CS101-GDB-announced

by **winnersgroup** Tue Feb 08, 2011 4:19 pm

Graded MDB Announcement Dated: Feb 01, 11
Dear Students,

Your Graded MDB is announced. You have to submit your graded MDB on LMS from 07 February, 2011 to 08 February, 2011.

Topic for GMDB is as under;

In real-time systems (embedded in machinery, robots, scientific instruments and industrial systems) Response Time is more desirable than Ease of Use. Justify your comments with appropriate reasons.

Note: A concise, coherent and to the point comment is preferred over lengthy comment having irrelevant details. Your comment must not be more than 5-7 lines. Comments, posted on regular Lesson's MDB or sent through email will NOT be considered. Any request about such an acceptance will not be catered.
Best of Luck

by **winnersgroup** Tue Feb 08, 2011 4:21 pm

The real time operating systems are the systems that have the characteristic of quick work and fast output. They provide required working applications for the sake of navigation as the navigation required constant and steady flow of information. In real there are less real time operating systems as they can take few moments to deliver output. Real time operating system moves the objects of animation as they are actually.

by **winnersgroup** Tue Feb 08, 2011 4:21 pm

Real-time operating systems are systems that respond to input immediately. They

are used for such tasks as navigation, in which the computer must react to a steady

flow of new information without interruption. Most general-purpose operating systems

are not real-time because they can take a few seconds, or even minutes, to react.

Real time can also refer to events simulated by a computer at the same speed that

they would occur in real life. 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.

by **winnersgroup** Tue Feb 08, 2011 4:22 pm

In real-time systems (embedded in machinery, robots, scientific instruments and industrial systems) Response Time is more desirable than Ease of Use. Justify your comments with appropriate reasons.
Solution
In real time system take more time to response and process. It seems to be real to human beings but it take processing time and then reload the application or reprograme it which take time. Real-time operating systems are systems that respond to input immediately. They are used for such tasks as navigation, in which the computer must react to a steady flow of new information without interruption. Most general-purpose operating systems are not real-time because they can take a few seconds, or even minutes, to react. Real time can also refer to events simulated by a computer at the same speed that they would occur in real life. 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. Real-time operating systems are systems that respond to input immediately. They are used for such tasks as navigation, in which the computer must react to a steady flow of new information without interruption. Most general-purpose operating systems are not real-time because they can take a few seconds, or even minutes, to react. Real time can also refer to events simulated by a computer at the same speed that they would occur in real life. 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.

by **winnersgroup** Tue Feb 08, 2011 4:23 pm

More Helping Material....

In real-time systems (embedded in machinery, robots, scientific instruments and industrial systems) Response Time is more desirable than Ease of Use. Justify your comments with appropriate reasons.

In computer science, real-time computing (RTC), or reactive computing, is the study of hardware and software systems that are subject to a "real-time constraint"—i.e., operational deadlines from event to system response. Real-time programs must execute within strict constraints on response time.[1] By contrast, a non-real-time system is one for which there is no deadline, even if fast response or high performance is desired or preferred. 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. The anti-lock brakes on a car are a simple example of a real-time computing system — the real-time constraint in this system is the time in which the brakes must be released to prevent the wheel from locking. Real-time computations can be said to have failed if they are not completed before their deadline, where their deadline is relative to an event. A real-time deadline must be met, regardless of system load.
Real-time computing is sometimes misunderstood to be high-performance computing, but this is not always the case. For example, a massive supercomputer executing a scientific simulation may offer impressive performance, yet it is not executing a real-time computation. Conversely, once the hardware and software for an anti-lock braking system has been designed to meet its required deadlines, no further performance gains are necessary. Furthermore, if a network server is highly loaded with network traffic, its response time may be slower but will (in most cases) still succeed. Hence, such a network server would not be considered a real-time system: temporal failures (delays, time-outs, etc.) are typically small and compartmentalized (limited in effect) but are not catastrophic failures. In a real-time system, such as the FTSE 100 Index, a slow-down beyond limits would often be considered catastrophic in its application context. Therefore, the most important requirement of a real-time system is predictability and not performance.
Some kinds of software, such as many chess-playing programs, can fall into either category. 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. In both of these cases, however, high performance is desirable: the more work a tournament chess program can do in the allotted time, the better its moves will be, and the faster an unconstrained chess program runs, the sooner it will be able to move. This example also illustrates the essential difference between real-time computations and other computations: if the tournament chess program does not make a decision about its next move in its allotted time it loses the game—i.e., it fails as a real-time computation—while in the other scenario, meeting the deadline is assumed not to be necessary.
A key characteristic of an RTOS is the level of its consistency concerning the amount of time it takes to accept and complete an application's task; the variability is jitter[1]. A hard real-time operating system has less jitter than a soft real-time operating system. The chief design goal is not high throughput, but rather a guarantee of a soft or hard performance category. An RTOS that can usually or generally meet a deadline is a soft real-time OS, but if it can meet a deadline deterministically it is a hard real-time OS
A real-time OS has an advanced algorithm for scheduling. Scheduler flexibility enables a wider, computer-system orchestration of process priorities, but a real-time OS is more frequently dedicated to a narrow set of applications. Key factors in a real-time OS are minimal interrupt latency and minimal thread switching latency, but a real-time OS is valued more for how quickly or how predictably it can respond than for the amount of work it can perform in a given period of time

