BC HISTORY
Saved by @Alex1Powell

[Thread] Mobile Launch Platforms are some of my favourite pieces of ground support equipment, so here's a closer look at the Saturn V MLPs with some images from the archive.

 The first MLP began construction in July of 1963. The first image here is from late 1963 shows the construction areas just north of the VAB site for MLPs 1 & 2. The second image is a closer look at one of the MLPs in early 1964.
These two images from early 1964 show part of the mount mechanisms that would support the MLPs as they were constructed. Just the size of these alone starts to put things in to perspective!
As the first tower began to grow taller in May of 1964, the first Crawler Transporter (Image 3 and foreground of image 2) began to take shape.
A view of the launch platform itself as it was still being built in July of 1964. The launch platform covered an area close to half an acre.
The umbilical tower would stand 121.5m (without crane) above the launch platform. These images from July and August 1964. (Check out the cool landscape of all the other launch pads and facilities in the first image!)
The first MLP was topped out in September of 1964.
MLP 2 & 3 were finished in December 1964 and March 1965.
2nd image: "Hundreds of construction workers, community leaders, and NASA and contractor employees were present on April 14, 1965 for a ceremony marking off the "topping off" of the Vehicle Assembly Building."
Crawler Transporter 1 picking up MLP 3 in mid 1965.
At their time the three MLPs were the heaviest portable structures known. I'm not sure what holds this title today, but I'm sure it's impressive!
MLP 3 made its way to LC-39A in March of 1966 for testing which included a water deluge test which can be seen in the last image here.
Service (swing) arm 9 in the transfer aisle of the VAB before and after receiving the White Room. This arm would then be attached to MLP 1.
Images 23 May 1966.
In late May of 1966 a MLP rolled out to LC-39A with the Saturn 500F test vehicle to conduct fit checks before the real Saturn V would take the trip.
If you don't feel small yet, maybe this will change that... I think this *may* be from the rollout of Apollo 4.
The Apollo 4 stack making its way to the launch pad in November 1967.
There is so much more history to these amazing structures post Apollo, but that's for another day. So I'll leave you with this shot from the rollout of Apollo 16 with people for scale 🤓

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Tweeting Historians
Tweeting Historians
@Tweetistorian
Happy Friday! I'm @khowaga, and I'm talking about the social history of medicine and disease in #Egypt. Today's topic is the cholera of 1883. (1/19)

#tweetistorian #twitterstorians #histmed #epitwitter

It goes like this.

According to popular legend, Patient Zero of the 1883 cholera epidemic was a mason in his mid-forties named Ḥassan Nūr-al-Dīn, who lived in the port city of Damietta (34,000 people). (2/19)

Nūr-al-Dīn rarely traveled outside of Damietta, but on the morning of Thursday, June 21, he took the local train to the next major town upriver, Manṣūra (30,000 people) for a weekend trip. The next day, Friday, he began to feel unwell. (3/19)

After a fitful night, he went to the station to return home on Saturday. His condition deteriorated rapidly: on boarding the train he exhibited no symptoms, but by reaching the hamlet of Rās al-Khalīg, about an hour later, he had become violently ill. (4/19)

By the time the train arrived in Damietta, he was so weak that he had to be carried home from the station. He arrived at his house before sunset, died shortly before midnight and was buried promptly the next day, Sunday, June 24. (5/19)
HISTORY
Stephen Moore
Stephen Moore
@smooreBofB1940
1. This is a thread about the Bristol Beaufighter & how it was the most important (if not the absolute ‘best’) heavy fighter of the SWW. Beaufighter origins go back to the Bristol Type 142 ‘Britain First’ built as a publicity stunt for Daily Mail owner Lord Rothermere in 1935.


2. With a top speed of 278mph, this was considerably faster than the Hawker Fury, which could only manage 207mph. A specification for a fast medium bomber was issued for a revised version of the 142M, named the Blenheim.


3. By the time the war started all-metal monoplane fighters had eclipsed the performance of the Blenheim. Serious shortcomings in operational capabilities of all RAF aircraft were revealed during early wartime aerial activity, leading to heavy losses of aircraft & crews.

4. Lack of defensive armament, armour & self-sealing tanks were added to the problems of looming obsolescence. The huge number of aircraft ordered from shadow factories, along with delays to replacement models, kept the Blenheim in the front line much longer than it should have.


