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The Primary Rate Interface (PRI) is a standardized telecommunications service level within the Integrated Services Digital Network (ISDN) specification for carrying multiple DS0 voice and data transmissions between a network and a user.
PRI is the standard for providing telecommunication services to offices. It is based on the T-carrier (T1) line in the US and Canada, and the E-carrier (E1) line in Europe. The T1 line consists of 24 channels, while an E1 has 32.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
In telecommunications and computing, bit rate (sometimes written bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of time.
The bit rate is quantified using the bits per second unit (symbol bit/s), often in conjunction with an SI prefix such as kilo- (1 kbit/s = 1000 bit/s), mega- (1 Mbit/s = 1000 kbit/s), giga- (1 Gbit/s = 1000 Mbit/s) or tera- (1 Tbit/s = 1000 Gbit/s). The non-standard abbreviation bps is often used to replace the standard symbol bit/s, so that (for example) "1 Mbps" is used to mean one million bits per second.
This video is targeted to blind users.
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Article text available under CC-BY-SA
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- published: 17 Aug 2014
- views: 166
In microelectronics, a dual in-line package, or dual in-line pin package is an electronic component package with a rectangular housing and two parallel rows of electrical connecting pins. The package may be through-hole mounted to a printed circuit board or inserted in a socket. The dual-inline format was invented by Don Forbes, Rex Rice and Bryant Rogers at Fairchild R&D; in 1964, when the restricted number of leads available on circular transistor-style packages became a limitation in the use of integrated circuits. Increasingly complex circuits required more signal and power supply leads; eventually microprocessors and similar complex devices required more leads than could be put on a DIP package, leading to development of higher-density packages. Furthermore, square and rectangular packages made it easier to route printed-circuit traces beneath the packages.
A DIP is usually referred to as a DIPn, where n is the total number of pins. For example, a microcircuit package with two rows of seven vertical leads would be a DIP14. The photograph at the upper right shows three DIP14 ICs. Common packages have as few as four and as many as 64 leads. Many analog and digital integrated circuit types are available in DIP packages, as are arrays of transistors, switches, light emitting diodes, and resistors. DIP plugs for ribbon cables can be used with standard IC sockets.
This video is targeted to blind users.
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- published: 25 Nov 2015
- views: 81
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. It is a number by which the performance of an amplifier or a radio receiver can be specified, with lower values indicating better performance.
The noise factor is defined as the ratio of the output noise power of a device to the portion thereof attributable to thermal noise in the input termination at standard noise temperature T0 (usually 290 K). The noise factor is thus the ratio of actual output noise to that which would remain if the device itself did not introduce noise, or the ratio of input SNR to output SNR.
This video is targeted to blind users.
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- published: 15 Nov 2014
- views: 1130
Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers. The central processing unit (CPU) of a computer is what manipulates data by performing computations. In practice, almost all computers use a storage hierarchy, which puts fast but expensive and small storage options close to the CPU and slower but larger and cheaper options farther away. Often the fast, volatile technologies (which lose data when powered off) are referred to as "memory", while slower permanent technologies are referred to as "storage", but these terms can also be used interchangeably. In the Von Neumann architecture, the CPU consists of two main parts: control unit and arithmetic logic unit (ALU). The former controls the flow of data between the CPU and memory; the latter performs arithmetic and logical operations on data.
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- published: 21 Jul 2014
- views: 217
The characteristic impedance or surge impedance of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction. Characteristic impedance is determined by the geometry and materials of the transmission line and, for a uniform line, is not dependent on its length. The SI unit of characteristic impedance is the ohm.
The characteristic impedance of a lossless transmission line is purely real, with no reactive component. Energy supplied by a source at one end of such a line is transmitted through the line without being dissipated in the line itself. A transmission line of finite length that is terminated at one end with an impedance equal to the characteristic impedance appears to the source like an infinitely long transmission line and produces no reflections.
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- published: 12 Oct 2015
- views: 629
In physics and electrical engineering the reflection coefficient is a parameter that describes how much of an electromagnetic wave is reflected by an impedance discontinuity in the transmission medium. It is equal to the ratio of the amplitude of the reflected wave to the incident wave, with each expressed as phasors. For example, it is used in optics to calculate the amount of light that is reflected from a surface with a different index of refraction, such as a glass surface, or in an electrical transmission line to calculate how much of the electromagnetic wave is reflected by an impedance. The reflection coefficient is closely related to the transmission coefficient. The reflectance of a system is also sometimes called a "reflection coefficient".
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- published: 18 Oct 2015
- views: 315
Identification, friend or foe (IFF) is an identification system designed for command and control. It enables military and national (civilian air traffic control) interrogation systems to identify aircraft, vehicles or forces as friendly and to determine their bearing and range from the interrogator. IFF may be used by both military and civilian aircraft.
IFF was first developed during World War II. The term is a misnomer, as IFF can only positively identify friendly targets, not hostile ones. If an IFF interrogation receives no reply or an invalid reply, the object cannot be identified as friendly, but is not positively identified as foe. There are many reasons that friendly aircraft may not properly reply to IFF.
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- published: 08 Nov 2014
- views: 1561
A transducer is a device that converts a signal in one form of energy to another form of energy. Energy types include (but are not limited to) electrical, mechanical, electromagnetic (including light), chemical, acoustic and thermal energy. While the term transducer commonly implies the use of a sensor/detector, any device which converts energy can be considered a transducer. Transducers are widely used in measuring instruments.
A sensor is used to detect a parameter in one form and report it in another form of energy, often an electrical signal. For example, a pressure sensor might detect pressure (a mechanical form of energy) and convert it to electrical signal for display at a remote gauge.
