Roadheaders are one of the most popular mechanized excavators used in mining and civil underground construction. These machines are primarily used in soft to medium hard rocks. This paper reviews the parameters associated with the application and operation of roadheaders and presents a method for estimating cutting performance.

Speciication languages are best used in environments that provide eeective theorem proving. Having such support available, it is feasible to contemplate forms of typechecking that can use the services of a theorem prover. This allows interesting extensions to the type systems provided for speciication languages. I describe one such extension called \predicate subtyping" and illustrate its utili...

We show that an analogue of the domain-theoretic least fixpoint operator can be defined in a purely set-theoretic framework. It can be formalized in classical higher order logic, serving as a solid foundation for proving termination of (possibly nested) recursive programs in a variety of mechanized proof systems.

We present some of the experiments we have performed to best test our design for a library for MathScheme, the mechanized mathematics software system we are building. We wish for our library design to use and reflect, as much as possible, the mathematical structure present in the objects which populate the library.

Some History • Earliest methods were manual – throwing dice, dealing cards, drawing balls from an urn • Mechanized devices in early 1900’s • Later, methods based on electric circuits • Many other schemes based on phone books, π etc. • Advent of computing led to interest in numerical and arithmetic methods – such methods generate numbers sequentially and are easily programmed – the most commonly...

I evaluated homogeneous enzyme immunoassay (EMIT) of serum thyroxine with the Gilford 3500 analyzer. The samples are pretreated before quantitation on the Gilford 3500; the procedure thereafter is entirely mechanized. Forty-four samples may be analyzed per run. Precision and accuracy are good, and results correlate well with those by radioimmunoassay.

Currant is a technological, fast-growing, high-yielding crop with high content of vitamins in the fruit. The intensification production provides for an increase productivity plantings and reduction cost due to introduction new cultivation technologies. main expenses are connected harvest. authors this paper present first modern berry harvesters that reduce ensure automated labor. prospect using...

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We conjecture that many design patterns are consistency-preserving program transformations that can be mechanized. We also conjecture that such patterns can be related to the ADAGE method of layered software system construction. The benefits of a unification would place ADAGE at the forefront of a number of important research areas in software design and implementation.