Francisco T. Barbosa
@tuminha.bsky.social
Dentist + digital tech enthusiast. Founder of Periospot.com 🔬 | Exploring the power of AI & ML to build tools that empower people and enhance everyday tasks.
Celebrating 100 Repos on GitHub. 🎊🍾
November 17, 2025 at 9:56 AM
Celebrating 100 Repos on GitHub. 🎊🍾
The Instagram collapse:
2024: 3-5% average engagement
2025: 0.2% average engagement
Not a single Instagram post in 2025 qualified as "high performing" by my model's standards. The platform changed. The content didn't.
2024: 3-5% average engagement
2025: 0.2% average engagement
Not a single Instagram post in 2025 qualified as "high performing" by my model's standards. The platform changed. The content didn't.
November 3, 2025 at 3:00 AM
The Instagram collapse:
2024: 3-5% average engagement
2025: 0.2% average engagement
Not a single Instagram post in 2025 qualified as "high performing" by my model's standards. The platform changed. The content didn't.
2024: 3-5% average engagement
2025: 0.2% average engagement
Not a single Instagram post in 2025 qualified as "high performing" by my model's standards. The platform changed. The content didn't.
Feature importance was depressing:
has_numbers: 11%
video vs photo: 10%
hashtag_count: 6%
caption_length: 5%
posting_hour: 4%
Even the "best" content features barely matter.
has_numbers: 11%
video vs photo: 10%
hashtag_count: 6%
caption_length: 5%
posting_hour: 4%
Even the "best" content features barely matter.
November 3, 2025 at 3:00 AM
Feature importance was depressing:
has_numbers: 11%
video vs photo: 10%
hashtag_count: 6%
caption_length: 5%
posting_hour: 4%
Even the "best" content features barely matter.
has_numbers: 11%
video vs photo: 10%
hashtag_count: 6%
caption_length: 5%
posting_hour: 4%
Even the "best" content features barely matter.
First red flag: When I included account/platform features, the model hit 0.77 ROC-AUC.
When I removed them to focus on pure content? Dropped to 0.62.
That 20% drop = the entire game.
When I removed them to focus on pure content? Dropped to 0.62.
That 20% drop = the entire game.
November 3, 2025 at 3:00 AM
First red flag: When I included account/platform features, the model hit 0.77 ROC-AUC.
When I removed them to focus on pure content? Dropped to 0.62.
That 20% drop = the entire game.
When I removed them to focus on pure content? Dropped to 0.62.
That 20% drop = the entire game.
Setup: I had posts from X, Instagram, Threads, LinkedIn, Facebook, YouTube. All my @Periospot content.
Built an XGBoost model with every feature I could think of:
Posting time
Hashtags
Caption length
Emojis
Content type
Goal: Predict high-performing posts
Built an XGBoost model with every feature I could think of:
Posting time
Hashtags
Caption length
Emojis
Content type
Goal: Predict high-performing posts
November 3, 2025 at 3:00 AM
Setup: I had posts from X, Instagram, Threads, LinkedIn, Facebook, YouTube. All my @Periospot content.
Built an XGBoost model with every feature I could think of:
Posting time
Hashtags
Caption length
Emojis
Content type
Goal: Predict high-performing posts
Built an XGBoost model with every feature I could think of:
Posting time
Hashtags
Caption length
Emojis
Content type
Goal: Predict high-performing posts
Tried to predict viral posts with machine learning on 5 years of my social media data.
The model failed spectacularly (ROC-AUC 0.62).
That failure taught me more about social media than any success could have.
Here's what 3,745 posts revealed
The model failed spectacularly (ROC-AUC 0.62).
That failure taught me more about social media than any success could have.
Here's what 3,745 posts revealed
November 3, 2025 at 3:00 AM
Tried to predict viral posts with machine learning on 5 years of my social media data.
The model failed spectacularly (ROC-AUC 0.62).
That failure taught me more about social media than any success could have.
Here's what 3,745 posts revealed
The model failed spectacularly (ROC-AUC 0.62).
That failure taught me more about social media than any success could have.
Here's what 3,745 posts revealed
I thought I was upgraded on GitHub, but it’s just Halloween season celebration colors.
November 1, 2025 at 8:55 AM
I thought I was upgraded on GitHub, but it’s just Halloween season celebration colors.
I would sh** my pants if I were there.
September 5, 2025 at 9:30 AM
I would sh** my pants if I were there.
Doesn't matter how many times I see this; it hits me hard every time.
