Optical memory with TNLC devices (1982)

In this paper we describe a twisted nematic liquid crystal (TNLC) device structure with optical feedback capable of bistable operation and optical memory. Its structure is the conventional one as employed in hybrid optical bistability.

Bridge windshield design to avoid aeroelastic phenomena

Since in 1940 the Tacoma Narrows Bridge was destroyed by the wind, aeroelastic instabilities have been recognized as one of the most challenging aspects of bridge design. They can produce long-term fatigue failure through vortex induced vibrations, or sudden collapse through self-excited flutter. These vibrations may also cause discomfort for the users and temporary closure of the bridge. Wind tunnel studies are a very helpful tool to understand these phenomena. By means of them, the critical wind speed at which vortex induced vibration and flutter appear can be precisely determined and the design of the bridge can be reconsidered in the early steps of the process. In this paper, an optimum design of the bridge section is sought. One of the most relevant parameters that influence the stability of a certain deck is the porosity of the barriers. Section model tests have been carried out to find whether an optimum value of the porosity of the barrier exists. This value or range of values must present neither vortex induced vibration nor flutter.

Student notebook of Benjamin Waterhouse: 1776

Volume containing notes taken in 1776 by Benjamin Waterhouse (1754-1846) on medical lectures given in Scotland by University of Edinburgh Professor Andrew Duncan (1744-1828). The lectures focused on pathology, with attention given to secretion, absorption, nutrition, excretion, circulation, and respiration. There are also notes on common medicines and their indications and contraindications, such as emetics, cathartics, diaphoretics, and diuretics.

Mr. Cline's lectures on anatomy & surgery, 1799-1800 (inclusive)

Volume containing notes on the lectures of Henry Cline (1750-1827), a surgeon at St. Thomas's Hospital, London, England, that were kept by American medical student John Collins Warren in 1799 and 1800. The lectures were on topics including blood, blood vessels, absorbents, cellular membranes, and the nerves. There are annotations in pencil in an unknown hand throughout the volume.

[Publications].

Mode of access: Internet.

Annual report (for the year ...) submitted by the executive committee to the trustees on ... /

Report year ends Dec. 31, 1901-1906; ends Sept. 30, 1907-

... Abstract of the treasurer's accounts.

At head of title: Bannatyne club.

Reports by officials.

Latest issue consulted: 1908.

Memoirs of Maximillian de Bethune, Duke of Sully, Prime Minister of Henry the Great ... : to which is annexed the Trial of Francis Ravaillac, for the murder of Henry the Great.

Includes index.

Poems and songs : Scotch and English /

Mode of access: Internet.

The romances of Sir Guy of Warwick, and Rembrun his son;

Printed on large paper. Only fifty copies printed.

Incense Burner

H: 6 57/64 in.; bronze

Incense Burner

Hu Wenming; 6 19/64 in.x 4 17/32 in.x 2 7/16 in.; cast and partially gilt bronze and silver inlay

Report of the trial of the students on the charge of mobbing, rioting, and assault, at the college, on January 11 & 12, 1838.

"Mr. S. M'Gregor was employed to take the evidence and speeches in short-hand."-Notice.

Album of the Scottish Artists' Club.

Each plate accompanied by guard sheet with descriptive letterpress.