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Topic: Control flow

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	Control Flow [EA User Guide]
		The Control Flow is a connector linking two nodes in an Activity diagram.
		Control Flow connectors bridge the flow between Activity nodes, by directing the flow to the target node once the source node's activity is completed.
		Each flow should have a Guard condition that is exclusive of the other and defines which edge is taken under what conditions.
	www.sparxsystems.com.au /EAUserGuide/controlflow.htm (188 words)

	Chapter 6. Control Flow (Site not responding. Last check: 2007-11-07)
		In the programs we have seen till now, there has always been a series of statements and Python faithfully executes them in the same order.
		As you might have guessed, this is achieved using control flow statements.
		There are three control flow statements in Python -
	www.ibiblio.org /g2swap/byteofpython/read/control-flow.html (91 words)

	Continuations and advanced flow control
		The first advanced flow control technique is one that you probably already know: non-local exits.
		In backtracking, a bookmark is kept where the assignment took place, and the flow control is reverted to that location if a computation fails and backtracking is necessary.
		For flow control to pass across the "guard" line (whether by continuation or by normal control flow), the appropriate procedure must be executed for clean-up (either "entering" or "exiting," depending on the direction).
	www.ibm.com /developerworks/linux/library/l-advflow.html?ca=dgr-lnxw09FlowControl (4259 words)

	Control Flow Blocks :: Creating a Model (Using Simulink)
		Although all the preceding control flow statements are implementable in Stateflow, these blocks are intended to provide Simulink users with tools that meet their needs for simpler logical requirements.
		Simulink control flow statement blocks allow you to retain or reset (to their initial values) the values of states for Action, For, and While subsystems when they are reenabled.
		In this case, control is given to a Switch Case block, which uses the value to choose one of several case subsystems to execute.
	www.mathworks.com /access/helpdesk_r13/help/toolbox/simulink/ug/creating_model24.html (1501 words)

	OMEGA ENGINEERING - Flow Control
		The flow rate and the specific gravity are inertia forces, and the pipe diameter and viscosity are drag forces.
		At very low velocities or high viscosities, R is low, and the liquid flows in smooth layers with the highest velocity at the center of the pipe and low velocities at the pipe wall where the viscous forces restrain it.
		Thus, when liquid flows through a pipe elbow, the force on the elbow's interior surface is proportional to the density of the liquid times the square of its velocity.
	www.omega.com /techref/flowcontrol.html (5120 words)

	Control Flow - GNU Compiler Collection (GCC) Internals (Site not responding. Last check: 2007-11-07)
		A control flow graph (CFG) is a data structure built on top of the intermediate code representation (the RTL or
		instruction stream) abstracting the control flow behavior of a function that is being compiled.
		The CFG is a directed graph where the vertices represent basic blocks and edges represent possible transfer of control flow from one basic block to another.
	gcc.gnu.org /onlinedocs/gccint/Control-Flow.html (102 words)

	Control flow Summary
		The control structure is especially useful when the control flow is not sequential--when certain instructions in the sequence need to be repeated, or when some instructions in a sequence are only executed under certain conditions.
		Control structures are being studied as a means of achieving the complete monitoring and control over all activities on a computer and the network to which it is a part.
		Discussion of control flow is almost always restricted to a single thread of execution, as it depends upon a definite sequence in which instructions are executed one at a time.
	www.bookrags.com /Control_flow (4747 words)

	Proportional Flow Control Valve -- South Bend Controls
		The driver is used to regulate a variable orifice which controls flow to the outlet port.
		This proportional flow control valve may be used to control a variety of both liquid and gaseous fluids.
		The particular configuration shown here is a liquid configuration which might be used to precisely control the flow of either hot or cold fluid in a cooling system.
	www.sbcontrols.com /proportional_flow_control.html (581 words)

	Flow control
		The objective of control is to match the stress vector along a portion of the boundary to a given vector; instability suppression is achieved by choosing the given vector to be that of a reference steady flow, e.g., Blasius flow for boundary layers.
		Control is effected by adjustments to the temprature of the fluid at the inflow boundary.
		Flow control and optimization is an ancient practice o man. For example, any dam, sluice, canal, levee, irrigation ditch, valve, duct, pipe, pump, hose, vane, etc., is an exercise in flow control or optimization, i.e., an attempt to control the mechanical and/or thermodynamical state of a fluid in order to achieve a desired purpose.
	people.scs.fsu.edu /~gunzburg/control.html (12332 words)

