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Week 1 You'll always find what you want. 2 A deep and uncharted web Space The web is hugeThe web is huge The problem is that time and space have a different.

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Presentation on theme: "Week 1 You'll always find what you want. 2 A deep and uncharted web Space The web is hugeThe web is huge The problem is that time and space have a different."— Presentation transcript:

1 Week 1 You'll always find what you want

2 2 A deep and uncharted web Space The web is hugeThe web is huge The problem is that time and space have a different meaning on the web.The problem is that time and space have a different meaning on the web. Everything that 'happens' is carved forever:Everything that 'happens' is carved forever: –try to pull something 'off the web' –Everything you write and publish will defy eternity, carved in electrons: the very moment you put something on the web, someone, somewhere, will make a copy out of it. –It is bound to reappear, somewhere sometime: indestructible and redoutable powers of the void.

3 3 A deep and uncharted web Time Time is different too.Time is different too. As anyone that has real web-experience knows, something you wrote, or published, remains unanswered - and apparently uncared of - for months, or years... and then, all of a sudden, when you almost forgot it yourself, a dozen persons begin contacting you out of the void, with an enormous and for you inexplicable interest in what you wrote so long ago.As anyone that has real web-experience knows, something you wrote, or published, remains unanswered - and apparently uncared of - for months, or years... and then, all of a sudden, when you almost forgot it yourself, a dozen persons begin contacting you out of the void, with an enormous and for you inexplicable interest in what you wrote so long ago.

4 4

5 5 Structure Four main different areas:Four main different areas: –Core –Hidden databases –Outside linkers –Outside linked Different techniques are used to access these different areas.Different techniques are used to access these different areas.

6 6 Hidden databases Hidden databases.Hidden databases. –These are pages that the Nucleus points –May (or may not) point back to the Nucleus. –For access-restrictive reasons visitors of sites located here are supposed to "pay" in order to access them. As you may imagine, these pages are NOT mutually linked. Fortunately the web was originally built in order to share knowledge.Fortunately the web was originally built in order to share knowledge. The building blocks, the "basic frames" behind the structure of the web are still the same regardless of the commercial twist.The building blocks, the "basic frames" behind the structure of the web are still the same regardless of the commercial twist.

7 7 Hidden databases If I may dare a comparison: exactly as it is pretty easy to break any software protection written in a higher language if you know (and use) assembly, so it is easy to break any server-user delivered barrier to a given database if you know (and can outflank) the protocols used by browsers and servers.If I may dare a comparison: exactly as it is pretty easy to break any software protection written in a higher language if you know (and use) assembly, so it is easy to break any server-user delivered barrier to a given database if you know (and can outflank) the protocols used by browsers and servers. As a result let's simply say that for some it is relatively easy to access all pages in this area reversing the (simple) perl or javascript tricks used to keep them "off limits".As a result let's simply say that for some it is relatively easy to access all pages in this area reversing the (simple) perl or javascript tricks used to keep them "off limits". (You wont even have to recurr to common exploits à la "politically correct" :-)(You wont even have to recurr to common exploits à la "politically correct" :-)politically correctpolitically correct

8 8 Outside linked The "outside linked".The "outside linked". The sites in this area are linked from the Nucleus but do not point back to it.The sites in this area are linked from the Nucleus but do not point back to it. For instance, the elements of a database of images, linked from the Nucleus but not necessarily pointing back to it.For instance, the elements of a database of images, linked from the Nucleus but not necessarily pointing back to it. These pages are "outside" the nucleus, yet not particularly difficult to find.These pages are "outside" the nucleus, yet not particularly difficult to find.

9 9 Outside linkers Like matter and anti-matter the "outside linked" correspond an inversed related part of the web: the "outside linkers" pages.Like matter and anti-matter the "outside linked" correspond an inversed related part of the web: the "outside linkers" pages. Indeed all the pages located in this specific area of the web do "point" to the Nucleus but are not pointed back from it.Indeed all the pages located in this specific area of the web do "point" to the Nucleus but are not pointed back from it. Imagine as an example the personal links page of a scientist: lotta interesting links to the Nucleus yet no need to publicize its existence.Imagine as an example the personal links page of a scientist: lotta interesting links to the Nucleus yet no need to publicize its existence. A page with information you may need is there, somewhere, without any link whatsoever that could bring you to it. Indeed there are no links back from the Nucleus to these pages.A page with information you may need is there, somewhere, without any link whatsoever that could bring you to it. Indeed there are no links back from the Nucleus to these pages.

