Thursday, January 1, 2015

intel history

January 01, 2015 0 Comments

Intel Corporation is an American multinational corporation headquartered in Santa Clara, California. Intel is one of the world's largest and highest valued semiconductor chip makers, based on revenue. It is the inventor of the x86 series of microprocessors, the processors found in most personal computers.

Intel Corporation, founded on July 18, 1968, is a portmanteau of Integrated Electronics (the fact that "intel" is the term for intelligence information also made the name appropriate). Intel also makes motherboard chipsets, network interface controllers and integrated circuits, flash memory, graphic chips, embedded processors and other devices related to communications and computing. Founded by semiconductor pioneers Robert Noyce and Gordon Moore and widely associated with the executive leadership and vision of Andrew Grove, Intel combines advanced chip design capability with a leading-edge manufacturing capability. Though Intel was originally known primarily to engineers and technologists, its "Intel Inside" advertising campaign of the 1990s made it a household name, along with its Pentium processors.

Intel was an early developer of SRAM and DRAM memory chips, and this represented the majority of its business until 1981. Although Intel created the world's first commercial microprocessor chip in 1971, it was not until the success of the personal computer (PC) that this became its primary business. During the 1990s, Intel invested heavily in new microprocessor designs fostering the rapid growth of the computer industry. During this period Intel became the dominant supplier of microprocessors for PCs, and was known for aggressive and sometimes illegal tactics in defense of its market position, particularly against Advanced Micro Devices (AMD), as well as a struggle with Microsoft for control over the direction of the PC industry.

The 2013 rankings of the world's 100 most valuable brands published by Millward Brown Optimor showed the company's brand value at number 61.

Intel has also begun research into electrical transmission and generation. Intel has recently introduced a 3-D transistor that improves performance and energy efficiency. Intel has begun mass-producing this 3-D transistor, named the Tri-Gate transistor, with their 22 nm process, which is currently used in their 3rd generation core processors initially released on April 29, 201 In 2011, SpectraWatt Inc., a solar cell spinoff of Intel, filed for bankruptcy under Chapter 11. In June 2013, Intel unveiled its fourth generation of Intel Core processors (Haswell) in an event named Computex in Taipei.

The Open Source Technology Center at Intel hosts PowerTOP and LatencyTOP, and supports other open-source projects such as Wayland, Intel Array Building Blocks, Threading Building Blocks (TBB), and Xen

Corporate history
Origins
Andy Grove, Robert Noyce and Gordon Moore (1978)
The old Intel logo used from July 18, 1968 until December 2005

Intel was originally founded in Mountain View, California in 1968 by Gordon E. Moore (of "Moore's Law" fame), a chemist, and Robert Noyce, a physicist and co-inventor of the integrated circuit. Arthur Rock (investor and venture capitalist) helped them find investors, while Max Palevsky was on the board from an early stage. Moore and Noyce had left Fairchild Semiconductor to found Intel. Rock was not an employee, but he was an investor and was chairman of the board. The total initial investment in Intel was $2.5 million convertible debentures and $10,000 from Rock. Just 2 years later, Intel completed their initial public offering (IPO), raising $6.8 million ($23.50 per share).Intel's third employee was Andy Grove, a chemical engineer, who later ran the company through much of the 1980s and the high-growth 1990s.

In deciding on a name, Moore and Noyce quickly rejected "Moore Noyce", homophone for "more noise" – an ill-suited name for an electronics company, since noise in electronics is usually very undesirable and typically associated with bad interference. Instead they used the name NM Electronics before renaming their company Integrated Electronics or "Intel" for short. Since "Intel" was already trademarked by the hotel chain Intelco, they had to buy the rights for the name.
Early history

At its founding, Intel was distinguished by its ability to make semiconductors. Its first product, in 1969, was the 3101 Schottky TTL bipolar 64-bit static random-access memory (SRAM), which was nearly twice as fast as earlier Schottky diode implementations by Fairchild and the Electrotechnical Laboratory in Tsukuba, Japan. In the same year Intel also produced the 3301 Schottky bipolar 1024-bit read-only memory (ROM) and the first commercial metal–oxide–semiconductor field-effect transistor (MOSFET) silicon gate SRAM chip, the 256-bit 1101. Intel's business grew during the 1970s as it expanded and improved its manufacturing processes and produced a wider range of products, still dominated by various memory devices.
Federico Faggin, the designer of Intel 4004.

While Intel created the first commercially available microprocessor (Intel 4004) in 1971 and one of the first microcomputers in 1972, by the early 1980s its business was dominated by dynamic random-access memory chips. However, increased competition from Japanese semiconductor manufacturers had, by 1983, dramatically reduced the profitability of this market. The growing success of the IBM personal computer, based on an Intel microprocessor, was among factors that convinced Gordon Moore (CEO since 1975) to shift the company's focus to microprocessors, and to change fundamental aspects of that business model. Moore's decision to sole-source Intel's 386 chip played into the company's continuing success.

By the end of the 1980s, buoyed by its fortuitous position as microprocessor supplier to IBM and IBM's competitors within the rapidly growing personal computer market, Intel embarked on a 10-year period of unprecedented growth as the primary (and most profitable) hardware supplier to the PC industry, part of the winning 'Wintel' combination. Moore handed over to Andy Grove in 1987. By launching its Intel Inside marketing campaign in 1991, Intel was able to associate brand loyalty with consumer selection, so that by the end of the 1990s, its line of Pentium processors had become a household name.
Slowing demand and challenges to dominance

After 2000, growth in demand for high-end microprocessors slowed. Competitors, notably AMD (Intel's largest competitor in its primary x86 architecture market), garnered significant market share, initially in low-end and mid-range processors but ultimately across the product range, and Intel's dominant position in its core market was greatly reduced. In the early 2000s then-CEO Craig Barrett attempted to diversify the company's business beyond semiconductors, but few of these activities were ultimately successful.

Intel had also for a number of years been embroiled in litigation. US law did not initially recognize intellectual property rights related to microprocessor topology (circuit layouts), until the Semiconductor Chip Protection Act of 1984, a law sought by Intel and the Semiconductor Industry Association (SIA). During the late 1980s and 1990s (after this law was passed) Intel also sued companies that tried to develop competitor chips to the 80386 CPU.[32] The lawsuits were noted to significantly burden the competition with legal bills, even if Intel lost the suits Antitrust allegations had been simmering since the early 1990s and had been the cause of one lawsuit against Intel in 1991. In 2004 and 2005, AMD brought further claims against Intel related to unfair competition.

In 2005, CEO Paul Otellini reorganized the company to refocus its core processor and chipset business on platforms (enterprise, digital home, digital health, and mobility). In 2013, Intel partnered with Medopad, an enterprise mobile health solution provider to support the deployment of Medopad across the 60+ BMI Healthcare hospitals.
Regaining of momentum
In 2007, Intel unveiled its Core microarchitecture to widespread critical acclaim;the product range was perceived as an exceptional leap in processor performance that at a stroke regained much of its leadership of the field. In 2008, Intel had another "tick," when it introduced the Penryn microarchitecture, which was 45 nm. Later that year, Intel released a processor with the Nehalem architecture. Nehalem had positive reviews.
Sale of XScale processor business

On June 27, 2006, the sale of Intel's XScale assets was announced. Intel agreed to sell the XScale processor business to Marvell Technology Group for an estimated $600 million and the assumption of unspecified liabilities. The move was intended to permit Intel to focus its resources on its core x86 and server businesses, and the acquisition completed on November 9, 2006.
Acquisitions

On August 19, 2010, Intel announced that it planned to purchase McAfee, a manufacturer of computer security technology. The purchase price was $7.68 billion, and the companies said that if the deal were approved, new products would be released early in 2011. On January 26, 2011, the European Union approved the acquisition, after Intel agreed to provide rival security firms with all necessary information that would allow their products to use Intel's chips and personal computers. After the acquisition, Intel had about 90,000 employees, including about 12,000 software engineers.

On August 30, 2010, Intel and Infineon Technologies announced that Intel would acquire Infineon's Wireless Solutions business. Intel planned to use Infineon's technology in laptops, smart phones, netbooks, tablets and embedded computers in consumer products, eventually integrating its wireless modem into Intel's silicon chips.

In March 2011, Intel bought most of the assets of Cairo-based SySDSoft.

In July 2011, Intel announced that it had agreed to acquire Fulcrum Microsystems Inc., a company specializing in network switches. The company was previously included on the EE Times list of 60 Emerging Startups.

On October 1, 2011, Intel reached a deal to acquire Telmap, an Israeli-based navigation software company. The purchase price was not disclosed, but Israeli media reported values around $300 million to $350 million.

In July 2012, Intel Corporation agreed to buy 10 percent shares of ASML Holding NV for $2.1 billion and another $1 billon for 5 percent shares that need shareholder approval to fund relevant research and development efforts, as part of a EUR3.3 billion ($4.1 billion) deal to accelerate the development of 450-millimeter wafer technology and extreme ultra-violet lithography by as much as two years.

