Phonon spectra and thermodynamic properties of rare gas solids based on empirical and semi-empirical (ab initio) two-body potentials : a comparative study /

We study the phonon dispersion, cohesive and thermal properties of raxe gas solids Ne, Ar, Kr, and Xe, using a variety of potentials obtained from different approaches; such as, fitting to crystal properties, purely ab initio calculations for molecules and dimers or ab initio calculations for solid crystalline phase, a combination of ab initio calculations and fitting to either gas phase data or sohd state properties. We explore whether potentials derived with a certain approaxih have any obvious benefit over the others in reproducing the solid state properties. In particular, we study phonon dispersion, isothermal ajid adiabatic bulk moduli, thermal expansion, and elastic (shear) constants as a function of temperatiue. Anharmonic effects on thermal expansion, specific heat, and bulk moduli have been studied using A^ perturbation theory in the high temperature limit using the neaxest-neighbor central force (nncf) model as developed by Shukla and MacDonald [4]. In our study, we find that potentials based on fitting to the crystal properties have some advantage, particularly for Kr and Xe, in terms of reproducing the thermodynamic properties over an extended range of temperatiures, but agreement with the phonon frequencies with the measured values is not guaranteed. For the lighter element Ne, the LJ potential which is based on fitting to the gas phase data produces best results for the thermodynamic properties; however, the Eggenberger potential for Ne, where the potential is based on combining ab initio quantum chemical calculations and molecular dynamics simulations, produces results that have better agreement with the measured dispersion, and elastic (shear) values. For At, the Morse-type potential, which is based on M0ller-Plesset perturbation theory to fourth order (MP4) ab initio calculations, yields the best results for the thermodynamic properties, elastic (shear) constants, and the phonon dispersion curves.

Perturbing the impulse activity of a single identified neuron augments the formation of long-term memory in a molluscan semi-intact preparation /

The aim of this study was to investigate the neural correlates of operant conditioning in a semi-intact preparation of the pond snail, Lymnaea stagnalis. Lymnaea learns, via operant conditioning, to reduce its aerial respiratory behaviour in response to an aversive tactile stimulus to its open pneumostome. This thesis demonstrates the successful conditioning of na'ive semiintact preparations to show learning in the dish. Furthermore, these conditioned preparations show long-term memory that persists for at least 18 hours. As the neurons that generate this behaviour have been previously identified I can, for the first time, monitor neural activity during both learning and long-term memory consolidation in the same preparation. In particular, I record from the respiratory neuron Right Pedal Dorsal 1 (RPeD 1) which is part of the respiratory central pattern generator. In this study, I demonstrate that preventing RPeDl impulse activity between training sessions reduces the number of sessions needed to produce long-term memory in the present semi-intact preparation.

Some electrical properties of semi-conductor crystals / |nPhyu Phyu Khin. -- 260 St. Catharines, Ont. : [s. n.],

SiC and AtB 12 have been prepared and their resistivities and Hall voltages measured. The resistivities and Hall voltages were measured by the Van der Pauw's method, using spring loaded tungsten contacts. In this method, the major requirement is to have samples of plane parallel surfaces of arbitrary shape with four small contacts at the circumference. Similar measurements were made with a number of SiC crystals obtained from the Norton Research Corporation (Canada)-Ltd., Carolina Aluminum Co., Exolon Co. and Carborundum Co. It was found that resistivity, carrier concentration and mobility of ions depend on the type of impurity. AtB 12 was prepared from the melt containing At and B in the ratio of 4:1. They formed amber-colour pseudo tetragonal crystals. As the crystals obtained were small for electrical measurements, hot pressed lumps have been used to measure their resistivity.

The effects of plants(Typha Latifolia)and root-bed medium on the treatment of domestic sewage within a vertical flow constructed wetland /

