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1906: Availability of panchromatic black and white film and therefore high quality color separation color photography. PAINTING OF THE WEEK - Ruins of the Holyrood Chapel by Moonlight, oil on canvas, 1824, Louis Daguerre.
G+ #Read of the Day: The Daguerreotype - The daguerreotype, an early form of photograph, was invented by Louis Daguerre in the early 19th c. The first photograph (1826) - Joseph Niepce, a French inventor and pioneer in photography, is generally credited with producing the first photograph. Easy Peasy Fact:Following Niepcea€™s experiments, in 1829 Louis Daguerre stepped up to make some improvements on a novel idea. Background InformationSOS Children volunteers helped choose articles and made other curriculum material Sponsor a child to make a real difference.
The World Wide Web (abbreviated as WWW or W3, commonly known as the Web), is a system of interlinked hypertext documents accessed via the Internet. Using concepts from his earlier hypertext systems like ENQUIRE, British engineer, computer scientist and at that time employee of CERN, Sir Tim Berners-Lee, now Director of the World Wide Web Consortium (W3C), wrote a proposal in March 1989 for what would eventually become the World Wide Web. In March 1989, Tim Berners-Lee wrote a proposal that referenced ENQUIRE, a database and software project he had built in 1980, and described a more elaborate information management system. With help from Robert Cailliau, he published a more formal proposal (on 12 November 1990) to build a "Hypertext project" called "WorldWideWeb" (one word, also "W3") as a "web" of "hypertext documents" to be viewed by " browsers" using a client–server architecture. The proposal was modeled after the Dynatext SGML reader by Electronic Book Technology, a spin-off from the Institute for Research in Information and Scholarship at Brown University.
The crucial underlying concept of hypertext originated with older projects from the 1960s, such as the Hypertext Editing System (HES) at Brown University, Ted Nelson's Project Xanadu, and Douglas Engelbart's oN-Line System (NLS). The World Wide Web had a number of differences from other hypertext systems that were then available. Robert Cailliau, Jean-François Abramatic of IBM, and Tim Berners-Lee at the 10th anniversary of the World Wide Web Consortium.
Scholars generally agree that a turning point for the World Wide Web began with the introduction of the Mosaic web browser in 1993, a graphical browser developed by a team at the National Centre for Supercomputing Applications at the University of Illinois at Urbana-Champaign (NCSA-UIUC), led by Marc Andreessen. The World Wide Web Consortium (W3C) was founded by Tim Berners-Lee after he left the European Organization for Nuclear Research (CERN) in October 1994.
Connected by the existing Internet, other websites were created around the world, adding international standards for domain names and HTML. The terms Internet and World Wide Web are often used in everyday speech without much distinction. Viewing a web page on the World Wide Web normally begins either by typing the URL of the page into a web browser or by following a hyperlink to that page or resource. The computer receiving the HTTP request delivers it to web server software listening for requests on port 80.
The web browser parses the HTML, interpreting the markup (, for paragraph, and such) that surrounds the words in order to draw the text on the screen.
Many web pages use HTML to reference the URLs of other resources such as images, other embedded media, scripts that affect page behaviour, and Cascading Style Sheets that affect page layout. Most web pages contain hyperlinks to other related pages and perhaps to downloadable files, source documents, definitions and other web resources. Such a collection of useful, related resources, interconnected via hypertext links is dubbed a web of information.
The hyperlink structure of the WWW is described by the webgraph: the nodes of the webgraph correspond to the web pages (or URLs) the directed edges between them to the hyperlinks.
Over time, many web resources pointed to by hyperlinks disappear, relocate, or are replaced with different content. JavaScript is a scripting language that was initially developed in 1995 by Brendan Eich, then of Netscape, for use within web pages. Many domain names used for the World Wide Web begin with www because of the long-standing practice of naming Internet hosts (servers) according to the services they provide.
The use of a subdomain name is useful for load balancing incoming web traffic by creating a CNAME record that points to a cluster of web servers.
Use of the www prefix is declining as Web 2.0 web applications seek to brand their domain names and make them easily pronounceable. Every time a web page is requested from a web server the server can identify, and usually it logs, the IP address from which the request arrived. When a web page asks for, and the user supplies, personally identifiable information such as their real name, address, e-mail address, etc., then a connection can be made between the current web traffic and that individual. Social networking sites make a point of trying to get the user to truthfully expose their real names, interests and locations. Photographs and videos posted onto websites have caused particular problems, as they can add a person's face to an on-line profile.
