A smartphone agent for QoE evaluation and user classification over mobile networks

The continuous growth of mobile users and bandwidth-consuming applications and the shortage of radio resources put a serious challenge on how to efficiently exploit existing networks and contemporary improve Quality of Experience. One of the most relevant problem for network operators is thus to find an explicit relationship between QoS and QoE, for the purpose of maximizing the latter while saving precious resources. In order to accomplish this challenging task, we present TeleAbarth, an innovative Android application entirely developed at TelecomItalia Laboratories, able to contemporary collect network measurements and end-users quality feedback regarding the use of smartphone applications. We deployed TeleAbarth in a field experimentation in order to study the relationship between QoS and QoE for video streaming applications, in terms of downstream bandwidth and video loading time. On the basis of the results obtained, we propose a technique to classify user behavior through his or her reliability, sensibility and fairness

At Home and Abroad: An Empirical Analysis of Innovation and Diffusion in Energy-Efficient Technologies

This paper contributes to the induced innovation literature by extending the analysis of supply and demand determinants of innovation in energy-efficient technologies to account for international knowledge flows and spillovers. In the first part of the paper we select a sample of 38 innovating countries and we study how knowledge related to energy-efficient technologies flows across geographical and technological space. We demonstrate that higher geographical and technological distances are associated with a lower probability of knowledge flow. In the second part of the paper, we use our previous estimates to construct stocks of internal and external knowledge for a panel of 17 countries and present an econometric analysis of the supply and demand determinants of innovation accounting for international knowledge spillovers. Our results confirm the role of demand-pull effects, as proxied by energy prices, as well as that of technological opportunity, as proxied by the knowledge stocks. In particular, this paper provides evidence that spillovers between countries have a significant positive impact on further innovation in energy-efficient technologies.Innovation, Technology Diffusion, Knowledge Spillovers, Energy-Efficient Technologies

Obtainment of chitosan with different molecular weight by varying chitin decarbonation conditions and study of a mathematical model representing the process

The effects of different chitin decarbonation conditions on chitosan molecular weight have been studied. The factors that could affect chitosan molecular weight and that have been studied in this work are temperature, time and hydrochloric acid concentration; the factor that proved to mostly affect the chitosan molecular weight is the temperature, followed by time and acid concentration. The effect of chitin molecular weight on the finally obtained deacetylation degree has also been studied, and proved to be almost irrelevant. The effect on chitosan molecular weight given by deacetylation carried out with different NaOH concentration has been analyzed; this factor proved to give inversely proportional effect on chitosan molecular weight

The Future Prospect of PV and CSP Solar Technologies: An Expert Elicitation Survey

In this paper we present and discuss the results of an expert elicitation survey on solar technologies. Sixteen leading European experts from the academic world, the private sector and international institutions took part in this expert elicitation survey on Photovoltaic (PV) and Concentrated Solar Power (CSP) technologies. The survey collected probabilistic information on (1) how Research, Development and Demonstration (RD&D) investments will impact the future costs of solar technologies and (2) the potential for solar technology deployment both in OECD and non-OECD countries. Understanding the technological progress and the potential of solar PV and CPS technologies is crucial to draft appropriate energy policies. The results presented in this paper are thus relevant for the policy making process and can be used as better input data in integrated assessment and energy models.Expert Elicitation, Research, Development and Demonstration, Solar Technologies

THE CAMBRIDGE-PERUGIA INVENTORY FOR ASSESSMENT OF BIPOLAR DISORDER

It is well known that Bipolar Disorder is a condition which is often under diagnosed or misdiagnosed. We propose an inventory of questions which will help assess the longitutinal history of the patient’s illness, and to evaluate the presence of mixed affective states, rapid cycling, and comorbidities, all of which have an important bearing on prognosis

Multiple Widespread Blue Nodules: A Clinicopathological Case

Glomangiomas are a variant of benign glomus tumours; glomus tumours are benign neoplastic proliferations of the glomus body, which is made up of perivascular smooth muscle cells. This forms arteriovenous anastomoses which play an important role in vascular regulation of skin temperature. The aim of this article is to describe 2 cases of hereditary glomangiomas

Eco-innovation and openness: Mapping the growth trajectories and the knowledge structure of open eco-innovation

Open innovation runs contrary to the individualistic mentality of traditional corporate R&D implementation while embracing external cooperation in a complex world. Our main motivation for the study is to assess and characterize knowledge structure that represents radical transformation toward accelerating co-development of sustainable innovations. Our review points to the role of the open eco-innovation research landscape as an emerging research domain of potential contributions to sustainable development. Specifically, in this systematic analysis, we apply exploratory, bibliometric, and network visualization techniques to characterize the available knowledge in the field. We trace the growth trajectory of this emerging literature and map the knowledge base of the open eco-innovation (OE) research field. We conceptualised four phases of research domain development and recognised that OE is at the acceleration phase. We emphasized that a synthetic knowledge base is one of the basic ingredients of an open eco-innovation model in addition to analytic and symbolic knowledge bases. Finally, we highlighted what might seem to be budding theoretical perspectives underlining open eco-innovation

Threshold policy effects and directed technical change in Energy Innovation

This paper analyzes the effect of environmental policies on the direction of energy innovation across countries over the period 1990-2012. Our novelty is to use threshold regression models to allow for discontinuities in policy effectiveness depending on a country's relative competencies in renewable and fossil fuel technologies. We show that the dynamic incentives of environmental policies become effective just above the median level of relative competencies. In this critical second regime, market-based policies are moderately effective in promoting renewable innovation, while commandand-control policies depress fossil based innovation. Finally, market-based policies are more effective to consolidate a green comparative advantage in the last regime. We illustrate how our approach can be used for policy design in laggard countries