WorldCat Identities

Defence Research Establishment Ottawa

Overview
Works: 1,251 works in 2,053 publications in 1 language and 3,019 library holdings
Genres: Periodicals  Observations 
Classifications: U385.C2, 551.4687
Publication Timeline
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Most widely held works about Defence Research Establishment Ottawa
 
Most widely held works by Defence Research Establishment Ottawa
DREO technical note by Ottawa Centre de recherches pour la défense( )

in English and held by 14 WorldCat member libraries worldwide

DREO report by Ottawa Centre de recherches pour la défense( )

in English and held by 13 WorldCat member libraries worldwide

Water regime of Disraeli Fiord, Ellesmere Island by John E Keys( Book )

2 editions published in 1978 in English and held by 10 WorldCat member libraries worldwide

Report of study to explain hydrographic conditions in Disraeli Fiord on north coast of Ellesmere Island, NWT
Stability of clays in dynamic compression by R. N Yong( Book )

2 editions published in 1969 in English and held by 10 WorldCat member libraries worldwide

Winter ice reconnaissance in Nares Strait, 1970-71 by Moira Dunbar( Book )

2 editions published in 1971 in English and held by 9 WorldCat member libraries worldwide

Bundling internet traffic over VBR ATM networks : Canada-Germany research activity( Book )

3 editions published in 1998 in English and held by 8 WorldCat member libraries worldwide

Presents a study of the quality of service requirements of user datagram protocol Internet voice traffic when multiplexed with transmission control protocol data traffic over a transatlantic asynchronous transfer mode (ATM) wide area network and an ATM local area network variable bit rate (VBR) service. The purpose of the investigation was to determine realistic resource reservation requirements when Internet protocol telephony applications are multiplexed with bulk data applications. A series of performance measurement tests were carried out between Ottawa and Germany using a toolset to determine the throughput of the bulk data and voice applications together with the packet loss for the voice applications. Delay variance measurements were also made. The research explores how the bandwidth in ATM networks can be used more efficiently
Motion compensation study : task one report by Defence Research Establishment Ottawa( Book )

4 editions published in 1997 in English and held by 8 WorldCat member libraries worldwide

Summarizes findings of task I of an investigation of motion sensors which could be used to compensate for platform motion during electronic support measures (ESM) experiments. This task identified motion sensors and systems that may be potentially suitable for developing a portable motion compensation system for an experimental ESM system. Both inertial and non-inertial reference measuring systems, including various types of gyroscopes, are considered. Manufacturer specifications are explained and presented in a table. The applicability of some systems for use on ships or aircraft is discussed briefly
DIINS, the next generation CPF navigation system : an overview by J. S Bird( Book )

3 editions published in 1999 in English and held by 7 WorldCat member libraries worldwide

The Canadian Navy has been developing a highly fault tolerant, integrated navigation system for its dual INS equipped frigates for a number of years. The system, called DIINS (Dual Inertial Integrated Navigation System), is now in the final stages of sea trials before being prepared for installation on the vessels. This report provides a high level overview of the system
Noise measurements at Cape Race in support of east coast high frequency surface wave radar by Hank W Leong( Book )

4 editions published in 2000 in English and held by 7 WorldCat member libraries worldwide

In support of the operation of the east coast High Frequency surface wave radar (HFSWR) systems, a continuous measurement of noise and interference data in the frequency band of 3-6 MHz was carried out at Cape Race, Newfoundland between August 1, 1998 and May 10, 2000. A procedure called the 'minimum of median' was developed to estimate the noise factors from the measured data. The results of the estimation are presented in this report. This estimation showed that: (a) nighttime noise power level could be as much as 24.1 dB above daytime noise level; and (b) daytime noise level could be sustained for more than 10 hours during the summer, but only for about 6 hours during the winter. The estimated noise factor was then compared the CCIR noise factor for a quiet site 1. From this comparison, we found that: (a) the daytime noise power level could be as much as 6.08 dB lower than the corresponding CCIR noise level, and (b) the nighttime noise level could be as much as 6.72 dB higher than the corresponding CCIR noise level. The transitions from daytime to nighttime or from nighttime to daytime in the measured and CCIR noise data agreed mostly with each other. One exception was that, in the falls of both 1998 and 1999, the nighttime-to-daytime transition in the measured noise data was about two hours earlier
Radiological air sampling for the Canadian forces : final report for tasking 284761KROL (DSSPM) by D. S Haslip( Book )

