Chen andWilliams[2]show how precomputedz-buffer hnagesfromdifferent fixedviewing positions canbe reprojected toproduceanimagefora new viewpoint. Hereimagesareprecomputedfortwigsand branchesatvariouslevelsinthehierarchical structure ofa tree,and adaptivelycombined,dependingon thepositionof thenew viewpoint.The precomputedimages containmultiplez levelstoavoidmissingpixelsinthereconstruction, subp...

This paper investigates model checking Object-Z classes via their translation to the input notation of the CSP model checker FDR. Such a translation must not only be concerned with preserving the semantics of the original specification, but also with how efficiently the resulting specification can be model checked. Hence, the paper investigates alternative translation schemes and compares how e...

OBJECTIVES To determine changes in height, weight, and BMI of extremely preterm (EPT; gestational age <28 completed weeks) survivors from birth to 18 years of age, compared with term controls. METHODS Birth, discharge, and follow-up at ages 2, 5, 8, and 18 years of consecutive EPT survivors and contemporaneous term controls born in 1991-1992 in Victoria, Australia. Weight, height, and BMI wer...

Active objects have their own thread of control and passive objects are controlled by others. In Object-Z, all objects are modelled as passive objects. Timed Communicating Object Z (TCOZ) extends the Object-Z notation with Timed CSP’s process and timing constructs. The blending of the concepts of object and non-terminating process leads to the notion of active object in TCOZ. This paper conside...

This paper presents a formal framework for modelling and analysing mobile systems. The framework comprises a collection of models of the dominant design paradigms which are readily extended to incorporate details of particular technologies, i.e., programming languages and their run-time support, and applications. The modelling language is Object-Z, an extension of the well-known Z specification...

In this article, we consider the uniqueness of the difference monomials $f^{n}(z)f(z+c)$. Suppose that $f(z)$ and $g(z)$ are transcendental meromorphic functions with finite order and $E_k(1, f^{n}(z)f(z+c))=E_k(1, g^{n}(z)g(z+c))$. Then we prove that if one of the following holds (i) $n geq 14$ and $kgeq 3$, (ii) $n geq 16$ and $k=2$, (iii) $n geq 22$ and $k=1$, then $f(z)equiv t_1g(z)$ or $f(...