We explore, through a simplified, semi-analytic model, the formation of dense clusters containing massive stars. The parent cloud spawning the cluster is represented as an isothermal sphere. This sphere is in near force balance between self-gravity and turbulent pressure. Self-gravity, mediated by turbulent dissipation, drives slow contraction of the cloud, eventually leading to a sharp central...

We explore, through a simplified, semianalytic model, the formation of dense clusters containing massive stars. The parent cloud spawning the cluster is represented as an isothermal sphere. This sphere is in nearYforce balance between self-gravity and turbulent pressure. Self-gravity, mediated by turbulent dissipation, drives slow contraction of the cloud, eventually leading to a sharp central ...

Performing one-dimensional hydrodynamical calculations coupled with nonequilibrium processes for hydrogen molecule formation, we pursue the thermal and dynamical evolution of filamentary primordial gas clouds and attempt to make an estimate on the mass of population III stars. The cloud evolution is computed from the central proton density nc ∼ 10 2−4 cm−3 up to ∼ 1013 cm−3. It is found that, a...

We want to thank the authors for responding to our paper and for apprising readers as to the effects of the new information technologies in Asian educational settings. We think Miyake has characterized our argument very accurately and succinctly. As she points out the equity issues we raise are exacerbated in Asia because the resources available through new technologies are mostly in English. B...

S Balasegaram, J M Watson, A M C Rose, A Charlett, A J Nunn, A Rushdy, J Leese, L P Ormerod, on behalf of the Public Health Laboratory Service/British Thoracic Society/Department of Health Collaborative Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

We compare the statistical properties of J=1→0 CO spectra observed in the Perseus Molecular Cloud with synthetic J=1→0 CO spectra, computed solving the non–LTE radiative transfer problem for a model cloud obtained as solutions of the three dimensional magneto–hydrodynamic (MHD) equations. The model cloud is a randomly forced super–Alfvénic and highly super–sonic turbulent isothermal flow. The p...

Rapid development of smart technologies enables use of cloud service for large-scale data storage. Remote access of original data as well as biometric data from cloud storage enhances several challenges. It is inevitable to prevent unauthorized access of data stored in cloud. Biometrics authentication is more efficient than the known traditional authentication mechanisms. Authentication is a ma...

Deep convective clouds (DCCs) play a crucial role in the general circulation, energy, and hydrological cycle of our climate system. Aerosol particles can influence DCCs by altering cloud properties, precipitation regimes, and radiation balance. Previous studies reported both invigoration and suppression of DCCs by aerosols, but few were concerned with the whole life cycle of DCC. By conducting ...

Moving University Administrative Systems to the Cloud has the potential to make “game changing” reductions in capital costs, improvements in flexibility, and increases in functionality. Such a wholesale move, however, may not be feasible. Cloud based services have to be standardised, offered to a broad user base, under contracts with limited longevity, and directly to end-users. Some administra...