177,038 research outputs found
Dighe della Sardegna
No full textLa realizzazione di un sistema di dighe e di infrastrutture per la distribuzione idrica ed elettrica nella Sardegna del primo Novecento venne progettata da Angelo Omodeo. Lombardo di nascita l’ingegnere Omodeo (1876-1941) intendeva risolvere alcuni tra i problemi che da sempre affliggevano la Sardegna: la presenza di vaste aree paludose e malarigene, la carenza di acqua, l’assenza di risorse energetiche. A partire dai suoi studi la storia delle bonifiche in Sardegna s’intrecciava con quella delle dighe, possenti strutture chiamate a razionalizzare la raccolta, il deflusso e l’uso delle acque accumulate in grandi invasi artificiali. All’ingegnere si deve la progettazione dei primi grandi sbarramenti — la diga sul Tirso a lungo fu la più grande d’Europa — che, chiamati ad assumere molteplici funzioni, erano realizzati tanto per favorire lo sviluppo dell’economia agraria e industriale, quanto per fare fronte ai bisogni di energia elettrica e di acqua potabile. Le sue tesi furono quindi decisive nell’avviare a soluzione la secolare questione idraulica in Sardegna; si rivelarono, invece, insufficienti a eliminare la malaria – del tutto eradicata dall’isola solo nel secondo dopoguerra –, e a risolvere gli squilibri ambientali, economici e sociali che connotavano il rapporto tra popolazione e territorio, tra campagne, rendita fondiaria e comunità contadine
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.
Real-time three-dimensional echocardiographic quantification of left ventricular mass: comparison with magnetic resonance imaging
No full textGoing 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
Conjugated diene and trans fatty acids in tissue lipids of rats fed an hepatocarcinogenic choline-devoid diet
No full textConjugated diene and trans fatty acids in a choline-devoid diet hepatocarcinogenic in the rat
No full textClimate policies : what if emerging country baseline were not so optimistic? - a case study related to India
No full textOne of the current main objective of international negotiations on climate change aims at enlarging the coordination regime to developing countries (DCs), and particularly to emerging countries. The international coordination system built at the Kyoto Conference relies on a coordination system based on a purely climate centric approach which shows irreconcilable contradictions between climate and development issues. This article aims at evaluatingpossible pathways implementing synergies between climate policies and development policies in order to create an incentive towards DCs to take part in climate mitigation. We focus on an illustrative example on India.When most reference scenarios postulate rapid energy decoupling of the GDP and rapid decarbonisation of DCs economies in the future, this article elaborates, with the IMACLIM-R model, a baseline taking into account weaknesses and current disequilibria of the Indian technico-economic system such as the high dependency on imported energy, or the structural shortage in electricity. We show why a purely climate centric approach (quota allocation), adopted to commit with a world objective of tabilization to 550ppm, induce very high transition costs in spite of significant financial transfers. On the contrary, a strategy based on the research of synergies between the reduction of these disequilibria, and the mitigation of GHG emissions is investigated in the power sector, which presents the biggest potential of no-regret measures. This permits to drop down transition costs applied to the Indianeconomy by improving the overall energy efficiency. An economic and environmental evaluation of this alternative scenario is lead.India, domestic policies and measures, climate policies, long term scenarios, international egotiations, power sector, climate regime, policies and measures, energy efficiency, realistic baselines, peak-oil
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
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
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