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- published: 02 Aug 2014
- views: 1220
In electronics, when describing a voltage or current step function, rise time is the time taken by a signal to change from a specified low value to a specified high value. Typically, in analog electronics, these values are 10% and 90% of the step height: in control theory applications, according to Levine (1996, p. 158), rise time is defined as "the time required for the response to rise from x% to y% of its final value", with 0%-100% rise time common for underdamped second order systems, 5%-95% for critically damped and 10%-90% for overdamped. The output signal of a system is characterized also by fall time: both parameters depend on rise and fall times of input signal and on the characteristics of the system.
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- published: 14 Nov 2014
- views: 134
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4:09Primary Rate Interface
Primary Rate InterfacePrimary Rate Interface
The Primary Rate Interface (PRI) is a standardized telecommunications service level within the Integrated Services Digital Network (ISDN) specification for carrying multiple DS0 voice and data transmissions between a network and a user. PRI is the standard for providing telecommunication services to offices. It is based on the T-carrier (T1) line in the US and Canada, and the E-carrier (E1) line in Europe. The T1 line consists of 24 channels, while an E1 has 32. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video -
17:00Bit rate
Bit rateBit rate
In telecommunications and computing, bit rate (sometimes written bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of time. The bit rate is quantified using the bits per second unit (symbol bit/s), often in conjunction with an SI prefix such as kilo- (1 kbit/s = 1000 bit/s), mega- (1 Mbit/s = 1000 kbit/s), giga- (1 Gbit/s = 1000 Mbit/s) or tera- (1 Tbit/s = 1000 Gbit/s). The non-standard abbreviation bps is often used to replace the standard symbol bit/s, so that (for example) "1 Mbps" is used to mean one million bits per second. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video -
19:27Dual in-line package
Dual in-line packageDual in-line package
In microelectronics, a dual in-line package, or dual in-line pin package is an electronic component package with a rectangular housing and two parallel rows of electrical connecting pins. The package may be through-hole mounted to a printed circuit board or inserted in a socket. The dual-inline format was invented by Don Forbes, Rex Rice and Bryant Rogers at Fairchild R&D; in 1964, when the restricted number of leads available on circular transistor-style packages became a limitation in the use of integrated circuits. Increasingly complex circuits required more signal and power supply leads; eventually microprocessors and similar complex devices required more leads than could be put on a DIP package, leading to development of higher-density packages. Furthermore, square and rectangular packages made it easier to route printed-circuit traces beneath the packages. A DIP is usually referred to as a DIPn, where n is the total number of pins. For example, a microcircuit package with two rows of seven vertical leads would be a DIP14. The photograph at the upper right shows three DIP14 ICs. Common packages have as few as four and as many as 64 leads. Many analog and digital integrated circuit types are available in DIP packages, as are arrays of transistors, switches, light emitting diodes, and resistors. DIP plugs for ribbon cables can be used with standard IC sockets. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video -
4:29Noise figure
Noise figureNoise figure
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. It is a number by which the performance of an amplifier or a radio receiver can be specified, with lower values indicating better performance. The noise factor is defined as the ratio of the output noise power of a device to the portion thereof attributable to thermal noise in the input termination at standard noise temperature T0 (usually 290 K). The noise factor is thus the ratio of actual output noise to that which would remain if the device itself did not introduce noise, or the ratio of input SNR to output SNR. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video -
34:30Computer data storage
Computer data storageComputer data storage
Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers. The central processing unit (CPU) of a computer is what manipulates data by performing computations. In practice, almost all computers use a storage hierarchy, which puts fast but expensive and small storage options close to the CPU and slower but larger and cheaper options farther away. Often the fast, volatile technologies (which lose data when powered off) are referred to as "memory", while slower permanent technologies are referred to as "storage", but these terms can also be used interchangeably. In the Von Neumann architecture, the CPU consists of two main parts: control unit and arithmetic logic unit (ALU). The former controls the flow of data between the CPU and memory; the latter performs arithmetic and logical operations on data. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video -
4:56Characteristic impedance
Characteristic impedanceCharacteristic impedance
The characteristic impedance or surge impedance of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction. Characteristic impedance is determined by the geometry and materials of the transmission line and, for a uniform line, is not dependent on its length. The SI unit of characteristic impedance is the ohm. The characteristic impedance of a lossless transmission line is purely real, with no reactive component. Energy supplied by a source at one end of such a line is transmitted through the line without being dissipated in the line itself. A transmission line of finite length that is terminated at one end with an impedance equal to the characteristic impedance appears to the source like an infinitely long transmission line and produces no reflections. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video -
3:38Reflection coefficient
Reflection coefficientReflection coefficient
In physics and electrical engineering the reflection coefficient is a parameter that describes how much of an electromagnetic wave is reflected by an impedance discontinuity in the transmission medium. It is equal to the ratio of the amplitude of the reflected wave to the incident wave, with each expressed as phasors. For example, it is used in optics to calculate the amount of light that is reflected from a surface with a different index of refraction, such as a glass surface, or in an electrical transmission line to calculate how much of the electromagnetic wave is reflected by an impedance. The reflection coefficient is closely related to the transmission coefficient. The reflectance of a system is also sometimes called a "reflection coefficient". This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video -
8:33Identification friend or foe
Identification friend or foeIdentification friend or foe
Identification, friend or foe (IFF) is an identification system designed for command and control. It enables military and national (civilian air traffic control) interrogation systems to identify aircraft, vehicles or forces as friendly and to determine their bearing and range from the interrogator. IFF may be used by both military and civilian aircraft. IFF was first developed during World War II. The term is a misnomer, as IFF can only positively identify friendly targets, not hostile ones. If an IFF interrogation receives no reply or an invalid reply, the object cannot be identified as friendly, but is not positively identified as foe. There are many reasons that friendly aircraft may not properly reply to IFF. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video -