The effect that plants {Typha latifolia) as well as root-bed medium physical and chemical characteristics have on the treatment of primary treated domestic wastewater within a vertical flow constructed wetland system was investigated. Five sets of cells, with two cells in each set, were used. Each cell was made of concrete and measured 1 .0 m X 1 .0 m and was 1.3 m deep. Four different root-bed media were tested : Queenston Shale, Fonthill Sand, Niagara Shale and a Michigan Sand. Four of the sets contained plants and a single type of root-bed medium. The influence of plants was tested by operating a Queenston Shale set without plants. Due to budget constraints no replicates were constructed. All of the sets were operated independently and identically for twenty-eight months. Twelve months of data are presented here, collected after 16 months of continuous operation. Root-bed medium type did not influence BOD5 removal. All of the sets consistently met Ontario Ministry of Environment (MOE) requirements (<25 mg/L) for BOD5 throughout the year. The 12 month average BOD5 concentration from all sets with plants was below 2.36 mg/L. All of the sets were within MOE discharge requirements (< 25 mg/L) for suspended solids with set effluent concentrations ranging from 1.53 to 14.80 mg/L. The Queenston Shale and Fonthill Sand media removed the most suspended solids while the Niagara Shale set produced suspended solids. The set containing Fonthill Sand was the only series to meet MOE discharge requirements (< Img/L) for total phosphorus year-round with a twelve month mean effluent concentration of 0.23 mg/L. Year-round all of the root-bed media were well below MOE discharge requirements (< 20mg/L in winter and < 10 mg/L in sumnner) for ammonium. The Queenston Shale and Fonthill Sand sets removed the most total nitrogen. Plants had no effect on total nitrogen removal, but did influence how nitrogen was cycled within the system. Plants increased the removal of suspended solids by 14%, BOD5 by 10% and total phosphorus by 22%. Plants also increased the amount of dissolved oxygen that entered the system. During the plant growing season removal of total phosphorus was better in all sets with plants regardless of media type. The sets containing Queenston Shale and Fonthill Sand media achieved the best results and plants in the Queenston Shale set increased treatment efficiency for every parameter except nitrogen. Vertical flow wetland sewage treatment systems can be designed and built to consistently meet MOE discharge requirements year-round for BOD5, suspended solids, total phosphorus and ammonium. This system Is generally superior to the free water systems and sub-surface horizontal flow systems in cold climate situations.

Boston Patriot Vol. 8 No. 13- October 24, 1812

A semi-weekly paper that began in 1809 and ceased in 1816. Its succeeding title was the Boston Patriot and Morning Advertiser. Publishers included: Everett and Munroe, 1809-Mar. 7, 1810; Isaac Munroe, Mar. 10, 1810-May 1, 1811; Munroe and French, May 4, 1811-1813; D.C. Ballard, 1814-1816. Editor: David Everett, Mar. 10, 1810-Oct. 23, 1811. Topics of interest include: Page 1: announcement of war against Great Britain and the reasons for the war; Page 2: announcement of nomination of war supporter Francis Carr for Congress; Statement of the Senate of Massachusetts in support of the war; 3 accounts of the American attack on Queenston; Page 3: report of the movement of war ships in and out of the port of Boston; news of naval movements by American and British ships; Page 4: advertisement of American and British muskets and swords for sale;

New-England Palladium Vol. XLII No. 49- December 17, 1813

A four page, semi-weekly paper that was published from 1803 to 1814.

New-England Palladium Vol. XLI No. 40- May 18, 1813

A four page, semi-weekly paper that was published from 1803 to 1814.

New-England Palladium Vol. 40 No. 33- October 23, 1812

A four page, semi-weekly paper that was published from 1803 to 1814.

Independent Chronicle Vol. XLVI No. 2476- August 4, 1814

A semi-weekly paper that was published from 1801 to 1817. It was previously called the Independent chronicle and the universal advertiser, and was later the Independent chronicle and Boston patriot (Semiweekly). Publishers were Abijah Adams and Ebenezer Rhoades. Topics of interest in this issue include: Page 1: Proclamation from James Madison pardoning military deserters if they return to military service; announcement to officers and soldiers in the military offering reward for the return of military deserters; U.S. General W. Scott's account of the battle of Chippewa; U.S. General P. B. Porter's account of the battle of Chippewa; Major J. Hindman's account of the battle of Chippewa; news of British war ships attacking and capturing U.S. cargo ships; Page 2: news of a soldier shot for desertion; military news from Erie, Pennsylvania; New York appropriates money to pay troops and build two encampments; James Madison issues orders for state of Rhode Island to raise a militia of 500 troops; U.S. military news from Bermuda; report of the death of Capt. Parker of the U.S. ship Syren; account of the battle of Chippewa and a list of important officers wounded; report of a raft captured that was taking supplies to the British; report of U.S. General Brown being wounded in battle; list of further details of the battle of Chippewa; report of Indian attack near Champlain; news of prisoner exchange and announcement that exchanged prisoners should return to their regiments; listing of the total number of British forces in the U.S.; report of British shipwrecks; Naval news for the Port of Boston; news of various U.S. war ships; Page 4: Marshal's notice announcing a trial for members of a private American ship accused of supplying the British with provisions;

