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Ottawa, Canada

The Department of National Defence , commonly abbreviated as DND, is a Canadian government department responsible for defending Canada's interests and values at home and abroad.National Defence is the largest department of the Government of Canada in terms of budget as well as staff. The Department is headed by the Deputy Minister of National Defence, who is the Department’s senior civil servant, and reports directly to the Minister of National Defence. The Department of National Defence exists to aid the minister in carrying out his responsibilities, and acts as the civilian support system for the Canadian Armed Forces. Under the National Defence Act, the Canadian Forces is completely separate and distinct from the Department of National Defence.The Department of National Defence is currently headed by Deputy Minister Richard B. Fadden. Wikipedia.

Chiu S.,Department of National Defence
International Journal of Remote Sensing | Year: 2010

A moving target parameter estimation algorithm based on the fractional Fourier transform (FrFT) in combination with along-track interferometry (ATI) was developed previously for airborne (or flat Earth) geometry. Subtle differences exist in migrating from a flat stationary Earth geometry to a spherical rotating Earth geometry. Factors, such as orbital parameters and spacecraft centripetal acceleration, must be taken into account. In addition, the dynamic antenna squint implemented in the RADARSAT-2 satellite for Earth motion compensation needs to be modelled into the algorithm. This paper derives the spaceborne version (i.e. RADARSAT-2) of the algorithm. A simple two-dimensional (2D) signal model is derived and compared to that of three-dimensional (3D) spherical model to warrant its usage, and the FrFT-ATI algorithm is implemented using the derived 2D signal model. Its effectiveness is demonstrated using simulation data. © Her Majesty the Queen in Right of Canada.

Pant N.,Department of National Defence
Astrophysics and Space Science | Year: 2010

We present three new categories of exact and spherically symmetric Solutions with finite central parameters of the general relativistic field equations. Two well behaved solutions in curvature coordinates first category are being studied extensively. These solutions describe perfect fluid balls with positively finite central pressure, positively finite central density; their ratio is less than one and causality condition is obeyed at the centre. The outmarch of pressure, density, pressure-density ratio and the adiabatic speed of sound is monotonically decreasing for these solutions. Keeping in view of well behaved nature of these solutions, one of the solution (I1) is studied extensively. The solution (I1) gives us wide range of Schwarzschild parameter u (0.138 ≤ u ≤ 0.263), for which the solution is well behaved hence, suitable for modeling of Neutron star. For this solution the mass of Neutron star is maximized with all degree of suitability and by assuming the surface density ρb = 2 × 1014 g/cm3. Corresponding to u = 0.263, the maximum mass of Neutron star comes out to be 3.369 MΘ with linear dimension 37.77 km and central and surface redshifts are 4.858 and 0.4524 respectively.We also study some well known regular solutions (T-4, D-1, D-2, H, A, P) of Einstein's field equations in curvature coordinates with the feature of constant adiabatic sound speed. We have chosen those values of Schwarzschild parameter u for which, these solutions describe perfect fluid balls realistic equations of state. However, except (P) solution, all these solutions have monotonically non-decreasing feature of adiabatic sound speed. Hence (P) solution is having a well behaved model for uniform radial motion of sound. Keeping in view of well behaved nature of the solution for this feature and assuming the surface density; ρb = 2 × 1014 g/cm3, the maximum mass of Neutron star comes out to be 1.34 MΘ with linear dimension 28.74 km. Corresponding central and surface redshifts are 1.002 and 0.1752 respectively. © Springer Science+Business Media B.V. 2010.

Christian M.D.,Department of National Defence | Christian M.D.,University of Toronto
Critical Care Clinics | Year: 2013

Bioterrorism is not only a reality of the times in which we live but bioweapons have been used for centuries. Critical care physicians play a major role in the recognition of and response to a bioterrorism attack. Critical care clinicians must be familiar with the diagnosis and management of the most likely bioterrorism agents, and also be adequately prepared to manage a mass casualty situation. This article reviews the epidemiology, diagnosis, and treatment of the most likely agents of biowarfare and bioterrorism. © 2013.

Xiong D.,Queens University | Liu G.,Queens University | Duncan E.J.S.,Department of National Defence
Langmuir | Year: 2012

A diblock copolymer consisting of a sol-gel-forming block and a fluorinated block was used to coat cotton fabrics, yielding textiles that were highly oil- and water-repellent. The coating procedure was simple. At grafted polymer amounts of as low as 1.0 wt %, water, diodomethane, hexadecane, cooking oil, and pump oil all had contact angles surpassing 150° on the coated cotton fabrics and were readily rolled. The liquids were not drawn into the interfiber space by the coated fabrics. Rather, droplets of the nonvolatile liquids such as cooking oil retained their beaded shapes for months with minimal contact angle changes. When forced into water, the coated fabrics trapped an air or plastron layer and this plastron layer was stable for months. In addition, the coating had high stability against simulated washing, and the mechanical properties were essentially identical to those of uncoated cotton fabrics. © 2012 American Chemical Society.

Bansal R.K.,Department of National Defence
Transport in Porous Media | Year: 2012

This paper analyses the classical problem of transient surface-groundwater interaction in a stream-aquifer system under rather realistic conditions. The downward sloping unconfined aquifer is in contact with a constant water level at one end, and a fully penetrating stream at the other end whose water level is rising at a uniform speed. Furthermore, the aquifer is replenished by a vertical time-varying recharge. Closed form analytical expressions for hydraulic head and flow rate in the aquifer are obtained by solving the linearized Boussinesq equation using Laplace transform method. Effects of aquifer parameters on transient water table and flow rate are illustrated with a numerical example. To assess the efficiency of the linearization method, analytical solutions are compared with numerical solutions of the corresponding non-linear equation. © 2012 Springer Science+Business Media B.V.

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