Many users of the web erroneously assume that everything they may find on line is freely available to them as if it was in the public domain. Many formal standards and other technical specifications and software define the operation of different aspects of the World Wide Web, the Internet, and computer information exchange. Uniform Resource Identifier ( URI), which is a universal system for referencing resources on the Internet, such as hypertext documents and images. There are methods available for accessing the web in alternative mediums and formats, so as to enable use by individuals with disabilities.
The W3C Internationalization Activity assures that web technology will work in all languages, scripts, and cultures. Between 2005 and 2010, the number of Web users doubled, and was expected to surpass two billion in 2010. Statistics measuring a website's popularity are usually based either on the number of page views or on associated server ' hits' (file requests) that it receives.
Frustration over congestion issues in the Internet infrastructure and the high latency that results in slow browsing has led to a pejorative name for the World Wide Web: the World Wide Wait.
If a user revisits a Web page after only a short interval, the page data may not need to be re-obtained from the source Web server.
Wikipedia for Schools is a selection taken from the original English-language Wikipedia by the child sponsorship charity SOS Children.
Fresco of Approving of bylaw of Society of Jesus depicting Ignatius of Loyola receiving papal bull Regimini militantis Ecclesiae from Pope Paul 3.
This group bound themselves by a vow of poverty and chastity, to "enter upon hospital and missionary work in Jerusalem, or to go without questioning wherever the pope might direct".
They called themselves the Company of Jesus, and also Amigos En El Senor or "Friends in the Lord," because they felt "they were placed together by Christ." The name had echoes of the military (as in an infantry "company"), as well as of discipleship (the "companions" of Jesus). Excluding the 19 hijackers, 2,974 people died as an immediate result of the attacks with another 24 missing and presumed dead. The attacks had major ramifications around the world, with the United States declaring a War on Terrorism in response and launching an invasion of Afghanistan to depose the Taliban, who had been accused of willfully harboring terrorists. The damage to the Pentagon was cleared and repaired within a year, and a small memorial built on the site. During the hijacking of the airplanes, some passengers and crew members were able to make phone calls using the cabin GTE airphone service and mobile phones.[6][7] They reported that several hijackers were aboard each plane.
The National Institute of Standards and Technology (NIST) launched investigations into the cause of collapse for the three buildings, subsequently expanding the investigation to include questions over measures to prevent progressive collapse, such as fire resistance design and retrofitting of structural steel.
The attacks created widespread confusion among news organizations and air traffic controllers across the United States. A total of 411 emergency workers who responded to the scene died as they attempted to implement rescue and fire suppression efforts. Weeks after the attack, the estimated death toll was over 6,000.[49] The city was only able to identify remains for approximately 1,600 of the victims at the World Trade Center.
In addition to the 110-floor Twin Towers of the World Trade Center itself, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including 7 World Trade Center, 6 World Trade Center, 5 World Trade Center, 4 World Trade Center, the Marriott World Trade Center and St. Osama bin Laden's declaration of a holy war against the United States, and a fatwA? signed by bin Laden and others calling for the killing of American civilians in 1998, are seen by investigators as evidence of his motivation to commit such acts. Khalid Sheikh Mohammed was arrested on March 1, 2003 in Rawalpindi, Pakistan.[101] Mohammed ultimately ended up at Guantanamo Bay.
A variety of scholarship has also focused on bin Laden's overall strategy as a motive for the attacks. The NATO council declared that the attacks on the United States were considered an attack on all NATO nations and, as such, satisfied Article 5 of the NATO charter.[118] In the immediate aftermath of the attacks, the Bush administration declared a war on terrorism, with the stated goals of bringing Osama bin Laden and al-Qaeda to justice and preventing the emergence of other terrorist networks. Within the United States, Congress passed and President Bush signed the Homeland Security Act of 2002, creating the Department of Homeland Security, representing the largest restructuring of the U.S. Following the attacks, 80,000 Arab and Muslim immigrants were fingerprinted and registered under the Alien Registration Act of 1940. Approximately one month after the attacks, the United States led a broad coalition of international forces in the removal of the Taliban regime for harboring the al-Qaeda organization.[136] The Pakistani authorities moved decisively to align themselves with the United States in a war against the Taliban and al-Qaeda.
