The history of research on the development of program-families is briefly reviewed. Two distinct problems, configuration-management and family-design are identified. It is explained that, while software configuration-management is not fundamentally different from configurationmanagement for other products, in practice, inadequate attention to family-design exacerbates all problems associated wi...

This paper is motivated by a desire to create a user friendly, technically flexible approach to cryptography. This approach can create a flexible design pattern that is useable under a wide variety of circumstances from broadcast media to existing network protocols. This is accomplished by designing a new, key piece of infrastructure used for cryptography key lookup. Once the key is obtained th...

This paper presents a segregated algorithm to solve numerically the superfluid helium (He II) equations using the two-fluid model. In order to validate the resulting code and illustrate its potential, different simulations have been performed. First, the flow through a capillary filled with He II with a heated area on one side is simulated and results are compared to analytical solutions in bot...

Heat transfer during flow boiling in minichannels and microchannels is intimately linked to the liquid-vapor phase distribution in the channels. The vapor phase exists as nucleating bubbles, dispersed bubbles, elongated bubbles, an annular core, or all vapor flow completely filling the channel. Similarly, the liquid can exist as bulk liquid, slugs, thin film on the heated wall, or dispersed dro...

Eye-position signals (EPS) are found throughout the primate visual system and are thought to provide a mechanism for representing spatial locations in a manner that is robust to changes in eye position. It remains unknown, however, whether cortical EPS (also known as "gain fields") have the necessary spatial and temporal characteristics to fulfill their purported computational roles. To quantif...

Chemicals and thermal treatments Two types of commercial anatase TiO2 with a specific surface area of 300 m2 g-1 and 95 m2 g-1were used as-received from Sachtleben Chemie (Duisburg, Germany). Annealing was carried out in a horizontal furnace equipped with a quartz tube reactor. Typically, the TiO2 powder sample (1 g) was heated in a quartz boat at a temperature gradient of 10 oC min-1 till reac...

An electric-current-assisted method was used to mineralize dense hydrogels and create hydroxyapatite/hydrogel composites with unique hierarchical structures. The microstructure of the final material can be controlled by the mineralization technique and the chemistry of the organic matrix. A hydroxyapatite/hydrogel composite was obtained with a large inorganic content (approximately 60% of the w...

We have developed an aerial mercury monitoring system whose operating principle is based upon gold amalgamation and flameless atomic absorption. A stable measurement of micro-trace mercury in the air becomes possible by preventing dirt from accumulating in the measuring system and minimizing interference from other gases occupying the same area. As a mercury collecting agent, a Chromosorb P coa...

Introduction. Characterization of useable planetary materials will require high sampling throughput. Although remote observations from orbiting spacecraft provide spatially wide coverage, they do not, by themselves, provide sufficient information for materials utilization purposes. On the other hand, active rover-based in-situ analyses can provide detailed geological information but can be very...