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	UT Medical Center - Blood pressure
		Blood pressure is a measurement of the force applied to the walls of the arteries as the heart pumps blood through the body.
		The pressure is determined by the force and amount of blood pumped, and the size and flexibility of the arteries.
		As the pressure falls, the level on the dial or mercury tube at which the pulsing is first heard is recorded.
	www.utmedicalcenter.org /encyclopedia/1/003398.htm (968 words)

	Fruit & Nut Research and Information Center - The Pressure Chamber, a.k.a. The Bomb - General Management
		In simplest terms, the pressure chamber can be thought of as measuring the "blood pressure" of a plant, except for plants it is water rather than blood, and the water is not pumped by a heart using pressure, but rather pulled with a suction force as water evaporates from the leaves.
		Simply put, the pressure chamber is just a device for applying air pressure to a leaf (or small shoot), where most of the leaf is inside the chamber but a small part of the leaf stem (the petiole) is exposed to the outside of the chamber through a seal.
		The amount of pressure that it takes to cause water to appear at the petiole tells you how much tension the leaf is experiencing on its water: a high value of pressure means a high value of tension and a high degree of water stress.
	fruitsandnuts.ucdavis.edu /General_Management/The_Pressure_Chamber,_aka_The_Bomb.htm (1082 words)

	Center of pressure - Wikipedia, the free encyclopedia
		The Center of Pressure (or CoP) is the point on a body where the sum of the total pressure acts.
		The CoP must be managed with respect to the center of mass (CoM), or center of gravity, for stability and efficiency during flight.
		The CoP must be greater than and aft of the CoM for stable flight of aircraft without adjustable control surfaces, such as simple rockets.
	www.wikipedia.org /wiki/Center_of_pressure (281 words)

	Center of pressure -- Facts, Info, and Encyclopedia article (Site not responding. Last check: )
		The Center of Pressure (or CoP) is the point on an (A vehicle that can fly) aircraft where all of the aerodynamic ((physics) the influence that produces a change in a physical quantity) forces act.
		The CoP must be managed with respect to the (Point representing the mean position of the matter in a body) center of mass (CoM), or (The point within something at which gravity can be considered to act; in uniform gravity it is equal to the center of mass) center of gravity, for stability and efficiency.
		The CoP must be greater than and aft of the CoM for stable flight of aircraft without adjustable control surfaces, such as simple (A jet engine containing its own propellant and driven by reaction propulsion) rockets.
	www.absoluteastronomy.com /encyclopedia/c/ce/center_of_pressure.htm (265 words)

	Paradoxes Resolved, Origins Illuminated - Gravity at the center of the Earth?
		The reason is simply that pressure requires mass on an area and the mass of a sphere at the center is resting upward in all directions.
		The mass at the center of a sphere is all around and resting at the gravity center and that is near the surface not near the center.
		If the pressure goes higher because the area of the sphere is less and less it seems to me at the mass center the area gets so small as the radius of the sphere goes to a very small size.
	www.metaresearch.org /msgboard/topic.asp?TOPIC_ID=148 (2515 words)

	Center of Pressure
		The variation of velocity produces a variation of pressure on the surface of the object as shown by the the thin red lines on the figure.
		We call the average location of the pressure variation the center of pressure in the same way that we call the average location of the weight of an object the center of gravity.
		Using the aerodynamic center as the location where the aerodynamic force is applied eliminates the problem of the movement of the center of pressure with angle of attack in aerodynamic analysis.
	www.grc.nasa.gov /WWW/K-12/airplane/cp.html (715 words)

	Encyclopedia: Center of pressure (Site not responding. Last check: )
		Pressure is the application of force to a surface, and the concentration of that force in a given area.
		The center of mass or center of inertia of an object is a point at which the objects mass can be assumed, for many purposes, to be concentrated.
		In physics, the center of gravity (CoG) of an object is the average location of its weight.
	www.nationmaster.com /encyclopedia/Center-of-pressure (601 words)

	UT Medical Center - High blood pressure (Hypertension)
		Pre-hypertension is when your systolic blood pressure is between 120 and 139 or your diastolic blood pressure is between 80 and 89 on multiple readings.
		Blood pressure measurements are the result of the force of the blood produced by the heart and the size and condition of the arteries.
		Even if you have not been diagnosed with high blood pressure, it is important to have your blood pressure checked during your yearly check-up, especially if someone in your family has or had high blood pressure.
	www.utmedicalcenter.org /encyclopedia/?file=000468.htm (920 words)

	High Pressure Centers: also known as anticyclones
		A high pressure center is where the pressure has been measured to be the highest relative to its surroundings.
		A high pressure center also represents the center of an anticyclone and is indicated on a weather map by a blue "H".
		Sinking air in the vicinity of a high pressure center suppresses the upward motions needed to support the development of clouds and precipitation.
	ww2010.atmos.uiuc.edu /(Gh)/guides/mtr/fw/prs/hghdef.rxml (118 words)

