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| | Real-time - Wikipedia, the free encyclopedia |
 | | Real stores (and real real-time systems) often need better than real-time performance, and worst-case scenarios must be carefully evaluated. | | | In the economy, real-time systems are information technologies, which provide real-time access to information or data. | | | Alternately, a system is said to be hard real-time if the correctness of an operation depends not only upon the logical correctness of the operation but also upon the time at which it is performed. |
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http://en.wikipedia.org/wiki/Real-time
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| | Real-time computing - Wikipedia, the free encyclopedia |
| | For instance, a chess program designed to play in a tournament with a clock will need to decide on a move before a certain deadline or lose the game, and is therefore a real-time computation, but a chess program that is allowed to run indefinitely before moving is not. | | | The real-time constraint, or deadline, in this system is the time in which the brakes must be released to prevent the wheel from locking. | | | The classic example of a real-time computing system is the anti-lock brakes on a car. |
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http://en.wikipedia.org/wiki/Real-time_computing
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| | Real-time computing - Wikipedia, the free encyclopedia |
| | For instance, a chess program designed to play in a tournament with a clock will need to decide on a move before a certain deadline or lose the game, and is therefore a real-time computation, but a chess program that is allowed to run indefinitely before moving is not. | | | The needs of real-time software are often addressed in the context of real-time operating systems, and synchronous programming languages, which provide frameworks on which to build real-time application software. | | | A real time system may be one where its application can be considered (within context) to be mission critical. |
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http://en.wikipedia.org/wiki/Real-time_computing
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| | Real-time computing - definition of Real-time computing in Encyclopedia |
| | Real-time computing is the subject of hardware and software systems which are subject to constraints in time. | | | Real-time computing - definition of Real-time computing in Encyclopedia | | | It would not be possible to offer modern commercial air travel if these computations could not reliably be performed in real time. |
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http://encyclopedia.laborlawtalk.com/Real-time_computing
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| | What is real time? - A Word Definition From the Webopedia Computer Dictionary |
| | Real time can also refer to events simulated by a computer at the same speed that they would occur in real life. | | | In addition, there are links to related real time computing Web sites. | | | In graphics animation, for example, a real-time program would display objects moving across the screen at the same speed that they would actually move. |
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http://www.webopedia.com/TERM/I/real_time.html
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| | Real-time Cmix - Wikipedia, the free encyclopedia |
| | Real-Time Cmix (RTcmix) is one of the MUSIC-N family of computer music programming languages. | | | Real-time capability was added by Brad Garton and David Topper in the mid-1990s, with support for TCP socket connectivity, interactive control of the scheduler, and object-oriented embedding of the synthesis engine into fully featured applications. | | | RTcmix is descended from the MIX program developed by Paul Lansky at Princeton University in 1978 to perform algorithmic composition using digital audio soundfiles on a VMS mainframe computer. |
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http://www.wikipedia.org/wiki/Real-Time_Cmix
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| | Real-time Linux Software Quick Reference Guide |
| | You've probably realized by now that there are many ways to add real-time capabilities to Linux based systems. | | | Real Time Linux for Embedded Systems in the Internet Era -- a copy of the presentation given by Victor Yodaiken at the Embedded Linux Expo & Conference, June 2000 | | | RED-Linux -- a real-time version of Linux that implements short kernel blocking time, quick task response time, a modularized and runtime replaceable CPU scheduler, and a general scheduling framework. |
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http://www.linuxdevices.com/articles/AT8073314981.html
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| | Real |
| | Real-time computing Real-time computing is the subject of software systems which are subject to constraints in time. | | | Real analysis Real analysis is that branch of integration and sequences of functions. | | | The Real McCoys The Real McCoys was a 1963. |
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http://www.brainyencyclopedia.com/topics/real.html
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| | Hard Real-Time Computing Systems (John's Book Pages) |
| | Hard Real-Time Computing Systems is not a how-to manual -- it's a concise, well-organized summary of important research results in the area of real-time CPU scheduling. | | | Many practical topics are not covered; for example, tools and languages for building real-time systems, calculation or estimation of worst-case execution time, and the priority and semaphore style of programming in which most real-time systems are implemented. | | | Still, Buttazzo's book the best general resource about scheduling theory that I know of; it makes good background reading and would be a fine choice of textbook for a graduate or advanced undergraduate course. |
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http://books.regehr.org/reviews/hardrealtimecomputingsystems.html
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| | Real-time - Wikipedia, the free encyclopedia |
| | Real stores (and real real-time systems) often need better than real-time performance, and worst-case scenarios must be carefully evaluated. | | | It has been suggested that Real-time computing be merged into this article or section. | | | In the economy, real-time systems are information technologies, which provide real-time access to information or data. |
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http://en.wikipedia.org/wiki/Real-time
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| | Real-time Systems |
