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Topic: Utility functions


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In the News (Thu 31 Dec 09)

  
  Time Utility Functions
Utility may be cumulative as a function of the progress of (e.g., execution time received by) the action, as discussed on the Progressive Utility page, but here we confine ourselves to the case where the utility is established only when the action completes.
More generally, utility may be a multi-variable function of other factors in addition to time (e.g., power consumption, duty cycle), but such cases are beyond the scope of this introductory discussion.
When a deadline is expressed functionally in terms of lateness, as shown in Figure 4, it has a slope of +1 and is inconsistent with the convention of the time/utility function model that larger utility values correspond to better timeliness.
www.real-time.org /timeutilityfunctions.htm   (0 words)

  
 Utility Functions - Stochastic Decision Analysis - Numericana
Utilities have an upper limit, not necessarily a maximum.) This may be visualized by considering that the utility function of money, which is normally nondecreasing, may either have an asymptote or be constant above a certain point.
In real life, utilities are not linearly related to money values (or else the lotteries would go out of business), which is another way to say that the mathematical expectation of a monetary gamble need not be the proper utility measure to use.
It's therefore customary, when using the exponential utility function, to consider that x is the amount to be gained or lost in a given gamble.
home.att.net /~numericana/answer/utility.htm   (0 words)

  
 Utility Functions
The utility function used in the portfolio problem is:
For small values of x, there is a large increase in utility or satisfaction.
Other functions can be used to model a person's utility for money.
www-fp.mcs.anl.gov /otc/Guide/CaseStudies/port/utility.html   (184 words)

  
 The Old Joel on Software Forum - Utility functions?
Functions that don't relate specifically to one class so there is no object that should "know" how to do this, but need to be included anyway.
Utilities (if they really are utilities) are more a language extension than an operation on a class and there are far fewer real utilities than may be thought.
For instance, a 'reverse string in place' function belongs in a String class (though an entire tome the size of a volume of the Encyclopedia Brittanica could be written on the grotesque examples of String classes there are), and not in a separate function.
discuss.fogcreek.com /joelonsoftware/default.asp?cmd=show&ixPost=31915   (1686 words)

  
 Utility Function FAQ's
The various Utility Functions are discussed below in sequence.
This feature is accessed from the Utility Functions form.
Client files may also be populated with the names of data files using the artificial intelligence of the client data file naming utility.
www.balaboss.com /faq_utility_function.htm   (0 words)

  
 String Utility Functions   (Site not responding. Last check: )
function but safer, since it calculates the maximum space required and allocates memory to hold the result.
In versions of GLib prior to 1.2.3, this function may return -1 if the output was truncated, and the truncated string may not be NULL-terminated.
function to handle the conversion, but if the string is not completely converted it attempts the conversion again in the "C" locale, and returns the best match.
developer.gnome.org /doc/API/glib/glib-string-utility-functions.html   (739 words)

  
  14.14.2.5 Utility functions
This function is similar to the cast operator in C. It returns a new instance of
Windows only: This function is a hook which allows to implement inprocess COM servers with ctypes.
This function resizes the internal memory buffer of obj, which must be an instance of a ctypes type.
docs.python.org /lib/ctypes-utility-functions.html   (725 words)

  
  Utility Theory - UTILITY THEORY, UTILITY THEORY AND DEMAND, UTILITY FUNCTIONS, ASSUMPTIONS ON PREFERENCES
Thus, utility theory assumes that any decision is made on the basis of the utility maximization principle, according to which the best choice is the one that provides the highest utility (satisfaction) to the decision maker.
In the former case, a utility function is used to derive a numerical score for each choice that represents the utility of this choice.
For instance, a utility of 100 units towards a cup of tea is twice as desirable as a cup of coffee with a utility level of 50 units.
www.referenceforbusiness.com /management/Tr-Z/Utility-Theory.html   (905 words)

  
 Utility Functions
In Chapter 5 and later there will be many more such functions which will approximates roots, integrals and solutions to differential equations.
In other words, you enter one matrix for the points satisfied by the function and another matrix for the points satisfied by the derivative.
The degree of the answer polynomial is always one less than the total number of equations for both the function and its derivative.
www.math.hawaii.edu /lab/241/utilities.html   (0 words)

