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41.
    
Detection of changes in spatial processes has long been of interest to quantitative geographers seeking to test models, validate theories, and anticipate change. Given the current “data-rich” environment of today, it may be time to reconsider the methodological approaches used for quantifying change in spatial processes. New tools emerging from computer vision research may hold particular potential to make significant advances in quantifying changes in spatial processes. In this article, two comparative indices from computer vision, the structural similarity (SSIM) index, and the complex wavelet structural similarity (CWSSIM) index were examined for their utility in the comparison of real and simulated spatial data sets. Gaussian Markov random fields were simulated and compared with both metrics. A case study into comparison of snow water equivalent spatial patterns over northern Canada was used to explore the properties of these indices on real-world data. CWSSIM was found to be less sensitive than SSIM to changing window dimension. The CWSSIM appears to have significant potential in characterizing change and/or similarity; distinguishing between map pairs that possess subtle structural differences. Further research is required to explore the utility of these approaches for empirical comparison cases of different forms of landscape change and in comparison to human judgments of spatial pattern differences.  相似文献   
42.
    
Recent scholarship on scurvy in 18th-century Britain has focused on the disease in the context of voyages of exploration, especially those bound for the Pacific Ocean. Using materials from quack physicians, print culture and popular song, this essay contends that the problem of scurvy was just as acute in metropolitan London and elsewhere in Britain. By studying representations of the disease and its markets at home in Britain, it aims to shed new light on the treatment and perception of the disease at sea, particularly during the voyages of James Cook (1768?79).  相似文献   
43.
Grassroots Secwepemc attempted to stop the expansion of Sun Peaks resort on a site for Indigenous knowledge. I attend to the practice of Indigenous knowledge related to the confrontation and assert that Indigenous sovereignty and identity were outcomes. To make this argument, I investigate the space made for emotion, affect and intuition in the performance of Indigenous knowledge. From a relational materialist position, these more-than-representational forces play an important role in epistemology, ontology, ethics, and subjectivity. Identity therefore materialized in three ways related to feeling(s). As a result of their attunement to these forces, the Secwepemc understood that (non)humans underpin their material being and placed the collective on the political horizon. Furthermore, the practice of Indigenous knowledge encouraged an identity characterized by “attentiveness” to feeling(s) and to the activity of feeling itself. From the perspective of the struggles of subjugated knowledge, I also contextualize the attentiveness at the core of Indigenous knowledge practices as part of a more-than-representational and decolonizing spatial politics.  相似文献   
44.
This article explores ideas of home and place making that bear on the narrated realities of 14 women who are drug users living with HIV in Vancouver's Downtown Eastside. ‘Taming Space’ refers to the negotiations, transgressions and accommodations they make within particular spatial regimes. As residents of a ‘skid row’ district, research participants work to reconcile personal identities within representations of stigmatized space. As the subjects of epidemiological enquiry, clients of public health services and recipients of harm reduction initiatives, women both resist and acquiesce to the parameters of medicalized space. Housing and social service policies further demarcate spatial orders, especially framing women's options for mobility and homemaking. Finally, as street-involved persons they are subject to the often contradictory socio-spatial codes of street drug sociality. Drawing on the concept of turning points, I analyze the diverse narratives of these women as they flesh out particular dynamics of space and identity within broader structural contexts of colonialism, public health and poverty.  相似文献   
45.
Rapid advances in geophysical techniques over the past decade have provided the maritime archaeological community with significant opportunities for re‐defining the procedures for wreck‐site mapping, evaluation and monitoring. The techniques which offer most potential for high‐resolution survey are acoustic‐based and include sidescan sonar, swath‐bathymetry sonar and multibeam sonar. These techniques were tested on an artificial test‐site in Plymouth Sound and over the wreck of the Stirling Castle. Results demonstrate that the techniques can provide the maritime archaeologist with the opportunity to rapidly and cost‐effectively map and monitor small, centimetric changes on sites, with the potential for long‐term monitoring and management. © 2009 The Authors  相似文献   
46.
A particularly useful indicator of past vegetation are phytoliths, glassy products of plant metabolism which have distinctive size and morphology based on the plant taxa which produced them; however, their analysis is a time-consuming task. Building on investigations into mobilizing and sorting of synthetic polystyrene microspheres using a closed loop rectangular microelectromechanical systems (MEMS) electrokinetic array, we investigate these devices’ utility for sorting natural microparticles. Using phytolith samples extracted from archaeological sediment, we show that closed loop MEMS can separate the glassy bodies from both mineral contaminants and each other. Also, small differences in polarization between the phytoliths cause lateral segregation between particles of different sizes and shapes. This process facilitates manual analysis by providing a motive force to the phytoliths that translates and rotates them, showing different configurations as they are propelled by the MEMS array. The organization of the phytoliths into streams also opens the door to automated analysis using image processing. Phytolith assaying is therefore feasible using a MEMS electrokinetic ring and merits additional research to explore the potential of this innovative approach.  相似文献   
47.
EUROPE.

