1,720,975 research outputs found
Dinamiche di ricarica nella conoide del Trebbia
No full textANALIZZARE LE SERIE TEMPORALI DEI LIVELLI PIEZOMETRICI DELLE ACQUE SOTTERRANEE E DEI LIVELLI DEI CORSI D’ACQUA PERMETTE DI OTTENERE INDICAZIONI PRELIMINARI IN MERITO ALLE DINAMICHE DI RICARICA NATURALE DEI CORPI IDRICI SOTTERRANEI IN PARTICOLARI CONTESTI TERRITORIALI. LO STUDIO SULLA CONOIDE DEL TREBBIA NEL PIACENTINO
Surface water-groundwater interaction and nitrate persistence in unconfined high-conductivity aquifers investigated via time series analysis
No full textGroundwater monitoring and protection are crucial issues within the environmental policies of the European Union. European directives require to (i) identify and characterize groundwater bodies, and (ii) reach specific quantitative/qualitative standards for each identified aquifer. The Italian laws incorporate these indications and provide technical criteria to characterize groundwater bodies. In this context, strategies aimed at preventing groundwater depletion play a relevant role in the conservation of water resources. In this study, we focus on the analysis of the underlying mechanisms of natural recharge for an unconfined high-conductivity aquifer. In particular, we refer to the area of the Apennines alluvial fan of the Emilia-Romagna Region. The portion of the cones close to the Apennines consists in high-permeable deposits that extend up to several hundred meters underground. A monolayer phreatic aquifer, connected directly to the surface, is located in this area. Widespread water withdrawals are present for agricultural and industrial purposes. For this reason, the analysis of nitrate concentration in groundwater represents a crucial issue. The use of nitrogen fertilizers and spreading of sewage and sludge in the soil are considered the main sources of nitric pollution. Based on time series analysis, we investigate the natural recharge dynamics by observing the influence of hydrometric variations on the piezometry, and the relationship between water level and nitrate concentration in the aquifer. We do this by means of autoregressive moving average models. The basic idea is to represent hydrological time series as single realizations of stochastic processes. In this context, we provide a basis to estimate groundwater vulnerability through an insight on surface water-groundwater interaction, and the persistence associated with nitrate concentration in an unconfined high-conductivity aquifer
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
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
EP10.05: Firs trimester diagnosis of bilateral fibular aplasia, tibial campomelia and pligosyndactyly (FACTO) syndrome: a case report
No full textA 34 year old Caucasian p atient, para 1, was referred to our
maternal fetal medicine unit at 12 weeks and 5 days, for suspected
fetal structural abnormality affecting lower limbs.
An accurate fetal scan w as performed, showing a single fetus
with crown-rump length normal for dates. Nuchal translucency was
within normal ranges.
The examination of lower limbs showed, for both sides, absence
of the fibula, tibial campomelia, talipes valgus, short femur and
oligosyndactyly. In addition, examination of upper limbs showed
oligosyndactyly involving both hands. Prenatal invasive testing
was offered and the patient refused. The ultrasound findings
were suggestive of a fibular aplasia, tibial Campomelia and
oligosyndactyly (FACTO) syndrome.
After genetic and orthopedic counselling about treatment
options, prognosis and possible management, the couple opted
for termination of pregnancy at 15 weeks of gestation. Postnatal
evaluation confirmed the prenatal findings and diagnosis.
Fibular hemimelia-aplasia is a rare abnormality, with estimated
incidence of less than 1 per 50000 births. The exact etiology is
still unclear. Generally the defect is unilateral, more commonly
on the right side. The short/absent fibula can affect the normal
development of the tibia, resulting in associated bowing and
angulation of the latter (tibial campomelia). The position of the
ankle can also be affected, resulting in talipes valgus, as in our case.
A typical association is with tarsal anomalies, including agenesis or
hypoplasia. The ipsilateral foot usually lacks of lateral rays, resulting
in oligosyndactyly. This condition has usually been reported as
unilateral, involving just one of the lower limbs.
In conclusion we report the very rare occurrence of fibular aplasia
involving both limbs, showing all the abnormalities peculiar of the
FACTO syndrome, diagnosed in the first trimester of pregnancy
Green Smart Technology for Water (GST4Water): Life Cycle Analysis of Urban Water Consumption
Full text linkThe increasing scarcity of water is encouraging strategies in water saving and urban water
management systems devoted to reducing natural resource consumption and environmental impact.
At household and urban scales, there is an increasing interest in onsite greywater and non-potable
water reuse systems in order to improve water availability. In this framework, the project GST4Water
funded by the European Union (EU) under the POR-FESR 2014–2020 Program of Emilia-Romagna
Region, has been developed with the aim to implement water consumption monitoring systems, to
define solutions for greywater reuse, and to develop tools for environmental sustainability evaluation
applied to water systems. The present study focuses on this last goal, performing a life cycle
assessment of the solutions optimized at a district level. In particular, six different scenarios are
compared, starting from two models considering traditional water supply together with or without
energy consumption related to hot water generation, and five additional models related with different
assumptions in terms of greywater recovery systems, and energy and hot water production, at varying
percentages of renewable and photovoltaic energy supply. Finally, an evaluation of the return time of
environmental investment is carried out, based on the results obtained through the scenario analysis
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