In multivariable calculus the derivative is most naturally defined by a characterizing property. Indeed, the one-variable difference-quotient is no longer meaningful. Although computing the matrix of partial derivatives is a matter of one-variable technique, proofs of the derivative properties should be intrinsic and based on the definition. Especially, because the chain rule is so important bu...

Meeting Prof. Oldeman is a memorable experience. I remember well his entries in the lecture hall. A towering figure appears, clad in a green cape, his posture a striking blend of Sandeman and Zorro. So I had met with Prof. Oldeman: a lucid, multilingual, well-spoken gentleman, who travels all continents and boasts a wide range of interests that includes his students. These were the beginnings o...

in such a way as to test the hypothesis; the observations gained from the experiment are incorporated in a new hypothesis. Bernard recognized that the success or failure of the procedure was in great part dependent upon the attitude of the investigator and demanded open-mindedness, doubt, and unprejudiced observation. Today we recognize that investigation of the properties of living material ca...

This paper presents an object-oriented implementation of Lucid. We implement each variable in a Lucid program as a class. An object of the class is the variable in a context. An object evaluates itself when it receives a demand for its value and stores the value. Evaluation of a program involves object self-evaluations and message passing of demands among objects. Some optimization issues are a...

ond chapter is a clinical dissertation on Cushing's syndrome, combining basic and clinical science in a succinct and comprehensive marriage. Other outstanding articles within this book are the discussions of inhibin in Debeljuk and Rettori's chapter on gonadal hormones and gonadotropin secretion and the opioid regulation of pituitary secretion by Frantz et al., with a lucid explanation of the r...

Certainly one of the most thoroughly discussed and popular subjects in American sport history is the story of Jackie Robinson and the integration of organized baseball. Few topics elicit such a responsive chord or stir people’s emotions more than the Robinson saga. It is a tale of courage and heroics, both on the part of Robinson and Branch Rickey, the “Mahatma” or “Deacon” of the national game...

In this work we model the ACME (a fictitious company name) “printer case incident” and make its specification in Forensic Lucid, a Lucidand intensional-logic-based programming language for cyberforensic analysis and event reconstruction specification. The printer case involves a dispute between two parties that was previously solved using the finite-state automata (FSA) approach, and is now re-...