In July 2013, Intel confirmed the acquisition of Omek Interactive, an Israeli company that makes technology for gesture-based interfaces, without disclosing the monetary value of the deal. An official statement from Intel read: "The acquisition of Omek Interactive will help increase Intel's capabilities in the delivery of more immersive perceptual computing experiences." One report estimated the value of the acquisition between US$30 million and $50 million.

The acquisition of a Spanish natural language recognition startup named Indisys was announced on September 13, 2013. The terms of the deal were not disclosed but an email from an Intel representative stated: "Intel has acquired Indisys, a privately held company based in Seville, Spain. The majority of Indisys employees joined Intel. We signed the agreement to acquire the company on May 31 and the deal has been completed." Indysis explains that its artificial intelligence (AI) technology "is a human image, which converses fluently and with common sense in multiple languages and also works in different platforms."

In December 2014, Intel bought PasswordBox.


Expansions

In 2008, Intel spun off key assets of a solar startup business effort to form an independent company, SpectraWatt Inc. However, as of 2011, SpectraWatt has filed for bankruptcy.

In February 2011, Intel announced plans to build a new microprocessor manufacturing facility in Chandler, Arizona, which is expected to be completed in 2013, at a cost of $5 billion. It will accommodate 4,000 employees. The company produces three-quarters of their products in the United States, although three-quarters of their revenue comes from overseas.

In April 2011, Intel began a pilot project with ZTE Corporation to produce smartphones using the Intel Atom processor for China's domestic market. This project is intended to challenge the domination of ARM processors in mobile phones.

In December 2011, Intel announced that it reorganized several of its business units to form a new mobile and communications group.This group will be responsible for the company's smartphone, tablet and wireless efforts, and will be headed by Hermann Eul and Mike Bell.
Opening up the foundries

Finding itself with excess fab capacity after the failure of the Ultrabook to gain market traction and with PC sales declining, in 2013 Intel reached a foundry agreement to produce chips for Altera using 14-nm process. General Manager of Intel's custom foundry division Sunit Rikhi indicated that Intel would pursue further such deals in the future. This was after poor sales of Windows 8 hardware caused a major retrenchment for most of the major semconductor manufacturers, except for Qualcomm, which continued to see healthy purchases from its largest customer, Apple.


As of July 2013, five companies will use Intel's fabs via the Intel Custom Foundry division: Achronix, Tabula, Netronome, Microsemi, and Altera—most are FPGA makers, but Netronome designs network processors. Only Achronix began shipping chips made by Intel using the 22-nm Tri-Gate process. Several other customers also exist but were not announced at the time.

The Alliance for Affordable Internet (A4AI) was launched in October 2013 and Intel is part of the coalition of public and private organisations that also includes Facebook, Google, and Microsoft. Led by Sir Tim Berners-Lee, the A4AI seeks to make Internet access more affordable so that access is broadened in the developing world, where only 31% of people are online. Google will help to decrease internet access prices so that they fall below the UN Broadband Commission's worldwide target of 5% of monthly income.
Product and market history
SRAMS and the microprocessor

Intel's first products were shift register memory and random-access memory integrated circuits, and Intel grew to be a leader in the fiercely competitive DRAM, SRAM, and ROM markets throughout the 1970s. Concurrently, Intel engineers Marcian Hoff, Federico Faggin, Stanley Mazor and Masatoshi Shima invented Intel's first microprocessor. Originally developed for the Japanese company Busicom to replace a number of ASICs in a calculator already produced by Busicom, the Intel 4004 was introduced to the mass market on November 15, 1971, though the microprocessor did not become the core of Intel's business until the mid-1980s. (Note: Intel is usually given credit with Texas Instruments for the almost-simultaneous invention of the microprocessor)
From DRAM to microprocessors

In 1983, at the dawn of the personal computer era, Intel's profits came under increased pressure from Japanese memory-chip manufacturers, and then-president Andy Grove focused the company on microprocessors. Grove described this transition in the book Only the Paranoid Survive. A key element of his plan was the notion, then considered radical, of becoming the single source for successors to the popular 8086 microprocessor.

Until then, the manufacture of complex integrated circuits was not reliable enough for customers to depend on a single supplier,[clarification needed] but Grove began producing processors in three geographically distinct factories,[which?] and ceased licensing the chip designs to competitors such as Zilog and AMD.[citation needed] When the PC industry boomed in the late 1980s and 1990s, Intel was one of the primary beneficiaries.
Intel, x86 processors, and the IBM PC
The die from an Intel 8742, an 8-bit microcontroller that includes a CPU running at 12 MHz, 128 bytes of RAM, 2048 bytes of EPROM, and I/O in the same chip.

Despite the ultimate importance of the microprocessor, the 4004 and its successors the 8008 and the 8080 were never major revenue contributors at Intel. As the next processor, the 8086 (and its variant the 8088) was completed in 1978, Intel embarked on a major marketing and sales campaign for that chip nicknamed "Operation Crush", and intended to win as many customers for the processor as possible. One design win was the newly created IBM PC division, though the importance of this was not fully realized at the time.

IBM introduced its personal computer in 1981, and it was rapidly successful. In 1982, Intel created the 80286 microprocessor, which, two years later, was used in the IBM PC/AT. Compaq, the first IBM PC "clone" manufacturer, produced a desktop system based on the faster 80286 processor in 1985 and in 1986 quickly followed with the first 80386-based system, beating IBM and establishing a competitive market for PC-compatible systems and setting up Intel as a key component supplier.

In 1975, the company had started a project to develop a highly advanced 32-bit microprocessor, finally released in 1981 as the Intel iAPX 432. The project was too ambitious and the processor was never able to meet its performance objectives, and it failed in the marketplace. Intel extended the x86 architecture to 32 bits instead.
386 microprocessor

During this period Andrew Grove dramatically redirected the company, closing much of its DRAM business and directing resources to the microprocessor business. Of perhaps greater importance was his decision to "single-source" the 386 microprocessor. Prior to this, microprocessor manufacturing was in its infancy, and manufacturing problems frequently reduced or stopped production, interrupting supplies to customers. To mitigate this risk, these customers typically insisted that multiple manufacturers produce chips they could use to ensure a consistent supply. The 8080 and 8086-series microprocessors were produced by several companies, notably AMD. Grove made the decision not to license the 386 design to other manufacturers, instead producing it in three geographically distinct factories: Santa Clara, California; Hillsboro, Oregon; and Chandler, a suburb of Phoenix, Arizona. He convinced customers that this would ensure consistent delivery. As the success of Compaq's Deskpro 386 established the 386 as the dominant CPU choice, Intel achieved a position of near-exclusive dominance as its supplier. Profits from this funded rapid development of both higher-performance chip designs and higher-performance manufacturing capabilities, propelling Intel to a position of unquestioned leadership by the early 1990s.
486, Pentium, and Itanium

Intel introduced the 486 microprocessor in 1989, and in 1990 formally established a second design team, designing the processors code-named "P5" and "P6" in parallel and committing to a major new processor every two years, versus the four or more years such designs had previously taken. Engineers Vinod Dham and Rajeev Chandrasekhar (Member of Parliament, India) were key figures on the core team that invented the 486 chip and later, Intel's signature Pentium chip. The P5 was earlier known as "Operation Bicycle," referring to the cycles of the processor. The P5 was introduced in 1993 as the Intel Pentium, substituting a registered trademark name for the former part number (numbers, such as 486, are hard to register as a trademark). The P6 followed in 1995 as the Pentium Pro and improved into the Pentium II in 1997. New architectures were developed alternately in Santa Clara, California and Hillsboro, Oregon.

The Santa Clara design team embarked in 1993 on a successor to the x86 architecture, codenamed "P7". The first attempt was dropped a year later, but quickly revived in a cooperative program with Hewlett-Packard engineers, though Intel soon took over primary design responsibility. The resulting implementation of the IA-64 64-bit architecture was the Itanium, finally introduced in June 2001. The Itanium's performance running legacy x86 code did not meet expectations, and it failed to compete effectively with x86-64, which was AMD's 64-bit extensions to the original x86 architecture (Intel uses the name Intel 64, previously EM64T). As of 2012, Intel continues to develop and deploy the Itanium; known planning continues into 2014.

