Ciências da Terra da Universidade de Coimbra, CoimbraCorreia, G., Duarte, L.V., Pereira, A., Silva, R.L., Outcrop Spectral Gamma-Ray applications to the Sinemurian-Pliensbachian organic-rich facies of the Lusitanian Basin (Portugal) (2012) Journal of Iberian Geology, 38 (2), pp. 373-388Correia, G., Duarte, L.V., Pereira, A.C., Evidências paleogeográficas e correlação estratigráfica através da utilização da espectrometria de raios gama no Toarciano inferior de diferentes sectores da Bacia Lusitânica (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 89-93. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosCorreia, G., Duarte, L.V., Pereira, A.C., Silva, R.L., Mendonça Filho, J.G., Utilização da espectrometria de raios gama na caracterização das fácies ricas em matéria orgânica do Sinemuriano-Pliensbaquiano da Bacia Lusitânica (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 77-82. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosDuarte, L.V., Facies analysis and sequential evolution of the Toarcian-Lower Aalenian series in the Lusitanian Basin (Portugal) (1997) Comunicações do Instituto Geológico e Mineiro, 83, pp. 65-94Duarte, L.V., Lithostratigraphy, sequence stratigraphy and depositional setting of the Pliensbachian and Toarcian series in the Lusitanian Basin (Portugal) (2007) Ciências da Terra (UNL), 16, pp. 17-23Duarte, L.V., Krautter, M., Soares, A.F., Bioconstructions à spongiaires siliceux dans le Lias terminal du Bassin lusitanien (Portugal): Stratigraphie, sédimentologie et signification paléogéographique (2001) Bulletin de la Société Géologique de France, 172 (5), pp. 637-646Duarte, L.V., Silva, R.L., Mendonça Filho, J.G., The Lower Jurassic of west coast of Portugal: Stratigraphy and organic matter in carbonate sedimentation (2011) Field Trip Guide Book of 63rd Annual Meeting of the International Committee for Coal and Organic Petrology, Memórias, 17, pp. 1-42. , In: Flores, M., Marques, M. (Eds)Duarte, L.V., Silva, R.L., Mendonça Filho, J.G., Variação do COT e pirólise Rock-Eval do Jurássico Inferior da região de S. Pedro de Moel. Potencial de geração de hidrocarbonetos (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 107-111. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosDuarte, L.V., Silva, R.L., Mendonça Filho, J.G., Oliveira, L.C., Evidências geoquímicas do Jurássico Inferior de Peniche (Bacia Lusitânica, Portugal): Estado de arte e perspectivas futuras. In: Flores, D., Marques, M. (Eds), Saídas de Campo do X Congresso de Geoquímica dos Países de Língua Portuguesa/XVI Semana de Geoquímica (2010) Memórias (Porto), 15, pp. 3-24Duarte, L.V., Silva, R.L., Mendonça Filho, J.G., Poças Ribeiro, N., Chagas, R.B.A., High-resolution stratigraphy, Palynofacies and source rock potential of the Água de Madeiros Formation (Upper Sinemurian) of the Lusitanian Basin, Portugal (2012) Journal of Petroleum Geology, 35 (2), pp. 105-126Duarte, L.V., Silva, R.L., Mendonça Filho, J.G., Poças Ribeiro, N., Ferreira, F., Chapter 8: Case Studies (Dispersed Organic Matter). Lusitanian Basin: Geological setting, stratigraphy and organic matter record in the Lower Jurassic hemipelagic deposits of the Lusitanian Basin (2011) ICCP Training Course on Dispersed Organic Matter, pp. 107-118. , In: Flores, D., Marques, M. (Eds), ICCP Training program Commission I, PortoDuarte, L.V., Silva, R.L., Oliveira, L.C.V., Comas-Rengifo, M.J., Silva, F., Organic-rich facies in the Sinemurian and Pliensbachian of the Lusitanian Basin, Portugal: Total Organic Carbon distribution and relation to transgressive-regressive facies cycles (2010) Geologica Acta, 8, pp. 325-340Duarte, L.V., Soares, A.F., Litostratigrafia das séries margocalcárias do Jurássico Inferior da Bacia Lusitânica (Portugal) (2002) Comunicações do Instituto Geológico e Mineiro, 89, pp. 135-154Ferreira, R., Composição orgânica e maturação térmica da Formação de Vale das Fontes (Pliensbaquiano) de Peniche. Potencial de geração de hidrocarbonetos (2010) Tese de Mestrado em Geociências (especialidade em Geologia do Petróleo) não publicada, p. 89. , Departamento de Ciências da Terra da Universidade de Coimbra, CoimbraFerreira, R., Mendonça Filho, J.G., Duarte, L.V., Silva, R.L., Mendonça, J.O., Hydrocarbon generation potential of the Pliensbachian organic-rich series of Peniche (Lusitanian Basin, Portugal): An organopetrographic and thermal maturation assessment integrated analysis (2010) II Central & North Atlantic Conjugate Margins Conference. Extended Abstracts, Lisbon, pp. 116-120. , In: Pena dos Reis, R, Pimentel, N. (Eds), PortugalLoureiro, I.M., Cabral, M.C., Duarte, L.V., Azerêdo, A.C., Ostracodos do Sinemuriano superior da região de S. Pedro de Moel e de Peniche: Relação com o contexto sedimentar (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 49-54. