COCO 2017 Updated +Created
This is the one used on MLperf v2.1 ResNet, likely one of the most popular choices out there.
2017 challenge subset:
TODO didn't manage from source Ubuntu 22.04, their setup bitrotted way too fast... it's shameful even. Until I gave up and went for the magic Docker of + github.com/bbcmicrobit/micropython, and it bloody worked:
git clone https://github.com/bbcmicrobit/micropython
cd micropython
git checkout 7fc33d13b31a915cbe90dc5d515c6337b5fa1660
docker pull ghcr.io/carlosperate/microbit-toolchain:latest
docker run -v $(pwd):/home --rm ghcr.io/carlosperate/microbit-toolchain:latest yt target bbc-microbit-classic-gcc-nosd@https://github.com/lancaster-university/yotta-target-bbc-microbit-classic-gcc-nosd
docker run -v $(pwd):/home --rm ghcr.io/carlosperate/microbit-toolchain:latest make all

# Build one.
tools/makecombinedhex.py build/firmware.hex examples/counter.py -o build/counter.hex
cp build/counter.hex "/media/$USER/MICROBIT/"

# Build all.
for f in examples/*; do b="$(basename "$f")"; echo $b; tools/makecombinedhex.py build/firmware.hex "$f" -o "build/${b%.py}.hex"; done
The pre-Docker attempts:
sudo add-apt-repository -y ppa:team-gcc-arm-embedded
sudo apt update
sudo apt install gcc-arm-embedded
sudo apt install cmake ninja-build srecord libssl-dev

# Rust required for some Yotta component, OMG.
sudo snap install rustup
rustup default 1.64.0

python3 -m pip install yotta
The line:
sudo add-apt-repository -y ppa:team-gcc-arm-embedded
warns:
E: The repository 'https://ppa.launchpadcontent.net/team-gcc-arm-embedded/ppa/ubuntu jammy Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
and then the update/sudo apt-get install gcc-arm-embedded fails, bibliography:
Attempting to install Yotta:
sudo -H pip3 install yotta
or:
python3 -m pip install --user yotta
was failing with:
Exception: Version mismatch: this is the 'cffi' package version 1.15.1, located in '/tmp/pip-build-env-dinhie_9/overlay/local/lib/python3.10/dist-packages/cffi/api.py'.  When we import the top-level '_cffi_backend' extension module, we get version 1.15.0, located in '/usr/lib/python3/dist-packages/_cffi_backend.cpython-310-x86_64-linux-gnu.so'.  The two versions should be equal; check your installation.
Running:
python3 -m pip install --user cffi==1.15.1
did not help. Bibliography:
From a clean virtualenv, it appears to move further, and then fails at:
Building wheel for cmsis-pack-manager (pyproject.toml) ... error
error: [Errno 2] No such file or directory: 'cargo'
So we install Rust and try again, OMG:
sudo snap install rustup
rustup default stable
which at the time of writing was rustc 1.64.0, and then OMG, it worked!! We have the yt command.
However, it is still broken, e.g.:
git clone https://github.com/lancaster-university/microbit-samples
cd microbit-samples
git checkout 285f9acfb54fce2381339164b6fe5c1a7ebd39d5
cp source/examples/invaders/* source
yt clean
yt build
blows up:
annot import name 'soft_unicode' from 'markupsafe'
bibliography:
Divine Praises Updated +Created
The prayer recited by Luke Dashjr in the Prayer wars of the Bitcoin blockchain in 2011.
Microcontroller Updated +Created
As of 2020's, it is basically a cheap/slow/simple CPU used in embedded system applications.
Zongzi Updated +Created
Eaten during Dragon Boat Festival, but can be bought year round.
Buy frozen. Pick the ones with meat and eggs!!! Boil.
Cost about 4 dollars for 2.
You can't eat them every day because too heavy, but they are so amazingly tasty!!!
Chinese poet Updated +Created
Chinese poetry anthology Updated +Created
Chinese poetry bibliography Updated +Created
Chinese traditional music album Updated +Created
Chinese traditional music label Updated +Created
Classical Chinese poetry form Updated +Created
Douhua Updated +Created
Freshly made douhua is a blessing.
Li Bai Updated +Created
This is likely the most famous Chinese poet of all time.
Marketing Updated +Created
Apache Jena CLI tools setup Updated +Created
The CLI tools don't appear to be packaged for Ubuntu 23.10? Annoying... There is a package libapache-jena-java but it doesn't contain any binaries, only Java library files.
To run the CLI tools easily we can download the prebuilt:
sudo apt install openjdk-22-jre
wget https://dlcdn.apache.org/jena/binaries/apache-jena-4.10.0.zip
unzip apache-jena-4.10.0.zip
cd apache-jena-4.10.0
export JENA_HOME="$(pwd)"
export PATH="$PATH:$(pwd)/bin"
and we can confirm it works with:
sparql -version
which outputs:
Apache Jena version 4.10.0
If your Java is too old then then running sparql with the prebuilts fails with:
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: arq/sparql has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:621)
Build from source is likely something like:
sudo apt install maven openjdk-22-jdk
git clone https://github.com/apache/jena --branch jena-4.10.0 --depth 1
cd jena
mvn clean install
TODO test it.
If you make the mistake of trying to run the source tree without build:
git clone https://github.com/apache/jena --branch jena-4.10.0 --depth 1
cd jena
export JENA_HOME="$(pwd)"
export PATH="$PATH:$(pwd)/apache-jena/bin"
it fails with:
Error: Could not find or load main class arq.sparql
as per: users.jena.apache.narkive.com/T5TaEszT/sparql-tutorial-querying-datasets-error-unrecognized-option-graph
Zhang Ziqian Updated +Created
Li sao (guqin song) Updated +Created
www.facebook.com/131402556881886/posts/655763214445815/ gives an origin:
Li Sao was composed by Cheng Kangshi in late Tang dynasty based on the poem Li Sao, authored by Qu Yuan (340-278 BC) in the Warring States period of ancient China.
The silkqin.com entry: www.silkqin.com/04qart/07sqmp/57ls.htm does not mention this however.
Video 1.
Li sao performed by Guan Pinghu
. Source. Track from Master Of Traditional Chinese Music: guqin
Video 2.
Lisao performed by NiniGuqin (2020)
Source.
Zhu Bajie Updated +Created
Lu Zhishen scene Updated +Created

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