5. Fighter Command had 7 Blenheim IF squadrons at the outbreak of war. These were dual purpose day/night units, but by early 1940 were operating primarily as night fighters. The need to provide cover for east coast convoys led to the formation of 4 ‘trade protection’ squadrons.
HISTORY
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Sahil Bloom
Sahil Bloom
@SahilBloom
In 1637, the Dutch Republic erupted into a speculative fever over an unlikely item...the tulip.

Tulip Mania has become a legend synonymous with market euphoria and bubbles. But is this tale all it's cracked up to be?

Who's up for a story?

👇👇👇


1/ The tulip is a spring-blooming flower native to the valleys of the Tien Shan Mountains in Central Asia.

It is believed to have been introduced to Europe in 1554, when an ambassador of the Holy Roman Emperor sent tulip bulbs and seeds to Vienna from the Ottoman Empire.


2/ Tulips gained in popularity as people were attracted to their rich color and ability to grow in sub-optimal conditions.

They soon became a coveted status symbol for the wealthy.

The Semper Augustus, with its colorful, flame-like streaks, was the most desired of them all.


3/ By the early 1600s, the Dutch Republic was entering a golden age.

Many financial innovations popped up during this time - the first stock exchange, for example.

But it was another financial innovation that would propel tulips into historical lore: the futures contract.

4/ As tulips grow slowly and may take several years to bloom, paper contracts were written that entitled the buyer to the future tulips.

These contracts were freely-traded.

So in addition to the physical market for tulip bulbs, a thriving paper market was established.
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people aren\u2019t metaphors
people aren’t metaphor...
@ellen_perleberg
A brief thread on the life, religion, and language of Omar ibn Sa’id, author of the only known Arabic-language autobiography of an enslaved person in the United States.


Omar ibn Sa’id was a Fula man from what is now Senegal. He studied Islamic sciences and mathematics under prominent scholars before his enslavement in 1807 at age 37.

In his autobiography, he writes that he was taken “to a place called Charleston in the Christian language.”

He escaped from his first enslaver, but was recaptured and jailed. He wrote in Arabic on the walls of his cell, attracting the attention of the Governor of North Carolina and his brother, who took Omar to their home, where he remained until his death in 1864.

He continued to write short Arabic theological and philosophical texts through his life - his autobiography in 1831, letters, annotations in his Bible, and passages from the Qur’an.

He converted to Christianity in 1820, but his relationship to Christianity was always ambiguous

He writes more about Jesus after his conversion, but the language he uses is consistent with Islamic views of Jesus - المسيح (Messiah) and سيدنا (our master), but not ربنا, our Lord
HISTORY
Maxim Raginsky
Maxim Raginsky
@mraginsky
In this thread, I will argue that the conventional wisdom that Shannon's information theory is all about syntax and not about semantics stems from superficial reading. On the contrary, even his 1948 BSTJ paper is already concerned with syntax, semantics, *and* pragmatics. 1/14

Of course, it does not help matters that Shannon himself states that "semantic aspects of communication are irrelevant to the engineering problem" of communication on the first page of his paper. But you have to read the entire paper, not just the first page. 2/14

Let's first pin down the notions of syntax, semantics, and pragmatics in the sense of Charles Morris: syntax is about relation of symbols to other symbols, semantics is about their relation to objects, and pragmatics is about their relation to subjects. 3/14

Let's start with pragmatics. The full formulation of Shannon's theory is concerned with the problem of reliable communication of some state of the world over a noisy medium, subject to a fidelity criterion. This is an operationalist, pragmatist concern. 4/14

We may envision the problem where we take an action U contingent on the state of the world X and incur the cost c(X,U). We cannot access the state of the world directly, but must mediate the act of selecting the action through transmission of symbols over a noisy channel. 5/14
HISTORY

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"I really want to break into Product Management"

make products.

"If only someone would tell me how I can get a startup to notice me."

Make Products.

"I guess it's impossible and I'll never break into the industry."

MAKE PRODUCTS.

Courtesy of @edbrisson's wonderful thread on breaking into comics – https://t.co/TgNblNSCBj – here is why the same applies to Product Management, too.


There is no better way of learning the craft of product, or proving your potential to employers, than just doing it.

