Routing Protocols for Lossy Wireless Networks

Tato práce zkoumá vhodnost a požadavky návrhu simulací pro simulátor NS-3 pro případ bezdrátových sítí používaných v měřící infrastruktuře společnosti Kamstrup. V práci je popsán simulátor NS-3 a je vytvořena základní implementace dvou protokolů. Wireless M-Bus jako příklad jednosměrného protokolu pro zařízení napájené z baterií. Simulace Wireless M-Bus je porovnána s daty naměřenými v reálném systému. NS-3 poskytuje flexibilní prostředí pro vývoj simulací různých síťových protokolů, včetně těch určených pro sítě inteligentních měřidel.This thesis investigates suitability and design constraints of the NS-3 Simulator for simulations of wireless protocols used by Kamstrup metering infrastructure. An overview of NS-3 Simulator is given and preliminary implementations of two protocols are created. Wireless M-Bus as an example of a one-way protocol for battery-powered devices. The simulation of Wireless M-Bus is compared with measurements obtained in a real deployment. NS-3 proves to be a flexible framework for developing simulations of various network protocols, including the ones used for smart metering.

Exchange Rate Fluctuations in the New Member States of the European Union

This paper assesses the role of exchange rates in moderating the impact of economic disturbances in the new member states of the European Union, and finds some evidence in favour of this proposition. Exchange rates are mostly driven by real (demand) shocks, whilst output by real supply shocks. Nominal shocks, which have no long-run impact on output, are nevertheless important in explaining exchange rate fluctuations implying that less exchange rate flexibility may indeed be warranted in the run- up to the adoption of the euro. We find that while interest rate shocks generally do not explain exchange rate fluctuations, credit shocks matter in certain cases and seem to have considerable impact on exchange rate developments (e.g., for Poland). The analysis also shows that based on the average responses of exchange rates to different shocks, the adoption of narrow bands inside ERM II may be risky.Exchange rate fluctuations, transmission economies, ERM II, EMU, structural VAR

Strategic implications of critical fixities under continuous technological change

Includes bibliographical references (p. 27-28)

Intra-daily dynamics of dollar-sterling exchange market

This report describes the results of an initial exercise to explore the stylized facts of the dynamic properties of exchange rates employing a behavioral finance framework and high-frequency, second-scale, data. It uses a heterogeneous agent model, where chartist and fundamentalist traders coexist, in order to offer insights on their intra-daily movements and responses, to different market states. We find significant variations between the variables used to describe the agent's behavior in daily scales and that of intra-daily scales. The evolutionary stability of the otherwise irrational chartist behavior is demonstrated

Stability of the equation of homomorphism and completeness of the underlying space

We prove that all assumptions of a Theorem of Forti and Schwaiger (cf. [G. L. Forti, J. Schwaiger, Stability of homomorphisms and completeness, C. R. Math. Rep. Acad. Sci. Canada 11 (1989), 215–220]) on the coherence of stability of the equation of homomorphism with the completeness of the space of values of all these homomorphisms, are essential. We give some generalizations of this theorem and certain examples of applications