Constraint imperative programming languages combine declarative constraints and imperative language features into an integrated programming language. The language Turtle supports these programming paradigms and additionally integrates functional programming with higher-order functions and algebraic data types. This paper describes the implementation of Turtle, consisting of a compiler, a run-ti...

121 COVER Skeletons of turtle, chicken, and mouse. The turtle body plan is unusual in that the ribs are transformed into a carapace, and the scapula, situated outside the ribs in other animals, is found inside the carapace. A report on page 193 explains the evolutionary origin of this inside-out skeletal morphology.

This article introduces the turtle++ library which combines constraint-based and imperative paradigms and enables in this way constraint imperative programming (CIP) with c++. Integrating CIP into c++ allows to exploit the powerful expressiveness of the CIP paradigm within a language widely used and accepted in practice. We discuss the main concepts and implementation and illustrate programming...

We discuss the nonabelian world-volume action which governs the dynamics of N coincident Dp-branes. In this theory, the branes’ transverse displacements are described by matrix-valued scalar fields, and so this is a natural physical framework for the appearance of noncommutative geometry. One example is the dielectric effect by which Dp-branes may be polarized into a noncommutative geometry by ...

The intense exploitation of turtles in Asian markets has contributed to declines in turtle populations across the continent. Threequarters of Asia’s turtles are threatened and half are endangered. A recent workshop on the Asian turtle crisis identified taxonomic studies of widespread species as a priority for research because these low risk species may include unrecognized, narrowly distributed...

Loggerhead turtles are vulnerable to natural and anthropogenic environmental pressures due to their longevity, global distribution, and their migratory way of life. Two significant environmental conditions, temperature and available food, have been correlated to growth, reproduction, and maturation of loggerhead turtles, often accounting for most of the observed variability. With the current an...

This paper explores the impact of demographic changes on the housing market in the US, 1st by reviewing the facts about the Baby Boom, 2nd by linking age and housing demand using census data for 1970 and 1980, 3rd by computing the effect of demand on price of housing and on the quantity of residential capital, and last by constructing a theoretical model to plot the predictability of the jump i...

Painted turtles (Chrysemys picta) have a natural history unlike that of other chelonians from the northern United States and southern Canada. Although neonates of other freshwater turtles usually emerge from their subterranean nests in late summer or autumn and move to nearby marshes, lakes, or streams to spend their first winter, hatchling painted turtles typically remain inside their shallow ...

During the reproductive season, sea turtles use a restricted area in the vicinity of their nesting beaches, making them vulnerable to predation. At Raine Island (Australia), the highest density green turtle Chelonia mydas rookery in the world, tiger sharks Galeocerdo cuvier have been observed to feed on green turtles, and it has been suggested that they may specialise on such air-breathing prey...