10 10 Outside linkers The "outside linkers" are a part of the web you cannot reach using "normal" search techniques, since no link whatsoever points to them.The "outside linkers" are a part of the web you cannot reach using "normal" search techniques, since no link whatsoever points to them. Yet they may hoard knowledge you need. There are, fortunately, some techniques that you can apply in order to find them, the most simple and common one being 'klebing'Yet they may hoard knowledge you need. There are, fortunately, some techniques that you can apply in order to find them, the most simple and common one being 'klebing' Klebing is using the information found inside the referral fields of site loggings and statistics when your target visits your site. The trick is to lure your potential targets to an interesting page you create and keep it updated until they land there and unsuspectingly leave an entry in your web log or stat server.Klebing is using the information found inside the referral fields of site loggings and statistics when your target visits your site. The trick is to lure your potential targets to an interesting page you create and keep it updated until they land there and unsuspectingly leave an entry in your web log or stat server.

11 11 The Triad

12 12 Why Teoma Because you can refine, refine, refine... and that's it!Because you can refine, refine, refine... and that's it! This is NOT just a simple "search within these results" thingy:This is NOT just a simple "search within these results" thingy: Best choice for starting a query on BROAD topics.Best choice for starting a query on BROAD topics. Teoma is resistant to index spamming (a huge problem for Google).Teoma is resistant to index spamming (a huge problem for Google). Teoma eliminated all advertisement banners and interstitials (popups) in January 2003Teoma eliminated all advertisement banners and interstitials (popups) in January 2003 While Google's 'global linking' gives credit to every link equally, Teoma (should) instead find 'the links that count'... and count them.While Google's 'global linking' gives credit to every link equally, Teoma (should) instead find 'the links that count'... and count them. Teoma "creates on the fly clusters of web pages into topic specific web communities"Teoma "creates on the fly clusters of web pages into topic specific web communities"

13 13 Why Google With google you can forget hyperlinks: just find pages selecting a set of very peculiar words that uniquely identify a given page.With google you can forget hyperlinks: just find pages selecting a set of very peculiar words that uniquely identify a given page. Google searches inside.pdf,.doc, etc. files. Moreover, it locates the text most relevant to your specific query and highlights your keywords and its contextGoogle searches inside.pdf,.doc, etc. files. Moreover, it locates the text most relevant to your specific query and highlights your keywords and its context

14 14 Why Fast Because it is fast.Because it is fast. Because it covers parts of the web that are not covered by google.Because it covers parts of the web that are not covered by google. Because it is less polluted by the useless commercial sites. Because it mines the "deep" and "obscure" web more than google or teoma.Because it is less polluted by the useless commercial sites. Because it mines the "deep" and "obscure" web more than google or teoma. Because it is less censored than google. Because it is simply the best main engine for multi-words complex searches.Because it is less censored than google. Because it is simply the best main engine for multi-words complex searches.

15 15 Searching 1) LOWERCASE Always enter your search terms in lower case (unless you want to limit your search). Most search engine will thus find both upper and lower case occurrences of your searchstring. "pAris" is NOT the same as "paris" 1) LOWERCASE Always enter your search terms in lower case (unless you want to limit your search). Most search engine will thus find both upper and lower case occurrences of your searchstring. "pAris" is NOT the same as "paris"

16 16 Searching 2) EXACT SEQUENCE [""] Enclose terms in double quotation marks if you want to retrieve those exact terms in that exact sequence. This may be very useful in order to find a specific page. Thus "saerch engine" will retrieve some (11) pages WITH THIS SAME MISSPELLING ERROR. 2) EXACT SEQUENCE [""] Enclose terms in double quotation marks if you want to retrieve those exact terms in that exact sequence. This may be very useful in order to find a specific page. Thus "saerch engine" will retrieve some (11) pages WITH THIS SAME MISSPELLING ERROR.

