... 77, 1995 R. A. Shaw, H. E. Payne, and J. J. E. Hayes, eds. Simulations of Pinhole Imaging for AXAF: Distributed Processing Using the MPI Standard D. Nguyen and B. Hillberg Smithsonian Astrophysical Observatory, 60 Garden St., Cambridge, MA 02138 Abstract. The pinhole simulation program is a computationally and memory intensive task. ... Pinhole Simulation in Sequential Mode The task of the pinhole program is to tabulate the weight of the photons detected through a pinhole. ...

Distributed Software for Observations in Near Infrared V. Gavryusev 1 and C. Baffa Osservatorio Astrofisico di Arcetri E. Giani Dipartamento di Astronomia, Universit`a di Firenze Abstract. ... The processes denoted for control of hardware (telescope and other instruments) should be executed currently on PC dedicated for this task under DESQview/X, while all other components (user interface, tools for the data analysis, etc.) can work also under Unix. ... 1993, Di Giacomo et al. 1993). ...

Analysis of general features of the chaotic system behavior and investigation of the properties of concrete chaotic sources. ... Analysis of information properties of chaotic systems and chaotic oscillations as concrete objects for information processing and comunications. ... This hypothesis gives a possibility of designing simple mathematical structures accomplishing various processes of information processing using chaos. ... Activities | ... E-mail: chaos@mail.cplire.ru ...

... user-defined data file formats . ... better integration with a user's analysis routines To add such functionality to SAOimage, we developed the XPA Messaging System that allows X programs to define points of public access through which data and commands can be exchanged with external programs. ... We have utilized XPA to develop "SAOimage: The Next Generation" (SAOtng), an extensible image display service that can cooperate with other processes and programs. ... SAOtng help pages . ...

... Critics analyze the design as it progresses. ... In [Fischer et al 1990] , several uses of critic systems are discussed, including supporting learning by offering criticism of solutions and/or methods of problem-solving; providing design environments which communicate with users in their domain language; and developing cooperative problem-solving systems which combine the talents of humans and computers to come up with the best solutions. ... Directors guide the user toward good design choices. ...

The aim of this section of the course is to enable you to use simple computer programs to solve a variety of common astronomical tasks. ... I have (somewhat arbitrarily) decided to use Python for this course, because it seems to be gaining popularity fast for astronomical data handling, and because some of you will have encountered it at the ATNF course. ... We've put Python (plus all relevant libraries) on the Stromlo Linux computers moron and maggot. ... Now log in to moron (or maggot). ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... You are here: start €Ё difx €Ё difxmpi . ... difx:difxmpi . The DiFX software correlator uses MPI for organizing the spawning of processes on different computers and for transmitting data from one process to another. MPI is used only for communication between mpifxcorr processes. ... MPI assigns each process that it starts an integer identifier (called rank) that is used to refer back to that process. ... A vast majority of known DiFX installations use OpenMPI (available at www.openmpi.org ). ...

Hardware Structure CLOCKS BIASES SEQUENCER ADC DSP Communication Channel Data Channel FIBERLINK VME L C U Parallel-/ Serial-Port Host Computer SUN UltraSparc EDT DMA Board Hardware Structure CLOCKS BIASES SEQUENCER ADC DSP Communication Channel Data Channel FIBERLINK PCI-Bus Interface To RTC Host Computer Linux PC, 2+ CPU Physical Interfaces EDT DMA Interface Board plus Serial/Parallel Port Driver for data -channel delivered by EDT (Linux, Solaris) ... High processing speed requirements. ...

... The acquisition data base of meteorological temporal data including systematic and chronologic cataloque for Global Tropical Cyclogenesis (on the whole of World Ocean's aquatorium) for 1983-1992 time interval is developed and based on personal computer IBM PC/AT. ... The data base consists of the following units: 1. ... This data base offers a unique opportunity to analyze macro- and synoptic-scale temporal features of global tropical cyclogenesis as indivisible physical process. ...

A very important stage in a story of formation of any new science is the shift from discussion of situation which are possible but do not occur in practice due to some reason to recognition of real phenomena of interest. ... We suggest to consider computer viruses as this new specific form of life which is coming in the contact with our form of life. ... Computer life has been created by human being, the role of independent evolution of computer viruses seems to be still negligible. ...