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85-472: [REDACTED] Degrassi: The Next Generation is a Canadian teen drama television series created by Linda Schuyler and Yan Moore . Degrassi: The Next Generation is the fourth entry of the Degrassi television franchise created by Schuyler and Kit Hood , and a revival of Degrassi Junior High and Degrassi High . In Canada, it premiered on CTV on October 14, 2001, and ended on MTV Canada on August 2, 2015. Like its predecessors, it follows

170-471: A directional antenna transmits radio waves in a beam in a particular direction, or receives waves from only one direction. Radio waves travel at the speed of light in vacuum and at slightly lower velocity in air. The other types of electromagnetic waves besides radio waves, infrared , visible light , ultraviolet , X-rays and gamma rays , can also carry information and be used for communication. The wide use of radio waves for telecommunication

255-418: A microphone , a video signal representing moving images from a video camera , or a digital signal consisting of a sequence of bits representing binary data from a computer. The modulation signal is applied to a radio transmitter . In the transmitter, an electronic oscillator generates an alternating current oscillating at a radio frequency , called the carrier wave because it serves to generate

340-497: A radar screen . Doppler radar can measure a moving object's velocity, by measuring the change in frequency of the return radio waves due to the Doppler effect . Radar sets mainly use high frequencies in the microwave bands, because these frequencies create strong reflections from objects the size of vehicles and can be focused into narrow beams with compact antennas. Parabolic (dish) antennas are widely used. In most radars

425-474: A " push to talk " button on their radio which switches off the receiver and switches on the transmitter. Or the radio link may be full duplex , a bidirectional link using two radio channels so both people can talk at the same time, as in a cell phone. One way, unidirectional radio transmission is called simplex . This is radio communication between a spacecraft and an Earth-based ground station, or another spacecraft. Communication with spacecraft involves

510-627: A Service Regulation specifying that "Radiotelegrams shall show in the preamble that the service is 'Radio ' ". The switch to radio in place of wireless took place slowly and unevenly in the English-speaking world. Lee de Forest helped popularize the new word in the United States—in early 1907, he founded the DeForest Radio Telephone Company, and his letter in the 22 June 1907 Electrical World about

595-462: A better understanding of the film. According to the taxonomy, combining the type with the genre does not create a separate genre. For instance, the "Horror Drama" is simply a dramatic horror film (as opposed to a comedic horror film). "Horror Drama" is not a genre separate from the horror genre or the drama type. Crime dramas explore themes of truth, justice, and freedom, and contain the fundamental dichotomy of "criminal vs. lawman". Crime films make

680-412: A controller device control the actions of a remote device. The existence of radio waves was first proven by German physicist Heinrich Hertz on 11 November 1886. In the mid-1890s, building on techniques physicists were using to study electromagnetic waves, Italian physicist Guglielmo Marconi developed the first apparatus for long-distance radio communication, sending a wireless Morse Code message to

765-421: A given bandwidth than analog modulation , by using data compression algorithms, which reduce redundancy in the data to be sent, and more efficient modulation. Other reasons for the transition is that digital modulation has greater noise immunity than analog, digital signal processing chips have more power and flexibility than analog circuits, and a wide variety of types of information can be transmitted using

850-548: A government license, such as the general radiotelephone operator license in the US, obtained by taking a test demonstrating adequate technical and legal knowledge of safe radio operation. Exceptions to the above rules allow the unlicensed operation by the public of low power short-range transmitters in consumer products such as cell phones, cordless phones , wireless devices , walkie-talkies , citizens band radios , wireless microphones , garage door openers , and baby monitors . In

935-587: A large economic cost, but it can also be life-threatening (for example, in the case of interference with emergency communications or air traffic control ). To prevent interference between different users, the emission of radio waves is strictly regulated by national laws, coordinated by an international body, the International Telecommunication Union (ITU), which allocates bands in the radio spectrum for different uses. Radio transmitters must be licensed by governments, under