  
 CAS: Utility Functions: From Risk Theory to Finance
This article is a self-contained survey of utility functions and some of their applications.
Throughout the paper the theory is illustrated by three examples: exponential utility functions, power utility functions of the first kind (such as quadratic utility functions), and power utility functions of the second kind (such as the logarithmic utility function).
The postulate of equivalent expected utility can be used to replace a random gain by a fixed amount and to determine a fair premium for claims to be insured, even if the insurer’s wealth without the new contract is a random variable itself.
www.casact.org /dare/index.cfm?fuseaction=view&abstrID=5547   (259 words)

  
 zlib general purpose compression library version 1.1.4
Upon return of this function, strm-> adler is set to the Adler32 value of the dictionary ; the decompressor may later use this value to determine which dictionary has been used by the compressor.
This function is equivalent to deflateEnd followed by deflateInit, but does not free and reallocate all the internal compression state.
This function is equivalent to inflateEnd followed by inflateInit, but does not free and reallocate all the internal decompression state.
www.zlib.net /manual.html   (4908 words)

  
 Windows PowerShell : DateTime Utility Functions
Windows PowerShell makes this easy to do but it can be a bit verbose and I do it a lot so I've added a function to my profile: IsToday.
That is great but sometimes you want to know Recent things not just the things that happened today.
Note that this doesn't deal with the case of providing dates in the future - that isn't something I do much but if you do, this function won't help you.
blogs.msdn.com /powershell/archive/2006/09/06/DateTime_Utility_Functions.aspx   (517 words)

  
 String Utility Functions
function but safer, since it calculates the maximum space required and allocates memory to hold the result.
This function should be used only on strings that are known to be in encodings where the bytes corresponding to ASCII letters always represent themselves.
Note that this function works on bytes not characters, so it can't be used to delimit UTF-8 strings for anything but ASCII characters.
library.gnome.org /devel/glib/unstable/glib-String-Utility-Functions.html   (0 words)

  
 String Utility Functions
In versions of GLib prior to 1.2.3, this function may return -1 if the output was truncated, and the truncated string may not be nul-terminated.
This function should be used only on strings that are known to be in encodings where the bytes corresponding to ASCII letters always represent themselves.
Note that this function works on bytes not characters, so it can't be used to delimit UTF-8 strings for anything but ASCII characters.
developer.gnome.org /doc/API/2.0/glib/glib-String-Utility-Functions.html   (3531 words)

  
 gemal.dk - Utility functions for extensions in toolkit
This is want I've been requesting for a long long time.
Instead of extensions developers create their own functions to load and save prefs, create URLs etc these basic functions will be included in the tookit.
There are some libraries that already provide function like this.
gemal.dk /blog/2005/11/03/utility_functions_for_extensions_in_toolkit   (155 words)

  
 Glossary of research economics
This is a measure of the curvature of the utility function.
A synonym for CRRA or isoelastic utility function.
In the Cobb-Douglass function the elasticity of substitution between capital and labor is 1 for all values of capital and labor.
www.econterms.com /econtent.html   (14590 words)

  
 String Utility Functions
This section describes a number of utility functions for creating, duplicating, and manipulating strings.
In versions of GLib prior to 1.2.3, this function may return -1 if the output was truncated, and the truncated string may not be nul-terminated.
This function is typically used when reading configuration files or other non-user input that should be locale independent.
www.gtk.org /api/2.6/glib/glib-String-Utility-Functions.html   (0 words)

  
 ABR Service for Applications with Non-linear Bandwidth Utility Functions - Cao, Zegura (ResearchIndex)
In a basic ABR service, the available network capacity is divided "fairly" amongst active connections, without regard to the utility that each application derives from the bandwidth allocation.
The goal of this paper is to improve both the global and individual utility obtained by applications using ABR, as compared to standard max-min bandwidth allocation.
Thus, the application utility functions may not continuously increase or decrease as the available bandwidth changes.
citeseer.ist.psu.edu /cao97abr.html   (413 words)

  
 String Utility Functions   (Site not responding. Last check: )
function but safer, since it calculates the maximum space required and allocates memory to hold the result.
In versions of GLib prior to 1.2.3, this function may return -1 if the output was truncated, and the truncated string may not be nul-terminated.
Note that this function works on bytes not characters, so it can't be used to delimit UTF-8 strings for anything but ASCII characters.
glib2.activeventure.biz /glib-String-Utility-Functions.html   (3303 words)

  
 Miscellaneous Utility Functions
Furthermore, this function can't be guaranteed to operate in a threadsafe way.
allocates new memory for the returned string, unlike this function which returns a pointer into the argument.
This function is deprecated and will be removed in the next major release of GLib.
www.gtk.org /api/2.6/glib/glib-Miscellaneous-Utility-Functions.html   (0 words)

  
 Useful Utility Functions in mootools | CoryHudson.com
on a function every time through a loop is going to add overhead to your code’s performance.
This comes in very handy for animations, but also for other GUI functions, such as delaying hiding a menu after navigating away.
In prototype in the PeriodicalUpdater function, there is an option called decay that lets the call frequency “decay” if the result does not change from one call to the next.
www.coryhudson.com /blog/2006/09/14/useful-utility-functions-in-mootools   (0 words)

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