A DIRECTOR OF A UNIVERSITY LffiRARY has many problems. Besides financial problems, he must decide how to build collections, what resources in the collections can best serve faculty and students, what kind of bibliographical control must be provided, how to cope with the growth of collections and building problems that ensue, how to make more effective public services, how to provide instruction...

This paper gives a compilation of physical mechanisms producing red-shifts of astronomical objects. Over sixty proposed mechanisms are listed here for the purpose of quantitative comparisons. These mechanisms may not individually account for all observations but are adapted to particular situations such as the solar limb redshift, the red-shift of quasars or the cosmological red-shift. However,...

Multiresolution transforms, including a wavelet transform, are applied to image visualization, image restoration, filtering and compression, and object detection. Variance stabilization is used, when appropriate, to cater for common astronomical image noise models. We discuss validation of such methods in the case of astronomical image processing. A range of examples illustrate the effectivenes...

We present a long range planning (LRP) system, the Spike Plan Window Scheduler, which has been in use for observations on the Hubble Space Telescope (HST) for the past four years and which is being adapted for the Space Infrared Telescope Facility (SIRTF) and Next Generation Space Telescope (NGST) orbiting astronomical observatories. Due to the relatively underconstrained nature of this domain,...

The astronomical data gathered by the extrinsic photoconductors on-board the ISO satellite were greatly affected by the high energy radiation environment in space. In addition so called transients with long time constants make automated pipeline processing of the data a challenge. ISOPHOT-S is the high sensitivity spectrometer of the ISOPHOT instrument, featuring two 64 element Si:Ga arrays for...

Large format ultraviolet image sensors have been and are actively being developed for a variety of space borne astronomy missions The detector which historically is one of the most problematic parts of any astronomical spacecraft plays a critical role in the overall capability of the instrument There are numerous detector systems with none being ideal for all applications This paper presents an...

Virtually all of our knowledge of astronomical objects was gained by observation of their light. We know how to make many kinds of detailed measurements on light, among them brightness, spectrum, polarization state, degree of coherence, and the shape of light-emitting regions. We also know a great deal about the mechanisms by which light can be produced in nature, and we can thus use any accura...

Photos have been commonly used in our society to convey information, and the associated contextual information (i.e., the capture time and location) is a key part of what a photo conveys. However, the contextual information can be easily tampered or falsely claimed by forgers to achieve malicious goals, e.g., creating fear among the general public or distorting public opinions. Thus, this paper...

Application functionality in business-to-business marketplaces today covers a smaller range of a company's overall procurement activities. Not every product or service can be acquired using catalogs, auctions or tenders. With the growing number of market transactions to be supported electronically, we expect a range of applications that will handle other forms of transactions. We hold that to a...