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Topic: Work function


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In the News (Mon 23 Nov 09)

  
  Work function - Wikipedia, the free encyclopedia
The work function is the minimum energy (usually measured in electron volts) needed to remove an electron from the Fermi level in a metal to a point at infinite distance away outside the surface.
The work function is the minimum energy that must be given to an electron to liberate it from the surface of a particular metal.
In this case, as for example that of an electron escaping from the heated negatively-charged filament of a vacuum tube, the work function may be called the thermionic work function.
en.wikipedia.org /wiki/Work_function   (494 words)

  
 Real-Time Work Function Change
This decrease in the surface work function is typical for the adsorption of polar alkyl halides on metal surfaces
The work function increases between 140 and 175 K and between 240 and 280 K are indicative of C-Br bond dissociation and butadiene evolution, respectively.
Upon heating the surface, the work function increases by ~180 meV between 115 and 145 K as the C-Br bonds dissociate to form adsorbed cyclopentyl groups and bromine atoms on the surface.
www.mcallister.com /papers/bbent.html   (2288 words)

  
 Work Function; Fermi Energy or Fermi Level   (Site not responding. Last check: 2007-10-14)
The work function (WF) is the minimum amount of energy needed to remove an electron from the surface of a conductor, to a point just outside the conductor where the electron has zero kinetic energy.
Work function is usually measured in electron-volts (eV).
Hence, the work function of a material may change whenever the surface changes, such as with the addition or removal of layers on the surface, surface charging, oxidation, contamination, and the like.
www.semiconphysics.com /work-function.htm   (156 words)

  
 WORK FUNCTION AT THE TIPS OF MULTIWALLED CARBON NANOTUBES
For carbon nanotube emitters, most of the electrons are emitted from the tips of the tubes, and it is the local work function that matters to the properties of the tube field emission.
Since the lack of suitable technical method to measure the work function of carbon nanotubes, the value of work function of carbon nanotubes used in the literatures is mainly from the well-studied carbon or graphite.
Thus, it is necessary to experimentally measure the work function of carbon nanotubes.
www.eng.auburn.edu /ADC-FCT2001/ADCFCTabstract/089.htm   (298 words)

  
 Event generation and dispatch
The work function must run for a sufficiently short period (100 ms is usually short enough) so that the user of the application does not notice any delays.
The management and dispatch of work functions is separate from the passing of control from the main application context.
A single work function is registered, which does a small amount of work before returning control the the main application context.
www.nd.edu /~iraf/Public/karma/www/programmer-manual/node7.html   (2269 words)

  
 6.1 The Iterator Work Function
If the work function needs to know the number and size of the image dimensions then these parameters can be passed via the userPointer structure.
The CFITSIO iterator routine uses this information to determine what column or array to pass to the work function, and whether the array is to be input to the work function, output from the work function, or both.
The CFITSIO iterator function fills in the values of the remaining structure elements before passing it to the work function.
heasarc.gsfc.nasa.gov /docs/software/fitsio/c/c_user/node52.html   (829 words)

  
 How to Work with Function Keys
The function keys are frequently used in combination with other keys such as the CTRL key, the ALT key, and the Shift key.
If you happen to be working in a program and would like to see the Windows help screen, simply press the Windows key (the key with the Windows logo on the bottom row of keys) on your keyboard and press F1 at the same time.
Since functionality can defer, it is often good to look in the help menu of the program that you are using to find a list of the function keys and their uses.
www.aarp.org /computers-howto/Articles/a2003-03-28-functionkeys.html   (1033 words)

  
 Kelvin Probe Data
The work function with CO exposure was monitored in-situ for Pt(111) precovered with sulfur.
The initial decrease in the work function has been associated with on-top CO absorption and the subsequent increase is attributed to the population of bridge sites [1,2].
As seen in the figure the initial decrease in the work function with CO exposure is less pronounced as the sulfur pre-coverage increases.
www.mcallister.com /papers/stuve.html   (439 words)

  
 7. The CFITSIO Iterator Function
The CFITSIO iterator function then does all the work of allocating memory for the arrays, reading the input data from the FITS file, passing them to the work function, and then writing any output data back to the FITS file after the work function exits.
This is especially important when processing tabular data since the iterator function will calculate the most efficient number of rows in the table to be passed at one time to the user's work function on each iteration.
One of these parameters is a structure containing pointers to the arrays of data; the work function can perform any desired operations on these arrays and does not need to worry about how the input data were read from the file or how the output data get written back to the file.
heasarc.gsfc.nasa.gov /docs/software/fitsio/c/f_user/node61.html   (457 words)

  
 Kernel Korner - The New Work Queue Interface in the 2.6 Kernel | Linux Journal
The work queue structure is represented by struct work_struct and defined in linux/workqueue.h.
In this case, p is a pointer to a work_struct structure, function is the work queue handler and data is the lone argument the kernel passes to it on invocation.
These two functions are analogous to schedule_work() and schedule_delayed_work(), except they queue the given work into the given work queue instead of the default one.
www.linuxjournal.com /article.php?sid=6916   (2295 words)

