#engineering

[enriquemzn262]

Patria FAMOUS (Future Highly Mobile Augmented Armored Systems) Finnish tracked APC prototype.

[academicfever]

Day 4: A Slow, Rainy, Rejuvenating Day

Solid writing session (60-90 minutes) Reward: hot chocolate and cookies

Read a few research papers Reward: Watch a comedy special

A walk, if the rain allows Reward: Maintain a wonder journal about existence

Read something non-academic Reward: Start a "curiosity journal" where you write down interesting questions

Call home Reward:  Keep a tiny sketchbook for 2-minute doodles

Organize your closet Reward: eat an indulgent snack

Mop the floor Reward: Crank up a favorite song and move freely, even for just 3 minutes.

Cook something simple Reward: Boost endorphins with a brief cold-water burst. 

Journal_mental health check

What are three things you're proud of right now? If you could write a letter to your past self, what would you say? What does your ideal day look like, moment by moment? What are your current non-negotiables in life? What stories are you telling yourself that might not be true? What emotions have been most present for you lately? Describe a recent moment when you felt truly alive. What are you carrying that you're ready to release? Where do you feel most safe? What does your heart need right now?

[adafruit]

Testing Dark Castle with audio on the RP2350 Fruit Jam 🕹️🏰

Jepler spent a bunch of time this week working on getting audio working on the pico-umac port https://github.com/jepler/pico-mac/tree/rp2350-fruitjam to Fruit Jam

. Audio on the hardware we're emulating is pretty straightforward: every scanline of the video generator also pops out one byte of PWM data. We have 370 horizontal lines—352 visible and 18 during the vsync—and a 60.15 Hz refresh rate for 22.255 KHz audio approximately. That data is written to $1FD00 http://www.mac.linux-m68k.org/devel/plushw.php . That data is being piped over I2S to the MAX98357

and to a speaker for now.

So, of course, the first thing we have to try out is Dark Castle

: famous for great audio and being a surprisingly hard game to play! The audio sounds really good though :)

[twilight0wanderer]

Hydraulic elevators (and probably some other kinds too) will also have pits at the bottom with impact absorbers suitable to safely stop an overloaded elevator at maximum possible speed, which actually gets tested (by ramming a max acceleration elevator into it) as part of one level of recurring safety certification.

It is almost impossible to die in an elevator while remaining in its intended operational bounds (at least from the elevator, obviously it's not going to help if you have a heart attack or get stabbed)

[literallymechanical]

Okay so a guy in my solid state physics class was telling us about this muon scanning startup he worked at, GScan, and I'm going insane. I don't work there and I have no stake in the company, financial or otherwise, I just need to tell you about it.

Muons are short-lived subatomic particles, same charge as an electron but ~200 times more massive. On Earth, they're produced by cosmic rays colliding with the upper atmosphere, and they hit the ground at a rate of about ten thousand per minute per square meter.

They're moving extremely fast at ground level, like 0.99 c. So they careen right through matter, deflecting only very slightly around heavy atomic nuclei – they'll penetrate like a hundred meters into solid rock.

What do you do with this continuous shower of deep-penetrating charged particles, constantly blanketing every square inch of the Earth's surface?

(source)

The classic thing is use them to image the inside of massive structures, like we use x-rays to look inside living tissue – except instead of generating them yourself, you just use atmospheric muons. Muon archeology is a whole thing, they've used it to find hidden chambers in pyramids and stuff. Neat!

But this one Estonian company is doing some crazy bullshit and I love it.

Sandwich anything between a pair of portable muon detectors and get full 3D imaging of the interior, with sub-millimeter accuracy, by tracking the minute deflection of muons between them. Samples that are WAY too thick for x-rays, made of literally anything. Just put some muon detectors on some two by fours in a warehouse and call it a day.

You can just. Image anything??? Anything you want?? Completely passively!! Just detectors! No particle source! Put them anywhere. The detectors themselves are a mature technology, the company's tech is in the algorithms they use to get this level of spatial and elemental resolution.

You can detect failures inside cable-reinforced concrete bridges without cutting open the bridges.

Decommissioned Soviet nuclear submarine filled with concrete, with no drawings or documentation, that may or may not have spent fuel canisters in it? And you need to cut it up for storage? Just look at the muons.

One of the wackiest ideas is to put one detector under your bed and one on the ceiling, so you get a full 3D scan of your body every night, passively. I want one.