The Hillsboro team designed the Willamette processors (initially code-named P68), which were marketed as the Pentium 4.[citation needed]
Pentium flaw
Main article: Pentium FDIV bug

In June 1994, Intel engineers discovered a flaw in the floating-point math subsection of the P5 Pentium microprocessor. Under certain data-dependent conditions, the low-order bits of the result of a floating-point division would be incorrect. The error could compound in subsequent calculations. Intel corrected the error in a future chip revision, but nonetheless declined to disclose it.[citation needed]

In October 1994, Dr. Thomas Nicely, Professor of Mathematics at Lynchburg College, independently discovered the bug. He contacted Intel, but received no response. On October 30, he posted a message on the Internet.Word of the bug spread quickly and reached the industry press. The bug was easy to replicate; a user could enter specific numbers into the calculator on the operating system. Consequently, many users did not accept Intel's statements that the error was minor and "not even an erratum." During Thanksgiving, in 1994, The New York Times ran a piece by journalist John Markoff spotlighting the error. Intel changed its position and offered to replace every chip, quickly putting in place a large end-user support organization. This resulted in a $500 million charge against Intel's 1994 revenue.

Ironically, the "Pentium flaw" incident, Intel's response to it, and the surrounding media coverage propelled Intel from being a technology supplier generally unknown to most computer users to a household name. Dovetailing with an uptick in the "Intel Inside" campaign, the episode is considered to have been a positive event for Intel, changing some of its business practices to be more end-user focused and generating substantial public awareness, while avoiding a lasting negative impression.
"Intel Inside" and other 1990s programs

During this period, Intel undertook two major supporting programs. The first is widely known: the 1991 "Intel Inside" marketing and branding campaign. The idea of ingredient branding was new at the time with only Nutrasweet and a few others making attempts to do so. This campaign established Intel, which had been a component supplier little-known outside the PC industry, as a household name.

The second program is little-known: Intel's Systems Group began, in the early 1990s, manufacturing PC "motherboards", the main board component of a personal computer, and the one into which the processor (CPU) and memory (RAM) chips are plugged. Shortly after, Intel began manufacturing fully configured "white box" systems for the dozens of PC clone companies that rapidly sprang up.[citation needed] At its peak in the mid-1990s, Intel manufactured over 15% of all PCs, making it the third-largest supplier at the time.[citation needed]

During the 1990s, Intel's Architecture Lab (IAL) was responsible for many of the hardware innovations of the personal computer, including the PCI Bus, the PCI Express (PCIe) bus, the Universal Serial Bus (USB). IAL's software efforts met with a more mixed fate; its video and graphics software was important in the development of software digital video,citation needed] but later its efforts were largely overshadowed by competition from Microsoft. The competition between Intel and Microsoft was revealed in testimony by IAL Vice-President Steven McGeady at the Microsoft antitrust trial.

Wednesday, December 31, 2014

wordpress history

December 31, 2014 0 Comments


WordPress users may install and switch between themes. Themes allow users to change the look and functionality of a WordPress website or installation without altering the information content or structure of the site. Themes may be installed using the WordPress "Appearance" administration tool or theme folders may be uploaded via FTP. The PHP, HTML (HyperText Markup Language) and CSS (Cascading Style Sheets) code found in themes can be added to or edited for providing advanced features. Thousands of WordPress themes exist, some free, and some paid for templates. WordPress users may also create and develop their own custom themes if they have the knowledge and skill to do so.
Plugins

WordPress's plugin architecture allows users to extend its features. WordPress has over 30,000 plugins available, each of which offers custom functions and features enabling users to tailor their sites to their specific needs. These customizations range from search engine optimization, to client portals used to display private information to logged in users, to content displaying features, such as the addition of widgets and navigation bars.
Mobiles

Native applications exist for WebOS,Android, iOS (iPhone, iPod Touch, iPad) Windows Phone, and BlackBerry. These applications, designed by Automattic, allow a limited set of options, which include adding new blog posts and pages, commenting, moderating comments, replying to comments in addition to the ability to view the stats.
Other features

WordPress also features integrated link management; a search engine–friendly, clean permalink structure; the ability to assign multiple categories to articles; and support for tagging of posts and articles. Automatic filters are also included, providing standardized formatting and styling of text in articles (for example, converting regular quotes to smart quotes). WordPress also supports the Trackback and Pingback standards for displaying links to other sites that have themselves linked to a post or an article.
Multi-user and multi-blogging

Prior to version 3, WordPress supported one blog per installation, although multiple concurrent copies may be run from different directories if configured to use separate database tables. WordPress Multisites (previously referred to as WordPress Multi-User, WordPress MU, or WPMU) was a fork of WordPress created to allow multiple blogs to exist within one installation but is able to be administered by a centralized maintainer. WordPress MU makes it possible for those with websites to host their own blogging communities, as well as control and moderate all the blogs from a single dashboard. WordPress MS adds eight new data tables for each blog...

As of the release of WordPress 3, WordPress MU has merged with WordPress.
History

b2/cafelog, more commonly known as simply b2 or cafelog, was the precursor to WordPress. b2/cafelog was estimated to have been installed on approximately 2,000 blogs as of May 2003. It was written in PHP for use with MySQL by Michel Valdrighi, who is now a contributing developer to WordPress. Although WordPress is the official successor, another project, b2evolution, is also in active development.

WordPress first appeared in 2003 as a joint effort between Matt Mullenweg and Mike Little to create a fork of b2Christine Selleck Tremoulet, a friend of Mullenweg, suggested the name WordPress

In 2004 the licensing terms for the competing Movable Type package were changed by Six Apart and many of its most influential users migrated to WordPress.By October 2009 the 2009 Open Source content management system Market Share Report reached the conclusion that WordPress enjoyed the greatest brand strength of any open-source content-management systems.
Release history

Main releases of WordPress are codenamed after well-known jazz musicians, starting after version 1.0.
Legend:     Old version     Older version, still supported     Current version     Future release
Version     Code name     Release date     Notes
0.7     none     27 May 2003      Used the same file structure as its predecessor, b2/cafelog, and continued the numbering from its last release, 0.6.[30] Only 0.71-gold is available for download in the official WordPress Release Archive page.
1.0     Davis     3 January 2004      Added search engine friendly permalinks, multiple categories, dead simple installation and upgrade, comment moderation, XFN support, Atom support.
1.2     Mingus     22 May 2004     Added support of Plugins; which same identification headers are used unchanged in WordPress releases as of 2011.
1.5     Strayhorn     17 February 2005      Added a range of vital features, such as ability to manage static pages and a template/Theme system. It was also equipped with a new default template (code named Kubrick). designed by Michael Heilemann.
2.0     Duke     31 December 2005      Added rich editing, better administration tools, image uploading, faster posting, improved import system, fully overhauled the back end, and various improvements to Plugin developers.
2.1     Ella     22 January 2007      Corrected security issues, redesigned interface, enhanced editing tools (including integrated spell check and auto save), and improved content management options.
2.2     Getz     16 May 2007      Added widget support for templates, updated Atom feed support, and speed optimizations.
2.3     Dexter     24 September 2007      Added native tagging support, new taxonomy system for categories, and easy notification of updates, fully supports Atom 1.0, with the publishing protocol, and some much needed security fixes.
2.5     Brecker     29 March 2008      Version 2.4 was skipped, so version 2.5 added two releases worth of new code. The administration interface was fully redesigned, and the WordPress website to match the new style.
2.6     Tyner     15 July 2008      Added new features that made WordPress a more powerful CMS: it can now track changes to every post and page and allow easy posting from anywhere on the web.
2.7     Coltrane     11 December 2008      Administration interface redesigned fully, added automatic upgrades and installing Plugins, from within the administration interface.
2.8     Baker     10 June 2009      Added improvements in speed, automatic installing of Themes from within administration interface, introduces the CodePress editor for syntax highlighting and a redesigned widget interface.
2.9     Carmen     19 December 2009      Added global undo, built-in image editor, batch Plugin updating, and many less visible tweaks.
3.0     Thelonious     17 June 2010     Added a new Theme application programming interfaces (API); the merge of WordPress and WordPress MU, creating the new multi-site functionality, a new default Theme called "Twenty Ten" and a refreshed, lighter admin UI.
3.1     Reinhardt     23 February 2011     Added the Admin Bar, which is displayed on all blog pages when an admin is logged in, and Post Format, best explained as a Tumblr like micro-blogging feature. It provides easy access to many critical functions, such as comments and updates. Includes internal linking abilities, a newly streamlined writing interface, and many other changes.
3.2     Gershwin     4 July 2011      Focused on making WordPress faster and lighter. Released only four months after version 3.1, reflecting the growing speed of development in the WordPress community.
3.3     Sonny     12 December 2011      Focused on making WordPress friendlier for beginners and tablet computer users.
3.4     Green     13 June 2012     Focused on improvements to Theme customization, Twitter integration and several minor changes.
3.5     Elvin     11 December 2012      Support for the Retina Display, color picker, new Theme: Twenty Twelve, improved image workflow
3.6     Oscar     1 August 2013      New Theme: Twenty Thirteen ; Admin Enhancements - Post Formats UI Update, Menus UI improvements, Revisions Update, Autosave and Post Locking
3.7     Basie     24 October 2013      Automatically apply maintenance and security updates in the background; Stronger password recommendations; Support for automatically installing the right language files and keeping them up to date
3.8     Parker     12 December 2013      Improved admin interface; Responsive design for mobile devices; New typography using Open Sans; Admin color schemes; Redesigned Theme management interface; Simplified main dashboard; Twenty Fourteen magazine style default Theme; Second release using "Plugin-first development process"
3.9     Smith     16 April 2014      "New features like live widget previews and the new Theme installer are now more ready for prime time, so check 'em out.

