- Introduction
- Part I: Mathematics, Informatics, and Didactics
- Part II: Physics of Plasmas and Ionized Media
- Part III: Physics (other branches)

Three parts of the Proceedings you are holding in your hands
are composed of the contributions which have been presented by
students and teachers during the 7^{th} Annual Conference
of Students (Week of Doctoral Students, WDS'98) which was held in
Prague, *Faculty of Mathematics and Physics, Charles
University *from June 9 to June 12, 1998. The international
meeting was divided into the different symposia in accordance
with their topics and consisted of both invited lectures of
professors and shorter contributions, which were presented as
oral contributions or posters by doctoral students. The total
number of lectures and posters was 170; 74 of them being
submitted for publication in the Proceedings. This number is
rather high and thus the Proceedings are divided into three
volumes. Part I presents the contribution on
Mathematics, Informatics and Didactics (25 contributions). The
contributions from the field of Physics of Plasmas and Ionized
Media are the main topic of Part II, (because
32 contributions have been submitted from this symposium). Part III consists of contributions from all
other symposia on Physics (17 contributions).

All contributions in these volumes have been refereed by one
experts. We would like *to thank all the referees* for
their fruitful comments, which will make these student articles
easier to read and more informative for the scientific community.
We gratefully acknowledge the help of M. Králíková in editing
the manuscripts.

The Proceedings from previous years were published as
preprints of Faculty of Mathematics and Physics but the present
Proceedings are an official publication of the **MATFYZPRESS**
company and they are internationally registered under the **ISBN
number.** I believe that this registration would make the
reference to the articles contained in the Proceedings easier.

Judge for yourself, dear reader, if our attempt to present the results, not only those of our students but also of many other colleagues from abroad, has been successful. In the same way, we leave to your opinion the assessment of the scientific level of the contributions. However, it should be noted here that the Proceedings contain the contributions of students who have just started their postgraduate study as well as contributions of students who are about to finish their degree. We could have ordered the contributions in accordance with this criterion but we chose to arrange the papers according to their topic for the sake of easier reference.

*Finally, I would like to express my thanks to all speakers
and other participants for helping us to keep a fruitful and
friendly atmosphere during the whole meeting and, last but not
least, to the Headquarters of our Faculty for their support which
allowed us not only to invite the foreign participants but also
to issue the present volumes of Proceedings. *

*Pleasant reading, Jana Šafránková *

**Preface and Introduction**- Nešetřil J.,
**Špičková P.**, Coloring of graphs with bounded girth,^{M4} **Crhák T.**, On homotopy in commutative algebra,^{M2}**Babilon R.**, Interesting properties of Penrose tilings,^{M4}**Resová E., Mueller J.**, Analysis of one factor model of ANOVA,^{M9}**Lešanská E.**, Comparison of the nonsensitiveness regions in measuring angles and distances,^{M9}**Juránek J.**, Hypothesis testing in the regular linear multivariate model without constraints,^{M9}**Franěk P.**, Recursive methods in time series analysis,^{M10}**Tichý P.**, BiCGStab and other hybrid BiCG methods,^{M11}**Kliková A.**, Adaptive methods for the Euler equations,^{M11}**Ženčák P.**, Quartic smoothing splines preserving convexity and monotonicity,^{M11}**Linhart A.**, Numerical solution of convection-diffusion problems of environmental protection,^{M11}**Koňák M.**, Price models of the assets under regulation,^{M13}**Kovářová M.**, The application of the central limit theorem in the regenerative model for the permanent health insurance,^{M13}**Unzeitigová V.**, A probabilistic model of IBNR reserves,^{M13}**Friesl M.**, Constant death-rate and credibility,^{M13}**Pešek P.**, Introduction into the theory of pattern recognition and trading strategy,^{M13}**Beran M.**, Computational power of BSP computers,^{I1}**Vestenicky V.**, Data replication in distributed systems,^{I2}**Vlach R.**, Query processing in distributed database systems,^{I2}- Haindl M.,
**Havlíček V.**, Colour texture modelling,^{I2} **Dvorský J.**, Word-based compression methods for text retrieval systems,^{I2}**Holub M.**, Some problems in text document retrieval systems,^{I2}**Nguyen Duy Hoa**, Component definition language for dynamic component updating,^{I2}**Špimr M., Kostner R.**, Empathic approach to cell modeling,^{I2}**Straňáková M.**, Ambiguity in Czech sentences, classification and searching for it,^{I3}