17 17 Searching 3) NARROW DOWN [ AND | & | + ] and ELIMINATE MERCILESSY [ AND NOT | | | - ] Narrow your searches by linking your search terms with AND or &, or simply use the plus sign [+]. The search engine will find only those pages that contain all of your search terms. Similarly, exclude pages that are not relevant to your search by preceding the search term with AND NOT or | or simply use the minus sign [-]. +"search engines" +hints +tips +techniques -tits -sex - "make money" is better than the more simple +"search engines" +hints +tips +techniques. 3) NARROW DOWN [ AND | & | + ] and ELIMINATE MERCILESSY [ AND NOT | | | - ] Narrow your searches by linking your search terms with AND or &, or simply use the plus sign [+]. The search engine will find only those pages that contain all of your search terms. Similarly, exclude pages that are not relevant to your search by preceding the search term with AND NOT or | or simply use the minus sign [-]. +"search engines" +hints +tips +techniques -tits -sex - "make money" is better than the more simple +"search engines" +hints +tips +techniques.

18 18 Searching 4) DOWNSIDE OF THE BOOLEAN operators It's often difficult to specify exactly what you want to include or exclude. You can also get unexpected results if you are not careful about your use of operators and parentheses. For example, the search seeking OR searching AND finding is the same as the search seeking OR (searching AND finding). Both queries will find documents that contain both searching and finding, together with documents that contain the word seeking. However, the query (seeking OR searching) AND finding is not the same. It will find documents containing the word finding and, in the same document, either seeking or searching. Be careful with the boolean operators! 4) DOWNSIDE OF THE BOOLEAN operators It's often difficult to specify exactly what you want to include or exclude. You can also get unexpected results if you are not careful about your use of operators and parentheses. For example, the search seeking OR searching AND finding is the same as the search seeking OR (searching AND finding). Both queries will find documents that contain both searching and finding, together with documents that contain the word seeking. However, the query (seeking OR searching) AND finding is not the same. It will find documents containing the word finding and, in the same document, either seeking or searching. Be careful with the boolean operators!

19 19 Searching 5) "PECULIAR" strings You should always strive to use differentiating keywords when searching the web. Words that are commonly used will not help you much. Extremely common words like articles and prepositions are so worthless that they are completely ignored. Try to use words which underline the peculiarity of your target. Common words, when combined with boolean qualifiers, can be very effective. You must identify the main concepts in your topic and determine any synonyms, alternate spellings, or variant word forms for the concepts. Remember that the most "peculiar" a word, the more useful it will be in order to sharpen your search. + title:"search strateg*" +hints +tips in this case we did include the "search strateg*" string (which already has an elevate PEC) in the title: keyword. 5) "PECULIAR" strings You should always strive to use differentiating keywords when searching the web. Words that are commonly used will not help you much. Extremely common words like articles and prepositions are so worthless that they are completely ignored. Try to use words which underline the peculiarity of your target. Common words, when combined with boolean qualifiers, can be very effective. You must identify the main concepts in your topic and determine any synonyms, alternate spellings, or variant word forms for the concepts. Remember that the most "peculiar" a word, the more useful it will be in order to sharpen your search. + title:"search strateg*" +hints +tips in this case we did include the "search strateg*" string (which already has an elevate PEC) in the title: keyword.

20 20 Searching 6) ASTERISK [*] Note also the use of the asterisk [*] in the previous example: it MUST be used after at least 3 characters, it is valid for up to 5 characters or as an element of a phrase. For Altavista: 6) ASTERISK [*] Note also the use of the asterisk [*] in the previous example: it MUST be used after at least 3 characters, it is valid for up to 5 characters or as an element of a phrase. For Altavista: – Asterisk (*) : After 3 specified characters will search for matches in up to 5 trailing letters. – Question Mark (?) : After 3 specified characters will match exactly one more character. – Double Asterisk (**) More flexible as it will search for matches for an unlimited number of trailing characters. You also have the ability use the wildcards interchangeably and more than once in the same search string

21 21 Searching 7) STOP WORDS Stop words are words such as "and" "the" and "or" which search engines exclude from their searches to make them more effective. These terms are excluded because they are either extremely common or they are used by the search engine for performing more specialized searches. Just think about how many documents on the Web contain the word "the" and you'll understand how important is a good stop words list for all search engines. 7) STOP WORDS Stop words are words such as "and" "the" and "or" which search engines exclude from their searches to make them more effective. These terms are excluded because they are either extremely common or they are used by the search engine for performing more specialized searches. Just think about how many documents on the Web contain the word "the" and you'll understand how important is a good stop words list for all search engines.