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1020-595: A metal conductor called an antenna . As they travel farther from the transmitting antenna, radio waves spread out so their signal strength ( intensity in watts per square meter) decreases (see Inverse-square law ), so radio transmissions can only be received within a limited range of the transmitter, the distance depending on the transmitter power, the antenna radiation pattern , receiver sensitivity, background noise level, and presence of obstructions between transmitter and receiver . An omnidirectional antenna transmits or receives radio waves in all directions, while

1105-685: A more central component of the story, along with serious content.  Examples include Three Colours: White (1994), The Truman Show (1998), The Man Without a Past (2002), The Best Exotic Marigold Hotel (2011), and Silver Linings Playbook (2012). Coined by film professor Ken Dancyger , these stories exaggerate characters and situations to the point of becoming fable, legend or fairy tale.  Examples: Fantastic Mr. Fox (2009) and Maleficent (2014). Light dramas are light-hearted stories that are, nevertheless, serious in nature.  Examples: The Help (2011) and The Terminal (2004). Psychological dramas are dramas that focus on

1190-427: A more limited information-carrying capacity and so work best with audio signals (speech and music), and the sound quality can be degraded by radio noise from natural and artificial sources. The shortwave bands have a greater potential range but are more subject to interference by distant stations and varying atmospheric conditions that affect reception. In the very high frequency band, greater than 30 megahertz,

1275-400: A particular setting or subject matter, or they combine a drama's otherwise serious tone with elements that encourage a broader range of moods . To these ends, a primary element in a drama is the occurrence of conflict —emotional, social, or otherwise—and its resolution in the course of the storyline. All forms of cinema or television that involve fictional stories are forms of drama in

1360-633: A person's life and raises their level of importance. The "small things in life" feel as important to the protagonist (and the audience) as the climactic battle in an action film, or the final shootout in a western.  Often, the protagonists deal with multiple, overlapping issues in the course of the film – just as we do in life.  Films of this type/genre combination include: The Wrestler (2008), Fruitvale Station (2013), and Locke (2013). Romantic dramas are films with central themes that reinforce our beliefs about love (e.g.: themes such as "love at first sight", "love conquers all", or "there

1445-470: A primitive spark-gap transmitter . Experiments by Hertz and physicists Jagadish Chandra Bose , Oliver Lodge , Lord Rayleigh , and Augusto Righi , among others, showed that radio waves like light demonstrated reflection, refraction , diffraction , polarization , standing waves , and traveled at the same speed as light, confirming that both light and radio waves were electromagnetic waves, differing only in frequency. In 1895, Guglielmo Marconi developed

1530-420: A public audience. Analog audio is the earliest form of radio broadcast. AM broadcasting began around 1920. FM broadcasting was introduced in the late 1930s with improved fidelity . A broadcast radio receiver is called a radio . Most radios can receive both AM and FM. Television broadcasting is the transmission of moving images by radio, which consist of sequences of still images, which are displayed on

1615-459: A radio signal is usually concentrated in narrow frequency bands called sidebands ( SB ) just above and below the carrier frequency. The width in hertz of the frequency range that the radio signal occupies, the highest frequency minus the lowest frequency, is called its bandwidth ( BW ). For any given signal-to-noise ratio , an amount of bandwidth can carry the same amount of information ( data rate in bits per second) regardless of where in

1700-489: A receiver that is typically colocated with the transmitter. In radio navigation systems such as GPS and VOR , a mobile navigation instrument receives radio signals from multiple navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones , garage door openers , and keyless entry systems , radio signals transmitted from

1785-533: A recipient over a kilometer away in 1895, and the first transatlantic signal on 12 December 1901. The first commercial radio broadcast was transmitted on 2 November 1920, when the live returns of the Harding-Cox presidential election were broadcast by Westinghouse Electric and Manufacturing Company in Pittsburgh, under the call sign KDKA . The emission of radio waves is regulated by law, coordinated by

