1,721,139 research outputs found
THE MEANING OF ENDEMISM IN PHYTOGEOGRAPHY
Full text linkThe definition of endemism is a relative concept, and is relative to the size of the territory and the hierarchical rank of the taxon one is referring to.
The more the territory is small, less you would expect to find in it the whole areal of taxa which ranks are high as a family or an order. Here is the case to cite FAVARGER (1969): "It is the scale that creates the phenomenon."
The criterion for the definition of endemism is therefore the exclusive membership to a certain geographical territory taken as a reference, not the size of the range of taxon
A model of Regulatory Impact Analysis (RIA) of incentives for the production of biomass energy
No full textthe growing interest in bioenergy and the widespread opinion that bioenergies diffusion would generate several benefits in the Italian economic context, are some reasons to make the biomass a significant topic for analysis from an economical point of view, in order to highlight impacts on local and national economy. This paper presents a model of “extended” Regulatory Impact Analysis (RIA), based on operator – disaggregate financial analysis; the aim is to evaluate the efficiency and the efficacy of the whole regulatory system affecting the territory and the sector interested by the norm itself. This model of RIA allows verifying regulatory norm "extended" feasibility, placing the norm within a broader and more significant syste
Isolating real-Time safety-critical embedded systems via sgx-based lightweight virtualization
No full textA promising approach for designing critical embedded systems is based on virtualization technologies and multi-core platforms. These enable the deployment of both real-Time and general-purpose systems with different criticalities in a single host. Integrating virtualization while also meeting the real-Time and isolation requirements is non-Trivial, and poses significant challenges especially in terms of certification. In recent years, researchers proposed hardware-Assisted solutions to face issues coming from virtualization, and recently the use of Operating System (OS) virtualization as a more lightweight approach. Industries are hampered in leveraging this latter type of virtualization despite the clear benefits it introduces, such as reduced overhead, higher scalability, and effortless certification since there is still lack of approaches to address drawbacks. In this position paper, we propose the usage of Intel's CPU security extension, namely SGX, to enable the adoption of enclaves based on unikernel, a flavor of OS-level virtualization, in the context of real-Time systems. We present the advantages of leveraging both the SGX isolation and the unikernel features in order to meet the requirements of safety-critical real-Time systems and ease the certification process
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Towards Fault Propagation Analysis in Cloud Computing Ecosystems
No full textNowadays, Cloud Computing is a fundamental paradigm that provides computational resources as a service, on which users heavily rely. Cloud computing infrastructures behave as an ecosystem, where several actors play a crucial role. Unfortunately Cloud Computing Ecosystems (CCEs) are often affected by outages, such as those experienced by Amazon Web Service in the last years, that result from component faults that propagate through the whole CCE. Thus, there is still a need for approaches to improve CCEs' reliability. This paper discusses both existing approaches and open challenges for the dependability evaluation of CCEs, and the need for novel techniques and methodologies to prevent fault propagation within CCEs as a whole
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Coupling transfer function and GIS for assessing non-point source groundwater vulnerability assessments at regional scale
No full textNon-point-source groundwater vulnerability assessments at regional scale by coupling of GIS and transfer function.
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