Micro black hole

{tag=Connectome by species}
{tag=Mus musculus}
{title2=Mus musculus}

Bibliography:
* https://www.nature.com/articles/d41586-023-02559-9 The quest to map the mouse brain by Diana Kwon (2023)

\Video[https://www.youtube.com/watch?v=ldXEuUVkDuw]
{title=A Simulated Mouse Brain in a Virtual Mouse Body by <Human Brain Project> (2015)}
{description=Nice <brain-in-the-loop>.}

Mouse brain

Ciphertext

{tag=Connectome by species}
{tag=Drosophila melanogaster}
{wiki}


Drosophila brain

Monophyly

{c}

https://cirosantilli.com/linux-kernel-module-cheat/#p51 (https://raw.githubusercontent.com/cirosantilli/linux-kernel-module-cheat/a0d6fa15a207cb40cd8ce090c77aa9b55d7605a6/README.adoc[permalink])

* battery life:
 * 2023-04: on-browser streaming + light browsing on <Ubuntu 22.10>: about 2h45. Too low! Gotta try buying a new battery.
* 2022-01-04 updated firmward after noticing that <ubuntu 21.10 does not wake up from suspend> seemed to happen every time when not connected to external power. `dmidecode` diff excerpt:
 ``
 BIOS Information
 Vendor: LENOVO
 - Version: N1UET40W (1.14 )
 - Release Date: 09/28/2017
 + Version: N1UET71W (1.45 )
 + Release Date: 07/18/2018
 ``
 used the "Ubuntu Software" GUI as mentioned at: https://support.lenovo.com/gb/en/solutions/ht510810-how-to-do-software-updates-linux[]. Kudos for making this accessible to newbs.

 After doing that, another update became available to: 0.1.56, clicked it and was much faster than the previous one, and didn't auto reboot. After manual reboot, `dmidecode` diffed again:
 ``
 BIOS Information
 Vendor: LENOVO
 - Version: N1UET71W (1.45 )
 - Release Date: 07/18/2018
 + Version: N1UET82W (1.56 )
 + Release Date: 08/12/2021
 ``
 plus a bunch of other lines.
* 2021-06-05 upgraded to <Ubuntu> 21.04 with a clean install from an ISO. Selected
 * "Minimal installation"
 * "Erase disk and install Ubuntu". Notably, this erased the <Microsoft Windows> that came with the computer and was never used not even once
 * "Erase disk ans use ZFS"
 * Encrypt the new Ubuntu installation for security
 After this, the GUI felt fast, who would have thought that erasing a bunch of stuff would make the system faster!

 `lsblk` contains:
 ``
 zd0 230:0 0 500M 0 disk
 └─keystore-rpool 253:0 0 484M 0 crypt /run/keystore/rpool
 nvme0n1 259:0 0 476.9G 0 disk
 ├─nvme0n1p1 259:1 0 512M 0 part /boot/efi
 ├─nvme0n1p2 259:2 0 2G 0 part
 │ └─cryptoswap 253:1 0 2G 0 crypt
 ├─nvme0n1p3 259:3 0 2G 0 part
 └─nvme0n1p4 259:4 0 472.4G 0 part
 ``
 and `lsblk -f`:
 ``
 zd0 crypto_LUKS 2
 └─keystore-rpool ext4 1.0 keystore-rpool
 nvme0n1
 ├─nvme0n1p1 vfat FAT32
 ├─nvme0n1p2 crypto_LUKS 2
 │ └─cryptoswap
 ├─nvme0n1p3 zfs_member 5000 bpool
 └─nvme0n1p4 zfs_member 5000 rpoo
 ``

 Then:
 ``
 grep '[rb]pool' /proc/mounts
 ``
 contains:
 ``
 rpool/ROOT/ubuntu_uvs1fq / zfs rw,relatime,xattr,posixacl 0 0
 rpool/USERDATA/ciro_czngbg /home/ciro zfs rw,relatime,xattr,posixacl 0 0
 rpool/USERDATA/root_czngbg /root zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/srv /srv zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/usr/local /usr/local zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/games /var/games zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/log /var/log zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/lib /var/lib zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/mail /var/mail zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/snap /var/snap zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/www /var/www zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/spool /var/spool zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/lib/AccountsService /var/lib/AccountsService zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/lib/NetworkManager /var/lib/NetworkManager zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/lib/apt /var/lib/apt zfs rw,relatime,xattr,posixacl 0 0
 rpool/ROOT/ubuntu_uvs1fq/var/lib/dpkg /var/lib/dpkg zfs rw,relatime,xattr,posixacl 0 0
 bpool/BOOT/ubuntu_uvs1fq /boot zfs rw,nodev,relatime,xattr,posixacl 0 0
 ``
 which gives an idea of how the above map to mountpoints.

 Had two GUI freezes since installation, a fixed images shows no matter what I do, possibly graphics only, but impossible to tell (next time I'll try SSH access). No <Nvidia> drivers installed yet.

2020-06-06: dropped some lemon juice on the bottom left of touchpad. Bottom left button not working anymore... I'm an idiot. There are many other alternatives, but very aggravating, I'll replace it for sure. Can't find the exact replacement part or any videos showing its replacement online easliy, dang. For the T430: https://www.youtube.com/watch?v=F3lzV9uXRjU Asked at: https://forums.lenovo.com/t5/ThinkPad-P-and-W-Series-Mobile-Workstations/P51-left-bottom-button-below-trackpad-mouse-left-click-stopped-working-possible-to-replace/m-p/5019903 Also I could not access it because you need to remove the HDD first: https://www.youtube.com/watch?v=5Klawxc7T_Y and I can't pull it out even with considerable force, unlike in the video... And OMG, those button caps are impossible to re-install once removed!!! Then when I put the whole thing back together, the upper buttons were not working anymore. FUUUUUUUUCK. When first opening I pulled on it without properly removing the cap and it came off, but it didn't look broken in any way and I put it back in. Keyboard works thank God, so right black connector is fine, left white one oppears to be the one for upper keys and trackpoint, both of which stopped working. The hardware manual confirms that they are both part of the same device, so basically a mouse :-) TODO can it be bought separately from te keyboard? Doesn't look like it, photo of keyboard part includes those buttons. The manual also confirms that the bottom buttons are one device with the trackpad "trackpad with buttons", thus forming the second entire mouse.

