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Sample records for modeling urban adolescent

  1. CONCLUSIONS Urban Children and Adolescents

    Indian Academy of Sciences (India)

    CONCLUSIONS Urban Children and Adolescents. Increasing prevalence of overweight and obesity and measures of regional (central) adiposity. High prevalence of markers of dysmetabolic state in urban adolescents. ~10% prevalence of dysglycemia in overweight / obese school children.

  2. CONCLUSIONS Urban Children and Adolescents

    Indian Academy of Sciences (India)

    First page Back Continue Last page Overview Graphics. CONCLUSIONS Urban Children and Adolescents. Increasing prevalence of overweight and obesity and measures of regional (central) adiposity. High prevalence of markers of dysmetabolic state in urban adolescents. ~10% prevalence of dysglycemia in overweight ...

  3. Adolescent health in urban India.

    Science.gov (United States)

    Ramadass, S; Gupta, Sanjeev Kumar; Nongkynrih, Baridalyne

    2017-01-01

    Adolescence is the period in human growth and development that occurs after childhood and before adulthood, from ages 10 to 19 years. It is a period of dynamic brain development. During this period, adolescents learn from the social behavior and environmental surroundings of their community. Because of rapid urbanization without accounting for the basic health-care amenities, health disparities tend to arise. In this review, we have tried to describe the health profile of adolescents in urban India. Relevant articles were extracted from PubMed and related websites. Adolescents in urban areas perceive their physical environment as very poor. Social capital and social cohesion are very important in their development. Increasing child marriage and poor antenatal care among adolescents are key challenges in improving the reproductive and sexual health. More than half of adolescents are undernourished. About 56% of adolescent girls are anemic. At this time of fighting against under-nutrition, burden of overweight and obesity is increasing among the urban adolescents. Mass media use and increased sedentary lifestyle increase the risk factors for noncommunicable diseases. Labile mental and emotional behavior makes them prone to suicide and intentional self-harm. Another avoidable key challenge among adolescents is addiction. Urban living and regular media exposure are positively associated with smoking and alcohol consumption. Among unintentional injuries, road traffic accidents dominate the picture. Various health programs targeting adolescent health have been launched in the recent past.

  4. Adolescent health in urban India

    Directory of Open Access Journals (Sweden)

    S Ramadass

    2017-01-01

    Full Text Available Adolescence is the period in human growth and development that occurs after childhood and before adulthood, from ages 10 to 19 years. It is a period of dynamic brain development. During this period, adolescents learn from the social behavior and environmental surroundings of their community. Because of rapid urbanization without accounting for the basic health-care amenities, health disparities tend to arise. In this review, we have tried to describe the health profile of adolescents in urban India. Relevant articles were extracted from PubMed and related websites. Adolescents in urban areas perceive their physical environment as very poor. Social capital and social cohesion are very important in their development. Increasing child marriage and poor antenatal care among adolescents are key challenges in improving the reproductive and sexual health. More than half of adolescents are undernourished. About 56% of adolescent girls are anemic. At this time of fighting against under-nutrition, burden of overweight and obesity is increasing among the urban adolescents. Mass media use and increased sedentary lifestyle increase the risk factors for noncommunicable diseases. Labile mental and emotional behavior makes them prone to suicide and intentional self-harm. Another avoidable key challenge among adolescents is addiction. Urban living and regular media exposure are positively associated with smoking and alcohol consumption. Among unintentional injuries, road traffic accidents dominate the picture. Various health programs targeting adolescent health have been launched in the recent past.

  5. Suicide among urban South African adolescents.

    Science.gov (United States)

    Burrows, Stephanie; Laflamme, Lucie

    2008-01-01

    Knowledge of suicide epidemiology in low- and middle-income settings is important for both well-tailored policies and an increased global understanding of suicide macro-determinants. Adolescents are an important target group in that respect, and those from South Africa are a particular concern, given the additional challenges associated with dramatic political, economic, and health transition. This study presents a profile of adolescent suicide occurrence and sex, race, and city differences. Adolescents aged 10-19 years in post-apartheid urban South Africa. Sex-, race- and city-specific suicide rates were calculated for two age groups (10-14, 15-19 years). Using logistic regression, odds ratios were compiled, first adjusting for age, then additionally for sex, race, and city. Female subjects, those classified as 'coloured' (denoting mixed racial origin), and those living in Tshwane were used as reference groups. Proportions (with 95% confidence intervals) of leading suicide methods were compared. Suicide rates were considerably higher among older adolescents and varied by sex, race, and city. Males had more than twice the odds of committing suicide compared with females. In the fully adjusted model, differences between races were not significant, but city-level differences remained. The leading suicide method was hanging for males and both hanging and poisoning for females. In contemporary urban South Africa, male sex, and city of residence, but not race, were associated with the commission of adolescent suicide, which tends to occur by quite specific methods. The findings warrant research into the possible underlying contextual, demographic, and individual mechanisms.

  6. Walking, cycling and the urban form: A Heckman selection model of active travel mode and distance by young adolescents

    DEFF Research Database (Denmark)

    Kaplan, Sigal; Nielsen, Thomas Alexander Sick; Prato, Carlo Giacomo

    2016-01-01

    and the extent of active travel of young adolescents while considering walking and cycling as distinct travel forms, controlling for objective urban form measures, and taking both a "street-buffer" looking at the immediate home surroundings and a "transport-zone" looking at wider neighborhoods. A Heckman......Physical inactivity of children and adolescents is a major public health challenge of the modern era but, when adequately promoted and nurtured, active travel offers immediate health benefits and forms future sustainable and healthy travel habits. This study explores jointly the choice...... environments for walking and cycling, as the former relates to "street-buffer" urban form measures and the latter also to "transport-zone " ones. Results also show that lessening the amount and the density of car traffic, diminishing the movement of heavy vehicles in local streets, reducing the conflict points...

  7. Use of Theory to Examine Health Responsibility in Urban Adolescents.

    Science.gov (United States)

    Ayres, Cynthia G; Pontes, Nancy M

    The study's purpose was to examine the factors that may influence health responsibility among adolescents. More specifically, this study examined relationships among health responsibility, resilience, neighborhood perception, social support, and health promoting behaviors in adolescents, between the ages of 13 and 18years old. The Health Promotion Model was used as the theoretical framework. This study empirically tested theoretical relationships postulated in the literature between health responsibility and the variables: (a) resilience (b) social support (c) neighborhood perception (d) social support and (e) health promoting behaviors. A correlational study design was used. A convenience sample of 122 adolescents in an urban setting completed questionnaires assessing health responsibility, resilience, social support, neighborhood perception, health promoting behaviors, and a demographic questionnaire. Pearson correlations were used to examine relationships among variables. A statistically significant relationship was found between health responsibility and healthy promoting behaviors (r=0.733, p<0.001) and between health responsibility and neighborhood perception (r=0.163, p<0.01). No relationships were found between the dependent variable of health responsibility and the independent variables of resilience and social support in this population. Study findings help contribute to the body of knowledge regarding the factors that influence health responsibility among urban adolescents to promote adoption and maintenance of healthy behaviors among this population. Nurses need to educate adolescents to provide them with a good understanding of the consequences of health behaviors so that they can assess their own risk and make responsible, healthy choices. Copyright © 2017 Elsevier Inc. All rights reserved.

  8. A music-based HIV prevention intervention for urban adolescents.

    Science.gov (United States)

    Lemieux, Anthony F; Fisher, Jeffrey D; Pratto, Felicia

    2008-05-01

    This research examines the process of conducting and evaluating a music-based HIV prevention intervention among urban adolescents, and is informed by the information, motivation, behavioral skills (IMB) model. Musically talented opinion leaders were recruited to write, record, and distribute HIV prevention themed music to their peers to increase HIV prevention motivation, behavioral skills, and behaviors. In this 3-month field experiment, participants were 306 students enrolled in health classes at each of three large multiracial urban high schools (one treatment school; two control schools). Measures of HIV prevention information, motivation, behavioral skills, and behaviors, both pre- and postintervention. Results indicate that the intervention influenced several aspects of HIV prevention motivation, behavioral skills, and condom use and HIV testing behaviors. This research demonstrates that the incorporation of music into HIV prevention interventions for adolescents has the potential to be effective.

  9. Weight status and eating habits of adolescent Nigerian urban ...

    African Journals Online (AJOL)

    Background. Obesity in adolescence is common, and eating habits are a key determinant. Eating habits in adolescence often differ substantially from those in any other phase of life. Objective. To assess the weight status and eating habits of adolescent urban secondary school girls in Benin City, Nigeria. Methods.

  10. Examining Rural/Urban Differences in Prescription Opioid Misuse Among US Adolescents.

    Science.gov (United States)

    Monnat, Shannon M; Rigg, Khary K

    2016-01-01

    This study examines differences in prescription opioid misuse (POM) among adolescents in rural, small urban, and large urban areas of the United States and identifies several individual, social, and community risk factors contributing to those differences. We used nationally representative data from the 2011 and 2012 National Survey on Drug Use and Health and estimated binary logistic regression and formal mediation models to assess past-year POM among 32,036 adolescents aged 12-17. Among adolescents, 6.8% of rural, 6.0% of small urban, and 5.3% of large urban engaged in past-year POM. Net of multiple risk and protective factors, rural adolescents have 35% greater odds and small urban adolescents have 21% greater odds of past-year POM compared to large urban adolescents. The difference between rural and small urban adolescents was not significant. Criminal activity, lower perceived substance use risk, and greater use of emergency medical treatment partially contribute to higher odds among rural adolescents, but they are also partially buffered by less peer substance use, less illicit drug access, and stronger religious beliefs. Researchers, policy makers, and treatment providers must consider the complex array of individual, social, and community risk and protective factors to understand rural/urban differences in adolescent POM. Potential points of intervention to prevent POM in general and reduce rural disparities include early education about addiction risks, use of family drug courts to link criminal offenders to treatment, and access to nonemergency medical services to reduce rural residents' reliance on emergency departments where opioid prescribing is more likely. © 2015 National Rural Health Association.

  11. Examining Rural/Urban Differences in Prescription Opioid Misuse Among U.S. Adolescents

    Science.gov (United States)

    Monnat, Shannon M.; Rigg, Khary K.

    2015-01-01

    Purpose This study examines differences in prescription opioid misuse (POM) among adolescents in rural, small urban and large urban areas of the US and identifies several individual, social, and community risk factors contributing to those differences. Methods We used nationally representative data from the 2011 and 2012 National Survey on Drug Use and Health (NSDUH) and estimated binary logistic regression and formal mediation models to assess past-year POM among 32,036 adolescents aged 12–17. Results Among adolescents, 6.8% of rural, 6.0% of small urban, and 5.3% of large urban engaged in past-year POM. Net of multiple risk and protective factors, rural adolescents have 35% greater odds and small urban adolescents have 21% greater odds of past-year POM compared to large urban adolescents. The difference between rural and small urban adolescents was not significant. Criminal activity, lower perceived substance use risk, and greater use of emergency medical treatment partially contribute to higher odds among rural adolescents, but they are also partially buffered by less peer substance use, less illicit drug access, and stronger religious beliefs. Conclusions Researchers, policy makers, and treatment providers must consider the complex array of individual, social, and community risk and protective factors to understand rural/urban differences in adolescent POM. Potential points of intervention to prevent POM in general and reduce rural disparities include early education about addiction risks, use of family drug courts to link criminal offenders to treatment, and access to non-emergency medical services to reduce rural residents’ reliance on emergency departments where opioid prescribing is more likely. PMID:26344571

  12. Outcome expectancies and gambling behavior among urban adolescents.

    Science.gov (United States)

    Wickwire, Emerson M; Whelan, James P; Meyers, Andrew W

    2010-03-01

    This project sought to identify adolescent outcome expectancies for gambling and to evaluate their relation to gambling behavior among a sample of urban adolescents. In a preliminary study, 50 outcome expectancies were identified on the basis of a literature review or generated after surveying 35 urban high school students. These expectancies were then administered to 1,076 urban high school students. Rates of at-risk and problem gambling were 14.6% and 12.7%, respectively. Exploratory and confirmatory factor analyses were performed on randomly selected halves of the sample and identified 5 expectancy domains. In a structural equation model, material gain, negative affect, and positive self-evaluation displayed significant positive relations, and negative social consequences and parent disapproval displayed significant negative relations, to gambling behavior. The model explained 48% of the variance in gambling problems and 58% of the variance in gambling frequency. These results demonstrate the salience of gambling-related cognitions in understanding the gambling behavior among these at-risk youth and suggest that expectancies may be important prevention targets for this population.

  13. Rural and Urban Differences in Sexual Behaviors Among Adolescents in Florida.

    Science.gov (United States)

    Thompson, Erika L; Mahony, Helen; Noble, Charlotte; Wang, Wei; Ziemba, Robert; Malmi, Markku; Maness, Sarah B; Walsh-Buhi, Eric R; Daley, Ellen M

    2018-04-01

    The national teen birth rate is higher in rural compared to urban areas. While national data suggest rural areas may present higher risk for adverse sexual health outcomes among adolescents, it is unknown whether there are differences within the state of Florida. Overall, Florida has poorer sexual health indicators for adolescents compared to national rates. The purpose of this study was to assess differences in sexual behaviors among Florida adolescents by rural-urban community location. This study includes baseline data from a randomized controlled trial conducted in Florida high schools. Of the 6316 participants, 74% were urban and 26% were rural. Participants responded to questions on sexual behaviors, sexual behavior intentions, and demographics. We estimated the effect of rural-urban status on risk outcomes after controlling for demographic variables using generalized linear mixed models. More teens from rural areas reported ever having sex (24.0%) compared to urban teens (19.7%). No significant differences were observed for most of sexual behaviors assessed. Nonetheless, urban participants were less likely to intend to have sex without a condom in the next year compared to rural participants (aOR = 0.76, 95% CI 0.63-0.92). Overall, there were no major differences in sexual behaviors between rural and urban adolescents in Florida. However, sexual intentions differed between rural and urban adolescents; specifically, rural adolescents were more likely to intend to have sex without a condom in the next year compared to urban adolescents. Understanding the specific disparities can inform contraception and sexual health interventions among rural youth.

  14. Reaching urban female adolescents at key points of sexual and ...

    African Journals Online (AJOL)

    Urban areas include large numbers of adolescents (ages 15-19) and young adults (ages 20-24) who may have unmet sexual and reproductive health (SRH) needs. Worldwide, adolescents contribute 11% of births, many of which are in low and middle-income countries. This study uses recently collected longitudinal data ...

  15. Parenting Styles and Adolescents' Learning Strategies in the Urban Community.

    Science.gov (United States)

    Boveja, Marsha E.

    1998-01-01

    Examines the relationship between perceived parenting styles and urban adolescents' learning and studying strategies. Results revealed that those adolescents who perceived their parents as being authoritative tended to engage in more effective learning and study strategies. Discusses implications for counselors and teachers using this information…

  16. Modelling Urban Experiences

    DEFF Research Database (Denmark)

    Jantzen, Christian; Vetner, Mikael

    2008-01-01

    How can urban designers develop an emotionally satisfying environment not only for today's users but also for coming generations? Which devices can they use to elicit interesting and relevant urban experiences? This paper attempts to answer these questions by analyzing the design of Zuidas, a new...

  17. HAPPINESS ORIENTATIONS AMONG ADOLESCENTS RAISED IN URBAN AND RURAL AREAS

    Directory of Open Access Journals (Sweden)

    Anisti Anggraeny

    2016-08-01

    Full Text Available Researcher takes particular interest to discover the respondents’ orientation towards happiness based on where the respondent was raised. The study involves 467 senior high school students with ages ranging from 14-17 years old. The data is analyzed using an adapted society psychological approach. The results shows that adolescents raised in rural areas are consider the family to be a factor that contributes to their happiness. Second, achievement is also a factor that leads to happiness. However for the category, to love and be loved, adolescents growing in urban areas place this as a factor that leads to happiness. Similar with spirituality, friends and leisure time are factors that make adolescents raised in urban areas to become happy. Nevertheless, the results of cross tabulation with Pearson chi square test scoring demonstrates that no correlations exist between adolescent happiness raised from urban or rural areas.

  18. Comparing sleep disorders in urban and suburban adolescents

    Directory of Open Access Journals (Sweden)

    Nur'aini Nur'aini

    2014-10-01

    Full Text Available Background Sleep disturbances commonly occur in adolescents. Socioeconomic levels, lifestyle, and urban or suburban environments influence the sleep patterns of adolescents. The modernization process in urban environments is marked by the development of information technology media, and the lack of parental monitoring potentially influencing adolescent sleep disturbances. Sleep disturbances may affect children's physical growth, as well as their emotional, cognitive, and social development. Objective To assess for sleep disorders in urban and suburban adolescents, and to determine the factors that influence the prevalence of sleep disturbances. Methods A cross-sectional study was conducted on 12 to 15-year-old junior high school students in urban (n=350 and suburban (n=350 environments in the city of Medan, North Sumatera. The study was undertaken from May to June 2010 using the Sleep Disorders Scale for Children (SDSC, a set of questionnaires. The SDSC was filled out by parents based on what they remembered about their children's sleep patterns in the prior 6 months. Results In the urban group, there were 133 (38.0% subjects with sleep disturbances, 182 (52.0% were borderline, and 35 (10.0% were normal. In the suburban group, there were 132 (37.7% subjects with sleep disturbances, 180 (51.4% were borderline, and 38 (10.9% were normal. The most influential factors for sleep disturbances in urban and suburban youth were environmental noise (P=0.001 and consuming beverages that contain caffeine (P=0.001. There were three types of sleep disorders that significantly found more in urban adolescents: disorders of initiating and maintaining sleep, disorders of excessive somnolence, and sleep hyperhidrosis. Conclusion The prevalence of sleep disturbances do not differ between urban and suburban adolescents. Howevet; there are significant differences in the types of sleep disorders experienced. The most influential factors on sleep disturbance in both

  19. Degree of urbanization and gender differences in substance use among Slovak adolescents.

    Science.gov (United States)

    Pitel, Lukas; Geckova, Andrea Madarasova; van Dijk, Jitse P; Reijneveld, Sijmen A

    2011-12-01

    Substance use among adolescents varies with gender and between countries. Urbanization may contribute to this. The aim of our study is to explore the association between the degree of urbanization and gender differences in adolescent smoking, binge drinking, and cannabis use. A cross-sectional questionnaire survey of Slovak adolescents was used (N = 3,493; mean age = 14.33), stratified by degree of urbanization. The effects of gender and urbanization of the area and their interaction on substance use (smoking, binge drinking, and cannabis) were analyzed using a logistic regression model adjusted for age. Gender and area and their interaction had statistically significant (p urbanization of the area, the less riskily females behaved. An exception was found in the case of binge drinking where the results of the interaction of gender and degree of urbanization were not significant for the second least urbanized area. Prevalence rate of substance use among girls increased along with an increasing degree of urbanization, while the prevalence rate of substance use among boys remained constant.

  20. Modeling Urban Fire Growth,

    Science.gov (United States)

    Nuclear explosion damage, *Explosion effects, *Fires, *Flame propagation, Growth (General), Area coverage, Ignition, Combustion, Casualties...Computerized simulation, Predictions, Countermeasures, Fire suppression, Damage assessment, Urban areas, Vulnerability, Data acquisition, Methodology, Symposia

  1. Dynamic Urban Growth Models

    Science.gov (United States)

    1979-12-01

    In the report the concept of 'order by fluctuation,' that has appeared recently in physico-chemical and biological systems, is applied to the description of urban growth. It is shown that fluctuations play a vital role in the evolutionary process of ...

  2. Modelling urban travel times

    NARCIS (Netherlands)

    Zheng, F.

    2011-01-01

    Urban travel times are intrinsically uncertain due to a lot of stochastic characteristics of traffic, especially at signalized intersections. A single travel time does not have much meaning and is not informative to drivers or traffic managers. The range of travel times is large such that certain

  3. Body image dissatisfaction among rural and urban adolescents

    Directory of Open Access Journals (Sweden)

    M.F. Glaner

    2009-01-01

    Full Text Available To identify the prevalence of body image dissatisfaction among adolescents living in rural and urban areas, and to analyze the influence of demographic and anthropometric variables on body image dissatisfaction. A total of 629 adolescents aged 13 to 17 years from urban and rural areas participated in the study. Demographic variables (gender, age, area of residence, anthropometric measurements (body weight, height, skinfold thickness and body image data were collected. BMI (underweight: 25 kg/m² and the sum of two skinfold thicknesses, Σ2SF (girls: low: 36 mm; boys: low: 25 mm were then calculated. The prevalence of body image dissatisfaction was similar (p≥0,05 among rural (64,2% and urban adolescents (62,8%. Boys wished to increase the size of their body silhouette (41,3%, whereas girls wished to reduce it (50,5% (p<0,001. Adolescents with low and excess weight based on BMI and with high Σ2SF presented a 3,14, 8,45 and 2,08 times higher chance of body image dissatisfaction, respectively. A high prevalence of body image dissatisfaction was observed among adolescents from rural and urban areas. An unhealthy nutritional status and body adiposity increase the chances of body image dissatisfaction. These findings emphasize the social pressure on girls to remain slim and on boys to attain an athletic body.

  4. Longitudinal Trajectories of Ethnic Identity among Urban Black and Latino Adolescents

    Science.gov (United States)

    Pahl, Kerstin; Way, Niobe

    2006-01-01

    The current study modeled developmental trajectories of ethnic identity exploration and affirmation and belonging from middle to late adolescence (ages 15-18) and examined how these trajectories varied according to ethnicity, gender, immigrant status, and perceived level of discrimination. The sample consisted of 135 urban low-income Black and…

  5. Information and Communications Technology Acceptance among Malaysian Adolescents in Urban Poverty

    Science.gov (United States)

    Halili, Siti Hajar; Sulaiman, Hamidah; Razak, Rafiza Abdul

    2017-01-01

    This study was conducted to identify the information communication and technology (ICT) usage among adolescents in urban poverty and their acceptance of using ICT in teaching and learning (T&L) process. The Technology Acceptance Model was used in determining the acceptance of ICT by focusing on factors such as perceived ease of use and…

  6. Perception of Risk of HIV among Adolescents' Living in an Urban ...

    African Journals Online (AJOL)

    Due to a number of biological, social, developmental, and behavioural factors young people are disproportionately affected by STIs including HIV and AIDS. Using the Health Belief Model, the study investigated factors influencing perception of risk of HIV among adolescents living in an urban slum in Ghana. Data were ...

  7. Association between neighborhood safety and overweight status among urban adolescents

    Directory of Open Access Journals (Sweden)

    Johnson Renee M

    2009-08-01

    Full Text Available Abstract Background Neighborhood safety may be an important social environmental determinant of overweight. We examined the relationship between perceived neighborhood safety and overweight status, and assessed the validity of reported neighborhood safety among a representative community sample of urban adolescents (who were racially and ethnically diverse. Methods Data come from the 2006 Boston Youth Survey, a cross-sectional study in which public high school students in Boston, MA completed a pencil-and-paper survey. The study used a two-stage, stratified sampling design whereby schools and then 9th–12th grade classrooms within schools were selected (the analytic sample included 1,140 students. Students reported their perceptions of neighborhood safety and several associated dimensions. With self-reported height and weight data, we computed body mass index (BMI, kg/m2 for the adolescents based on CDC growth charts. Chi-square statistics and corresponding p-values were computed to compare perceived neighborhood safety by the several associated dimensions. Prevalence ratios (PRs and 95% confidence intervals (CI were calculated to examine the association between perceived neighborhood safety and the prevalence of overweight status controlling for relevant covariates and school site. Results More than one-third (35.6% of students said they always felt safe in their neighborhood, 43.9% said they sometimes felt safe, 11.6% rarely felt safe, and 8.9% never felt safe. Those students who reported that they rarely or never feel safe in their neighborhoods were more likely than those who said they always or sometimes feel safe to believe that gang violence was a serious problem in their neighborhood or school (68.0% vs. 44.1%, p p = 0.025. In the fully adjusted model (including grade and school stratified by race/ethnicity, we found a statistically significant association between feeling unsafe in one's own neighborhood and overweight status among

  8. Advances in urban climate modeling.

    Science.gov (United States)

    Hidalgo, Julia; Masson, Valéry; Baklanov, Alexander; Pigeon, Grégoire; Gimeno, Luis

    2008-12-01

    Cities interact with the atmosphere over a wide range of scales from the large-scale processes, which have a direct impact on global climate change, to smaller scales, ranging from the conurbation itself to individual buildings. The review presented in this paper analyzes some of the ways in which cities influence atmospheric thermodynamics and airborne pollutant transport. We present the main physical processes that characterize the urban local meteorology (the urban microclimate) and air pollution. We focus on small-scale impacts, including the urban heat island and its causes. The impact on the lower atmosphere over conurbations, air pollution in cities, and the effect on meteorological processes are discussed. An overview of the recent principal advances in urban climatology and air quality modeling in atmospheric numerical models is also presented.

  9. Rap Therapy? An Innovative Approach to Groupwork with Urban Adolescents.

    Science.gov (United States)

    DeCarlo, Alonzo

    2001-01-01

    Describes a study in which young, urban African American adolescents with behavior problems participated in weekly group sessions that used rap music to promote the development of appropriate social skills related to morality, identity, judgement, decision making, anger management, impulse control, and crime and punishment. Overall, student…

  10. Globalization and the "Identity Remix" among Urban Adolescents in India

    Science.gov (United States)

    Rao, Mrinalini A.; Berry, Ruhi; Gonsalves, Ayesha; Hastak, Yogita; Shah, Mukti; Roeser, Robert W.

    2013-01-01

    This study examined adolescents' perceptions of cultural change and identity development during an age of globalization in India. Analyses of data from 1497 Indian, urban, middle-class 12-15-year-olds (46% girls) revealed that these youth were aware of changes in their daily lives due to globalization and evaluated such changes in a pragmatic…

  11. Reaching Urban Female Adolescents at Key Points of Sexual and ...

    African Journals Online (AJOL)

    USER

    Urban areas include large numbers of adolescents (ages 15-19) and young adults (ages 20-24) who may have unmet sexual and reproductive health (SRH) ... of social barriers to their accessing SRH services1-3. Addressing the SRH needs of ... particularly through interpersonal communication channels37. Of note is that ...

  12. Mother and Adolescent Eating in the Context of Food Insecurity: Findings from Urban Public Housing.

    Science.gov (United States)

    Bruening, Meg; Lucio, Joanna; Brennhofer, Stephanie

    2017-10-01

    Introduction Anecdotal evidence suggests that parents protect their children from food insecurity and its effects, but few studies have concurrently assessed food insecurity among youth and parents. The purpose of this study was to examine food insecurity and eating behaviors among an urban sample of mother-adolescent dyads. Methods Mother-adolescent dyads (n = 55) were from six public housing sites in Phoenix, Arizona who completed surveys during 2014. Multivariate mixed linear and logistic regression models assessed the relationship between mother and adolescent eating behaviors in the context of food insecurity. Results Food insecurity was prevalent with 65.4% of parents and 43.6% of adolescents reporting food insecurity; 34.5% of parents and 14.5% of adolescents reported very low food security. After adjusting for food insecurity status, parents' and adolescents' fruit, vegetable, and sugar-sweetened beverage consumption was not associated. However, significant associations were observed between mothers' and adolescents' fast food intake (β = 0.52; p food insecurity given the lower prevalence of food insecurity observed among adolescents. Interventions addressing food insecurity among mothers and adolescents may want to capitalize on shared eating patterns and address issues related to binge eating and leverage site-based strengths of public housing.

  13. Association of Youth and Caregiver Anxiety and Asthma Care Among Urban Young Adolescents.

    Science.gov (United States)

    Bruzzese, Jean-Marie; Reigada, Laura C; Lamm, Alexandra; Wang, Jing; Li, Meng; Zandieh, Stephanie O; Klein, Rachel G

    To examine the association of adolescent asthma-related anxiety, social anxiety, separation anxiety, and caregiver asthma-related anxiety with asthma care by urban adolescents. Participants were 386 ethnic minority adolescents (mean age 12.8 years) with persistent asthma and their caregivers. Adolescents reported what they do to prevent asthma symptoms and to manage acute symptoms, and if they or their caregiver is responsible for their asthma care. Adolescents completed the Youth Asthma-Related Anxiety Scale, and the social and separation anxiety subscales of the Screen for Child Anxiety and Emotional Disorders (SCARED); caregivers completed the Parent Asthma-Related Anxiety Scale. Linearity of the associations was assessed by generalized additive models. When there was no evidence for nonlinearity, linear mixed effects models were used to evaluate the effects of the predictors. Adolescent asthma-related anxiety had a strong curvilinear relationship with symptom prevention (P Adolescents took more prevention steps as their anxiety increased, with a plateau at moderate anxiety. There was a linear relationship of adolescent asthma-related anxiety to symptom management (β = 0.03, P = .021) and to asthma responsibility (β = 0.11, P = .015), and of caregiver asthma-related anxiety to adolescent symptom prevention (β = 0.04, P = .001). Adolescent social and separation anxiety had weak to no relationship with asthma care. Results remained consistent when controlling for each of the other anxieties. Asthma-related anxiety plays an important, independent role in asthma care. When low, adolescents may benefit from increased support from caregivers and awareness of the consequences of uncontrolled asthma. When elevated, health providers should ensure the adolescents are not assuming responsibility for asthma care prematurely. Copyright © 2016 Academic Pediatric Association. Published by Elsevier Inc. All rights reserved.

  14. Urban tree growth modeling

    Science.gov (United States)

    E. Gregory McPherson; Paula J. Peper

    2012-01-01

    This paper describes three long-term tree growth studies conducted to evaluate tree performance because repeated measurements of the same trees produce critical data for growth model calibration and validation. Several empirical and process-based approaches to modeling tree growth are reviewed. Modeling is more advanced in the fields of forestry and...

  15. Oral and general health behaviours among Chinese urban adolescents

    DEFF Research Database (Denmark)

    Petersen, Poul Erik; Jiang, Han; Peng, Bin

    2008-01-01

    OBJECTIVES: The objectives of this study were to measure the association of general and oral health-related behaviours with living conditions and to explore the interrelationships between general and oral health-related behaviours in Chinese urban adolescents. METHODS: A cross-sectional survey...... of 2662 adolescents was conducted in eight Chinese provincial capitals. The response rate was 92%. The study population was selected through multistage cluster sampling and comprised three age groups: 11, 13 and 15 years. Data on oral and general health, lifestyles as well as living conditions were...... distributions, regression analyses and factor analyses. RESULTS: Oral health-related behaviours among adolescents were associated with socioeconomic status of parents, school performance and peer relationships. The odds of a dental visit was 0.63 in adolescents of poorly educated parents and the corresponding...

  16. Urban Studies: A Learning Model.

    Science.gov (United States)

    Cooper, Terry L.; Sundeen, Richard

    1979-01-01

    The urban studies learning model described in this article was found to increase students' self-esteem, imbue a more flexible and open perspective, contribute to the capacity for self-direction, produce increases on the feeling reactivity, spontaneity, and acceptance of aggression scales, and expand interpersonal competence. (Author/WI)

  17. The Association of Youth and Caregiver Anxiety and Asthma Care among Urban Young Adolescents

    Science.gov (United States)

    Bruzzese, Jean-Marie; Reigada, Laura C.; Lamm, Alexandra; Wang, Jing; Li, Meng; Zandieh, Stephanie O.; Klein, Rachel G.

    2016-01-01

    Objective To examine the association of adolescent asthma-related anxiety, social anxiety, separation anxiety, and caregiver asthma-related anxiety, with asthma care by urban adolescents. Methods Participants were 386 ethnic minority adolescents (mean age=12.8) with persistent asthma and their caregivers. Adolescents reported what they do to prevent asthma symptoms and to manage acute symptoms, and if they or their caregiver is responsible for their asthma care. Adolescents completed the Youth Asthma-related Anxiety Scale and the social and separation anxiety subscales of the SCARED; caregivers completed the Parent Asthma-related Anxiety Scale. Linearity of the associations was assessed via Generalized Additive Models (GAM). When there was no evidence for non-linearity, linear mixed effects models were employed to evaluate the effects of the predictors. Results Adolescents asthma-related anxiety had a strong curvilinear relationship with symptom prevention (PAdolescents took more prevention steps as their anxiety increased, with a plateau at moderate anxiety. There was a linear relationship of adolescent asthma-related anxiety to symptom management (β=0.03, P=.021) and to asthma responsibility (β=0.11, P=.015), and of caregiver asthma-related anxiety to adolescent symptom prevention (β=0.04, P=.001). Adolescent social and separation anxiety had weak-to-no relationship with asthma care. Results remained consistent when controlling for each of the other anxieties. Conclusions Asthma-related anxiety plays an important, independent role in asthma care. When low, adolescents may benefit from increased support from caregivers and awareness of the consequences of uncontrolled asthma. When elevated, health providers should ensure the adolescents are not assuming responsibility for asthma care prematurely. PMID:27049680

  18. Feature recognition and clustering for urban modelling

    NARCIS (Netherlands)

    Chaszar, A.; Beirao, J.N.

    2013-01-01

    In urban planning exploration and analysis assist the generation, measurement, interpretation and management of the modelled urban environments. This frequently involves categorisation of model elements and identification of element types. Such designation of elements can be achieved through

  19. Understanding complex urban systems integrating multidisciplinary data in urban models

    CERN Document Server

    Gebetsroither-Geringer, Ernst; Atun, Funda; Werner, Liss

    2016-01-01

    This book is devoted to the modeling and understanding of complex urban systems. This second volume of Understanding Complex Urban Systems focuses on the challenges of the modeling tools, concerning, e.g., the quality and quantity of data and the selection of an appropriate modeling approach. It is meant to support urban decision-makers—including municipal politicians, spatial planners, and citizen groups—in choosing an appropriate modeling approach for their particular modeling requirements. The contributors to this volume are from different disciplines, but all share the same goal: optimizing the representation of complex urban systems. They present and discuss a variety of approaches for dealing with data-availability problems and finding appropriate modeling approaches—and not only in terms of computer modeling. The selection of articles featured in this volume reflect a broad variety of new and established modeling approaches such as: - An argument for using Big Data methods in conjunction with Age...

  20. Uric acid excretion predicts increased aggression in urban adolescents.

    Science.gov (United States)

    Mrug, Sylvie; Mrug, Michal

    2016-09-01

    Elevated levels of uric acid have been linked with impulsive and disinhibited behavior in clinical and community populations of adults, but no studies have examined uric acid in relation to adolescent aggression. This study examined the prospective role of uric acid in aggressive behavior among urban, low income adolescents, and whether this relationship varies by gender. A total of 84 adolescents (M age 13.36years; 50% male; 95% African American) self-reported on their physical aggression at baseline and 1.5years later. At baseline, the youth also completed a 12-h (overnight) urine collection at home which was used to measure uric acid excretion. After adjusting for baseline aggression and age, greater uric acid excretion predicted more frequent aggressive behavior at follow up, with no significant gender differences. The results suggest that lowering uric acid levels may help reduce youth aggression. Copyright © 2016 Elsevier Inc. All rights reserved.

  1. Talking Circles for Adolescent Girls in an Urban High School

    Directory of Open Access Journals (Sweden)

    Ann Schumacher

    2014-10-01

    Full Text Available Restorative Practices (RP in schools is a new and emerging field. Meeting in Circles to build friendships, develop emotional literacy skills, resolve conflict, or learn interactively are some of the core components of these programs. This article describes a 2-year study of 12 weekly Talking Circles organized under the auspices of a RP program in an urban high school with 60 adolescent girls. Primary data sources included 257 hr of participant observations in Talking Circles and individual, semi-structured interviews with 31 students. The Relational Cultural model, rooted in the work of Jean Baker Miller, served as the conceptual framework for understanding teens’ interactions within the Circle’s unique set of social conditions in a school environment. Findings demonstrated that Talking Circles provided a safe space for peers helping peers, and that the girls improved their listening, anger management, and empathic skills, which led to greater self-efficacy. It appears that Talking Circles could provide another venue for developing social-emotional literacy skills and growth-fostering relationships in schools.

  2. Dietary pattern and nutritional deficiencies among urban adolescents

    Directory of Open Access Journals (Sweden)

    Mrigen Kr. Deka

    2015-01-01

    Full Text Available Introduction: Adolescents are considered to be a nutritionally vulnerable segment of the population. There is a greater need to look into the nutritional status of adolescents but unfortunately, precise estimates of their dietary intake, dietary practices as well as nutritional deficiencies have been the least explored area. The general objective for conducting this study was to assess the dietary pattern and nutritional deficiencies among adolescents. Materials and Methods: A cross-sectional study was conducted among adolescents in schools and colleges in the urban areas of Jhansi district in Uttar Pradesh. The study sample consisted of 400 school children in the age group of 10-19 years. Food consumption of the subjects was assessed using a 3-day food intake recall method. Results: Mean age of the adolescents was 14.16 years. More than half of the children studied had malnutrition (53.5%. Mean intake of calorie, protein, fat, iron, and vitamins A and C were lower than the Recommended Dietary Allowances (RDAs. The habitual dietary pattern indicated poor consumption of milk, liver, and leafy vegetables. In comparison to boys (31.5%, more girls (46% were underweight. On seeing the association, nutritional status of these adolescents within the normal limits were found to be significantly higher in those from nuclear families (P < 0.001, those with better educated parents (P < 0.000, and those from families of higher socioeconomic status (P < 0.000. Conclusion: Overall, among the participants, there were both macro- and micronutrients deficiencies. Therefore, there is a need to encourage people to adopt small family norms, and a need for the sensitization of both adolescents and their parents through health and nutrition education (HNE to improve the health and nutritional status of the adolescents.

  3. Effects of controlled school-based multi-component model of nutrition and lifestyle interventions on behavior modification, anthropometry and metabolic risk profile of urban Asian Indian adolescents in North India.

    Science.gov (United States)

    Singhal, N; Misra, A; Shah, P; Gulati, S

    2010-04-01

    To study the effectiveness of a multi-component intervention model of nutrition and lifestyle education on behavior modification, anthropometry and metabolic risk profile of urban Asian-Indian adolescents in North India. Two schools matched for student strength and middle socioeconomic strata were randomly allocated to intervention and control group. Changes in nutrition-related knowledge, attitude, lifestyle practices, food frequency and body image of eleventh-grade students (15-17 years) in both schools were tested using a validated questionnaire. Anthropometric and biochemical measurements were made using standard methods. Segmental body composition analysis was carried out using an 8-electrode multifrequency bioelectrical impedance method of body fat estimation. At 6 months follow-up, significant improvement in several domains of knowledge was observed in intervention children (n=99; males=60; females=39) as compared with control school children (n=102; males=61; females=41). In the intervention group, significantly lower proportion of children consumed aerated drinks (15.1%; Peating habits and lifestyle practices, and resulted in beneficial changes in anthropometric and biochemical profiles of the Asian Indian adolescents. This model should be applied on countrywide basis to prevent obesity and diabetes.

  4. Smart Mobility Stakeholders - Curating Urban Data & Models

    Energy Technology Data Exchange (ETDEWEB)

    Sperling, Joshua [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-09-01

    This presentation provides an overview of the curation of urban data and models through engaging SMART mobility stakeholders. SMART Mobility Urban Science Efforts are helping to expose key data sets, models, and roles for the U.S. Department of Energy in engaging across stakeholders to ensure useful insights. This will help to support other Urban Science and broader SMART initiatives.

  5. Use of Models in Urban Transportation Planning

    Science.gov (United States)

    1973-04-01

    The report describes the most commonly used models in urban transportation planning. A background on urban transportation planning is given including changes in planning objectives and the effects of Federal legislation. General concepts and problems...

  6. Urban contamination and dose model

    International Nuclear Information System (INIS)

    Robertson, E.; Barry, P.J.

    1995-10-01

    Nuclear power reactors and other nuclear facilities are being built near or even within urban centres. Accidental releases of radionuclides to the atmosphere in built-up areas result in radiological exposure pathways that differ from those caused by releases in rural environments. Other than inhalation, exposure pathways involve external radiation from the plume while it passes and from radioactivity deposited onto the many and varied surfaces after it has passed. Radiation fields inside buildings are attenuated but many people are potentially exposed so while individual doses may be relatively low, population integrated doses may be high enough to cause concern. It is important, therefore, to assess the potential exposures and to estimate the cost-effectiveness of dose reduction measures in urban environments. This report describes a model developed to carry out such assessments. The model draws heavily on experience gained in European cities after their contamination fallout from the Chernobyl accident. Input is time integrated concentrations of specific radionuclides in urban air, obtained either by direct measurement or by prediction using an atmospheric dispersion model. The code includes default values for site specific variables and transfer parameters but the user is invited if desired to enter other values from the keyboard. Output is the time integrated dose rates for individuals selected because of the characteristic living, working and recreational habits. An accompanying manual documents the technical background on which the model is based and leads a first-time suer through various steps and operations encountered while the model is running. (author). 60 refs., 10 tabs., 1 fig

  7. Urban Adolescents Readily Comply with a Complicated Asthma Research Protocol

    Directory of Open Access Journals (Sweden)

    Stephanie Lovinsky-Desir

    2014-01-01

    Full Text Available Purpose Adolescents are often cited as having poor rates of compliance with medical regimens and research protocols. We quantified compliance in a cohort of urban adolescents participating in a complex research protocol in which measures were obtained without direct supervision by research personnel. Methods A total of 54 early adolescents ages 10-13 were asked to wear a vest containing a personal air pollutant exposure monitor for two 24-hour periods and to perform daily peak expiratory flow (PEF for six consecutive days. Compliance with wearing the vest was measured by comparing accelerometer data from a device within the vest to one worn continuously on the child's wrist. Daily PEF data were recorded using an electronic meter. Results A priori definition of compliance was met by 85% of the adolescents by wearing the exposure monitoring vest and 72% by performing PEF. Conclusions These findings suggest that early adolescents can be compliant with complex research protocols that are needed to help bridge gaps in pediatric asthma research.

  8. Global Urban Mapping and Modeling for Sustainable Urban Development

    Science.gov (United States)

    Zhou, Y.; Li, X.; Asrar, G.; Yu, S.; Smith, S.; Eom, J.; Imhoff, M. L.

    2016-12-01

    In the past several decades, the world has experienced fast urbanization, and this trend is expected to continue for decades to come. Urbanization, one of the major land cover and land use changes (LCLUC), is becoming increasingly important in global environmental changes, such as urban heat island (UHI) growth and vegetation phenology change. Better scientific insights and effective decision-making unarguably require reliable science-based information on spatiotemporal changes in urban extent and their environmental impacts. In this study, we developed a globally consistent 20-year urban map series to evaluate the time-reactive nature of global urbanization from the nighttime lights remote sensing data, and projected future urban expansion in the 21st century by employing an integrated modeling framework (Zhou et al. 2014, Zhou et al. 2015). We then evaluated the impacts of urbanization on building energy use and vegetation phenology that affect both ecosystem services and human health. We extended the modeling capability of building energy use in the Global Change Assessment Model (GCAM) with consideration of UHI effects by coupling the remote sensing based urbanization modeling and explored the impact of UHI on building energy use. We also investigated the impact of urbanization on vegetation phenology by using an improved phenology detection algorithm. The derived spatiotemporal information on historical and potential future urbanization and its implications in building energy use and vegetation phenology will be of great value in sustainable urban design and development for building energy use and human health (e.g., pollen allergy), especially when considered together with other factors such as climate variability and change. Zhou, Y., S. J. Smith, C. D. Elvidge, K. Zhao, A. Thomson & M. Imhoff (2014) A cluster-based method to map urban area from DMSP/OLS nightlights. Remote Sensing of Environment, 147, 173-185. Zhou, Y., S. J. Smith, K. Zhao, M. Imhoff, A

  9. Digital expression among urban, low-income African American adolescents.

    Science.gov (United States)

    Baker, Christina M; Staiano, Amanda E; Calvert, Sandra L

    2011-01-01

    Digital production is a means through which African American adolescents communicate and express their experiences with peers. This study examined the content and the form of the digital productions of 24 urban, low-income African American adolescents who attended a summer academic program. The content of student digital productions focused on academic experiences and friendships. Their production styles revealed that youth used perceptually salient production features, such as rapid scene changes and loud rap music. The results suggest that when placed in a supportive, academic environment and provided with digital production resources, students who traditionally face barriers due to cultural and economic inequalities digitally express to their peers an interest in academics and positive peer relationships, and that these youth communicate their experiences through a shared production style that reflects their broader cultural experiences.

  10. Risk and Protective Factors for Depressive Symptoms in Urban African American Adolescents

    Science.gov (United States)

    Tandon, Darius S.; Solomon, Barry S.

    2009-01-01

    There is limited understanding of risk and protective factors associated with depression among African American adolescents living in impoverished, urban settings. A cross-sectional study was conducted to identify a range of risk and protective factors associated with depressive symptoms among low-income urban African American adolescents. The…

  11. Urban Adolescent Students and Technology: Access, Use and Interest in Learning Language and Literacy

    Science.gov (United States)

    Li, Jia; Snow, Catherine; White, Claire

    2015-01-01

    Adolescents today have vastly different opportunities to learn and process information via pervasive digital technologies and social media. However, there is scant literature on the impact of these technologies on urban adolescents with lower socioeconomic status. This study of 531 urban students in grades 6-8 used a self-reported survey to…

  12. Randomized Trial Outcomes of a TTM-Tailored Condom Use and Smoking Intervention in Urban Adolescent Females

    Science.gov (United States)

    Redding, Colleen A.; Prochaska, James O.; Armstrong, Kay; Rossi, Joseph S.; Hoeppner, Bettina B.; Sun, Xiaowu; Kobayashi, Hisanori; Yin, Hui-Qing; Coviello, Donna; Evers, Kerry; Velicer, Wayne F.

