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= July 8 = | |||
= January 4 = | |||
== |
== Zoomify == | ||
Is it possible to download the map that is shown via Zoomify?--] (]) 22:48, 4 January 2025 (UTC) | |||
I have several sets of speakers (mostly "2.1" systems), for various TVs, computers, radios/CD players, etc. I was wondering if it would be possible to plug all the devices in one room into the same speakers. There would be the physical problem of splicing the lines together, then issues of the devices interfering with each other, especially if more than one was on at a time. They might also have different plugs, impedance/resistance, etc. So, is this possible ? Would it only work with a physical switch to connect only one at a time ? ] (]) 01:04, 8 July 2016 (UTC) | |||
:Yes, if you google "download zoomify image" you will see various ways. ] (]) 23:44, 4 January 2025 (UTC) | |||
::Ah, of course I googled before and found that but was not successful. So I asked here.--] (]) 11:31, 5 January 2025 (UTC) | |||
:::Please mention what you've already tried before and what did not work and what happened instead (e.g. error messages). ] (]) 04:57, 6 January 2025 (UTC) | |||
::::Tried and of course also the dezoomify tool but got immediately stuck because I was not able to find an URL. Very few programming skills, none regarding HTML, that's why I ask here.--] (]) 10:46, 6 January 2025 (UTC) | |||
:{{Outdent}} | |||
:@]: | |||
:I wasn't able to download the file as it was taking forever, but URL appeared to download the files for 30+ minutes on a fast internet. Let us know if this works. <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 03:19, 8 January 2025 (UTC) | |||
::I've successfully taken images off the ] via their source code and dezoomify, but I'm puzzled as to how to extract images here, as Dezoomify appears to be perpetually stuck on 'preparing tiles load'. The longest I've seen it take for large images in the past is a couple of minutes. Like Antemister, I've little programming knowledge, but I think the following elements in the code are related: | |||
::<code> | |||
::<!--Zoomify--><script type="text/javascript" src="ZoomifyImageViewerFree-min.js"></script> | |||
::<!--Zoomify--><script type="text/javascript"> Z.showImage("myContainer", "images/France_LD"); </script> | |||
::</code> | |||
::On going to http://cartesmich.free.fr/images/France_LD/ I get ]. Perhaps this website is savvy about theft of its most high-resolution public domain images. Maybe someone has the patience to hunt about in the browser console. ''']]''' 04:51, 8 January 2025 (UTC) | |||
::: If they're public domain images, it's not "theft". Please avoid such misleading and perjorative language. <span class="vcard"><span class="fn">]</span> (<span class="nickname">Pigsonthewing</span>); ]; ]</span> 10:52, 8 January 2025 (UTC) | |||
::::It's still potentially in violation of their ToS (not that I much care) and could, per my reading of my law (assuming this is an american website, which it isn't) run afoul of something like the Computer Fraud and Abuse Act. | |||
::::<br> | |||
::::The ToS is a reasonable concern, which is why I said theft. ''']]''' 15:53, 8 January 2025 (UTC) | |||
:::::Even if all you say were true (It's highly doubtful; there appear to be no published terms of service - much less any that a user agrees to before viewing the site; and in any case we are not all in the USA), it's ''still'' not theft. <span class="vcard"><span class="fn">]</span> (<span class="nickname">Pigsonthewing</span>); ]; ]</span> 16:11, 8 January 2025 (UTC) | |||
::::::You're right--there are no terms (though the host website, free.fr, appears to have a TOS page). ''']]''' 16:53, 8 January 2025 (UTC) | |||
Yes, I came to that cited code, but had no idea to open that container | |||
Also tried again dezoomify, and also waited a long time, and after 1-2 hours i get an error message. And it includes a link, , if you alter the numbers you can find various tiles of the map.is it possible to proceed with that, download that folder?--] (]) 22:34, 8 January 2025 (UTC) | |||
:Hmm! So I pasted this conversation into ChatGPT, and told it to generate code for use in Google Colab. The code is (it doesn't really do what it's supposed to, at all, but a start). | |||
:Hang on you want to connect several devices into ONE set of speakers or into SEVERAL sets of speakers all at once? ] (]) 04:46, 8 July 2016 (UTC) | |||
:The really screwed-up image it generated is . Hopefully these are of help to someone with more Python experience than I.''']]''' 02:35, 9 January 2025 (UTC) | |||
{{od}} | |||
::Sorry after reading it multiple times I think I got it. You want to get rid of several sets of speakers and just use one set for everything. Yes this will work, but does depend on several things. Whether you get ground loops happening with all the equipment running straight into your speakers would be my biggest concern. The "real" solution is to get a mixer, which I don't think there's really any super cheap option, starting at about . ] (]) 04:59, 8 July 2016 (UTC) | |||
I gave this another try. This time it was able to actually download the image correctly, but only a horizontal section. The code is collapsed below. I think it needs only some slight tweaking. | |||
{{collapse top}} | |||
:::Thanks. Would I then need to manually select which channel(s) I want to hear, or would it be smart enough to only select the channel(s) with a real signal (as opposed to static) ? ] (]) 16:08, 8 July 2016 (UTC) | |||
<nowiki> import os | |||
::::You would need to do it manually, unfortunately, it's a very steep step into "pro audio" territory. You need something like a gated ], but i don't think there's such a thing as a consumer version of such a device so you probably won't find a cheap one. Ideally, you would have an ], if you keep an eye out, you might be able to find a cheap 2nd hand one, if you are lucky maybe you'll find one where the "video" part is broken and just use it for the "audio" part? I've had a quick look at a classified website and there's loads for $50. Mind you they're pretty huge so if you are short on space it's probably not the best solution either... ] (]) 00:00, 11 July 2016 (UTC) | |||
::import requests | |||
::from PIL import Image | |||
::# Base URL and directory setup | |||
::BASE_URL = "http://cartesmich.free.fr/images/France_LD/TileGroup8/" | |||
::OUTPUT_DIR = "tiles" | |||
::MERGED_IMAGE = "merged_image.jpg" | |||
::# Ensure the output directory exists | |||
::os.makedirs(OUTPUT_DIR, exist_ok=True) | |||
::# Function to download a tile | |||
::def download_tile(url, save_path): | |||
:: response = requests.get(url) | |||
:: if response.status_code == 200: | |||
:: with open(save_path, "wb") as f: | |||
:: f.write(response.content) | |||
:: return True | |||
:: return False | |||
::# Function to stitch the tiles together | |||
::def stitch_tiles(tiles, tile_size): | |||
:: max_x = max(x for x, y in tiles.keys()) + 1 | |||
:: max_y = max(y for x, y in tiles.keys()) + 1 | |||
:: # Create a blank canvas for the final image | |||
:: merged_image = Image.new("RGB", (max_x * tile_size, max_y * tile_size)) | |||
:: # Paste tiles onto the canvas | |||
:: for (x, y), tile_path in tiles.items(): | |||
:: tile_image = Image.open(tile_path) | |||
:: merged_image.paste(tile_image, (x * tile_size, y * tile_size)) | |||
:: return merged_image | |||
::# Set parameters for downloading tiles | |||
::tile_size = 256 # Assume each tile is 256x256 | |||
::x_range = range(36, 50) # Adjust based on your needs (x-coordinate range) | |||
::y_range = range(24, 40) # Adjust based on your needs (y-coordinate range) | |||
::# Dictionary to store downloaded tile paths | |||
::downloaded_tiles = {} | |||
::# Download tiles | |||
::for x in x_range: | |||
:: for y in y_range: | |||
:: tile_url = f"{BASE_URL}6-{x}-{y}.jpg" | |||
:: tile_path = os.path.join(OUTPUT_DIR, f"6-{x}-{y}.jpg") | |||
:: if download_tile(tile_url, tile_path): | |||
:: downloaded_tiles = tile_path | |||
:: print(f"Downloaded: {tile_url}") | |||
:: else: | |||
:: print(f"Tile not found: {tile_url}") | |||
::# Stitch the tiles into a single image | |||
::if downloaded_tiles: | |||
:: merged_image = stitch_tiles(downloaded_tiles, tile_size) | |||
:: merged_image.save(MERGED_IMAGE) | |||
:: print(f"Merged image saved as {MERGED_IMAGE}") | |||
::else: | |||
:: print("No tiles were downloaded!") </nowiki> | |||
{{collapse bottom}} | |||
:::::Thanks. I was just wondering if there was a way to simplify my life and combine all these speakers into one. These days flat screen TVs and computer monitors all have built-in sound that totally sucks, so now I have a plethora of these 2.1 speaker systems, one for each device. That gives me decent sound, but the clutter is bad. ] (]) 03:17, 11 July 2016 (UTC) | |||
-- ''']]''' 16:09, 9 January 2025 (UTC) | |||
== How do I print the ] symbol, "x bar", in Microsoft Word? == | |||
:Oh, again some progress! What horizontal slide? Maybe iterate through the TileGroup folders?--] (]) 16:56, 9 January 2025 (UTC) | |||
The symbol for the arithmetic mean is called "x bar", which is the letter "x", italicized (I believe), with a bar over the "x". You can see it in this article: ]. My question is how do I get that symbol to print in Word? I looked through all of their symbols on the "Insert" tab. They have a million odd symbols, but I can't find this one anywhere. Thanks. ] (]) 03:22, 8 July 2016 (UTC) | |||
:], it was one of the bottom sections of the map, I have some silly ] on my devices and can't access the one I ran it on for a couple of hours. You should be able to run the above code in Colab and ask ChatGPT (or Gemini) for further help. ''']]''' 17:02, 9 January 2025 (UTC) | |||
::First heard about Colab but tried, and it seems the Code does something. What is the Folder you got the files downlaoded?--] (]) 17:30, 9 January 2025 (UTC) | |||
{{od}} | |||
: This is the symbol: <math>\bar{x}</math> (read <math>x</math> ''bar''). ] (]) 03:24, 8 July 2016 (UTC) | |||
] In a new cell, type <code> | |||
::First, start the equation using Insert Equation. Then type the "x", select it, and in the Equation ribbon, select accents, and choose the bar. This instruction comes to you courtesy of Googling "type x-bar in Word".--]|] 06:36, 8 July 2016 (UTC) | |||
from google.colab import files | |||
files.download('merged_image.jpg')</code> Apologies for putting all of this inside a hat template, I can't figure out how to correct it. ''']]''' 18:15, 9 January 2025 (UTC) | |||
:Again progress, have gotten such a merged image that shows a part of the map. The iteration is just a guess... Shouldnt there be a possibility to list all the files in the folder?--] (]) 22:58, 9 January 2025 (UTC) | |||
::@], I very nearly got it to work, the final image is 12,000x12,000px but has errors. import os | |||
::import requests | |||
::from PIL import Image | |||
::from concurrent.futures import ThreadPoolExecutor | |||
::# Base URL and output setup | |||
::BASE_URL = "http://cartesmich.free.fr/images/France_LD/" | |||
::OUTPUT_DIR = "tiles" | |||
::MERGED_IMAGE = "merged_image.jpg" | |||
::# Ensure output directory exists | |||
::os.makedirs(OUTPUT_DIR, exist_ok=True) | |||
::# Function to download a tile | |||
::def download_tile(group, x, y): | |||
::url = f"{BASE_URL}TileGroup{group}/6-{x}-{y}.jpg" | |||
::save_path = os.path.join(OUTPUT_DIR, f"TileGroup{group}_6-{x}-{y}.jpg") | |||
::try: | |||
::response = requests.get(url, timeout=10) | |||
::if response.status_code == 200: | |||
::with open(save_path, "wb") as f: | |||
::f.write(response.content) | |||
::print(f"Downloaded: {url}") | |||
::return (group, x, y, save_path) | |||
::else: | |||
::print(f"Tile not found: {url}") | |||
::except Exception as e: | |||
::print(f"Error downloading {url}: {e}") | |||
::return None | |||
::# Function to download all tiles (no detection, brute force) | |||
::def download_all_tiles(groups, x_range, y_range): | |||