Various conspiracy theories have emerged subsequent to the attacks suggesting that individuals inside the United States knew the attacks were coming and deliberately chose not to prevent them, or that individuals outside of the terrorist organization al-Qaeda planned or carried out the attacks.[148] The community of civil engineers generally accepts the mainstream account that the impacts of jets at high speeds in combination with subsequent fires, rather than controlled demolition, led to the collapse of the Twin Towers. A federal technical building and fire safety investigation of the collapses of the Twin Towers and 7 WTC has been conducted by the United States Department of Commerce's National Institute of Standards and Technology (NIST). In May 2007, senators from both the Democratic Party and the Republican Party drafted legislation that would openly present an internal CIA investigative report.
North American air space was closed for several days after the attacks and air travel decreased significantly upon its reopening.
Legal disputes over the attendant costs of illnesses related to the attacks are still in the court system.
In the days immediately following the attacks, many memorials and vigils were held around the world.[187][188][189] In addition, pictures were placed all over Ground Zero. One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers which projected two vertical columns of light into the sky.[191] In New York, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site. Hi, I'm an admin for a group called sad world, and we'd love to have this added to the group! Hi, I'm an admin for a group called New York City Undertakers & Funeral Homes, and we'd love to have this added to the group!
Hi, I'm an admin for a group called WTC BEFORE 911, and we'd love to have this added to the group! Jesus said there would be some people who would kill you (obviously meaning the Christians or Christ followers) who would think they were doing a Godly service.
Talbot was active from the mid-1830s, and sits alongside Louis Daguerre as one of the fathers of the medium. Niepcea€™s photograph shows a view from the Window at Le Gras, and it only took eight hours of exposure time!The history of photography has roots in remote antiquity with the discovery of the principle of the camera obscura and the observation that some substances are visibly altered by exposure to light. Again employing the use of solvents and metal plates as a canvas, Daguerre utilized a combination of silver and iodine to make a surface more sensitive to light, thereby taking less time to develop. With a web browser, one can view web pages that may contain text, images, videos, and other multimedia, and navigate between them via hyperlinks.
At CERN, a European research organisation near Geneva situated on Swiss and French soil, Berners-Lee and Belgian computer scientist Robert Cailliau proposed in 1990 to use hypertext "to link and access information of various kinds as a web of nodes in which the user can browse at will", and they publicly introduced the project in December of the same year. Clarke predicted that satellites would someday "bring the accumulated knowledge of the world to your fingertips" using a console that would combine the functionality of the photocopier, telephone, television and a small computer, allowing data transfer and video conferencing around the globe. The Dynatext system, licensed by CERN, was technically advanced and was a key player in the extension of SGML ISO 8879:1986 to Hypermedia within HyTime, but it was considered too expensive and had an inappropriate licensing policy for use in the general high energy physics community, namely a fee for each document and each document alteration. Both Nelson and Engelbart were in turn inspired by Vannevar Bush's microfilm-based " memex", which was described in the 1945 essay " As We May Think". In his book Weaving The Web, he explains that he had repeatedly suggested that a marriage between the two technologies was possible to members of both technical communities, but when no one took up his invitation, he finally tackled the project himself. Since then, Berners-Lee has played an active role in guiding the development of web standards (such as the markup languages in which web pages are composed), and in recent years has advocated his vision of a Semantic Web.
The web browser then initiates a series of communication messages, behind the scenes, in order to fetch and display it.
The browser then requests the resource by sending an HTTP request across the Internet to the computer at that particular address.
The browser will make additional HTTP requests to the web server for these other Internet media types.

This makes hyperlinks obsolete, a phenomenon referred to in some circles as link rot and the hyperlinks affected by it are often called dead links. The hostname for a web server is often www, in the same way that it may be ftp for an FTP server, and news or nntp for a USENET news server. Since, currently, only a subdomain can be used in a CNAME, the same result cannot be achieved by using the bare domain root.
Unlike www, which has no specific purpose, these specify the communication protocol to be used for the request and response. This means delivery of HTML documents and any additional content that may be included by a document, such as images, style sheets and scripts. Equally, unless set not to do so, most web browsers record the web pages that have been requested and viewed in a history feature, and usually cache much of the content locally.
