1,721,093 research outputs found
Does increasing compulsory education decrease or displace adolescent crime? New evidence from administrative and victimization data
No full textThis article estimates the contemporaneous effect of education on adolescent crime by exploiting the implementation a reform that increases the school leaving age in Italy by 1 year. We find that the Reform increases the enrollment rate of all ages but decreases the offending rate of 14-year-olds only, who are the age group explicitly targeted by the Reform. The effect mainly comes from natives males, while females and immigrants are not affected. The Reform does not induce crime displacement in times of the year or of the day when the school is not in session, but it increases violent crimes at school. By using measures of enrollment and crime, as well as data at the aggregate and individual level, this article shows that compulsory education reforms have a crime-reducing effect induced by incapacitation but may also lead to an increase of crimes in school facilities plausibly due to a higher concentration of students
A 13 kg intra-abdominal mass: a case of mesenteric fibromatosis.
No full textMesenteric fibromatosis is a benign fibrous tumor, characterized by
proliferations of fibroblasts and myofibroblasts, locally aggressive but
non-metastasizing. It can occur rarely in association with familial adenomatous
polyposis or sporadically (related with previous trauma, abdominal surgery or
prolonged estrogens intake). Small bowel mesentery is the most common site of
origin of mesenteric fibromatosis. The authors report a case of a 47-years-old
male with a large mass involving the mesentery of the first jejunal loops. The
patient was symptomatic for nausea and referred an increasing abdominal
circumference; a CT scan showed a huge mass (34 × 29 × 15 cm) very close to the
superior mesenteric vessel roots. The surgical treatment consisted in the en bloc
removal of the mass weighting 13 kg
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
Isolated congenital heart block in undifferentiated connective tissue disease and in primary Sjogren's syndrome: a clinical study of 81 pregnancies in 41 patients
No full textReumatismo. 2005 Jul-Sep;57(3):180-6.
[Isolated congenital heart block in undifferentiated connective tissue disease and in primary Sjögren's syndrome: a clinical study of 81 pregnancies in 41 patients].
[Article in Italian]
Grava C, Ruffatti A, Milanesi O, Favaro M, Tonello M, Calligaro A, Del Ross T, Todesco S.
Source
Cattedra e Unità Operativa di Reumatologia, Università degli Studi di Padova. [email protected]
Abstract
OBJECTIVE:
To study the incidence and the features of congenital heart block (CHB) in patients with undifferentiated connective tissue disease (UCTD) and primary Sjögren's syndrome (pSS).
METHODS:
We studied 81 pregnancies of 41 women attending the Outpatients' Clinic of the Rheumatology Unit of University Hospital of Padova from July 1989 to March 2004. Twenty five of these (61%) were affected with UCTD and 16 (39%) with pSS. Serologic inclusion criteria was anti-Ro/La positivity, assessed by counterimmunoelectrophoresis and ELISA.
RESULTS:
CHB was found in 2 out of the 46 (4.3%) pregnancies followed by our Staff and in 2 out of the 35 (5.7%) included in the retrospective part of the study. In 3 cases CHB was a 3rd degree block, causing pregnancy termination in 2. The only 2nd degree block was identified in one patient at the 22nd week of gestation and treated with dexamethasone and plasma-exchange. All of the women were positive to 52 kd and 60 kd Ro autoantibodies. CHB mothers had higher titer antibodies to 52 kd Ro protein than did the mothers with healthy infants (P = 0.026). Electrocardiographic abnormalities at birth were found in 3 out of 29 asymptomatic infants. One presented sinus bradycardia, the second abnormalities of ventricular repolarization, both regressed spontaneously, while the third ventricular extrasystoles which continue even now at 5 months.
CONCLUSIONS:
These results showed that in UCTD and pSS there is a higher incidence of CHB than that reported in Systemic Lupus Erythematosus. Electrocardiographic screening in all infants born to mothers with anti-Ro/La antibodies would seem an important measure to identify those with irreversible heart conduction abnormalities.
PMID:
16258602
[PubMed - indexed for MEDLINE
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Laboratory classification categories and pregnancy outcome in patients with primary antiphospholipid syndrome prescribed antithrombotic therapy
No full textBACKGROUND: A relationship between antibody profile and pregnancy outcome in patients with a previous diagnosis of primary antiphospholipid syndrome (APS) has not been clearly documented.
METHODS: Women attending our Center with primary APS characterized by the presence in the blood of one or more of the following: Lupus Anticoagulant (LA), IgG/IgM anticardiolipin (aCL), IgG/IgM anti-human beta2-Glycoprotein I (abeta2GPI) antibodies (confirmed after a minimum of 3 months) were considered eligible for this study. Women who became pregnant during the study period with the exception of those with congenital thrombophilia or other congenital abnormalities were included in our analysis. Primary outcome events, defined as early abortion or fetal death, were evaluated in relation to the laboratory classification category assigned to each patient at the time they were diagnosed with APS.
RESULTS: A total of 97 pregnancies occurring in 79 primary APS patients during the study period were analyzed. Twelve out of 97 pregnancies were unsuccessful, 11 out of 65 (16.9%) in category I patients (more than one positive laboratory test) and 1 out of 32 (3.1%) in category II patients (single positive test; adjusted hazard ratio 1.9; 95% CI, 0.2 to 18.9, p=0.6). Pregnancy loss took place in 10 out of 19 pregnancies (52.6%) in women belonging to category I with triple positivity and in 1 out of 46 pregnancies (2.2%) in patients with double positivity. The rate of pregnancy loss was more frequent in the 19 pregnancies of patients with triple positivity than in the 46 pregnancies of double positive patients (adjusted hazard ratio 23, 95% CI, 1.3 to 408, p=0.03).
CONCLUSION: Poor pregnancy outcomes occur more frequently in category I than in category II primary APS patients. However, it has been seen that a greater predictability is achieved when category I patients are grouped into triple and double positivity states
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