Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, United Kingdom (L.H., M.M., A.M., M.A., J.E.G.); Department of Animal and Plant Sciences, University of Sheffield, Sheffield S3 7HF, United Kingdom (S.A., A.B., A.J.F.); Centre for Integrative Plant Biology, University of Nottingham, Nottingham LE12 5RD, United Kingdom (K.S., T.D., R.S.); and Departme...

Spatial models are often based on polygons both in 2D and 3D. Many Geo-ICT products support spatial data types, such as the polygon, based on the OpenGIS ‘Simple Features Specification’. OpenGIS and ISO have agreed to harmonize their specifications and standards. In this paper we discuss the relevant aspects related to polygons in these standards and compare several implementations. A quite exh...

\Everything should be made as simple as possible, but not simpler." A. Einstein, Autobiographical Notes 3] When there are several diierent hypotheses that can explain an observed phenomenon, which of these hypotheses should we choose? Occam, a well known 13th century philosopher, was the rst to formulate a natural idea: choose the simplest of these hypotheses. This principle has been successful...

SHAMAN is a framework for hierarchical management of networks with SNMP that provides flexible and dynamic network management by permitting distribution of control and management functions over a hierarchical management structure. We have implemented a prototype software package that contains a SHAMAN Intermediate Manager (IM), a GUI for controlling the IM and for developing applications for it...

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A simple, sensitive and selective spectrophotometric method for the assessment of carbofuran in various formulations and in environmental water samples is described. The method is based on the coupling of hydrolyzed carbofuran with diazotized dapsone in alkaline medium at 0 – 4° C which gives orange red colored product having the absorption maximum at 480 nm. The product is stable for 48 h. Bee...

ABO3 perovskites with small cations at the A site (A = Sc(3+), In(3+) and Mn(2+) and B = Al(3+) and transition metals) are reviewed. They extend the corresponding families of perovskites with A(3+) = Y, La-Lu, and Bi and A(2+) = Cd, Ca, Sr and Ba and exhibit the largest structural distortions. As a result of these large distortions, they show, in many cases, distinct structural and magnetic pro...

A new bilingual speciication environment consisting of the two languages SDL and S/R is described. The new design is based on the SDL-to-S/R compiler that was implemented at a previous phase and introduces the necessary interface semantics as restrictions on special SDL shell processes that encapsulate the interfaced S/R modules. The environment can be used in SW/HW co-design by involving the v...

A canonical branched covering over each sufficiently good simplicial complex is constructed. Its structure depends on the combinatorial type of the complex. In this way, each closed orientable 3-manifold arises as a branched covering over S3 from some triangulation of S3. This result is related to a theorem of Hilden [9] and Montesinos [16]. The branched coverings introduced admit a rich theory...