Monte Carlo study of the XY-model on quasi-periodic lattices

Monte Carlo Simulations were carried out using a nearest neighbour ferromagnetic XYmodel, on both 2-D and 3-D quasi-periodic lattices. In the case of 2-D, both the unfrustrated and frustrated XV-model were studied. For the unfrustrated 2-D XV-model, we have examined the magnetization, specific heat, linear susceptibility, helicity modulus and the derivative of the helicity modulus with respect to inverse temperature. The behaviour of all these quatities point to a Kosterlitz-Thouless transition occuring in temperature range Te == (1.0 -1.05) JlkB and with critical exponents that are consistent with previous results (obtained for crystalline lattices) . However, in the frustrated case, analysis of the spin glass susceptibility and EdwardsAnderson order parameter, in addition to the magnetization, specific heat and linear susceptibility, support a spin glass transition. In the case where the 'thin' rhombus is fully frustrated, a freezing transition occurs at Tf == 0.137 JlkB , which contradicts previous work suggesting the critical dimension of spin glasses to be de > 2 . In the 3-D systems, examination of the magnetization, specific heat and linear susceptibility reveal a conventional second order phase transition. Through a cumulant analysis and finite size scaling, a critical temperature of Te == (2.292 ± 0.003) JI kB and critical exponents of 0:' == 0.03 ± 0.03, f3 == 0.30 ± 0.01 and I == 1.31 ± 0.02 have been obtained.

Project Business: a quasi-experimental study of co- operative interaction between schools and industry

This project is a quasi-experimental study involving eight classrooms in two senior elementary schools in St. Catharines, Ontario which received a Project Business Program and were pre- and post-tested to determine the growth of knowledge acquisition in the area of business concepts. Four classrooms received a Project Business treatment while four classrooms acted as a control. The Project Business Program is sponsored by Junior Achievement of Canada; it occurred during a twelveweek period, February to May 1981, and is run by business consultants who, through Action, Dialogue and Career Exploration, teach children about economics and business related topics. The consultants were matched with teacher co-ordinators in whose classrooms they taught and with whom they discussed field trips, students, lesson planning, etc. The statistical analysis of pre- and post-test means revealed a significant statistical growth in the area of knowledge acquisition on the part of those students who received the Project Business Program. This confirms that Project Business makes a difference. A search of the literature appears to advocate economic programs like Project Business, whfch are broadly based, relevant and processoriented. This program recommends itself as a model for other areas of co-operative curricular interactions and as a bridge to future trends and as a result several fruitful areas of research are suggested.

The annual volunteer and service militia list of Canada, 1st March, 1867 /

At head of title: By Authority.

Laura Secord: a study in Canadian patriotism : being an address delivered before the Canadian Club, of Winnipeg, May 1st, 1907 /

Cover title.

The Gleaner and Niagara Newspaper, January 1st, 1818

The Gleaner and Niagara Newspaper was a weekly paper in the town of Niagara-on-the-Lake that began publication December 4, 1817 and ceased in 1830. This bound volume has been divided by publication dates. Other dates included in the volume are: 1817 December 18 1817 December 25 1818 January 8 1818 January 15 1818 January 22 There is also a letter that was found inside the bound volume written by Andrew Heron on October 1 1817.

Memorandum - Report on operations of 1st Division against St. Mihiel Salient, 1918

A memorandum describing the days leading up to the Battle of Saint-Mihiel. The document describes 1. Statement of Operation, 2. Character of Terrain, 3. Initial Dispositions, 4. Suitability of Formations, 5. How such formations were, or could have been, best adapted to meet the changing conditions of combat and terrain, 6. Employment of Infantry Weapons, 7. Artillery Support, 8. Passage of Obstacles, 9. Passage of Lines, 10. Destruction of Opposition, 11. Fighting in Intermediate Zone, 12. Organization of Ground, 13. Liaison, 14. General Observations.

Interrogation of Prisoner - Heaquarters 1st Division, American Expeditionary Forces, 27 May 1918

A prisoner interrogation report dated 27 May 1918. The report reads: "I. PRISONER X. 1st. Battalion, 272 Res. Rogt., 82d Res. 1. CIRCUMSTANCES OF CAPTURE; Captured, while attempting to raid our trenches, at point 1719 at about 7A.M. 2. INFORMATION OBTAINED FROM PRISONER (a) Between point 1814 and point 175242 the German trenches appear to be held by three companies, each numbering 3 platoons, each platoon numbering about 40 men. Each company has 4 light machine guns in the first lines, these machine guns distributed along the first trench (one of them in particular is located at bond in hostile trench at point 17215 and another at about 17245. Each company, furthermore, has one platoon (weak in numbers) in support in the ravine north of Cantigny. These platoons are in dugouts dug into the side of the hill approximately between points 28215 and 2223. Each of these support platoons has two light machine guns at its disposal. Company commanders dugout is at some point along the line of dugouts occupied by the support platoons. Another company commander's dugout (Co.3) is at point 1815 about 15 meters behind the German trench which runs along the edge of the town of Cantigny. There is a communication trench between the cemetery at 2018 and the front line at 18179. It is believed that there is a machine gun at point 17245 kept in a dugout dug under the road. The reserve battalion is believed to be at a fairly great distance from the front (near Bouillancourt). The prisoner, on the other hand, states that it may have been moved up."