UI refinements when editing images and when working with media in the editor. We've also brought back some of the advanced display settings for images."
4.0     Benny     4 September 2014     Improved media management, embeds, writing interface, and plugin discovery.
4.1     Dinah     18 December 2014      "We’ve made a lot of refinements over the last few weeks. RC means we think we’re done, but with millions of users anthousands of plugins and themes, it’s possible we’ve missed something. We hope to ship WordPress 4.1 on Tuesday, December 16, but we need your help to get there. If you haven’t tested 4.1 yet, now is the time! (Please though, not on your live site unless you’re adventurous."
Future

Matt Mullenweg has stated that the future of WordPress is in social, mobile, and as an application platform.
Vulnerabilitie
Many security issues have been uncovered in the software, particularly in 2007 and 2008. According to Secunia, WordPress in April 2009 had 7 unpatched security advisories (out of 32 total), with a maximum rating of "Less Critical." Secunia maintains an up-to-date list of WordPress vulnerabilities.

In January 2007, many high profile search engine optimization (SEO) blogs, as well as many low-profile commercial blogs featuring AdSense, were targeted and attacked with a WordPress exploit. A separate vulnerability on one of the project site's web servers allowed an attacker to introduce exploitable code in the form of a back door to some downloads of WordPress 2.1.1. The 2.1.2 release addressed this issue; an advisory released at the time advised all users to upgrade immediately.

In May 2007, a study revealed that 98% of WordPress blogs being run were exploitable because they were running outdated and unsupported versions of the software.[65] In part to mitigate this problem, WordPress made updating the software a much easier, "one click" automated process in version 2.7 (released in December 2008).[66] However, the filesystem security settings required to enable the update process can be an additional risk.[67]

In a June 2007 interview, Stefan Esser, the founder of the PHP Security Response Team, spoke critically of WordPress's security track record, citing problems with the application's architecture that made it unnecessarily difficult to write code that is secure from SQL injection vulnerabilities, as well as some other problems.[68]

In June 2013, it was found that some of the 50 most downloaded WordPress plugins were vulnerable to common Web attacks such as SQL injection and XSS. A separate inspection of the top-10 e-commerce plugins showed that 7 of them were vulnerable.[69]

In an effort to promote better security, and to streamline the update experience overall, automatic background updates were introduced in WordPress 3.7.

Individual installations of WordPress can be protected with security plugins. Users can also protect their WordPress installations by taking steps such as keeping all WordPress installation, themes, and plugins updated, using only trusted themes and plugins,editing the site's .htaccess file to prevent many types of SQL injection attacks and block unauthorized access to sensitive files.

Developers can also use tools to analyze potential vulnerabilities, including Wordpress Auditor or Wordpress Sploit Framework developed by 0pc0deFR. These types of tools research known vulnerabilities, such as a XSS or SQL injection. Some vulnerabilities can not be detected by the tools, so it is advisable to check the code from other developers.
Critiques

Independent analyst firm Real Story Group evaluates WordPress as a Web content management system CMS. In a 2014 analysis, the firm argued that growing enterprise demand for WordPress was part of a broader push for "embracing greater simplicity" in web publishing.
Development and support
Key developers

Matt Mullenweg and Mike Little were cofounders of the project. The core contributing developers include Ryan Boren, Mark Jaquith, Matt Mullenweg, Andrew Ozz, Peter Westwood and Andrew Nacin.

WordPress is also developed by its community, including WP testers, a group of volunteers who test each release. They have early access to nightly builds, beta versions and release candidates. Errors are documented in a special mailing list, or the project's Trac tool.

Though largely developed by the community surrounding it, WordPress is closely associated with Automattic, the company founded by Matt Mullenweg. On September 9, 2010, Automattic handed the WordPress trademark to the newly created WordPress Foundation, which is an umbrella organization supporting WordPress.org (including the software and archives for plugins and themes), bbPress and BuddyPress.
WordCamp developer and user conferences
A WordCamp in Sofia, Bulgaria (2011)

"WordCamp" is the name given to all WordPress-related gatherings, both informal unconferences and more formal conferences.[78] The first such event was WordCamp 2006 in August 2006 in San Francisco, which lasted one day and had over 500 attendees.[79][80] The first WordCamp outside San Francisco was held in Beijing in September 2007.[81] Since then, there have been over 350 WordCamps in over 150 cities in 48 different countries around the world.WordCamp San Francisco, an annual event, remains the official annual conference of WordPress developers and users.
Support

WordPress's primary support website is WordPress.org. This support website hosts both WordPress Codex, the online manual for WordPress and a living repository for WordPress information and documentation, and WordPress Forums, an active online community of WordPress users.

Tuesday, December 30, 2014

albert einstein history

December 30, 2014 0 Comments
"Einstein" redirects here. For other uses, see Albert Einstein (disambiguation) and Einstein (disambiguation).
This is a good article. Click here for more information.
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Albert Einstein
Einstein 1921 by F Schmutzer - restoration.jpg
Albert Einstein in 1921
Born     14 March 1879
Ulm, Kingdom of Württemberg, German Empire
Died     18 April 1955 (aged 76)
Princeton, New Jersey, United States
Residence     Germany, Italy, Switzerland, Austria, Belgium, United States
Citizenship    

    Kingdom of Württemberg (1879–1896)
    Stateless (1896–1901)
    Switzerland (1901–1955)
    Austrian of the Austro-Hungarian Empire (1911–1912)
    German Empire (1914–1918)
    Weimar Republic (1919–1933)
    United States (1940–1955)

Fields     Physics, Philosophy
Institutions    

    Swiss Patent Office (Bern)
    University of Zurich
    Charles University in Prague
    ETH Zurich
    Caltech
    Prussian Academy of Sciences
    Kaiser Wilhelm Institute
    University of Leiden
    Institute for Advanced Study

Alma mater    

    ETH Zurich
    University of Zurich

Thesis     Folgerungen aus den Capillaritätserscheinungen (1901)
Doctoral advisor     Alfred Kleiner
Other academic advisors     Heinrich Friedrich Weber
Notable students    

    Abdul Jabbar Abdullah
    Ernst G. Straus
    Nathan Rosen
    Leó Szilárd
    Raziuddin Siddiqui

Known for    

    General relativity and special relativity
    Photoelectric effect
    Mass-energy equivalence
    Theory of Brownian Motion
    Einstein field equations
    Bose–Einstein statistics
    Bose–Einstein condensate
    Bose–Einstein correlations
    Unified Field Theory
    EPR paradox

Notable awards    

    Barnard Medal (1920)
    Nobel Prize in Physics (1921)
    Matteucci Medal (1921)
    Copley Medal (1925)[2]
    Max Planck Medal (1929)
    Time Person of the Century (1999)

Spouse     Mileva Marić (1903–1919)
Elsa Löwenthal (1919–1936)
Children     "Lieserl" (1902–1903?)
Hans Albert (1904–1973)
Eduard "Tete" (1910–1965)
Signature

Albert Einstein (/ˈælbərt ˈaɪnstaɪn/; German: [ˈalbɐrt ˈaɪnʃtaɪn] ( listen); 14 March 1879 – 18 April 1955) was a German-born theoretical physicist and philosopher of science.He developed the general theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics). He is best known in popular culture for his mass–energy equivalence formula E = mc2 (which has been dubbed "the world's most famous equation"). He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect". The latter was pivotal in establishing quantum theory.

Near the beginning of his career, Einstein thought that Newtonian mechanics was no longer enough to reconcile the laws of classical mechanics with the laws of the electromagnetic field. This led to the development of his special theory of relativity. He realized, however, that the principle of relativity could also be extended to gravitational fields, and with his subsequent theory of gravitation in 1916, he published a paper on the general theory of relativity. He continued to deal with problems of statistical mechanics and quantum theory, which led to his explanations of particle theory and the motion of molecules. He also investigated the thermal properties of light which laid the foundation of the photon theory of light. In 1917, Einstein applied the general theory of relativity to model the large-scale structure of the universe.