Hawick and the Border. By the late E. S. Craig, Advocate. Edited by the Rev. James Wotherspoon. Hawick: W. and J. Kennedy, 1927. Price 25s.

Wild Drumalbain, or The Road to Meggernie and Glen Coe. By Alasdair Alpin MacGregor. London : W. and K. Chambers Ltd., 1927. Price 7s. 6d.

A Highland Parish: A History of Fortingall. By Alexander Stewart. With a Foreword by Professor W. J. Watson. Glasgow: Alex. MacLaren and Sons, 1928. Price 10s. 6d.

Spain from the South. By J. B. Trench. London : Methuen and Co. Ltd., 1928. Price 10s. 6d.

Marching Spain. By Mr. V. S. Pritchett. London: Ernest Benn Ltd., 1928. Price 10s. 6d.

Pass‐Staaten in den Alpen. Albrecht Haushofer. Berlin‐Grunewald: Kurt Vowinckel, 1928. Preis M 10.

Italy from End to End. By H. Warner Allen. London : Methuen and Co. Ltd., 1927. Price 10s. 6d.

ASIA.

Humanity and Labour in China. By Adelaide Mary Anderson, D.B.E., M.A. London: Student Christian Movement, 1927. Price 10s. 6d. net.

Sketches of Vanishing China. By Arthur H. Heath. London: Thornton Butterworth Ltd., 1927. Price 30s. net.

The British Connection with India. By K. T. Paul. Student Christian Movement, 1927. Price 5s.

The Ordinary Man's India. By A. Claude Brown, M.B.E. London: Cecil Palmer, 1927. Price 10s. 6d.

A Tour in Southern Asia. By Horace Bleackley. London: John Lane, The Bodley Head Ltd., 1928. Price 12s. 6d.

Magic Ladakh: An Intimate Picture of a Land of Topsy‐Turvy Customs and Great Natural Beauty. By “Ganpat” (Major M. L. A. Gompertz, 10th Baluch Regiment, Indian Army), author of The Road to Lamaland, Harilek, The Voice of Dashin, etc. London : Seeley, Service and Co. Ltd., 1928. Price 21s. net.

AFRICA.

Kenya from Within: A Short Political History. By W. M'Gregor Ross, B.A., M.Sc., B.E., M.Inst. C.E., sometime Assistant Engineer, Uganda Railway Construction, 1900; Director of Public Works, East Africa Protectorate (later Kenya Colony), 1905–1923; also Member of Legislative Council, 1916–1922. London : George Allen and Unwin Ltd., 1927. Price 18s. net.

The Black Journey. By Georges‐Marie Haardt and Louis Audouin‐Ddbreuil. London : Geoffrey Bles, 1928. Price 16s.

Nigeria under British Rule. By Sir W. N. Geary, Bart. London: Methuen and Co. Ltd., 1927. Price 16s. net.

A History of South Africa. By Professor Eric A. Walker. London: Longmans, Green and Co. Price 12s. 6d. net.

On the Trail of the Veiled Tuareg. By Dugald Campbell, F.R.A.I., author of In the Heart of Bantuland. London: Seeley, Service and Co., 1928. Price 21s. net.

AMERICA.

A Wayfarer in the West Indies. By Algernon Aspinall, C.M.G. London: Methuen and Co. Ltd., 1927. Price 7s. 6d.

To the Foot of the Rainbow. By Clyde Kluckhohn. London: Eveleigh Nash and Grayson Ltd., 1928. Price 12s. 6d.

