Sérgio F. de Lima

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Physics Teacher and human intelligence Enthusiast. Prof. Física e Entusiasta da Inteligência human

Localização:: Rio de Janeiro

Rio de Janeiro

Brasil

Cidade natal:: Rio de Janeiro

Página web:: https://sfl.pro.br

Sat, 20 Jan 2024 07:35:41 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Mike Macgirvin 🖥️ escreveu a seguinte publicação Fri, 19 Jan 2024 18:36:59 -0300

I promise to add some more documentation before this is released, but I just want to keep providing updates on what we're doing here at the streams repository - especially as it concerns the fediverse and conversations.

The background is that we've always provided what I'll call "containerised conversations" in earlier iterations of the fediverse (several years prior to the emergence of Mastodon and ActivityPub). These are quite different from microblogs - which aren't really conversations at all, but more like people throwing posts into space kind of willy nilly. Each post and each comment can be addressed to a completely different audience.

In our alternate implementation of the fediverse, conversations are contained and more coherent. We do this by directing all comments back to the person who started the original post of the conversation, regardless how many levels of nested comments. This person "owns" the topic and is responsible for distributing all the comments to the original audience. This is how one implements restricted conversations - sometimes called circles or aspects - as well as private groups; which are very difficult to accomplish in a microblog platform. This is why only a very small number of fediverse implementations support these concepts.

When we brought our work to the ActivityPub fediverse several years ago, it conflicted with the microblogs, who quickly dominated the space. So we provided some ActivityPub extensions to continue our work and still use these very important conversational constructs.

Fast forward a few years, and we've been squeezed into a corner, and what we consider a superior way of managing "restricted" conversations has been relegated to obscurity. But during this time, a handful of ActivityPub developers have been working on tools which also provide this functionality, in better ways that in our original extensions. So we're updating our repository to accommodate these changes.

This work is described in the following Fediverse Enhancement Proposals (FEPs). The first two deal with signatures and retires the earlier flawed LD-signatures. This allows the content owner to relay private content to other members of the conversation, while providing proof that the author is not being spoofed. HTTP-Signatures don't work in this context because the original author may not have granted third-party permission to access the content directly and may not even be aware of who is involved in the conversation. The audience belongs to somebody else. It is being relayed by the conversation owner who does have permission to access the content directly.

FEP-c390: Identity Proofs
FEP-8b32: Object Integrity Proofs

The next two proposals deal with working with contextual collections. In this body of work, every conversation is a collection. Anybody can create a post, but only the owner of a conversation can add a response message to their conversation and distribute it to a pre-defined audience. This is accomplished by turning the conversation into a Collection object.

FEP-400e: Publicly-appendable ActivityPub collections
FEP-7888: Demystifying the context property

The end result is that the fediverse is able to support a wide variety of interactions which don't fit in the microblog or 'Twitter' model of interaction. There also may be times when one model works better for some conversations than others. Perhaps a simplified description would be to call these "constrained" or "contained" conversations, and the traditional microblog usage might be called "unconstrained" because conversations and their audiences have no binding to each other. Contained conversations create this binding and creates a conversation as an atomic property in the fediverse. It is also possible to "fetch" this container and access the entire conversation (all activities and comments) across all participants. This is not practical or possible using the unconstrained model. In any case, this is what we're doing. It makes things like the old Google+ "circles" and features like Facebook style private groups available to the fediverse without clumsy workarounds.

And best of all, it doesn't break compatibility with microblog software. It just provides additional functionality and features which that model of interaction cannot provide, as well as allow both mechanisms to co-exist without breaking each other's expectations of visibility and privacy.

Or put in another light, we support all of Mastodon's weird and non-standard privacy modes because we choose to. Some projects do not, and this is permitted by the relevant specifications. This just ensures that everybody supports ours - because we aren't giving them a choice.

Wed, 17 Jan 2024 16:19:05 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Sergio F. Lima no Friendica

Gradiente de #temperaturas dentro do quarto e na varanda.

Foto do visor de termômetro que indica a temperatura fora do ambiente - 40°C e dentro do ambiente...

Wed, 17 Jan 2024 16:37:29 -0300

Giac El Vecio

giacelvecio@unio.diversispiritus.net.br

Não é brinquedo não 😲

Indiweb for Dummies

Sun, 07 Jan 2024 21:09:23 -0300 última edição: Sun, 07 Jan 2024 21:09:54 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

𝓒𝓱𝓻𝓲𝓼 escreveu a seguinte publicação Fri, 29 Dec 2023 08:10:55 -0300

Why internet isn't fun anymore?

