177,475 research outputs found
El crédito y la industria : El Banco de Crédito Industrial Argentino frente a los antecedentes nacionales y extranjeros
No full textFil: Caram, Angel R.. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Buenos Aires, Argentina
Mechanical Properties And Fracture Behavior Of Directionally Solidified Nial-v Eutectic Composites
No full textFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Directional solidification of eutectic alloys has been recognized as promising technique for producing in situ composite materials exhibiting balance of properties. Therefore, an in situ NiAl-V eutectic composite has been successfully directionally solidified using Bridgman technique. The mechanical behavior of the composite including fracture resistance, microhardness, and compressive properties at room and elevated temperatures was investigated. Damage evolution and fracture characteristics were also discussed. The obtained results indicate that the NiAl-V eutectic retains high yield strength up to 1073 K (800 °C), above which there is a rapid decrease in strength. Its yield strength is higher than that of binary NiAl and most of the NiAl-based eutectics. The exhibited fracture toughness of 28.5 MPa√m is the highest of all other NiAl-based systems investigated so far. The material exhibited brittle fracture behavior of transgranular type and all observations pointed out that the main fracture micromechanism was cleavage.462557565FAPESP; São Paulo Research FoundationFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Miracle, D.B., (1993) Acta Metall. Mater., 41, pp. 649-684Noebe, R.D., Bowman, R.R., Nathal, M., (1993) Int. Mater. Rev., 38, pp. 193-231Misra, A., Gibala, R., (1997) Metall. Mater. Trans. A, 28A, pp. 795-807Mendiratta, M.G., Levandowski, J.J., Dimiduk, D.M., (1991) Metall. Trans. A, 22A, pp. 1573-1583Frommeyer, G., Rosenkranz, R., Ludecke, C., (1991) Zeit. Metallkd., 81, pp. 307-313Whittenberger, J.D., Noebe, R.D., Johnson, D.R., Oliver, B.F., (1997) Intermetallics, 5, pp. 173-183Jiang, D.T., Guo, J.T., (1998) Mater. Sci. Eng. A, 225, p. 154Guo, J.T., Cui, C.Y., Chen, Y.X., Li, D.X., Ye, H.Q., (2001) Intermetallics, 9, pp. 287-297Heredia, F.E., He, M.Y., Lucas, G.E., Evans, A.G., Dève, H.E., (1993) Acta Metall. Mater., 41, pp. 505-511Subramanian, P.R., Mendiratta, M.G., Miracle, D.B., (1994) Metall. Mater. Trans. A, 25A, pp. 2769-2781Misra, A., Gibala, R., Noebe, R.D., (2001) Intermetallics, 9, pp. 971-978Cui, C.Y., Guo, J.T., Qi, Y.H., Ye, H.Q., (2004) Mater. Sci. Eng. A, 385, pp. 359-366Bei, H., George, E.P., (2005) Acta Mater., 53, pp. 69-77Zeumert, B., Sauthoff, G., (1997) Intermetallics, 5, pp. 563-577Ferrandini, P.L., Araujo, F.L.G.U., Batista, W.W., Caram, R., (2005) J. Cryst. Growth, 275, pp. 147-152Pellegrini, P.W., Huta, J.J., (1977) J. Cryst. Growth, 42, pp. 536-539Cotton, J.D., Kaufman, M.J., (1991) Scripta Metall. Mater., 25, pp. 1827-1836Joslin, S.M., Chen, X.F., Oliver, B.F., Noebe, R.D., (1995) Mater. Sci. Eng. A, 196, pp. 9-18Milenkovic, S., Coelho, A.A., Caram, R., (2000) J. Cryst. Growth, 211, pp. 485-490Milenkovic, S., Caram, R., (2002) Mater. Lett., 55, pp. 126-131Milenkovic, S., Caram, R., (2003) J. Mater. Proc. Technol., 143-144, pp. 629-635Hunt, J.D., Jackson, K.A., (1966) Trans. Met. Soc. AIME, 236, pp. 843-852Hunt, J.D., Chilton, J.P., (1962) J. Inst. Met., 91, pp. 338-345Darolia, R., (1991) J. Met., 43, pp. 44-49Walter, J.L., Cline, H.E., (1970) Metall. Trans., 1, pp. 1221-1229(2002) MRS Proc., , G. Frommeyer and R. Rablbauer, vol. 753, BB4.6Johnson, D.R., Joslin, S.M., Oliver, B.F., Noebe, R.D., Whittenberger, J.D., (1995) Intermetallics, 3, pp. 99-113Subramanian, P.R., Mendiratta, M.G., D.B. Miracle, and D.M (1990) Dimiduk: in MRS Symposium on Intermetallic Matrix Composites II, 194, pp. 147-154(1991) ASTM, Philadelphia, , Annual Book of ASTM Standards: “Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials”: E-399-90, , PA, vol. 03.01, p. 485Hertzberg, R.W., (1996) Deformation and Fracture Mechanics of Engineering Solids, pp. 164-201. , Wiley, New York
