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Institution

Open University of Catalonia

EducationBarcelona, Spain
About: Open University of Catalonia is a education organization based out in Barcelona, Spain. It is known for research contribution in the topics: Collaborative learning & Educational technology. The organization has 1943 authors who have published 4646 publications receiving 64200 citations. The organization is also known as: Universitat Oberta de Catalunya & UOC.


Papers
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Journal ArticleDOI
TL;DR: This paper quantitatively evaluates CIPT and shows that significant savings can be achieved, both in relative and absolute terms.
Abstract: A majority of Internet service providers (ISPs) support connectivity to the entire Internet by transiting their traffic via other providers. Although the transit prices per megabit per second (Mbps) decline steadily, the overall transit costs of these ISPs remain high or even increase due to the traffic growth. The discontent of the ISPs with the high transit costs has yielded notable innovations such as peering, content distribution networks, multicast, and peer-to-peer localization. While the above solutions tackle the problem by reducing the transit traffic, this paper explores a novel approach that reduces the transit costs without altering the traffic. In the proposed Cooperative IP Transit (CIPT), multiple ISPs cooperate to jointly purchase Internet Protocol (IP) transit in bulk. The aggregate transit costs decrease due to the economies-of-scale effect of typical subadditive pricing as well as burstable billing: Not all ISPs transit their peak traffic during the same period. To distribute the aggregate savings among the CIPT partners, we propose Shapley-value sharing of the CIPT transit costs. Using public data about IP traffic and transit prices, we quantitatively evaluate CIPT and show that significant savings can be achieved, both in relative and absolute terms. We also discuss the organizational embodiment, relationship with transit providers, traffic confidentiality, and other aspects of CIPT.

26 citations

Journal ArticleDOI
TL;DR: In this article, the application of a project-based task in virtual groups has led to a greater significant knowledge to participants, and the results of their analysis show significant improvement in all three types of knowledge.

26 citations

Journal ArticleDOI
TL;DR: In this article, the authors argue in favour of a research program for the exploration of experimental collaborations, a methodological approach whose epistemic engagement with the empirical work is ex ective.
Abstract: This position article argues in favour of a research programme for the exploration of experimental collaborations, a methodological approach whose epistemic engagement with the empirical work is ex...

26 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented a questionnaire to measure co-innovative sources of productivity in tourism small and medium enterprises (SMEs), which has been validated by exploratory factor analysis.
Abstract: With the aim of providing new evidence and a practical instrument to measure co-innovative sources of productivity in tourism small and medium enterprises (SMEs), this article presents a newly designed questionnaire that has been validated by exploratory factor analysis. The empirical study was conducted on a representative sample of 500 tourism SMEs in Catalonia (a region in north-eastern Spain). Three factors emerged from the analysis: (1) Internet use; (2) firm innovation; and (3) new forms of work organization. Together, these factors explained 45.4% of cumulative variance. The reliability coefficients obtained for the three factors were high (α1 = 0.76; α2 = 0.72; and α3 = 0.71). The study also identified a specific form of co-innovation in SMEs, which is based on bringing radically innovative products and services to the market, and on Internet use and work organization practices that are clearly orientated towards increasing income and optimizing resources. The combination between economics of the ...

25 citations

Journal ArticleDOI
TL;DR: The results obtained indicate that, when collaborative writing includes peer feedback, instead of unidirectional corrections from the teacher, the students respond more reflectively and constructively, they discuss the content they are working with, and, as a result, they make significant changes in their own writing.
Abstract: This exploratory study aims to analyse the nature of peer feedback during a collaborative writing assignment, and to identify the possible effects of feedback on the revision of a text written by university students in a blended learning environment. Under analysis are two different graduate courses in academic writing, during which, over a period of a semester, the students (n = 85) were divided into 25 work groups to carry out a co-evaluation assignment with the support of a technology platform. The results obtained indicate that, when collaborative writing includes peer feedback, instead of unidirectional corrections from the teacher, the students respond more reflectively and constructively, they discuss the content they are working with, and, as a result, they make significant changes in their own writing.

25 citations


Authors

Showing all 2008 results

NameH-indexPapersCitations
Andrea Saltelli6518431540
Jose A. Rodriguez6359717218
Cristina Botella5540413075
Fatos Xhafa5269210379
Jaime Kulisevsky4821015066
William H. Dutton432777048
Angel A. Juan412845040
Aditya Khosla396150417
Jordi Cabot381065022
Jordi Cortadella382265736
Antoni Valero-Cabré37996091
Berta Pascual-Sedano34874377
Josep Lladós332714243
Carlo Gelmetti331593912
Juan V. Luciano331062931
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202328
202286
2021503
2020505
2019401
2018343