• 42 Posts
Joined för ett år sedan
Cake day: dec 19, 2021


Woah! That’s amazing. We think that we know a lot, and yet we are still discovering organelles within a model organism that gets scrutinized under the microscope every day all over the world!

Cool! A very interesting glimpse into the world of micro-machining technologies. I never heard of this kind of thing before

I don’t know much about the potential health benefits, but it is a very cool plant.

I have one growing in my apartment, and one can do some cool chemistry experiments with the turmeric powder! The molecule that makes the powder yellow is called curcumin. You can use it as a yellow dye, a pH sensor, and it has even been used as a component for a low-voltage organic light-emitting diode.

There is a controversial theory of smell that I find fascinating. The hypothesis was put forward by Luca Turin (video), and the idea is that the several of the receptors involved in the perception of smell are not the typical ‘lock-and-key’ receptors that can sense the shape of molecules, but instead work via a mechanism that is able to sense specific molecular vibrations. This might be achieved via an electron transfer reaction in which the electron transfer can only happen if a molecule that contains a vibration with the right frequency is present in the binding pocket.

One reason why this hypothesis is compelling is because we it seems like we are able to recognize molecules with specific atoms and functional groups. One dramatic example I know of is sulfur compounds. We can easily sense a ‘sulfur’ smell, even if the sulfur-containing molecules are very different.

For example, compare ethanol to ethanethiol: their shapes are quite similar, but the ethanethiol has a strong sulfur smell. Simple alcohols in general have an ‘alcoholic’ smell, and thiols have a ‘sulfur’ smell.

When I saw this paper originally I became very excited because I thought that this would finally lay this hypothesis to rest (or confirm it), but it turns out that the receptor that was studied is a specific receptor of a particular class and does not contain the class of receptors that can sense alcohols and thiols… So the vibration theory of odor still stands!

I hope that an odor receptor sensitive to sulfur-containing compounds is solved soon! I am very curious.

The reason why I specify this type of material is because wet paper can break off and harden, and cotton can leave some thin fibers behind that wrap around the insect. But, if done carefully enough, any absorbent material can work.

My priority would be to help the insect dry while avoiding applying much force on the insect. I would use some highly absorbent material that does not produce much fluff - like a microfiber cloth, and try to dry the area around the wings and as close to the wings as possible. I would then put the cloth right by its legs and see if the insect can hold onto it and lift itself up.

Another option would be to try to make its surroundings as safe as posible, blocking direct sunlight but letting air flow, and then wait for the insect to dry. But if the drying is too slow the insect might hurt itself or run out of energy if it gets agitated.

It is a delicate situation. I have had some similar situations with insects falling into the pool and then trying to get them dry. Sometimes the insects do lose a wing in the process, or even lose it in the water before I find them.

I know that patent trolls are a thing, but I was under the impression that these patent trolls would still have to produce lots of specific but still broad patents. For example, they will file a patent for a whole class of compounds for treating a specific group of diseases without having the data to back it up.

But in this case it is even worse!

They patented a trivial idea - “send voice commands from phone to computer” - without providing any novel practical implementations of the idea. How is this acceptable?

patent/US9794348 Using voice commands from a mobile device to remotely access and control a computer


A method of using voice commands from a mobile device to remotely access and control a computer. The method includes receiving audio data from the mobile device at the computer. The audio data is decoded into a command. A software program that the command was provided for is determined. At least one process is executed at the computer in response to the command. Output data is generated at the computer in response to executing at least one process at the computer. The output data is transmitted to the mobile device.

The MAX_TITLE_LENGTH is applied to posts that are fetched from other instances using activitypub. The posts that are posted within an instance do not pass through that processing step.

Yes, I agree with your assessment. I think that from the point of view of geo-politics, countries tend to make self-serving choices. Human rights are usually not a priority. There are human rights abuses all over the world, but if addressing them does not serve a political purpose, they tend not to appear in the spotlight. As soon as an excuse is needed one can of course summon these abuses and blast them through the media.

I am not saying that I agree with this approach or that this is the way I think thinks should be. But I think that this is the answer to why the EU does not impose sanctions to the US. Similarly, the US lets the Saudis get away with a lot of human rights abuses to avoid souring relations. And the Israel <-> Palestine conflict, why is the world so chill about that?

Also, the sanctions did impact the EU economy and the leaders have had to pay a price. They have gone as far as they have in large part because the US has pressured them - the EU possibly would not have several of the more drastic measures if it was up to them, to protect their economy.

Because the US is a closer ally and the EU was forced to pick a side. The EU did not move spontaneously and alone, it moved as part of coordinated action. Furthermore, Russia launched a direct attack into European territory, making it a much more direct military threat.

What you are proposing here is different. You are asking the EU to spontaneously and unilaterally decide to go after its most powerful ally because of the human rights violations that they are committing somewhere else.

Sounds to me like that would be a very expensive choice that would severely affect the quality of life of EU voters. Since those in a position to impose sanctions are those who play the game of getting elected, I don’t think that it is in their best interest to tank the economy.

