A comprehensive copper stockpile leach model: background and parameter sensitivity

The design and development of a comprehensive computational model of a copper stockpile leach process is summarized. The computational fluid dynamic software framework PHYSICA+ and various phenomena were used to model transport phenomena, mineral reaction kinetics, bacterial effects, and heat, energy and acid balances for the overall leach process. In this paper, the performance of the model is investigated, in particular its sensitvity to particle size and ore permeability. A combination of literature and laboratory sources was used to parameterize the model. The simulation results from the leach model are compared with closely controlled column pilot scale tests. The main performance characteristics (e.g. copper recovery rate) predicted by the model compare reasonably well with the experimental data and clearly reflect the qualitiative behavior of the process in many respects. The model is used to provide a measure of the sensitivity of ore permeability on leach behavior, and simulation results are examined for several different particle size distributions.

Digital Literacy in Story Spaces

This paper describes a study of digital literacy where the researcher worked with one group of English language arts teacher candidates and one of adolescents, reading and writing hypertext fiction. The findings suggest that the adolescent readers/writers brought a more flexible and multiliterate approach to their digital literacy processes than the teacher candidates.

Una revisión de la Cadena Datos-Información-Conocimiento desde el Pragmatismo de Peirce

La Cadena Datos-Información-Conocimiento (DIC), denominada “Jerarquía de la Información” o “Pirámide del Conocimiento”, es uno de los modelos más importantes en la Gestión de la Información y la Gestión del Conocimiento. Por lo general, la estructuración de la cadena se ha ido definiendo como una arquitectura en la que cada elemento se levanta sobre el elemento inmediatamente inferior; sin embargo no existe un consenso en la definición de los elementos, ni acerca de los procesos que transforman un elemento de un nivel a uno del siguiente nivel. En este artículo se realiza una revisión de la Cadena Datos-Información-Conocimiento examinando las definiciones más relevantes sobre sus elementos y sobre su articulación en la literatura, para sintetizar las acepciones más comunes. Se analizan los elementos de la Cadena DIC desde la semiótica de Peirce; enfoque que nos permite aclarar los significados e identificar las diferencias, las relaciones y los roles que desempeñan en la cadena desde el punto de vista del pragmatismo. Finalmente se propone una definición de la Cadena DIC apoyada en las categorías triádicas de signos y la semiosis ilimitada de Peirce, los niveles de sistemas de signos de Stamper y las metáforas de Zeleny.

Price List - Lawrence A. Wilson Co. Limited, 1916

A price list for Lawrence A. Wilson Co. Limited, 87 James St., Montreal Quebec. It is addressed to The Toronto Hunt, 52 Bay Street, Toronto. There are additional handwritten notes. One of the handwritten notes reads "ck to W. Stephen Haas"

Canada PostCard, 1930

A postcard from Montreal, Quebec postmarked 22 August 1930. The front of the postcard is an illustration of a male on the ground drinking out of several alcohol bottles with a sign marked "Canada". The caption reads "This place is wet and I am drinking it dry".

Marriage Certificate - Joseph Clement and Margaret Duffet

A marriage certificate stating that Joseph Clement and Margaret Duffet were lawfully married according to the Church of England in Montreal, May 9, 1784. The name on the paper appears to be "Margaret Dusalle" and the date appears as "May 7th".

Last Will and Testament - Angus Shaw

Last Will and Testament of Angus Shaw of Montreal. He leaves his possessions to Marjory Shaw, his wife; children of his sister Marion (wife of Duncan McDougall) and his nieces who are daughters of his deceased sister Isabella, May 9, 1809.

Receipt to S.D. Woodruff from Gibb and Co.

Receipt to S.D. Woodruff from Gibb and Co. of Montreal, Merchants, Tailors and Gentlemen’s Haberdashers for a cloth sack coat, July 1876.

Letter to Messrs R. Woodruff from Mackenzie, Gates & Co.

Letter to Messrs. Woodruff and Woodruff of St. Catharines from Thomas Secord of St. Catharines who was applying for the job of a clerk. He states that he would like to make $15 a month plus board, July 31, 1849.

Letter - Clara Cudney to Samuel Woodruff

Letter and envelope addressed to Mr. Samuel Woodruff of St. Catharines. The postmarks are Montreal, Dec. 23, 1892 and St. Catharines, Dec. 29, 1892. Clara Cudney is acknowledging sending the mortgage on the land of her late husband Ezekiel. She says that Baker is still in the house but does not want to rent the barn. She asks if she should keep the rent or pass it on to Mr. Woodruff, Dec. 29, 1892.

Receipt from John Henderson and Co., Manufacturers of Hats, Caps and Furs and dealers in Indian Curiosities

Receipt from John Henderson and Co., Manufacturers of Hats, Caps and Furs and dealers in Indian Curiosities, Montreal for furs and buttons, Oct. 13, 1887.