    2015-01-01

    Smoking and sexual risk behaviors in urban adolescent females are prevalent and problematic. Family planning clinics reach those who are at most risk. This randomized effectiveness trial evaluated a transtheoretical model (TTM)-tailored intervention to increase condom use and decrease smoking. At baseline, a total of 828 14- to 17-year-old females…

  13. Migrant Adolescent Girls in Urban Slums India: Aspirations, Opportunities and Challenges

    OpenAIRE

    Agarwal, Siddharth; Jones, Eleri; Verma, Shabnam

    2016-01-01

    Migrant adolescent girls in India’s fast-growing urban-slum population face multiple intersecting vulnerabilities, including gender, poverty and migrant-status. The study aims to understand the opportunities and challenges for migrant adolescent girls in low-income urban slum settings. Qualitative data were collected through interviews with girls aged 12-19 who migrated during the past two years and non-migrant adolescent girls for comparison to explore their exp...

  14. Anthropometric Characteristics of Underprivileged Adolescents: A Study from Urban Slums of India

    Directory of Open Access Journals (Sweden)

    Sushama A. Khopkar

    2014-01-01

    Full Text Available Purpose. The anthropometric status and growth of adolescents living in challenging conditions such as slums are insufficiently studied. The purpose here was to describe anthropometric characteristics and nutritional status of adolescents from urban slums of India and to study the factors affecting it. Methods. Anthropometric, socioeconomic and dietary habit data were collected using structured questionnaires of six hundred adolescents aged 10–19 years by house-to-house survey conducted in two randomly selected slums of Nashik, Western India. The growth of adolescents was compared using WHO and Indian reference populations. Mixed effects logistic regression models were used to examine associations between anthropometric measures and income, mother’s education, household size, and dietary intake. Results. Prevalences of stunting and thinness were lower using the Indian reference population compared to that of WHO. Stunting was more prevalent than thinness in the study subjects, and boys suffered more than girls. The effect of age on stunting was different among boys than girls. A mother’s education was highly significantly associated with both stunting and thinness in both sexes. Household size and income were significantly associated with the nutritional status of girls. Conclusions. Educating mothers about the nutritional needs of adolescents may help to improve adolescents’ anthropometric profile and future health.

  15. Psychosocial factors influencing the frequency of fast-food consumption among urban and rural Costa Rican adolescents.

    Science.gov (United States)

    Monge-Rojas, Rafael; Smith-Castro, Vanessa; Colón-Ramos, Uriyoán; Aragón, M Catalina; Herrera-Raven, Francisco

    2013-01-01

    The aim of this study was to identify psychosocial factors that influence fast-food consumption in urban and rural Costa Rican adolescents. A self-administered questionnaire designed for the study asked about sociodemographic information, frequency of fast-food consumption, meaning of "fast food," location of purchase, and psychosocial correlates. Five psychosocial factors were extracted by using principal components analysis with Varimax rotation method and eigenvalues. Descriptive statistics and a hierarchical linear regression model were used to predict the frequency of fast-food consumption. Responses from 400 adolescents (ages 12-17 y) reveal that daily consumption of fast food was 1.8 times more frequently mentioned by rural adolescents compared with urban youth. Urban and rural differences were found in the way adolescents classified fast foods (rural adolescents included more traditional foods like chips, sandwiches, and Casado-a dish consisting of rice, black beans, plantains, salad, and a meat), and in purchasing locations (rural adolescents identified neighborhood convenience stores as fast-food restaurants). Living in rural areas, convenience and availability of foods, and the presence of external loci of control were predictors of a higher frequency of fast-food consumption, whereas health awareness predicted a lower frequency. The development of interventions to reduce fast-food consumption in Costa Rican adolescents should consider not only convenience, but also the availability of these foods where adolescents are more exposed, particularly in rural areas. Interventions such as improving the convenience of healthy fast foods available in school canteens and neighborhood stores, policies to increase the price of unhealthy fast food, and activities to provide adolescents with the skills to increase self-efficacy and reduce the effect of external loci of control are recommended. Copyright © 2013 Elsevier Inc. All rights reserved.

  16. Urban sprawl modeling using cellular automata

    Directory of Open Access Journals (Sweden)

    Shikhar Deep

    2014-12-01

    Full Text Available The population settlements in the fast-growing urban world need to be monitored in order to design a sustainable urban habitat. The remote sensing and GIS are considered as an effective monitoring and decision-support tool in urban planning. This study compiles the results of a study undertaken to measure the urban sprawl in Dehradun city, India through cellular automata CA-Markov model. CA-Markov model can effectively be used to study the urban dynamics in rapidly growing cities. Being an effective tool for encoding spatial structures, the information generated by it could be used to predict urban scenarios for sustainable growth. To achieve the goal, the temporal images of LISS IV were used to analyse the spatial pattern of land cover change in the area and the future growth was modeled by applying CA-Markov model. The results clearly suggest that major changes between the periods of 2004 and 2009 occurred in built up classes (about 27% followed by agriculture (17.7% and fallow land (10.2%. The projection as predicted using CA-Markov model suggested a value of kappa coefficient = 0.91 which indicates the validity of the model to predict future projections. Modeling suggested a clear trend of various land use classes’ transformation in the area of urban built up expansions. It is concluded that RS and GIS can be an effective decision support tool for policy makers to design sustainable urban habitats.

  17. Subclinical depression in Urban Indian adolescents: Prevalence, felt needs, and correlates

    OpenAIRE

    Singhal, Meghna; Manjula, M.; Vijay Sagar, K. John

    2016-01-01

    Background: Subclinical depression in adolescents constitutes a risk factor for future clinical depression and hence warrants examination. However, there is a paucity of research that documents subclinical depression among adolescents in India. Objectives: (a) To investigate the prevalence of subclinical depression in urban school-going adolescents; (b) to investigate the problems and felt needs of these adolescents; (c) to examine depression-related variables; and (d) to examine the relation...

  18. What parents don't know: Disclosure and secrecy in a sample of urban adolescents.

    Science.gov (United States)

    Jäggi, Lena; Drazdowski, Tess K; Kliewer, Wendy

    2016-12-01

    Research with two-parent European households has suggested that secrecy, and not disclosure of information per se, predicts adolescent adjustment difficulties. The present study attempted to replicate this finding using data from a 4-wave study of 358 poor, urban adolescents (47% male; M age = 12 yrs) in the United States, most of whom (>92%) were African American. Adolescents self-reported secrecy, disclosure, depressive symptoms, and delinquency at each wave. Confirmatory factor analyses revealed that a two-factor model with secrecy and disclosure as separate, but correlated, factors was a better fit than a one-factor model. However, predictive models differed from previous research. Secrecy did not predict depressive symptoms, rather depressive symptoms predicted secrecy. For delinquency, there were significant paths from both secrecy to delinquency and delinquency to secrecy, as well as from delinquency to disclosure. These results did not differ by age or sex. Comparisons with previous findings are discussed. Copyright © 2016 The Foundation for Professionals in Services for Adolescents. Published by Elsevier Ltd. All rights reserved.

  19. Modeling of facade leaching in urban catchments

    Science.gov (United States)

    Coutu, S.; Del Giudice, D.; Rossi, L.; Barry, D. A.

    2012-12-01

    Building facades are protected from microbial attack by incorporation of biocides within them. Flow over facades leaches these biocides and transports them to the urban environment. A parsimonious water quantity/quality model applicable for engineered urban watersheds was developed to compute biocide release from facades and their transport at the urban basin scale. The model couples two lumped submodels applicable at the basin scale, and a local model of biocide leaching at the facade scale. For the facade leaching, an existing model applicable at the individual wall scale was utilized. The two lumped models describe urban hydrodynamics and leachate transport. The integrated model allows prediction of biocide concentrations in urban rivers. It was applied to a 15 km2urban hydrosystem in western Switzerland, the Vuachère river basin, to study three facade biocides (terbutryn, carbendazim, diuron). The water quality simulated by the model matched well most of the pollutographs at the outlet of the Vuachère watershed. The model was then used to estimate possible ecotoxicological impacts of facade leachates. To this end, exceedance probabilities and cumulative pollutant loads from the catchment were estimated. Results showed that the considered biocides rarely exceeded the relevant predicted no-effect concentrations for the riverine system. Despite the heterogeneities and complexity of (engineered) urban catchments, the model application demonstrated that a computationally "light" model can be employed to simulate the hydrograph and pollutograph response within them. It thus allows catchment-scale assessment of the potential ecotoxicological impact of biocides on receiving waters.

  20. Association between neighborhood safety and overweight status among urban adolescents

    Science.gov (United States)

    Duncan, Dustin T; Johnson, Renee M; Molnar, Beth E; Azrael, Deborah

    2009-01-01

    Background Neighborhood safety may be an important social environmental determinant of overweight. We examined the relationship between perceived neighborhood safety and overweight status, and assessed the validity of reported neighborhood safety among a representative community sample of urban adolescents (who were racially and ethnically diverse). Methods Data come from the 2006 Boston Youth Survey, a cross-sectional study in which public high school students in Boston, MA completed a pencil-and-paper survey. The study used a two-stage, stratified sampling design whereby schools and then 9th–12th grade classrooms within schools were selected (the analytic sample included 1,140 students). Students reported their perceptions of neighborhood safety and several associated dimensions. With self-reported height and weight data, we computed body mass index (BMI, kg/m2) for the adolescents based on CDC growth charts. Chi-square statistics and corresponding p-values were computed to compare perceived neighborhood safety by the several associated dimensions. Prevalence ratios (PRs) and 95% confidence intervals (CI) were calculated to examine the association between perceived neighborhood safety and the prevalence of overweight status controlling for relevant covariates and school site. Results More than one-third (35.6%) of students said they always felt safe in their neighborhood, 43.9% said they sometimes felt safe, 11.6% rarely felt safe, and 8.9% never felt safe. Those students who reported that they rarely or never feel safe in their neighborhoods were more likely than those who said they always or sometimes feel safe to believe that gang violence was a serious problem in their neighborhood or school (68.0% vs. 44.1%, p school) stratified by race/ethnicity, we found a statistically significant association between feeling unsafe in one's own neighborhood and overweight status among those in the Other race/ethnicity group [(PR = 1.56, (95% CI: 1.02, 2.40)]. Conclusion

  1. Residential mobility and trajectories of adiposity among adolescents in urban and non-urban neighborhoods.

    Science.gov (United States)

    Jones, Antwan

    2015-04-01

    Using data from the 1994-2008 National Longitudinal Study of Adult Health (Add Health), this research examines the relationship between residential mobility and weight gain over time among urban and non-urban young adults. It is theorized that changes in residence act as a barrier to achieving an active lifestyle, which would increase an individual's body mass index (BMI) over time. Relying on linear mixed-effects growth curve models, the results indicate that mobility is protective against weight gain over time after controlling for sociodemographic characteristics. For young adults who are residentially stable in urban neighborhoods, increases in physical activity are associated with a linear decline in BMI. In non-urban areas where respondents are residentially mobile, body weight does not fluctuate as sedentary behavior increases. However, in those areas, weight increases as sedentary behavior increases for those who did not move. Overall, the results suggest that the effect of mobility on weight gain is partially due to the kind of health behaviors that one engages in as well as whether or not one lives in an urban area. Policies geared toward relocating residents (such as Moving to Opportunity), and neighborhood processes that can lead individuals to change residences (such as foreclosures or gentrification) may have adverse health effects depending on whether they are occurring in urban or non-urban areas.

  2. Effect of body weight and behavioural factors on caries severity in Mexican rural and urban adolescents.

    Science.gov (United States)

    Lara-Capi, Cynthia; Cagetti, Maria Grazia; Cocco, Fabio; Lingström, Peter; García-Godoy, Franklin; Campus, Guglielmo

    2018-01-11

    To investigate if, in Mexican adolescents, body weight and caries severity are associated, and if this association differs between rural and urban populations. Adolescents from the rural area of Tepancan and the city of Veracruz were enrolled. Caries was recorded using the International Caries Detection and Assessment System and the body mass index (BMI) was calculated. Oral habits (toothbrushing, flossing, dental check-ups) and dietary patterns (sweets intake) were assessed. A dummy variable between BMI and living area (BMI/Area) was generated. Data were analysed using STATA and a multinomial logistic regression model was run, using caries severity as the dependent variable. Four-hundred and sixty-four subjects, 12-15 years of age, participated (rural = 240; urban = 224). The BMI and area of residence were significantly associated (χ 2 = 12.59, P caries severity (χ 2 = 24.23, P caries in dentine recorded in participants from the rural area. The dummy variable BMI/Area was related to caries severity (χ 2 = 27.47, P caries in dentine were most frequently found in the rural area. A higher prevalence of caries in enamel and a lower prevalence of caries in dentine (P caries severity (P caries severity in the overall population, but it became a statistically significant risk indicator in adolescents living in the rural area. © 2018 FDI World Dental Federation.

  3. Neighborhood Concentrated Disadvantage and Dating Violence among Urban Adolescents: The Mediating Role of Neighborhood Social Processes.

    Science.gov (United States)

    Garthe, Rachel C; Gorman-Smith, Deborah; Gregory, Joshua; E Schoeny, Michael

    2018-03-14

    The link between relationship violence and aspects of neighborhood concentrated disadvantage (e.g., percent of unemployed adults, percent of families below poverty level), has been established. However, the literature examining neighborhood social processes, including informal social control and social cohesion, in relation to adolescent dating violence has shown mixed results with a limited theoretical foundation and methodology. Using a social disorganization theoretical framework, this study examined the mediating role of these neighborhood social processes in the relation between concentrated disadvantage and adolescent dating violence within an urban context. Participants included 605 adult residents in 30 census tracts and 203 adolescents from neighborhoods on the West and South sides of Chicago. Neighborhood-level concentrated disadvantage was measured via Census data, adult residents reported on neighborhood social processes, and youth reported on dating violence. Informal social control was negatively associated with dating violence, and social cohesion was positively associated with dating violence. A multilevel mediation model showed that concentrated disadvantage was related to higher levels of dating violence via lower levels of informal social control. These results extend social disorganization theory to dating violence within an urban context, while also highlighting the important role of neighborhood processes on relationship violence. Implications for research and intervention programming are discussed. © Society for Community Research and Action 2018.

  4. Use of illicit drugs by adolescents and young adults of an urban settlement in Brazil

    Directory of Open Access Journals (Sweden)

    Rafael Alves Guimarães

    Full Text Available Summary Objective: To estimate the prevalence and factors associated with illicit drug use by adolescents and young adults of a formal urban settlement. Method: Cross-sectional study including adolescents and young adults 12-24 years of an urban settlement in the Midwest Region of Brazil. Data were collected using a structured questionnaire and analyzed using Stata, version 12.0. We used Poisson regression model to estimate the factors associated with illicit drug use. Results: Of the total participants (n=105, 27.6% (95CI 20.0-36.9% had used illicit drugs such as marijuana, cocaine, crack, LSD and inhalants. The consumption of these substances was associated with male gender, use of body piercing and/or tattoos, licit drug use and self-report of signs and/or symptoms of sexually transmitted infections. Conclusion: High prevalence of illicit drug use was found in the individuals investigated, ratifying the presence of risk factors to the vulnerability of the settlers to use these substances in the urban settlement population.

  5. Role of urbanization and air pollution in adolescent asthma: a mass screening in Taiwan.

    Science.gov (United States)

    Lin, R S; Sung, F C; Huang, S L; Gou, Y L; Ko, Y C; Gou, H W; Shaw, C K

    2001-10-01

    The prevalence of asthma in school children in Taiwan is increasing. This study used mass screening among middle school children in Taiwan to determine the prevalence of asthma and related factors. Data were collected from parents using a self-reported questionnaire and from children using the International Study of Asthma and Allergies in Childhood (ISAAC) video questionnaire. Six study teams conducted the survey nationwide in 1995-1996, with the assistance of middle school nurses and teachers. Among the 1,018,031 students at 795 middle schools who returned questionnaires, 8.5% had a history of asthma (ranging in prevalence from 4.2% to 13% in 25 areas). The prevalence of asthma was higher in boys than in girls (10.0% vs 7%) and was highest in more urbanized areas (11.2%), followed by moderately urbanized areas (7.4%) and less urbanized and rural areas (6.5%). Controlling for age, family smoking, family incense burning, and parental education level, multivariate logistic regression models indicated that children living in an area with heavy air pollution were more likely to have asthma than those in an area with no or light pollution (odds ratio, OR = 2.01 and 95% confidence interval, CI = 1.94-2.09 based on parental ranking of pollution level, or OR = 1.30 and 95% CI = 1.18-1.42 based on pollution level reported by the Environmental Protection Administration). Adolescent asthma in Taiwan is most prevalent in the most urbanized areas and decreases in prevalence in less urbanized areas. This study also found that higher parental education level and higher area air pollution were associated with higher adolescent asthma prevalence.

  6. AWARENESS OF REPRODUCTIVE HEALTH IN ADOLESCENT GIRLS: A COMPARATIVE STUDY BETWEEN RURAL AND URBAN BACKGROUND

    Directory of Open Access Journals (Sweden)

    Gunvanti Meena

    2016-08-01

    Full Text Available BACKGROUND Reproductive health is an essential part of the life of each and every individual. Our adolescents particularly rural girls have poor reproductive health awareness, which leads them easy prey to disasters i.e. teenage pregnancy and STDs. OBJECTIVES To evaluate and compare the reproductive health awareness of rural and urban adolescent school girls. METHODS Total 1400 adolescent school girls (700 from rural and 700 urban girls studying in 6th to 12th class were included in the study. Awareness was assessed by a questionnaire. RESULTS Only a few girls were aware about age of onset of adolescence. Term puberty was heard by 444 urban and 306 rural girls. Awareness about changes of adolescence was more for urban girls. Awareness regarding menstruation as activation of reproductive system was more in urban girls. About half girls of both background were aware regarding normal duration of menses. Only a few girls were aware about part of menstruation during which a woman has greatest chances of getting pregnant. Awareness regarding contraception and symptoms of sexual diseases was more in urban girls. Awareness regarding modes of spread of HIV was more in rural girls. CONCLUSION Awareness regarding contraceptive, menstruation, and changes of adolescence is very poor, so special attention is required for these aspects such as including these topics in educational system and there is also need to maintain and increase awareness regarding HIV/AIDS. The health system of India should bridge this huge gap of unmet need of adolescent reproductive health.

  7. Health seeking behaviour and health awareness among rural and urban adolescents in Dehradun District, Uttarakhand, India.

    Science.gov (United States)

    Kumar, Tuhin; Pal, Piyalee; Kaur, Prabhdeep

    2017-04-01

    Adolescents constituted 19% population of India in 2011. Adolescents have health seeking behaviour different from that of adults. We estimated the utilisation of available health care services by adolescents and awareness regarding various health issues in the urban and rural Dehradun District, Uttarakhand, India. We also described knowledge and practices of public sector health care providers. We conducted a cross-sectional survey among adolescents 10-19 years in the urban Dehradun and rural Chakrata block of the Dehradun District. We used cluster sampling with sample size 680 each in urban and rural areas. We collected data from adolescents using semi structured questionnaire on health awareness and utilisation of health care services. Public sector health care providers were surveyed about their knowledge and practices regarding adolescents health. We surveyed 1463 adolescents. The overall mean age was 14.4 (2.6) years, about half being females. Half of the adolescents who had any illness used the public sector. Awareness about anaemia was 48% in urban and 12% in rural areas. A higher proportion of females (Rural: 89%, Urban: 76%) were aware of condoms as contraceptives than males (Rural: 68%, Urban: 12%). Only 62% of doctors and 49% of paramedical staff had knowledge regarding services under Adolescents Reproductive and Sexual Health (ARSH). Awareness regarding various health issues was low among males as compared to females, especially in rural areas. School based health promotion programs should be carried out to increase awareness among adolescents. Health facilities should be strengthened to provide adolescent friendly health services to enhance utilisation.

  8. Differential impacts of social support on mental health: A comparison study of Chinese rural-to-urban migrant adolescents and their urban counterparts in Beijing, China.

    Science.gov (United States)

    Zhuang, Xiao Yu; Wong, Daniel Fu Keung

    2017-02-01

    The number of internal migrant children in China has reached 35.8 million by the end of 2010. Previous studies revealed inconsistent findings regarding the mental health status of rural-to-urban migrant adolescents, as well as the impact of peer, teacher and parental support on the mental health of Chinese adolescent migrants. Using a comparative approach, this study attempted to compare the mental health status between migrant and urban-born adolescents and to clarify the specific roles of different sources of social support in the mental health of migrant and urban adolescents. A cross-sectional survey using a cluster convenience sampling strategy was performed in Beijing, China. A structured questionnaire was filled out by 368 rural-to-urban migrant adolescents and 325 urban-born adolescents. A significant difference was found only for positive affect (PA) but not for negative affect (NA) between the two groups, favouring the urban-born adolescents. Social support from all the three sources were all predictive of PA among rural-to-urban migrant adolescents, while only peer support contributed to PA among urban-born adolescents. Unexpectedly, teachers' support contributed to an increase in NA among urban-born adolescents. The findings contribute to understanding of the mental health status of migrant adolescents in China and the differential impact of the various sources of social support on migrant and urban-born adolescents. Also the findings may inform the development of mental health services and programmes that can potentially benefit a large number of internal migrant adolescents in China.

  9. The influence of urban literature on African-American adolescent girls' sexual behaviors.

    Science.gov (United States)

    Harris, Allyssa L

    2011-07-01

    Many African-American teenaged girls are reading urban literature. This genre of literature is known for its gritty portrayal of urban life and has themes of violence, promiscuity, substance abuse and misogyny. Although research has demonstrated that the portrayal of sex and violence in the media are influential on adolescent sexual behavior, to date there has been little research on the influence of "urban lit" on adolescent sexual risk behaviors. This qualitative study explores the influence of urban literature on the sexual risk behaviors among a group of African-American adolescent girls. Findings from this study suggest that African-American adolescent girls may be influenced by the sexual themes depicted in this genre of literature. Additional research is needed to gain a greater understanding of this phenomon.

  10. Urban Lit and Sexual Risk Behavior: A Survey of African-American Adolescent Girls.

    Science.gov (United States)

    Harris, Allyssa L

    2015-07-01

    Adolescents spend an inordinate amount of time engaged with media, which is highly sexualized. Sexualized material can be found in music, on television and the Internet, as well as in magazines and books. Adolescents engaged with media are often influenced by this sexualized content, leading them to engage in risky sexual behavior. Urban literature (urban lit) is extremely popular among African-American female adolescents due to its portrayal of urban life and hip-hop culture. The purpose of this survey was to ascertain the extent to which African-American adolescent females are reading urban literature and to document whether this genre of literature had an effect on their sexual risk behaviors.

  11. A seven-year investigation of marital expectations and marriage among urban, low-income, African American adolescent mothers.

    Science.gov (United States)

    Oberlander, Sarah E; Agostini, Wendy R Miller; Houston, Avril Melissa; Black, Maureen M

    2010-02-01

    Welfare reform has targeted marriage promotion among low-income women. This study explores patterns of marital expectations and marriage among 181 urban, low-income, African American adolescent mothers and their mothers. Using PROC TRAJ to analyze developmental trajectories of adolescent mother-grandmother relationship quality over 24 months, we categorized relationships as either high or low support. We examined the effects of intergenerational marriage models and adolescent mother-grandmother relationship quality on marital expectations and marriage over the first 7 years postpartum. At 24 months, half (52%) of adolescent mothers expected to marry, but marital expectations did not predict marriage. Marital expectations were associated with concurrent involvement in a romantic relationship, not intergenerational marriage models or a supportive adolescent mother-grandmother relationship. After 7 years, 14% of adolescent mothers were married. Married mothers lived in families characterized by the joint effects of intergenerational marriage models and supportive adolescent mother-grandmother relationships. They were older and had more children than did single mothers, suggesting that they were in a family formation phase of life. Policies that promote the education and employment opportunities necessary to support a family are needed.

  12. Factors Associated with Suicidal Ideation and Suicide Attempt among School-Going Urban Adolescents in Peru

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    Bimala Sharma

    2015-11-01

    Full Text Available The study examines the prevalence of suicidal ideation and suicide attempt, and associated factors among school-going urban adolescents in Peru. A cross-sectional survey was conducted in a sample of 916 secondary school adolescents in 2014. A structured questionnaire adapted from Global School-based Student Health Survey was used to obtain information. Data were analyzed using logistic regression models at 5% level of significance. Overall, 26.3% reported having suicidal ideation, and 17.5% reported having attempted suicide during the past 12 months. Multivariate logistic regression analysis showed that female sex, being in a fight, being insulted, being attacked, perceived unhappiness, smoking and sexual intercourse initiation were significantly associated with increased risk of suicidal ideation, while female sex, being in a fight, being insulted, being attacked, perceived unhappiness, alcohol and illicit drug use were related to suicide attempt. The prevalence of suicidal ideation and suicide attempts observed in the survey area is relatively high. Female adolescents are particularly vulnerable to report suicidal ideation and suicide attempt. Interventions that address the issue of violence against adolescents, fighting with peers, health risk behaviors particularly initiation of smoking, alcohol and illicit drug use and encourage supportive role of parents may reduce the risk of suicidal behaviors.

  13. Area Deprivation Affects Behavioral Problems of Young Adolescents in Mixed Urban and Rural Areas : The TRAILS Study

    NARCIS (Netherlands)

    Reijneveld, S.A.; Veenstra, R.; De Winter, A.F.; Verhulst, F.C.; Ormel, J.; de Meer, G.

    2010-01-01

    Purpose: Behavioral problems occur more frequently among adolescents in deprived areas, but most evidence concerns urbanized areas. Our aim was to assess the impact of area deprivation and urbanization on the occurrence and development of behavioral problems among adolescents in a mixed urban and

  14. Age of onset of first alcohol intoxication and subsequent alcohol use among urban American Indian adolescents.

    Science.gov (United States)

    Henry, Kimberly L; McDonald, James N; Oetting, Eugene R; Walker, Patricia Silk; Walker, R Dale; Beauvais, Fred

    2011-03-01

    The objective was to assess the effect of early onset intoxication on subsequent alcohol involvement among urban American Indian youth. The data come from the American Indian Research (AIR) project, a panel study of urban Indian youth residing in King County, Washington. Data were collected annually from the adolescent and his/her primary caregiver from the 1988-89 school year to the 1996-97 school year, providing a total of nine waves of data. Early intoxication (by age 14) was related to delinquency, family history of alcohol abuse or dependence, poverty, broken family structure, less family cohesiveness, and more family conflict. The effects of these characteristics were, therefore, partialed out in testing effects of early intoxication on later alcohol involvement. Two-part latent growth models of alcohol use and alcohol problems were specified. Effects of early onset intoxication on these trajectories, as well as lifetime alcohol abuse or dependence by the transition to young adulthood, were examined. Findings indicate that adolescents who experienced their first intoxication early (by age 14), used alcohol more heavily from the ages of 16 to 18, experienced more problems related to the alcohol's use from the ages of 16 to 18, and were more likely to have a diagnosed alcohol disorder by the final wave of data collection. Congruent with similar studies in the general population, early intoxication appears to be associated with a deleterious course of alcohol involvement during adolescence and into the transition to young adulthood among urban American Indian youth. Implications for prevention are discussed.

  15. Brief Substance Abuse Treatment with Urban Adolescents: A Translational Research Study

    Science.gov (United States)

    Mason, Michael J.; Posner, Michael A.

    2009-01-01

    The purpose of this translational research study was to test a brief, manualized adolescent substance abuse treatment protocol's effects in an urban community setting compared to a sample in an experimental study from which the treatment was first employed. One hundred two adolescents who were treated with a manualized protocol of five sessions of…

  16. Adolescent Career Development in Urban-Residing Aboriginal Families in Canada

    Science.gov (United States)

    Marshall, Sheila K.; Young, Richard A.; Stevens, Alison; Spence, Wayne; Deyell, Stewart; Easterbrook, Adam; Brokenleg, Martin

    2011-01-01

    The purpose of this study was to understand how urban-residing Aboriginal adolescent-parent dyads (n = 11) jointly constructed and acted on goals and strategies with their social supports (n = 17) to facilitate the adolescents' career development. A modified protocol following the qualitative action-project method was used. A discrete joint…

  17. Team Sports Achievement and Self-Esteem Development among Urban Adolescent Girls

    Science.gov (United States)

    Pedersen, Sara; Seidman, Edward

    2004-01-01

    In this study we investigate the contribution of achievement in team sports to adolescent girls' self-esteem development. Adolescent girls (N = 247) from racially and ethnically diverse backgrounds were surveyed as part of a larger study investigating the development of poor urban youth. Participants responded to items tapping global self-esteem,…

  18. Alcohol Consumption and Injury among Canadian Adolescents: Variations by Urban-Rural Geographic Status

    Science.gov (United States)

    Jiang, Xuran; Li, Dongguang; Boyce, William; Pickett, William

    2008-01-01

    Context: The impact of alcohol consumption on risks for injury among rural adolescents is an important and understudied public health issue. Little is known about whether relationships between alcohol consumption and injury vary between rural and urban adolescents. Purpose: To examine associations between alcohol and medically attended injuries by…

  19. UNMET NEED OF SEX EDUCATION AMONG ADOLESCENTS IN URBAN SLUM AREA: AN INTERVENTIONAL STUDY

    OpenAIRE

    Tamboli Kshitij S, Avachat Subhada S, Tamboli Suchit S

    2015-01-01

    Context: Adolescents comprise one-fifth of India’s total population. There is widespread ignorance associated with unprotected sex, contraceptives, among young people. As majority adolescents in slum areas have illiterate and ignorant family backgrounds; they are misguided by the myths. Hence providing sex education for them is the need of the hour. Aims: 1) To assess the knowledge and awareness of adolescents in an urban slum area regarding some aspects of reproductive health. 2) To assess...

  20. Maternal Attachment and Depressive Symptoms in Urban Adolescents: The Influence of Coping Strategies and Gender

    Science.gov (United States)

    Gaylord-Harden, Noni K.; Taylor, Jeremy J.; Campbell, Cynthya L.; Kesselring, Christine M.; Grant, Kathryn E.

    2009-01-01

    The current study examined coping strategies as mediators of the relation between maternal attachment and depressive symptoms in a sample of urban youth. Participants included 393 adolescents (M age = 12.03, SD = 0.85) participating in a larger study of the impact of stressful life experiences on low-income urban youth. Participants completed…

  1. Dimensions of Religiosity and Access to Religious Social Capital: Correlates with Substance Use among Urban Adolescents

    Science.gov (United States)

    Mason, Michael J.; Schmidt, Christopher; Mennis, Jeremy

    2012-01-01

    Although some evidence indicates that religiosity may be protective against substance use in the urban youth population, limited research has investigated the effects of multiple dimensions of religiosity on substance use in this population. In this study, a sample of 301 urban adolescents was used (a) to test the effects of three dimensions of…

  2. Correlates of Shyness and Unsociability during Early Adolescence in Urban and Rural China

    Science.gov (United States)

    Zhang, Linlin; Eggum-Wilkens, Natalie D.

    2018-01-01

    The purpose of this study was to examine the differentiation and correlates of shyness and unsociability during early adolescence in urban and rural China. Participants were 93 urban and 229 rural Chinese sixth- to eighth-graders. Students rated their shyness, unsociability, fear of negative evaluation, self-efficacy for peer interactions, and…

  3. Urban Teens: Trauma, Posttraumatic Growth, and Emotional Distress among Female Adolescents

    Science.gov (United States)

    Ickovics, Jeanette R.; Meade, Christina S.; Kershaw, Trace S.; Milan, Stephanie; Lewis, Jessica B.; Ethier, Kathleen A.

    2006-01-01

    Urban teens face many traumas, with implications for potential growth and distress. This study examined traumatic events, posttraumatic growth, and emotional distress over 18 months among urban adolescent girls (N = 328). Objectives were to (a) describe types of traumatic events, (b) determine how type and timing of events relate to profiles of…

  4. Gender Differences in Relations among Perceived Family Characteristics and Risky Health Behaviors in Urban Adolescents.

    Science.gov (United States)

    Nelson, Kimberly M; Carey, Kate B; Scott-Sheldon, Lori A J; Eckert, Tanya L; Park, Aesoon; Vanable, Peter A; Ewart, Craig K; Carey, Michael P

    2017-06-01

    Research regarding the role of gender in relations between family characteristics and health risk behaviors has been limited. This study aims to investigate gender differences in associations between family processes and risk-taking in adolescents. Adolescents (N = 249; mean age = 14.5 years) starting their first year at an urban high school in the northeastern USA completed self-report measures that assessed family characteristics (i.e., parental monitoring, family social support, family conflict) and health behaviors (i.e., tobacco use, alcohol use, marijuana use, sex initiation) as part of a prospective, community-based study. Multivariate logistic regression models were used to investigate gender differences in associations between the family characteristics and health behaviors. Among males, higher levels of perceived parental monitoring were associated with lower odds of using tobacco and having ever engaged in sex. Among females, higher levels of perceived parental monitoring were associated with lower odds of marijuana use, alcohol use, and having ever engaged in sex. However, in contrast to males, among females (a) higher levels of perceived family social support were associated with lower odds of alcohol use and having ever engaged in sex and (b) higher levels of perceived family conflict were associated with higher odds of marijuana use and having ever engaged in sex. Family processes were more strongly related to health behaviors among adolescent females than adolescent males. Interventions that increase parental monitoring and family social support as well as decrease family conflict may help to protect against adolescent risk taking, especially for females.

  5. Challenging racism, sexism, and social injustice: support for urban adolescents' critical consciousness development.

    Science.gov (United States)

    Diemer, Matthew A; Kauffman, Aimee; Koenig, Nathan; Trahan, Emily; Hsieh, Chueh-An

    2006-07-01

    This mixed-model study examined the relationship between urban adolescents' perceived support for challenging racism, sexism, and social injustice from peers, family, and community members and their critical consciousness development. These relationships were examined by relating participants' qualitative perceptions of support for challenging racism, sexism, and social injustice to quantitative data obtained from Likert-type measures of the reflection and action components of critical consciousness. Perceived support for challenging racism, sexism, and social injustice had a significant impact upon the reflection component of critical consciousness; the significance criterion was supported by effect size estimates. Support for challenging racism, sexism, and social injustice was not significantly related to the action component of critical consciousness. Participants perceived the most support for challenging racism, moderate support for challenging social injustice, and the least support for challenging sexism. Additionally, female participants perceived more support for challenging sexism than male participants. These results suggest that the informal interactions of urban adolescents play a role in shaping their critical consciousness, and hold implications for psychosocial interventions and research with marginalized populations.

  6. Correlates of overweight and obesity among urban adolescents in Bihar, India

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    Ayan Ghosh

    2015-01-01

    Full Text Available Background: For better perception of adolescent overweight and obesity as a global public health problem, systematic collection of baseline data is urgently needed in India. Objective: A community-based study was undertaken for better perception of the prevalence and correlates of obesity in an adolescent urban community in Katihar, Bihar. Materials and Methods: A cross-sectional study was conducted among urban adolescents in the eastern part of India to find out prevalence of overweight and obesity and sociodemographic correlates by interview technique followed by clinical examination with ethical consideration. Results: Out of 400 adolescent study participants, 21% were overweight or obese. The study showed that there was a significant association between less consumption of vegetable foods, fruits, meals cooked outside the home, alcohol consumption, yoga practice, socioeconomic status, and the occurrence of overweight/obesity in the adolescents. Conclusions: We attempted to find out the prevalence and risk correlates of overweight and obesity among adolescents and found it quite alarming compared to developed countries. The urban underserved population in India has difficulty to access quality healthcare and not conscious enough to seek healthcare until critically ill. Community-based studies are required to highlight the problem of obesity among urban adolescents by a comprehensive approach.

  7. Body Weight Concerns among Urban Adolescent Girls: A Microlevel Study

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    Susmita Mukhopadhyay

    2014-01-01

    Full Text Available Growing consciousness about ideal body image leads to dietary modifications and consequent eating disorders among girls in developing countries like India. The present study aims to (i assess the prevalence of body weight consciousness and related behaviours among a group of adolescent girls; (ii assess the sociodemographic correlates of weight related behaviours; and (iii compare weight related behaviours of the girls of two religious groups residing in Howrah. The study is the outcome of a cross-sectional school based survey involving 280 (159 Hindu and 121 Muslim girls from standards 8 to 11. Significant differences exist between two religious groups with respect to their family size, socioeconomic profile, and media exposures (in terms of watching television. Consciousness about body weight among girls shows significant difference with respect to religion, family size (χ2=64.77, father’s occupation (χ2=60.28, level of education of both the parents, and media exposure (P<0.05. Consciousness about body weight drives them to adopt several behavioural measures like calorie restriction, food avoidance, and dieting. Sociodemographic correlates of all these behaviours have been analyzed. The study documents that concern over body image and weight loss is quite important among these urban girls.

  8. Health effects of perceived racial and religious bullying among urban adolescents in China: a cross-sectional national study.

    Science.gov (United States)

    Pan, Stephen W; Spittal, Patricia M

    2013-07-01

    Research concerning ethnocultural bullying and adolescent health in China remains extremely limited. This study among Chinese urban adolescents examines associations between ethnocultural bullying and eight health-related outcomes: suicidal ideation, suicide planning, depressive symptomology, anxiety symptomatology, fighting, injury intentionally inflicted by another, smoking and moderate/heavy alcohol consumption. Data were obtained from the World Health Organisation's 2003 Chinese Global School-based Health Survey, a cross-sectional national survey of urban adolescents in four Chinese cities. The analytic sample size was n = 8182, which represented a sampling frame of 769,835 adolescents. Statistical analysis was conducted using generalised linear mixed effects models and sampling weights. Prevalence of ethnocultural bullying was significantly higher in Urumqi, Xinjiang province (2.08%) compared with Beijing municipality (0.72%) or Wuhan, Hubei province (0.67%). Compared to participants who were not bullied, religious bullying victimisation was significantly associated with suicidal ideation, injury intentionally inflicted by another and depressive symptomology. Racial bullying victimisation was significantly associated with suicidal ideation, injury intentionally inflicted by another and among females but not males, depressive symptomology. Health effects of ethnocultural bullying appear to be distinct from that of bullying in general. Additional research on ethnocultural adolescent health issues in China is warranted.

  9. Modelling transitions in urban water systems.

    Science.gov (United States)

    Rauch, W; Urich, C; Bach, P M; Rogers, B C; de Haan, F J; Brown, R R; Mair, M; McCarthy, D T; Kleidorfer, M; Sitzenfrei, R; Deletic, A

    2017-12-01

    Long term planning of urban water infrastructure requires acknowledgement that transitions in the water system are driven by changes in the urban environment, as well as societal dynamics. Inherent to the complexity of these underlying processes is that the dynamics of a system's evolution cannot be explained by linear cause-effect relationships and cannot be predicted under narrow sets of assumptions. Planning therefore needs to consider the functional behaviour and performance of integrated flexible infrastructure systems under a wide range of future conditions. This paper presents the first step towards a new generation of integrated planning tools that take such an exploratory planning approach. The spatially explicit model, denoted DAnCE4Water, integrates urban development patterns, water infrastructure changes and the dynamics of socio-institutional changes. While the individual components of the DAnCE4Water model (i.e. modules for simulation of urban development, societal dynamics and evolution/performance of water infrastructure) have been developed elsewhere, this paper presents their integration into a single model. We explain the modelling framework of DAnCE4Water, its potential utility and its software implementation. The integrated model is validated for the case study of an urban catchment located in Melbourne, Australia. Copyright © 2017 Elsevier Ltd. All rights reserved.

  10. KNOWLEDGE, AWARENESS, PRACTICE AMONG ADOLESCENTS REGARDING SEXUALLY TRANSMITTED DISEASES IN URBAN SLUMS

    Directory of Open Access Journals (Sweden)

    Tushar Rai

    2011-06-01

    Full Text Available Background: Sexually transmitted diseases are very important health challenges for adolescents. Many national and international governmental and nongovernmental health agencies are running programmes to reduce the incidence of these diseases. We can provide an insight to the reproductive and sexual health needs of adolescents by assessing their knowledge, attitude and practice about these diseases. Research Question: What is the level of knowledge awareness and practice among adolescents regarding sexually transmitted diseases?  Objectives: To assess the knowledge awareness and practice among adolescents regarding sexually transmitted diseases in an urban slum in Dehradun. Study Design: Cross-Sectional Settings and Participants: Adolescents belonging to registered families of Chandreshwar Nagar urban slum under the field practice area of Urban Health Training Centre (UHTC of department of Community Medicine, Himalayan Institute of Medical Sciences. Sample Size: 166 Adolescents i.e. Males-88 and Females-78. Study Period: May 2009 to October 2009 Study Variable: A predesigned, pretested, self-administered questionnaire was used for collecting information on Age, Sex, Knowledge and awareness regarding STDs, etc. Statistical Analysis: Standard statistical package i.e. SPSS, Microsoft Excel.  Results: 51.2% of the adolescents were having knowledge about STD’s. Majority of (91.4% the adolescents knew about AIDS as a type of STD. Their attitude cum practice towards prevention of STD was found to be 72.9% by use of condoms. Conclusions: Appropriate health care seeking behaviour and Information Education and Communication (IEC activities should be promoted. 

  11. What are the characteristics of 'sexually ready' adolescents? Exploring the sexual readiness of youth in urban poor Accra.

    Science.gov (United States)

    Biney, Adriana A E; Dodoo, F Nii-Amoo

    2016-01-05

    Adolescent sexual activity, especially among the urban poor, remains a challenge. Despite numerous interventions and programs to address the negative consequences arising from early and frequent sexual activity among youth in sub-Saharan Africa, including Ghana, only slight progress has been made. A plausible explanation is that our understanding of what adolescents think about sex and about their own sexuality is poor. In that sense, examining how adolescents in urban poor communities think about their sexual readiness, and identifying characteristics associated with that sexual self-concept dimension, should deepen our understanding of this topical issue. A total of 196 male and female adolescents, ages 12 to 19, were surveyed in the 2011 RIPS Urban Health and Poverty Project in Accra, Ghana. The youth responded to three statements which determined their levels of sexual readiness. Other background characteristics were also obtained enabling the assessment of the correlates of their preparedness to engage in sex. The data were analyzed using ordered logistic regression models. Overall, the majority of respondents did not consider themselves ready for sex. Multivariate analyses indicated that sexual experience, exposure to pornographic movies, gender, ethnicity and household wealth were significantly linked to their readiness for sex. Sexual readiness is related to sexual activity as well as other characteristics of the adolescents, suggesting the need to consider these factors in the design of programs and interventions to curb early sex. The subject of sexual readiness has to be investigated further to ensure adolescents do not identify with any negative effects of this sexual self-view.

  12. Self-Rated Health among Urban Adolescents: The Roles of Age, Gender, and Their Associated Factors.

    Directory of Open Access Journals (Sweden)

    Adriana Lúcia Meireles

    Full Text Available Health status is often analyzed in population surveys. Self-rated health (SRH is a single-item summary measure of the perception of one's health. In Brazil, studies on the SRH of adolescents remain scarce, especially those aiming to understand the domains that compose this construct. Therefore, the aim of this study is to determine the prevalence of poor SRH and its associated factors among 11- to 13-year-olds and 14- to 17-year-olds living in a large urban center in Brazil. This cross-sectional study was conducted using a household survey across Belo Horizonte that included 1,042 adolescents. Stratified logistic regression models were used for each age group to assess the associations between worse SRH and the following variables: socio-demographic, social and family support, lifestyles, psychological health, and anthropometry. Approximately 11% (95% CIs = 8.7-13.6 of the studied adolescents rated their health as poor, and SHR decreased with age among males and females. This trend was more pronounced among girls (from 6.9% among 11- to 13-year-old girls to 16.9% among 14- to 17-year-old girls than boys (from 8.3% among 11- to 13-year-old boys to 11% among 14- to 17-year-old boys. Worse SRH was associated with family support (as assessed by the absence of parent-adolescent conversations; odds ratio [OR] = 3.5 among 11- to 13-year-olds, family structure (OR = 2.8 among 14- to 17-year-olds, and argument reporting (OR = 8.2 among 14- to 17-year-olds. Among older adolescents, the consumption of fruit fewer than five times per week (OR = 2.4, life dissatisfaction (OR = 2.8, underweight status (OR = 6.7, and overweight status (OR = 2.7 were associated with poor SRH. As adolescents age, their universe expands from their relationship with their parents to include more complex issues, such as their lifestyles and life satisfaction. Therefore, these results suggest the importance of evaluating SRH across adolescent age groups and demonstrate the influence

  13. Stability of maternal depressive symptoms among urban, low-income, African American adolescent mothers.

    Science.gov (United States)

    Ramos-Marcuse, Fatima; Oberlander, Sarah E; Papas, Mia A; McNary, Scot W; Hurley, Kristen M; Black, Maureen M

    2010-04-01

    Maternal depressive symptomatology is an important public health issue with negative consequences for both mothers and infants. This study examined prevalence and patterns of depressive symptoms among 181 urban, low-income, first-time, African American adolescent mothers recruited from urban hospitals following delivery. Follow-up evaluations were conducted at 6 (N=148; 82%) and 24 (N=147; 81%) month home visits. Depressive symptoms were measured with Beck Depression Inventory (BDI). Half of mothers (49%) had BDI scores >9 at baseline, with significant correlations between BDI scores across all visits (r=0.28-0.50). Depressive symptom trajectories analyzed using group-based trajectory modeling revealed three trajectories of depressive symptoms: Low (41%), Medium (45%), and High (14%). The high depressive symptom group reported lower self-esteem, more negative life events, and lower parenting satisfaction than the low and moderate depressive symptoms groups. Depressive symptoms were self-reported and not verified with a clinical interview. Findings are limited to urban, low-income, African American adolescent mothers and may not be generalizable to other populations. The high prevalence and relative stability of depressive symptoms through 2years of parenting suggest the need for early identification and treatment of maternal depressive symptoms. Brief screening for maternal depressive symptoms conducted during pediatric well-child visits is a feasible and effective method for identifying mothers with depressive symptoms, however, screening measures can not differentiate between high and low levels of depressive symptoms. Brief intervention may be an effective treatment for mothers with mild symptoms of depression; mothers with moderate to severe symptoms may require more intensive intervention. Copyright 2009 Elsevier B.V. All rights reserved.

