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Electronics/Frequency Spectrum

This page covers the spectrum of electromagnetic waves.

Properties of Waves

 * A wave is an oscillation, if represented in the plane using a Cartesian coordinate system looks like a sine wave, being the x axis time and the y axis amplitude. Amplitude is the variation of the wave across a given period being the peak the highest point of a wave. The difference between two peaks is a wavelength. Period is the time it takes a wavelength to pass by a point in space. Frequency is the number of waves that pass by in a second.
 * Black bodies - A cavity that absorbs all radiation and emits radiation at a specific frequency.
 * Resonant cavities - A cavity that allows standing waves of a specific frequency.

Sound
Sound is heard when there are two that things collide with each other. Sound wave is a longitude wave. Sound waves are affected by temperature and atmosphere's pressure

In water sound waves travel faster due to particles being more compressed. In Air, Sound wave pressure creates rare-fraction and rare-compression columns of air

dB scale
DB Scale is used to measured the pressure of a Sound

 * 0 dB means normal no sound
 * 20 dB means normal no amplification of sound
 * 40 dB means normal double amplification of sound

Infrasound: < 20 Hz
Sounds of frequency below 20 Hz is called InfraSound can not be heard by human's ears

sound travels the earth so it can be used to detect nuclear blasts and allows whales to communicate for 10,000 miles (sound channel).

can be greater than >120 dB is intensity but not heard by people. associated with avalanches, earthquakes, volcanoes, meteors, the earth groaning, rock concerts, and pipe organs. Intensifies emotions.

Infrasound has some really warped effects on society.

sound that travels the earth

often >120 dB is intensity.

If heard would be a large rumble as loud as a jet engine or gunfire.

At rock concerts they play infrasound. This intensifies emotions. This is one possible reason why people play loud music.

Attraction of pipe organs.

In addition the earth groans. Anyone know the mythological significance of the cry of the earth?

used by whales to communicate as the waves can travel 10,000 miles.

Infrasound appears to heighten emotions and make people nervous and thus has an association with the supernatural such as haunted houses. Since people are emotionally attached to the deceased and go to where they died, when you combine it with infrasound which is associated with chills, is this an explanation for ghosts?

One of the stranger uses of infrasound involves combining an ancient chamber that resonates infrasound with mind altering drugs to induce visions and out of body experiences.

Audible Sound: 20-20,000 Hz
Audible Sound are sound that can be perceived by human's ears. Audible Sounds are sounds in the range of frequencies 20-20,000 Hz

Human's Voice
 * Human's Voice (20-100)-20,000 Hz
 * Older human hearing 20-15,000 Hz

Computer Sound formats
 * MP3 up to 16 kHz
 * Ogg, AAC up to 20 kHz

Animal Sound
 * sonar 50 kHz, 192-200 kHz
 * dolphins 1-164 kHz
 * bats 20 - 115 kHz
 * whale 30-8000 Hz

Music
 * music 20 Hz - 20000 Hz

Telephone
 * phone 200-2000 Hz

Ultrasound: > 20 kHz
Sounds above 20 kHz are called Ultra Sound. Unable to be heard by people, but can be heard by dogs and dolphins.

Light
photons are emitted by a black body. Talk about energy of photons and how far they penetrate.

regulated by ITU In the US, the allocation of these bands is managed by the FCC Federal Standard 1037C and MIL-STD-188.

The VLA telescope array can resolve a &lambda of 8,xxx Hz

Candela
Unit of intensity

(ELF) Extremely low frequency: < 300 Hz

 * ELF is used by the US Navy to communicate with submerged submarines. The extremely high electrical conductivity of seawater shields submarines from most electromagnetic communications. Signals in the ELF frequency range, however, can penetrate much more deeply. The low transmission rate of most ELF communications limits their use as communications channels; generally an ELF signal serves to request that a submarine surface and initiate some other form of contact.

 * One of the difficulties posed when broadcasting in the ELF frequency range is antenna size. In order to transmit internationally using ELF frequencies, an extremely large antenna is required. The US maintains two sites, in Wisconsin and Michigan. Both sites use long power lines as antennae, in multiple strands ranging from 14 to 28 miles long. Considerable amounts of power are generated and emitted by ELF, and there have been some concerns over the possible ecological impact of such signals.

 * See also: TACAMO, HAARP, List of initialisms,

 * Starting at 7.8 Hz there is the Schumann resonance, which is due to the space between the surface of the Earth and the ionosphere. It acts as a resonant cavity fueled by energy from lightning strikes.  Serial Experiments Lain had the idea that the Schumann resonance could be a carrier for a collective consciousness.

(VF) Voice frequency: 300-3000 Hz

 * Voice band. Used to transmit speech. Allocated for telephone. Voice frequency varies from 300-3400 Hz. 4 kHz allocated for for a single voice-frequency including guard bands.

(VLF) Very Low Frequency: 3-30 kHz

 * Very Low Frequency or VLF refers to Radio Frequencies (RF) in the range of 3 - 30 kHz. Since there is not much space in this band of the spectrum, only the very simplest signals are used, such as for radionavigation. Many natural radio emissions, such as whistlers, can be heard in this band.

 * Because VLF can penetrate water to a depth of 20 meters, they are used to communicate with submarines.

 * Lightning generates low frequency radio waves called whistlers. Whistlers have been received from Jupiter showing the presence of lightning there.

 * The dawn chorus is an unexplained electromagnetic phenomenon that occurs most often at sunrise or shortly after, that (with the proper radio equipment) resembles the sound of a massive flock of birds. It is thought to be caused by high-energy electrons that get caught in the Van Allen radiation belts of the Earth's magnetosphere and fall to the Earth's surface in the form of audible radio waves. Dawn choruses occur more frequently during magnetic storms.

 * This phenomenon also occurs during aurorae, when it is termed an auroral chorus.

(LF) Low Frequency: 30-300 kHz

 * Low Frequency or LF (sometimes called longwave) refers to Radio Frequencies (RF) in the range of 30-300 kHz. In Europe, part of the LF spectrum is used for AM broadcast service. In the western hemisphere, its main use is for aircraft beacon, navigation, information, and weather systems.

 * pass through ionosphere
 * can penetrate oceans to 200 meters

 * Long wave is 144 - 351 kHz in Europe, Africa, and Asia. In the Americas, this band is reserved for aeronautical navigation.

 * Longwave radio frequencies are those below 500 kHz, which correspond to wavelengths longer than 600 meters. They have the property of following the curvature of the earth, making them ideal for continuous, continental communications. Unlike shortwave radio, longwave signals do not reflect nor refract using the ionosphere, so there are fewer phase-caused fadeouts.

 * In Europe, North Africa and Asia, longwave radio frequencies between 153 and 281 kHz are used for domestic and international broadcasting. In the Americas, frequencies between 200 and 430 kHz are used for non-directional radio beacons.

 * The frequency of 60 kHz is used by several nations, such as the United States, Germany, England, and Japan, for extremely accurate time and precision frequency signals. Many commercial appliances sold since approximately 2000 have a VLF receiver capable of receiving these signals, which penetrate indoors more effectively than mediumwave or shortwave signals.

 * Radio signals below 50 kHz are capable of penetrating ocean depths to approximately 200 meters. The United States, Russian, British, Swedish, and Indian navies communicate with submarines on these frequencies.

 * Longwave transmitting antennas take up large amounts of space, and have been the cause of controversy in the United States and Europe due to fears over proximity to high-power radio waves.

(MF) Medium Frequency: 300-3000 kHz

 * (AM) Amplitude Modulation radio is from 530 - 1,700 kHz. Also known as medium wave.  Was big from 1900's-1960's

 * AM radio technology is simpler than other types of radio, such as FM radio and DAB. An AM receiver detects the power of the radio wave, and amplifies changes in the power measurement to drive a speaker or earphones. The earliest crystal radio receivers used this principle.

 * AM radio was used for small scale voice and music broadcasts before World War I. The great increase in the use of AM radio came the following decade. The first commercial radio services began on AM in the 1920s. Radio programming boomed during the "Golden Age of Radio." Dramas, comedy and all other forms of entertainment were produced, as well as broadcasts of news and music.

 * Medium wave is by far the most used for commercial radio broadcasting; this is the "AM radio" that most people are familiar with.

 * For the long and medium wave bands, the wavelength is long enough that the wave diffracts around the curve of the Earth by ground wave propagation, giving AM radio, in particular long wave and medium wave at night, a long range.

 * Short wave is used by radio services intended to be heard great distances away from the transmitting station; the far range of short wave broadcasts comes at the expense of lower audio fidelity. The mode of propagation for short wave is different, see High frequency. AM is used mostly for broadcast uses - other shortwave users may use a modified version of AM such as SSB or an AM-compatible version of SSB such as SSB with carrier reinserted.

 * Frequencies between the broadcast bands are used for other forms of radio communication, such as baby monitors, walkie talkies, cordless telephones, radio control, amateur radio etc.

(HF) High Frequency: 3-30 MHz

 * High frequency (HF) radio frequencies are between 3 and 30 MHz. This range is often called shortwave.

 * Short wave is 1,700 - 30,000 kHz, divided into 14/15 "broadcast bands".

 * Since the ionosphere often reflects HF radio waves quite well, this range is extensively used for medium and long range terrestrial radio communication. However, suitability of this portion of the spectrum for such communication varies greatly with a complex combination of factors:

* Sunlight/darkness at site of transmission and reception * Transmitter/receiver proximity to terminator * Season * Sunspot cycle * Solar activity * Polar aurora * Maximum usable frequency * Lowest usable frequency * Frequency of operation within the HF range

 * HF is often used for continuous wave morse code transmissions.

 * See also: VHF, AM radio, Radio propagation

 * Shortwave radio operates between the frequencies of 3000 kHz and 30 MHz (30,000 kHz) and came to be referred to as such in the early days of radio because the wavelengths associated with this frequency range were shorter than those commonly in use at that time. An alternate name is HF, or high frequency.

 * Short wavelengths are associated with high frequencies because there is an inverse relationship between frequency and wavelength.