::tiles = | |||
::print("Starting brute force tile download...") | |||
::with ThreadPoolExecutor(max_workers=10) as executor: | |||
::futures = | |||
::for group in groups: | |||
::for x in x_range: | |||
::for y in y_range: | |||
::futures.append(executor.submit(download_tile, group, x, y)) | |||
::for future in futures: | |||
::result = future.result() | |||
::if result: | |||
::tiles.append(result) | |||
::return tiles | |||
::# Function to stitch tiles together | |||
::def stitch_tiles(tiles, tile_size): | |||
::if not tiles: | |||
::print("No tiles to stitch.") | |||
::return None | |||
::# Determine the range of x and y coordinates | |||
::all_coords = | |||
::min_x = min(x for x, y in all_coords) | |||
::max_x = max(x for x, y in all_coords) | |||
::min_y = min(y for x, y in all_coords) | |||
::max_y = max(y for x, y in all_coords) | |||
::# Create a blank canvas for the final image | |||
::width = (max_x - min_x + 1) * tile_size | |||
::height = (max_y - min_y + 1) * tile_size | |||
::merged_image = Image.new("RGB", (width, height)) | |||
::# Paste tiles onto the canvas | |||
::for group, x, y, tile_path in tiles: | |||
::tile_image = Image.open(tile_path) | |||
::merged_image.paste( | |||
::tile_image, ((x - min_x) * tile_size, (y - min_y) * tile_size) | |||
::) | |||
::return merged_image | |||
::# Main script execution | |||
::tile_size = 256 # Assume each tile is 256x256 | |||
::groups = range(0, 16) # TileGroup0 to TileGroup15 | |||
::x_range = range(0, 50) # x-coordinates: 0–49 | |||
::y_range = range(0, 50) # y-coordinates: 0–49 | |||
::tiles = download_all_tiles(groups, x_range, y_range) | |||
::# Stitch the tiles into a single image | |||
::if tiles: | |||
::merged_image = stitch_tiles(tiles, tile_size) | |||
::if merged_image: | |||
::merged_image.save(MERGED_IMAGE) | |||
::print(f"Merged image saved as {MERGED_IMAGE}") | |||
::else: | |||
::print("No tiles were downloaded!") ''']]''' 03:31, 11 January 2025 (UTC) | |||
:::Here's the link. https://limewire.com/d/50995585-f881-4ff5-9186-e0eb55978a5e#Tcw-4kZBQKVH0GS9yZPb-vUvH8t-V04gV-t8MQp8O7k ''']]''' 03:38, 11 January 2025 (UTC) | |||
::::Thank you, that is sufficient, what I need is the ceasefire/demarcation line. Can you sent me the code with correct formatting? Maybe I can use it in future, to download other zoomified images.--] (]) 14:18, 11 January 2025 (UTC) | |||
:::::Here you are: https://pastebin.com/gPKrd1cj ''']]''' 18:04, 11 January 2025 (UTC) | |||
::: Thanks. But, I don't want an equation. I just want the symbol. Is it not available as a regular symbol, like the dozens of others? ] (]) 07:57, 8 July 2016 (UTC) | |||
:::: They have millions of symbols that I am sure no one ever uses. But they don't have a relatively commonplace symbol like the x-bar? ] (]) 08:01, 8 July 2016 (UTC) | |||
:{{ping|Joseph A. Spadaro}} There are actually two parts in that question; one, how does ] provide a symbol for x̄, and two, how does one write it in MS Word. | |||
:Going by (which includes a detailed procedure in Word at the end) there is no single-symbol "x bar" in standard Unicode, but some fonts accept diacritics so that you can effectively get what you want with "an x, with a bar over it". You will need to make sure the font supports it, and you will need to find the diacritic, but it works. ]<sup>]</sup> 09:11, 8 July 2016 (UTC) | |||
= January 13 = | |||
::{{ping|Joseph A. Spadaro|Tigraan}} Possibly the Unicode U+0305, called a 'combining overline' is what you need; see ]. --] (]) 09:24, 8 July 2016 (UTC) | |||
== Absolute value inequality == | |||
:: In MacOS with the Extended keyboard setting, option-shift-a (after the base letter) makes U+0304 COMBINING MACRON: x̄. —] (]) 09:27, 8 July 2016 (UTC) | |||
A meteorite is 600ft from a satellite and travelling toward the satellite at 42ft/sec. At what times will the meteorite be less than 50ft away from the satellite? Write an appropriate absolute value inequality for the given situation and solve: | |||
:Doesn't Word have the option to add an overbar in character format? So, you type an italic x and add an overbar. Done. ] (]) 14:49, 8 July 2016 (UTC) | |||
Let|42t-600|<50 and 42t-600<50 and 42t-600>-50. Thus, 13.10<t<15.48. ] (]) 22:21, 13 January 2025 (UTC) | |||
:What is the question? | |||
Thanks. Let me change my question. When I look at the symbols available in the Word "Inserts" tab. they have hundreds upon hundreds of extremely esoteric symbols. (Many of which are odd and bizarre. Many of which are useless, like "cute" little drawings.) Stuff that I am sure no one ever uses. Why would they not have a relatively "common" symbol, such as the x-bar? Thanks. ] (]) 17:57, 8 July 2016 (UTC) | |||
:The given data do not specify where the meteorite is at time {{nowrap|1=t = 0}}, and also not with which speed the satellite is moving. Your solution is based on the (not unreasonable) assumptions that the person who drew up this assignment meant {{nowrap|1=t = 0}} to be the initial moment when the meteorite is 600ft away from the satellite, and that the speed of 42ft/s is the speed of the meteorite relative to the satellite. Your solution assumes that the meteorite will not hit the satellite, but pass by it. Under these assumptions, the derived inequations are correct, as is your solution, although not with exact values but with numeric values rounded to two decimals. | |||
:You'd have to ask the ] about that. Presumably, x bar isn't included because it can be created by combining two pre-existing symbols as shown above. ]<sub>(])</sub> 18:56, 8 July 2016 (UTC) | |||
:If the meteorite hits the satellite, we don't know what happens after {{nowrap|1=t = 14.29}}. If the satellite disintegrates, the notion of the distance between the bodies becomes meaningless. --] 23:59, 13 January 2025 (UTC) | |||
::If you ask for <math>\bar{x}</math>, other people will ask for <math>\bar{y}</math>, <math>\bar{M}</math>, <math>\bar{\theta}</math>, etc... Mathematically, it is more appropriate to think of the bar as a modifier of whatever variable you have, whether it's called <math>x</math> or anything else. --] (]) 20:01, 8 July 2016 (UTC) | |||
:] '''Please ].''' | |||
:Welcome to {{#ifeq:{{BASEPAGENAME}}|Help desk|]|{{#ifeq:{{BASEPAGENAME}}|Reference desk|]|Misplaced Pages}}}}. Your question appears to be a homework question. I apologize if this is a misinterpretation, but it is ] not to do people's homework for them, but to merely aid them in doing it themselves. Letting someone else do your homework does not help you learn nearly as much as doing it yourself. Please attempt to solve the problem or answer the question yourself first. If you need help with a specific part of your homework, feel free to tell us where you are stuck and ask for help. If you need help grasping the concept of a problem, by all means let us know.<!--Template:Dyoh--> | |||
:This is additionally the Reference desk for computing and electronics-related topics, not mathematics. --] (]) 06:11, 15 January 2025 (UTC) | |||
::But is it homework? Homework formulates an exercise, often in the form of a problem, asking for its solution. It is not usual for homework to contain the detailed solution to a stated problem. What is then the exercise? --] 10:32, 15 January 2025 (UTC) | |||
:::Maybe they forgot the rest of the problem? Or maybe it's just someone/somebot sloppily copy-pasting stuff from the Web to try and waste people's time. --] (]) 05:18, 16 January 2025 (UTC) | |||
::::I think it's not homework. They might be sending stuff into space. ] (]) 12:22, 16 January 2025 (UTC) | |||
:::::📐 ] (]) 21:31, 17 January 2025 (UTC) | |||
::::📐 ] (]) 21:33, 17 January 2025 (UTC) | |||
:::📐 ] (]) 21:35, 17 January 2025 (UTC) | |||
::The inequality problem was not school homework. I apologize for the mix-up. I was only checking my answer. ] (]) 21:40, 17 January 2025 (UTC) | |||
:::Yeah, thank me for saving you. Someone got confused. 🪐🛰 ] (]) 09:43, 18 January 2025 (UTC) | |||
= January 15 = | |||
::: That could be said of many other symbols they already do include. ] (]) 20:13, 8 July 2016 (UTC) | |||
== What is this character? == | |||
:::: You may want to read ]. Basically, combining characters are preferred since they are much more flexible (you can put a COMBINING OVERLINE character on almost any other character, while with precomposed characters you're limited to what's available). But some older software has trouble handling combining characters correctly, so they added some precomposed characters for what they considered to be common cases. x-bar apparently wasn't one of those cases. ] (]) 00:06, 9 July 2016 (UTC) | |||
] has several characters that my computer renders as little boxes. For example: | |||
::::: Correct. And it wasn't just "what they considered to be common cases"; in general they included characters (that is, single-point or "precomposed" characters) only if they had already been included in ome ''other'' notable character set. (That is, they didn't trust their own judgement; they applied something similar to Misplaced Pages's ] policy.) —] (]) 15:59, 9 July 2016 (UTC) | |||
*''a'' <⃥͏ ''a'' (]) — '''after the first italic a''' | |||
* if ''a'' < ''b'', then ''b'' <⃥͏ ''a'' (]) — '''after the second italic b''' | |||
What are they? In both cases that I copied, the box is seemingly the same character as the lesser-than sign, since I can't highlight one without the other. I figured I could get the answer from Google (there are enough Unicode charts online), but I get just four results for the combined lesser-than-and-box: the inequality article, two Reddit pages, and something in Thai. When I put the combined lesser-than-and-box into the URL, I'm shown ], which makes sense for a title containing a standalone < character, but not for one where the < elements are part of a special character. ] (]) 20:29, 15 January 2025 (UTC) | |||
: A less-than with two combining codes: | |||
Thanks, all. ] (]) 04:28, 9 July 2016 (UTC) | |||
index chr codepoint utf8 cat name | |||
0 < U+003c 3c Sm LESS-THAN SIGN | |||
1 ⃥ U+20e5 e283a5 Mn COMBINING REVERSE SOLIDUS OVERLAY | |||
2 ͏ U+034f cd8f Mn COMBINING GRAPHEME JOINER | |||
: -- ]'''··–·'''] 22:56, 15 January 2025 (UTC) | |||
== Looking for a pointer == | |||
::In other words, it's a "not less than" sign. Unicode's single character for that is hex 226E or ≮, although it uses a slash rather than a backslash ("reverse solidus") to overstrike the < sign. --] (]) 02:47, 16 January 2025 (UTC) | |||
On Windows 7 (64-bit) every time I leave the PC for a while the mouse pointer disappears. Wiggling the mouse doesn't bring it back, but CTRL-ALT-DEL does, and it remains after I hit the Cancel button. What causes this and how do I stop it ? Note that it doesn't appear to have gone into sleep/hibernate mode, as the original screen is still displayed (not a screen saver). ] (]) 18:03, 8 July 2016 (UTC) | |||
:::Latex also uses <math>\,\nless\,.</math> The use of a forward slash, as in <math>\,a\!\not{\!\text{R}}~b\,,</math> to mean <math>\neg(a~\text{R}~b),</math> is standard. I can't think of a reason for using the backslashed symbol <math>\,<\!\!\!\!\!\setminus~</math> instead and have replaced <\ by ≮. --] 09:27, 16 January 2025 (UTC) | |||
:<small>Have you done virus checking firstly? -- ] (]) 18:10, 8 July 2016 (UTC)</small> | |||
= January 16 = | |||
:The physical interface is acting as if the screen locked. I have seen screensavers fail such that the screen locks, but the display doesn't change. So, you have to blindly unlock the screen - which can be difficult if you have to ctrl-alt-del and then type a password. ] (]) 18:21, 8 July 2016 (UTC) | |||
== |
== Miraheze Stuff == | ||
] What should I do if my wiki is approved on Miraheze? ] (]) 12:21, 16 January 2025 (UTC) | |||
# What brand is highly praised? | |||
# Do they come with Lithum ION battery (or something better) like the Laptops? Does a UPS protect itself from ‘electric over powering’ the battery, like the Laptops which consist of circuts to mitigate over powering the battery…? | |||
] (]) 18:08, 8 July 2016 (UTC) | |||
