Cramming for my #GCP #PCA exam, tomorrow. Googling around to see if I can find some practice tests to work through to expose any gaps in the knowledge I'll need for the test (the Google-provided ones were "too easy"). Found this one site, but it really feels like:
* The person(s) writing the quiz may be ESL
* The person(s) writing the quiz lack attention to detail (see attached image)
* Some of the questions' answers are either straight-up wrong or not as accurate as they ought to be
I assume that at least some of them are "someone sat the test, then tried to write down what they recalled from the tests". But still…
#pca
Continuing to work through #GCP training – having gotten my #ACE, I now need to get my #PCA.
At any rate, one of the training-modules was talking about data transfer times and popped up a size/rate table to show transfer-times. It instantly transported me back to when I was doing DR-related delivery-consulting.
I still remember one customer being pissed when I'd finished setting up their storage-replication and declared, "well, I'll see you in about 21 days to verify that we're actually finished and functional". They were incredulous, sputtering about "how can you possibly say 21 days". I'd reminded them that I'd noted that their replication-bandwidth was objectively too small (while they had a T3, their data set was large and they couldn't get their networking people to remove the session-limits that were constraining the replication to a fraction of that T3's capability). We'd spent a couple days benchmarking and working with their networking people to try to address the discrepancy between their theoretical bandwidth and the observed bandwidth. In fairness, they probably would have been ill-advised to dedicate the entirety of the T3's bandwidth to replications — since they presumably had other projects that needed some of its bandwidth — but the amount they were able to allocate to the storage replication was way too low. I'd given them an initial transfer-time estimate, the day prior, based on my benchmarking and the first couple hours of the replication's sync-up. My return the next day was mostly to confirm that things were moving along as expected — so that I didn't have to revise my estimate (fortunately, over the intervening 16 hours, my numbers had stayed dead-on).
Just to add some gas to the fire:
• I reminded them that they had had the option to speed up the initial sync by seeing it with a tape-based restore – which would have required them to ship tapes from NJ to AZ, import the tapes into their DR site's tape library system, then do a restore to the DR site's storage array
• I pointed out to them that, with such a low transfer-rate, if they ever had link-loss, it could take them hours to days to get back in sync. I further pointed out and that, worst case (i.e., on a long-enough link-outage), the replication-software might declare the sync "stale" and they'd have to re-initialize and re-do the transfer.
This was probably 2005 or 2006. So, it's not that they had a ton of data to transfer, it's just that cross-country private circuits weren't available with nearly as high of transfer speeds and what options were available were silly-expensive.
To give you a sneak peek into my courses, I’ve just published a free video on YouTube that walks through a complete data project in R.
Watch the video here: https://www.youtube.com/watch?v=l2OgRdofp90
#rstats #statistics #datascience #dataviz #statisticalanalysis #pca
ELA USA v #Estonia #PCA Case No 2018-42 Award 21 February 2025
https://www.transnational-dispute-management.com/legal-and-regulatory-detail.asp?key=36358
Tribunal
Judge Bruno Simma (Presiding Arbitrator)
Professor Helene Ruiz Fabri
Judge Peter Tomka
Multispectral Remote Sensing Expression of Lineaments and Alteration Minerals in Part of Crystalline Rock Units of Southwestern Nigeria - Implication on Gold Prospecting
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https://doi.org/10.1016/j.oreoa.2025.100091 <-- shared paper
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#GIS #spatial #mapping #ASTER #Gold #Hydrothermal #HydrothermalAlteration #Lineament #Landsat #ETM #EnhancedThematicMapper #phyllic #Ilesha #schist #belt #geology #mining #Nigeria #naturalresources #mineral #mineralresources #golddeposits #aerogeophysical #remotesensing #geophysical #spatialanalysis #geomorphology #geomorphometry #alteration #propylitic #argillic #mineralogy #XRD #structuralgeology #lithology #PrincipalComponentAnalysis #PCA #prospecting #fracture #joints #faulting #Multispectral #Lineaments #Crystalline
Two things can be true at once: #MegBasham is guilty of many of the same journalistic sins as CBS News (but from the Right), repeatedly taking stuff out of context to fit a narrative, *AND* she’s right that a worship event ”for [one race] of worshippers” is highly objectionable. #Christianity #Worship #Presbyterian #PCA #Journalism https://x.com/megbasham/status/1892613475114922297
#statstab #271 {bruceR} package
Thoughts: Useful functions for psychologists. I like how it treats t-tests, giving all the options from Lakens (2013) for Cohen's d, and comparison with other software.
Anyone know anything about the Southwest Popular/American Culture Association or its members? They're holding a conference in Albuquerque in Feb and my sister got an invite to exhibit for no fee, but she's not sure why, given that her small press (Amador Publishers) is not an academic press. Maybe they're trying to fill a few empty tables?
#SWPACA #PCA
Check out the subject areas -- is this the new Semiotics?
https://swpaca.org/subject-areas/
George Leslie Mackay, 1st Presbyterian minister to Taiwan, mentions the welcome the people gave him. (He had some medical training). After bringing out their sick, they were happy to listen to the gospel. They asked for their own preacher.
What would modern Christians do if a town they intended to live in had sick and suffering approaching them?
How can you give physical relief to the sick and suffering and the hope of the gospel message?
What is your #Christian life experience? (Reposting from X)
➡️ (Conservative) United Church of Christ (born and raised)
➡️ Evangelical Free (after the church left the #UCC)
➡️ (Concurrently) #PCUSA (studied and participated in PCUSA programs in college)
➡️ #PCA (seminary and early pastoral ministry)
➡️ (Concurrently) #NonDenominational (worshipping with some amazing saints on Saturday nights while serving on Sundays)
➡️ Non-denominational #Reformed (pastoring a #ChurchPlant)
'Robust Principal Component Analysis using Density Power Divergence', by Subhrajyoty Roy, Ayanendranath Basu, Abhik Ghosh.
http://jmlr.org/papers/v25/23-1096.html
#pca #robust #divergence
Belaruskali v #Lithuania #PCA Case No 2024-03 - Procedural Order No 1 - 16 February 2024 https://www.transnational-dispute-management.com/legal-and-regulatory-detail.asp?key=35807&utm_source=dlvr.it&utm_medium=mastodon
Belaruskali v #Lithuania #PCA Case No 2024-03 - Procedural Order No 3 - Suspension of the Proceedings - 24 June 2024 https://www.transnational-dispute-management.com/legal-and-regulatory-detail.asp?key=35806&utm_source=dlvr.it&utm_medium=mastodon
Performer photos from the PCA Open MIke, Parish Center for the Arts, Westford MA – October 13, 2024. Hosted by John Ferullo. Featured performer Aaron Tornberg
Principal Component Analysis (PCA) is a powerful technique for reducing the dimensionality of your data while maintaining its essential structure. A key advantage of PCA is its ability to transform high-dimensional data into a lower-dimensional space, enabling new ways to visualize complex data. Two crucial plots that help visualize PCA are loading plots and biplots.
I've created a video to walk you through these visualizations: https://www.youtube.com/watch?v=f34zq2jErK0
A few days ago, the Statistics Globe YouTube channel reached 30K subscribers (see here: https://www.youtube.com/c/statisticsglobe)!
To celebrate this milestone, I've launched a 3-day promotion offering a 33% discount on all my courses, with only 24 hours left. The promotion ends tomorrow, Friday, at 3:33 pm GMT+2: https://statisticsglobe.com/courses
#rstats #python #statistics #datascience #statisticalanalysis #rstudio #datamanipulation #pca #youtube
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