If the website uses HTTP cookies, username and password authentication, or other tracking techniques, then it will be able to relate other web visits, before and after, to the identifiable information provided. This makes the social networking experience more realistic and therefore engaging for all their users. With modern and potential facial recognition technology, it may then be possible to relate that face with other, previously anonymous, images, events and scenarios that have been imaged elsewhere. Web users who want to publish their work onto the World Wide Web, however, need to be aware of the details of the way they do it. This is almost never the case, unless the web site publishing the work clearly states that it is. Cybercrime carried out on the Web can include identity theft, fraud, espionage and intelligence gathering. Many of the documents are the work of the World Wide Web Consortium (W3C), headed by Berners-Lee, but some are produced by the Internet Engineering Task Force (IETF) and other organizations. These disabilities may be visual, auditory, physical, speech related, cognitive, neurological, or some combination therin. Beginning in 2004 or 2005, Unicode gained ground and eventually in December 2007 surpassed both ASCII and Western European as the Web's most frequently used character encoding. Speeding up the Internet is an ongoing discussion over the use of peering and QoS technologies.
Corporate and academic firewalls often cache Web resources requested by one user for the benefit of all.
Ignatius of Loyola, who after being wounded in a battle, experienced a religious conversion and composed the Spiritual Exercises to closely follow Christ. The fresco was created by Johann Christoph Handke in the Church of Our Lady Of the Snow in Olomouc after 1743. On that morning, terrorists affiliated with al-Qaeda hijacked four commercial passenger jet airliners.[1][2] The hijackers intentionally crashed two of the airliners into the World Trade Center in New York City, resulting in the collapse of both buildings soon afterward and extensive damage to nearby buildings. The overwhelming majority of casualties were civilians, including nationals from over 90 different countries.
The United States passed the USA PATRIOT Act, as many nations around the world strengthened their anti-terrorism legislation and expanded law enforcement powers.
Rebuilding the World Trade Center site has been more contentious, with controversy over possible designs as well as the pace of construction.
All international civilian air traffic was banned from landing on US soil for three days.[19] Aircraft already in flight were either turned back or redirected to airports in Canada or Mexico.
After the first tower collapsed, FDNY commanders experienced difficulties communicating evacuation orders to firefighters inside the towers due to malfunctioning radio repeater systems in the World Trade Center.
Soon after the invasion, Osama bin Laden traveled to Afghanistan where he helped organize Arab mujahideen and established the Maktab al-Khidamat (MAK) organization to resist the Soviets. It released its report on July 22, 2004, concluding that the attacks were conceived and implemented by members of al-Qaeda. At the same time, another 17 al-Qaeda members were sentenced to penalties of between six and eleven years.[106][107] On February 16, 2006, the Spanish Supreme Court reduced the Abu Dahdah penalty to 12 years because it considered that his participation in the conspiracy was not proven. These goals would be accomplished by means including economic and military sanctions against states perceived as harboring terrorists and increasing global surveillance and intelligence sharing.
There were reports of verbal abuse, attacks on mosques and other religious buildings (including the firebombing of a Hindu temple) and assaults on people, including one murder: Balbir Singh Sodhi was fatally shot on September 15, 2001. Top organizations include: Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, The Islamic Circle of North America, and the Shari'a Scholars Association of North America. Across the globe, nations offered pro-American support and solidarity.[133] Leaders in most Middle Eastern countries, including Afghanistan, condemned the attacks. The New York Stock Exchange (NYSE), the American Stock Exchange, and NASDAQ did not open on September 11 and remained closed until September 17. The attacks led to nearly a 20% cutback in air travel capacity, and severely exacerbated financial problems in the struggling U.S.
On October 17, 2006, federal judge Alvin Hellerstein rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city.[178] Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly following the attacks.
We're going to come out of this stronger than before, politically stronger, economically stronger. A witness described being unable to "get away from faces of innocent victims who were killed.
Porta (1541-1615), a wise Neapolitan, was able to get the image of well-lighted objects through a small hole in one of the faces of a dark chamber; with a convergent lens over the enlarged hole, he noticed that the images got even clearer and sharper.