5:13Transducer
TransducerTransducer
A transducer is a device that converts a signal in one form of energy to another form of energy. Energy types include (but are not limited to) electrical, mechanical, electromagnetic (including light), chemical, acoustic and thermal energy. While the term transducer commonly implies the use of a sensor/detector, any device which converts energy can be considered a transducer. Transducers are widely used in measuring instruments. A sensor is used to detect a parameter in one form and report it in another form of energy, often an electrical signal. For example, a pressure sensor might detect pressure (a mechanical form of energy) and convert it to electrical signal for display at a remote gauge. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video -
7:35Rise time
Rise timeRise time
In electronics, when describing a voltage or current step function, rise time is the time taken by a signal to change from a specified low value to a specified high value. Typically, in analog electronics, these values are 10% and 90% of the step height: in control theory applications, according to Levine (1996, p. 158), rise time is defined as "the time required for the response to rise from x% to y% of its final value", with 0%-100% rise time common for underdamped second order systems, 5%-95% for critically damped and 10%-90% for overdamped. The output signal of a system is characterized also by fall time: both parameters depend on rise and fall times of input signal and on the characteristics of the system. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
-
Primary Rate Interface
The Primary Rate Interface (PRI) is a standardized telecommunications service level within the Integrated Services Digital Network (ISDN) specification for carrying multiple DS0 voice and data transmissions between a network and a user. PRI is the standard for providing telecommunication services to offices. It is based on the T-carrier (T1) line in the US and Canada, and the E-carrier (E1) line in Europe. The T1 line consists of 24 channels, while an E1 has 32. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
published: 25 Aug 2014 -
Bit rate
In telecommunications and computing, bit rate (sometimes written bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of time. The bit rate is quantified using the bits per second unit (symbol bit/s), often in conjunction with an SI prefix such as kilo- (1 kbit/s = 1000 bit/s), mega- (1 Mbit/s = 1000 kbit/s), giga- (1 Gbit/s = 1000 Mbit/s) or tera- (1 Tbit/s = 1000 Gbit/s). The non-standard abbreviation bps is often used to replace the standard symbol bit/s, so that (for example) "1 Mbps" is used to mean one million bits per second. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
published: 17 Aug 2014 -
Dual in-line package
In microelectronics, a dual in-line package, or dual in-line pin package is an electronic component package with a rectangular housing and two parallel rows of electrical connecting pins. The package may be through-hole mounted to a printed circuit board or inserted in a socket. The dual-inline format was invented by Don Forbes, Rex Rice and Bryant Rogers at Fairchild R&D; in 1964, when the restricted number of leads available on circular transistor-style packages became a limitation in the use of integrated circuits. Increasingly complex circuits required more signal and power supply leads; eventually microprocessors and similar complex devices required more leads than could be put on a DIP package, leading to development of higher-density packages. Furthermore, square and rectangular pac...
published: 25 Nov 2015 -
Noise figure
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. It is a number by which the performance of an amplifier or a radio receiver can be specified, with lower values indicating better performance. The noise factor is defined as the ratio of the output noise power of a device to the portion thereof attributable to thermal noise in the input termination at standard noise temperature T0 (usually 290 K). The noise factor is thus the ratio of actual output noise to that which would remain if the device itself did not introduce noise, or the ratio of input SNR to output SNR. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons imag...
published: 15 Nov 2014 -
Computer data storage
Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers. The central processing unit (CPU) of a computer is what manipulates data by performing computations. In practice, almost all computers use a storage hierarchy, which puts fast but expensive and small storage options close to the CPU and slower but larger and cheaper options farther away. Often the fast, volatile technologies (which lose data when powered off) are referred to as "memory", while slower permanent technologies are referred to as "storage", but these terms can also be used interchangeably. In the Von Neumann architecture, the CPU consists of two main parts: control ...
published: 21 Jul 2014 -
Characteristic impedance
The characteristic impedance or surge impedance of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction. Characteristic impedance is determined by the geometry and materials of the transmission line and, for a uniform line, is not dependent on its length. The SI unit of characteristic impedance is the ohm. The characteristic impedance of a lossless transmission line is purely real, with no reactive component. Energy supplied by a source at one end of such a line is transmitted through the line without being dissipated in the line itself. A transmission line of finite length that is terminated at one end with an impedance ...
published: 12 Oct 2015 -
Reflection coefficient
In physics and electrical engineering the reflection coefficient is a parameter that describes how much of an electromagnetic wave is reflected by an impedance discontinuity in the transmission medium. It is equal to the ratio of the amplitude of the reflected wave to the incident wave, with each expressed as phasors. For example, it is used in optics to calculate the amount of light that is reflected from a surface with a different index of refraction, such as a glass surface, or in an electrical transmission line to calculate how much of the electromagnetic wave is reflected by an impedance. The reflection coefficient is closely related to the transmission coefficient. The reflectance of a system is also sometimes called a "reflection coefficient". This video is targeted to blind users...
published: 18 Oct 2015 -
Identification friend or foe
Identification, friend or foe (IFF) is an identification system designed for command and control. It enables military and national (civilian air traffic control) interrogation systems to identify aircraft, vehicles or forces as friendly and to determine their bearing and range from the interrogator. IFF may be used by both military and civilian aircraft. IFF was first developed during World War II. The term is a misnomer, as IFF can only positively identify friendly targets, not hostile ones. If an IFF interrogation receives no reply or an invalid reply, the object cannot be identified as friendly, but is not positively identified as foe. There are many reasons that friendly aircraft may not properly reply to IFF. This video is targeted to blind users. Attribution: Article text availabl...
