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| | Null |
 | | In computer programming, null is a special value for a pointer (or reference) that is used to signify that the pointer's target is not a valid data element. | | | In a null cipher, most of the characters may be nulls. | | | Often, 0 (zero) is used as the null value, as most operating systems consider it an error to try to access such a low memory address. |
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http://www.brainyencyclopedia.com/encyclopedia/n/nu/null.html
(402 words)
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| | Null |
| | NULL is defined in several ANSI headers as the symbolic constant (void *)0. | | | The null at the end can be coded by using the escape sequence '\0'. | | | A null character is used to terminate the string. |
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http://www.phim.unibe.ch/comp_doc/c_manual/C/SYNTAX/null.html
(107 words)
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| | Null hypothesis - Wikipedia, the free encyclopedia |
| | A null hypothesis is only useful if it is possible to calculate the probability of observing a data set with particular parameters from it. | | | Null) approaches 0, in other words, we can reject the null when it's virtually certain to be true. | | | When a null hypothesis is formed, it is always in contrast to an implicit alternative hypothesis, which is accepted if the observed data values are sufficiently improbable under the null hypothesis. |
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http://www.wikipedia.org/wiki/Null_hypothesis
(873 words)
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| | Null character - Wikipedia, the free encyclopedia |
| | The null character (also null terminator) is a character with the value zero, present in the ASCII and Unicode character sets, and available in nearly all mainstream programming languages. | | | In null-terminated strings, the first occurring null character is interpreted as the end of the string. | | | Strings ending in a null character are said to be null-terminated. |
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http://en.wikipedia.org/wiki/Null_character
(611 words)
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| | Interpreting Null Results |
| | I prefer the terms null findings or null results to null effect as null effect suggests that there is no effect present whereas null findings or null results suggest that no effect was detected but may exist. | | | Null hypothesis significance testing do not allow for conclusions about the likelihood that the null hypothesis is true, only whether it is unlikely that null is true. | | | Support for the null hypothesis (e.g., accepting the null) is a tenuous proposition. |
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http://www.jasnh.com/a6.htm
(3175 words)
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| | NULL - The Ultimate Computer Language [rec.humor.funny] |
| | NULL is the culmination of five years of work by a team of language designers and computer science mathematicians. | | | These are just a few of the many ways NULL is superior to all current computer languages. | | | A NULL compiler can be written first in NULL without ever needing to be written in a lower level language. |
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http://www.netfunny.com/rhf/jokes/new90/nullang.html
(455 words)
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| | PHP: NULL - Manual |
| | The null type was introduced in PHP 4. | | | It treats NULL as the constant and unsets the variable. | | | So, in most cases I found that we needed to use !isset($var) intead of is_null($var) and then set $var = NULL if the variable needs to be used later to guarantee that $var is a valid variable with a NULL value instead of being undefined. |
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http://www.php.net/manual/en/language.types.null.php
(872 words)
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| | AskTom "Null And Not Null" |
| | NULLs are optional - NULLs are used to represent "i don't know" 0 is a value NULL is the absence of a value - it is "nothing" You can chose to use 0 with NOT NULL and default the column -- if it makes sense. | | | Another difference is that null is not included in an index. | | | However a not null, can use the index and not need to do a full scan. |
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http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:21390168255454
(280 words)
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| | Encyclopedia4U - Null space - Encyclopedia Article |
| | The null space (also spelled nullspace) of an m by n matrix A is the set of all vectors v which are solutions to the equation: | | | The right singular vectors of A corresponding to zero singular values form an orthonormal basis for the null space of A. | | | In set notation, Null A = {v: v is in R |
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http://www.encyclopedia4u.com/n/null-space.html
(198 words)
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| | Left Null Space |
| | The Left Null Space of a matrix is the null space of its transpose, i.e. | | | The procedure is no different than that used to compute the null space of A itself. | | | If one understands the concept of a null space, the left null space is extremely easy to understand. |
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http://cnx.rice.edu/content/m10292/latest
(221 words)
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| | Gary Null Complete Encyclopedia Of Editions - Direct Textbook |
| | Ph.D. Gary Null - Kensington Books - 0887233120 | | | Gary Null - Kensington Publishing Corp. - 0887232361 | | | Gary Null - Kensington Publishing Corporation - 0758213166 |
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http://www.directtextbook.com/editions/gary-null-complete-encyclopedia-of
(163 words)
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| | INF: BCP and NULL Values |