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1870-673: A reference to the radiotelegraph and radiotelegraphy . The use of radio as a standalone word dates back to at least 30 December 1904, when instructions issued by the British Post Office for transmitting telegrams specified that "The word 'Radio'... is sent in the Service Instructions." This practice was universally adopted, and the word "radio" introduced internationally, by the 1906 Berlin Radiotelegraphic Convention, which included

1955-446: A screen on a television receiver (a "television" or TV) along with a synchronized audio (sound) channel. Television ( video ) signals occupy a wider bandwidth than broadcast radio ( audio ) signals. Analog television , the original television technology, required 6 MHz, so the television frequency bands are divided into 6 MHz channels, now called "RF channels". The current television standard, introduced beginning in 2006,

2040-441: A smaller bandwidth than the old analog channels, saving scarce radio spectrum space. Therefore, each of the 6 MHz analog RF channels now carries up to 7 DTV channels – these are called "virtual channels". Digital television receivers have different behavior in the presence of poor reception or noise than analog television, called the " digital cliff " effect. Unlike analog television, in which increasingly poor reception causes

2125-464: A specific approach to drama but, rather, consider drama as a lack of comedic techniques.  Examples: Ghost World (2001) and Wuthering Heights (2011). According to the Screenwriters' Taxonomy, all film descriptions should contain their type (comedy or drama) combined with one (or more) of the eleven super-genres. This combination does not create a separate genre, but rather, provides

2210-416: A television (video) signal has a greater data rate than an audio signal . The radio spectrum , the total range of radio frequencies that can be used for communication in a given area, is a limited resource. Each radio transmission occupies a portion of the total bandwidth available. Radio bandwidth is regarded as an economic good which has a monetary cost and is in increasing demand. In some parts of

2295-400: A transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location to

2380-652: A transmitter to control the actions of a device at a remote location. Remote control systems may also include telemetry channels in the other direction, used to transmit real-time information on the state of the device back to the control station. Uncrewed spacecraft are an example of remote-controlled machines, controlled by commands transmitted by satellite ground stations . Most handheld remote controls used to control consumer electronics products like televisions or DVD players actually operate by infrared light rather than radio waves, so are not examples of radio remote control. A security concern with remote control systems

2465-699: A unique opportunity to tell this story through such a beloved character. As saddened as we are to say goodbye to Adam, we feel this storyline will affect even more lives in an authentic way... Teen drama In film and television , drama is a category or genre of narrative fiction (or semi-fiction ) intended to be more serious than humorous in tone. The drama of this kind is usually qualified with additional terms that specify its particular super-genre, macro-genre, or micro-genre, such as soap opera , police crime drama , political drama , legal drama , historical drama , domestic drama , teen drama , and comedy-drama (dramedy). These terms tend to indicate

2550-435: A variety of license classes depending on use, and are restricted to certain frequencies and power levels. In some classes, such as radio and television broadcasting stations, the transmitter is given a unique identifier consisting of a string of letters and numbers called a call sign , which must be used in all transmissions. In order to adjust, maintain, or internally repair radiotelephone transmitters, individuals must hold

2635-413: Is amplified in the transmitter and applied to a transmitting antenna which radiates the energy as radio waves. The radio waves carry the information to the receiver location. At the receiver, the radio wave induces a tiny oscillating voltage in the receiving antenna which is a weaker replica of the current in the transmitting antenna. This voltage is applied to the radio receiver , which amplifies

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2720-703: Is spoofing , in which an unauthorized person transmits an imitation of the control signal to take control of the device. Examples of radio remote control: Radio jamming is the deliberate radiation of radio signals designed to interfere with the reception of other radio signals. Jamming devices are called "signal suppressors" or "interference generators" or just jammers. During wartime, militaries use jamming to interfere with enemies' tactical radio communication. Since radio waves can pass beyond national borders, some totalitarian countries which practice censorship use jamming to prevent their citizens from listening to broadcasts from radio stations in other countries. Jamming

