Question: Walter Pauk created the note-taking system devised in what decade?

Context paragraphs:
Vaganova method: The Vaganova method is a ballet technique and training system devised by the Russian dancer and pedagogue Agrippina Vaganova (1879–1951).  It was derived from the teachings of the "Premier Maitre de Ballet", Marius Petipa, throughout the late 19th century.  It was Agrippa Vaganova who perfected and cultivated this form of teaching classical ballet and turned it into a viable syllabus.  The method fuses elements of traditional French style from the romantic era with the athleticism and virtuosity of Italian technique.  The training system is designed to involve the whole body in every movement, with equal attention paid to the upper body, legs and feet.  Vaganova believed that this approach increases consciousness of the body, thus creating a harmony of movement and greater expressive range.

1940 Tennessee Volunteers football team: The 1940 Tennessee Volunteers represented the University of Tennessee in the 1940 season.  Playing as a member of the Southeastern Conference (SEC), the team was led by head coach Robert Neyland, in his fourteenth year, and played their home games at Shields-Watkins Field in Knoxville, Tennessee.  They finished the season with a record of ten wins and one loss (10–1 overall, 5–0 in the SEC), as SEC Champions and with a loss against Boston College in the 1941 Sugar Bowl.  This team won the school's second national championship after being recognized as national champion under the Williamson System, a power rating system created by Paul Williamson, a New Orleans geologist, and the Dunkel System, a power index system devised by Dick Dunkel, Sr.

Regularized Inglish: Regularized Inglish is a revised English spelling system devised and advocated by Swedish linguist Axel Wijk, set out in his 1959 book "Regularized English: An investigation into the English spelling reform problem with a new, detailed plan for a possible solution."  Wijk's spelling system is moderate compared to other 20th century reforms.  Instead of replacing current English spelling with, for example, a fully phonetic notation, Wijk's aim was to replace "inconsistencies with more regular equivalents."  Furthermore, certain inconsistencies such as the use of <g> for two separate consonant sounds (as in "gent" and "goat") are preserved, as are <k>, <c> and <qu> for /k/ and <c> and <nowiki> for /s/. </nowiki> The digraph <ph> is abandoned, but <gh> is preserved where used silently: thus "high" but not "rough".  Consequently, "Regularized Inglish" agrees with 90-95% of words spelled using the current English spelling system.

Harvard–Yenching Classification: Alfred Kaiming Chiu (1898–1977) was a pioneer of establishing a library classification system for Chinese language materials in the United States of America.  The system devised by him was known as Harvard–Yenching Classification System.  The system was primarily created for the classification of Chinese language materials in the Harvard–Yenching Library which was founded in 1927 at the Harvard–Yenching Institute.

Cutter Expansive Classification: The Cutter Expansive Classification system is a library classification system devised by Charles Ammi Cutter.  The system was the basis for the top categories of the Library of Congress Classification.

Walter Pauk: Walter Pauk, Cornell University's reading and study center director, is the author of the best-selling "How To Study In College".  Pauk has been lauded as "one of the most influential professors in the field of developmental education and study skills".  He created Cornell Notes.  In 1997, Pauk was recognized for his work with the Pearl Anniversary Award by The College Reading and Learning Association.

Cornell Notes: The Cornell Notes system (also Cornell note-taking system or Cornell method) is a note-taking system devised in the 1950s by Walter Pauk, an education professor at Cornell University.  Pauk advocated its use in his best-selling book "How to Study in College".

Prêt à Voter: Prêt à Voter is an E2E voting system devised by Peter Ryan of the University of Luxembourg.  It aims to provide guarantees of accuracy of the count and ballot privacy that are independent of software, hardware etc.  Assurance of accuracy flows from maximal transparency of the process, consistent with maintaining ballot privacy.  In particular, Prêt à Voter enables voters to confirm that their vote is accurately included in the count whilst avoiding dangers of coercion or vote buying.

Roman Club: Roman Club (Italian: "Fiori Romano" ) is an artificial bridge bidding system devised in the 1950s by Giorgio Belladonna and Walter Avarelli of Italy's Blue Team.  They used it to win twelve WBF World Teams Championships, three Olympiads and numerous European and National titles.  A variant, "Little Roman" or "Arno", was played by their Blue Team-mates Massimo D'Alelio and Camillo Pabis Ticci.

Ranks and insignia of the Confederate States: The ranks and insignia of the Confederate States were a rank insignia system devised by the forces of the Confederate States of America during the American Civil War.  While based on the Union rank system, changes were introduced to differentiate the "gray" from the "blue".

Supporting paragraphs: Walter Pauk Cornell Notes
Answer: 1950s