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Learning 2.0: collaborative technologies reshaping learning pathways 35 practical utilization of what they are learning, while also serving as support for various types of projects and assignments. But this type of increased interaction and versatility that emerging technologies are praised for bringing into the field of distance education are also the reason why Web 2.0’s advantages should be considered on a much larger scale. Around the world people engage in learning activities that are not necessarily structured or organized in any way, but appear as a natural flow of continuously modulated information, made available on the web by millions and millions of peers following their passions, interests, fears, uncertainties, etc. and tapping into the “wisdom of crowds” they end up enriching themselves. What we are basically referring to is the concept of informal learning, involving all that is learned throughout life in the day-to-day processes at home, work and leisure; and since Web 2.0 applications have slowly found their place into all of these settings it seems only obvious to reflect upon their role in informal learning activities, of whose importance is largely underestimated, but who contribute to our pool of reliable facts and experiences much more than we even imagine. The acceptance of informal learning acknowledges that there is more to learning than the absorption of “explicit” knowledge codified in texts and delivered during formal courses. It also, crucially, consists of access to “tacit” or implicit knowledge, which is exactly what all sorts of social media have best to offer. Therefore, when considering the main benefits of user-generated-content fuelling the brought up “wisdom of crowds” phenomenon, one of the most obvious one would be the fact that users have a lot of tools at their disposal to join the global conversation and actively engage in the construction of their (learning) experience, rather than merely absorb content passively. And this content will be constantly refreshed by the users, it will not require expensive expert input, something which accentuates both its purely authentic character and its reliability, the democratic nature of the web making sure that every piece of information, data or statement out there can be reinforced or refuted by users with similar experiences/authorized opinions and various ways of expression at their disposal. All in all, through the broad variety of versatile tools, social media or Web 2.0 in general allows the implementation of more effective learning strategies that can furthermore improve individual performance, actively foster the development of transversal competences, and nurture abilities to flexibly develop skills in a lifelong learning continuum. This is easily attainable because the Learning 2.0 spectrum offers accessible, flexible and dynamic learning environments that can complement and supplement initial training. Furthermore, the networking potential of social media, together with its power to overcome time and space barriers, supports interaction and collaboration among and between learners and teachers who are geographically dispersed and enables students to broaden their horizons, and collaborate across borders, language barriers, and institutional walls. Hence, team-work abilities are highly developed by collaborative work environments supported by most of the Web 2.0 tools like shared community spaces and inter-group communication platforms, which are also a massive part of what excites young people and therefore should contribute to users’ persistence and motivation to learn. Last but not least, research results indicate that social media approaches to learning can mitigate existing inequalities and can be employed to successfully re-engage individuals who are at risk of exclusion from the knowledge society. Learning 2.0 strategies can thus effectively increase the accessibility and availability of learning opportunities for the hard to reach, and can significantly improve motivation and engagement in learning. 36 Management and Services 4.2 Challenges and bottlenecks While the potential of social media for enhancing learning opportunities is substantial, there are nevertheless a few obstacles to the smooth implementation of Learning 2.0 strategies. The first one we need to mention is the very basic premise for collaborative technologies becoming a part of any process: Internet access. Although the number of people going online has increased tremendously during the past few years, the Internet is still not a commodity everywhere, in some parts of the world being actually very far from that. So then we ask ourselves how can we talk about the blessings of Learning 2.0 in a democratic way when access to such practices is prohibited sometimes due to disparities in economic and technical development. Apart from the still non-unanimous use of Internet nowadays that will hopefully soon be overcome, we can identify further technical, organizational