:That should depend on the scope and goals of the wiki you have requested, which we don't know. Do you already have a small team of dedicated volunteers who will supply a non-trivial amount of relevant content? An empty wiki is not conducive to attracting new contributors. --] 23:56, 16 January 2025 (UTC) | |||
:It isn't a brand thing. I assume all brands make good and bad products. I have an APC 1500. It has been great. I also have an APC 650. It is crap. The output is so flaky that it sends my computer into power fault every few hours. So, I stopped using it. They do have circuits to stop charging the battery when it is fully charged. That should be obvious. Otherwise, a UPS would be pointless because you'd have to unplug it when charged and, somehow, plug it back in very quickly just before power goes out. ] (]) 18:28, 8 July 2016 (UTC) | |||
: |
:Does it have to do with ]? --] 00:12, 17 January 2025 (UTC) | ||
:: |
::No, my friend in interested in YBS. It's not me. He told me from a distant place that he wants a wiki. And I have another wiki personally on my kernel. ] (]) 12:55, 17 January 2025 (UTC) | ||
== |
== Temp Files on C: Drive == | ||
Is it possible for memory storage, either magnetic or flash, without sector sizes or block sizes to exist? I am imagining an EEPROM that has no blocks. Would the construction of such be more difficult. — ] ] | |||
I have a Dell Inspiron 3910 running Windows 11. It has a C: drive with what is shown as either 216 GB or 232,783,867,904 bytes. (So those are 216 binary gigabytes, of 2**30 bytes each.) Anyway, This PC usually shows that it has between 20 GB and 45 GB free. If the free storage becomes less than 10%, it displays a red bar in This PC. One parameter that I am familiar with that changes is the size of pagefile.sys, which starts as 12 GB and often increases as it runs up to 24 GB or even 28 GB. I sometimes see the free storage on the C: drive drop to as low as 16 GB, which doesn't bother me, even if it bothers This PC. I don't need unlimited free storage on my C: drive; I need enough free storage on my C: drive. What happened yesterday is that it began displaying that about 5.5 GB was free, much less than I have seen before. I hadn't done anything that should have filled up the C: drive, such as importing video clips from my phone. (I know that video clips are large because they are three-dimensional because time is the third dimension.) I found a few folders on my C: drive that were at least 1 GB and I wasn't using, and I moved them to the E: drive, which is a great monster of a 4TB solid-state device. I thought that might free up a few gigabytes, and it didn't change anything. At about this point Windows Update told me that operating system updates were ready to install, and so I needed to schedule a time for a system restart. After the restart, my C: drive shows as having 44.9 GB free. That is, approximately 39 GB was reclaimed during the restart. I know that approximately 10 GB of that was pagefile.sys. Where did it get more than 25GB of free disk storage from? Is there a way that I can free up this disk storage other than by a restart? I know that some of this was temporary files created by Google Chrome and Microsoft Edge and a few other standard programs. Is there a utility that I can use that frees up temporary storage without restarting Windows? | |||
:Read the ] article. NOR flash is byte-addressable. However NAND is cheaper and can achieve greater density, so it's typically used, unless the characteristics of NOR flash are needed. As for ]s (which usually aren't referred to as "memory"), blocks are used in modern drives because the drive calculates and stores ECC for each block. This is a consequence of cramming data into such small areas. The signal is very weak, and read errors are a frequent occurrence. --] (]) 23:39, 8 July 2016 (UTC) | |||
] (]) 18:10, 16 January 2025 (UTC) | |||
:@] I don't know of any program that finds temp files, but a good guideline I have in general is to use something like WinDirStat or WizTree (preferably the latter), as both show a graphical display of the biggest files on your drive, and may help in this case. <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 21:44, 16 January 2025 (UTC) | |||
::All NOR flash I've seen was divided into blocks just like SD cards are divided into sectors. The connection between "modern drives" using "blocks" instead of sectors due to ECC is dubious because other storage that uses "blocks" has no ECC (I haven't seen a hard drive that uses blocks, anyway). — ] ] 20:00, 9 July 2016 (UTC) | |||
::Thank you, ]. I had already been using Disk Space Analyzer Max, which showed me the directories that were using a lot of space, and that didn't help much. What I saw was that Google Chrome had a large amount of data, for instance, but I didn't know what Google Chrome data was useful to it and what was temporary. As I said, I tried moving a few directories, each of which was about 1 GB, from C: to tertiary storage, and that didn't help. I thought it would make about 3 GB free, but maybe it took Windows a while to catch on. Obviously the restart found and freed up a lot of storage. So I am asking whether there is some way other than restarting the system to get it to find and free up the storage. Maybe I am looking for something that either does not exist or is buried somewhere, like treasure. ] (]) 22:19, 16 January 2025 (UTC) | |||
:::If it's Google Chrome that's the culprit, have you tried clearing your cache and browsing history? For me, caching and history have led to many GiBs being used in Chrome in the past. <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 23:07, 16 January 2025 (UTC) | |||
::::Whoops forgot ping @] <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 03:01, 17 January 2025 (UTC) | |||
::::Thank you, ] - That is useful advice. If I see that Google Chrome is using a lot of SSD space, I will purge its cache and browsing history. I assume that advice also applies to any other web browser. More generally, I infer that if any application is using a lot of temporary space, it can be nuked if there is an option in the application to nuke the temp storage, and, if not, it can always be restarted. Apparently a lot of applications clean up their own litter boxes when they start up. In this respect they are unlike cats. ] (]) 17:25, 17 January 2025 (UTC) | |||
:Install (free), boom, gives you an overview of everything stored on your storage volumes. Also lets you manage said stuff. | |||
:Anything called "]" or "temp" can be safely nuked. A cache is just copies of things stored for speeding things up and can always be regenerated. In fact I suggest just making your browser shut off disk caching, which is largely unneeded these days unless you're on a slow connection, and eats away at the lifetime of ]s, which it sounds like your primary drive is. Web search "<name of browser> disable disk caching" | |||
:{{tpq|So I am asking whether there is some way other than restarting the system to get it to find and free up the storage.}} It's hard to give a useful general answer to this without knowing what is taking up said storage to begin with. Remember we're not there with you looking at your computer screen; we can't see what's on your drives. The most generic answer is "sure there is as long as the things taking up space aren't locked Windows system files, which require a restart in order to modify/delete them." Software can always be configured to run periodically to go through deleting stuff "in the background". | |||
:For one you mentioned ]—the Windows ], which you probably have Windows "managing" the size of on its own (the default). Windows likes to be generous with its size and reserve more than you probably need, which then sits there taking up space. If you have no plans to use ], on a typical modern PC you can usually get away with just disabling it altogether, though you might want to leave a bit of margin and set it to half your RAM size. For this Web search: "Windows change page file size". --] (]) 04:12, 17 January 2025 (UTC) | |||
:::Thank you, ]. I have a disk analyzer, but will also try the one you recommend, and see which one gives me more what I want. When you say that you infer that my primary drive is an ], I think that you mean that my secondary storage is an , because my primary storage is my 12 GB of RAM, and my secondary storage on the C: is a 216 GB SSD, which is what was getting full. ] (]) 17:25, 17 January 2025 (UTC) | |||
::::Yeah. In computer-ese "storage", unqualified, is usually referring to ], stuff that keeps what's there without needing continual power, which excludes "]". And 12 GB is definitely a healthy amount; unless you're doing intensive things like ] design or playing graphics-intense 3D video games, you can get away with just disabling the page file entirely if you want. ] (]) 01:30, 18 January 2025 (UTC) | |||
:::::Yeah, I was about to ask how they use their computer with just 12 GB RAM. For web browsing/emails, that's more than enough. <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 02:09, 18 January 2025 (UTC) | |||
== install a specific version of OSX == | |||
:::Maybe I'm missing something, but I don't see where it was claimed hard drives use blocks instead of sectors. The claim seem to be that hard drives are in blocks or sectors instead of being single byte addressable. Sector is arguably the better term to use for the physical chunks on hard drives since blocks often refers to the chunks used by the file system, ] . Still I don't know if you can say the usage is explicitly wrong. After all, consider ] and ]. (Although as ] shows, LBAs and presented sector sizes don't have to correspond to physical sector sizes. And nowadays we have the ] hard drives to complicate things even more when you consider writing.) ] (]) 13:39, 11 July 2016 (UTC) | |||
Hi. I am trying to replicate the steps described here: https://stackoverflow.com/questions/71241711/is-there-a-way-to-access-your-own-airtag-data-via-api | |||
:There are implementations that do not use addressable memory. I worked on a system that used track memory. A large rotating drum had a spiraling track that went from one end to the other. When a signal arrived, it was placed on the track at the current location of the head. If there wasn't an incoming signal, the head would read whatever track information was written and send it out as a repeating signal. It was, in effect, a repeating analog buffer - but it was memory and it wasn't broken into blocks or sectors or bits or addresses. It had a good use in that one particular case, but is rather useless for a modern computer. The argument to make is where the concept of "memory storage" ends. Is it memory storage if you are recording analog signals? Does it have to be binary? Is an old vinyl record memory storage? ] (]) 12:27, 11 July 2016 (UTC) | |||
The instructions specify: "You need macOS 14.3.1 or earlier for this to work. Items.data is encrypted in 14.4 and later." | |||
= July 9 = | |||
I currently do not have any Apple hardware, so I plan to purchase a "mac mini, m1, 2020" machine. After I receive the machine, I plan to factory reset it for security. | |||
== I²C over COM port == | |||
After a factory reset, is it possible to install a specific version, such as 14.3.1 onto the machine? | |||
hello, does someone by chance know of a program or a library that can bitbang the I²C protocol over an RS-232 port (or, rather, an FTDI style breakout board with TTL levels), for communicating with I²C devices, preferably under Linux? I'm aware of the electrical differences between I²C and TTL ] (]) 04:29, 9 July 2016 (UTC) | |||
:Our ] article has some suitable source code. ] (]) 08:39, 9 July 2016 (UTC) | |||
(My understanding that if I just use the regular "system update" path, it would it me directly to the latest OSX, which is currently 15.2.) ] (]) 21:42, 16 January 2025 (UTC) | |||