| | A hard real-time system is one where the response time (maximum or minimum) is specified as an absolute value. | | | A hard real-time system is one where the response time is specified as an absolute value. | | | A hard real-time system has an absolute response value, dictated by the environment, whereas a soft system specifies an average value, determined by the business or market. |
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http://www.artisansw.com/mentor/Overview/RealtimeSystems/tspRealtime_Systems_and_Software.htm
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| | Specification and Analysis of Weakly Hard Real-Time Systems |
| | For this purpose, the concept of hard real-time system is weakened to include systems for which the distribution of its met and lost deadlines is precisely bounded. | | | Hard systems that are not strongly hard will be called weakly hard real-time systems or simply weakly hard systems. | | | For hard real-time systems, it is imperative that no deadline be missed, whilst in soft real-time systems it is acceptable to miss some of them occasionally. |
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http://www-users.cs.york.ac.uk/~bernat/phd/phd.html
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| | Embedded.com - Introduction to Real Time |
| | A real-time system is one in which the correctness of the computations not only depends on their logical correctness, but also on the time at which the result is produced. | | | Real time does not mean fast; it means that a system has timing constraints that must be met to avoid failure. | | | For example, a system can be designed with pre-allocated time slots for each task. |
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http://www.embedded.com/story/OEG20011016S0120
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| | Real-Time Systems |
| | Based on this a real-time system can be decomposed into a set of subsystems i.e., the controlled object, the real-time computer system and the human operator. | | | They are defense and space systems, networked multimedia systems, embedded automative electronics etc. In a real-time system the correctness of the system behavior depends not only the logical results of the computations, but also on the physical instant at which these results are produced. | | | A real-time computer system must react to stimuli from the controlled object (or the operator) within time intervals dictated by its environment. |
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http://www.ece.cmu.edu/~koopman/des_s99/real_time
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| | The Maruti Project |
| | The purpose of the Maruti project is to create an environment for the development and deployment of critical applications with hard real-time constraints in a reactive environment. | | | The proof-of-concept version of this design was implemented to run on top of the Unix operating system and supported hard and non-real-time applications running in a distributed, heterogeneous environment. | | | A hard real-time system must be capable of switching from one scenario to another, maintaining the system in a safe and stable state at all times, without violating the timing constraints. |
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http://www.cs.umd.edu/projects/maruti
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| | Real-Time Systems/Vanderbilt/Koo |
| | Real-time systems are computing systems that must react to the dynamic environments under timing constraints. | | | The course covers topics on system modeling using the tagged signal models and timed models of computation [1], specifications and scheduling techniques for real-time tasks [2], simulation and verification of real-time systems, software architecture and language for constructing real-time systems [3,4,5]. | | | Timed models of real-time systems are obtained by adding timing constraints to their application software. |
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http://www.vuse.vanderbilt.edu/~kootj/Class/2005/Spring
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| | Time [Internet Encyclopedia of Philosophy] |
| | Some philosophers are suspicions about whether the future or past are somehow not as real as the present, the feature that is referred to by the word "now." But their opponents argue that, if the future were real, then it would be fixed now, and we would not have the freedom to affect that future. | | | The string theory of quantum gravity predicts that time is continuous, but the main alternative to string theory, loop quantum gravity, does not. | | | In one sense, which is not the sense meant by the phrase "the arrow of time," time is directed from the future to the past. |
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http://www.utm.edu/research/iep/t/time.htm
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| | Real-Time Overview |
| | Such systems can be said to be hard real-time systems to the degree that they have hard versus soft deadlines. | | | The most familiar example of a time constraint is a deadline, which is (properly but not popularly) defined as a time until which the activity's completion has more utility to the system, and after which the activity's completion has less utility. | | | The theory and techniques employed to guarantee that hard deadlines will always be met are much simpler and more commonly understood than the theory and techniques employed (a' priori or at execution time) to assure that soft deadlines will attain acceptable sequencing optimality and predictability of that optimality. |
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http://www.real-time.org/realtimeoverview.htm
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| | Real time data acquisition |
| | Computers used to acquire data in science experiments, in industrial control systems, aerospace applications and some other contexts differ from the "normal", everyday computer most people know in the sense that they are generally "real-time" computers. | | | The concept of interrupts is vital to real-time computing. | | | Naturally, this definition of real-time means that the requirements for the computer system depends highly on the speed of the external processes in question. |
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http://lynx.uio.no/rt.html
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| | Weakly Hard Real-Time Systems - Bernat, Burns, Llamos (ResearchIndex) |
| | Response Time Analysis of Asynchronous Real-Time Systems - Bernat (2002) | | | Abstract: In a hard real-time system it is assumed that no deadline is missed, whereas in a soft or rm real-time system deadlines can be missed, although, this usually happens in a nonpredictable way. | | | However, most hard real-time systems could miss some deadlines provided that it happens in a known and predictable way. |
