A Pneumaticstabilizedplatform PSP is a technology used to float a very large floating structure VLFS . PSP utilizes indirect displacement, in which a platform rests on trapped air that displaces the water. The primary buoyancy force is provided by air pressure acting on the underside of the deck. The PSP is a distinct type of pneumaticplatform, one in which the platform is composed of a number of cylindrical shaped components packed together in a rectangular pattern to form a module. The Development of the PneumaticStabilizedPlatform The Pneumatically StabilizedPlatform was originally proposed for constructing a new floating airport for San Diego in the Pacific Ocean, at least three miles off the tip of Point Loma . However, this proposed design was rejected in October, 2003 due to high cost, the difficulty in accessing such an airport, the difficulty in transporting jet fuel, electricity, water, and gas to the structure, failure to address security concerns such as a bomb blast, inadequate room for high speed exits and taxiways, and environmental concerns. http www.san.org Airport Authority Airport Site Selection faq.asp Also see floating airport External links http www.floatinc.com Float Incorporated http www.ccc.nps.navy.mil si 2005 Apr hillyardApr05.asp Center for Contemporary Conflict The Atlantis Garrison A Comprehensive, Cost Effective Cargo and Port Security Strategy by Dr. Michael J. Hillyard PSP Floating Airport technology could be used for Cost Effective Cargo & Port Security http www.pulseplanet.com archive Sep96 1302.html September 1996 FLOATING AIRPORTS Wave of the Future http www.sfgate.com cgi bin article.cgi?file chronicle archive 1999 11 18 MN37546.DTL November 18, 1999 by Michael McCabe, SF Chronicle Staff Writer Planes would land on floating runways built on S.F. Bay http cat.inist.fr ?aModele afficheN&cpsidt 3494214 Centre National De La Recherche Scientifique FLOATPORT a floating solution to the San Diego airport s environmental problems Auteur ... more details
Stabilized Images are images on the retina that are unaffected by microsaccade or ocular microtremor OMT . Experiments by Riggs and Ratliff 1950 ref Riggs, L. A., & Ratliff, F. 1952 . The effects of counteracting the normal movements of the eye. Journal of the Optical Society of America, 42, 872 873. ref established the remarkable finding that stabilized images result in the fading and disappearance of the visual percept. Some think that this demonstrates adaptation of the sensory retinal cells , but it may have a more profound involvement in the functioning of neural clique s, cell assembly theory cell assemblies cf. Hebbian theory and patterns for memory. Images can be stabilized mechanically with optics mounted on the eye itself, or the eye can be braced mechanically so that its motion is drastically reduced. High contrast luminance gratings stabilized on the retina with a Purkinje images eyetracker do not disappear completely. This could be due to small errors of stabilization, as small as 8 sec of arc. references Category Eye ... more details
Image Tire pneumatic trail.png thumb right Bike tire contact patch during a right hand turn. Pneumatic trail and trail of the tire are terms used to describe the Bicycle and motorcycle geometry Trail trail like effect generated by compliant tire s rolling on a hard surface and subject to side loads, as in a turn. Causes Pneumatic trail is the distance that the resultant Cornering force force of Slip angle side slip occurs behind the geometric center of the contact patch . It is due to the progressive build up of lateral force along the length of the contact patch, such that lateral forces are greater towards the rear of the contact patch though less so when the rear of the contact patch begins sliding and this creates a torque on the tire called the self aligning torque . Since the direction of the side slip is towards the outside of a turn, the force on the tire is towards the center of the turn. Therefore, this torque tends to turn the front wheel in the direction of the side slip, away from the direction of the turn. ref name Cossalter cite book title Motorcycle Dynamics edition Second last Cossalter first Vittore year 2006 publisher Lulu.com isbn 978 1 4303 0861 4 pages 59 60 ref ref name Smith cite journal url http www.engr.colostate.edu pts Job Understanding 20Parameters 20Influencing 20Tire 20Modeling.pdf title Understanding Parameters Influencing Tire Modeling publisher Formula SAE Platform year 2004 last Smith first Nicholas D. accessdate 2008 11 21 ref ref name Clark cite book title Mechanics of pneumatic tires publisher U.S. Dept. of Transportation, National Highway Traffic Safety Administration, Washington, D.C. year 1981 last Clark first Samuel Kelly url http media.wiley.com product data excerpt 19 04713546 0471354619.pdf ref Variation Pneumatic trail is at its maximum when slip angle is zero and decreases as slip angle increases. Pneumatic trail increases with vertical load. See also Bike physics Tires Bike physics Camber thrust Castor angle Cornering force ... more details