==Wattage== | |||
:I would presume so. Thing is though, if you give the system Internet access it'll probably keep "trying" to update you to the latest OS X version. ] If you're already willing to spend money on the problem, why not just buy some different tracking device not from Apple that lets you talk to it however you want? What's the ultimate goal you're trying to accomplish here? --] (]) 04:22, 17 January 2025 (UTC) | |||
::Hi. Thank you for the help. | |||
::I haven't spent a dollar on this project yet, so I'm very flexible. I'm also pretty open-minded and will choose any brand or solution that fits my needs. I'm basically looking for a tracker to put in my bag so that I don't lose it. | |||
::I checked out the existing tracker networks and there's basically only two major ones: Apple AirTag and Google Find My Device. The former network is much larger than the latter, at least in 2025. The size of Apple's network (number of Apple smartphones in the wild) enables my bag to be tracked accurately, without me having to ever carry an Apple smartphone. | |||
::I'm usually not a fan of closed and propriety systems, but in this case it could take years before Google's (slightly more) open system catch up in network size unfortunately. ] (]) 17:48, 17 January 2025 (UTC) | |||
:::Along with {{ping|Slowking Man}}, I'm still very confused why you're dead set on OSX 13 and AirTags. If this is only for your personal use why does it matter how big the tracker network is? <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 18:34, 17 January 2025 (UTC) | |||
::::Solution A: If I put an airtag on my bag, then I can know where it is at all times, with 2 minute updates 24/7. (Regardless of where I physically am, or what phone I'm using.) This is because there are Apple devices blanketing the NA city that I live in, and they are willing to report the location of my bag to the Apple servers, without any payment or involvement from me. | |||
::::Solution B: If I buy a similar device from another manufacturer, let's say Google or Samsung, then their location service would report my bag as being in my house, but with minimal location updates in the future. This is because there aren't any Google or Samsung devices in my city willing to report the location of my bag to the Google/Samsung servers for free. To improve the accuracy of the location updates, I would have to maintain a Google/Samsung device near my bag, which kinda defeats the whole point. | |||
::::I hope I'm explaining it correctly. ] (]) 00:48, 18 January 2025 (UTC) | |||
:::There are plenty of options, such as ], ... You could throw in a cheapo device like a ] with a cellular module and battery. If you want to splurge, you can get something with a GPS and satellite comms connection that will work basically anywhere on Earth. | |||
:::Alternately if you think the Airtag is a good fit for your purpose why not just just get a cheap used iDevice™, if all you want is the Apple Find thing? I will point out that two things here are at odds: wanting to do things on-the-cheap, vs wanting constant real-time location updates. If you can relax one or the other that makes it a lot easier. Perhaps you don't really need 120-second interval location updates? --] (]) 01:24, 18 January 2025 (UTC) | |||
::::That said, in my observations, fast tracking is not really anything that's really the case much with Find My anymore as sometimes my device's locations will be reported as their location from 2-5 days ago with Find My refusing to update. (Note: I'm still on iOS 18.2 so it might be fixed in 18.2.1.) Even when it used to be fast, it would only ping when you opened Find My, and would not auto-update for 5-7 mins. <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 05:51, 18 January 2025 (UTC) | |||
== duplicate tab in Firefox == | |||
Is it possible to measure an L.E.D.'s actual watt using a typical Multimeter (supposing it can measure Current, apart from Voltage, both in AC and DC) ? ] (]) 05:42, 9 July 2016 (UTC) | |||
] | |||
:Not with one measurement. You need to measure the current, disconnect the multimeter, reconnect the supply, then measure the voltage. ] (]) 09:29, 9 July 2016 (UTC) | |||
:Incidentally, if you have a simple arrangement with a resistor in series with the LED, you can measure the current by measuring the voltage across the resistor, and using the equation <math>I = {V \over R}</math>. You still need to make a second measurement of the voltage across the LED, though. ] (]) 09:41, 9 July 2016 (UTC) | |||
In Firefox (on MacOS) I sometimes accidentally hit a combination of keys that makes a new tab, same as the current tab, appear at the right. Naturally I have not been able to reproduce this behavior intentionally, nor find it in a list of Firefox keyboard shortcuts. Am I dreaming? ] (]) 21:54, 16 January 2025 (UTC) | |||
::Many thanks Tevildo. If it's not taking too much advantage of your generosity, I'd beg you to be a bit more elaborate. For instance in first instruction you say "measure the current", now shall I measure it along with LED attached or LED removed from the circuit. And is it true that current is never measured like voltage (in parallel) but in series ? As for putting resistor in series with LED that ain't difficult, why not simply jump to this step ? Please tell how voltage across resistor and across LED ultimately give us wattage. Unless I am very much wrong I think current and wattage are separate things. ] (]) 17:00, 9 July 2016 (UTC) | |||
] | |||
:::No problem, it's what we're here for. I'm assuming your circuit is basically the same as the one to the right (from our ] article, with annotations). To find the power, we need to find the voltage across the LED and the current through it, and multiply them together. | |||
:::Measuring the voltage across the LED is easy: | |||
:::*Set your multimeter to "DC Volts". | |||
:::*Connect the positive lead to point B on the diagram, and the negative lead to point C. | |||
:::*The reading on the multimeter is the voltage across the LED. Let's call this <math>V_{LED}</math>. For example, it might be 3 volts. | |||
:::There are two ways to measure the current. The first is to measure it directly with the multimeter: | |||
:::*Disconnect the wire between the power source and the LED (between points A and B on the diagram). | |||
:::*Set your multimeter to "DC Amps". | |||
:::*Connect the multimeter positive lead to point A on the diagram (the supply positive output), and the negative lead to point B (the LED anode). | |||
:::*The LED should now be on. The reading on the multimeter is the current in the LED. Let's call this <math>I</math>, as in the diagram. | |||
:::The second way is to measure the voltage across the resistor. This assumes you know what its resistance is. | |||
:::*The circuit should be connected as in the diagram (with the LED on). | |||
:::*Set the multimeter to "DC Volts". | |||
:::*Connect the positive lead to point C, and the negative lead to point D. | |||
:::*The reading on the multimeter is the voltage across the resistor. Let's call this <math>V_R</math>. | |||
:::*If the resistance of the resistor is <math>R</math>, the current in the LED is <math>V_R \over R</math>. For example, if <math>R</math> is 100 ohms, and <math>V_R</math> is 2 volts, the current (<math>I</math>) is 20 mA (0.02 = 2 / 100). | |||
:::Now we know <math>V_{LED}</math> and <math>I</math>, the power of the LED (in watts) is <math>W = I \times V_{LED}</math>. Using the numbers from above, the power is 20 mA * 3 V = 60 mW. Hope this helps! ] (]) 18:08, 9 July 2016 (UTC) | |||
:I suggest you get a device like the ] meter, which does the math for you and lists the wattage directly: . ] (]) 17:08, 9 July 2016 (UTC) | |||
::This is for mains equipment, and the OP just wants to measure the power for a (DC) LED. ] (]) 18:08, 9 July 2016 (UTC) | |||
:Right click tab, select "Duplicate Tab"? <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 22:50, 16 January 2025 (UTC) | |||
:::To be more specific, if you try to measure the ]s of an ] circuit by measuring ]s and ]s separately and calculating the result, you end up with ]s, not watts. In ] circuits watts and volt-amperes are identical, so the technique works. The math is easy: volts times amperes equals watts, as Tevildo explained in detail above. --] (]) 22:09, 9 July 2016 (UTC) | |||
: {{keypress|ctrl}} and drag on the tab will duplicate it; I've done that by accident; I can't see a non-mouse way of doing it. -- ]'''··–·'''] 22:51, 16 January 2025 (UTC) | |||
Note: High power LEDs, also called compact light sources, were operated in pulse mode due more efficient power supply. The pulses may not get captured correctly by the multimeter. An oscilloscope lets you know, but note, the oscilloscope is connected to ground. Aware of shorcuts. --<span style="color:#00A000;">Hans Haase (])</span> 20:53, 12 July 2016 (UTC) | |||
: And it is not which apparently means delete page to Misplaced Pages! ] (]) 23:46, 16 January 2025 (UTC) | |||
: {{keypress|Alt}}-{{keypress|Enter}} with the address bar highlighted will open its contents in a new tab, which is often functionally a tab duplication. So maybe you wrangled a {{keypress|Ctrl}}-{{keypress|L}}, {{keypress|Alt}}-{{keypress|Enter}}? (Sorry, not exactly sure what these map to on MacOS.) ] (]) 09:08, 17 January 2025 (UTC) | |||
::::Thanks for reply, Hans. If you don't mind, I'd like to know what is meant by "connected to ground" ? And how does it disqualify an oscilloscope from correct and safe gauging. I think doesn't that simply mean that like many other electric appliances that run on A.C. mains, it has its outer metallic body attached to a ''3rd wire'' that takes back any leaked current, through a cable common to whole house or complex, back to be sunk into the ground through a conductor buried considerably deep into it ? - O.P. <!-- Template:Unsigned IP --><small class="autosigned">— Preceding ] comment added by ] (]) 04:58, 13 July 2016 (UTC)</small> <!--Autosigned by SineBot--> | |||
= January 17 = | |||
:::::Unlike a portable multimeter that has two uncommitted probes (red +ve and black -ve), oscilloscope inputs are usually coaxial with the outer (shield or screen) permanently connected to the case and ground. If the LED circuit under investigation is powered by battery or some other floating power supply there is no problem. However if the LED circuit is part of mains-powered equipment whose circuit is connected to ground, the extra route to ground through the oscilloscope may cause a damaging short circuit. Some two-channel oscilloscopes offer a differential measurement mode that overcomes this limitation. It is also possible to "float" an oscilloscope without its ground connection but that strategy is risky even in the hands of experienced professionals. ] (]) 10:58, 13 July 2016 (UTC) | |||
== Opera == | |||
== ] (and other exotic) Characters == | |||
Whenever a server sends traditional or simplified Chinese (same about some other languages also) as text, instead of occurring as they should, they rather appear to be rectangles confused from within, as shown in the picture here. Please tell me what should be done to make them occur naturally ? ] (]) 16:17, 9 July 2016 (UTC) | |||
:You will have to upgrade to an operating system with the Unicode fonts installed. You can install more fonts on your computer as well. ] (]) 22:35, 9 July 2016 (UTC) | |||
:: Thanks, Graeme Bartlett...it works ! see → 活動写真 ] | |||
Any tips or tricks recommended? ] ] 18:42, 17 January 2025 (UTC) | |||
== Airlines use of continuous stationary == | |||
:Avoid? -- Seriously, what do want to know? --] (]) 18:53, 17 January 2025 (UTC) | |||
:Isn't Opera run by a Chinese company now? <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 19:32, 17 January 2025 (UTC) | |||
::{{small|]? --] 23:36, 17 January 2025 (UTC)}} | |||
:::No, they are owned by Kunlun Tech Co., Ltd. Which should already raise privacy bells. <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 23:39, 17 January 2025 (UTC) | |||