22 22 Errors you encounter Bad request What does it mean? There's something wrong with the URL you typed. Maybe the server you're contacting doesn't recognize the document you're asking for, maybe it doesn't exist, or maybe you're not authorized to access it. What can you do about it? Check the URL. Pay special attention to uppercase and lowercase letters, colons, and slashes. Here's a tip: one style convention many sites observe is to slap initial capital letters on directory names but not filenames. If you get this message repeatedly, maybe the note you copied the URL from mixed up its uppercase and lowercase Bad request What does it mean? There's something wrong with the URL you typed. Maybe the server you're contacting doesn't recognize the document you're asking for, maybe it doesn't exist, or maybe you're not authorized to access it. What can you do about it? Check the URL. Pay special attention to uppercase and lowercase letters, colons, and slashes. Here's a tip: one style convention many sites observe is to slap initial capital letters on directory names but not filenames. If you get this message repeatedly, maybe the note you copied the URL from mixed up its uppercase and lowercase Unauthorized What does it mean? You're probably accessing a site that's protected and you're not on the host's preferred guest list or you typed the password incorrectly. Some sites also put a block on domain types--if you're not from a.gov or.edu domain, for example, you may not be able to gain access. What can you do about it? If you're sure you're allowed in, try again, and this time look at the keyboard when you type. Passwords are often case-sensitive, so if you've got your Caps Lock on, take it off. If you're trying to break in, we don't want to know, but the odds are stacked against you Unauthorized What does it mean? You're probably accessing a site that's protected and you're not on the host's preferred guest list or you typed the password incorrectly. Some sites also put a block on domain types--if you're not from a.gov or.edu domain, for example, you may not be able to gain access. What can you do about it? If you're sure you're allowed in, try again, and this time look at the keyboard when you type. Passwords are often case-sensitive, so if you've got your Caps Lock on, take it off. If you're trying to break in, we don't want to know, but the odds are stacked against you Forbidden What does it mean? You may not be allowed to access this document, probably because it's either blocked to your domain or it's password-protected. What can you do about it? If you know the password, try again, carefully. If you don't know the password but think you're eligible for one, contact the site's Webmaster and ask for it Forbidden What does it mean? You may not be allowed to access this document, probably because it's either blocked to your domain or it's password-protected. What can you do about it? If you know the password, try again, carefully. If you don't know the password but think you're eligible for one, contact the site's Webmaster and ask for it Not found What does it mean? The server that hosts the site can't find the HTML document at the end of the URL. It may be a simple case of a mistyped URL, but it may also mean that the document doesn't exist anymore. What can you do about it? Try going one level up (deleting the last part of the URL to the nearest slash) to see if the site is live. If it is, check if there are links to the document you're looking for. Failing that, delete the last slash and type.html (or shtml) instead, and see what that gives you Not found What does it mean? The server that hosts the site can't find the HTML document at the end of the URL. It may be a simple case of a mistyped URL, but it may also mean that the document doesn't exist anymore. What can you do about it? Try going one level up (deleting the last part of the URL to the nearest slash) to see if the site is live. If it is, check if there are links to the document you're looking for. Failing that, delete the last slash and type.html (or shtml) instead, and see what that gives you Service unavailable What does it mean? There are a variety of possibilities: your access provider's server may be down, your company's gateway (the connection between the LAN and the Internet) may be broken, or your own system isn't working. What can you do about it? This is usually an easy one: wait a minute and try again. If the error persists, identify the culprit (access provider, gateway, or your system) by process of elimination Service unavailable What does it mean? There are a variety of possibilities: your access provider's server may be down, your company's gateway (the connection between the LAN and the Internet) may be broken, or your own system isn't working. What can you do about it? This is usually an easy one: wait a minute and try again. If the error persists, identify the culprit (access provider, gateway, or your system) by process of elimination. Bad file request What does it mean? Your browser supports forms complete with data-entry fields and drop-down lists, but not the form you're trying to access. Perhaps there's an error or unsupported feature in the form. What can you do about it? Send to the Webmaster and try the form again some other day Bad file request What does it mean? Your browser supports forms complete with data-entry fields and drop-down lists, but not the form you're trying to access. Perhaps there's an error or unsupported feature in the form. What can you do about it? Send to the Webmaster and try the form again some other day

