Observations of molecular clouds in metal-poor environments typically find that they have much higher star formation rates than one would expect based on their observed CO luminosities and the molecular gas masses that are inferred from them. This finding can be understood if one assumes that the conversion factor between CO luminosity and H2 mass is much larger in these low-metallicity systems...

We have carried out a radio-wavelength imaging survey of 45 bright-rimmed clouds (BRCs), using the Australia Telescope Compact Array to characterise the physical properties in their ionised boundary layers. We detected radio emission from a total of 25 clouds and using a combination of Digitised Sky Survey and mid-infrared MSX 8 μm images classified the emission into that associated with the io...

We have carried out a radio-wavelength imaging survey of 45 bright-rimmed clouds (BRCs), using the Australia Telescope Compact Array to characterise the physical properties in their ionised boundary layers. We detected radio emission from a total of 25 clouds and using a combination of Digitised Sky Survey and mid-infrared MSX 8µm images classified the emission into that associated with the ion...

An atmospheric radiation model is used to study the combined effects of ozone depletions/redistributions and particulate clouds on atmospheric heating/photolysis rates and ultraviolet radiation reaching the biosphere. Four types of particulate clouds prevalent in the summertime Arctic are considered: stratospheric aerosols, tropospheric aerosols (Arctic haze), cirrus clouds, and stratus clouds....

Cloud is one of the most important atmospheric effects in computer graphics applications, and there have been lots of research results on it. Although they have mainly focused on the modeling and rendering of more realistic clouds, nowadays flight simulation games or even full-scale flight simulators often need a quantity of visually plausible clouds rather than realistic ones. Furthermore, we ...

This paper proposes Service Clouds, a distributed infrastructure designed to facilitate rapid prototyping and deployment of autonomic communication services. The Service Clouds infrastructure combines dynamic software configuration methods with overlay network services in order to support both crosslayer and cross-platform cooperation. The Service Clouds architecture includes a collection of lo...

We present slitless spectra of the Narrow Line Region (NLR) in NGC 4151 from the Space Telescope Imaging Spectrograph (STIS) on HST, and investigate the kinematics and physical conditions of the emission line clouds in this region. Using medium resolution (∼ 0.5 ˚ A) slitless spectra at two roll angles and narrow band undispersed images, we have mapped the NLR velocity field from 1.2 kpc to wit...

Cloud Computing is transfiguring development of information technology industry by providing scalable services on a pay per use basis. Cloud hosts and consumers are tied with service level agreement (SLA). SLA provides description of services provided by the cloud host. A cloud host can serve to multiple consumers and this is called cloud computing multi tenant model. Though, cloud shows infini...

Context. The interstellar medium contains warm clouds that are embedded in a hot dilute gas produced by supernovae. Because both gas phases are in contact, an interface forms where mass and energy are exchanged. Whether heat conduction leads to evaporation of these clouds or whether condensation dominates has been analytically derived. Both phases behave differently dynamically so that their re...

As children, we lie in fields and stare at the clouds for hours, their form, the shapes they make, and the way they seem to play with the light in the sky are fascinating to us. However, despite of our early fascination with clouds, we know surprisingly little about clouds and cloud processes. This paper outlines a technique developed to look at the formation of ice in clouds as part of a large...