The paper presents a survey of the concepts which are handled in the the FP5 IST-2001-34166 project called GEOPLEX which was launched in March 2002 by the European Commission. The paper is purely intented as an introduction to the special session of which it makes part of and as such does not mean to be a scientific contribution Copyright c ©2005 IFAC.

The Polar Ozone and Aerosol Measurement and Stratospheric Aerosol and Gas Experiment instruments both observed high numbers of polar stratospheric clouds (PSCs) in the polar region during the second SAGE Ozone Loss and Validation (SOLVE II) and Validation of INTERnational Satellites and Study of Ozone Loss (VINTERSOL) campaign, conducted during the 2002/2003 Northern Hemisphere winter. Between ...

The Effects of Lake Breezes On Weather (ELBOW) 2001 was conducted in southwestern Ontario during June to August of 2001. Its purpose was to study the role of lake breezes in triggering convection and, in particular, the strong convection which can result in hail, heavy rain and tornadoes. A mesoscale network was installed to supplement the regular surface network. On intensive observing days se...

The Match technique was used to determine chemically induced ozone loss inside the stratospheric vortex during the Arctic winter 2002/2003. From end of November 2002, which is the earliest start of a Match campaign ever, until end of March 2003 approximately 800 ozonesondes were launched from 34 stations in the Arctic and mid latitudes. Ozone loss rates were quantified from the beginning of Dec...

let $d=(v,a)$ be a finite simple directed graph. a function$f:vlongrightarrow {-1,0,1}$ is called a twin minus dominatingfunction (tmdf) if $f(n^-[v])ge 1$ and $f(n^+[v])ge 1$ for eachvertex $vin v$. the twin minus domination number of $d$ is$gamma_{-}^*(d)=min{w(f)mid f mbox{ is a tmdf of } d}$. inthis paper, we initiate the study of twin minus domination numbersin digraphs and present some lo...

Absract Magnetic actuation utilizes the mechanic torque that is the result of interaction of the current in a coil with an external magnetic field. A main obstacle is, however, that torques can only be produced perpendicular to the magnetic field. This actuation principle has been a topic of research since earliest satellites were launched. Magnetic control has been applied for nutation damping...

This work was proposed as a Doctoral Thesis of Applied Computing Course at Brazilian National Institute for Space Research (INPE) and is a ongoing work. The main purpose of SICSDA is to allow that satellites control can be done through the same set of machines, enabling the choice of which one of the satellites is desirable to be monitored in a determined piece of time. Another important fact i...