23 23 Errors you encounter Cannot add form submission result to bookmark list What does it mean? You've just entered a search request and tried to save the result as a bookmark. Though it may appear as a discrete address, the result isn't a legitimate URL, so you can't add it to your bookmark list. What can you do about it? Try saving the result page as an HTML page on your hard disk. Use the Save As command then add the saved page to your bookmark list. Depending on the CGI script behind the query, you may or may not be successful. But it's worth a try. Cannot add form submission result to bookmark list What does it mean? You've just entered a search request and tried to save the result as a bookmark. Though it may appear as a discrete address, the result isn't a legitimate URL, so you can't add it to your bookmark list. What can you do about it? Try saving the result page as an HTML page on your hard disk. Use the Save As command then add the saved page to your bookmark list. Depending on the CGI script behind the query, you may or may not be successful. But it's worth a try. Connection refused by host What does it mean? You may not be allowed to access this document, probably because it's either blocked to your domain or it's password-protected. What can you do about it? If you know the password, try again, carefully. If you don't know the password but think you're eligible for one, contact the site's Webmaster and ask for it. Connection refused by host What does it mean? You may not be allowed to access this document, probably because it's either blocked to your domain or it's password-protected. What can you do about it? If you know the password, try again, carefully. If you don't know the password but think you're eligible for one, contact the site's Webmaster and ask for it. Failed DNS lookup What does it mean? The domain name system can't translate the URL to a valid Internet address. This is either a harmless blip or the result of a mistyped URL (specifically, a mistyped host name). What can you do about it? Blips in DNS lookup are common, and often you can rectify this by clicking the Reload button. If that doesn't work, check your typing of the URL carefully. If the problem persists, try again after an hour or so. Failed DNS lookup What does it mean? The domain name system can't translate the URL to a valid Internet address. This is either a harmless blip or the result of a mistyped URL (specifically, a mistyped host name). What can you do about it? Blips in DNS lookup are common, and often you can rectify this by clicking the Reload button. If that doesn't work, check your typing of the URL carefully. If the problem persists, try again after an hour or so. File contains no data What does it mean? The site you've accessed is the right one, but there are no Web page documents on it. You may have stumbled upon this site just as updated versions are being uploaded. What can you do about it? Try the URL again, carefully. If that doesn't help, try again in an hour. File contains no data What does it mean? The site you've accessed is the right one, but there are no Web page documents on it. You may have stumbled upon this site just as updated versions are being uploaded. What can you do about it? Try the URL again, carefully. If that doesn't help, try again in an hour. Helper application not found What does it mean? Your browser doesn't recognize a file at the Web or Net site you're visiting. Most browsers can be extended using helper applications (or viewers) to read files they don't otherwise recognize. These files aren't necessarily graphics--they can be sound files, movie clips, or ZIP or SIT archive files you're trying to download. What can you do about it? The dialog box that carries this message will usually give a clue about the file type that's missing. (You may see some gibberish about octet streams, but after that you'll probably see some reference to graphic-TIFF, which gives it away.) Look at CNET's Survival Kits for your computing platform (Mac, PC, or Unix) for viewers for the most common file types. Then follow your browser's instructions for assigning a viewer for each file format you wish to view online. Helper application not found What does it mean? Your browser doesn't recognize a file at the Web or Net site you're visiting. Most browsers can be extended using helper applications (or viewers) to read files they don't otherwise recognize. These files aren't necessarily graphics--they can be sound files, movie clips, or ZIP or SIT archive files you're trying to download. What can you do about it? The dialog box that carries this message will usually give a clue about the file type that's missing. (You may see some gibberish about octet streams, but after that you'll probably see some reference to graphic-TIFF, which gives it away.) Look at CNET's Survival Kits for your computing platform (Mac, PC, or Unix) for viewers for the most common file types. Then follow your browser's instructions for assigning a viewer for each file format you wish to view online. Host unavailable What does it mean? The machine that hosts this site is probably down for maintenance. What can you do about it? If at first you don't succeed, hit Refresh or Reload again and again. But wait a while between refreshes. Host unavailable What does it mean? The machine that hosts this site is probably down for maintenance. What can you do about it? If at first you don't succeed, hit Refresh or Reload again and again. But wait a while between refreshes.

