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[en] The user is often the most overlooked component of control system design. At Jefferson Lab the control system is almost entirely digital in nature, with little feedback except that which is deliberately designed into the control system. In the complex control room environment a good design can enhance the user's abilities to preform good science. A bad design can leave the user frustrated and contribute significantly to down time, when science is not being done. Key points of use and design from the user's perspective are discussed, along with some techniques which have been adopted at Jefferson Lab to improve the user experience and produce better, more usable software
[en] This book consists of three chapters. The first chapter deals with basic knowledge of micro computer control which are computer system, micro computer system, control of the micro computer and control system for calculator. The second chapter describes Interface about basic knowledge such as 8255 parallel interface, 6821 parallel interface, parallel interface of personal computer, reading BCD code in parallel interface, IEEE-488 interface, RS-232C interface and transmit data in personal computer and a measuring instrument. The third chapter includes control experiment by micro computer, experiment by eight bit computer and control experiment by machine code and BASIC.
[en] Mono is an independent implementation of the .NET Framework by Novell that runs on multiple operating systems (including Windows, Linux and Macintosh) and allows any .NET compatible application to run unmodified. For instance Mono can run programs with graphical user interfaces (GUI) developed with the C(numbersign) language on Windows with Visual Studio (a full port of WinForm for Mono is in progress). We present the results of tests we performed to evaluate the portability of our controls system .NET applications from MS Windows to Linux
[en] An affordable solution to Tier-3 Regional Center (RC) is presented. A simple prototype has been set up for evaluation of the system performance, which can be easily scaled to bigger one. A set of measurements have been conducted in both computer and network system behaviours in multiple concurrently running jobs contexts. The measured results are discussed, including system and network effective utilizations and limitations, and the identified bottlenecks in different network layouts, and the comparisons with simulation
[en] This book introduces instrumentation and control system using PC such as an example of instrumentation and control system, composition of computer system form of PC and control, and characteristic of PC control, machine code for instrumentation and control by PC like comparison machine language with Basic, interface of machine code and Basic, and assemble grammar and practice, digital IC and OP amp, Z-80 CPU, including basic composition, basic operation, peripheral device circuit of CPU, introduction of interface, practice of PC instrumentation and control system, and application technology.
[en] In recent years the rapid increase in processing power of the personal computer has made it a significant competitor to high-end workstations for accelerator control and experimental physics applications. When the decreasing price of the PC and the availability of inexpensive commercial software is also considered, NT becomes a very attractive alternative to traditional UNIX systems. In order to simplify the integration of Personal Computers into our operating environment, we have ported the Control Device (CDEV) Interface to Windows NT. By supporting CDEV on this platform, we can provide routine access to our existing control system. Additionally, CDEV allows us to create an interface from our UNIX workstations to Windows NT applications (such as databases) that are significantly less expensive on the PC. This paper details the pitfalls we encountered during the software migration and will provide a direct comparison between the performance of CDEV applications on UNIX and NT. P articular attention is paid to network performance, which represents most of the overhead of this transition
[en] A system is presented for use in Nuclear Physics Data Acquisition. The system is hosted on a Personal Computer's ISA bus, and is based on the TMS320C31 digital signal processor (DSP), a fast floating point DSP that simultaneously handles several different tasks in this system, by means of an interrupt-driven architecture. The system includes three different data acquisition modules: a multichannel analyzer, a multi-channel scaler, and a signal analyzer. Using the interrupt-driven architecture, the DSP pre-processes the data coming from the three different data acquisition modules. and accepts data requests from the host PC. On the PC side, the system runs under Microsoft Windows 95 or Windows NT, and it implements the client-server model. While the data acquisition board performs its chores independently, the host PC sends it several commands on behalf of an arbitrary number of clients. Those clients each represent a window over the data being acquired, allowing different users to take different views of the data. Each client can run on the same host computer or on any other computer, provided there is a computer network (the Internet is a possibility, as long as there is enough bandwidth) connecting it to the host. This allows the experimentalist to remotely examine the experimental results from his office without having to go to the lab. On the other hand, different experimentalists can have different views of the data being acquired. All these are benefits stemming from the client-server model