|
PPM America, Inc
PPM may refer to: Business in general * Planned preventive maintenance * Project portfolio management * Public performance measure, UK measure of rail punctuality Organizations * Mauritanian People's Party * Parry People Movers, UK flywheel vehicle manufacturer * Pashtun Tahafuz Movement (PTM), also known as the Pashtun Protection Movement (PPM), a human rights movement in Pakistan for the Pashtun people * '' Partido Popular Monárquico'' (People's Monarchist Party), Portugal * ''Persekutuan Pengakap Malaysia'', the Scouts Association of Malaysia * People's Progressive Movement (Cayman Islands) * Progressive Party of Maldives Science and technology Computing * Pages per minute, a measurement of printing speed * Perl package manager, for software packages *Planted partition model, a special case of Stochastic block model * Portable pixmap format, a Netpbm format * Prediction by partial matching, a data compression technique Medicine * Permanent pacemaker * Persistent pupillary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planned Preventive Maintenance
The technical meaning of maintenance involves functional checks, servicing, repairing or replacing of necessary devices, equipment, machinery, building infrastructure, and supporting utilities in industrial, business, and residential installations. Over time, this has come to include multiple wordings that describe various cost-effective practices to keep equipment operational; these activities occur either before or after a failure. Definitions Maintenance functions can defined as maintenance, repair and overhaul (MRO), and MRO is also used for maintenance, repair and operations. Over time, the terminology of maintenance and MRO has begun to become standardized. The United States Department of Defense uses the following definitions:Federal Standard 1037C and from MIL-STD-188 and from the Department of Defense Dictionary of Military and Associated Terms * Any activity—such as tests, measurements, replacements, adjustments, and repairs—intended to retain or restore a func ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artificial Cardiac Pacemaker
An artificial cardiac pacemaker (or artificial pacemaker, so as not to be confused with the natural cardiac pacemaker) or pacemaker is a medical device that generates electrical impulses delivered by electrodes to the chambers of the heart either the upper atria, or lower ventricles to cause the targeted chambers to contract and pump blood. By doing so, the pacemaker regulates the function of the electrical conduction system of the heart. The primary purpose of a pacemaker is to maintain an adequate heart rate, either because the heart's natural pacemaker is not fast enough, or because there is a block in the heart's electrical conduction system. Modern pacemakers are externally programmable and allow a cardiologist, particularly a cardiac electrophysiologist, to select the optimal pacing modes for individual patients. Most pacemakers are on demand, in which the stimulation of the heart is based on the dynamic demand of the circulatory system. Others send out a fixed rate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Private Placement Memorandum
{{unreferenced, date=October 2015 A prospectus, in finance, is a disclosure document that describes a financial security for potential buyers. It commonly provides investors with material information about mutual funds, stocks, bonds and other investments, such as a description of the company's business, financial statements, biographies of officers and directors, detailed information about their compensation, any litigation that is taking place, a list of material properties and any other material information. In the context of an individual securities offering, such as an initial public offering, a prospectus is distributed by underwriters or brokerages to potential investors. Today, prospectuses are most widely distributed through websites such as EDGAR and its equivalents in other countries. United States In a securities offering in the United States, a prospectus is required to be filed with the Securities and Exchange Commission (SEC) as part of a registration statement. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portable People Meter
The Portable People Meter (PPM), also known as the Nielsen Meter, was a system developed by Arbitron (now Nielsen Audio) to measure how many people are exposed or listening to individual radio stations and television stations, including cable television. The PPM is worn like a pager, and detects hidden audio tones within a station or network's audio stream, logging each time it finds such a signal. There are several parts to the PPM system: *An encoder that inserts the tones subliminally into a station's or broadcast network's airchain via psychoacoustic masking; *A monitor that checks that the encoder is working properly; *The wearable Portable People Meter carried by each panelist; *A base station for each PPM, where each panelist in the household places it overnight to recharge the battery; and *A portable recharger for vacations and other trips away from the home base. The original PPM concept required the base station to be connected to a telephone line to transmit pane ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pepsi Venezuela Music Awards
The Pepsi Venezuela Music Awards ( es, Premios Pepsi Music Venezuela, links=no; PPM) are honors for the best music in Venezuela in various genres. Its first edition took place on 29 March 2012 in Caracas and was broadcast on Venevisión. Since its second edition in 2013, it has been broadcast by Televen. History The Pepsi Music Awards were created to recognize Venezuela's musical talent in all its genres, connecting musicians among themselves, with their fans, and with the general public. Each year, the process begins in October through nominations on the website. After that, nominations close and voting begins with a jury chosen by the Pepsi Music Academy. This culminates with ceremonies that take place in September of the following year. The awards have more than 60 categories in which bands or artists who have worked actively from 1 January to 15 December can be nominated. Each winning artist in a category receives a personalized statuette with their name and the name of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pulse-position Modulation