 * Shortwave frequencies are capable of reaching the other side of the planet by bouncing a signal off the ionosphere. The selection of a frequency to use to reach a target area depends on several factors:

* The distance from the transmitter to the target receiver * Time of day. During the day, higher shortwave frequencies (> 10 MHz) can travel longer distances than lower; at night, this : property is reversed. * Season of the year. * Solar conditions, including the number of sunspots, solar flares, and overall solar activity. Solar flares can prevent the : ionosphere from reflecting or refracting radio waves.

 * Some major users of the shortwave radio band include:

* Domestic broadcasting in countries with a widely dispersed population with few longwave, mediumwave or FM stations serving them * International broadcasting to foreign audiences * Utility stations transmitting messages not intended for a general public, such as aircraft flying between continents, encoded or ciphered diplomatic messages, weather reporting, or ships at sea * Amateur radio operators * Time signal stations

 * The Asia-Pacific Telecommunity estimates that there are approximately 600,000,000 shortwave radio receivers in use in 2002.

 * The World Radiocommunication Conference (WRC), organized under the auspices of the International Telecommunications Union, allocates bands for various services in conferences every few years. The next WRC is scheduled to take place in 2007. At the World Administrative Radio Conference (WARC) in 1997, the following bands were allocated to international broadcasters:

5,900-5,950 kHz 7,300-7,350 kHz (7,100-7,350 kHz outside of the Americas) 9,400-9,500 kHz 11,600-11,650 kHz 12,050-12,100 kHz 13,570-13,600 kHz 13,800-13,870 kHz 15,600-15,800 kHz 17,480-17,550 kHz 18,900-19,020 kHz

 * Shortwave broadcasting channels are allocated with a 5 kHz separation. International broadcasters, however, may operate outside the normal WARC-allocated bands or use off-channel frequencies to attract attention in crowded bands.

 * The power used by shortwave transmitters ranges from less than one watt for some experimental transmissions to 500 kilowatts and higher for intercontinental broadcasters. Shortwave transmitting centers often use specialized antenna designs to concentrate radio energy on a bearing aimed at the target area.

Table of contents [showhide] 1 International broadcasting 2 Amateur radio 3 Shortwave listening 4 Numbers Stations

5 Shortwave radio: the future 1 Shortwave Broadcasts and Music

International broadcasting

See International broadcasting for details on the history and practice of broadcasting to foreign audiences.

Amateur radio

The privilege of operating shortwave radio transmitters for non-commercial purposes is open to licensed amateurs. In the US, they are licensed by the Federal Communications Commission (FCC). U.S. citizens do not need licenses to own or operate shortwave receivers. Recently the FCC has added an amateur radio license which requires no knowledge of Morse code, making it easier for beginners to get involved; however, a working knowledge of Morse code is required to operate on shortwave bands.

Amateur radio operators have made numerous technical advancements in the field of radio and make themselves available to transmit emergency communications when normal communications channels fail. Some amateurs practice operating off the power grid so as to be prepared for power loss.

Shortwave listening

Many hobbyists listen to shortwave broadcasters without operating transmitters. In many cases, the goal is to obtain as many stations from as many countries as possible (DXing); others listen to specialized shortwave utility, or "ute", transmissions such as maritime, naval, aviation, or military signals. Others focus on intelligence signals.

Shortwave listeners, or SWLs, can obtain "QSL" cards from broadcasters or utility stations as trophies of the hobby.

Numbers Stations

Numbers stations are shortwave radio stations of uncertain origin that broadcast streams of numbers, words, or phonetic sounds. Although officially there is no indication of their origin, radio hobbyists have determined that many of them are used by intelligence services as one-way communication to agents in other countries.

Shortwave radio: the future

The development of direct broadcasts from satellites has reduced the demand for shortwave receivers, but there are still a great number of shortwave broadcasters. A new digital radio technology, Digital Radio Mondiale, is expected to improve the quality of shortwave audio from very poor to standards comparable to the FM broadcast band. The future of shortwave radio is threatened by the uprise of power line communication (PLC), where a data stream is transmitted over unshielded power lines. As the frequencies used overlap with the shortwave bands severe distortions make listening to shortwave radio near power lines difficult or impossible.

Shortwave Broadcasts and Music

Some musicians have been attracted to the unique aural qualities of shortwave radio. John Cage employed shortwave radios as live instruments in a number of pieces, and other musicians have sampled broadcasts, used tape loops of broadcasts, or drawn inspiration from the unusual sounds on some frequencies. Karlheinz Stockhausen used shortwave radio in works including Telemusik (1966), Hymnen (1966–67) and Spiral (1968), and Holger Czukay, Pat Metheny, Aphex Twin, Meat Beat Manifesto, and Wilco have also used broadcasts.

(VHF) Very High Frequency: 30-300 MHz/10-1 m

 * Common uses for VHF are FM radio broadcast at 88-108 MHz and television broadcast (together with UHF). VHF is also commonly used for terrestrial navigation systems (VOR in particular) and aircraft communications.

 * UHF and VHF are the most common frequency bands for television.

 * VHF frequencies' propagation characteristics are ideal for short-distance terrestrial communication. Unlike HF frequencies, the ionosphere does not usually reflect VHF radio and thus transmissions are restricted to the local area (and can't interfere with transmissions thousands of kilometres away) It is also less affected by atmospheric noise and interference from electrical equipment than low frequencies. Whilst it is more easily blocked by land features than HF and lower frequencies, it is less bothered by buildings and other less substantial objects than higher frequencies. It was also easier to construct efficient transmitters, receivers, and antennas for it in the earlier days of radio. In most countries, the VHF spectrum is used for broadcast audio and television, as well as commercial two-way radios (such as that operated by taxis and police), marine two-way audio communications, and aircraft radios.

 * The large slice of technically and commercially valuable slice of the VHF spectrum taken up by television transmission has attracted the attention of many companies and governments recently, with the development of more efficient digital television broadcasting standards. In some countries much of this spectrum will likely become available (probably for sale) in the next decade or so (currently scheduled for 2008 in the United States).

 * In the United Kingdom, the authorities chose to develop colour television exclusively on UHF, beginning in the late 1960s. The last British VHF TV transmitters closed down in 1986. VHF band III is now used in the UK for digital audio broadcasting.

FM been around since 1940

42-50 MHz Pre WWII allocation of FM 1940 88-106 MHz Post WWII allocation of FM 1945

FM stereo technology

 * New technology was added to FM radio in the early 1960s to allow FM stereo transmissions, where the frequency modulated radio signal is used to carry stereophonic sound, using the pilot-tone multiplex system.

 * This multiplexes the left and right audio signal channels in a manner that is compatible with mono sound, using a sum-and-difference technique to produce a single "mono-compatible" signal, which has a baseband part that is equal to the sum of the left and right channels (L+R), and a higher-frequency part that is the difference of the left and right channels (L-R) amplitude modulated on a 38 kHz subcarrier. A 19 kHz pilot tone is then added, to allow allow receivers to detect the presence of a stereo-encoded signal.

 * This signal can then be passed through the FM modulation and demodulation process as if it was a monophonic signal, and the stereo signals extracted from the demodulated FM signal by reversing the multiplexing process.

 * Simple mono FM receivers will not extract the left and right signals, but simply reproduce the baseband part of the "mono-compatible" signal. (This relies on the fact that the subcarrier-modulated part of the mono-compatible signal is in a part of the audio spectrum that is inaudible to people, and the pilot tone is a low-intensity tone in a part of the audio spectrum that is inaudible to most people).

 * This backwards compatibility was important, as when the FM stereo system was introduced in the U.S. in the 1960s, mono FM transmissions had been in service since the 1940s, and there was a large installed base of mono receivers that needed to be able to receive stereo broadcasts without any modification.

 * Stereo receivers could automatically switch between "mono" and "stereo" modes based on the presence of the pilot tone. They were also equipped with a notch filter to remove the pilot tone. In poor signal conditions, stereo receivers could also fall back to mono mode, even on a stereo signal, allowing improved signal-to-noise performance in these conditions.

 * The stereo multiplexing system has been further extended to add an extra, even higher frequency, 57 kHz subcarrier, which is used to carry low-bandwidth digital Radio Data System information, allowing digitally controlled radios to provide extra features.

 * FM radio channel assignments in the US

 * In the United States, frequency-modulated broadcasting stations operate in a frequency band extending from 87.8 MHz to 108.0 MHz, for a total of 20.2 MHz. It is divided into 100 channels, each 0.2 MHz wide, designated "channel 200" through "channel 300."

 * To receive a station, an FM receiver is tuned to the center frequency of the station's channel. The lowest channel, channel 200, extends from 87.8 MHz to 88.0 MHz; thus its center frequency is 87.9 MHz. Channel 201 has a center frequency of 88.1 MHz, and so on, up to channel 300, which extends from 107.8 to 108.0 MHz and has a center frequency of 107.9 MHz.

 * Because each channel is 0.2 MHz wide, the center frequencies of adjacent channels differ by 0.2 MHz. Because the lowest channel is centered on 87.9 MHz the tenths digit of the center frequency of any FM station in the United States is always an odd number. FM audio for television channel 6 is broadcast at a carrier frequency of 87.75 MHz, and many radios can tune down this low; a few low-power television stations licensed for channel 6 are operated solely for their right to use this frequency and broadcast only nominal video programming. For the same reason, assignment restrictions between TV stations on channel 6 and nearby FM stations are stringent: there are only two stations in the United States (KSFH and translator K200AA) licensed to operate on 87.9 MHz.

 * FM stations in a market are generally spaced four channels (800 kHz) apart. This spacing was developed in response to problems perceived on the original FM band, mostly due to deficiencies in receiver technology of the time. With modern equipment, this is widely understood to be unnecessary, and in many countries shorter spacings are used. Other spacing restrictions relate to mixing products with nearby television, air-traffic control, and two-way radio systems as well as other FM broadcast stations. The most significant such taboo restricts the allocation of stations 10.6 and 10.8 MHz apart, to protect against mixing products which will interfere with an FM receiver's standard 10.7 MHz intermediate frequency stage.

 * Commercial broadcasting is licensed only on channels 221 through 300, with 200 through 220 being reserved for noncommercial educational broadcasting. In some markets close to the Canadian or Mexican border, such as Detroit, Michigan and San Diego, California, commercial stations operating from those countries target U.S. audiences on "reserved band" channels, as neither Canada nor Mexico has such a reservation.