**Vandas M.**, Magnetic clouds in the solar wind,^{F2}**Hrabaň V.**, Holub P., Solar wind observation: Methodology, data processing,^{F2}**Kirpichev I.**, Fedorov A., Zastenker G., Determination of ion flow direction in the magnetosheath and cusp regions with the set of Faraday cups,^{F2}**Blecki J.**, Low frequency plasma waves and their role in the dynamics of the earth magnetosphere,^{F2}**Měrka J.**, Šafránková J., Němeček Z., The high-latitude observations of cusp-like plasma: Statistical study,^{F2}- Gotselyuk Yu.,
**Kuznetsov S. N.**, Sinyakov A. V., Belian D., Multisatellite observations of energetic particle peaks in outer magnetosphere,^{F2} **Bučík R.**, Kudela K., Bogomolov A. V., Myagkova L. N., Kuznetsov S. N., Ryumin S. P., Distribution of gamma ray fluxes at altitude 500 km: CORONAS-I data,^{F2}- Kuznetsov S. N.,
**Myagkova I. N.**, Anomalous fluxes of quasi-trapped electrons (>0.5 MeV) under the inner radiation belt,^{F2} - Gotselyuk Yu.,
**Kuznetsov S. N.**, Sinyakov A. V., Belian D., Changes of outer radiation belt structure during the magnetic storm of April 17, 1994,^{F2} **Bobík P.**, Kudela K., Storini M., Kaššovicová J., Access of cosmic rays to Lomnický štít and Rome NM stations,^{F2}**Mitková P.**, Trávníček P., The conversion from the internal data representation of ISDAT system to IDFS data format,^{I2}**Marek P.**, Mitková P., Paluch H., Trávníček P., Modular multi-database server storing data in different data formats,^{F2}**Schletti R.**, Signal and noise of isochronous time-of-flight mass spectrometer,^{F2}- Wurz P.,
**Froehlich T.**, Bruening K., Scheer J., Heiland W., Hertzberg E., Fuselier S., Formation of negative ions by scattering from a diamond (111) surface,^{F2} **Kalhofer S.**, Čermák I., Foerderer M., Čermáková I., Kraetschmer W., Emission spectroscopy of carbon molecules,^{F2}**Illemann J.**, Wellert S., Schlemmer S., Gerlich D., Non-destructive mass determination of single sub-micrometer sized particles,^{F2}**Žilavý P.**, Sternovský Z., Němeček Z., Šafránková J., Charging of small solid bodies by a middle energy electron beam,^{F2}**Ďuran I.**, Stoeckel J., Jakubka K., Current density fluctuations measured by miniature Rogowski coil on the CASTOR tokamak,^{F2}**Hron M.**, Stoeckel J., Kryška L., Statistical analysis of the plasma turbulence using a pin-plate probe,^{F2}**Rusz J.**, Langmuir probe diagnostics for magnetised low-temperature plasma,^{F2}**Kříž P.**, Optical diagnostic methods of the flowing plasma,^{F2}**Eliáš M.**, Janča J., Optical diagnostics of RF plasma during CN films deposition,^{F2}**Slavíček P.**, Kapička V., Brablec A., Střecha M., Diagnostics of RF discharge,^{F2}**Vaculík R.**, Brablec A., Kapička V., Equiintensities of RF plasma discharges,^{F2}**Videnovic I. R.**, Konjevic N., Kuraica M. M., Diagnostics of the glow discharge cathode region by the atomic emission spectroscopy,^{F2}**Hubička Z.**, Fendrych F., Šícha M., RF multi-plasma-jet system for deposition composite thin films,^{F2}**Češka Z.**, Janča J., Dvořák M., ECR plasma deposition of thin films,^{F2}**Mrázek L.**, Klein J.-P., Winter H., Studies of SEC by oxygen dication with Ar, He and simple molecules,^{F2}**Luca A.**, Schlemmer S., Gerlich D., Glosík J., (CO)_{n}^{+}cluster formation in a cold ion trap,^{F2}**Wisthaler A.**, Hansel A., Singer W., Schwarzmann M., Lindinger W., Energy dependence of the proton transfer system

H_{3}O^{+}+ CH_{2}O -> CH_{2}OH^{+}+ H_{2}O,^{F2}**Wisthaler A.**, Hansel A., Schwarzmann M., Lindinger W., Vibrational relaxation of HCN^{+}and DCN^{+}in collisions with He,^{F2}**Hansel A.**, Jordan A., Lindinger W., Proton-transfer-reactions: Applications for on-line monitoring of VOC at PPTV levels,^{F2}

### Part III: Physics

#### F-1, F-3, F-4, F-8, F-10 and F-11 Branches of Graduate Doctoral Studies

**Řezáč R.**, Hadrava P., Relativistic kinetic model of a multi-particle cloud,^{F1}**Pichl L.**, Quasiclassical search for nonadiabatic transition probability formulae,^{F1}**Čížek M.**, Long range forces and dynamics of collision complexes H^{-}_{2}and HCl^{-},^{F1}**Pravda V.**, Pravdová A., Uniformly accelerated sources in electromagnetism and gravity,^{F1}**Pravdová A.**, Gravitational radiation and symmetries,^{F1}**Valach J.**, Comparison of 60^{o}and faulted dipoles: Lattice statics study,^{F3}- Zhedanov A.,
**Malyuk O.**, Surface spin-flop transition in AFM superlattices,^{F3} **Mančal T.**, Pendular molecules in strong static and radiative fields,^{F4}**Chmelová K.**, Interaction of Ni(II) cation with adenine mononucleotides and their analogues,^{F4}**Lovčinský M.**, Dědic R., Benešová J., Pšenčík J., Štys D., Hála J., Low temperature spectroscopic study of protection mechanism in photosynthesis of Fe-limited cyanobacteria,^{F4}**Urbánková E.**, Jelokhani-Niaraki M., Ježek P., Tryptophans of brown fat mitochondrial uncoupling protein (UCP1),^{F4}**Dědic R.**, Lovčinský M., Pšenčík J., Vácha M., Vácha F., Hála J., Characterization of photosystem II reaction center containing 1 and 2 carotenoides by means of low temperature spectroscopy,^{F4}**Dufková D.**, The diagnostic of the PBL in ALADIN,^{F8}**Kopál M.**, The strength function in deformed nuclei,^{F10}- Kopál M.,
**Macková A.**, Collective aspects of nuclear dynamics,^{F10} **Entlicher M.**, Hrach R., Investigation of plasma-surface interaction by computer modelling,^{F11}**Boldyš J.**, Hrach R., Wavelets in thin film physics,^{F11}

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Last revised 02-Oct-1998.