  14. Swarm Intelligence for Urban Dynamics Modelling

    Science.gov (United States)

    Ghnemat, Rawan; Bertelle, Cyrille; Duchamp, Gérard H. E.

    2009-04-01

    In this paper, we propose swarm intelligence algorithms to deal with dynamical and spatial organization emergence. The goal is to model and simulate the developement of spatial centers using multi-criteria. We combine a decentralized approach based on emergent clustering mixed with spatial constraints or attractions. We propose an extension of the ant nest building algorithm with multi-center and adaptive process. Typically, this model is suitable to analyse and simulate urban dynamics like gentrification or the dynamics of the cultural equipment in urban area.

  15. Swarm Intelligence for Urban Dynamics Modelling

    International Nuclear Information System (INIS)

    Ghnemat, Rawan; Bertelle, Cyrille; Duchamp, Gerard H. E.

    2009-01-01

    In this paper, we propose swarm intelligence algorithms to deal with dynamical and spatial organization emergence. The goal is to model and simulate the developement of spatial centers using multi-criteria. We combine a decentralized approach based on emergent clustering mixed with spatial constraints or attractions. We propose an extension of the ant nest building algorithm with multi-center and adaptive process. Typically, this model is suitable to analyse and simulate urban dynamics like gentrification or the dynamics of the cultural equipment in urban area.

  16. Self-Concept, Early Childhood Depression and School Retention as Predictors of Adolescent Depression in Urban Hispanic Adolescents

    Science.gov (United States)

    Robles-Pina, Rebecca A.; Defrance, Emily; Cox, Deborah L.

    2008-01-01

    The role that early school retention, early childhood depression and self-concept had on levels of depression in 191 urban Hispanic adolescents was investigated. This exploratory study used a purposeful sample to study relationships and thus causality cannot be inferred. Statistically significant gender differences were found for depression with…

  17. Modeling urban growth in Kigali city Rwanda | Nduwayezu ...

    African Journals Online (AJOL)

    Modeling urban growth in Kigali city Rwanda. ... The uncontrolled urban growth is the key characteristics in most cities in less developed countries. However ... Models built, will help to better understand the dynamics of built-up area and guide sustainable urban development planning of the future urban growth in Kigali city.

  18. Adolescent deliveries in semi-urban Cameroon: prevalence and adverse neonatal outcomes.

    Science.gov (United States)

    Njim, Tsi; Agbor, Valirie Ndip

    2017-06-26

    Adolescent pregnancies are high risk due to the increased probability of adverse outcomes; as adolescents are usually considered to be ill-equipped to deal with the burden of pregnancy. We sought to determine the prevalence of adolescent deliveries in a secondary-level care hospital in semi-urban Cameroon-Bamenda, the adverse neonatal outcomes and to assess if previous obstetric history could preclude adolescents from having adverse outcomes in their present pregnancy. The prevalence of adolescent deliveries was 8.7% (95% CI 7.01-10.73%). The neonates of adolescent mothers were more likely to have severe asphyxia (OR 4.0; 95% CI 1.2-12.9; p = 0.03) and low birth weight (OR 2.4; 95% CI 1.3-4.4; p adolescents were just as likely to have complications as multipara adolescents. The prevalence of adolescent deliveries (8.7%) in the Regional Hospital Bamenda is high. Their babies are at a high risk of adverse neonatal outcomes irrespective of their previous obstetric history (previous delivery) emphasising that adolescents are generally ill-prepared to deal with pregnancy. Strategies to reduce the prevalence of adolescent deliveries should be investigated and implemented in view of attaining the sustainable development goals.

  19. Observation and modelling of urban dew

    Science.gov (United States)

    Richards, Katrina

    Despite its relevance to many aspects of urban climate and to several practical questions, urban dew has largely been ignored. Here, simple observations an out-of-doors scale model, and numerical simulation are used to investigate patterns of dewfall and surface moisture (dew + guttation) in urban environments. Observations and modelling were undertaken in Vancouver, B.C., primarily during the summers of 1993 and 1996. Surveys at several scales (0.02-25 km) show that the main controls on dew are weather, location and site configuration (geometry and surface materials). Weather effects are discussed using an empirical factor, FW . Maximum dew accumulation (up to ~ 0.2 mm per night) is seen on nights with moist air and high FW , i.e., cloudless conditions with light winds. Favoured sites are those with high Ysky and surfaces which cool rapidly after sunset, e.g., grass and well insulated roofs. A 1/8-scale model is designed, constructed, and run at an out-of-doors site to study dew patterns in an urban residential landscape which consists of house lots, a street and an open grassed park. The Internal Thermal Mass (ITM) approach is used to scale the thermal inertia of buildings. The model is validated using data from full-scale sites in Vancouver. Patterns in the model agree with those seen at the full-scale, i.e., dew distribution is governed by weather, site geometry and substrate conditions. Correlation is shown between Ysky and surface moisture accumulation. The feasibility of using a numerical model to simulate urban dew is investigated using a modified version of a rural dew model. Results for simple isolated surfaces-a deciduous tree leaf and an asphalt shingle roof-show promise, especially for built surfaces.

  20. Social factors and dental health in the urban adolescents of Isfahan, Iran.

    Science.gov (United States)

    Asgari, Imaneh; Ebn Ahmady, Arezoo

    2014-09-01

    The aim of this study is to determine the dental caries and oral health behavior status of urban adolescents in Iran. Also it assesses the influence of the socioeconomic background on their oral health outcomes. A cross-sectional study was conducted in the students living in the city of Isfahan, Iran. 597 adolescents by 13 to 17 years old participated in the study. The asset-based wealth index, household income and parents' educational history were the indicators of socioeconomic status. Data on tooth brushing frequency and smoking experience were collected, and the adolescents were examined for their dental health status. The index of DMFT was recorded by two calibrated examiners considering the criteria of World Health Organization. Bivariate analysis and multivariate regressions were employed to explore the association between dental caries status and socioeconomic variables. The DMFT mean (SD) of the study population was 2.79(2.7) with attributable 50, 4 and 46 percent to D, M and F components and 26% caries- free prevalence. Nearly 19% of the students presented twice daily brushing and 3% of respondents had smoking experience. Dental caries did not show any linear relationship with the social indicators when the DMFT was modeled by the wealth index, parents' educational level and family income adjusted for age and gender. Without adjustment, lower income has increased the chance of untreated tooth decay, 2.5 times among the students. Despite the supporting findings on inequalities in oral health, this study did not show a direct association between socio economic backgrounds of the adolescents with their dental health/disease. The hypothesized balanced risk exposure is considered to justify the results, but it needs to be studied by further comprehensive analysis.

  1. Urban drainage models - making uncertainty analysis simple

    DEFF Research Database (Denmark)

    Vezzaro, Luca; Mikkelsen, Peter Steen; Deletic, Ana

    2012-01-01

    There is increasing awareness about uncertainties in modelling of urban drainage systems and, as such, many new methods for uncertainty analyses have been developed. Despite this, all available methods have limitations which restrict their widespread application among practitioners. Here, a modif...

  2. Urban and rural Chinese adolescents' judgments and reasoning about personal and group jurisdiction.

    Science.gov (United States)

    Helwig, Charles C; Yang, Shaogang; Tan, Dingliang; Liu, Chunqiong; Shao, Tiffany

    2011-01-01

    This research applied social domain theory to illuminate reasoning about the perceived legitimacy and limits of group decision making (majority rule) among adolescents from urban and rural China (N = 160). Study 1 revealed that adolescents from both urban and rural China judged group decision making as acceptable for both social conventional and prudential issues, but not for personal issues or those that entailed possible harmful coercion of others. Study 2 revealed that personal jurisdiction develops later for rural than urban adolescents for certain issues (democratic rights to political participation and choice of friends). Results indicate that reasoning about group and personal jurisdiction in a non-Western society (China) is influenced by social domain, age, and environmental setting (modern vs. traditional). © 2011 The Authors. Child Development © 2011 Society for Research in Child Development, Inc.

  3. Exploring Stress and Coping Among Urban African American Adolescents: The Shifting the Lens Study

    OpenAIRE

    Anita Chandra, DrPH; Ameena Batada, DrPH

    2006-01-01

    Introduction Stress can have a significant effect on an adolescent's long-term physical and mental well-being. An understanding of the role of unmanaged stress during early adolescence is critical for the prevention of chronic diseases such as depression. The purpose of the Shifting the Lens study was to explore perceptions of stress, sources of social support, and use of coping strategies among urban African American ninth graders. Methods A youth-driven, mixed-method approach was used ...

  4. Ethnic Identity, Self-Esteem, and Perceived Efficacy as Mediators of the Relation of Supportive Parenting to Psychosocial Outcomes among Urban Adolescents

    Science.gov (United States)

    Swenson, R.R.; Prelow, H.M.

    2005-01-01

    The present study examined the direct and indirect relationships among supportive parenting, ethnic identity, self-esteem, perceived efficacy, and psychological adjustment in an urban sample of 133 African American (M age=16.37) and 110 European American (M age=16.43) adolescents. Although the mediational model was partially supported for both…

  5. Urban meteorological modelling for nuclear emergency preparedness

    International Nuclear Information System (INIS)

    Baklanov, Alexander; Sorensen, Jens Havskov; Hoe, Steen Cordt; Amstrup, Bjarne

    2006-01-01

    The main objectives of the current EU project 'Integrated Systems for Forecasting Urban Meteorology, Air Pollution and Population Exposure' (FUMAPEX) are the improvement of meteorological forecasts for urban areas, the connection of numerical weather prediction (NWP) models to urban air pollution and population dose models, the building of improved urban air quality information and forecasting systems, and their application in cities in various European climates. In addition to the forecast of the worst air-pollution episodes in large cities, the potential use of improved weather forecasts for nuclear emergency management in urban areas, in case of hazardous releases from nuclear accidents or terror acts, is considered. Such use of NWP data is tested for the Copenhagen metropolitan area and the Oresund region. The Danish Meteorological Institute (DMI) is running an experimental version of the HIRLAM NWP model over Zealand including the Copenhagen metropolitan area with a horizontal resolution of 1.4 km, thus approaching the city-scale. This involves 1-km resolution physiographic data with implications for the urban surface parameters, e.g. surface fluxes, roughness length and albedo. For the city of Copenhagen, the enhanced high-resolution NWP forecasting will be provided to demonstrate the improved dispersion forecasting capabilities of the Danish nuclear emergency preparedness decision-support system, the Accident Reporting and Guidance Operational System (ARGOS), used by the Danish Emergency Management Agency (DEMA). Recently, ARGOS has been extended with a capability of real-time calculation of regional-scale atmospheric dispersion of radioactive material from accidental releases. This is effectuated through on-line interfacing with the Danish Emergency Response Model of the Atmosphere (DERMA), which is run at DMI. For local-scale modelling of atmospheric dispersion, ARGOS utilises the Local-Scale Model Chain (LSMC), which makes use of high-resolution DMI

  6. Urban meteorological modelling for nuclear emergency preparedness.

    Science.gov (United States)

    Baklanov, Alexander; Sørensen, Jens Havskov; Hoe, Steen Cordt; Amstrup, Bjarne

    2006-01-01

    The main objectives of the current EU project "Integrated Systems for Forecasting Urban Meteorology, Air Pollution and Population Exposure" (FUMAPEX) are the improvement of meteorological forecasts for urban areas, the connection of numerical weather prediction (NWP) models to urban air pollution and population dose models, the building of improved urban air quality information and forecasting systems, and their application in cities in various European climates. In addition to the forecast of the worst air-pollution episodes in large cities, the potential use of improved weather forecasts for nuclear emergency management in urban areas, in case of hazardous releases from nuclear accidents or terror acts, is considered. Such use of NWP data is tested for the Copenhagen metropolitan area and the Øresund region. The Danish Meteorological Institute (DMI) is running an experimental version of the HIRLAM NWP model over Zealand including the Copenhagen metropolitan area with a horizontal resolution of 1.4km, thus approaching the city-scale. This involves 1-km resolution physiographic data with implications for the urban surface parameters, e.g. surface fluxes, roughness length and albedo. For the city of Copenhagen, the enhanced high-resolution NWP forecasting will be provided to demonstrate the improved dispersion forecasting capabilities of the Danish nuclear emergency preparedness decision-support system, the Accident Reporting and Guidance Operational System (ARGOS), used by the Danish Emergency Management Agency (DEMA). Recently, ARGOS has been extended with a capability of real-time calculation of regional-scale atmospheric dispersion of radioactive material from accidental releases. This is effectuated through on-line interfacing with the Danish Emergency Response Model of the Atmosphere (DERMA), which is run at DMI. For local-scale modelling of atmospheric dispersion, ARGOS utilises the Local-Scale Model Chain (LSMC), which makes use of high-resolution DMI

  7. Stress in the City: Influence of Urban Social Stress and Violence on Pregnancy and Postpartum Quality of Life among Adolescent and Young Mothers.

    Science.gov (United States)

    Willie, Tiara C; Powell, Adeya; Kershaw, Trace

    2016-02-01

    Adolescent and young mothers transitioning from pregnancy to postpartum need to maintain an optimal quality of life. Stress and exposure to violence (e.g., intimate partner violence (IPV), nonpartner violence) are predictors of poor quality of life for adult women; however, these associations remain understudied among adolescent and young mothers in urban areas. Guided by the social ecological model, the current study created a latent variable, urban social stress, to examine the impact of the urban social environment (i.e., stressful life events, discrimination, family stress, and neighborhood problems) on the quality of life of adolescent and young mothers during both pregnancy and postpartum. The current study is a secondary data analysis of a prospective cohort study of 296 expectant young mothers recruited at obstetrics and gynecology clinics. Results from structural equation and multigroup models found that higher urban social stress predicted lower mental and physical quality of life during pregnancy, but these associations were significantly stronger for IPV-exposed and nonpartner violence-exposed mothers. In the postpartum period, higher urban social stress predicted lower mental and physical quality of life, but these associations were significantly stronger for IPV-unexposed and nonpartner violence-exposed mothers. Stress reduction programs need to help adolescent and young mothers in urban areas develop stress management skills specific to urban social stress. Pregnancy and parenting programs need to be tailored to the specific needs of young mothers in urban areas by becoming sensitive to the role of IPV and nonpartner violence in these young women's lives.

  8. The Urban Food-Water Nexus: Modeling Water Footprints of Urban Agriculture using CityCrop

    Science.gov (United States)

    Tooke, T. R.; Lathuilliere, M. J.; Coops, N. C.; Johnson, M. S.

    2014-12-01

    Urban agriculture provides a potential contribution towards more sustainable food production and mitigating some of the human impacts that accompany volatility in regional and global food supply. When considering the capacity of urban landscapes to produce food products, the impact of urban water demand required for food production in cities is often neglected. Urban agricultural studies also tend to be undertaken at broad spatial scales, overlooking the heterogeneity of urban form that exerts an extreme influence on the urban energy balance. As a result, urban planning and management practitioners require, but often do not have, spatially explicit and detailed information to support informed urban agricultural policy, especially as it relates to potential conflicts with sustainability goals targeting water-use. In this research we introduce a new model, CityCrop, a hybrid evapotranspiration-plant growth model that incorporates detailed digital representations of the urban surface and biophysical impacts of the built environment and urban trees to account for the daily variations in net surface radiation. The model enables very fine-scale (sub-meter) estimates of water footprints of potential urban agricultural production. Results of the model are demonstrated for an area in the City of Vancouver, Canada and compared to aspatial model estimates, demonstrating the unique considerations and sensitivities for current and future water footprints of urban agriculture and the implications for urban water planning and policy.

  9. Exposure to violence, social cognitive processing, and sleep problems in urban adolescents.

    Science.gov (United States)

    Kliewer, Wendy; Lepore, Stephen J

    2015-02-01

    Exposure to violence is associated with elevated levels of sleep problems in adolescence, which contributes to poor mental and physical health and impaired academic performance. However, reasons underlying the associations between exposure to violence and sleep difficulty have not been examined. This study tested a social cognitive processing path model linking experiences of witnessing and directly experiencing community violence and sleep problems. Participants were 362 early adolescents (M age = 12.45 years, SD = 0.59; range 11-14 years; 48.9% male; 51% Latino/a; 34% black) from urban communities enrolled in a middle-school-based intervention study on the east coast of the United States that was designed to reduce the negative effects of exposure to violence. All youth in the current study reported witnessing or directly experiencing community violence. Adolescents completed four school-based assessments over an 18-month period, reporting on their exposure to community violence, sleep problems, intrusive thoughts about and social constraints in talking about violence, and life events. A path model that included both victimization and witnessing violence revealed that wave 1 witnessing violence, but not victimization, was associated with elevated social constraints in talking about violence at wave 2, which was associated with elevated intrusive thoughts at wave 3, which was associated with poor sleep quality at wave 4. Prior levels of all constructs were controlled in the analysis, in addition to life events, single parent household status, children's age and sex, intervention condition, and school. Youth exposed to violence may benefit from help in processing their experiences, thus reducing social constraints in talking about their experiences and associated intrusive thoughts. This is turn may improve sleep outcomes.

  10. Urban ecosystem modeling and global change: potential for rational urban management and emissions mitigation.

    Science.gov (United States)

    Chen, Shaoqing; Chen, Bin; Fath, Brian D

    2014-07-01

    Urbanization is a strong and extensive driver that causes environmental pollution and climate change from local to global scale. Modeling cities as ecosystems has been initiated by a wide range of scientists as a key to addressing challenging problems concomitant with urbanization. In this paper, 'urban ecosystem modeling (UEM)' is defined in an inter-disciplinary context to acquire a broad perception of urban ecological properties and their interactions with global change. Furthermore, state-of-the-art models of urban ecosystems are reviewed, categorized as top-down models (including materials/energy-oriented models and structure-oriented models), bottom-up models (including land use-oriented models and infrastructure-oriented models), or hybrid models thereof. Based on the review of UEM studies, a future framework for explicit UEM is proposed based the integration of UEM approaches of different scales, guiding more rational urban management and efficient emissions mitigation. Copyright © 2014 Elsevier Ltd. All rights reserved.

  11. The association between alcohol outlet density and alcohol use among urban and regional Australian adolescents.

    Science.gov (United States)

    Azar, Denise; White, Victoria; Coomber, Kerri; Faulkner, Agatha; Livingston, Michael; Chikritzhs, Tanya; Room, Robin; Wakefield, Melanie

    2016-01-01

    While recent evidence suggests that higher alcohol outlet density is associated with greater alcohol use among adolescents, influence of the four main outlet types on youth drinking within urban and regional communities is unknown. This study provides the first investigation of this relationship. Repeated cross-sectional surveys with random samples of secondary students clustered by school. Mixed-effects logistic regression analyses examined the association between each outlet type and the drinking outcomes, with interaction terms used to test urban/regional differences. Australia, 2002-11. Respondents participating in a triennial survey (aged 12-17 years); 44 897 from urban settings, 23 311 from regional settings. The key outcome measures were past month alcohol use, risky drinking among all students and risky drinking among past week drinkers. For each survey year, students were assigned a postcode-level outlet density (number of licences per 1000 population) for each outlet type (general, on-premise, off-premise, clubs). Interaction terms revealed a significant association between off-premises outlet density and risky drinking among all adolescents in urban (odds ratio = 1.36, 95% confidence interval CI = 1.05-1.75, P alcohol use and risky drinking among all adolescents. Higher densities of general, on- and off-premises outlets in an adolescent's immediate neighbourhood are related to increased likelihood of alcohol consumption among all adolescents. The density of licensed clubs is associated more strongly with drinking for urban than for regional adolescents. © 2015 Society for the Study of Addiction.

  12. Urban adolescent girls' perspectives on romantic relationships: initiation, involvement, negotiation, and conflict.

    Science.gov (United States)

    Volpe, Ellen M; Morales-Alemán, Mercedes M; Teitelman, Anne M

    2014-10-01

    The purpose of this paper was to describe romantic relationships from the perspective of urban, adolescent girls, to address gaps in our understanding of their relationship dimensions. Minority adolescent girls (n  =  17) participated in private semi-structured interviews aimed to elicit the understanding of the adolescents' perspectives on their own relationship experiences and dynamics. The research team conducted conventional content analysis of the interview transcripts. Four major themes emerged about romantic relationships: (1) influence of male pursuit and social norms on relationship initiation factors; (2) a romantic partner is a confidant, friend, and companion; (3) negotiating intimacy respectfully; and (4) relationship conflict through control and abuse. Adolescents described sub-themes of social norms of male pursuit and relationship pressures that dictated relationship initiation. Relationships were depicted by emotional support, caring, and companionship. Adolescents described positive negotiation skills. However, relationship conflict, including controlling behaviors and violence, was illustrated in these same relationships. This study provides a rich description of romantic relationships from the perspectives of urban, adolescent girls. Most salient findings included social pressures and a combination of both positive and negative attributes. Implications include the need for intervention development at the community level to address social pressures, recognition of positive adolescent relationship attributes, and facilitation of skills to identify and address low-quality relationship characteristics.

  13. Prevalence of Depressive Symptoms among Urban Adolescents of South India

    Science.gov (United States)

    Mohanraj, Rani; Subbaiah, Karunanidhi

    2010-01-01

    Aim: This study aimed to find the prevalence of depressive symptoms among adolescents studying in schools in Chennai. Settings and Design: The study was a school based cross-sectional survey in which data were collected through a self-administered questionnaire from adolescents studying in classes X, XI and XII. Material: Beck Depression Inventory…

  14. Collective Efficacy, Family Attachment, and Urban Adolescent Suicide Attempts

    Science.gov (United States)

    Maimon, David; Browning, Christopher R.; Brooks-Gunn, Jeanne

    2010-01-01

    The suicide rate among American adolescents between the ages of 14-25 has dramatically increased during the last 50 years, and this fact has been the focus of extensive social-scientific investigation. To date, however, research focusing on the joint effects of mental health, family, and contextual-level predictors on adolescents' suicidal…

  15. Gender Consciousness among Urban Adolescents in Osun State ...

    African Journals Online (AJOL)

    This study attempted to find out whether adolescents express their consciousness about the two dimensions of gender (public and private) and to determine the level ofmanifestations of gender consciousness among early and late adolescents. For the purpose of this study, 100(M=56, F=44) were randomly selected from ...

  16. In urban South Africa, 16 year old adolescents experience greater health equality than children.

    Science.gov (United States)

    Griffiths, Paula L; Johnson, William; Cameron, Noël; Pettifor, John M; Norris, Shane A

    2013-12-01

    Despite the strongly established link between socio-economic status (SES) and health across most stages of the life-course, the evidence for a socio-economic gradient in adolescent health outcomes is less consistent. This paper examines associations between household, school, and neighbourhood SES measures with body composition outcomes in 16 year old South African Black urban adolescents from the 1990 born Birth to Twenty (Bt20) cohort. Multivariable regression analyses were applied to data from a sub-sample of the Bt20 cohort (n=346, 53% male) with measures taken at birth and 16 years of age to establish socio-economic, biological, and demographic predictors of fat mass, lean mass, and body mass index (BMI). Results were compared with earlier published evidence of health inequality at ages 9-10 years in Bt20. Consistent predictors of higher fat mass and BMI in fully adjusted models were being female, born post term, having a mother with post secondary school education, and having an obese mother. Most measures of SES were only weakly associated with body composition, with an inconsistent direction of association. This is in contrast to earlier findings with Bt20 9-10 year olds where SES inequalities in body composition were observed. Findings suggest targeting obesity interventions at females in households where a mother has a high BMI. Copyright © 2013 The Authors. Published by Elsevier B.V. All rights reserved.

  17. Urban Noise Modelling in Boka Kotorska Bay

    Directory of Open Access Journals (Sweden)

    Aleksandar Nikolić

    2014-04-01

    Full Text Available Traffic is the most significant noise source in urban areas. The village of Kamenari in Boka Kotorska Bay is a site where, in a relatively small area, road traffic and sea (ferry traffic take place at the same time. Due to the specificity of the location, i.e. very rare synergy of sound effects of road and sea traffic in the urban area, as well as the expressed need for assessment of noise level in a simple and quick way, a research was conducted, using empirical methods and statistical analysis methods, which led to the creation of acoustic model for the assessment of equivalent noise level (Leq. The developed model for noise assessment in the Village of Kamenari in Boka Kotorska Bay quite realistically provides data on possible noise levels at the observed site, with very little deviations in relation to empirically obtained values.

  18. Urban ecosystem modeling and global change: Potential for rational urban management and emissions mitigation

    International Nuclear Information System (INIS)

    Chen, Shaoqing; Chen, Bin; Fath, Brian D.

    2014-01-01

    Urbanization is a strong and extensive driver that causes environmental pollution and climate change from local to global scale. Modeling cities as ecosystems has been initiated by a wide range of scientists as a key to addressing challenging problems concomitant with urbanization. In this paper, ‘urban ecosystem modeling (UEM)’ is defined in an inter-disciplinary context to acquire a broad perception of urban ecological properties and their interactions with global change. Furthermore, state-of-the-art models of urban ecosystems are reviewed, categorized as top-down models (including materials/energy-oriented models and structure-oriented models), bottom-up models (including land use-oriented models and infrastructure-oriented models), or hybrid models thereof. Based on the review of UEM studies, a future framework for explicit UEM is proposed based the integration of UEM approaches of different scales, guiding more rational urban management and efficient emissions mitigation. - Highlights: • Urban ecosystems modeling (UEM) is defined in an interdisciplinary context. • State-of-the-art models for UEM are critically reviewed and compared. • An integrated framework for explicit UEM is proposed under global change. - State-of-the-art models of urban ecosystem modeling (UEM) are reviewed for rational urban management and emissions mitigation

  19. Social Network Characteristics of Urban Adolescents in Brief Substance Abuse Treatment

    Science.gov (United States)

    Mason, Michael

    2009-01-01

    In this study, the social network characteristics of 102 urban adolescents in brief substance abuse treatment are described and analyzed longitudinally to examine risk and protective mechanisms. The treatment intervention had one session devoted to social support and networks. Social networks were conceptualized and measured along two dimensions…

  20. Technology Use and Self-Perceptions of English Language Skills among Urban Adolescents

    Science.gov (United States)

    Li, Jia; Snow, Catherine; Jiang, Jingjing; Edwards, Nicholas

    2015-01-01

    Technology including social media and other technology applications enabled by different technology devices offer many possibilities for second language learners to improve their learning, if they are interested in doing so. We investigated purposes for using technology among urban adolescents, including both English language learners (ELLs) and…

  1. Menstrual Knowledge and Practices of Female Adolescents in Urban Karachi, Pakistan

    Science.gov (United States)

    Ali, Tazeen Saeed; Rizvi, Syeda Naghma

    2010-01-01

    Menstruation is a normal physiological process that is managed differently according to various social and cultural understandings. Therefore, this cross-sectional study was conducted to explore the menstrual practices among 1275 female adolescents of urban Karachi, Pakistan from April to October 2006 by using interviews. Data was entered and…

  2. Stress, Self-Esteem, Hope, Optimism, and Well-Being in Urban, Ethnic Minority Adolescents

    Science.gov (United States)

    Vacek, Kimberly R.; Coyle, Laura D.; Vera, Elizabeth M.

    2010-01-01

    This study examined hope, optimism, self-esteem, social support, stress, and indices of subjective well-being (SWB) in 137 low-income, urban, ethnic minority adolescents. Hope, optimism, and self-esteem were significant predictors of SWB indices, but stress predicted only 1 SWB index: negative affect. No moderators of stress and negative affect…

  3. Food Safety Is a Key Determinant of Fruit and Vegetable Consumption in Urban Beninese Adolescents

    Science.gov (United States)

    Nago, Eunice S.; Verstraeten, Roosmarijn; Lachat, Carl K.; Dossa, Romain A.; Kolsteren, Patrick W.

    2012-01-01

    Objective: To identify the determinants of fruit and vegetable consumption in urban Beninese adolescents and elements to develop a school-based fruit and vegetable program. Design: Sixteen focus groups conducted with a key word guide. Setting and Participants: Two private and 2 public secondary schools in Cotonou, Benin. One hundred fifty-three…

  4. Gender Differences in Contextual Predictors of Urban, Early Adolescents' Subjective Well-Being

    Science.gov (United States)

    Vera, Elizabeth M.; Moallem, B. Isabel; Vacek, Kimberly R.; Blackmon, Sha'kema; Coyle, Laura D.; Gomez, Kenia L.; Lamp, Kristen; Langrehr, Kimberly J.; Luginbuhl, Paula; Mull, Megan K.; Telander, Kyle J.; Steele, J. Corey

    2012-01-01

    Gender differences in predicting subjective well-being (SWB) were examined in 168 urban adolescents. School satisfaction predicted life satisfaction for boys; for girls, family satisfaction predicted life satisfaction and neighborhood satisfaction predicted negative affect. Self-esteem predicted positive affect for both genders, but friends…

  5. Assessment of difference in physical activities in urban and rural adolescents of Mangalore

    Directory of Open Access Journals (Sweden)

    Rashmi Kundapur

    2017-03-01

    Full Text Available Background: The increasing prevalence of adolescents who are overweight is one of the most pressing public health problems in India. Aims & Objectives: To find the difference in Physical Activities(PA among urban adolescents to that of rural in Mangalore. Materials and Methods: Cross sectional study among high school students using a standard questionnaire (PAQ-A to elicit total hours of PA during the past seven days. Results: Average age of the adolescents was 13.9. We could find 56% boys and 44% girls studying in urban schools and 53.3% boys and 46.6 % girls in rural. Seventy seven percent of the total students do running/jogging as their major PA and 66.6% students do cycling. Only 32.8% students had PA while coming to school every day and it was most common among boys in rural schools (55%. Total PA Score for rural areas was 453.5 with a mean of 3.06(out of 5. For Urban areas, total score was 376.3 with a mean of 2.5 and the difference in proportion was statistically significant. Conclusion: We found that the adolescents studying in the schools of rural areas had better physical activities compared to their urban school counterparts.

  6. Ghetto Fabulous: Reading Black Adolescent Femininity in Contemporary Urban Street Fiction

    Science.gov (United States)

    Marshall, Elizabeth; Staples, Jeanine; Gibson, Simone

    2009-01-01

    In this article the authors provide a general overview of the controversies associated with urban street fiction, a brief introduction to the genre and an introduction to the complex representations of Black adolescent femininity within two contemporary titles, "Black and Ugly" (Styles, 2006) and "Bitch" (King, 2006). The authors provide a…

  7. Subjective Well-Being in Urban Adolescents: Interpersonal, Individual, and Community Influences

    Science.gov (United States)

    Morgan, Melissa L.; Vera, Elizabeth M.; Gonzales, Rufus R.; Conner, Wendy; Vacek, Kim Bena; Coyle, Laura Dick

    2011-01-01

    This study examined the relationship between subjective well-being criteria (negative affect, positive affect, and subjective well-being) and individual, family, friend, school, and neighborhood predictor variables in 159 ethnically diverse, urban adolescents. Results indicated that negative affect was significantly predicted by family variables,…

  8. Contemporary Options for Longitudinal Follow-Up: Lessons Learned from a Cohort of Urban Adolescents

    Science.gov (United States)

    Tobler, Amy L.; Komro, Kelli A.

    2011-01-01

    This study reports efforts to locate and survey participants in Project Northland Chicago (PNC), a longitudinal, group-randomized trial of an alcohol preventive intervention for racial/ethnic minority, urban, early-adolescents, 3-4 years following the end of the intervention. Data were collected annually among students from 6th-8th grade and then…

  9. Prevalence of overweight and obesity among preparatory school adolescents in Urban Sharkia Governorate, Egypt

    Directory of Open Access Journals (Sweden)

    Mohamed A Talat

    2016-03-01

    Conclusion: This study found a relatively high prevalence of overweight and obesity among adolescents aged 12–15 years in urban Sharkia Governorate. Risk factors of overweight and obesity were low level of parent education, faulty feeding habits and physical inactivity.

  10. Acting "Tough" in a "Tough" World: An Examination of Fear among Urban African American Adolescents

    Science.gov (United States)

    Hall, Diane M.; Cassidy, Elaine F.; Stevenson, Howard C.

    2008-01-01

    African American adolescents (132 males and 128 females; age M=14.8 years, SD=0.92) enrolled in an urban community social skills development program participated in a study assessing the relationship among perceptions of family and community social support, fear of calamitous events, depression, and anger expression. Expressing fear of calamitous…

  11. "Spinning Themselves into Poetry": Images of Urban Adolescent Writers in Two Novels for Young Adults

    Science.gov (United States)

    Wissman, Kelly

    2009-01-01

    In contrast to the educational research and policy literature depicting urban adolescents as reluctant and struggling readers and writers, young people in recent young adult novels claim writing as an efficacious practice for self-discovery and social understanding. Analysis of the images of writers and writing in "Locomotion" and "Call Me Maria"…

  12. Urban Dwelling American Indian Adolescent Girls' Beliefs Regarding Health Care Access and Trust.

    Science.gov (United States)

    Saftner, Melissa A; Martyn, Kristy K; Momper, Sandra L

    2014-08-01

    Indigenous people, specifically American Indians (AI), have historically had a greater mistrust of the medical system compared to their White counterparts. The purpose of this paper is to explore the perceptions of AI adolescent girls living in an urban, Midwest area about health care providers, health care systems, and access to health care as related to sexual health care. Using grounded theory methodology, twenty 15-19 year old AI girls participated in talking circles and individual interviews. Two distinct themes emerged related to sexual health care: 1) AI adolescent girls trust their health care providers and the health care system; and 2) Access to health care is critical to practicing safe sex and obtaining information about healthy sexual practices. These findings are unique and may help health care providers and social workers providing care and support to the urban adolescent AI girl.

  13. MODEL OF BRAZILIAN URBANIZATION: GENERAL NOTES

    Directory of Open Access Journals (Sweden)

    Leandro da Silva Guimarães

    2016-07-01

    Full Text Available The full text format seeks to analyze the social inequality in Brazil through the spatial process of that inequality in this sense it analyzes, scratching the edges of what is known of the Brazilian urbanization model and how this same model produced gentrification cities and exclusive. So search the text discuss the country’s urban exclusion through consolidation of what is conventionally called peripheral areas, or more generally, of peripheries. The text on screen is the result of research carried out at the Federal Fluminense University in Masters level. In this study, we tried to understand the genesis of an urban housing development located in São Gonçalo, Rio de Janeiro called Jardim Catarina. Understand what the problem space partner who originated it. In this sense, his analysis becomes consubstantial to understand the social and spatial inequalities in Brazil, as well as the role of the state as planning manager socio-spatial planning and principal agent in the solution of such problems. It is expected that with the realization of a study of greater amounts, from which this article is just a micro work can contribute subsidies that contribute to the arrangement and crystallization of public policies that give account of social inequalities and serve to leverage a country more fair and equitable cities.

  14. Urban Adolescent Girls’ Perspectives on Romantic Relationships: Initiation, Involvement, Negotiation, and Conflict

    Science.gov (United States)

    Volpe, Ellen M.; Morales-Alemán, Mercedes M.; Teitelman, Anne M.

    2015-01-01

    The purpose of this paper was to describe romantic relationships from the perspective of urban, adolescent girls, to address gaps in our understanding of their relationship dimensions. Minority adolescent girls (n = 17) participated in private semi-structured interviews aimed to elicit the understanding of the adolescents’ perspectives on their own relationship experiences and dynamics. The research team conducted conventional content analysis of the interview transcripts. Four major themes emerged about romantic relationships: (1) influence of male pursuit and social norms on relationship initiation factors; (2) a romantic partner is a confidant, friend, and companion; (3) negotiating intimacy respectfully; and (4) relationship conflict through control and abuse. Adolescents described sub-themes of social norms of male pursuit and relationship pressures that dictated relationship initiation. Relationships were depicted by emotional support, caring, and companionship. Adolescents described positive negotiation skills. However, relationship conflict, including controlling behaviors and violence, was illustrated in these same relationships. This study provides a rich description of romantic relationships from the perspectives of urban, adolescent girls. Most salient findings included social pressures and a combination of both positive and negative attributes. Implications include the need for intervention development at the community level to address social pressures, recognition of positive adolescent relationship attributes, and facilitation of skills to identify and address low-quality relationship characteristics. PMID:25259641

  15. Gender differences in risky sexual behavior among urban adolescents exposed to violence.

    Science.gov (United States)

    Collins Fantasia, Heidi; Sutherland, Melissa A; Kelly-Weeder, Susan

    2012-07-01

    The purpose of this study was to use an ecological lens to explore gender differences in risky sexual behavior among urban adolescents exposed to violence. This was a secondary analysis of data from a larger behavioral intervention trial that targeted drinking behaviors among adolescents. Data from a total of 2,560 male and female urban adolescents between the ages of 14 and 21 were analyzed for personal, interpersonal, and community exposure to violence and risky sexual behavior. Violence has an impact on sexual risk. For females, carrying a weapon (p= 0.020) and feeling safe in intimate relationships (p= 0.029) were individual correlates of risky sexual behavior, while for males, race/ethnicity (p= 0.019) and being in a physical fight (p= 0.001) were significant correlates of risky sexual behavior. Risky sexual behavior among adolescents may lead to negative reproductive health outcomes. Nurse practitioners are in an excellent position to affect change in this population through their frequent contact with adolescents in a variety of community and school-based venues. Nurse practitioners are also well-prepared to identify at-risk adolescents and provide them with individualized care, education, and support. ©2012 The Author(s) Journal compilation ©2012 American Academy of Nurse Practitioners.

  16. Socioeconomic and gender differences in adolescents' nutritional status in urban Cameroon, Africa.

    Science.gov (United States)

    Dapi, Léonie N; Janlert, Urban; Nouedoui, Christophe; Stenlund, Hans; Håglin, Lena

    2009-05-01

    The aim of this study was to assess adolescents' nutritional status according to socioeconomic status (SES) and sex using anthropometry in urban Cameroon, Africa. Adolescent boys (n = 248) and girls (n = 333) 12 to 16 years old were recruited from randomly selected schools in a cross sectional study in Yaoundé city and grouped according to SES. Weight, height, skinfold thickness, and circumferences were measured, and body mass index, waist/hip ratio, arm muscle, and arm fat areas were calculated. Stunting, underweight, and overweight were determined using international cutoff points. Adolescents with medium and high SES were less likely to be stunted than adolescents with low SES (odds ratio [OR], 0.40; P underweight (3%, 4%, and 1%) were higher among the adolescents with low and medium SES than those with high SES. Overweight prevalence was high among the adolescents with low (8%), medium (11%), and high (9%) SES. The OR for overweight was higher among girls than boys (OR, 4.13; P underweight than boys (OR, 0.29 [P underweight (5% and 2%) were higher among boys than girls. Pubescent adolescents were less likely to be stunted than nonpubescent (OR, 0.53; P underweight and stunted than adolescents with high SES. Girls were more overweight, less stunted, and underweight than boys.

  17. Understanding complex urban systems multidisciplinary approaches to modeling

    CERN Document Server

    Gurr, Jens; Schmidt, J

    2014-01-01

    Understanding Complex Urban Systems takes as its point of departure the insight that the challenges of global urbanization and the complexity of urban systems cannot be understood – let alone ‘managed’ – by sectoral and disciplinary approaches alone. But while there has recently been significant progress in broadening and refining the methodologies for the quantitative modeling of complex urban systems, in deepening the theoretical understanding of cities as complex systems, or in illuminating the implications for urban planning, there is still a lack of well-founded conceptual thinking on the methodological foundations and the strategies of modeling urban complexity across the disciplines. Bringing together experts from the fields of urban and spatial planning, ecology, urban geography, real estate analysis, organizational cybernetics, stochastic optimization, and literary studies, as well as specialists in various systems approaches and in transdisciplinary methodologies of urban analysis, the volum...

  18. Physical fitness among urban and rural Ecuadorian adolescents and its association with blood lipids: a cross sectional study

    Science.gov (United States)

    2014-01-01

    Background Physical fitness has been proposed as a marker for health during adolescence. Currently, little is known about physical fitness and its association with blood lipid profile in adolescents from low and middle-income countries. The aim of this study is therefore to assess physical fitness among urban and rural adolescents and its associations with blood lipid profile in a middle-income country. Methods A cross-sectional study was conducted between January 2008 and April 2009 in 648 Ecuadorian adolescents (52.3% boys), aged 11 to 15 years, attending secondary schools in Cuenca (urban n = 490) and Nabón (rural n = 158). Data collection included anthropometric measures, application of the EUROFIT battery, dietary intake (2-day 24 h recall), socio-demographic characteristics, and blood samples from a subsample (n = 301). The FITNESGRAM standards were used to evaluate fitness. The associations of fitness and residential location with blood lipid profile were assessed by linear and logistic regression after adjusting for confounding factors. Results The majority (59%) of the adolescents exhibited low levels of aerobic capacity as defined by the FITNESSGRAM standards. Urban adolescents had significantly higher mean scores in five EUROFIT tests (20 m shuttle, speed shuttle run, plate tapping, sit-up and vertical jump) and significantly most favorable improved plasma lipid profile (triglycerides and HDL) as compared to rural adolescents. There was a weak association between blood lipid profile and physical fitness in both urban and rural adolescents, even after adjustment for confounding factors. Conclusions Physical fitness, in our sample of Ecuadorian adolescents, was generally poor. Urban adolescents had better physical fitness and blood lipid profiles than rural adolescents. The differences in fitness did not explain those in blood lipid profile between urban and rural adolescents. PMID:24745348

  19. [Mediation model in adolescent psychology].

    Science.gov (United States)

    Deguitre, Marie; Pascal-Verdelhan, Chantal; Saez, Catherine; Calmels, Marie-Jeanne; Nesensohn, Jessica; Legras, Stéphanie; Paradis, Martine

    2014-01-01

    Body mediation is today used as a tool for establishing a relationship with a young person experiencing psychological suffering. It is particularly useful in adolescence, a period marked by the destabilisation of emotional and relational fields.

  20. Urban farming model in South Jakarta

    Science.gov (United States)

    Indrawati, E.

    2018-01-01

    The development of infrastructure rapidly, large of population and large of urbanization. Meanwhile, agricultural land is decreasing and agricultural production continues to decline. The productive crops is needed for consumption and it is also to improve the environment from oxygen provisioning, antidote to air pollution and to improve soil conditions. The use of yard land for horticultural crops (vegetables, fruits and ornamental plants), spices, medicines, herbs etc. can benefit for the owners of the yard particularly and the general public. The purpose of this research is to identify the model of home yard utilization, mosque yard, office, school, urban park and main road and sub main road, which can improve environmental quality in Pesanggrahan district. The method of analysis used descriptive analysis method by observation. Then analyzed the percentage of the use of yard with productive crops as urban farming. The results showed that the most productive crops were planted in Kelurahan Pesanggrahan 67% which compared with in Kelurahan Ulujami 47%, and in Kelurahan Petukangan Utara 27%. The most types of productive crops were grown as fruit trees and vegetable crops.

  1. Unstructured mesh adaptivity for urban flooding modelling

    Science.gov (United States)

    Hu, R.; Fang, F.; Salinas, P.; Pain, C. C.

    2018-05-01

    Over the past few decades, urban floods have been gaining more attention due to their increase in frequency. To provide reliable flooding predictions in urban areas, various numerical models have been developed to perform high-resolution flood simulations. However, the use of high-resolution meshes across the whole computational domain causes a high computational burden. In this paper, a 2D control-volume and finite-element flood model using adaptive unstructured mesh technology has been developed. This adaptive unstructured mesh technique enables meshes to be adapted optimally in time and space in response to the evolving flow features, thus providing sufficient mesh resolution where and when it is required. It has the advantage of capturing the details of local flows and wetting and drying front while reducing the computational cost. Complex topographic features are represented accurately during the flooding process. For example, the high-resolution meshes around the buildings and steep regions are placed when the flooding water reaches these regions. In this work a flooding event that happened in 2002 in Glasgow, Scotland, United Kingdom has been simulated to demonstrate the capability of the adaptive unstructured mesh flooding model. The simulations have been performed using both fixed and adaptive unstructured meshes, and then results have been compared with those published 2D and 3D results. The presented method shows that the 2D adaptive mesh model provides accurate results while having a low computational cost.