and pedagogical bottlenecks that hinder the fast spread and efficacy of Learning 2.0 practices. More than the lack of proper facilities allowing access to internet communication technologies in all educational institutions, access to basic digital skills constitute a major obstacle for the use of social media in education activities, and a key problem for inclusion and equality. In this sense both learners and teachers face a challenge – teachers in particular as they do not feel confident enough with their information and communication technology skills to experiment with Learning 2.0 strategies and further on they also need assistance sometimes, when their students don’t have advanced digital competences, in supplying them with the necessary digital skills to safely use social media environments. Especially in this case, the mainstream deployment of Learning 2.0 approaches and strategies might be hindered by a lack of didactic methodologies, toolsets and training programmes for teachers which would also enable them to assume their new role as guides and mentors. Another very important aspect when considering social media in educational institutions is the safety and privacy concern. Learning 2.0 strategies require the confident and critical use of these tools and an informed and critical attitude towards interactive media and digital information (Hulme, 2009). Constantly bearing this in mind is an extra responsibility that needs to be assumed by educators, who have to make sure that the identities of their learners are protected; that rules of conduct are implemented and adhered to; and that intellectual property rights are respected. Learning 2.0 brings requirements also on institutional change, as with their rooting in formal education processes comes also a re-evaluation of educational institutions’ role in society as knowledge providers. This challenges rigid existing power structures, as resistance to change limits the development of new concrete ways to support teachers, learner and administrators and generally encumber these institutions when it comes to taking an active role in deploying promising Learning 2.0 strategies. And in order to offer a very objective depiction of this situation, it is sadly accentuated by the tumultuous character of social media landscape, which underlies continuous change and transformation and hence a lot of uncertainty concerning the future development and availability of current applications and services, the reliability of user-produced content, suitable assessment and certification strategies; and valid pedagogical concepts and methods for learning with social media. Strongly related to this aspect appears the fact that, although it is easy to see the Web 2.0 environment as an extension or development of pre-existing tools and approaches for learning, there are however some critics of these tools and user-generated content in general Learning 2.0: collaborative technologies reshaping learning pathways 37 that refer to a break-down in the traditional place of expertise, authority and scholarly input. They express concerns about trust, reliability and believability in relation to the move away from the printed word to the more ephemeral digital word. Furthermore, if content is created by users on different systems like podcasts, blogs, wikis, chat systems, and other social networking software, then it can be difficult to keep track of where everything is, and to access it with ease, both for those that use that content in formally structured learning frameworks and the casual visitor in search for informal learning fruits. This in turn calls for new tools to help users search and integrate across content that may be quite fragmented, a concern which is slowly but surely addressed through the proliferation of other innovative tools such as tagging, folksonomies and others. Last but not least, we must not forget that the great uses of Web 2.0 tools for learning are not guaranteed without the users’ interest in such technologies and what they have to offer. And although there is a general consensus that at least the new generation of learners are all about collaborative technologies and social media, their attention and dedication to these tools might not always be constant. This can have serious consequences on the success of Web 2.0 applications, which is strongly dependent upon the users being regularly connected and contributing to the shared content on these platforms. Thus, there is a real need to understand the dynamics of the attention-grabbing effect of Web 2.0 and harness it for education purposes. 