179,200 research outputs found
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
Living conditions and subjective well-being of farmers - An ordered response analysis of regional differences and changes over time
No full textThe liberalisation of trade with building down of tariffs and quotas, and with subsequently lower output prices, has enforced considerable structural changes in the agricultural sector. In Norway, both naturally given factors such as climate and topography, and social conditions such as a tradition for small family farms and strong governmental regulations, contribute in making this process even harder on the individual farmer. So how do the farmers respond? National farm statistics show that the amount of cultivated land stays approximately the same even though the number of farm units and agricultural employment falls annually. This implies that both farm size and productivity have increased. In this paper we utilise sample survey data on living conditions in agricultural households to examine whether we can observe changes in farmers ’experienced utility. Have contentment dropped and are there any obvious regional differences in contentment? The data consists of non-overlapping cross-sections for the years 1995 and 2002 and we make use of a standard ordered probability model in the estimations.
Produzione di nuovi leganti polimerici energetici per propellenti solidi
No full textNegli ultimi anni la ricerca nel settore della propulsione aerospaziale ha rivolto la propria attenzione allo sviluppo di nuovi materiali energetici, capaci di migliorare le prestazioni del propellente, in termini di impulso e velocità di combustione, senza ridurne la vulnerabilità e la processabilità. In questo contesto, fra le numerose possibilità di sviluppo attualmente considerate, i “leganti energetici” sono divenuti oggetto di progressivo interesse.
Il presente lavoro di ricerca è consistito in uno studio completo e approfondito di nuovi leganti polimerici energetici. Nella prima parte del lavoro, è stato necessario selezionare la via sintetica più vantaggiosa, considerando la sicurezza come il principale fattore discriminante tra le diverse strategie prese in esame. Tale impegno ha necessariamente implicato lo studio dettagliato della sintesi di pre-polimeri azidici su piccola scala, che ha condotto alla selezione del copolimero GA/BAMO 75/25 e del pAMMO come possibili sostituti dell’HTPB legante, e della strategia di polimerizzazione/azidazione come miglior compromesso tra efficacia e sicurezza della sintesi.
Successivamente sono state affrontate le principali problematiche connesse sia alla reazione di polimerizzazione che alla successiva azidazione, con particolare attenzione circa il controllo delle funzionalità terminali del polimero e delle specie oligomeriche formatesi durante la polimerizzazione, e della cinetica di azidazione.
Una volta ottimizzati tutti questi aspetti, abbiamo effettuato lo scale-up di entrambe le sintesi, in modo tale da avere materiale sufficiente per procedere ad una prima caratterizzazione applicativa di propellenti a base di leganti energetici.
Infine, sono state determinate le proprietà meccaniche, reologiche ed energetiche di un propellente a base di GA/BAMO come matrice legante
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
CPAP e BIPAP nel trattamento della sleep apnea syndrome: effetti short term
No full textIV Congresso Nazionale A.I.M.S., Taormina 26-28 sett. 1994:33
Liftings for noncomplete probability spaces
No full textThe current state of knowledge concerning liftings for noncomplete probability spaces is discussed. This is a somewhat expanded version of the author's talk given at the 1991 Summer Conference on General Topology and Applications in Honor of Mary Ellen Rudin and Her Work.PT: S; CR: BURKE MR, IN PRESS P AM MATH S BURKE MR, 1991, ISRAEL J MATH, V73, P33 BURKE MR, 1992, ISRAEL J MATH, V79, P289 CARLSON T, THEOREM LIFTING CHRISTENSEN JPR, 1974, TOPOLOGY BOREL STRUC FREMLIN DH, 1989, HDB BOOLEAN ALGEBRAS, P877 INOESCUTULCEA A, 1966, 5TH P BERK S MATH ST, V2 IONESCUTULCEA A, 1967, CONTRIBUTIONS PROB 1, P63 IONESCUTULCEA A, 1969, TOPICS THEORY LIFTIN JECH TJ, 1978, SET THEORY JOHNSON RA, 1980, P AM MATH SOC, V80, P234 JUST W, IN PRESS T AM MATH S KUPKA J, 1983, INDIANA U MATH J, V32, P717 LOSERT V, 1983, LNM, V1080, P95 MAHARAM D, 1958, P AM MATH SOC, V9, P987 SHELAH S, 1983, ISRAEL J MATH, V45, P90 TALAGRAND M, 1982, P AM MATH SOC, V84, P379 VONNEUMANN J, 1931, CRELLES J MATH, V165, P109; NR: 18; TC: 0; J9: ANN N Y ACAD SCI; PG: 4; GA: BZ86BSource type: Electronic(1
INFLUENCE OF DIFFERENT SETT TREATMENT TECHNIQUES ON YIELD, QUALITY AND ECONOMICS OF THE SUGARCANE
No full textThe field experiment was carried out, during 2017-18, 2018-19 and 2019-20 to evaluate the influence of different sett treatment techniques on yield, quality and economics of the sugarcane at R and D farm, Vasantdada Sugar Institute, Manjari, Pune. The treatments comprises agro chemicals viz. carbendazim 0.01%, Imidacloprid 0.003%, bio inoculant includes consortia of nitrogen fixing bacteria, as well as bio stimulants viz. Ethrel 50 ppm, oligochitosan 100 ppm were applied manually and by vacuum pressure technique (200 mm Hg for 20 min.) and sett treated with Moist Hot Air at 54°C for 150 min. Single buds setts of var. VSI 08005 were used for imposing treatments and planted in protrays. The experiment was laid out in completely randomized block design with three replications. Based on results of the experiment significantly higher cane yield (171.17 t/ha), sett yield (8.66 lakh/ha two budded setts) and Benefit:Cost ratio (1:2.77 by cane yield and 1:6.44 by sett yield) was obtained in sett treated with Moist Hot Air at 54°C for 150 min. Sett treated with Ethrel (50 ppm) manually and by vacuum pressure technique showed superior germination
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