Unreferenced date December 2009 Orphan date December 2009 A pneumatic gripper is a specific type of pneumatic motor pneumatic actuator that typically involves either parallel or angular motion of surfaces that will grip an object. When combined with other pneumatics pneumatic , electric, or hydraulics hydraulic components, the gripper can be used as part of a pick and place system that will allow a component to be picked up and placed somewhere else as part of a manufacturing system. Some grippers act directly on the object they are gripping based on the force of the air pressure supplied to the gripper, while others will use a mechanism such as a gear or toggle to leverage the amount of force applied to the object being gripped. Grippers can also vary in terms of the opening size, the amount of force that can be applied, and the shape of the gripping surfaces frequently called fingers . They can be used to pick up everything from very small items a transistor or chip for a circuit board , for example to very large items, such as an engine block for a car. Grippers are frequently added to industrial robots in order to allow the robot to interact with other objects. Common industrial pneumatic components include pneumatic direct operated solenoid valve pneumatic pilot operated solenoid valve pneumatic external piloted solenoid valve pneumatic manual valve pneumatic valve with air pilot actuator pneumatic filter pneumatic pressure regulator pneumatic lubricator pneumatic pressure switch pneumatic manual OSHA type lock out and dump valve pneumatic solenoid dump valve pneumatic pressure vessel pneumatic rodless cylinder pneumatic gripper pneumatic rotary actuator pneumatic fitting pneumatic flow control pneumatic quick exhaust valve pneumatic pressure booster pneumatic polyurethane Tubing material tubing pneumatic quick disconnect DEFAULTSORT Pneumatic Gripper Category Actuators Category Fluid dynamics de Pneumatik es Aire comprimido fa fr Pneumatique he ... more details
Unreferenced date October 2006 Orphan date November 2009 The pneumatic lubricator is a device which injects an aerosolized stream of oil into the airline. This is used to provide lubrication for internal working parts of pneumatic tools and components such as actuating cylinders, valves and motors. DEFAULTSORT Pneumatic Lubricator Category Pneumatic tools tool stub ... more details
A pneumatic hammer may refer to a Pneumatic hammer forging , a pneumatically driven forging hammer Jackhammer , a pneumatically driven tool used to break up rock and pavement Rivet gun , a pneumatically powered too used to set rivets See also Air hammer disambig ... more details
distinguish Swim bladder A pneumatic bladder is an inflatable pneumatic bag technology with many applications. Emergency management applications Pneumatic bladders are used to seal drains and ducts to contain chemical spills or gases. Pneumatic bladders are often used for the containment of chemical or oil spills and Firewater fire fighting fire water to prevent them from entering the environment, such as in the form of boom containment boom s, such as oil booms. ref http www.osti.gov bridge servlets purl 663424 yo2o1P webviewable 663424.pdf ref Marine applications File FEMA 17992 Photograph by Robert Kaufmann taken on 10 26 2005 in Louisiana.jpg thumb Grounded freighter after Hurricane Katrina , being salvaged using pneumatic bladders to raise and roll it back into the water Deleted image removed File RB divers.jpg thumb left Reef ball being deployed The Reef Ball Foundation uses a pneumatic bladder technology to float an artificial coral reef reef ball into location, then deflate the bladder to sink the reef to the bottom. Other applications Pneumatic bladders, known as dunnage bag s, are used to stabilize cargo within a container. Pneumatic bladders are used in medical research. ref PMID 2065148 ref See also Balloon Bladder Bladder disambiguation References reflist industry stub Category Marine salvage operations Category Environmental engineering ... more details