Mazer = microwave

(UHF) Ultra High Frequency: 300-3000 MHz/100-10 cm
UHF and VHF are the most common frequency bands for television.

UHF frequencies have higher attenuation from atmospheric moisture and benefit less from 'bounce', or the reflection of signals off the ionosphere back to earth, when compared to VHF frequencies. The frequencies of 300-3000 MHz are always at least an order of magnitude above the MUF (Maximum Usable Frequency). The MUF for most of the earth is generally between 25-35 MHz. Higher frequencies also benefit less from ground mode transmission. However, the short wavelengths of UHF frequencies allow compact receiving antennas with narrow elements; many people consider them less ugly than VHF-receiving models

In the United States, UHF stations (broadcast channels above 13) originally gained a reputation for being more locally owned, less polished, less professional, less popular, and for having a weaker signal than their VHF counterparts (channels 2-13). The movie UHF, starring Weird Al Yankovic, parodies this phenomenon. Recently, with the emergence of eight major broadcast television networks, that notion has changed as bigger and bigger media companies seek a bigger slice of the television pie. Many Fox, UPN, WB, and Pax network affiliates broadcast in the UHF band.

As cable television, digital television, and DSS have penetrated the television market, the distinction between VHF and UHF stations has dissipated.

In Australia, UHF was first anticipated in the mid 1970s with channels 28 to 69. The first UHF TV broadcasts in Australia were operated by Special Broadcasting Service (SBS) on channel 28 in Sydney and Melbourne starting in 1980, and translator stations for the Australian Broadcasting Corporation (ABC). The UHF band is now used extensively as ABC, SBS, commercial and community (public access) television services have expanded particularly through regional areas.

Ultra High Frequency A band reserved for television.

(SHF) Super High Frequency: 3-30 GHz/10-1 cm
Microwave

Note: above 300 GHz, the absorption of electromagnetic radiation by Earth's atmosphere is so great that the atmosphere is effectively opaque to higher frequencies of electromagnetic radiation, until the atmosphere becomes transparent again in the so-called infrared and optical window frequency ranges.

Uses

A microwave oven uses a magnetron microwave generator to produce microwaves at a frequency of approximately 2.4 GHz for the purpose of cooking food. Microwaves cook food by causing molecules of water and other compounds to vibrate. The vibration creates heat which warms the food. Since organic matter is made up primarily of water, food is easily cooked by this method.

A maser is a device similar to a laser, except that it works at microwave frequencies. Microwaves are also used in satellite transmissions because this frequency passes easily through the Earth's atmosphere with less interference than higher wavelengths.

Radar also uses microwave radiation to detect the range, speed, and other characteristics of remote objects.

Wireless LAN communication protocols such as IEEE 802.11 and bluetooth also use microwaves in the 2.4 GHz ISM band, although some variants use a 5 GHz band for communication.

Cable TV and Internet access on coax cable as well as broadcast television use some of the lower microwave frequencies.

Microwaves can be used to transmit power over long distances, create a solar array to beam power to earth.

The microwave spectrum is defined as electromagnetic energy ranging from approximately 300 MHz to 1000 GHz in frequency. Most common applications are within the 1 to 40 GHz range.

Microwave Frequency Bands are defined in the table below:

L Band	1 to 2 GHz S Band	2 to 4 GHz C Band	4 to 8 GHz X Band	8 to 12 GHz Ku Band	12 to 18 GHz K Band	18 to 26 GHz Ka Band	26 to 40 GHz Q Band	30 to 50 GHz U Band	40 to 60 GHz V Band	46 to 56 GHz W Band	56 to 100 GHz

For some of the history in the development of electromagnetic theory applicable to modern microwave applications see the following figures:

* Michael Faraday. * James Clerk Maxwell. * Heinrich Hertz. * Nikola Tesla. * Guglielmo Marconi. * Samuel Morse. * Sir William Thomson, later Lord Kelvin. * Oliver Heaviside. * Lord Rayleigh. * Oliver Lodge.

Specific significant areas of research and work developing microwaves and their applications:

Specific work on microwaves Work carried out by	Area of work Barkhausen and Kurz	Positive grid oscillators Hull	Smooth bore magnetron Varian Brothers	Velocity modulated electron beam → klystron tube Randall and Boot	Cavity magnetron

See also: * Home appliances. * Microwave auditory effect. * Radio. * Optics.

The Cosmic Microwave Background Radiation is a form of electromagnetic radiation that fills the whole of the universe. It has the characteristics of black-body radiation at a temperature of 2.726 kelvins. It has a frequency in the microwave range.

CMR and the Big Bang

This radiation is regarded as the best available evidence of the Big Bang (BB) theory and its discovery in the mid-1960s marked the end of general interest for alternatives such as the steady state theory. The CMR gives a snapshot of the Universe when, according to standard cosmology, the temperature dropped enough to allow electrons and protons to form hydrogen atoms, thus making the universe transparent to radiation. When it originated some 300,000 years after the Big Bang—this point in time is generally known as the "last scattering surface"—the temperature of the Universe was about 6000 K. Since then it has dropped because of the expansion of the Universe, which cools radiation inversely proportional to the fourth power of the Universe's scale length.

Features

One of the microwave background's most salient features is a high degree of isotropy. There are some anisotropies, the most pronounced of which is the dipole anisotropy at a level of about 10-4 at a scale of 180 degrees of arc. It is due to the motion of the observer against the CBR, which is some 700 km/s for the Earth.

Variations due to external physics also exist; the Sunyaev-Zel'dovich Effect is one of the major factors here, in which an cloud of high energy electrons scatters the radiation transferring some energy to the CMB photons.

Even more interesting are anisotropies at a level of roughly 1/100000 and on a scale of a few arc minutes. Those very small variations correspond to the density fluctuations at the last scattering surface and give valuable information about the seeds for the large scale structures we observe now. These density fluctations arise because different parts of the universe are not in contact with each other.

In addition, the Sachs-Wolfe effect causes photons from the Cosmic microwave background to be gravitationally redshifted. These small-scale variations give observational constraints on the properties of universe, and are therefore one important test for cosmological models.

Detection, Prediction and Discovery

The CBR was predicted by George Gamow, Ralph Alpher, and Robert Hermann in the 1940s and was accidentally discovered in 1964 by Penzias and Wilson, who received a Nobel Prize for this discovery. The CBR had, however, been detected and its temperature deduced in 1941, seven years before Gamow's prediction. Based on the study of narrow absorption line features in the spectra of stars, the astronomer Andrew McKellar wrote: "It can be calculated that the 'rotational' temperature of interstellar space is 2 K."

Because water absorbs microwave radiation, a fact that is used to build microwave ovens, it is rather difficult to observe the CMB with ground-based instruments. CMB research therefore makes increasing use of air and space-borne experiments.

Experiments

Of these experiments, the Cosmic Background Explorer (COBE) satellite that was flown in 1989-1996 is probably the most famous and which made the first detection of the large scale anisotropies (other than the dipole). In June 2001, NASA launched a second CBR space mission, WMAP, to make detailed measurements of the anisotropies over the full sky. Results from this mission provide a detailed measurement of the angular power spectrum down to degree scales, giving detailed constraints on various cosmological parameters. The results are broadly consistent with those expected from cosmic inflation as well as various other competing theories, and are available in detail at NASA's data center for Cosmic Microwave Background (CMB) [ed. see links below],

A third space mission, Planck, is to be launched in 2007. Unlike the previous two space missions, Planck is a collaboration between NASA and ESA (the European Space Agency).

CBR and Non-Standard Cosmologies

During the mid-1990's, the lack of detection of anisotropies in the CBR led to some interest in nonstandard cosmologies (such as plasma cosmology) mostly as a backup in case detectors failed to find anisotropy in the CBR. The discovery of these anisotropies combined with a large amount of new data coming in has greatly reduced interest in these alternative theories.

Some supporters of non-standard cosmology argue that the primodorial background radiation is uniform (which is inconsistent with the big bang) and that the variations in the CBR are due to the Sunyaev-Zel'dovich effect mentioned above (among other effects).

(IR) Infared 1 mm-700 nm
Note: above 100 GHz, the absorption of electromagnetic radiation by Earth's atmosphere is so great that the atmosphere is effectively opaque to higher frequencies of electromagnetic radiation, until the atmosphere becomes transparent again in the so-called infrared and optical window frequency ranges.

Infra-red means below red, where red is the color with the longest wavelength.

(FIR) far-IR (30-1000 µm)

(MIR/IIR) mid-IR (5-30 µm) - Infrared radiation is often linked to heat, since objects at room temperature or above will emit radiation mostly concentrated in the mid-infrared band (see black body).

(NIR) near-IR (0.7-5 µm)

However, these terms are not precise, and are used differently in various studies.

Uses Infrared is used in night-vision equipment, when there is insufficient visible light to see an object. The radiation is detected and turned into an image on a screen, hotter objects showing up brighter, enabling the police and military to chase targets. "Night vision"

Smoke is more transparent to infrared than to visible light, so fire fighters use infrared imaging equipment when working in smoke-filled areas. Fire fighters also use this equipment in wood-frame buildings after a fire has been extinguished to look for hot spots behind the walls, where a fire can break out again.

A more common use of IR is in television remote controls. In this case it is used in preference to radio waves because it does not interfere with the television signal. IR data transmission is also employed in short-range communication among computer peripherals and personal digital assistants. These devices usually conform to standards published by IrDA, the Infrared Data Association. Remote controls and IrDA devices use infrared light-emitting diodes (LEDs) to emit infrared radiation which is focused by a plastic lens into a narrow beam. The beam is modulated, i.e. switched on and off, to encode the data. The receiver uses a silicon photodiode to convert the infrared radiation to an electric current. It responds only to the rapidly pulsing signal created by the transmitter, and filters out slowly changing infrared radiation from sunlight, people and other warm objects.

The light used in fiber optic communication is typically infrared.

heat based

not really. EM waves are constantly being emitted by objects, black-body radiation, but the frequency depends on temperature. for room temperature objects and humans, it is mostly below light in the infrared, but for things like fires and red hot iron, it is in the light spectrum more, and for colder and hotter objects it is at different frequencies.

how about this, anything that has at least as much energy as infared will warm things up. Anything that has less will not warm atoms up.

Global Warming Carbon Dioxide absorbs certain wavlengths of infrared light. This is thought to cause global warming.