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Letter from R. R. Zellick, Assistant Trust Officer, Anglo California National Bank of San Francisco, to Joseph R. Goodman, October 2, 1942
No full textLetter from R. R. Zellick, Assistant Trust Officer at The Anglo California National Bank of San Francisco, to Joseph R. Goodman, regarding property owned by Dave Tatsuno. Zellick mentions a dispute between current tenants and Tatsuno, and that Tatsuno has asked Goodman to help locate trustworthy tenants.Personal correspondence, organizational records, government documents, publications, and other papers created or collected by Joseph R. Goodman documenting the forced removal and incarceration of Japanese Americans during World War II, as well as organized resistance to incarceration. Included in the collection are records of the Japanese Young Men's Christian Association and the Japanese American Citizens' League in San Francisco, including papers of the Japanese YMCA's executive secretary Lincoln Kanai; Sakai family papers; Goodman's correspondence to and from Japanese American incarcerees, organizations opposing forced removal and incarceration of Japanese Americans, the War Relocation Authority, and others; publications, photographs, and ephemera from the Topaz Relocation Center, where Goodman taught high school; War Relocation Authority records and publications; and newspaper clippings, pamphlets, and reports about forced removal and incarceration created by various government, religious, and civic organizations, in California and nationwide
Salário mínimo vai a R 2,9 bi no Orçamento
No full textReajusto de 11,67% injetará R 4.663 para R$ 5.203 de acordo com o Ministério do Trabalh
Slow-Injection Growth of Seeded CdSe/CdS Nanorods with Unity Fluorescence Quantum Yield and Complete Shell to Core Energy Transfer
No full textA two-step process has been developed
for growing the shell of
CdSe/CdS core/shell nanorods. The method combines an established fast-injection-based
step to create the initial elongated shell with a second slow-injection
growth that allows for a systematic variation of the shell thickness
while maintaining a high degree of monodispersity at the batch level
and enhancing the uniformity at the single-nanorod level. The second
growth step resulted in nanorods exhibiting a fluorescence quantum
yield up to 100% as well as effectively complete energy transfer from
the shell to the core. This improvement suggests that the second step
is associated with a strong suppression of the nonradiative channels
operating both before and after the thermalization of the exciton.
This hypothesis is supported by the suppression of a defect band,
ubiquitous to CdSe-based nanocrystals after the second growth
Interstitial Element Influence On The Biocompatibility Of Ti-35nb-7zr-5ta Alloys
No full text[No abstract available]2848Donato, T.A.G., Santos Jr., A.R., Arruda, M.S.P., Grandini, C.R., (2005) Brazilian Journal of Morphological Science, SUP, pp. 280-328Donato, T.A.G., Almeida, L.H., Nogueira, R.A., Niemeyer, T.C., Grandini, C.R., Caram Jr., R., Claro, A.P.R.A., Santos Jr., A.R., (2007) Materials Science and Engineering A, , submitted toGeetha, M., Singh, A.K., Muraleedharan, K., Gogia, A.K., (2001) Asokamani, Journal of Alloys and Compounds, 329, p. 264Khan, M.A., Willians, R.L., Willians, D.F., (1996) Biomaterials, 17, p. 2117Long, M., Rack, H.J., (1998) Biomaterials, 19, p. 1621Niinomi, M., (1998) Materials Science and Engineering A, 243, p. 231Wang, K., (1996) Materials Science and Engineering A, 213, p. 13
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
