1,721,040 research outputs found
Proposal to measure the rare decay K+ ---> pi+ nu anti-nu at the CERN SPS
No full textPROPOSAL CERN-SPSC-2005-013, CERN-SPSC-P-326, Jun 2005
Proposal to measure the rare decay K+ -> pi^+ nu nu-bar at the CERN SPS
No full textCERN-SPSC-2005-013 publicatio
The effects of anticalmodulin drugs on the ultrastructure of boar spermatozoa
No full textTrifluoperazine, N-6-aminohexyl-5-chloro-1-naphthalene sulfonamide (W7), and calmidazolium are known to be calmodulin inhibitors and cell membrane soluble substances. In mammalian spermatozoa, calmodulin is present and is retained to mediate several sperm processes, such as sperm activation, sperm-egg fusion, microtubule disassembly, etc. We examined the effects of anticalmodulin drugs on the ultrastructure of freshly ejaculated boar spermatozoa. Whereas all the drugs, at the low concentrations tested, appear to prevent acrosomal alterations, at higher concentrations, they induced these alterations. Unexpectedly, the outer acrosomal membrane appeared to be more sensitive to the drugs than the plasma membrane; vesicles formed within the acrosome from the outer acrosomal membrane even when plasma membrane maintained its structural integrity. These findings were confirmed by the analysis carried out by fluorescent light microscopy by utilizing fluoresceinated Ricinus communis agglutinins to specifically stain the acrosomes
Proposal to measure the rare decay K+- -> pi+ nu anti-nu at the CERN SPS
No full textWe propose to measure the very rare kaon decay K + → π + ν ν at the CERN SPS to make a decisive test of the Standard Model by extracting a 10% measurement of the CKM parameter |Vtd |
Malattie cardiovascolari ed estrogeni in menopausa
No full textEffetti preventivi della terapia estrogenica sostitutiva in menopaus
L'agroalimentare nello scenario socioeconomico attuale
No full textNel settore agro-alimentare gli ultimi anni hanno significato molto in termini di riequilibrio dei ruoli e delle posizioni. In particolare, la forte competizione del mercato ha fatto segnare la cancellazione di numerose imprese di minori dimensioni, la rilevante perdita di potere contrattuale da parte del settore agricolo e l’evidente diminuzione occupazionale imputabile a soluzioni tecnologiche ed organizzative sostitutive. Parlare di agro-alimentare oggigiorno vuol dire trattare di un microcosmo particolarmente complesso. Discutere di agricoltura, alimenti e consumi delle economie cosiddette “evolute” (dove le molteplici forme degli usi sempre più spesso travalicano la necessità per farsi edonismo) impone una premessa relativa agli ultimi tempi, particolarmente intensi per fatti e circostanze.
Nel nostro Paese, tradizionalmente descritto quale esportatore di consuetudini culturali e produttive di assoluta rilevanza, si è assistito ad una sostanziale ascesa della ricerca e della innovazione, proprio in quel settore primario, l’agricoltura appunto, che è base fondante dell’alimentare tutto. Parallelamente, le biotecnologie innovative e l’idea di rendere le piante sempre più rispondenti alle mutate esigenze di consumo caratterizzano il dibattito etico e produttivo odierno. Le dinamiche socio-economiche hanno accompagnato un tale cambiamento: meno addetti alle campagne, produttività cresciute esponenzialmente, nuovi obiettivi fatti di qualità e selezione delle superfici. Ed in città consumatori sempre più attenti ai cibi ed alle bevande, divisi tra cultori del rapporto qualità/prezzo, idealisti del gusto e distratti fruitori di circostanza. Cittadini inclini a riscoprire nel fine settimana il benessere agreste, disposti a spendere per trovare scampoli di tipicità agro-alimentare ed eno-gastronomica. Forte interesse, perciò, per le produzioni certificate a DOP ed IGP e per i vini a DOC e DOCG: un mix di oltre quattromila esemplari
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
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