Search results for "SCOPE"
showing 10 items of 2420 documents
Observational Approach and Perspective
1983
Well you did not cover more than half of my planned talk! (laughter). Let me comment on interferometric techniques, in particular speckle imaging which you mentioned. Doing speckle imaging with the largest telescopes now available will not give you better than the theoretical resolving power of the telescope. With a 4m telescope that is about 30 marc sec in the visible. That happens to be the radius of the supergiant Betelguese. So you are not going to achieve much with speckle imaging on these stars. One technique which has not been adequately exploited is that of lunar occultation which can give much better angular resolution than speckle, of the order of 2-3 marc sec. By using suitably c…
Random Laser Based on TiO2–Nanomembranes
2012
We demonstrated directional random laser emission from a dye-doped polymer film in the presence of a scattering medium consisting of TiO 2 nanomembranes. Evidence for coexistence of extended and localized modes are presented.
Microleakage in Class II composite restorations with margins below the CEJ: in vitro evaluation of different restorative techniques.
2012
Objectives: The purpose of this in vitro study was to evaluate the microleakage in "deep" Class II composite restorations with gingival cavosurface margin below the CEJ (cemento-enamel junction) and restored with different techniques. Study Design: Fifty human teeth were used. In each tooth two standardized Class II slot cavities (on mesial and on distal surfaces) were prepared: the buccolingual extension of the cavities was 4 mm; the gingival wall was located in dentin/cementum (2 mm beyond the CEJ). The prepared teeth were randomly assigned to 5 experimental groups (of 10 specimens and 20 cavities each) and restored. Group 1: Filtek TM Supreme XTE Flowable (3MESPE) + Universal Filtek Supr…
In vitro study of the apical microleakage with resilon root canal filling using different final endodontic irrigants
2015
Background: Endodontic microleakage or microfiltration refers to the percolation of fluids and micro-organisms at the interface of the obturation material and the walls of the root canal system. The aim of this in vitro study was to compare apical microfiltration of Resilon root canal filling by employing three dif ferent final irrigant solutions. Material and Methods: 128 single-rooted teeth were employed. The crowns were sectioned horizontally at the cemento-enamel junction and instrumented with 5.25% sodium hypochlorite (NaOCl) and 17% EDTA gel to obtain an instrumented 040 apical caliber. An intermediate irrigation was performed with distilled water. The roots were then randomly assigne…
An In Vitro Stereomicroscopic Evaluation of Bioactivity between Neo MTA Plus, Pro Root MTA, BIODENTINE & Glass Ionomer Cement Using Dye Penetrati…
2021
The ideal root end filling material should form a tight seal in the root canal by adhering to the cavity walls. Several materials have been used for root end filling. The present study aims to find out and compare the bioactivity of Neo MTA Plus, Pro Root MTA White, BIODENTINE & glass ionomer cement as root end filling materials using 1% methylene blue as tracer. Materials and methods: 80 extracted human permanent maxillary anterior teeth were used in the study. They were divided into four groups. Specimens were sectioned transversely in the cervical area to separate the crown from the root. The root canal was obturated with gutta percha and zinc oxide eugenol sealers. Thereafter, each …
Sealing ability of five different retrograde filling materials.
1996
The sealing ability of Amalgam, Harvard-Cement, Diaket, gold-leaf, and Ketac-Endo as retrofilling materials was investigated. Paper cones were fixed with Harvard-Cement in the instrumented roots of 100 extracted human incisors. Apicectomy was performed and a 2-mm-deep retrograde cavity was prepared. Teeth were assigned to five groups (n = 20); each group received a different filling material. Surfaces of the roots were isolated with nail polish. Teeth, were stored in 1% methylene blue dye for 72 h. Roots were sectioned, and the depth of dye penetration was evaluated through a stereomicroscope. Retrofills with Ketac-Endo showed significantly less leakage compared with amalgam. There was no s…
Hiding in plain sight: observing planet-starspot crossings with the James Webb Space Telescope
2021
Transiting exoplanets orbiting active stars frequently occult starspots and faculae on the visible stellar disc. Such occultations are often rejected from spectrophotometric transits, as it is assumed they do not contain relevant information for the study of exoplanet atmopsheres. However, they can provide useful constraints to retrieve the temperature of active features and their effect on transmission spectra. We analyse the capabilities of the James Webb Space Telescope in the determination of the spectra of occulted starspots, despite its lack of optical wavelength instruments on board. Focusing on K and M spectral types, we simulate starspots with different temperatures and in differen…
Smart cities approach for Colombian Context. Learning from ITS experiences and linking with government organization
2015
The forecast (world bank) related to the growth of world population tends to be around 9000 million to 2050 and most of the people will live in the cities or in conurbations, this means that, a new approach for support the development of the cities needs to be analyzed. Currently, the mankind has developed and produce a lot of technology advances and many of them are related to the Information and communications technology (ICT). In this way, ICT has become in a key element for the development of the cities, even, introduce the ICT concept in the context of the cities has provoked a new scope for the cities that is called Smart City or Digital City. In this paper, it is presented an approac…
The Relationships Between Local and National Childcare Policies – A Comparison of Nordic and Southern European Cities
2015
We start by comparing the childcare systems in the 11 European cities, looking particularly at whether the childcare provision in these cities follows national provision levels or not. We then focus on analyzing the relationships between local and national childcare policies in four European cities: Bologna (Italy) and Terrassa (Spain) from Southern Europe, and Jyvaskyla (Finland) and Aalborg (Denmark) from the Nordic countries. The availability and use of childcare services are analyzed, as are other factors influencing the possibilities and obstacles of labour market participation for mothers with young children. The aim of this analysis is to demonstrate the significance of local welfare…
Wydatki gmin na usługi opiekuńcze a zmiany demograficzne w Polsce
2020
Local governments as the smallest units of territorial self‑government in Poland are responsible for providing care services. The growing number of the elderly can influence the expenditures level connected with ensuring proper care for them, and it may constitute a growing problem for local government, especially for districts with a lower level of socio‑economic development. In recent years, a quite high increase in benefits amount due to care services and specialist care services has been observed. Therefore, a question arises whether a significant dependence can be observed between the share of the elderly in the population and the degree of local governments’ financial burden due to pr…