User talk:Hankwang/Archive 2011-2013

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Proposed deletion of GRAPE[edit]

The article GRAPE has been proposed for deletion because of the following concern:

non-notable software marked for sources > 5 years.

While all contributions to Wikipedia are appreciated, content or articles may be deleted for any of several reasons.

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July 2012 Study of authors of health-related Wikipedia pages[edit]

Dear Author/Hankwang

My name is Nuša Farič and I am a Health Psychology MSc student at the University College London (UCL). I am currently running a quantitative study entitled Who edits health-related Wikipedia pages and why? I am interested in the editorial experience of people who edit health-related Wikipedia pages. I am interested to learn more about the authors of health-related pages on Wikipedia and what motivations they have for doing so. I am currently contacting the authors of randomly selected articles and I noticed that someone at this address recently edited an article on Nutrition. I would like to ask you a few questions about you and your experience of editing the above mentioned article and or other health-related articles. If you would like more information about the project, please visit my user page (http://commons.wikimedia.org/wiki/User:Hydra_Rain) and if interested, please reply via my talk page or e-mail me on nusa.faric.11@ucl.ac.uk. Also, others interested in the study may contact me! If I do not hear back from you I will not contact this account again. Thank you very much in advance. Hydra Rain (talk) 12:49, 14 July 2012 (UTC)[reply]

Thanks![edit]

WikiThanks

Thanks for identifying the plug-in responsible for the intextual.com/AdMedia markup issue. Now I can point people to a possible culprit. -- Gogo Dodo (talk) 22:31, 26 July 2012 (UTC)[reply]

KFC[edit]

One good source is sufficient to back up the worm found in a KFC burger claim. Having four is unnecessary, but also seems over-compensatory, making it seem as if the claim is shaky. See the KFC talk page for my response to the Poundstone issue. Farrtj (talk) 20:05, 7 December 2012 (UTC)[reply]

July 2013[edit]

Hello, I'm BracketBot. I have automatically detected that your edit to Scoville scale may have broken the syntax by modifying 1 "[]"s. If you have, don't worry, just edit the page again to fix it. If I misunderstood what happened, or if you have any questions, you can leave a message on my operator's talk page.

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Determination of Capsaicin Content and Pungency Level of Five Different Peppers Grown in Nigeria.]] New York Science Journal

Thanks, BracketBot (talk) 15:18, 28 July 2013 (UTC)[reply]

MPE graphs[edit]

Hankwang

Hello - I looked up laser class definitions and got to the Wiki page: http://en.wikipedia.org/wiki/Laser_safety. I see that you added the MPE graphs in 2007! This is not my field, but looking at the graphs I am confused or they are not correct!

Looking e.g. at: http://en.wikipedia.org/wiki/File:IEC60825_MPE_J_nm.png You have the MPE graphs for 0.25s above that for shorter times of 100microsec, etc. So that it appears to mean at say 600nm that the MPE values are approximately:

0.25s 0.9e-3 J/cm2
100microsec 2.0e-6 J/cm2
1microsec 0.8e-7 J/cm2

BUT surely that is the wrong way round? For longer pulse/exposure times the Power Density for the MPE should be smaller? Please respond and explain if I am right or wrong a.s.a.p. My Email address is [deleted] Thanks and Regards, Henry Kafeman 93.89.81.58 (talk) 12:54, 25 September 2013 (UTC)[reply]

These numbers are not power densities (W/m2) but energy densities (J/m2). For power densities, you have to divide them by the exposure time, and then you will indeed get lower values at longer exposure times. I think I also have a plot for energy densities.

I have deleted your email address above because I don't think you would like to be exposed to the spammers.

Han-Kwang (t) 13:24, 25 September 2013 (UTC)[reply]

Han-Kwang, Thank you for your very quick response and considerately removing my Email address... I got some very strange things happening trying to post the message to you! So it did not appear to work at all originally! So if I have say a 905 nm laser at 283 mW/cm2 (20mW at 3mm diameter beam when it emerges) what is the maximum exposure time for MPE? It is being pulsed at <5.4msec per pulse. So from the maximum exposure time I should then be able to work out how many pulses would equate to the MPE - Right? Thanks [User:HKafeman|HKafeman]] (talk) 13:40, 25 September 2013 (UTC)[reply]

Han-Kwang, Actually your https://en.wikipedia.org/wiki/File:IEC60825_MPE_W_s.png has W/cm2 versus Exposure time. That shows for my 283mW/cm2 at 905 nm that the MPE needs to be less than about 10 microseconds! But it has pulses of less than 5.4milliseconds (540 times as long!). This is VERY strange as the device in question is supposed to be "eye safe" and 3R classification! Am I misunderstanding something still? Thanks HKafeman (talk) 13:46, 25 September 2013 (UTC)[reply]

Han-Kwang, Sorry I just corrected the above posts to say 283mW/cm2 from 0.283mW/cm2... HKafeman (talk) 13:56, 25 September 2013 (UTC)[reply]

For W/m2 values and small beam sizes, you should divide the beam power by the maximum area of a human pupil; I think this is mentioned in the Laser safety article. I highly doubt that 20 mW (pulsed or continuous) at 905 nm is correctly classified as 3R. At this wavelength, there is no blinking reflex, but the potential for eye damage is comparable to 7 mW visible, which would be classified as 3B. I suppose that you are researching this professionally and this is a safety issue with legal implications, so you should not be relying on my opinion or Wikipedia. You should order the IEC or EN standard and confront the supplier of your laser system.

One thing: could you make your talk page additions a bit more compact? With all the empty lines (I deleted them) it tends to become a bit chaotic after a few replies back and forth.

Han-Kwang (t) 14:17, 25 September 2013 (UTC)[reply]

Han-Kwang, Thanks (I generally add lines between paragraphs to make it more readable, but this is my first foray into Wikipedia editing...). As I said this is not my field. I did some training training recently on using a laser scanner and was just trying to understand the laser classes. I will refer this to one of my colleagues who will be able to research and understand this properly. Thanks HKafeman (talk) 14:25, 25 September 2013 (UTC)[reply]

You mention that it is about a laser scanner. If that means that the beam is rapidly moving, like with a bar-code scanner, that would lower the effective beam power by quite a bit; maybe 3R is correctly classified after all. (Empty lines between paragraphs is OK, but most of your paragraphs were one-liners. ;-) ) Han-Kwang (t) 14:37, 25 September 2013 (UTC)[reply]

It is actually a 3D scanner, but I assume that the max pulse length of 5.4msec is at each scan position, so the beam must be stationary for that length of time? But it also says the minimum measurement speed is 122,000 Points/sec (which is obviously only 8.2 microseconds each! All very confusing! HKafeman (talk) 10:55, 26 September 2013 (UTC)[reply]

File:Femtosecond pulse shapes.svg listed for deletion[edit]

A file that you uploaded or altered, File:Femtosecond pulse shapes.svg, has been listed at Wikipedia:Files for deletion. Please see the discussion to see why it has been listed (you may have to search for the title of the image to find its entry). Feel free to add your opinion on the matter below the nomination. Thank you. Leyo 10:11, 5 November 2013 (UTC)[reply]

WP:PLOTPRESENT[edit]

Hello, thank you for your recent good faith contribution to Thor: The Dark World. However WP:PLOTPRESENT is not a requirement to add actors names to the plot section infact it states "If it makes the plot easier to explain". In this case, the plot is sufficiently understandable without the names. The article also includes a thorough cast section.--TriiipleThreat (talk) 12:42, 23 November 2013 (UTC)[reply]