2805-445: Is a digital format called high-definition television (HDTV), which transmits pictures at higher resolution, typically 1080 pixels high by 1920 pixels wide, at a rate of 25 or 30 frames per second. Digital television (DTV) transmission systems, which replaced older analog television in a transition beginning in 2006, use image compression and high-efficiency digital modulation such as OFDM and 8VSB to transmit HDTV video within

2890-526: Is a final fight to the death; the idea of the protagonists facing death is a central expectation in a war drama film. In a war film even though the enemy may out-number, or out-power, the hero, we assume that the enemy can be defeated if only the hero can figure out how.   Examples include: Apocalypse Now (1979), Come and See (1985), Braveheart (1995), Life Is Beautiful (1997), Black Book (2006), The Hurt Locker (2008), 1944 (2015), Wildeye (2015), and 1917 (2019). Films in

2975-433: Is an audio transceiver , a receiver and transmitter in the same device, used for bidirectional person-to-person voice communication with other users with similar radios. An older term for this mode of communication is radiotelephony . The radio link may be half-duplex , as in a walkie-talkie , using a single radio channel in which only one radio can transmit at a time, so different users take turns talking, pressing

3060-410: Is called "tuning". The oscillating radio signal from the desired station causes the tuned circuit to resonate , oscillate in sympathy, and it passes the signal on to the rest of the receiver. Radio signals at other frequencies are blocked by the tuned circuit and not passed on. A modulated radio wave, carrying an information signal, occupies a range of frequencies . The information ( modulation ) in

3145-427: Is called an uplink , while a link that transmits data from the spacecraft to the ground is called a downlink. Radar is a radiolocation method used to locate and track aircraft, spacecraft, missiles, ships, vehicles, and also to map weather patterns and terrain. A radar set consists of a transmitter and receiver. The transmitter emits a narrow beam of radio waves which is swept around the surrounding space. When

3230-565: Is in radio clocks and watches, which include an automated receiver that periodically (usually weekly) receives and decodes the time signal and resets the watch's internal quartz clock to the correct time, thus allowing a small watch or desk clock to have the same accuracy as an atomic clock. Government time stations are declining in number because GPS satellites and the Internet Network Time Protocol (NTP) provide equally accurate time standards. A two-way radio

3315-417: Is mainly due to their desirable propagation properties stemming from their longer wavelength. In radio communication systems, information is carried across space using radio waves. At the sending end, the information to be sent is converted by some type of transducer to a time-varying electrical signal called the modulation signal. The modulation signal may be an audio signal representing sound from

3400-421: Is someone out there for everyone"); the story typically revolves around characters falling into (and out of, and back into) love. Annie Hall (1977), The Notebook (2004), Carol (2015), Her (2013) , and La La Land (2016) are examples of romance dramas. The science fiction drama film is often the story of a protagonist (and their allies) facing something "unknown" that has the potential to change

3485-622: Is that in a documentary it uses real people to describe history or current events; in a docudrama it uses professionally trained actors to play the roles in the current event, that is "dramatized" a bit. Examples: Black Mass (2015) and Zodiac (2007). Unlike docudramas, docu-fictional films combine documentary and fiction, where actual footage or real events are intermingled with recreated scenes. Examples: Interior. Leather Bar (2013) and Your Name Here (2015). Many otherwise serious productions have humorous scenes and characters intended to provide comic relief . A comedy drama has humor as

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3570-524: Is the one-way transmission of information from a transmitter to receivers belonging to a public audience. Since the radio waves become weaker with distance, a broadcasting station can only be received within a limited distance of its transmitter. Systems that broadcast from satellites can generally be received over an entire country or continent. Older terrestrial radio and television are paid for by commercial advertising or governments. In subscription systems like satellite television and satellite radio

3655-595: The International Telecommunication Union (ITU), which allocates frequency bands in the radio spectrum for various uses. The word radio is derived from the Latin word radius , meaning "spoke of a wheel, beam of light, ray". It was first applied to communications in 1881 when, at the suggestion of French scientist Ernest Mercadier  [ fr ] , Alexander Graham Bell adopted radiophone (meaning "radiated sound") as an alternate name for his photophone optical transmission system. Following Hertz's discovery of