published: 08 Nov 2014 -
Transducer
A transducer is a device that converts a signal in one form of energy to another form of energy. Energy types include (but are not limited to) electrical, mechanical, electromagnetic (including light), chemical, acoustic and thermal energy. While the term transducer commonly implies the use of a sensor/detector, any device which converts energy can be considered a transducer. Transducers are widely used in measuring instruments. A sensor is used to detect a parameter in one form and report it in another form of energy, often an electrical signal. For example, a pressure sensor might detect pressure (a mechanical form of energy) and convert it to electrical signal for display at a remote gauge. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Crea...
published: 02 Aug 2014 -
Rise time
In electronics, when describing a voltage or current step function, rise time is the time taken by a signal to change from a specified low value to a specified high value. Typically, in analog electronics, these values are 10% and 90% of the step height: in control theory applications, according to Levine (1996, p. 158), rise time is defined as "the time required for the response to rise from x% to y% of its final value", with 0%-100% rise time common for underdamped second order systems, 5%-95% for critically damped and 10%-90% for overdamped. The output signal of a system is characterized also by fall time: both parameters depend on rise and fall times of input signal and on the characteristics of the system. This video is targeted to blind users. Attribution: Article text available u...
published: 14 Nov 2014
Primary Rate Interface
- Order: Reorder
- Duration: 4:09
- Updated: 25 Aug 2014
- views: 208
The Primary Rate Interface (PRI) is a standardized telecommunications service level within the Integrated Services Digital Network (ISDN) specification for carr...
The Primary Rate Interface (PRI) is a standardized telecommunications service level within the Integrated Services Digital Network (ISDN) specification for carrying multiple DS0 voice and data transmissions between a network and a user.
PRI is the standard for providing telecommunication services to offices. It is based on the T-carrier (T1) line in the US and Canada, and the E-carrier (E1) line in Europe. The T1 line consists of 24 channels, while an E1 has 32.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
wn.com/Primary Rate Interface
The Primary Rate Interface (PRI) is a standardized telecommunications service level within the Integrated Services Digital Network (ISDN) specification for carrying multiple DS0 voice and data transmissions between a network and a user.
PRI is the standard for providing telecommunication services to offices. It is based on the T-carrier (T1) line in the US and Canada, and the E-carrier (E1) line in Europe. The T1 line consists of 24 channels, while an E1 has 32.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
- published: 25 Aug 2014
- views: 208
Bit rate
- Order: Reorder
- Duration: 17:00
- Updated: 17 Aug 2014
- views: 166
In telecommunications and computing, bit rate (sometimes written bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of ti...
In telecommunications and computing, bit rate (sometimes written bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of time.
The bit rate is quantified using the bits per second unit (symbol bit/s), often in conjunction with an SI prefix such as kilo- (1 kbit/s = 1000 bit/s), mega- (1 Mbit/s = 1000 kbit/s), giga- (1 Gbit/s = 1000 Mbit/s) or tera- (1 Tbit/s = 1000 Gbit/s). The non-standard abbreviation bps is often used to replace the standard symbol bit/s, so that (for example) "1 Mbps" is used to mean one million bits per second.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
wn.com/Bit Rate
In telecommunications and computing, bit rate (sometimes written bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of time.
The bit rate is quantified using the bits per second unit (symbol bit/s), often in conjunction with an SI prefix such as kilo- (1 kbit/s = 1000 bit/s), mega- (1 Mbit/s = 1000 kbit/s), giga- (1 Gbit/s = 1000 Mbit/s) or tera- (1 Tbit/s = 1000 Gbit/s). The non-standard abbreviation bps is often used to replace the standard symbol bit/s, so that (for example) "1 Mbps" is used to mean one million bits per second.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
- published: 17 Aug 2014
- views: 166
Dual in-line package
- Order: Reorder
- Duration: 19:27
- Updated: 25 Nov 2015
- views: 81
In microelectronics, a dual in-line package, or dual in-line pin package is an electronic component package with a rectangular housing and two parallel rows of ...
In microelectronics, a dual in-line package, or dual in-line pin package is an electronic component package with a rectangular housing and two parallel rows of electrical connecting pins. The package may be through-hole mounted to a printed circuit board or inserted in a socket. The dual-inline format was invented by Don Forbes, Rex Rice and Bryant Rogers at Fairchild R&D; in 1964, when the restricted number of leads available on circular transistor-style packages became a limitation in the use of integrated circuits. Increasingly complex circuits required more signal and power supply leads; eventually microprocessors and similar complex devices required more leads than could be put on a DIP package, leading to development of higher-density packages. Furthermore, square and rectangular packages made it easier to route printed-circuit traces beneath the packages.
A DIP is usually referred to as a DIPn, where n is the total number of pins. For example, a microcircuit package with two rows of seven vertical leads would be a DIP14. The photograph at the upper right shows three DIP14 ICs. Common packages have as few as four and as many as 64 leads. Many analog and digital integrated circuit types are available in DIP packages, as are arrays of transistors, switches, light emitting diodes, and resistors. DIP plugs for ribbon cables can be used with standard IC sockets.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
wn.com/Dual In Line Package
In microelectronics, a dual in-line package, or dual in-line pin package is an electronic component package with a rectangular housing and two parallel rows of electrical connecting pins. The package may be through-hole mounted to a printed circuit board or inserted in a socket. The dual-inline format was invented by Don Forbes, Rex Rice and Bryant Rogers at Fairchild R&D; in 1964, when the restricted number of leads available on circular transistor-style packages became a limitation in the use of integrated circuits. Increasingly complex circuits required more signal and power supply leads; eventually microprocessors and similar complex devices required more leads than could be put on a DIP package, leading to development of higher-density packages. Furthermore, square and rectangular packages made it easier to route printed-circuit traces beneath the packages.
