Engineering and technology

Francis Poulenc

Francis Jean Marcel Poulenc (French: [fʁɑ̃sis ʒɑ̃ maʁsɛl pulɛ̃k]; 7 January 1899 – 30 January 1963) was a French composer and pianist. His compositions include songs, solo piano works, chamber music, choral pieces, operas, ballets, and orchestral concert music. Among the best-known are the piano suite Trois mouvements perpétuels (1919), the ballet Les biches (1923), the Concert champêtre (1928) for harpsichord and orchestra, the Organ Concerto (1938), the opera Dialogues des Carmélites (1957), and the Gloria (1959) for soprano, choir and orchestra.

As the only son of a prosperous manufacturer Poulenc was expected to follow his father into the family firm, and he was not allowed to enrol at a music college. Largely self-educated musically, he studied with the pianist Ricardo Viñes, who became his mentor after the composer’s parents died. Poulenc also made the acquaintance of Erik Satie, under whose tutelage he became one of a group of young composers known collectively as Les Six. In his early works Poulenc became known for his high spirits and irreverence. During the 1930s a much more serious side to his nature emerged, particularly in the religious music he composed from 1936 onwards, which he alternated with his more light-hearted works.

In addition to composing, Poulenc was an accomplished pianist. He was particularly celebrated for his performing partnerships with the baritone Pierre Bernac (who also advised him in vocal writing) and the soprano Denise Duval, touring in Europe and America with each, and making many recordings. He was among the first composers to see the importance of the gramophone, and he recorded extensively from 1928 onwards.

In his later years, and for decades after his death, Poulenc had a reputation, particularly in his native country, as a humorous, lightweight composer, and his religious music was often overlooked. During the 21st century more attention has been given to his serious works, with many new productions of Dialogues des Carmélites and La voix humaine worldwide, and numerous live and recorded performances of his songs and choral music.

https://en.wikipedia.org/wiki/Francis_Poulenc

I7 4790K PCIe Lanes – CPUs, Motherboards, and Memory – Linus Tech Tips

Hi, I have a I7 4790K and a Gigibyte Z97 Gaming GT with 4 PCI 3.0 x16 slots that are able to run all at the same time in x8 mode.   I’m kind of newbie with PCIe lanes.   How can the CPU with 16 lanes support 32 lanes plus any PCIe x1 slots.   Also, how can if it’s using another chip-set to get additional lanes, how to I check to make sure that my GPUs are using the CPU lanes.

Source: I7 4790K PCIe Lanes – CPUs, Motherboards, and Memory – Linus Tech Tips

DuckDuckGo

DuckDuckGo (DDG) is an internet search engine that emphasizes protecting searchers’ privacy and avoiding the filter bubble of personalized search results. DuckDuckGo distinguishes itself from other search engines by not profiling its users and by showing all users the same search results for a given search term. It emphasizes returning the best results, rather than the most results, generating those results from over 400 individual sources, including crowdsourced sites such as Wikipedia, and other search engines like Bing, Yahoo!, and Yandex. As of October 2019, it had 47,225,192 daily searches on average.

The company is based in Paoli, Pennsylvania, in Greater Philadelphia, and has 67 employees as of July 2019. The company name is a reference to the children’s game duck, duck, goose.

Some of DuckDuckGo’s source code is free software hosted at GitHub under the Apache 2.0 License, but the core is proprietary. The company registered the domain name ddg.gg on February 22, 2011, and acquired duck.com on December 12, 2018, which are used as shortened URL aliases that redirect to duckduckgo.com.

https://en.wikipedia.org/wiki/DuckDuckGo

PureOS

PureOS is a Linux distribution focusing on privacy and security, using the GNOME desktop environment. It is maintained by Purism for use in the company’s Librem laptop computers as well as the Librem 5 smartphone.

PureOS is designed to include only free/libre and open-source software (FOSS/FLOSS), and is included in the list of Free GNU/Linux distributions published by the Free Software Foundation.

PureOS is a Debian-based GNU/Linux distribution, merging open-source software packages from the Debian “testing” main archive using a rolling release model. The default web browser in PureOS is called PureBrowser, a variant of Firefox focusing on privacy. The default search engine in PureBrowser is DuckDuckGo.

The PureOS version released in September 2019 is called PureOS 9.0 Hephaestus.

https://en.wikipedia.org/wiki/PureOS

Mathematics – MoodleDocs

Equation Construction and Display

Tools

There are a variety of tools that are available for the purpose of constructing equations, providing text expressions that can be converted to equations, and displaying equations.

The most common text expression syntax is LaTeX or a derivative with probably the most common form of display being a conversion of the equation to an image file. However, is demonstrated with ASCIIMathML simple text expressions can now be be converted to MathML on the fly.

Some tools for creating and displaying equations on-line that may be of interest to those teaching mathematics are:

  • Moodle offers in core a basic TeX filter and an Algebra filter. These are simple but not simplistic. An overview of using these tools can be found at the Using TeX Notation pages. Be aware that these packages are subsets of complete TeX packages and the conventions used are designed more for ease of use within Moodle rather than as complete TeX packages.
  • ASCIIMathML, which both converts equations into MathML on the fly and provides a text expression syntax more easily mastered than Tex, though the filter will convert TeX expressions as well. The ASCIIMathML 2.0.2 zip provides all the files necessary for setting ASCIIMathML up as a Moodle filter as well creating run-time graphs with ASCIIsvg. An on-line calculator is also included. Just recently an ASCIIMathML export format for DragMath was added to version 0.7.2, available here, so that you have access to both a GUI and text expression syntax for creating and displaying equations. Quick and GIFless. ASciencePad is also available and consists of htmlarea enhanced with the ASCIIMathML functionality.
  • Tim Hunt’s Moodle MathTran Module converts Tex into images on the fly. You can also use mathtran_img.js on a page by page basis.
  • The jsMath filter, which does a similar job but using Javascript on the user’s computer
  • MathJax_filter, a next generation for jsMath from David Cervone et al that now includes MathML and web font features: [1] A discussion regarding deploying the beta release can be found here: [2]
  • Calculated question type
  • DragMath equation editor, a WYSIWYG equation editor that integrates easily with the Moodle HTML editor.
  • WIRIS, is a suite of math and science tools. www.wiris.com/moodle/
    • MathType, an equation editor that allows you to type or handwritte math expressions. Based on MathML and a Javascript interface.
    • Wiris Quizzes, a set of question types for math and science topics
  • MathML polyfill support (for Chrome) implementation using custom elements [3] (can be added to Moodle via theme custom HTML)

Mathematics teachers may also be interested to follow the work of York University Maths department, who are working on some projects to augment Moodle, particularly its Quiz module for online assessment, for example by integrating a system which is able to mark algebraic and trigonometric answers to open-ended questions

Source: Mathematics – MoodleDocs