A pneumatic circuit is an interconnected set of components that convert compressed gas usually air into mechanical work . In the normal sense of the term, the circuit must include a compressor or compressor fed tank. Active components Gas compressor Compressor Transmission lines Pressure vessel Air tank Pneumatic hoses Open atmosphere for returning the spent gas to the compressor Valve s Passive components Pneumatic cylinder s The following devices operate using compressed gases, but are not normally thought of as being pneumatic circuits Gun s Rocket s Refrigerator s Internal combustion engine s Scuba set s See also Circuit theory Fluidics External links http www.pinomatik.com pneumatic reciprocating circuit Category Pneumatics fluiddynamics stub es Circuito neum tico ... more details
Image Hales Stephen trough detail.jpg right thumb upright Pnumatic trough, as invented by Stephen Hales A pneumatic trough is a piece of laboratory apparatus used for collecting gases, such as hydrogen , oxygen , and nitrogen . Pneumatic troughs require a liquid such as water. Scientists also have used mercury in pneumatic troughs, but usually only for the collection of water soluble gases. Health and safety issues surrounding mercury generally prohibit its use in modern day pneumatic troughs. Four items are required for gas collection with a pneumatic trough The trough itself, which is a large glass dish or a similar container A gas bottle or bulb , to hold the gas collected A way to support the gas bottle or bulb, such as a Beehive shelf or a hanger see picture A liquid in the trough The bottle is filled with water, inverted, and placed into the pneumatic trough already containing water. The outlet tube from the gas generating apparatus is inserted into the opening of the bottle so that gas can bubble up through it, displacing the water within. See also File Priestley Joseph pneumatic trough.jpg thumb right Pneumatic trough, and other equipment, used by Joseph Priestley Beehive shelf Pneumatic chemistry Joseph Priestley Stephen Hales Further reading cite journal author Parascandola, John coauthors Ihde, Aaron title History of the Pneumatic Trough journal Isis year 1969 volume 60 pages 351 361 url doi 10.1086 350503 Category Laboratory equipment chemistry stub de Pneumatische Wanne ... more details
Orphan date February 2009 A pneumatic larynx is a device that is used to help a person talk after a laryngectomy . It uses air to produce a humming sound, which is converted to speech by movement of the lip s, tongue , or glottis . External links http www.cancer.gov Templates db alpha.aspx?CdrID 46223 Pneumatic larynx entry in the public domain NCI Dictionary of Cancer Terms NCI cancer dict Category Assistive technology Category Medical technology med stub ... more details
Image pt station.jpg thumb Modern day Pneumatic tube terminal used in factories, supermarkets, banks credit unions and medical facilities Pneumatic tubes or capsule pipelines or Lamson tubes also known as Pneumatic Tube Transport or PTT are systems in which cylindrical containers are propelled through .... Pneumatic tube networks gained great prominence in the late 19th and early 20th century for businesses ... of Medicine accessdate 12 February 2010 ref A small number of pneumatic transportation systems were ... them to move objects through pipes. Pneumatic capsule transportation was originally invented by William ... Center during the Apollo 13 mission. Note pneumatic tube canisters in console to the right. Image Bank pneumatic tubes.jpg thumb left Pneumatic tubes in use at a drive through bank. The technology is still ... by electronic systems, pneumatic tubes are still widely used for transporting small valuable ... States, a large number of drive up banks use pneumatic tubes to transport cash and documents between cars and tellers. Most hospitals have a computer controlled pneumatic tube system to deliver drugs ... s original Mission Control Center NASA Mission Control Center in Houston, Texas had pneumatic tubes ... for the large number of pneumatic tube systems, including a 25 cm diameter system for moving ... system in the parking toll collection system with an outlet at every booth. Pneumatic tube systems ... D.A. year 1998 title Characterization and use of the new NIST rapid pneumatic tube irradiation ... 2011, a McDonald s in Edina, MN claimed on its receipts to be the World s Only Pneumatic Air ... lot. ref cite web url http www.waymarking.com waymarks WMM82 Pneumatic Air Drive Thru McDonalds title Pneumatic Air Drive Thru McDonald s work Waymarking website accessdate 12 February 2010 ref In Britain, the House of Commons telephone and computer exchange also has a pneumatic tube system in place. Citation needed date February 2010 Usages In postal service Anchor Pneumatic post Pneumatic mail ... more details