He was visiting the United States when Adolf Hitler came to power in 1933 and, being Jewish, did not go back to Germany, where he had been a professor at the Berlin Academy of Sciences. He settled in the U.S., becoming an American citizen in 1940.the eve of World War II, he endorsed a letter to President Franklin D. Roosevelt alerting him to the potential development of "extremely powerful bombs of a new type" and recommending that the U.S. begin similar research. This eventually led to what would become the Manhattan Project. Einstein supported defending the Allied forces, but largely denounced the idea of using the newly discovered nuclear fission as a weapon. Later, with the British philosopher Bertrand Russell, Einstein signed the Russell–Einstein Manifesto, which highlighted the danger of nuclear weapons. Einstein was affiliated with the Institute for Advanced Study in Princeton, New Jersey, until his death in 1955.

Einstein published more than 300 scientific papers along with over 150 non-scientific works.On 5 December 2014, universities and archives announced the release of Einstein's papers, comprising more than 30,000 unique documents. Einstein's intellectual achievements and originality have made the word "Einstein" synonymous with genius so that in a sense he may be regarded as the greatest genius who ever lived.

SORRY ERROr........................

seo Search engine optimization history

December 30, 2014 0 Comments
"SEO" redirects here. For other uses, see SEO (disambiguation).
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Part of a series on
Internet marketing

    Search engine optimization Social media marketing Email marketing Referral marketing Content marketing Native advertising
Search engine marketing

    Pay per click
    Cost per impression
    Search analytics
    Web analytics

Display advertising

    Contextual advertising
    Behavioral targeting

Affiliate marketing

    Cost per action
    Revenue sharing

Mobile advertisin
Search engine optimization (SEO) is the process of affecting the visibility of a website or a web page in a search engine's "natural" or un-paid ("organic") search results. In general, the earlier (or higher ranked on the search results page), and more frequently a site appears in the search results list, the more visitors it will receive from the search engine's users. SEO may target different kinds of search, including image search, local search, video search, academic search, news search and industry-specific vertical search engines.

As an Internet marketing strategy, SEO considers how search engines work, what people search for, the actual search terms or keywords typed into search engines and which search engines are preferred by their targeted audience. Optimizing a website may involve editing its content, HTML and associated coding to both increase its relevance to specific keywords and to remove barriers to the indexing activities of search engines. Promoting a site to increase the number of backlinks, or inbound links, is another SEO tactic.

The plural of the abbreviation SEO can also refer to "search engine optimizers", those who provide SEO services.

History

Webmasters and content providers began optimizing sites for search engines in the mid-1990s, as the first search engines were cataloging the early Web. Initially, all webmasters needed to do was to submit the address of a page, or URL, to the various engines which would send a "spider" to "crawl" that page, extract links to other pages from it, and return information found on the page to be indexed. The process involves a search engine spider downloading a page and storing it on the search engine's own server, where a second program, known as an indexer, extracts various information about the page, such as the words it contains and where these are located, as well as any weight for specific words, and all links the page contains, which are then placed into a scheduler for crawling at a later date.

Site owners started to recognize the value of having their sites highly ranked and visible in search engine results, creating an opportunity for both white hat and black hat SEO practitioners. According to industry analyst Danny Sullivan, the phrase "search engine optimization" probably came into use in 1997.On May 2, 2007, Jason Gambert attempted to trademark the term SEO by convincing the Trademark Office in Arizonathat SEO is a "process" involving manipulation of keywords, and not a "marketing service." The reviewing attorney basically bought his incoherent argument that while "SEO" can't be trademarked when it refers to a generic process of manipulated keywords, it can be a service mark for providing "marketing services...in the field of computers."

Early versions of search algorithms relied on webmaster-provided information such as the keyword meta tag, or index files in engines like ALIWEB. Meta tags provide a guide to each page's content. Using meta data to index pages was found to be less than reliable, however, because the webmaster's choice of keywords in the meta tag could potentially be an inaccurate representation of the site's actual content. Inaccurate, incomplete, and inconsistent data in meta tags could and did cause pages to rank for irrelevant searches.[dubious – discuss] Web content providers also manipulated a number of attributes within the HTML source of a page in an attempt to rank well in search engines.

By relying so much on factors such as keyword density which were exclusively within a webmaster's control, early search engines suffered from abuse and ranking manipulation. To provide better results to their users, search engines had to adapt to ensure their results pages showed the most relevant search results, rather than unrelated pages stuffed with numerous keywords by unscrupulous webmasters. Since the success and popularity of a search engine is determined by its ability to produce the most relevant results to any given search, poor quality or irrelevant search results could lead users to find other search sources. Search engines responded by developing more complex ranking algorithms, taking into account additional factors that were more difficult for webmasters to manipulate. Graduate students at Stanford University, Larry Page and Sergey Brin, developed "Backrub," a search engine that relied on a mathematical algorithm to rate the prominence of web pages. The number calculated by the algorithm, PageRank, is a function of the quantity and strength of inbound links. PageRank estimates the likelihood that a given page will be reached by a web user who randomly surfs the web, and follows links from one page to another. In effect, this means that some links are stronger than others, as a higher PageRank page is more likely to be reached by the random surfer.

Page and Brin founded Google in 1998. Google attracted a loyal following among the growing number of Internet users, who liked its simple design. Off-page factors (such as PageRank and hyperlink analysis) were considered as well as on-page factors (such as keyword frequency, meta tags, headings, links and site structure) to enable Google to avoid the kind of manipulation seen in search engines that only considered on-page factors for their rankings. Although PageRank was more difficult to game, webmasters had already developed link building tools and schemes to influence the Inktomi search engine, and these methods proved similarly applicable to gaming PageRank. Many sites focused on exchanging, buying, and selling links, often on a massive scale. Some of these schemes, or link farms, involved the creation of thousands of sites for the sole purpose of link spamming.

By 2004, search engines had incorporated a wide range of undisclosed factors in their ranking algorithms to reduce the impact of link manipulation. In June 2007, The New York Times' Saul Hansell stated Google ranks sites using more than 200 different signals.The leading search engines, Google, Bing, and Yahoo, do not disclose the algorithms they use to rank pages. Some SEO practitioners have studied different approaches to search engine optimization, and have shared their personal opinions Patents related to search engines can provide information to better understand search engines.

In 2005, Google began personalizing search results for each user. Depending on their history of previous searches, Google crafted results for logged in users. In 2008, Bruce Clay said that "ranking is dead" because of personalized search. He opined that it would become meaningless to discuss how a website ranked, because its rank would potentially be different for each user and each search.
In 2007, Google announced a campaign against paid links that transfer PageRank. On June 15, 2009, Google disclosed that they had taken measures to mitigate the effects of PageRank sculpting by use of the nofollow attribute on links. Matt Cutts, a well-known software engineer at Google, announced that Google Bot would no longer treat nofollowed links in the same way, in order to prevent SEO service providers from using nofollow for PageRank sculpting.As a result of this change the usage of nofollow leads to evaporation of pagerank. In order to avoid the above, SEO engineers developed alternative techniques that replace nofollowed tags with obfuscated Javascript and thus permit PageRank sculpting. Additionally several solutions have been suggested that include the usage of iframes, Flash and Javascript.

In December 2009, Google announced it would be using the web search history of all its users in order to populate search results.


On June 8, 2010 a new web indexing system called Google Caffeine was announced. Designed to allow users to find news results, forum posts and other content much sooner after publishing than before, Google caffeine was a change to the way Google updated its index in order to make things show up quicker on Google than before. According to Carrie Grimes, the software engineer who announced Caffeine for Google, "Caffeine provides 50 percent fresher results for web searches than our last index..."
Google Instant, real-time-search, was introduced in late 2010 in an attempt to make search results more timely and relevant. Historically site administrators have spent months or even years optimizing a website to increase search rankings. With the growth in popularity of social media sites and blogs the leading engines made changes to their algorithms to allow fresh content to rank quickly within the search results.
In February 2011, Google announced the Panda update, which penalizes websites containing content duplicated from other websites and sources. Historically websites have copied content from one another and benefited in search engine rankings by engaging in this practice, however Google implemented a new system which punishes sites whose content is not unique.

In April 2012, Google launched the Google Penguin update the goal of which was to penalize websites that used manipulative techniques to improve their rankings on the search engine.
In September 2013, Google released the Google Hummingbird update, an algorithm change designed to improve Google's natural language processing and semantic understanding of web pages.
Relationship with search engines

By 1997, search engine designers recognized that webmasters were making efforts to rank well in their search engines, and that some webmasters were even manipulating their rankings in search results by stuffing pages with excessive or irrelevant keywords. Early search engines, such as Altavista and Infoseek, adjusted their algorithms in an effort to prevent webmasters from manipulating rankings.

In 2005, an annual conference, AIRWeb, Adversarial Information Retrieval on the Web was created to bring together practitioners and researchers concerned with search engine optimisation and related topics.
Companies that employ overly aggressive techniques can get their client websites banned from the search results. In 2005, the Wall Street Journal reported on a company, Traffic Power, which allegedly used high-risk techniques and failed to disclose those risks to its clients. Wired magazine reported that the same company sued blogger and SEO Aaron Wall for writing about the ban.Google's Matt Cutts later confirmed that Google did in fact ban Traffic Power and some of its clients.