Yup, this was fixed in version 0.0.24! No worries.

What version do you have? I think you have one of the older versions, you can find the latest one here:

I think that the newest update changed something such that the the instances that updated to 17.0 are no longer being recognized by the crawler. So the crawler hasn’t been updated to deal with the changes.

Great job figuring that out!

At some point it would be fun to work on some new guides anyway :-)

“There is no law against prisoner organ donation,” he said

the bill will “restore bodily autonomy to incarcerated folks by providing opportunity to donate organs and bone marrow”

🤔 🤔 🤔 🤔

I think that if you use the new docker-compile file, the one that includes the NGINX block, then you might not need to go through the step of the nginx configuration.

I have not tested this myself though, but I can test it when I make the updated tutorial.

I can do that, but I can’t right now, I am very busy writing for my thesis unfortunately :/

If I manage to write enough tonight I might be able to do it tomorrow.

Oh no! It is possible to save your SSL certificates by simply copying the files into your computer, then you don’t need to run the certbot again.

Try removing the lemmy.conf file from /etc/nginx/sites-enabled,

And then run:

sudo wget /etc/nginx/sites-enabled/uebishe.conf

sudo systemctl restart nginx

Or, I have made an nginx config file that will work for you

If you already created an nginx configuration file, move it somewhere else. Then, get the new configuration file to the nginx folder, and then restart the nginx service by running these two commands:

sudo wget /etc/nginx/sites-enabled/uebishe.conf

sudo systemctl restart nginx

Ah! So you skipped this step:

Now i skip old step about “wget -O lemmy.conf”

You need to have the lemm.conf file under /etc/nginx/sites-enabled, this is the file that tells nginx how to manage the connection. Don’t skip that step! Get that file and modify it by adding your domain name

A realistic look at CO2 emissions, climate change and the role of sustainable chemistry
**Abstract** >The increase of man-made greenhouse gas (GHG) emissions is a serious global problem. Hence the 2015 Paris Agreement and the COP meetings, which show the willingness of governments to reduce emissions and fight climate change. Their main goals are keeping average temperatures to max 2 °C above pre-industrial times, and reaching net-zero emissions by 2050. But how realistic are these goals? GHG emissions may be everyone's long-term problem, but they are nobody's short-term problem. The huge benefits we all reap from the free energy provided by fossil fuels, and the way that governments, companies and people handle risk, create enormous barriers. I will show here, using simple back-of-the-envelope calculations, that we will not reach the Paris Agreement goals. Moreover, I will explain the reasons why much excellent research in sustainable chemistry will not make a sizable dent in CO2 emissions. This doesn't mean we should give up. We must keep on developing and implementing sustainable technologies. But we should also prepare to adapt to living in a world with average temperatures 3–4 °C higher than pre-industrial times. Optimistic scenarios make people complacent. Wake up. It is later than you think.

Sorry, I did not realize that these files had not yet been updated with the changes necessary for version 0.17.0, which are described here:

I could not find an example of the files configured correctly in github, so I have uploaded some example files. You get them this way:


Then modify the variables inside {}, like the domain name and the database password.

Remove the following blocks from the docker-compose file:

  # communication to web and clients
  # communication between lemmy services
    driver: bridge
    internal: true
    image: nginx:1-alpine
      - lemmyinternal
      - lemmyexternalproxy
      # only ports facing any connection from outside
      - 80:80 
      - 443:443
      - ./nginx.conf:/etc/nginx/nginx.conf:ro
      # setup your certbot and letsencrypt config 
      - ./certbot:/var/www/certbot
      - ./letsencrypt:/etc/letsencrypt/live
    restart: always
      - pictrs
      - lemmy-ui

And try again. Does it work?

Do you want to install a fresh instance, or do you want to upgrade an instance?

If you are installing fresh, most of that tutorial is still going to work out. But you now need to pull the config file this way:

wget lemmy.hjson

If you install the more recent docker version, you don’t have to install docker-compose the same way. Follow the instructions from the website, and use ‘docker compose’ instead of ‘docker-compose’.

The nginx configuration does not need to change.

What problems are you getting?

An issue was opened for that three days ago:

I don’t think it is possible through the UI at the moment.

Gracias! (Posted from Jerboa)

Very interesting collection of strategies! I like the strategy of removing the sugars that the bacteria use for invading the mouth.

Genetic engineering is super cool! But, in the context of agriculture, I personally prefer strategies that use a more holistic approach and try to use what we know from nature to try to create a balanced and healthy ecosystem. Unfortunately these more “organic” strategies are not compatible with a rapidly changing environment and the insanely high production demand of the world we live in. These are tools that we want to use to cover up the symptoms of a sick world, not to treat the underlying causes. Continuing in this direction is unfortunately going to cost us a large amount of the world’s diversity 😞

Nice article! :)

I like to think of the following example:

There is a magical room. This room is full with an infinite number of images - every possible image that can exist - every combination of pixels - is in this room. A person while in this room has an infinite amount of time and an infinite amount of patience. You enter that room with the intention of finding an image that conveys a particular emotion or feeling. You walk through, looking image by image, trying to find one which you believe conveys that emotion. Finally, you find the perfect image. You take it out of the room so that now you can share it with others.

