A fast and accurate technique for modelling and simulation of clock jitter in continuous-time sigma-delta (SD) modulators is introduced. In addition to its high speed compared to the traditional jitter simulation method, the proposed technique is still continuous-time based, which is more convenient than discrete-time based jitter modelling suggested in other publications. The mathematical prin...

Use of simulation for capacity analysis is an upcoming field in Biotech industry. This paper discusses an application of discrete event simulation in the multi-product and multi-resource Filling Freeze Drying facility of Bayer Corporation’s Berkeley site. The SIGMA simulation model was used to estimate the current and future throughput capacity by taking into account current operations and vari...

Thompson’s group F is the group of all increasing dyadic PL homeomorphisms of the closed unit interval. We compute Σm(F ) and Σm(F ;Z), the homotopical and homological Bieri-Neumann-Strebel-Renz invariants of F , and show that Σm(F ) = Σm(F ;Z). As an application, we show that, for every m, F has subgroups of type Fm−1 which are not of type FPm (thus certainly not of type Fm).

This paper presents a tutorial on delta-sigma fractional-N PLLs for frequency synthesis. The presentation assumes the reader has a working knowledge of integer-N PLLs. It builds on this knowledge by introducing the additional concepts required to understand ΔΣ fractional-N PLLs. After explaining the limitations of integerN PLLs with respect to tuning resolution, the paper introduces the delta-s...

A review on the current state of mode physics in classical pulsators is presented. Two, currently in use, time-dependent convection models are compared and their applications on mode stability are discussed with particular emphasis on the location of the Delta Scuti instability strip.

Six Sigma provides an effective mechanism to focus on customer requirements, through improvement of process quality. In the Global Engineering Development Center of Tata Consultancy Services (TCS – GEDC) at Chennai, India, Six Sigma projects are being carried out with the objective of improving on time delivery, product quality and in-process quality. This paper describes the application of the...

This paper examines educational components that influence the creation of mash-up designs in a Personalised Learning Environment (PLE). These educational components are linking widgets, small tools, to psychopedagogical information and competences of a learner. Taking these into account principles and rules for an adequate PLE mash-up can be identified and empirically studied. Finally an approa...

Mash-ups emerged through the web 2.0 to juxtapose several applications and use them together. The next step after juxtaposition is the composition of existing applications to build a new one. A solution of this being born need is the reuse of parts from formers applications. To perform this composition and reuse in an easy and comfortable way, we propose a tool based on several extensions of se...