Beginning geography: a human and technical perspective

Abstract

A first course in human geography has been designed for majors and students from the more technical fields at university. It is built around five computer exercises, none of which require any programming or computer skills. Problems and exercises are designed to enhance carry‐over skills and humane awareness.     

An Umm an‐Nar culture stone bas‐relief from Al‐Qutainah,Sultanate of Oman

The Al‐Qutainah stone with its bas‐relief decoration was found in a secondary position, reused through time. The object is clearly a facing stone, originally part of an Umm an‐Nar period tomb, and was subsequently repeatedly reused for making new engravings. While working out the sequence of images it became clear that the very first image was a pair of human figures. This artwork is associated to grave architecture and therefore dates to the Umm an‐Nar period. Two models of interpretation can be suggested, the image of a human pair or the image of a supplicant and deity. Changes in the original meaning of the image indicate conceptual changes in subsequent periods, most probably alterations in the underlying social structure. The importance of the Qutainah stone is not solely due to rare monumental human figurative expression of the period in Oman; furthermore, the find spot in the Adam region is at a distance from the central location of Umm an‐Nar culture that has so far emerged.     

Electoral redistricting and minority political representation in Canada and the United States

This article compares the political representation of visible minorities in Canada and the United States, focusing on differences in federal redistribution (redistricting) practices and constituency composition. Although the two countries both use territorially‐based electoral systems, they operate under different legal standards and institutional environments for the creation of ridings (districts). In the US, redistricting is a highly political process, yet must respect strict population equality standards. Litigation over redistricting is common, and courts adjudicate voting and representation under a constitutional system enforcing strong individual rights. In contrast, Canada's redistribution process is relatively nonpartisan, permits large population variances among ridings, places more emphasis on community rights, and is seldom subject to extensive court challenges. Despite these differences, the two countries exhibit striking similarities in the overall level of visible minority representation relative to population share. Conversely, Canada's population inequalities among ridings create a systematic disadvantage for visible minorities. Political attention to visible minority representation is stronger in the US, but the means to achieve it are constrained both by the judicial limits on group representation and the constitutional limits on the use of racial identity. Canada has a framework for political representation that could easily accommodate significant visible minority representation but lacks the political imperative to use it, in part because doing so would run counter to Canada's multicultural image of these groups as immigrants rather than as non‐white minorities.     

Are new patterns of low‐income distribution emerging in Canadian metropolitan areas?

Recent studies on urban poverty in Canadian cities suggest a growing spatial concentration of poor populations within metropolitan regions. This article assesses trends in the intra‐urban distribution of the poor population from 1986 to 2006 in eight of Canada's largest cities. We consider five well‐known dimensions of segregation, as identified by Massey and Denton (1988) , in order to examine changes in the spatial distribution of poor populations within metropolitan areas: evenness, exposure, concentration, clustering, and centralization. These indices were calculated for low‐income populations at the census tract level using data from five Canadian censuses. Although each metropolitan area has distinctive characteristics, we were able to identify some general trends. The results suggest that, in 2006 compared to 1986, low‐income populations lived in more spatially concentrated areas, which were, at the same time, socioeconomically more homogeneous and more dispersed throughout the metropolitan area. In addition, we observed that over the last twenty years areas of poverty have been located, for the most part, in neighbourhoods adjacent to downtown cores. Nevertheless, we found that poverty has mostly increased in suburban areas located outside inner‐city neighbourhoods. Growing socioeconomic homogeneity and dispersion of low income areas in metropolitan areas reveal new spatial patterns of urban poverty distribution. These findings should be cause for concern as social isolation in the most disadvantaged neighbourhoods could affect the life chances and opportunities for the residents of those areas.     

“They want a different life”: Rural northern settlement dynamics and pathways to homelessness in Yellowknife and Inuvik,Northwest Territories

Visible homelessness in the Northwest Territories, Canada is often described as a recent phenomenon by policy makers and the popular media alike. Indeed, since the late 1990s, homeless shelters in Yellowknife and Inuvik report a steady increase in demand for beds and other support for homeless people. Homelessness in these two communities disproportionately affects Aboriginal northerners, however little is known about their individual pathways to homelessness. Moreover, homelessness in the Northwest Territories is often portrayed as an issue confined to larger “urbanizing” regional centres, yet many homeless Aboriginal northerners have originated from small, rural settlement communities. Despite this, little concern has been paid to how factors at the small community level intersect with more visible forms of homelessness in larger, urban centres, not to mention how these intersections shape a territorial geography of homelessness. In this article, I aim to uncover and explore the often hidden factors at the northern rural settlement level that ultimately contribute to more visible forms of homelessness in northern urban centres. I suggest that uneven and fragmented social, institutional, and economic geographies result in a unique landscape of vulnerability to homelessness in the Northwest Territories. This geography emerges through the production of particular dynamics between rural settlement communities and northern urban centres. In particular, four main factors represent these rural‐urban dynamics: 1) the attractions of opportunity in northern urban centres; 2) rural settlement‐urban institutional flows; 3) chronic housing need in the settlements; and, 4) disintegrating social relationships in the settlements. I explore the particular ways in which these factors influence rural‐urban migration among the homeless population and what roles this mobility plays in individual pathways to homelessness.     