Did you make art?

Not everyone would answer that question the same way. For someone, the act of a meaningful selection is artistic in itself - in a way similar to pointing the camera somewhere and clicking a button as long as there is an intention to do so. But someone else might say “no, you simply picked up an image that already existed, so it is not art”. There is no objective set of parameters to define art, so there are lots of different subjective opinions.

Also related. My family makes jewelry. I have helped them make some AI-inspired designs and posted them on social media. Some people got especially upset and left us nasty comments in which they stated that AI does not make real art, that this was intellectual theft, etc. We never made any artistic claim or called it art - they are jewelry designs that look cool.

AI can be extremely helpful during the first steps of the design process. Usually a client describes their vision, an artist draws it, the client asks for corrections, artist draws version 2, client changes their mind, version 3… AI-aided design can facilitate this process dramatically by quickly iterating through options live to eventually generate a much better initial input for the artist!

I see more people criticizing AI art for not being art than I see people who use AI tools claiming that it is!

Oh, that looks like an error in your lemmy.hjson settings file. If you share that one too with the passwords redacted I can check.

If you go to your lemmy directory and type docker-compose logs -f lemmy, what does it say?

Can you share your docker-compose.yml file, removing the database password and any other private information?

Also, did you change the variables in the Lemmy UI environment?

(Edit to specify, in the docker-compose.yml file the variables are now different)

The lemmy-ui environment variables have changed, and should now look like:

    - LEMMY_UI_HTTPS=true

There are also other instructions that you need to follow. Are you following the release note instructions?



docker compose logs -f lemmy

(or docker-compose) to see the logs.

Is the last message saying that the database migration is going to be run? If so, you need to wait. It can take a few hours.

Shamelessly stolen from [reddit/r/piracy](

Bookmark shortcuts
I just figured this out and it is so convenient. I will show by example. I am using Firefox, but other browsers might work the same way. (1) Go to (2) Ctrl+D, then enter to save as a bookmark (3) Ctrl+shift+O to open the bookmark settings (4) Select the lemmy bookmark that you just created (5) At the bottom of the menu, you can set a Keyword. Write the letter "l". (6) Close the menu You can now type "Ctrl+L" to jump to the navigation bar, then type "l", enter. You can create single or few-letter keywords for the sites that you visit often. Bonus related tip: In the browser preferences, under "search", you can define a keword for specific search engines. For example, if you set wikipedia to "@w", you can then search directly from the navigation bar by typing "@w whatever"

How do you feel about this personal e-mail format?
Let's say as an example that my full name is Robert Frankel If I purchase the domain `` and use that to create my custom e-mail: `` And then use this as my personal e-mail in a professional setting (resume, contact e-mail, business card, etc..). Do you think this would be perceived as unprofessional and silly in a negative way, and even confusing to some? Or do you think most people would understand it right away and think of it in a net positive way - perhaps a bit silly, but memorable. Don't worry about whether the e-mail will be filtered as spam, I am curious about how it is perceived. I am asking because I have a domain like this that I use for private personal stuff, and I wonder whether it would be a good or bad idea to use that e-mail when applying for jobs, as a small extra detail to stand out 😁

Is it in bad taste to take content directly from Reddit/Stack exchange?
I would like to make a community dedicated to posting interesting science questions that have been asked and answered in other sites. The post would be a copy of the question and the comments would be copies of the answers that were found to be interesting - always with the username attribution and the link to the original post. With this format, users would not need to leave the site, and it is easy to discuss the answers directly in the comments. But I have my doubts about whether this is appropriate, as I think that it might be copyright infringement. So, what do people in Lemmy think? Would this format be blatant theft and wrong? Perfectly reasonable? Somewhere in between?

Transient sensations of impending loss of consciousness: the “blip” syndrome
I have experienced these 'blips' in the past and was deeply troubled by them, as I thought that they could indicate something serious going on. While I don't suggest anyone to disregard any symptom that they consider to be potentially serious (read as: consult your doctor if you suspect something could be wrong), I have noticed throughout my life many different types of 'glitches' such as this one that turn out to be benign and common. To me, learning about these effects is a form of applied psychology in the sense that understanding that these feelings are normal and usually benign can help prevent health anxiety.

I am sharing this because I found it to be an interesting analysis.

A critical well-sourced discussion about several of the statements presented in a book about sleep and health.

The paper is already a few years old, but I have just read it and it provides some very valuable insight about the redox reactions that happen inside our cells, and explains why NADP is so prominent in this redox chemistry.

An excellent lecture about the psychology of procrastination and some tips about how to break the habit.