E.books: ventajas e implementación

Los e.books, o libros electrónicos, dan respuesta a muchas de las necesidades planteadas en la educación superior del siglo XXI. Suponen restar cierto protagonismo a los libros impresos, que sólo permiten el aprendizaje a través de la lectura y la comprensión, y que son generalmente estáticos y poco interactivos. Por el contrario los libros-plataforma multimedia 2.0 tienen indudables ventajas sobre los convencionales: se pueden acceder desde diversos soportes (ordenador, tablet, smartphone…), son accesibles y utilizables en cualquier momento y en cualquier lugar sin necesidad de trasportarlos físicamente, suponen un ahorro de costes, ya que el coste del libro-plataforma virtual es de un 70 a un 80% más barato que el impreso, contienen útiles archivos que se pueden ver o descargar, contienen enlaces (hipervínculos) a webs externas para ampliar la información, etc. Mediante este trabajo pretendemos explicar las diversas ventajas de los libros virtuales, pero también proponer diversas pautas que puedan ser útiles para su implementación en el aula. Para ello además de una revisión de la literatura sobre el tema se explicará la experiencia que hemos tenido en la elaboración, desarrollo e implementación de un e.book.

Comparison of Lattice-Fluid Binary Parameters For Mixtures and Block Copolymers

The aim of this report is to discuss the method of determination of lattice-fluid binary interaction parameters by comparing well characterized immiscible blends and block copolymers of poly(methyl methacrylate) (PMMA) and poly(ϵ−caprolactone) (PCL). Experimental pressure-volume-temperature (PVT) data in the liquid state were correlated with the Sanchez—Lacombe (SL) equation of state with the scaling parameters for mixtures and copolymers obtained through combination rules of the characteristic parameters for the pure homopolymers. The lattice-fluid binary parameters for energy and volume were higher than those of block copolymers implying that the copolymers were more compatible due to the chemical links between the blocks. Therefore, a common parameter cannot account for both homopolymer blend and block copolymer phase behaviors based on current theory. As we were able to adjust all data of the mixtures with a single set of lattice-binary parameters and all data of the block copolymers with another single set we can conclude that both parameters did not depend on the composition for this system. This characteristic, plus the fact that the additivity law of specific volumes can be suitably applied for this system, allowed us to model the behavior of the immiscible blend with the SL equation of state. In addition, a discussion on the relationship between lattice-fluid binary parameters and the Flory–Huggins interaction parameter obtained from Leibler's theory is presented.

A guide to reading in social ethics and allied subjects: lists of books and articles selected and described for the use of general readers

by teachers in Harvard University.

Lists of books in the Harvard College Library, undated

This folder contains six leaves with undated book and shelf lists.

Catalog of books in the chest sent by Thomas Hollis to Boston, 1720 January 1

This one-page document contains a list of books sent to Increase Mather (1639-1723; Harvard AB 1656) by Captain Chadder on behalf of English Harvard benefactor Thomas Hollis (1659-1731).

II. Benjamin Wadsworth's Index to College Books 1-6, created ca. 1736

This paper-bound index was created by Benjamin Wadsworth, probably around 1736. Although most entries are in his hand, additional entries have been made in other, unidentified hands. It is arranged alphabetically, though the keywords used to alphabetize topics are not always logical or intuitive. Each entry lists the College Book and page number where information on the given topic can be found.

List of books received, Oct. 24, 1763 with 1764 addition

This document also lists volumes donated by a Mr. Bradstreet and Mr. Harris, as well as a list of "books saved [from the 1764 fire] by being borrowed" by individuals named Sewall, Parker, Cushing, Appleton, Brigden, Marsh, Cooke, Bowdoin, and Chardon.

List of books received, October 1, 1766

Notation indicates that books were transported by a Captain Marshall.

List of books received, May 11, 1767(?)

The date of this list is written on the document in pencil, possibly in the hand of John Langdon Sibley. Its source and the reason for its attribution are not currently known.

List of books received, Aug. 15, 1767(?)

The date of this list is written on the document in pencil, possibly in the hand of John Langdon Sibley. Its source and the reason for its attribution are not currently known. Document indicates that books arrived "in the two Boxes marked R. O."

List of books received, September 1768

Document indicates that this shipment of books arrived with Captain Dreason(?).