3740-504: The ionosphere without refraction , and at microwave frequencies the high-gain antennas needed to focus the radio energy into a narrow beam pointed at the receiver are small and take up a minimum of space in a satellite. Portions of the UHF , L , C , S , k u and k a band are allocated for space communication. A radio link that transmits data from the Earth's surface to a spacecraft

3825-400: The radio spectrum into 12 bands, each beginning at a wavelength which is a power of ten (10 ) metres, with corresponding frequency of 3 times a power of ten, and each covering a decade of frequency or wavelength. Each of these bands has a traditional name: It can be seen that the bandwidth , the range of frequencies, contained in each band is not equal but increases exponentially as

3910-763: The western super-genre often take place in the American Southwest or Mexico, with a large number of scenes occurring outdoors so we can soak in scenic landscapes. Visceral expectations for the audience include fistfights, gunplay, and chase scenes. There is also the expectation of spectacular panoramic images of the countryside including sunsets, wide open landscapes, and endless deserts and sky.   Examples of western dramas include: True Grit (1969) and its 2010 remake , Mad Max (1979), Unforgiven (1992), No Country for Old Men (2007), Django Unchained (2012), Hell or High Water (2016), and Logan (2017). Some film categories that use

3995-531: The 1920s with the introduction of broadcasting. Electromagnetic waves were predicted by James Clerk Maxwell in his 1873 theory of electromagnetism , now called Maxwell's equations , who proposed that a coupled oscillating electric field and magnetic field could travel through space as a wave, and proposed that light consisted of electromagnetic waves of short wavelength . On 11 November 1886, German physicist Heinrich Hertz , attempting to confirm Maxwell's theory, first observed radio waves he generated using

4080-493: The Apes (1968), A Clockwork Orange (1971), Blade Runner (1982) and its sequel Blade Runner 2049 (2017), Children of Men (2006), Interstellar (2014), and Arrival (2016). In the sports super-genre, characters will be playing sports. Thematically, the story is often one of "Our Team" versus "Their Team"; their team will always try to win, and our team will show the world that they deserve recognition or redemption;

4165-474: The Earth's atmosphere has less of an effect on the range of signals, and line-of-sight propagation becomes the principal mode. These higher frequencies permit the great bandwidth required for television broadcasting. Since natural and artificial noise sources are less present at these frequencies, high-quality audio transmission is possible, using frequency modulation . Radio broadcasting means transmission of audio (sound) to radio receivers belonging to

4250-596: The US, these fall under Part 15 of the Federal Communications Commission (FCC) regulations. Many of these devices use the ISM bands , a series of frequency bands throughout the radio spectrum reserved for unlicensed use. Although they can be operated without a license, like all radio equipment these devices generally must be type-approved before the sale. Below are some of the most important uses of radio, organized by function. Broadcasting

4335-405: The air simultaneously without interfering with each other because each transmitter's radio waves oscillate at a different rate, in other words, each transmitter has a different frequency , measured in hertz (Hz), kilohertz (kHz), megahertz (MHz) or gigahertz (GHz). The receiving antenna typically picks up the radio signals of many transmitters. The receiver uses tuned circuits to select

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4420-407: The audience jump through a series of mental "hoops"; it is not uncommon for the crime drama to use verbal gymnastics to keep the audience and the protagonist on their toes.   Examples of crime dramas include: The Godfather (1972), Chinatown (1974), Goodfellas (1990), The Usual Suspects (1995), The Big Short (2015), and Udta Punjab (2016). According to Eric R. Williams ,

4505-414: The beam strikes a target object, radio waves are reflected back to the receiver. The direction of the beam reveals the object's location. Since radio waves travel at a constant speed close to the speed of light , by measuring the brief time delay between the outgoing pulse and the received "echo", the range to the target can be calculated. The targets are often displayed graphically on a map display called

