323,168 research outputs found
Foreign body mimicking an oral pathology
No full textForeign bodies’ adherence to the hard palate is unusual and can mimic an oral pathology. The diagnosis of this foreign body is challenging: it is based on an amnestic history, unspecific or absent symptoms and oral examination. The oral examination could be difficult when dealing with paediatric patients. Imaging techniques may mislead and so an exam under anaesthesia is often necessary to make the proper diagnosis. We report a case of 2 years-old male child referred to our attention for a strange lesion on the hard palate. After poorly significant MRI, we were unable to perform an oral examination and a general anaesthesia procedure was performed. A small translucent mass that turned out to be a piece of plastic adherent to the hard palate, was removed
Herschel-ATLAS : deep HST/WFC3 imaging of strongly lensed submillimetre galaxies
No full textThis work is supported by STFC (grants PP/D002400/1 and ST/G002533/1)We report on deep near-infrared observations obtained with the Wide Field Camera-3 (WFC3) onboard the Hubble Space Telescope (HST) of the first five confirmed gravitational lensing events discovered by the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS). We succeed in disentangling the background galaxy from the lens to gain separate photometry of the two components. The HST data allow us to significantly improve on previous constraints of the mass in stars of the lensed galaxy and to perform accurate lens modelling of these systems, as described in the accompanying paper by Dye et al. We fit the spectral energy distributions of the background sources from near-IR to millimetre wavelengths and use the magnification factors estimated by Dye et al. to derive the intrinsic properties of the lensed galaxies. We find these galaxies to have star-formations rates (SFR) ∼ 400–2000 M⊙ yr−1, with ∼(6–25) × 1010 M⊙ of their baryonic mass already turned into stars. At these rates of star formation, all remaining molecular gas will be exhausted in less than ∼100 Myr, reaching a final mass in stars of a few 1011 M⊙. These galaxies are thus proto-ellipticals caught during their major episode of star formation, and observed at the peak epoch (z ∼ 1.5–3) of the cosmic star formation history of the Universe.Peer reviewe
RECONSTRUCTION MORPHOSTRUCTURAL ANALYSIS OF FIBULA BONE OSTEOTOMIES WITH PIEZOSURGICAL DEVICE IN JAWS RECONSTRUCTION: A MIRROR OF A NEW FASTER PIEZOELECTRICAL OSTEOTOME
No full textBACKGROUND: Segmentation of vascularized bone flaps with piezoelectrical device is a valuable alternative to conventional cutting methods because it improves the intraoperative safety of the procedure. The time needed for completion of a single osteotomy with the piezoelectric device is longer than with the oscillating saw. However, the time normally needed to dissect and protect both the periosteum and the pedicle at each osteotomic site is greatly reduced. In 2015 a new piezoelectrical device suitable for highly mineralised bone and significantly efficient through all the cutting depth was engendered. Hardness and thickness of human fibula bone cortex may be fitting for this new piezoelectrical osteotome. AIM: We present and discuss the use a new generation of the piezoelectric bone-cutting device in microvascular free bone flap for the reconstruction of jawbone defects. The aim of this study was to evaluate on human fibula the time required for completion of each osteotomy comparing new piezoelectrical device and previous commercial device. A comprehensive study that evaluates and compares histomorphometry and histology of bone surfaces created with two piezosurgical devices is carried out.
MATERIALS AND METHOD: In 2016 seven consecutive patients underwent microsurgical reconstruction of the jaws. One specimen from each fibular bone diaphysis was harvested with the piezoelectric device and histologically evaluated.
CONCLUSIONS: The new generation piezoelettrical device halves the time needed for linear and wedge osteotomies on human fibula flap compared to tradizional piezoelectrical device. No significant histological and histomorphometrical differences are detected between bone surfaces osteotomized with both devices
Orbital approaches for primary and secondary tumours
No full textBackground: Orbital tumours are uncommon and represent approximately only 3.5 - 4 % of ophthalmic disease. Most published articles report case report, comparative studies with small numbers of patients or non-comparative studies with limited statistical power to provide clear treatment and reconstructive recommendations.
