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π List of Assassination Attempts on Adolf Hitler
This is an incomplete list of documented attempts to assassinate Adolf Hitler.
All attempts occurred in the German Reich, except where noted. All attempts involved citizens of the German Reich, except where noted. No fewer than 42 plots have been uncovered by historians. However, the true numbers cannot be accurately determined due to an unknown number of undocumented cases.
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- "List of Assassination Attempts on Adolf Hitler" | 2019-11-06 | 55 Upvotes 30 Comments
π Hebban Olla Vogala
"Hebban olla vogala", sometimes spelled "hebban olla uogala", are the first three words of an 11th-century text fragment written in Old Dutch. The fragment was discovered in 1932 on the flyleaf of a manuscript that was probably made in the abbey of Rochester, Kent and is kept in Oxford. It is usually considered to represent a West Flemish variant of Old Low Franconian.
An often cited poem, it was long believed by many Dutch people to be the only text remaining of Old Dutch. However, experts were already aware of other sources that were then not yet easily accessible. Today, more than 42,000 Old Dutch words and phrases from sources such as the Wachtendonck Psalms and the Leiden Willeram have been discovered, with the oldest definitive source being the Salian Law.
π Cable 1971
Cable 1971, otherwise known as Priority Signal or File 1971 was a high profile and secret military signal communicated in December 1952 between the two main inter-services branches of Pakistanβthe Pakistan Army and the Pakistan Navy. It is notable for the fact that it essentially predicted the separation of Pakistan and Bangladesh and by coincidence its title contained the year in which the separation actually happened, almost 20 years later.
The military cable was directed through the Naval Intelligence and Military Intelligence to ISI sent to its headquarter and came in the wake of reactionary of Basic Principles Committee's first report towards the writing of the first set of the Constitution of Pakistan. The cable was sent by then-Commodore S.M. Ahsan to DG ISI Major-General R. Cawthome on a file coincidentally numbered 1971. The cable discussed the implication of One Unit, religious fanaticism, and the economic parity between the West and East Pakistan that will ultimately result in the division of Pakistan into two different groups.
The Cable's message read as:
- The creation of Committee of Ulema to veto the decisions taken in the House of People on religious matters, gives excess of powers to Ulema over the rights of elected representatives of the people. This gives an impression of Pakistan as being a Theocratic State.
- To recommend that the head of the state should be a Muslim will unnecessarily create suspicions in minds of the minorities in Pakistan. The choice to select the head of the state should be left entirely to the people, to select without prejudice to caste, colour and creed.
- It is maintained by same officers that a single House elected on population basis should have been envisaged, and we should cease to think in terms of Bengalis and Punjabis etc. The parity between West & East Pakistan will ultimately result in the division of Pakistan into two different groups, therefore, it is the very negation of one people, one country and one culture.
The cable's message was further extended and discussed at the Army GHQ by MI's officer Major KM Arif when he compiled an "Intelligence Report No. 7894 of the Office of Intelligence Research and Analysis" in December 1970.
The cable is notable for its highlighted title and many historians found strange that the cable was coincidentally numbered: Cable/File 1971.
Discussed on
- "Cable 1971" | 2019-11-06 | 14 Upvotes 12 Comments
π NCP, the Predecessor of TCP/IP
The Network Control Program (NCP) provided the middle layers of the protocol stack running on host computers of the ARPANET, the predecessor to the modern Internet.
NCP preceded the Transmission Control Protocol (TCP) as a transport layer protocol used during the early ARPANET. NCP was a simplex protocol that utilized two port addresses, establishing two connections, for two-way communications. An odd and an even port were reserved for each application layer application or protocol. The standardization of TCP and UDP reduced the need for the use of two simplex ports for each application down to one duplex port.
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- "NCP, the Predecessor of TCP/IP" | 2019-11-05 | 45 Upvotes 14 Comments
π Photoacoustic Effect
The photoacoustic effect or optoacoustic effect is the formation of sound waves following light absorption in a material sample. In order to obtain this effect the light intensity must vary, either periodically (modulated light) or as a single flash (pulsed light). The photoacoustic effect is quantified by measuring the formed sound (pressure changes) with appropriate detectors, such as microphones or piezoelectric sensors. The time variation of the electric output (current or voltage) from these detectors is the photoacoustic signal. These measurements are useful to determine certain properties of the studied sample. For example, in photoacoustic spectroscopy, the photoacoustic signal is used to obtain the actual absorption of light in either opaque or transparent objects. It is useful for substances in extremely low concentrations, because very strong pulses of light from a laser can be used to increase sensitivity and very narrow wavelengths can be used for specificity. Furthermore, photoacoustic measurements serve as a valuable research tool in the study of the heat evolved in photochemical reactions (see: photochemistry), particularly in the study of photosynthesis.