24 24 Errors you encounter Host unknown What does it mean? The server may be down for maintenance, or you may have lost the connection (your modem disconnected, or your company's T1 line is choking). What can you do about it? Hit the Reload button first. This is often a blip in the Net. Then check the URL for typos (and don't forget case-sensitivity). Then make sure you're connected by hitting Reload, which will re-establish connections in many cases. Host unknown What does it mean? The server may be down for maintenance, or you may have lost the connection (your modem disconnected, or your company's T1 line is choking). What can you do about it? Hit the Reload button first. This is often a blip in the Net. Then check the URL for typos (and don't forget case-sensitivity). Then make sure you're connected by hitting Reload, which will re-establish connections in many cases. Network connection was refused by the server What does it mean? The server is probably too busy to handle one more user, but it's not configured to generate its own message, so this generic message shows up instead. What can you do about it? As always, try and try again. If that doesn't work, wait as long as you can. Then try again. Network connection was refused by the server What does it mean? The server is probably too busy to handle one more user, but it's not configured to generate its own message, so this generic message shows up instead. What can you do about it? As always, try and try again. If that doesn't work, wait as long as you can. Then try again. NNTP server error What does it mean? You're trying to log on to a Usenet newsgroup, but you can't get to it. The Usenet server is something that's made available by your Internet service provider, so it may be that this newsgroup isn't available at all. What can you do about it? Make sure you've typed the URL correctly. If that doesn't help, try again later. If the problem persists, contact your access provider and give them a piece of your mind. NNTP server error What does it mean? You're trying to log on to a Usenet newsgroup, but you can't get to it. The Usenet server is something that's made available by your Internet service provider, so it may be that this newsgroup isn't available at all. What can you do about it? Make sure you've typed the URL correctly. If that doesn't help, try again later. If the problem persists, contact your access provider and give them a piece of your mind. Permission denied What does it mean? You're trying to upload a file to an ftp site, and the site's administrator doesn't want you to. Alternatively, you're using the wrong syntax when trying to get a file. Or maybe the site is currently too busy to handle your upload. What can you do about it? First check that you used the correct syntax. Then try again later. If the problem persists, send to the Webmaster and ask how you can upload a file to that site. Permission denied What does it mean? You're trying to upload a file to an ftp site, and the site's administrator doesn't want you to. Alternatively, you're using the wrong syntax when trying to get a file. Or maybe the site is currently too busy to handle your upload. What can you do about it? First check that you used the correct syntax. Then try again later. If the problem persists, send to the Webmaster and ask how you can upload a file to that site. Too many connections--try again later What does it mean? This is another variation on the rush-hour error message. You've picked the wrong time to call, that's all. What can you do about it? Do as it says--try again later, or keep hitting the Refresh button until you succeed. Too many connections--try again later What does it mean? This is another variation on the rush-hour error message. You've picked the wrong time to call, that's all. What can you do about it? Do as it says--try again later, or keep hitting the Refresh button until you succeed. Too many users What does it mean? No ftp site has unlimited access: physical connections or administrator policy allocate a number of anonymous users to a given site. When that number is exceeded, all who try to log on receive this message. What can you do about it? Just keep trying until you get lucky. However, on a busy site (like Netscape's the week after a big announcement) or one with very limited access rights, you may be out of luck. If so, check to see whether the site has mirrors, and try one of those. Too many users What does it mean? No ftp site has unlimited access: physical connections or administrator policy allocate a number of anonymous users to a given site. When that number is exceeded, all who try to log on receive this message. What can you do about it? Just keep trying until you get lucky. However, on a busy site (like Netscape's the week after a big announcement) or one with very limited access rights, you may be out of luck. If so, check to see whether the site has mirrors, and try one of those. Unable to locate host What does it mean? The server may be down for maintenance, or you may have lost the connection (your modem disconnected or your company's T1 line is choking). What can you do about it? Hit the Reload button first. This is often a blip in the Net. Check the URL for typos (and don't forget case-sensitivity), then make sure you're connected by hitting Reload, which will re-establish connections in many cases. Unable to locate host What does it mean? The server may be down for maintenance, or you may have lost the connection (your modem disconnected or your company's T1 line is choking). What can you do about it? Hit the Reload button first. This is often a blip in the Net. Check the URL for typos (and don't forget case-sensitivity), then make sure you're connected by hitting Reload, which will re-establish connections in many cases.

