scholarly journals The Ninth Eurasian Symposium on Strength and Service Life at Low Temperature, dedicated to 50th Anniversary of V.P. Larionov Institute of Physico-Technical Problems of the North

2020 ◽  
Vol 30 ◽  
pp. 224-231
Author(s):  
Valeriy Lepov ◽  
Mikhail Lebedev ◽  
Nikolay Petrov
Keyword(s):  
Low Temperature ◽  
Service Life ◽  
50Th Anniversary ◽  
Technical Problems ◽  
The North

scholarly journals Water supply and sewage disposal in permafrost areas of northern Canada

Polar Record ◽  
1959 ◽  
Vol 9 (62) ◽  
pp. 421-432 ◽  
Author(s):  
H. B. Dickens
Keyword(s):  
Low Temperature ◽  
Water Supply ◽  
Operating Costs ◽  
Construction Costs ◽  
Sewage Disposal ◽  
Technical Problems ◽  
Northern Canada ◽  
The North ◽  
Physical Features ◽  
Economic Considerations

Although the principles of water supply and sewage disposal in the north of Canada are the same as those for more temperate regions, the physical features of the installations often vary with the influence of low temperature and permafrost. These not only create technical problems of design but, when coupled with the relative isolation of most northern sites, they also introduce serious economic considerations. Operating costs as well as initial construction costs are higher, making facilities of the kind normally provided too expensive for many people.

Gendered Places and Depositional Histories: Reconstructing a Menstrual Lodge in the Interior Northwest

2019 ◽  
Vol 84 (3) ◽  
pp. 400-419 ◽  
Author(s):  
Molly Carney ◽  
Jade d'Alpoim Guedes ◽  
Kevin J. Lyons ◽  
Melissa Goodman Elgar
Keyword(s):  
Low Temperature ◽  
Pacific Northwest ◽  
Thin Section ◽  
Archaeological Record ◽  
Columbia Plateau ◽  
The North ◽  
Plant Remains ◽  
History Of ◽  
Experimental Firing ◽  
River Inundation

This project considered the deposition history of a burned structure located on the Kalispel Tribe of Indians ancestral lands at the Flying Goose site in northeastern Washington. Excavation of the structure revealed stratified deposits that do not conform to established Columbia Plateau architectural types. The small size, location, and absence of artifacts lead us to hypothesize that this site was once a non-domestic structure. We tested this hypothesis with paleoethnobotanical, bulk geoarchaeological, thin section, and experimental firing data to deduce the structural remains and the post-occupation sequence. The structure burned at a relatively low temperature, was buried soon afterward with imported rubified sediment, and was exposed to seasonal river inundation. Subsequently, a second fire consumed a unique assemblage of plant remains. Drawing on recent approaches to structured deposition and historic processes, we incorporate ethnography to argue that this structure was a menstrual lodge. These structures are common in ethnographic descriptions, although no menstrual lodges have been positively identified in the archaeological record of the North American Pacific Northwest. This interpretation is important to understanding the development and time depth of gendered practices of Interior Northwest groups.

scholarly journals Low-temperature thermochronologic signature of range-divide migration and breaching in the North Cascades

Lithosphere ◽  
2014 ◽  
Vol 6 (6) ◽  
pp. 473-482 ◽  
Author(s):  
Thibaud Simon-Labric ◽  
Gilles Y. Brocard ◽  
Christian Teyssier ◽  
Peter A. van der Beek ◽  
Peter W. Reiners ◽  
...  
Keyword(s):  
Low Temperature ◽  
North Cascades ◽  
The North

scholarly journals ANÁLISE PETROGRÁFICA DOS IGNIMBRITOS BEM PRESERVADOS DA FORMAÇÃO CACHOEIRA DA ILHA, CENTRO-NORTE DO CRÁTON AMAZÔNICO, ESTADO DE RORAIMA

