1,721,323 research outputs found
A virtual counselor for online social networks (or did I really want to send you my post?)
No full textIt is well established by the scientific literature that a great part of Face-to-Face communication occurs at a non verbal level and also that this is partly obfuscated when the interaction takes place by Computer-Mediated-Communication (CMC). Fully aware we are simplifying the subject, we can say that the communication satisfies the need of humans to share their emotional experiences. Thus we can say that also the formulation and interpretation of messages exchanged in CMC is influenced by the emotions. Moreover the reduced physical presence in CMC implies a lack of social norms or social control which is amplified in the Online Social Networks (OSN) scenario. Motivated by these naïve considerations and the massive use of OSN, we introduce a Virtual Counselor as a contribution, from a technical point of view, to augment the quality of communication among users of OSN. The implementation of this Virtual Counselor is based on technologies by now mature like wearable devices to measure physical parameters, on artificial emotional intelligence, and on interactive tutoring systems, strongly used in online learning environments. We propose an abstract model of the communication scenario in OSN containing the Virtual Counselor to help the interpretation of the messages and of the emotional states in order to improve the communication among parties. The goal is to align the emotional states of senders and receivers to form dynamic groups of target friends in the OSN to send the posts to. The dynamism of the groups is both spatial (that is the composition of receivers can change for a given sender and a given message) and temporal (for example the sending of a message can be postponed in time). We think that this model is the basis for defining a new class of tools to improve the communication in OSN
Dasycladalean green algae from the Upper Triassic of Mt. Rotonda (Verbicaro Unit, Calabria-Lucania Border, Southern Italy)
No full textA rich and diverse dasycladalean algae association is described from the Upper Triassic succession of Mt. Rotonda (Calabria-Lucania border, Southern Italy). This association consists of: Neoteutloporella rajkae n.sp., Griphoporella bechstadti n.sp., Physoporella zamparelliae n.sp., Spinaporella andalusica Flugel and Flugel-Kahler, 1984, S. ? granadaensis Flugel and Flugel-Kahler, 1984, Chinianella? sp., Gyroporella sp., Griphoporella ? sp. and Physoporella aff. leptotheca. Neoteutloporella rajkae n.sp. is characterised by an undulated calcareous skeleton with short acrophore primary laterals bearing a tuft of 4-6 elongate, segmented, trichophore secondary laterals. This species allows to extend back to the Upper Triassic the stratigraphic range of the genus Neoteutloporella, previously known only from Upper Jurassic levels. Griphoporella bechstadti n.sp. has a cylindrical calcareous skeleton and primary laterals only, consisting of a thin proximal part followed by a swollen portion that pinches out distally and finally opens outward with a cup-like swelling. Physoporella zamparelliae n.sp. is characterised by a calcareous skeleton made by partly welded thin individual sheaths enclosing the laterals. The laterals are piriferous, vertically compressed, roughly triangular both in vertical and in verticillar section. In some specimens they end with a spine-like thin apophysis. This species confirms that the typical Middle Triassic genus Physoporella survived up into the Norian. The dasycladalean algal association of the Norian of Mt. Rotonda shows some similarities with the algal association found in the Upper Triassic of the Betic Cordillera whereas it is markedly different from the rich association occurring in the Upper Triassic of Sicily and of the Northern Calcareous Alps. This pattern is coupled with a different composition of the platform margin communities: microbial/serpulids bioconstructions in the Upper Triassic of the Calabria-Lucania border and of Alpujarride vs. Dachstein-type reefs in Sicily and the Northern Calcareous Alps. This indicates that the palaeoceanographic and palaeogeographic conditions controlled both the development of the different platform margin and of the different algal assemblages
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
An emotion-driven virtual counselling system in computer-mediated communication