| | The string "NULL" couldn't be properly written to the output file, because this would be a valid string, and upon input be loaded as the string "NULL," not the value NULL. | | | The only non-ambiguous way to represent NULL in character-mode BCP is by using two adjacent delimiters in a character-delimited file. | | | Although spaces in the input data file may seem to intuitively represent NULL, the ASCII space (0x20) is also a legitimate character, with possible significance. |
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http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q98620
(713 words)
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| | Statistics Glossary - hypothesis testing |
| | If we do not reject the null hypothesis, it may still be false (a type II error) as the sample may not be big enough to identify the falseness of the null hypothesis (especially if the truth is very close to hypothesis). | | | Presumably, we would want to test the null hypothesis against the first alternative hypothesis since it would be useful to know if there is likely to be less than 50 matches, on average, in a box (no one would complain if they get the correct number of matches in a box or more). |
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http://www.stats.gla.ac.uk/steps/glossary/hypothesis_testing.html
(2225 words)
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| | NULL in Oracle |
| | The set null command in SQL*Plus defines how nulls are displayed in a resultset. | | | A way to view NULLs: NULL is defined as being not-equal to everything else, including another NULL. | | | A column in a table can be defined with the not null constraint. |
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http://www.adp-gmbh.ch/ora/misc/null.html
(239 words)
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| | Web services tip: Representations of null in XML Schema |
| | Represent a null value in the XML-equivalent of a field when you map a null Java™ bean field to XML. | | | Imagine an array of four elements, for example, whose values are {0, null, 1, null}. | | | , even when its value is null, still has a placeholder for its value which indicates that it is, indeed, null. |
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http://www-128.ibm.com/developerworks/xml/library/ws-tip-null.html
(1100 words)
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| | Null equals undefined, but null doesnt strictly equal undefined - Flash Insider |
| | Null is equal to undefined in value, but not type so null is not strictly equal to undefined. | | | Also null evaluated to 0 in a numeric sense Undefined if used to explain that a variable has no value before a specific value has been assigned or even before the variable has been declared. | | | Null equals undefined, but null doesnt strictly equal undefined |
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http://www.flashinsider.com/2005/07/25/null-equals-undefined-but-null-doesn-t-strictly-equal-undefined
(1049 words)
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| | 10.4 Null Pointers |
| | In general, C does not initialize pointers to null for you, and it never tests pointers to see if they are null before using them. | | | A function that returns pointer values can return a null pointer when it is unable to perform its task. | | | If one of the pointers in your programs points somewhere some of the time but not all of the time, an excellent convention to use is to set it to a null pointer when it doesn't point anywhere valid, and to test to see if it's a null pointer before using it. |
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http://www.sis.pitt.edu/~ir/KS/Data/SSummit/sx10d.html
(701 words)
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| | Firebird Null Guide |
| | or A is null and B is not null | | | or A is not null and B is null) then... | | | In the table we don't write NULL in the expressions (as said, this is often illegal); instead, we use two entities A and B that are both NULL. |
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http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_firebird_null
(3083 words)
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| | NULL Handling in SQLite |
| | The goal is to make SQLite handle NULLs in a standards-compliant way. | | | This involved making NULLs indistinct for the purposes of the SELECT DISTINCT statement and for the UNION operator in a SELECT. | | | And the SQL standards documents suggest that NULLs should be distinct everywhere. |
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http://www.sqlite.org/nulls.html
(768 words)
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| | NULL session access |
| | Gaining NULL session access to an NT\W2000 system is the number one method for hackers to enumerating information about an NT\W2000 machine. | | | A null session can only be made to TCP port 139, but the above other ports are often required for code to be called effectively. | | | Port 135 for example is used for RPC endpoint mapping. |
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http://www.softheap.com/security/session-access.html
(578 words)
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| | Null Space |
| | One important aspect and use of null spaces is their ability to inform us about the uniqueness of solutions. | | | This line is precisely the null space of A. | | | There is a great deal more to finding null spaces; enough, in fact, to warrant another module. |
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http://cnx.rice.edu/content/m10293/latest
(516 words)
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| | Forum OpenACS Development: PgBindCmd turns the empty string into NULL |
| | The empty string is NULL in Oracle so the suggestion to use undefined Tcl vars as a flag and the empty string as the empty string would introduce differences in behavior between the Oracle and PG version. | | | Also using undefined Tcl vars as a flag for NULL would, in itself, be very error prone. | | | This means that you can't pass in null and have it work out. |
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http://openacs.org/forums/message-view?message_id=29109
(1122 words)
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| | CIRT @ CIS @ Brown |
