... Variations in water level along coastlines can be used to drive turbines technology is the same as low-head hydro power . ... Tidal facility produces about 1/3 the electrical energy of a hydro facility of the same peak capacity . Two tidal plants in the world: . ... Bottom Line: There aren't many favorable sites in the world for tidal power and the estimated capacity is 50 times smaller than the world's hydroelectric power capacity. ... Previous Lecture Next Lecture Course Page ...

... Future seminars . P a s t seminars . ... Stochastic resonance and synchronization in a multistable system " . A.S. Kovaleva (IKI) . ... For a class of multistable systems excited by a periodic signal and noise, the improvement of the output signal-to noise ratio (SNR) can be achieved by the apparently paradoxical means of increasing the input noise intensity. ... We determine stochastic resonance and synchronization conditions in a bistable system subject to a weak periodic signal and noise . ...

Circling around magnetic field lines. ... The ring current . Because positive ions and negative electrons drift in opposite directions (see drawing), that motion will create an electric current that circulates clockwise around the Earth when viewed from north. ... How then can the radiation belt and ring current arise? ... Electric fields are able to push trapped particles earthward, and unlike the purely magnetic motion described earlier, an electric field can also energize them. ...

and 42 % 27-11-1999 Andr\'as Holl % 2.31: 02-05-2001 % % Konkoly Observatory, Budapest, Hungary % Use the following documentstyle definition : % \documentstyle[twoside, ibvs2, epsf]{article} % or % \documentstyle[twoside]{article} % \input ibvs2.sty % \input epsf.sty % epsf is only needed for figures % IBVS.STY screen message \ typeout {} \ typeout {IBVS.STY Ver. 2.31 - 02-05-2001 } \ typeout {Information Bulletin on Variable Stars - Konkoly Observatory} \ ...

... Once "point" is read, assumes all the following x,y coordinates are points. ... Program asc2dxf c reads set of x,y coordinates and writes a .dxf file for aperture plate. character*4 xop1,xop2 character*12 outfile 1 format ( 1h0 /7hSECTION/1h2/8hENTITIES/ 1h0 ) 2 format (6hCIRCLE/1h8/1h1/2h62/1h3) 3 format (4hLINE/1h8/1h1/2h62/1h3) 4 format (5hPOINT/1h8/1h1/2h62/1h3) 5 format (2h10/5h43.00/2h20/5h43.00/2h30/5h0.000/2h40/5h43.00/ 1h0 ) 6 format (2h10,/,f6.3,/,2h20,/,f6.3,/,2h30/5h0.000) 7 ...

... The described algorithm is suitable for measurements of complex images of stars. ... a) the zero-based number of stars in the complex (multicentric) image, . b) set of preliminary coordinates - x i , y i , for all stars, index i is number of a star, . ... i - index of a star in the complex image; . ... These parameters are calculated by a nonlinear method of a least squares.The main output parameters of this algorithm are x i , y i ; where the index i is number of a star in the multicentric image. ...