Though he is most famous for his contributions to photography, he was also an accomplished painter and a developer of the diorama theatre.
As far as is known, nobody thought of bringing these two phenomena together to capture camera images in permanent form until around 1800, when Thomas Wedgwood made the first reliably documented although unsuccessful attempt. On 6 August 1991, he posted a short summary of the World Wide Web project on the alt.hypertext newsgroup. This made it possible for someone to link to another resource without action by the owner of that resource.
High-Performance Computing and Communications Initiative and the High Performance Computing and Communication Act of 1991, one of several computing developments initiated by U.S. By the end of 1994, while the total number of websites was still minute compared to present standards, quite a number of notable websites were already active, many of which are the precursors or inspiration for today's most popular services. The World Wide Web enabled the spread of information over the Internet through an easy-to-use and flexible format. It makes the request to a particular application port in the underlying Internet Protocol Suite so that the computer receiving the request can distinguish an HTTP request from other network protocols it may be servicing such as e-mail delivery; the HTTP protocol normally uses port 80. As it receives their content from the web server, the browser progressively renders the page onto the screen as specified by its HTML and these additional resources. To make web pages more interactive, some web applications also use JavaScript techniques such as Ajax ( asynchronous JavaScript and XML). This feature started appearing in early versions of Mozilla Firefox, when it still had the working title 'Firebird' in early 2003, from an earlier practice in browsers such as Lynx. The HTTP protocol is fundamental to the operation of the World Wide Web and the added encryption layer in HTTPS is essential when confidential information such as passwords or banking information are to be exchanged over the public Internet.
Unless HTTPS encryption is used, web requests and responses travel in plain text across the internet and they can be viewed, recorded and cached by intermediate systems.
In this way it is possible for a web-based organisation to develop and build a profile of the individual people who use its site or sites.
On the other hand, photographs uploaded and unguarded statements made will be identified to the individual, who may regret some decisions to publish these data. Because of image caching, mirroring and copying, it is difficult to remove an image from the World Wide Web. If artwork, photographs, writings, poems, or technical innovations are published by their creator onto a privately owned web server, then they may choose the copyright and other conditions freely themselves.
On the other hand, content owners are aware of this widespread belief, and expect that sooner or later almost everything that is published will probably be used in some capacity somewhere without their permission. Web-based vulnerabilities now outnumber traditional computer security concerns, and as measured by Google, about one in ten web pages may contain malicious code.
Some have argued that for enterprise to see security as a business opportunity rather than a cost centre, "ubiquitous, always-on digital rights management" enforced in the infrastructure by a handful of organizations must replace the hundreds of companies that today secure data and networks. Accessibility features also help others with temporary disabilities like a broken arm or the aging population as their abilities change. According to a 2001 study, there were a massive number, over 550 billion, of documents on the Web, mostly in the invisible Web, or Deep Web. HTTP requests sent by a browser will usually ask only for data that has changed since the last download.
In addition, the death of at least one person from lung disease was ruled by a medical examiner to be a result of exposure to dust from the World Trade Center's collapse, as rescue and recovery workers were exposed to airborne contaminants following the World Trade Center's collapse.
Stock exchanges were closed for almost a week, and posted enormous losses immediately upon reopening, with airline and insurance industries suffering the greatest financial losses. The selection of the Freedom Tower for the site has drawn extensive criticism, forcing the abandonment of some parts of the project.
9-1-1 dispatchers also received information from callers that was not passed along.[60] Within hours of the attack, a massive search and rescue operation was launched.
In the tape, bin Laden admits foreknowledge of the attacks.[92] The tape was broadcast on various news networks from December 13, 2001.
He said that the attacks were carried out because "we are freea€¦and want to regain freedom for our nation. In addition, the highly visible role played by New York City mayor Rudy Giuliani won him high praise nationally and in New York.[123] Many relief funds were immediately set up to assist victims of the attacks, with the task of providing financial assistance to the survivors of the attacks and to the families of victims. Congress also passed the USA PATRIOT Act, stating that it would help detect and prosecute terrorism and other crimes.
The legitimacy of these detentions has been questioned by, among others, the European Parliament, the Organization of American States, and Amnesty International.
In my opinion and conviction these hijackers were deceived and misled into the wrong faith. Pontius Pilate had no qualms with Jesus and hoped the severe beatings the Romans gave would satisfy the Priestcraft's hatred for the King.