Some search engines have also reached out to the SEO industry, and are frequent sponsors and guests at SEO conferences, chats, and seminars. Major search engines provide information and guidelines to help with site optimization.Google has a Sitemaps program to help webmasters learn if Google is having any problems indexing their website and also provides data on Google traffic to the website. Bing Webmaster Tools provides a way for webmasters to submit a sitemap and web feeds, allows users to determine the crawl rate, and track the web pages index status.

Sunday, December 28, 2014

History of science and technology

December 28, 2014 0 Comments

For historical accounts of the development of science and technology, see history of science and history of technology.
History of science
Frontispiece of the "Rudolphine Tables" published by Johannes Kepler in 1627
Background[hide]

    Theories and sociology
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    Early cultures
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Mathematics[hide]

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    List-Class article Timelines
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The history of Science and Technology (HST) is a field of history which examines how humanity's understanding of the natural world (science) and ability to manipulate it (Technology) have changed over the centuries. This academic discipline also studies the cultural, economic, and political impacts of scientific innovation.

Histories of science were originally written by practicing and retired scientists, starting primarily with William Whewell, as a way to communicate the virtues of science to the public. In the early 1930s, after a famous paper given by the Soviet historian Boris Hessen, was focused into looking at the ways in which scientific practices were allied with the needs and motivations of their context. After World War II, extensive resources were put into teaching and researching the discipline, with the hopes that it would help the public better understand both Science and Technology as they came to play an exceedingly prominent role in the world. In the 1960s, especially in the wake of the work done by Thomas Kuhn, the discipline began to serve a very different function, and began to be used as a way to critically examine the scientific enterprise. At the present time it is often closely aligned with the field of Science studies.[citation needed]

Modern engineering as it is understood today took form during the scientific revolution, though much of the mathematics and science was built on the work of the Greeks, Egyptians, Mesopotamians, Chinese, Indians and Muslims.[citation needed] See the main articles History of science and History of technology for these respective topics.

Contents

    1 Universities with HST programs
        1.1 Argentina
        1.2 Australia
        1.3 Belgium
        1.4 Canada
        1.5 France
        1.6 Germany
        1.7 Greece
        1.8 India
        1.9 Israel
        1.10 Japan
        1.11 Netherlands
        1.12 Spain
        1.13 Sweden
        1.14 Switzerland
        1.15 United Kingdom
        1.16 United States
    2 Prominent historians of the field
    3 Journals and periodicals
    4 See also
    5 Professional societies
    6 References
    7 Bibliography
    8 External links

Universities with HST programs
Argentina

    Buenos Aires Institute of Technology, Argentina, has been offering courses on History of the Technology and the Science.
    National Technological University, Argentina, has a complete history program on its offered careers.

Australia

    The University of Sydney offers both undergraduate and postgraduate programmes in the History and Philosophy of Science, run by the Unit for the History and Philosophy of Science, within the Science Faculty. Undergraduate coursework can be completed as part of either a Bachelor of Science or a Bachelor of Arts Degree. Undergraduate study can be furthered by completing an additional Honours year. For postgraduate study, the Unit offers both coursework and research based degrees. The two course-work based postgraduate degrees are the Graduate Certificate in Science (HPS) and the Graduate Diploma in Science (HPS). The two research based postgraduate degrees are a Master of Science (MSc) and Doctor of Philosophy (PhD).
Belgium

    University of Liège, has a Department called Centre d'histoire des Sciences et Techniques.

Canada

    Carleton University Ottawa offer courses in Ancient Science and Technology in its Technology, Society and Environment program
    University of Toronto has a program in History and Philosophy of Science and Technology.
    University of King's College in Halifax, Nova Scotia has a History of Science and Technology Program

France

    Nantes University has a dedicated Department called Centre François Viète.
    Paris Diderot University (Paris 7) has a Department of History and Philosophy of Science.
    A CNRS research center in History and Philosophy of Science SPHERE, affiliated with Paris Diderot University, has a dedicated history of technology section.
    Pantheon-Sorbonne University (Paris 1) has a dedicated Institute of History and Philosophy of Science and Technics.
    The École Normale Supérieure de Paris has a history of science Department.

Germany

    Technische Universität Berlin, has a program in the History of Science and Technology.

Greece

    The University of Athens has a Department of Philosophy and History of Science.


Japan

    Kyoto University has a program in the Philosophy and History of Science.
    Tokyo Institute of Technology has a program in the History, Philosophy, and Social Studies of Science and Technology.    The University of Tokyo has a program in the History and Philosophy of Science.

Netherlands

    Utrecht University, has two co-operating programs: one in History and Philosophy of Science at the Faculty of Natural Sciences and one in Historical and Comparative Studies of the Sciences and the Humanities at the Faculty of Humanities.

Spain

    University of the Basque Country, offers a master degree and PhD programme in History and Philosophy of Science and runs since 1952 THEORIA. International Journal for Theory, History and Foundations of Science. The university also sponsors the Basque Museum of the History of Medicine and Science, the only open museum of History of Science of Spain, that in the past offered also PhD courses.
    Universitat Autònoma de Barcelona, offers a master degree and PhD programme in HST together with the Universitat de Barcelona.    Universitat de València, offers a master degree and PhD programme in HST together with the Consejo Superior de Investigaciones Científicas.
Sweden

    Linköpings universitet, has a Science, Technology, and Society program which includes HST.

Switzerland

    University of Bern, has an undergraduate and a graduate program in the History and Philosophy of Science.

United Kingdom

    University College London's Department of Science and Technology Studies offers undergraduate programme in History and Philosophy of Science, including two BSc single honour degrees (UCAS V550 and UCAS L391), plus both major and minor streams in history, philosophy and social studies of science in UCL's Natural Sciences programme. The department also offers MSc degrees in History and Philosophy of Science and in the study of contemporary Science, Technology, and Society. An MPhil/PhD research degree is offered, too. UCL also contains a Centre for the History of Medicine.This operates a small teaching programme in History of Medicine.
    University of Oxford has a one-year graduate course in 'History of Science: Instruments, Museums, Science, Technology' associated with the Museum of the History of Science.    University of Leeds has both undergraduate and graduate programmes in History and Philosophy of Science in the Department of Philosophy.    University of Manchester offers undergraduate modules and postgraduate study in History of Science, Technology and Medicine and is sponsored by the Wellcome Trust.    University of Bristol has a masters and PhD program in the Philosophy and History of Science.    University of Cambridge has an undergraduate course and a large masters and PhD program in the History and Philosophy of Science (including the History of Medicine).    University of Durham has several undergraduate History of Science modules in the Philosophy department, as well as Masters and PhD programs in the discipline.    London Centre for the History of Science, Medicine, and Technology - this Centre closes in 2013. It was formed in 1987 and ran a taught MSc programme, jointly taught by University College London's Department of Science and Technology Studies and Imperial College London. The Masters programme transferred to UCL.

United States

Academic study of the History of Science as an independent discipline was launched by George Sarton at Harvard with his book Introduction to the History of Science (1927) and the Isis journal (founded in 1912). Sarton exemplified the early 20th century view of the history of science as the history of great men and great ideas. He shared with many of his contemporaries a Whiggish belief in history as a record of the advances and delays in the march of progress. The History of Science was not a recognized subfield of American history in this period, and most of the work was carried out by interested Scientists and Physicians rather than professional Historians.[27] With the work of I. Bernard Cohen at Harvard, the history of Science became an established subdiscipline of history after 1945.[28]

