1,722,153 research outputs found
The impact of the aggregation formula on indicator-based method for the assessment of building susceptibility to hydro-meteorological hazards
No full textA crucial variable in risk and vulnerability assessment procedures is the ability of the built environment to resist in case of hazard impact. This component, referred to as “susceptibility”, can be assessed in different ways, among which indicator-based methods are preferable when no data about past hazardous events are available. This type of methodology, considering the building susceptibility independent from the hazard magnitude, relies on the selection of indicators meaningful for the investigated area and their combination via an aggregation formula, leading to a susceptibility index for each building. The current study aims at reviewing and comparing different approaches used in literature to combine the indicators for calculating the susceptibility index. To this end, five indicators, previously selected for a mountainous case study area, are applied and implemented in a GIS platform, generating just as many specific susceptibility maps. Further, the indicators are weighed and combined in different scenarios with two aggregation formulae, which are integrated into the GIS environment so as to spatially display and compare the results. Last, but not least, the HBIM model and a GIS/BIM database of the studied area are created. Results suggest that the aggregation formula and the assigned weights are crucial ingredients, and therefore they should be chosen carefully according to the aim of the study and the needs of the stakeholders
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
Use of a NobleStitch EL Device for PFO Closure.
No full textCryptogenic stroke is the final diagnosis in almost 40% of ischemic acute cerebrovascular events. There is currently no definitive clinical evidence that percutaneous closure of patent foramen ovale (PFO) can prevent the recurrence of stroke or transient ischemic attack (TIA). Identification of the causes of neurologic ischemic syndromes is essential for any strategy intended to prevent the catastrophic consequences of cerebral infarction. Since the initial reports of an unexpectedly high prevalence of PFO in younger patients with cryptogenic stroke in 1988, there has been growing interest and experience in diagnosing and treating these patients, both medically and/or with percutaneous closure, in particular for the potential to eliminate paradoxical embolism via PFO, which is a likely mechanism for stroke in these patients. Selection of the appropriate occluder device is of paramount importance for the success of the procedure. While devices like the Amplatzer PFO Occluder (St. Jude Medical), which, based on the extended follow-up of the RESPECT Trial, was approved by the U.S. Food and Drug Administration last year for recurrent stroke prevention, have become generally accepted as being better than medical therapy for patients needing treatment, concerns remain regarding device- and procedure-related complications. NobleStitch EL is a novel device that offers a simple non-prosthetic implant method of PFO closure without the inherent risks seen with septal occluders: no risk of device embolization, device thrombosis or late erosion, and probably no risk of arrhythmia. Futhermore, there is no material that would hinder future access to the left atrium and no requirement for anti-coagulation
Hydatid cyst of the interventricular septum causing obstruction of the right ventricular outflow tract: cross-sectional echocardiographic, angiographic and pathological findings.
No full text
La parodontite ulcerativa necrotizzante; case report
No full textViene presentato il caso di una paziente ( J.M., F., 14 anni ), affetta da Sindrome di Kostmann (agranulocitosi infantile
geneticamente determinata). Prima del 1987, anno nel quale è stato introdotto nella terapia il G-CSF, i bambini
morivano a causa delle complicanze infettive. L’unica terapia in grado di guarire definitivamente i pazienti è
rappresentata dal trapianto di midollo. Il quadro ematologico-clinico della suddetta paziente è risultato assai grave
(percentuale dei neutrofili 27% ( range 40%-74% ), e frequenti infezioni settiche, in particolare, otite media cronica e
parodontite ulcerativa necrotizzante. La giovane paziente si è presentata nel nostro Istituto con importanti lesioni
necrotiche e ulcerative a carico della gengiva aderente e una mobilità di grado tre a carico di tutti gli elementi dentari e
difetti ossei verticali in corrispondenza di vari siti. Nel corso della prima seduta abbiamo asportato il tessuto necrotico
con l’ausilio di bisturi e pinzette ed abbiamo effettuato un’ablazione del tartaro dentario, la più profonda possibile,
compatibilmente con le condizioni cliniche. Abbiamo impiegato il perossido di idrogeno ( al 3% ) per la rimozione dei
depositi nelle aree necrotiche e come collutorio orale, con effetti favorevoli attribuiti all’azione di pulizia meccanica e
all’influenza dell’ossigeno sulla flora batterica anaerobica .Abbiamo istruito la paziente ad eseguire due volte al giorno
sciacqui con collutorio a base di clorexidina allo 0,2%, data la difficoltà nello spazzolamentoe si è reso necessario il
trattamento farmacologico supplementare con 250 mg di metronidazolo tre volte al dì in associazione ad
amoxicillina+acido clavulanico 1g due volte al dì, per la durata di 9 giorni. Con il completamento del trattamento di
fase acuta, abbiamo osservato una scomparsa della necrosi e della sintomatologia acuta. Le aree necrotiche sono andate
incontro a guarigione e i crateri gengivali presentano dimensioni ridotte, sebbene, persistano alcuni difetti. Tali siti
possono perciò richiedere in futuro un trattamento chirurgico: i crateri poco profondi possono essere rimossi mediante
una semplice gengivectomia, mentre difetti più profondi possono esigere interventi di chirurgia resettiva. Il trattamento
della NG non può ritenersi completo finchè non sia avvenuta l’eliminazione di tutti i difetti gengivali e si siano ricreate
le condizioni ottimali per il controllo futuro della placc
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