Course-v1:edz+11+2023 SP/en/block-v1:edz+11+2023 SP+type@video+block@3d7c9b9b96d54fd9ae6c4f5f5fa176b9

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description"video in Test Rerun Course - Learn the skills Topics for Impact organizers need to run consistent, high-impact campaigns that invite new contributors, partners, and supporters to the movement. "
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subtitle-4771-5105-1"So the"
subtitle-5105-8108-2"first tab is pretty, pretty intuitive."
subtitle-8742-12979-3"But as you can see in my example here, if I go to the climate change category,"
subtitle-13380-16683-4"the methane and the alternative fuels"
subtitle-18685-21721-5"subcategories have a lot of information in it"
subtitle-21721-24791-6"that really don't have to do with climate change."
subtitle-25325-28695-7"And this is because categories are what's called folksonomy"
subtitle-29629-32832-8"So if you're you're interested in reading about these more,"
subtitle-32832-36002-9"this is the technical term Folksonomy"
subtitle-39205-40173-10"Yeah. So."
subtitle-40173-41608-11"So let me."
subtitle-41608-44611-12"So someone's asking Mousseau is asking about depth."
subtitle-44611-48415-13"Let's let's look at the actual category on English Wikipedia real quick."
subtitle-48882-51117-14"And then we can we can see that."
subtitle-51117-54521-15"So if I go to category climate change"
subtitle-56523-61161-16"and I, I look at this category, right?"
subtitle-62095-65432-17"So we actually start with the article Climate change,"
subtitle-65432-66966-18"and then we'll go to the category."
subtitle-66966-70470-19"So how do articles get in categories,"
subtitle-71271-74441-20"articles get in categories when someone goes to the bottom of the page"
subtitle-74641-77644-21"or in visual ed edits the category tab"
subtitle-78078-80780-22"and they add these individual"
subtitle-82182-83083-23"categories."
subtitle-83083-86286-24"Now, the problem with categories is you have to know the exact name"
subtitle-86486-89989-25"of the category in order to add it to Wikipedia article."
subtitle-90423-92559-26"This creates some problems."
subtitle-92559-95161-27"Say you have this complex title"
subtitle-95161-98131-28"like History of Climate variability and change"
subtitle-98498-101434-29"that might not be intuitive to new editors."
subtitle-101434-105238-30"So what often happens with categories because it's a Folksonomy,"
subtitle-106272-110110-31"is that content will be both in the top category"
subtitle-110176-113913-32"or in subcategories at different levels of depth."
subtitle-114147-114747-33"Right."
subtitle-114747-118952-34"So a depth first layer or depth is just the categories"
subtitle-118952-122255-35"that are subcategories in the actual category of climate change."
subtitle-122455-123356-36"Right."
subtitle-123356-127427-37"And then a second layer depth might be one of these subsub categories."
subtitle-127760-128094-38"Right."
subtitle-128094-131097-39"And then a third layer and then a fourth"
subtitle-131431-134901-40"and then a fifth and then a sixth and so on."
subtitle-135135-135735-41"Right."
subtitle-135735-138338-42"So you actually have just in this first"
subtitle-140073-143009-43"subcategory, you have about six layers of depth."
subtitle-143009-147547-44"So one, two, three, four, five, six are No."
subtitle-147580-150583-45"Five layers of depth."
subtitle-150950-153953-46"This kind of depth problem"
subtitle-154687-157490-47"is means that categories can often get"
subtitle-157490-160493-48"kind of unruly very quickly."
subtitle-160560-162162-49"For example, and I'm going to show you this"
subtitle-162162-165632-50"in the greenhouse gas one, because it's the most obvious."
subtitle-165965-168902-51"So if I go one step down and greenhouse gases,"
subtitle-168902-171604-52"if I know anything about climate change, it kind of makes sense. Right."
subtitle-171604-175308-53"Like subcategory is about carbon dioxide, emissions reduction, whatever"
subtitle-175608-178845-54"makes sense within climate change as greenhouse gases."
subtitle-179212-183716-55"But if I click one more under a carbon dioxide, you see very quickly"
subtitle-183716-186419-56"that applications of carbon dioxide is in here."