25 25 Errors you encounter Unable to locate the server What does it mean? You have either mistyped the URL, or the server doesn't exist (you may have outdated information). What can you do about it? Your mission, should you choose to accept it: enter the URL again, looking at the keyboard as you type. No luck? Check with your source to verify that the URL is correct. Unable to locate the server What does it mean? You have either mistyped the URL, or the server doesn't exist (you may have outdated information). What can you do about it? Your mission, should you choose to accept it: enter the URL again, looking at the keyboard as you type. No luck? Check with your source to verify that the URL is correct. Viewer not found What does it mean? Your browser doesn't recognize a file at the Web or Net site you're visiting. Viewable files aren't necessarily graphics--they can be sound files, movie clips, ZIP or SIT archive files, and so on. If it's not a GIF or JPEG file, your browser may not know what it is. What can you do about it? The dialog box that carries this message will usually give a clue about the file type that's missing. (You may see some gibberish about octet streams, but after that you'll probably see some reference to graphic-TIFF, which gives it away.) Look at CNET's Survival Kits for your computing platform (Mac, PC, or Unix) for viewers for the most common file types. Then follow your browser's instructions for assigning a viewer for each file format you wish to view online. Viewer not found What does it mean? Your browser doesn't recognize a file at the Web or Net site you're visiting. Viewable files aren't necessarily graphics--they can be sound files, movie clips, ZIP or SIT archive files, and so on. If it's not a GIF or JPEG file, your browser may not know what it is. What can you do about it? The dialog box that carries this message will usually give a clue about the file type that's missing. (You may see some gibberish about octet streams, but after that you'll probably see some reference to graphic-TIFF, which gives it away.) Look at CNET's Survival Kits for your computing platform (Mac, PC, or Unix) for viewers for the most common file types. Then follow your browser's instructions for assigning a viewer for each file format you wish to view online. You can't log on as an anonymous user What does it mean? This message covers a multitude of sins. Some ftp sites allow people who aren't members, some don't. Others may allow nonmembers, but limit the number of visitors. Another possibility is that your browser doesn't support anonymous ftp access. The way most browsers handle this is to submit "anonymous" as the user ID and your address as the password. The America Online browser is one of the few that don't do this. What can you do about it? Either try again later after the rush hour or enter your user ID and password manually (using ftp software such as WS-FTP). Remember: your ID is anonymous and your password is your (I hope for you bogus) address. You can't log on as an anonymous user What does it mean? This message covers a multitude of sins. Some ftp sites allow people who aren't members, some don't. Others may allow nonmembers, but limit the number of visitors. Another possibility is that your browser doesn't support anonymous ftp access. The way most browsers handle this is to submit "anonymous" as the user ID and your address as the password. The America Online browser is one of the few that don't do this. What can you do about it? Either try again later after the rush hour or enter your user ID and password manually (using ftp software such as WS-FTP). Remember: your ID is anonymous and your password is your (I hope for you bogus) address.

26 26 Project #1 Part II Building the Zen of awarenessBuilding the Zen of awareness

27 27 Cat burglars in the museum after dark Our TargetOur Target –http://gallica.bnf.fr/ "70000 documents numérisés, une navigation plus intuitive, cette nouvelle version de Gallica constitue la mise à jour la plus importante depuis la création de ce serveur en octobre 1997.

28 28

29 29 Find Me In the Museum

30 30 Become One With Your Environment RelaxRelax If you focus you are trying too hard and you will miss what is happening.If you focus you are trying too hard and you will miss what is happening. Try for 15 minutes then take a break and do something else while your mind explores the problem…laterallyTry for 15 minutes then take a break and do something else while your mind explores the problem…laterally What kind of things is this browser loading?What kind of things is this browser loading?

31 31 An Outside Linker? Can you find it?

32 32

33 33 Hints to Find Me Scripts can be used to acquire the targetScripts can be used to acquire the target

34 34 What to Submit Either the photo (*.jpg)Either the photo (*.jpg) Or a short (~900 word) essay on:Or a short (~900 word) essay on: –How you think the museum is organized (diagrams would be helpful) –Why you were unable to find the picture –Your thoughts on the ‘outside linker’ where is it… why you cant find it…what is used for –Other interesting observations you may have collected

35 35 ‘Research ?’

36 36 “p” or ‘photograph’

37 37 Try a photo…..

38 38 Become One With the Screen Catalog number What’s this?

39 39 mediator.exe Catalogue number

40 40 What is mediator.exe?


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