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283 results on '"Alonzo, F."'

1. Evolución microestructural de capas delgadas de cobre por flujo de corriente eléctrica aplicada

Author

Quintana, P., Oliva, A. I., Alonzo, F., Corona, J. E., and Cauich, W.

Subjects
Copper, thin films, XRD, AFM, Auger spectroscopy, Cobre, capas delgadas, DRX, MFA, espectroscopía Auger, Clay industries. Ceramics. Glass, TP785-869
Abstract

The microstructural evolution during electrical current flow application on copper thin films was studied. The morphological analysis by atomic force microscopy (AFM), and the structural analysis by grazing incidence X-ray diffraction (XRD) were realized when an electrical current between 0 and 2.2A was applied in situ on films by means of electrodes located on films. Positions of peaks diffraction of the asdeposited film were found to be larger than the 2θ copper standard value, with a further decrement with the applied current. Cuprite (Cu2O) is formed when the current is hold for longer times and/or when high current values are applied, favouring the oxidation process. Morphological images show that grain size is modified when the current is applied; meanwhile the rms-rugosity, initially diminishes and after that, increases due to the high current values forming Cu2O on surface. Copper oxidation was studied by Auger spectroscopy and XRD.Se estudió la evolución microestructural superficial, durante el paso de corriente eléctrica, en capas delgadas de cobre. El análisis morfológico se realizó con microscopía de fuerza atómica (MFA), y la estructura por difracción de rayos X (DRX) con geometría de haz rasante, aplicando “in situ” un flujo de corriente DC entre 0 y 2.2A a través de electrodos colocados en los extremos de las capas. En muestras recién crecidas, se observaron picos de difracción desplazados a valores mayores de 2θ respecto del estándar de cobre, mismos que se acercan hacia el valor estándar conforme la corriente es incrementada. Se encontró que el flujo de corriente prolongado, así como los altos valores de corriente aplicada, favorecen el proceso de oxidación del cobre, formando cuprita (Cu2O). Morfológicamente se observó que el flujo de corriente modifica el tamaño del grano; mientras que el valor rms de la rugosidad, disminuye inicialmente para luego incrementarse debido a la formación del Cu2O. La oxidación del cobre fue estudiada por espectroscopía Auger y por DRX.

Published
2004

4. Constructive Habituation as an Educational Approach to Process-Object Reification in Mathematics

Author

Alonzo F. Peterson

Abstract

Sfard and Thompson (1994) state that what matters most is that educators develop ways of thinking, teaching, and learning mathematics. This study introduced constructive habituation, a new strategy developed to aid both students and teachers in the thinking, teaching, and learning of mathematics. Constructive habituation attempts to unite constructivist teaching methods aimed at supporting students' conceptual understanding of content and habituationist teaching method aimed at establishing routine responses to routine tasks. This study is exploratory in nature, designed to investigate if constructive habituation is a more effective means than a traditional teaching method in helping students reach process-object reification as evidenced by higher levels of student achievement. The study primarily addressed introductory function concepts and symmetry and transformations of functions. The subjects were university students enrolled in a precalculus I course. The results indicated that constructive habituation was not a more effective means in helping students reach process-object reification than a traditional teaching method. No significant differences were found for any of the variables examined. However, some promising practical results were revealed. The students taught using the experimental method averaged more than nine points higher than the students taught using a more traditional teaching method on an examination that evaluated their understandings of the relationship between changes made to the graph of a function and changes made to its formula. Explanations on why constructive habituation may not have reached its intended goal are given. A discussion is presented of the developmental stage at which constructive habituation may become an effective pedagogical method. Study also includes a brief history of the major pedagogical movements over the last half century and the psychological perspectives that influenced each. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]

Published
2004

5. Iside verso l'impero: metamorfosi di una dea

Author

Basello, G. P., Biga, M. G., Bonechi, M., Borrelli, N., Catagnoti, A., Contini, R., Criscuolo, A., D'Alonzo, F., De Martino, S., Devecchi, E., Fales, F. M., Hartman, D., Lacerenza, G., Loreto, R., Marchesi, G., Mora, C., Pirelli, R., Ponchia, S., Rosmano, L., D'Agostino, F., Verderame, L., and Zaccagnini, C.

