1/ The “I Have a Dream" speech is one of the most extraordinary speeches in American history. You should read it again. First, a few thoughts about the common American heritage Dr. King relied upon in calling Americans to rededicate themselves to the unfinished work of freedom.

1) The Temple of the Divine Claudius was a vast temple complex on Rome's Caelian Hill, overlooking the valley that would later be occupied by the Colosseum. Though almost nothing now remains of the structure, its scale and grandeur once rivalled anything in the city.. #LostRome

2) The 'Claudium' was intended as a sacred complex to revere Claudius and the imperial cult. Construction began soon after the death and deification of the emperor in 54 AD, initiated by his widow Agrippina who was likely responsible for his supposed death by poisoning. #LostRome

3) The sprawling temple complex sat on a gigantic podium that spread across the Caelian Hill, measuring 180 x 200 metres; with towering retaining walls of travertine that raised the structure 20 metres above the valley below. #LostRome

4) The elevated sacred area was likely entered by steps facing the temple on the west side. The temple itself had a projecting hexastyle porch and was surrounded by gardens and a grand portico, probably the 'porticus Claudia' mentioned in Martial's 'On the Spectacles'. #LostRome

5) Statues of both Agrippina and Claudius’ ill-fated young son Britannicus, sculpted in sumptuous dark Egyptian greywacke, were discovered among the ruins on the Caelian Hill in 1651 – and had almost certainly been displayed in the temple precinct. #LostRome

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)

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.

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