1,720,990 research outputs found
Waste Dynamics, Country Heterogeneity and European Environmental Policy Effectiveness
No full textWe empirically test delinking of waste dynamics with regard to economic growth and the effectiveness of environmental and specific waste-related policies, by exploiting a newly constructed, integrated waste-economic-policy dataset based on official data for the EU15 for 1995-2007. We find that absolute delinking is far from being achieved in the EU despite fairly stringent and longstanding policy commitment that goes back to the mid 1990s, but which however is biased towards waste management and waste disposal rather than waste prevention. Policy as well as country structural factors seem to impact on landfill diversion. Nevertheless, country heterogeneity matters: SURE based analyses show that EU average figures often hide high variance. Their results provide food for thought for a new EU waste policy strategy aimed mainly at landfill diversion and delinking, within a framework strongly oriented to allowing countries to decide about the implementation of EU directives
Testing deviations from the inverse square law with a freely falling gravity gradiometer at Balloon altitudes
No full textWe discuss a null experiment to search for the fifth force at ranges around 10 km. It is proposed to use a three-axis gravity gradiometer to measure the trace of the Earth gravity tensor from a freely falling elevator dropped by a balloon. The main error sources are considered to some extent
Rifiuti generati, rifiuti in discarica ed efficacia delle politiche ambientali in Europa
No full textSi presentano varie analisi empiriche sul disaccoppiamento tra dinamiche di generazione e conferimento in discarica dei rifiuti e crescita economica, integrate da disamine sulla efficacia delle politiche ambientali europee, utilizzando un dataset originale che integra fonti EUROSTAT con indicatori di policy nel periodo 1995-2007 per l’Europa a 15. Si riscontra un delinking assoluto, con vari effetti che mostrano l’efficacia delle politiche introdotte in Europa da metà anni novanta, per il conferimento in discarica, ma non per la generazione dei rifiuti, associata ad una elasticità rispetto al reddito in calo, ma ancora positiva. Le politiche come da attese non hanno avuto effetti sull’obiettivo di riduzione della generazione dei rifiuti, che ancora cresce e crescerà nei prossimi anni. La densità di popolazione è un fattore strutturale che appare ridurre sia generazione sia conferimento in discarica. Tuttavia, come da attese, l’eterogeneità tra paesi gioca un ruolo importante. Modelli panel SURE evidenziano come le regolarità statistiche medie europee nascondano spesso specificità che consentono di raggruppare i paesi in base alle diverse performance sulla relazione rifiuti-crescita economica, mettendo anche in luce il rischio di recoupling. Le analisi empiriche panel con fini di analisi ex post delle politiche mostrano di poter avere una forte rilevanza nel supporto alla implementazione e modulazione nazionale delle future politiche sui rifiuti in Europa.Curve di Kuznets, produzione di rifiuti, disaccoppiamento, discariche dei rifiuti
Analysis of effects of initial conditions and physical parameters in a differential accelerometer modeled as a multibody system
No full textDevelopments of the general relativity accuracy test (GReAT): a ground-based experiment to test the weak equivalence principle
No full textAbstract. Some future tests of the weak equivalence principle (WEP) with laboratory-size proof masses are likely to be conducted in freefall conditions in order to improve the test accuracy substantially. Some years ago the authors of this paper proposed to test the WEP in a vertical free fall inside a capsule released from a high-altitude balloon. The estimated accuracy in testing the WEP, with a 95% confidence level, is a few parts in 10^15 in a 30 s free fall. When compared with other proposed orbital free fall experiments and ground-based tests, the vertical free fall retains some key advantages of the former without some of the disadvantages of the latter. Moreover, a two orders of magnitude increase in the accuracy of testing the WEP could be achieved with an affordable experiment that allows us to recover the detector and repeat the launches at short time intervals
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“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
Get PDFWe 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
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