Published
2022

23. Editorial

Author

Myers, Alonzo F.

Published
1944

34. Isolation and Identification of an Antimutagenic Phthalate Derivative Compound from Octopus (Paraoctopus limaculatus)

Author

Cruz-Ramírez, SG, López-Saiz, CM, Plascencia-Jatomea, M, Machi-Lara, L, Rocha-Alonzo, F, Márquez-Ríos, E, and Burgos-Hernández, A

Subjects
Octopus, Anti-Mutagenic, Paraoctopus limaculatus, 1-Butyl-2-isobutyl-phthalate
Abstract

Purpose: To isolate and evaluate the antimutagenic properties of compounds previously identified in octopus (Paraoctopus limaculatus).Methods: Octopus fractions, previously obtained by a sequential thin layer chromatography (TLC) procedure, were subjected to further fractionation by TLC and their anti-mutagenic activity monitored using Salmonella tester strains TA98 and TA100 with metabolic activation (S9) in Ames test. The isolated fractions were subjected to structural studies by Fourier transformed infrared spectroscopy (FTIR), nuclear magnetic resonance (1H and 13C NMR), and gas chromatography-mass spectrometry.Results: Five new fractions were obtained from a previously isolated and reported anti-mutagenic octopus fraction. Fractions RB21321b2 and RB21321b3 inhibited > 80 % of the mutagenicity induced by 500 ng AFB1 on both tester strains and were selected for chemical/structural characterization. Data from IR and 1H and 13C NMR suggested the presence of phthalate type of compounds. GC-MS analysis revealed 278 m/z for both fractions which is consistent with a butyl isobutyl phthalate structure.Conclusion: Based on the findings, the compound responsible for the high anti-mutagenic activity of the isolated fraction from octopus is 1-butyl-2-isobutyl-phthalate.Keywords: Octopus, Anti-Mutagenic, Paraoctopus limaculatus, 1-Butyl-2-isobutyl-phthalate

Published
2015

35. An invitation to contribute to a strategic research agenda in radioecology

Author

Hinton, T.G., Garnier-Laplace, J., Vandenhove, H., Dowdall, M., Adam-Guillermin, C., Alonzo, F., Barnett, C., Beaugelin-Seiller, K., Beresford, N.A., Bradshaw, C., Brown, J., Eyrolle, F., Fevrier, L., Gariel, J.-C., Gilbin, R., Hertel-Aas, T., Horemans, N., Howard, B.J., Ikäheimonen, T., Mora, J.C., Oughton, D., Real, A., Salbu, B., Simon-Cornu, M., Steiner, M., Sweeck, L., and Vives i Batlle, J.

Published
2013
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39. STAR deliverable (D-No. 2.5). Strategic research agenda for radioecology: an updated version with stakeholder input

Author

Hinton, T.G., Garnier-Laplace, J., Vandenhove, H., Dowdall, M., Adam-Guillermin, C., Alonzo, F., Barnett, C.L., Beaugelin-Seiller, K., Beresford, N.A., Bradshaw, C., Brown, J., Eyrolle, F., Fevrier, L., Gariel, J.-C., Gilbin, R., Horemans, N., Howard, B.J., Ikaheimonen, T., Liland, A., Mora, J.C., Oughton, D., Real, A., Salbu, B., Simon-Cornu, M., Steiner, M., Sweeck, J., Vivies i Battle, J., Hinton, T.G., Garnier-Laplace, J., Vandenhove, H., Dowdall, M., Adam-Guillermin, C., Alonzo, F., Barnett, C.L., Beaugelin-Seiller, K., Beresford, N.A., Bradshaw, C., Brown, J., Eyrolle, F., Fevrier, L., Gariel, J.-C., Gilbin, R., Horemans, N., Howard, B.J., Ikaheimonen, T., Liland, A., Mora, J.C., Oughton, D., Real, A., Salbu, B., Simon-Cornu, M., Steiner, M., Sweeck, J., and Vivies i Battle, J.