  2. Socioeconomic inequalities and determinants of oral hygiene status among Urban Indian adolescents.

    Science.gov (United States)

    Mathur, Manu Raj; Tsakos, Georgios; Parmar, Priyanka; Millett, Christopher J; Watt, Richard G

    2016-06-01

    To assess the socioeconomic inequalities in oral hygiene and to explore the role of various socioeconomic and psychosocial factors as determinants of these inequalities among adolescents residing in Delhi National Capital Territory. A cross-sectional study was conducted among 1386 adolescents aged 12-15 years from three different socioeconomic groups according to their area of residence (middle-class areas, resettlement colonies and urban slum colonies). Level of oral hygiene was examined clinically using the Simplified Oral Hygiene Index (OHI-S), and an interviewer-administered questionnaire was used to measure key socio-demographic variables and psychosocial and health-related behaviours. Logistic regression analysis tested the association between area of residence and poor oral hygiene. Poor oral hygiene was observed in 50.2% of the adolescents. There was a socioeconomic gradient in poor oral hygiene, with higher prevalence observed at each level of deprivation. These differences were only partly explained, and the differences between adolescent groups remained statistically significant after adjusting for various demographic variables, standard of living, social capital, social support and health-affecting behaviours (OR: 1.96, 95% CI: 1.30-2.76; and OR: 2.50, 95% CI: 1.60-3.92 for adolescents from resettlement colonies and urban slums, respectively, than middle-class adolescents). Area of residence emerged as a strong socioeconomic predictor of prevalence of poor oral hygiene among Indian adolescents. Various material, psychosocial and behavioural factors did not fully explain the observed inequalities in poor oral hygiene among different adolescent groups. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  3. Contemporary patterns of adolescent sexuality in urban Botswana.

    Science.gov (United States)

    Meekers, D; Ahmed, G

    2000-10-01

    In Botswana, as in other areas in southern Africa, there is a growing concern about the risks associated with adolescent sexuality. To facilitate the design of policies that can address these problems, it is necessary to gain a thorough understanding of contemporary patterns of adolescent sexual behaviour, and the factors that affect them. This paper examines these issues using data from the 1995 Botswana Adolescent Reproductive Health Survey in conjunction with data from focus group discussions. The results suggest that adolescents become sexually active at an early age, and that many of them, males and females alike, have multiple sex partners. This early sexual initiation implies that adolescent reproductive health programmes should target youths aged 13 or younger. For school-based programmes this implies starting no later than Grade 6 or Standard 1, and preferably earlier. Young males appear to be a particularly vulnerable group that needs further attention. Adolescents perceive that teachers, peers and parents have the largest influence on their reproductive health attitudes. Schools appear to have the most potential for providing reproductive health information, because they reach youths both directly and indirectly by educating their peers. The results also show that male and female sexual behaviour is affected by different factors. Among males, having secondary education strongly increases the odds of being sexually active, presumably because such males make attractive partners. Among females, on the other hand, being in school significantly reduces the odds of being sexually active. This finding is consistent with the policy imposing a one-year school expulsion for pregnant schoolgirls, which was implemented as a deterrent to schoolgirl pregnancy.

  4. A new assessment method for urbanization environmental impact: urban environment entropy model and its application.

    Science.gov (United States)

    Ouyang, Tingping; Fu, Shuqing; Zhu, Zhaoyu; Kuang, Yaoqiu; Huang, Ningsheng; Wu, Zhifeng

    2008-11-01

    The thermodynamic law is one of the most widely used scientific principles. The comparability between the environmental impact of urbanization and the thermodynamic entropy was systematically analyzed. Consequently, the concept "Urban Environment Entropy" was brought forward and the "Urban Environment Entropy" model was established for urbanization environmental impact assessment in this study. The model was then utilized in a case study for the assessment of river water quality in the Pearl River Delta Economic Zone. The results indicated that the assessing results of the model are consistent to that of the equalized synthetic pollution index method. Therefore, it can be concluded that the Urban Environment Entropy model has high reliability and can be applied widely in urbanization environmental assessment research using many different environmental parameters.

  5. Association between adolescent drinking and adult violence: evidence from a longitudinal study of urban African Americans.

    Science.gov (United States)

    Green, Kerry M; Doherty, Elaine E; Zebrak, Katarzyna A; Ensminger, Margaret E

    2011-09-01

    This study examined the relationship between adolescent alcohol use and adult violence from a developmental perspective, specifically whether frequent adolescent drinking predicts adult violence once shared risk factors are taken into account through propensity score matching. The research considered multiple types of violence, including assault, robbery, and suicidal behavior, as well as other types of offending. It tested whether educational attainment and adult alcohol use and problems contribute to the adolescent drinking-adult violence relationship. Data came from a longitudinal epidemiological study of a community cohort of urban African Americans followed from age 6 to 42 (N = 702; 51% female). Frequent adolescent drinking was operationalized as 20 times or more by age 16. Data on violent arrests and offenses were collected throughout adulthood from self-reports and official criminal records. Matching variables came from childhood and adolescence and included such shared risk factors as childhood externalizing behaviors, school achievement, and family functioning. Adjusted logistic regression analyses on the sample matched on childhood and adolescent risk factors showed that frequent adolescent drinking was associated with an increased risk of violence in young adulthood (in particular assault) but not with other types of crime, self-directed violence, or violence in midlife. Findings varied by gender. Heavy episodic drinking in adulthood seemed to account for some of the association between frequent adolescent drinking and adult assault. The results of this study suggest that preventing frequent adolescent drinking could potentially decrease adult assault. This study adds to the growing body of literature suggesting long-term negative consequences of adolescent alcohol use.

  6. Association Between Adolescent Drinking and Adult Violence: Evidence From a Longitudinal Study of Urban African Americans*

    Science.gov (United States)

    Green, Kerry M.; Doherty, Elaine E.; Zebrak, Katarzyna A.; Ensminger, Margaret E.

    2011-01-01

    Objective: This study examined the relationship between adolescent alcohol use and adult violence from a developmental perspective, specifically whether frequent adolescent drinking predicts adult violence once shared risk factors are taken into account through propensity score matching. The research considered multiple types of violence, including assault, robbery, and suicidal behavior, as well as other types of offending. It tested whether educational attainment and adult alcohol use and problems contribute to the adolescent drinking–adult violence relationship. Method: Data came from a longitudinal epidemiological study of a community cohort of urban African Americans followed from age 6 to 42 (N = 702; 51% female). Frequent adolescent drinking was operationalized as 20 times or more by age 16. Data on violent arrests and offenses were collected throughout adulthood from self-reports and official criminal records. Matching variables came from childhood and adolescence and included such shared risk factors as childhood externalizing behaviors, school achievement, and family functioning. Results: Adjusted logistic regression analyses on the sample matched on childhood and adolescent risk factors showed that frequent adolescent drinking was associated with an increased risk of violence in young adulthood (in particular assault) but not with other types of crime, self-directed violence, or violence in midlife. Findings varied by gender. Heavy episodic drinking in adulthood seemed to account for some of the association between frequent adolescent drinking and adult assault. Conclusions: The results of this study suggest that preventing frequent adolescent drinking could potentially decrease adult assault. This study adds to the growing body of literature suggesting long-term negative consequences of adolescent alcohol use. PMID:21906497

  7. Adolescent Psychosocial Development: A Review of Longitudinal Models and Research

    Science.gov (United States)

    Meeus, Wim

    2016-01-01

    This review used 4 types of longitudinal models (descriptive models, prediction models, developmental sequence models and longitudinal mediation models) to identify regular patterns of psychosocial development in adolescence. Eight patterns of adolescent development were observed across countries: (1) adolescent maturation in multiple…

  8. The relationship between religiosity and adjustment among African-American, female, urban adolescents.

    Science.gov (United States)

    Ball, Joanna; Armistead, Lisa; Austin, Barbara-jeanne

    2003-08-01

    African-American female adolescents living in urban environments are at risk for adverse adjustment outcomes, and thus it is imperative to identify protective factors. Religion has been found to be a significant protective resource against many types of maladaptive adjustment outcomes among adolescent samples. The present study accomplishes the following: (1) Provides a description of religiosity in a sample of African-American female teens; (2) examines religion as a resource for these adolescents by focusing on the association between religiosity and sexual activity, self-esteem, and general psychological functioning. Four-hundred ninety-two African-American females, ages 12-19, completed measures on religiosity, sexual activity, self-esteem, and psychological functioning. Most of the adolescents identified as Christian, reported a belief in God, and attended religious services. Greater overall religiosity was associated with greater self-esteem and better psychological functioning. Adolescents at different levels of self-religiosity, as well as family religiosity, evidenced significantly different self-esteem but not psychological distress or sexual activity. Adolescents with varying levels of church attendance demonstrated differences on all three outcomes. By identifying the ways in which religion may exert a positive impact on African-American female teens, mental health professionals can design interventions that have the potential to help improve the quality of life for these adolescents.

  9. Early to bed: a study of adaptation among sexually active urban adolescent girls younger than age sixteen

    NARCIS (Netherlands)

    Martin, A.; Ruchkin, V.; Caminis, A.; Vermeiren, R; Henrich, C.C.; Schwab-Stone, M.

    2005-01-01

    Objective: To examine the association between sexual activity among urban adolescent girls and four global measures of psychosocial adaptation (academic motivation, school achievement, depressive symptoms, and expectations about the future). Method: Data derived from the Social and Health

  10. Body Mass Index Of Nigerian Adolescent Urban Secondary School Girls

    Directory of Open Access Journals (Sweden)

    Onyiriuka Alphonsus N.

    2015-06-01

    Full Text Available Background and Aims: Body mass index (BMI is an inexpensive and easy-to-perform method of screening for weight status, which may have detrimental health consequences. The aim of our study was to assess the pattern of BMI among Nigerian adolescent secondary school girls and determine the prevalence of underweight, overweight and obesity among them.

  11. Weight status and eating habits of adolescent Nigerian urban ...

    African Journals Online (AJOL)

    food products and to fast foods, largely owing to peer group influence. As a consequence, their food habits tend to be dynamic and change with time. In view of the fact that the outcome of drug therapy to curb overeating and obesity in adolescent girls is generally poor, efforts to halt the escalating prevalence of obesity in this ...

  12. Adolescents' Perceptions of HIV/AIDS Pandemic in Enugu Urban ...

    African Journals Online (AJOL)

    The adolescents' perception about HIV/AIDS pandemic is the main focus of this study. The study sought to find the perceptions of male and female secondary school students and its relevance to the counseling profession. Three research questions and a null hypothesis was formulated to guide the study. The study sample ...

  13. Ecological momentary assessment of urban adolescents' technology use and cravings for unhealthy snacks and drinks: differences by ethnicity and sex.

    Science.gov (United States)

    Borgogna, Nicholas; Lockhart, Ginger; Grenard, Jerry L; Barrett, Tyson; Shiffman, Saul; Reynolds, Kim D

    2015-05-01

    Adolescents' technology use is generally associated with food cravings, but it is not clear whether specific types of technology elicit particular types of cravings or whether personal characteristics play a role in these associations. We examined whether momentary associations between four technology types (ie, television, video games, computer messaging, and phone messaging) and cravings for unhealthy snack foods and sweetened drinks were moderated by youths' sex, ethnicity, body mass index, and age. Urban adolescents (N=158) aged 14 to 17 years provided momentary information about their technology use and food cravings during the course of 1 week and completed survey reports of their personal characteristics. We used multilevel modeling to determine momentary associations and interactions. Non-Hispanic adolescents showed stronger associations between television exposure and cravings for sweet snacks, salty snacks, and sweetened drinks. Being Hispanic was associated with stronger associations between phone messaging and cravings for sweet snacks, salty snacks, and sweetened drinks. Males showed stronger associations between video game use and salty snack cravings. As the public health field continues to monitor the effects of technology use on adolescents' eating and overall health, it will be important to determine the extent to which these groups are differentially affected by different forms of technology. Copyright © 2015 Academy of Nutrition and Dietetics. Published by Elsevier Inc. All rights reserved.

  14. Effect of urbanization on objectively measured physical activity levels, sedentary time, and indices of adiposity in Kenyan adolescents.

    Science.gov (United States)

    Ojiambo, Robert M; Easton, Chris; Casajús, Jose A; Konstabel, Kenn; Reilly, John J; Pitsiladis, Yannis

    2012-01-01

    Urbanization affects lifestyles in the developing world but no studies have assessed the impact on objectively measured physical activity in children and adolescents from sub-Saharan Africa. To compare objectively measured habitual physical activity, sedentary time, and indices of adiposity in adolescents from rural and urban areas of Kenya. Physical activity and sedentary time were assessed by accelerometry for 5 consecutive days in 97 (50 female and 47 male) rural and 103 (52 female and 51 male) urban adolescents (mean age 13 ± 1 years). Body Mass Index (BMI) and BMI z-scores were used to assess adiposity. Rural males spent more time in moderate-to-vigorous intensity physical activity (MVPA) compared with urban males (68 ± 22 vs. 50 ± 17 min, respectively; P urban females (62 ± 20 vs. 37 ± 20 min, respectively; P urban subjects. Residence (rural vs. urban) significantly (P urban adolescents and this is a likely reflection of the impact of urbanization on lifestyle in Kenya.

  15. Dietary Habits and Eating Practices and Their Association with Overweight and Obesity in Rural and Urban Black South African Adolescents

    OpenAIRE

    Modiehi Heather Sedibe; Pedro T. Pisa; Alison B. Feeley; Titilola M. Pedro; Kathleen Kahn; Shane A. Norris

    2018-01-01

    The aim of this study was to investigate differences/similarities in dietary habits and eating practices between younger and older, rural and urban South African adolescents in specific environments (home, community and school) and their associations with overweight and obesity. Dietary habits, eating practices, and anthropometric measurements were performed on rural (n = 392, mean age = 13 years) and urban (n = 3098, mean age = 14 years) adolescents. Logistic regression analysis was used to ...

  16. UNMET NEED OF SEX EDUCATION AMONG ADOLESCENTS IN URBAN SLUM AREA: AN INTERVENTIONAL STUDY

    Directory of Open Access Journals (Sweden)

    Tamboli Kshitij S, Avachat Subhada S, Tamboli Suchit S

    2015-07-01

    Full Text Available Context: Adolescents comprise one-fifth of India’s total population. There is widespread ignorance associated with unprotected sex, contraceptives, among young people. As majority adolescents in slum areas have illiterate and ignorant family backgrounds; they are misguided by the myths. Hence providing sex education for them is the need of the hour. Aims: 1 To assess the knowledge and awareness of adolescents in an urban slum area regarding some aspects of reproductive health. 2 To assess the need of sex education among them. 3 To study the impact of sex education on their knowledge Material and Methods: An interventional study was done on 132 adolescents of urban slum area, selected by simple random sampling. Informed consent was obtained from the participants. Data was collected with the help of structured questionnaire prepared by literature search. Response of adolescents was recorded through questionnaires. A sensitization workshop was organized as intervention. The same questionnaire was given to them and the effect of intervention was assessed. Statistical analysis of data was done using percentage, proportion and appropriate tests of significance. Result and Conclusions: Only 31.06% adolescents had discussed the topic of reproductive health with some or other person and out of them friends were the major sources (39.2% of information. Only 38.63% knew the hazards of teenage pregnancy which significantly rose to 89.4% after intervention workshop. The study concludes that the slum adolescents profoundly lack adequate knowledge of sexuality related matters. Even before intervention workshop, unmet need of reproductive health education was 59.1% and 93.93% was the felt need in the post test.

  17. Modeling Urban Spatial Growth in Mountainous Regions of Western China

    Directory of Open Access Journals (Sweden)

    Guoping Huang

    2017-08-01

    Full Text Available The scale and speed of urbanization in the mountainous regions of western China have received little attention from researchers. These cities are facing rapid population growth and severe environmental degradation. This study analyzed historical urban growth trends in this mountainous region to better understand the interaction between the spatial growth pattern and the mountainous topography. Three major factors—slope, accessibility, and land use type—were studied in light of their relationships with urban spatial growth. With the analysis of historical data as the basis, a conceptual urban spatial growth model was devised. In this model, slope, accessibility, and land use type together create resistance to urban growth, while accessibility controls the sequence of urban development. The model was tested and evaluated using historical data. It serves as a potential tool for planners to envision and assess future urban growth scenarios and their potential environmental impacts to make informed decisions.

  18. Modeling Global Urbanization Supported by Nighttime Light Remote Sensing

    Science.gov (United States)

    Zhou, Y.

    2015-12-01

    Urbanization, a major driver of global change, profoundly impacts our physical and social world, for example, altering carbon cycling and climate. Understanding these consequences for better scientific insights and effective decision-making unarguably requires accurate information on urban extent and its spatial distributions. In this study, we developed a cluster-based method to estimate the optimal thresholds and map urban extents from the nighttime light remote sensing data, extended this method to the global domain by developing a computational method (parameterization) to estimate the key parameters in the cluster-based method, and built a consistent 20-year global urban map series to evaluate the time-reactive nature of global urbanization (e.g. 2000 in Fig. 1). Supported by urban maps derived from nightlights remote sensing data and socio-economic drivers, we developed an integrated modeling framework to project future urban expansion by integrating a top-down macro-scale statistical model with a bottom-up urban growth model. With the models calibrated and validated using historical data, we explored urban growth at the grid level (1-km) over the next two decades under a number of socio-economic scenarios. The derived spatiotemporal information of historical and potential future urbanization will be of great value with practical implications for developing adaptation and risk management measures for urban infrastructure, transportation, energy, and water systems when considered together with other factors such as climate variability and change, and high impact weather events.

  19. Recognizing Internet Addiction: Prevalence and Relationship to Academic Achievement in Adolescents Enrolled in Urban and Rural Greek High Schools

    Science.gov (United States)

    Stavropoulos, Vasilis; Alexandraki, Kiriaki; Motti-Stefanidi, Frosso

    2013-01-01

    This study aims: a) to estimate the prevalence of internet addiction among adolescents of urban and rural areas in Greece, b) to examine whether the Internet Addiction Test cut-off point is applicable to them and c) to investigate the phenomenon's association with academic achievement. Participants were 2090 adolescents (mean age 16, 1036 males,…

  20. Urban Land Allocation Model of Territorial Expansion by Urban Planners and Housing Developers

    Directory of Open Access Journals (Sweden)

    Carolina Cantergiani

    2017-12-01

    Full Text Available Agent-based models have recently been proposed as potential tools to support urban planning due to their capacity to simulate complex behaviors. The complexity of the urban development process arises from strong interactions between various components driven by different agents. AMEBA (agent-based model for the evolution of urban areas is a prototype of an exploratory, spatial, agent-based model that considers the main agents involved in the urban development process (urban planners, developers, and the population. The prototype consists of three submodels (one for each agent that have been developed independently and present the same structure. However, the first two are based on a land use allocation technique, and the last one, as well as their integration, on an agent-based model approach. This paper describes the conceptualization and performance of the submodels that represent urban planners and developers, who are the agents responsible for officially launching expansion and defining the spatial allocation of urban land. The prototype was tested in the Corredor del Henares (an urban–industrial area in the Region of Madrid, Spain, but is sufficiently flexible to be adapted to other study areas and generate different future urban growth contexts. The results demonstrate that this combination of agents can be used to explore various policy-relevant research questions, including urban system interactions in adverse political and socioeconomic scenarios.

  1. Urban growth modeling to predict the changes in the urban microclimate and urban water cycle

    NARCIS (Netherlands)

    Veerbeek, W.; Denekew, H.B.; Pathirana, A.; Brdjanovic, T.; Zevenbergen, C.; Kuzniecow Bacchin, T.

    2011-01-01

    The consequences of urban growth on the exposure, sensitivity but also as a driver of flooding are often underexposed. Yet, the rate of current urbanization is unprecedented and might increase future flood risk dramatically. To gain insight in this issue, a study on urban development has been

  2. Urban Growth Modeling to Predict the Changes in the Urban Microclimate and Urban Water Cycle

    NARCIS (Netherlands)

    Veerbeek, W.; Denekew, H.; Pathirana, A.; Brdjanovic, D.; Zevenbergen, C.; Bacchin, T.K.

    2011-01-01

    The consequences of urban growth on the exposure, sensitivity but also as a driver of flooding are often underexposed. Yet, the rate of current urbanization is unprecedented and might increase future flood risk dramatically. To gain insight in this issue, a study on urban development has been

  3. Physical fitness and anthropometric characteristics among adolescents living in urban or rural areas of Kosovo.

    Science.gov (United States)

    Tishukaj, Faton; Shalaj, Ismet; Gjaka, Masar; Ademi, Besim; Ahmetxhekaj, Rrustem; Bachl, Norbert; Tschan, Harald; Wessner, Barbara

    2017-09-16

    High physical fitness levels in childhood and adolescence are associated with positive health-related outcomes later in life. Albeit many researchers investigated rural-urban differences in physical fitness, the outcomes of these studies are inconsistent and data on Kosovo are widely missing. Thus, this study aims to examine anthropometric and physical fitness parameters in 14 to 15 year old Kosovan adolescents living in rural and urban areas. Two schools from Pristina (mostly urban population) and two schools in the surrounding villages of the district of Deçan (mostly rural population) were selected. Anthropometric and physical fitness parameters were determined from a total of 354 adolescents (216 urban: 14.5 ± 0.4 years, 138 rural: age 14.5 ± 0.4 years) who volunteered to participate in this cross-sectional study performed in 2013/14. The prevalence of overweight and obesity was 18.9% in girls and 28.2% in males and excess body fat was detected in 18.2% of the girls and 15.9% of the boys with no differences between rural and urban adolescents. Rural adolescents performed slightly better in relative handgrip strength (+4.7%, p = 0.032) and running speed (10 m: +2.2%, p = 0.012; 20 m: +1.9%, p = 0.035), but no other differences were detected in standing long jump, counter movement jump, cardiorespiratory fitness and sit and reach test. A multinomial logistic regression analysis revealed that being a female was associated with a lower relative risk for overweight (RR = 0.11, 95% CI: 0.03-0.34, p fitness were associated with a higher relative risk for overweight and excess body fat. In contrast, lower handgrip strength increased the risk for experiencing thinness (RR = 0.92, 95% CI: 0.89-0.96, p < 0.001). It could be shown that there is a high prevalence of overweight and obesity, especially in 14 to 15 year old boys in Kosovo which does not differ between rural and urban areas. Worse physical performance is associated with a higher risk

  4. Modeling Urban Energy Savings Scenarios Using Earth System Microclimate and Urban Morphology

    Science.gov (United States)

    Allen, M. R.; Rose, A.; New, J. R.; Yuan, J.; Omitaomu, O.; Sylvester, L.; Branstetter, M. L.; Carvalhaes, T. M.; Seals, M.; Berres, A.

    2017-12-01

    We analyze and quantify the relationships among climatic conditions, urban morphology, population, land cover, and energy use so that these relationships can be used to inform energy-efficient urban development and planning. We integrate different approaches across three research areas: earth system modeling; impacts, adaptation and vulnerability; and urban planning in order to address three major gaps in the existing capability in these areas: i) neighborhood resolution modeling and simulation of urban micrometeorological processes and their effect on and from regional climate; ii) projections for future energy use under urbanization and climate change scenarios identifying best strategies for urban morphological development and energy savings; iii) analysis and visualization tools to help planners optimally use these projections.

  5. The environment and urban adolescents' use of recreational facilities for physical activity: a qualitative study.

    Science.gov (United States)

    Ries, Amy V; Gittelsohn, Joel; Voorhees, Carolyn C; Roche, Kathleen M; Clifton, Kelly J; Astone, Nan M

    2008-01-01

    Investigate environmental factors influencing the use of recreational facilities for physical activity by urban African-American adolescents. Qualitative in-depth interviews and direct observation. Two public high schools and 24 public recreational facilities in Baltimore, Maryland. Forty-eight African-American adolescents aged 14 to 18 years. Data from 48 in-depth interviews and 26 observations were coded using NVivo software and analyzed using the constant comparative method. Facility use is influenced by characteristics of the physical, social, organizational, and economic environments. Adolescents are attracted to low-cost, well-maintained facilities that offer preferred activities and that are within close proximity to home. Adolescents with limited access to facilities use alternative play spaces, like the streets or vacant lots, where they risk injury from falling or being hit by a car. They are drawn to facilities where they find active adolescents, and they avoid those where young people are engaged in drug or gang activity. Concerns about facility safety largely determine use, particularly for adolescent girls. Previous research points to the importance of increasing facility availability as a means of promoting physical activity, particularly in minority communities in which availability is disproportionately limited. This study shows that, while availability is important, additional facility characteristics should be considered when using environmental change to promote facility use for physical activity.

  6. Defining the Model for Urban Teacher Preparation

    Science.gov (United States)

    Waddell, Jennifer; Edwards, Linda; Underwood, Edward

    2008-01-01

    The School of Education at the University of Missouri-Kansas City is addressing the urban teacher retention challenge through its Institute for Urban Education (IUE). IUE focuses on recruiting individuals from underrepresented populations who have a commitment to their urban communities. Its curriculum is distinguished by five features: (1) an…

  7. Urban Dwelling American Indian Adolescent Girls’ Beliefs Regarding Health Care Access and Trust

    OpenAIRE

    Saftner, Melissa A.; Martyn, Kristy K.; Momper, Sandra L.

    2014-01-01

    Indigenous people, specifically American Indians (AI), have historically had a greater mistrust of the medical system compared to their White counterparts. The purpose of this paper is to explore the perceptions of AI adolescent girls living in an urban, Midwest area about health care providers, health care systems, and access to health care as related to sexual health care. Using grounded theory methodology, twenty 15-19 year old AI girls participated in talking circles and individual interv...

  8. Alcohol Use and Related Behaviors among Late-Adolescent Urban Youths: Peer and Parent Influences

    Science.gov (United States)

    Schwinn, Traci M.; Schinke, Steven P.

    2014-01-01

    Peer and parent influences on alcohol use and related risky behaviors were examined in a sample of late-adolescent (M = 17.3 years; SD = 1.11 years) urban youths. Participants (N = 400) completed an online measure assessing peer influences of alcohol use and alcohol offers and also parental influences of rules against alcohol use and perceived…

  9. Longitudinal relations between adolescent and parental behaviors, parental knowledge, and internalizing behaviors among urban adolescents.

    Science.gov (United States)

    Garthe, Rachel C; Sullivan, Terri; Kliewer, Wendy

    2015-04-01

    High prevalence rates of depression and anxiety among adolescents underscore the importance of identifying parental and adolescent behaviors that may lessen the risk for these outcomes. Previous research has shown that parental acceptance, parental knowledge, and child disclosure are negatively associated with internalizing behaviors. It is also important to explore the impact of internalizing behaviors on these parental and child constructs. The current study examined longitudinal relationships between parental acceptance, parental knowledge, child disclosure, and internalizing symptoms across a one-year time period. Participants were 358 adolescents (54 % female) and their primary caregivers, who were primarily African American (92 %). Parents and adolescents provided data through face-to-face interviews. Results showed that parental knowledge and parental acceptance predicted child disclosure, and child disclosure predicted parental knowledge one year later. Higher levels of parental acceptance predicted lower levels of adolescent-reported depressive symptoms, while higher levels of parental report of adolescents' internalizing symptoms predicted lower levels of parental knowledge. No differences in the strength of these relationships were found across grade or gender. These findings highlight the role of the adolescent's perceived acceptance by parents in promoting children's disclosure, and the benefits of parental acceptance in decreasing depressive symptoms over time. Overall, these results show the impact that both adolescent and parental behaviors and internalizing behaviors have on each other across time.

  10. Urban-Water Harmony model to evaluate the urban water management.

    Science.gov (United States)

    Ding, Yifan; Tang, Deshan; Wei, Yuhang; Yin, Sun

    2014-01-01

    Water resources in many urban areas are under enormous stress due to large-scale urban expansion and population explosion. The decision-makers are often faced with the dilemma of either maintaining high economic growth or protecting water resources and the environment. Simple criteria of water supply and drainage do not reflect the requirement of integrated urban water management. The Urban-Water Harmony (UWH) model is based on the concept of harmony and offers a more integrated approach to urban water management. This model calculates four dimensions, namely urban development, urban water services, water-society coordination, and water environment coordination. And the Analytic Hierarchy Process has been used to determine the indices weights. We applied the UWH model to Beijing, China for an 11-year assessment. Our findings show that, despite the severe stress inherent in rapid development and water shortage, the urban water relationship of Beijing is generally evolving in a positive way. The social-economic factors such as the water recycling technologies contribute a lot to this change. The UWH evaluation can provide a reasonable analysis approach to combine various urban and water indices to produce an integrated and comparable evaluation index. This, in turn, enables more effective water management in decision-making processes.

  11. Bullying among adolescents in a Brazilian urban center - "Health in Beagá" Study.

    Science.gov (United States)

    da Costa, Michelle Ralil; Xavier, César Coelho; Andrade, Amanda Cristina de Souza; Proietti, Fernando Augusto; Caiaffa, Waleska Teixeira

    2015-01-01

    To analyze the prevalence of bullying and its associated factors in Brazilian adolescents. Data were used from a population-based household survey conducted by the Urban Health Observatory (OSUBH) utilizing probability sampling in three stages: census tracts, residences, and individuals. The survey included 598 adolescents (14-17 years old) who responded questions on bullying, sociodemographic characteristics, health-risk behaviors, educational well-being, family structure, physical activity, markers of nutritional habits, and subjective well-being (body image, personal satisfaction, and satisfaction with their present and future life). Univariate and multivariate analysis was done using robust Poisson regression. The prevalence of bullying was 26.2% (28.0% among males, 24.0% among females). The location of most bullying cases was at or on route to school (70.5%), followed by on the streets (28.5%), at home (9.8%), while practicing sports (7.3%), at parties (4.6%), at work (1.7%), and at other locations (1.6%). Reports of bullying were associated with life dissatisfaction, difficulty relating to parents, involvement in fights with peers and insecurity in the neighborhood. A high prevalence of bullying among participating adolescents was found, and the school serves as the main bullying location, although other sites such as home, parties and workplace were also reported. Characteristics regarding self-perception and adolescent perceptions of their environment were also associated with bullying, thus advancing the knowledge of this type of violence, especially in urban centers of developing countries.

  12. A study of anemia among adolescent females in the urban area of nagpur.

    Science.gov (United States)

    Chaudhary, Sanjeev M; Dhage, Vasant R

    2008-10-01

    To estimate the prevalence of anemia among adolescent females and to study the socio-demographic factors associated with anemia. A cross-sectional survey was conducted in an urban area under Urban Health Training Center, Department of Preventive and Social Medicine, Government Medical College and Hospital, Nagpur. A total of 296 adolescent females (10-19 years old) were included in this study. The study took place from October 2002 to March 2003 (6 months). Statistical analyses were done using percentage, standard error of proportion, Chi-square test, and Student's 't' test. The prevalence of anemia was found to be 35.1%. A significant association of anemia was found with socio-economic status and literacy status of parents. Mean height and weight of subjects with anemia was significantly less than subjects without anemia. A high prevalence of anemia among adolescent females was found, which was higher in the lower socio-economic strata and among those whose parents were less educated. It was seen that anemia affects the overall nutritional status of adolescent females.

  13. A study of anemia among adolescent females in the urban area of Nagpur

    Directory of Open Access Journals (Sweden)

    Chaudhary Sanjeev

    2008-01-01

    Full Text Available Objectives: To estimate the prevalence of anemia among adolescent females and to study the socio-demographic factors associated with anemia. Materials and Methods: A cross-sectional survey was conducted in an urban area under Urban Health Training Center, Department of Preventive and Social Medicine, Government Medical College and Hospital, Nagpur. A total of 296 adolescent females (10-19 years old were included in this study. The study took place from October 2002 to March 2003 (6 months. Statistical analyses were done using percentage, standard error of proportion, Chi-square test, and Student′s ′t′ test. Results: The prevalence of anemia was found to be 35.1%. A significant association of anemia was found with socio-economic status and literacy status of parents. Mean height and weight of subjects with anemia was significantly less than subjects without anemia. Conclusions: A high prevalence of anemia among adolescent females was found, which was higher in the lower socio-economic strata and among those whose parents were less educated. It was seen that anemia affects the overall nutritional status of adolescent females.

  14. Modeling Criminal Activity in Urban Landscapes

    Science.gov (United States)

    Brantingham, Patricia; Glässer, Uwe; Jackson, Piper; Vajihollahi, Mona

    Computational and mathematical methods arguably have an enormous potential for serving practical needs in crime analysis and prevention by offering novel tools for crime investigations and experimental platforms for evidence-based policy making. We present a comprehensive formal framework and tool support for mathematical and computational modeling of criminal behavior to facilitate systematic experimental studies of a wide range of criminal activities in urban environments. The focus is on spatial and temporal aspects of different forms of crime, including opportunistic and serial violent crimes. However, the proposed framework provides a basis to push beyond conventional empirical research and engage the use of computational thinking and social simulations in the analysis of terrorism and counter-terrorism.

  15. Measured body mass index, body weight perception, dissatisfaction and control practices in urban, low-income African American adolescents

    Directory of Open Access Journals (Sweden)

    Chen Xiaoli

    2009-06-01

    Full Text Available Abstract Background Current understanding of the associations between actual body weight status, weight perception, body dissatisfaction, and weight control practices among low-income urban African American adolescents is limited. The knowledge can help direct future intervention efforts. Methods Cross-sectional data including measured weight and height and self-reported weight status collected from 448 adolescents in four Chicago Public Schools were used. Results The prevalence of overweight and obesity (BMI ≥ 85th percentile was 39.8%, but only 27.2% considered themselves as obese, although 43.4% reported trying to lose weight. Girls were more likely to express weight dissatisfaction than boys, especially those with BMI ≥ 95th percentile (62.9% vs. 25.9%. BMI ≥ 85th percentile girls were more likely to try to lose weight than boys (84.6% vs. 66.7%. Among all adolescents, 27.2% underestimated and 67.2% correctly judged their own weight status. Multinomial logistic models show that those with BMI ≥ 85th percentile, self-perceived as obese, or expressed body dissatisfaction were more likely to try to lose weight; adjusted odds ratios and 95% confidence intervals were 4.52 (2.53–8.08, 18.04 (7.19–45.30, 4.12 (1.64–10.37, respectively. No significant differences were found in diet and physical activity between those trying to lose weight and those not trying, but boys who reported trying to lose weight still spent more television time (P Conclusion Gender differences in weight perception, body dissatisfaction, and weight control practices exist among African American adolescents. One-third did not appropriately classify their weight status. Weight perception and body dissatisfaction are correlates of weight control practices. Adolescents attempting to lose weight need be empowered to make adequate desirable behavioral changes.

  16. Modeling Exposure to Heat Stress with a Simple Urban Model

    Directory of Open Access Journals (Sweden)

    Peter Hoffmann

    2018-01-01

    Full Text Available As a first step in modeling health-related urban well-being (UrbWellth, a mathematical model is constructed that dynamically simulates heat stress exposure of commuters in an idealized city. This is done by coupling the Simple Urban Radiation Model (SURM, which computes the mean radiant temperature ( T m r t , with a newly developed multi-class multi-mode traffic model. Simulation results with parameters chosen for the city of Hamburg for a hot summer day show that commuters are potentially most exposed to heat stress in the early afternoon when T m r t has its maximum. Varying the morphology with respect to street width and building height shows that a more compact city configuration reduces T m r t and therefore the exposure to heat stress. The impact resulting from changes in the city structure on traffic is simulated to determine the time spent outside during the commute. While the time in traffic jams increases for compact cities, the total commuting time decreases due to shorter distances between home and work place. Concerning adaptation measures, it is shown that increases in the albedo of the urban surfaces lead to an increase in daytime heat stress. Dramatic increases in heat stress exposure are found when both, wall and street albedo, are increased.

  17. DOES RURAL-TO-URBAN MIGRATION PLACE ADOLESCENTS AT RISK OF DELETERIOUS SEXUAL AND REPRODUCTIVE HEALTH OUTCOMES? EVIDENCE FROM HAITI.

    Science.gov (United States)

    Heckert, Jessica

    2016-11-01

    This study examines the links between migration and sexual and reproductive health among rural-to-urban migrant youth in Haiti. It evaluates behavioural, knowledge and attitudinal components from the perspective of three competing explanations for migrants' behaviours: adaptation, disruption and selection. Discrete-time event history analysis is employed to compare these hypotheses using Haiti Demographic and Health Survey data (N=1215 adolescent girls, N=829 adolescent boys). Multi-level models are used to compare changes in knowledge and attitudes in individuals using data from the Haiti Youth Transitions Study (N=223). The findings reveal that disruption is the most plausible explanation for the timing of migration and first sex among girls. However, contrary to the assumption that migrant youth risk experiencing first sex earlier, girls are less likely to experience first sex near the time they migrate, and rural-to-urban migrant boys may experience first sex at later ages. The high aspirations of migrant youth provide a likely explanation for these findings. Furthermore, male migrants accumulate less protective knowledge, which is consistent with the disruption hypothesis, and migrants endorse premarital sex similarly to non-migrants. Sexual and reproductive health curricula should be adapted to the unique needs of migrant youth, and youth should be targeted before they migrate.

  18. Urban Modality : Modelling and evaluating the sustainable mobility of urban areas in the city-region

    NARCIS (Netherlands)

    Gil, J.A.

    2016-01-01

    This thesis proposes a framework for evaluating the mobility potential and performance of urban areas in the city region, as an instrument to support urban development that contributes positively to regional sustainable mobility objectives. The research takes a quantitative approach, modelling and

  19. A critical review of integrated urban water modellingUrban drainage and beyond

    DEFF Research Database (Denmark)

    Bach, Peter M.; Rauch, Wolfgang; Mikkelsen, Peter Steen

    2014-01-01

    Modelling interactions in urban drainage, water supply and broader integrated urban water systems has been conceptually and logistically challenging as evidenced in a diverse body of literature, found to be confusing and intimidating to new researchers. This review consolidates thirty years of re...

  20. Adolescent experiences of violence and relation to violence perpetration beyond young adulthood among an urban sample of Black and African American males.

    Science.gov (United States)

    Reed, Elizabeth; Lawrence, Danielle A; Santana, M C; Welles, C Seth L; Horsburgh, C Robert; Silverman, Jay G; Rich, John A; Raj, Anita

    2014-02-01

    The purpose of this study is to determine if experiences of physical violence during early and late adolescence (12-21 years) places urban Black males at increased risk for interpersonal violence perpetration beyond young adulthood (30 years and older). Participants of this cross-sectional study were Black and African American men (N = 455) between the ages of 30 and 65 years, recruited from four urban clinical sites in the Northeast. Multivariate logistic regression models were used to analyze the relation of adolescent experiences of violence to: (1) past 6 month street violence involvement and (2) past year intimate partner violence perpetration. Ten percent of the sample reported that they experienced adolescent victimization. Men reporting adolescent victimization were significantly more likely to report past 6-month street violence involvement (Adjusted Odds Ratio (AOR) = 3.2, 95 % CI = 1.7-6.3) and past 6 month intimate partner violence perpetration (AOR = 2.8, 95 % CI = 1.8-5.4) compared to men who did not report such victimization. Study findings suggest that in order to prevent adulthood perpetration of violence, more work is needed to address experiences of victimization among young Black males, particularly violence experienced during adolescence.

  1. Key Challenges and Potential Urban Modelling Opportunities in ...

    African Journals Online (AJOL)

    Urban growth and land use change models, supported by Geographic Information Systems (GIS) software and increased digital data availability, have the ... and opportunities for modelling urban spatial change, with specific reference to the Gauteng City-Region – the heartland of the South African economy and the ...

  2. Procedural City Layout Generation Based on Urban Land Use Models

    NARCIS (Netherlands)

    Groenewegen, S.A.; Smelik, R.M.; Kraker, J.K. de; Bidarra, R.

    2009-01-01

    Training and simulation applications in virtual worlds require significant amounts of urban environments. Procedural generation is an efficient way to create such models. Existing approaches for procedural modelling of cities aim at facilitating the work of urban planners and artists, but either

  3. Psychoactive substances use experience and addiction or risk of addiction among by Polish adolescents living in rural and urban areas

    Directory of Open Access Journals (Sweden)

    Beata Pawłowska

    2014-11-01

    Full Text Available The objective of the study was to determine the similarities and differences between adolescents with psychoactive substances use experience living in urban and rural areas as regards the intensity of Internet addiction symptoms as well as the evaluation of prevalence of psychoactive substances use among adolescents depending on the place of residence. The examined group consisted of 1 860 people (1 320 girls and 540 boys their average age being 17 years. In the study the following research methods were used: the Sociodemographic Questionnaire designed by the authors, the Internet Addiction Questionnaire by Potembska, the Internet Addiction test by Young, the Internet Addiction Questionnaire (KBUI designed by Pawłowska and Potembska. Statistically significant differences were found as regards the prevalence of psychoactive substances use by the adolescents living in urban and rural areas and as regards the intensity of Internet addiction symptoms in adolescents, both from the urban and rural areas, who use and do not use illegal drugs. Significantly more adolescents living in urban areas as compared to their peers living in rural areas use psychoactive substances, mainly marihuana. The adolescents who use psychoactive substances, as compared to the adolescents with no experience using illegal drugs, living both in urban and rural areas significantly more often play online violent games and use web pornography. The adolescents living in rural areas who use psychoactive substances significantly more often as compared to the adolescents who do not use these substances claim that it is only thanks to the interactions established on the Internet that they can get acceptance, understanding and appreciation.

  4. Father-daughter relationships during girls’ adolescence in urban China

    Directory of Open Access Journals (Sweden)

    Qiong Xu

    2009-03-01

    Full Text Available Contextualization Contemporary Chinese families are experiencing tremendous changes, with the adoption of economic reform and the implementation of the one-child-per-family policy. These changes are inevitably leading to changing parent-child relationships in families, especially for girls’ relationships with their parents. The paper is to research girls’ and fathers’ perceptions of father-daughter relationships among two cohorts of girls aged 13/14 and aged 16/17. It will seek to understand, from fathers’ and daughters’ perspectives, fathers’ influences on girls’ lives in the domains of education, work and career aspirations. In addition, how their relationships change across adolescent girls’ lives will also be explored.

  5. Sexual Behavior and Knowledge among Adolescents with Perinatally Acquired Human Immunodeficiency Virus Infection Compared to HIV-Uninfected Adolescents at an Urban Tertiary Center in New Jersey.

    Science.gov (United States)

    Kaushik, Ashlesha; Pineda, Carol; Kest, Helen

    2016-01-01

    Background. Sexual behaviors and knowledge among PHIV-infected (PHIV(+)) adolescents in comparison with HIV-uninfected youths are not well understood and continue to be studied actively. Objective. To compare sexual behavior and sexual knowledge of PHIV(+) and HIV-uninfected adolescents at an urban, tertiary-care center in New Jersey. Study Design. Modified Centers for Disease Control and Prevention (CDC) Youth Risk Behavior Surveillance questionnaire was administered to PHIV(+) and HIV-uninfected adolescents to assess and compare sexual behavior and knowledge over a 1-year-period. Results. Twenty-seven PHIV(+) and 100 HIV-uninfected adolescents were studied; 59% PHIV(+) and 52% HIV-uninfected adolescents were sexually active. A significantly higher proportion of PHIV(+) adolescents compared to HIV-uninfected adolescents reported ≥1 occasion of unprotected penetrative sex (p 4) sexual partners (p = 0.037). Significantly more PHIV(+) males reported receptive anal intercourse (p adolescents in both groups were unaware that sexual abstinence can prevent HIV transmission and >80% adolescents in both groups did not consider multiple sexual partners a risk factor for HIV transmission. Only 25% PHIV(+) adolescents reported disclosing their seropositive status to their first sexual partners. Conclusions. High risk sexual behaviors were significantly more prevalent among PHIV(+) youths; however both groups demonstrated considerable gaps in sexual knowledge. There is an urgent need for heightening awareness about risky behaviors, interventions for prevention, and reproductive health promotion among adolescents.

  6. Perceived health discomfort among adolescent girls and related factors in an urban area, South India.

    Science.gov (United States)

    Omidvar, Shabnam; Bakhtiari, Afsaneh; Firouzbakht, Mojgan; Amiri, Fatemeh Nasiri; Begum, Khyrunnisa

    2017-01-01

    Adolescence is a period of life that is a bridge between childhood and adulthood. India has the world's largest adolescent girl's population, and adolescent girls are an important vulnerable group of population. Perceived health is a predictor of morbidity and mortality in adults and has been an important marker of the health status in population health studies for decades. The aim of the study was to describe adolescent's perception of health and association between some factors such as nutrition status, socioeconomic status (SES), and health status. As their perception of health discomfort affects their health behavior and self-care, therefore, their health status is an important matter to discuss. A cross-sectional study was conducted in urban areas from a major city in South India. Six hundred and fifty adolescent female students aged 10-19 years formed the study population. Standardized self-reporting questionnaires were used to obtain relevant data regarding demographic features, SES, and health status. BMI calculated for each individual. The data were analyzed using SPSS version 16. About 83.3% of participants ranked their health status as good to excellent. A majority of the girls had one or more problems related to their menstrual cycles. The most common occurring problem was headache (45.3%). 47.8% of participants exhibited symptoms of mild insomnia. Strong significant association between nutritional status and SES was found. Higher percentage of undernourished adolescents belonged to low SES. Adolescents are expected to enjoy good health, but this does not seem to be the case in the developing countries like India, where poverty, malnutrition, and repeated infection are rampant. Majority of the problems such as healthy nutrition and self-care can be solved by community-based programs, health education, and food fortification.