Visible
1 PetaHz 1015 Hz

Visible light exists on the tip end of infared and just below it is UV. Basically you can almost get a sunburn from visible light.

The optical spectrum (visible light or visible spectrum) is the portion of the electromagnetic spectrum that is visible to the human eye. The optical spectrum is a composite, or mixture, of the various colors.

There are no exact bounds to the optical spectrum ; a light-adapted eye typically has a maximum sensitivity of ~555 nm (in the green). Commonly the response of the eye is considered to cover 380 nm to 780 nm although a range of 400 nm to 700 nm range is more common. The eye may, however, have some visual response at even wider wavelength ranges.

Wavelengths in the range visible to the eye occupy most of the "optical window", a range of wavelengths that are easily transmitted through the Earth's atmosphere.

Note: Ultraviolet and Infrared are often considered to be "light" but are generally not visible to the human eye.

Visible Light

Visible light is electromagnetic radiation that is made of colors of light that the eye can see. This light has wavelengths that are generally expressed in nanometers.

See Rydberg formula.

Vision Rods and cones

People see red, yellow, green, blue and purple

People don't notice the difference because red and purple both have a low intensity.

purple is cut off because the atmosphere absorbs it.

light bulbs

(UV) UltraViolet
Ultra-Violet means beyond violet, where violet is the color with the shortest wavelength.

It is colloquially called black light, as it is invisible to the human eye.

The sun emits ultraviolet light in the UV-A, UV-B, and UV-C bands

Ordinary glass is transparent to UV-A but is opaque to shorter wavelengths. This is why people don't get sunburns in cars. During the first nuclear blast, Feynman was the only person who saw it because he looked through a window. Quartz glass, depending on quality, can be transparent even to vacuum UV wavelengths.

Table of contents [showhide] 1 Health effects 2 Astronomy 3 Uses 3.1 Fluorescent lamps 3.2 Disinfecting drinking water 3.3 Analyzing minerals 3.4 Sterilization 3.5 Resolution 3.6 Spectroscopy 3.7 Photolithography 3.8 Other 4 References

Health effects

In general, UV-A is the least harmful, but can contribute to the aging of skin, DNA damage and possibly skin cancer. It penetrates deeply and does not cause sun burn. Because it does not cause reddenning of the skin (erythema) it can not be measured in the SPF testing. There is no good clinical measurement of the blocking of UVA radiation, but it is important that your sunscreen block both UVA and UVB.

High intensities of UV-B light are hazardous to the eyes, and exposure can cause welder's flash (photokeratitis or arc eye).

UVA, UV-B and UV-C all can damage collagen fibers and thereby accelerate aging of the skin.

Tungsten-Halogen lamps have bulbs made of quartz, not of ordinary glass. Tungsten-Halogen lamps that are not filtered by an additional layer of ordinary glass are a common, useful, and possibly dangerous, source of UV-B light.

UV-A light is known as "dark-light" and, because of its longer wavelength, can penetrate most windows. It also penetrates deeper into the skin than UV-B light and is thought to be a prime cause of wrinkles.

UV-B light in particular has been linked to skin cancers such as melanoma. The radiation ionizes DNA molecules in skin cells, causing covalent bonds to form between adjacent thymine bases, producing thymidine dimers. Thymidine dimers do not base pair normally, which can cause distortion of the DNA helix, stalled replication, gaps, and misincorporation. These can lead to mutations, which can result in cancerous growths. The mutagenicity of UV radiation can be easily observed in bacteria cultures.

This cancer connection is the reason for concern about ozone depletion and the ozone hole.

UV-C rays are the strongest, most dangerous type of ultraviolet light. Little attention has been given to UV-C rays in the past since they are normally filtered out by the ozone layer and do not reach the Earth. Thinning of the ozone layer and holes in the ozone layer are causing increased concern about the potential for UVC light exposure, however.

As a defense against UV light, the body tans when exposed to moderate (depending on skin type) levels of radiation by releasing the brown pigment melanin. This helps to block UV penetration and prevent damage to the vulnerable skin tissues deeper down. Suntan lotion that partly blocks UV is widely available (often referred to as "sun block" or "sunscreen"). Most of these products contain an "SPF rating" that describes the amount of protection given. This protection applies only to UV-B light. In any case, most dermatologists recommend against prolonged sunbathing.

A positive effect of UV light is that it induces the production of vitamin D in the skin. Grant (2002) claims tens of thousands of premature deaths occur in the U.S. annually from cancer due to insufficient UV-B exposures (apparently via vitamin D deficiency).

Astronomy

In astronomy, very hot objects preferentially emit UV light (see Wien's law). However, the same ozone layer that protects us causes difficulties for astronomers observing from the earth, so most UV observations are made from space. (See UV astronomy, space observatory).

Uses UV light has many various uses:

Fluorescent lamps Fluorescent lamps produce UV light by the emission of low-pressure mercury gas. A phosphorescent coating on the inside of the tubes absorbs the UV and turns it into visible light.

The main mercury emission wavelength is in the UV-C range. Unshielded exposure of the skin or eyes to mercury arc lamps that do not have a conversion phosphor is quite dangerous.

The light from a mercury lamp is predominantly at discrete wavelengths. Other practical UV light sources with more continuous emission spectra include xenon arc lamps (commonly used as sunlight simulators), deuterium arc lamps, mercury-xenon arc lamps, metal-halide arc lamps, and tungsten-halogen incandescent lamps.

Disinfecting drinking water Ultraviolet light is increasingly being used to disinfect drinking water and in waste water treatment plants. Dr. James R. Bolton discovered that ultraviolet light could treat Cryptosporidium, previously unknown. The findings resulted in two US patents and the use of UV light as a viable method to treat drinking water.

Analyzing minerals Ultraviolet lamps are also used in analyzing minerals, gems, and in other detective work including authentication of various collectibles. Materials may look the same under visible light, but fluoresce to different degrees under ultraviolet light; or may fluoresce differently under short wave ultraviolet versus long wave ultra violet. UV fluorescent dyes are used in many applications (for example, biochemistry and forensics). The fluorescent protein Green Fluorescent Protein (GFP) is often used in genetics as a marker. Many substances, proteins for instance, have significant light absorption bands in the ultraviolet that are of use and interest in biochemistry and related fields. UV-capable spectrophotometers are common in such laboratories.

Sterilization Ultraviolet lamps are used to sterilize workspaces and tools used in biology laboratories and medical facilities. Since microorganisms can be shielded from ultraviolet light in small cracks and other shaded areas, however, these lamps are used only as a supplement to other sterilization techniques.

Resolution Ultraviolet light is used for very fine resolution photolithography, as required for manufacture of semiconductors.

Spectroscopy UV light is often used in UV-visible spectroscopy

Photolithography UV light is used extensively in the electronics industry in a procedure known as photolithography, where a chemical known as a photoresist is exposed to UV light which has passed through a mask. The light allows chemical reactions to take place in the photoresist, and after development (a step that either removes the exposed or unexposed photoresist), a geometric pattern which is determined by the mask remains on the sample. Further steps may then be taken to "etch" away parts of the sample with no photoresist remaining.

It is photolithography which is primarily used to create integrated circuit components and printed circuit boards.

Other The onset of vacuum UV, 200 nm, is defined by the fact that ordinary air is opaque below this wavelength. This opacity is due to the strong absorption of light of these wavelengths by oxygen in the air. Pure nitrogen (less than about 10 ppm oxygen) is transparent to wavelengths in the range of about 150-200 nm. This has wide practical significance now that semiconductor manufacturing processes are using wavelengths shorter than 200 nm. By working in oxygen-free gas, the equipment does not have to be built to withstand the pressure differences required to work in a vacuum. Some other scientific instruments, such as Circular Dichroism spectrometers, are also commonly nitrogen purged and operate in this spectral region.

It is advisable to use protective eyewear when working with ultraviolet light, especially short wave ultraviolet. Ordinary eyeglasses give some protection. Most plastic lenses give more protection than glass lenses. Some plastic lens materials, such as polycarbonate, block most UV. There are protective treatments available for eyeglass lenses that need it to give better protection. The most important reason that ordinary eyeglasses only give limited protection, however, is that light can reach the eye without going through the lens. Full coverage is important if the risk from exposure is high. Full coverage eye protection is usually recommended for high altitude mountaineering, for instance. Mountaineers are exposed to higher than ordinary levels of UV light, both because there is less atmospheric filtering and because of reflection from snow and ice.

Some insects, such as bees, can see into the near ultraviolet, and flowers often have markings visible to such pollinators.

UV catastrophe

at wavelengths just below visible is where people get sunburns.

sun burn rating UV-A UV-B UV-C

UV bulbs

X-Ray: 30 PetaHz - 60 ExaHz/10 nanometer - 5 picometer
(German: Röntgenstrahlen)

Soft X-ray: (10-0.1 nm)

Hard X-ray: (100-5 pm)Low energy gamma rays

X-rays are generated by electron collisions.

X-rays are primarily used for diagnostic medical imaging and crystallography.

Physicist Johann Hittorf observed tubes with energy rays extending from a negative electrode. These rays produced a fluorescence when they hit the glass walls of the tubes. In 1876 the effect was named "cathode rays" by Eugene Goldstein. Later, English physicist William Crookes investigated the effects of energy discharges on rare gases. He constructed what is called the Crookes tube. It is a glass vacuum cylinder, containing electrodes for discharges of a high voltage electric current. He found, when he placed unexposed photographic plates near the tube, that some of them were flawed by shadows, though he did not investigate this effect. In 1892, Heinrich Hertz began experimenting and demonstrated that cathode rays could penetrate very thin metal foil (such as aluminum). Philip Lenard, a student of Heinrich Hertz, further researched this effect. He developed a version of the cathode tube and studied the penetration of X-rays through various materials. Philip Lenard, though, did not realize that he was producing X-rays.