Published
2014

40. Conséquences écologiques d'une exposition chronique à l'uranium

Author

Adam, C., Alonzo, F., Bonzom, J.-M., Gilbin, R., Garnier-Laplace, J., Simon, O., Service d'Etude du Comportement des Radionucléides dans les Ecosystèmes, and Institut de Radioprotection et de Sûreté Nucléaire (IRSN)

Subjects
[SDV]Life Sciences [q-bio]
Published
2008

41. An invitation to contribute to a strategic research agenda in radioecology

Author

Hinton, T. G., Garnier-Laplace, J., Vandenhove, H., Dowdall, M., Adam-Guillermin, C., Alonzo, F., Barnett, C., Beaugelin-Seiller, K., Beresford, N. A., Bradshaw, Clare, Brown, J., Eyrolle, F., Fevrier, L., Gariel, J. -C, Gilbin, R., Hertel-Aas, T., Horemans, N., Howard, B. J., Ikaheimonen, T., Mora, J. C., Oughton, D., Real, A., Salbu, B., Simon-Cornu, M., Steiner, M., Sweeck, L., Vives i Batlle, J., Hinton, T. G., Garnier-Laplace, J., Vandenhove, H., Dowdall, M., Adam-Guillermin, C., Alonzo, F., Barnett, C., Beaugelin-Seiller, K., Beresford, N. A., Bradshaw, Clare, Brown, J., Eyrolle, F., Fevrier, L., Gariel, J. -C, Gilbin, R., Hertel-Aas, T., Horemans, N., Howard, B. J., Ikaheimonen, T., Mora, J. C., Oughton, D., Real, A., Salbu, B., Simon-Cornu, M., Steiner, M., Sweeck, L., and Vives i Batlle, J.

Abstract

With intentions of integrating a portion of their respective research efforts into a trans-national programme that will enhance radioecology, eight European organisations recently formed the European Radioecology ALLIANCE (www.er-alliance.org). The ALLIANCE is an Association open to other organisations throughout the world with similar interests in promoting radioecology. The ALLIANCE members recognised that their shared radioecological research could be enhanced by efficiently pooling resources among its partner organizations and prioritising group efforts along common themes of mutual interest. A major step in this prioritisation process was to develop a Strategic Research Agenda (SRA). An EC-funded Network of Excellence in Radioecology, called STAR (Strategy for Allied Radioecology), was formed, in part, to develop the SRA. This document is the first published draft of the SRA. The SRA outlines a suggested prioritisation of research topics in radioecology, with the goal of improving research efficiency and more rapidly advancing the science. It responds to the question: What topics, if critically addressed over the next 20 years, would significantly advance radioecology? The three Scientific Challenges presented within the SRA, with their 15 associated research lines, are a strategic vision of what radioecology can achieve in the future. Meeting these challenges will require a directed effort and collaboration with many organisations the world over. Addressing these challenges is important to the advancement of radioecology and in providing scientific knowledge to decision makers. Although the development of the draft SRA has largely been a European effort, the hope is that it will initiate an open dialogue within the international radioecology community and its stakeholders. This is an abbreviated document with the intention of introducing the SRA and inviting contributions from interested stakeholders. Critique and input for improving the SRA are welcomed via a, AuthorCount:27

Published
2013
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42. Una invitacion para contribuir a la agenda estrategica de investigacion en radioecologia

Author

Hinton, T.G., Garnier-Laplace, J., Vandenhove, H., Dowdall, M., Adam-Guillermin, C., Alonzo, F., Barnett, C., Beaugelin-Seiller, K., Beresford, N.A., Bradshaw, C., Brown, J., Eyrolle, F., Fevrier, L., Gariel, J.C., Gilbin, R., Hertel-Aas, T., Horemans, N., Howard, B.J., Ikaheimonen, T., Mora, J.C., Oughton, D., Real, A., Salbu, B., Simon-Cornu, M., Steiner, M., Sweeck, L., Vives i Batlle, J., Hinton, T.G., Garnier-Laplace, J., Vandenhove, H., Dowdall, M., Adam-Guillermin, C., Alonzo, F., Barnett, C., Beaugelin-Seiller, K., Beresford, N.A., Bradshaw, C., Brown, J., Eyrolle, F., Fevrier, L., Gariel, J.C., Gilbin, R., Hertel-Aas, T., Horemans, N., Howard, B.J., Ikaheimonen, T., Mora, J.C., Oughton, D., Real, A., Salbu, B., Simon-Cornu, M., Steiner, M., Sweeck, L., and Vives i Batlle, J.