  7. Systematic flood modelling to support flood-proof urban design

    Science.gov (United States)

    Bruwier, Martin; Mustafa, Ahmed; Aliaga, Daniel; Archambeau, Pierre; Erpicum, Sébastien; Nishida, Gen; Zhang, Xiaowei; Pirotton, Michel; Teller, Jacques; Dewals, Benjamin

    2017-04-01

    Urban flood risk is influenced by many factors such as hydro-meteorological drivers, existing drainage systems as well as vulnerability of population and assets. The urban fabric itself has also a complex influence on inundation flows. In this research, we performed a systematic analysis on how various characteristics of urban patterns control inundation flow within the urban area and upstream of it. An urban generator tool was used to generate over 2,250 synthetic urban networks of 1 km2. This tool is based on the procedural modelling presented by Parish and Müller (2001) which was adapted to generate a broader variety of urban networks. Nine input parameters were used to control the urban geometry. Three of them define the average length, orientation and curvature of the streets. Two orthogonal major roads, for which the width constitutes the fourth input parameter, work as constraints to generate the urban network. The width of secondary streets is given by the fifth input parameter. Each parcel generated by the street network based on a parcel mean area parameter can be either a park or a building parcel depending on the park ratio parameter. Three setback parameters constraint the exact location of the building whithin a building parcel. For each of synthetic urban network, detailed two-dimensional inundation maps were computed with a hydraulic model. The computational efficiency was enhanced by means of a porosity model. This enables the use of a coarser computational grid , while preserving information on the detailed geometry of the urban network (Sanders et al. 2008). These porosity parameters reflect not only the void fraction, which influences the storage capacity of the urban area, but also the influence of buildings on flow conveyance (dynamic effects). A sensitivity analysis was performed based on the inundation maps to highlight the respective impact of each input parameter characteristizing the urban networks. The findings of the study pinpoint

  8. Application of geo-spatial techniques and cellular automata for modelling urban growth of a heterogeneous urban fringe

    OpenAIRE

    Mahesh Kumar Jat; Mahender Choudhary; Ankita Saxena

    2017-01-01

    Urban growth monitoring and assessment are essential for the sustainable natural resources planning & optimum utilization and reducing the risk of problems arising from unplanned urban growth like pollution, urban heat island and ecological disturbances. Cellular Automata (CA) based modelling techniques have become popular in recent past for simulating the urban growth. Present study is aimed to evaluate the performance of the CA based SLEUTH model in simulating the urban growth of a complex ...

  9. Urban Sprawl Analysis and Modeling in Asmara, Eritrea

    Directory of Open Access Journals (Sweden)

    Mussie G. Tewolde

    2011-09-01

    Full Text Available The extension of urban perimeter markedly cuts available productive land. Hence, studies in urban sprawl analysis and modeling play an important role to ensure sustainable urban development. The urbanization pattern of the Greater Asmara Area (GAA, the capital of Eritrea, was studied. Satellite images and geospatial tools were employed to analyze the spatiotemporal urban landuse changes. Object-Based Image Analysis (OBIA, Landuse Cover Change (LUCC analysis and urban sprawl analysis using Shannon Entropy were carried out. The Land Change Modeler (LCM was used to develop a model of urban growth. The Multi-layer Perceptron Neural Network was employed to model the transition potential maps with an accuracy of 85.9% and these were used as an input for the ‘actual’ urban modeling with Markov chains. Model validation was assessed and a scenario of urban land use change of the GAA up to year 2020 was presented. The result of the study indicated that the built-up area has tripled in size (increased by 4,441 ha between 1989 and 2009. Specially, after year 2000 urban sprawl in GAA caused large scale encroachment on high potential agricultural lands and plantation cover. The scenario for year 2020 shows an increase of the built-up areas by 1,484 ha (25% which may cause further loss. The study indicated that the land allocation system in the GAA overrode the landuse plan, which caused the loss of agricultural land and plantation cover. The recommended policy options might support decision makers to resolve further loss of agricultural land and plantation cover and to achieve sustainable urban development planning in the GAA.

  10. Utilization of maternal healthcare among adolescent mothers in urban India: evidence from DLHS-3

    Science.gov (United States)

    Kumar, Abhishek; Pranjali, Pragya

    2014-01-01

    Background. Low use of maternal healthcare services is one of the reasons why maternal mortality is still considerably high among adolescents mothers in India. To increase the utilization of these services, it is necessary to identify factors that affect service utilization. To our knowledge, no national level study in India has yet examined the issue in the context urban adolescent mothers. The present study is an attempt to fill this gap. Data and Methods. Using information from the third wave of District Level Household Survey (2007–08), we have examined factors associated with the utilization of maternal healthcare services among urban Indian married adolescent women (aged 13–19 years) who have given live/still births during last three years preceding the survey. The three outcome variables included in the analyses are ‘full antenatal care (ANC)’, ‘safe delivery’ and ‘postnatal care within 42 days of delivery’. We have used Chi-square test to determine the difference in proportion and the binary logistic regression to understand the net effect of predictor variables on the utilization of maternity care. Results. About 22.9% of mothers have received full ANC, 65.1% of mothers have had at least one postnatal check-up within 42 days of pregnancy. The proportion of mother having a safe delivery, i.e., assisted by skilled personnel, is about 70.5%. Findings indicate that there is considerable amount of variation in use of maternity care by educational attainment, household wealth, religion, parity and region of residence. Receiving full antenatal care is significantly associated with mother’s education, religion, caste, household wealth, parity, exposure to healthcare messages and region of residence. Mother’s education, full antenatal care, parity, household wealth, religion and region of residence are also statistically significant in case of safe delivery. The use of postnatal care is associated with household wealth, woman’s education, full

  11. Utilization of maternal healthcare among adolescent mothers in urban India: evidence from DLHS-3.

    Science.gov (United States)

    Singh, Aditya; Kumar, Abhishek; Pranjali, Pragya

    2014-01-01

    Background. Low use of maternal healthcare services is one of the reasons why maternal mortality is still considerably high among adolescents mothers in India. To increase the utilization of these services, it is necessary to identify factors that affect service utilization. To our knowledge, no national level study in India has yet examined the issue in the context urban adolescent mothers. The present study is an attempt to fill this gap. Data and Methods. Using information from the third wave of District Level Household Survey (2007-08), we have examined factors associated with the utilization of maternal healthcare services among urban Indian married adolescent women (aged 13-19 years) who have given live/still births during last three years preceding the survey. The three outcome variables included in the analyses are 'full antenatal care (ANC)', 'safe delivery' and 'postnatal care within 42 days of delivery'. We have used Chi-square test to determine the difference in proportion and the binary logistic regression to understand the net effect of predictor variables on the utilization of maternity care. Results. About 22.9% of mothers have received full ANC, 65.1% of mothers have had at least one postnatal check-up within 42 days of pregnancy. The proportion of mother having a safe delivery, i.e., assisted by skilled personnel, is about 70.5%. Findings indicate that there is considerable amount of variation in use of maternity care by educational attainment, household wealth, religion, parity and region of residence. Receiving full antenatal care is significantly associated with mother's education, religion, caste, household wealth, parity, exposure to healthcare messages and region of residence. Mother's education, full antenatal care, parity, household wealth, religion and region of residence are also statistically significant in case of safe delivery. The use of postnatal care is associated with household wealth, woman's education, full antenatal care, safe

  12. Utilization of maternal healthcare among adolescent mothers in urban India: evidence from DLHS-3

    Directory of Open Access Journals (Sweden)

    Aditya Singh

    2014-11-01

    Full Text Available Background. Low use of maternal healthcare services is one of the reasons why maternal mortality is still considerably high among adolescents mothers in India. To increase the utilization of these services, it is necessary to identify factors that affect service utilization. To our knowledge, no national level study in India has yet examined the issue in the context urban adolescent mothers. The present study is an attempt to fill this gap.Data and Methods. Using information from the third wave of District Level Household Survey (2007–08, we have examined factors associated with the utilization of maternal healthcare services among urban Indian married adolescent women (aged 13–19 years who have given live/still births during last three years preceding the survey. The three outcome variables included in the analyses are ‘full antenatal care (ANC’, ‘safe delivery’ and ‘postnatal care within 42 days of delivery’. We have used Chi-square test to determine the difference in proportion and the binary logistic regression to understand the net effect of predictor variables on the utilization of maternity care.Results. About 22.9% of mothers have received full ANC, 65.1% of mothers have had at least one postnatal check-up within 42 days of pregnancy. The proportion of mother having a safe delivery, i.e., assisted by skilled personnel, is about 70.5%. Findings indicate that there is considerable amount of variation in use of maternity care by educational attainment, household wealth, religion, parity and region of residence. Receiving full antenatal care is significantly associated with mother’s education, religion, caste, household wealth, parity, exposure to healthcare messages and region of residence. Mother’s education, full antenatal care, parity, household wealth, religion and region of residence are also statistically significant in case of safe delivery. The use of postnatal care is associated with household wealth, woman

  13. Tobacco outlet density and attitudes towards smoking among urban adolescent smokers.

    Science.gov (United States)

    Mennis, Jeremy; Mason, Michael

    2016-01-01

    This study investigates whether residential exposure to tobacco outlets (i.e., convenience stores and other stores selling tobacco) is associated with attitudes towards smoking among a sample of urban, primarily African American, adolescent smokers. Cross-sectional survey data for 197 adolescents were integrated with spatial data on tobacco outlets via subject home addresses. Ordinal regression was employed to test hypotheses that closer proximity to, and higher concentrations of, tobacco outlets are associated with higher measures of intention to continue to smoke in the future, weaker self-efficacy related to stopping smoking, and more accepting social norms related to smoking, while controlling for characteristics of age, gender, family and peer smoking contexts, and level of nicotine dependence. Moderation by age and gender was also investigated. Higher residential tobacco outlet density is significantly associated with a greater intention to smoke in the next 3 months, a lower readiness to stop smoking, and a greater likelihood of accepting a cigarette from a friend. Residential proximity to a tobacco outlet is significantly associated with a greater intention to smoke 5 years on. Evidence of a relationship between exposure to tobacco outlets and social norms related to smoking was not found, nor was there evidence for moderation of these relationships by age or gender. These results suggest that among urban adolescents who currently smoke, higher residential exposure to tobacco outlets is associated with greater predisposition towards future smoking and lower self-evaluation of the ability to stop smoking.

  14. Rural-Urban Differences in Awareness and Use of Family Planning Services Among Adolescent Women in California.

    Science.gov (United States)

    Yarger, Jennifer; Decker, Martha J; Campa, Mary I; Brindis, Claire D

    2017-04-01

    The purpose of this study was to compare awareness and use of family planning services by rural and urban program site among a sample of adolescent women before participation in the federal Personal Responsibility Education Program in California. We conducted a secondary analysis of survey data collected from youth before participation in California's Personal Responsibility Education Program. Bivariate and multivariate analyses were conducted for a sample of 4,614 females ages 14-18 years to compare awareness and use of family planning services between participants at rural and urban program sites, controlling for the program setting and participant demographic, sexual, and reproductive characteristics. Overall, 61% of participants had heard of a family planning provider in their community, and 24% had visited a family planning provider. Awareness and use of family planning services were lower among rural participants than urban participants. After adjusting for the program setting and participant characteristics, rural participants were less likely to know about a family planning provider in their community (odds ratio, .64; 95% confidence interval, .50-.81) or receive family planning services (odds ratio, .76; 95% confidence interval, .58-.99) than urban participants. Findings suggest that adolescents in rural areas face greater barriers to accessing family planning services than adolescents in urban areas. Targeted efforts to increase awareness and use of family planning services among adolescents in rural areas and among other underserved populations are needed. Copyright © 2016 Society for Adolescent Health and Medicine. Published by Elsevier Inc. All rights reserved.

  15. Prevalence of Overweight and Obesity among Children and Adolescents in Shandong, China: Urban-Rural Disparity.

    Science.gov (United States)

    Zhang, Ying-Xiu; Wang, Zhao-Xia; Zhao, Jin-Shan; Chu, Zun-Hua

    2016-08-01

    The pattern of urban-rural disparity in childhood obesity varies across countries. The present study examined the change trend of urban-rural disparity in childhood overweight and obesity from 1985 to 2014 in Shandong, China. Data for this study were obtained from four cross-sectional surveys of school children carried out in 1985, 1995, 2005 and 2014 in Shandong Province, China. In this study, 39 943 students aged 7-18 years were included (14 458 in 1985, 7198 in 1995, 8568 in 2005 and 9719 in 2014). Height and weight of all subjects were measured; body mass index (BMI) was calculated from their height and weight. The BMI cutoff points recommended by the International Obesity Task Force were used to define overweight and obesity. The prevalence of overweight and obesity was increasing continuously both in urban and rural areas over the past 29 years (1985-2014). The prevalence of combined overweight and obesity was significantly higher in urban than in rural children and adolescents in 1985, 1995 and 2005 (p overweight and obesity was observed in rural areas after 2005; as a result, the urban-rural disparity was getting narrower, and no significant urban-rural disparity was observed in 2014 (p > 0.05). The change trend of urban-rural disparity should be concerned in the future; policies and interventions focused on childhood overweight and obesity should pay attention to rural areas. © The Author [2016]. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  16. Sexual Behavior and Knowledge among Adolescents with Perinatally Acquired Human Immunodeficiency Virus Infection Compared to HIV-Uninfected Adolescents at an Urban Tertiary Center in New Jersey

    OpenAIRE

    Kaushik, Ashlesha; Pineda, Carol; Kest, Helen

    2016-01-01

    Background. Sexual behaviors and knowledge among PHIV-infected (PHIV+) adolescents in comparison with HIV-uninfected youths are not well understood and continue to be studied actively. Objective. To compare sexual behavior and sexual knowledge of PHIV+ and HIV-uninfected adolescents at an urban, tertiary-care center in New Jersey. Study Design. Modified Centers for Disease Control and Prevention (CDC) Youth Risk Behavior Surveillance questionnaire was administered to PHIV+ and HIV-uninfected ...

  17. Sexual Behavior and Knowledge among Adolescents with Perinatally Acquired Human Immunodeficiency Virus Infection Compared to HIV-Uninfected Adolescents at an Urban Tertiary Center in New Jersey

    Directory of Open Access Journals (Sweden)

    Ashlesha Kaushik

    2016-01-01

    Full Text Available Background. Sexual behaviors and knowledge among PHIV-infected (PHIV+ adolescents in comparison with HIV-uninfected youths are not well understood and continue to be studied actively. Objective. To compare sexual behavior and sexual knowledge of PHIV+ and HIV-uninfected adolescents at an urban, tertiary-care center in New Jersey. Study Design. Modified Centers for Disease Control and Prevention (CDC Youth Risk Behavior Surveillance questionnaire was administered to PHIV+ and HIV-uninfected adolescents to assess and compare sexual behavior and knowledge over a 1-year-period. Results. Twenty-seven PHIV+ and 100 HIV-uninfected adolescents were studied; 59% PHIV+ and 52% HIV-uninfected adolescents were sexually active. A significantly higher proportion of PHIV+ adolescents compared to HIV-uninfected adolescents reported ≥1 occasion of unprotected penetrative sex (p4 sexual partners (p=0.037. Significantly more PHIV+ males reported receptive anal intercourse (p80% adolescents in both groups did not consider multiple sexual partners a risk factor for HIV transmission. Only 25% PHIV+ adolescents reported disclosing their seropositive status to their first sexual partners. Conclusions. High risk sexual behaviors were significantly more prevalent among PHIV+ youths; however both groups demonstrated considerable gaps in sexual knowledge. There is an urgent need for heightening awareness about risky behaviors, interventions for prevention, and reproductive health promotion among adolescents.

  18. Using urban forest assessment tools to model bird habitat potential

    Science.gov (United States)

    Lerman, Susannah B.; Nislow, Keith H.; Nowak, David J.; DeStefano, Stephen; King, David I.; Jones-Farrand, D. Todd

    2014-01-01

    The alteration of forest cover and the replacement of native vegetation with buildings, roads, exotic vegetation, and other urban features pose one of the greatest threats to global biodiversity. As more land becomes slated for urban development, identifying effective urban forest wildlife management tools becomes paramount to ensure the urban forest provides habitat to sustain bird and other wildlife populations. The primary goal of this study was to integrate wildlife suitability indices to an existing national urban forest assessment tool, i-Tree. We quantified available habitat characteristics of urban forests for ten northeastern U.S. cities, and summarized bird habitat relationships from the literature in terms of variables that were represented in the i-Tree datasets. With these data, we generated habitat suitability equations for nine bird species representing a range of life history traits and conservation status that predicts the habitat suitability based on i-Tree data. We applied these equations to the urban forest datasets to calculate the overall habitat suitability for each city and the habitat suitability for different types of land-use (e.g., residential, commercial, parkland) for each bird species. The proposed habitat models will help guide wildlife managers, urban planners, and landscape designers who require specific information such as desirable habitat conditions within an urban management project to help improve the suitability of urban forests for birds.

  19. Modelling the impact of Water Sensitive Urban Design technologies on the urban water cycle

    DEFF Research Database (Denmark)

    Locatelli, Luca

    Alternative stormwater management approaches for urban developments, also called Water Sensitive Urban Design (WSUD), are increasingly being adopted with the aims of providing flood control, flow management, water quality improvements and opportunities to harvest stormwater for non-potable uses. ...... runoff and the models presented in this thesis can help by simulating their hydrological impact. Careful engineering design is required to ensure that optimal results are achieved and to avoid unexpected outcomes such as increased groundwater flooding.......Alternative stormwater management approaches for urban developments, also called Water Sensitive Urban Design (WSUD), are increasingly being adopted with the aims of providing flood control, flow management, water quality improvements and opportunities to harvest stormwater for non-potable uses....... WSUD structures (WSUDs) are typically small, decentralized systems for managing stormwater runoff near the source. These systems interact with the urban hydrological cycle, modifying the evapotranspiration, runoff and groundwater recharge fluxes. It is challenging to quantify these hydrological changes...

  20. Modelling and observing urban climate in the Netherlands

    International Nuclear Information System (INIS)

    Van Hove, B.; Steeneveld, G.J.; Heusinkveld, B.; Holtslag, B.; Jacobs, C.; Ter Maat, H.; Elbers, J.; Moors, E.

    2011-06-01

    The main aims of the present study are: (1) to evaluate the performance of two well-known mesoscale NWP (numerical weather prediction) models coupled to a UCM (Urban Canopy Models), and (2) to develop a proper measurement strategy for obtaining meteorological data that can be used in model evaluation studies. We choose the mesoscale models WRF (Weather Research and Forecasting Model) and RAMS (Regional Atmospheric Modeling System), respectively, because the partners in the present project have a large expertise with respect to these models. In addition WRF and RAMS have been successfully used in the meteorology and climate research communities for various purposes, including weather prediction and land-atmosphere interaction research. Recently, state-of-the-art UCM's were embedded within the land surface scheme of the respective models, in order to better represent the exchange of heat, momentum, and water vapour in the urban environment. Key questions addressed here are: What is the general model performance with respect to the urban environment?; How can useful and observational data be obtained that allow sensible validation and further parameterization of the models?; and Can the models be easily modified to simulate the urban climate under Dutch climatic conditions, urban configuration and morphology? Chapter 2 reviews the available Urban Canopy Models; we discuss their theoretical basis, the different representations of the urban environment, the required input and the output. Much of the information was obtained from the Urban Surface Energy Balance: Land Surface Scheme Comparison project (PILPS URBAN, PILPS stands for Project for Inter-comparison of Land-Surface Parameterization Schemes). This project started in March 2008 and was coordinated by the Department of Geography, King's College London. In order to test the performance of our models we participated in this project. Chapter 3 discusses the main results of the first phase of PILPS URBAN. A first

  1. Procedural Content Graphs for Urban Modeling

    Directory of Open Access Journals (Sweden)

    Pedro Brandão Silva

    2015-01-01

    Full Text Available Massive procedural content creation, for example, for virtual urban environments, is a difficult, yet important challenge. While shape grammars are a popular example of effectiveness in architectural modeling, they have clear limitations regarding readability, manageability, and expressive power when addressing a variety of complex structural designs. Moreover, shape grammars aim at geometry specification and do not facilitate integration with other types of content, such as textures or light sources, which could rather accompany the generation process. We present procedural content graphs, a graph-based solution for procedural generation that addresses all these issues in a visual, flexible, and more expressive manner. Besides integrating handling of diverse types of content, this approach introduces collective entity manipulation as lists, seamlessly providing features such as advanced filtering, grouping, merging, ordering, and aggregation, essentially unavailable in shape grammars. Hereby, separated entities can be easily merged or just analyzed together in order to perform a variety of context-based decisions and operations. The advantages of this approach are illustrated via examples of tasks that are either very cumbersome or simply impossible to express with previous grammar approaches.

  2. Distributed models coupling soakaways, urban drainage and groundwater

    DEFF Research Database (Denmark)

    Roldin, Maria Kerstin

    Alternative methods for stormwater management in urban areas, also called Water Sensitive Urban Design (WSUD) methods, have become increasingly important for the mitigation of urban stormwater management problems such as high runoff volumes, combined sewage overflows, poor water quality...... in receiving waters, urban flooding etc. WSUD structures are generally small, decentralized systems intended to manage stormwater near the source. Many of these alternative techniques are based on infiltration which can affect both the urban sewer system and urban groundwater levels if widely implemented...... to manage the bi-directional interaction between stormwater infiltration and groundwater 3. Develops suitable upscaling/downscaling techniques for the integrated soakaway model 4. Assesses the effects of extensive use of soakaways on sewer and groundwater flows in case studies Based on a review...

  3. The Use of Models in Urban Space Pattern Analysis | Berhanu ...

    African Journals Online (AJOL)

    This paper focuses on the use of urban space pattern analysis methods. Physical developments once located in space influence a set of social and economic activities. These days urban developments are of large scale and very fast, often involving complex issues. Models are usually used to reduce complexities in ...

  4. Key Challenges and Potential Urban Modelling Opportunities in ...

    African Journals Online (AJOL)

    Chris Wray

    thus, used to explain and predict land use and transport relationships in urban systems treated earlier as static, but now considered dynamic (Batty, .... People's Republic of China using logistic regression. 3. South Africa Urban Growth Modelling ..... delivery (GDED, 2008; Kekana, 2010). However, after six years and despite ...

  5. Satellite estimates of urban development for hydrological modelling

    DEFF Research Database (Denmark)

    Kaspersen, Per Skougaard; Drews, Martin

    We investigate the applicability of medium resolution Landsat satellite imagery for mapping temporal changes in urban land cover in European cities for direct use in urban flood models. The overarching aim is to provide accurate and costand resource-efficient quantification of temporal changes...

  6. Urbanization Impacts on Mammals across Urban-Forest Edges and a Predictive Model of Edge Effects

    Science.gov (United States)

    Villaseñor, Nélida R.; Driscoll, Don A.; Escobar, Martín A. H.; Gibbons, Philip; Lindenmayer, David B.

    2014-01-01

    With accelerating rates of urbanization worldwide, a better understanding of ecological processes at the wildland-urban interface is critical to conserve biodiversity. We explored the effects of high and low-density housing developments on forest-dwelling mammals. Based on habitat characteristics, we expected a gradual decline in species abundance across forest-urban edges and an increased decline rate in higher contrast edges. We surveyed arboreal mammals in sites of high and low housing density along 600 m transects that spanned urban areas and areas turn on adjacent native forest. We also surveyed forest controls to test whether edge effects extended beyond our edge transects. We fitted models describing richness, total abundance and individual species abundance. Low-density housing developments provided suitable habitat for most arboreal mammals. In contrast, high-density housing developments had lower species richness, total abundance and individual species abundance, but supported the highest abundances of an urban adapter (Trichosurus vulpecula). We did not find the predicted gradual decline in species abundance. Of four species analysed, three exhibited no response to the proximity of urban boundaries, but spilled over into adjacent urban habitat to differing extents. One species (Petaurus australis) had an extended negative response to urban boundaries, suggesting that urban development has impacts beyond 300 m into adjacent forest. Our empirical work demonstrates that high-density housing developments have negative effects on both community and species level responses, except for one urban adapter. We developed a new predictive model of edge effects based on our results and the literature. To predict animal responses across edges, our framework integrates for first time: (1) habitat quality/preference, (2) species response with the proximity to the adjacent habitat, and (3) spillover extent/sensitivity to adjacent habitat boundaries. This framework will

  7. Urbanization impacts on mammals across urban-forest edges and a predictive model of edge effects.

    Science.gov (United States)

    Villaseñor, Nélida R; Driscoll, Don A; Escobar, Martín A H; Gibbons, Philip; Lindenmayer, David B

    2014-01-01

    With accelerating rates of urbanization worldwide, a better understanding of ecological processes at the wildland-urban interface is critical to conserve biodiversity. We explored the effects of high and low-density housing developments on forest-dwelling mammals. Based on habitat characteristics, we expected a gradual decline in species abundance across forest-urban edges and an increased decline rate in higher contrast edges. We surveyed arboreal mammals in sites of high and low housing density along 600 m transects that spanned urban areas and areas turn on adjacent native forest. We also surveyed forest controls to test whether edge effects extended beyond our edge transects. We fitted models describing richness, total abundance and individual species abundance. Low-density housing developments provided suitable habitat for most arboreal mammals. In contrast, high-density housing developments had lower species richness, total abundance and individual species abundance, but supported the highest abundances of an urban adapter (Trichosurus vulpecula). We did not find the predicted gradual decline in species abundance. Of four species analysed, three exhibited no response to the proximity of urban boundaries, but spilled over into adjacent urban habitat to differing extents. One species (Petaurus australis) had an extended negative response to urban boundaries, suggesting that urban development has impacts beyond 300 m into adjacent forest. Our empirical work demonstrates that high-density housing developments have negative effects on both community and species level responses, except for one urban adapter. We developed a new predictive model of edge effects based on our results and the literature. To predict animal responses across edges, our framework integrates for first time: (1) habitat quality/preference, (2) species response with the proximity to the adjacent habitat, and (3) spillover extent/sensitivity to adjacent habitat boundaries. This framework will

  8. Urbanization impacts on mammals across urban-forest edges and a predictive model of edge effects.

    Directory of Open Access Journals (Sweden)

    Nélida R Villaseñor

    Full Text Available With accelerating rates of urbanization worldwide, a better understanding of ecological processes at the wildland-urban interface is critical to conserve biodiversity. We explored the effects of high and low-density housing developments on forest-dwelling mammals. Based on habitat characteristics, we expected a gradual decline in species abundance across forest-urban edges and an increased decline rate in higher contrast edges. We surveyed arboreal mammals in sites of high and low housing density along 600 m transects that spanned urban areas and areas turn on adjacent native forest. We also surveyed forest controls to test whether edge effects extended beyond our edge transects. We fitted models describing richness, total abundance and individual species abundance. Low-density housing developments provided suitable habitat for most arboreal mammals. In contrast, high-density housing developments had lower species richness, total abundance and individual species abundance, but supported the highest abundances of an urban adapter (Trichosurus vulpecula. We did not find the predicted gradual decline in species abundance. Of four species analysed, three exhibited no response to the proximity of urban boundaries, but spilled over into adjacent urban habitat to differing extents. One species (Petaurus australis had an extended negative response to urban boundaries, suggesting that urban development has impacts beyond 300 m into adjacent forest. Our empirical work demonstrates that high-density housing developments have negative effects on both community and species level responses, except for one urban adapter. We developed a new predictive model of edge effects based on our results and the literature. To predict animal responses across edges, our framework integrates for first time: (1 habitat quality/preference, (2 species response with the proximity to the adjacent habitat, and (3 spillover extent/sensitivity to adjacent habitat boundaries. This

  9. Modeling urban films using a dynamic multimedia fugacity model.

    Science.gov (United States)

    Csiszar, Susan A; Diamond, Miriam L; Thibodeaux, Louis J

    2012-05-01

    A thin film coats impervious urban surfaces that can act as a source or sink of organic pollutants to the greater environment. We review recent developments in the understanding of film and film-associated pollutant behavior and incorporate them into an unsteady-state version of the fugacity based Multimedia Urban Model (MUM), focusing on detailed considerations of surface film dynamics. The model is used to explore the conditions under which these atmospherically-derived films act as a temporary source of chemicals to the air and/or storm water. Assuming film growth of 2.1 nm d(-1) (Wu et al., 2008a), PCB congeners 28 and 180 reach air-film equilibrium within hours and days, respectively. The model results suggest that the film acts as a temporary sink of chemicals from air during dry and cool weather, as a source to air in warmer weather, and as a source to storm water and soil during rain events. Using the downtown area of the City of Toronto Canada, as a case study, the model estimates that nearly 1 g d(-1) of ∑(5)PCBs are transferred from air to film to storm water. Copyright © 2012 Elsevier Ltd. All rights reserved.

  10. Modelling Aerosol Dispersion in Urban Street Canyons

    Science.gov (United States)

    Tay, B. K.; Jones, D. P.; Gallagher, M. W.; McFiggans, G. B.; Watkins, A. P.

    2009-04-01

    Flow patterns within an urban street canyon are influenced by various micrometeorological factors. It also represents an environment where pollutants such as aerosols accumulate to high levels due to high volumes of traffic. As adverse health effects are being attributed to exposure to aerosols, an investigation of the dispersion of aerosols within such environments is of growing importance. In particular, one is concerned with the vertical structure of the aerosol concentration, the ventilation characteristics of the street canyon and the influence of aerosol microphysical processes. Due to the inherent heterogeneity of the aerosol concentrations within the street canyon and the lack of spatial resolution of measurement campaigns, these issues are an on-going debate. Therefore, a modelling tool is required to represent aerosol dispersion patterns to provide insights to results of past measurement campaigns. Computational Fluid Dynamics (CFD) models are able to predict detailed airflow patterns within urban geometries. This capability may be further extended to include aerosol dispersion, by an Euler-Euler multiphase approach. To facilitate the investigation, a two-dimensional, multiphase CFD tool coupled with the k-epsilon turbulence model and with the capability of modelling mixed convection flow regimes arising from both wind driven flows and buoyancy effects from heated walls was developed. Assuming wind blowing perpendicularly to the canyon axis and treating aerosols as a passive scalar, an attempt will be made to assess the sensitivities of aerosol vertical structure and ventilation characteristics to the various flow conditions. Numerical studies were performed using an idealized 10m by 10m canyon to represent a regular canyon and 10m by 5m to represent a deep one. An aerosol emission source was assigned on the centerline of the canyon to represent exhaust emissions. The vertical structure of the aerosols would inform future directives regarding the

  11. Patterns, Characteristics, and Correlates of Adolescent Bully-Victims in Urban Tanzania

    Directory of Open Access Journals (Sweden)

    Benjamin A. Kamala

    2013-10-01

    Full Text Available Bullying is an understudied issue of public health importance in low-income countries. In the present study, we aimed to explore social and demographic factors associated with bullying among adolescents in a low-income country urban setting. We divided a sample of 2,154 school-attending adolescents into two groups, those who had been bullied during a 30-day period and those who were not. We considered age, sex, mental health, parent-relationship, hunger and social deprivation and truancy in our comparison of these two groups using logistic regression. Multinomial regression was also used to determine if there was a dose response relationship between bullying frequency and the aforementioned selected variables. We found that school-attending adolescents in Dar es Salaam were more likely to be truant, suffer from mental health problems and have experienced hunger. Adolescents who had parents which were more aware of their free time activities, were less likely to report being bullied. There were also significant differences in bullying frequency and certain variables, most notably with truancy, economic and social deprivation, and signs of depression. School settings in Dar es Salaam offer a potential for intervening in what are potentially harmful effects of bullying behavior among bully victims.

  12. KAP STUDY OF MENSTRUAL PROBLEMS IN ADOLESCENT FEMALES IN AN URBAN AREA OF MEERUT

    Directory of Open Access Journals (Sweden)

    Kalpana Katiyar

    2013-12-01

    Full Text Available Background: Menstruation is an important milestone that results in development of sexual and reproductive capacity of girls. Adolescent girls do not have adequate knowledge about the abnormalities and healthy practices to be followed during menstruation. Objective:To find out the knowledge, attitude, practices regarding menstruation and treatment seeking behaviour for menstrual problems in adolescent females.Material & methods: The present cross sectional study was carried out in an urban field practice area of Department of Community Medicine, LLRM Medical College, Meerut on adolescent girls. A sample of 384 was derived and girls were selected by systematic random sampling technique. Detailed information was collected on a predesigned and pretested questionnaire. Results:38.5% girls were aware of menstruation prior to its onset out of which 66.9% learned from their mother. Only 14.6% of the menstruating girls were aware of at least one menstrual disorder. Dysmenorrhoea was found to be the most frequently occurring problem (58.4%, followed by oligomenorrhoea (16.2%, menorrhagia (13.9%, premenstrual tension (13.6%, infrequent menstruation (12.3% and polymenorrhoea (12.2%. Out of the 226(72.7% girls having menstrual problems 77.9% did not seek any treatment for their problems. 55.2% of the menstruating girls were using sanitary pads during menstruation. Conclusion: The adolescent girls are not well prepared and do not have adequate information regarding menstruation which is an important event of life.

  13. Community violence exposure correlates with smaller gray matter volume and lower IQ in urban adolescents.

    Science.gov (United States)

    Butler, Oisin; Yang, Xiao-Fei; Laube, Corinna; Kühn, Simone; Immordino-Yang, Mary Helen

    2018-02-15

    Adolescents' exposure to community violence is a significant public health issue in urban settings and has been associated with poorer cognitive performance and increased risk for psychiatric illnesses, including PTSD. However, no study to date has investigated the neural correlates of community violence exposure in adolescents. Sixty-five healthy adolescents (age = 14-18 years; 36 females, 29 males) from moderate- to high-crime neighborhoods in Los Angeles reported their violence exposure, parents' education level, and free/reduced school lunch status (socio-economic status, SES), and underwent structural neuroimaging and intelligence testing. Violence exposure negatively correlated with measures of SES, IQ, and gray matter volume. Above and beyond the effect of SES, violence exposure negatively correlated with IQ and with gray matter volume in the left inferior frontal gyrus and anterior cingulate cortex, regions involved in high-level cognitive functions and autonomic modulation, and previously shown to be reduced in PTSD and combat-exposed military populations. The current results provide first evidence that frontal brain regions involved in cognition and affect appear to be selectively affected by exposure to community violence, even in healthy nondelinquent adolescents who are not the direct victims or perpetrators of violence. © 2018 Wiley Periodicals, Inc.

  14. Nutritional status of adolescent girls from an urban slum area in South India.

    Science.gov (United States)

    Prashant, K; Shaw, Chandan

    2009-05-01

    To assess the nutritional status of adolescent girls in a slum community of Urban Health Center, Panangal. A community-based cross-sectional study was carried out over a period of two months. 223 adolescent girls of age 10-18 years were selected randomly. Data was collected by interviewing the adolescent girls using predesigned, pre tested, semi-structured schedule. Parents interview was taken whenever necessary. Anthropometric measurements were recorded using standardized methodology as recommended by World Health Organization (WHO). Standard operational definitions were used. Various statistical applications like percentiles, mean, standard deviation and proportions were used for analysis of the data. Overall prevalence of stunting was found to be 47% and 28.3% as per NCHS and Indian standards respectively. Prevalence of underweight was 42.6% and 22.9% as per NCHS and Indian standards respectively. Prevalence of thinness was 20.6% as per Indian standards. It is concluded that there is a high prevalence of under nutrition among adolescent girls in this slum community. Health education and nutrition interventions are needed on priority basis.

  15. The psychological world of adolescence: a comparative evaluation between rural and urban girls.

    Science.gov (United States)

    Dhoundiyal, Manju; Venkatesh, Renuka

    2009-01-01

    A cross-sectional study was conducted to get an insight into the psychological world of adolescence and to study the influence of locality and school-going activity on it. The study group comprised of 240 girls in the age group 12-18 years equally representing urban and rural areas. Using two psychological tests, namely Strengths and Difficulty Questionnaire and Health-Related Quality of Life Inventory, the results revealed that two-third of them were in the problematic and borderline category as per SDQ and one-third as per PedsQL. Further, there was a definite linear relationship between the total problem score of both scales. This was irrespective of the locale and school-going activity. The results indicate the need for building psychological infrastructure into the social system to help adolescents girls grow to their potential.

  16. The psychological world of adolescence: A comparative evaluation between rural and urban girls

    OpenAIRE

    Dhoundiyal Manju; Venkatesh Renuka

    2009-01-01

    A cross-sectional study was conducted to get an insight into the psychological world of adolescence and to study the influence of locality and school-going activity on it. The study group comprised of 240 girls in the age group 12–18 years equally representing urban and rural areas. Using two psychological tests, namely Strengths and Difficulty Questionnaire and Health-Related Quality of Life Inventory, the results revealed that two-third of them were in the problematic and borderline categor...

  17. Potential sensitivity of warm season precipitation to urbanization extents: Modeling study in Beijing-Tianjin-Hebei urban agglomeration in China

    Science.gov (United States)

    Wang, Jun; Feng, Jinming; Yan, Zhongwei

    2015-09-01

    In this study, we investigated how different degrees of urbanization affect local and regional rainfall using high-resolution simulations based on the Weather Research and Forecasting Model. The extreme rainfall event of 21 July 2012 in Beijing was simulated for three representative urban land use distributions (no urbanization, early urbanization level of 1980, and recent urbanization level of 2009). Results suggest that urban modification of rainfall is potentially sensitive to urban land use condition. Rainfall was increased significantly over the downwind Beijing metropolis because of the effects of early urbanization; however, recent conditions of high urban development caused no significant increase. Further comparative analysis revealed that positive urban thermodynamical effects (i.e., urban warming, increased sensible heat transportation, and enhanced convergence and vertical motions) play major roles in urban modification of rainfall during the early urbanization stage. However, after cities expand to a certain extent (i.e., urban agglomeration), the regional moisture depression induced by the prevalence of impervious urban land has an effect on atmospheric instability energy, which might negate the city's positive impact on regional rainfall. Additional results from regional climate simulations for 10 Julys confirm this supposition. Given the explosive urban population growth and increasing demand for freshwater in cities, the potential negative effects of the urban environment on precipitation are worth investigation, particularly in rapidly developing countries and regions.

  18. [Nutritional evaluation, micronutrient deficiencies and anemia among female adolescents in an urban and a rural zone from Zulia state, Venezuela].

    Science.gov (United States)

    Ortega, Pablo; Leal, Jorymar; Amaya, Daysi; Chávez, Carlos

    2010-03-01

    Female adolescents in reproductive age are a susceptible group to anemia and micronutrient deficiencies. The objective of this study was to know the nutritional, anthropometric and dietetic status, the prevalence of anemia, depletion of iron deposits (FeD) and Vitamin A deficiency (VAD) in female adolescents. Seventy-eight not pregnant female adolescents (15.9 +/- 1.1 years old), from an urban and a periurban zone of Maracaibo, and a rural zone near this city, without infectious and inflammatory processes, were analyzed. Anemia in adolescents was considered when Hb zone showed significant lower values of weight (p = 0.0024), height (p = 0.0027), body mass index BMI (p = 0.0487), fatty area (p = 0.0183), MCV (p = 0.0241), MCH (p = 0.0488), MHCC (p = 0.0228), and the highest prevalence of anemia (66.67%), anemia+FeD (33.33%), and anemia+FeD+RVAD (5.56%), with respect to adolescents from the urban zone. Although, anemic adolescents from the rural zone showed a non significant decrease of the iron percentage adjustment. Iron requirements are increased during adolescence, reaching a maximum at the peak of growth and remaining almost as high in girls after menarche, to replace menstrual losses. The low iron status among adolescents from the rural zone determine that this is a high risk group to anemia and FeD and they require prevention, control and suplementation strategies.

  19. Adolescent psychosocial development: A review of longitudinal models and research.

    Science.gov (United States)

    Meeus, Wim

    2016-12-01

    This review used 4 types of longitudinal models (descriptive models, prediction models, developmental sequence models and longitudinal mediation models) to identify regular patterns of psychosocial development in adolescence. Eight patterns of adolescent development were observed across countries: (1) adolescent maturation in multiple developmental domains; (2) heterogeneous continuity of personal relationships; (3) good goes together with good, and bad with bad, across time in adolescence; (4) parents transmit values and behaviors to their adolescent children over time; (5) adolescent psychopathology leads to erosion of personal relationships with parents and peers; (6) adolescent psychopathology prevents adolescent independence from parents; (7) parental interference in personal issues of adolescents has counterproductive effects over time; (8) mood variability and (social and personal) uncertainty are mechanisms that maintain psychopathology in adolescence. Principles of life span developmental psychology are used to discuss adolescent maturation, and a developmental contextual perspective is used to discuss links between the various developmental patterns. Strengths and limitations of the various longitudinal models, and links between longitudinal and experimental research are discussed. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  20. Modelling spatial patterns of urban growth in Africa

    Science.gov (United States)

    Linard, Catherine; Tatem, Andrew J.; Gilbert, Marius

    2013-01-01

    The population of Africa is predicted to double over the next 40 years, driving exceptionally high urban expansion rates that will induce significant socio-economic, environmental and health changes. In order to prepare for these changes, it is important to better understand urban growth dynamics in Africa and better predict the spatial pattern of rural-urban conversions. Previous work on urban expansion has been carried out at the city level or at the global level with a relatively coarse 5–10 km resolution. The main objective of the present paper was to develop a modelling approach at an intermediate scale in order to identify factors that influence spatial patterns of urban expansion in Africa. Boosted Regression Tree models were developed to predict the spatial pattern of rural-urban conversions in every large African city. Urban change data between circa 1990 and circa 2000 available for 20 large cities across Africa were used as training data. Results showed that the urban land in a 1 km neighbourhood and the accessibility to the city centre were the most influential variables. Results obtained were generally more accurate than results obtained using a distance-based urban expansion model and showed that the spatial pattern of small, compact and fast growing cities were easier to simulate than cities with lower population densities and a lower growth rate. The simulation method developed here will allow the production of spatially detailed urban expansion forecasts for 2020 and 2025 for Africa, data that are increasingly required by global change modellers. PMID:25152552

  1. The backbone of a City Information Model (CIM) : Implementing a spatial data model for urban design

    NARCIS (Netherlands)

    Gil, J.A.; Almeida, J.; Duarte, J.P.

    2011-01-01

    We have been witnessing an increased interest in a more holistic approach to urban design practice and education. In this paper we present a spatial data model for urban design that proposes the combination of urban environment feature classes with design process feature classes. This data model is

  2. Physical fitness and anthropometric characteristics among adolescents living in urban or rural areas of Kosovo

    Directory of Open Access Journals (Sweden)

    Faton Tishukaj

    2017-09-01

    Full Text Available Abstract Background High physical fitness levels in childhood and adolescence are associated with positive health-related outcomes later in life. Albeit many researchers investigated rural-urban differences in physical fitness, the outcomes of these studies are inconsistent and data on Kosovo are widely missing. Thus, this study aims to examine anthropometric and physical fitness parameters in 14 to 15 year old Kosovan adolescents living in rural and urban areas. Methods Two schools from Pristina (mostly urban population and two schools in the surrounding villages of the district of Deçan (mostly rural population were selected. Anthropometric and physical fitness parameters were determined from a total of 354 adolescents (216 urban: 14.5 ± 0.4 years, 138 rural: age 14.5 ± 0.4 years who volunteered to participate in this cross-sectional study performed in 2013/14. Results The prevalence of overweight and obesity was 18.9% in girls and 28.2% in males and excess body fat was detected in 18.2% of the girls and 15.9% of the boys with no differences between rural and urban adolescents. Rural adolescents performed slightly better in relative handgrip strength (+4.7%, p = 0.032 and running speed (10 m: +2.2%, p = 0.012; 20 m: +1.9%, p = 0.035, but no other differences were detected in standing long jump, counter movement jump, cardiorespiratory fitness and sit and reach test. A multinomial logistic regression analysis revealed that being a female was associated with a lower relative risk for overweight (RR = 0.11, 95% CI: 0.03–0.34, p < 0.001 and high body fat content (RR = 0.20, 95% CI: 0.05–0.56, p < 0.001. In addition, higher handgrip strength, longer sprinting time and lower aerobic fitness were associated with a higher relative risk for overweight and excess body fat. In contrast, lower handgrip strength increased the risk for experiencing thinness (RR = 0.92, 95% CI: 0.89–0.96, p < 0.001. Conclusions It could be

  3. Urban compaction or dispersion? An air quality modelling study

    Science.gov (United States)

    Martins, Helena

    2012-07-01

    Urban sprawl is altering the landscape, with current trends pointing to further changes in land use that will, in turn, lead to changes in population, energy consumption, atmospheric emissions and air quality. Urban planners have debated on the most sustainable urban structure, with arguments in favour and against urban compaction and dispersion. However, it is clear that other areas of expertise have to be involved. Urban air quality and human exposure to atmospheric pollutants as indicators of urban sustainability can contribute to the discussion, namely through the study of the relation between urban structure and air quality. This paper addresses the issue by analysing the impacts of alternative urban growth patterns on the air quality of Porto urban region in Portugal, through a 1-year simulation with the MM5-CAMx modelling system. This region has been experiencing one of the highest European rates of urban sprawl, and at the same time presents a poor air quality. As part of the modelling system setup, a sensitivity study was conducted regarding different land use datasets and spatial distribution of emissions. Two urban development scenarios were defined, SPRAWL and COMPACT, together with their new land use and emission datasets; then meteorological and air quality simulations were performed. Results reveal that SPRAWL land use changes resulted in an average temperature increase of 0.4 °C, with local increases reaching as high as 1.5 °C. SPRAWL results also show an aggravation of PM10 annual average values and an increase in the exceedances to the daily limit value. For ozone, differences between scenarios were smaller, with SPRAWL presenting larger concentration differences than COMPACT. Finally, despite the higher concentrations found in SPRAWL, population exposure to the pollutants is higher for COMPACT because more inhabitants are found in areas of highest concentration levels.