A DIP is usually referred to as a DIPn, where n is the total number of pins. For example, a microcircuit package with two rows of seven vertical leads would be a DIP14. The photograph at the upper right shows three DIP14 ICs. Common packages have as few as four and as many as 64 leads. Many analog and digital integrated circuit types are available in DIP packages, as are arrays of transistors, switches, light emitting diodes, and resistors. DIP plugs for ribbon cables can be used with standard IC sockets.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
- published: 25 Nov 2015
- views: 81
Noise figure
- Order: Reorder
- Duration: 4:29
- Updated: 15 Nov 2014
- views: 1130
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio frequency (RF) signal cha...
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. It is a number by which the performance of an amplifier or a radio receiver can be specified, with lower values indicating better performance.
The noise factor is defined as the ratio of the output noise power of a device to the portion thereof attributable to thermal noise in the input termination at standard noise temperature T0 (usually 290 K). The noise factor is thus the ratio of actual output noise to that which would remain if the device itself did not introduce noise, or the ratio of input SNR to output SNR.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
wn.com/Noise Figure
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. It is a number by which the performance of an amplifier or a radio receiver can be specified, with lower values indicating better performance.
The noise factor is defined as the ratio of the output noise power of a device to the portion thereof attributable to thermal noise in the input termination at standard noise temperature T0 (usually 290 K). The noise factor is thus the ratio of actual output noise to that which would remain if the device itself did not introduce noise, or the ratio of input SNR to output SNR.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
- published: 15 Nov 2014
- views: 1130
Computer data storage
- Order: Reorder
- Duration: 34:30
- Updated: 21 Jul 2014
- views: 217
Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. It is ...
Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers. The central processing unit (CPU) of a computer is what manipulates data by performing computations. In practice, almost all computers use a storage hierarchy, which puts fast but expensive and small storage options close to the CPU and slower but larger and cheaper options farther away. Often the fast, volatile technologies (which lose data when powered off) are referred to as "memory", while slower permanent technologies are referred to as "storage", but these terms can also be used interchangeably. In the Von Neumann architecture, the CPU consists of two main parts: control unit and arithmetic logic unit (ALU). The former controls the flow of data between the CPU and memory; the latter performs arithmetic and logical operations on data.
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Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers. The central processing unit (CPU) of a computer is what manipulates data by performing computations. In practice, almost all computers use a storage hierarchy, which puts fast but expensive and small storage options close to the CPU and slower but larger and cheaper options farther away. Often the fast, volatile technologies (which lose data when powered off) are referred to as "memory", while slower permanent technologies are referred to as "storage", but these terms can also be used interchangeably. In the Von Neumann architecture, the CPU consists of two main parts: control unit and arithmetic logic unit (ALU). The former controls the flow of data between the CPU and memory; the latter performs arithmetic and logical operations on data.
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- published: 21 Jul 2014
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Characteristic impedance
- Order: Reorder
- Duration: 4:56
- Updated: 12 Oct 2015
- views: 629
The characteristic impedance or surge impedance of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagatin...
The characteristic impedance or surge impedance of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction. Characteristic impedance is determined by the geometry and materials of the transmission line and, for a uniform line, is not dependent on its length. The SI unit of characteristic impedance is the ohm.
The characteristic impedance of a lossless transmission line is purely real, with no reactive component. Energy supplied by a source at one end of such a line is transmitted through the line without being dissipated in the line itself. A transmission line of finite length that is terminated at one end with an impedance equal to the characteristic impedance appears to the source like an infinitely long transmission line and produces no reflections.
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The characteristic impedance or surge impedance of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction. Characteristic impedance is determined by the geometry and materials of the transmission line and, for a uniform line, is not dependent on its length. The SI unit of characteristic impedance is the ohm.
The characteristic impedance of a lossless transmission line is purely real, with no reactive component. Energy supplied by a source at one end of such a line is transmitted through the line without being dissipated in the line itself. A transmission line of finite length that is terminated at one end with an impedance equal to the characteristic impedance appears to the source like an infinitely long transmission line and produces no reflections.
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- published: 12 Oct 2015
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Reflection coefficient
- Order: Reorder
- Duration: 3:38
- Updated: 18 Oct 2015
- views: 315
In physics and electrical engineering the reflection coefficient is a parameter that describes how much of an electromagnetic wave is reflected by an impedance ...
In physics and electrical engineering the reflection coefficient is a parameter that describes how much of an electromagnetic wave is reflected by an impedance discontinuity in the transmission medium. It is equal to the ratio of the amplitude of the reflected wave to the incident wave, with each expressed as phasors. For example, it is used in optics to calculate the amount of light that is reflected from a surface with a different index of refraction, such as a glass surface, or in an electrical transmission line to calculate how much of the electromagnetic wave is reflected by an impedance. The reflection coefficient is closely related to the transmission coefficient. The reflectance of a system is also sometimes called a "reflection coefficient".
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In physics and electrical engineering the reflection coefficient is a parameter that describes how much of an electromagnetic wave is reflected by an impedance discontinuity in the transmission medium. It is equal to the ratio of the amplitude of the reflected wave to the incident wave, with each expressed as phasors. For example, it is used in optics to calculate the amount of light that is reflected from a surface with a different index of refraction, such as a glass surface, or in an electrical transmission line to calculate how much of the electromagnetic wave is reflected by an impedance. The reflection coefficient is closely related to the transmission coefficient. The reflectance of a system is also sometimes called a "reflection coefficient".
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- published: 18 Oct 2015
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Identification friend or foe
- Order: Reorder
- Duration: 8:33
- Updated: 08 Nov 2014
- views: 1561
Identification, friend or foe (IFF) is an identification system designed for command and control. It enables military and national (civilian air traffic control...