	Pressure Center - Pressure Washing Ormond Beach Daytona - Power Washing
		A pressure washer is a mechanical device that uses high-pressure water to remove mold, grime, dust mud and dirt from surfaces and objects such as buildings, vehicles and concrete road surfaces.
		Some pressure washers, in combination with a particular nozzle, allow detergent to be introduced into the water stream, assisting in the cleaning process.
		Pressure washers have a tendency to break up asphalt if aimed directly at it, due to high pressure water entering cracks and voids in the surface.
	pressurecenter.com (598 words)

	Kite Center of Pressure
		The forces include the aerodynamic lift, and drag which act through the center of pressure, the tension in the control line which acts through the bridle point, and the weight which acts through the center of gravity.
		The center of pressure is the average location of the aerodynamic forces acting on any object.
		To determine the stability and trim of the kite we need to be concerned with the magnitude of the aerodynamic forces and the location of the center of pressure.
	www.grc.nasa.gov /WWW/K-12/airplane/kitecp.html (566 words)

	Captain Ferber Is In Trouble - Friday, September 18, 1903
		The terms center of pressure and center of gravity are still used today to explain aerodynamic forces.
		Pressure is a measure of force over an area (Pressure = Force/Area), while the center of gravity refers to the force created by the weight of an object.
		However, the center of pressure on a javelin remains behind the center of gravity and the direction of the center of pressure is opposite that of the gravitational force.
	wings.avkids.com /Book/Wright/history1_190347.html (414 words)

	High Blood Pressure - Hypertension - Texas Heart Institute Heart Information Center
		Hypertension, the medical term for high blood pressure, is known as "the silent killer." Around 50 million Americans have high blood pressure, and as many as 15 million of them do not even know they have the condition.
		The numbers show your pressure in units of millimeters of mercury (mm Hg)—how high the pressure inside your arteries would be able to raise a column of mercury.
		Those with a blood pressure reading anywhere from 120/80 up to 139/89 (once thought to be normal) are now classified within a category called "prehypertension." The NHLBI says that about 45 million Americans fall within the prehypertension category, which puts them at twice the risk of developing high blood pressure later in life.
	www.tmc.edu /thi/hbp.html (1540 words)

	PRESSURE - Definition (Site not responding. Last check: )
		The act of pressing, or the condition of being pressed; compression; a squeezing; a crushing; as, a pressure of the hand.
		A contrasting force or impulse of any kind; as, the pressure of poverty; the pressure of taxes; the pressure of motives on the mind; the pressure of civilization.
		{Pressure gauge}, a gauge for indicating fluid pressure; a manometer.
	www.hyperdictionary.com /dictionary/pressure (325 words)

	[No title]
		If the pivot has been placed in the center of the dowel and if the dowel is uniform in size (area) the forces exerted by the air pressure will be equal on both sides of the pivot and the air current will produce no rotating effect.
		Keeping in mind the fact that the air pressure applied to a surface is proportional to the area of the surface, it then becomes possible to approximate the rotating effect of the action of the air pressure by making a uniform area cutout of your rocket and locating the balancing point of this cutout.
		To move the center of gravity forward, a heavier nose cone is used or a weight is added to the nose of the rocket.
	www.texnet.net /ccent/rockets/TR13.htm (1442 words)

	LASCO - Support Center (Pressure Ratings of Thermoplastic Fittings)
		The relationship of stress, pressure, and pipe dimensions is described by the ISO (for International Standardization Organization) Equation.
		Accordingly, the standards for plastic pipe, using the 0.5 service factor, required that the pressure rating of the pipe be based upon this Hydrostatic Design Stress, again calculated with the ISO equation.
		This is equivalent to recommending that the pressure rating of the pipe should equal 1.25 times the system design pressure for any particular installation.
	www.lascofittings.com /supportcenter/PressureRatingPlastics.asp (854 words)

	Pressure: Surface Highs and Lows (Site not responding. Last check: )
		In order to compare pressures in different locations, the NWS adjusts surface pressure readings at locations above sea level to what the reading would be if the station were actually at sea level.
		This strong pressure gradient produced peak wind gusts over 100 mph, and the storm caused $13.8 million in damage in Colorado in a two-day period.
		Weather forecasters watch the movement of patterns and changes in pressure, pressure gradients, moisture, and temperature as indicators of future weather development.
	meted.ucar.edu /hazwx/2_2_4.htm (370 words)

	Bernoulli Equations
		The conservation of momentum principle is the source of the relation between pressure and velocity.
		It is the pressure that would be measured at points in the flow where V = 0.
		in compressible isentropic flow (sometimes called the isentropic pressure rule) is derived from the compressible Bernoulli equation along with the expression for the speed of sound in a perfect gas.
	www.desktopaero.com /appliedaero/fundamentals/bernoulli.html (539 words)

	Aerodynamic Center
		The brothers understood the theory of their day, which incorrectly described a steady movement of the cp from the center of a flat plate forward to the leading edge of the plate as the angle of attack decreases from 90 degrees to zero.
		The modern use of the aerodynamic center to perform design and analysis, instead of the center of pressure, began several years after the brothers had successfully flown.
		We can consider this force to act through the average location of the pressure on the surface of the object which we call the center of pressure in the same way that we call the average location of the weight of an object the center of gravity.
	wright.nasa.gov /airplane/ac.html (732 words)

