
	Where results make sense

Topic: Particle velocity level

In the News (Tue 2 Dec 08)

Damian Green

Sumner Redstone

Crimson Tide

Tommy Tuberville

Bill Clinton

Wayne Rooney

Vilasrao Deshmukh

Wake Forest

Grand Slam

Oklahoma State

	Theremin Vox - Stories - Theory - Sound and Hearing -
		Particle displacement or particle amplitude ξ is a distance measurement in m (metre) of the movement of a particle(real or imagined) in a medium as it transmits a wave.
		Particle velocity is the velocity of a particle(real or imagined) in a medium as it transmits a wave.
		Velocity is a vector measurement of the rate and direction of motion.
	www.thereminvox.com /article/archive/37 (340 words)

	Encyclopedia :: encyclopedia : Particle velocity (Site not responding. Last check: )
		Particle velocity is the velocity v of a particle (real or imagined) in a medium as it transmits a wave.
		When applied to a sound wave through a medium of air, particle velocity would be the physical speed of an air molecule as it moves back and forth in the direction the sound wave is travelling as it passes.
		Particle velocity should not be confused with the speed of the wave as it passes through the medium, i.e.
	www.hallencyclopedia.com /topic/Particle_velocity.html (183 words)

	Theremin Vox - Particle velocity
		When applied to a sound wave through a medium of air, particle velocity would be the physical speed of an air molecule as it moves back and forth in the direction the sound wave is travelling as it passes.
		Particle velocity should not be confused with the speed of the wave as it passes through the medium, i.e.
		in the case of a sound wave, particle velocity is not the same as the speed of sound.
	www.thereminvox.com /article/view/164/1/37 (169 words)

	Sound
		Particles in the medium are displaced by the wave and oscillate.
		In a sound wave, the complementary variable to sound pressure is the acoustic particle velocity.
		For small amplitudes, sound pressure and particle velocity are linearly related and their ratio is the acoustic impedance.
	articles.gourt.com /en/Sound (1020 words)

	Sound particle velocity (Site not responding. Last check: )
		Particle velocity or sound particle velocity is the velocity v of air particles in m/s.
		Usually in acoustics the particle velocity is measured as the particle velocity level L
		The sound velocity is connected to particle displacement or particle amplitude ξ in m by:
	www.free-download-soft.com /info/acoustic-velocity.html (138 words)

	Particle Measuring Systems - Particle Monitoring Requirements in Pharmaceutical Cleanrooms (Site not responding. Last check: )
		Particles are significant because they can enter a product as an extraneous contaminant and can also contaminate it biologically by acting as a vehicle for microorganisms.
		Particle Measuring Systems recommends that measurements to confirm air cleanliness in critical areas be taken at sites where there is the most potential risk to the exposed sterilized product, containers, and closures.
		The level of monitoring varies with the classification of the cleanroom dependant on the use of the area.
	www.pmeasuring.com /support/papers/particlemonitoring/pharmaceutical/app41/viewHtml (2754 words)

	Sound
		In more technical language, sound "is an alternation in pressure, particle displacement, or particle velocity propagated in an elastic material" (Olson 1957) or series of mechanical compressions and rarefactions or longitudinal waves that successively propagate through media that are at least a little compressible (solid, liquid or gas but not vacuum).
		A sound wave is usually represented graphically by a wavy, horizontal line; the upper part of the wave (the crest) indicates a compression and the lower part (the trough) indicates a rarefaction.
		Amplitude is the maximal displacement of particles of matter that is obtained in compressions, where the particles of matter move towards each other and pressure increases the most and in rarefactions, where the pressure lessens the most.
	www.brainyencyclopedia.com /encyclopedia/s/so/sound.html (1157 words)

	GRC \| WIZMO - Steve's Windows Gizmo (Site not responding. Last check: )
		Since every particle gravitationally interacts with every other, large grids are time consuming to process because the number of computations increases by half of the square of the particle count ((Width x Height)^2)/2.
		Since the trail is composed of the individual previous positions occupied by the particles, the resulting "trail length" is directly proportional to the object's velocity at that time.
		Wizmo's graviton particles are normally prevented from leaving the visible screen through the presence of screen edge boundaries that cancel the particle's departure velocity.
	www.grc.com /wizmo/wizmo.htm (3731 words)

	What is a Particle Counter?
		Particles in the sample pass through the view volume and scatter the laser light; just as dust motes or smoke particles do in a sunbeam.
		Ordinary particle counters do not characterize the composition of the particles, but can serve as a very sensitive ‘canary in the coal mine’ to track trends and report events in the air quality of a workplace.
		They report that the military now employs portable particle counters to detect particulate level ‘events’ or surges that indicate the presence of new contaminants, and integrates these counters with test stations, which submit the sample to immediate testing to determine if the particles are biologically viable, and whether they match known threat profiles.
	www.particle.com /whitepapers_met/iaq.htm (1725 words)