In April 1887, Nikola Tesla began to investigate X-rays using his own devices as well as Crookes tubes. Tesla did this by experimenting with high voltages and vacuum tubes. From Nikola Tesla's technical publications, it is indicated that he invented and developed a special single-electrode X-ray tube. Tesla's tubes differ from other X-ray tubes in that they have no target electrode. He stated these facts in his 1897 X-ray lecture before the New York Academy of Sciences. The modern term for this process is the bremsstrahlung process, in which a high-energy secondary X-ray emission is produced when charged particles (such as electrons) pass through matter. By 1892, Tesla performed several such experiments; however, he did not categorize the emissions as what was later called X-rays (generalizing the phenonomena as radiant energy). Tesla did not publicly declare his findings nor did he make them widely known. His subsequent X-ray experimentation by vacuum high field emissions led him to alert the scientific community to the biological hazards associated with X-ray exposure.

Hermann von Helmholtz formulated mathematical equations for X-rays. He postulated a dispersion theory before Roentgen made his discovery and announcement. It was formed on the basis of the electromagnetic theory of light (Wiedmann's Annalen, Vol. XLVIII); however, he did not work with actual X-rays.

On November 8, 1895, Wilhelm Röntgen, a German scientist, began observing and further documenting X-rays while experimenting with vacuum tubes. Röntgen, on December 28, 1895, wrote a preliminary report "On a new kind of ray: A preliminary communication". He submitted it to the Würzburg's Physical-Medical Society journal. This was the first formal and public recognition of the categorization of X-rays. Röntgen referred to the radiation as "X", to indicate that it was an unknown type of radiation. The name stuck, although (over Röntgen's great objections), many of his colleagues suggested calling them Röntgen rays. They are still referred to as Röntgen rays in some countries. Roentgen received the first Nobel Prize in Physics for his discovery.

In 1895, Thomas Edison investigated materials' ability to fluoresce when exposed to X-rays. He found that calcium tungstate was the most effective substance. Around March 1896, the fluoroscope he developed became the standard for medical X-ray examinations. Nevertheless, Edison dropped x-ray research around 1903 after the death of Clarence Madison Dally, one of his glassblowers. Dally had a habit of testing X-ray tubes on his hands, and acquired a cancer in them so tenacious that both arms were amputated in a futile attempt to save his life.[1]

In 1906, physicist Charles Barkla discovered that X-rays could be scattered by gases, and that each element had a characteristic X-ray. He won the 1917 Nobel prize for this discovery.

The use of X-rays for medical purposes was pioneered by Major John Hall-Edwards in Birmingham, England. In 1908, he had to have his left arm amputated owing to the spread of X-ray dermatitis.

Detectors

The detection of X-rays is based on various methods. Most commonly known is the photographic plate as we know them from hospitals. Initially, most common detection was based on the ionisation of gasses. One of the most simple examples is the Geiger counter. Since the 1990-ies, new detectors were developed based on semiconductors. In the semiconductor, the X-ray photon was converted to electron-hole pairs which were collected to detect the X-ray

See also

* X-ray crystallography * X-ray Astronomy * X-ray machine * Geiger counter

Used to take photographs.

Gamma: Above 60 exahertz/Below 5 picometers
Gamma rays (often denoted by the Greek letter gamma, γ) are an energetic form of electromagnetic radiation (see Electromagnetic spectrum) produced by radioactivity or other nuclear or subatomic processes such as electron-positron annihilation. Gamma rays are more penetrating than either alpha or beta radiation, but less ionizing. Gamma rays are distinguished from X rays by their origin. Gamma rays are produced by nuclear transitions while X-rays are produced by energy transitions due to accelerating electrons. Because it is possible for some electron transitions to be of higher energy than nuclear transition, there is an overlap between low energy gamma rays and high energy X-rays.

Nuclear processes Radioactive decay processes

* Alpha decay * Beta decay * Electron capture * Gamma radiation * Neutron emission * Positron emission * Proton emission * Spontaneous fission

Nucleosynthesis

* Neutron Capture o The R-process o The S-process * Proton capture: o The P-process

Shielding for γ rays requires large amounts of mass. Shields that reduce gamma ray intensity by 50% include 1 cm (0.4 inches) of lead, 6 cm (2.4 inches) of concrete or 9 cm (3.6 inches) of packed dirt.

Gamma rays from nuclear fallout would probably cause the largest number of casualties in the event of the use of nuclear weapons in a nuclear war. An effective fallout shelter reduces human exposure at least 1000 times.

Gamma rays are less ionising than either alpha or beta rays. However, reducing human danger requires thicker shielding. They produce damage similar to that caused by X-rays such as burns, cancer, and genetic mutations.

In terms of ionization, gamma radiation interacts with matter via three main processes: the photoelectric effect, Compton scattering, and pair production.

Photoelectric Effect: This describes the case in which a gamma photon interacts with and transfers all of its energy to an orbital electron, ejecting that electron from the atom. The kinetic energy of the resulting photoelectron is equal to the energy of the incident gamma photon minus the binding energy of the electron. The photoelectric effect is thought to be the dominant energy transfer mechanism for x-ray and gamma ray photons with energies below 50 keV (thousand electronvolts), but it is much less important at higher energies.

Compton Scattering: This is an interaction in which an incident gamma photon loses enough energy to an orbital electron to cause its ejection, with the remainder of the original photon's energy being emitted as a new, lower energy gamma photon with an emission direction different from that of the incident gamma photon. The probability of Compton scatter decreases with increasing photon energy. Compton scattering is thought to be the principal absorption mechanism for gamma rays in the intermediate energy range 100 keV to 10 MeV (million electronvolts), an energy spectrum which includes most gamma radiation present in a nuclear explosion. Compton scattering is relatively independent of the atomic number of the absorbing material.

Pair Production: By interaction in the vicinity of the coulomb force of the nucleus, the energy of the incident photon is spontaneously converted into the mass of an electron-positron pair. A positron is a positively charged electron. Energy in excess of the equivalent rest mass of the two particles (1.02 MeV) appears as the kinetic energy of the pair and the recoil nucleus. The electron of the pair, frequently referred to as the secondary electron, is densely ionizing. The positron has a very short lifetime. It combines within 10−8 second with a free electron. The entire mass of these two particles is then converted into two gamma photons of 0.51 MeV energy each.

Gamma rays are often produced alongside other forms of radiation such as alpha or beta. When a nucleus emits an α or β particle, the daughter nucleus is sometimes left in an excited state. It can then jump down to a lower level by emitting a gamma ray in much the same way that an atomic electron can jump to a lower level by emitting ultraviolet radiation.

Gamma rays, x-rays, visible light, and UV rays are all forms of electromagnetic radiation. The only difference is the frequency and hence the energy of the photons. Gamma rays are the most energetic. An example of gamma ray production follows.

First cobalt-60 decays to excited nickel-60 by beta decay:

Then the nickel-60 drops down to the ground state (see nuclear shell model) by emitting a gamma ray:

Uses:

The powerful nature of gamma-rays have made them useful in the sterilising of medical equipment by killing bacteria. They are also used to kill bacteria in foodstuffs to keep them fresher for longer.

In spite of their cancer-causing properties, gamma rays are also used to treat some types of cancer. In the procedure called gamma-knife surgery, multiple concentrated beams of gamma rays are directed on the growth in order to kill the cancerous cells. The beams are aimed from different angles to focus the radiation on the growth while minimising damage to the surrounding tissues.

See also: physics, gamma-ray astronomy, gamma ray bursters, radiation therapy.

anything above

Highly energetic photons associated with black holes and galaxies also emitted by nuclear blasts

causes cellular death

Black holes are known to emit gamma ray bursts through their poles.

A large enough gamma ray burst could sterilize all life on earth.

title: Electronics/Frequency Spectrum


text:
Talk:Denis Blundell

Cricket (conflicting references)
The claim "represented New Zealand at international level" comes from the Governor-General biography. The profile on cricinfo shows he represented Cambridge University and Wellington at First Class level, but no evidence that he ever represented New Zealand. Cricinfo, which has extensive archives of international cricket matches, has to be considered a more authoritative reference for this point. Editing article accordingly. --Zaqrfv (talk) 02:12, 28 August 2008 (UTC)

Scion of the ancient Lancashire family
Not clear how this is substantiated. The genealogy link provided does not mention Denis or his patrilineal ancestor who moved to NZ. He is the descendent of Henry Blundell, publisher of the Evening Post, who is cited as being born in Dublin with no mention of ancestry.

Henry Blundell (publisher) - Wikipedia <IP_ADDRESS> (talk) 10:22, 22 August 2022 (UTC)

source: wikimedia

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: Talk:Denis Blundell


text:
Nazila Fathi

Nazila Fathi (born December 28, 1970) is an Iranian-Canadian author and former Teheran correspondent for The New York Times. She also reported on Iran for both Time and Agence France-Presse. In her book The Lonely War, she interweaves her personal history with that of Iran, from the 1979 Revolution until, when continuing to report from Iran became life-threatening in 2009, she was forced into exile.

Biography
Fathi was born in Tehran in 1970. Her father was a senior civil servant in the Ministry of Energy. She studied English at Azad University, and while there began working as a translator for foreign reporters. From that beginning she became a stringer for The New York Times, Time, and Agence France-Presse.

Frustrated by the Iranian government's multi-year press accreditation process, Fathi moved to Canada in 1999 and became a Canadian citizen. She earned an MA in political science and women's studies from the University of Toronto in 2001 before returning to Tehran as a correspondent for The New York Times.

During the 2009 Iranian presidential election protests, Fathi and other journalists reported on the violence by the Iranian government against peaceful protestors. In early 2009, the Iranian government banned international journalists from stopping coverage of the protests, but Fathi continued to report. In June 2009, other journalists were arrested by Iranian authorities. Fathi was placed under surveillance by the government, and threats were made against her life. In July 2009, she and her family left Iran for Canada.

She subsequently became an associate at Harvard's Belfer Center, a Nieman Fellow and a Shorenstein Fellow.

Fathi's book The Lonely War was published by Basic Books in November 2014. Fathi also translated Nobel Laureate Shirin Ebadi's book, The History and Documentation of Human Rights in Iran.

Nonfiction

 * Lonely War: One Woman's Account of the Struggle for Modern Iran (2014)

Children's books

 * My Name Is Cyrus (2020)
 * Avicenna: The Father of Modern Medicine (2020)
 * Razi: The Man Who Discovered How to Make Alcohol (2021)
 * The Persian Warrior and Her Queen (2021)

title: Nazila Fathi


text:
User:Wtpillars/sandbox

Article Evaluation
Article of choice: Speech community

Is everything in the article relevant to the topic?
For the article Speech community, all the information from the article seemed to be directly tied to the concept, or people who have helped shaped the concept of a speech community. The page was also set up very well, there was never a moment while reading the article where I felt that something did not belong.