No full textWe present and evaluate a virtual counselling system that is devoted to improving user awareness of emotional situations in computer-mediated communication and making informed decisions on actions to recommend to the users involved in a conversation. Starting from elements such as the moods and emotions of the users involved in a conversation, the system constructs the emotional signatures of individuals and groups that are used to characterize a situation. It then uses an approximate reasoning mechanism based on three-way decisions to classify recognized situations with respect to particular emotional dynamics based on emotional contagion. A prototype of the system has been experimented on in a real context based on collaboration between university students for the realization of project work. The distinctive features of the system have been evaluated with accuracy measures, and the results are promising
Insights on the paleoecology of Ammonia (Foraminifera, Rotalioidea) from Miocene carbonates of central and southern Apennines (Italy)
No full textThe Miocene transgression in central and southern Apennines is commonly represented by a sharp contact between shallow-water open-marine bioclastic limestones and the underlying Cretaceous or Eocene bedrock. Only in a few areas, very proximal marine or paralic deposits, witnessing the first stage of the transgression, have been preserved. These deposits contain rich foraminiferal assemblages commonly dominated by specimens of the genus Ammonia. The paleontological and paleoenvironmental analysis revealed that the Miocene Ammonia shared the same habitat and ecological requirements of living representatives from recent shoreline environments. Small Ammonia forma ‘tepida’ have been found in Miocene marginal paralic organic-rich bottoms with restricted water circulation and possibly under natural metal pollution. Big Ammonia forma ‘beccarii’ characterize Miocene nearshore marine bottoms with vegetated areas under fresh water inputs. The endoskeletal lamellar folding called tooth-plate, which characterizes recent representatives, is observed in fossil specimens of both tepida and beccarii morphogroups, testifying that there were no major changes in the shell architecture of Ammonia since the early Miocene
Comment on "Sea-level control on facies architecture in the Cenomanian-Coniacian Apulian margin (Western Tethys): A record of glacio-eustatic fluctuations during the Cretaceous greenhouse?" by S. Galeotti, G. Rusciadelli, M. Sprovieri, L. Lanci, A. Gaudio and S. Pekar [Palaeogeography, Palaeoclimatology, Palaeoecology 276 (2009) 196-205]
No full textGaleotti et al. (2009; Galeotti S., Rusciadelli G., Sprovieri M., Lanci L., Gaudio A., Pekar S., A record of glacio-eustatic fluctuations during the Cretaceous greenhouse? Palaeogeogr. Palaeoclimatol. Palaeoecol. 276, 196-205) (hereafter Getal09) use the sequence stratigraphic record of a Cenomanian-Coniacian base-of-slope succession, exposed in the Morrone mountain of central Italy, to calibrate the sea-level history inferred from the adjacent Lazio-Abruzzi carbonate platform. The episodes of sea-level fall recorded by this carbonate platform and slope in the western Tethys are said to coincide with episodes of global cooling and sea-level fall recorded in the New Jersey margin (Miller, K.G., Sugarman, P.J., Browning, J.V., Kominz, M.A., Hernández, J.C., Olsson, R.K., Wright, J.D., Feigenson, M.D., Van Sickel, W., 2003. Late Cretaceous chronology of large rapid sea-level changes: glacioeustasy during the greenhouse world. Geology 31, 585-588). On the basis of this correlation, Getal09 claim that the Late Cretaceous sea-level history of the Lazio-Abruzzi carbonate platform was controlled by glacio-eustatic fluctuations.This conclusion conflicts with a wealth of published data supporting the view that the major unconformities in the Cretaceous carbonate platforms of central-southern Italy were controlled by regional tectonics.We will show how the sea-level history of the Lazio-Abruzzi carbonate platform proposed by Getal09, and its correlation with the base-of-slope section, hinge on a misrepresentation of the chronostratigraphic resolution attainable with biostratigraphy in shallow-water carbonate facies. We will also show how, contrary to what claimed by Getal09, the age-model for their base-of-slope section does not support the correlation with the New Jersey margin sequences. Finally, we will argue that, in Upper Cretaceous carbonate platforms, the integration of bio- and chemostratigraphy can greatly improve stratigraphic resolution and chronostratigraphic correlation. This is a prerequisite for using the shallow-water record to test the hypothesis of global glacio-eustatic fluctuations in the Cretaceous greenhouse. © 2010 Elsevier B.V
- …
