scholarly journals Production of a wave guide for the Defence Research Telecommunications Establishment, Department of National Defence, Shirley Bay, Ontario

1958 ◽  
Author(s):  
W A Pollard ◽  
T E Davis
Keyword(s):  
Wave Guide ◽  
Defence Research ◽  
Department Of National Defence ◽  
National Defence

Holarctic Elements Among the Ichneumoninae of Canada

1956 ◽  
Vol 88 (11) ◽  
pp. 647-652 ◽  
Author(s):  
Gerd H. Heinrich
Keyword(s):  
Department Of Agriculture ◽  
Canada Department ◽  
Defence Research ◽  
Insect Survey ◽  
Department Of National Defence ◽  
National Defence

The fallowing records represent a supplement to my former publication “Holarctic Elements among the Ichneumoninae of Maine” (Jour. Wash. Acad. Science 43. May, 1953, p. 148-50). They are based mainly on material obtained by the Northern Insect Survey, which is a co-operative project of the Canada Department of Agriculture and the Defence Research Board, Canada Department of National Defence.

A Report on Some North American Arctic and Subarctic Ichneumoninae

1956 ◽  
Vol 88 (8) ◽  
pp. 477-487 ◽  
Author(s):  
Gerd H. Heinrich
Keyword(s):  
New Species ◽  
North American ◽  
Department Of Agriculture ◽  
Arctic Species ◽  
Canada Department ◽  
North American Arctic ◽  
Defence Research ◽  
Insect Survey ◽  
Department Of National Defence ◽  
National Defence

The following contribution to our knowledge of the Ichneumoninae of the boreal parts of Canada and of Alaska is based mainly on material obtained by the Northern Insect Survey, which is a co-operative project of the Canada Department of Agriculture and the Defence Research Board, Canada Department of National Defence.The contribution brings forward 12 new species and subspecies 3 of them being represented by both sexes, 9 by the female sex only. Some arctic species already named before or regarded as holarctic elements will be treated in a separate publication.

Thermal analysis of forced-air and thermosyphon cooling systems for the Inuvik airport expansion

1991 ◽  
Vol 28 (3) ◽  
pp. 399-409 ◽  
Author(s):  
L. B. Smith ◽  
J. P. Graham ◽  
J. F. Nixon ◽  
A. S. Washuta
Keyword(s):  
Thermal Analysis ◽  
Natural Convection ◽  
Key Words ◽  
Thermal Analyses ◽  
Cooling Systems ◽  
Air Ventilation ◽  
Forced Air ◽  
Department Of National Defence ◽  
Raft Foundations ◽  
National Defence

This paper presents a description of thermal analyses of forced-air ventilation and thermosyphon cooling systems, which were carried out in connection with the design of the concrete raft foundations that support hangars and other major structures to be constructed by the Department of National Defence adjacent to the existing airport near Inuvik, N.W.T. The cooling systems are required to prevent heat from the buildings from thawing the ice-rich permafrost present below the site. The analyses identified those parameters that have the most significant effect on the efficiency of each system. Based partially on the results of the analyses, it was decided to utilize air ventilation for cooling. The system is expected to perform satisfactorily under natural convection; however, the design includes a provision to install air blowers, if this should prove necessary in the future. A number of areas in which further research appears useful have been identified. Key words: permafrost, thermal analysis, raft foundation, hangar, ventilated slab, natural convection, thermosyphons.

Notes on the Identities and Distributions of Aedes Species of Northern Canada, with a Key to the Females (Diptera: Culicidae)

1954 ◽  
Vol 86 (6) ◽  
pp. 241-255 ◽  
Author(s):  
J. R. Vockeroth
Keyword(s):  
Research Work ◽  
Department Of Agriculture ◽  
Insect Fauna ◽  
Northern Canada ◽  
Adult Females ◽  
Biological Studies ◽  
Insect Survey ◽  
Department Of National Defence ◽  
Taxonomic Studies ◽  
National Defence

In the Northern Insect Survey, sponsored jointly by the Canada Department of Agriculture and the Department of National Defence, the insect fauna of northern Canada was investigated extensively during the summers of 1947-52. The research work has centred on the biting flies and has consisted in large part of taxonomic studies, as a preliminary to biologica1 investigations. In mosquitoes of the genus Aedes, the difficulty of identifying the adult females, particularly those of the black-legged groups, has made biological studies extremely difficult.

New Canadian Black Flies (Diptera: Simuliidae).I

1952 ◽  
Vol 84 (2) ◽  
pp. 33-42 ◽  
Author(s):  
G. E. Shewell
Keyword(s):  
New Species ◽  
Field Studies ◽  
Black Flies ◽  
Medical Entomology ◽  
Valuable Data ◽  
National Defence Research ◽  
Defence Research ◽  
Insect Survey ◽  
Work Done ◽  
National Defence

The following descriptions of new species of black flies are based on material acquired from several sources in the Division of Entomology. The largest collections were made by field parties engaged in the Northern Insect Survey, a project commenced in 1947 and conducted by the Division in co-operation with the National Defence Research Board. Much of the simuliid material accumulated by this survey still remains to he examined and it will be several years before the valuable data on species distribution that it contains can be assembled into a form suitable for publication. Several collections of northern material have also been contributed by officers of the Household and Medical Entomology Unit. The rest of the material is the outcome of rnp own field studies in the Ottawa district, These studies, comnenced in 1949 and still continuing, are on a much smaller scale than the northern work and are designed chiefly to increase my knowledge of the group and to verify or supplement certain aspects of the work done by Twinn (1) in this area.

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