::::Meh. So, worse comes to the worse, the Central Committee get to see my browsing history. In a few days, your government gets owned by Putin. Swings and roundabouts, komrade. ] ] 23:48, 17 January 2025 (UTC) | |||
:::::You can't say I didn't warn you. You didn't have to bring US politics into this. This is the computing reference desk, not politics. <span style="font-family:monospace; font-weight: bold"> <span style="color:ForestGreen;font-size:1.15em"> ]</span> (<span style="color:#324c80">she/they</span> {{pipe}} ]) </span> 23:53, 17 January 2025 (UTC) | |||
Why do airlines still use ] and ]? I hear them at gates, and I assume they're printing passenger lists. The only advantage I can think of is that if you're clutching a wodge of continuous paper, you know you've got it all. ] (]) 20:55, 9 July 2016 (UTC) | |||
= January 19 = | |||
:One advantage I can think of is that if the ink runs out, you still have the indentations in the paper you can read, especially if you run a pencil lead over it. But while we are on the topic, why do most retail establishments in the US still use ]s for receipts ? ] (]) 23:23, 9 July 2016 (UTC) | |||
::Great follow-up question. I hope we get some answers.] (]) 14:21, 10 July 2016 (UTC) | |||
:::One obvious factor is cost. The best technology to replace these old technologies, as far as readability, is likely a black-and-white ] (color seems like an unnecessary expense). I imagine they cost more initially (but maybe not by much, if it only prints the width of a receipt or airline ticket). However, for these high volume operations, the more important issue is what it costs per print. Can anyone provide data on this, for dot-matrix, thermal, and black-and-white laser printers ? ] (]) 15:13, 10 July 2016 (UTC) | |||
::::Also, (nearly) all laser printers are ]s, i.e. they print full pages. Dot matrix printers are ]s. If you need a permanent record immediately, a page printer will waste a full page on each transaction, even if you only need a single line. --] (]) 19:03, 10 July 2016 (UTC) | |||
:::::But is their any inherent reason why laser printers can't be designed to print smaller areas (hopefully at reduced cost) ? ] (]) 22:25, 10 July 2016 (UTC) | |||
:::::: {{U|StuRat}} You mean like a ''laser'' receipt printer? Probably far more economical to use a thermal printer. (See my answer below↓ too) If someone wanted to throw enough money at it, it is probably possible to shrink a laser printer down like that. I imagine you ''could'' write to ] with a laser, thus avoiding the use of toner? - ] ] <sup>]</sup> 05:38, 11 July 2016 (UTC) | |||
:Those are most likely ]s, not dot-matrix. --] (]) 19:32, 10 July 2016 (UTC) | |||
As to the use of thermal printers, they're very quick, but a key advantage may be that there's only one consumable (a thermal roll) rather than paper/ribbon or paper/ink or paper/toner - relatively speaking, this makes them a very much more easy to maintain than a printer which requires both. --] ] 22:34, 10 July 2016 (UTC) | |||
::::re {{U|StuRat}}s' query about ''Thermal Printers'', I agree the big advantage of thermal printers may be speed. Where I live now they use a small thermal printer on a ']' at the library to print list of book etc borrowed. I have worked a lot (in the past) with inkjet log printers, and I was surprised that in this application were practically instant, i.e you tap the touchscreen asking for a 'receipt' and ''bang'' its there. Barely get the chance to lift my finger off the screen. Agree with {{U|Tagishsimon}}, in other words. I also think it's likely they can economically be made ''very'' small, likely more so than a laser. Thermals seem to be practically universal for cash register receipts.] ] <sup>]</sup> 05:38, 11 July 2016 (UTC) | |||
:::::Re the speed of thermal receipt printers, source says up to 250 mm per second, so 10 inches/sec, 600 in/minute or ≈50 feet,(15 metres) per minute. That is pretty fast! ] ] <sup>]</sup> 05:49, 11 July 2016 (UTC) | |||
::Airlines were among the earliest ]. It's entirely possible that some of what we see today just comes from the old adage of "if it ain't broke, don't fix it". If it works and fits their requirements, (including costs of consumables and break down frequency), sometimes it would cost a lot more to "re-engineer" something to work with a newer "peripheral" so you make do with the old one, until it becomes unviable. We have these old ] fax cards called "brooktrout", they're old and obsolete but to replace the service will cost a fortune, so we just keep using them until they fail and then replace them with a different service. They might last 10 years or they might last 2 months but there's no point paying to change them over while they're still working. I'm not saying THAT is what's happening with line printers in airports, I'm just giving one example of why seemingly old obsolete computer hardware doesn't get replaced. ] (]) 03:45, 11 July 2016 (UTC) | |||
:::See ''''''. ---] (]) 04:32, 11 July 2016 (UTC) | |||
= July 11 = | |||
== Algorithm for Union of Sets == | |||
Let us denote <math>I=\{1,\dots,n\}</math>, and denote <math>P_k (A)=\{B|B\subseteq A, |B|\leq k\}</math>. | |||
I am looking for an '''efficient''' algorithm to transform <math>\{A_i\}\in P_n (P_n (I))</math> into <math>\{\cup_{a\in A_i}{a}\}</math>. | |||
Thanks in advance! ] (]) 10:25, 11 July 2016 (UTC) | |||
: Expressed with words, <math>P_k (A)</math> is a set of ''k''-element subsets of some <math>A</math>, right? | |||
: Then <math>P_n (I)</math> is a set of ''n''-element subsets of <math>I</math>. However, <math>I=\{1,\dots,n\}</math> is itself an ''n''-element set, so it has just one ''n''-element subset: <math>I \subseteq I</math>, hence <math>P_n(I)=\{I\}</math>. | |||
: Consequently <math>P_n (P_n (I))</math> is a set of ''n''-element subsets of a singleton <math>P_n (I) = \{I\}</math>, so it is <math>\{\{I\}\}</math> if <math>n=1</math>, or an empty set otherwise. | |||
: Alas I can't get the <math>\{A_i\}\in \ldots</math> part. Do you mean 'a singleton belonging to'...? If so, <math>\{A_i\}\in P_n (P_n (I))</math> could only be <math>\{A_i\} = \{I\} = \{\{1\}\}</math>, so <math>A_i = \{1\}</math> for <math>n=1</math> (and does not exist at all for <math>n\ne 1</math>) and I can't see the reason for the <math>i</math> index at <math>A_i</math>... --] (]) 12:07, 11 July 2016 (UTC) | |||
::I'm sorry for the typo... I fixed my mistake (replacing equality sign with inequality sign). ] (]) <!--Template:Undated--><small class="autosigned">—Preceding ] comment added 13:36, 11 July 2016 (UTC)</small> | |||
:::So, P<sub>n</sub>(I) is simply the ] of I (where I = {1, 2, ... n}), and could be denoted P(I). Then P<sub>n</sub>(P<sub>n</sub>(I)), or more simply P<sub>n</sub>(P(I)), is a truncated power set of P(I), containing only those sets of sets which have n or fewer elements from P(I). And your {A<sub>i</sub>} is an element of that truncated power set of the power set? | |||
:::In other words, you have a list of at most ''n'' lists of integers, the integers themselves ranging from 1 to ''n'', the lists of integers presumably unsorted, with the additional constraints that the individual lists of integers have no duplication and that no two lists of integers from your list of lists would be the same even if sorted, and you want an efficient way to merge this list of lists into a single list containing, without duplication, exactly those integers which appeared in any list of your list of lists. Presumably you hope that these constraints will allow for a more efficient algorithm. Note that our article ] discusses the merging of sorted lists; I don't know what we have on the merging of unsorted lists without duplication. -- ] 14:51, 11 July 2016 (UTC) | |||
::::Okay, I'll read the article about merge algorithm carefully. Thank you for the idea to read this! ] (]) 05:55, 12 July 2016 (UTC) | |||
:::::If you can tell us your actual task, it would help us know if we are up against an . The multiple roles of ''n'' -- it is both the maximum value of the integers in your sets and is the maximum size of the elements which are in the truncated power set of the power set of I -- strike me as unlikely to arise naturally. | |||
:::::Your task, as I understand it, has the (perhaps slight) advantages over simply merging unsorted lists with possible duplication in that you know that the individual sets of integers themselves contain no duplication. Note that ] offer ] which are often ] "using more efficient data structures, particularly various flavors of ], ]s, or ]." Our article mentions the expected <code>union</code> and <code>add</code> operations, but I that ]'s built-in set type also offers an <code>update</code> operation, which "update the set, adding elements from all others." (In essence, a ∪= ].) Even if you wish to roll your own solution, the library implementations may offer suggestions for optimization. -- ] 20:31, 12 July 2016 (UTC) | |||
:::* Assuming ToE did represent correctly the problem, a solution that is optimal in time (but disastrous in space) would be to read all the lists once to find the maximum value <math>n_{max}\leq n</math>, then create a boolean array of <math>n_{max}</math> elements set to false, then read all the list and flip the bits in the array when the value is found. If you know <math>n</math> you do not even need to do the first pass, and there is no way to do it more efficiently (you will eventually have to read all the elements of all the lists, and practically, the bit-flipping is easy to ] in many programming languages such as Python). Returning the sorted union is trivial then. | |||
::::The downside of course is that if there is reason to suspect that <math>n_{max}</math> is much larger than the size of the final list, the array will be much bigger than it would need to be by other methods. ]<sup>]</sup> 09:01, 12 July 2016 (UTC) | |||
== uninstall Yahoo! powered == | |||
Yesterday I installed an update of Freemake Video Downloader. It seemed to install a browser hijacker. It installed "Yahoo! Powered" and I can't uninstall it. Is that a browser hijacker? ] <sup>]</sup> 16:44, 11 July 2016 (UTC) | |||
: Well, I ran ] and that seemed to get it. ] <sup>]</sup> 19:22, 11 July 2016 (UTC) | |||
:That would be ''Search.yahoo.com browser hijacker'' -- There are instructions for manual removal which are somewhat complicated (depending on OS & browser). This seems to be the most recent and comprehensive:. --] (]) 23:35, 12 July 2016 (UTC) | |||
= July 12 = | |||
== Would the graphics card R9 390X or gtx1070 fit on the motherboard GA-H81M-S1? == | |||
Would the graphics card R9 390X or gtx1070 fit on the motherboard GA-H81M-S1?] (]) 12:19, 12 July 2016 (UTC) | |||
:It should since those you mentioned are standard PCIe video cards anyway, but what matters more is if they fit inside the case you're using. ] (]) 12:57, 12 July 2016 (UTC) | |||
::And you want to make sure it works with the power supply. The GTX1070 is rated around 150W, so it should work easily with any power supply that is at least 500W. The R9 390X is rated around 250W. So, you will want 600+W. Because the price isn't much different between 500 and 600W power supplies, I usually get more than I need. If you are using a small power supply (like a 350W that comes free with many cases), you will have issues with using either card. ] (]) 14:10, 12 July 2016 (UTC) | |||
:::Oh Yes, I know about the power supply thing, and I will buy one if needed. Anyway my current Graphics card is gt 730. Thanks for the help ] (]) 16:53, 12 July 2016 (UTC) | |||