Is the article Neutral?
Being that the article is related to the concept of speech communities, the article does not really show any bias. The only point that I would mention would be that the editors of the article make the statement that Speech communities are seen as dated, and the term has mostly been replaced by the community of practice. This statement is accurate, but as discussed in the discussion, both can still be used, the community of practice has not yet been completely abandoned. Is there viewpoints that are over-represented, or underrepresented? As stated in the previous point, the decision to say that communities of practice have been largely abandoned seems to be an over-representation. Other than that however, the article's editors have done a pretty decent job of getting information about different definitions.

Citations?
The citations that are available seem accurate, however there are a few bits of information that need to be cited, as there is just information without any source to back up rather it is indeed true. This problem is the biggest problem I have with the article, as without the sources it can be hard to believe if the information is accurate or not.

Out of date information?
While reading the article I have noticed the article has been edited quite heavily, even going back to just last month, so with that in mind I feel that the information is up to date.

Talk page and overall grade.
The talk page shows two comments, both of which were from 2007. Both criticized the article for not being accurate, and one did clean up for the article before stating that it needed a complete redo. The grade that it has is a C for its quality scale, and the article is a part of wiki projects.

How does it compare to class?
The article seems pretty accurate to what was talked in class, it is missing a lot of the fine details that were brought up in the oral presentations, but other than that the information seems pretty consistent with what was discussed.

Choosing a Topic
My article was Claire Bowern, and the changes that I added to the talk page are as follows:

The stub has a lot that can be added that will make it a much better article. The first change would be adding some background information on Claire Bowern, or at least have some more information about her life as to give the article some base knowledge. In addition to this, going through some of her works to get a sense of what she thinks about certain topics and add a section that maybe posts some of her findings in her field.

Bibliography: Haynie, H., Bowern, C., LaPalombara, H. (2014) Sound symbolism in the languages of Australia, PLoS ONE, 9(4), 1-16. doi:10.1371/journal.pone.0092852 Bowern, C. (2010). Historical Linguistics in Australia: trees, networks and their implications. Philosophical Transactions of the Royal Society B: Biological Sciences, 365(1559), 3845-3854. Bowern, C. (2012). The riddle of Tasmanian Languages. Proceedings of the Royal Society B: Biological sciences, 279(1747), 4590-4595. doi:10.1098/rspb.2012.1842.\

Ways to Improve the Article
Create a current section: a section that details what she is doing currently.

Create a section that deals directly with her research instead of just listing sources.

I would add Claire Bowern is researching Pama-Nyungan “border” areas. I would also add that she maintains the Chirila data base of Australian languages, and that most of her research comes from it. I'm also going to mention how she is interested in historical linguistics and prehistory in addition to Australian languages. Also mention how she disagrees with Punctuated Equilibrium in regards to Australia, and some points that she made against the model.

Outline

Section 1: similar to how it is now, but with more information about her work in specifics.

Section 2: add this before the publications, this section will be devoted to important findings that Claire Bowern has found through her work.

Section 3: the publications, as well as adding to it the sources I will be using to fill out section 2.

Section 4: Section that deals with Claire Bowern's opinions on Punctuated Equilibrium.

Section 5: A what has she done recently section, give information and context as to what Claire Bowern has been doing for the past couple of years.

Edited Article
Claire Bowern is a linguist who works with Australian indigenous languages.

Bowern received her PhD from Harvard University in 2004 for her research on the historical morphology of complex verb constructions in non-Pama-Nyungan languages. In 2007, the NSF/NEH awarded her a grant to study Bardi Texts from the 1920's. She is currently an associate professor at Yale University, and also serves as the vice president of the Endangered Language Fund. Her teaching at Yale University focuses on research, as she wants her students to be excited about learning, and she wants to make sure her students know how to get away from their preconceived assumptions.

Key publications

 * (2012) Bowern, Claire. A Grammar of Bardi. Mouton de Gruyter.
 * (2011) Bowern, Claire. Sivisa Titan: Sketch Grammar, Texts, Vocabulary Based on Material Collected by P. Josef Meier and Po Minis. University of Hawaii press.
 * (2010) Bowern, Claire and Terry Crowley. An Introduction to Historical Linguistics. Oxford/New York: Oxford University Press. Fourth edition.
 * (2008) Bowern, Claire. Linguistic Fieldwork: A practical guide. Palgrave.
 * (2004) Bowern, Claire and Harold Koch (eds). Australian Languages: Classification and the Comparative Method. Benjamins

Findings

 * There is a network which Karnic languages fell into three groups, northern, central, and eastern. There is also sub-grouping and borrowing occurring in the Karnic subgroup of Pama-Nyungan.
 * According to the article "The Riddle of Tasmanian Languages" There is no evidence that support that Tasmanian languages are related to each other. Nor are they related to indigenous languages from the Mainland of Australia.
 * In the journal "Computational phyolgenetics and the internal structure of the Pama-Nyngan" there is a conclusion that Australian languages are not so exceptional that methods used elsewhere don't work there. The work in this study also allows for studying patterns of language and cultural co-evolution, specifically in hunter-gatherer languages.

Forthcoming Work
Claire Bowern plans to publish a Work on Tasmanian Languages with Tyler Lau. In addition to that she is working on looking at Aspects of Pana-Nyungan with Barry Alpher, Erich Round and others. The final piece she is working on currently is looking into the dynamics of Hunter-gatherer langauge change, which includes examining etymology and ethno-biographical nomenclature.

title: User:Wtpillars/sandbox


text:
Wikipedia:WikiProject Spam/LinkReports/theigadgets.com

Links

 * theigadgets.com resolves to [//<IP_ADDRESS> <IP_ADDRESS>]
 * Link is not on the blacklist.
 * Link is not on the domainredlist.
 * Link is not on the Monitorlist.
 * None of the mentioned users is on the blacklist.
 * Link is not on the whitelist.
 * Link is not on the monitor list.
 * Link is blacklisted by \btheigadgets\.com\b on [//en.wikipedia.org/wiki/Mediawiki:Spam-blacklist en.wikipedia.org]
 * Link is not on the whitelist.
 * Link is not on the monitor list.
 * Link is blacklisted by \btheigadgets\.com\b on [//en.wikipedia.org/wiki/Mediawiki:Spam-blacklist en.wikipedia.org]

Additions

 * Displayed all 10 additions.


text:
Wikipedia:WikiProject Spam/LinkReports/tadalafilcanada-online.xyz

Links

 * tadalafilcanada-online.xyz resolves to [//<IP_ADDRESS> <IP_ADDRESS>]
 * Link is not on the blacklist.
 * Link is not on the domainredlist.
 * Link is not on the Monitorlist.
 * None of the mentioned users is on the blacklist.
 * Link is not on the whitelist.
 * Link would be caught by rule \bxyz\b on the monitor list (Automonitor: reported to en:MediaWiki:Spam-blacklist (diff - )).
 * Link is blacklisted by \bxyz\b on [//en.wikipedia.org/wiki/Mediawiki:Spam-blacklist en.wikipedia.org]
 * Link would be caught by rule \bxyz\b on the monitor list (Automonitor: reported to en:MediaWiki:Spam-blacklist (diff - )).
 * Link is blacklisted by \bxyz\b on [//en.wikipedia.org/wiki/Mediawiki:Spam-blacklist en.wikipedia.org]

Users
No users found.

Additions
No additions recorded.


text:
Talk:Teaching and Learning Online

Recreation of this page
I expanded and restructured this page in August 2008 to act as a coordination centre for everything on Wikiversity relating to the methodology teaching and learning online. I've tried to keep out self-reflective materials about Wikiversity, but added a small section on this, mainly to discourage making self-reflective additions to the main list. I've trawled through Wikiversity pretty thoroughly on the hunt for suitable projects and resources, but I may have missed some. The completion status indicators are rather subjective. Hopefully the completion status indicators will encourage others to adopt or extend stalled projects. --McCormack 14:42, 5 August 2008 (UTC)

eLearning, mLearning, Flexible learning, online learning... all equal Teaching and Learning Online
The jargon may come and go, so in considering the term with the most meaning in the long term, I reckon its teaching and learning online. Eventually, I am sure that the online bit will fade away and it will all be just part and parcel of the normal practice of teaching and learning. By then terms like eLearning and flexi learning will for sure have no relevance. --Leighblackall 11:10, 8 December 2006 (UTC)

"Certification"
I have a problem with your offer of certification. This is not advertising space. This is to be a repository for free information, available to all. We do not intend to offer certification, and others should not be doing so here either. I see you have your certification ad all over the place. Please consider removing that. You write your articles at times in the "I" or "we" form - this should not be the case on the Wikiversity, we have no concept of single author. --WiseWoman 20:50, 11 March 2007 (UTC)

 * Part of what we do at Wikiversity is provide links to learning resources at other websites. Yes, we do not want Wikiversity to be used as a mechanism for advertising businesses, but Wikiversity participants should feel free to link to learning resources at other websites. It is up to the Wikiversity community as a whole to judge what constitutes welcome links to off-site resources and what constitutes unwelcome advertising. These decisions need to be made on a case-by-case basis and with discussion that seeks a fair consensus decision that is in line with the Wikiversity mission. --JWSchmidt 03:17, 14 December 2007 (UTC)

title: Talk:Teaching and Learning Online


text:
Talk:Dick Honig

Wiki Education assignment: Mass Communication
— Assignment last updated by COMStudiesProfessor (talk) 16:14, 11 November 2022 (UTC)

title: Talk:Dick Honig


text:
Latin/Introduction to Verbs (L3)

=Introduction to Verbs=

Verbs in Latin, like verbs in English, are the "action words". "Go", "throw", "kick", "fly", "think", and "be" are all examples of verbs.

Verbs in Latin
Just like nouns, we can tell a lot about a Latin verb by looking at its ending. This is because verbs conjugate (remember, nouns decline). There are four groupings of verbs, called "conjugations". Like the declensions for nouns, each verb conjugation contains a group of verbs with similar endings.