Independent Chronicle Vol. XLVI No. 3477- August 8, 1814

A semi-weekly paper that was published from 1801 to 1817. It was previously called the Independent chronicle and the universal advertiser, and was later the Independent chronicle and Boston patriot (Semiweekly). Publishers were Abijah Adams and Ebenezer Rhoades. Topics of interest in this issue include: Page 1: notice from the U.S. War Department seeking proposals for the supply of rations to troops; account of the battle of Bridgewater; list of important military figures wounded in the battle; news of prisoner exchange; Americans and the British negotiate and new prisoner exchange convention; Page 2: report of more British troops sailing to North America; report of some Indian tribes signing a treaty to fight against the British; report of battle near Detroit; report of militia moving from Fredricksburg, Virginia to Baltimore, Maryland; report of troop numbers and casualties in the battle of Bridgewater; report that Commodore Chauncey has recovered from his illness; news of American Naval forces sailing from Sackett's Harbor; Indian tribes sign peace treaty with U.S.; news of U.S. relations with Indians in the southern U.S.; account of battle of Bridgewater and list of casualties; report of the number of men killed and wounded on both sides in the battle of Chippewa; Page 3: report of surprise attack on the British; news of warship movements in and out of Halifax; frigate Java launched in Baltimore; news of British ship movements; 3 companies of Massachusetts militia arrive at Fort Warren; news of ship movements in and out of the Port of Boston; various Marshal's notices alleging U.S. ships supplying goods to the British;

Independent Chronicle Vol. XLIV No. 3,273- August 24, 1812

A semi-weekly paper that was published from 1801 to 1817. It was previously called the Independent chronicle and the universal advertiser, and was later the Independent chronicle and Boston patriot (Semiweekly). Publishers were Abijah Adams and Ebenezer Rhoades. Topics of interest in this issue include: Page 1: notice from the U.S. War Department seeking proposals for the supply of rations to troops; essay in support of the war; U.S. Secretary of War requests that the Governor of Maryland order 350 militia into active service; statement from the Convention of Republican Delegates in New Jersey in support of the war; statement from U.S. President James Madison in support of the war; statement from Maj. Gen. Isaac Brock to residents of Upper Canada urging their support in the war; U.S. Secretary of war sends 1,500 reinforcement troops to Detroit; Page 2: account from U.S. Gen. Hull of a battle near Fort Malden and news of troops in other areas; editorial against the British alliance with the Indians; letter from a U.S. Officer describing military gains near Detroit; news of U.S. infantry marching from Forts Independence and Warren to Albany, N.Y.; Page 3: news of British cargo ships captured by U.S. ships; 2 reward notices for the return of deserters from the military; report of possible 60 day armistice ratified by James Madison; Page 4: notice to British subjects living in Massachusetts that they must report themselves to the marshall; 2 reward notices for return of deserters from the military;

Independent Chronicle Vol. XLVI No. 3470- July 14, 1814

A semi-weekly paper that was published from 1801 to 1817. It was previously called the Independent chronicle and the universal advertiser, and was later the Independent chronicle and Boston patriot (Semiweekly). Publishers were Abijah Adams and Ebenezer Rhoades. Topics of interest in this issue include: Page 1: report of Independence Day celebration including multiple toasts to the military; Page 2: report of South Carolina militia marching home; report of U.S. schooner Alligator being lost to a tornado in Port Royal; report of 10,000 militia and 2,000 regular Army troops to be used in defense of the District of Columbia and vicinity; report U.S. is to try to raise 100,000 militia for defense; news of British deserters providing information to the U.S.; report of skirmishes along the U.S. coast; statement from U.S. Navy Capt. David Porter stating he had taken possession of Sir Henry Martin's Island; report of British troops burning a militia barracks in Lewiston, N.Y.; 4 accounts of the battle of Chippewa and the taking of Fort Erie; statement from Maj. Gen. Brown in praise of his troops in the battle of Chippewa; copy of General Brown's orders to attack at Fort Erie; essay arguing against U.S. citizens boarding enemy ships; report of peace treaty rumours; Page 3: account of Capt. Porter's capture and subsequent escape from the British; list of American prisoners held on the British ship Nymph; report of British cargo ship captured by U.S. war ship; Proclamation from James Madison pardoning military deserters if they return to military service; announcement to officers and soldiers in the military offering reward for the return of military deserters; Page 4: 2 reward advertisements for return of military deserters;

The Boston Gazette, Vol. 4 No. 25- September 14, 1815

A semi-weekly paper that was published from 1803 to 1816. This issue includes an account of the Battle of Chippawa on Pages 1 and 2 as told by U.S. Captain McDonald.