::While the case is far more likely to be a problem, I wouldn't assume they definitely fit all motherboards. Some motherboards may place components (particularly heatsinks) which will block excessively long cards, either for the main slot or the second slot if it's a double width card (as many are). Admittedly this isn't very common nowadays for a single card, still you should always check. I don't know what the PCIe standards for physical clearance are but I'm pretty sure they did not and possibly still don't require the sort of physical clearance some cards need. So a motherboard could be fully compliant but still not be able to fit the card. ] (]) 06:02, 13 July 2016 (UTC) | |||
== Movie maker sought == | |||
What is highly praised? | |||
Requirement is, something that can make me select points (from and to) of a video clip, more than one time in one go… – An easy to use tool is sought. <small>A portable software is desirable, however…</small> | |||
] (]) 18:11, 12 July 2016 (UTC) | |||
:Arranging video clips in a desired sequence can be done using ] called a ]. Misplaced Pages has a ] and a ]. ] (]) 23:41, 12 July 2016 (UTC) | |||
== Password Protector; Lockdown protection sought == | |||
Peeps, what’s highly praised? Btw, I possess ''Folderlock'' (currently installed; this provided ''Bitlocker'' – I believe bitlocker is unbreakable, and good, unless you guys re-correct me), ''Keepass'' (Portable acquired, and wired), ''AxCrypt'' (needs internet connection)... -- ] (]) 18:17, 12 July 2016 (UTC) | |||
:{{U|Russell.mo|Apostle}}, it is not clear what your question is. Are you asking for "consumer feedback" about some ] products? If so, Misplaced Pages's reference desk is probably not the place to use; it is intended for factual questions (eg "which company sells product X") rather than opinion. ]<sup>]</sup> 11:33, 13 July 2016 (UTC) | |||
:If you read Misplaced Pages's article on ] you will see that it is good but not unbreakable.--]|] 14:38, 13 July 2016 (UTC) | |||
= July 13 = | |||
== Windows 9x == | |||
Theoretically if Microsoft had continued to develop and invest in the DOS-based Win9x line instead of switching to NT, could they have produced a 64-bit OS running on-top of DOS that took full advantage of modern hardware capabilities? <!-- Template:Unsigned IP --><small class="autosigned">— Preceding ] comment added by ] (]) 14:39, 13 July 2016 (UTC)</small> <!--Autosigned by SineBot--> | |||
:There is no reason that DOS couldn't be altered and compiled to take advantage of a 64-bit CPU. Keep in mind that jumping to 64-bits isn't always an advantage in every single possible application. So, playing an old DOS game in 64-bit DOS won't make it better. ] (]) 16:06, 13 July 2016 (UTC) | |||
== What happens exactly when you clone your SIM card == | |||
If you clone your SIM card and use both the new and old card at the same time, how will the phone company react? How will they discover it? Is there a central server with a list of all numbers and where they are? What if one card accesses the network through roaming? ] (]) 16:21, 13 July 2016 (UTC) | |||
:Yes, they do keep a database, See ], ], and ]. There are special clone SIMs that disables the first SIM when switched on, but as far as I know the carrier has to turn on support for such devices. | |||
:Also see: | |||
:* https://security.stackexchange.com/questions/64294/how-does-a-sim-card-prevent-cloning | |||
:* ] (warning: poor quality article; needs to be expanded and references added) | |||
:--] (]) 18:13, 13 July 2016 (UTC) |
Latest revision as of 00:05, 19 January 2025
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January 4
Zoomify
Is it possible to download the map La ligne de démarcation that is shown via Zoomify?--Antemister (talk) 22:48, 4 January 2025 (UTC)
- Yes, if you google "download zoomify image" you will see various ways. Polygnotus (talk) 23:44, 4 January 2025 (UTC)
- Ah, of course I googled before and found that but was not successful. So I asked here.--Antemister (talk) 11:31, 5 January 2025 (UTC)
- Please mention what you've already tried before and what did not work and what happened instead (e.g. error messages). Polygnotus (talk) 04:57, 6 January 2025 (UTC)
- Tried and of course also the dezoomify tool but got immediately stuck because I was not able to find an URL. Very few programming skills, none regarding HTML, that's why I ask here.--Antemister (talk) 10:46, 6 January 2025 (UTC)
- Please mention what you've already tried before and what did not work and what happened instead (e.g. error messages). Polygnotus (talk) 04:57, 6 January 2025 (UTC)
- Ah, of course I googled before and found that but was not successful. So I asked here.--Antemister (talk) 11:31, 5 January 2025 (UTC)
- @Antemister:
- I wasn't able to download the file as it was taking forever, but this URL appeared to download the files for 30+ minutes on a fast internet. Let us know if this works. TheTechie@enwiki (she/they | talk) 03:19, 8 January 2025 (UTC)
- I've successfully taken images off the IWM via their source code and dezoomify, but I'm puzzled as to how to extract images here, as Dezoomify appears to be perpetually stuck on 'preparing tiles load'. The longest I've seen it take for large images in the past is a couple of minutes. Like Antemister, I've little programming knowledge, but I think the following elements in the code are related:
- <script type="text/javascript" src="ZoomifyImageViewerFree-min.js"></script>
- <script type="text/javascript"> Z.showImage("myContainer", "images/France_LD"); </script>
- On going to http://cartesmich.free.fr/images/France_LD/ I get error 403. Perhaps this website is savvy about theft of its most high-resolution public domain images. Maybe someone has the patience to hunt about in the browser console. JayCubby 04:51, 8 January 2025 (UTC)
- If they're public domain images, it's not "theft". Please avoid such misleading and perjorative language. Andy Mabbett (Pigsonthewing); Talk to Andy; Andy's edits 10:52, 8 January 2025 (UTC)
- It's still potentially in violation of their ToS (not that I much care) and could, per my reading of my law (assuming this is an american website, which it isn't) run afoul of something like the Computer Fraud and Abuse Act.
- The ToS is a reasonable concern, which is why I said theft. JayCubby 15:53, 8 January 2025 (UTC)
- Even if all you say were true (It's highly doubtful; there appear to be no published terms of service - much less any that a user agrees to before viewing the site; and in any case we are not all in the USA), it's still not theft. Andy Mabbett (Pigsonthewing); Talk to Andy; Andy's edits 16:11, 8 January 2025 (UTC)
- You're right--there are no terms (though the host website, free.fr, appears to have a TOS page). JayCubby 16:53, 8 January 2025 (UTC)
- Even if all you say were true (It's highly doubtful; there appear to be no published terms of service - much less any that a user agrees to before viewing the site; and in any case we are not all in the USA), it's still not theft. Andy Mabbett (Pigsonthewing); Talk to Andy; Andy's edits 16:11, 8 January 2025 (UTC)
- If they're public domain images, it's not "theft". Please avoid such misleading and perjorative language. Andy Mabbett (Pigsonthewing); Talk to Andy; Andy's edits 10:52, 8 January 2025 (UTC)
Yes, I came to that cited code, but had no idea to open that container Also tried again dezoomify, and also waited a long time, and after 1-2 hours i get an error message. And it includes a link, , if you alter the numbers you can find various tiles of the map.is it possible to proceed with that, download that folder?--Antemister (talk) 22:34, 8 January 2025 (UTC)
- Hmm! So I pasted this conversation into ChatGPT, and told it to generate code for use in Google Colab. The code is here (it doesn't really do what it's supposed to, at all, but a start).
- The really screwed-up image it generated is here. Hopefully these are of help to someone with more Python experience than I.JayCubby 02:35, 9 January 2025 (UTC)
I gave this another try. This time it was able to actually download the image correctly, but only a horizontal section. The code is collapsed below. I think it needs only some slight tweaking.
Extended content |
---|
import os ::import requests ::from PIL import Image ::# Base URL and directory setup ::BASE_URL = "http://cartesmich.free.fr/images/France_LD/TileGroup8/" ::OUTPUT_DIR = "tiles" ::MERGED_IMAGE = "merged_image.jpg" ::# Ensure the output directory exists ::os.makedirs(OUTPUT_DIR, exist_ok=True) ::# Function to download a tile ::def download_tile(url, save_path): :: response = requests.get(url) :: if response.status_code == 200: :: with open(save_path, "wb") as f: :: f.write(response.content) :: return True :: return False ::# Function to stitch the tiles together ::def stitch_tiles(tiles, tile_size): :: max_x = max(x for x, y in tiles.keys()) + 1 :: max_y = max(y for x, y in tiles.keys()) + 1 :: # Create a blank canvas for the final image :: merged_image = Image.new("RGB", (max_x * tile_size, max_y * tile_size)) :: # Paste tiles onto the canvas :: for (x, y), tile_path in tiles.items(): :: tile_image = Image.open(tile_path) :: merged_image.paste(tile_image, (x * tile_size, y * tile_size)) :: return merged_image ::# Set parameters for downloading tiles ::tile_size = 256 # Assume each tile is 256x256 ::x_range = range(36, 50) # Adjust based on your needs (x-coordinate range) ::y_range = range(24, 40) # Adjust based on your needs (y-coordinate range) ::# Dictionary to store downloaded tile paths ::downloaded_tiles = {} ::# Download tiles ::for x in x_range: :: for y in y_range: :: tile_url = f"{BASE_URL}6-{x}-{y}.jpg" :: tile_path = os.path.join(OUTPUT_DIR, f"6-{x}-{y}.jpg") :: if download_tile(tile_url, tile_path): :: downloaded_tiles = tile_path :: print(f"Downloaded: {tile_url}") :: else: :: print(f"Tile not found: {tile_url}") ::# Stitch the tiles into a single image ::if downloaded_tiles: :: merged_image = stitch_tiles(downloaded_tiles, tile_size) :: merged_image.save(MERGED_IMAGE) :: print(f"Merged image saved as {MERGED_IMAGE}") ::else: :: print("No tiles were downloaded!") |
-- JayCubby 16:09, 9 January 2025 (UTC)
- Oh, again some progress! What horizontal slide? Maybe iterate through the TileGroup folders?--Antemister (talk) 16:56, 9 January 2025 (UTC)
- User:Antemister, it was one of the bottom sections of the map, I have some silly 2FA on my devices and can't access the one I ran it on for a couple of hours. You should be able to run the above code in Colab and ask ChatGPT (or Gemini) for further help. JayCubby 17:02, 9 January 2025 (UTC)
- First heard about Colab but tried, and it seems the Code does something. What is the Folder you got the files downlaoded?--Antemister (talk) 17:30, 9 January 2025 (UTC)
Antemister In a new cell, type
from google.colab import files
files.download('merged_image.jpg')
Apologies for putting all of this inside a hat template, I can't figure out how to correct it. JayCubby 18:15, 9 January 2025 (UTC)
- Again progress, have gotten such a merged image that shows a part of the map. The iteration is just a guess... Shouldnt there be a possibility to list all the files in the folder?--Antemister (talk) 22:58, 9 January 2025 (UTC)
- @Antemister, I very nearly got it to work, the final image is 12,000x12,000px but has errors. import os
- import requests
- from PIL import Image
- from concurrent.futures import ThreadPoolExecutor
- Base URL and output setup
- BASE_URL = "http://cartesmich.free.fr/images/France_LD/"
- OUTPUT_DIR = "tiles"
- MERGED_IMAGE = "merged_image.jpg"
- Ensure output directory exists
- os.makedirs(OUTPUT_DIR, exist_ok=True)
- Function to download a tile
- def download_tile(group, x, y):
- url = f"{BASE_URL}TileGroup{group}/6-{x}-{y}.jpg"
- save_path = os.path.join(OUTPUT_DIR, f"TileGroup{group}_6-{x}-{y}.jpg")
- try:
- response = requests.get(url, timeout=10)
- if response.status_code == 200:
- with open(save_path, "wb") as f:
- f.write(response.content)
- print(f"Downloaded: {url}")
- return (group, x, y, save_path)
- else:
- print(f"Tile not found: {url}")
- except Exception as e:
- print(f"Error downloading {url}: {e}")
- return None
- Function to download all tiles (no detection, brute force)
- def download_all_tiles(groups, x_range, y_range):
- tiles =
- print("Starting brute force tile download...")