Pulse-position modulation (PPM) is a form of signal modulation in which ''M'' message bits are encoded by transmitting a single pulse in one of 2^M possible required time shifts. This is repeated every ''T'' seconds, such that the transmitted bit rate is M/T bits per second. It is primarily useful for optical communications systems, which tend to have little or no multipath interference. History An ancient use of pulse-position modulation was the Greek hydraulic semaphore system invented by Aeneas Stymphalus around 350 B.C. that used the water clock principle to time signals. In this system, the draining of water acts as the timing device, and torches are used to signal the pulses. The system used identical water-filled containers whose drain could be turned on and off, and a float with a rod marked with various predetermined codes that represented military messages. The operators would place the containers on hills so they could be seen from each other at a distance. To send a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proton Precession Magnetometer
A proton magnetometer, also known as a proton precession magnetometer (PPM), uses the principle of Earth's field nuclear magnetic resonance (EFNMR) to measure very small variations in the Earth's magnetic field, allowing ferrous objects on land and at sea to be detected. It is used in land-based archaeology to map the positions of demolished walls and buildings, and at sea to locate wrecked ships, sometimes for recreational diving. PPMs were once widely used in mineral exploration. They have largely been superseded by Overhauser effect magnetometers and alkali vapour (cesium, rubidium, and potassium) or helium magnetometers, which sample faster and are more sensitive. Principles of operation A direct current flowing in a solenoid creates a strong magnetic field around a hydrogen-rich fluid (kerosine and decane are popular; water can also be used), causing some of the protons to align with that field. The current is then interrupted, and as protons realign themselves with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PPM Star Catalogue
The PPM Star Catalogue (Positions and Proper Motions Star Catalogue) is the successor of the SAO Catalogue. It contains precise positions and proper motions of 378,910 stars on the whole sky in the J2000/FK5 coordinate system. It is designed to represent as closely as possible the IAU (1976) coordinate system on the sky, as defined by the FK5 star catalogue. Thus, the PPM is an extension of the FK5 system to higher star densities and fainter magnitudes. Description The PPM can be considered a replacement of two preceding astrometric catalogs which served a similar purpose: AGK3 and the SAO Catalog. In contrast to the PPM, these older catalogs are based on (1) the now obsolete FK4 system of positions and proper motions, and (2) only two position measures per star. While the SAO catalog is more or less complete to V=9, with 4,503 stars fainter than V=10, the PPM catalog is fairly complete to V=9.5, with 102,672 stars fainter than V=10 and 22,395 stars fainter than V=11. Released af ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peak Programme Meter
A peak programme meter (PPM) is an instrument used in professional audio that indicates the level of an audio signal. Different kinds of PPM fall into broad categories: *True peak programme meter. This shows the peak level of the waveform no matter how brief its duration. *Quasi peak programme meter (QPPM). This only shows the true level of the peak if it exceeds a certain duration, typically a few milliseconds. On peaks of shorter duration, it indicates less than the true peak level. The extent of the shortfall is determined by the 'integration time'. *Sample peak programme meter (SPPM). This is a PPM for digital audio. It shows only peak sample values, not true waveform peaks (which may fall between samples and be up to 3 dB higher in amplitude). It may have either a 'true' or a 'quasi' integration characteristic. *Over-sampling peak programme meter. This is a sample PPM that first oversamples the signal, typically by a factor of four, to alleviate the problems of a bas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Dioxide In Earth's Atmosphere
Carbon dioxide in Earth's atmosphere is a trace gas that plays an integral part in the greenhouse effect, carbon cycle, photosynthesis and oceanic carbon cycle. It is one of several greenhouse gases in Earth's atmosphere that are contributing to climate change due to increasing emissions of greenhouse gases from human activities. The current global average concentration of CO2 in the atmosphere is 421 ppm as of May 2022. This is an increase of 50% since the start of the Industrial Revolution, up from 280 ppm during the 10,000 years to the mid-18th century. The increase is due to human activity. Burning fossil fuels is the main cause of these increased CO2 concentrations and also the main cause of climate change.IPCC (2022Summary for policy makersiClimate Change 2022: Mitigation of Climate Change. Contribution of Working Group III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change Cambridge University Press, Cambridge, United Kingdom and New York, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parts Per Million
In science and engineering, the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction. Since these fractions are quantity-per-quantity measures, they are pure numbers with no associated units of measurement. Commonly used are parts-per-million (ppm, ), parts-per-billion (ppb, ), parts-per-trillion (ppt, ) and parts-per-quadrillion (ppq, ). This notation is not part of the International System of Units (SI) system and its meaning is ambiguous. Overview Parts-per notation is often used describing dilute solutions in chemistry, for instance, the relative abundance of dissolved minerals or pollutants in water. The quantity "1 ppm" can be used for a mass fraction if a water-borne pollutant is present at one-millionth of a gram per gram of sample solution. When working with aqueous solutions, it is common to assume that the density of water is 1.00 g/mL. Therefore, it is common to equat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pay Per 1000 Impressions
Cost per mille (CPM), also called cost per thousand (CPT) (in Latin, French and Italian, ''mille'' means ''one thousand''), is a commonly-used measurement in advertising. It is the cost an advertiser pays for one thousand views or impressions of an advertisement. Radio, television, newspaper, magazine, out-of-home advertising, and online advertising can be purchased on the basis of exposing the ad to one thousand viewers or listeners. It is used in marketing as a benchmarking metric to calculate the relative cost of an advertising campaign or an ad message in a given medium.American Marketing Association Dictionary. . Retrieved 2012-11-28. The Marketing Accountability Standards Board (MASB) endorses this definition as part of its ongoinCommon Language: Marketing Activities and Metrics Project .http://www.sempo.orgGlossary of Terms. Retrieved 2012-11-28. The "cost per thousand advertising impressions" metric (CPM) is calculated by dividing the cost of an advertising placement by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Parts Per Million")