Identification, friend or foe (IFF) is an identification system designed for command and control. It enables military and national (civilian air traffic control) interrogation systems to identify aircraft, vehicles or forces as friendly and to determine their bearing and range from the interrogator. IFF may be used by both military and civilian aircraft.
IFF was first developed during World War II. The term is a misnomer, as IFF can only positively identify friendly targets, not hostile ones. If an IFF interrogation receives no reply or an invalid reply, the object cannot be identified as friendly, but is not positively identified as foe. There are many reasons that friendly aircraft may not properly reply to IFF.
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Identification, friend or foe (IFF) is an identification system designed for command and control. It enables military and national (civilian air traffic control) interrogation systems to identify aircraft, vehicles or forces as friendly and to determine their bearing and range from the interrogator. IFF may be used by both military and civilian aircraft.
IFF was first developed during World War II. The term is a misnomer, as IFF can only positively identify friendly targets, not hostile ones. If an IFF interrogation receives no reply or an invalid reply, the object cannot be identified as friendly, but is not positively identified as foe. There are many reasons that friendly aircraft may not properly reply to IFF.
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- published: 08 Nov 2014
- views: 1561
Transducer
- Order: Reorder
- Duration: 5:13
- Updated: 02 Aug 2014
- views: 1220
A transducer is a device that converts a signal in one form of energy to another form of energy. Energy types include (but are not limited to) electrical, mecha...
A transducer is a device that converts a signal in one form of energy to another form of energy. Energy types include (but are not limited to) electrical, mechanical, electromagnetic (including light), chemical, acoustic and thermal energy. While the term transducer commonly implies the use of a sensor/detector, any device which converts energy can be considered a transducer. Transducers are widely used in measuring instruments.
A sensor is used to detect a parameter in one form and report it in another form of energy, often an electrical signal. For example, a pressure sensor might detect pressure (a mechanical form of energy) and convert it to electrical signal for display at a remote gauge.
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A transducer is a device that converts a signal in one form of energy to another form of energy. Energy types include (but are not limited to) electrical, mechanical, electromagnetic (including light), chemical, acoustic and thermal energy. While the term transducer commonly implies the use of a sensor/detector, any device which converts energy can be considered a transducer. Transducers are widely used in measuring instruments.
A sensor is used to detect a parameter in one form and report it in another form of energy, often an electrical signal. For example, a pressure sensor might detect pressure (a mechanical form of energy) and convert it to electrical signal for display at a remote gauge.
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- published: 02 Aug 2014
- views: 1220
Rise time
- Order: Reorder
- Duration: 7:35
- Updated: 14 Nov 2014
- views: 134
In electronics, when describing a voltage or current step function, rise time is the time taken by a signal to change from a specified low value to a specified ...
In electronics, when describing a voltage or current step function, rise time is the time taken by a signal to change from a specified low value to a specified high value. Typically, in analog electronics, these values are 10% and 90% of the step height: in control theory applications, according to Levine (1996, p. 158), rise time is defined as "the time required for the response to rise from x% to y% of its final value", with 0%-100% rise time common for underdamped second order systems, 5%-95% for critically damped and 10%-90% for overdamped. The output signal of a system is characterized also by fall time: both parameters depend on rise and fall times of input signal and on the characteristics of the system.
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In electronics, when describing a voltage or current step function, rise time is the time taken by a signal to change from a specified low value to a specified high value. Typically, in analog electronics, these values are 10% and 90% of the step height: in control theory applications, according to Levine (1996, p. 158), rise time is defined as "the time required for the response to rise from x% to y% of its final value", with 0%-100% rise time common for underdamped second order systems, 5%-95% for critically damped and 10%-90% for overdamped. The output signal of a system is characterized also by fall time: both parameters depend on rise and fall times of input signal and on the characteristics of the system.
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- published: 14 Nov 2014
- views: 134
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Access control
In the fields of physical security and information security, access control is the selective restriction of access to a place or other resource. The act of accessing may mean consuming, entering, or using. Permission to access a resource is called authorization. Locks and login credentials are two analogous mechanisms of access control. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
published: 16 Aug 2014 -
Ground (electricity)
In electrical engineering, ground or earth can refer to the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth. Electrical circuits may be connected to ground (earth) for several reasons. In mains powered equipment, exposed metal parts are connected to ground to prevent user contact with dangerous voltage if electrical insulation fails. Connections to ground limit the build-up of static electricity when handling flammable products or electrostatic-sensitive devices. In some telegraph and power transmission circuits, the earth itself can be used as one conductor of the circuit, saving the cost of installing a separate return conductor (see single-wire earth return). This video i...
published: 11 Aug 2014 -
Surface wave
In physics, a surface wave is a mechanical wave that propagates along the interface between differing media, usually as a gravity wave between two fluids with different densities. A surface wave can also be an elastic wave, such as with a Rayleigh or Love wave. It can also be an electromagnetic wave guided by a refractive index gradient. In radio transmission, a ground wave is a surface wave that propagates close to the surface of the Earth. com This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
published: 06 Jan 2016
Access control
- Order: Reorder
- Duration: 32:56
- Updated: 16 Aug 2014
- views: 27
In the fields of physical security and information security, access control is the selective restriction of access to a place or other resource. The act of acce...
In the fields of physical security and information security, access control is the selective restriction of access to a place or other resource. The act of accessing may mean consuming, entering, or using. Permission to access a resource is called authorization.
Locks and login credentials are two analogous mechanisms of access control.
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In the fields of physical security and information security, access control is the selective restriction of access to a place or other resource. The act of accessing may mean consuming, entering, or using. Permission to access a resource is called authorization.
Locks and login credentials are two analogous mechanisms of access control.