2019-04-17: popup asking about "ThinkPad P51 Management Engine Update" from from 182.29.3287 to 184.60.3561, said yes.

<Ubuntu> 17.10 setup after buying it:

* partition setup: https://askubuntu.com/questions/343268/how-to-use-manual-partitioning-during-installation/976430#976430
* BIOS:
 * for NVIDIA driver:
 * for KVM, required by Android Emulator: enable virtualization extensions
* TODO fix the brightness keys:
 * failed: https://askubuntu.com/questions/769006/brightness-key-not-working-ubuntu-16-04-lts/770100#770100

Battery life shown by Ubuntu battery app after installation:

* before NVIDIA driver setup: 8h
* after: 6.5h

Lenovo ThinkPad P51 (2017) log

Ciro Santilli's hardware / Lenovo ThinkPad P51 (2017) log

Command line utility

Information

Data

Self-driving car

Synthetic data

Test data 14

Ciro Santilli's Homepage

 Home

{wiki}

Here's an example of the chain rule. Suppose we want to calculate:
$$
\dv{}{x} e^{2x}
$$
So we have:
$$
f(x) = e^x \\
g(x) = 2x
$$
and so:
$$
f'(x) = e^x \\
g'(x) = 2
$$
Therefore the final result is:
$$
f'(g(x))g'(x) = e^{2x} 2 = 2 e ^{2x}
$$


Chain rule

{c}

* you don't get any/sufficient recognition for your contributions. The closest they have to upvotes and reputation is the incredibly obscure "thank" feature which is only visible to the receiver itself: https://en.wikipedia.org/wiki/Help:Notifications/Thanks
* <deletionism> is a tremendous problem on Wikipedia, for two main causes:
 * tutorial-like subjectivity
 * notability
 The stuff you wrote can be deleted anytime by some random admin/opposing editor, examples at: <deletionism on Wikipedia>{full}.

 This also possibly leads to <edit wars> in the case of sub-page content (full page deletion is more clearly arbitrated).
* Scope too limited, and politics defined. Everything has to sound encyclopedic and be notable enough. This basically excludes completely good tutorials.
* Insane impossible to use <markup language>-base talk pages instead of issue trackers?! Ridiculous!!! That change alone could make Wikipedia so much more amazing. Wikipedia could become a Stack Exchange killer by doing that alone + some basic reputation system. Some work on that is being done at: https://www.mediawiki.org/wiki/Extension:DiscussionTools[], already in Beta as of 2022.
* <Edit wars>

Wikipedia

OurBigBook.com / Wikipedia

{c}
{title2=2001}
{wiki}

Why Wikipedia sucks: <ourbigbook.com/Wikipedia>{full}.

Best languages:
* https://en.wikipedia.org/wiki/Latin_Wikipedia[latin]
* https://en.wikipedia.org/wiki/Esperanto_Wikipedia[esperanto]. Other constructed languages: https://en.wikipedia.org/wiki/Wikipedia:List_of_constructed_languages_with_Wikipedias

The most important page of Wikipedia is undoubtedly: https://en.wikipedia.org/wiki/Wikipedia:Reliable_sources/Perennial_sources which lists the accepted and non accepted sources. Basically, the decision of what is true in this world.

Wikipedia is incredibly picky about copyright. E.g.: https://en.wikipedia.org/wiki/Wikipedia:Deletion_of_all_fair_use_images_of_living_people because "such portrait could be created". Yes, with a time machine, no problem! This does more harm than good... excessive!

Citing in Wikipedia is painful. Partly because of they have a billion different templates that you have to navigate. They should really have a system where you can easily reuse existing sources across articles! <How to use a single source multiple times in a Wikipedia article?>{full}

\Video[https://www.youtube.com/watch?v=_Rt0eAPLDkM]
{title=What Happened To Wikipedia's Founders?}
{description=
* https://youtu.be/_Rt0eAPLDkM?t=113 encyclopedia correction stickers. OMG!
* https://youtu.be/_Rt0eAPLDkM?t=201 Jimmy was a moderator on <MUD (game genre)> games
}

\Video[https://www.youtube.com/watch?v=j9-CovbP-7U]
{title=Inside the Wikimedia Foundation offices by <Wikimedia Foundation> (2008)}

Date	 Liked by	 Title	 Discussions	Updated
2023-02-12	Satoshi Nakamoto 0	Micro black hole	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Mouse brain	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Ciphertext	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Drosophila brain	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Monophyly	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Lenovo ThinkPad P51 (2017) log	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Command line utility	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Information	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Data	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Self-driving car	0	2025-10-14
2023-02-12	Satoshi Nakamoto 0	Synthetic data	0	2025-07-16
2023-02-12	Satoshi Nakamoto 0	Test data 14	0	2025-07-16
2023-02-06	effendy 0	 Home	3	2025-07-16
2023-01-13	Barack Obama 11	Chain rule	0	2025-07-16
2022-11-29	rtnf 1	Wikipedia	1	2025-07-16
2022-11-29	rtnf 1	Wikipedia	0	2025-07-16
2022-11-23	anynomous8kahlgajkqiujlg 0	Test data 9	0	2025-07-16

Ciro Santilli @cirosantilli 37