  4. Sensitivity of mesoscale model urban boundary layer meteorology to the scale of urban representation

    Directory of Open Access Journals (Sweden)

    D. D. Flagg

    2011-03-01

    Full Text Available Mesoscale modeling of the urban boundary layer requires careful parameterization of the surface due to its heterogeneous morphology. Model estimated meteorological quantities, including the surface energy budget and canopy layer variables, will respond accordingly to the scale of representation. This study examines the sensitivity of the surface energy balance, canopy layer and boundary layer meteorology to the scale of urban surface representation in a real urban area (Detroit-Windsor (USA-Canada during several dry, cloud-free summer periods. The model used is the Weather Research and Forecasting (WRF model with its coupled single-layer urban canopy model. Some model verification is presented using measurements from the Border Air Quality and Meteorology Study (BAQS-Met 2007 field campaign and additional sources. Case studies span from "neighborhood" (10 s ~308 m to very coarse (120 s ~3.7 km resolution. Small changes in scale can affect the classification of the surface, affecting both the local and grid-average meteorology. Results indicate high sensitivity in turbulent latent heat flux from the natural surface and sensible heat flux from the urban canopy. Small scale change is also shown to delay timing of a lake-breeze front passage and can affect the timing of local transition in static stability.

  5. Intersections between polyvictimisation and mental health among adolescents in five urban disadvantaged settings: the role of gender.

    Science.gov (United States)

    Kamndaya, Mphatso; Pisa, Pedro T; Chersich, Matthew F; Decker, Michele R; Olumide, Adesola; Acharya, Rajib; Cheng, Yan; Brahmbhatt, Heena; Delany-Moretlwe, Sinead

    2017-07-04

    Polyvictimisation (PV) - exposure to violence across multiple contexts - causes considerable morbidity and mortality among adolescents. Despite high levels of violence in urban disadvantaged settings, gender differences in associations between PV and mental health have not been well established. We analysed data from a survey with 2393 adolescents aged 15-19 years, recruited using respondent-driven sampling from urban disadvantaged settings in Baltimore (USA), Delhi (India), Ibadan (Nigeria), Johannesburg (South Africa) and Shanghai (China). PV was defined as exposure to two or more types of violence in the past 12 months with family, peers, in the community, or from intimate partners and non-partner sexual violence. Weighted logistic regression models are presented by gender to evaluate whether PV is associated with posttraumatic stress, depression, suicidal thoughts and perceived health status. PV was extremely common overall, but ranged widely, from 74.5% of boys and 82.0% of girls in Johannesburg, to 25.8 and 23.9% respectively in Shanghai. Community violence was the predominant violence type, affecting 72.8-93.7% across the sites. More than half of girls (53.7%) and 45.9% of boys had at least one adverse mental health outcome. Compared to those that did not report violence, boys exposed to PV had 11.4 higher odds of having a negative perception of health (95%CI adjusted OR = 2.45-53.2), whilst this figure was 2.58 times in girls (95%CI = 1.62-4.12). Among girls, PV was associated with suicidal thoughts (adjusted OR = 4.68; 95%CI = 2.29-9.54), posttraumatic stress (aOR = 4.53; 95%CI = 2.44-8.41) and depression (aOR = 2.65; 95%CI = 1.25-5.63). Among boys, an association was only detected between PV and depression (aOR = 1.82; 95%CI = 1.00-3.33). The findings demonstrate that PV is common among both sexes in urban disadvantaged settings across the world, and that it is associated with poor mental health outcomes in girls, and with poor

  6. Intersections between polyvictimisation and mental health among adolescents in five urban disadvantaged settings: the role of gender

    Directory of Open Access Journals (Sweden)

    Mphatso Kamndaya

    2017-07-01

    Full Text Available Abstract Background Polyvictimisation (PV – exposure to violence across multiple contexts – causes considerable morbidity and mortality among adolescents. Despite high levels of violence in urban disadvantaged settings, gender differences in associations between PV and mental health have not been well established. Methods We analysed data from a survey with 2393 adolescents aged 15-19 years, recruited using respondent-driven sampling from urban disadvantaged settings in Baltimore (USA, Delhi (India, Ibadan (Nigeria, Johannesburg (South Africa and Shanghai (China. PV was defined as exposure to two or more types of violence in the past 12 months with family, peers, in the community, or from intimate partners and non-partner sexual violence. Weighted logistic regression models are presented by gender to evaluate whether PV is associated with posttraumatic stress, depression, suicidal thoughts and perceived health status. Results PV was extremely common overall, but ranged widely, from 74.5% of boys and 82.0% of girls in Johannesburg, to 25.8 and 23.9% respectively in Shanghai. Community violence was the predominant violence type, affecting 72.8–93.7% across the sites. More than half of girls (53.7% and 45.9% of boys had at least one adverse mental health outcome. Compared to those that did not report violence, boys exposed to PV had 11.4 higher odds of having a negative perception of health (95%CI adjusted OR = 2.45-53.2, whilst this figure was 2.58 times in girls (95%CI = 1.62-4.12. Among girls, PV was associated with suicidal thoughts (adjusted OR = 4.68; 95%CI = 2.29-9.54, posttraumatic stress (aOR = 4.53; 95%CI = 2.44-8.41 and depression (aOR = 2.65; 95%CI = 1.25-5.63. Among boys, an association was only detected between PV and depression (aOR = 1.82; 95%CI = 1.00-3.33. Conclusion The findings demonstrate that PV is common among both sexes in urban disadvantaged settings across the world, and that it is associated

  7. Modeling Methodologies for Representing Urban Cultural Geographies in Stability Operations

    National Research Council Canada - National Science Library

    Ferris, Todd P

    2008-01-01

    ... 2.0.0, in an effort to provide modeling methodologies for a single simulation tool capable of exploring the complex world of urban cultural geographies undergoing Stability Operations in an irregular warfare (IW) environment...

  8. Socio-economic status as an environmental factor – incidence of underweight, overweight and obesity in adolescents from less-urbanized regions of Poland

    Directory of Open Access Journals (Sweden)

    Anna Długosz

    2015-09-01

    Underweight incidence in adolescents from less urbanized regions of Poland depended on socio-economic status. An adolescent with average socio-economic status was 3 times less likely to be underweight than an adolescent with low socio-economic status. The correlation between socio-economic status and overweight and obesity was not significant.

  9. Assessment of an Integrated Nutrition Communication Approach to Educate the School-Going Adolescent Girls Living in Urban Slums of Hyderabad, Telangana State, India

    Science.gov (United States)

    Rao, D. Raghunatha; Vijayapushpam, T.; Rao, N. Amulya; Dube, Anilkumar; Venkaiah, K.

    2016-01-01

    Purpose: Consumption of right diet during the adolescent phase is a critical issue among the adolescent population as their eating behavior is significantly influenced by the peers. Therefore, a study was carried out to educate the school-going adolescent girls living in urban slums of Hyderabad, Telangana, India on right nutrition. Methods: The…

  10. Models of household location and urban amenities

    DEFF Research Database (Denmark)

    van Duijn, Mark; Möhlmann, Jan; Mulalic, Ismir

    the drivers of economic prosperity and growth in cities. In this introductory section we discuss some evidence that motivates this idea. In ‘The Economy of Cities’ Jane Jacobs (1970) puts forward the thesis that human interaction is a crucial aspect of urban economies. Economists such as Lucas (1988) picked...... as a kind of agglomeration economies. Cities thus become more productive places and this process works continuously and generates growth. Empirical evidence in favor of this hypothesis was provided by Rauch (1993) who estimated that an additional year of schooling of the labor force in an urban area gave...

  11. Modelling of the urban wind profile

    DEFF Research Database (Denmark)

    Gryning, Sven-Erik; Batchvarova, Ekaterina

    2008-01-01

    Analysis of meteorological measurements from tall masts in rural and urban areas show that the height of the boundary layer influences the wind profile even in the lowest hundreds of meters. A parameterization of the wind profile for the entire boundary layer is formulated with emphasis...... on the lowest 200-300 m and presented here. Results are shown from applying the parameterization of the wind profile on independent measurements from an urban experimental campaign that was carried out in Sofia, Bulgaria in 2003....

  12. Residential mobility, socioeconomic context and body mass index in a cohort of urban South African adolescents

    Science.gov (United States)

    Ginsburg, Carren; Griffiths, Paula L.; Richter, Linda M.; Norris, Shane A.

    2013-01-01

    Adolescents who are changing residence, as well as their social and economic circumstances may experience lifestyle changes that have an effect on body composition outcomes such as undernutrition, overweight or obesity. This paper uses data from Birth to Twenty, a birth cohort of South African urban children, to determine the relationship between residential mobility and body mass index (BMI) amongst Black adolescents aged 15 (n=1613), and to examine the role of changes in household socioeconomic status (SES). The prevalence of overweight and obesity in the sample was 25% in females and 8% in males. Amongst the females, a strong positive association between residential mobility and BMI was observed for those who also experienced an increase in household SES between birth and 15 years (β=0.42, SE=0.13), while no effect was identified for males. The study shows the potential for environmental change and increased resources to influence the risk for obesity. It also highlights the value in considering the range of social environmental factors and changes across the early life course that might play a part in evolving nutritional patterns in urban transitioning environments. PMID:23211581

  13. Longitudinal outcomes of an alcohol abuse prevention program for urban adolescents.

    Science.gov (United States)

    Schinke, Steven P; Schwinn, Traci M; Fang, Lin

    2010-05-01

    This randomized clinical trial examined longitudinal outcomes from an alcohol abuse prevention program aimed at urban youths. Study participants were an ethnically and racially heterogeneous sample of early adolescents, recruited from community-based agencies in greater New York City and its environs. Once they assented to study participation and gained parental permission, youths were divided into three arms: youth intervention delivered by CD-ROM (CD), the same youth intervention plus parent intervention (CD(P)), and control. Once all youths completed baseline measures, those in CD and CD(P) arms received a computerized 10-session alcohol abuse prevention program. Parents of youths in the CD(P) arm received supplemental materials to support and strengthen their children's learning. All youths completed postintervention and annual follow-up measures, and CD- and CD(P)-arm participants received annual booster intervention sessions. Seven years following postintervention testing and relative to control-arm youths, youths in CD and CD(P) arms reported less alcohol use, cigarette use, binge drinking, and peer pressure to drink; fewer drinking friends; greater refusal of alcohol use opportunities; and lower intentions to drink. No differences were observed between CD and CD(P) arms. Study findings lend support to the potential of computerized, skills-based prevention programs to help urban youth reduce their risks for underage drinking. Copyright 2010 Society for Adolescent Medicine. Published by Elsevier Inc. All rights reserved.

  14. Multi-scale atmospheric environment modelling for urban areas

    Directory of Open Access Journals (Sweden)

    A. A. Baklanov

    2009-04-01

    Full Text Available Modern supercomputers allow realising multi-scale systems for assessment and forecasting of urban meteorology, air pollution and emergency preparedness and considering nesting with obstacle-resolved models. A multi-scale modelling system with downscaling from regional to city-scale with the Environment – HIgh Resolution Limited Area Model (Enviro-HIRLAM and to micro-scale with the obstacle-resolved Micro-scale Model for Urban Environment (M2UE is suggested and demonstrated. The M2UE validation results versus the Mock Urban Setting Trial (MUST experiment indicate satisfactory quality of the model. Necessary conditions for the choice of nested models, building descriptions, areas and resolutions of nested models are analysed. Two-way nesting (up- and down-scaling, when scale effects both directions (from the meso-scale on the micro-scale and from the micro-scale on the meso-scale, is also discussed.

  15. Biosocial models of adolescent problem behaviors.

    Science.gov (United States)

    Udry, J R

    1990-01-01

    This paper develops a biosocial model of adolescent age-graded norm violations ("problem behaviors"), combining a traditional social control model with a biological model using steroid hormones. Subjects were 101 white boys drawn from the 8th-, 9th-, and 10th-grade rosters of selected public schools, and ranging in age from 13 to 16. Subjects completed self-administered questionnaires and provided blood samples which were assayed for the behaviorally relevant hormones. Boys' problem behavior shows strong hormone effects. Social and biological variables have both additive and indirect effects. Using a biosocial model leads to conclusions which are different from those which would have been drawn from the sociological model alone.

  16. Designing and implementing a regional urban modeling system using the SLEUTH cellular urban model

    Science.gov (United States)

    Jantz, Claire A.; Goetz, Scott J.; Donato, David I.; Claggett, Peter

    2010-01-01

    This paper presents a fine-scale (30 meter resolution) regional land cover modeling system, based on the SLEUTH cellular automata model, that was developed for a 257000 km2 area comprising the Chesapeake Bay drainage basin in the eastern United States. As part of this effort, we developed a new version of the SLEUTH model (SLEUTH-3r), which introduces new functionality and fit metrics that substantially increase the performance and applicability of the model. In addition, we developed methods that expand the capability of SLEUTH to incorporate economic, cultural and policy information, opening up new avenues for the integration of SLEUTH with other land-change models. SLEUTH-3r is also more computationally efficient (by a factor of 5) and uses less memory (reduced 65%) than the original software. With the new version of SLEUTH, we were able to achieve high accuracies at both the aggregate level of 15 sub-regional modeling units and at finer scales. We present forecasts to 2030 of urban development under a current trends scenario across the entire Chesapeake Bay drainage basin, and three alternative scenarios for a sub-region within the Chesapeake Bay watershed to illustrate the new ability of SLEUTH-3r to generate forecasts across a broad range of conditions.

  17. Urban-rural disparities in the nutritional status of school adolescent girls in the Mizan district, south-western Ethiopia.

    Science.gov (United States)

    Berheto, Tezera M; Mikitie, Wondafrash K; Argaw, Alemayehu

    2015-01-01

    Malnutrition that occurs during adolescence has important consequences for the future growth and development of the individual, particularly in girls in developing countries. Besides limiting growth, adolescent malnutrition has important consequences for society. Despite this, there is a lack of information on the nutritional status of adolescent girls in Ethiopia. This study was therefore performed to help redress this lack of data and to provide information for future improvements by health planners and policy makers. A comparative cross-sectional study design was employed to determine the urban-rural disparity in nutritional status of adolescent school girls in the Mizan district in south-western Ethiopia. A two-stage sampling procedure was used to randomly select 622 adolescent girls, 311 each from urban and rural locations. Trained field workers used structured questionnaires to obtain the desired information from the respondents. Anthropometric measurements of height and weight were collected using standard procedures and appropriate quality control measures. Height-for-age Z-scores and body mass index (BMI)-for-age Z-scores were generated using AnthroPlus software. The independent sample t-test and χ2 test were used to determine statistical significance. There were no significant differences in the ages or physical activities of the two populations of girls studied. Consumption of cereal, vegetables, sweets, sugars, fats, meat, and eggs was similar between the two groups, although slight differences were found with regard to legumes, milk, and fruit consumption. No significant differences were found in the prevalence of mild underweight girls and overweight girls in the urban and rural groups (26.5% vs 22.3% and 7.5% vs 5.2%, respectively). Significant stunting was, however, present in the rural population (40.9% vs. 17.8% in the urban group). Although overall lower than the reference data provided by WHO, the mean BMI-for-age Z-scores and height-for-age Z

  18. Influence of urbanization level and Gross Domestic Product on the prevalence of adolescent obesity in Poland.

    Science.gov (United States)

    Zienkiewicz, Ewa; Okoński, Marek; Matuszewski, Lukasz; Zienkiewicz, Tadeusz; Goździewska, Małgorzata; Klatka, Maria

    2014-01-01

    Obesity is considered as a major disease of twenty-first century civilization. Its occurrence in Poland and worldwide has been increasing steadily for many years. Several factors play an important role in the development of overweight and obesity. In addition to the genetic factors and those associated with diseases of the endocrine system and nervous system, the rapidly growing number of obese people is due to improper nutrition. In this paper, authors attempt to justify the prevalence of obesity in Poland among the population of adolescent and young adults aged 15 - 29 years of age, depending on the urbanization level and Gross Domestic Product (GDP) per capita of voivodeships. Voivodeships, as an entity of regional autonomy, were divided into two groups according to urbanization level and GDP per capita. From the total population of each voivodeship population, groups of overweight and obese people aged 15-29 were selected. The population group aged 15-29 was divided into male and female subgroups. Each subgroup was compared in the different voivodeships, depending on the urbanization level and GDP per capita. The study shows that there is a strong linear relationship between the prevalence of obesity and GDP per capita of each examined region. During the study, the correlation between the level of prevalence of obesity and urbanization level produced a negative result. The high level of regional economic development in the economic transformation states has a significant impact on the increase in the percentage of people with overweight and obesity in the population aged 15-29. Gender and place of residence (urban or rural areas) did not show significant correlation with the occurrence of overweight and obesity in the study group of the population.

  19. Influence of urbanization level and Gross Domestic Product on the prevalence of adolescent obesity in Poland

    Directory of Open Access Journals (Sweden)

    Ewa Zienkiewicz

    2014-03-01

    Full Text Available Introduction. Obesity is considered as a major disease of twenty-first century civilization. Its occurrence in Poland and worldwide has been increasing steadily for many years. Several factors play an important role in the development of overweight and obesity. In addition to the genetic factors and those associated with diseases of the endocrine system and nervous system, the rapidly growing number of obese people is due to improper nutrition. Objectives. In this paper, authors attempt to justify the prevalence of obesity in Poland among the population of adolescent and young adults aged 15 – 29 years of age, depending on the urbanization level and Gross Domestic Product (GDP per capita of voivodeships. Methods. Voivodeships, as an entity of regional autonomy, were divided into two groups according to urbanization level and GDP per capita. From the total population of each voivodeship population, groups of overweight and obese people aged 15–29 were selected. The population group aged 15–29 was divided into male and female subgroups. Each subgroup was compared in the different voivodeships, depending on the urbanization level and GDP per capita. Results. The study shows that there is a strong linear relationship between the prevalence of obesity and GDP per capita of each examined region. During the study, the correlation between the level of prevalence of obesity and urbanization level produced a negative result. Conclusion. The high level of regional economic development in the economic transformation states has a significant impact on the increase in the percentage of people with overweight and obesity in the population aged 15–29. Gender and place of residence (urban or rural areas did not show significant correlation with the occurrence of overweight and obesity in the study group of the population.

  20. Integration of LUTI models into sustainable urban mobility plans (SUMPs

    Directory of Open Access Journals (Sweden)

    Nikolaos Gavanas

    2016-06-01

    Full Text Available A literature review indicates that there is an increasing number of Land Use/Transport Interaction (LUTI models being used in policy analysis and support of urban land use, transport and environmental planning. In this context, LUTI models are considered to be useful for the development of scenarios during the preparatory stage of Sustainable Urban Mobility Plans (SUMPs. A SUMP can be defined as a strategic planning framework, proposed by the European Commission, for planning and design of an urban multimodal transport system, which combines multi-disciplinary policy analysis and decision making. The objective of a SUMP is to achieve sustainable urban mobility, i.e. accessibility for all, safety and security, reduction in emissions and energy consumption, efficient and cost-effective transport and an improvement in the urban environment. Based on the overall conceptual and methodological framework of LUTI models (Geurs and van Wee 2004, the scope of the proposed research is to fully integrate a LUTI model into a contemporary transport planning framework and, more specifically, into the SUMP structure. This paper focuses on the configuration of the integration pattern, according to which a LUTI model may evolve and interact with the planning process throughout the eleven elements of the SUMP, as well as the evaluation of the benefits and drawbacks from the implementation of the proposed pattern for the enhancement of SUMP and overall promotion of sustainable urban planning.

  1. A study of insulin resistance by HOMA-IR and its cut-off value to identify metabolic syndrome in urban Indian adolescents.

    Science.gov (United States)

    Singh, Yashpal; Garg, M K; Tandon, Nikhil; Marwaha, Raman Kumar

    2013-01-01

    Insulin resistance (IR) and associated metabolic abnormalities are increasingly being reported in the adolescent population. Cut-off value of homeostasis model of assessment IR (HOMA-IR) as an indicator of metabolic syndrome (MS) in adolescents has not been established. This study aimed to investigate IR by HOMA-IR in urban Indian adolescents and to establish cut-off values of HOMA-IR for defining MS. A total of 691 apparently healthy adolescents (295 with normal body mass index (BMI), 205 overweight, and 199 obese) were included in this cross-sectional study. MS in adolescents was defined by International Diabetes Federation (IDF) and Adult Treatment Panel III (ATP III) criteria. IR was calculated using the HOMA model. Mean height, waist circumference (WC), waist/hip ratio (WHR), waist/height ratio (WHtR), and blood pressure were significantly higher in boys as compared to girls. The HOMA-IR values increased progressively from normal weight to obese adolescents in both sexes. Mean HOMA-IR values increased progressively according to sexual maturity rating in both sexes. HOMA-IR value of 2.5 had a sensitivity of >70% and specificity of >60% for MS. This cut-off identified larger number of adolescents with MS in different BMI categories (19.7% in normal weight, 51.7% in overweight, and 77.0% in obese subjects) as compared to the use of IDF or ATP III criteria for diagnosing MS. Odds ratio for having IR (HOMA-IR of >2.5) was highest with WHtR (4.9, p pHOMA-IR increased with sexual maturity and with progression from normal to obese. A HOMA-IR cut-off of 2.5 provided the maximum sensitivity and specificity in diagnosing MS in both genders as per ATP III and IDF criteria.

  2. Exposure to drug trafficking among urban, low-income African American children and adolescents.

    Science.gov (United States)

    Li, X; Stanton, B; Feigelman, S

    1999-02-01

    To examine the association between exposure to drug trafficking (selling or delivering drugs) and exposure to other forms of community violence and risk behaviors among urban, low-income African American children and adolescents. Community-based, cross-sectional survey. Ten public housing developments in a large eastern city in the United States. Three hundred forty-nine urban, low-income African American children and adolescents (198 boys and 151 girls), aged 9 to 15 years. Exposure to drug trafficking and other forms of community violence (as either a victim or a witness), risk behaviors/perceptions including risk-taking/delinquency, drug use, perpetration of violence or other crimes, threats to school achievement, and perceived peer involvement. Exploratory factor analysis was performed to examine whether exposure to drug trafficking is a risk factor that is distinct from other exposure to violence. Multivariate analysis of variance and chi2 tests were performed to assess the relationship between exposure to drug trafficking and other forms of community violence and risk behaviors/perceptions. Of 349 participants, 63 (18%) had been asked to traffic drugs and 134 (38%) had seen someone else being asked to traffic drugs. Factor analysis indicates that exposure to drug trafficking appears to be different from other forms of community violence. However, having been asked and having seen other people being asked to traffic drugs were both strongly associated with exposure to other forms of community violence. Compared with children and adolescents who had not been exposed to drug trafficking, those who were exposed to drug trafficking reported more risk-taking and delinquent behaviors, drug use, threats to achievement, and a perception of more peer involvement in these risk behaviors. Exposure to drug trafficking is a unique risk factor that is strongly associated with exposure to other forms of community violence and involvement in other risk behaviors.

  3. Dietary intake, physical activities and nutritional status of adolescent girls in an urban population of Bangladesh

    Directory of Open Access Journals (Sweden)

    Ali Abbas Mohammad Kurshed

    2010-07-01

    Full Text Available In Bangladesh, under-nutrition is a common health problem, but for socio-cultural background, it is most predominant among the female population starting from their early life to motherhood. For the adolescent girls, there has been no such study though they will be the future mothers. Therefore, this study is designed to address the lifestyle and nutrition of the Bangladeshi female adolescents. The study was conducted purposively in Dhaka selecting randomly 15 of 95 City corporation wards of Dhaka City. All adolescent girls aged 10–18 years were considered eligible participants of an urban population of Bangladesh. The study included socio-demographic information, clinical examination, dietary intake, physical activities and body mass index (BMI = weight in kg / height in m. sq.. Overall, 352 adolescent girls volunteered. Socio-economically, 51% of them had monthly family income ³ 20,000 BDT and 11.4% had <10,000 BDT. Of the participants, 14.8% had BMI <18.5, 80.7% had 18.5 – 24.9, and 4.6% had ³ 25. BMI was found not to have significant association with physical activities. No clinical signs of vitamin A deficiency were observed. On clinical examination 75% of the participants were found healthy, 15.9% had anemia and 5.7% had diarrhea. Compared with the national dietary intake, the cereal intake was lower but protein containing foods like pulse and nuts, meat, egg, fish, milk and milk products were found very much close to the national intake. On the average, 95 % of calorie, 93.5 % of protein and 96.5 % of fat requirement were met. For micronutrient requirement, very low intake was observed with calcium (62 % and iron (63 %. In conclusion, the participants consumed rice daily with frequent consumption of vegetables. Although the study subjects were mostly from higher class of urban dwellers their dietary intake was found not healthy as evidenced by daily rice intake and very low intake of fruits, calcium and iron indicating lack of

  4. A STUDY OF HEALTH RISK BEHAVIOUR AMONGST 14-19 YEAR ADOLESCENT STUDENTS IN URBAN AREAS OF DISTRICT JHANSI

    Directory of Open Access Journals (Sweden)

    Peeyush Kariwal

    2010-06-01

    Full Text Available Objectives: To study the prevalence of health risk behaviours amongst 14-19 year adolescent students in urban areas of District Jhansi (Uttar Pradesh. Study design: Cross-sectional study. Units of study and Study area: 14-I9year old adolescent students studying in various Colleges ofJhansi. Sampling technique: Two stage cluster sampling. Participants :366 students [263 (71.86% male and I 03 (28.14% female]. Results: Main risk behaviour amongstudents found to be cigarette/bidi smoking, drinking alcohol and tobacco use. 15.30% students tried cigarette/bidi smoking at least once in lifetime while 5.46% smokers tried smoking at age less than 14 years. 0.82% students were found doing heavy smoking. Among smokers 21.03% never fried to quit smoking in past 6 months. All these behaviours were more common among male than in female. Out of all students, 19.95% had ever drink alcohol and 4.64% had theirfirst drink of alcohol at age less than14 years. Drinking habits were also more common among male than in female. Favourite celebrity were the most common role models seen smoking (38.79% and drinking (16. 94% followed by father smoking (24.60% and drinking (14.48%.

  5. Family Factors and Adolescent Problem Drinking in a High-Risk Urban Peruvian Neighborhood.

    Science.gov (United States)

    Pizarro, Katherine Wingert; Bustamante, Inés V; Surkan, Pamela J

    2017-01-28

    Family relationships are widely recognized as playing a role in adolescent alcohol use. Although family relationships and parenting vary by culture, limited research has explored these relationships in Latin America. We sought to determine which family factors are associated with adolescent alcohol use in Callao, Peru. Data come from a cross-sectional survey conducted in a public secondary school in Callao, Peru in 2007. A total of 180 11th grade students are included in the analysis. Our main outcome measure was problem drinking, defined as self-report of having ever consumed beer, wine, spirits, or hard alcohol to a point of drunkenness. Logistic regression was used to determine if odds of problem drinking varied by level of parental monitoring (knowledge of activities and whereabouts), positive family relationships, or family conflict, while controlling for demographic and peer variables. Low levels of parental monitoring and low levels of positive family relationships were each associated with significantly higher odds of lifetime problem drinking in analyses adjusted for deviant peer affiliation along with sociodemographic variables (odds ratio (OR) = 4.2; 95% confidence interval (CI): 1.3-13.5; OR = 4.4; 95% CI: 1.5-13.0, respectively). Although family conflict was associated with elevated odds of lifetime problem drinking, this did not reach significance (adjusted OR = 2.01; 95% CI: 0.8-5.1). Conclusions/Importance: Interventions designed to prevent adolescent alcohol use in urban Peru may benefit from promoting positive family interactions and parental monitoring skills.

  6. Drug trafficking and drug use among urban African-American adolescents: a causal analysis.

    Science.gov (United States)

    Li, X; Feigelman, S; Stanton, B; Galbraith, J; Huang, W

    1998-11-01

    To test the hypothesis that involvement in drug trafficking leads to illicit drug use among urban African-American adolescents. Self-reports of substance use, illicit drug use, and drug trafficking were obtained at baseline and every 6 months for 24 months from 383 African-American early adolescents. Transitions between involvement in drug trafficking and illicit drug use over time were examined. Path analysis was conducted to examine the causal relation between drug trafficking and drug use. Among the 35 youth who were initially involved only in drug trafficking, 22 (67%) subsequently used illicit drugs. Of the 53 youth who were initially involved only in illicit drug use, only 19 (42%) continued using drugs at later waves (p drug trafficking had a strong effect on subsequent drug trafficking and drug use, whereas baseline drug use did not have an effect on subsequent drug use or drug trafficking. Initiation of drug trafficking by adolescents appears to lead to sustained involvement in drug-related activities, including continued drug trafficking and drug use. By contrast, initiation of drug use does not necessarily lead to continued involvement in drug-related behaviors.

  7. Perceptions and experiences of adolescents, parents and school administrators regarding adolescent-parent communication on sexual and reproductive health issues in urban and rural Uganda.

    Science.gov (United States)

    Muhwezi, Wilson Winstons; Katahoire, Anne Ruhweza; Banura, Cecily; Mugooda, Herbert; Kwesiga, Doris; Bastien, Sheri; Klepp, Knut-Inge

    2015-11-30

    Evidence suggests that in spite of some adolescents being sexually active, many parents do not discuss sex-related issues with them due to lack of age-appropriate respectful vocabulary and skills. The likelihood of parent-adolescent communication improving sexual and reproductive health outcomes appears plausible. The desire to understand parent-adolescent communication and how to improve it for promotion of healthy sexual behaviours inspired this research. The paper is meant to describe perceptions of adolescents, parents and school administrators about parent-adolescent communication on sexual issues; describe the content of such communication and identify factors that influence this communication. The study was done among two urban and two rural secondary school students in their second year of education. Data were collected from 11 focus group discussions and 10 key Informants Interviews. Data management, analysis and interpretation followed thematic analysis principles. Illuminating verbatim quotations are used to illustrate findings. Parental warmth and acceptability of children was perceived by parents to be foundational for a healthy adolescent- parent communication. Perceptions of adolescents tended to point to more open and frequent communication with mothers than fathers and to cordial relationships with mothers. Fathers were perceived by adolescents to be strict, intimidating, unapproachable and unavailable. While adolescents tended to generally discuss sexual issues with mothers, male adolescents communicated less with anyone on sex, relationships and condoms. Much of the parent-adolescent communication was perceived to focus on sexually transmitted infections and body changes. Discussions of sex and dating with adolescents were perceived to be rare. Common triggers of sexuality discussions with female adolescents were; onset of menstruation and perceived abortion in the neighbourhood. Discussion with male adolescents, if it occurred was perceived to

  8. Human rights and reproductive health: political realities and pragmatic choices for married adolescent women living in urban slums, Bangladesh.

    Science.gov (United States)

    Rashid, Sabina Faiz

    2011-12-16

    In Bangladesh, particularly in urban slums, married adolescent women's human rights to life, health, and reproductive and sexual health remain adversely affected because of the structural inequalities and political economic, social and cultural conditions which shape how rights are understood, negotiated and lived. The focus of the research and methods was anthropological. An initial survey of 153 married adolescent women was carried out and from this group, 50 in-depth interviews were conducted with selected participants and, from the in-depth interviews, a further eight case studies of women and their families were selected for in-depth repeated interviews and case histories. This paper speaks of the unanticipated complexities when writing on reproductive rights for poor adolescent women living in the slums, where the discourses on 'universal human rights' are often removed from the reality of adolescent women's everyday lives. Married adolescent women and their families remain extremely vulnerable in the unpredictable, crime-prone and insecure urban slum landscape because of their age, gender and poverty. Adolescent women's understanding of their rights such as the decision to marry early, have children, terminate pregnancies and engage in risky sexual behaviour, are different from the widely accepted discourse on rights globally, which assumes a particular kind of individual thinking and discourse on rights and a certain autonomy women have over their bodies and their lives. This does not necessarily exist in urban slum populations. The lived experiences and decisions made pertaining to sexual and reproductive health and 'rights' exercised by married adolescent women, their families and slum communities, allow us to reflect on the disconnect between the international legal human rights frameworks as applied to sexual and reproductive health rights, and how these are played out on the ground. These notions are far more complex in environments where married

  9. Creating a geospatial database of risks and resources to explore urban adolescent substance use.

    Science.gov (United States)

    Mason, Michael; Cheung, Ivan; Walker, Leslie

    2009-01-01

    This article illustrates the methodology of creating a comprehensive geospatial database in order to systematically understand the social ecology of risk and protection for urban youth. The challenges and future opportunities involved with this complex work were reviewed, and specific examples were provided to guide researchers. Data were collected from a Washington, DC adolescent substance abuse treatment sample to construct a geospatial database to evaluate urban youths' social environmental risk and resources. A geographic information systems (GIS) approach was adopted to integrate a large array of variables at different levels of geography. For example, risk factors included proximity to crime hotspots, and other known potential establishments with negative influence (such as liquor stores). We also used GIS to assess the subjects' accessibility to protective resources such as public libraries, recreational, parks, and police stations. Unique to our method was the collecting and mapping of each teen's activity locations (places they typically frequent). These data form "risk and protection exposure" estimates for each teen. Finally, we illustrated the specific methods for creating a dynamic geospatial database for urban youth and present future analytical approaches and challenges with these type of data.

  10. Relational aggression and adverse psychosocial and physical health symptoms among urban adolescents.

    Science.gov (United States)

    Williams, Jessica Roberts; Fredland, Nina; Han, Hae-Ra; Campbell, Jacquelyn C; Kub, Joan E

    2009-01-01

    The purpose of this study was to examine relational aggression and its relationship with adverse psychosocial and physical health symptoms among urban, African American youth. Quantitative, cross-sectional survey design. The sample consisted of 185 predominantly African American (95.1%) seventh-grade students (mean age: 13.0; female: 58%) attending 4 urban middle schools. The Children's Social Behavior Scale and Social Experience Questionnaire were used to measure relational aggression and relational victimization. The Pediatric Symptom Checklist was used to assess psychosocial difficulties, including internalizing behaviors, externalizing behaviors, and attention problems. Physical health symptoms were measured with questions about colds/flu, headaches, and stomach aches. 2-way multivariate analysis of variance revealed significant differences in externalizing behavior, with perpetrators reporting higher levels than nonperpetrators. Victims reported more internalizing behavior than nonvictims; however, this was only significant for males. For females, significant negative effects on health outcomes were found, resulting from the interaction of perpetration and victimization. Findings suggest that relational aggression is a common occurrence among urban, minority adolescents and may result in adverse health outcomes. These results provide several avenues for future research and implications for healthcare practice. Intervention strategies are needed to prevent relational aggression and continual or subsequent adverse health symptoms.

  11. Socio-economic status and urbanization are linked to snacks and obesity in adolescents in Botswana.

    Science.gov (United States)

    Maruapula, Segametsi D; Jackson, Jose C; Holsten, Joanna; Shaibu, Sheila; Malete, Leapetswe; Wrotniak, Brian; Ratcliffe, Sarah J; Mokone, George G; Stettler, Nicolas; Compher, Charlene

    2011-12-01

    To describe patterns of food consumption associated with overweight/obesity (OW/OB) and their links to socio-economic status (SES) and urbanization. A nationwide cross-sectional survey. Secondary schools in cities, towns and villages in Botswana, Africa. A total of 746 adolescent schoolchildren. OW/OB is associated with greater SES, city residence and a snack-food diet pattern. Students belonging to higher SES compared with those from a lower SES background reported significantly (P snack foods (1·55 v. 0·76) and fewer servings of traditional diet foods (0·99 v. 1·68) and also reported that they ate meals outside the home more often (90% v. 72%). Students in cities ate significantly (P snacks (1·69 v. 1·05 v. 0·51) and fewer servings of traditional foods (0·67 v. 1·52 v. 1·61) compared with those in urban and rural villages. The odds of OW/OB were increased 1·16-fold with a snack-food diet, a result that was diminished when controlled for SES. These data suggest that nutritional transition occurs at different rates across urbanization and SES levels in Botswana. In cities, increasing the availability of fruit while reducing access to or portion sizes of snack items is important. Emphasis on continued intake of traditional foods may also be helpful as rural areas undergo economic and infrastructural development.

  12. Uncertainty Assessment in Urban Storm Water Drainage Modelling

    DEFF Research Database (Denmark)

    Thorndahl, Søren

    The object of this paper is to make an overall description of the author's PhD study, concerning uncertainties in numerical urban storm water drainage models. Initially an uncertainty localization and assessment of model inputs and parameters as well as uncertainties caused by different model...

  13. MODELLING CHALLENGES TO FORECAST URBAN GOODS DEMAND FOR RAIL

    Directory of Open Access Journals (Sweden)

    Antonio COMI

    2015-12-01

    Full Text Available This paper explores the new research challenges for forecasting urban goods demand by rail. In fact, the growing interest to find urban logistics solutions for improving city sustainability and liveability, mainly due to the reduction of urban road accessibility and environmental constraints, has pushed to explore solutions alternative to the road. Multimodal urban logistics, based on the use of railway, seem an interesting alternative solution, but it remained mainly at conceptual level. Few studies have explored the factors, that push actors to find competitive such a system with respect to the road, and modelling framework for forecasting the relative demand. Therefore, paper reviews the current literature, investigates the factors involved in choosing such a mode, and finally, recalls a recent modelling framework and hence proposes some advancements that allow to point out the rail transport alternative.

  14. Early to Bed: A Study of Adaptation among Sexually Active Urban Adolescent Girls Younger than Age Sixteen.

    Science.gov (United States)

    Martin, Andres; Ruchkin, Vladislav; Caminis, Argyro; Vermeiren, Robert; Henrich, Christopher C.; Schwab-Stone, Mary

    2005-01-01

    Objective: To examine the association between sexual activity among urban adolescent girls and four global measures of psychosocial adaptation (academic motivation, school achievement, depressive symptoms, and expectations about the future). Method: Data derived from the Social and Health Assessment, a self-report survey administered in 1998 to…

  15. The Psychological Armor of Urban Adolescents: Exploring the Influence of Critical Consciousness and Racial Identity on Career Adaptability

    Science.gov (United States)

    Phan, Olivia M.

    2010-01-01

    Deficit-oriented research has ignored the strengths of urban adolescents of color, perpetuating interpretations that they are deviant and pathological (Spencer et al., 2006). Generally unacknowledged by problem-focused perspectives is how youths of color grapple with vulnerability to negative socialization messages, prejudice and discrimination,…

  16. Uncovering and responding to needs for sexual and reproductive health care among poor urban female adolescents in Nicaragua.

    NARCIS (Netherlands)

    Meuwissen, L.E.; Gorter, A.C.; Segura, Z.; Kester, A.D.M.; Knottnerus, J.A.

    2006-01-01

    BACKGROUND: To meet the needs of female adolescents from low-income urban areas for sexual and reproductive health (SRH) care, vouchers providing free-of-charge access to SRH care at 19 primary care clinics were distributed in Managua, Nicaragua. These vouchers substantially increased the use of

  17. Risk and Protective Factors for Alcohol and Marijuana Use among African-American Rural and Urban Adolescents

    Science.gov (United States)

    Clark, Trenette T.; Nguyen, Anh B.; Belgrave, Faye Z.

    2011-01-01

    The purpose of this study was to examine individual, family, peer, and community risk and protective factors associated with past-30-days alcohol and marijuana use among African-American adolescents living in rural and urban communities. This study used data collected from 907 tenth- and twelfth-grade African-American students who completed the…

  18. Impact of Witnessing Violence on Growth Curves for Problem Behaviors among Early Adolescents in Urban and Rural Settings

    Science.gov (United States)

    Farrell, Albert D.; Sullivan, Terri N.

    2004-01-01

    Two studies used latent growth-curve analysis to examine the relation between witnessing violence and changes in problem behaviors (drug use, aggression, and delinquency) and attitudes during early adolescence. In Study 1, six waves of data covering 6th to 8th grades were collected from 731 students in urban schools serving mostly African-American…

  19. Identifying Resilient and Non-Resilient Middle-Adolescents in a Formerly Black-Only Urban School

    Science.gov (United States)

    Mampane, Ruth; Bouwer, Cecilia

    2006-01-01

    The aim in this study was to develop a way of identifying resilient and non-resilient middle adolescents in a formerly black-only urban residential (township) school, in order to ultimately support the development of learners' resilience under stressful circumstances. A Resilience Scale was developed to screen for resilient and non-resilient…

  20. Psychometric properties of the Eating Disorder Examination Questionnaire (EDE-Q and norms for rural and urban adolescent males and females in Mexico.

    Directory of Open Access Journals (Sweden)

    Eva Penelo

    Full Text Available AIMS: To contribute new evidence to the controversy about the factor structure of the Eating Disorder Examination Questionnaire (EDE-Q and to provide, for the first time, norms based on a large adolescent Mexican community sample, regarding sex and area of residence (urban/rural. METHODS: A total of 2928 schoolchildren (1544 females and 1384 males aged 11-18 were assessed with the EDE-Q and other disordered eating questionnaire measures. RESULTS: Confirmatory factor analysis of the attitudinal items of the EDE-Q did not support the four theorized subscales, and a two-factor solution, Restraint and Eating-Shape-Weight concern, showed better fit than the other models examined (RMSEA = .054; measurement invariance for this two-factor model across sex and area of residence was found. Satisfactory internal consistency (ω ≥ .80 and two-week test-retest reliability (ICCa ≥ .84; κ ≥ .56, and evidence for convergent validity with external measures was obtained. The highest attitudinal EDE-Q scores were found for urban females and the lowest scores were found for rural males, whereas the occurrence of key eating disorder behavioural features and compensatory behaviours was similar in both areas of residence. CONCLUSIONS: This study reveals satisfactory psychometric properties and provides population norms of the EDE-Q, which may help clinicians and researchers to interpret the EDE-Q scores of adolescents from urban and rural areas in Mexico.

  1. Psychometric properties of the Eating Disorder Examination Questionnaire (EDE-Q) and norms for rural and urban adolescent males and females in Mexico.

    Science.gov (United States)

    Penelo, Eva; Negrete, América; Portell, Mariona; Raich, Rosa M

    2013-01-01

    To contribute new evidence to the controversy about the factor structure of the Eating Disorder Examination Questionnaire (EDE-Q) and to provide, for the first time, norms based on a large adolescent Mexican community sample, regarding sex and area of residence (urban/rural). A total of 2928 schoolchildren (1544 females and 1384 males) aged 11-18 were assessed with the EDE-Q and other disordered eating questionnaire measures. Confirmatory factor analysis of the attitudinal items of the EDE-Q did not support the four theorized subscales, and a two-factor solution, Restraint and Eating-Shape-Weight concern, showed better fit than the other models examined (RMSEA = .054); measurement invariance for this two-factor model across sex and area of residence was found. Satisfactory internal consistency (ω ≥ .80) and two-week test-retest reliability (ICCa ≥ .84; κ ≥ .56), and evidence for convergent validity with external measures was obtained. The highest attitudinal EDE-Q scores were found for urban females and the lowest scores were found for rural males, whereas the occurrence of key eating disorder behavioural features and compensatory behaviours was similar in both areas of residence. This study reveals satisfactory psychometric properties and provides population norms of the EDE-Q, which may help clinicians and researchers to interpret the EDE-Q scores of adolescents from urban and rural areas in Mexico.

  2. Assessing the accuracy of satellite-derived urban extent over major urban clusters in the WRF model

    Science.gov (United States)

    Xu, Ronghan; Pan, Zharong; Gao, Hao

    2017-07-01

    Urban land use data play a central role in climate change assessments of urbanization process. The Moderate Resolution Imaging Spectroradiometer (MODIS) land use data is employed in the Weather Research and Forecasting (WRF) model. It is important to understand scaling effects of the MODIS urban data before applying to regional climate modelling. In this study, we took the Landsat derived National Land-Use/Land-Cover Dataset (NLCD) of China as the reference data to assess the accuracy of the MODIS urban map. Urban area sizes and spatial agreement of urban pixels were investigated as assessment methods at the national and metropolitan levels over China. Results showed that the accuracies vary from region to region and highlighted strengths and weaknesses of the MODIS data in different metropolitan area. The study provides insights to model communities with the suitability of the MODIS urban data for specific regional modeling.

  3. Asthma Self-Management Goals, Beliefs and Behaviors of Urban African American Adolescents Prior to Transitioning to Adult Health Care.