5. Conclusion There is no doubt that new information and communication technologies become a more and more important part of our lives as we speak, reaching up to every layer of our existence. With the continuous globalization of information, learning independent from time, place, cost and other needs begins to make use of innovative Web 2.0 technologies, spreading an air of freshness and imminent transformations among old systems and learning patterns and determining a reassessment of their constitutive structures in order to better accommodate envisioned advantages of the new media. This chapter focused on the influence of such tools in the educational field as an emerging worldwide trend, endeavouring an objective depiction of pros and cons when considering the integration of social media within current conservative teaching and learning patterns. Departing from a historical approach upon the development of the internet into the socalled Web 2.0 social networking environment it has become nowadays, we are relating these innovative tools to educational practices and styles, trying to understand the emerging phenomenon of Learning 2.0 with the opportunities and challenges it brings for learner and education systems and structures worldwide. Social media applications provide easy, fast and efficient ways to access a great diversity of information and situated knowledge. To quote Tiwana (2002), “knowledge is one of the few resources that demonstrates increasing returns to scale: the more you share it, the more it grows”. Then it is only logical, if knowledge dissemination lays at the core of its thriving, that we should do everything standing in our power to stimulate and support the transfer of knowledge among as many individuals as possible even from our instruction years, offering ourselves the perfect tool for effectively building competences in collaboration with other learners, practitioners and stakeholders in a lifelong continuum. The technological development has brought us as far as being constant parts of an online, digital, parallel 38 Management and Services universe, with new, improved and easy to use applications, making the Internet maybe the most democratic space of all and the entire mankind a co-generating part of it. So why not use this “universe” to stimulate and support core learning processes, why not tap into all the advantages and opportunities Web 2.0 tools bring in the education field, why not let them facilitate for all of us the development of key competences for the 21st century? Learning 2.0 encompasses after all the modern tools needed for appealing to a whole new generation of learners – the “digital natives” who absorb information quickly, in images and video as well as text, from multiple sources simultaneously, they operate at very fast speed, expecting instant responses and feedback, they prefer random "on-demand" access to media, expect to be in constant communication with their friends (who may be next door or around the world), and they are as likely to create their own media (or download someone else's) as to purchase a book or a CD (Tapscott, 2009). Using Web 2.0 applications in educational processes involving this new generation of learners is speaking their own language when preparing them for life and therefore becoming more efficient at it. As we have shown throughout this chapter, Learning 2.0 represents also the development of e-learning applications, which begin to look much more like a blogging tool (viwed as a node in a web of content, connected to other nodes and content creation services used by other students) , a personal learning center (where content is reused and remixed according to the student's own needs and interests) or like a personal portfolio tool. The idea here is that students will have their own personal place to create and showcase their own work. The portfolio can provide an opportunity to demonstrate one's ability to collect, organize, interpret and reflect on documents and sources of information. It is also a tool for continuing professional development, encouraging individuals to take responsibility for and demonstrate the results of their own learning. All of these new tools and opportunities for learning and developing young people have today constitute much more than a system of education – they shape an entire environment for flourishing learning. We say this because, in comparison to the very rigid demarcations of the classical education system before the smooth adoption of Web 2.0 tools, this new environment recognizes that the learning comes not from the design of learning content but from how it is used. Slowly and surely more and more people among which learners, trainers, pedagogs and members of the academia begin to acknowledge these facts and dedicate research resources towards the better understanding of these intrinsic transformations in the education field, of their premises, consequences and influencing factors in order to harness the potential of Learning 2.0. In this sense, a great amount of work is being done, for example, in educational gaming and simulations. Although a rather new practice, several universities around the world have already a few years experience with such Web 2.0 enabled educational simulation programs, convinced by their promise to foster interaction and team-work abilities, increase active participation, assuming responsibility and gaining experience in a profesional simulated environment, as well