Schulze mixes chalk, nitric acid, and silver in a flask; notices darkening on side of flask exposed to sunlight. A daguerreotype, produced on a silver-plated copper sheet, produces a mirror image photograph of the exposed scene. This date also marked the debut of the Web as a publicly available service on the Internet.
It also significantly reduced the difficulty of implementing web servers and browsers (in comparison to earlier systems), but in turn presented the chronic problem of link rot. It is reported that Microsoft was granted a US patent for the same idea in 2008, but only for mobile devices.
The English writer Douglas Adams once quipped in The Independent on Sunday (1999): "The World Wide Web is the only thing I know of whose shortened form takes three times longer to say than what it's short for". It may be able to build a record for an individual that includes information about their leisure activities, their shopping interests, their profession, and other aspects of their demographic profile. Employers, schools, parents and other relatives may be influenced by aspects of social networking profiles that the posting individual did not intend for these audiences. This is unusual though; more commonly work is uploaded to web sites and servers that are owned by other organizations. Many publishers therefore embed visible or invisible digital watermarks in their media files, sometimes charging users to receive unmarked copies for legitimate use. Most Web-based attacks take place on legitimate websites, and most, as measured by Sophos, are hosted in the United States, China and Russia.
The Web is used for receiving information as well as providing information and interacting with society.
Apart from the facilities built into Web servers that can determine when files have been updated and so need to be re-sent, designers of dynamically generated Web pages can control the HTTP headers sent back to requesting users, so that transient or sensitive pages are not cached.
These articles are available under the Creative Commons Attribution Share-Alike Version 3.0 Unported Licence.
The fourth plane crashed into a field near Shanksville in rural Somerset County, Pennsylvania after passengers and members of the flight crew on the fourth aircraft attempted to retake control of their plane.

The economy of Lower Manhattan ground to a halt, as billions of dollars in office space was damaged or destroyed.
Canada was one of the main recipients of diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers. The sagging floors pulled on the exterior steel columns to the point where exterior columns bowed inward. The Freedom Tower is currently under construction at the site and at 1,776 ft (541 m) upon completion in 2011, will become the one of the tallest buildings in North America, behind the Chicago Spire and the CN Tower in Toronto.
They were following an illusion but today I bet if you asked them they'd go back and not do it if they could come back for one moment.
But these miscreants would not be content until they saw Christ's body bloodied and hanging from a cross. The alchemist Fabricio, more or less at the same period of time, observed that silver chloride was darkened by the action of light.
Chemistry student Robert Cornelius was so fascinated by the chemical process involved in Daguerrea€™s work that he sought to make some improvements himself. Unlike predecessors such as HyperCard, the World Wide Web was non-proprietary, making it possible to develop servers and clients independently and to add extensions without licensing restrictions. Prior to the release of Mosaic, graphics were not commonly mixed with text in web pages and the Web's popularity was less than older protocols in use over the Internet, such as Gopher and Wide Area Information Servers (WAIS).
Although the two terms are sometimes conflated in popular use, World Wide Web is not synonymous with Internet. It is a collection of text documents and other resources, linked by hyperlinks and URLs, usually accessed by web browsers from web servers. It depends upon the terms and conditions of the site or service provider to what extent the original owner automatically signs over rights to their work by the choice of destination and by the act of uploading. The World Wide Web Consortium claims it essential that the Web be accessible in order to provide equal access and equal opportunity to people with disabilities. A more recent study, which used Web searches in 75 different languages to sample the Web, determined that there were over 11.5 billion Web pages in the publicly indexable Web as of the end of January 2005. With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse.
Three more towers are expected to be built between 2007 and 2012 on the site, and will be located one block east of where the original towers stood. They demanded Jesus have nails driven into his wrists, as this was not normally undertaken, even for the most hardened criminals. It was only two hundred years later that the physicist Charles made the first photographic impression, by projecting the outlines of one of his pupils on a white paper sheet impregnated with silver chloride.
It was commercially introduced in 1839, a date generally accepted as the birth year of practical photography.The metal-based daguerreotype process soon had some competition from the paper-based calotype negative and salt print processes invented by Henry Fox Talbot. And in 1839 Cornelius shot a self-portrait daguerrotype that some historians believe was the first modern photograph of a man ever produced. On 30 April 1993, CERN announced that the World Wide Web would be free to anyone, with no fees due. Mosaic's graphical user interface allowed the Web to become, by far, the most popular Internet protocol.
