Degree Of Population Density Research Articles

Spatial Distribution Characteristics and Influencing Factors of Museums in Jining, China

In order to provide some reference suggestions for promoting the high-quality development of museums in prefecture-level cities and enhancing the regional cultural competitiveness based on an in-depth understanding of the evolutionary characteristics and the influence mechanism of spatial differentiation during the development of museums, 54 museums in Jining (China) were taken as the research object. The study analysed the spatial distribution characteristics of museums in each county and district of Jining and the main influencing factors were explored. The results showed that: (1) museums in Jining tend to be cohesively distributed, mainly concentrated in the central to the northern part of Jining, followed by the north-western part, with a minor distribution in the eastern and southern parts, and the distribution of museums was uneven within Jining; (2) in terms of spatial distribution, museums in Jining have formed a major aggregation area of Qufu-Yanzhou-Rencheng, as well as a sub-aggregation area, centred on Liangshan, and Weishan, Yutai, and other places in southern Jining, although there were museums distributed, compared to the overall distribution, they were fewer in number, smaller in scope, and less evident in aggregation. (3) In terms of influencing factors, the distribution pattern of museums in Jining was related to resource endowment, highway accessibility, and water distribution, i.e., the distribution of museums was more frequent in areas with more natural and historical resources, a developed highway network, and areas near rivers or lakes. The socio-economic situation, the degree of tourism development, and the degree of population density also affected the layout of museums to a certain extent.

A historical review of the study on biology of the dwarf tapeworm Hymenolepis nana

The purpose of the research: to submit a review of national and foreign literature on biological research of Hymenolepis nana. Materials and methods. Papers on morphology and biology of H. nana (starting from the first discovery of H. nana in 1851 by German parasitologist T. Bilharz until the present moment) written by 26 native and 11 foreign authors served as research material. When analyzing the literature, special attention was paid to the results of the morphological study and development cycle of H. nana taking into account the developmental stages of cestodes. Results and discussion. Specific data on morphology of H. nana and pictures of scolex and proglottids of the dwarf tapeworm using scanning electronic microscopy were provided. Structure of H. nana eggs was described in detail. Most papers are dedicated to the study of biological features of development. Sometimes, H. nana is reproduced by budding (passing through the following development cycle: megalospheres, metamers, invagination, scolexogenesis, larval cysts). Eggs were found in animals’ feces 17-18 days after infestation. H. nana lives in human body for several years, and sometimes 20-38 years. Issues related to the species identity of H. nana and H. fraternal, and mechanisms of transmission and prevalence of infection are discussed. Prevalence of hymenolepiasis in different countries depends not on climate conditions but on the degree of population density. Contamination of hands is an important factor influencing the frequency of hymenolepiasis autoinvasion in patients. The role of rodents as a source of H. nana infection is not essential.

Influence of body image in urbanized areas: differences in long-term changes in teenage body mass index between boys and girls in Japan

Japanese prefecture level panel data for the period 1986–2003 was used to analyze and compare the determinants of teenage body mass index (BMI) by sex. Major findings through random effects estimation were as follows: BMI was not influenced by the degree of population density in males and younger females. However, the BMI of 16-year-old females was markedly lower in more densely populated residential areas. These findings suggest that girls who reach adolescence are more likely to diet and that this tendency is more distinct in more urbanized areas.

Obesity-Promoting Food Environments and the Spatial Clustering of Food Outlets Around Schools

The increasing prevalence of overweight and obesity in school-aged children is potentially linked to contextual influences such as the food environment around schools. The proximity of fast-food and convenience stores to schools may enhance access to unhealthy foods and have a negative impact on diet. This study used spatial cluster analysis to determine whether food outlets are clustered around schools and evaluated the extent of food outlet clustering by school and school neighborhood sociodemographic characteristics. The locations in 2008 of all schools, fast-food outlets, and convenience stores in five urban regions across New Zealand were geocoded. Using GIS analysis conducted in 2009, the number and proportion of outlets within 400-m and 800-m road distance around each school was calculated. The spatial clustering of food outlets within 1.5 km of schools was determined using a multi-type K-function. Food outlet type, school level, SES, the degree of population density, and commercial land use zoning around each school were compared. Primary/intermediate schools had a total proportion of 19.3 outlets per 1000 students within 800 m compared to 6.6 for secondary schools. The most socially deprived quintile of schools had three times the number and proportion of food outlets compared to the least-deprived quintile. There was a high degree of clustering of food outlets around schools, with up to 5.5 times more outlets than might be expected. Outlets were most clustered up to 800 m from schools and around secondary schools, socially deprived schools, and schools in densely populated and commercially zoned areas. Food environments in New Zealand within walking proximity to schools are characterized by a high density of fast-food outlets and convenience stores, particularly in more-socially deprived settings. These obesogenic environments provide ready access to obesity-promoting foods that may have a negative impact on student diet and contribute to inequalities in health.

Regional variations in cardiovascular mortality in Sweden--structural vulnerability in the local community.

The aim of this investigation was to study the connection between various phenomena in the local community and the number of deaths from ischemic heart disease (IHD) for both men and women in the 45-64 age group in the period 1979-1983. The result reveals considerable regional variation. Those areas with an above average male IHD mortality also tended to differ from the norm as regards labour market, and socioeconomic conditions. There was a tendency for unemployment to be higher, the level of employment to be lower, and the number of households with no or only one person gainfully employed larger; there also tended to be more people who had taken or been forced into early retirement, average incomes tended to be lower and there was an above average proportion of blue-collar workers and a below average proportion of white-collar workers. Furthermore, there proved to be a larger proportion of older men. The factors which did not seem to be related to the number of IHD deaths were the divorce rate in the community and the degree of population density. As regards women, there was a less marked connection between the various regional phenomena and the number of IHD deaths. The mortality rate proved to be related to only two factors: the level of unemployment in the community and the proportion of high-income earners. There was a tendency, albeit weak, that areas with an above average mortality also had an above average rate of unemployment and a lower than average proportion of high-income earners.(ABSTRACT TRUNCATED AT 250 WORDS)