2020 ◽  
Vol 30 (1) ◽  
pp. 100-114
Author(s):  
Nazaré Barbosa ◽  
Hilberto Soares ◽  
Lorena Feitosa
Keyword(s):  
Low Temperature ◽  
Hydrothermal Alteration ◽  
Glass Matrix ◽  
Welding Process ◽  
Central Portion ◽  
North Central ◽  
Pyroclastic Rocks ◽  
The North ◽  
Amazonian Craton

The Cachoeira da Ilha Formation (FCI) is located in the north central portion of the Amazonian Craton, northeast of Roraima. It is found by ignimbritic rocks with about 1990 Ma. Acid pyroclastic rocks in the region of the municipality of Amajari were classified as ignimbrites: solid, moderately welded and rheomorphic from variations in the degree in the welding process, proportion and type of pyroclasts and textural aspects. The crystalloclasts are made of quartz, sanidine and plagioclase and are dispersed in a glass-matrix. They are usually found with corrosion, dentate and intensely sericitized and/or saussuritized gulfs, showing low temperature hydrothermal alteration. It is also possible to distinguish mafic, microporphyritic and cognate lithitic fragments.

Enameled Cold End Surface for Low Temperature Service

1962 ◽  
Vol 84 (4) ◽  
pp. 307-310
Author(s):  
L. D. Grames ◽  
H. W. Huffcut
Keyword(s):  
Low Temperature ◽  
Service Life ◽  
Base Metal ◽  
Low Cost ◽  
Acid Resistance ◽  
Acid Attack ◽  
Boiler Efficiency

A search for a relatively inexpensive material for combined acid resistance and ease of cleaning pointed to the use of porcelain enamel on a low-cost base metal. These specially formulated porcelain enamels have resisted acid attack, thereby prolonging the service life of the element, thus opening the avenue for lowering exit-gas temperatures and improving boiler efficiency.

On the hatching of Nematodirus battus, with some remarks on N. filicollis

Parasitology ◽  
1962 ◽  
Vol 52 (3-4) ◽  
pp. 297-313 ◽  
Author(s):  
M. G. Christie
Keyword(s):  
Low Temperature ◽  
British Isles ◽  
Temperature Optimum ◽  
Laboratory Conditions ◽  
North East ◽  
The North ◽  
Higher Temperature ◽  
Do So

1. The hatching of N. battus under laboratory conditions was investigated. A high hatch of ripe eggs was obtained on exposure to constant temperatures in the approximate range 8–15° C., and very little hatching took place at temperatures outside this range.2. These, and other published results can be explained in terms of a hypothesis transferred from the study of the breaking of insect diapause. This hypothesis supposes that two processes underly the completion of hatching—a cold process with low temperature optimum and a warm process with a higher temperature optimum and which can only proceed as the cold process is completed.3. It is not easy to apply these findings directly to field events, but the attempt to do so leads to the suggestion that the apparent synchrony of hatching and the presence of susceptible lamb hosts in the north-east of the British Isles may be partly fortuitous, and that in slightly different climatic circumstances many eggs might hatch in the autumn or during the winter.I wish to thank Mr A. V. Cunningham of Threepwood, Galashiels, and Mr J. M. M. Cunningham of the Edinburgh School of Agriculture for their generous help in making sampling of their flocks possible, and Dr J. T. Stamp for advice on the presentation of this paper.

Study on Asphalt Treated Permeable Base in Cold Area

2013 ◽  
Vol 438-439 ◽  
pp. 373-377
Author(s):  
Li Hui Li ◽  
Wen Li Li
Keyword(s):  
Mechanical Property ◽  
Low Temperature ◽  
North China ◽  
Drainage System ◽  
Pavement Performance ◽  
Water Stability ◽  
The North ◽  
Cold Area ◽  
Excessive Water ◽  
Weather Characteristics

The pavement performance and extend service of life will be greatly improved by establish pavement sub drainage system to remove excessive water to the edge of highway in time. This paper designed three kinds of asphalt-treated permeable base (ATPB) with different opens grades, and according to the weather characteristics of the north China, their road performances such as water permeability, water stability, anti-cracking, mechanical property have been studied at low temperature by experiment. It is verified that ATPB-25 is more suitable as permeable base in cold area.

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