as the opportunity to develop distance education and inter-institutional projects. Being actively involved in the development and derulation of a business simulation research project with participants from several Romanian universities, a personal appreciation of these type of programs would go directly to saying that the most important learning skills one sees children getting from such games and simulations are those that support the empowering sense of taking charge of their own learning. And the learner taking charge of learning is antithetical to the dominant ideology of a curriculum design, which is more than enough to understand why these developments are tremendously important in the field of education and why more and more Learning 2.0: collaborative technologies reshaping learning pathways 39 efforts should be dedicated towards a more recurrent and efficient implementation of innovative tools of all kinds in various edicational contexts. One of such contexts would be also the realm of mobile learning, a rapidly rising domain, that offers not only new opportunities to create but also to connect, by defining new relationships and behaviours among learners, information, personal computing devices and the world at large (Wagner, 2005). To sum up, the already undertaken research points out that there is not only a great potential of innovation at a technical, organizational and pedagogical level brought in by Learning 2.0 strategies, but that there are also several obstacles rising up in front of the social media efficacy in education institutions. There are indeed great arguments in favour of their adoption, like the fact that they allow learners to access a vast variety of (often freely available) learning content, which supports incessant learning and professional development even in informal settings, it enables distance education accentuating the interaction and motivation for learning, it contributes to equity and inclusion and puts pressure on education institutions to improve the quality and availability of their learning material. Moreover, since social media allow users to create digital content themselves and publish it online, it gives rise to a huge resource of user-generated content from which learners and teachers can mutually benefit, also encouraging more active and pro-active approaches to learning. Last but not least, it connects learners with one another, experts and teachers alike, allowing them to tap into the tacit knowledge of their peers and have access to highly specific and targeted knowledge in a given field of interest, at the same time supporting also the collaboration between them on a given project or a joint topic of interest, pooling resources, creating synergies and gathering the expertise and potential of a group of people committed to a common objective. Although all these are great advantages picturing a bright future of the education system under the upcoming years of technical modernity we must not be naive and think that all these things can happen without a strong technological basis in form of access to proper facilities and advanced IT and social media instruction and assistance for learners and teachers; at the same, none of this is possible in the absence of institutional innovation and a fresh mindset that embraces the integration of social media with conservative learning techniques. Therefore we highly encourage the full acknowledgement of these impediments and further research into covering the gap of misperceptions and uncertainties regarding Learning 2.0 strategies and being concretely able to transform all of their opportunities and advantages into strong-stating facts. 6. References Alexander, B. (2006). Web 2.0: a new wave of innovation for teaching and learning?. Educause Review. Vol. 41, No. 2, 32-44, ISSN 1479-4403 Augar, N. et all (2004). Teaching and Learning Online with Wikis. Accessed 28/12/2009 http://ascilite.org.au/conferences/perth04/procs/augar.html Ballantyne, N.; Quinn, K. (2006). Informal Learning and the Social Web. Accessed 12/12/2009 http://informallearning.pbwiki.com Becta (2007). Emerging Technologies for Learning, Volume 2. British Educational Communications and Technology Agency. ISBN 1-853-79-467-8 Coventry, UK. Accesses 30/02/2010 http://www.becta.org.uk/research/emerging_technologies07.pdf 40 Management and Services Bruns, A. (2008). Blogs, Wikipedia, Second Life and Beyond. From Production to Produsage, Peter Lang Publishing, ISBN 978-0-8204-8867-7, New York Chang, C.K. et all (2008). Constructing a community of practice to improve coursework activity. Computers & Education. Vol. 50, No. 1, 235-247, ISSN 0360-1315 Cramer, K.M. et all (2007). The virtual lecture hall: utilisation, effectiveness and student perceptions. British Journal of Educational Technology. Vol. 38, No.1, 106-115, ISSN 0007-1013 Ellison, N.; Wu, Y. (2008). Blogging in the Classroom: A Preliminary Exploration of Student Attitudes and Impact on Comprehension. Journal of Educational Multimedia and Hypermedia. Vol. 17, 99-122, ISSN 