4590-412: The broader sense if their storytelling is achieved by means of actors who represent ( mimesis ) characters . In this broader sense, drama is a mode distinct from novels, short stories , and narrative poetry or songs . In the modern era, before the birth of cinema or television, "drama" within theatre was a type of play that was neither a comedy nor a tragedy . It is this narrower sense that

4675-533: The characters' inner life and psychological problems. Examples: Requiem for a Dream (2000), Oldboy (2003), Babel (2006), Whiplash (2014), and Anomalisa (2015) Satire can involve humor, but the result is typically sharp social commentary that is anything but funny. Satire often uses irony or exaggeration to expose faults in society or individuals that influence social ideology.  Examples: Thank You for Smoking (2005) and Idiocracy (2006). Straight drama applies to those that do not attempt

4760-668: The continuous waves which were needed for audio modulation , so radio was used for person-to-person commercial, diplomatic and military text messaging. Starting around 1908 industrial countries built worldwide networks of powerful transoceanic transmitters to exchange telegram traffic between continents and communicate with their colonies and naval fleets. During World War I the development of continuous wave radio transmitters, rectifying electrolytic, and crystal radio receiver detectors enabled amplitude modulation (AM) radiotelephony to be achieved by Reginald Fessenden and others, allowing audio to be transmitted. On 2 November 1920,

4845-473: The course of the film. Thematically, horror films often serve as morality tales, with the killer serving up violent penance for the victims' past sins.  Metaphorically, these become battles of Good vs. Evil or Purity vs. Sin.  Psycho (1960), Halloween (1978), The Shining (1980), The Conjuring (2013), It (2017), mother! (2017), and Hereditary (2018) are examples of horror drama films. Day-in-the-life films takes small events in

4930-466: The customer pays a monthly fee. In these systems, the radio signal is encrypted and can only be decrypted by the receiver, which is controlled by the company and can be deactivated if the customer does not pay. Broadcasting uses several parts of the radio spectrum, depending on the type of signals transmitted and the desired target audience. Longwave and medium wave signals can give reliable coverage of areas several hundred kilometers across, but have

5015-570: The existence of radio waves in 1886, the term Hertzian waves was initially used for this radiation. The first practical radio communication systems, developed by Marconi in 1894–1895, transmitted telegraph signals by radio waves, so radio communication was first called wireless telegraphy . Up until about 1910 the term wireless telegraphy also included a variety of other experimental systems for transmitting telegraph signals without wires, including electrostatic induction , electromagnetic induction and aquatic and earth conduction , so there

5100-481: The family as a whole reacts to a central challenge. There are four micro-genres for the family drama: Family Bond , Family Feud , Family Loss , and Family Rift . A sub-type of drama films that uses plots that appeal to the heightened emotions of the audience. Melodramatic plots often deal with "crises of human emotion, failed romance or friendship, strained familial situations, tragedy, illness, neuroses, or emotional and physical hardship". Film critics sometimes use

5185-409: The film and television industries, along with film studies , adopted. " Radio drama " has been used in both senses—originally transmitted in a live performance, it has also been used to describe the more high-brow and serious end of the dramatic output of radio . The Screenwriters Taxonomy contends that film genres are fundamentally based upon a film's atmosphere, character and story, and therefore

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5270-413: The first commercial radio broadcast was transmitted by Westinghouse Electric and Manufacturing Company in Pittsburgh, under the call sign KDKA featuring live coverage of the Harding-Cox presidential election . Radio waves are radiated by electric charges undergoing acceleration . They are generated artificially by time-varying electric currents , consisting of electrons flowing back and forth in

5355-592: The first radio communication system, using a spark-gap transmitter to send Morse code over long distances. By December 1901, he had transmitted across the Atlantic Ocean. Marconi and Karl Ferdinand Braun shared the 1909 Nobel Prize in Physics "for their contributions to the development of wireless telegraphy". During radio's first two decades, called the radiotelegraphy era, the primitive radio transmitters could only transmit pulses of radio waves, not