Unreferenced date June 2008 A pneumatic weapon is a weapon that fires a projectile by means of air pressure , similar in principle to the operation of pneumatic tube delivery systems. The term comes from a Greek word for wind or breath . Comparison with firearms In theory, pneumatic weapons have certain advantages over traditional firearms The ammunition can be much simpler and thus more compact and lighter for the same payload , because there is no need for a propellant or casing the entire round becomes the projectile. Since no propellant is fired, there is no chemical residue to accumulate in the barrel or chamber. Because there is no casing to eject, it is theoretically possible to have a higher rate of repeat fire. The barrel is not heated to nearly the same extent as with a firearm. In practice, pneumatic weapons are not as well developed as traditional firearms and have a number of practical deficiencies The weapon has to supply or be supplied with a source of very high pressure air, such as a Gas compressor compressor , which adds substantial complexity and weight to the weapon. The action , or the mechanism by which subsequent rounds are automatically reloaded, must also be powered by the air pressure many modern firearms re use the energy from the propellant to accomplish this see Maxim gun , further reducing the amount of work the weapon itself has to do. Pneumatic weapons in the toy industry The low projectile speed requirement of a toy weapon greatly reduces ... led to widespread adoption of pneumatic firing mechanisms in toy weapons, where a propellant reaction ... industry has produced a number of pneumatic toy weapons, which fire small, lightweight often plastic ... Pneumatic cannon FN 303 Holman Projector Steam cannon Dynamite gun External links http www.crosman air pistol owners forum.com A forum dedicated to Crosman Air pistols DEFAULTSORT Pneumatic Weapon Category Pneumatic weapons Weapon stub de Luftdruckwaffe pl Bro pneumatyczna ru ... more details
Pneumatic tools or air tools are tool s driven by gas, usually compressed air supplied by a gas compressor . Pneumatic tools can also be driven by compressed carbon dioxide CO2 stored in small cylinders allowing for portability. Pneumatic tools are commonly cheaper and safer to run and maintain than their electric power tool counterparts, as well as having a higher power to weight ratio , allowing a smaller, lighter tool to accomplish the same task. Air tools were formerly unpopular in the DIY market, but are becoming increasingly popular, and have always been ubiquitous in industrial and manufacturing settings. Flow represents the quantity of compressed air that passes through a section over a unit of time. It is represented in l min, m3, at the equivalent value in free air in conditions of standard reference atmosphere SRA , i.e. 20 c, 65 of relative humidity, 1013 mbar, in accordance with norms NFE Some common pneumatic tools Air impact wrench Air ratchet Airbrush Jackhammer Pneumatic drill Pneumatic nail gun Sandblasting sandblaster Spray painting Paint sprayer Some common brand names 3M Atlas Copco CompAir Compair Broomwade Ltd Ingersoll Rand Snap on In addition, many house brand s exist, such as those carried at Princess Auto , ref www.summittools.com ref Summit Tools or Harbor Freight Tools . References references Types of tools Power tool manufacturers Category Pneumatic tools Category Tools tool stub hi tt ... more details
Orphan date February 2009 Image Pneumatic barrier.jpg thumb oil terminal with pneumatic barrier A pneumatic barrier is a method of containing oil spill s. Air bubbling through a perforated pipe causes an upward water flow that slows the spread of oil. It can also be used to stop fish from entering water pollution polluted water . A pneumatic barrier is an active as opposed to passive method of waterway oil spill control. An example of a passive method would be a Boom containment containment boom . Method of operation The pneumatic barrier consists of perforated pipe and a compressed air source. Air escaping from the pipe provides a hump of rising water and air which contains the oil spill. Anchors keeping the pipe in a decided spot are helpful. Unique considerations At water current speeds exceeding one foot per second, the pneumatic barrier no longer functions effectively, limiting deployable sites. Environmental issues The release of compressed air in the water adds oxygen to the local environment. This may be particularly useful in an area which has become a Dead zone ecology dead zone due to eutrophication . Controversy Like all active systems of any type, a mechanical failure can result in total failure of protection. External links http www.rpi.edu dept chem eng Biotech Environ Environmental boom.html A term paper on the subject published by Brett M. Durham http stinet.dtic.mil oai oai?&verb getRecord&metadataPrefix html&identifier AD0719278 A U.S. government paper http www.pubs.asce.org WWWdisplay.cgi?0103774 Pneumatic Barrier and Beach Pollution an ASCE paper Category Fluid dynamics Category Pollution de Druckluft lsperre ... more details
