1,722,711 research outputs found
Salvatore Impellizzeri, La letteratura bizantina da Costantino agli iconoclasti
No full textWartelle André. Salvatore Impellizzeri, La letteratura bizantina da Costantino agli iconoclasti. In: Bulletin de l'Association Guillaume Budé, n°2, juin 1969. pp. 287-289
Impellizzeri (Salvatore), La letteratura bizantina da Costantino agli iconoclasti
No full textStiernon Daniel. Impellizzeri (Salvatore), La letteratura bizantina da Costantino agli iconoclasti. In: Revue des études byzantines, tome 25, 1967. pp. 302-304
Impellizzeri (Salvatore), La letteratura bizantina da Costantino agli iconoclasti
No full textStiernon Daniel. Impellizzeri (Salvatore), La letteratura bizantina da Costantino agli iconoclasti. In: Revue des études byzantines, tome 25, 1967. pp. 302-304
104. Impellizzeri (Salvatore). La letteratura bizantina da Costantino agli iconoclasti.
No full textGuilland Rodolphe. 104. Impellizzeri (Salvatore). La letteratura bizantina da Costantino agli iconoclasti.. In: Revue des Études Grecques, tome 79, fascicule 376-378, Juillet-décembre 1966. p. 806
Salvatore Impellizzeri, La morte di Digenis Akritas. (Extr. des Atti del Museo Pitré, I , 1950
No full textBolgiani Franco. Salvatore Impellizzeri, La morte di Digenis Akritas. (Extr. des Atti del Museo Pitré, I , 1950. In: Bulletin de l'Association Guillaume Budé,n°2, juin 1951. pp. 112-113
Intersubjective comparisons are possible with an accurate use of the Borg CR scales.
No full textComment on
Int J Sports Physiol Perform. 2010 Sep;5(3):406-11
New approaches in ortho-surgical treatments with stimulate & innovative technology
No full textThe aim of this study is to show the effectiveness of laser technology for the exposure of the palatally impacted canines, using a CO2 laser device (Smart US20D®, DEKA - Florence, Italy) and Diodi Laser device (Raffaello, DMT, Lissone, Italy, 980nm +645nm), which can stimulate the spontaneous eruption of the canine, without orthodontic traction application. Moreover, the purpose of this study is to monitor the movement of the impacted tooth after exposure with laser approach with digital technologies.
Another aspect of this study is focused on the differences between digital monitoring through scanner and conventional monitoring which is based exclusively on the clinical evaluation of the photos and the study of the plaster casts.
The final experimental sample was constituted of 18 patients, 9 females and 9 males; of these 8 patients showed a bilateral inclusion and 10 a mono-lateral inclusion of the canine, for a total of 26 canines. To demonstrate the validity of the technique applied to the study group, a CONTROL GROUP, which included 9 patients with unilateral and bilateral palatally impacted canines (in total 13 canines), treated by a traditional surgical-orthodontic approach, was observed.
This experimental project was conducted in order to evaluate the effectiveness of laser surgery as an alternative approach to conventional surgical-orthodontic treatment.
After laser exposure, no orthodontics treatment was initiated until the impacted tooth had erupted sufficiently into the palate and the autonomous eruption capacity was assessed.
The spontaneous eruption was quantified by measuring the millimeter distance between the cusp of the canine one week after surgery (released from the overlying mucous and bone tissues) and the cusp of the same after 16 weeks from laser surgery.
Of the 26 canines under study all of them performed a movement between 2,72 mm and 7,04 mm (mean value: 5,01 mm).
Therefore, we can state that, at the end of the evaluation period of 16 weeks, a significant teeth movement was observed. Furthermore, the exposure of part of the dental crown, allowed, in all cases treated, to apply a bracket or a button to align the tooth in the dental arch.
Our data suggests that the response of the dental element to the bio-stimulant action of the laser, applied to expose their crown, can be considered effective.
Of the values obtained, the ones most distanced from the mean value were considered (the highest values 6,9 and 7,04 and the minimum values 2,72 and 3,12) and the type of inclusion of treated canines to which they refer was evaluated.
The four values correspond to canines in bone inclusion; in particular, the millimetric value 7,04 corresponds to a deep inclusion canine.
Therefore, from what emerges from our study, no significant correlation was found between the extent of spontaneous eruption (in mm) and the type of inclusion.
A further purpose of this study was the evaluation of the possible different action between the CO2 laser (wavelength: 10600 nm; power: 4.5 Watts) used in super-pulsed emission mode (that no have bio-stimulation capacity) and the diode laser (wavelength: 980 nm + 645 nm; power: 4 Watts) used in continuous wave emission mode.
Comparing the millimeters of eruption of the canines treated with the two different types of lasers and applying the Student’s T-Test, we found a super-imposable value.
