We present INTEGRAL and XMM-Newton observations of the prompt γ-ray emission and the X–ray afterglow of GRB 030227 , the first GRB for which the quick localization obtained with the INTEGRAL Burst Alert System (IBAS) has led to the discovery of X–ray and optical afterglows. GRB 030227 had a duration of about 20 s and a peak flux of ∼1.1 photons cm −2 s −1 in the 20-200 keV energy range. The tim...

In this paper, a set of transformations is defined on to. Some basic and naïve mathematical structure of is introduced. The concept of discrete dynamical systems through IVT and some further research scope of IVTs are highlighted. and 4]. A class of discrete transformations on named as Integral Value Transformations (IVT), corresponding to each of those CA rules, is introduced in the formation ...

Several distinctive, and initially puzzling features of Nikophon's law on silver coinage (Rhodes/Osborne 25) become clear in light of the Athenian state's attempt to drive down transaction costs in order to maintain Athenian public revenues and private profits in the post-imperial era. I suggest that the law was explicitly intended to even the playing field of trade by ensuring non-citizens acc...

To assess the potential impact of using hafnium as absorber material in LWRs high temperature accidental situations, oxidation behavior was studied up to 1400°C, i.e. at conditions relevant severe accidents. Different sample geometries were tested and oxidized steam/argon mixtures, either a furnace or thermogravimetric analyzer. Metallographic examinations, hydrogen measurements EPMA oxygen pro...

A model for the Reynolds-number dependence of the dimensionless dissipation rate C(ɛ) was derived from the dimensionless Kármán-Howarth equation, resulting in C(ɛ)=C(ɛ,∞)+C/R(L)+O(1/R(L)(2)), where R(L) is the integral scale Reynolds number. The coefficients C and C(ɛ,∞) arise from asymptotic expansions of the dimensionless second- and third-order structure functions. This theoretical work was ...

On 2003 September 17 INTEGRAL discovered a bright transient source 3◦ from the Galactic Center, IGRJ17544−2619. The field containing the transient was observed by XMM-Newton on 2003 March 17 and September 11 and 17. A bright source, at a position consistent with the INTEGRAL location, was detected by the European Photon Imaging Camera (EPIC) during both September observations with mean 0.5–10 k...

The paper considers the dynamic positioning problem for a ship having only two independent controls, namely surge force and yaw moment. A time-varying feedback control law including integral action is developed and proved to exponentially stabilize both the North and East positions and the orientation of the ship. Experimental results are presented where the controller is implemented on a model...