Abstract
Unified Communications (UC) have the potential to dramatically simplify and improve enterprise communications, reducing costs and improving revenue opportunities. However, these benefits do not come without risks. The introduction of an IP-based UC solution brings an array of new vulnerabilities into the enterprise, exploited by a growing number of malicious programs. This paper presents the most common of risks faced by the major dominant technologies used in unified communications solutions and an approach to mitigate them.

Abstract
In the last two decades, there has been a noticeable increase in published research on evolutionary economics. The general perception is that formalization lags behind appreciative work. Notwithstanding, this general reading has yet to be supported by real data analysis. This work presents a survey on evolutionary economics, aimed at exploring the main research paths and contributions using bibliometric methods. The documentation is based on an extensive review of the abstracts from articles published in all economic journals over the past 50 years gathered from the Econlit database. Evolutionary contributions have apparently not converged to an integrated approach. Two rather extreme main research strands emerged: 'History of Economic Thought and Methodology' and 'Games'. Whereas formal approaches have a reasonable and increasing share of published papers, purely empirical-related works are relatively scarce, representing a meagre and stagnant percentage of published works. This highlights the need to redirect the evolutionary research agenda.

Abstract
Entrepreneurial activities are seen as key drivers of innovation, job creation, and economic growth. Recent efforts are being pursued by several entities, including governments to promote entrepreneurial skills amongst the youngest. However, to design effective programs, policy makers have to uncover the determinants of entrepreneurship. To avoid that such efforts would be fruitless we argue that a multidisciplinary account of entrepreneurial intents among students is mandatory, circumventing past biased analysis towards business and engineering areas. Thus, in this paper we present the results of a survey to all final year university students of the largest Portuguese university. It encompasses a sample of 2430 students enrolled in 60 different courses of 14 schools/faculties. Results evidence that the average entrepreneurial intents reaches a reasonable (by international standards) figure of 27%, with students enrolled in non-traditionally entrepreneurial focused areas Humanities, Sports, Health and Sciences - and courses - Pharmacy, Veterinary, Law, Languages, History, History of the Arts and Archaeology, Sports, Biology and Chemistry, Dentistry - revealing higher entrepreneurial intents. Based on logit estimations, we further found that psychological factors, such as risk propensity, leadership profile, and creativeness, are the most important (positive) determinants of students' entrepreneurial intents. Contextual factors (e.g., family background and professional experience) failed to emerge as critical factors in explaining students' entrepreneurial intents - only business context emerged as important. Despite such results might at a first glance convey the idea that education policy for promoting entrepreneurship has limited application, we argue that it is not the case. What is required is different policy measures targeting students' attitudes and behaviors in both business and non business areas, avoiding the long-established mistake of confining entrepreneurial education related programs in business schools.

Abstract
This paper investigates the potential impact of increased R&D efforts and structural change in Portugal on labour productivity. Based on existing literature on the relation between R&D expenditures, structural change and productivity, we evaluate the contribution of R&D and hightech industries to productivity over the last 30 years. Our results confirm the importance of business R&D in the medium to high-tech sectors and of public R&D, as they stimulate productivity growth. However, we cannot support the hypothosis that productivity growth was primarily rooted in the development of medium-high technology industries.

Abstract
In a group setting, the exposure to different thinking styles and people promotes what is called creative abrasion, which, if properly managed, can greatly enhance the Innovation potential. This is the philosophy behind MIETE, which was conceived in 2004 to promote innovation and entrepreneurship with multidisciplinary teams. With this in mind, MIETE aims at adapting itself to the profiles of candidates from different areas including, amongst others, Management, Engineering, Biotechnology, Sciences and Design. In this paper the authors, report their experiences during the feedback sessions of the last two years with MIETE students, particularly in the 'Implementation and Strategies for Technology Comercialisation' workshops.

Abstract
Virtual Worlds are designed for sociability, environments where people have interaction with other people. Enterprises have already started exploring this new world as a way to provide a compelling new value proposition to their products and services. This paper makes a proposal for addressing the issue of interoperability between virtual and real-world business environments as a way to foster value creation opportunities as the virtual and real world interact with each other. To this end, the authors propose the Integration of 2nd Life object behaviour modelling within the actual Enterprise Engineering Life-Cycle in order to achieve a seamless enactment of both interoperable models in the virtual and real world. We believe therefore that our approach can bring value to most interaction types, especially in integration of the consumer in the value network and in strengthening the relationship between the consumer and the actual physical product. It is our believe that this will foster new opportunities for value creation, both in the interaction between the enterprises (including different segments of the network value chain) and in the interaction between these and actual the product or service consumer. © 2008 Nottingham University.