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At least 1,153 records · Page 64Linked to original sources
PubMed1988

Urbanization in Taiwan: 1900-1985.

This paper reviews previous research and statistical data concerning urbanization and its relationship to migration in Taiwan from 1900-1985. The level of urbanization was very low when Taiwan was under Japanese rule. The low level of industrialization and the difficulty of communication and transportation in the early stage of development may have impeded migration. Beginning in 1953, Taiwan began a series of economic construction plans. Modern industries have burgeoned in many large cities and their peripheral townships, thus accelerating the urbanization process. The data clearly show that the growth rate of the urban population has been much faster than the rate of change in the proportion that is urban. During the 1920-1940 period, the population of Taiwan gradually moved from places of early settlement to new city centers or newly developed areas. It is quite clear that the process of metropolitan dispersion has increased with the development of urbanization in Taiwan. The pattern of city growth was not consistent from period to period. It was reverse U-shaped for the 1950-1960 period, upward-wave-shaped for the 1960-1970 period, and J-shaped for the 1970-1985 period. If a longer period (e.g., 1947-1985) was observed, then it became upward-wave-shaped again. It is quite clear that there is no simple relationship between city size and city growth. This relationship is affected by stage of development; it also appears to be affected by duration of observation. Generally, the longer the interval observed, and the later the period analyzed, the more the upward-wave-shape holds for the relationship. Many scholars maintain that urban growth in developing countries results primarily from the natural increase of urban populations. However, judging from the rapid urban growth in Taiwan during the 1953-1985 period, and considering the natural increase contributed by migrants in urban areas, it is likely that rural-urban migration is a more important source of urban growth.

Asia↗
PubMed1992

Temporary versus permanent population mobility in Melanesia: a case study from Vanuatu.

"Melanesia's urban population tripled from...7 percent of the region's total population in 1955 to 20 percent by 1985. The recency and magnitude of this development...virtually rules out natural population growth as the principal cause behind this process of rapid urbanization and suggests massive internal population mobility as the most likely cause....This article argues that much of the alleged continued predominance of circular mobility owes more to its underlying operationalizations, ways of measurement, and theoretical conceptualizations than reflects contemporary reality. This argument is substantiated by an analysis of recent developments in Vanuatu mobility set in the local and historical conditions of migration from the island of Paama.... Evidence for this mobility change is derived from a comparative analysis of lifetime mobility histories of urban and rural Paamese men and women."

Demography↗
PubMed2006

Spatial heterogeneity of personal exposure to airborne metals in French urban areas.

The spatial distribution of urban population exposures to ambient air particles was investigated as part of the Genotox'ER study conducted in four metropolitan areas (Grenoble, Paris, Rouen and Strasbourg) in France. In each city, 60 to 90 non-smoking adult and children volunteers were selected. Subjects lived in three different urban sectors: one highly exposed to traffic emissions, one influenced by local industrial sources, and a background urban environment. The Harvard Chempass multi-pollutant personal sampler was used to sample PM10 and PM2.5 particles during 48 h during two different seasons ('hot' and 'cold'). The elemental composition of the filters was analysed by Particle-Induced X-ray Emission (PIXE). Sixteen elements were found to be over the method detection limits: Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn and Pb. The relative concentrations of elements of crustal origin (Si, Al, Ca) were higher in the coarse fraction of PM10 filters, while elements associated with combustion processes (traffic emissions or industrial combustion) presented higher relative concentrations in the PM2.5 fraction (S, Ni, V, Pb). Spatial heterogeneity of elemental exposures by urban sector is substantial for some metals of health concern, with 20% to 90% greater exposure values, on average, in the traffic proximity or industrial sectors, compared to the background sector, for Fe, Zn, Cu, V and Cr. This spatial heterogeneity should not be overlooked in epidemiological or risk assessment studies.

Adolescent↗
PubMed1996

Birth practice patterns in urban slums of Dhaka, Bangladesh.

This study describes the patterns of birth related practices amongst women from an urban slum population in Dhaka city during December 1988 to May 1989. A household census identified all resident women of childbearing age in Rajabazar ward of Dhaka city. Of the 1017 women so identified, 289 women who had given birth to their last child over the previous five years were randomly selected for interview using a structured interview schedule. To observe actual birth practices, sixteen women pregnant for six months or more at the time of the census were followed-up to the immediate post-natal period. Eight local traditional birth attendants (TBAs) were interviewed informally to obtain insights about birthing techniques. A case study for a typical 'normal' delivery is presented and discussed.

Adolescent↗
PubMed1990

The social impact of AIDS in Sub-Saharan Africa.

The potential expansion of the HIV epidemic and its cultural impact in sub-Saharan Africa are vast. Projections under conservative assumptions suggest that the toll of AIDS will reach five million annual deaths by 2010, although the net African population will continue to increase significantly. Cultural practices, including large differences in age between men and women at marriage and a long period of postpartum abstinence, have contributed to the frequency of extramarital relations and eased the spread of sexually transmitted diseases. In response to the spread of AIDS, social adaptations will include profound changes in sexual behavior, marriage customs, and childbearing.

Acquired Immunodeficiency Syndrome↗
PubMed1980

Residential segregation and spatial distribution of a non-labor force population: the needy elderly and disabled.

"Processes of urban change [in the United States] were hypothesized to have created a segregated residential distribution typified by a concentration of disadvantaged and chronically unemployed individuals in decaying inner cities and the employed middle class in suburbs. This hypothesis was tested in one heavily urbanized area for a non-labor force population of needy elderly and disabled persons." Data were obtained from the Fourth Count Summary Tapes of the 1970 census

Americas↗
PubMed1991

[The formation of Quebec's urban populations: the Saguenay region in the nineteenth and twentieth centuries].

The author explores trends in urbanization during the nineteenth and twentieth centuries for the Saguenay region of Quebec province, Canada. He finds that "the Saguenay region experienced rapid urbanization at the end of the 19th century....Towns...attracted large numbers of immigrants from various geographic origins, with a marked male dominance. Flows from the East of Quebec...increased significantly (rural exodus) while new recruitment areas appeared in the more distant and more urbanized regions of western Quebec (selective outmigration)." (SUMMARY IN ENG AND SPA)

Americas↗
PubMed1994

Interactions between birth cohort and urbanization on gastric cancer mortality in Taiwan.

Birth-cohort analysis is of particular importance for gastric cancer since migrant studies have indicated that early life experiences play a dominant role in the occurrence of the disease. However, none of the birth-cohort analyses conducted in various countries have provided information on variation in the birth-cohort phenomenon. To examine the interaction of birth cohort and urbanization, mortality data for gastric cancer between 1971 and 1990 in differentially urbanized areas in Taiwan were analysed. Traditional birth-cohort analysis and age-period-cohort (APC) analysis were employed in the study. The identification problem inherent in the APC analysis was circumvented by the 'individual record' method. Grading of the degree of urbanization of each township and district in Taiwan was based on an urbanization index derived from several demographic and socioeconomic variables. The birth-cohort effects diffused from urban to rural areas after fitting the APC model. In the older generations, born before 1910, the relative risks of gastric cancer were higher in urban areas than in rural ones, but in recent generations, i.e. those born after 1916-1922, the reverse was true. The age curves of gastric cancer mortality emerged as almost straight lines when plotted on a double logarithmic scale. Sex ratios increased with age up to age 60 and then remained constant. The spread of the birth-cohort effects suggested that dietary factors, e.g. dietary habits and food processing practices, in the early life of the population play an important role in the occurrence of gastric cancer.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