1,720,987 research outputs found
I lipidi nell'alimentazione dei pesci teleostei
No full textI lipidi sono una categoria di composti fondamentali nell'alimentazione dei pesci teleostei. Vengono esaminate le principali caratteristiche chimico-fisiche degli acidi grassie la composizione acidica media dialcune fonti lipidiche impiegagate o impiegabili nella mangimistica per acquacoltura. Infine viene fatta una rassegna sugli effetti di fonti lipidiche non convenzionali sulle prestazioni produttive e le caratteristiche orgamolettiche di Salmonidi e di pesci di acqua calda
Forecasting of electrical vehicle impact on infrastructure: Markov chains model of charging stations occupation
Full text linkCharging infrastructures are under the attention of researchers and companies as they are actually the crucial point for the development of the spread of electric vehicles. For this reason It is essential to have forecasting tools that analyze the behaviour of users to try to extrapolate data and useful information. In this work we start from a group of data collected during the Teinvein project and then reworked to obtain a forecasting model based on Markov chains. The method proposed in the paper makes use of information related to the distribution of vehicles in the charging stations, their average plug time, the amount of energy withdrawn, to reconstruct a distribution of occupancy model of a single station and, consequently, the consumption profile
Interobserved variation in interpreting cervical mucus as an indicator of the fertile phase of a cycle
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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
Electrified methane reforming decarbonises methanol synthesis
No full textPower-to-X processes convert free electrons stemming from renewable energy into chemical bonds. In this framework, electrochemical processes drastically increase energy demand. Differently, directly electrified thermochemical processes, such as electrically heated methane reforming, minimise renewable energy requirements and achieve high decarbonisation levels. In the case of electrically heated methane reforming carbon dioxide emission from the stuck of the firebox is avoided. In this work, we report two innovative process configurations for methanol production that involve an electrically heated methane reformer for syngas generation. Reforming of methane and carbon dioxide containing gas streams into syngas coupled with methanol synthesis can achieve negative carbon dioxide balance without requiring carbon capture and sequestration. Increasing the amount of reformed carbon dioxide, it is possible to increase its consumption. Integration of an electrolyser is required when syngas with a hydrogen/carbon monoxide below 2 is generated. It results that the integration of an electrically heated reformer in a methanol plant makes it possible to convert respectively 0.3 t and 0.93 t of carbon dioxide per ton of methanol produced. The consumption of renewable electricity is 2.3 MWh and 7.1 MWh per ton of methanol produced
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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