Purpose: This paper reports our experience in treating orbital tumours. In particular, we analyzed both epidemiology, histology, methods of treatment and follow up. Particular emphasis is laid on the complications and aesthetic results of the different surgical approaches.
Method: A retrospective study was carried out of 152 patients with orbital masses treated at Head and Neck Surgery Department of the University Hospital of Modena between January 2001 and the end of March 2016. The follow-up period begins in 2001 and finish by the 31th of March 2015. The survival has been calculated according to Kaplan-Meyer method (using IBM SPSS Statistics 20).
Discussion: The median survival was ninety-six months. The cumulative survival at 12 months was 88 %; it came to 78 % in 24 months. The cumulative survival at 5 aa (60 months ) was 77 %.
The lowest survival was showed in patients treated with an extensive osteotomy or exenteration. This result, however, could not be linked to the surgical approach but it could be due to the poor prognosis of the more advanced tumours and to the intracranial lesions involvement. Patients undergoing extensive osteotomies presented the greatest number of complications : 25 % complained of diplopia , 10% a decrease of visual acuity and 15 % had lagophthalmos , in two cases with epiphora .
Conclusion: Preserving the contents of the orbital cavity and function is often possible after radical excision. However, conservative purposes have not to impair the oncologic efficacy
Herschel-ATLAS/GAMA : SDSS cross-correlation induced by weak lensing
No full textThe work has been supported in part by the Spanish Ministerio de Ciencia e Innovacion, AYA2012-39475-C02-01, and Consolider-Ingenio 2010, CSD2010-00064, projects and by ASI/INAF Agreement I/072/09/0 for the Planck LFI activity of Phase E2. JGN acknowledges financial support from the Spanish CSIC for a JAE-DOC fellowship, co-funded by the European Social Fund. MN acknowledges final support from PRIN INAF 2012 project ‘Looking into the dust-obscured phase of galaxy formation through cosmic zoom lenses in the Herschel Astrophysical Large Area Survey’.We report a highly significant (> 10 sigma) spatial correlation between galaxies with S-350 mu m a parts per thousand yen 30 mJy detected in the equatorial fields of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) with estimated redshifts a parts per thousand(3) 1.5, and Sloan Digital Sky Survey (SDSS) or Galaxy And Mass Assembly (GAMA) galaxies at 0.2 a parts per thousand currency sign z a parts per thousand currency sign 0.6. The significance of the cross-correlation is much higher than those reported so far for samples with non-overlapping redshift distributions selected in other wavebands. Extensive, realistic simulations of clustered sub-mm galaxies amplified by foreground structures confirm that the cross-correlation can be explained by weak gravitational lensing (mu < 2). The simulations also show that the measured amplitude and range of angular scales of the signal are larger than can be accounted for by galaxy-galaxy weak lensing. However, for scales a parts per thousand(2) 2 arcmin, the signal can be reproduced if SDSS/GAMA galaxies act as signposts of galaxy groups/clusters with halo masses in the range 10(13.2)-10(14.5) M-aS (TM). The signal detected on larger scales appears to reflect the clustering of such haloes.Peer reviewe
Designing with Nature Climate-Resilient Cities: A Lesson from Copenhagen
No full textClimate change is accelerating more than expected, and many cities are still unprepared for this transition.
The need to revise the approach to the design of public space points the attention toward the enhancement
of design figures that can convey different knowledge for adaptation to climate change. It emerges how the
landscape architect through nature-based solutions can be the figure able to regenerate the urban fabric of
the city. The case study of this research is the city of Copenhagen, which has become the stage of the most
innovative experiments to create climate-resilient urban spaces. It emerges how a multidisciplinary and
site-specific approach can be the ingredients of a transition that occurs only with innovative project
management in which municipalities, private stakeholders, and citizens work together. The NBS, therefore
the ecosystem approach to the project, proves to be able to respond to environmental, social, and economic
challenges
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
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