| | The NULL session vulnerability is fairly widespread, however the introduction of Windows XP and Windows 2003 has made it far less useful. | | | You can establish a NULL session with a Windows host by logging on with a NULL user name and password. | | | rr.sans.org/win/null.php - “NULL sessions In NT/2000” - Perhaps the best description of why NULL sessions exist, and general NULL session facts includes a complete description of how NetBIOS NULL sessions are used in a Windows networking environment. |
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http://www.brown.edu/Facilities/CIS/CIRT/help/netbiosnull.html
(1635 words)
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| | RS232 serial null modem cable wiring and tutorial |
| | The terminology null modem for the situation where two computers communicate directly is so often used nowadays, that most people don't realize anymore the origin of the phrase and that a null modem connection is an exception, not the rule. | | | The simple null modem cable and the null modem cable with loop back handshaking are useful, but have no provisions for hardware flow control. | | | The main use of null modem cables is file transfer between two computers. |
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http://www.lammertbies.nl/comm/info/RS-232_null_modem.html
(2185 words)
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| | Null - Wikipedia, the free encyclopedia |
| | Null, in science fiction null space is sometimes a dimension or space related to subspace. | | | Look up Null in Wiktionary, the free dictionary | | | Null, a concept in electromagnetism and theoretical physics. |
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http://en.wikipedia.org/wiki/Null
(112 words)
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| | SETI Editorial: Testing the Null Hypothesis |
| | And I think that the scientific method (proving the null hypothesis false) is rarely used in general problem solving. | | | Scientific method: The null hypothesis is 'I cannot afford the car'. | | | As a scientist, a mathematician, a physician, and a generally philosophical person, I like to think I know a little bit about problem solving and logic. |
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http://www.setileague.org/editor/null.htm
(609 words)
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| | CLHS: System Class NULL |
| | The only object of type null is nil, which represents the empty list and can also be notated |
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http://www.lisp.org/HyperSpec/Body/syscla_null.html
(30 words)
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| | A Critical Look at Gary Null's Activities and Credentials |
| | Since Null's thesis was published in 1989, I don't see how "updated versions" of it could have been published in 1981 and 1984. | | | My MEDLINE search for "Null G" found only one article that was coauthored by Null and appeared in a pharmacy magazine [11]. | | | According to the infomercial company's president, the interview was taped for another purpose, was dubbed into the infomercial without Null's knowledge or consent, and was deleted from the infomercial after Null demanded its removal [3]. |
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http://www.quackwatch.org/04ConsumerEducation/null.html
(2441 words)
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| | How to enable null session shares on a Windows 2000-based computer |
| | When you do so, anonymous (null) session connections are prevented on the computers on which this policy is applied. | | | This article describes how to enable null session shares on a computer that is running Windows 2000. | | | When you configure null session shares, you must first explicitly enable null session access on shares or named pipes. |
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http://support.microsoft.com/default.aspx?scid=kb;en-us;289655
(614 words)
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| | Allen Browne - Common Errors with Null |
| | Whenever you assign the value of a field to a non-variant, you must consider the possibility that the field may be null. | | | Maths involving a Null usually results in Null. | | | For example, the nulls are counted in this kind of query: |
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http://allenbrowne.com/casu-12.html
(722 words)
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| | Null Modem Cable |
| | I've spent hours doing this in an attempt to play network games and have found the null modem setup the cheapest solution when the computers are reasonably close together. | | | There is more than one null modem config used. | | | I have been amazed at how many different pin-outs there are for a null modem cable. |
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http://www.vision.net.au/~timotsc/null/nullmodem.htm
(1693 words)
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| | Clan NULL - Clan Operations |
| | This badge is the ultimate goal of all NULL members. | | | The symbol of NULL, awarded for individual displays of courage, honor, and exceptional playing skill. | | | Awarded to those who have contributed money to help provide NULL with a gaming server to conduct clan operations. |
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http://www.clannull.com/clanops.php
(486 words)
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| | Null Pointers |
| | I just can't understand all this null pointer stuff. | | | be defined on a machine which uses a nonzero bit pattern as the internal representation of a null pointer? | | | 5.18 Is a run-time integral value of 0, cast to a pointer, guaranteed to be a null pointer? |
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http://c-faq.com/s5.html
(237 words)
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| | Null Session |
| | However, it does prevent most of the information leaks available over the null session, primarily enumeration of user accounts and shares. | | | This fix is known to break "Trusts" in Windows NT and Windows 2000 machines. | | | There is no definitive list of what will and will not work relative to your environment. |
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http://rusecure.rutgers.edu/add_sec_meas/nullssn.php
(578 words)
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| | Amazon.com: The Complete Encyclopedia of Natural Healing: Books: Gary, Ph.D. Null |