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosMattioli, E., Plancq, M., Boussaha, M., Duarte, L.V., Pittet, B., Calcareous nannofossil biostratigraphy: New data from the Early Jurassic of the Lusitanian Basin (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 69-76. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosMendonça Filho, J.G., Silva, T.F., Silva, R.L., Duarte, L.V., Poças Ribeiro, N., Distribuição dos biomarcadores hopanóides e sua relação com a matéria orgânica nas séries jurássicas de S. Pedro de Moel, Bacia Lusitânica (Portugal) (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 101-105. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosMouterde, R., Rocha, R.B., Ruget, C., Tintant, H., Faciès, biostratigraphie et paléogéographie du Jurassique portugais (1979) Ciências Terra (UNL), 5, pp. 29-52Mouterde, R., Ruget, C., Esquisse de la paléogéographie du Jurassique inférieur et moyen au Portugal (1975) Bulletin de la Société géologique de France, 17, pp. 779-786. , 7e SérieParedes, R., Bivalves do Sinemuriano da Bacia Lusitânica. Registos paleontológicos com importância para a valorização do património geológico português (2012) Tese de Mestrado em Geociências não publicada, p. 121. , Departamento de Ciências da Terra da Universidade de CoimbraParedes, R., Comas-Rengifo, M.J., Duarte, L.V., Moluscos bivalves da Formação de Água de Madeiros (Sinemuriano superior) da Bacia Lusitânica (Portugal) (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 21-27. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosParedes, R., Comas-Rengifo, M.J., Goy, A., Duarte, L.V., Braquiópodes do Sinemuriano superior da região de S. Pedro de Moel e de Peniche (Bacia Lusitânica, Portugal) (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 29-35. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosPoças Ribeiro, N., Contribuição para o estudo da matéria orgânica do Sinemuriano superior de S. Pedro de Moel e de Peniche (Portugal) (2011) Tese de Mestrado em Geociências (especialidade em Geologia do Petróleo) não publicada, p. 99. , Departamento de Ciências da Terra da Universidade de CoimbraPoças Ribeiro, N., Mendonça Filho, J.G., Duarte, L.V., Silva, R.L., Mendonça, J.O., Silva, T.F., Palynofacies and Organic Geochemistry of the Sinemurian carbonate deposits in the western Lusitanian Basin (Portugal): Coimbra and Água de Madeiros formations (2013) International Journal of Coal Geology, 111, pp. 37-52Silva, R.L., Séries carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica (Portugal): Sedimentologia, Geoquímica e interpretação paleoambiental (2013) Tese de Doutoramento não publicada, p. 250. , Universidade de CoimbraSilva, R.L., Duarte, L.V., Azerêdo, A.C., Mendonça Filho, J.G., Contributos sedimentológicos e geoquímicos para a modelação dos sistemas petrolíferos portugueses: As séries jurássicas ricas em matéria orgânica da Bacia Lusitânica (Portugal) (2011) Modelação de Sistemas Geológicos, Laboratório de Radioactividade Natural da Universidade de Coimbra, pp. 383-391Silva, R.L., Duarte, L.V., Comas-Rengifo, M.J., Mendonça Filho, J.G., Azerêdo, A.C., Update of the carbon and oxygen isotopic records of the Early-Late Pliensbachian: Insights from the organic-rich hemipelagic series of the Lusitanian Basin (Portugal) (2011) Chemical Geology, 283, pp. 177-184Silva, R.L., Duarte, L.V., Comas-Rengifo, M.J., Mendonça Filho, J.G., Azerêdo, A.C., A sedimentação margo-calcária rica em matéria orgânica do Pliensbaquiano da Bacia Lusitânica: Estratigrafia integrada e evolução paleoambiental (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 83-87. