MauritshuisThe Hague Art historians have equated certain globular highlights of light-toned paint found in many of Vermeer's paintings with circles of confusion that the artist presumably have observed through a camera obscura. It must be assumed that once Vermeer had understood how the disks of confusion are produced by the camera obscura and how to imitate them with paint, he employed them with considerable artistic license in order to enhance the effect of light as it plays upon natural surface. Although Dutch painters experimented with a number of techniques to represent highlightswhich are key to creating the illusion of light conditions usually intenseon shiny surface texturesonly Vermeer adopted circular highlight in a methodical manner. Perhaps the only other instance in Dutch painting of such highlights are those on a pair of slippers in the foreground of Gabriel Metsu 's — Woman Reading a Letter, a picture that was likely inspired by Vermeer himself.
Files with such dangerous double file extensions are executable programs perhaps malicious programs that are pretending to be a picture, a document, text, or a webpage. Such mistakes in English text in an e-mail apparently from a native speaker of English should alert the reader to the possibility of e-mail from a forged address, which may contain a malicious program.
Firewall It is good practice to erect a "firewall" between parts of a computer system that an external user can access e. Many hackers run programs that randomly search the Internet and probe ports on computers that are connected to the Internet. Worse, hackers may also hijack the victim's computer and use it to launch their illegal attacks on other computers.
Some hackers randomly search the Internet, probing ports controlled by a malicious program called SubSeven. When the hacker finds a computer that contains SubSeven and is not protected by a firewall, the hacker can access the victim's computer through the backdoor provided by SubSeven.
That statistic convinced me that firewall software is prudent on every computer connected to the Internet. This dramatic increase in the number of attempts per hour to access my computer shows that the Internet is becoming a more dangerous place and that firewall software is necessary for a secure computer.
The cost of having a separate computer that is dedicated solely to receiving incoming modem connections and requests from the Internet i. For example, this document that you are reading was obtained via the Internet from a computer in Pittsburgh, which provides webhosting service, for which I pay a monthly fee.
Here are some hints about how to make a computer secure from incoming commands: Set terminal emulator software so that the modem either never answers an incoming telephone call or answers on the 99th ring and also connect a telephone answering machine to the modem's line to pick up on the fourth ring, so there is never a 99th ring.
Do not install any software that allows even an authorized user to access the computer remotely, via a modem. The state-of-the-art analog modem in i.
The cable or DSL service is always connected to the Internet, unlike the modem on an ordinary voice-grade telephone line. Cable or DSL makes a user more vulnerable to intrusions by hackers in two different ways: The static IP address allows a hacker to return to the victim's computer, once the hacker has found that victim's computer has no firewall or an ineffective firewall.
If a computer is on all the time, hackers have continuous access to that computer, since cable or DSL is always connected to the Internet. For these reasons, firewall software is more essential if one uses either cable television or DSL for an Internet connection.
Avoiding harassment For casual on-line activities, you can establish a free e-mail account at Yahoo, HotMail, or some other provider, and use an alias for that account. If someone harasses or stalks you, then you simply close that account and chose another alias.
In other words, you adopt a disposable identity for your life in cyberspace. Never give out your real name, address, city, telephone number, or other identifying information to a stranger in a chat room, computer bulletin board, or other public place. Obviously, this simple solution has disadvantages.
I wouldn't get many clients if I used an alias like "CyberRocket" or "Wolverine" at my website.
That having been said, it is worthwhile to alert people to the existence of phishing. People first encounter phishing when they receive a fraudulent e-mail that typically purports to be from a bank, credit card company, or other financial institution.
The e-mail might mention something about your account is suspended until you "verify", "update", or "validate" some information. The e-mail invites you to click on a link in the e-mail.
The link typically takes you to a webserver located in a foreign country and operated by criminals, who display webpages with the logo and trademarks of a bank, credit card company, or government agency, which makes the webpage appear legitimate. It is trivial for people familiar with HTML and webbrowsers to download some webpages from a legitimate financial institution, make some changes to the text, then upload those bogus webpages to a criminal's webserver.
The bogus webpages really do appear legitimate because much of each bogus webpage is an exact copy of the real institution's webpage.
The bogus webpage asks you to supply your account numbers, passwords, and other personal information e. Citibank has been a popular target for phishers.
In response, Citibank posted a webpage on some specific phishing e-mails. Backups If a computer virus or an invading hacker deletes your files, or either one corrupts your files, the easiest way to restore your computer may be to reformat the hard drive s and then copy files from a recent backup.
Backups also offer protection from more common and less exotic threats such as accidental deletion of a file by an authorized user or failure of a hard disk drive. Because making a backup is a chore that takes anywhere from a few minutes to more than an hour depending on the amount of files copied to the backup medium and the speed of the backup deviceand because backup copies are rarely needed, most users do not make backups as frequently as they should.
The interval between backups should be determined by the amount of data files that you can afford to lose.“This sketch of an ambitious Westminster politician and dinner-party hostess (Kristin Scott Thomas), whose life comes spectacularly apart before the canapés are even served, is a consummate drawing-room divertissement, played with relish by a dream ensemble.”— Guy Lodge, Variety.
anonymity and ease of sharing information, piracy has become a very real issue for companies, both in and out of the workplace.
Piracy can be segmented into two main industries; the multimedia industry which involves the copying of songs, videos and games, and the software industry which is the copying of software licences. The free Computers research paper (Software Piracy essay) presented on this page should not be viewed as a sample of our on-line writing service.
If you need fresh and competent research / writing on Computers, use the . The Essential Vermeer Glossary of Art-Related Terms: D - I.
This glossary contains a number of recurrent terms found on the present site which may not be clear to all readers, especially when employed within the context of an art discussion. Arturo Toscanini (Italian: [arˈtuːro toskaˈniːni]; March 25, – January 16, ) was an Italian benjaminpohle.com was one of the most acclaimed musicians of the late 19th and of the 20th century, renowned for his intensity, his perfectionism, his ear for orchestral detail and sonority, and his eidetic memory.
He was at various times the music director of La Scala in Milan, the. Piracy in the Media In today’s technological age and consumer-driven economy, it is not a surprise that media piracy is a big business.
It is estimated that in one year $ billion worth of business is stolen from original manufacturers by media pirating.