Motivation: The ability to extend a language with new syntactic forms is a powerful tool. A sufficiently flexible macro system allows programmers to build from a common base towards a language designed specifically for their problem domain. However, macro facilities that are integrated, capable, and at the same time simple enough to be widely used have been limited to the Lisp family of languag...

No-arbitrage macro-finance models use variance decompositions to gauge the extent of association between the macro variables and yields. We show that results generated by this approach are sensitive to the order of variables in the recursive identification scheme. In a four-factor model, one may obtain 18 different sets of answers out of 24 possible. We propose an alternative measure that is ba...

This paper presents and estimates a regime switching macro-…nance model of the term structure with latent and macroeconomic factors. The joint dynamics of the yield and macro factors are examined simultaneously. Both the canonical yields-only model and the macro-…nance model capture two regimes in the state equation that relate to a turbulent period and a tranquil period. Statistically, the for...

Heterochromatin is defined classically by condensation throughout the cell cycle, replication in late S phase and gene inactivity. Facultative heterochromatin is of particular interest, because its formation is developmentally regulated as a result of cellular differentiation. The most extensive example of facultative heterochromatin is the mammalian inactive X chromosome (Xi). A variety of his...

Computer C ombining hardware components with an executable specification language facilitates the specification prototyping of embedded distributed systems. The specification language should cover process management, timing, and communication commands that real-time executive and communication task services of every node prototype can interpret. We use a technique that employs attribute grammar...

Executive Summary A series of experiments were performed in a small but full-scale CDS device to determine its ability to remove free oil and grease from polluted waters using sorbents. Nine experiments were performed using five different sorbents. One control experiment was performed without a sorbent. The sorbents were allowed to float on the surface of the separation chamber of the CDS devic...

Introduction: Tinea capitis is common among schoolchildren in developing countries but underreported in Madagascar. We report the occurrence of an outbreak of gray patch tinea capitis due to Microsporum langeronii in a public primary school of Antananarivo, the capital city of Madagascar. Methodology: Forty-two children were included, 27 (64%) of them presenting with tinea capitis and 32 (76%) ...

A language FOBS-X (Extensible FOBS) is described. This language is an interpreted language, intended as a universal scripting language. An interesting feature of the language is its ability to be extended, allowing it to be adapted to new scripting environments. The interpretation process is structured as a core-language parser back-end, and a macro processor front-end. The macro processor allo...

Data abstractions have been proposed as a mean,, to enhance program modularity. The implementation of such ne~ features to an existing language is typically handled bx either rewriting large portions of an existing compiler or by using a preprocessor 1o translate the extensions into the standard language. The first technique is expensixe to implement while the latter is usuall 3 slov, and clums...