Abstract

With intentions of integrating a portion of their respective research efforts into a trans-national programme that will enhance radioecology, eight European organisations recently formed the European Radioecology ALLIANCE (www.er-alliance.org). The ALLIANCE is an Association open to other organisations throughout the world with similar interests in promoting radioecology. The ALLIANCE members recognised that their shared radioecological research could be enhanced by efficiently pooling resources among its partner organizations and prioritising group efforts along common themes of mutual interest. A major step in this prioritisation process was to develop a Strategic Research Agenda (SRA). An EC-funded Network of Excellence in Radioecology, called STAR (Strategy for Allied Radioecology), was formed, in part, to develop the SRA. This document is the first published draft of the SRA. The SRA outlines a suggested prioritisation of research topics in radioecology, with the goal of improving research efficiency and more rapidly advancing the science. It responds to the question: “What topics, if critically addressed over the next 20 years, would significantly advance radioecology?” The three Scientific Challenges presented within the SRA, with their 15 associated research lines, are a strategic vision of what radioecology can achieve in the future. Meeting these challenges will require a directed effort and collaboration with many organisations the world over. Addressing these challenges is important to the advancement of radioecology and in providing scientific knowledge to decision makers. Although the development of the draft SRA has largely been a European effort, the hope is that it will initiate an open dialogue within the international radioecology community and its stakeholders. This is an abbreviated document with the intention of introducing the SRA and inviting contributions from interested stakeholders. Critique and input for improving the SRA are welcomed via

Published
2013

43. Strategic research agenda for radioecology: a second version with stakeholder input

Author

Hinton, T.G., Garnier-Leplace, J., Vandenhove, H., Dowdall, M., Adam­ Guillermin, C., Alonzo, F., Barnett, C.L, Beaugelin­-Seiller, K., Beresford, N.A., Bradshaw, C., Brown, J., Eyrolle, F., Fevrier, L, Gariel, J.-C., Gilbin, R., Horemans, N., Howard, B.J., Ikäheimonen, T., Liland, A., Mora, J.C., Oughton, D., Real, A., Salbu, B., Simon-­Cornu, M., Steiner, M., Sweeck, L., Vives i Battle, J., Hinton, T.G., Garnier-Leplace, J., Vandenhove, H., Dowdall, M., Adam­ Guillermin, C., Alonzo, F., Barnett, C.L, Beaugelin­-Seiller, K., Beresford, N.A., Bradshaw, C., Brown, J., Eyrolle, F., Fevrier, L, Gariel, J.-C., Gilbin, R., Horemans, N., Howard, B.J., Ikäheimonen, T., Liland, A., Mora, J.C., Oughton, D., Real, A., Salbu, B., Simon-­Cornu, M., Steiner, M., Sweeck, L., and Vives i Battle, J.

Published
2013

45. The dis(k)located communicator

Author

Carroll, Joan and Cobb, Jr., Alonzo F.

Subjects
International Association of Business Communicators -- Surveys, Communication World (Periodical) -- Surveys -- Research, Desktop publishing -- Research -- Surveys, Business, general, Business, Human resources and labor relations, Desktop publishing technology, Research, Surveys
Abstract

THE DIS(K)LOCATED COMMUNICATOR Measuring the impact of desktop publishing on a communicator's job was the purpose of the Summer 1989, 'Desktop Publishing Survey' conducted by Communication World. For this survey, [...]

Published
1989

47. Editorial

Author

Myers, Alonzo F.

Published
1958

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