We saw that nouns have three incidents. Verbs, however, have five. As a result, there is a vast number of forms that each verb can take. We'll start slow, of course. First, before we get into talking about verbs themselves, we should talk about what those five incidents are.

Mood
Verbs have three different moods - the indicative, the imperative, and the subjunctive. The indicative, from the word "indicate", is the mood that shows action happening. When Bob kicks a ball, "kicks" is a verb in the indicative because it tells us that something is actually happening. The imperative is a command. If I say to Bob, "Kick the ball", "kick" is in the imperative - I'm telling Bob to kick the ball, the ball isn't actually being kicked yet. Finally, Latin verbs have a subjunctive mood. This usually represents hypothetical action. "Bob might kick the ball" uses "kick" in the subjunctive mood.

We'll learn more about the indicative mood later in this lesson.

Voice
Just as in English, there are two voices that verbs can take. The active voice is used when the subject of a sentence (the nominative case noun) is doing the action. Such as "Bob kicked the ball" - Bob is the subject and he is doing the kicking. But when we say "The ball was kicked by Bob", the ball is the subject of the sentence. The ball isn't doing anything though! In this case, the verb "was kicked" is passive - the subject has something done to it. Note that in English we need to use the auxiliary (helping) verb "was" along with our main verb "kick" to show the passive voice. In Latin, a form of "kick" is used that shows passive voice without needing an auxiliary.

We'll start off by focusing on the active voice.

Tense
We're familiar with tense in English - we can tell the difference between "Bob kicks the ball", "Bob kicked the ball", and "Bob will kick the ball". Those are just a few of the tenses that we use in English - the present, the past, and the future. Latin has a total of six tenses. We'll go into each of the tenses later (starting with the present in this lesson), but for now just know that there are six.

Person
"I kick the ball". "You kick the ball". "Bob kicks the ball". What's the difference in these three sentences? The person of the verb. We all remember from our English classes the different points-of-view that can be used in writing. First person is the use of words that refer to the person speaking (I, me, we, us). Second person refers to the person being spoken to (you). Third person talks about someone else entirely (Julia, Bob, the girl, the poet). Note in the three sentences above the first and second person in English use "kick" while third person uses "kicks" - this is a vestige of the Latin conjugation system. In Latin, each of those three sentences would use a different form of "kick". The person of a verb is determined by the subject of a sentence.

Number
Just like nouns, verbs have number. They can be singular or plural. The number of the verb is determined by the number of the subject of the sentence - if you have a singular subject, you need to use a singular verb. Multiple subjects require a plural verb. In English, we really only see this in the third person ("Bob kicks the ball" vs. "Bob and Julia kick the ball"). However, Latin has two different forms for each person.

=First Conjugation=

The first conjugation is the most regular of the four groupings of verbs. Both of the verbs we used in our last lesson belong to the first conjugation. Can you tell from the sentences what person and number those verbs were? How about tense, voice, and mood?

If you decided that they were third-person singular, you're right. Bonus points for present active indicative. Let's stay with the present active indicative for right now, and take a look at the different endings for person and number.

Present Active Indicative
Present active indicatives are forms of verbs that show a subject doing an action now. They can be translated into English either as simple presents (something happens) or as progressive presents (something is happening).

Note that "you" in English can be singular or plural, so we will distinguish it here as follows: "you" - singular, "y'all" - plural.

The dat should look familiar because we used it in the last lesson. We also used amat. From looking at the chart above, can you guess what the other forms of amat are?

If that's what you came up with, you did well.

Dictionary Entries
The dictionary entry for a Latin verb has four "principle parts". Once we get into the later lessons, you will need all four parts to be able to fully conjugate (i.e., list all the forms of) a verb. For now, only the first two are important. They are the first-person singular present active indicative and the present active infinitive. We'll talk more about infinitives, and why they don't have person or number, later. The dictionary entries for the two verbs we've used so far are:

 * do, dare, --, -- To give.
 * amo, amare, --, -- To love.

The "--"s will be filled in later when we learn the rest of the principle parts.

Stem
Notice anything similar about the two entries? The second part (the infinitive) of each ends in -are. Any time that you see that ending for the infinitive, you will know that the verb is first conjugation. To find the stem of the verb, you simply slash off the -re from the infinitive. This holds true for all four conjugations. What are the stems of our two verbs?

dare --> da- amare --> ama-

Personal Endings
What can we do with this stems? Well, to get each of the person/number combinations we simply add a "personal ending" to the verb's stem. The endings are:

One issue you might notice is in the first-person singular. Take a look at the stem of amare. It is ama-. If we were to add the first-person singular ending to that, we would get ama- + -o = amao. But we know from our dictionary entry that the first-person singular is amo. What's up? In Latin, sometimes certain vowels get "consumed" by other vowels that are stronger. This is what has happened in this case: the -o is a strong enough sound that it simply obliterates the "a" in the stem. Because all first conjugation verbs have stems that end in "a" (remember that for a verb to be first conjugation, the infinitive must end in -are and so cutting the -re will always leave -a-), every first conjugation verb will exhibit this change.

Missing Subjects
Often in Latin, you will see sentences that have no noun in the nominative case. Don't panic; there is still a subject for that sentence. Let's take a look at an example. The sentence "Sapientiam amo" has an accusative (sapientiam) and a verb (amo), but no nominative. You can find the subject by looking at the verb - amo is the first-person singular. There is really only one option for who subject is. It has to be "I" because "I" is the only subject that will use a first-person singular verb ("we" uses a first-person plural"). Therefore, the sentence translates to "I love wisdom".  You can use the same logic easily with second-person verbs as well.  Third-person is a bit trickier because it has more options, but the singular is "he", "she", or "it" and the plural is "they".

Practice
Let's learn a new verb now. How about this one:

 * laudo, laudare, --, -- To praise.

What is the stem? What is the third-person singular? The second-person plural?

=Vocab=

In addition to the three verbs you learned earlier in this lesson, add this one to your memory:

 * culpo, culpare, --, -- To blame

Let's add another couple of nouns as well. How about the proper nouns "Rome" and "Italy"?

 * Roma, -ae, f. Rome
 * Italia, -ae, f. Italy

=Exercises=

 * 1) Romam amo.
 * 2) Puellae poetas culpant.
 * 3) Julia sapientiam dat.
 * 4) Italiam amas.
 * 5) Poetam amatis.
 * 6) Juliam laudamus.

Answers

=Summary=

You now know what a verb is, what conjugation means, and how to conjugate the present active indicative forms of first conjugation verbs. Your noun vocab is expanding, and you've learned your first four verbs. You can translate sentences with subjects, direct objects, and present tense verbs. You can even fill in gaps when the subject of a sentence is missing by looking at the verb.

In the next lesson, we'll learn about the dative case and indirect objects. We'll finally discover to whom Julia is giving those tables!

Lesson 2 - First Declension | Latin | Lesson 4 - Dative Case and Indirect Object

L3 Word List

title: Latin/Introduction to Verbs (L3)


text:
Nawaf al-Fares

Nawaf al-Fares (نواف فارس الصياح) is the former Syrian ambassador to Iraq who defected from the ruling government led by Bashar al-Assad on 11 July 2012 during the Syrian uprising.

Career
Fares was a veteran of Assad's rule and held senior positions as a leading member of Syria's diplomatic corps under the late president Hafez Assad. He served as high-ranking official of the Syrian Regional Branch of the Arab Socialist Ba'ath Party in Deir al Zour province. Additionally, Fares held senior security posts in Syria. He is also a former provincial governor. He served as the governor of three significant governorates, Latakia Governorate (until 2000), Idlib Governorate (appointed in 2000) and Quneitra Governorate.

He was the first Syrian ambassador to Baghdad after thirty years. His term as ambassador to Iraq began on 16 September 2008. He resigned both from the Ba'ath Party and as Syria's ambassador to Iraq on 11 July 2012.

Defection
Al Jazeera reported on 11 July 2012 that Fares had defected from the Syrian government. His defection was considered to be a significant event in regard to the future of the Syrian uprising. On the same day, Fares posted a video statement on Facebook, arguing that Syrian government forces were killing civilians and that he had joined the ranks of the revolution of the Syrian people. He further called for the members of the Syrian military to join this revolution and to save the country and the citizens. On 12 July 2012, Iraqi Foreign Minister Hoshiyar Zebari told reporters in Paris that Nawaf al Fares is in Qatar.

The Syrian Foreign and Expatriates Ministry in Damascus issued a statement on 12 July 2012 dismissing Fares. The declaration stated that Fares "has been relieved of his duties" and "no longer has any link with the Syrian Embassy in Baghdad." It is further stated by the Ministry that he should be punished due to "legal and disciplinary accountability."

In his 15 July 2012 CNN interview, Fares said that he had tried to convince the Syrian government to change its approach towards the people and that foreign military intervention was needed to end the chaos in Syria. In a BBC interview, Fares warned that the Syrian government would be likely to use chemical weapons against rebels, and raised the possibility that they may have already done so.

Personal life
Fares is a Sunni Muslim from Abu Kamal, near Deir al Zor, an eastern Syrian city. His family is reported to partly be rooted in the Sunni tribe of Iraq's Anbar Province, which extends to Syria's eastern desert. Fares is reported to be the leader of a powerful clan, Al Jarrah, in the Abu Kamal area, adjacent to Iraq. Al Jarrah, is a branch of the Al Uqaydat tribal confederation, the largest in eastern Syria. The clan has nearly 1.5 million members across 40% of Syria. It also has kinship relations to Saudi Arabia, Kuwait and Qatar. It was powerful and prominent due to its legacy of fighting against the French forces in the 1940s, and Fares' career with the Ba'athist government.

title: Nawaf al-Fares


text:
Wikipedia:WikiProject Spam/Local/likewap.online

Links

 * likewap.online resolves to [//<IP_ADDRESS> <IP_ADDRESS>]
 * Link is not on the blacklist.
 * Link is not on the domainredlist.
 * Link is not on the Monitorlist.
 * None of the mentioned users is on the blacklist.
 * Link is not on the whitelist.
 * Link is not on the monitor list.
 * None of the mentioned users is on the blacklist.
 * Link is not on the whitelist.
 * Link is not on the monitor list.