Alberta Price List No. 3., January 1st, 1925

A price list form for the Alberta Liquor Control Board from 1 January 1925. The price list includes "General Information" in regards to permits for individuals and special permits. The alcohol is then listed by category for pricing: Scotch Whisky, Irish Whisky, Rye Whisky, Bourbon Whisky, Rum, Gin, Brandy, Port, Native Wine, Italian (Type) Wines, Sherry, Claret, Burgundy, White Wine, Sparkling Wine, Vermouth, Cocktails, Liqueurs, Champagne, Bitters, Ale and Stout, Chinese Liquors.

Forty-Fourth Report of the Liquor Control Board of Ontario - April 1st, 1969 to March 31st, 1970

A report for 1 April 1969 to 31 March 1970 by the Liquor Control Board of Ontario. The report consists of following: Sales, Winers, Personnel, Stores, Permits, and Financial Statements.

Investigation of Frustrated Quasi-One-Dimensional Quantum Spin-Chain Materials

Copper arsenite CuAs2O4 and Copper antimonite CuSb2O4 are S=1/2 (Cu2+ 3d9 electronic configuration) quasi-one-dimensional quantum spin-chain compounds. Both compounds crystallize with tetragonal structures containing edge sharing CuO6 octahedra chains which experience Jahn-Teller distortions. The basal planes of the octahedra link together to form CuO2 ribbon-chains which harbor Cu2+ spin-chains. These compounds are magnetically frustrated with competing nearest-neighbour and next-nearest-neighbour intrachain spin-exchange interactions. Despite the similarities between CuAs2O4 and CuSb2O4, they exhibit very different magnetic properties. In this thesis work, the physical properties of CuAs2O4 and CuSb2O4 are investigated using a variety of experimental techniques which include x-ray diffraction, magnetic susceptibility measurements, heat capacity measurements, Raman spectroscopy, electron paramagnetic resonance, neutron diffraction, and dielectric capacitance measurements. CuAs2O4 exhibits dominant ferromagnetic nearest-neighbour and weaker antiferromagnetic next-nearest-neighbour intrachain spin-exchange interactions. The ratio of the intrachain interactions amounts to Jnn/Jnnn = -4.1. CuAs2O4 was found to order with a ferromagnetic groundstate below TC = 7.4 K. An extensive physical characterization of the magnetic and structural properties of CuAs2O4 was carried out. Under the effect of hydrostatic pressure, CuAs2O4 was found to undergo a structural phase transition at 9 GPa to a new spin-chain structure. The structural phase transition is accompanied by a severe alteration of the magnetic properties. The high-pressure phase exhibits dominant ferromagnetic next-nearest-neighbour spin-exchange interactions and weaker ferromagnetic nearest-neighbour interactions. The ratio of the intrachain interactions in the high-pressure phase was found to be Jnn/Jnnn = 0.3. Structural and magnetic characterizations under hydrostatic pressure are reported and a relationship between the structural and magnetic properties was established. CuSb2O4 orders antiferromagnetically below TN = 1.8 K with an incommensurate helicoidal magnetic structure. CuSb2O4 is characterized by ferromagnetic nearest-neighbour and antiferromagnetic next-nearest-neighbour spin-exchange interactions with Jnn/Jnnn = -1.8. A (H, T) magnetic phase diagram was constructed using low-temperature magnetization and heat capacity measurements. The resulting phase diagram contains multiple phases as a consequence of the strong intrachain magnetic frustration. Indications of ferroelectricity were observed in the incommensurate antiferromagnetic phase.

Appointment of William Woodruff to be Ensign in the 1st Regiment of Lincoln Militia in the Niagara District

Appointment of William Woodruff to be Ensign in the 1st Regiment of Lincoln Militia in the Niagara District. This is signed by Francis Gore, Lieutenant Governor of the Province of Upper Canada. The document is quite stained and watermarked. The text is not affected, Nov. 5, 1815.

List of the number of loads dredged by Smiley’s Dredge since the 1st of October along the Welland Railway

List of the number of loads dredged by Smiley’s Dredge since the 1st of October along the Welland Railway. This is addressed to S.D. Woodruff and signed by James Woodall of Lock No. 1. There are holes and stains in the document. Text is not affected, Jan. 12, 1859.

Appointment of John B. Parkynn [Parkin] (J.P. Bradley’s brother) to be an Ensign of the 1st Company of the Royal Quebec Volunteers

Appointment of John B. Parkynn [Parkin] (J.P. Bradley’s brother) to be an Ensign of the 1st Company of the Royal Quebec Volunteers. This is signed by the Governor General, the Earl of Gosford and Governor General, Secretary J. Walcott, Nov. 27, 1837.