1,721,012 research outputs found
Pulsed high pressure treatment for the inactivation of Saccharomyces cerevisiae: The effect of process parameters
No full textThis paper aims to investigate the effect of main processing variables on the inactivation rates of Saccharomyces cerevisiaecells suspendedin commercial fruit juices and processed in pulsed high pressure treatments. The investigated variables were: pressure level, numberof pressurization cycles, pulse duration and ramp rate. According to our experimental results, the efficiency of pulsed high pressure
processes depends on the combination of pulse holding time and number of pulses. Pulsed high pressure is more effective than isostaticpressure, provided that the pulse holding time is higher than a threshold value. Moreover, no additive effect of the pulses could bedetected, being the lethality of the single pulses reduced when increasing the number of pulse and the ramp rate. These findings are confirmed
at different pressure levels with all processing media utilized. If several pressurization cycles with a defined number of pulses areapplied, the faster the compression rate the lower is the final inactivation level achieved
On the modelling of the inactivation kinetics of Saccharomyces Cerevisiae by means of combined temperature and high pressure treatments
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Smart Learning Communities for Bridging the Gender Gap in STEM
No full textThis paper presents the results achieved in four years of activity within the ‘NERD?’ project, created by IBM Italy and La Sapienza university of Rome, and carried on in collaboration with several universities and schools, in Italy. The long-term objective of the project is bridging the gender gap in the so-called STEM disciplines, (science, technology, engineering and mathematics) starting from the secondary education. Specifically, we make reference to the experience conducted in the field of informatics and computer engineering by the Federico II University of Naples, which empowered the original format of the ‘NERD?’ project, introducing a collaboration model within a smart learning community. This involved people from industry, university and secondary schools, including both teachers and students at all the levels
Smart learning in smart cities
No full textCommonly, the term smart learning is connected to the use of smart learning environments, with reference to the combination of software and hardware used for education and training by universities, schools, institutions and industries. In this field of application, in recent years, we have observed a never-ending succession of innovations in support of learning and instruction where instructional designers and developers run-after every new technology, to create innovative applications based on what they believe more effective, efficient, and engaging for both learners and teachers (Spector, 2014). Then, such software environments can be more or less smart, depending on the number and the quality of services offered and the capability of interacting with other systems. Another possible interpretation is to consider smart learning as learning in smart environments and, in this respect, Koper (2014) defines smart learning environments as physical places enriched with digital, context-aware and adaptive devices, which promote better and faster learning. For what concerns smart cities, we observe that they should be considered the most advanced implementations of smart environments, since they are plenty of physical devices and systems, used to provide citizens with highly effective services, to the aim of improving their quality of life. In fact, cities are smart when they fully exploit newly available smart technologies and smart solutions, which rely on most recent advancements in, e.g., big data, analytics, cloud architectures, artificial intelligence and cognitive computing. Moreover, recent modifications in both laws and policy, also driven by economics and market trends, are dramatically changing learning processes and environments in the universities so that students are regarded as customers and, consequently, the objective is enhancing their satisfaction, which can be achieved by improving the overall quality of services. Since the main task of schools and universities is education, we observe that their role in forming smart citizens, also contributing to enhance the individuals’ quality of life, is of paramount importance. In conclusion, smart learning environments and smart cities adopt the same set of technologies and pursue the same objective of empowering people, thus, a new powerful educational ecosystem has to be considered, where learning involves students and teachers, which are primarily citizens
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
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