Selected additions

 * Displayed 18 additions out of 18 total.	 For more info see WikiProject_Spam/LinkReports/likewap.online

Entry
Log entry for the MediaWiki:Spam-blacklist:

\blikewap\.online\b         # ADMINNAME # see  [[Wikipedia:WikiProject_Spam/Local/likewap.online ]]

Discussion
See COIBot report for more details.

New data reported. --COIBot (talk) 05:52, 20 September 2017 (UTC)

New data reported. --COIBot (talk) 06:11, 20 September 2017 (UTC)

New data reported. --COIBot (talk) 06:14, 20 September 2017 (UTC)

New data reported. --COIBot (talk) 06:15, 20 September 2017 (UTC)

New data reported. --COIBot (talk) 06:17, 20 September 2017 (UTC)

New data reported. --COIBot (talk) 06:18, 20 September 2017 (UTC)

New data reported. No links left in here mentioned edits. Marked stale. --COIBot (talk) 07:03, 20 September 2017 (UTC)


text:
Wikipedia:Copyright problems/2012 July 11

11 July 2012
SCV for 2012-07-11 [ Edit]

Copyright investigations (manual article tagging)

 * Black Lake Nature Reserve ([ history] · [ last edit]) from http://www.cheshirewildlifetrust.org.uk/reserves/black-lake. Dave.Dunford (talk) 10:35, 11 July 2012 (UTC)

 * Pictogram voting keep.svg Article cleaned by investigator or others. No remaining infringement. --Dpmuk (talk) 17:02, 19 July 2012 (UTC)

 * User:Jssteil/sandbox/Radiation carcinogenesis in past space missions ([ history] · [ last edit]) from http://humanresearchroadmap.nasa.gov/evidence/reports/carcinogenesis.pdf.  —Chris Capoccia  T⁄C 18:39, 11 July 2012 (UTC)

 * [[Image:Pictogram voting support.svg|20px]] No copyright concern. Material PD or appropriately licensed for use. --MER-C 00:23, 19 July 2012 (UTC)

 * Hatch Mere Nature Reserve ([ history] · [ last edit]) from http://www.cheshirewildlifetrust.org.uk/reserves/hatch-mere. Dave.Dunford (talk) 18:47, 11 July 2012 (UTC)

 * Pictogram voting keep.svg Article cleaned by investigator or others. No remaining infringement. --Dpmuk (talk) 17:02, 19 July 2012 (UTC)

 * Abbotts Moss Nature Reserve ([ history] · [ last edit]) from http://www.cheshirewildlifetrust.org.uk/reserves/abbots-moss. Dave.Dunford (talk) 18:47, 11 July 2012 (UTC)

 * Pictogram voting keep.svg Article cleaned by investigator or others. No remaining infringement. --Dpmuk (talk) 17:02, 19 July 2012 (UTC)

 * Cleaver Heath Nature Reserve ([ history] · [ last edit]) from http://www.cheshirewildlifetrust.org.uk/reserves/cleaver-heath. Dave.Dunford (talk) 19:39, 11 July 2012 (UTC)

 * Pictogram voting keep.svg Article cleaned by investigator or others. No remaining infringement. --Dpmuk (talk) 17:02, 19 July 2012 (UTC)

 * Northern Forest Canoe Trail ([ history] · [ last edit]) from http://www.northernforestcanoetrail.org/PlanaTrip-2/NFCT-Trail-Overview-35. Presidentman talk · contribs Random Picture of the Day (Talkback) 20:11, 11 July 2012 (UTC)

 * Pictogram voting keep.svg Article cleaned by investigator or others. No remaining infringement. --Dpmuk (talk) 17:05, 19 July 2012 (UTC)

 * Cotterill Clough Nature Reserve ([ history] · [ last edit]) from http://www.cheshirewildlifetrust.org.uk/reserves/cotterill-cough. Dave.Dunford (talk) 20:27, 11 July 2012 (UTC)

 * Pictogram voting keep.svg Article cleaned by investigator or others. No remaining infringement. --Dpmuk (talk) 17:02, 19 July 2012 (UTC)

 * Bioceramics material ([ history] · [ last edit]) from http://www.scribd.com/doc/50676713/251/Usage-properties-of-biomedical-ceramics. Copy paste. DpmukBOT (talk) 00:00, 12 July 2012 (UTC)
 * Integral imaging ([ history] · [ last edit]) with no source given. Copy paste. DpmukBOT (talk) 00:00, 12 July 2012 (UTC)
 * Converted to copyvio and relisted

 * Kids Company ([ history] · [ last edit]) from http://www.kidsco.org.uk/about-us. Copy paste. DpmukBOT (talk) 00:00, 12 July 2012 (UTC)

 * Pictogram voting keep.svg Article cleaned by investigator or others. No remaining infringement. --Dpmuk (talk) 17:06, 19 July 2012 (UTC)

 * Ma Weiqi ([ history] · [ last edit]) with no source given. Copy paste. DpmukBOT (talk) 00:00, 12 July 2012 (UTC)


text:
spring-heeled

Adjective

 * 1) Having, or seeming to have, springs on one's heels, and so able to jump much higher than usual.

title: spring-heeled


text:
Jim Colver

James C. Colver (born 1958) is an American politician from Alaska. A Republican, he is a former member of the Alaska House of Representatives, serving House District 9 from 2015 through 2016. He is also a former assemblyman for the Matanuska-Susitna Borough.

Colver lost his bid for reelection in 2016 during the Republican primary. Colver mounted a successful primary challenge to incumbent Representative Eric Feige in 2014; the Chickaloon Republican finished third in the three-way primary election on August 19. He went on to defeat Palmer Democrat Mabel Wimmer and Constitution Party nominee Pam Goode of Delta Junction in the general election, finishing on top in another three-way contest.

Personal life
Jim Colver was born in Anchorage, Alaska to Warren and Della Colver. His father served as attorney general of Alaska in the early years of Alaska's statehood under governor William A. Egan. He lives in the Hatcher Pass area, near Palmer.

Colver joined the Republican Party in 2012. He acknowledged during his 2014 campaign that he previously supported several Democratic candidates, including Mark Begich in the 2008 U.S. Senate election. After graduating from West Anchorage High School, Jim Colver continued onto receive his associate degree in Surveying Technology from the University of Anchorage, Alaska. Following his A.S., he went on to receive his bachelor's degree in Business Management and Law from the University of Anchorage, Alaska.

title: Jim Colver


text:
Talk:Ambient Light Sensor

This article is a bad redirect, please write a new one and delete the redirect as the redirect link is rubbish! — Preceding unsigned comment added by <IP_ADDRESS> (talk • contribs) 14:51, 11 July 2012 (UTC)
 * Agreed. The article at Ambient Light Sensor should be moved here, replacing this redirect.--Srleffler (talk) 05:35, 8 September 2018 (UTC)
 * Done, requested at WP:RM/TR. — Frayæ (Talk/Spjall) 10:06, 8 September 2018 (UTC)

title: Talk:Ambient Light Sensor


text:
Moshe Zorman

Moshe Zorman (Hebrew: משה זורמן; born 15 May 1952) is an Israeli composer. His works include nine operas —among them “The Inn of Spirits” after Natan Alterman’s play of the same name—as well as works for symphony orchestra, chamber groups and choirs. His works and arrangements have been performed by the Israel Philharmonic Orchestra, the Welsh BBC Orchestra, the Jerusalem Symphony Orchestra (IBA), the Israel Sinfonietta Beer-Sheva and the Baltimore Symphony, among others. He has also written music for theatre productions at the Habima and Cameri theatres in Israel and for the Inbal and Bat-Sheva dance companies.

Biography
Zorman studied composition with Prof. Leon Schidlowsky and Prof. Tzvi Avni. After graduating from the Tel Aviv Music Academy, he studied for his Ph.D at New York City University Graduate Ceber CUNY with George Perle and participated in composers’ seminars in Vermont (with Mario Davidovsky) and in Canada (with John Cage). He returned to Israel in 1985 to teach at Tel Aviv University and is a professor at the Levinsky College of Education. Zorman was a member of the Israel Composers' League Board of Directors, and initiated a series of concerts dedicated to Israeli composers. He is also a member of different music committees in the Israel Ministry of Education. From 1990 to 1996 he was the head of the Music Department at the Levinsky Teachers’ College in Tel Aviv. He continues to teach at the college, and is currently head of the Music Cathedra at the Einav Cultural Center in Tel Aviv.
 * occupation=Composer, arranger, musicologist

Awards

 * The Mifal Hayis Landau Prize for contemporary classical composer (2017)
 * Israel Prime minister's prize for composers (2002)
 * “the Sam Spiegel School” in Jerusalem for music for film, (2002)
 * ACUM Prize for original composition (1993).

title: Moshe Zorman


text:
User:Jrash~enwikibooks

I read Wikibooks as much as I can, fixing typos and adding little pieces of information as I go along. That's pretty much it.

see Jrash (Wikipedia)

title: User:Jrash~enwikibooks


text:
Talk:Wheelchair Football (American)

Copyright problem removed
Prior content in this article duplicated one or more previously published sources. The material was copied from: http://www.ucblueash.edu/kraimer/PAGE3.HTM. Copied or closely paraphrased material has been rewritten or removed and must not be restored, unless it is duly released under a compatible license. (For more information, please see "using copyrighted works from others" if you are not the copyright holder of this material, or "donating copyrighted materials" if you are.) For legal reasons, we cannot accept copyrighted text or images borrowed from other web sites or published material; such additions will be deleted. Contributors may use copyrighted publications as a source of information, but not as a source of sentences or phrases. Accordingly, the material may be rewritten, but only if it does not infringe on the copyright of the original or plagiarize from that source. Please see our guideline on non-free text for how to properly implement limited quotations of copyrighted text. Wikipedia takes copyright violations very seriously, and persistent violators will be blocked from editing. While we appreciate contributions, we must require all contributors to understand and comply with these policies. Thank you. MER-C 12:54, 11 July 2012 (UTC)
 * See also Contributor copyright investigations/Druidhills. MER-C 12:54, 11 July 2012 (UTC)

football
I want to play wheelchair football Ccmcurt (talk) 14:57, 24 August 2017 (UTC)

American only?
Is there a separate Canadian derived wheelchair football or do both countries play by the same rules? --Khajidha (talk) 20:39, 5 March 2018 (UTC)

title: Talk:Wheelchair Football (American)