subtitle-186419-189722-57"And if I click one more time carbonated drinks, and then if I go"
subtitle-189722-193426-58"one more time, carbonated drinks has cola and then cola brands,"
subtitle-193726-196296-59"and then all of a sudden we're looking at like Coca Cola"
subtitle-196296-199799-60"and Pepsi articles that have nothing to do with climate change."
subtitle-200066-201334-61"Right."
subtitle-201334-204337-62"The deeper you go, the more likely you're going"
subtitle-204337-207740-63"to have like completely wild content, right?"
subtitle-208441-211411-64"This is true of all folksonomies,"
subtitle-212245-214480-65"because these sub categorization"
subtitle-214480-217483-66"doesn't make sense in this context."
subtitle-217550-222322-67"You want to be really careful about the depth category"
subtitle-222322-225491-68"and you might like in this case,"
subtitle-225491-228494-69"I just realize that like carbon dioxide"
subtitle-229062-232065-70"has a lot of kind of sub problems, right?"
subtitle-232232-235101-71"So if I'm running a query, maybe I want to remove"
subtitle-236402-239105-72"information in that that sub"
subtitle-239105-242442-73"query in a query because I'm like, oh, okay."
subtitle-243443-247513-74"Yeah, but the English slide deck is right"
subtitle-248481-251484-75"here."
subtitle-251851-255088-76"So, so you'll often query at a certain depth."
subtitle-255121-258258-77"And the deeper you go in a folk sonomy,"
subtitle-258424-261361-78"the more complicated it will get."
subtitle-261361-266132-79"And so when you start grabbing all of the, the stuff gets really complicated."
subtitle-266366-267900-80"It's also easy way,"
subtitle-267900-270870-81"like, depth is an easy way to break PETScan."
subtitle-271104-275408-82"So if you ask for too much depth it has it tells the program"
subtitle-275408-279746-83"to search too many categories and then it can overwhelm the tool."
subtitle-280079-285218-84"So one of the easiest ways to break PET scan is to put a depth"
subtitle-285218-288354-85"to deep for the topic you're working on."
subtitle-289522-290056-86"I always"
subtitle-290056-295328-87"recommend starting with like one, two or three depth because usually on English,"
subtitle-295328-298331-88"Wikipedia and Commons, this is not that much content,"
subtitle-299198-302201-89"but like the deeper you go, the more complicated it gets"
subtitle-304137-305738-90"as as I just showed."
subtitle-305738-308474-91"So when you run a query,"
subtitle-308474-312779-92"you can basically do two things with categories in this first page, right?"
subtitle-312812-315581-93"You can add categories and you can remove them."
subtitle-315581-318818-94"By removing them, you remove all the subcategories as well."
subtitle-319619-323556-95"And so this is a good way to to filter."
subtitle-323956-327593-96"If you add like I want climate change and Nigeria"
subtitle-327593-330930-97"and a couple other topics, you have an option to do intersection"
subtitle-330930-334867-98"or union, which is how do you this is like machine logic, right?"
subtitle-334867-339305-99"Like, do I filter it by intersection like you have to have both category"
subtitle-339305-345211-100"trees on an article or a union in that I want to combine both category trees."
subtitle-347013-349982-101"You should, every time you click do it,"
subtitle-350016-353286-102"you should see an effect in the number of results you have."
subtitle-353386-358691-103"So I just removed carbon dioxide from the category tree on this"
subtitle-359292-361894-104"and is on a query"
subtitle-361894-364897-105"I ran and you see it removed about 150"
subtitle-365531-367467-106"results from the thing."
subtitle-367467-370803-107"So a good way to check if your query is doing"
subtitle-370803-374207-108"what you think it's doing is to see if the number of results change,"
subtitle-375241-378644-109"every time you you tweak a PETScan query."
subtitle-379946-381781-110"This first tab is"
subtitle-381781-385118-111"the simplest by a far part of using it,"
subtitle-385451-389622-112"as you can see right now, my my Chrome browser is crashing a little bit"
subtitle-389756-392759-113"because it's rendering all that data from it."
subtitle-392925-396195-114"So there's always a risk with PETScan."
subtitle-396195-401300-115"And this is, you know, part of the risk of doing a live demo with PET"
subtitle-401300-406372-116"scan to that, you will kind of overwhelm either your browser"
subtitle-406472-410977-117"because there's a lot of data involved or the tool itself"
subtitle-412412-415381-118"because you're you're actually looking at quite a lot of content."