Old Trails and Roads in Perm's Land. By John T. Faris. London: J. B. Lippincott Co., 1927. Price 25s. net.

The South American Handbook, 1928. Edited by J. A. Hunter. London: South American Publications Ltd. Price 2s. 6d. net.

AUSTRALIA.

Adventures in the Big Bush. By Cyril Grant Lane. London: Hutchinson and Co., 1928. Price 18s.

POLAR.

Etah and Beyond; or, Life within Twelve Degrees of the Pole. By D. B. Macmillan. London: Chapman and Hall Ltd., 1928. Price 21s. net.

Antarctica: A Treatise ore the Southern Continent. By J. Gordon Hayes. London : The Richards Press, 1928. Price £2, 2s. net.

GENERAL.

Peoples and Problems of the Pacific. By J. Macmillan Brown. 2 vols. London: Ernest Brown, 1927. Price 50s. net.

The Human Habitat. By Ellsworth Huntington. London: Chapman and Hall Ltd., 1928. Price 15s.

The Voyage of the "Caroline” to Van Diemen's Land and Batavia in 1827–38. By Rosalie Hare. With additional chapters by Ida Lee. London: Longmans, Green and Co. Ltd., 1927. Price 15s.

Human Migration and the Future: A Study of the Causes, Effects, and Control of Emigration. By J. W. Gregory, F.R.S., D.Sc., Professor of Geology in the University of Glasgow. London : Seeley, Service and Co. Ltd., 1928. Price 12s. 6d. net.

Grenzen: In ihrer Geographischen und Politischen Bedeutung. Dr. Karl Haushofer. Berlin‐Grunewald : Kurt Vowinckel, 1927. Preis M. 18.

EDUCATIONAL.

An Introduction to Oceanography: With Special Reference to Geography and Geophysics. By James Johnstone, D.Sc. Second Edition, completely revised. London: Hodder and Stoughton Ltd., 1928. Price 15s. net.

Field Astronomy for Engineers and Surveyors. By David Clark, M.A., B.Sc. London: Constable and Co. Ltd., 1926. Price 10s. 6d. net.

Handbook of Commercial Geography. By Geo. G. Chisholm, M.A., B.Sc., Hon. LL.D. (Edin.). Eleventh edition, revised and edited by L. Dudley Stamp, D.Sc., B.A. (Lond.). London: Longmans, Green and Co. Ltd., 1928. Price 25s.

Maps, their History, Characteristics, and Uses. By Sir Herbert George Fordbam. Second Edition. Cambridge : University Press, 1927. Price 6s. net.  相似文献   
48.
As in most other pre-industrial cities, urban life at Teotihuacan was closely intertwined with ceramic technology, perhaps nowhere more so than in the realm of foodways. Here, we use two kinds of information derived from ancient pottery—ceramic residues and intra-site sherd distribution patterns—to shed new light on the city’s subsistence economy. We concentrate in particular on the amphora, a type of vessel that may have been used to contain aguamiel and pulque, liquid foodstuffs made of maguey sap. Distributional data distilled from surface collections of the Teotihuacan Mapping Project are informative about patterned variation in the use of these pots at the scale of the entire city. More focused analyses are aimed at chemical characterization of organic residues preserved in ceramic sherds recovered from recent excavations. Part of a broader project aimed at identifying both animal and plant remains, the results of the residue analysis provide the first direct identification of pulque remains in Teotihuacan pottery.  相似文献   
49.
The timing of the introduction, proliferation and decline of backed artefacts in Australia has been much debated. In south-eastern Australia, after initially appearing at least 8500 years ago, backed artefacts greatly increased in number between 4000 and 3500 years ago to the extent that they are found in numerous sites and are recorded in large numbers in individual sites from that time. From about 1500 years ago they declined markedly in number and had seemingly disappeared by the time of British colonization. Models explaining their proliferation advance the proposition that increased backed artefact production was triggered by heightened foraging risk and/or social re-organisation brought about by a change in climate to a regime which was cooler and drier than any other time during the Holocene combined with intensified ENSO climatic conditions. Our study develops this hypothesis by inferring the use of backed artefacts at Mussel Shelter in the Sydney Basin through an integrated use-wear and residue analysis. These inferences provide new insights into the nature of the evolutionary changes in tool production and use in response to the period of altered climatic conditions.  相似文献   
50.
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