Monthly progress report

This report is the mid-year report intended for the design concepts for the communication network for the Advanced Solid Rocket Motor (ASRM) facility being built at Yellow Creek near Iuka, MS. The overall network is to include heterogeneous computers, to use various protocols, and to have different bandwidths. Performance consideration must be given to the potential network applications in the network environment. The performance evaluation of X window applications was given the major emphasis in this report. A simulation study using Bones will be included later. This mid-year report has three parts: Part 1 is an investigation of X window traffic using TCP/IP over Ethernet networks; part 2 is a survey study of performance concepts of X window applications with Macintosh computers; and the last part is a tutorial on DECnet protocols. The results of this report should be useful in the design and operation of the ASRM communication network

Integration of several computer systems within a heterogeneous environment

Issued as Project schedule, Cost and performance reports [nos. 1-16], Status reports [nos. 1-16], Report, Final draft report, and Final report, Project C-43-61

Data communication network at the ASRM facility

The main objective of the report is to present the overall communication network structure for the Advanced Solid Rocket Motor (ASRM) facility being built at Yellow Creek near Iuka, Mississippi. This report is compiled using information received from NASA/MSFC, LMSC, AAD, and RUST Inc. As per the information gathered, the overall network structure will have one logical FDDI ring acting as a backbone for the whole complex. The buildings will be grouped into two categories viz. manufacturing critical and manufacturing non-critical. The manufacturing critical buildings will be connected via FDDI to the Operational Information System (OIS) in the main computing center in B 1000. The manufacturing non-critical buildings will be connected by 10BASE-FL to the Business Information System (BIS) in the main computing center. The workcells will be connected to the Area Supervisory Computers (ASCs) through the nearest manufacturing critical hub and one of the OIS hubs. The network structure described in this report will be the basis for simulations to be carried out next year. The Comdisco's Block Oriented Network Simulator (BONeS) will be used for the network simulation. The main aim of the simulations will be to evaluate the loading of the OIS, the BIS, the ASCs, and the network links by the traffic generated by the workstations and workcells throughout the site

SWM - Simple Window Manager

Tato práce se zabývá návrhem a implementací klasického (nedlaždicového) správce oken pro X Window System. Správce oken se stará o rozmístění a vzhled oken jednotlivých aplikací na obrazovce a je tedy klíčovou součástí jakéhokoliv moderního počítače s grafickým rozhraním. Ačkoliv již existuje mnoho správců oken, zejména pro X Window System, chybí zde jednoduchý nedlaždicový. Tato práce se snaží jeden takový vytvořit. Cílem bylo, aby splňoval freedesktop standardy ICCCM a EWMH a držel se UNIXové filozofie dělat jednu věc a dělat ji dobře. Důraz byl také kladen na jednoduchost, čitelný a testovatelný kód, a na to, aby byl správce oken snadno použitelný a rozšiřitelný.This thesis deals with the design and implementation of a stacking window manager for the X Window System. A window manager is the core component of any modern graphical desktop - it is responsible for the placement and appearance of application windows on the screen. While there is a plethora of window managers, especially on the X Window System, most of them are either heavyweight window managers that are part of a desktop environment or lightweight tiling managers. In this thesis, we try to fill the gap by developing a lightweight stackable window manager that complies with the freedesktop standards such as ICCCM and EWMH, and that follows the UNIX philosophy of doing one thing and doing it well. The focus has been on simplicity, code readability, testability, and making it easy to use and extend

A network transparent, retained mode multimedia processing framework for the Linux operating system environment

Die Arbeit präsentiert ein Multimedia-Framework für Linux, das im Unterschied zu früheren Arbeiten auf den Ideen "retained-mode processing" und "lazy evaluation" basiert: Statt Transformationen unmittelbar auszuführen, wird eine abstrakte Repräsentation aller Medienelemente aufgebaut. "renderer"-Treiber fungieren als Übersetzer, die diese Darstellung zur Laufzeit in konkrete Operationen umsetzen, wobei das Datenmodell zahlreiche Optimierungen zur Reduktion der Anzahl der Schritte oder der Minimierung von Kommunikation erlaubt. Dies erlaubt ein stark vereinfachtes Programmiermodell bei gleichzeitiger Effizienzsteigerung. "renderer"-Treiber können zur Ausführung von Transformationen den lokalen Prozessor verwenden, oder können die Operationen delegieren. In der Arbeit wird eine Erweiterung des X Window Systems um Mechanismen zur Medienverarbeitung vorgestellt, sowie ein "renderer"-Treiber, der diese zur Delegation der Verarbeitung nutzt

Robotic control of a photometric telescope

The objective of this project was to design and implement the telescope control software for the Alan Cousins Telescope (ACT), a robotic telescope at the Sutherland, South Africa, site of the South African Astronomical Observatory (SAAO). The approach adopted involved a high level of modularisation of the software and the use of software simulators in an effort to foster rapid software development and enable more rigorous software testing. Significant attention was also paid to new and emerging technologies and how these may be used within the specific context of robotic telescope control software. The software now acts as a demonstration platform for those technologies that were implemented