
      *** README.TXT, Phys Inst. TU Budapest, March 28, 1990 ***


      Ŀ
                                                        
                 TEDDY - A Kinetic Gas Model            
                                                        
                Shareware DEMO ver.2.0, 1990            
                                                        
          Gy. Herndi, D. Plmai, P. Pacher, G. Mrk    
        Physical Institute of the Technical University  
            H-1111 Budapest, Budafoki u.8. Hungary      
                                                        
      


                          Ŀ
                             About TEDDY   
                          

         TEDDY  (short  for  ThermoDynamics)  is  an  ideal  gas model
    simulator based on molecular dynamics.  The simulated objects  are
    particles  confined  to  a  two  dimensional  container made up of
    various types  of walls.   The particles  playing the  role of gas
    molecules  collide  elastically  with  each  other.  The different
    interactions modelled  by the  different walls  are represented by
    the corresponding rules for collision against the walls.

         The program is useful as  a visual aid and experimental  tool
    in various  levels of  education.  Includes  the following topics:
    molecular   motion,   temperature,   first   and   second  laws of
    thermodynamics,   speed   distribution,   fluctuations,   molecule
    formation, relaxation phenomena.

         The  program  displays  the  moving  particles  confined to a
    rectangular vessel and two on-line diagrams simultaneously.  There
    are three types of particles: red, green and invisible ones.   The
    particle number and the mass  of each particle type can  be chosen
    independently.  There can be maximum 999 particles.

         The  on-line  diagrams  can  show  a  variety of distribution
    functions (e.g.  pressure, density,  temperature versus  position,
    velocity   and   energy)   or   time-evolution   functions   (e.g.
    temperature, entropy).  Time  averaged distribution functions  may
    be displayed, as well.

         You  can  design  your  own  experiments  (container size and
    shape; type, number,  mass, initial velocity  and location of  the
    particles; type of the diagrams, etc) with a powerful menu  system
    and save them on disk for later use.


                         Ŀ
                            About TEDDY DEMO   
                         

         TEDDY DEMO contains all  features of the full  product except
    the menu system.  So you can only use the experiments pre-prepared
    and saved to disk  by the full TEDDY  program.  Find in the  TEDDY
    DEMO diskette  some interesting  experiments (*.MIC  files), these
    experiments are intended to demonstrate the capabilities of TEDDY.
    However,  TEDDY  DEMO  alone   is  a  useful  aid   for  classroom
    demonstrations.


                     Ŀ
                        Configuration required   
                     

        * IBM XT/AT or compatible computer
        * 8087/80x87 coprocessor is recommended
        * at least 320 kbyte main memory
        * hard disk recommended
        * CGA, EGA, VGA or Hercules Graphics Card
        * DOS 3.1 or higher
        * GRAFTABL.COM (DOS utility)
        * for Hercules the MSHERC.COM (Microsoft C utility) or
          a CGA emulator program
        * MORE.COM (DOS utility)


                     Ŀ
                        Hard disc installation   
                     

         If  you  have  a  hard  disc  (or RAM disc) installed in your
    system you should copy TEDDY DEMO there to get faster operation.

         Simply create a new directory on your hard disc and copy  the
    contents of the TEDDY DEMO disc into this directory, i.e.  perform
    the following steps:

            C:
            CD \
            MD TEDDEMO
            CD TEDDEMO
            COPY A:\*.*


             Ŀ
                Configure your system for TEDDY DEMO   
             

         TEDDY DEMO needs the GRAFTABL.COM and MORE.COM  DOS utilities
    in the DOS path.

         If you don't know whether these utilities are in your current
    DOS path or not, perform the following steps:

         1. Type the command:

            GRAFTABL

         If  the  system  answers  "Bad  command  or  file  name", the
    GRAFTABL.COM utility is NOT in your current DOS path.

         2. Type:

            MORE <NUL

         If  the  system  answers  "Bad  command  or  file  name", the
    MORE.COM utility is NOT in your current DOS path.

         If one or both  of the two required  DOS utilities is not  in
    the  path,  you  should  modify  the  path.   (Consult  your   DOS
    guidebook.)

         If you intend to run  TEDDY DEMO on a Hercules  Graphics Card
    do one of the following:

        * Before  starting  TEDDY DEMO  load the  MSHERC.COM  program.
          This  is  a  TSR  (Terminate  and  Stay  Resident)   utility
          distributed  as  a  part of the  Microsoft  C  5.1  software
          package.

    or

        * Before starting  TEDDY DEMO  load a  CGA  emulator  program.
          There are a variety of such products in the market.


                       Ŀ
                          Running TEDDY DEMO   
                       

         Enter  the  disc/directory  where  TEDDY  DEMO is located and
    type:

           TEDDEMO

         This offers you a list of the prepared experiments.  You  can
    then run the selected experiment by pressing its label (A-H),  get
    a short help  about the experiment  by pressing X  followed by the
    experiment label or quit to DOS with the Q key.


                 Ŀ
                    Contents of the TEDDY DEMO disc   
                 

        TEDDEMO .BAT  - TEDDY DEMO start batch file
        ENGLISH .BAT  - auxiliary batch file for TEDDEMO.BAT
        EXLST   .TXT  - menu text for TEDDEMO.BAT
        TDEM    .EXE  - TEDDY DEMO program
        TEDDY   .PIC  - title page for TEDDY DEMO program
        ENGLISH .LNG  - messages for TEDDY DEMO program
        *       .MIC  - pre-prepared experiments
        *       .MID  - description of the pre-prepared experiments
        ENGLISH .MIH  - help file for the TEDDY program
        SKALSKY .TEX  - a conference paper about TEDDY and
                        some of our other educational programs
                        Contains a number of references.
        README  .TXT  - this description file
        CHOOSE  .COM  - TEDDEMO.BAT reads the user input
                        using this utility


                           Ŀ
                              Copyright   
                           

       TEDDY - A Kinetic Gas Model, Shareware DEMO ver 2.0, 1990
              Gy. Herndi, D. Plmai, P. Pacher, G. Mrk
            Physical Institute of the Technical University
                H-1111 Budapest, Budafoki u.8. Hungary

         You are encouraged to use, copy and distribute TEDDY DEMO  for
    noncommercial use if it is not modified in any way.

         If you have any questions  or comments about TEDDY or  want a
    list of  our other  educational software,  write to  G. Mrk or P.
    Pacher  Institute  of  Physics,  Technical University of Budapest,
    H-1111 Budapest, Budafoki u. 8. , HUNGARY

         If you  want to  design your  own experiments  and use  other
    features  of  TEDDY  not  contained  in this DEMO including piston
    movement,  diathermal  walls,  pressure  and  temperature density,
    Brownian motion, diagram  editing and printing  ... and many  more
    don't hesitate to order the full version of TEDDY.


 *** End of file README.TXT, Phys Inst. TU Budapest, March 28, 1990 ***

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