  
 Aging & Social Work:Function   (Site not responding. Last check: 2007-10-14)
The function model incorporates three functions that social workers perform in providing services to elders.
The selector function involves screening and processing information as well as deciding which information is useful within the current context.
The effector function involves implementing the decided upon actions necessary to assist the client (Schneider and Kropf, 1992).
www.une.edu /uhc/bodywise/modules/socialwork/function.htm   (76 words)

  
 Package: w
Work functions are similar to threads in that they allow background processing to be done, but require no threading support from the Operating System.
Work functions are only executed while the application would otherwise be idle.
Only when the work function at the top of the list is unregistered will the next work function be called.
www.atnf.csiro.au /computing/software/karma/lib/w.html   (407 words)

  
 McMaster University - School of Rehabilitation Science   (Site not responding. Last check: 2007-10-14)
The Work Function Unit (WFU) is a group of researchers, clinicians and academics conducting applied research, education and consultation in the area of work and human function.
Work is defined broadly to encompass traditional paid employment, volunteering, caregiving, supported and non-traditional work.
The dimensions of work and function are examined over the lifespan of individuals' lives as they relate to life events and health.
www.fhs.mcmaster.ca /rehab/research/workfunctionunit.html   (192 words)

  
 PHP: register_shutdown_function - Manual
Since PHP 4.1, the shutdown functions are called as the part of the request so that it's possible to send the output from them.
Note: using the pcntl function in web server envoirment is considered problematic, so if you are writing a script that runs both from the command line and from the server, you should put some conditional code around that block that identifies wheater this is a command line envoirment or not.
The alternative is to use register_shutdown_function(array(and$object, 'function')) where the ampersand passes the reference and not the copy.
us2.php.net /register-shutdown-function   (2493 words)

  
 PRESS RELEASE "Avto Effect" Transforms Electron Emission Characteristics   (Site not responding. Last check: 2007-10-14)
The idea of improving the geometry of the surface to effectively change the work function of a material across the whole surface is a new development which has become possible as a result of improved techniques for precisely texturing a surface at the nanoscale level.
An important difference between the Avto Effect and earlier work is that the higher rate of emission is consistent across the whole surface of the film, so Avto Metals do not rely on field emitters such as tips or nanotubes which are difficult to fabricate and handle.
And because the reduced work functions of Avto Metals allow for thermionic emission instead of field emission, emission occurs as a result of elevated temperatures, not the application of very high voltages.
www.marketwire.com /mw/release_html_b1?release_id=90368   (627 words)

  
 work.function, Kelvin Probe, kelvin, kelvinprobe, work function, baikie, iain baikie, Photovoltage, KP Technology, uhv, ...
It is based on a vibrating capacitor and measures the work function difference, or for non-metals, the surface potential, between a conducting specimen and a vibrating tip.
The work function is an extremely sensitive indicator of surface condition and is affected by adsorbed or evaporated layers, surface reconstruction, surface charging, oxide layer imperfections, surface and bulk contamination, etc.
An auto tracking facility which is essential for repeatable measurements of the work function and surface potential.
www.specs.com /products/Kelvin-Probe/Kelvin-Probe.htm   (380 words)

  
 Affect on Work Function
You should document the types of functional limitations caused by your disability to show your need for accommodations.Here's a list of some of the limitations you may be experiencing.
For example, you may have a hard time working next to a noisy printer or in a high-traffic area.
Unexpected changes at work, such as new rules, job duties, or supervisors and co-workers, may be unusually stressful for you.
www.bipolarworld.net /job_school/js5.htm   (683 words)

  
 Lotus Domino Designer 6.5 Help - Where does this @function work? (Part 1 A -- D)
An X indicates that the @function works in that context.
A blank cell indicates that the @function does not work in that context.
An asterisk (*) indicates that there is a caveat associated with using an @function in a particular context.
www-12.lotus.com /ldd/doc/domino_notes/6.5.1/help65_designer.nsf/f4b82fbb75e942a6852566ac0037f284/0c34ef01b5046fd185256e0000499c5e?OpenDocument   (160 words)

  
 Ed at Work - JavaScript: Function Arguments
This technique is particularly useful when implementing a function that takes an arbitrary number of arguments.
This is primarily useful for recursion in anonymous functions, since there’s no function name to use.
property that indicates the number of named arguments of that function.
www.ejball.com /EdAtWork/PermaLink.aspx?guid=d2d50942-e8fb-430e-9e40-953e224abc1d   (156 words)

  
 php - why doesn't this function work? - Topic Powered by eve community
When I do a single string value, it works absolutely fine...
I have played with breaking it up into 2 functions, turning magic_quotes_gpc on in the ini, everything I can think of...
edit2: hmmm, there are a few example functions in the magicquotes link that seem to have the same functionality you're looking for, I think.
episteme.arstechnica.com /groupee/forums/a/tpc/f/6330927813/m/780009708731   (255 words)