Unreferenced date December 2009 Orphan date December 2009 Infobox Album See Wikipedia WikiProject Albums Name Pneumatic Slaughter Type ep Longtype Artist Fear of God Cover Fear of God Pneumatic Slaughter album cover.jpg Released 1991 Recorded Genre Grindcore Length Label Anomie Records br Atrocious Records Producer Reviews Last album This album Next album 1991 7 EP from Fear of God . Recorded live in Switzerland, February 1988. 7 originally released on Atrocious Records, USA. Released by Anomie Records Track listing Running Through the Blood Locked Away A life in Rigorism I ve seen The Two Sides of the Coin Fool s prayer I m Positive Pneumatic Slaughter Pelz lied Under the Chainsaw Controlled by Fear 1990s metal album stub Category 1991 EPs Category Fear of God albums ... more details
Image Boyle air pump.jpg 150px thumb right Robert Boyle s air pump Pneumatic chemistry is a term most closely identified with an area of scientific research of the seventeenth, eighteenth, and early nineteenth centuries. Important goals of this work were an understanding of the physical properties of gases and how they relate to chemical reactions and, ultimately, the composition of matter. Several gases were isolated and identified for the first time during this period in the history of chemistry. Investigations involving pneumatic chemistry are considered significant both for the improvements in laboratory techniques that they involved and the new information obtained about gases, including the Earth s atmosphere. However, an equal if not greater significance is the role pneumatic chemistry played in Dalton s atomic theory and, later still, in helping to understand and measure atomic and molecular masses. Jan Baptist van Helmont 1579 &ndash 1644 is sometimes considered the founder of pneumatic chemistry, coining the word gas and conducting experiments involving gases. ref cite book last Holmyard first Eric John authorlink coauthors title Makers of Chemistry publisher Oxford University Press date 1931 location Oxford pages 121 ref Pneumatic chemists credited with discovering chemical elements include Joseph Priestley , Henry Cavendish , Joseph Black , Daniel Rutherford , and Carl Scheele . Other individuals who investigated gases during this period include Robert Boyle , Stephen Hales , Antoine Lavoisier , and John Dalton . ref cite book last Partington first J. P. title A Short History of Chemistry publisher MacMillan and Company year 1951 edition 2 pages 65 &ndash 151 ref ref cite book last Ihde first Aaron J. title The Development of Modern Chemistry publisher Dover year 1984 pages 32 &ndash 54 originally published in 1964 ref ref cite book last Hudson first John title The History of Chemistry publisher Chapman and Hall year 1992 pages 47 &ndash 60 ref See also Pneumatic ... more details
Orphan date February 2009 The pneumatic otoscope is the standard tool used in diagnosing otitis media . In addition to the pneumatic diagnostic head, a surgical head also is useful. The pneumatic head contains a lens, an enclosed light source, and a nipple for attachment of a rubber bulb and tubing. The head is designed so that when a speculum is attached and fitted snugly into the patient s external auditory canal, an air tight chamber is produced. In some cases, the addition of a small sleeve of rubber tubing at the end of the plastic speculum or use of a rubber tipped speculum helps to avoid trauma and improve the air tight seal.1 Gently squeezing and releasing the rubber bulb in rapid succession permits observation of the degree of eardrum mobility in response to both positive and negative pressure. References http www.or live.com cpi 1556 pdfs slidebook.pdf?moduleID 860991573 20 A View Through Distinguishing Acute Otitis Media From Otitis Media With Effusion THE OTOSCOPE Health care Category Otology Category Medical equipment ar bs Otoskop de Otoskop fr Otoscope nl Otoscoop no Otoskop nn Otoskop pt Otosc pio ... more details