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- published: 16 Aug 2014
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Ground (electricity)
- Order: Reorder
- Duration: 21:40
- Updated: 11 Aug 2014
- views: 3480
In electrical engineering, ground or earth can refer to the reference point in an electrical circuit from which voltages are measured, a common return path for ...
In electrical engineering, ground or earth can refer to the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth.
Electrical circuits may be connected to ground (earth) for several reasons. In mains powered equipment, exposed metal parts are connected to ground to prevent user contact with dangerous voltage if electrical insulation fails. Connections to ground limit the build-up of static electricity when handling flammable products or electrostatic-sensitive devices. In some telegraph and power transmission circuits, the earth itself can be used as one conductor of the circuit, saving the cost of installing a separate return conductor (see single-wire earth return).
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In electrical engineering, ground or earth can refer to the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth.
Electrical circuits may be connected to ground (earth) for several reasons. In mains powered equipment, exposed metal parts are connected to ground to prevent user contact with dangerous voltage if electrical insulation fails. Connections to ground limit the build-up of static electricity when handling flammable products or electrostatic-sensitive devices. In some telegraph and power transmission circuits, the earth itself can be used as one conductor of the circuit, saving the cost of installing a separate return conductor (see single-wire earth return).
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- published: 11 Aug 2014
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Surface wave
- Order: Reorder
- Duration: 23:13
- Updated: 06 Jan 2016
- views: 23
In physics, a surface wave is a mechanical wave that propagates along the interface between differing media, usually as a gravity wave between two fluids with d...
In physics, a surface wave is a mechanical wave that propagates along the interface between differing media, usually as a gravity wave between two fluids with different densities. A surface wave can also be an elastic wave, such as with a Rayleigh or Love wave. It can also be an electromagnetic wave guided by a refractive index gradient. In radio transmission, a ground wave is a surface wave that propagates close to the surface of the Earth. com
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In physics, a surface wave is a mechanical wave that propagates along the interface between differing media, usually as a gravity wave between two fluids with different densities. A surface wave can also be an elastic wave, such as with a Rayleigh or Love wave. It can also be an electromagnetic wave guided by a refractive index gradient. In radio transmission, a ground wave is a surface wave that propagates close to the surface of the Earth. com
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- published: 06 Jan 2016
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Primary Rate Interface
The Primary Rate Interface (PRI) is a standardized telecommunications service level within...
published: 25 Aug 2014
Primary Rate Interface
Primary Rate Interface
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- published: 25 Aug 2014
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17:00
Bit rate
In telecommunications and computing, bit rate (sometimes written bitrate or as a variable ...
published: 17 Aug 2014
Bit rate
Bit rate
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19:27
Dual in-line package
In microelectronics, a dual in-line package, or dual in-line pin package is an electronic ...
published: 25 Nov 2015
Dual in-line package
Dual in-line package
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4:29
Noise figure
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ...
published: 15 Nov 2014
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34:30
Computer data storage
Computer data storage, often called storage or memory, is a technology consisting of compu...
published: 21 Jul 2014
Computer data storage
Computer data storage
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4:56
Characteristic impedance
The characteristic impedance or surge impedance of a uniform transmission line is the rati...
published: 12 Oct 2015
Characteristic impedance
Characteristic impedance
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3:38
Reflection coefficient
In physics and electrical engineering the reflection coefficient is a parameter that descr...
published: 18 Oct 2015
Reflection coefficient
Reflection coefficient
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8:33
Identification friend or foe
Identification, friend or foe (IFF) is an identification system designed for command and c...
published: 08 Nov 2014
Identification friend or foe
Identification friend or foe
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5:13
Transducer
A transducer is a device that converts a signal in one form of energy to another form of e...
published: 02 Aug 2014
Transducer
Transducer
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7:35
Rise time
In electronics, when describing a voltage or current step function, rise time is the time ...
published: 14 Nov 2014
Rise time
Rise time
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32:56
Access control
In the fields of physical security and information security, access control is the selecti...
published: 16 Aug 2014
Access control
Access control
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21:40
Ground (electricity)
In electrical engineering, ground or earth can refer to the reference point in an electric...
published: 11 Aug 2014
Ground (electricity)
Ground (electricity)
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23:13
Surface wave
In physics, a surface wave is a mechanical wave that propagates along the interface betwee...
published: 06 Jan 2016
Surface wave
Surface wave
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World entering era 'more dangerous than Cold War' as Russian power grows, former MI6 boss warns
Edit The Independent 12 Oct 2016
The world is entering an era that is "more dangerous" than the Cold War because of an increase in Russian military power, a former MI6 chief has said ... In pictures....
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North Korea purges vice foreign minister: Report
Edit The Times of India 12 Oct 2016
SEOUL. North Korea has purged its vice foreign minister as punishment for the recent defection of the nuclear-armed country's deputy ambassador to Britain, South Korean media reported Wednesday. The mass-circulation JoongAng Ilbo, quoting an anonymous source familiar with North Korean affairs, said that Kung Sok-Ung had been removed from his post and expelled from Pyongyang to a rural farming area with his family ... RELATED....
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US election: Obama blasts Trump with 7-Eleven jibe
Edit The Oslo Times 12 Oct 2016
Oct.12, Washington ... He was particularly scathing about House Speaker Paul Ryan whom he described as a "weak and ineffective" leader....
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More Bad Poll News For Donald Trump
Edit WorldNews.com 12 Oct 2016
The latest Reuters/Ipsos opinion poll has Donald Trump falling behind Hillary Clinton by 8 points among likely voters as of Tuesday evening ... Reactions against the debate overall had Clinton winning at 53 percent with Trump at 32 percent but the results were even starker for party lines with Democrats at 82 percent feeling Clinton winning with only 68 percent of Republicans viewing Trump as the winner ... -WN.com, Maureen Foody....