	To do:
		That is, their velocity vector is decomposed into components normal to the surface and tangent to the surface.
		The particle colors, sizes, initial ages, velocities, and secondary positions are chosen according to their current domains.
		Of course, the number of particles actually copied is bounded by the available space in the current particle group, and the number of particles actually in the source particle group.
	www.cs.unc.edu /~davemc/Particle/Distrib/ParticleHelp_121.html (7193 words)

	Glossary of Terms: T
		Velocity at which a particle being transported by wind or water falls out of the moving medium.
		This velocity is dependent on the size of the particle.
		Velocity required to cause entrainment in the erosional agents of wind, water or ice.
	www.physicalgeography.net /physgeoglos/t.html (2101 words)

	Theoretical Principles of Plasma Physics and Atomic Physics
		As the latter is proportional to the velocity of the atom, the Doppler broadening reflects therefore directly the velocity distribution function of the atoms.
		For the calculation of the density of atomic levels populated by recombination, it is important that Radiative Recombination has to be described as a two-step process (see /research/levschem.htm), i.e.
		This statistical broadening is only the consequence of the variability of the energy levels due to the plasma field fluctuations and does not change the overall cross section or radiative emission rates because it is subject to the usual normalization of the particle density.
	www.plasmaphysics.org.uk (7930 words)

	Theremin Vox - Sound pressure
		The amplitude of sound pressure from a point source decreases in the free field (direct field) proportional to the inverse of the distance from that source.
		Sound pressure level is a decibel scale based on a reference sound pressure of 20 µPa (micropascals), calculated in dB as:
		Sound pressure p is connected to particle displacement (or particle amplitude) ξ, in m, by:
	www.thereminvox.com /article/view/162/1/37 (224 words)

	Maya Dynamics .: Design-Engine Education :. Maya Dynamics
		Students are to complete our level one Maya training.
		Maya Dynamics* Specialized course where the utilization of Maya® Dynamics and related Maya® tools for working with rigid bodies and dynamic constraints, control particle renderings, and intense geometry with particle motion are taught * Students learn to optimize and troubleshoot dynamic scenes and use Maya Artisan functionality in conjunction with dynamics.
		Discus exploding objects and using gravity and a hammer with velocity to break apart a model.
	www.proetools.com /courses/maya/level3.htm (303 words)

	A clean room validation dop testing particle counting velocity measurement asia india tamilnadu chennai
		A clean room validation dop testing particle counting velocity measurement asia india tamilnadu chennai
		Cleanrooms and cleanroom equipments are a major capital investment designed to provide you with a contamination-controlled environment.
		Particle counts to both Federal Standard 209E and ISO 14644
	www.aeromechindia.com /validations.htm (225 words)

	To do:
		Since particles are tested to see whether they would pass through the domain if pMove were called now, it is best to have pBounce be the last action that modifies a particle's velocity before calling pMove.
		Particles in the shock wave are accelerated away from the center by an amount proportional to magnitude.
		Accelerate particles that are near the center of the jet.
	www.alice.org /advancedtutorial/ParticleAPIDocs.html (7435 words)

	Beta particle Summary
		Beta particles are produced within the atomic nucleus when a neutron decays to produce an electron, a proton, and a neutrino.
		Beta particles are high-energy electrons or positrons emitted by certain types of radioactive nuclei such as potassium-40.
		Beta particles are also used in quality control to test the thickness of an item coming through a machine (paper coming through a roller being the most notable example).
	www.bookrags.com /Beta_particle (1530 words)

	www.davidson.com.au - Microflown Sound Pressure & Particle Velocity Sensors
		If background noise is present, intrinsically the use of acoustic particle velocity sensors to capture data is much better than using pressure transducers for a variety of reasons.
		Since a particle velocity signal only measures one single vector, it measures only 1/3rd of the background noise as it is measured by an omni-directional pressure transducer.
		Close to a sound emitting surface, the particle velocity level is high and pressure level is low.
	www.davidson.com.au /products/acoustics/microflown/sensors/car-engine.asp (803 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: )
		In a soundwave, the complementary variable to sound pressure is the acoustic particle velocity.
		The local instantaneous sound intensity is the product of the sound pressure and the acoustic particle velocity and is, therefore, a vector quantity in time.
		As the human ear can detect sounds with a very wide range of amplitudes, sound pressure is often measured as a level on a logarithmic decibel scale.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Sound (792 words)

	Nature of Thermal Spray Coatings
		This is evident in the coating microstructure as oxide inclusions outlining the grain or particle boundaries.
		This is thought to be due to compressive stresses formed from mechanical deformation (similar to shot peening) during particle impact counteracting the tensile shrinkage stresses caused by solidification and cooling.
		Ultrasonic and magnetic particle flaw detection methods have proved to be poor with thermally sprayed coatings due to the very high number of particle boundaries giving flaw like responses and causing high levels of interference.
	www.gordonengland.co.uk /tsc.htm (1750 words)

