- Socket G3

Socket G3 Type LGA Contacts 1305 FSB protocol ? FSB frequency 200 MHz System clock max 2.6 GHz HyperTransport 3.0 Voltage range ? Processors N/A (never released) This article is part of the CPU socket series The Socket G3, originally as part of the codenamed Piranha server platform, was supposed to be the intermediate successor to Socket F and Socket F+ to be used in AMD Opteron processor for dual-processor (2P) and above server platforms scheduled to be launched 2009. The Socket G3 would have been accompanied by the Socket G3 Memory Extender (Socket G3MX), for connecting large amounts of memory to a single microprocessor by a G3MX chip placed on the motherboard. AMD had planned socket G3 to arrive with the advent of the previously planned 8-core MCM chip code named Montreal. Since Q1 2008, the plan for and 8-core MCM server chip based on 45 nm K10.5 design has been scrapped in favor of a 6-core fully-integrated MPU design code named Istanbul, which will use the [read more...]

- Book type

The book type is a field of four bits at the start of every DVD (in the physical format information section of the control data block) that indicates what the physical format of the disc is. Many devices will use this "Book Type Field" to determine how the disc should be treated. One common cause of compatibility problems is the failure of a device to recognize the book type of the disc that has been loaded, most likely as a result of the device being manufactured before that particular book type has been defined. (E.g., most DVD playback devices made before mid-2004 will not recognize the relatively new DVD+R DL Book Type). For DVD+R, DVD+RW, and DVD+R DL discs, it is possible to change the Book Type field value to the value for DVD-ROM (or in some rare and unorthodox cases, even the value for DVD-R) in order to fool older devices that do not recognize newer Book Type Field values (this process is known as bitsetting). These are the possible values of the Book Type Field: Value [read more...]

- Dumaresq

The Dumaresq is a mechanical calculating device invented around 1902 by Lieutenant John Dumaresq of the Royal Navy. The dumaresq is an analog computer which relates vital variables of the fire control problem to the movement of one's own ship and that of a target ship. It was often used with other devices, such as a Vickers range clock to generate range and deflection data so the gun sights of the ship could be continuously set. A number of versions of the Dumaresq were produced of increasing complexity as development proceeded. Geometric Principle The dumaresq relies on sliding and rotating bars and dials to calculate the relative motion of the enemy ship and to convert this into a "range rate" (the component of motion along the line of bearing) and "dumaresq deflection" (or "speed across" .. the component perpendicular to the range rate). Because the dumaresq is an analog or model of the relative motion of the two ships, it does not intrinsically favor which of its settings is an [read more...]


TIFRAC (Tata Institute of Fundamental Research Automatic Calculator) was the first computer developed in India, at the Tata Institute of Fundamental Research in Mumbai. Initially a TIFR Pilot Machine was developed in the 1950s. It was started in 1955 and commissioned in November 1956. The full TIFRAC machine was in use in the early 1960s (until 1965). It was started in 1957 and commissioned in February 1960. It included 2,700 vacuum tubes, 1,700 germanium diodes and 12,500 resistors. It had 2,048 40-bit words of memory. Both machines were early adoptors of ferrite core memory. [read more...]

- MeWa

MeWa MeWa in action Developer(s) Shu Shen Stable release 1.4.0 / June 6, 2007 Operating system Windows Type LaTeX License GPL Website sourceforge.net/projects/mewa MeWa is a LaTeX editor for Windows. It was previously called LaTeXEditor. MeWa works well with the MiKTeX distribution and comes with a spell checker. [read more...]

- Fiber disk laser

A fiber disk laser is a fiber laser with transverse delivery of the pump light. They are characterized by the pump beam not being parallel to the active core of the optical fiber (as in a double-clad fiber), but directed to the coil of the fiber at an angle (usually, between 10 and 40 degrees). This allows use of the specific shape of the pump beam emitted by the laser diode, providing the efficient use of the pump. Fiber disk lasers should not be confused with the laser disks (disk-shaped devices for storage and reading of information with laser beam) nor the disk laser or "active mirror", which is a laser with a thin active layer where the heat sink is realized in a direction opposite to that of propagation of the output beam. Realizations of fiber disk lasers First disk lasers were developed in the Institute for Laser Science, Japan. Several realizations of fiber disk lasers were reported. The fiber disk laser is so named because the fiber is tightly coiled. Typically, no [read more...]

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Apollo Guidance Computer closeup

Apollo Guidance Computer components

Apollo Guidance Computer keyboard