Unreferenced date December 2009 A pneumatic actuator converts energy in the form of compressed air , typically into motion. The motion can be rotary or linear, depending on the type of actuator. Some types of pneumatic actuators include Tie rod cylinders Rotary actuators Grippers Rodless actuators with magnetic linkage or rotary cylinders Rodless actuators with mechanical linkage Pneumatic artificial muscles Speciality actuators that combine rotary and linear motion frequently used for clamping operations Vacuum generators A Pneumatic actuator mainly consists of a piston, a cylinder, and valves or ports. The piston is covered by a diaphragm mechanical device diaphragm , or seal, which keeps the air in the upper portion of the cylinder, allowing air pressure to force the diaphragm downward, moving the piston underneath, which in turn moves the valve Stem valve stem , which is linked to the internal parts of the actuator . Pneumatic actuators may only have one spot for a signal input, top or bottom, depending on action required. Valves require little pressure to operate and usually double or triple the input force. The larger the size of the piston, the larger the output pressure can be. Having a larger piston can also be good if air supply is low, allowing the same forces with less input. These pressures are large enough to crush object in the pipe. On 100 kPa input, you could lift a small car upwards 1,000 lbs easily, and this is only a basic, small pneumatic valve. However, the resulting forces required of the stem would be too great and cause the valve Stem valve stem to fail. This pressure is transferred to the valve stem, which is hooked up to either the valve plug see plug valve , butterfly valve etc. Larger forces are required in high pressure or high flow pipelines ... pressure is evacuated through the out flow. This is called a direct acting process. See also Pneumatic cylinder Pneumatics DEFAULTSORT Pneumatic Actuator Category Actuators pl Si ownik pneumatyczny ru ... more details
Unreferenced date February 2007 The pneumatics spiritual , from Greek Polytonic , spirit were, in gnosticism , the highest order of humans, the other two orders being psychics and hylics . The pneumatic saw himself as escaping the doom of the material world via the secret knowledge. Outsiders could only know these secrets by joining a gnostic group. To be a gnostic is to believe in three planes of existence the pure unknown demiurge , the material world of coitus and comfort, and the pure spiritual realm of ascension or escape. Category Gnosticism Reli stub ... more details
Pneumatic cannon may refer to spud gun M61 Vulcan also hydraulically operated Dynamite gun disambig Short pages monitor This long comment was added to the page to prevent it being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Longcomment. Please do not remove the monitor template without removing the comment as well. ... more details
The Pneumatic Institution also referred to as Pneumatic Institute was a facility for research on the effect of various gases on the human body, established by physician and science writer Thomas Beddoes , in Bristol , England, in 1799. ref name bol cite journal url http www.ncbi.nlm.nih.gov pmc articles PMC1079621 title Breath of life the evolution of oxygen therapy author Grainge, C. journal J R Soc Med. year 2004 month October volume 97 issue 10 pages page 489 ref James Watt and Humphry Davy were early members of the Institution . ref name bol History After Lavoisier had established the role of oxygen in animal perspiration, members of the Lunar Society , such as Joseph Priestley , originated pneumatic medicine , which eventually led to the establishment of the Pneumatic Institution . ref cite journal url http www.ncbi.nlm.nih.gov pmc articles PMC2478430 title Ether Anaesthesia 1842 1900 author Duncum, Barbara M. journal Postgrad Med J. year 1946 month October volume 22 issue 252 pages 280 281 ref Georgiana, Duchess of Devonshire , who was unusually educated about Chemistry, ref name georgina visited Thomas Beddoes in his laboratory in Hope Square, Bristol, in December 1793. ref name georgina He had set it up earlier that year to study possible medical uses of the recently discovered gases. ref name georgina During her second, extended visit, the idea of replacing the existing outpatient facility with a hospital a Medical Pneumatic Institution was first formulated. ref name georgina cite journal url http www.ncbi.nlm.nih.gov pmc articles PMC1296647 title Georgiana, Duchess of Devonshire, and Princess Diana a parallel author Bergman, Norman A. journal J R Soc Med. year 1998 month April volume 91 issue 4 pages 217 219 ref In November 1798, Beddoes rented two buildings at 6 ... 572 573 ref It was at the Pneumatic Institution that Humphry Davy undertook experiments that included ... his son s tuberculosis known as consumption at the time . Citation needed date April 2011 The Pneumatic ... more details