[staff]

Tumblr’s Core Product Strategy

Here at Tumblr, we’ve been working hard on reorganizing how we work in a bid to gain more users. A larger user base means a more sustainable company, and means we get to stick around and do this thing with you all a bit longer. What follows is the strategy we're using to accomplish the goal of user growth. The @labs group has published a bit already, but this is bigger. We’re publishing it publicly for the first time, in an effort to work more transparently with all of you in the Tumblr community. This strategy provides guidance amid limited resources, allowing our teams to focus on specific key areas to ensure Tumblr’s future.

The Diagnosis

In order for Tumblr to grow, we need to fix the core experience that makes Tumblr a useful place for users. The underlying problem is that Tumblr is not easy to use. Historically, we have expected users to curate their feeds and lean into curating their experience. But this expectation introduces friction to the user experience and only serves a small portion of our audience. 

Tumblr’s competitive advantage lies in its unique content and vibrant communities. As the forerunner of internet culture, Tumblr encompasses a wide range of interests, such as entertainment, art, gaming, fandom, fashion, and music. People come to Tumblr to immerse themselves in this culture, making it essential for us to ensure a seamless connection between people and content. 

To guarantee Tumblr’s continued success, we’ve got to prioritize fostering that seamless connection between people and content. This involves attracting and retaining new users and creators, nurturing their growth, and encouraging frequent engagement with the platform.

Our Guiding Principles

To enhance Tumblr’s usability, we must address these core guiding principles.

Expand the ways new users can discover and sign up for Tumblr.

Provide high-quality content with every app launch.

Facilitate easier user participation in conversations.

Retain and grow our creator base.

Create patterns that encourage users to keep returning to Tumblr.

Improve the platform’s performance, stability, and quality.

Below is a deep dive into each of these principles.

Principle 1: Expand the ways new users can discover and sign up for Tumblr.

Tumblr has a “top of the funnel” issue in converting non-users into engaged logged-in users. We also have not invested in industry standard SEO practices to ensure a robust top of the funnel. The referral traffic that we do get from external sources is dispersed across different pages with inconsistent user experiences, which results in a missed opportunity to convert these users into regular Tumblr users. For example, users from search engines often land on pages within the blog network and blog view—where there isn’t much of a reason to sign up. 

We need to experiment with logged-out tumblr.com to ensure we are capturing the highest potential conversion rate for visitors into sign-ups and log-ins. We might want to explore showing the potential future user the full breadth of content that Tumblr has to offer on our logged-out pages. We want people to be able to easily understand the potential behind Tumblr without having to navigate multiple tabs and pages to figure it out. Our current logged-out explore page does very little to help users understand “what is Tumblr.” which is a missed opportunity to get people excited about joining the site.

Actions & Next Steps

Improving Tumblr’s search engine optimization (SEO) practices to be in line with industry standards.

Experiment with logged out tumblr.com to achieve the highest conversion rate for sign-ups and log-ins, explore ways for visitors to “get” Tumblr and entice them to sign up.

Principle 2: Provide high-quality content with every app launch.

We need to ensure the highest quality user experience by presenting fresh and relevant content tailored to the user’s diverse interests during each session. If the user has a bad content experience, the fault lies with the product.

The default position should always be that the user does not know how to navigate the application. Additionally, we need to ensure that when people search for content related to their interests, it is easily accessible without any confusing limitations or unexpected roadblocks in their journey.

Being a 15-year-old brand is tough because the brand carries the baggage of a person’s preconceived impressions of Tumblr. On average, a user only sees 25 posts per session, so the first 25 posts have to convey the value of Tumblr: it is a vibrant community with lots of untapped potential. We never want to leave the user believing that Tumblr is a place that is stale and not relevant. 

Actions & Next Steps

Deliver great content each time the app is opened.

Make it easier for users to understand where the vibrant communities on Tumblr are. 

Improve our algorithmic ranking capabilities across all feeds. 

Principle 3: Facilitate easier user participation in conversations.

Part of Tumblr’s charm lies in its capacity to showcase the evolution of conversations and the clever remarks found within reblog chains and replies. Engaging in these discussions should be enjoyable and effortless.

Unfortunately, the current way that conversations work on Tumblr across replies and reblogs is confusing for new users. The limitations around engaging with individual reblogs, replies only applying to the original post, and the inability to easily follow threaded conversations make it difficult for users to join the conversation.

Actions & Next Steps

Address the confusion within replies and reblogs.

Improve the conversational posting features around replies and reblogs. 

Allow engagements on individual replies and reblogs.