    Arizona State University's Center for Biology and Society offers several paths for MS or PhD students who are interested in issues surrounding the history and philosophy of the science, particularly biological sciences. The strength of the Center has much to do with the success of its director Jane Maienschein. With a concentration in Biology and Society one can focus on History and Philosophy of Science, Bioscience Ethics, Policy and Law, or Ecology, Economics, and Ethics of the Environment.[29]
    Brown University has a program in Science and Technology Studies[30] and the History of Mathematics. (This program is in the process of being phased out. There are no longer any full-time faculty, and no new students are being admitted to the program.)
    California Institute of Technology offers courses in the History and Philosophy of Science to fulfill its core humanities requirements.
    Case Western Reserve University has an undergraduate interdisciplinary program in the History and Philosophy of Science[32] and a graduate program in the History of Science, Technology, Environment, and Medicine (STEM).[33]
    Cornell University offers a variety of courses within the Science and Technology course. One notable course is called Science and Technology History, taught currently by Professor Peter Dear, which centers upon the development of Science and Technology History from the Newtonian era up to the Einsteinian revolution. This class is one of the longest running classes at Cornell University and is offered by the College of Arts and Sciences and caters to students who want to learn more about the development of modern science.[34]
    Georgia Institute of Technology has an undergraduate and graduate program in the History of Technology and Society.[35]
    Harvard has a large undergraduate and graduate program in History of Science, and is one of the largest departments currently in the world.[36]
    Indiana University offers undergraduate courses and a masters and PhD program in the History and Philosophy of Science.[9]
    Johns Hopkins University has an undergraduate and graduate program in the History of Science, Medicine, and Technology.[37]
    University of Kings College has a degree program in History of Science and Technology
    Lehigh University offers an undergraduate level STS concentration (founded in 1972) and a graduate program with emphasis on the History of Industrial America.[38]
    Massachusetts Institute of Technology has a Science, Technology, and Society program which includes HST.[39]
    Michigan State University offers an undergraduate major and minor in History, Philosophy, and Sociology of Science through its Lyman Briggs College.
    Princeton University has a program in the History of Science.
    Rensselaer Polytechnic Institute has a Science and Technology Studies department
    Rutgers has a graduate Program in History of Science, Technology, Environment, and Health.
    Stanford has a History and Philosophy of Science and Technology program.
    Stevens Institute of Technology has an undergraduate and graduate program in the History of Science.
    University of California, Berkeley offers a graduate degree in HST through its History program, and maintains a separate sub-department for the field.    University of California, Los Angeles has a relatively large group History of Science and Medicine faculty and graduate students within its History department, and also offers an undergraduate minor in the History of Science.    University of California Santa Barbara has an interdisciplinary graduate program emphasis in Technology & Society through the Center for Information Technology & Society. The history department is affiliated with the emphasis.    University of Florida has a Graduate Program in 'History of Science, Technology, and Medicine' at the University of Florida provides undergraduate and graduate degrees.    University of Minnesota has a Ph.D. program in History of Science, Technology, and Medicine as well as undergraduate courses in these fields. The Minnesota model "integrates" historians of science, technology, and medicine within the various science departments they study, each holding a joint appointment.    University of Oklahoma has an undergraduate minor and a graduate degree program in History of Science.
    University of Pennsylvania has a program in History and Sociology of Science.
    University of Pittsburgh's Department of History and Philosophy of Science offers graduate and undergraduate courses.    University of Puget Sound has a Science, Technology, and Society program, which includes the history of Science and Technology.    University of Wisconsin–Madison has one of the largest programs in History of Science, Medicine and Technology, with particular strength in Medical History, History of Biology, History of Science and Religion, and Environmental History. This program was the first to exist as an independent academic department. It offers M.A. and Ph.D. degrees as well as an undergraduate major.    Wesleyan University has a Science in Society program.
    Yale University has a program in the History of Science and Medicine.

    New Jersey Institute of Technology has a Science, Technology, and Society program which includes the History of Science and Technology    Oregon State University offers a Masters and Ph.D. in History of Science through its Department of History.

Friday, December 26, 2014

history of K2

December 26, 2014 0 Comments
This article is about the mountain in Gilgit-Baltistan, Pakistan. For the mountain in Alberta, see Mount K2. For other uses, see K2 (disambiguation).
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K2
K2 2006b.jpg
K2, summer 2006
Elevation     8,611 m (28,251 ft)
Ranked 2nd
Prominence     4,017 m (13,179 ft)
Ranked 22nd
Listing     Eight-thousander
Country high point
Seven Second Summits
Ultra
Location
K2 is located in Tibetan Plateau
K2
K2
Baltistan, Gilgit–Baltistan, Pakistan
Tashkurgan, Xinjiang, China
Range     Karakoram
Coordinates     35°52′57″N 76°30′48″ECoordinates: 35°52′57″N 76°30′48″E[1]
Climbing
First ascent     31 July 1954
Achille Compagnoni
Lino Lacedelli
Easiest route     Abruzzi Spur

K2, also known as Chhogori/Qogir, Ketu/Kechu, and Mount Godwin-Austen (Urdu:شاہ گوری), is the second highest mountain in the world at 8,611 metres (28,251 ft), after Mount Everest. It is located on the border[2] between Baltistan, in the Gilgit–Baltistan region of northern Pakistan, and the Taxkorgan Tajik Autonomous County of Xinjiang, China.[3] With a peak elevation of 8,611 m (28,251 feet), K2 is the highest point of the Karakoram Range and the highest point in Pakistan.

K2 is known as the Savage Mountain due to the extreme difficulty of ascent and the second-highest fatality rate among the eight thousanders. One in every four people who have attempted the summit have died trying.[4] It is more difficult and hazardous to reach the peak of K2 from the Chinese side; thus, it is usually climbed from the Pakistani side. Unlike Annapurna, the mountain with the highest fatality-to-summit rate (246 summits, 55 deaths),K2 has never been climbed during wintertime.



Name
Montgomerie's original sketch in which he applied the notation K2

The name K2 is derived from the notation used by the Great Trigonometric Survey. Thomas Montgomerie made the first survey of the Karakoram from Mount Haramukh, some 210 km (130 miles) to the south, and sketched the two most prominent peaks, labeling them K1 and K2.

The policy of the Great Trigonometric Survey was to use local names for mountains wherever possibl and K1 was found to be known locally as Masherbrum. K2, however, appeared not to have acquired a local name, possibly due to its remoteness. The mountain is not visible from Askole, the last village to the south, or from the nearest habitation to the north, and is only fleetingly glimpsed from the end of the Baltoro Glacier, beyond which few local people would have ventured.[8] The name Chogori, derived from two Balti words, chhogo ("big") and ri ("mountain") (شاہگوری) has been suggested as a local name,[9] but evidence for its widespread use is scant. It may have been a compound name invented by Western explorers[10] or simply a bemused reply to the question "What's that called?" It does, however, form the basis for the name Qogir (simplified Chinese: 乔戈里峰; traditional Chinese: 喬戈里峰; pinyin: Qiáogēlǐ Fēng) by which Chinese authorities officially refer to the peak. Other local names have been suggested including Lamba Pahar ("Tall Mountain" in Urdu) and Dapsang, but are not widely used.

Lacking a local name, the name Mount Godwin-Austen was suggested, in honor of Henry Godwin-Austen, an early explorer of the area, and while the name was rejected by the Royal Geographical Society it was used on several maps, and continues to be used occasionally
The surveyor's mark, K2, therefore continues to be the name by which the mountain is commonly known. It is now also used in the Balti language, rendered as Kechu or Ketu (Urdu: کے ٹو‎). The Italian climber Fosco Maraini argued in his account of the ascent of Gasherbrum IV that while the name of K2 owes its origin to chance, its clipped, impersonal nature is highly appropriate for so remote and challenging a mountain. He concluded that it was ...
    ... just the bare bones of a name, all rock and ice and storm and abyss. It makes no attempt to sound human. It is atoms and stars. It has the nakedness of the world before the first man – or of the cindered planet after the last.

Geographical setting
File:K2-Animation 280611 DLR-Logo 320x240.ogvPlay media
Virtual flight around K2

K2 lies in the northwestern Karakoram Range. It is located in the Baltistan region of Gilgit–Baltistan, Pakistan and the Taxkorgan Tajik Autonomous County of Xinjiang, China.[a] The Tarim sedimentary basin borders the range on the north and the Lesser Himalayas on the south. Melt waters from vast glaciers, such as those south and east of K2, feed agriculture in the valleys and contribute significantly to the regional fresh-water supply.

K2 is merely ranked 22nd by topographic prominence, a measure of a mountain's independent stature, because it is part of the same extended area of uplift (including the Karakoram, the Tibetan Plateau, and the Himalaya) as Mount Everest, in that it is possible to follow a path from K2 to Everest that goes no lower than 4,594 metres (15,072 ft), at Mustang Lo. Many other peaks, that are far lower than K2, are more independent in this sense.

K2 is notable for its local relief as well as its total height. It stands over 3,000 metres (9,840 ft) above much of the glacial valley bottoms at its base. It is a consistently steep pyramid, dropping quickly in almost all directions. The north side is the steepest: there it rises over 3,200 metres (10,500 ft) above the K2 (Qogir) Glacier in only 3,000 metres (9,800 ft) of horizontal distance. In most directions, it achieves over 2,800 metres (9,200 ft) of vertical relief in less than 4,000 metres (13,000 ft).
A 1986 expedition led by George Wallenstein made an inaccurate measurement incorrectly showing that K2 was taller than Mount Everest, and therefore the tallest mountain in the world. A corrected measurement was made in 1987, but by that point the meme that K2 was the tallest mountain in the world had already made it into many news reports and reference works.