Moreover, the study groups (group A and group B) and the control group were compared in terms of mean eruption time, respectively spontaneous or forced by means of a Crozat orthodontic device, activated monthly to allow the displacement of the canines .I n the control group the duration of the orthodontic traction is, on average, 10 months. In the study groups the canine eruption was spontaneous and occurred in an average period of 4 months. It can be stated that, although a forced orthodontic traction was applied in the control group to allow tooth eruption, the eruption times in the study groups were significantly lower. The results obtained indicate the effectiveness of the new approach proposed by us, although performed on a small sample of patients. The results are significant from different points of view.
The advantages found in this study are numerous. The main advantages of digital monitoring are the possibility of evaluating parameters that cannot be evaluated analogically and of making measurements of distances normally calculated on plaster casts with compass and rubber with the respective errors. Other advantages are represented by the reduction of work time, due to the abolishing of the need to request plaster casts to the dental technician. Which also means the reduction of the costs of the laboratory and it also means less costs for the patients.
By eliminating the steps of the analogue impressions and of the plaster casts, the details are certainly represented with more precision and accuracy and there is a minimum error accumulated. This digital workflow that is created is also managed entirely by a single person, which represents a further saving of time.
Moreover, we have clinical advantages, that are the less discomfort of the patient who does not tolerate the classic impressions in alginate and of the orthodontist, and the reduction of the chair time. The application of the digital technologies in the monitoring helps the orthodontist to make clinical decisions supported on measurable data and not just on clinical experience. The our ortho-surgical protocol with the use of different technologies set off to a new concept of work in dentistry, in particular, in the cases characterized by impacted teeth or cases that expect an orthodontic and surgical approach. Finally, a not indifferent aspect consists in the reduce of treatment time, which is an advantage for both the orthodontist and the patient. It is consequence of the reduction of the steps and work-time, and it is due to the real monitoring that can be performed on the patient
Quantum confinement and light trapping effects in nanoporous Ge
No full textSemiconductors containing nanopores have gained a renewed interest as they are able to adsorb and interact with atoms and molecules and can thus be used in several interesting and emerging applications. Ge film and bulk samples, self-implanted with Ge+ ions, have shown to have a sponge-like nanoporous structure [1], as shown in fig.1. Possible applications of porous semiconductors include various novel sensors, solar cells, optoelectronic devices; they can be used for catalysis, biological molecular isolation and purification or electrodes for micro-fuel cells [2 and reference therein].
Optoelectronic characterization of the layers are carried out by Surface Photovoltage (SPV) Spectroscopy, a powerful technique which allows for obtaining detailed information on material optical properties, such as electronic transitions at gap states, and band to band transitions [2,3]. In addition, structural and microscopic analyses have been carried out in order to identify amorphous or crystalline phases and the average size of the nano- pores. Different nanoporous (np) structures have been investigated: crystalline and amorphous np-Ge obtained by implantation of bulk Ge, as well as crystalline and amorphous np-Ge obtained by ion implantation of Ge film grown on Si substrates by molecular beam epitaxy and sputtering. The effect of Au nanoparticles embedded within the nanoporous structure has been also investigated.
Changes in the SPV spectra as a function of ion implantation fluence and annealing treatments have been found and discussed on the basis of the structural properties of the samples [4]. A significant enhancement of the SPV signal in np-Ge samples decorated with Au nanoparticles has been shown, and related to enhanced light trapping effects. SPV spectra of np-Ge thin films show the main peak, which corresponds to band-to-band transitions, significantly blue shifted with respect to the same peak in bulk np-Ge (fig.2). This result has been assigned to a quantum confinement effect occurring at Ge nano- walls separating the nanopores. In addition, a strong enhancement of the SPV signal has been observed due to light confinement effects. Quantum confinement and light trapping effects demonstrated in nanoporous Ge film deposited on Si substrate can be of major interest for future photovoltaic applications of thin film solar cells.
[1] G Impellizzeri et al Nanotechnology 23, 395604 (2012)
[2] D Cavalcoli et al Microporous and Mesoporous Mat 196, 175–178 (2014)
[3] L Kronik and Y. Shapira, Surf Sci Rep. 37,1 (1999)
[4] D Cavalcoli et al, in Semiconductors and Semimetals, Elsevier, (2015
Salvatore Impellizzeri, Ugo Criscuolo, Silvia Ronchey, Michele Psello. Imperatori di Bisanzio (Cronografia). Introduzione di Dario Del Corno, vol. 1-2
No full textDarrouzès Jean. Salvatore Impellizzeri, Ugo Criscuolo, Silvia Ronchey, Michele Psello. Imperatori di Bisanzio (Cronografia). Introduzione di Dario Del Corno, vol. 1-2. In: Revue des études byzantines, tome 44, 1986. p. 296
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