96 well microplate Updated 2025-07-16
Biologists are obsessed with these!
Ouptut 0 disassembles as:
OP_IF OP_INVALIDOPCODE 4effffffff <large constant> OP_ENDIF
The large constant contains an ASCII Bitcoin Core patch entitled Remove (SINGLE|DOUBLE)BYTE so presumably this is a proof of concept:
From a3a61fef43309b9fb23225df7910b03afc5465b9 Mon Sep 17 00:00:00 2001
From: Satoshi Nakamoto <satoshin@gmx.com>
Date: Mon, 12 Aug 2013 02:28:02 -0200
Subject: [PATCH] Remove (SINGLE|DOUBLE)BYTE

I removed this from Bitcoin in f1e1fb4bdef878c8fc1564fa418d44e7541a7e83
in Sept 7 2010, almost three years ago. Be warned that I have not
actually tested this patch.
---
 backends/bitcoind/deserialize.py |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/backends/bitcoind/deserialize.py b/backends/bitcoind/deserialize.py
index 6620583..89b9b1b 100644
--- a/backends/bitcoind/deserialize.py
+++ b/backends/bitcoind/deserialize.py
@@ -280,10 +280,8 @@ opcodes = Enumeration("Opcodes", [
     "OP_WITHIN", "OP_RIPEMD160", "OP_SHA1", "OP_SHA256", "OP_HASH160",
     "OP_HASH256", "OP_CODESEPARATOR", "OP_CHECKSIG", "OP_CHECKSIGVERIFY", "OP_CHECKMULTISIG",
     "OP_CHECKMULTISIGVERIFY",
-    ("OP_SINGLEBYTE_END", 0xF0),
-    ("OP_DOUBLEBYTE_BEGIN", 0xF000),
     "OP_PUBKEY", "OP_PUBKEYHASH",
-    ("OP_INVALIDOPCODE", 0xFFFF),
+    ("OP_INVALIDOPCODE", 0xFF),
 ])
 
 
@@ -293,10 +291,6 @@ def script_GetOp(bytes):
         vch = None
         opcode = ord(bytes[i])
         i += 1
-        if opcode >= opcodes.OP_SINGLEBYTE_END and i < len(bytes):
-            opcode <<= 8
-            opcode |= ord(bytes[i])
-            i += 1
 
         if opcode <= opcodes.OP_PUSHDATA4:
             nSize = opcode
-- 
1.7.9.4
bitcointalk.org/index.php?topic=5231222.0 discusses what happens if there is an invalid opcode in a branch that is not taken.
Allen Mouse Brain Updated 2025-07-16
Grouping their mouse brain projcts here.
Video 1.
Tutorial: Allen Developing Mouse Brain by Allen Institute (2014)
Source.
Allen Wu Updated 2025-07-16
This situation is the most bizarre thing ever. The dude was fired in 2020, but he refused to be fired, and because he has the company seal, they can't fire him. He is still going to the office as of 2022. It makes one wonder what are the true political causes for this situation. A big warning sign to all companies tring to setup joint ventures in China!
Video 1.
ARM Fired ARM China’s CEO But He Won’t Go by Asianometry (2021)
Source.
All GitHub Commit Emails Updated 2025-07-16
In this project Ciro Santilli extracted (almost) all Git commit emails from GitHub with Google BigQuery! The repo was later taken down by GitHub. Newbs, censoring publicly available data!
Ciro also created a beautifully named variant with one email per commit: github.com/cirosantilli/imagine-all-the-people. True art. It also had the effect of breaking this "what's my first commit tracker": twitter.com/NachoSoto/status/1761873362706698469
Figure 1.
GitHub Archive query showing hashed emails
. It was Ciro Santilli that made them hash the emails. They weren't hashed before he published the emails publicly.
Figure 2.
All GitHub Commit Emails repo before takedown
. Screenshot from archive.is.
First we can observe that the exact matrices are different. For example, taking the standard matrix of :
and:
both have the same metric signature. However, we notice that a rotation of 90 degrees, which preserves the first form, does not preserve the second one! E.g. consider the vector , then . But after a rotation of 90 degrees, it becomes , and now ! Therefore, we have to search for an isomorphism between the two sets of matrices.
For example, consider the orthogonal group, which can be defined as shown at the orthogonal group is the group of all matrices that preserve the dot product can be defined as:
A blog in every web framework Updated 2025-07-16
A (multi-user) blog is the hello world of the web, so creating one of those is the best way to quickly evaluate web technology, i.e. time to Hello World.
Some new frameworks like FeathersJS are making a chat app instead, as that highlights the push notifications a bit better.
Allotrope Updated 2025-07-16
Single chemical element, single phase (usually solid), but different 3D structures.
The prototypical examples are the allotropes of carbon such as diamond vs graphite.
Abjad Updated 2025-07-16
Unlike abugida, these actually make you guess vowels, which are mostly or all not written down in any way. Terrible.
E.g.: the main Arabic script.
Alloy Updated 2025-07-16
This is a good concept. For the ammount most people save, having a simple and easy to apply investment thesis is the best way to go.
Video 1.
All the financial advice you’ll ever need fits on a single index card
. Source.
Alphabet Updated 2025-07-16

There are unlisted articles, also show them or only show them.