5440-618: The frequency increases; each band contains ten times the bandwidth of the preceding band. The term "tremendously low frequency" (TLF) has been used for wavelengths from 1–3 Hz (300,000–100,000 km), though the term has not been defined by the ITU. The airwaves are a resource shared by many users. Two radio transmitters in the same area that attempt to transmit on the same frequency will interfere with each other, causing garbled reception, so neither transmission may be received clearly. Interference with radio transmissions can not only have

5525-416: The future of humanity; this unknown may be represented by a villain with incomprehensible powers, a creature we do not understand, or a scientific scenario that threatens to change the world; the science fiction story forces the audience to consider the nature of human beings, the confines of time or space or the concepts of human existence in general. Examples include: Metropolis (1927), Planet of

5610-416: The hallmark of fantasy drama films is "a sense of wonderment, typically played out in a visually intense world inhabited by mythic creatures, magic or superhuman characters. Props and costumes within these films often belie a sense of mythology and folklore – whether ancient, futuristic, or other-worldly. The costumes, as well as the exotic world, reflect the personal, inner struggles that the hero faces in

5695-408: The labels "drama" and "comedy" are too broad to be considered a genre. Instead, the taxonomy contends that film dramas are a "Type" of film; listing at least ten different sub-types of film and television drama. Docudramas are dramatized adaptations of real-life events. While not always completely accurate, the general facts are more-or-less true. The difference between a docudrama and a documentary

5780-540: The legal system. Films that focus on dramatic events in history. Focuses on doctors, nurses, hospital staff, and ambulance saving victims and the interactions of their daily lives. Focuses on teenage characters, especially where a secondary school setting plays a role. Radio In radio communication , used in radio and television broadcasting , cell phones, two-way radios , wireless networking , and satellite communication , among numerous other uses, radio waves are used to carry information across space from

5865-588: The lives of students attending the titular fictitious Toronto school and depicts some of the typical issues and challenges common to a teenager's life. It also features several cast members from the previous series in recurring adult roles. The following is a list of characters who have appeared in the television series. The following actors have all received star billing and appeared in the opening credits of Degrassi: The Next Generation . When Degrassi introduced its large and loyal audience to Adam Torres, an authentic, multi-dimensional transgender character,

5950-402: The longest transmission distances of any radio links, up to billions of kilometers for interplanetary spacecraft . In order to receive the weak signals from distant spacecraft, satellite ground stations use large parabolic "dish" antennas up to 25 metres (82 ft) in diameter and extremely sensitive receivers. High frequencies in the microwave band are used, since microwaves pass through

6035-472: The need for legal restrictions warned that "Radio chaos will certainly be the result until such stringent regulation is enforced." The United States Navy would also play a role. Although its translation of the 1906 Berlin Convention used the terms wireless telegraph and wireless telegram , by 1912 it began to promote the use of radio instead. The term started to become preferred by the general public in

6120-505: The picture quality to gradually degrade, in digital television picture quality is not affected by poor reception until, at a certain point, the receiver stops working and the screen goes black. Government standard frequency and time signal services operate time radio stations which continuously broadcast extremely accurate time signals produced by atomic clocks , as a reference to synchronize other clocks. Examples are BPC , DCF77 , JJY , MSF , RTZ , TDF , WWV , and YVTO . One use

6205-451: The radio frequency spectrum it is located, so bandwidth is a measure of information-carrying capacity . The bandwidth required by a radio transmission depends on the data rate of the information (modulation signal) being sent, and the spectral efficiency of the modulation method used; how much data it can transmit in each kilohertz of bandwidth. Different types of information signals carried by radio have different data rates. For example,

6290-409: The radio signal desired out of all the signals picked up by the antenna and reject the others. A tuned circuit (also called resonant circuit or tank circuit) acts like a resonator , similar to a tuning fork . It has a natural resonant frequency at which it oscillates. The resonant frequency of the receiver's tuned circuit is adjusted by the user to the frequency of the desired radio station; this