- with ThreadPoolExecutor(max_workers=10) as executor:
- futures =
- for group in groups:
- for x in x_range:
- for y in y_range:
- futures.append(executor.submit(download_tile, group, x, y))
- for future in futures:
- result = future.result()
- if result:
- tiles.append(result)
- return tiles
- Function to stitch tiles together
- def stitch_tiles(tiles, tile_size):
- if not tiles:
- print("No tiles to stitch.")
- return None
- Determine the range of x and y coordinates
- all_coords =
- min_x = min(x for x, y in all_coords)
- max_x = max(x for x, y in all_coords)
- min_y = min(y for x, y in all_coords)
- max_y = max(y for x, y in all_coords)
- Create a blank canvas for the final image
- width = (max_x - min_x + 1) * tile_size
- height = (max_y - min_y + 1) * tile_size
- merged_image = Image.new("RGB", (width, height))
- Paste tiles onto the canvas
- for group, x, y, tile_path in tiles:
- tile_image = Image.open(tile_path)
- merged_image.paste(
- tile_image, ((x - min_x) * tile_size, (y - min_y) * tile_size)
- )
- return merged_image
- Main script execution
- tile_size = 256 # Assume each tile is 256x256
- groups = range(0, 16) # TileGroup0 to TileGroup15
- x_range = range(0, 50) # x-coordinates: 0–49
- y_range = range(0, 50) # y-coordinates: 0–49
- tiles = download_all_tiles(groups, x_range, y_range)
- Stitch the tiles into a single image
- if tiles:
- merged_image = stitch_tiles(tiles, tile_size)
- if merged_image:
- merged_image.save(MERGED_IMAGE)
- print(f"Merged image saved as {MERGED_IMAGE}")
- else:
- print("No tiles were downloaded!") JayCubby 03:31, 11 January 2025 (UTC)
- Here's the link. https://limewire.com/d/50995585-f881-4ff5-9186-e0eb55978a5e#Tcw-4kZBQKVH0GS9yZPb-vUvH8t-V04gV-t8MQp8O7k JayCubby 03:38, 11 January 2025 (UTC)
- Thank you, that is sufficient, what I need is the ceasefire/demarcation line. Can you sent me the code with correct formatting? Maybe I can use it in future, to download other zoomified images.--Antemister (talk) 14:18, 11 January 2025 (UTC)
- Here's the link. https://limewire.com/d/50995585-f881-4ff5-9186-e0eb55978a5e#Tcw-4kZBQKVH0GS9yZPb-vUvH8t-V04gV-t8MQp8O7k JayCubby 03:38, 11 January 2025 (UTC)
January 13
Absolute value inequality
A meteorite is 600ft from a satellite and travelling toward the satellite at 42ft/sec. At what times will the meteorite be less than 50ft away from the satellite? Write an appropriate absolute value inequality for the given situation and solve: Let|42t-600|<50 and 42t-600<50 and 42t-600>-50. Thus, 13.10<t<15.48. Afrazer123 (talk) 22:21, 13 January 2025 (UTC)
- What is the question?
- The given data do not specify where the meteorite is at time t = 0, and also not with which speed the satellite is moving. Your solution is based on the (not unreasonable) assumptions that the person who drew up this assignment meant t = 0 to be the initial moment when the meteorite is 600ft away from the satellite, and that the speed of 42ft/s is the speed of the meteorite relative to the satellite. Your solution assumes that the meteorite will not hit the satellite, but pass by it. Under these assumptions, the derived inequations are correct, as is your solution, although not with exact values but with numeric values rounded to two decimals.
- If the meteorite hits the satellite, we don't know what happens after t = 14.29. If the satellite disintegrates, the notion of the distance between the bodies becomes meaningless. --Lambiam 23:59, 13 January 2025 (UTC)
- Please do your own homework.
- Welcome to the Misplaced Pages Reference Desk. Your question appears to be a homework question. I apologize if this is a misinterpretation, but it is our aim here not to do people's homework for them, but to merely aid them in doing it themselves. Letting someone else do your homework does not help you learn nearly as much as doing it yourself. Please attempt to solve the problem or answer the question yourself first. If you need help with a specific part of your homework, feel free to tell us where you are stuck and ask for help. If you need help grasping the concept of a problem, by all means let us know.
- This is additionally the Reference desk for computing and electronics-related topics, not mathematics. --Slowking Man (talk) 06:11, 15 January 2025 (UTC)
- But is it homework? Homework formulates an exercise, often in the form of a problem, asking for its solution. It is not usual for homework to contain the detailed solution to a stated problem. What is then the exercise? --Lambiam 10:32, 15 January 2025 (UTC)
- Maybe they forgot the rest of the problem? Or maybe it's just someone/somebot sloppily copy-pasting stuff from the Web to try and waste people's time. --Slowking Man (talk) 05:18, 16 January 2025 (UTC)
- I think it's not homework. They might be sending stuff into space. Gnu779 (talk) 12:22, 16 January 2025 (UTC)
- 📐 Afrazer123 (talk) 21:33, 17 January 2025 (UTC)
- 📐 Afrazer123 (talk) 21:35, 17 January 2025 (UTC)
- Maybe they forgot the rest of the problem? Or maybe it's just someone/somebot sloppily copy-pasting stuff from the Web to try and waste people's time. --Slowking Man (talk) 05:18, 16 January 2025 (UTC)
- The inequality problem was not school homework. I apologize for the mix-up. I was only checking my answer. Afrazer123 (talk) 21:40, 17 January 2025 (UTC)
- Yeah, thank me for saving you. Someone got confused. 🪐🛰 Gnu779 (talk) 09:43, 18 January 2025 (UTC)
- But is it homework? Homework formulates an exercise, often in the form of a problem, asking for its solution. It is not usual for homework to contain the detailed solution to a stated problem. What is then the exercise? --Lambiam 10:32, 15 January 2025 (UTC)
January 15
What is this character?
Inequality (mathematics) has several characters that my computer renders as little boxes. For example:
- a <⃥͏ a (irreflexivity) — after the first italic a
- if a < b, then b <⃥͏ a (asymmetry) — after the second italic b
What are they? In both cases that I copied, the box is seemingly the same character as the lesser-than sign, since I can't highlight one without the other. I figured I could get the answer from Google (there are enough Unicode charts online), but I get just four results for the combined lesser-than-and-box: the inequality article, two Reddit pages, and something in Thai. When I put the combined lesser-than-and-box into the URL, I'm shown MediaWiki:Badtitletext, which makes sense for a title containing a standalone < character, but not for one where the < elements are part of a special character. Nyttend (talk) 20:29, 15 January 2025 (UTC)
- A less-than with two combining codes:
index chr codepoint utf8 cat name 0 < U+003c 3c Sm LESS-THAN SIGN 1 ⃥ U+20e5 e283a5 Mn COMBINING REVERSE SOLIDUS OVERLAY 2 ͏ U+034f cd8f Mn COMBINING GRAPHEME JOINER
- In other words, it's a "not less than" sign. Unicode's single character for that is hex 226E or ≮, although it uses a slash rather than a backslash ("reverse solidus") to overstrike the < sign. --142.112.149.206 (talk) 02:47, 16 January 2025 (UTC)
- Latex also uses The use of a forward slash, as in to mean is standard. I can't think of a reason for using the backslashed symbol instead and have replaced <\ by ≮. --Lambiam 09:27, 16 January 2025 (UTC)
- In other words, it's a "not less than" sign. Unicode's single character for that is hex 226E or ≮, although it uses a slash rather than a backslash ("reverse solidus") to overstrike the < sign. --142.112.149.206 (talk) 02:47, 16 January 2025 (UTC)
January 16
Miraheze Stuff
What should I do if my wiki is approved on Miraheze? Gnu779 (talk) 12:21, 16 January 2025 (UTC)
- That should depend on the scope and goals of the wiki you have requested, which we don't know. Do you already have a small team of dedicated volunteers who will supply a non-trivial amount of relevant content? An empty wiki is not conducive to attracting new contributors. --Lambiam 23:56, 16 January 2025 (UTC)
- Does it have to do with Yangon Bus Service? --Lambiam 00:12, 17 January 2025 (UTC)
- No, my friend in interested in YBS. It's not me. He told me from a distant place that he wants a wiki. And I have another wiki personally on my kernel. Gnu779 (talk) 12:55, 17 January 2025 (UTC)
Temp Files on C: Drive
I have a Dell Inspiron 3910 running Windows 11. It has a C: drive with what is shown as either 216 GB or 232,783,867,904 bytes. (So those are 216 binary gigabytes, of 2**30 bytes each.) Anyway, This PC usually shows that it has between 20 GB and 45 GB free. If the free storage becomes less than 10%, it displays a red bar in This PC. One parameter that I am familiar with that changes is the size of pagefile.sys, which starts as 12 GB and often increases as it runs up to 24 GB or even 28 GB. I sometimes see the free storage on the C: drive drop to as low as 16 GB, which doesn't bother me, even if it bothers This PC. I don't need unlimited free storage on my C: drive; I need enough free storage on my C: drive. What happened yesterday is that it began displaying that about 5.5 GB was free, much less than I have seen before. I hadn't done anything that should have filled up the C: drive, such as importing video clips from my phone. (I know that video clips are large because they are three-dimensional because time is the third dimension.) I found a few folders on my C: drive that were at least 1 GB and I wasn't using, and I moved them to the E: drive, which is a great monster of a 4TB solid-state device. I thought that might free up a few gigabytes, and it didn't change anything. At about this point Windows Update told me that operating system updates were ready to install, and so I needed to schedule a time for a system restart. After the restart, my C: drive shows as having 44.9 GB free. That is, approximately 39 GB was reclaimed during the restart. I know that approximately 10 GB of that was pagefile.sys. Where did it get more than 25GB of free disk storage from? Is there a way that I can free up this disk storage other than by a restart? I know that some of this was temporary files created by Google Chrome and Microsoft Edge and a few other standard programs. Is there a utility that I can use that frees up temporary storage without restarting Windows? Robert McClenon (talk) 18:10, 16 January 2025 (UTC)
- @Robert McClenon I don't know of any program that finds temp files, but a good guideline I have in general is to use something like WinDirStat or WizTree (preferably the latter), as both show a graphical display of the biggest files on your drive, and may help in this case. TheTechie@enwiki (she/they | talk) 21:44, 16 January 2025 (UTC)
- Thank you, User:TheTechie. I had already been using Disk Space Analyzer Max, which showed me the directories that were using a lot of space, and that didn't help much. What I saw was that Google Chrome had a large amount of data, for instance, but I didn't know what Google Chrome data was useful to it and what was temporary. As I said, I tried moving a few directories, each of which was about 1 GB, from C: to tertiary storage, and that didn't help. I thought it would make about 3 GB free, but maybe it took Windows a while to catch on. Obviously the restart found and freed up a lot of storage. So I am asking whether there is some way other than restarting the system to get it to find and free up the storage. Maybe I am looking for something that either does not exist or is buried somewhere, like treasure. Robert McClenon (talk) 22:19, 16 January 2025 (UTC)
- If it's Google Chrome that's the culprit, have you tried clearing your cache and browsing history? For me, caching and history have led to many GiBs being used in Chrome in the past. TheTechie@enwiki (she/they | talk) 23:07, 16 January 2025 (UTC)
- Whoops forgot ping @Robert McClenon TheTechie@enwiki (she/they | talk) 03:01, 17 January 2025 (UTC)
- Thank you, User:TheTechie - That is useful advice. If I see that Google Chrome is using a lot of SSD space, I will purge its cache and browsing history. I assume that advice also applies to any other web browser. More generally, I infer that if any application is using a lot of temporary space, it can be nuked if there is an option in the application to nuke the temp storage, and, if not, it can always be restarted. Apparently a lot of applications clean up their own litter boxes when they start up. In this respect they are unlike cats. Robert McClenon (talk) 17:25, 17 January 2025 (UTC)
- If it's Google Chrome that's the culprit, have you tried clearing your cache and browsing history? For me, caching and history have led to many GiBs being used in Chrome in the past. TheTechie@enwiki (she/they | talk) 23:07, 16 January 2025 (UTC)
- Thank you, User:TheTechie. I had already been using Disk Space Analyzer Max, which showed me the directories that were using a lot of space, and that didn't help much. What I saw was that Google Chrome had a large amount of data, for instance, but I didn't know what Google Chrome data was useful to it and what was temporary. As I said, I tried moving a few directories, each of which was about 1 GB, from C: to tertiary storage, and that didn't help. I thought it would make about 3 GB free, but maybe it took Windows a while to catch on. Obviously the restart found and freed up a lot of storage. So I am asking whether there is some way other than restarting the system to get it to find and free up the storage. Maybe I am looking for something that either does not exist or is buried somewhere, like treasure. Robert McClenon (talk) 22:19, 16 January 2025 (UTC)
- Install WizTree (free), boom, gives you an overview of everything stored on your storage volumes. Also lets you manage said stuff.