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Western contact with China began long before Marco Polo, experts say
Edit BBC News 12 Oct 2016
China and the West were in contact more than 1,500 years before European explorer Marco Polo arrived in China, new finds suggest. Archaeologists say inspiration for the Terracotta Warriors, found at the Tomb of the First Emperor near today's Xian, may have come from Ancient Greece. They also say ancient Greek artisans could have been training locals there in the Third Century BC ... ....
Rules Concerning Voter Registration Applications Submitted Without Proof of Citizenship (Grant County, KS)
Edit Public Technologies 12 Oct 2016
Due to recent court rulings, if you have applied to register to vote at a Kansas Division of Motor Vehicles office or if you have applied to register to vote using the 'Federal Form' voter registration application (as opposed to the standard 'state form') and have not yet provided proof of citizenship, you are registered to vote for the November 8, 2016, general election....
The refereeing training centre has opened (Russian Ice Hockey Federation)
Edit Public Technologies 12 Oct 2016
Russian Ice Hockey Federation). On the 12th of October inside the Moscow Ice Hockey Federation's headquarters, the official opening of the refereeing training centre took place. The idea of the centre was organised by both the Moscow and Russian Ice Hockey Federations ... It's standard ... Russian Ice Hockey Federation. Russian Ice Hockey Federation published ......
Real ID ACT: States, territories granted 90-day delay (Fort Myer, VA)
Edit Public Technologies 12 Oct 2016
The federal Real ID Act of 2005 created new standards for driver's licenses and identification cards. ID cards from some states do not meet these standards and cannot be used as primary forms of ID to access Joint Base Myer-Henderson Hall and other federal installations ... This includes standard (not EDL -- Enhanced Driver's Licenses) from Washington State, Minnesota, Missouri and American Samoa....
Federal Council approves report on illicit financial flows from developing countries (Swiss Federal Council)
Edit Public Technologies 12 Oct 2016
Swiss Federal Council). Bern, 12.10.2016 - Today, the Federal Council approved the report on illicit financial flows from developing countries ... The Federal Council is aware of the challenges associated with this topic and continues to be prepared to contribute actively to the formulation of solutions at the international level ... The Federal Council....
Village Water Passes EPA Standards (Village of North Riverside, IL)
Edit Public Technologies 12 Oct 2016
Per Federal EPA requirements, the Village of North Riverside was required to conduct 30 Lead samples at pre-determined sites that were approved by the Illinois EPA ... standards set by the EPA ... All samples taken passed the EPA standards....
Maine Department of Labor Announces Rulemaking to Conform to Federal Overtime Rule Changes (Maine CareerCenter)
Edit Public Technologies 12 Oct 2016
AUGUSTA-The Wage and Hour Division of the Maine Department of Labor's Bureau of Labor Standards has proposed changes to the state's rules affecting ... Maine statute incorporates the salary exemptions to overtime by reference to the federal Fair Labor Standards Act in Title 26, Chapter 7, �663-3, and the changes will apply to all employers in the state....
Rand still reeling from shock of Hawks’ action against Pravin Gordhan
Edit Business Day 12 Oct 2016
TreasuryOne currency dealer Andre Botha said even though the market was focused on the release of the US Federal Reserve’s federal open market committee minutes, "the rand show" gave much to ponder after the National Prosecuting Authority charged Gordhan....
Maine Department of Labor Announces Rulemaking to Conform to Federal Overtime Rule Changes (MDOL - Maine Department of Labor)
Edit Public Technologies 12 Oct 2016
AUGUSTA-The Wage and Hour Division of the Maine Department of Labor's Bureau of Labor Standards has proposed changes to the state's rules affecting ... Maine statute incorporates the salary exemptions to overtime by reference to the federal Fair Labor Standards Act in Title 26, Chapter 7, �663-3, and the changes will apply to all employers in the state....
TRS-Care Update (Texas American Federation of Teachers)
Edit Public Technologies 12 Oct 2016
Texas American Federation of Teachers) ... Changes to TRS-Care standard plans became effective September 1, 2016 ... Texas American Federation of Teachers published this content on 10 October 2016 and is solely responsible for the information contained herein....
OSHA cites Omega Demolition Corp. after worker fatally crushed by 40-ton beam on I-90 bridge construction project in Des Plaines (US Department of Labor)
Edit Public Technologies 12 Oct 2016
CHICAGO - A federal investigation has determined that an overstressed 40-ton beam fell and caused the death of a 47-year-old laborer doing demolition of Chicago's Interstate 90 and Touhy Road overpass in April ... 'Federal safety standards for demolition address specific procedures for preventing steel structures from being overstressed, a safety violation that directly contributed to the death of this worker.'....
Court shuts down latest bid to deport Toronto man accused of terror links
Edit Toronto Sun 12 Oct 2016
An appeal court has rejected the federal government’s latest legal salvo in a long-standing bid to deport a Toronto man over alleged terrorist ties ... The government asked the Federal Court of Appeal to overturn her ruling and uphold the certificate ... Federal lawyers argued that Hansen had made several errors, including reliance on a higher standard of proof than necessary in weighing the evidence....
Maine Department of Labor Announces Rulemaking to Conform to Federal Overtime Rule Changes (State of Maine)
Edit Public Technologies 12 Oct 2016
AUGUSTA-The Wage and Hour Division of the Maine Department of Labor's Bureau of Labor Standards has proposed changes to the state's rules affecting ... Maine statute incorporates the salary exemptions to overtime by reference to the federal Fair Labor Standards Act in Title 26, Chapter 7, �663-3, and the changes will apply to all employers in the state....
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