  
 Function Pointers -> Work around -> Get your "Function Pointer" class here :) ! - GameDev.Net ...   (Site not responding. Last check: 2007-10-14)
I know I could make a couple of dispatch(...) functions with different amounts of arguments, but then I will have to remember how many arguments this Dispatcher has, and how many arguments that Dispatcher has...
I want to be able to store the functions as objects together with the functions arguments as data.
You got to remember that the function executed maybe needs to take some arguments - If you want to have a fire hotkey, that function needs to take a vector to specify in what direction to fire...
www.gamedev.net /community/forums/topic.asp?topic_id=206559   (2153 words)

  
 6.2 The Iterator Driver Function
If colnum equals 0, then the column name will be used to identify the column to be passed to the work function.
narrays - the number of columns or images that are to be passed to the work function.
After the work function returns, the iterator function writes any output columns of data or images back to the FITS files.
heasarc.gsfc.nasa.gov /docs/software/fitsio/c/c_user/node53.html   (645 words)

  
 The Work Function of Thorium   (Site not responding. Last check: 2007-10-14)
The average work functions of vacuum-deposited thorium films and of thorium foil have been measured by the Kelvin contact potential difference method, under ultra-high vacuum conditions.
A reproducible value of 3.455 ± 0.012 ev was found for the work function of the vacuum-deposited films.
In the case of the foil, the work function increased continuously with the duration of electron bombardment, eventually reaching a limiting value of 3.728 ± 0.010 ev after ninety-seven hours of bombardment.
stacks.iop.org /0370-1328/80/124   (233 words)

  
 The Work Function of Uranium   (Site not responding. Last check: 2007-10-14)
The average work functions of vacuum-deposited uranium films and of uranium foil have been measured by the Kelvin contact potential difference method, under ultra-high vacuum conditions.
A reproducible value of 3.203 ± 0.013 ev was found for the work function of the vacuum-deposited films.
In the case of the foil, the work function increased continuously and monotonically with the duration of electron bombardment, eventually reaching a limiting value of 3.080 ± 0.005 ev after about thirty-three hours' bombardment.
stacks.iop.org /0370-1328/80/116   (256 words)

  
 Re: [BuzzDev] mi::Work() function calls   (Site not responding. Last check: 2007-10-14)
if you connect to master, the machine will start to be sent commands to work and tick only when it is required.
This doesn't make sense to me, as I expected that a call to Work() generates a chunk of a stream, and that the next call to Work() should generate the next chunk of the stream of data.
this wont work by itself (you need also a.wav file wrapper i wrote, you can have this if you want) but you can clearly see how tick and work function and get an idea of where they are called.
www.plosive.net /buzz/buzzdev/96.html   (406 words)

  
 Photoelectron Spectrometer - UV - Work Function
The crossing point of the back ground and the yield line is a photoemission threshold energy, also called the work function or the ionization potential.
“In Air” means the work functions estimated from the photoelectron spectrum by using the AC-2 to test the surface in the air.
“In UHV” means the work functions of the surfaces tested in the ultra high vacuum.
www.photoelectronspectroscopy.com   (309 words)

  
 Electrons, photons, and the photo-electric effect   (Site not responding. Last check: 2007-10-14)
This energy is known as the work function (W), which depends on the metal.
If a photon has an energy at least as big as the work function, the photon energy can be transferred to the electron and the electron will have enough energy to escape from the metal.
A photon with an energy less than the work function will never be able to eject electrons.
physics.bu.edu /py106/notes/PhotoelectricEffect.html   (702 words)

  
 What to do if you suspect an employee of drinking on work time   (Site not responding. Last check: 2007-10-14)
Under the Health and Safety at Work Act 1974 you have a general duty to ensure the health, safety and welfare of your employees.
If you knowingly allow an employee under the influence of alcohol (or drugs) to work, and this places that person or other employees at risk (if they are operating machinery, for example), you are liable.
There are tell-tale signs that indicate that an employee is habitually abusing alcohol, such as frequent hangovers, poor punctuality, excessive time-off through illness, reduced productivity or motivation, disciplinary problems and customer complaints.
www.bcentral.co.uk /people/goodboss/employee-alcohol-abuse.mspx   (656 words)

  
 Getting a function to work in a layer. - CodingForums.com
I have a form in Netscape 4 that calls a Javascript Function and it works great but after I put in the it seems to ignore the onSubmit return myFunction.
Also, your function may not be in the iLayer's parent and I don't think bubbling works in Netscape (commands keep moving up the tree until they find the function).
The onClick will not work with anything I put in their as long as I am using BUT works great if I get rid of my .
www.codingforums.com /showthread.php?t=14555   (328 words)

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