6375-451: The radio spectrum, the right to use a frequency band or even a single radio channel is bought and sold for millions of dollars. So there is an incentive to employ technology to minimize the bandwidth used by radio services. A slow transition from analog to digital radio transmission technologies began in the late 1990s. Part of the reason for this is that digital modulation can often transmit more information (a greater data rate) in

6460-456: The radio waves that carry the information through the air. The modulation signal is used to modulate the carrier, varying some aspect of the carrier wave, impressing the information in the modulation signal onto the carrier. Different radio systems use different modulation methods: Many other types of modulation are also used. In some types, a carrier wave is not transmitted but just one or both modulation sidebands . The modulated carrier

6545-481: The same digital modulation. Because it is a fixed resource which is in demand by an increasing number of users, the radio spectrum has become increasingly congested in recent decades, and the need to use it more effectively is driving many additional radio innovations such as trunked radio systems , spread spectrum (ultra-wideband) transmission, frequency reuse , dynamic spectrum management , frequency pooling, and cognitive radio . The ITU arbitrarily divides

6630-411: The show not only made television history, but set a new industry standard for LGBT inclusion. With so few transgender characters on television, we are disappointed that Adam's story had to end this way, and we hope other shows will follow Degrassi' s lead in bringing stories like Adam's to viewers... The combination of Adam being a favorite character, and Jordan being at the end of her contract, presented

6715-534: The story does not always have to involve a team. The story could also be about an individual athlete or the story could focus on an individual playing on a team. Examples of this genre/type include:  The Hustler (1961), Hoosiers (1986), Remember the Titans (2000), and Moneyball (2011). War films typically tells the story of a small group of isolated individuals who – one by one – get killed (literally or metaphorically) by an outside force until there

6800-525: The story." Examples of fantasy dramas include The Lord of the Rings (2001–2003), Pan's Labyrinth (2006), Where the Wild Things Are (2009), and Life of Pi (2012). Horror dramas often involve the central characters isolated from the rest of society. These characters are often teenagers or people in their early twenties (the genre's central audience) and are eventually killed off during

6885-578: The term "pejoratively to connote an unrealistic, pathos-filled, camp tale of romance or domestic situations with stereotypical characters (often including a central female character) that would directly appeal to feminine audiences". Also called "women's movies", "weepies", tearjerkers, or "chick flicks". If they are targeted to a male audience, then they are called "guy cry" films. Often considered "soap-opera" drama. Focuses on religious characters, mystery play, beliefs, and respect. Character development based on themes involving criminals, law enforcement and

6970-431: The transmitting antenna also serves as the receiving antenna; this is called a monostatic radar . A radar which uses separate transmitting and receiving antennas is called a bistatic radar . Radiolocation is a generic term covering a variety of techniques that use radio waves to find the location of objects, or for navigation. Radio remote control is the use of electronic control signals sent by radio waves from

7055-510: The weak radio signal so it is stronger, then demodulates it, extracting the original modulation signal from the modulated carrier wave. The modulation signal is converted by a transducer back to a human-usable form: an audio signal is converted to sound waves by a loudspeaker or earphones, a video signal is converted to images by a display , while a digital signal is applied to a computer or microprocessor, which interacts with human users. The radio waves from many transmitters pass through

7140-498: The word "comedy" or "drama" are not recognized by the Screenwriters Taxonomy as either a film genre or a film type. For instance, "Melodrama" and "Screwball Comedy" are considered Pathways,  while "romantic comedy" and "family drama" are macro-genres. A macro-genre in the Screenwriters Taxonomy. These films tell a story in which many of the central characters are related. The story revolves around how

7225-598: Was a need for a more precise term referring exclusively to electromagnetic radiation. The French physicist Édouard Branly , who in 1890 developed the radio wave detecting coherer , called it in French a radio-conducteur . The radio- prefix was later used to form additional descriptive compound and hyphenated words, especially in Europe. For example, in early 1898 the British publication The Practical Engineer included

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