You do not need anybody's permission. We don't have diplomas, nor doctorates. We can barely agree on a single standard of what a Product Manager is supposed to do.

But – there is at least one blindingly obvious industry consensus – a Product Manager makes Products.

And they don't need to be kept at the exact right temperature, given endless resource, or carefully protected in order to do this.

They find their own way.
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Laurie Voss
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The 2018 State of JavaScript survey is out. They got 20,000 responses and have some delicious, delicious data. I'mma thread in some highlights:

First up: JavaScript flavors. There's TypeScript at 47% adoption, a tad higher than npm's own survey results (which said 46%). npm's survey is coming up again soon and will ask about TypeScript in a lot more detail.


I really, *really* like SoJ's "would not use again" question, which lets people who've abandoned a tech self-identify. This is noticeable in the graph above with Flow users -- 41% of people who've used Flow say they wouldn't use it again.

Now JavaScript frameworks. It's been a full year since npm's survey, so these numbers differ from ours in the directions I expected:
React 65% (vs. 60%)
Vue 29% (vs. 24%)
Ember 5% (vs 4%, I was expecting a bigger rise)

But there's a shocker in here: Angular.


npm's survey had Angular at 40% last year and SoJ has it at either:
- 58% (if you include those who don't want to use it again)
- 24% (if you count only those who like it)
Since npm's question didn't ask if they intend to *continue* using it I think that might explain this.
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A thing which I unironically and enthusiastically believe which is unpopular among smart people of my acquaintance: financial engineering has in the recent past and present contributed substantially to human welfare. We should hope to see more of it.

Maybe more geeks need to meet someone who says “My job is teleporting value across time and space.”

Financial engineering is sort of a squishy term. I don’t primarily mean payments infrastructure or financial rails, although both of those involve substantial engineering.

I mean more “We took a thing and performed some alchemy, and now have a new thing.”

Except instead of alchemy it is generally quite a bit of math, a huge amount of contract law and due diligence, often an impressive amount of ops work, and a dusting of technology that web devs would recognize as such.
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Anu Satheesh 🇮🇳...
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Panniyur Sri Varahamurthy Temple Palakkad, Kerala
#KeralaTemples 🚩

Panniyur Sri Varahamurthy Temple is located in Pattambi Taluk of Palakkad District. This is believed to be the first temple in Kerala, where Prathishta was done by Parasurama

Story says that, Parashurama after


Creating Kerala was doing Tapasya here. But he was disturbed as the land faced turbulence. Parashurama sought Narada’s help, who advised him to pray to Vishnu. Parashurama started praying Maha Vishnu. Finally Maha Vishnu appeared and told to do Prathishta of his Varaha Avatar.


As Earth is saved in Varaha Avatar, this temple is famous to solve land related issues.

Many people conduct Bhoomi puja here, which is very special here. They bring sand from around the temple which is used for pooja and then has to be returned to the same spot 👇


from where it was taken.
It is also believed that Perumthachan, the legedary craftsman has abandoned his tools here.
Om Shri Varaha Murthaye Namah
🙏🕉🙏
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Rudy Havenstein, listening to Nas all day.
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I hate when I learn something new (to me) & stunning about the Jeff Epstein network (h/t MoodyKnowsNada.)

Where to begin?

So our new Secretary of State Anthony Blinken's stepfather, Samuel Pisar, was "longtime lawyer and confidant of...Robert Maxwell," Ghislaine Maxwell's Dad.


"Pisar was one of the last people to speak to Maxwell, by phone, probably an hour before the chairman of Mirror Group Newspapers fell off his luxury yacht the Lady Ghislaine on 5 November, 1991." https://t.co/DAEgchNyTP


OK, so that's just a coincidence. Moving on, Anthony Blinken "attended the prestigious Dalton School in New York City"...wait, what? https://t.co/DnE6AvHmJg

Dalton School...Dalton School...rings a

Oh that's right.

The dad of the U.S. Attorney General under both George W. Bush & Donald Trump, William Barr, was headmaster of the Dalton School.

Donald Barr was also quite a


I'm not going to even mention that Blinken's stepdad Sam Pisar's name was in Epstein's "black book."

Lots of names in that book. I mean, for example, Cuomo, Trump, Clinton, Prince Andrew, Bill Cosby, Woody Allen - all in that book, and their reputations are spotless.
EPSTEIN NETWORK