Risk factors associated with adverse fetal outcomes in pregnancies affected by Coronavirus disease 2019 (COVID-19): a secondary analysis of the WAPM study on COVID-19.

Objectives To evaluate the strength of association between maternal and pregnancy characteristics and the risk of adverse perinatal outcomes in pregnancies with laboratory confirmed COVID-19. Methods Secondary analysis of a multinational, cohort study on all consecutive pregnant women with laboratory-confirmed COVID-19 from February 1, 2020 to April 30, 2020 from 73 centers from 22 different countries. A confirmed case of COVID-19 was defined as a positive result on real-time reverse-transcriptase-polymerase-chain-reaction (RT-PCR) assay of nasal and pharyngeal swab specimens. The primary outcome was a composite adverse fetal outcome, defined as the presence of either abortion (pregnancy loss before 22 weeks of gestations), stillbirth (intrauterine fetal death after 22 weeks of gestation), neonatal death (death of a live-born infant within the first 28 days of life), and perinatal death (either stillbirth or neonatal death). Logistic regression analysis was performed to evaluate parameters independently associated with the primary outcome. Logistic regression was reported as odds ratio (OR) with 95% confidence interval (CI). Results Mean gestational age at diagnosis was 30.6+/-9.5 weeks, with 8.0% of women being diagnosed in the first, 22.2% in the second and 69.8% in the third trimester of pregnancy. There were six miscarriage (2.3%), six intrauterine device (IUD) (2.3) and 5 (2.0%) neonatal deaths, with an overall rate of perinatal death of 4.2% (11/265), thus resulting into 17 cases experiencing and 226 not experiencing composite adverse fetal outcome. Neither stillbirths nor neonatal deaths had congenital anomalies found at antenatal or postnatal evaluation. Furthermore, none of the cases experiencing IUD had signs of impending demise at arterial or venous Doppler. Neonatal deaths were all considered as prematurity-related adverse events. Of the 250 live-born neonates, one (0.4%) was found positive at RT-PCR pharyngeal swabs performed after delivery. The mother was tested positive during the third trimester of pregnancy. The newborn was asymptomatic and had negative RT-PCR test after 14 days of life. At logistic regression analysis, gestational age at diagnosis (OR: 0.85, 95% CI 0.8-0.9 per week increase; pPeer reviewe

Il rilievo nautico: dal filo a piombo all'acquisizione digitale tridimensionale - Il processo di modellazione

Attravero l'approfondimento delle metodologie di rilievo digitale e della modellazione 3D, ci si propone di migliorare il processo progettuale in termini di tempi e di qualità dei prodotti. La modellazione tridimensionale a partire da dati di rilievo risulta quindi particolarmente importante qualora si abbia la necessità di effettuare ad esempio delle modifiche alla forma di uno scafo, per le analisi idrodinamiche o per la prototipazione dello stesso

Temporary made permanent - Turning temporary exhibitions into fixed memories

The museum institution deals with the study, the storage and the fruition of cultural heritage. To fulfill these functions the museum uses, as well as the opinion of experts, even the most modern technologies. In this article we present some cases in which the use of digital and virtual reality effectively contributes to increase the knowledge on cultural heritage. In the last years there have been many studies to allow cultural heritage to be preserved with great care, ensuring the memory for scholars but also for future generations. The methods for storing a cultural object are widely studied, but the best techniques to preserve different forms of heritage like temporary or intangible items, are still under discussion. In particular this article refers to the possibility of keeping track of the information contained in a temporary exhibition project, that by its nature exists for a limited amount of time before being finally destroyed or transferred. With the use of standard tools like photogrammetry and three-dimensional modeling we try to define a process in order to turn the temporary into permanent, both for archiving purposes or for allowing the public to access the temporary installation once the physical object has been dismounted

Low Cost Characterization Of 3d Laser Scanners

The calibration of a range camera greatly influences the whole 3D acquisition and modeling process, allowing to minimize the equipment inaccuracy. However, depending on the range camera openness, we might have systems pre-calibrated only once by the industrial manufacturer or systems requiring a regular (and mandatory) end-user calibration before any scan session. Independently of the calibration approach, the metrological system characterization represents a point of paramount importance for making the user aware of the actual performances of his equipment. This permits the choice of appropriate resolution in 3D scan planning and allows to properly interpret the feedback indices during the alignment of several range maps trough Iterative Closest Point (ICP). Finally, in polygonal model editing, the modification of geometrical features is greatly helped by the awareness about the 3D capturing device performances. These remarks are effective for both triangulation based instruments, like Minolta Vivid 910, ShapeGrabber SG100 and SG1000 evaluated in this paper, or TOF based instruments. The proposed experimental method is based on post processing of the range data produced by acquiring the surface of a precise test object with a 3D laser scanner. In this procedure resolution, accuracy, and precision parameters are obtained sequentially, through the application of a set of simple geometric processing steps. Such operating easiness make this approach a possible candidate as a mandatory step in any 3D acquisition and modeling project

Maternal and Perinatal Outcomes of Pregnant Women with SARS-COV-2 infection

To evaluate maternal and perinatal outcomes of pregnant women affected by SARS-COV-2