- Anything called "cache" or "temp" can be safely nuked. A cache is just copies of things stored for speeding things up and can always be regenerated. In fact I suggest just making your browser shut off disk caching, which is largely unneeded these days unless you're on a slow connection, and eats away at the lifetime of SSDs, which it sounds like your primary drive is. Web search "<name of browser> disable disk caching"
So I am asking whether there is some way other than restarting the system to get it to find and free up the storage.
It's hard to give a useful general answer to this without knowing what is taking up said storage to begin with. Remember we're not there with you looking at your computer screen; we can't see what's on your drives. The most generic answer is "sure there is as long as the things taking up space aren't locked Windows system files, which require a restart in order to modify/delete them." Software can always be configured to run periodically to go through deleting stuff "in the background".- For one you mentioned pagefile.sys—the Windows page file, which you probably have Windows "managing" the size of on its own (the default). Windows likes to be generous with its size and reserve more than you probably need, which then sits there taking up space. If you have no plans to use hibernation, on a typical modern PC you can usually get away with just disabling it altogether, though you might want to leave a bit of margin and set it to half your RAM size. For this Web search: "Windows change page file size". --Slowking Man (talk) 04:12, 17 January 2025 (UTC)
- Thank you, User:Slowking Man. I have a disk analyzer, but will also try the one you recommend, and see which one gives me more what I want. When you say that you infer that my primary drive is an SSD, I think that you mean that my secondary storage is an , because my primary storage is my 12 GB of RAM, and my secondary storage on the C: is a 216 GB SSD, which is what was getting full. Robert McClenon (talk) 17:25, 17 January 2025 (UTC)
- Yeah. In computer-ese "storage", unqualified, is usually referring to persistent storage, stuff that keeps what's there without needing continual power, which excludes "RAM". And 12 GB is definitely a healthy amount; unless you're doing intensive things like 3D graphics design or playing graphics-intense 3D video games, you can get away with just disabling the page file entirely if you want. Slowking Man (talk) 01:30, 18 January 2025 (UTC)
- Yeah, I was about to ask how they use their computer with just 12 GB RAM. For web browsing/emails, that's more than enough. TheTechie@enwiki (she/they | talk) 02:09, 18 January 2025 (UTC)
- Yeah. In computer-ese "storage", unqualified, is usually referring to persistent storage, stuff that keeps what's there without needing continual power, which excludes "RAM". And 12 GB is definitely a healthy amount; unless you're doing intensive things like 3D graphics design or playing graphics-intense 3D video games, you can get away with just disabling the page file entirely if you want. Slowking Man (talk) 01:30, 18 January 2025 (UTC)
- Thank you, User:Slowking Man. I have a disk analyzer, but will also try the one you recommend, and see which one gives me more what I want. When you say that you infer that my primary drive is an SSD, I think that you mean that my secondary storage is an , because my primary storage is my 12 GB of RAM, and my secondary storage on the C: is a 216 GB SSD, which is what was getting full. Robert McClenon (talk) 17:25, 17 January 2025 (UTC)
install a specific version of OSX
Hi. I am trying to replicate the steps described here: https://stackoverflow.com/questions/71241711/is-there-a-way-to-access-your-own-airtag-data-via-api
The instructions specify: "You need macOS 14.3.1 or earlier for this to work. Items.data is encrypted in 14.4 and later."
I currently do not have any Apple hardware, so I plan to purchase a "mac mini, m1, 2020" machine. After I receive the machine, I plan to factory reset it for security.
After a factory reset, is it possible to install a specific version, such as 14.3.1 onto the machine?
(My understanding that if I just use the regular "system update" path, it would it me directly to the latest OSX, which is currently 15.2.) Epideurus (talk) 21:42, 16 January 2025 (UTC)
- I would presume so. Thing is though, if you give the system Internet access it'll probably keep "trying" to update you to the latest OS X version. Are you sure pursuing this line of action is the best way to go about accomplishing what you want? If you're already willing to spend money on the problem, why not just buy some different tracking device not from Apple that lets you talk to it however you want? What's the ultimate goal you're trying to accomplish here? --Slowking Man (talk) 04:22, 17 January 2025 (UTC)
- Hi. Thank you for the help.
- I haven't spent a dollar on this project yet, so I'm very flexible. I'm also pretty open-minded and will choose any brand or solution that fits my needs. I'm basically looking for a tracker to put in my bag so that I don't lose it.
- I checked out the existing tracker networks and there's basically only two major ones: Apple AirTag and Google Find My Device. The former network is much larger than the latter, at least in 2025. The size of Apple's network (number of Apple smartphones in the wild) enables my bag to be tracked accurately, without me having to ever carry an Apple smartphone.
- I'm usually not a fan of closed and propriety systems, but in this case it could take years before Google's (slightly more) open system catch up in network size unfortunately. Epideurus (talk) 17:48, 17 January 2025 (UTC)
- Along with @Slowking Man:, I'm still very confused why you're dead set on OSX 13 and AirTags. If this is only for your personal use why does it matter how big the tracker network is? TheTechie@enwiki (she/they | talk) 18:34, 17 January 2025 (UTC)
- Solution A: If I put an airtag on my bag, then I can know where it is at all times, with 2 minute updates 24/7. (Regardless of where I physically am, or what phone I'm using.) This is because there are Apple devices blanketing the NA city that I live in, and they are willing to report the location of my bag to the Apple servers, without any payment or involvement from me.
- Solution B: If I buy a similar device from another manufacturer, let's say Google or Samsung, then their location service would report my bag as being in my house, but with minimal location updates in the future. This is because there aren't any Google or Samsung devices in my city willing to report the location of my bag to the Google/Samsung servers for free. To improve the accuracy of the location updates, I would have to maintain a Google/Samsung device near my bag, which kinda defeats the whole point.
- I hope I'm explaining it correctly. Epideurus (talk) 00:48, 18 January 2025 (UTC)
- There are plenty of options, such as Tile, Marco Polo Tracking... You could throw in a cheapo device like a Raspberry Pi with a cellular module and battery. If you want to splurge, you can get something with a GPS and satellite comms connection that will work basically anywhere on Earth.
- Alternately if you think the Airtag is a good fit for your purpose why not just just get a cheap used iDevice™, if all you want is the Apple Find thing? I will point out that two things here are at odds: wanting to do things on-the-cheap, vs wanting constant real-time location updates. If you can relax one or the other that makes it a lot easier. Perhaps you don't really need 120-second interval location updates? --Slowking Man (talk) 01:24, 18 January 2025 (UTC)
- That said, in my observations, fast tracking is not really anything that's really the case much with Find My anymore as sometimes my device's locations will be reported as their location from 2-5 days ago with Find My refusing to update. (Note: I'm still on iOS 18.2 so it might be fixed in 18.2.1.) Even when it used to be fast, it would only ping when you opened Find My, and would not auto-update for 5-7 mins. TheTechie@enwiki (she/they | talk) 05:51, 18 January 2025 (UTC)
- Along with @Slowking Man:, I'm still very confused why you're dead set on OSX 13 and AirTags. If this is only for your personal use why does it matter how big the tracker network is? TheTechie@enwiki (she/they | talk) 18:34, 17 January 2025 (UTC)
duplicate tab in Firefox
In Firefox (on MacOS) I sometimes accidentally hit a combination of keys that makes a new tab, same as the current tab, appear at the right. Naturally I have not been able to reproduce this behavior intentionally, nor find it in a list of Firefox keyboard shortcuts. Am I dreaming? —Tamfang (talk) 21:54, 16 January 2025 (UTC)
- Right click tab, select "Duplicate Tab"? TheTechie@enwiki (she/they | talk) 22:50, 16 January 2025 (UTC)
- ctrl and drag on the tab will duplicate it; I've done that by accident; I can't see a non-mouse way of doing it. -- Finlay McWalter··–·Talk 22:51, 16 January 2025 (UTC)
- And it is not which apparently means delete page to Misplaced Pages! Graeme Bartlett (talk) 23:46, 16 January 2025 (UTC)
- Alt-↵ Enter with the address bar highlighted will open its contents in a new tab, which is often functionally a tab duplication. So maybe you wrangled a Ctrl-L, Alt-↵ Enter? (Sorry, not exactly sure what these map to on MacOS.) Emberfiend (talk) 09:08, 17 January 2025 (UTC)
January 17
Opera
Any tips or tricks recommended? Serial (speculates here) 18:42, 17 January 2025 (UTC)
- Avoid? -- Seriously, what do want to know? --Wrongfilter (talk) 18:53, 17 January 2025 (UTC)
- Isn't Opera run by a Chinese company now? TheTechie@enwiki (she/they | talk) 19:32, 17 January 2025 (UTC)
- Chinese Opera? --Lambiam 23:36, 17 January 2025 (UTC)
- No, they are owned by Kunlun Tech Co., Ltd. Which should already raise privacy bells. TheTechie@enwiki (she/they | talk) 23:39, 17 January 2025 (UTC)
- Meh. So, worse comes to the worse, the Central Committee get to see my browsing history. In a few days, your government gets owned by Putin. Swings and roundabouts, komrade. Serial (speculates here) 23:48, 17 January 2025 (UTC)
- You can't say I didn't warn you. You didn't have to bring US politics into this. This is the computing reference desk, not politics. TheTechie@enwiki (she/they | talk) 23:53, 17 January 2025 (UTC)
- Meh. So, worse comes to the worse, the Central Committee get to see my browsing history. In a few days, your government gets owned by Putin. Swings and roundabouts, komrade. Serial (speculates here) 23:48, 17 January 2025 (UTC)
- No, they are owned by Kunlun Tech Co., Ltd. Which should already raise privacy bells. TheTechie@enwiki (she/they | talk) 23:39, 17 January 2025 (UTC)
- Chinese Opera? --Lambiam 23:36, 17 January 2025 (UTC)