	W. Brent Daniel - PARTICLE INTERACTIONS
		Although significant progress has been made in the study of very low Reynolds number particles, the more complex interactions between particles that may have wakes, or may be actively shedding vortices, have, so far, found themselves absent the same level of attention.
		Finally, the particles are tracked between frames and quadratic fits made to the temporal evolution of the 3-space positions to extract velocity and acceleration information as well.
		particle tracks are shown with color representing the magnitude of the velocity at each point and the vectors representing the direction and magnitude of the acceleration.
	public.lanl.gov /wdaniel/science/particles/particles.html (517 words)

	Speed of sound Summary
		Sound can be described as a pressure disturbance that travels through the constituent particles of a medium: as one particle of the medium is perturbed by the pressure, it exerts a force on an adjacent particle, thus perturbing that particle in turn.
		This form of pressure disturbance is propagated through the medium exclusively as a longitudinal wave in the case of gases and liquids, i.e., a type of wave in which the displacement of the medium is parallel to the propagation of the wave.
		In conventional use and in scientific literature sound velocity, v, and sound speed, c, are used synonymously and should not be confused with sound particle velocity (also symbolized as v), which is the velocity of the individual particles.
	www.bookrags.com /Speed_of_sound (2746 words)

	ParticleAPI: Main Help (Site not responding. Last check: )
		A particle group is first created using GenParticleGroups, which will create a sequentially-numbered set of particle groups and return the identifying number of the first generated particle group.
		The particle group is then acted upon using the Actions.
		Code for some of the particle actions and several concepts regarding the structure of the API are thanks to Jonathan P. Leech, ljp@sgi.com.
	www.cs.unc.edu /~davemc/Particle/Distrib/ParticleHelp_210.html (1657 words)

	Cold Spray Coating Process
		The powder particles are accelerated and moderately heated to a certain velocity and temperature where on impact with a substrate they deform and bond to form a coating.
		As with the other processes a fine balance between particle size, density, temperature and velocity are important criteria to achieve the desired coating.
		The particles remain in the solid state and are relatively cold, so the bulk reaction on impact is solid state only.
	www.gordonengland.co.uk /coldspray.htm (625 words)

	Sound information - Search.com
		As a wave, sound is characterized by the properties of waves including frequency, wavelength, period, amplitude and velocity or speed.
		Prolonged exposure to a sound pressure level exceeding 85 dB can permanently damage the ear and sometimes resulting in tinnitus and hearing impairment.
		Sound levels in excess of 130 dB are considered upward of what the human ear can withstand and may result in serious pain and permanent damage.
	www.search.com /reference/Sound (1041 words)

	Sound pressure level, particle velocity, acoustic impedance, sound intensity characteristic impedance dB SPL ...
		Sound pressure level, particle velocity, acoustic impedance, sound intensity characteristic impedance dB SPL calculations ohm's law acousticequivalent pascal audio calculations - sengpielaudio
		In acoustics sound pressure, particle velocity and acoustical impedance are linear
		The well known law V = I · R means accordingly (equivalent) in the acoustics p = v · Z.
	www.sengpielaudio.com /calculator-ak-ohm.htm (310 words)

	HEPA Room Air Cleaners,Filters,IQAIR,IQ Air,Amaircare,Portable Filter Cleaner,Health ...
		Complete system is individually certified to remove at least 99.97% of particles 0.3 microns and larger, and 99% of all particles, even those below 0.3 microns, for pure, clean, particle free air.
		Pre-filter is 25 square feet, captures 90% of all dust mass and is 55% efficient at 0.3 microns for significantly extending the life and efficiency of the HEPA filter and motor.
		All units are individually tested with a particle counter to ensure that every air cleaner system sold meets or exceeds the HEPA efficiency standard for particle removal.
	www.healthgoods.com /Shopping/Indoor_Air_Quality_Products/HEPA_Room_Air_Cleaners.asp (2396 words)

	liverguard
		It shows the ratio of the particle velocity v
		The particle velocity level has the letter "L
		Sound particle velocity v should not be confused with Sound velocity c.
	www.liverguard.com /articleresources/?title=Particle_velocity_level (69 words)

	Particle Sizing Systems, for drop, droplet & bubble size distribution measurement (Site not responding. Last check: )
		VisiSpray A1000 Entry level system providing size, shape and velocity data for droplet sizes above 6 microns moving at less than 1 m/s or drop sizes over 70 microns at less than 15 m/s.
		VisiSpray A2000 General purpose system providing size and shape data (not velocity) for sprays with droplet sizes greater than 5 microns in high velocity sprays.
		VisiSpray A2000-V High performance system providing size, shape and velocity for sprays with droplet sizes greater than 5 microns in high velocity sprays.
	www.oxfordlasers.com /systems/particle_sizing.htm (358 words)

	Particle Monitor
		An instrument for the continuous, inline, online monitoring of particle flow and concentration; solid particles, and colloids in gases and liquids, and liquid droplets and aerosols in gases.
		The monitor can measure the number and average mass of particles, and the mass of each individual particulate and calculate particle size.
		Note: The total number of Probes and velocity or other analog input signals cannot exceed eight in the standard configuration.
	www.mindspring.com /~jonasinc/particle.htm (733 words)

Try your search on: Qwika (all wikis)