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosSilva, R.L., Duarte, L.V., Mendonça Filho, J.G., Optical and geochemical characterization of Upper Sinemurian (Lower Jurassic) fossil wood from the Lusitanian Basin (Portugal) (2013) Geochemical Journal, , (em revisão)Silva, R.L., Duarte, L.V., Mendonça Filho, J.G., Azerêdo, A.C., Contrasts between the two main Jurassic source rocks in the western margin of the Lusitanian Basin (Portugal) (2010) II Central & North Atlantic Conjugate Margins Conference, pp. 261-265. , In: Pena dos Reis, R, Pimentel, N (Eds.), Extended Abstracts, Lisbon, PortugalSilva, R.L., Mendonça Filho, J.G., Azerêdo, A.C., Duarte, L.V., Palynofacies and TOC analysis of marine and non-marine sediments across the Middle-Upper Jurassic boundary in the Central-Northern Lusitanian Basin (Portugal) (2013) Facies, , doi: 10.1007/s10347-013-0369-xSilva, R.L., Mendonça Filho, J.G., Azerêdo, A.C., Duarte, L.V., Palinofácies e caracterização de matéria orgânica da Formação de Cabaços (Bacia Lusitânica): Contributos para a discriminação das dinâmicas paleobiológicas e paleoambientais em meios carbonatados dominantemente não-marinhos (2013) Comunicações Geológicas, 100 (ESPECIAL I), pp. 113-118. , In: Duarte, L.V., Silva, R.L., Azerêdo, A.C. (Eds), Fácies carbonatadas ricas em matéria orgânica do Jurássico da Bacia Lusitânica. Novos contributos paleontológicos, sedimentológicos e geoquímicosSilva, R.L., Mendonça Filho, J.G., da Silva, F.S., Duarte, L.V., Silva, T.F., Ferreira, R., Azerêdo, A.C., Can biogeochemistry aid in the palaeoenvironmental/early diagenesis reconstruction of the ~187 Ma (Pliensbachian) organic-rich hemipelagic series of the Lusitanian Basin (Portugal)? (2012) Bulletin of Geosciences, 87, pp. 373-382Soares, A.F., Rocha, R.B., Elmi, S., Henriques, M.H., Mouterde, R., Almeras, Y., Ruget, C., Kullberg, J.C., Le sous-bassin nord-lusitanien (Portugal) du Trias au Jurassique moyen: Histoire d'un "rift avorté" (1993) Comptes rendus de l'Académie des sciences de Paris, 317, pp. 1659-166
Vacuum Insulation Panels Applied in Building Constructions
No full textDue to sustainability and due to international treaties, it is desired and required to reduce greenhouse gas emissions drastically. One contributor to these emissions is the burning of fossil fuels for generating power and electricity to be used in and for buildings. Buildings and building-related processes are responsible for about 40% of the primary energy consumption in the European Union. More than half of this energy is applied for heating systems in dwellings and commercial buildings. The European Union therefore has laid down new energy performance requirements for buildings in the European Directive on the Energy Performance of Buildings. Moreover, a reduction of energy losses of buildings during their occupational phase is important for facilitating the implementation of sustainable energy sources in the built environment. Increasing the insulation value of the envelope of buildings may contribute to this reduction of primary energy use. Two strategies can be followed. The first strategy is to increase the thickness of the thermal insulation layer. Until recently, this strategy has primarily been adopted. If, however, German or Swiss Passivhaus standard is applied, the thickness of this insulation layer would increase to beyond 30 cm, resulting in very thick building enclosures. The second, more innovative, strategy for reducing energy losses through the building skin would be the application of more effective thermal insulators. One such more effective thermal insulator is a vacuum insulation panel, abbreviated as VIP. A VIP consists of an open-celled core material which is evacuated and then tightly sealed into a barrier envelope to maintain this vacuum. The vacuum inside the pores of the core material reduces the thermal conductivity of the product significantly, as a result of which the thickness of the insulation layer can be reduced to obtain a certain performance. This reduction of thickness is among the most promising features for large-scale application of VIPs in the building industry. However, integration of VIPs into buildings must be performed very meticulously for several reasons; first, due to its nature a VIP cannot be processed on site and needs careful planning in advance; second, it is very sensitive to mechanical damage thus requiring careful handling; third, thermal bridges along the panel’s edges reduce its performance; fourth, the composite system is highly subjected to aging. This dissertation therefore looks into many of these aspects, presents several calculation tools and shows how VIPs can be applied in façade panels, EPS insulation boards and as under-floor insulation. With the wide-spread proliferation of VIPs in buildings a more sustainable and healthy environment can then be achieved.Building TechnologyArchitectur
Book Review: Reginald M.J. Oduor’s Introduction to Ethics
No full textTITLE OF BOOK: Introduction to Ethics
AUTHOR: Reginald M.J. Oduor
Nairobi: Sophia Publications Ltd., 2009, 116 pages
COVER: Paperback
ISBN: 9966-7457-0-X
