Message Sequence Chart (MSC) speci cations have found their way into many software engineering methodologies and CASE tools, in particular in the area of telecommunications and concurrent real-time systems. MSC Speci cations often represent early life-cycle requirements and high-level design speci cations. We are considering iterating and branching MSC speci cations according to ITU-T Recommend...

In the late eighties and early nineties, three major exciting new developments (and some rami cations) in the computation of minimum capacity cuts occurred and these developments motivated us to evaluate the old and new methods experimentally. We provide a brief overview of the most important algorithms for the minimum capacity cut problem and compare these methods both on problem instances fro...

A number of biological responses to angiotensin II have been demonstrated to be modulated acutely by cations, but the exact mechanism has not been elucidated. We have utilized a radioreceptor assay for angiotensin II to determine whether this acute regulatory mechanism could be related to a change in either number or affinity of angiotensin II binding to receptors. Three target tissues were use...

The title chiral quaternary ammonium salt, C(13)H(25)N(4) (+)·I(-), was synthesized through the Menschutkin reaction between the cage aminal (2S,7S)-1,8,10,12-tetra-aza-tetra-cyclo-[8.3.1.1(8,12).0(2,7)]penta-decane and ethyl iodide. The quaternization occurred regioselectively on the nitrogen with major sp3 character. The crystal structure consists of anions and cations separated by normal dis...

brane uptake of IFB, were completely reversible. These findings are consistent with the concept that the formation of calcium salt bridges is essential for attachment of IFB,2 to the ileal-absorptive surface.

A proton NMR method for the drtermination of salvation numbers of alkaline earth cations with hexamethyl phosphoramide (HMPA) in nitromethane (NM) as diluents is described. The method is based on monitoring the resonance frequency of HMPA protons as a function of HMPA / metal ion molar ratio at constant metalion concentration. The average salvation number of cations,  , at any HMPA / metal ...

Enzymes activated by monovalent cations are abundantly represented in plants and the animal world. They have evolved to exploit Na+ and K+, readily available in biological environments, as major driving forces for substrate binding and catalysis. Recent progress in the structural biology of such enzymes has answered long standing questions about the molecular mechanism of activation and the ori...

Within the Feynman Vernon path integral formalism and in the Markovian limit we consider the time evolution of a collective subsystem coupled to a bath of intrinsic degrees of freedom We show that dissipation leads to major qualitative and quantitative modi cations of the time evolution of the density matrix of the collective subsystem In either the spatial momentumor energy representation the ...

This paper discusses the relationships between HDL's and design management services commonly found in EDA environments and frameworks. By using VHDL as a case study, it is demonstrated that HDL's are not neutral with regard to these services. The paper shows that the exibility in using a language together with the widest possible range of design management mechanisms should be a major language ...

We describe the qualitative and quantitative analysis of the complexation properties towards cations of a cyclic peptoid hexamer composed of alternating α- and β-peptoid monomers, which bear exclusively chiral (S)-phenylethyl side chains (spe) that have no noticeable chelating properties. The binding of a series of monovalent and divalent cations was assessed by 1H NMR, circular dichroism, fluo...