GIER: A Danish computer from 1961 with a role in the modern revolution of astronomy

A Danish computer, GIER, from 1961 played a vital role in the development of a new method for astrometric measurement. This method, photon counting astrometry, ultimately led to two satellites with a significant role in the modern revolution of astronomy. A GIER was installed at the Hamburg Observatory in 1964 where it was used to implement the entirely new method for the measurement of stellar positions by means of a meridian circle, then the fundamental instrument of astrometry. An expedition to Perth in Western Australia with the instrument and the computer was a success. This method was also implemented in space in the first ever astrometric satellite Hipparcos launched by ESA in 1989. The Hipparcos results published in 1997 revolutionized astrometry with an impact in all branches of astronomy from the solar system and stellar structure to cosmic distances and the dynamics of the Milky Way. In turn, the results paved the way for a successor, the one million times more powerful Gaia astrometry satellite launched by ESA in 2013. Preparations for a Gaia successor in twenty years are making progress.Comment: 19 pages,8 figures, Accepted for publication in Nuncius Hamburgensis, Volume 2

The Ohio State University Computer Center: Centennial History

Prepared for the Centennial of The Ohio State University

The application of data processing in small business

Thesis (M.B.A)--Boston Universit

The design of a drum memory system

Three methods for obtaining an auxiliary memory for an SCC-650 (Scientific Control Corporation) digital computer are presented. A logic design is then developed on the basis of using the drum and write circuits from an available IBM-650 digital computer and constructing the remaining logic functions. The results of the logic design are the transfer equations necessary to implement the memory system --Abstract, page ii

Tecnología en la Enseñanza del Inglés

Documento PDF, 25 páginasGuía de estudio para el curso Tecnología en la enseñanza del inglés, código 5180, del Programa Diplomado, Bachillerato y Licenciatura en Enseñanza del Inglés para I y II ciclos que imparte la UNED.Universidad Estatal a Distancia de Costa Ric

On the Evolution to PAPA

A narrative account of the origins and evolution of PAPA

Project Whirlwind summary report no. 50, second quarter 1957

Includes: review and problem index, current problems arranged according to field of application, current problems arranged according to the mathematics involved; Whirlwind coding and applications, introduction and progress reports; academic, introduction, Electronic Computational Laboratory - 6,538, 6.538 - term papers performed during the Spring Term 1957, the M.I.T. Computation Center, and summary of student enrollment statistics; appendices, systems engineering, visitors, publications, and personnel on the project.In-depth review of the second quarter of 1957 for Project Whirlwind