Serbian Virtual Observatory

We review the newly established project of Serbian Virtual Observatory. In the last few years Virtual Observatories are becoming a new concept in the world of astronomy. The main aim of Virtual Observatories is to make accessible astronomical data to astronomers regardless of their geographical location as well as provide them with tools for analysis. The project of Serbian Virtual Observatory aims to achieve the following goals: 1) establishing SerVO and join the EuroVO and IVOA 2) establishing SerVO data Center for digitizing and archiving astronomical data obtained at Serbian observatories 3) inclusion of BelData/STARK-B and other theoretical and simulated data in SerVO 4) development of tools for visualization of dat

Stark broadening parameter tables for Be III

Using a semiclassical approach, we have calculated electron-, proton-, and He II-impact line widths and shifts for 52 Be III multiplets as a function of temperature and perturber density. The electron temperatures are 10,000 K 20,000 K; 50,000 K; 100,000 K 200,000K and 300,000 K and perturber densities are from 10(exp)11 cm(exp)-3 up to 10(exp)21 cm(exp)-3

Efficiency of final irrigation of root canal in removal of smear layer

Introduction A smear layer forms on the root canal walls as the consequence of root instrumentation. The smear layer formed in such a way considerably influences the quality of root obturation and endodontic treatment outcome. Objective The aim of this study was to ultrastructurally analyze the surface of intracanal dentine after removal of the smear layer by the solution of doxycycline, citric acid and detergent Tween-80 (MTAD). Methods The study involved 60 single-rooted, extracted, human teeth divided into four groups. All samples were instrumented by a step-back technique and manual K-files, and rinsed during instrumentation by 2% CHX and H2O2. The first group of samples was exclusively rinsed by CHX and H2O2; in the second group, besides using CHX and H2O2, MTAD solution was used for the final irrigation. The samples which were rinsed by distilled water (+ control) and the samples rinsed by 5.25% NaOCl and 17% Na EDTA (-control) served as control groups. All samples were observed under the scanning electronic microscope JEOL-JSM-5300. The coronary, middle and apex thirds of the radix region were analyzed. Results The obtained results of the SEM analysis showed that the application of 2% chlorhexidine and hydrogen peroxide did not give clear dentine walls, and the smear layer could not be removed completely. The application of the same combination (CHX and H2O2), added by the final MTAD irrigation solution, led to the efficient removal of the smear layer, while the morphological structure of dentine surface remained unchanged. Statistical analysis showed that canal walls in the experimental group with MTAD as the final irrigation were significantly clearer compared to the control group (p<0.001). Conclusion Based on the obtained results, it can be concluded that MTAD is an efficient solution for the final irrigation of the canal system

Serbian Virtual Observatory and Virtual Atomic and Molecular Data Center (VAMDC)

We review recent developments in Serbian Virtual Observatory (SerVO) as well as its relation with the European FP7 project: Virtual Atomic and Molecular DataCenter - VAMDC. Main components of SerVO are going to be the archive of photographic plates, database of Stark broadening parameters and stellar evolution database. Photographic plateswere obtained at Belgrade Observatory from 1936 to 1996. Data for Starkbroadening were obtained using semiclassical perturbation and modified semiempirical theories mainly in collaboration with Paris Observatory, and we are organizing them now in the STARK-B database, which will enter also in VAMDC, and will have a mirror site inSerVO. Serbian Virtual Observatory will containas well a mirror of Darthmouth Stellar evolution database with improvements and VO compatible outputs

The project of Serbian Virtual Observatory and data for stellar atmosphere modeling

International audienceWe review recent developments in Serbian Virtual Observatory (SerVO) as well as developments surrounding Virtual Atomic and Molecular Data Center. Main components of SerVO are going to be the archive of photographic plates, database of Stark broadening parameters and stellar evolution database. Photographic plates were obtained at Belgrade Observatory from 1936 to 1996. Data for Stark broadening were obtained using semiclassical perturbation and modified semiempirical theories. Stellar evolution database is a mirror of Darthmouth evolution database with improvement and VO compatible outputs