Mon, 06 Nov 2023 17:51:15 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Why the Internet Isn’t Fun Anymore

The social-media Web as we knew it, a place where we consumed the posts of our fellow-humans and posted in return, appears to be over.

10 motivos porque nossa civilização vai colapsar

Mon, 30 Oct 2023 09:39:54 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Compartilhando por aqui

Mike Macgirvin 🖥️ escreveu a seguinte publicação Sat, 28 Oct 2023 16:58:11 -0300

So... leaving aside that it's completely untrue that we 'wouldn't have got to 8 billion without fertilisers' (we could, we just had multinationals carving up the agri-business telling us otherwise) - this is the most accurate outline I've seen of why we're on the edge of civilisational collapse

essential reading, shared with thanks to Simon Michaux

https://climateactionaustralia.wordpress.com/2023/10/19/10-reasons-our-civilization-will-soon-collapse/

show all 4 comentários

Mon, 30 Oct 2023 16:31:20 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

@Mike Macgirvin 🖥️ I shared your post (your comment about "fertilizer lie" ) and the link to original post, but I just put the translation (in pt_BR )of the original text in the title :-)

I think it's clear that it's a share of shares :-)

Mon, 30 Oct 2023 16:38:02 -0300

Mike Macgirvin 🖥️

mikedev@fediversity.site

That was not my post or comment.

Mon, 30 Oct 2023 18:28:05 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

:-( Hmm... so it really is a bug

A pobreza da conexões

Wed, 18 Oct 2023 18:49:24 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Esse texto foi publicado há mais de 10 anos num blogue (que não existe mais) e ainda continua atual.

Felizmente alguém teve o dom de guardá-lo num arquivo pdf e deixá-lo público!

https://www.inesul.edu.br/professor/arquivos_alunos/doc_1253563303.pdf

Escrita e neutrinos

Mon, 09 Oct 2023 18:41:06 -0300 última edição: Mon, 09 Oct 2023 18:43:18 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

"Penso que o ato de escrever tem muita coisa do neutrino. A gente escreve e vai atravessando os corpos mais densos e opacos possíveis, até encontrar o elemento de colisão. Então, para esse elemento, tudo o que dissemos e que pareceu incompreensível, obscuro, torna-se claro, rutilante." Hilda Hilst

#quote

Sun, 30 Jul 2023 13:36:24 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Sérgio F. de Lima atualizou perfil público, alterando Trabalho/Emprego e Página web.

Sun, 30 Jul 2023 10:49:00 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Sergio F. Lima escreveu a seguinte publicação Sun, 30 Jul 2023 09:17:16 -0300

Saudades

Um dia você está fazendo trilha com a filhota (julho de 2018), em outro está feliz por vê-la realizando o projeto de estudar fora (2023), mas morrendo (apenas metaforicamente) de saudades...

Foto na Pedra da Gávea/RJ onde eu, de camisa vermelha estou ao lado da filhota que sorri para a foto! Ao fundo,a cidade do Rio de Janeiro por trás de uma névoa.

Foto da filhota, numa escada de calça preta e blusa marron, com a torre Eiffel ao fundo. Ela sorri para a foto.

PS: As nossas camisas, em 2018, foram proféticas! Lula não só ficou livre como se tornou, pela terceira vez, Presidente do Brasil e, minha filhota, foi estudar perto da Torre!

#Família #Domingos

Sun, 30 Jul 2023 11:01:59 -0300

Giac El Vecio

giacelvecio@unio.diversispiritus.net.br

O @Alexandre Hannud Abdo talvez esteja perto da Torre também , está sabendo?

Mon, 31 Jul 2023 13:11:48 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Sim. Tô ligado 😏

Mon, 31 Jul 2023 14:56:41 -0300

Giac El Vecio

giacelvecio@unio.diversispiritus.net.br

Consigo ver seu comentário do friendica tb aqui ;)

Dyi

Tue, 25 Jul 2023 19:07:53 -0300

Sérgio F. de Lima

oigreslima6626@hub.vilarejo.pro.br

Sergio F. Lima escreveu a seguinte publicação Tue, 25 Jul 2023 12:28:46 -0300

Tirar roda traseira da moto para colocar "sapatos" novos: 10 minutos.

Montar a roda, já com os novos sapatos: 40 minutos.

Mas minha energia acabou... a roda da frente farei todo o serviço na oficina.

Por que trocar a roda em casa?
1) Treinar para uma real necessidade na estrada.

2) Não é todo borracheiro que sabe sacar a roda traseira da RE Classic 500

#DYI #Motoqueirismo