September 4, 2025 at 11:00 PM
Doesn't matter how many times I see this; it hits me hard every time.
I don't know how I could live without @PerplexityComet
Thanks, @RussellKirkDDS, for the codes!
Thanks, @RussellKirkDDS, for the codes!
September 4, 2025 at 3:04 PM
I don't know how I could live without @PerplexityComet
Thanks, @RussellKirkDDS, for the codes!
Thanks, @RussellKirkDDS, for the codes!
I was not aware of this tip to use Grok for proofreading on X 🤯
September 2, 2025 at 1:00 PM
I was not aware of this tip to use Grok for proofreading on X 🤯
Going back to KaVo handpiece after a week with the cheap Amazon turbine
September 1, 2025 at 12:30 PM
Going back to KaVo handpiece after a week with the cheap Amazon turbine
Is this the future?
September 1, 2025 at 2:00 AM
Is this the future?
Oral surgeon friend told me he's going alone to an ortho congress
August 31, 2025 at 3:30 PM
Oral surgeon friend told me he's going alone to an ortho congress
Dental pioneers used to extract teeth with pliers and whiskey. Now they announce completing their 'Advanced Instagram Marketing for Dentists' course using this photo.
August 31, 2025 at 1:00 PM
Dental pioneers used to extract teeth with pliers and whiskey. Now they announce completing their 'Advanced Instagram Marketing for Dentists' course using this photo.
What to expect:
Questions about your goals vs. actions
Deep dive into your excuses
Reality check on your priorities
The advice your best friend is too nice to give
Save this prompt. Use it quarterly.
The truth hurts, but stagnation hurts more.
Questions about your goals vs. actions
Deep dive into your excuses
Reality check on your priorities
The advice your best friend is too nice to give
Save this prompt. Use it quarterly.
The truth hurts, but stagnation hurts more.
August 31, 2025 at 12:00 AM
What to expect:
Questions about your goals vs. actions
Deep dive into your excuses
Reality check on your priorities
The advice your best friend is too nice to give
Save this prompt. Use it quarterly.
The truth hurts, but stagnation hurts more.
Questions about your goals vs. actions
Deep dive into your excuses
Reality check on your priorities
The advice your best friend is too nice to give
Save this prompt. Use it quarterly.
The truth hurts, but stagnation hurts more.
When your friend shows you their new dental practice website they designed themselves
August 30, 2025 at 9:00 PM
When your friend shows you their new dental practice website they designed themselves
We open dozens of chats with GPT… then lose track of the important ones.
My hack: I drop a 🟡 emoji in the chat title so I can instantly spot “work-in-progress” threads.
Would be amazing if @OpenAI added pins, colors, or tags (like Apple’s folder labels) to keep conversations organized.
My hack: I drop a 🟡 emoji in the chat title so I can instantly spot “work-in-progress” threads.
Would be amazing if @OpenAI added pins, colors, or tags (like Apple’s folder labels) to keep conversations organized.
August 28, 2025 at 10:27 AM
We open dozens of chats with GPT… then lose track of the important ones.
My hack: I drop a 🟡 emoji in the chat title so I can instantly spot “work-in-progress” threads.
Would be amazing if @OpenAI added pins, colors, or tags (like Apple’s folder labels) to keep conversations organized.
My hack: I drop a 🟡 emoji in the chat title so I can instantly spot “work-in-progress” threads.
Would be amazing if @OpenAI added pins, colors, or tags (like Apple’s folder labels) to keep conversations organized.
I need to keep pushing. I should commit to at least one commit per day on my GitHub.
August 17, 2025 at 1:00 PM
I need to keep pushing. I should commit to at least one commit per day on my GitHub.
@lovable_dev final boss test
August 16, 2025 at 4:17 PM
@lovable_dev final boss test
We lost access to FOR’s old X account, so we’re rebooting.
Follow the new official handle @Global_FOR_org for evidence‑based implant dentistry, digital workflows, and education.
A RT helps the community find us again. 🙏
Follow the new official handle @Global_FOR_org for evidence‑based implant dentistry, digital workflows, and education.
A RT helps the community find us again. 🙏
August 13, 2025 at 12:59 PM
We lost access to FOR’s old X account, so we’re rebooting.
Follow the new official handle @Global_FOR_org for evidence‑based implant dentistry, digital workflows, and education.
A RT helps the community find us again. 🙏
Follow the new official handle @Global_FOR_org for evidence‑based implant dentistry, digital workflows, and education.
A RT helps the community find us again. 🙏