    Science.gov (United States)

    Gibson-Scipio, Wanda; Gourdin, Dustin; Krouse, Helene J

    2015-01-01

    Adolescence is a unique time of development incorporating a transition from child centered to adult centered health care. This transition period can be particularly challenging for individuals with a chronic disease such as asthma. Inadequate transition planning during adolescence may place an already vulnerable population such as African American adolescents with known health disparities in asthma prevalence, morbidity and mortality at risk for a continuation of poor health outcomes across the lifespan. Central to transition planning for these youth is the core element of developing and prioritizing goals. The purpose of this qualitative study was to explore the asthma self-management goals, beliefs and behaviors of urban African American adolescents prior to transitioning from pediatric to adult health care. A focus group composed of 13 African American adolescents with asthma ages 14-18 years from an urban population was conducted. Responses from transcripts and field notes were reviewed using an iterative process to best characterize asthma self-management goals and beliefs that emerged. Four core themes were identified: 1) medication self-management, 2) social support, 3) independence vs. interdependence, and 4) self-advocacy. Medication self-management included subthemes of rescue medications, controller medications and medication avoidance. The social support theme included three subthemes: peer support, caregiver support and healthcare provider support. Findings suggest that adolescents with asthma form both short term and long term goals. Their goals indicated a need for guided support to facilitate a successful health care transition. Copyright © 2015 Elsevier Inc. All rights reserved.

  4. Multidimensional design for urban space based on the syntactical modeling

    Science.gov (United States)

    Zhu, Qing; Wang, Jingwen

    2005-10-01

    The design of urban space is the process of making better places for people. As the graphical and computational language of space, space syntax focuses specially on making physical connection to integrate people and places. In this paper, the potential important role of space syntax for urban space design is presented. After briefly introducing the basic theory of space syntax model, its advantage comparing with other computational space modeling within GIS and its future development such as the extension to third dimension are discussed. Then the basic syntactical modeling for the corresponding process of spatial design is proposed. The multidimensional design for urban space based on syntactical modeling including morphological, functional, social, perceptual, temporal dimension is separately discussed in detail. Finally, a case study for Kanmen town of Zhejiang province of P.R.China is illustrated by using Axwoman tool.

  5. Food swamps and food deserts in Baltimore City, MD, USA: associations with dietary behaviours among urban adolescent girls.

    Science.gov (United States)

    Hager, Erin R; Cockerham, Alexandra; O'Reilly, Nicole; Harrington, Donna; Harding, James; Hurley, Kristen M; Black, Maureen M

    2017-10-01

    To determine whether living in a food swamp (≥4 corner stores within 0·40 km (0·25 miles) of home) or a food desert (generally, no supermarket or access to healthy foods) is associated with consumption of snacks/desserts or fruits/vegetables, and if neighbourhood-level socio-economic status (SES) confounds relationships. Cross-sectional. Assessments included diet (Youth/Adolescent FFQ, skewed dietary variables normalized) and measured height/weight (BMI-for-age percentiles/Z-scores calculated). A geographic information system geocoded home addresses and mapped food deserts/food swamps. Associations examined using multiple linear regression (MLR) models adjusting for age and BMI-for-age Z-score. Baltimore City, MD, USA. Early adolescent girls (6th/7th grade, n 634; mean age 12·1 years; 90·7 % African American; 52·4 % overweight/obese), recruited from twenty-two urban, low-income schools. Girls' consumption of fruit, vegetables and snacks/desserts: 1·2, 1·7 and 3·4 servings/d, respectively. Girls' food environment: 10·4 % food desert only, 19·1 % food swamp only, 16·1 % both food desert/swamp and 54·4 % neither food desert/swamp. Average median neighbourhood-level household income: $US 35 298. In MLR models, girls living in both food deserts/swamps consumed additional servings of snacks/desserts v. girls living in neither (β=0·13, P=0·029; 3·8 v. 3·2 servings/d). Specifically, girls living in food swamps consumed more snacks/desserts than girls who did not (β=0·16, P=0·003; 3·7 v. 3·1 servings/d), with no confounding effect of neighbourhood-level SES. No associations were identified with food deserts or consumption of fruits/vegetables. Early adolescent girls living in food swamps consumed more snacks/desserts than girls not living in food swamps. Dietary interventions should consider the built environment/food access when addressing adolescent dietary behaviours.

  6. Ecological Modeling: A Tool for the Urban Educator.

    Science.gov (United States)

    Spikes, Frank

    Ecological modeling is a holistic systems level approach to situational analysis which can be used in planning activities for lifelong learning in an urban setting. It is the purpose of this essay to present a discussion of ecological modeling in its pure or conceptual sense and concomitantly to translate this analysis into an effective and…

  7. A discrete-space urban model with environmental amenities

    Science.gov (United States)

    Liaila Tajibaeva; Robert G. Haight; Stephen Polasky

    2008-01-01

    This paper analyzes the effects of providing environmental amenities associated with open space in a discrete-space urban model and characterizes optimal provision of open space across a metropolitan area. The discrete-space model assumes distinct neighborhoods in which developable land is homogeneous within a neighborhood but heterogeneous across neighborhoods. Open...

  8. Dysmenorrhoea in different settings: Are the rural and urban adolescent girls perceiving and managing the dysmenorrhoea problem differently?

    Directory of Open Access Journals (Sweden)

    Avasarala Atchuta

    2008-01-01

    Full Text Available Context: It is well-known that every health problem, not only presents itself with different epidemiological profiles in different population settings, but is also perceived and managed differently. Having knowledge of these variations in its presentations and perceptions in different population settings, for example, in urban and rural settings, will be useful for its successful management. Aim: To study differences in epidemiological profiles, perceptions, socio economic losses, and quality-of-life losses and management of dysmenorrhoea in different settings for effective management. Design and Setting: A comparative cross-sectional study among adolescent school girls (101 girls in urban areas and 79 girls in rural areas in the district of Karimnagar. Materials and Methods: A cross-sectional survey using a pretested questionnaire was conducted among 180 adolescent girls in urban and rural settings. Statistical Analyses Used: Proportions and X 2 test. Results: The prevalence of dysmenorrhoea is 54% (53% in girls in urban areas and 56% in girls in rural areas (X 2 df = 0.1, P = 0.05. Sickness absenteeism (28-48%, socio economic losses, and perceived quality of life losses are more prevalent among girls in urban areas than in girls in rural areas. Girls in rural areas resort to physical labor and other natural methods to obtain relief while the girls in urban areas are mainly depending on medications. Conclusions: Dysmenorrhoea can also be managed effectively by natural methods without resorting to medicines, provided one is psychologically prepared to face it without anxiety.

  9. Urban Early Adolescent Narratives on Sexuality: Accidental and Intentional Influences of Family, Peers, and the Media.

    Science.gov (United States)

    Charmaraman, Linda; McKamey, Corinne

    2011-01-01

    In this paper, we examine the ways that early adolescents talked, interacted, and made references to events in their individual and collective lives during photography-based focus groups about sexuality and relationships. Twenty-three participants (10 boys and 13 girls) were recruited from three urban schools participating in a comprehensive sex education impact evaluation in the Northeast. We analyzed conversational narratives that were elicited in a group process while sharing photos of important people, contexts, and situations, showcasing participants' exploration of sexuality and relationships. Our analysis revealed four main themes: (a) direct and indirect family communication about sexuality, (b) accidental and intentional Internet usage, (c) shared and contested peer knowledge, and (d) school as a direct and indirect learning context. Implications and future directions for practice, research, and policy are explored.

  10. Adolescent coping and neighborhood violence: perceptions, exposure, and urban youths' efforts to deal with danger.

    Science.gov (United States)

    Rasmussen, Andrew; Aber, Mark S; Bhana, Arvinkumar

    2004-03-01

    Neighborhood violence is a persistent source of danger, stress, and other adverse outcomes for urban youth. We examined how 140 African American and Latino adolescents coped with neighborhood danger in low, medium, and high crime neighborhoods throughout Chicago. Participants reported using a range of coping strategies (measured via a modified version of the Ways of Coping Scale; R. S. Lazarus & S. Folkman, 1984). In low and medium crime rate areas, using confrontive strategies was significantly correlated with increased exposure to violence, and no strategies were associated with perceptions of safety. Coping strategies were associated with perceived safety to a substantial degree only in high crime neighborhoods, and none were associated with exposure to violence. A k means cluster analysis identified groups that differed in coping profiles and varied in rates of exposure to violence. Moderating effects of gender, ethnicity, and neighborhood were found for both person level and variable level analyses.

  11. Weight- and race-based bullying: health associations among urban adolescents.

    Science.gov (United States)

    Rosenthal, Lisa; Earnshaw, Valerie A; Carroll-Scott, Amy; Henderson, Kathryn E; Peters, Susan M; McCaslin, Catherine; Ickovics, Jeannette R

    2015-04-01

    Stigma-based bullying is associated with negative mental and physical health outcomes. In a longitudinal study, surveys and physical assessments were conducted with mostly Black and Latino, socioeconomically disadvantaged, urban students. As hypothesized, greater weight- and race-based bullying each was significantly indirectly associated with increased blood pressure and body mass index, as well as decreased overall self-rated health across 2 years, through the mechanism of more negative emotional symptoms. Results support important avenues for future research on mechanisms and longitudinal associations of stigma-based bullying with health. Interventions are needed to reduce stigma-based bullying and buffer adolescents from adverse health effects. © The Author(s) 2013.

  12. Adolescent Rites of Passage: An Experiential Model.

    Science.gov (United States)

    Venable, Stephen F.

    1997-01-01

    Discusses the origins and context of adolescence as a cultural phenomenon and illustrates how rites of passage can nurture healthy developmental changes in adolescents. Describes and evaluates the application of a rite of passage during a backpacking experience that was designed to usher teens from adolescence to adulthood in a Christian context.…

  13. Exercise and eating habits among urban adolescents: a cross-sectional study in Kolkata, India.

    Science.gov (United States)

    Kumar, Soumitra; Ray, Saumitra; Roy, Debabrata; Ganguly, Kajal; Dutta, Sibananda; Mahapatra, Tanmay; Mahapatra, Sanchita; Gupta, Kinnori; Chakraborty, Kaushik; Das, Mrinal Kanti; Guha, Santanu; Deb, Pradip K; Banerjee, Amal K

    2017-05-18

    Unhealthy eating and lack of exercise during adolescence culminated into earlier onset and increasing burden of atherosclerotic cardiovascular diseases (CVDs) worldwide. Among urban Indian adolescents, prevalence of these risk factors of CVD seemed to be high, but data regarding their pattern and predictors was limited. To address this dearth of information, a survey was conducted among urban adolescent school-students in Kolkata, a highly populated metro city in eastern India. During January-June, 2014, 1755 students of 9th-grade were recruited through cluster (schools) random sampling. Informed consents from parents and assents from adolescents were collected. Information on socio-demographics, CVD-related knowledge and perception along with eating and exercise patterns were collected with an internally validated structured questionnaire. Descriptive and regression analyses were performed in SAS-9.3.2. Among 1652 participants (response rate = 94.1%), about 44% had poor overall knowledge about CVD, 24% perceived themselves as overweight and 60% considered their general health as good. Only 18% perceived their future CVD-risk and 29% were engaged in regular moderate-to-vigorous exercise. While 55% skipped meals regularly, 90% frequently consumed street-foods and 54% demonstrated overall poor eating habits. Males were more likely to engage in moderate-to-vigorous exercise [adjusted odds ratio (AOR) = 3.40(95% confidence interval = 2.55-4.54)] while students of higher SES were less likely [AOR = 0.59(0.37-0.94)]. Males and those having good CVD-related knowledge were more likely to exercise at least 1 h/day [AOR = 7.77(4.61-13.07) and 2.90(1.46-5.78) respectively]. Those who perceived their future CVD-risk, skipped meals more [2.04(1.28-3.25)] while Males skipped them less [AOR = 0.62(0.42-0.93)]. Subjects from middle class ate street-foods less frequently [AOR = 0.45(0.24-0.85)]. Relatively older students and those belonging to higher SES were less

  14. [Social profiles, diet, and prediction of eating disorders in urban andalusian adolescents].

    Science.gov (United States)

    Gil García, Eugenia; Ortiz Gómez, Teresa; Fernández Soto, María Luisa

    2007-01-01

    To know the social profile of Andalusian urban adolescents and analyse the similarities and differences they have with those at risk of presenting with eating disorders. Cross-sectional community study. Stratified cluster sampling. Public and private education institutions in Andalusian cities with more than 100 000 inhabitants (Sevilla, Malaga, Granada, Cordoba, Cadiz, Huelva, Almeria, Jaen, Algeciras, and Jerez). Pupils from 12 to 16 years, attending an academic course in the year 2002-2003 (N=1667). To compare the results of the sample with adolescents who are at risk of presenting with eating disorders (those who scored more than 20 in the 26-item Eating Attitudes Test [EAT-26]) we used the chi2 test for the nominal variables and the Spearman rho for the interval variables, with a significance level of P=.05. There were no differences between either group as regards family structure, friend relationships, academic performance, and sporting activities. The differences centred on disciplinary practices, the number of friends diagnosed with an eating behavioural disorder, the objectives for practicing sports, and the type of diet that they followed. The subjects who scored highest on the EAT-26 were those who had a higher body mass index and a lower social status. It appears that diet changes are a response to certain social conditions. It would be speculative to include subjects who obtain high EAT-26 scores in the population at risk of anorexia.

  15. The effect of correct and consistent condom use on chlamydial and gonococcal infection among urban adolescents.

    Science.gov (United States)

    Paz-Bailey, Gabriela; Koumans, Emilia H; Sternberg, Maya; Pierce, Antonya; Papp, John; Unger, Elizabeth R; Sawyer, Mary; Black, Carolyn M; Markowitz, Lauri E

    2005-06-01

    To evaluate the relationship between self-reported correct and consistent condom use and chlamydial and gonococcal infection. Cross-sectional study. An urban adolescent health care clinic. Patients A total of 509 adolescent girls tested for Chlamydia trachomatis and Neisseria gonorrhoeae infection by urine nucleic acid amplification tests. Main Outcome Measure Effect of condom use on infection rates of chlamydia and gonorrhea. Consistent condom use was defined as using condoms for every act of vaginal sex and correct use as consistent use without any of the following: beginning sex without a condom, taking it off before finishing sex, flipping it over, condom breakage, or condom slippage. A total of 95% of the participants were African American, with a mean age of 16.6 years. Chlamydia prevalence was 21% (105/509) and gonorrhea prevalence was 7% (36/509). Condom errors were reported by 316 (71%) of 442 participants who had reported using a condom at least once in the previous 3 months. Consistent use was reported by 176 patients (35%); however, both correct and consistent use was reported by only 80 patients (16%). After adjusting for confounders, correct and consistent use was protective for chlamydia (odds ratio, 0.4; 95% confidence interval, 0.2-1.0) and highly protective for gonorrhea (odds ratio, 0.1; 95% confidence interval, 0-0.7). Our findings indicate that assessing both correctness and consistency of use is important for evaluation of condom effectiveness.

  16. High resolution modelling of extreme precipitation events in urban areas

    Science.gov (United States)

    Siemerink, Martijn; Volp, Nicolette; Schuurmans, Wytze; Deckers, Dave

    2015-04-01

    The present day society needs to adjust to the effects of climate change. More extreme weather conditions are expected, which can lead to longer periods of drought, but also to more extreme precipitation events. Urban water systems are not designed for such extreme events. Most sewer systems are not able to drain the excessive storm water, causing urban flooding. This leads to high economic damage. In order to take appropriate measures against extreme urban storms, detailed knowledge about the behaviour of the urban water system above and below the streets is required. To investigate the behaviour of urban water systems during extreme precipitation events new assessment tools are necessary. These tools should provide a detailed and integral description of the flow in the full domain of overland runoff, sewer flow, surface water flow and groundwater flow. We developed a new assessment tool, called 3Di, which provides detailed insight in the urban water system. This tool is based on a new numerical methodology that can accurately deal with the interaction between overland runoff, sewer flow and surface water flow. A one-dimensional model for the sewer system and open channel flow is fully coupled to a two-dimensional depth-averaged model that simulates the overland flow. The tool uses a subgrid-based approach in order to take high resolution information of the sewer system and of the terrain into account [1, 2]. The combination of using the high resolution information and the subgrid based approach results in an accurate and efficient modelling tool. It is now possible to simulate entire urban water systems using extreme high resolution (0.5m x 0.5m) terrain data in combination with a detailed sewer and surface water network representation. The new tool has been tested in several Dutch cities, such as Rotterdam, Amsterdam and The Hague. We will present the results of an extreme precipitation event in the city of Schiedam (The Netherlands). This city deals with

  17. Urban weather data and building models for the inclusion of the urban heat island effect in building performance simulation.

    Science.gov (United States)

    Palme, M; Inostroza, L; Villacreses, G; Lobato, A; Carrasco, C

    2017-10-01

    This data article presents files supporting calculation for urban heat island (UHI) inclusion in building performance simulation (BPS). Methodology is used in the research article "From urban climate to energy consumption. Enhancing building performance simulation by including the urban heat island effect" (Palme et al., 2017) [1]. In this research, a Geographical Information System (GIS) study is done in order to statistically represent the most important urban scenarios of four South-American cities (Guayaquil, Lima, Antofagasta and Valparaíso). Then, a Principal Component Analysis (PCA) is done to obtain reference Urban Tissues Categories (UTC) to be used in urban weather simulation. The urban weather files are generated by using the Urban Weather Generator (UWG) software (version 4.1 beta). Finally, BPS is run out with the Transient System Simulation (TRNSYS) software (version 17). In this data paper, four sets of data are presented: 1) PCA data (excel) to explain how to group different urban samples in representative UTC; 2) UWG data (text) to reproduce the Urban Weather Generation for the UTC used in the four cities (4 UTC in Lima, Guayaquil, Antofagasta and 5 UTC in Valparaíso); 3) weather data (text) with the resulting rural and urban weather; 4) BPS models (text) data containing the TRNSYS models (four building models).

  18. Urban weather data and building models for the inclusion of the urban heat island effect in building performance simulation

    Directory of Open Access Journals (Sweden)

    M. Palme

    2017-10-01

    Full Text Available This data article presents files supporting calculation for urban heat island (UHI inclusion in building performance simulation (BPS. Methodology is used in the research article “From urban climate to energy consumption. Enhancing building performance simulation by including the urban heat island effect” (Palme et al., 2017 [1]. In this research, a Geographical Information System (GIS study is done in order to statistically represent the most important urban scenarios of four South-American cities (Guayaquil, Lima, Antofagasta and Valparaíso. Then, a Principal Component Analysis (PCA is done to obtain reference Urban Tissues Categories (UTC to be used in urban weather simulation. The urban weather files are generated by using the Urban Weather Generator (UWG software (version 4.1 beta. Finally, BPS is run out with the Transient System Simulation (TRNSYS software (version 17. In this data paper, four sets of data are presented: 1 PCA data (excel to explain how to group different urban samples in representative UTC; 2 UWG data (text to reproduce the Urban Weather Generation for the UTC used in the four cities (4 UTC in Lima, Guayaquil, Antofagasta and 5 UTC in Valparaíso; 3 weather data (text with the resulting rural and urban weather; 4 BPS models (text data containing the TRNSYS models (four building models.

  19. A neural network based model for urban noise prediction.

    Science.gov (United States)

    Genaro, N; Torija, A; Ramos-Ridao, A; Requena, I; Ruiz, D P; Zamorano, M

    2010-10-01

    Noise is a global problem. In 1972 the World Health Organization (WHO) classified noise as a pollutant. Since then, most industrialized countries have enacted laws and local regulations to prevent and reduce acoustic environmental pollution. A further aim is to alert people to the dangers of this type of pollution. In this context, urban planners need to have tools that allow them to evaluate the degree of acoustic pollution. Scientists in many countries have modeled urban noise, using a wide range of approaches, but their results have not been as good as expected. This paper describes a model developed for the prediction of environmental urban noise using Soft Computing techniques, namely Artificial Neural Networks (ANN). The model is based on the analysis of variables regarded as influential by experts in the field and was applied to data collected on different types of streets. The results were compared to those obtained with other models. The study found that the ANN system was able to predict urban noise with greater accuracy, and thus, was an improvement over those models. The principal component analysis (PCA) was also used to try to simplify the model. Although there was a slight decline in the accuracy of the results, the values obtained were also quite acceptable.

  20. Prevalence of overweight and obesity among the urban adolescent English Medium School girls of Kolkata, India.

    Directory of Open Access Journals (Sweden)

    Arpita Mandal (Nandi

    2012-09-01

    Full Text Available

    Background: the prevalence of child obesity is increasing rapidly worldwide. In developing countries such as India, especially in urban populations, childhood obesity is emerging as a major health problem. In view of these contexts, the present study was undertaken to estimate the prevalence of overweight and obesity in an urban population of girl adolescent students attending the English Medium School in Kolkata, India.

    Methods: a total of 571 girl students, aged 12-18 years, were evaluated. Cole et al. (2000 recommended cut-off points were utilized to assess overweight and obesity.

    Results: the overall prevalence rates of overweight and obesity were 28.5% and 4.2% respectively. The rate of overweight was the highest when compared with that of different parts of India, including Kolkata, and also when compared to rates from the USA and Great Britain.

    Conclusions: in the context of the present study, it can be presumed that, the higher prevalence of overweight in these school children may be due to their eating habits, as well as to their lack of awareness on proper eating habits. In addition, low involvement in physical activities may also have influenced the rate of overweight and obesity. Thus, it can be concluded that the study definitely highlighted the existence of an obesity threat, which is likely to persist among Bengalee school children of wealthier families.

  1. Prevalence of overweight, obesity, and thinness among urban school-aged children and adolescents in southern Nigeria.

    Science.gov (United States)

    Ene-Obong, Henrietta; Ibeanu, Vivian; Onuoha, NneOla; Ejekwu, Ada

    2012-12-01

    Overweight and obesity are public health problems all over the world because of their devastating social, economic, and health consequences, and they coexist with undernutrition in developing countries. Yet, there are few data on the magnitude of these problems in Nigeria. To assess the prevalence of overweight, obesity, and thinness among urban school-aged children and adolescents. A cross-sectional study of 1,599 children and adolescents 5 to 18 years of age was conducted. The subjects were randomly selected from schools in four urban towns (Lagos, Port Harcourt, Nsukka, and Aba) in southern Nigeria. A validated and pretested questionnaire was used to collect information on the background of the children and adolescents and their parents' socioeconomic status. Weight and height measurements were taken, and body mass indexes were calculated. Overweight, obesity, and thinness were defined according to the International Obesity Task Force cutoff points for children and adolescents 2 to 18 years of age. The data were analyzed by descriptive statistics, cross tabulations, and chi-squared tests. The prevalence rates of overweight, obesity, and thinness were 11.4%, 2.8%, and 13.0%, respectively. More females (3.7%) than males (1.8%) were obese (p overweight was higher among adolescents 10 to 18 years of age (13%) than among children 5 to 9 years of age (9.4%) (p overweight, obesity, and thinness. The rates of overweight, obesity, and thinness were affected by location and income levels. The prevalence rates of overweight and obesity are increasing among urban Nigerian children and adolescents and are of equal magnitude to the prevalence of undernutrition.

  2. Perceived discrimination and antisocial behaviour among Chinese rural-to-urban migrant adolescents: Mediating effects of social support.

    Science.gov (United States)

    Jia, Xuji; Liu, Xia

    2017-08-01

    Using cross-sectional data from rural-to-urban migrant adolescents in urban areas of Beijing, China, we examined the mediating effects of social support (i.e. teacher support and classmate support) in the relationship between perceived discrimination (PD) and antisocial behaviour (ASB) among Chinese migrant adolescents. Participants were 897 adolescents (459 boys and 438 girls, mean age = 13.34 years) from four migrant schools (68.8%) and four public schools (31.2%). Participants completed self-report questionnaires concerning PD, ASB, teacher support and classmate support. Results indicated that Chinese migrant adolescents who perceived more discrimination were more likely to engage in ASB. Teacher support partially mediated the relationship between PD and ASB. Gender moderated this mediational relationship, such that teacher support exerted a mediating role among girls, but not boys. The findings suggest that reductions in teacher support may partially account for the effect of PD on ASB among Chinese migrant adolescents girls. © 2016 International Union of Psychological Science.

  3. URBAN MODELLING PERFORMANCE OF NEXT GENERATION SAR MISSIONS

    Directory of Open Access Journals (Sweden)

    U. G. Sefercik

    2017-09-01

    Full Text Available In synthetic aperture radar (SAR technology, urban mapping and modelling have become possible with revolutionary missions TerraSAR-X (TSX and Cosmo-SkyMed (CSK since 2007. These satellites offer 1m spatial resolution in high-resolution spotlight imaging mode and capable for high quality digital surface model (DSM acquisition for urban areas utilizing interferometric SAR (InSAR technology. With the advantage of independent generation from seasonal weather conditions, TSX and CSK DSMs are much in demand by scientific users. The performance of SAR DSMs is influenced by the distortions such as layover, foreshortening, shadow and double-bounce depend up on imaging geometry. In this study, the potential of DSMs derived from convenient 1m high-resolution spotlight (HS InSAR pairs of CSK and TSX is validated by model-to-model absolute and relative accuracy estimations in an urban area. For the verification, an airborne laser scanning (ALS DSM of the study area was used as the reference model. Results demonstrated that TSX and CSK urban DSMs are compatible in open, built-up and forest land forms with the absolute accuracy of 8–10 m. The relative accuracies based on the coherence of neighbouring pixels are superior to absolute accuracies both for CSK and TSX.

  4. Urban Modelling Performance of Next Generation SAR Missions

    Science.gov (United States)

    Sefercik, U. G.; Yastikli, N.; Atalay, C.

    2017-09-01

    In synthetic aperture radar (SAR) technology, urban mapping and modelling have become possible with revolutionary missions TerraSAR-X (TSX) and Cosmo-SkyMed (CSK) since 2007. These satellites offer 1m spatial resolution in high-resolution spotlight imaging mode and capable for high quality digital surface model (DSM) acquisition for urban areas utilizing interferometric SAR (InSAR) technology. With the advantage of independent generation from seasonal weather conditions, TSX and CSK DSMs are much in demand by scientific users. The performance of SAR DSMs is influenced by the distortions such as layover, foreshortening, shadow and double-bounce depend up on imaging geometry. In this study, the potential of DSMs derived from convenient 1m high-resolution spotlight (HS) InSAR pairs of CSK and TSX is validated by model-to-model absolute and relative accuracy estimations in an urban area. For the verification, an airborne laser scanning (ALS) DSM of the study area was used as the reference model. Results demonstrated that TSX and CSK urban DSMs are compatible in open, built-up and forest land forms with the absolute accuracy of 8-10 m. The relative accuracies based on the coherence of neighbouring pixels are superior to absolute accuracies both for CSK and TSX.

  5. Urban versus rural lifestyle in adolescents: associations between environment, physical activity levels and sedentary behavior.

    Science.gov (United States)

    Regis, Manuela Ferreira; Oliveira, Luciano Machado Ferreira Tenório de; Santos, Ana Raquel Mendes Dos; Leonidio, Ameliane da Conceição Reubens; Diniz, Paula Rejane Beserra; Freitas, Clara Maria Silvestre Monteiro de

    2016-01-01

    To analyze the levels of physical activity and sedentary behavior in adolescents living in urban and rural areas. An epidemiological, cross-section study with quantitative design, carried out at the regional level. The sample comprised 6,234 students aged 14 to 19 years, selected using random cluster sampling. The χ2 test and binary logistic regression were used in the analysis. A total of 74.5% of adolescents lived in urban areas. After adjustment, rural residents spent less time watching television (odds ratio - OR: 0.45; 95% confidence interval - 95%CI: 0.39-0.52), using a computer and/or playing video games (OR: 0.30; 95%CI: 0.22-0.42), or sitting down (OR: 0.66; 95%CI: 0.54-0.80); chose passive leisure less often (OR: 0.83; 95%IC: 0.72-0.95) and were less likely to be classified as insufficiently active (OR: 0.88; 95%IC: 0.78-0.99) when compared to urban residents, regardless of sex or age. The fact that adolescents living in rural areas who did not work were more likely to be classified as insufficiently active (OR: 2.59; 95%CI: 2.07-3.24) emphasized the significant role of occupation in physical activity levels in this group. Adolescents living in rural areas were less exposed to the sedentary behaviors, chose more active leisure, and had higher levels of physical activity. Place of residence and occupation may play a major role in youth lifestyle. Analisar os níveis de atividade física e o comportamento sedentário em adolescentes das áreas urbanas e rurais. Estudo epidemiológico, transversal, com abordagem quantitativa e abrangência estadual, cuja amostra foi constituída por 6.234 estudantes (14 a 19 anos), selecionados por meio de uma estratégia de amostragem aleatória de conglomerados. As análises foram realizadas por meio do teste χ2 e da regressão logística binária. Na amostra, 74,5% dos adolescentes eram residentes em área urbana. Após o ajuste, constatou-se que os adolescentes oriundos da área rural usavam menos televisão (odds

  6. Modelling remediation options for urban contamination situations

    DEFF Research Database (Denmark)

    Thiessen, K.M.; Andersson, Kasper Grann; Charnock, T.W.

    2009-01-01

    and remedial options enables the evaluation of a variety of situations or alternative recovery strategies in contexts of preparedness or decision-making. At present a number of models and modelling approaches are available for different purposes. This paper summarizes the available modelling approaches...

  7. Parent-Adolescent Communication and the Circumplex Model.

    Science.gov (United States)

    Barnes, Howard L.; Olson, David H.

    1985-01-01

    Used fathers, mothers, and adolescents from 426 "normal" families in a study of the Circumplex Model of Marital and Family Systems. Results indicated generational differences between how communication was perceived, but findings at the family level indicated a linear relationship between parent-adolescent communication and cohesion and…

  8. Can green roofs reduce urban heat stress in vulnerable urban communities: A coupled atmospheric and social modeling approach

    Science.gov (United States)

    Sharma, A.; Woodruff, S.; Budhathoki, M.; Hamlet, A. F.; Fernando, H. J. S.; Chen, F.

    2017-12-01

    Urban areas provide organized, engineered, sociological and economical infrastructure designed to provide a high quality of life, but the implementation and management of urban infrastructure has been a continued challenge. Increasing urbanization, warming climate, as well as anthropogenic heat emissions that accompany urban development generates "stress". This rapidly increasing `urban stress' affects the sustainability of cities, making populations more vulnerable to extreme hazards, such as heat. Cities are beginning to extensively use green roofs as a potential urban heat mitigation strategy. This study explores the potential of green roofs to reduce summertime temperatures in the most vulnerable neighborhoods of the Chicago metropolitan area by combining social vulnerability indices (a function of exposure, sensitivity and adaptive capacity), and temperatures from mesoscale model. Numerical simulations using urbanized version the Advanced Research Weather Research and Forecasting (WRF) model were performed to measure rooftop temperatures, a representative variable for exposure in this study. The WRF simulations were dynamically coupled with a green roof algorithm as a part of urban parameterization within WRF. Specifically, the study examines roof surface temperature with changing green roof fractions and how would they help reduce exposure to heat stress for vulnerable urban communities. This study shows an example of applied research that can directly benefit urban communities and be used by urban planners to evaluate mitigation strategies.

  9. [An Analysis on the Association between Lipid Metabolism and Low Birth Body Mass and Relative Factors among Rural and Urban Adolescents].

    Science.gov (United States)

    Liu, Shao-ying; Wang, Tong; Xie, Juan; Zhi, Xin-yue

    2016-04-01

    To analyze the status of lipid metabolism and the relationship between low birth body mass and lipid metabolism disorders in adolescents with different economic and cultural backgrounds. Totally 1700 adolescents from urban and rural areas aged 12-18 years were selected in 2013. The lipid profiles were determined, and a questionnaire-based survey was conducted. Among normal birth body mass adolescents, girls obtained a high density lipoprotein in both urban and rural areas, low density lipoprotein cholesterol level was higher for city girls, rural boys and urban girls obtained higher total cholesterol level, the differences all reached statistical significance. While among the low birth body mass adolescents, higher level of total cholesterol for urban boys was detected, with statistically significance. When compared between rural and urban areas, high density lipoprotein cholesterol level for urban adolescents was lower in normal birth body mass adolescents, while total cholesterol level for urban adolescents was higher, both with statistically significance. While the comparison between different birth body mass adolescents suggested that the normal birth body mass adolescents obtained a higher high density lipoprotein cholesterol, low density lipoprotein cholesterol, triglyceride and total cholesterol level. When analyze the influenced factors of disorder of lipid metabolism, the Results suggest that low birth body mass, maternal pregnancy body mass increasing, lipid homeostasis family history, absence of breakfast, unhealthy snack habit, abnormal of systolic blood pressure and pulse pressure increasing were related to the occurrence of dyslipidemia. Low birth body mass is related with lipid metabolism in early puberty. Low birth body mass, family history of abnormal lipid metabolism, and poor diet habits can increase the risk of abnormal lipid metabolism in puberty.

  10. On the added value of WUDAPT for Urban Climate Modelling

    Science.gov (United States)

    Brousse, Oscar; Martilli, Alberto; Mills, Gerald; Bechtel, Benjamin; Hammerberg, Kris; Demuzere, Matthias; Wouters, Hendrik; Van Lipzig, Nicole; Ren, Chao; Feddema, Johannes J.; Masson, Valéry; Ching, Jason

    2017-04-01

    Over half of the planet's population now live in cities and is expected to grow up to 65% by 2050 (United Nations, 2014), most of whom will actually occupy new emerging cities of the global South. Cities' impact on climate is known to be a key driver of environmental change (IPCC, 2014) and has been studied for decades now (Howard, 1875). Still very little is known about our cities' structure around the world, preventing urban climate simulations to be done and hence guidance to be provided for mitigation. Assessing the need to bridge the urban knowledge gap for urban climate modelling perspectives, the World Urban Database and Access Portal Tool - WUDAPT - project (Ching et al., 2015; Mills et al., 2015) developed an innovative technique to map cities globally rapidly and freely. The framework established by Bechtel and Daneke (2012) derives Local Climate Zones (Stewart and Oke, 2012) city maps out of LANDSAT 8 OLI-TIRS imagery (Bechtel et al., 2015) through a supervised classification by a Random Forest Classification algorithm (Breiman, 2001). The first attempt to implement Local Climate Zones (LCZ) out of the WUDAPT product within a major climate model was carried out by Brousse et al. (2016) over Madrid, Spain. This study proved the applicability of LCZs as an enhanced urban parameterization within the WRF model (Chen et al. 2011) employing the urban canopy model BEP-BEM (Martilli, 2002; Salamanca et al., 2010), using the averaged values of the morphological and physical parameters' ranges proposed by Stewart and Oke (2012). Other studies have now used the Local Climate Zones for urban climate modelling purposes (Alexander et al., 2016; Wouters et al. 2016; Hammerberg et al., 2017; Brousse et al., 2017) and demonstrated the added value of the WUDAPT dataset. As urban data accessibility is one of the major challenge for simulations in emerging countries, this presentation will show results of simulations using LCZs and the capacity of the WUDAPT framework to be

  11. Analysis of spatial distribution of Tehran Metropolis urban services using models of urban planning

    Directory of Open Access Journals (Sweden)

    A. Lorestani

    2016-04-01

    Full Text Available The process of spatial distribution of urban services in order to provide equitable access to opportunities and reduced regional disparities, and earning the highest citizen satisfaction are among the main challenges facing urban management. This requires knowledge of the current status of spatial distribution of public services in the city, followed by optimal resource allocation under varying circumstances. This analytical-comparative study aimed to investigate the spatial distribution of urban public services, and rank different districts of Tehran in terms of benefiting from public services. To achieve this goal, quantitative models of planning, including factor analysis, composite Human Development Index, taxonomical model and standardization method were used. For the final ranking of districts of Tehran, the sum of numerical value of each district was calculated in four ways. Based on this method, districts 1, 3, 22, 12 and 6 were ranked first to fifth, and districts 13, 10, 8, 17 and 14 were ranked last, respectively. Using cluster analysis model, different districts of Tehran metropolis were clustered on the basis of numerical value of districts in the models used. Based on above-mentioned results, districts 1, 3, 12, 22, 6 and 21, with a final score of 66 and above, included in the first cluster and identified as over-developed districts; and districts 14, 10, 8 and 17, with a final score of 13 or less, included in the fifth cluster and identified as disadvantaged districts.

  12. Modelling of green roof hydrological performance for urban drainage applications

    DEFF Research Database (Denmark)

    Locatelli, Luca; Mark, Ole; Mikkelsen, Peter Steen

    2014-01-01

    Green roofs are being widely implemented for stormwater management and their impact on the urban hydrological cycle can be evaluated by incorporating them into urban drainage models. This paper presents a model of green roof long term and single event hydrological performance. The model includes...... surface and subsurface storage components representing the overall retention capacity of the green roof which is continuously re-established by evapotranspiration. The runoff from the model is described through a non-linear reservoir approach. The model was calibrated and validated using measurement data...... from 3 different extensive sedum roofs in Denmark. These data consist of high-resolution measurements of runoff, precipitation and atmospheric variables in the period 2010–2012. The hydrological response of green roofs was quantified based on statistical analysis of the results of a 22-year (1989...

  13. Differences in Sexual Practices, Sexual Behavior and HIV Risk Profile between Adolescents and Young Persons in Rural and Urban Nigeria.

    Directory of Open Access Journals (Sweden)

    Morenike Oluwatoyin Folayan

    Full Text Available We aimed to determine differences in sexual practices, HIV sexual risk behaviors, and HIV risk profile of adolescents and young persons' in rural and urban Nigeria.We recruited 772 participants 15 to 24 years old from urban and rural townships in Nigeria through a household survey. Information on participants' socio-demographic profile (age sex, residential area, number of meals taken per day, sexual practices (vagina, oral and anal sex; heterosexual and homosexual sex; sex with spouse, casual acquaintances, boy/girlfriend and commercial sex workers, sexual behavior (age of sexual debut, use of condom, multiple sex partners, transactional sex and age of sexual partner, and other HIV risk factors (use of alcohol and psychoactive substances, reason for sexual debut, knowledge of HIV prevention and HIV transmission, report of STI symptoms were collected through an interviewer administered questionnaire. Differences in sexual behavior and sexual practices of adolescents and HIV risk profile of adolescents and young persons resident in urban and rural areas were determined.More than half (53.5% of the respondents were sexually active, with more residing in the rural than urban areas (64.9% vs 44.1%; p<0.001 and more resident in the rural area reporting having more than one sexual partner (29.5% vs 20.4%; p = 0.04. Also, 97.3% of sexually active respondents reported having vaginal sex, 8.7% reported oral sex and 1.9% reported anal sex. More male than female respondents in the urban area used condoms during the last vaginal sexual intercourse (69.1% vs 51.9%; p = 0.02, and reported sex with casual partners (7.0% vs 15.3%; p = 0.007. More female than male respondents residing in the rural area engaged in transactional sex (1.0% vs 6.7%; p = 0.005. More females than males in both rural (3.6% vs 10.2%; p = 0.04 and urban (4.7% vs 26.6%; p<0.001 areas self-reported a history of discharge. More females than males in both rural (1.4% vs 17.0%; p = 0.04 and

  14. Automatic 3D Modeling of the Urban Landscape

    NARCIS (Netherlands)

    Esteban, I.; Dijk, J.; Groen, F.A.

    2010-01-01

    In this paper we present a fully automatic system for building 3D models of urban areas at the street level. We propose a novel approach for the accurate estimation of the scale consistent camera pose given two previous images. We employ a new method for global optimization and use a novel sampling

  15. Urban drainage models simplifying uncertainty analysis for practitioners

    DEFF Research Database (Denmark)

    Vezzaro, Luca; Mikkelsen, Peter Steen; Deletic, Ana

    2013-01-01

    There is increasing awareness about uncertainties in the modelling of urban drainage systems and, as such, many new methods for uncertainty analyses have been developed. Despite this, all available methods have limitations which restrict their widespread application among practitioners. Here, a m...

  16. Eco-Anthropic Compatibility - a Multidisciplinary Model in Urban Ecology

    Directory of Open Access Journals (Sweden)

    MARIANO L. BIANCA

    2010-01-01

    Full Text Available In this paper I propose a multidisciplinary model of urban development which goes beyond the notion of ecological sustainability, by building on the concept of eco-anthropic compatibility. First of all I will sketch the historical development of human aggregations and I will underline the difference between ancient and modern aggregations. On the basis of this analysis, I will take into consideration the notion of sustainability and its possible application to present conurbations. I will underline several limits of the notion of sustainable development and I will propose a multidisciplinary model grounded on a broader and new notion: the eco-anthropic compatibility. Using this notion, which includes the idea of sustainability, it is possible to handle, within the model, the human factors and human living conditions inside an urban aggregation. Finally, I will state that the actual urban model is decaying and therefore, sooner or later, we will have to face the end of urban civilization; for this reason we can start imagining new future ways for human aggregations on the planet based on the notion of eco-anthropic compatibility.

  17. Grass plants crop water consumption model in urban parks located ...

    African Journals Online (AJOL)

    use

    2011-12-14

    Dec 14, 2011 ... Grass plants crop water consumption model in urban parks located in three different ... The result of calculations, using the climate data of July, value of the province of Antalya were. ETo=7,10464 mm/day, for Ankara .... method is recommended by Food and Agriculture. Organisation (FAO) (Allen et al., ...

  18. The Untried Model of the Urban Community College.

    Science.gov (United States)

    Grede, John F.

    A model for a new type of urban community college is described. It consists of a cluster of five community colleges scattered around the perimeter of a central business district of a large city. Each college concentrates on one of the following specializations: business, creative and performing arts, engineering and industry, health, and public…

  19. Urban modeling over Houston in support of SIMMER

    Science.gov (United States)

    Barlage, M. J.; Monaghan, A. J.; Feddema, J. J.; Oleson, K. W.; Brunsell, N. A.; Wilhelmi, O.

    2011-12-01

    Extreme heat is a leading cause of weather-related human mortality in the United States. As global warming patterns continue, researchers anticipate increases in the severity, frequency and duration of extreme heat events, especially in the southern and western U.S. Many cities in these regions may have amplified vulnerability due to their rapidly evolving socioeconomic fabric (for example, growing elderly populations). This raises a series of questions about the increased health risks of urban residents to extreme heat, and about effective means of mitigation and adaptation in present and future climates. We will introduce a NASA-funded project aimed at addressing these questions via the System for Integrated Modeling of Metropolitan Extreme Heat Risk (SIMMER). Through SIMMER, we hope to advance methodology for assessing current and future urban vulnerabilities from the heat waves through the refinement and integration of physical and social science models, and to build local capacity for heat hazard mitigation and climate change adaptation in the public health sector. We will also present results from a series of sensitivity studies over Houston and surrounding area employing a recently-implemented multi-layer urban canopy model (UCM) within the Noah Land Surface Model. The UCM has multiple layers in the atmosphere to explicitly resolve the effects of buildings, and has an indoor-outdoor exchange model that directly interacts with the atmospheric boundary layer. The goal of this work, which supports the physical science component of SIMMER, is to characterize the ill-defined and uncertain parameter space, including building characteristics and spatial organization, in the new multi-layer UCM for Houston, and to assess whether and how this parameter space is sensitive to the choice of urban morphology datasets. Results focus on the seasonal and inter-annual range of both the modeled urban heat island effect and the magnitude of surface energy components and

  20. A developmental social neuroscience model for understanding loneliness in adolescence.

    Science.gov (United States)

    Wong, Nichol M L; Yeung, Patcy P S; Lee, Tatia M C

    2018-02-01

    Loneliness is prevalent in adolescents. Although it can be a normative experience, children and adolescents who experience loneliness are often at risk for anxiety, depression, and suicide. Research efforts have been made to identify the neurobiological basis of such distressful feelings in our social brain. In adolescents, the social brain is still undergoing significant development, which may contribute to their increased and differential sensitivity to the social environment. Many behavioral studies have shown the significance of attachment security and social skills in adolescents' interactions with the social world. In this review, we propose a developmental social neuroscience model that extends from the social neuroscience model of loneliness. In particular, we argue that the social brain and social skills are both important for the development of adolescents' perceived loneliness and that adolescents' familial attachment sets the baseline for neurobiological development. By reviewing the related behavioral and neuroimaging literature, we propose a developmental social neuroscience model to explain the heightened perception of loneliness in adolescents using social skills and attachment style as neurobiological moderators. We encourage future researchers to investigate adolescents' perceived social connectedness from the developmental neuroscience perspective.

  1. Empirically derived neighbourhood rules for urban land-use modelling

    DEFF Research Database (Denmark)

    Hansen, Henning Sten

    2012-01-01

    interaction between neighbouring land uses is an important component in urban cellular automata. Nevertheless, this component is often calibrated through trial-and-error estimation. The aim of this project has been to develop an empirically derived landscape metric supporting cellular-automata-based land......-use modelling. Through access to very detailed urban land-use data it has been possible to derive neighbourhood rules empirically, and test their sensitivity to the land-use classification applied, the regional variability of the rules, and their time variance. The developed methodology can be implemented...

  2. Modelling and planning urban mobility on long term by age-cohort model

    Directory of Open Access Journals (Sweden)

    Krakutovski Zoran

    2017-01-01

    Full Text Available The modelling and planning of urban mobility on long term is a very complex challenge. The principal sources for analysis of urban mobility are surveys made on particular period of time, usually every ten years. If there are minima two surveys carried out on different period it is possible to make a pseudo-longitudinal data using demographic variables as an age and generation. The temporal modifications of behaviour of population concerning the practice of urban daily mobility are possible to assess using a pseudo-longitudinal data. The decomposition of temporal effects into an effect of age and an effect of generation (cohort makes possible to draw the sample profile during the life cycle and to estimate its temporal deformations. This is the origin of the “age-cohort” model to forecast the urban mobility on long term. The analysis and investigated data from three surveys of urban mobility are related to the urban area Lille in France.