2 editions published in 2001 in English and held by 7 WorldCat member libraries worldwide

As part of a study of radiological air sampling methodologies & subsequent methods of data analysis, Defence Research Establishment Ottawa performed a number of experimental trials to demonstrate & test the principles & methods of air sampling. This report reviews the theory of air sampling and presents a protocol for Canadian Forces air sampling & data analysis which could be easily implemented in the field. The procedure uses high-volume air samplers, alpha-beta probes for detection of contaminants on the sampling filter, and gamma-ray spectroscopy for additional sensitivity in some cases. Data analysis approaches are suggested, with appropriate caveats centered on the radioactive background signal from radon and thoron decay products
Design and measurement of a 44.5 GHz PHEMT power amplifier by Scott R McLelland( Book )

2 editions published in 2000 in English and held by 7 WorldCat member libraries worldwide

The work described in this report represents the design phase of a gallium arsenide monolithic microwave integrated circuit power amplifier using pseudomorphic high electron mobility transistors (PHEMTs). The main purpose of the work was to investigate the possible performance of a power amplifier at 44 gigahertz for future application in a phased array antenna system. The design of a two stage amplifier, covering the frequency range 43.5-45.5 gigahertz, is described along with predicted & measured performance results. The final layout of the complete chip is also presented
Prediction of mobility and drawbar-pull in tow-bin tests using cone, vane-cone, and bevameter-type tools by R. N Yong( Book )

1 edition published in 1977 in English and held by 7 WorldCat member libraries worldwide

Distributed network management by David Kidston( Book )

2 editions published in 2000 in English and held by 7 WorldCat member libraries worldwide

This report begins with an introduction of network management & an outline of the problems facing the existing management systems for enterprise networks. Commercial & defence related issues in effective management of the next generation of application traffic are also discussed. The following four main requirements for effective network management are extracted: management must be scalable, adaptable, useful, & collaborative. Scalability is required to handle the increasingly large sizes of contemporary networks. Also, network management systems should be able to adapt to the diversity of network components. New utility at all levels of network management is necessary to handle the traffic requirements of the new kinds of applications. Finally, for networks to co-exist & provide end-to-end management while maintaining local control, some kind of collaboration is needed. It is postulated that a distributed management architecture is best suited to satisfy these requirements. Several network management architectures are reviewed and an overview is presented of existing management related technologies. The report concludes with a comparison of these technologies, a coalition management proposal, and a discussion of several related issues
Comparison of proton, neutron and electron radiation-induced electron traps in N-GaAs epilayers studied by deep level transient spectroscopy by S. M Khanna( Book )

2 editions published in 1999 in English and held by 6 WorldCat member libraries worldwide

This paper compares the deep level transient spectroscopy (DLTS) study of proton radiation-induced defects in molecular beam epitaxy (MBE) n-gallium arsenide (n-GaAs) with that of the defects generated in n-GaAs by high energy electron and neutron radiation. The activation energies, capture cross sections and trap densities with respect to radiation fluence are reported. The trap signatures observed are compared to those reported previously for proton-irradiated vapour phase epitaxy and liquid phase epitaxy GaAs. The detailed structure of the trap previously designated as PR4 by Eisen et al. is also presented. This structure is observed for the first time as two distinct peaks in the DLTS spectra of proton-irradiated MBE n-GaAs corresponding to two bulk traps in GaAs film independent of their position within the film. The results are compared to previous studies of neutron and electron irradiated n-GaAs. The results indicate whether some defect centres are generated by all three types of high energy particles discussed & whether others are radiation-type dependent. The significance of the nature of the irradiating particle and the unirradiated GaAs in the growth of radiation-induced defects is also identified. The research reported is relevant to the estimation of radiation damage to GaAs electronic systems in the space environment
Iceberg detection and tracking using high frequency surface wave radar by Hing C Chan( Book )

3 editions published in 1997 in English and held by 6 WorldCat member libraries worldwide