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http://citeseer.ist.psu.edu/238419.html
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| | CIESE - Curriculum: Educational Links: Real Time Data Sites |
| | Real Time Ocean Environment -- Data from the Naval Research Laboratory | | | Volcano World - brings modern and near real time volcano information to users of the Internet. | | | Real Time Water Data from streams and rivers around the United States |
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http://www.k12science.org/realtimedatasites.html
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| | Real Time Computing |
| | Innovative, application and programming language oriented real time computer architectures are being designed which satisfy the predictability requirements and which keep the semantic gap, that has to be filled by an operating system, as small as possible. | | | Owing to the intrinsic problems of real time operation as outlined above, the chair bases its research on working out fundamental principles, in particular with respect to the concept of time in computer science and engineering. | | | The objective of this work is the development of timing analysis techniques and of computing systems with completely predictable behaviour. |
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http://www.fernuni-hagen.de/IT/eng/old-eng/node3.html
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| | Real-Time Computing Applications - MSc/Postgraduate Diploma - Nottingham Trent University |
| | The Real Time Computing Application courses within the School are taught by highly experienced staff members, many of whom are involved with cutting-edge research that ensures their teaching remains at the forefront of computing technology. | | | Based within the new, purpose-built, £8 million building of the School of Computing and Informatics, we are able to offer postgraduates the option to study either a Postgraduate Diploma or MSc in Real Time Computing Application. | | | We’ve invested heavily in computing facilities, which include multiple networked computer rooms, multimedia editing suites and specialist labs for imaging, networks and communications for the use of computing and informatics students. |
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http://www.ntu.ac.uk/postgrad/coursefinder/index.cfm?p=2&course=ADCB8918-981F-4017-8DAE-D5DCA92B8050
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| | Real-Time Rendering Resources |
| | What you probably really want to be doing for production rendering is create effects files instead, which give you a higher level of abstraction. | | | Jeff Lander has written a good set of articles about polygon collisions (though really more on point in polygon), collision detection using AABB's and separating planes, and collision response. | | | Stan Melax presents a practical technique (used in MDK2) for using BSP trees for collision detection with a variety of different sized and shaped objects, with little additional memory cost (article's also on Gamasutra). |
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http://www.realtimerendering.com
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| | Real-Time Research at Boston University |
| | In a real-time system, the use of such algorithms may be detrimental, making it necessary to craft new algorithms that aim at minimizing the ``percentage of missed deadlines'', for instance. | | | Real-Time Computing is a generic enabling technology for many important applications, including multimedia, financial trading systems, air-traffic control systems, robotics, and process control, just to name a few. | | | These requirements are usually stated as constraints on response time and/or on the temporal validity of sensory data. |
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http://www.cs.bu.edu/groups/realtime/Home.html
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| | LWN: MontaVista unveils "open" hard-real-time Linux project (LinuxDevices) |
| | In a SMP system you will want to use spinlocks for locks whereas in a real time system you will more often want a more expensive mutex lock (with a priority inversion prevention) such that you can be preempted within the lock by higher priority tasks. | | | Also in a SMP you just want to run ahead in interrupt whereas in a real time system you often want to do your stuff in a lower priority task which can be preempted. | | | I am not entirely convinced making Linux itself into a real time system is either a good idea or will work at all. |
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http://lwn.net/Articles/106011
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| | Near Real-Time Image Reconstruction |
| | Parallel computers in supercomputing centers have been used for numerical calculations in astrophysics, however, they cannot be used for real-time data processing because the observational data cannot be transferred to a supercomputing center in real-time. | | | In the final section, we discuss some of the preliminary results of near real-time image reconstruction. | | | In the following sections,we use the aforementioned 1k x 1k pixel data to study various implementation aspects of near real-time image reconstruction. |
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http://www.bbso.njit.edu/~cdenker/real_time.html
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| | Intel Proposal: Real-Time Process Control (A4) |
| | This project focuses on the application of this advanced control methodology using new algorithms implemented on an Intel platform operating as a real-time system. | | | The complex optimization, control, and estimation algorithms employed in this research are computationally demanding in the content of the sampling time required (e.g., several seconds). | | | The model-based control algorithm uses a simultaneous solution and optimization approach to determine the open-loop optimal manipulated variable trajectory at each sampling instant. |
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http://www.utexas.edu/computer/itc/intel/projects/A4.html
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| | DISTRIBUTED HARD REAL-TIME SYSTEMS |
| | There are some minimal requirements that should be satisfied by any language used for building hard real-time systems. | | | Many of the current high-level languages that have been called real-time programming languages, although well-suited for systems programming, are not suited for programming hard real-time systems. | | | Moreover, the language definition forces every construct in the language to be time- and space-bounded. |
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http://www.ii.uj.edu.pl/progroz/dishard/languages.html
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