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#ros

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Continued thread
VM (Vicky) Brasseur

D: “Everyone raise your left hand”

A room of 1000 people raise their left hands

D: “Leave your hand up if you’ve ever done one of these things…” /shows a slide of actions like contributing, asking or answering questions, and more.

A room of 1000 people leave their hands up

D, taking a picture of the room: “Thank you! There’s my proof to my company for why we use #ROS and #OpenSource.”

Now _that_ is an effective way to show the power of community. 💪
#OpenRobotics #ROSCon2024

Preston Maness ☭

I am currently working through dependency hell with #ros. It is not fun.

"What's that? You want to run a ros2-ros1 bridge in a container? AND run a #ros2 node on the host? So you can test that some newer ros2 code can publish to a topic and see if the old ros1 device picks up the messages like advertised? HAHAHAHAHAHAHAHAHA FUCK YOU"

Fine. You want a separate IP address per node. *That* makes sense at least.

/me proceeds to figure out how to get macvlan shit working for podman so that a rootful container can get an ip address from dhcp and have its own IP. This also involves, on #Debian at least, introducing some systemd unit files that the official package doesn't include for whatever reason.

"HAHAHAHAHAHA NICE TRY. WE'RE STILL GONNA RESOLVE ROS_MASTER_URI WITH THE HOSTNAME EVEN IF YOU PUT THE IP IN ROS_MASTER_URI ENV VAR"

But the container is ephemeral! I don't know the IP-Hostname pairs ahead of time!

/me proceeds to study ROS_IP

JFC. I've resorted to this god-awful hack in my podman run call for executing the bridge:

bash -c 'ROS_IP=$(ifconfig | grep eth0 -A 1 | tail -n 1 | awk '"'"'{print $2}'"'"') ros2 run ros1_bridge dynamic_bridge --bridge-all-topics'

IT'S QUOTE ESCAPING ALL THE WAY DOWN, FOLKS!

I know the docs say "fuck you, make the names resolve," but I'd rather not fuck around with modifying /etc/hosts on a bunch of nodes just to make ros happy.

Oh. And once you use ROS_IP, you are married to it. EVERY node's gotta use it. All or nothing.

FFFFFFFUUUUUUUUUUUU

Yeah. I'm glad I switched careers to nursing. (all of this has been an exercise in helping someone else navigate the ros landscape, which I was blissfully unaware of until now. But at least they're gonna get my help :P )

#DependencyHell#dev#development
Replied in thread
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DoomsdaysCW

@aka_quant_noir

The Role of Reactive Oxygen Species in Plant Response to #Radiation

From Works cite:
Ultraviolet-B radiation stress triggers reactive oxygen species and regulates the antioxidant defense and photosynthesis systems of intertidal red algae Neoporphyra haitanensis. Front. Mar. Sci. 2022, 9, 1043462. [Google Scholar]

mdpi.com/1422-0067/24/4/3346

MDPIThe Role of Reactive Oxygen Species in Plant Response to RadiationRadiation is widespread in nature, including ultraviolet radiation from the sun, cosmic radiation and radiation emitted by natural radionuclides. Over the years, the increasing industrialization of human beings has brought about more radiation, such as enhanced UV-B radiation due to ground ozone decay, and the emission and contamination of nuclear waste due to the increasing nuclear power plants and radioactive material industry. With additional radiation reaching plants, both negative effects including damage to cell membranes, reduction of photosynthetic rate and premature aging and benefits such as growth promotion and stress resistance enhancement have been observed. ROS (Reactive oxygen species) are reactive oxidants in plant cells, including hydrogen peroxide (H2O2), superoxide anions (O2•−) and hydroxide anion radicals (·OH), which may stimulate the antioxidant system of plants and act as signaling molecules to regulate downstream reactions. A number of studies have observed the change of ROS in plant cells under radiation, and new technology such as RNA-seq has molecularly revealed the regulation of radiative biological effects by ROS. This review summarized recent progress on the role of ROS in plant response to radiations including UV, ion beam and plasma, and may help to reveal the mechanisms of plant responses to radiation.
#NoDumping#FukushimaDaiichi#ROS
Tim Redick :ros: :julia:

Controlling a #kuka robot via the realtime interface in #ROS (1) running in a #Docker container using the #WSL works surprisingly well. I had concerns that the Windows network stack or task management would prevent sending commands to the realtime target with a consistent enough rate. Bonus: even the 3D visualization in #RViz works, although I had to enable software rendering. Otherwise the meshes are not rendered. RViz2 works fine with Nvidia and the Intel GPU.

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nullagent

The @dataparty api builds on a ton of ideas I've had playing at the intersection of real time(ish) robotics solutions using ROS(Robot Operating System) and also cloud solutions.

An earlier project I built was a cloud scale ROS 1 "master" service 👇🏿 .

I've basically just been srinking down ROS-1 style high performance pub/sub streaming to the point I can run it anywhere and with waaaay more security than ROS1 and targeting general app development.

youtube.com/watch?v=fwk3fmDV4Z

YouTubeVapor Master - Cloud Scaling ROS 1.0By RosHub Inc
#ROS#cloud#robotics
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