Describes and reports results from an iceberg surveillance experiment involving multiple sensors, with the objective of evaluating the capabilities of spaceborne synthetic aperture radar and ground-based over-the-horizon radar to detect and track icebergs. The experiment was scheduled to coincide with an overflight of the surveillance area (off the coast of Newfoundland) by the ERS-1 radar satellite. The ground-based sensors were located at Cape Race and Cape Bonavista and involved high frequency surface wave radar. Ground truth data were provided by the satellite and by observation from surface vessels and aircraft. Detailed analysis of the high frequency radar data is presented, demonstrating the potential of the technology for the detection and tracking of icebergs and surface vessels
Contaminated vehicle protection factors for the CF Grizzly by D. S Haslip( Book )

2 editions published in 2001 in English and held by 6 WorldCat member libraries worldwide

This report describes & presents results from a field trial in which the Canadian Forces Grizzly armoured personnel carrier was contaminated with radioactive lanthanum-140 and then decontaminated. Investigators made measurements of radiation dose rates at ten locations inside the contaminated vehicle. The trials allowed calculation of the radiation protection factors for the locations inside the vehicle. The results were also used to test the ability to use data from the Source-in-a-Tube (SIT) simulator (where a cobalt-60 source is pulled through a tube draped over the vehicle)to predict dose rates inside a non-uniformly contaminated vehicle. The measurements provide a thorough characterization of the radiation protection offered by the Grizzly and validate the use of the SIT simulator as a tool for evaluating radiation protection of vehicles
A calibration procedure for an HFSWR receive array by E. K. L Hung( Book )

2 editions published in 2001 in English and held by 6 WorldCat member libraries worldwide

This report contains a description & performance evaluation of the matrix calibration method developed for the receive antenna array in the high frequency surface wave radar (HFSWR) at Cape Race, Newfoundland. The evaluation compares this method with two others: the phase-only calibration method currently used, and an assumed gain-and-phase method that equalizes the complex element output amplitudes of signals in the boresight direction. Criteria compared in the evaluation include accuracy of direction estimates, narrowness of spectral peaks, resolution of closely spaced targets, and signal to interference plus noise ratio threshold for target detection. Based on the results, the report indicates whether & to what degree the maximum detection range of the HFSWR could be increased
Prediction of radiological hazard areas with HPAC by D. S Haslip( Book )

2 editions published in 1999 in English and held by 6 WorldCat member libraries worldwide

In light of concerns over a number of small-scale nuclear or radiological incidents, Defence Research Establishment Ottawa has analyzed the radiation hazards resulting from four reference scenarios using the Hazard Prediction & Assessment Capability (HPAC) software, version 3.0. This paper presents results of simulations using HPAC to predict hazards resulting from the following incidents: an exploded radiological source, with the radioactive material coming from an industry that uses such products (in this case, cesium-137 dispersed by a high explosive); an improvised nuclear device explosion, such as a fission weapon that might be produced by a rogue nation or terrorist; a sabotaged or damaged nuclear reactor; and an accident at a nuclear re-processing facility
A High Arctic summer expedition by R. J Osczevski( Book )

3 editions published in 1991 in English and held by 6 WorldCat member libraries worldwide

The 1989 High Arctic Expedition of the Canada-China Dinosaur Project travelled to Bylot and Ellesmere Islands during July because of the recent discovery of dinosaur fossils on Bylot Island and because of historical references to the existence of large fossilized bones near Ellesmere Island south of the Bay Fiord. The report emphasizes the interactions of daily activities, weather and the clothing being trialled, as well as subjective impressions of the Arctic summer in these locations. The performance of the equipment being trialled and results of measurements of the effect of the low-angle sun on comfort are summarized separately
 
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Alternative Names
Canada Centre de recherches pour la défense Ottawa

Canada. Defence Research Board. Defence Research Establishment Ottawa

Canada Defence Research Establishment Ottawa

Canada. Direction de la recherche et du développement de la défense. Centre de recherches pour la défense Ottawa

Centre de Recherches pour la Défense

Centre de recherches pour la défense Ottawa

Conseil de recherches pour la défense (Canada) Centre de recherches pour la défense Ottawa

CRDO

Defence R&D Canada Defence Research Establishment Ottawa

Defence Research Establishment Ottawa (Canada)

DREO

R et D pour la défense Canada Centre de recherches pour la défense Ottawa

Languages
English (56)