Many established websites still use 'www', or they invent other subdomain names such as 'www2', 'secure', etc. Tim Berners-Lee's web-space states that World Wide Web is officially spelled as three separate words, each capitalised, with no intervening hyphens. Depending on the website's terms and conditions and the local laws that apply information from these profiles may be sold, shared, or passed to other organisations without the user being informed. Through HTML and URIs the Web was vulnerable to attacks like cross-site scripting (XSS) that came with the introduction of JavaScript and were exacerbated to some degree by Web 2.0 and Ajax web design that favors the use of scripts.
The decision about expiration is made independently for each downloaded file, whether image, stylesheet, JavaScript, HTML, or other web resource.
This report, too, turned out to be in error; the plane was briefly thought to represent a hijack risk, but it responded to controllers and landed safely in Cleveland, Ohio. In addition, the report asserts that the towers' stairwells were not adequately reinforced to provide emergency escape for people above the impact zones. Coming two months after the announcement that the server implementation of the Gopher protocol was no longer free to use, this produced a rapid shift away from Gopher and towards the Web. Tim Berners-Lee was knighted in 2004 by Queen Elizabeth II for his contribution to the World Wide Web. For many ordinary people, this means little more than some unexpected e-mails in their in-box, or some uncannily relevant advertising on a future web page. Access by everyone regardless of disability is an essential aspect." Many countries regulate web accessibility as a requirement for websites.
On 25 July 2008, Google software engineers Jesse Alpert and Nissan Hajaj announced that Google Search had discovered one trillion unique URLs. Thus even on sites with highly dynamic content, many of the basic resources need to be refreshed only occasionally.
NIST stated that the final report on the collapse of 7 WTC will appear in a separate report.[156][157] This was confirmed by an independent study by Purdue University. The photos were turned into lantern slides and projected in registration with the same color filters.
For others, it can mean that time spent indulging an unusual interest can result in a deluge of further targeted marketing that may be unwelcome. International cooperation in the W3C Web Accessibility Initiative led to simple guidelines that web content authors as well as software developers can use to make the Web accessible to persons who may or may not be using assistive technology. Web site designers find it worthwhile to collate resources such as CSS data and JavaScript into a few site-wide files so that they can be cached efficiently.
In 1802, Wedgwood reproduced transparent drawings on a surface sensitized by silver nitrate and exposed to light.
Law enforcement, counter terrorism and espionage agencies can also identify, target and track individuals based on what appear to be their interests or proclivities on the web.
Nicephore Niepce (1765-1833) had the idea of using as sensitive material the bitumen, which is altered and made insoluble by light, thus keeping the images obtained unaltered. Long before the first photographs were made, Chinese philosopher Mo Ti and Greek mathematicians Aristotle and Euclid described a pinhole camera in the 5th and 4th centuries BCE.
He communicated his experiences to Daguerre (1787-1851) who noticed that a iodide-covered silver plate - thedaguerreotype -, by exposition to iodine fumes, was impressed by the action of light action, and that the almost invisible alteration could be developed with the exposition to mercury fumes. In the 6th century CE, Byzantine mathematician Anthemius of Tralles used a type of camera obscura in his experimentsIbn al-Haytham (Alhazen) (965 in Basra a€“ c. It was then fixed with a solution of potassium cyanide, which dissolves the unaltered iodine.The daguerreotype (1839) was the first practical solution for the problem of photography.
In 1841, Claudet discovered quickening substances, thanks to which exposing times were shortened.
More or less at the same time period, EnglishWilliam Henry Talbot substituted the steel daguerreotype with paper photographs (named calotype). Wilhelm Homberg described how light darkened some chemicals (photochemical effect) in 1694. Niepce of Saint-Victor (1805-1870), Nicephorea€™s cousin, invented the photographic glass plate covered with a layer of albumin, sensitized by silver iodide. The novel Giphantie (by the French Tiphaigne de la Roche, 1729a€“74) described what could be interpreted as photography.Around the year 1800, Thomas Wedgwood made the first known attempt to capture the image in a camera obscura by means of a light-sensitive substance. Maddox and Benett, between 1871 and 1878, discovered the gelatine-bromide plate, as well as how to sensitize it.