| | Gary Null's Ultimate Anti-Aging Program by Gary Phd Null | | | In my opinion, of the 30 or so Dr. Null books that I have read, this is the best, and is in a category all by itself. | | | Unfortunately, references to scientific research are missing, undermining the often solid advice that Null provides. |
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http://www.amazon.com/exec/obidos/tg/detail/-/0758202113?v=glance
(1547 words)
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| | AskTom "unique index with null values" |
| | Similarly what to do for column which was NULL now need to implement NOT NULL constraint. | | | how about create unique index t_idx on t(case when source_id is not null then ID end, case when source_id is not null then NAME end); that is, index id,name when source_id is not null and index NULL,NULL (which won't be indexed in that b*tree index) when it is... | | | I guess you meant: create unique index t_idx on t(case when source_id is not null then SOURCE_ID end, case when source_id is not null then NAME end); |
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http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:39951226964354
(682 words)
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| | Aids Dissidents Speak Out |
| | Gary Null interview with Dr. David Rasnick, 7/13/98. |
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http://www.garynull.com/Documents/aids.htm
(13443 words)
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| | Epinions.com - null's profile |
| | Christopher Null is an established entertainment and technology writer with more than 10 years experience as a journalist. |
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http://www.epinions.com/user-null
(297 words)
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| | Verified Null-Move Pruning |
| | Donninger, C. Null move and deep search: Selective search heuristics for obtuse chess programs. | | | , this implies that the position is a zugzwang, as the value from the null move is greater than or equal to the value from the best move. | | | In such cases, we restore the original depth (which was reduced by one ply after the fail-high indication), and conduct a re-search to obtain the correct value. |
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http://www.cs.biu.ac.il/~davoudo/pubs/vrfd_null.html
(3300 words)
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| | About NULL Sessions |
| | The original purpose of NULL sessions is to allow unauthenticated hosts to obtain browse lists from NT servers and participate in MS networking. | | | Even non-programmer Admins should read through this and become familiar with the API's explained in order to better understand the NT environment and recognize code that might be used against them. | | | however, NULL Sessions are the one case where 'everyone' could mean 'anyone'. |
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http://downloads.securityfocus.com/library/null.sessions.html
(498 words)
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| | Jason’s postings and stuff » null |
| | Posted in null at 1:02 pm by jasonb | | | Posted in null at 9:28 am by jasonb | | | Posted in null at 1:17 am by jasonb |
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http://edseek.com/archives/category/null
(719 words)
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| | freshmeat.net: Project details for Null httpd |
| | Null httpd is a very small, simple and multithreaded web server for Linux and Windows. | | | This release fixes a remotely triggerable segfault caused by malicious HTTP request headers, fixes XSS filtering in 404 responses, and fixes segfaults on failed DNS lookups. |
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http://freshmeat.net/releases/97910
(132 words)
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| | Enumeration though null sessions Remediation Resources |
| | By explicitly connecting to the target box as the Null user via the [net use \\server "" /user:""] command and then making NET* enumeration API calls like NetServerGetInfo (supported by the Netapi32 library), you will be well on your way to enumerating username and policy data on the target system." | | | The above is excerpted from a very informative article discussing authentication, authorization and null sessions. | | | " The NULL session and the Guest account have been shrouded in mystery for some time. |
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http://www.cit.cornell.edu/computer/security/scanning/windows/nullsessions.html
(294 words)
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| | Sygate Security Alert |
| | The Null user account is included in the Windows 'Everyone' group. | | | This built-in account was initially designed to allow unauthenticated computers to view the list of users and access files or shares. | | | Sygate SSE and SPF Security Agents build 1109 will monitor all incoming NetBIOS connections and block any connection using the Null user account. |
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http://www.sygate.com/alerts/Netbios_Null_Attack.htm
(124 words)
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| | Flash MX 2004 -- |
| | if (tree.left == null) { tree.left = new TreeNode(); } | | | In this statement, a binary tree node has no left child, so the field for its left child could be set to | | | Can I use null to delete an Array? |
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http://livedocs.macromedia.com/flash/mx2004/main_7_2/00001606.html
(97 words)
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| | Sutro Press / Five Stars! How to Become a Film Critic, The World's Greatest Job |
| | Author Christopher Null is founder and Editor-in-Chief of the popular web site filmcritic.com; he has reviewed movies professionally since 1994. | | | Author Christopher Null is founder and Editor-in-Chief of the popular web site filmcritic.com; he also works as a magazine editor in San Francisco. | | | Veteran film critic Christopher Null teaches you, step by step, how to break into the business with the lessons he's learned from more than a decade in the industry. |
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http://www.sutropress.com
(1296 words)
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