The Pneumatic school of medicine Pneumatics , or Pneumatici , lang el was an ancient school of medicine in Ancient Greek medicine ancient Greece and Medicine in ancient Rome Rome . They were founded in Rome by Athenaeus of Cilicia , in the 1st century AD. The Roman era was a time when the Methodic school had enjoyed its greatest reputation, from which the Pneumatic school differed principally in that, instead of the mixture of primitive atoms , they adopted an active principle of immaterial nature, Pneuma ancient medicine pneuma , or spirit. This principle was the cause of health and disease . It is from Galen that we learn the doctrines of the founder of the Pneumatic school. Doctrines Plato and Aristotle had already laid the foundations of the doctrine of pneuma , for which, Aristotle was the first to describe the ways in which the pneuma is introduced into the body and the sanguineous system. The Stoics developed the theory even more and applied it to the functions of the body. Erasistratus and his successors had made the pneuma act a great part in health and disease. Thus, the theory of the pneuma was not a new one. The Methodic school, however, appears to have done away with much of the theory. The Pneumatic school, in choosing to oppose the Methodic school, adopted a firmly established principle, and chose the Pneuma Stoic pneuma principle of the Stoics. ref Galen, De Differeat Puls. , iii ref They thought that logic was indispensable to medicine, and Galen tells us that the Pneumatic school would rather have betrayed their country than renounce their opinions. ref Galen, De Differeat Puls. , ii ref Athenaeus had also adopted much of the doctrines of the Peripatetics , ref Galen, De Semiae , ii ref and besides the doctrine of the pneuma , he developed the theory of the classical elements elements much more than the Methodic school had done. He recognised in the four elements the positive qualities poiotes of the animal body but he often regarded them ... more details
under construction The pneumatic containers are a new way to collect residues in our cities. They are thought to don t need anybody to collect garbage . These containers use pneumatic energy to carry rubish bags directly to the dump , in a clean and easy way. They resolve problems of space , noise at night , bad smells or the long way from our home to the traditional container . Citizens are worried about bad smells or noises, but the experts ensure it is the cleanest and less stinky form of recycling. File Recojida de la basura.JPG thumb Recojida de la basura Cleaning problems in our cities Up to now, the cities aroun the world have been always polluted and dirty . Nowadays, in modern times, exist different systems of collecting garbage . Although these methods work well, rubish bags , broken glass , and leftover food is expread all along our streets. Experts ensure that it could be the best method for recolect rubish. What is pneumatic containering? The most serious pollution problems are the accumulation of solid waste, which smells bad and can transmite diseases. The more our society improve, the bigger is the amount of waste, so, it has become a necessary tool to avoid this type of pollution. There are two different systems to make posible this cleaning method. Static system This is the most common one. It consists on putting some special mailboxes connected to an underground tube system , which connects these mailboxes with a bigger place, where the waste is clasified easier than in a common waste plant. Vacuum is generated in the tube, so rubish bags travel up to 60 km ... in a strategically situated place, and the truck make the vacuum to collect the bags. Pneumatic containering in Spain The first Spain Spanish experience in pneumatic garbage collection took place ... done, the method will never success. This is the main disadvantage of the pneumatic containering ... web es medio ambiente urbano 2003 04 23 60476.php?page 3 See also Pneumatic cylinder pneumatic tube ... more details
air expanding in an attempt to reach atmospheric pressure . Fail safe mechanisms Pneumatic system s are often ... pneumatic cylinders will vary in appearance, size and function, they generally fall into one of the specific categories shown below. However there are also numerous other types of pneumatic cylinder ... and DACs are the most common types of pneumatic cylinder, the following types are not particularly ..., to 400 mm diameter air cylinders which would impart enough force to lift a car. Some pneumatic ... is pi , approximately equal to 3.14159. Materials The pneumatic cylinders designed for educational use ... glass pistons sliding inside graphite sleeves. See also Pneumatics Fluid power Fluid dynamics Pneumatic ... more details
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