Make it easier for users to follow the various conversation paths within a reblog thread. 

Remove clutter in the conversation by collapsing reblog threads. 

Explore the feasibility of removing duplicate reblogs within a user’s Following feed. 

Principle 4: Retain and grow our creator base.

Creators are essential to the Tumblr community. However, we haven’t always had a consistent and coordinated effort around retaining, nurturing, and growing our creator base.  

Being a new creator on Tumblr can be intimidating, with a high likelihood of leaving or disappointment upon sharing creations without receiving engagement or feedback. We need to ensure that we have the expected creator tools and foster the rewarding feedback loops that keep creators around and enable them to thrive.

The lack of feedback stems from the outdated decision to only show content from followed blogs on the main dashboard feed (“Following”), perpetuating a cycle where popular blogs continue to gain more visibility at the expense of helping new creators. To address this, we need to prioritize supporting and nurturing the growth of new creators on the platform.

It is also imperative that creators, like everyone on Tumblr, feel safe and in control of their experience. Whether it be an ask from the community or engagement on a post, being successful on Tumblr should never feel like a punishing experience.

Actions & Next Steps

Get creators’ new content in front of people who are interested in it. 

Improve the feedback loop for creators, incentivizing them to continue posting.

Build mechanisms to protect creators from being spammed by notifications when they go viral.

Expand ways to co-create content, such as by adding the capability to embed Tumblr links in posts.

Principle 5: Create patterns that encourage users to keep returning to Tumblr.

Push notifications and emails are essential tools to increase user engagement, improve user retention, and facilitate content discovery. Our strategy of reaching out to you, the user, should be well-coordinated across product, commercial, and marketing teams.

Our messaging strategy needs to be personalized and adapt to a user’s shifting interests. Our messages should keep users in the know on the latest activity in their community, as well as keeping Tumblr top of mind as the place to go for witty takes and remixes of the latest shows and real-life events.  

Most importantly, our messages should be thoughtful and should never come across as spammy.  

Actions & Next Steps

Conduct an audit of our messaging strategy.

Address the issue of notifications getting too noisy; throttle, collapse or mute notifications where necessary.  

Identify opportunities for personalization within our email messages. 

Test what the right daily push notification limit is. 

Send emails when a user has push notifications switched off.

Principle 6: Performance, stability and quality.

The stability and performance of our mobile apps have declined. There is a large backlog of production issues, with more bugs created than resolved over the last 300 days. If this continues, roughly one new unresolved production issue will be created every two days. Apps and backend systems that work well and don't crash are the foundation of a great Tumblr experience. Improving performance, stability, and quality will help us achieve sustainable operations for Tumblr.

Improve performance and stability: deliver crash-free, responsive, and fast-loading apps on Android, iOS, and web.

Improve quality: deliver the highest quality Tumblr experience to our users. 

Move faster: provide APIs and services to unblock core product initiatives and launch new features coming out of Labs.

Conclusion

Our mission has always been to empower the world’s creators. We are wholly committed to ensuring Tumblr evolves in a way that supports our current users while improving areas that attract new creators, artists, and users. You deserve a digital home that works for you. You deserve the best tools and features to connect with your communities on a platform that prioritizes the easy discoverability of high-quality content. This is an invigorating time for Tumblr, and we couldn’t be more excited about our current strategy.

[nasa]

Nora AlMatrooshi

Nora AlMatrooshi, the first Emirati woman astronaut, worked as a piping engineer before becoming an astronaut candidate for the United Arab Emirates. https://mbrsc.ae/team/nora/

Make sure to follow us on Tumblr for your regular dose of space!

[negativefeedback-teen]

[cat-cosplay]

It's called Engineering. Not Miracles R' Us.

[retropopcult]

Engineer Karen Leadlay working on the analog computers in the space division of General Dynamics, 1964.

[manyphasedgod]

[tobascoart]

Engineering meme

[caitlinjohns77]

[academicfever]

71/100

I've bad period cramps today... couldn't go to uni... I gotta be honest here... not everyday will be 10/10... we will have these days and its ok. accepting a not so productive day when ur body is barely surviving is more than ok! sending love and warmth to all my perfectionist girlies out there!

Log: 17th Feb 2025 running wild

Read Ministry of Time

Journal_mental health check

Gentle stretching and long shower

Protein rich brunch

Studied Gradient Descent __2P

Loss function __2P

Language P

called home

watched Run Jin Variety Show Extravaganza

Note to self: No self-hatred is allowed! u r doing what u can!