NDVI variation and its relation to climate in Canadian ecozones

Parks Canada began the Northern Satellite Monitoring Program in 1997, with the objective of tracking large‐scale vegetation variation in Canadian ecosystems and helping land managers to develop appropriate management practices in response to climate change. Under this program, a sequence of 10‐day composite Advanced Very High Resolution Radiometer (AVHRR)‐derived Normalized Difference Vegetation Index (NDVI) data from 1985 to 2007 was examined to study seasonal and inter‐annual relationships between vegetation and climate data over Canadian ecosystems using statistical and wavelet analysis. Statistical analysis showed that temperature was the principal driver for seasonal variability in greenness, explaining more than 70 percent of seasonal variation in vegetation for most Canadian ecozones. In comparison with temperature, the relationships between NDVI and precipitation were weaker but still significant. Maximum annual NDVI showed increasing trends in Canadian ecozones during the study period, although increasing rates were spatially heterogeneous. Wavelet analysis confirmed that inter‐annual variation in NDVI was different at two ecozones in Canada. NDVI variation in the Northern Arctic was significant at scales of 3–4 years from 1997 to 2001, which was associated with temperature and precipitation variation. Comparatively, NDVI variation in the Boreal Shield was significant at scales of 5–8 years from 1991 to 1999, but did not correspond with climate variation.     

FRESCO AND LIME‐PAINT: AN EXPERIMENTAL STUDY AND OBJECTIVE CRITERIA FOR DISTINGUISHING BETWEEN THESE PAINTING TECHNIQUES

Identification of the painting technique adopted by an artist is often debated in studies on the characterization, restoration and conservation of mural paintings. However, objective criteria to identify the two main lime‐based painting techniques, fresco and lime‐paint, have not yet been systematically verified on replicas. Replicas were painted following both fresco and lime‐painting techniques. A comparison of microstratigraphic sequences and distribution of chemical elements reveals systematic differences between the two techniques, providing objective distinguishing criteria. Samples from the Abbey of Chiaravalle (Milan, Italy) and Pompeii were also analysed, and the results were compared with experimental data to validate the recommended criteria.     

MICROSTRUCTURE OF FLINT AND OTHER CHERT RAW MATERIALS*

The crystallite size, microstrain, stacking disorder and moganite content of flint and other chert raw materials were studied by X‐ray powder diffraction profile analysis. The broadening of the X‐ray reflections of all microfibrous quartz varieties is due to both anisotropic small crystallite size and anisotropic microstrain. The microstructure varies for samples of different origin. The moganite content and the number of structural defects are higher in flint than in older chert and petrified wood. The X‐ray diffraction pattern of the cortex of flint differs from that of the core material, whereas those of the patina and the unweathered interior of the rocks do not.     

THE FIRST ARCHAEOMETRIC CHARACTERIZATION OF ROMAN MILLSTONES FOUND IN THE AQUILEIA ARCHAEOLOGICAL SITE (UDINE,ITALY)*

An archaeometric study of all the Roman millstones preserved today in the National Archaeological Museum of Aquileia, the ancient capital of the X Regio Augustea –‘Venetia et Histria’ located on the Friuli plain (northeastern Italy), has been recently envisaged to define their geological–geographical provenance. We present here the results of the first step of the research, which is aimed at characterizing all of the definitely allochthonous lithologies. In order to carry out petrography on thin‐section and geochemical analyses, 10 small samples were picked out directly from Pompeian‐style millstones (catilli and/or metae) and rotary querns. Five different lithologies originating in various Italian regions were recognized: eight samples consist of pale‐ and dark‐grey lavas from the Venetian Volcanic Province, Vulsini Volcanic District (Latium), Etna Volcano and Pantelleria island (Sicily), whereas two samples were shown to be made of green garnet‐bearing schists (pietra ollare) from the Western Italian Alps. The presence of Alpine pietra ollare in northeastern Italy, used to produce pots and food containers, was established for numerous classical findings at Roman and Middle Age sites, but the analysed items represent the first evidence for the utilization of this kind of stone to produce mills during the Roman epoch.