	Consumer Information Center - High Blood Pressure: Treat it for Life (Site not responding. Last check: )
		Because high blood pressure has no warning sighs, it is often called the "silent killer." People may not find out they have it until they have trouble with their heart, brain, or kidney.
		Blood pressure is the force of the blood pushing against the walls of those arteries.
		For instance, as your pressure rises from normal to Stage 1 high blood pressure, your risk of dying from heart disease or stroke doubles; as it rises to Stage 2, your risk triples.
	www.pueblo.gsa.gov /cic_text/health/hbptreat/2.htm (1289 words)

	Rocket Center of Pressure
		The aerodynamic forces are the result of pressure variations around the surface of the rocket.
		Since the center of pressure is an average location of the projected area, we can say that the area of the whole rocket times the location of the center of pressure cp is equal to the sum of the projected area of each component times the distance d of that component from the reference location.
		The center of pressure is on the axis, half way between the end planes.
	exploration.grc.nasa.gov /education/rocket/rktcp.html (548 words)

	center of pressure – the point on a plane surface, immersed in a fluid, at which the resultant pressure on the ... (Site not responding. Last check: )
		center of pressure – the point on a plane surface, immersed in a fluid, at which the resultant pressure on the surface may be taken to act.
		If the surface is horizontal in the liquid, the center of pressure coincides with the center of gravity; otherwise it is below the center of gravity but gets nearer to it as the liquid depth increases.
		It is defined with respect to a plane area because the system of forces on a curved area is not always reducible to a single force.
	www.yphysics.freenet.kz /Words%20C/center%20of%20pressure.htm (116 words)

	Pressure Activity: scaffolding activity
		Atmospheric pressure is the force exerted by the weight of the air above an object or surface.
		The purpose of this activity is to introduce characteristics of pressure, high and low pressure centers, and a brief analysis of an idealized pressure field.
		On this map, mark the positions of high and low pressure centers (using the correct symbols).
	ww2010.atmos.uiuc.edu /(Gh)/guides/crclm/act/prs.rxml (489 words)

	Aeroelastic Tailoring Procedure to Optimize Missile Fin Center of Pressure (Site not responding. Last check: )
		The axial center of pressure location of the flexible fin is shown relative to that of the steel rigid fin as a function of angle of attack for three supersonic Mach numbers.
		The design objective was to shift the center of pressure location forward to the maximum possible extent by varying the direction of the grooves of the flexible fin.
		The design calculations indicated that the center of pressure could be shifted forward, without appreciable change in fin normal force, with the grooves in a near spanwise direction.
	www.nearinc.com /near/project/aeroelas.htm (404 words)

	Helicopter Aviation
		Since the two vectors are not located at the same point along the chord line, a twisting force is exerted about the center of pressure.
		Center of pressure also moves along the chord line when angle of attack changes, because the two vectors are separated.
		Center of pressure remains relatively constant even when angle of attack is changed.
	www.copters.com /aero/pressure_patterns.html (289 words)

	Lavazza Training Center - Boiler Pressure, Level, Temperature
		In the case of a manually filled machine, the water in the boiler should be kept at a level corresponding to about the 70% level in the sight glass.
		This means that the boiler must be kept at a constant temperature of around 248 Degrees F and that the pressure gauge should read approximately 14.7 psi.
		If the pressure gauge indicates a higher or lower pressure, it should be adjusted by turning the regulator screw on the pressure controller.
	www.sovrana.com /boiler.htm (295 words)

	Embattled regional center under pressure to overhaul developmental disability services (Site not responding. Last check: )
		The center was known for cutting off intensive, one-on-one autism therapies for children older than age 3, and instead referring families to their local school district for the service.
		The regional center did pass along a 2001 rate increase, and it announced plans earlier this month to compensate family members who could not cover their respite costs because of Harbor's failure to pass along the 1998 raise.
		In a letter dated May 25, 2000, Harbor Regional Center said it considered the Area Board's requests to see clients on a "case by case basis." The matter was resolved a year later when the state ordered the regional center to allow the mandated assessments.
	www.psych-health.com /dds51.htm (1978 words)

	EFFECT OF PERIPHERAL NEUROPATHY ON CENTER-OF-PRESSURE MEASURES (Site not responding. Last check: )
		The purpose of the present study was to (1) determine the prevalence of PN in a population of known fallers (F), as compared to non-fallers (NF), and (2) examine the effect of PN on static center-of-pressure (COP) measures.
		Finally, the effect of the interaction between fall status and PN on COP measures is not surprising, considering that PN is a risk factor for falling.
		PN appears to (1) have elicited an increased quiet stance sway response, and (2) be associated with a higher incidence of falls in the population examined in this study.
	www.asb-biomech.org /onlineabs/abstracts99/073/index.html (748 words)

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