Most generally, electromagnetic radiation of any kind can give rise to a photoacoustic effect. This includes the whole range of electromagnetic frequencies, from gamma radiation and X-rays to microwave and radio. Still, much of the reported research and applications, utilizing the photoacoustic effect, is concerned with the near ultraviolet/visible and infrared spectral regions.
Discussed on
- "Photoacoustic Effect" | 2019-11-05 | 63 Upvotes 17 Comments
π StanisΕaw Lem
StanisΕaw Herman Lem (Polish:Β [staΛΙ²iswaf ΛlΙm] (listen); 12 or 13 September 1921 β 27 March 2006) was a Polish writer of science fiction, philosophy, and satire. Lem's books have been translated into 41 languages and have sold over 45Β million copies. From the 1950s to 2000s, he published many books, both science fiction and philosophical/futurological. Worldwide, he is best known as the author of the 1961 novel Solaris, which has been made into a feature film three times. In 1976, Theodore Sturgeon wrote that Lem was the most widely read science fiction writer in the world. The total print of Lem's books is over 30 million copies.
Lem's works explore philosophical themes through speculation on technology, the nature of intelligence, the impossibility of communication with and understanding of alien intelligence, despair about human limitations, and humanity's place in the universe. They are sometimes presented as fiction, but others are in the form of essays or philosophical books.
Translating his works is difficult due to passages with elaborate word formation, idiomatic wordplay, alien or robotic poetry, and puns.
Discussed on
- "StanisΕaw Lem" | 2019-11-04 | 82 Upvotes 27 Comments
π Boeing MQ-25 Stingray
The Boeing MQ-25 Stingray is an aerial refueling drone that resulted from the Carrier-Based Aerial-Refueling System (CBARS) program, which grew out of the earlier Unmanned Carrier-Launched Airborne Surveillance and Strike (UCLASS) program. The MQ-25 first flew on 19 September 2019.
Discussed on
- "Boeing MQ-25 Stingray" | 2019-11-01 | 41 Upvotes 65 Comments
π CleanFlicks
CleanFlicks was a company founded in Utah in 2000 that rented and sold commercially-released DVDs and VHS tapes from which they had edited content which the company considered inappropriate for children or that viewers might otherwise find offensive. CleanFlicks removed sexual content, profanity, some references to deity, and some violence from movies, either by muting audio or clipping entire portions of the track.
A group of major film productions studios sued CleanFlicks in 2002, arguing that their service constituted copyright infringement. A 2006 court ruling closed the company. On March 13, 2007, CleanFlicks reopened its website with "Movies You Can Trust." While legally enjoined from offering edited movies, an email sent by the company on that date indicated that they had reviewed "tens of thousands" of movies and compiled over 1000 that meet their "family-friendly criteria" for sale and rent. In January 2013, the CleanFlicks.com website was no longer online.
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- "CleanFlicks" | 2019-10-31 | 51 Upvotes 60 Comments
π Oberon Operating System
The Oberon System is a modular, single-user, single-process, multitasking operating system written in the programming language of the same name. It was originally developed in the late 1980s at ETH ZΓΌrich. The Oberon System has an unconventional visual text user interface instead of a conventional CLI or GUI. This "TUI" was very innovative in its time and influenced the design of the Acme text editor for the Plan 9 from Bell Labs operating system.
The latest version of the Oberon System, Project Oberon 2013, is still maintained by Niklaus Wirth and a number of collaborators but older ETH versions of the Oberon Systems have been orphaned. The Oberon System also evolved into the multi-process, SMP-capable Bluebottle operating system, with a zooming user interface.
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- "Oberon Operating System" | 2019-10-28 | 196 Upvotes 93 Comments
- "Oberon System, an OS Written in Oberon" | 2015-12-25 | 104 Upvotes 40 Comments
π Steam Cannon
A steam cannon is a cannon that launches a projectile using only heat and water, or using a ready supply of high-pressure steam from a boiler. The first steam cannon was designed by Archimedes during the Siege of Syracuse. Leonardo Da Vinci was also known to have designed one (see the Architonnerre).
The early device would consist of a large metal tube, preferably copper due to its high thermal conductivity, which would be placed in a furnace. One end of the tube would be capped and the other loaded with a projectile. Once the tube reached a high enough temperature, a small amount of water would be injected in behind the projectile. In theory, Leonardo da Vinci believed, the water would rapidly expand into vapour, blasting the projectile out the front of the barrel.
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- "Steam Cannon" | 2019-10-28 | 37 Upvotes 24 Comments