X-ray absorption study of the ferromagnetic Cu moment at the YBa_(2)Cu_(3)O_(7)/La_(2/3)Ca_(1/3)MnO_(3) interface and variation of its exchange interaction with the Mn moment

With x-ray absorption spectroscopy and polarized neutron reflectometry we studied how the magnetic proximity effect at the interface between the cuprate high-TC superconductor YBa_(2)Cu_(3)O_(7) (YBCO) and the ferromagnet La_(2/3)Ca_(1/3)MnO_(3) (LCMO) is related to the electronic and magnetic properties of the LCMO layers. In particular, we explored how the magnitude of the ferromagnetic Cu moment on the YBCO side depends on the strength of the antiferromagnetic (AF) exchange coupling with the Mn moment on the LCMO side. We found that the Cu moment remains sizable if the AF coupling with the Mn moments is strongly reduced or even entirely suppressed. The ferromagnetic order of the Cu moments thus seems to be intrinsic to the interfacial CuO_(2) planes and related to a weakly ferromagnetic intraplanar exchange interaction. The latter is discussed in terms of the partial occupation of the Cu 3d_(3z^(2)−r^(2)) orbitals, which occurs in the context of the so-called orbital reconstruction of the interfacial Cu ions.

High-Resolution N2 Adsorption Isotherms at 77.4 K: Critical Effect of the He Used During Calibration

Accurate characterization of the microporous structure in porous solids is of paramount importance for several applications such as energy and gas storage, nanoconfinement reactions, and so on. Among the different techniques for precise textural characterization, high-precision gas adsorption measurement of probe molecules at cryogenic temperatures (e.g., N2 at 77.4 K and Ar at 87.3 K) is the most widely used, after appropriate calibration of the sample holder with a probe gas, which does not experience physisorption processes. Although traditionally helium has been considered not to be adsorbed in porous solids at cryogenic temperatures, here we show that even at 77.4 K (high above its boiling temperature, 4 K) the use of He in the calibration step can give rise to erroneous interpretations when narrow micropores/constrictions are present.

Architectural Technology and the BIM Acronym 3: Getting to Grips with BIM

Among Small and Medium Sized Enterprises (SMEs) in particular, the UK Government’s ambitions regarding BIM uptake and diffusion across the construction sector may be tempered by a realpolitik shaped in part by interactions between the industry, Higher Education (HE) and professional practice. That premise also has a global perspective. Building on the previous 2 papers, Architectural technology and the BIM Acronym 1 and 2, this third iteration is a synthesis of research and investigations carried out over a number of years directly related to the practical implementation of BIM and its impact upon BE SMEs. First challenges, risks and potential benefits for SMEs and micros in facing up to the necessity to engage with digital tools in a competitive and volatile marketplace are discussed including tailoring BIM to suit business models, and filtering out achievable BIM outcomes from generic and bespoke aspects of practice. Second the focus is on setting up and managing teams engaging with BIM scenarios, including the role of clients; addresses a range of paradigms including lonely BIM and collaborative working. The significance of taking a whole life view with BIM is investigated including embedding soft landings principles into project planning and realisation. Thirdly procedures for setting up and managing common data environments are identified and the value of achieving smooth information flow is addressed. The overall objective of this paper is to provide SMEs with a practical strategy to develop a toolkit to BIM implementation.

Letter from Edward Wigglesworth to John Lowell, 1781 January 3

Four leaves containing a four-and-a-half-page letter in the hand of Professor Edward Wigglesworth to John Lowell dated January 3, 1781. In the letter, Professor Wigglesworth describes the issues related to the deprecating value of paper money and the salaries of Harvard officers, and he provides recommendations for the General Court's grants to the College.

College Book 3, 1636-1779

This volume was begun by Thomas Danforth, most likely around 1687, and contains transcriptions of donation records, property inventories, College laws, Overseers and Corporation minutes, and other official documents dating from 1636 onwards. By copying these documents into one volume, Danforth brought together a chronicle of Harvard's early history. Some of its content duplicates that of College Book 1, and other entries were copied from sources which no longer exist, including College Book 2, which was destroyed by fire in 1764. Danforth, who served as College Treasurer from 1650 to 1668, as Steward from 1668 to 1682, and again as Treasurer from 1682 to 1683, is believed to have created this volume as a precautionary measure during the great upheaval surrounding the 1684 annulment of the Royal Charter of the Massachusetts Colony and consequent dissolution of the Harvard Corporation. Some scholars believe he created College Book 3 in fear that the College's original records, from which it was largely derived and copied, might be destroyed.

Harvard College Master of Arts diploma of Samuel Mather, 1701 July 3

This diploma was awarded to Samuel Mather on July 3, 1701, when he received an A.M. from Harvard College. It is signed by Increase Mather (then-President of Harvard), Samuel Willard, Henry Flynt, Jabez Fitch, and Nathaniel Saltonstall.

Letter from Samuel Willard, Lancaster, Massachusetts, to Catherine Willard, Petersham, Massachusetts, February 3, 1800

Willard mentions that he spent his vacation in Lancaster, comments on the weather, and asks his family to write more often.

Letter from Samuel Willard, Deerfield, Massachusetts, to Catherine Willard, Petersham, Massachusetts, November 3, 1809

Willard informs his sister that he has sent her the chambray that he bought for her with money she had given to him to make the purchase.