Quarters One : the United States Army Chief of Staff's residence, Fort Myer, Virginia /

First printed 1981.

Map of Fort Myer, Va. and vicinity /

Relief shown by hachures.

The history of Fort Myer Virginia.

"100th anniversary issue (special centennial edition of the Fort Myer post)."

Fort Myer and vicinity /

Pen-and-ink and watercolor.

Curved jet flows. Prepared for U. S. Army Aviation Materiel Laboratories, Fort Eustis, Va. Task 1D121401A14203, Contract DA44-177-AMC-238 (T)

Photocopy.

The Old Guard Museum.

Mode of access: Internet.

Density functional energy decomposition into one- and two-atom contributions

The present work provides a generalization of Mayer's energy decomposition for the density-functional theory (DFT) case. It is shown that one- and two-atom Hartree-Fock energy components in Mayer's approach can be represented as an action of a one-atom potential VA on a one-atom density ρ A or ρ B. To treat the exchange-correlation term in the DFT energy expression in a similar way, the exchange-correlation energy density per electron is expanded into a linear combination of basis functions. Calculations carried out for a number of density functionals demonstrate that the DFT and Hartree-Fock two-atom energies agree to a reasonable extent with each other. The two-atom energies for strong covalent bonds are within the range of typical bond dissociation energies and are therefore a convenient computational tool for assessment of individual bond strength in polyatomic molecules. For nonspecific nonbonding interactions, the two-atom energies are low. They can be either repulsive or slightly attractive, but the DFT results more frequently yield small attractive values compared to the Hartree-Fock case. The hydrogen bond in the water dimer is calculated to be between the strong covalent and nonbonding interactions on the energy scale

Shock tube studies of the effects of sharp-rising, long-duration overpressures on biological systems /

Shock tubes have been used successfully by a number of investigators to study the biological effects of variations in environmental pressures (1,2,3). Recently an unusually versatile laboratory pressurization source became available with the capability of consistently reproducing a wide variety of pressure-time phenomena of durations equal to and well beyond those associated with the detonation of nuclear devices (4). Thus it became possible to supplement costly full-scale field research in blast biology carried out at the Nevada Test Site (5,6) by using an economical yet realistic laboratory tool. In one exploratory study employing pressure pulses of 5 to 10 sec duration wherein the times to max overpressure and the magnitudes of the overpressures were varied, a relatively high tolerance of biological media to pressures well over 150 psi was demonstrated (7). In contrast, the present paper will describe the relatively high biological susceptibility to long duration overpressures in which the pressure rises occurred in single and double fast-rising steps.

The Casemate Museum, Fort Monroe, Virginia.

Mode of access: Internet.

Fortress Monroe, Old Point Comfort, and Hygeia Hotel, Va. /

"Entered according to Act of Congress in the year 1861 by E. Sachse & Co. in the Clerks Office of the District Court of Maryland."

Whales and Sonar: Environmental Exemptions for the Navy's Mid-Frequency Active Sonar Training.

Mid-frequency active (MFA) sonar emits pulses of sound from an underwater transmitter to help determine the size, distance, and speed of objects. The sound waves bounce off objects and reflect back to underwater acoustic receivers as an echo. MFA sonar has been used since World War II, and the Navy indicates it is the only reliable way to track submarines, especially more recently designed submarines that operate more quietly, making them more difficult to detect. Scientists have asserted that sonar may harm certain marine mammals under certain conditions, especially beaked whales. Depending on the exposure, they believe that sonar may damage the ears of the mammals, causing hemorrhaging and/or disorientation. The Navy agrees that the sonar may harm some marine mammals, but says it has taken protective measures so that animals are not harmed. (PDF contains 20 pages)

Letter - E.C. Schmon to Arthur A. Schmon, 16 January 1918

The letter begins with some confusion as to whether Arthur is returning to the United States. Eleanore Celeste then mentions a benefit concert she was taken to by Mr. and Mrs. Mezger. She mentions she enjoyed the voice of Florence Mulford Hunt. There was also an address by Professor Talcott Williams of Columbia University. Included is an brief death notice from the paper that reads "Fenton, Colonel, Charles W. commandant at Fort Myer, and head of the two camps which turned out national army officers, died today of meningitis". The second part of the letter mentions "dearest, it is a perfect shame that none of you are to be promoted" and "I never heard of anything as unfair, as making D.J. Harris and Jackie Barrett 1st Lieutenants". She then writes out the sonnet "What is Love?" The letter is labelled number 43.

Floating breakwater field experience, West Coast /

Mode of access: Internet.

Bank erosion control with vegetation, San Francisco Bay, California /

Cover title.