1,721,279 research outputs found
State transitions in Chlamydomonas reinhardtii. The role of the Mehler reaction in state 2-to-state 1 transition
No full textThe light intensity-dependent transition to state 1 of dark-adapted anaerobic state 2 Chlamydomonas reinhardtii cells is stimulated by oxygen and by other electron acceptors for photosystem I, such as oxaloacetate and methylviologen. This suggests that the transition to state 1 requires the oxidation of the intersystem chain by photosystem I photochemistry. On the other hand, the mere oxidation in the dark of the chain - by addition of O 2 - leads only to a slow and incomplete transition. The light-driven stimulation by O2 of the state 1 transition is saturated at an O 2 concentration of 15 to 20 μM, definitely higher than that of respiration. We suggest that this may represent the affinity for oxygen of the Mehler reaction, a conclusion that is confirmed by the observations that mitochondrial respiration is apparently not involved in modulating state 2-to-state 1 transition. The catalysis of the state 2-to-state 1 transition upon illumination of anaerobically adapted algae might represent, therefore, a relevant physiological role of this process in C. reinhardtii
I delitti di sfruttamento sessuale dei bambini, la pornografia virtuale e l'offesa dei beni giuridici
No full textIl saggio affronta le nuove problematiche emerse con la più recente legislazione penale in materia di incriminazione dei reati di pornografia minorile, che in attuazione delle convenzioni internazionali e delle fonti dell'Unione europea è stata estesa all'incriminazione anche di ipotesi concernenti la pornografia virtuale ed apparente. Tali riforme pongono il problema di quale sia il bene giuridico penalmente protetto, che non può più essere visto soltanto nella integrità dei singoli minori oggetto di sfruttamento a fini sessuali, ma più in generale nella protezione della loro dignità di persone anche nei confronti di comportamenti che diffondono modelli di sfruttamento e strumentalizzazione della loro sessualità da parte degli adulti, anche con scopi commerciali
In viaggio verso la giustizia, attraverso il mare greco. Introduzione
No full textHence, the reader of this work, thanks to the myth and to the literature, is invited to take part to a voyage into the «beloved islands (...) into the sea of seas». The reader will sail to the «archipelago where the great destiny of the Western civilization began». The Law expert reader, above all, (who is not the unique recipient) can notice the importance of these stories. By being at the helm of Law and by sailing into the sea of life, the Law expert can find in the Greek mindset justice ideas that are still effective in today’s worl
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
La disciplina per le madri, I soggetti affetti da aids o grave immunodeficienza, i tossicodipendenti/alcooldipendenti, il malato di mente/psichiatrico, gli stranieri
No full textD.lgs. 6 settembre 2011, n. 159 (Codice delle leggi antimafia e delle misure di prevenzione)
No full textVariations 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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