Throughout the years, the performance of the FFRs has been the topic of extensive studies, resulting mainly in the characterization of aerosol penetration through filters using aerosols that are thought to be similar to those encountered in workplaces. There are limited number of studies in the literature reporting CE-marked respirator performance, and there is a need to perform a penetration e...

We have obtained BV I CCD imaging of Berkeley 17, an anticentre open cluster that competes with NGC 6791 as the oldest known open cluster. Using the synthetic colour magnitude diagrams (CMD) technique with three sets of evolutionary tracks we have determined that its age is 8.5 9.0 Gyr, it distance modulus is (m−M)0= 12.2, with a reddening of E(B−V ) = 0.62 0.60. Differential reddening, if pres...

We investigate current problems in obtaining reliable ages for old stellar systems based on stellar population synthesis modelling of their integrated spectra. In particular, we address the large ages derived for the globular cluster 47 Tuc, which is at odds with its Color-Magnitude-Diagram (CMD) age. Using a new age indicator, Hγσ<130, which is particularly effective at breaking the degeneracy...

We have implemented the Centroid Molecular Dynamics scheme (CMD) into the Grand Canonical-like version of the Adaptive Resolution SimulationMolecular Dynamics (GC-AdResS) method. We have tested the implementation on twodifferent systems, liquid parahydrogen at extreme thermodynamic conditions and liquid water at ambient conditions; the reproduction of structural as well as dynamical results of ...

epidemiology is the study of disease distribution and factors determining or affecting it. likewise, endodontic epidemiology can be defined as the science of studying the distribution pattern and determinants of pulp and periapical diseases; specially apical periodontitis. although different study designs have been used in endodontics, researchers must pay more attention to study designs with h...