	Explicit Rate Flow Control
		A flow control mechanism is specified which supports several types of feedback to control the source rate in response to changing ATM layer transfer characteristics.
		Flow control is used to control the traffic sources so that they do not send too much data into the network at any moment.
		Flow control is the most critical factor in the performance of a data network.
	www.ziplink.net /~lroberts/Explicit-Rate/Explicit-Rate-Flow-Control.html (5575 words)

	Flow control
		The objective of control is to match the stress vector along a portion of the boundary to a given vector; instability suppression is achieved by choosing the given vector to be that of a reference steady flow, e.g., Blasius flow for boundary layers.
		Control is effected by adjustments to the temprature of the fluid at the inflow boundary.
		Flow control and optimization is an ancient practice o man. For example, any dam, sluice, canal, levee, irrigation ditch, valve, duct, pipe, pump, hose, vane, etc., is an exercise in flow control or optimization, i.e., an attempt to control the mechanical and/or thermodynamical state of a fluid in order to achieve a desired purpose.
	www.csit.fsu.edu /~gunzburg/control.html (12332 words)

	Valve Manufacturers Association of America - Flow Control Industry (Site not responding. Last check: 2007-11-07)
		By definition, a valve is a device that controls the flow of a fluid.
		It controls flow by means of a cylindrical or tapered plug with a hole in the center that lines up with the flow path of the valve to permit flow.
		The butterfly valve controls flow by using a circular disc or vane with its pivot axis at right angles to the direction of flow in the pipe.
	www.vma.org /html/flow_control.html (1547 words)

	About Flow Control Industries
		Flow Control Industries, a Washington State corporation, is the world's leading designer and manufacturer of industrial grade, pressure independent, modulating, flow control valves used in the HVAC industry.
		Flow Control Industries' valves dramatically reduce the number of poor performance issues, capital expenses, and operating costs associated with unavoidable system pressure fluctuations.
		This leads to better heat transfer at the coils, minimum flow, minimum pressure, and maximum delta T. Industrial quality pressure independent control valves are a technological advancement that enables hydronic systems to attain optimal energy efficiency and maximum capacity.
	www.flowcontrol.com /About (194 words)

	Control Flow [EA User Guide]
		Control flow connectors bridge the flow between activity nodes, by directing the flow to the target node once the source node's activity is completed.
		Control Flows and Object Flows may define a Guard and a Weight condition.
		Each flow should have a Guard condition which is exclusive of each other and defines which edge will be taken under what conditions.
	www.sparxsystems.com /EAUserGuide/controlflow.htm (184 words)

	Flow-Control Mechanisms (Linktionary term)
		Congestion control mechanisms allow network systems to detect network congestion (a condition in which there is more traffic on the network than can be handled by the network or network devices) and throttle back their transmission to alleviate the congestion.
		A receiver uses flow controls to signal to the sender that it is overloaded.
		Flow controls are necessary because senders and receivers are often unmatched in capacity and processing power.
	www.linktionary.com /f/flow_control.html (600 words)

	Welcome to Control Flow Inc. Online (Site not responding. Last check: 2007-11-07)
		Control Flow Inc. authorizes viewing and downloading of the materials at this site only for personal and non-commercial use, provided that all copyright and other proprietary notices contained in the original materials are retained on any copies of the materials.
		Control Flow Inc. has not reviewed all of these third party sites and does not control and is not responsible for any of these sites or their content.
		Control Flow Inc. makes no representation that materials at this site are appropriate or available for use outside the United States, and access to them from territories where their contents are illegal is prohibited.
	controlflow.com /terms_of_use.htm (697 words)

	RS232 flow control and handshaking
		With software flow control, which is also known under the name XON-XOFF flow control, bytes are sent to the sender using the standard communication lines.
		Using hardware flow control implies, that more lines must be present between the sender and the receiver, leading to a thicker and more expensive cable.
		Therefore, serial communication using software flow control is only acceptable when communication speeds are not to high, and the probability that buffer overruns or data damage occur are minimal.
	www.lammertbies.nl /comm/info/RS-232_flow_control.html (1253 words)

	Flow control feedback
		Flow control is a mechanism created to manage the flow of data between two full-duplex Ethernet devices.
		Through flow control, a device that is oversubscribed - either macroscopically from a system resource perspective or microscopically on a port-by-port basis - sends a pause message to its link partner to temporarily reduce the amount of data it's transmitting.
		The pros and cons of flow control implementations depend on how a device is deployed in an enterprise and the type of network traffic (data, voice or video) being carried among its link partners.
	www.networkworld.com /netresources/0913flow.html (616 words)

