6,335 research outputs found
The testing of an H-infinity roll stabilisation controller through experimental and numerical analysis
No full textExperimental analysis of catamaran forms with bulbous bows operating in shallow water
No full textIn recent years fast ferries which are capable of speeds in excess of 40 knots have been operational in water of depth of less than 10 m. As high-speed operations near sensitive shorelines increase, complaints from the public on extensive wave wake or wake wash from these fast vessels have increased. Although the leading waves in the wash are very small in terms of wave amplitude compared to storm waves, they have a very long period and build in height rapidly in shallow water at the shoreline thereby causing substantial surges on beaches as well as breaching sea walls at high tide. This wake wash is likely to have environmental effects such as shoreline erosion as well as endangering swimmers and small boats
Detergency in Liquid CO2
No full textIn this dissertation we study Detergency in liquid Carbon Dioxide. Detergency is the cleaning performance of additives, surfactants in particular, in washing fluids. Liquid CO2 is under consideration, for environmental and toxicological reasons, to replace perchloro-ethylene as the solvent in textile dry cleaning technology. Inherent problems of such a transition were confronted with the methodology of chemical engineering design. The Basic Cycle of Design (BCD) approach was used as a pathway for designing a detergent. The BCD also establishes the structural framework of the thesis, which can, therefore, be read as records from a successful product engineering project, in which an effective detergent has been designed for a new dry cleaning solvent. The Dynamic Detergency Model (DDM), which succeeds to explain the role of surfactants in the washing operation, is used as a rational starting point for the design of a detergent in liquid CO2. According to this model, such a surfactant must be: sparingly soluble in the solvent, surface-active and able to form micelles in the solution. The different experiments carried out (solubility, interfacial-tension and dye solubilisation measurements), show that a number of molecules of the homologous polyoxyethylene/alkane series, generally described by the shorthand formula CiEj did indeed behave as surfactants and can be then considered detergents for liquid CO2. In the technical evaluation of the detergents, at laboratory as well as at semi-pilot scale, high washing performances were obtained. They are, indeed, as good for dry cleaning textiles as the present perchloro-ethylene (Perc) technology.Applied Science
'Her Irish Heritage' : Annie M.P Smithson and autobiography
No full textThis paper examines some aspects of the work of Annie M.P. Smithson, the author of 21 romance novels between 1917 and 1946. Her attitudes towards women, religion and politics are explored, and the importance of autobiography in her fiction discussed.Cet article analyse divers aspects de l'oeuvre d'Annie M.P. Smithson, l'auteur de vingt et un romans 'romanesques' publiés entre 1917 et 1946. Il étudie son attitude concernant les femmes, la religion, la politique, ainsi que le rôle de l'autobiographie dans sa fiction.Walsh Oonagh. 'Her Irish Heritage' : Annie M.P Smithson and autobiography. In: Études irlandaises, n°23-1, 1998. pp. 27-42
Il ruolo della linguistica in un'iniziativa di internazionalizzazione
No full textThe author deals with the role of linguistic sciences and language teaching in the internationalization project of an e-learning Specialization Course
Chemical Drawings Correlate To Biological Properties: Mia-qsar. [desenhos De Estruturas Químicas Correlacionam-se Com Propriedades Biológicas: Mia-qsar]
No full textDescriptors in multivariate image analysis applied to quantitative structure-activity relationship (MIA-QSAR) are pixels of bidimensional images of chemical structures (drawings), which were used to model the trichomonicidal activities of a series of benzimidazole derivatives. The MIA-QSAR model showed good predictive ability, with r 2 r, q 2 r and r val and 2r of 0.853, 0.519 and 0.778, respectively, which are comparable to the best values obtained by CoMFA e CoMSIA for the same series. A MIA-based analysis was also performed by using images of alphabetic letters with the corresponding numeric ordering as dependent variables, but no correlation was found, supporting that MIA-QSAR is not arbitrary.35611571163Hansch, C., Muir, R.M., Fujita, T., Maloney, P.P., Geiger, C.F., Streich, M.J., (1963) J. Am. Chem. Soc., 85, p. 2817Hansch, C., Fujita, T., (1964) J. Am. Chem. Soc., 86, p. 1616Free, S.M., Wilson, J.W., (1964) J. Med. Chem., 7, p. 395Cramer, R.D., Patterson, D.E., Bunce, J.D., (1988) J. Am. Chem. Soc., 110, p. 5959Klebe, G., Abraham, U., Mietzner, T., (1994) J. Med. Chem., 37, p. 4130Hopfinger, A.J., Wang, S., Tokarski, J.S., Jin, B., Albuquerque, M., Madhav, P.J., Duraiswami, C., (1997) J. Am. Chem. Soc., 119, p. 10509Vedani, A., Dobler, M., (2002) J. Med. Chem., 45, p. 2139Vedani, A., Dobler, M., Lill, M.A., (2005) J. Med. Chem., 48, p. 3700Tian, F., Zhou, P., Li, Z., (2001) J. Mol. Struct., 871, p. 7140Freitas, M.P., Brown, S.D., Martins, J.A., (2005) J. Mol. Struct., 738, p. 149Freitas, M.P., (2006) Org. Biomol. Chem., 4, p. 1154Freitas, M.P., (2007) Curr. Comput.-Aid. Drug Des., 3, p. 235Freitas, M.P., (2008) Chemom. Intell. Lab. Sys., 91, p. 173Goodarzi, M., Freitas, M.P., (2009) Chemom. Intell. Lab. Sys., 96, p. 59Goodarzi, M., Freitas, M.P., (2010) Mol. Simul., 36, p. 267Cormanich, R.A., Freitas, M.P., Rittner, R., (2011) J. Braz. Chem. Soc., 22, p. 637Goodarzi, M., Freitas, M.P., (2008) J. Phys. Chem. A, 112, p. 11263Goodarzi, M., Freitas, M.P., Ramalho, T.C., (2009) Spectrochim. Acta, Part A, 74, p. 563Goodarzi, M., Freitas, M.P., (2009) Separ. Purif. Technol., 68, p. 363Pérez-Villanueva, J., Medina-Franco, J.L., Caulfield, T.R., Hernández-Campos, A., Hernández-Luis, F., Yépes-Mulia, L., Castillo, R., (2011) Eur. J. Med. Chem., 46, p. 3499(2009) ACD/ChemSketch, , Version 12.01, Advanced Chemistry Development, Inc., Toronto, CanadaGoodarzi, M., Freitas, M.P., Ferreira, E.B., (2009) QSAR Comb. Sci., 28, p. 458(2005) MatLab, , Version 7.5, MathWorks Inc., Natick, MAGolbraikh, A., Tropsha, A., (2002) J. Mol. Graphics Modell., 20, p. 269Pinheiro, J.R., Bitencourt, M., Da Cunha, E.F.F., Ramalho, T.C., Freitas, M.P., (2008) Bioorg. Med. Chem., 16, p. 1683Antunes, J.E., Freitas, M.P., Da Cunha, E.F.F., Ramalho, T.C., Rittner, R., (2008) Bioorg. Med. Chem., 16, p. 759
The influence of steady blowing and roughness on transitional separated boundary layers
No full textThis paper presents the results of a study between two types of forcing, namely steady blowing and a tripwire, on the control of laminar separated boundary layers. The analysis focuses on the differences in the transition process between these two types of forcing. This effect will be studied using direct numerical simulation. The main differences consists in the coherent structures formed during transition and the overall kinetic energy growth
Gusmani grecista
No full textThe author deals with the Roberto Gusmani's works about Ancient Greek language
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