Influence of voltage sags and outage costs on realistic radial and backed-up 20-kV rural and urban networks

AFRICON 2015 ◽  
2015 ◽  
Author(s):  
Bruno Jorge de Oliveira e Sousa ◽  
John Millar ◽  
Matti Lehtonen
Keyword(s):  
Voltage Sags ◽  
Urban Networks ◽  
Rural And Urban

Investigating effective maintenance policies for urban networks of residential cities by using optimum and sensitivity analyses

2020 ◽  
Vol 47 (6) ◽  
pp. 691-703
Author(s):  
Ahmed Salah Mohamed ◽  
Talaat Ali Abdel-Wahed ◽  
Ayman Mahmoud Othman
Keyword(s):  
Preventive Treatment ◽  
Cost Effective ◽  
Planning Horizon ◽  
Sensitivity Analyses ◽  
Optimal Time ◽  
Rational Solutions ◽  
Urban Network ◽  
Urban Networks ◽  
Rural And Urban ◽  
Maintenance Policies

Rural and urban networks have been rapidly expanding over time, so there is a rising demand for more optimum maintenance policies (MPs). The low traffic weights on the urban network of a residential city makes the appearance and density of load-associated distresses rare. This encourages the city’s transportation agency to depend on limited treatment choices and the subjective judgement of the agency’s engineers in managing maintenance and rehabilitation (M&R) activities. The engineers’ judgement reflects their extensive field experience and is usually used in this type of city rather than generating optimal computerized solutions. The present study proposes two alternative MPs that are more objective than the policy that depends on engineers’ judgement. One of the proposed alternative policies allows one M&R action along the planning horizon and the other allows multiple M&R actions. The optimum analysis showed that the preventive treatment is the optimal action for more than 50% of the network segments, which means that it plays a vital and nonnegligible role in improving the effectiveness of the M&R activities. Moreover, the sensitivity of the generated M&R plans to the initial performance of the pavement, traffic volume, and the objectives weights is investigated to determine the optimal time, suitable action, maintenance need, and optimal objective weights. The sensitivity analysis showed that varying objective weights leads to different optimal and rational solutions and the most cost-effective solution is not achieved at equal weights for objectives.

MIGRATION, TRANSLOCAL NETWORKS AND SOCIO-ECONOMIC STRATIFICATION IN NAMIBIA

Africa ◽  
2011 ◽  
Vol 81 (4) ◽  
pp. 606-627 ◽  
Author(s):  
Clemens Greiner
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Sub Saharan Africa ◽  
Urban Migration ◽  
Urban Networks ◽  
Rural And Urban Areas ◽  
Economic Stratification ◽  
Rural And Urban ◽  
Sub Saharan ◽  
Price Differences

ABSTRACTRural–urban migration and networks are fundamental for many livelihoods in sub-Saharan Africa. Remittances in cash and kind provide additional income, enhance food security and offer access to viable resources in both rural and urban areas. Migration allows the involved households to benefit from price differences between rural and urban areas. In this contribution, I demonstrate that rural–urban networks not only contribute to poverty alleviation and security, but also further socio-economic stratification. This aspect has been ignored or neglected by most scholars and development planners. Using ethnographic data from Namibia, I have adopted a translocal perspective on migration and stratification, focusing on the resulting impact in rural areas where modern urban forms of stratification, induced by education and income from wage labour, are on the increase.

Management of minor ailments in primary schoolchildren in rural and urban areas

1996 ◽  
Vol 22 (3) ◽  
pp. 167-174
Author(s):  
J A Cantrill ◽  
B Johannesson ◽  
M Nicholson ◽  
P R Noyce
Keyword(s):  
Urban Areas ◽  
Rural And Urban Areas ◽  
Rural And Urban ◽  
Primary Schoolchildren ◽  
Minor Ailments

Drug use differences in rural and urban opioid-dependent pregnant women

2008 ◽  
Author(s):  
Teresa Scott ◽  
Sarah H. Heil ◽  
Karol Kaltenbach ◽  
Amber Holbrook
Keyword(s):  
Drug Use ◽  
Pregnant Women ◽  
Rural And Urban

MORBIDITY PATTERN AMONG ADOLESCENT SCHOOL GIRLS IN RURAL AND URBAN SCHOOL OF JHANSI (U.P.)- A COMPARATIVE CROSS-SECTIONAL SURVEY

2019 ◽  
Vol 3 (9) ◽  
Author(s):  
Shubhanshu Gupta ◽  
Sanjeev Kumar ◽  
Piyush D Swami ◽  
Anjana Niranjan
Keyword(s):  
Health Status ◽  
Adolescent Girls ◽  
Low Socioeconomic Status ◽  
Optimal Level ◽  
Cross Sectional Study ◽  
World Health ◽  
World Population ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Rural And Urban

Background: According to World Health Organization, adolescents constitute about one fifth of the world population, and in India they constitute about 21% of the total population. Most of the surveys show that health status of adolescent girls is at sub-optimal level. Objectives: To assess nutritional status and morbidity pattern among the adolescent girls and to suggest measures for improvement of health status of adolescent girls.  Method: A community based cross-sectional study was carried out among 250 adolescent schoolgirls in Rural and urban field practice area of Jhansi school from January 2017 to July 2014. Results: Among the various morbidities eye problem was seen in maximum no of adolescent girls. Eye problem was present in 44.8% of adolescent girls followed by respiratory 14.7% and ear 13.06% disease. Skin disease was present in 3.2% of adolescent girls, which was more in rural girls 6.7% than in urban girls 1.7%, may be due to better hygienic practice in urban schoolgirls. Conclusions: Rural background, low socioeconomic status, illiteracy, birth rate and order, income and number of members in a family have shown to be significant determinants of morbidity pattern in the adolescent girls. Keywords: Adolescent, anemia, morbidity, vaginal discharge.

Sign in / Sign up

Export Citation Format

Share Document