We present near-infrared imaging of a sample of 57 relatively large, Northern spiral galaxies with low inclination. After describing the selection criteria and some of the basic properties of the sample, we give a detailed description of the data collection and reduction procedures. The Ks λ = 2.2μm images cover most of the disk for all galaxies, with a field of view of at least 4.2 arcmin. The...

The view of a complex real-time computer-based application system as one in which not only automated machine components are embedded but also human servers, especially those who pe fo rm time-sensitive tasks in close interaction with machine components, are "embedded" as components, is adopted. Efforts for optimal scheduling of executing components can then be applied not only to the machine co...

Saving power is a fundamentally important goal in mobile devices where battery life limits the utility of such devices. Much research has been done in trying to develop schemes for saving power and extending battery life by turning off components of the device when they are not needed to save power. Choosing when to turn off the devices often requires a system to have the ability to predict whe...

ÐThis paper introduces DISK, a distributed Java Virtual Machine for networks of heterogenous workstations. Several research issues are addressed. A novelty of the system is its object-based, multiple-writer memory consistency protocol (OMW). The correctness of the protocol and its Java compliance is demonstrated by comparing the nonoperational definitions of Release Consistency, the consistency...

A useful definition of “big data” is data that is too big to comfortably process on a single machine, either because of processor, memory, or disk bottlenecks. Graphics processing units can alleviate the processor bottleneck, but memory or disk bottlenecks can only be eliminated by splitting data across multiple machines. Communication between large numbers of machines is expensive (regardless ...