Polytechnic University of Milan

About: Polytechnic University of Milan is a education organization based out in Milan, Italy. It is known for research contribution in the topics: Computer science & Finite element method. The organization has 18231 authors who have published 58416 publications receiving 1229711 citations. The organization is also known as: PoliMi & L-NESS.

The Provision of Finance to Innovation: A Survey Conducted among Italian Technology-based Small Firms

Abstract: Financial constraints to the development of innovation are often considered one of the main impediments to high-technology firms seeking to expand and grow. In particular this is the case of small and medium size high-tech firms. In the U.S. and the U.K. a variety of sources of finance are available to the start-ups of innovative firms; in the other European countries, and particularly in Italy, these means are still uncommon so that the development of technology is often prevented. This paper, based on an empirical analysis on a survey of 46 small high-tech Italian firms, aims at exploring the problems experienced by small businesses in gaining access to debt and equity finance. The results highlight that traditional financial sources are inadequate to finance innovative projects. The questioned firms rely mainly on personal finance, and secondly on short term bank debt; they are truly involved in maintaining control over the firm activities and are willing to issue outside equity only if the new investors also provide non financial competencies. Among the 46 interviewed firms, only 10 are willing to be listed in the future on small firms' stock markets.

More than one million barriers fragment Europe's rivers.

Abstract: Rivers support some of Earth's richest biodiversity1 and provide essential ecosystem services to society2, but they are often fragmented by barriers to free flow3. In Europe, attempts to quantify river connectivity have been hampered by the absence of a harmonized barrier database. Here we show that there are at least 1.2 million instream barriers in 36 European countries (with a mean density of 0.74 barriers per kilometre), 68 per cent of which are structures less than two metres in height that are often overlooked. Standardized walkover surveys along 2,715 kilometres of stream length for 147 rivers indicate that existing records underestimate barrier numbers by about 61 per cent. The highest barrier densities occur in the heavily modified rivers of central Europe and the lowest barrier densities occur in the most remote, sparsely populated alpine areas. Across Europe, the main predictors of barrier density are agricultural pressure, density of river-road crossings, extent of surface water and elevation. Relatively unfragmented rivers are still found in the Balkans, the Baltic states and parts of Scandinavia and southern Europe, but these require urgent protection from proposed dam developments. Our findings could inform the implementation of the EU Biodiversity Strategy, which aims to reconnect 25,000 kilometres of Europe's rivers by 2030, but achieving this will require a paradigm shift in river restoration that recognizes the widespread impacts caused by small barriers.

Control and monitoring for railway vehicle dynamics

Abstract: Over the last twenty to thirty years, railway vehicle dynamics has changed from being an essentially mechanical engineering discipline to one that is increasingly starting to include sensors, electronics and computer processing. This paper surveys the application of these technologies to suspensions and running gear, focused upon the complementary issues of control (which has been reviewed within Vehicle System Dynamics previously) and monitoring (which has not previously been reviewed). The theory, concepts and implementation status are assessed in each case, from which the paper identifies the key trends and concludes with a forward look at what is likely to develop over the next years.