	Continuations and advanced flow control
		If complex flow control is not naturally nested, imposing a nested structure on it can make it less readable, not more.
		In backtracking, a bookmark is kept where the assignment took place, and the flow control is reverted to that location if a computation fails and backtracking is necessary.
		For flow control to pass across the "guard" line (whether by continuation or by normal control flow), the appropriate procedure must be executed for clean-up (either "entering" or "exiting," depending on the direction).
	www-128.ibm.com /developerworks/linux/library/l-advflow.html (4249 words)

	Flow Measurement & Control \| Flow Switches Melbourne \| Flow Meters & Indicators Australia - Baccara Automation ... (Site not responding. Last check: 2007-11-07)
		Baccara Automation Control have a comprehensive range of plastic flowmeters, based on the variable area principle, which are corrosion resistant, extremely accurate, simple to use and maintain, and which possess considerable impact resistance.
		As fluid flows past the turbine blades, a rotational torque is imposed onto the turbine and spring causing the turbine to rotate to a position where the spring's return force equals the fluid torque.
		Since variable fluid flow rate causes variable fluid torque, flow rate is measured by correlating turbine rotational displacement to flow rate.
	www.baccara.com.au /flow-measurement-and-control.shtml (661 words)

	Control of Flow Separation by means of electromagnetic forces
		Control of Flow Separation in weakly conducting liquids by means of electromagnetic forces
		Flow separation may occur in situations, where a boundary layer flow slowed down by wall friction is exposed to an adverse pressure gradient.
		Flow separation imposes severe limitations on the design and operation of several fluid mechanic devices.
	www.fzd.de /FWS/FWSH/EBLC/separation-control/separation-control.html (1425 words)

	What is flow control? - A Word Definition From the Webopedia Computer Dictionary (Site not responding. Last check: 2007-11-07)
		One of the most common flow control protocols for asynchronous communication is called xon-xoff.
		Flow control can be implemented in hardware or software, or a combination of both.
		For example, common looping statements such as fornext and while are known as flow control statements.
	www.webopedia.com /quick_ref/flow_control.html (340 words)

	Fieldbus technology improves flow measurement
		Nonetheless, additional flow measurement improvement can be achieved by transmitting signals to the control system or data acquisition system using digital signal transmission in place of analog signal transmission techniques.
		In process control systems, it is common for the flow transmitter to generate an analog signal (usually 4–20 mA) that is wired to the control system.
		The analog input module in the control system then converts the analog signal to a digital measurement that is used by the control system.
	www.controlglobal.com /articles/2004/339.html (686 words)

	Command Control Flow
		Programming structures control the flow of execution, whether and in what order statements are executed within a method.
		The loops are controlled in two ways: either they loop until a condition is met, or they loop a specified number of times.
		Each looping structure can be used in either way, but While loops and Repeat loops are more appropriate for repeating until a condition is met, and For loops are more appropriate for looping a specified number of times.
	www.4d.com /docs/CMU/CMU10087.HTM (282 words)

	Flow of control - MonetDB Reference Manual
		The control variable is used after the assignment statement has been evaluated to decide on the flow-of-control action to be taken.
		The control flow within and between blocks is simple enough to deal with during an optimizer stage.
		The redo expression updates the target variable i and control proceeds at the first statement after the barrier when the barrier is opened by i.
	homepages.cwi.nl /~mk/MonetDB/Flow-of-control.html (467 words)

	Pump Controller Flow Monitor
		Control Electronics model PSM-660 Pump Station Flow Monitor Controller is a highly accurate, simple to install pump control, flow monitoring system.
		In addition to monitoring the flow throughput, up to 4 pumps with LOW and HIGH alarm output can be controlled with the PSM-660 system.
		With the addition of an intermediate float switch elevation point, the flow monitor will calculate the inflow GPM just prior to the start of the pump cycle or select the average inflow rate based on the time it takes to fill the wet well.
	www.controlelectronics.com /660float.html (732 words)

	Flow Control Devices - Introduction
		The ability of a remotely operated Interval Control Valve (ICV) to reliably control flow into or out of an isolated reservoir interval is the basis of any SmartWell® design.
		The HVC is fitted with a tungsten carbide flow trim similar to that of the IV-ICV (boost piston) that can be customised so each valve will exactly match the operational requirements (ie finer flow ports for gas lift applications).
		Pressure applied to one control line opens the LV allowing pressure or flow to pass through the ball.
	www.welldynamics.com /products/flow_control_devices_intro.htm (613 words)

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