1055-8896 Hulme, M. (2009). Life Support: Young people’s needs in a digital age. Youth Net report. Accessed 18/10/2009 http://www.youthnet.org/mediaandcampaigns/ pressreleases/hybrid-lives Konieczny, P. (2007). Wikis and Wikipedia as a Teaching Tool. International Journal of Instructional Technology and Distance Learning. Vol. 4, No. 1, 15-34, ISSN 1550-6908 Lee, M.J.W. et all (2008). Talk the talk: Learner-generated podcasts as catalysts for knowledge creation. British Journal of Educational Technology. Vol. 39, No. 3, 501-521, ISSN 0007-1013 Mason, R.; Rennie, F. (2007). Using Web 2.0 for learning in the community. Internet and Higher Education, Vol. 10, 196-203, ISSN 0360-1315 Mason, Robert M. and Tabitha Hart. (2007). Libraries for Global Networked World: Toward New Educational and Design Strategies. Paper presented at the World Library and Information Congress, 19-23 August. Durban, South Africa. Accessed 5/03/2010 http:// archive.ifla.org/IV/ifla73/papers/158-Mason_Hart-en.pdf O’Reilly, T. (2005). What is Web 2.0? Design Patterns and Business Models for the Next Generation of Software. Accessed 01/06/2009 http://www.oreillynet.com/ pub/a/oreilly/tim/news/2005/09/30/what-is-web-20.html Pascu, C. (2008). An Empirical Analysis of the Creation, Use and Adoption of Social Computing Applications. IPTS Exploratory research on Social Computing, JRC Scientific and Technical Reports. Accessed 22/05/2010 http://ftp.jrc.es/EURdoc/JRC46431.pdf Redecker, C. et all (2009). Learning 2.0: The Impact of Web 2.0 Innovations on Education and Training in Europe. Final Report. JRC Scientific and Technical Reports. Accessed 19/04/2010 http://ipts.jrc.ec.europa.eu/publications/pub.cfm?id=2899 Rennie, F.; Mason, R. (2004). The Connection: Learning for the Connected Generation. Information Age Publishing, ISBN 1-59311-210-6, Greenwich, Connecticut Tapscott, D. (2009). Grown Up Digital. How the net generation is changing your world, McGrawHill, ISBN 978-0-07-150863-6, New York Tiwana, A. (2002). The Knowledge Management Toolkit. Orchestrating IT, Strategy and Knowledge Platforms, 2nd Edition, Prentice Hall PTR, ISBN 978-0-1300-9224-3, Upper Saddle River, NJ Usluel, Y. K. ; Mazman, S.G. (2009). Adoption of Web 2.0 tools in distance education. Procedia Social and Behavioural Sciences, Vol. 1, 818-823, ISSN 0747-5632 Wagner, E.D. (2005). Enabling Mobile Learning. Educause Review. Vol. 40, No. 3, 40-53, ISSN 1303-6521 Nonfunctional requirements validation using nash equilibria 41 X3 Nonfunctional requirements validation using nash equilibria Vicky Papadopoulou and Andreas Gregoriades European University Cyprus Cyprus 1. Introduction The Network security aims to protect the network and the network-accessible resources from unauthorized access. However, the dynamic characteristics of contemporary networks combined with their increased size makes the vision of absolute network security almost impossible. Specifically, networks are vulnerable to infection by different types of electronic attacks such as viruses, Trojan horses or eavesdroppers that exploits the loopholes in the security mechanisms of networks [FAGY00]. Guaranteeing an acceptable level of security for a prospective system represents a common problem in systems engineering. Network security, is defined as a Non-Functional Requirement (NFR) that is influenced by functional aspects of the system such as the specification of antivirus and firewall mechanism employed on the network. This area of research has gained considerable popularity due to the implications it has on users’ satisfaction, business reputation and performance. Therefore, being able to quantify the security level of a future network early in the design phase is of vital importance to its sustainability. The need to validate security requirements early has been addressed also by Lamsweerde [CILN02] and Crook [L04]. Unlike functional requirements, which can be deterministically validated, NFRs are soft variables that cannot be implemented directly; instead, they are satisfied by a combination of functional requirements. NFRs define the overall qualities or attributes of the resulting system and as such place restrictions on the software product being developed. Examples of NFR include safety, security, usability, reliability and performance requirements. Typical approaches to validating NFRs include, formal methods, prototypes, system simulations [AG05] and use of scenarios. Model-checking techniques have been used extensively to verify and validate requirements. However, when its comes to NFR model checking is not adequate. Scenario-based requirements analysis methods, pioneered by Potts [P99] , Potts and Anton [P98], and Potts et al [P94], proposed that obstacles or difficulties which might prevent a goal being achieved should challenge requirements and, hence, promote refinement of the requirements specification to deal with such obstacles. This approach was developed by van Lamsweerde [L01] and van Lamsweerde and Letier [L00] , who applied formal reasoning to requirements