As with the bitumen process, the result appeared as a positive when it was suitably lit and viewed. A strong hot solution of common salt served to stabilize or fix the image by removing the remaining silver iodide. On 7 January 1839, this first complete practical photographic process was announced at a meeting of the French Academy of Sciences, and the news quickly spread. At first, all details of the process were withheld and specimens were shown only at Daguerre's studio, under his close supervision, to Academy members and other distinguished guests.
Paper with a coating of silver iodide was exposed in the camera and developed into a translucent negative image. Unlike a daguerreotype, which could only be copied by rephotographing it with a camera, a calotype negative could be used to make a large number of positive prints by simple contact printing.
The calotype had yet another distinction compared to other early photographic processes, in that the finished product lacked fine clarity due to its translucent paper negative. This was seen as a positive attribute for portraits because it softened the appearance of the human face.
Talbot patented this process,[20] which greatly limited its adoption, and spent many years pressing lawsuits against alleged infringers.
He attempted to enforce a very broad interpretation of his patent, earning himself the ill will of photographers who were using the related glass-based processes later introduced by other inventors, but he was eventually defeated.
Nonetheless, Talbot's developed-out silver halide negative process is the basic technology used by chemical film cameras today. Hippolyte Bayard had also developed a method of photography but delayed announcing it, and so was not recognized as its inventor.In 1839, John Herschel made the first glass negative, but his process was difficult to reproduce. The new formula was sold by the Platinotype Company in London as Sulpho-Pyrogallol Developer.Nineteenth-century experimentation with photographic processes frequently became proprietary. This adaptation influenced the design of cameras for decades and is still found in use today in some professional cameras. Petersburg, Russia studio Levitsky would first propose the idea to artificially light subjects in a studio setting using electric lighting along with daylight. In 1884 George Eastman, of Rochester, New York, developed dry gel on paper, or film, to replace the photographic plate so that a photographer no longer needed to carry boxes of plates and toxic chemicals around. Now anyone could take a photograph and leave the complex parts of the process to others, and photography became available for the mass-market in 1901 with the introduction of the Kodak Brownie.A practical means of color photography was sought from the very beginning. Results were demonstrated by Edmond Becquerel as early as 1848, but exposures lasting for hours or days were required and the captured colors were so light-sensitive they would only bear very brief inspection in dim light.The first durable color photograph was a set of three black-and-white photographs taken through red, green and blue color filters and shown superimposed by using three projectors with similar filters. It was taken by Thomas Sutton in 1861 for use in a lecture by the Scottish physicist James Clerk Maxwell, who had proposed the method in 1855.[27] The photographic emulsions then in use were insensitive to most of the spectrum, so the result was very imperfect and the demonstration was soon forgotten.
Maxwell's method is now most widely known through the early 20th century work of Sergei Prokudin-Gorskii.
Included were methods for viewing a set of three color-filtered black-and-white photographs in color without having to project them, and for using them to make full-color prints on paper.[28]The first widely used method of color photography was the Autochrome plate, commercially introduced in 1907.
If the individual filter elements were small enough, the three primary colors would blend together in the eye and produce the same additive color synthesis as the filtered projection of three separate photographs. Autochrome plates had an integral mosaic filter layer composed of millions of dyed potato starch grains. Reversal processing was used to develop each plate into a transparent positive that could be viewed directly or projected with an ordinary projector.
The mosaic filter layer absorbed about 90 percent of the light passing through, so a long exposure was required and a bright projection or viewing light was desirable. Competing screen plate products soon appeared and film-based versions were eventually made.
A complex processing operation produced complementary cyan, magenta and yellow dye images in those layers, resulting in a subtractive color image.
Kirsch at the National Institute of Standards and Technology developed a binary digital version of an existing technology, the wirephoto drum scanner, so that alphanumeric characters, diagrams, photographs and other graphics could be transferred into digital computer memory. The lab was working on the Picturephone and on the development of semiconductor bubble memory. The essence of the design was the ability to transfer charge along the surface of a semiconductor.
Michael Tompsett from Bell Labs however, who discovered that the CCD could be used as an imaging sensor.

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