Geology

The mountains of K2 and Broad Peak and the area westward to the lower reaches of Sarpo Laggo glacier consist of metamorphic rocks, which are known as the K2 Gneiss and part of the Karakroam Metamorphic Complex.[17][18] The K2 Gneiss consists of a mixture of orthogneiss and biotite-rich paragneiss. On the south and southeast face of K2, the orthogneiss consists of a mixture of a strongly foliated plagioclase-hornblende gneiss and a biotite-hornblende-K-feldspar orthogneiss, which has been intruded by garnet-mica leucogranitic dikes. In places, the paragneisses include clinopyroxene-hornblende-bearing psammites, garnet (grossular)-diopside marbles, and biotite-graphite phyllites. Near the memorial to the climbers, who have died on K2, above Base camp on the south spur, thin impure marbles with quartzites and mica schists, which is called the Gilkey-Puchoz sequence, are interbanded within the orthogneisses. On the west face of Broad Peak and south spur of K2, lamprophyre dikes, which consist of clinopyroxene and biotite-porphyritic vogesites and minettes, have intruded the K2 gneiss. The K2 Gneiss is separated from the surrounding sedimentary and metasedimentary rocks of the surrounding Karakroam Metamorphic Complex by normal faults. For example, a fault separates the K2 gneiss of the east face of K2 from limestones and slates comprising nearby Skyang Kangri
40Ar/39Ar ages of 115 to 120 million years ago obtained from and geochemical analyses of the K2 Gneiss demonstrate that it is a metamorphosed, older, Cretaceous, pre-collisional granite. The granitic precursor (protolith) to the K2 Gneiss originated as the result of the production of large bodies of magma by a northward-dipping subduction zone along what was the continental margin of Asia at that time and their intrusion as batholiths into its lower continental crust. During the initial collision of the Asia and Indian plates, this granitic batholith was buried to depths of about 20 kilometres (12 mi) or more, highly metamorphosed, highly deformed, and partially remelted during the Eocene Period to form gneiss. Later, the K2 Gneiss was then intruded by leucogranite dikes and finally exhumed and uplifted along major breakback thrust faults during post-Miocene time. The K2 Gneiss was exposed as the entire K2-Broad Peak-Gasherbrum range experienced rapid uplift with which erosion rates have been unable to keep pace.

Climbing history

Early attempts

The west face of K2 taken from the Savoia Glacier on the 1909 expedition
The mountain was first surveyed by a European survey team in 1856. Thomas Montgomerie was the member of the team who designated it "K2" for being the second peak of the Karakoram range. The other peaks were originally named K1, K3, K4 and K5, but were eventually renamed Masherbrum, Gasherbrum IV, Gasherbrum II and Gasherbrum I respectively.In 1892, Martin Conway led a British expedition that reached "Concordia" on the Baltoro Glacier.
The first serious attempt to climb K2 was undertaken in 1902 by Oscar Eckenstein, Aleister Crowley, Jules Jacot-Guillarmod, Heinrich Pfannl, Victor Wessely and Guy Knowles via the Northeast Ridge. In the early 1900s, modern transportation did not exist: It took "fourteen days just to reach the foot of the mountain".After five serious and costly attempts, the team reached 6,525 metres (21,407 ft)—although considering the difficulty of the challenge, and the lack of modern climbing equipment or weatherproof fabrics, Crowley's statement that "neither man nor beast was injured" highlights the pioneering spirit and bravery of the attempt. The failures were also attributed to sickness (Crowley was suffering the residual effects of malaria), a combination of questionable physical training, personality conflicts, and poor weather conditions—of 68 days spent on K2 (at the time, the record for the longest time spent at such an altitude) only eight provided clear weather.
The next expedition to K2, in 1909, led by Prince Luigi Amedeo, Duke of the Abruzzi, reached an elevation of around 6,250 metres (20,510 ft) on the South East Spur, now known as the Abruzzi Spur (or Abruzzi Ridge). This would eventually become part of the standard route, but was abandoned at the time due to its steepness and difficulty. After trying and failing to find a feasible alternative route on the West Ridge or the North East Ridge, the Duke declared that K2 would never be climbed, and the team switched its attention to Chogolisa, where the Duke came within 150 metres (490 ft) of the summit before being driven back by a storm.
K2 from the east, photographed during the 1909 expedition
The next attempt on K2 was not made until 1938, when an American expedition led by Charles Houston made a reconnaissance of the mountain. They concluded that the Abruzzi Spur was the most practical route, and reached a height of around 8,000 metres (26,000 ft) before turning back due to diminishing supplies and the threat of bad weather. The following year an expedition led by Fritz Wiessner came within 200 metres (660 ft) of the summit, but ended in disaster when Dudley Wolfe, Pasang Kikuli, Pasang Kitar and Pintso disappeared high on the mountain.[29][30]
Charles Houston returned to K2 to lead the 1953 American expedition. The expedition failed due to a storm that pinned the team down for ten days at 7,800 metres (25,590 ft), during which time Art Gilkey became critically ill. A desperate retreat followed, during which Pete Schoening saved almost the entire team during a mass fall, and Gilkey was killed, either in an avalanche or in a deliberate attempt to avoid burdening his companions. In spite of the failure and tragedy, the courage shown by the team has given the expedition iconic status in mountaineering history.

Success and repeats

Achille Compagnoni on K2's summit on the first ascent (31 July 1954)
An Italian expedition finally succeeded in ascending to the summit of K2 via the Abruzzi Spur on 31 July 1954. The expedition was led by Ardito Desio, and the two climbers who reached the summit were Lino Lacedelli and Achille Compagnoni. The team included a Pakistani member, Colonel Muhammad Ata-ullah, who had been a part of the 1953 American expedition. Also on the expedition were Walter Bonatti and Pakistani Hunza porter Amir Mehdi, who both proved vital to the expedition's success in that they carried oxygen tanks to 8,100 metres (26,600 ft) for Lacedelli and Compagnoni. The ascent is controversial because Lacedelli and Compagnoni established their camp at higher level than Medhi and Bonatti were originally told, finding out when it was too dark to descend, thus forcing Bonatti and Mehdi overnight without shelter above 8,000 meters before the latter were able to descend while leaving oxygen tanks behind as requested. Bonatti and Mehdi survived, but Mehdi was hospitalized for months and suffered amputations for frostbite. Efforts in the 1950s to suppress these facts to protect Lacedelli and Compagnoni's reputations as Italian national heroes were later brought to light. It was also revealed that the moving of the camp was deliberate, a move apparently made because Campagoni feared being outshine by the younger Bonatti. Bonatti was given the blame for Medhi's hospitalization.
On 9 August 1977, 23 years after the Italian expedition, Ichiro Yoshizawa led the second successful ascent, with Ashraf Aman as the first native Pakistani climber. The Japanese expedition took the Abruzzi Spur, and used more than 1,500 porters.
The third ascent of K2 was in 1978, via a new route, the long and corniced Northeast Ridge. The top of the route traversed left across the East Face to avoid a vertical headwall and joined the uppermost part of the Abruzzi route. This ascent was made by an American team, led by James Whittaker; the summit party was Louis Reichardt, Jim Wickwire, John Roskelley, and Rick Ridgeway. Wickwire endured an overnight bivouac about 150 metres (490 ft) below the summit, one of the highest bivouacs in history. This ascent was emotional for the American team, as they saw themselves as completing a task that had been begun by the 1938 team forty years earlier.
Another notable Japanese ascent was that of the difficult North Ridge on the Chinese side of the peak in 1982. A team from the Mountaineering Association of Japan led by Isao Shinkai and Masatsugo Konishi put three members, Naoe Sakashita, Hiroshi Yoshino, and Yukihiro Yanagisawa, on the summit on 14 August. However Yanagisawa fell and died on the descent. Four other members of the team achieved the summit the next day.
The first climber to reach the summit of K2 twice was Czech climber Josef Rakoncaj. Rakoncaj was a member of the 1983 Italian expedition led by Francesco Santon, which made the second successful ascent of the North Ridge (31 July 1983). Three years later, on 5 July 1986, he reached the summit via the Abruzzi Spur (double with Broad Peak West Face solo) as a member of Agostino da Polenza's international expedition.
The first woman to summit K2 was former Pole Wanda Rutkiewicz on 23 June 1986.
In 1986, two Polish expeditions climbed via two new routes, the Magic Line and the Polish Line. This second has not yet been repeated.
In 2004 the Spanish climber Carlos Soria Fontán became the oldest person ever to summit K2, at the age of 65.
The peak has now been climbed by almost all of its ridges. Although the summit of Everest is at a higher altitude, K2 is a much more difficult and dangerous climb, due in part to its more inclement weather and comparatively greater height from base to peak. The mountain is believed by many to be the world's most difficult and dangerous climb, hence its nickname "the Savage Mountain". It, and the surrounding peaks, have claimed more lives than any others. As of July 2010, only 302 people have completed the ascent,compared with over 2,700 who have ascended Everest. At least 80 (as of September 2010) people have died attempting the climb. Thirteen climbers from several expeditions died in the 1986 K2 Disaster, August 13, 1995 killed six mountaineers, eleven climbers died in the 2008 K2 disaster.


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