by **winnersgroup** Tue Feb 08, 2011 4:23 pm

In real-time control and real-time process control the computer is required to process systems data (inputs) from sensors for the purpose of monitoring and computing system control parameters (outputs) required for the correct operation of a system or process. The type of monitoring and control functions provided by the computer for subsystem units ranges over a wide variety of tasks, such as turn-on and turn-off signals to switches; feedback signals to controllers (such as motors, servos, and potentiometers) to provide adjustments or corrections; steering signals; alarms; monitoring, evaluation, supervision, and management calculations; error detection, and out-of-tolerance and critical parameter detection operations; and processing of displays and outputs.

In real-time assistance the computer is required to do its work fast enough to keep up with a person interacting with it (usually at a computer terminal device of some sort, for example, a screen and keyboard). The computer supports the person or persons interacting with it and provides access, retrieval, and storage functions, usually through some sort of database management system, as well as data processing and computational power. System access allows the individual to intervene in the system's operation. The real-time computer also often provides monitoring or display information, or both.

In real-time robotics the computer is a part of a robotic or self-contained machine. Often the computer is embedded in the machine, which then becomes a smart machine. If the smart machine also has access to, or has embedded within it, artificial intelligence functions (for example, a knowledge base and knowledge processing in an expert system fashion), it becomes an intelligent machine.

by Najam

by **winnersgroup** Tue Feb 08, 2011 4:24 pm

Real-time operating systems are systems that respond to input immediately. It is used for such tasks as navigation, in which the computer must react to a steady flow of new information without interruption. It seems to be real to human beings but it take processing time and then reload the application or reprogram it which take time.

by **winnersgroup** Tue Feb 08, 2011 4:25 pm

In real-time systems (embedded in machinery, robots, scientific instruments and industrial systems) Response Time is more desirable than Ease of Use. Justify your comments with appropriate reasons.
Solution
In real time system take more time to response and process. It seems to be real to human beings but it take processing time and then reload the application or reprograme it which take time.

by **winnersgroup** Tue Feb 08, 2011 4:25 pm

CS101 GDB IDea Solution....

Real-time operating systems are systems that respond to input immediately. They are used for such tasks as navigation, in which the computer must react to a steady flow of new information without interruption. Most general-purpose operating systems are not real-time because they can take a few seconds, or even minutes, to react. Real time can also refer to events simulated by a computer at the same speed that they would occur in real life. 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.

by **winnersgroup** Tue Feb 08, 2011 4:26 pm

One more Solution

Real-time operating systems are systems that response input immediately without any type interruption. All RTOS components within LynxOS are designed for absolute determinism. This means that they absolutely must respond within a known period of time
Most general-purpose operating systems are not real-time because they may take a few seconds, or even minutes, to react. Real time can also refer to events simulated by a computer at the same speed that they would occur in real life.
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.

by **winnersgroup** Tue Feb 08, 2011 4:26 pm

One more Solution

Real-time operating systems are systems that response input immediately without any type interruption. All RTOS components within LynxOS are designed for absolute determinism. This means that they absolutely must respond within a known period of time
Most general-purpose operating systems are not real-time because they may take a few seconds, or even minutes, to react. Real time can also refer to events simulated by a computer at the same speed that they would occur in real life.
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.