This book is a product of more than a decade of Oduor’s experience in teaching ethics (moral philosophy) at the University of Nairobi. In the course of this introduction, the reader gets to see the techniques of philosophic reflection in action, as they are employed to scrutinise various pertinent moral questions
Comments on “Precipitation kinetics of Al–1.12Mg2Si–0.35Si and Al–1.07Mg2Si–0.33Cu alloys”
No full textIt is shown that in analysing DSC data of precipitation reactions in Al–1.12Mg2Si–0.35Si, Al–1.07Mg2Si–0.33Cu and Al–1.0Mg2Si–0.5Ag alloys in work by Gaber et al., accurate values for the activation energies are obtained by applying the method derived by the present author (the Type B-1.92 method). Values obtained from other analysis methods reported by Gaber et al. are less accurate. Averaging activation energies obtained by different methods introduces inaccuracies and obscures these inaccuracies, especially if the set of methods applied includes highly inaccurate ones, such as the Ozawa and Takhor methods
Optical Flow Based State Estimation for an Indoor Micro Aerial Vehicle
No full textThis work addresses the problem of indoor state estimation for autonomous flying vehicles with an optic flow approach. The paper discusses a sensor configuration using six optic flow sensors of the computer mouse type augmented by a three-axis accelerometer to estimate velocity, rotation, attitude and viewing distances. It is shown that the problem is locally observable for a moving vehicle. A Kalman filter is used to extract these states from the sensor data. The resulting approach is tested in a simulation environment evaluating the performance of three Kalman filter algorithms under various noise conditions. Finally, a prototype of the sensor hardware has been built and tested in a laboratory setup. Paper published: Verveld, M.J., Chu, Q.P., De Wagter, C. and Mulder, J.A. “Optic Flow Based State Estimation for an Indoor Micro Air Vehicle” AIAA Guidance, Navigation, and Control Conference, August 2010, Toronto, Canada AIAA 2010-8209, DOI: 10.2514/6.2010-8209Aerospace EngineeringControl & Simulatio
Transient time-averaged spectra of rapidly-modulated semiconductor lasers
No full textUsing the computed solution of multimode rate equations, and including wavelength-chirping effects via the dependence of the refractive index on carrier concentration, it is possible to calculate time-averaged spectra of rapidly-modulated lasers. The averaging time may be used to simulate the effects of measuring equipment with a specific time response. The results show a characteristic line structure within the dominant longitudinal mode spectrum, and are in qualitative agreement with experimental measurements reported by other author
Gift inscription in Minions of the Moon: a little book of song and story
No full textThis edition includes a gift inscription possibly penned by the author, Madison Julius Cawein, "Frank on Valentines Day, 1914. M.J." Madison Julius Cawein (1865-1914).Cawein, Madison Julius, 1865-1914
Cooling and heating rate dependence of precipitation in an Al-Cu alloy
No full textDifferential scanning calorimetry and X-ray diffraction were used to study the cooling and heating rate dependence of precipitation in an Al-1.66 at.% Cu alloy. After homogenizing, cooling at a rate of 22 K min?1 (SC22) is sufficient to retain all copper in solid solution. GP-zone formation during subsequent heat treatment is hindered; this is ascribed to an insufficient number of (excess) vacancies. After a water quench (WQ) a large number of GP zones are formed during subsequent storage at room temperature for 1 h. The heat content of the GP-zone dissolution effect can quantitatively be described in terms of the heat of precipitation of GP I zones and the solid solubilities as derived from the GP I zone solvus. The heat content of the combined ??-/?-phase precipitation effect appeared to be proportional to the number of copper atoms precipitated, yielding an average value for the heat of copper precipitation of 36 kJ mol?1 copper. The activation energy for ??-phase formation is 0.75 eV for SC22 specimens and 1.10 ± 0.10 eV for WQ specimens. The differences in reported activation energies for ??-phase formation are discussed in terms of mobility of dissolve atoms (related to the vacancy concentration), interfacial energy and direction of growth (normal or perpendicular to the ??-phase plate)
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
No full textIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
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