  3. Urbancontext: A Management Model For Pervasive Environments In User-Oriented Urban Computing

    Directory of Open Access Journals (Sweden)

    Claudia L. Zuniga-Canon

    2014-01-01

    Full Text Available Nowadays, urban computing has gained a lot of interest for guiding the evolution of citiesinto intelligent environments. These environments are appropriated for individuals’ inter-actions changing in their behaviors. These changes require new approaches that allow theunderstanding of how urban computing systems should be modeled.In this work we present UrbanContext, a new model for designing of urban computingplatforms that applies the theory of roles to manage the individual’s context in urban envi-ronments. The theory of roles helps to understand the individual’s behavior within a socialenvironment, allowing to model urban computing systems able to adapt to individuals statesand their needs.UrbanContext collects data in urban atmospheres and classifies individuals’ behaviorsaccording to their change of roles, to optimize social interaction and offer secure services.Likewise, UrbanContext serves as a generic model to provide interoperability, and to facilitatethe design, implementation and expansion of urban computing systems.

  4. Precursors of adolescent substance use from early childhood and early adolescence: testing a developmental cascade model.

    Science.gov (United States)

    Sitnick, Stephanie L; Shaw, Daniel S; Hyde, Luke W

    2014-02-01

    This study examined developmentally salient risk and protective factors of adolescent substance use assessed during early childhood and early adolescence using a sample of 310 low-income boys. Child problem behavior and proximal family risk and protective factors (i.e., parenting and maternal depression) during early childhood, as well as child and family factors and peer deviant behavior during adolescence, were explored as potential precursors to later substance use during adolescence using structural equation modeling. Results revealed that early childhood risk and protective factors (i.e., child externalizing problems, mothers' depressive symptomatology, and nurturant parenting) were indirectly related to substance use at the age of 17 via risk and protective factors during early and middle adolescence (i.e., parental knowledge and externalizing problems). The implications of these findings for early prevention and intervention are discussed.

  5. Maternal Work Hours and Adolescents' School Outcomes among Low-Income Families in Four Urban Counties. National Poverty Center Working Paper Series #07-01

    Science.gov (United States)

    Gennetian, Lisa A.; Lopoo, Leonard M.; London, Andrew S.

    2007-01-01

    We examine how changes in maternal work hours affect adolescent children's school participation and performance outcomes using data from interviews in 1998 and 2001 with 1,700 women who in May 1995 were welfare-reliant, single mothers of adolescents living in disadvantaged neighborhoods in four urban counties. We find unfavorable effects of…

  6. Data-driven modeling of solar-powered urban microgrids.

    Science.gov (United States)

    Halu, Arda; Scala, Antonio; Khiyami, Abdulaziz; González, Marta C

    2016-01-01

    Distributed generation takes center stage in today's rapidly changing energy landscape. Particularly, locally matching demand and generation in the form of microgrids is becoming a promising alternative to the central distribution paradigm. Infrastructure networks have long been a major focus of complex networks research with their spatial considerations. We present a systemic study of solar-powered microgrids in the urban context, obeying real hourly consumption patterns and spatial constraints of the city. We propose a microgrid model and study its citywide implementation, identifying the self-sufficiency and temporal properties of microgrids. Using a simple optimization scheme, we find microgrid configurations that result in increased resilience under cost constraints. We characterize load-related failures solving power flows in the networks, and we show the robustness behavior of urban microgrids with respect to optimization using percolation methods. Our findings hint at the existence of an optimal balance between cost and robustness in urban microgrids.

  7. Strategic management in urban environment using SWOT and QSPM model

    Directory of Open Access Journals (Sweden)

    M. Pazouki

    2017-04-01

    Full Text Available Sustainable urban development is a new concept of fundamental environmental metropolitan management that not only creates the demand for changing the concepts of economic development, but also affects social development. The current study  provides  a conceptual model of a sustainable environment pattern In District 22 of Tehran that depends on the relationship between environment and economy, and a network of urban function, which  Included transport infrastructure and community centers and economic and regional level in support of the ecological services in Tehran. This landscape often  had discrepancies  with the development of the city between the layers and the creation of ecological fragile areas. The main objective of the study was to determine the sustainability indicators and create a future development  model  for District 22 of Tehran. The data was collected by having a review of similar studies and field research on the subject and therefore the effective factors were identified. After accomplished proceedings, the questionnaire was prepared and the results were used in SWOT charts' grading after analyzing at interior and exterior matrix. Ultimately, quantitative strategic planning matrix (QSPM was performed based on the results and analysis. This process provided a comprehensive model for sustainable urban development as sustainable development urban landscape pattern.

  8. Socio-Environmental Resilience and Complex Urban Systems Modeling

    Science.gov (United States)

    Deal, Brian; Petri, Aaron; Pan, Haozhi; Goldenberg, Romain; Kalantari, Zahra; Cvetkovic, Vladimir

    2017-04-01

    The increasing pressure of climate change has inspired two normative agendas; socio-technical transitions and socio-ecological resilience, both sharing a complex-systems epistemology (Gillard et al. 2016). Socio-technical solutions include a continuous, massive data gathering exercise now underway in urban places under the guise of developing a 'smart'(er) city. This has led to the creation of data-rich environments where large data sets have become central to monitoring and forming a response to anomalies. Some have argued that these kinds of data sets can help in planning for resilient cities (Norberg and Cumming 2008; Batty 2013). In this paper, we focus on a more nuanced, ecologically based, socio-environmental perspective of resilience planning that is often given less consideration. Here, we broadly discuss (and model) the tightly linked, mutually influenced, social and biophysical subsystems that are critical for understanding urban resilience. We argue for the need to incorporate these sub system linkages into the resilience planning lexicon through the integration of systems models and planning support systems. We make our case by first providing a context for urban resilience from a socio-ecological and planning perspective. We highlight the data needs for this type of resilient planning and compare it to currently collected data streams in various smart city efforts. This helps to define an approach for operationalizing socio-environmental resilience planning using robust systems models and planning support systems. For this, we draw from our experiences in coupling a spatio-temporal land use model (the Landuse Evolution and impact Assessment Model (LEAM)) with water quality and quantity models in Stockholm Sweden. We describe the coupling of these systems models using a robust Planning Support System (PSS) structural framework. We use the coupled model simulations and PSS to analyze the connection between urban land use transformation (social) and water

  9. Beyond the "birds and the bees": gender differences in sex-related communication among urban African-American adolescents.

    Science.gov (United States)

    Kapungu, Chisina Tsvakayi; Baptiste, Donna; Holmbeck, Grayson; McBride, Cami; Robinson-Brown, Melissa; Sturdivant, Allyse; Crown, Laurel; Paikoff, Roberta

    2010-06-01

    The current study examined gender differences in communication about sex-related topics in a community sample of urban, African-American mothers and adolescents living in impoverished neighborhoods with high HIV rates. One hundred and sixty-two mother-adolescent dyads completed self-report measures of sex-related communication. Youth also reported on their sexual risk. We identified the range of sexual-based topics that adolescents discussed with their mothers, fathers, friends, and at school. The relationship between the frequency of sexual communication and sexual risk was examined. We also investigated congruency between adolescent and mother report about whether sexual-based discussions occurred. Consistent with prior research, girls talked to their mothers, fathers, friends, and at school about sex-related topics more than boys. Findings indicated that mothers not only communicated more frequently about sexual issues with their daughters than sons but that parental messages for girls were more protective. Greater sexual communication with mother was significantly associated with decreased HIV risk in the past 90 days and increased protection from HIV. Inconsistencies between mother and adolescent reports about sexual communication were marginally associated with decreased protection from HIV. Findings reveal the protective effect of sexual communication and the general lack of congruence between mother and adolescent reports of sexual communication.

  10. Theories, models and urban realities. From New York to Kathmandu

    OpenAIRE

    Román Rodríguez González

    2004-01-01

    At the beginning of the 21st century, there are various social theories that speak of global changes in the history of human civilization. Urban models have been through obvious changes throughout the last century according to the important transformation that are pro-posed by previous general theories. Nevertheless global diversity contradicts the generaliza-tion of these theories and models. From our own simple observations and reflections we arrive at conclusions that distance themselves f...

  11. Measuring Anger Types among Malaysian Adolescents using the Rasch Model.

    Science.gov (United States)

    Khairani, Ahmad Zamri; Ahmad, Nor Shafrin; Khairani, Mohd Zahuri

    Adolescences is an important transitional phase in human development where they experience physiological as well as psychological changes. Nevertheless, these changes are often understood by teachers, parents, and even the adolescents themselves. Thus, conflicts exist and adolescents are affected from the conflict physically and emotionally. An important state of emotions that result from this conflict is anger. This article describes the development and validation of the 34-item Adolescent Anger Inventory (AAI) to measure types of anger among Malaysian adolescents. A sample of 2,834 adolescents in secondary school who provide responses that were analyzed using Rasch model measurement framework. The 4 response category worked satisfactorily for the scale developed. A total of 11 items did not fit to the model's expectations, and thus dropped from the final scale. The scale also demonstrated satisfactory reliability and separation evidence. Also, items in the AAI depicted no evidence of DIF between 14- and 16-year-old adolescents. Nevertheless, the AAI did not have sufficient items to target adolescents with a high level of physical aggressive anger.

  12. Differences in Sexual Practices, Sexual Behavior and HIV Risk Profile between Adolescents and Young Persons in Rural and Urban Nigeria.

    Science.gov (United States)

    Folayan, Morenike Oluwatoyin; Adebajo, Sylvia; Adeyemi, Adedayo; Ogungbemi, Kayode Micheal

    2015-01-01

    We aimed to determine differences in sexual practices, HIV sexual risk behaviors, and HIV risk profile of adolescents and young persons' in rural and urban Nigeria. We recruited 772 participants 15 to 24 years old from urban and rural townships in Nigeria through a household survey. Information on participants' socio-demographic profile (age sex, residential area, number of meals taken per day), sexual practices (vagina, oral and anal sex; heterosexual and homosexual sex; sex with spouse, casual acquaintances, boy/girlfriend and commercial sex workers), sexual behavior (age of sexual debut, use of condom, multiple sex partners, transactional sex and age of sexual partner), and other HIV risk factors (use of alcohol and psychoactive substances, reason for sexual debut, knowledge of HIV prevention and HIV transmission, report of STI symptoms) were collected through an interviewer administered questionnaire. Differences in sexual behavior and sexual practices of adolescents and HIV risk profile of adolescents and young persons resident in urban and rural areas were determined. More than half (53.5%) of the respondents were sexually active, with more residing in the rural than urban areas (64.9% vs 44.1%; psexual partner (29.5% vs 20.4%; p = 0.04). Also, 97.3% of sexually active respondents reported having vaginal sex, 8.7% reported oral sex and 1.9% reported anal sex. More male than female respondents in the urban area used condoms during the last vaginal sexual intercourse (69.1% vs 51.9%; p = 0.02), and reported sex with casual partners (7.0% vs 15.3%; p = 0.007). More female than male respondents residing in the rural area engaged in transactional sex (1.0% vs 6.7%; p = 0.005). More females than males in both rural (3.6% vs 10.2%; p = 0.04) and urban (4.7% vs 26.6%; psexual behavior and practices of adolescents and young persons' residing in the urban and rural area with implication for HIV prevention programming.

  13. Using the Theory of Planned Behavior to Examine Beliefs About Verbal Sexual Coercion Among Urban Black Adolescents.

    Science.gov (United States)

    Eaton, Asia A; Stephens, Dionne P

    2016-07-01

    This study used the theory of planned behavior to identify urban Black adolescents' beliefs about male-to-female verbal sexual coercion. Interviews were conducted with 91 urban, Black adolescents (53 boys and 38 girls) to identify their behavioral, normative, and control beliefs about verbal sexual coercion perpetration (for males) and resistance (for females). Boys reported that perpetrating verbal sexual coercion could result in negative relationship outcomes, and the main benefit of using this tactic was to obtain sex. Unsupportive peers and some male family members were seen as encouraging boys to use verbal sexual coercion, whereas parents were seen as opposed to the use of coercion. Being in a private context with a girl and having persuasive skill were seen as facilitating the use of coercion, whereas being with an experienced or skilled girl was a barrier. For girls, positive relationship outcomes and sexual health risks were the benefits and pitfalls of resisting verbal sexual coercion. "Real" friends and family were described as supporting girls' resistance to coercion, while "fake" friends, promiscuous girls, and male peers were seen as not supporting resistance. Girls believed being in a safe, public context would make it easier to resist coercion, while being in a stable relationship with an attractive and persistent partner would make it more difficult to resist. Knowing urban, Black adolescents' beliefs about verbal sexual coercion is the first step toward predicting and intervening on their perpetration and resistance behaviors.

  14. Models in Planning Urban Public Passenger Transport

    Directory of Open Access Journals (Sweden)

    Gordana Štefančić

    2007-07-01

    Full Text Available The solving of complex problems in public transport requiresthe usage of models that are based on the estimate of demandin planning the transport routes. The intention is to predictwhat is going to happen in the future, if the proposed solutionsare implemented. In the majority of cases, the publictransport system is formed as a network and stored in the computermemory in order to start the evaluation process by specifYingthe number of trip origins and destinations in each zone.The trip distribution model which is used to calculate the numberof trips between each pair in the zone is based on the overalltravel frictions from zone to zone.

  15. A dispersion modelling system for urban air pollution

    Energy Technology Data Exchange (ETDEWEB)

    Karppinen, A.; Kukkonen, J.; Nordlund, G.; Rantakrans, E.; Valkama, I.

    1998-10-01

    An Urban Dispersion Modelling system UDM-FMI, developed at the Finnish Meteorological Institute is described in the report. The modelling system includes a multiple source Gaussian plume model and a meteorological pre-processing model. The dispersion model is an integrated urban scale model, taking into account of all source categories (point, line, area and volume sources). It includes a treatment of chemical transformation (for NO{sub 2}) wet and dry deposition (for SO{sub 2}) plume rise, downwash phenomena and dispersion of inert particles. The model allows also for the influence of a finite mixing height. The model structure is mainly based on the state-of-the-art methodology. The system also computes statistical parameters from the time series, which can be compared to air quality guidelines. The relevant meteorological parameters for the dispersion model are evaluated using data produced by a meteorological pre-processor. The model is based mainly on the energy budget method. Results of national investigations have been used for evaluating climate-dependent parameters. The model utilises the synoptic meteorological observations, radiation records and aerological sounding observations. The model results include the hourly time series of the relevant atmospheric turbulence 51 refs.

  16. Driving under the influence of alcohol or drugs among adolescents: the role of urban and rural environments.

    Science.gov (United States)

    Font-Ribera, Laia; Garcia-Continente, Xavier; Pérez, Anna; Torres, Rosa; Sala, Núria; Espelt, Albert; Nebot, Manel

    2013-11-01

    This study aimed to describe driving under the influence of alcohol or drugs (DUIAD) and riding in a vehicle with a driver under the influence of alcohol or drugs (RDUIAD) and their associated factors among rural and urban adolescents in Spain. We performed a cross-sectional study including 2067 students from Barcelona and a rural area 60 km north of this city. The prevalences of ever DUIAD and RDUIAD were 17% and 41% among 17-18 year-old adolescents. DUIAD was more common in boys. Living in the rural area was independently associated with these behaviours. Exposure to these behaviours is common among Spanish adolescents, especially in rural areas. Copyright © 2013 Elsevier Ltd. All rights reserved.

  17. Urban Morphology Influence on Urban Albedo: A Revisit with the S olene Model

    Science.gov (United States)

    Groleau, Dominique; Mestayer, Patrice G.

    2013-05-01

    This heuristic study of the urban morphology influence on urban albedo is based on some 3,500 simulations with the S olene model. The studied configurations include square blocks in regular and staggered rows, rectangular blocks with different street widths, cross-shaped blocks, infinite street canyons and several actual districts in Marseilles, Toulouse and Nantes, France. The scanned variables are plan density, facade density, building height, layout orientation, latitude, date and time of the day. The sky-view factors of the ground and canopy surfaces are also considered. This study demonstrates the significance of the facade density, in addition to the built plan density, as the explanatory geometrical factor to characterize the urban morphology, rather than building height. On the basis of these albedo calculations the puzzling results of Kondo et al. (Boundary-Layer Meteorol 100:225-242, 2001) for the influence of building height are explained, and the plan density influence is quantitatively assessed. It is shown that the albedo relationship with plan and facade densities obtained with the regular square plot configuration may be considered as a reference for all other configurations, with the exception of the infinite street canyon that shows systematic differences for the lower plan densities. The curves representing this empirical relationship may be used as a sort of abacus for all other geometries while an approximate simple mathematical model is proposed, as well as relationships between the albedo and sky-view factors.

  18. Development of the multi-scale model for urban climate analysis and evaluation of urban greening effects on energy consumption

    Science.gov (United States)

    Hamano, H.; Nakayama, T.; Fujita, T.; Hori, H.; Tagami, H.

    2009-12-01

    It is necessary to reduce Greenhouse gases (GHG) emissions drastically to stabilize climate change, and Japan is also required to assess its long-term global warming policy. In achieving the low carbon society and sustainable cities, the numerical evaluation of environmental impacts of the application of different technologies and policies was preliminarily examined by utilizing integrative urban environmental model. This research aims to develop the multi-scale model for urban climate analysis and to evaluate the urban greening effects on energy consumption from household and business sectors. It developed the multi-scale model combined the process-based NIES integrated catchment-based eco-hydrology (NICE) model with the meso-scale meteorological model (Regional Atmospheric Modeling System : RAMS) and urban canopy model to estimate the urban climate mitigation effects by introduction of urban heat environmental mitigation technology and scenario. The numerical simulation conducted with the multi-scale level horizontally consisting regional scale (260×260km with 2km grid) and urban area scale (36×26km with 0.2km grid) against the objective area, Kawasaki city of Japan. The urban canopy model predicts the three dimensional atmospheric conditions including anthropogenic heat effect from household, business and factory sectors. Furthermore the tile method applied into the urban canopy model for the improvement of numerical accuracy and detailed land use information in each grid. The validation of this model was conducted by comparison with the observed air temperature of 29 points in entire Kawasaki area from 1st to 31th of August, 2006. From the quantitative validation of model performance, the coefficient of correlation was 0.72 and the root mean square error was 2.99C. The introduction of patch method into urban canopy model made it possible to calculate the each land use effect, and the accuracy of predicted results was improved against the land use area

  19. Modeling of Urban Heat Island at Global Scale

    Science.gov (United States)

    KC, B.; Ruth, M.

    2015-12-01

    Urban Heat Island (UHI) is the temperature difference between urban and its rural background temperature. At the local level, the choice of building materials and urban geometry are vital in determining the UHI magnitude of a city. At the city scale, economic growth, population, climate, and land use dynamics are the main drivers behind changes in UHIs. The main objective of this paper is to provide a comprehensive assessment of UHI based on these "macro variables" at regional and global scale. We based our analysis on published research for Europe, North America, and Asia, reporting data for 83 cities across the globe with unique climatic, economic, and environmental conditions. Exploratory data analysis including Pearson correlation was performed to explore the relationship between UHI and PM2.5 (particulate matter with aerodynamic diameter ≤5 microns), PM10 (particulate matter with aerodynamic diameter ≤10 microns), vegetation per capita, built area, Gross Domestic Product (GDP), population density and population. Additionally, dummy variables were used to capture potential influences of climate types (based on Koppen classifications) and the ways by which UHI was measured. We developed three linear regression models, one for each of the three continents (Asia, Europe, and North America) and one model for all the cities across these continents. This study provides a unique perspective for predicting UHI magnitudes at large scales based on economic activity and pollution levels of a city, which has important implications in urban planning.

  20. Modern Models of Urban Development: From Opposition to Combination

    Directory of Open Access Journals (Sweden)

    Daniil Petrovich Frolov

    2016-09-01

    Full Text Available The article provides a systematic review of empirical models of urban development. The authors identify eight key modern models (service, comfortable (amenities-oriented, compact, ‘green’, studying, creative, ‘smart’ and social city which are traditionally considered by developers of urban strategies as alternatives. The researchers prove the necessity of combinatory use of mentioned models instead of their opposition, i. e. priority directions of modern cities’ development can be used as a universal empirical framework (‘a coordinate system’. The analysis allows the authors to conclude that large cities are complex, adaptive systems developing with a high stochastic component and path dependence, which are characterized by multi-industry economical structure and extremely heterogeneous social structure of the population. This objectively requires the use of a system approach to strategic planning and management of such cities’ development

  1. Relationship between bioelectrical impedance analysis and body mass index in adolescent urban Nigerians.

    Science.gov (United States)

    Nwizu, S E; Njokanma, O F; Okoromah, C A; David, N A

    2011-01-01

    Body mass index is often used to assess adiposity but it does not differentiate between fat and non-fat components of body mass. However, body fat composition may be assessed using bioelectrical impedance analysis. The study aimed to relate body mass index to fat in the assessment of overweight and obesity among adolescent Nigerians. Adolescent pupils aged 10 years to 18 years from randomly selected secondary schools in Lagos, Nigeria were studied. Body mass index was calculated while percentage body fat was measured using Tanita body® fat scale model BF 681. Overweight and obesity were defined using age and sex specific criteria for body mass index and for body fat. There were 753 pupils {377(50.1%) males and 376(49.9%) females}. The overall mean values of body mass index for males and females were 18.1±2.72 and 18.9±3.41 (p obesity range had high body fat in comparison to 44.4% of males (p < 0.05). Body mass index is more related to body fat in adolescent females than in their male counterparts.

  2. A Comparative Metroscope Model for Urban Information Flows

    Science.gov (United States)

    Fink, J. H.; Shandas, V.; Beaudoin, F.

    2011-12-01

    One of the most promising ways to achieve global sustainability goals of climate stabilization, poverty reduction, and biodiversity preservation is to make the world's cities more efficient, equitable, and healthful. While each city must follow a unique and somewhat idiosyncratic path toward these linked goals based on its history, geography, demography, and politics, movement in this direction can accelerate if cities can learn from each other more effectively. Such learning requires the identification of common characteristics and methodologies. We have created a framework for organizing and applying urban information flows, which we refer to as "Metroscopes." Metroscopes, which are analogous to the large instruments that have advanced the physical and life sciences, integrate six elements: data collection and input; classification through the use of metrics; data storage and retrieval; analytics and modeling; decision support including visualization and scenario generation; and assessment of the effectiveness of policy choices. Standards for each of these elements can be agreed upon by relevant urban science and policy sub-communities, and then can evolve as technologies and practices advance. We are implementing and calibrating this approach using data and relationships from Portland (OR), Phoenix (AZ) and London (UK). Elements that are being integrated include the Global City Indicators Facility at University of Toronto, the J-Earth database system and Decision Theater from Arizona State University, urban mobility analyses performed by the SENSEable City Lab at MIT, and Portland's Ecodistrict approach for urban management. Individual Metroscopes can be compared directly from one city to another, or with larger assemblages of cities like those being classified by ICLEI's STAR program, the Clinton Climate Initiative's C40, and Siemens Green Cities Index. This large-scale integration of urban data sets and approaches and its systematic comparison are key steps

  3. Combining multimedia models with integrated urban water system models for micropollutants

    DEFF Research Database (Denmark)

    De Keyser, W.; Gevaert, V.; Verdonck, F.

    2010-01-01

    Integrated urban water system (IUWS) modeling aims at assessing the quality of the surface water receiving the urban emissions through sewage treatment plants, combined sewer overflows (CSOS) and stormwater drainage systems However, some micropollutants tend to appear in more than one environment...

  4. Understanding Resilient Urban Futures: A Systemic Modelling Approach

    Directory of Open Access Journals (Sweden)

    Ralph Chapman

    2013-07-01

    Full Text Available The resilience of cities in response to natural disasters and long-term climate change has emerged as a focus of academic and policy attention. In particular, how to understand the interconnectedness of urban and natural systems is a key issue. This paper introduces an urban model that can be used to evaluate city resilience outcomes under different policy scenarios. The model is the Wellington Integrated Land Use-Transport-Environment Model (WILUTE. It considers the city (i.e., Wellington as a complex system characterized by interactions between a variety of internal urban processes (social, economic and physical and the natural environment. It is focused on exploring the dynamic relations between human activities (the geographic distribution of housing and employment, infrastructure layout, traffic flows and energy consumption, environmental effects (carbon emissions, influences on local natural and ecological systems and potential natural disasters (e.g., inundation due to sea level rise and storm events faced under different policy scenarios. The model gives insights that are potentially useful for policy to enhance the city’s resilience, by modelling outcomes, such as the potential for reduction in transportation energy use, and changes in the vulnerability of the city’s housing stock and transport system to sea level rise.

  5. An integrated urban drainage system model for assessing renovation scheme.

    Science.gov (United States)

    Dong, X; Zeng, S; Chen, J; Zhao, D

    2012-01-01

    Due to sustained economic growth in China over the last three decades, urbanization has been on a rapidly expanding track. In recent years, regional industrial relocations were also accelerated across the country from the east coast to the west inland. These changes have led to a large-scale redesign of urban infrastructures, including the drainage system. To help the reconstructed infrastructures towards a better sustainability, a tool is required for assessing the efficiency and environmental performance of different renovation schemes. This paper developed an integrated dynamic modeling tool, which consisted of three models for describing the sewer, the wastewater treatment plant (WWTP) and the receiving water body respectively. Three auxiliary modules were also incorporated to conceptualize the model, calibrate the simulations, and analyze the results. The developed integrated modeling tool was applied to a case study in Shenzhen City, which is one of the most dynamic cities and facing considerable challenges for environmental degradation. The renovation scheme proposed to improve the environmental performance of Shenzhen City's urban drainage system was modeled and evaluated. The simulation results supplied some suggestions for the further improvement of the renovation scheme.

  6. The implementation of biofiltration systems, rainwater tanks and urban irrigation in a single-layer urban canopy model

    Science.gov (United States)

    Demuzere, Matthias; Coutts, Andrew; Goehler, Maren; Broadbent, Ashley; Wouters, Hendrik; van Lipzig, Nicole; Gebert, Luke

    2015-04-01

    Urban vegetation is generally considered as a key tool to modify the urban energy balance through enhanced evapotranspiration (ET). Given that vegetation is most effective when it is healthy, stormwater harvesting and retention strategies (such as water sensitive urban design) could be used to support vegetation and promote ET. This study presents the implementation of a vegetated lined bio-filtration system (BFS) combined with a rainwater tank (RWT) and urban irrigation system in the single-layer urban canopy model Community Land Model-Urban. Runoff from roof and impervious road surface fractions is harvested and used to support an adequate soil moisture level for vegetation in the BFS. In a first stage, modelled soil moisture dynamics are evaluated and found reliable compared to observed soil moisture levels from biofiltration pits in Smith Street, Melbourne (Australia). Secondly, the impact of BFS, RWT and urban irrigation on ET is illustrated for a two-month period in 2012 using varying characteristics for all components. Results indicate that (i) a large amount of stormwater is potentially available for indoor and outdoor water demands, including irrigation of urban vegetation, (ii) ET from the BFS is an order of magnitude larger compared to the contributions from the impervious surfaces, even though the former only covers 10% of the surface fraction and (iii) attention should be paid to the cover fraction and soil texture of the BFS, size of the RWT and the surface fractions contributing to the collection of water in the RWT. Overall, this study reveals that this model development can effectuate future research with state-of-the-art urban climate models to further explore the benefits of vegetated biofiltration systems as a water sensitive urban design tool optimised with an urban irrigation system to maintain healthy vegetation.

  7. An urban runoff model designed to inform stormwater management decisions.

    Science.gov (United States)

    Beck, Nicole G; Conley, Gary; Kanner, Lisa; Mathias, Margaret

    2017-05-15

    We present an urban runoff model designed for stormwater managers to quantify runoff reduction benefits of mitigation actions that has lower input data and user expertise requirements than most commonly used models. The stormwater tool to estimate load reductions (TELR) employs a semi-distributed approach, where landscape characteristics and process representation are spatially-lumped within urban catchments on the order of 100 acres (40 ha). Hydrologic computations use a set of metrics that describe a 30-year rainfall distribution, combined with well-tested algorithms for rainfall-runoff transformation and routing to generate average annual runoff estimates for each catchment. User inputs include the locations and specifications for a range of structural best management practice (BMP) types. The model was tested in a set of urban catchments within the Lake Tahoe Basin of California, USA, where modeled annual flows matched that of the observed flows within 18% relative error for 5 of the 6 catchments and had good regional performance for a suite of performance metrics. Comparisons with continuous simulation models showed an average of 3% difference from TELR predicted runoff for a range of hypothetical urban catchments. The model usually identified the dominant BMP outflow components within 5% relative error of event-based measured flow data and simulated the correct proportionality between outflow components. TELR has been implemented as a web-based platform for use by municipal stormwater managers to inform prioritization, report program benefits and meet regulatory reporting requirements (www.swtelr.com). Copyright © 2017. Published by Elsevier Ltd.

  8. URBAN EFFICIENT ENERGY EVALUATION IN HIGH RESOLUTION URBAN AREAS BY USING ADAPTED WRF-UCM AND MICROSYS CFD MODELS

    Science.gov (United States)

    San Jose, R.; Perez, J. L.; Gonzalez, R. M.

    2009-12-01

    Urban metabolism modeling has advanced substantially during the last years due to the increased detail in mesoscale urban parameterization in meteorological mesoscale models and CFD numerical tools. Recently the implementation of the “urban canopy model” (UCM) into the WRF mesoscale meteorological model has produced a substantial advance on the understanding of the urban atmospheric heat flux exchanges in the urban canopy. The need to optimize the use of heat energy in urban environment has produced a substantial increase in the detailed investigation of the urban heat flux exchanges. In this contribution we will show the performance of using a tool called MICROSYS (MICRO scale CFD modelling SYStem) which is an adaptation of the classical urban canopy model but on a high resolution environment by using a classical CFD approach. The energy balance in the urban system can be determined in a micrometeorologicl sense by considering the energy flows in and out of a control volume. For such a control volume reaching from ground to a certain height above buildings, the energy balance equation includes the net radiation, the anthropogenic heat flux, the turbulent sensible heat flux, the turbulent latent heat flux, the net storage change within the control volume, the net advected flux and other sources and sinks. We have applied the MICROSYS model to an area of 5 km x 5 km with 200 m spatial resolution by using the WRF-UCM (adapted and the MICROSYS CFD model. The anthropogenic heat flux has been estimated by using the Flanner M.G. (2009) database and detailed GIS information (50 m resolution) of Madrid city. The Storage energy has been estimated by calculating the energy balance according to the UCM procedure and implementing it into the MICROSYS tool. Results show that MICROSYS can be used as an energy efficient tool to estimate the energy balance of different urban areas and buildings.

  9. Application of geo-spatial techniques and cellular automata for modelling urban growth of a heterogeneous urban fringe

    Directory of Open Access Journals (Sweden)

    Mahesh Kumar Jat

    2017-12-01

    Full Text Available Urban growth monitoring and assessment are essential for the sustainable natural resources planning & optimum utilization and reducing the risk of problems arising from unplanned urban growth like pollution, urban heat island and ecological disturbances. Cellular Automata (CA based modelling techniques have become popular in recent past for simulating the urban growth. Present study is aimed to evaluate the performance of the CA based SLEUTH model in simulating the urban growth of a complex and relatively more heterogeneous urban area, Ajmer city of Rajasthan (India which is quite different as compared to areas where SLEUTH has been tested in developed countries. Seven multispectral satellite imageries spanning over 21 years have been processed and used for SLEUTH parameterisation. Results of urban growth predicted by SLEUTH has been compared with other methods of land use/land cover extraction. The study has been proved to be successful in giving significant insight into issues contributing uncertainties in forecasting of urban growth of heterogeneous urban areas.

  10. Prevalence of Internet addiction and risk of developing addiction as exemplified by a group of Polish adolescents from urban and rural areas

    Directory of Open Access Journals (Sweden)

    Beata Pawłowska

    2015-02-01

    The Internet addiction criteria were fulfilled by 0.45% of adolescents living in urban areas and 2.9% of those living in rural areas, whereas 35.55% of urban dwelling students and 30.18% of students living in rural areas showed a risk of developing this addiction. More adolescents living in urban areas, compared to those living in rural areas, use Internet pornography, play computer games, disclose their personal data to unknown individuals encountered on the Internet, use Instant Messaging (IM services, electronic mail and Facebook social networking service. Compared to their peers from urban areas, significantly more adolescents from rural areas use ‘Nasza Klasa’ (Our Classmates online social networking service.

  11. Pocket Money: Influence on Body Mass Index and Dental Caries among Urban Adolescents.

    Science.gov (United States)

    Punitha, V C; Amudhan, A; Sivaprakasam, P; Rathnaprabhu, V

    2014-12-01

    To explore the influence of pocket money on Dental Caries and Body Mass Index. A cross-sectional study was conducted wherein urban adolescent schoolchildren of age 13-18(n=916) were selected by two stage random sampling technique. Dental caries was measured using the DMFT Index. The children's nutritional status was assessed by means of anthropometric measurements. Body Mass Index using weight and height of children was evaluated using the reference standard of the WHO 2007. RESULTS showed that 50% of children receive pocket money from parents. The average amount received was Rs. 360/month. There was a significant correlation between age and amount of money received (r=0.160, p=.001). The average amount received by male children was significantly higher (Rs. 400) when compared to female children (Rs. 303). It was observed that income of the family (>30,000 Rs./month) and socioeconomic status (Upper class) was significantly dependent on the amount of money received by children (pmoney or not. When BMI categories and pocket money were considered, statistically significant difference was seen among overweight and obese and normal weight children (pmoney from parents could influence their eating habits in turn affect general health. Parents and teachers should motivate children on healthy spending of their pocket money.

  12. Associations among Depressive Symptoms, Dating Violence, and Relationship Power in Urban, Adolescent Girls

    Science.gov (United States)

    Volpe, Ellen M.; Hardie, Thomas L.; Cerulli, Catherine

    2013-01-01

    Objective To explore the associations among dating violence (DV), aggression, relationship power, and depressive symptoms. Design A cross-sectional survey secondary analysis. Setting An urban, school based health center, October, 2009 through May, 2009. Participants Low income, adolescent girls (n= 155), ages 14–18. Methods Descriptive and bivariate analyses were conducted to illustrate patterns and associations among variables. Key variables included depressive symptoms, DV victimization and aggression, and relationship power. We used mediation analyses to determine the direct and indirect effects among variables. Results Both DV victimization and aggression were reported frequently. Furthermore, DV victimization had a significant direct effect on depression and an indirect effect through relationship power. Depressive symptoms and relationship power were associated with DV aggression. Although relationship power did have a significant inverse effect on depressive symptoms, it was not through DV aggression. Conclusions Complex associations remain between mental health and DV; however, relationship power partially accounts for DV victimization's effect on depressive symptoms. Depressive symptoms are associated with DV victimization and aggression; therefore, nurses should address relationship power in clinical and community interventions. PMID:22697267

  13. Integrated city as a model for a new wave urban tourism

    Science.gov (United States)

    Ariani, V.

    2018-03-01

    Cities are a major player for an urban tourism destination. Massive tourism movement for urban tourism gains competitiveness to the city with similar characteristic. The new framework model for new wave urban tourism is crucial to give more experience to the tourist and valuing for the city itself. The integrated city is the answer for creating a new model for an urban tourism destination. The purpose of this preliminary research is to define integrated city framework for urban tourism development. It provides a rationale for tourism planner pursuing an innovative approach, competitive advantages, and general urban tourism destination model. The methodology applies to this research includes desk survey, literature review and focus group discussion. A conceptual framework is proposed, discussed and exemplified. The framework model adopts a place-based approach to tourism destination and suggests an integrated city model for urban tourism development. This model is a tool for strategy making in re-invention integrated city as an urban tourism destination.

  14. Modeling carbon emissions from urban traffic system using mobile monitoring.

    Science.gov (United States)

    Sun, Daniel Jian; Zhang, Ying; Xue, Rui; Zhang, Yi

    2017-12-01

    Comprehensive analyses of urban traffic carbon emissions are critical in achieving low-carbon transportation. This paper started from the architecture design of a carbon emission mobile monitoring system using multiple sets of equipment and collected the corresponding data about traffic flow, meteorological conditions, vehicular carbon emissions and driving characteristics on typical roads in Shanghai and Wuxi, Jiangsu province. Based on these data, the emission model MOVES was calibrated and used with various sensitivity and correlation evaluation indices to analyze the traffic carbon emissions at microscopic, mesoscopic and macroscopic levels, respectively. The major factors that influence urban traffic carbon emissions were investigated, so that emission factors of CO, CO 2 and HC were calculated by taking representative passenger cars as a case study. As a result, the urban traffic carbon emissions were assessed quantitatively, and the total amounts of CO, CO 2 and HC emission from passenger cars in Shanghai were estimated as 76.95kt, 8271.91kt, and 2.13kt, respectively. Arterial roads were found as the primary line source, accounting for 50.49% carbon emissions. In additional to the overall major factors identified, the mobile monitoring system and carbon emission quantification method proposed in this study are of rather guiding significance for the further urban low-carbon transportation development. Copyright © 2017 Elsevier B.V. All rights reserved.

  15. A study on knowledge and practices regarding menstrual hygiene among rural and urban adolescent girls in Udupi Taluk, Manipal, India

    Directory of Open Access Journals (Sweden)

    Kamath R

    2013-09-01

    Full Text Available Background Adolescent girls often lack knowledge regarding reproductive health including menstruation hygiene which can be due to socio-cultural barriers in which they grow up. Objectives: To explore the knowledge, practices and sources of information regarding menstruation and hygiene among adolescent girls in Udupi taluk, India. Methods: An epidemiologic study was undertaken using cross-sectional study method among 550 school-going adolescent girls aged13-16 years. A total of 270 were from urban and 280 from the rural area. Stratified cluster sampling was adopted to select the schools and simple random sampling technique to select the participants. Data was collected using a pre-tested questionnaire and analyzed using SPSS version 15.Results Around 34% participants were aware about menstruation prior to menarche, and mothers were the main source of information among both groups. Overall, 70.4% of adolescent girls were using sanitary napkins as menstrual absorbent, while 25.6% were using both cloth and sanitary napkins. Almost half of the rural participants dried the absorbent inside their homes. Conclusions: There is a need to equip the adolescent girls with knowledge regarding safe, hygienic practices to enable them to lead a healthy reproductive life.

  16. What's age got to do with it? Partner age difference, power, intimate partner violence, and sexual risk in urban adolescents.

    Science.gov (United States)

    Volpe, Ellen M; Hardie, Thomas L; Cerulli, Catherine; Sommers, Marilyn S; Morrison-Beedy, Dianne

    2013-07-01

    Adolescent girls with older male main partners are at greater risk for adverse sexual health outcomes than other adolescent girls. One explanation for this finding is that low relationship power occurs with partner age difference. Using a cross-sectional, descriptive design, we investigated the effect of partner age difference between an adolescent girl and her male partner on sexual risk behavior through the mediators of sexual relationship power, and physical intimate partner violence (IPV), and psychological IPV severity. We chose Blanc's framework to guide this study as it depicts the links among demographic, social, economic, relationship, family and community characteristics, and reproductive health outcomes with gender-based relationship power and violence. Urban adolescent girls (N = 155) completed an anonymous computer-assisted self-interview survey to examine partner and relationship factors' effect on consistent condom use. Our sample had an average age of 16.1 years with a mean partner age of 17.8 years. Partners were predominantly African American (75%), non-Hispanic (74%), and low-income (81%); 24% of participants reported consistent condom use in the last 3 months. Descriptive, correlation, and multiple mediation analyses were conducted. Partner age difference was negatively associated with consistent condom use (-.4292, p sexual risk factors within adolescent sexual relationships. Nonetheless, for clinicians and researchers, these findings underscore the heightened risk associated with partner age differences and impact of relationship dynamics on sexual risk behavior.

  17. Competing Factor Models of Child and Adolescent Psychopathology.

    Science.gov (United States)

    Doyle, Mark M; Murphy, Jamie; Shevlin, Mark

    2016-11-01

    Co-occurring psychological disorders are highly prevalent among children and adolescents. To date, the most widely utilised factor model used to explain this co-occurrence is the two factor model of internalising and externalising (Achenbach 1966). Several competing models of general psychopathology have since been reported as alternatives, including a recent three factor model of Distress, Fear and Externalising Dimensions (Krueger 1999). Evidence for the three factor model suggests there are advantages to utilising a more complex model. Using the British Child and Adolescent Mental Health Survey 2004 data (B-CAMHS; N = 7997), confirmatory factor analysis was used to test competing factor structure models of child and adolescent psychopathology. The B-CAMHS was an epidemiological survey of children between the ages of 5 and 16 in Great Britain. Child psychological disorders were assessed using the Strength and Difficulties Questionnaire (Goodman 1997), and the Development and Wellbeing Assessment (Goodman et al. 2000). A range of covariates and risk variables including trauma, parent mental health and family functioning where subsequently utilised within a MIMIC model framework to predict each dimension of the 2 and three factor structure models. Two models demonstrated acceptable fit. The first complimented Achenbach's Internalising and Externalising structure. The three factor model was found to have highly comparable fit indices to the two factor model. The second order models did not accurately represent the data nor did an alternative three factor model of Internalising, Externalising and ADHD. The two factor and three factor MIMIC models observed unique profiles of risk for each dimension. The findings suggest that child and adolescent psychopathology may also be accurately conceptualised in terms of distress, fear and externalising dimensions. The MIMIC models demonstrated that the Distress and Fear dimensions have their own unique etiological profile of

  18. BMI, Body Image, Emotional Well-Being and Weight-Control Behaviors in Urban African American Adolescents.

    Science.gov (United States)

    Allen, Delenya; Belcher, Harolyn M E; Young, Allen; Gibson, Lillian Williams; Colantuoni, Elizabeth; Trent, Maria

    While urban African American adolescents face significant health disparities associated with overweight and obesity that follow them into adulthood; there is limited data on body image, emotional well-being, and weight control behaviors in this population to design effective public health interventions. This study was designed to understand the association of weight status to adolescent weight control, body image, and emotional well-being responses, in African American high school students. The study cohort consisted of 776 students, mean age 15.8 years (±1.2). Data from Guidelines for Adolescent Preventive Services (GAPS) student surveys and anthropometric studies were collected at School-Based Health Centers. Associations between adolescent responses on the GAPS and body mass index (BMI) status (healthy weight: 5th to less than 85th percentile, overweight: 85th to less than 95th percentile, obese: 95th percentile or greater) were estimated using logistic regression and dose- response plots. There were statistically significant associations between BMI category and weight control (ranging from a mean 5.18 to 7.68 odds of obesity) and body image (3.40 to 13.26 odds of obesity) responses. Responses to weight control and body image questions exhibited a dose-response for odds of overweight and obesity. Feelings of depressed mood were associated with obesity (1.47 times the odds of obesity compared to students who did not endorse depressed mood; 95% CI, 1.01 to 2.13) but not overweight status. Overweight and obese urban African American adolescents are more likely to screen positively on weight control risk behaviors and negative body image questions than their normal weight peers. The weight control and body image measures on the GAPS may provide information to identify youth in need of services and those motivated for brief school-based weight control interventions.

  19. Developmental Cascade Model for Adolescent Substance Use From Infancy to Late Adolescence

    Science.gov (United States)

    Eiden, Rina D.; Lessard, Jared; Colder, Craig R.; Livingston, Jennifer; Casey, Meghan; Leonard, Kenneth E.

    2016-01-01

    A developmental cascade model for adolescent substance use beginning in infancy was examined in a sample of children with alcoholic and non-alcoholic parents. The model examined the role of parents’ alcohol diagnoses, depression and antisocial behavior in a cascading process of risk via three major hypothesized pathways: first via parental warmth/sensitivity from toddler to kindergarten age predicting higher parental monitoring in middle childhood through early adolescence serving as a protective pathway for adolescent substance use; second, via child low self-regulation in the preschool years to a continuing externalizing behavior problem pathway leading to underage drinking and higher engagement with substance using peers; and third, via higher social competence from kindergarten age through middle childhood being protective against engagement with delinquent and substance using peers, and leading to lower adolescent substance use. The sample consisted of 227 intact families recruited from the community at 12 months of child age. Results were supportive for the first two pathways to substance use in late adolescence. Among proximal, early adolescent risks, engagement with delinquent peers and parent’s acceptance of underage drinking were significant predictors of late adolescent alcohol and marijuana use. The results highlight the important protective roles of maternal warmth/sensitivity in early childhood to kindergarten age, parental monitoring in middle childhood, and of child self-regulation in the preschool period as reducing risk for externalizing behavior problems, underage drinking, and engagement with delinquent peers in early adolescence. Specific implications for the creation of developmentally fine-tuned preventive intervention are discussed. PMID:27584669

  20. Combining multimedia models with integrated urban water system models for micropollutants

    DEFF Research Database (Denmark)

    De Keyser, W.; Gevaert, V.; Verdonck, F.

    2009-01-01

    and a stormwater infiltration pond scenario, as an example of a sustainable urban drainage system (SUDS). A case for Bis(2-ethylhexyl) phthalate (DEHP) was simulated and resulted in a reduced surface water concentration for the latter scenario. However, the model also showed that this was at the expense......Integrated urban water system (IUWS) modelling aims at assessing the quality of the surface water receiving the urban emissions through sewage treatment plants, combined sewer overflows (CSOs) and stormwater drainage systems. However, some micropollutants have the tendency to occur in more than one...

  1. Enhancing photogrammetric 3d city models with procedural modeling techniques for urban planning support

    International Nuclear Information System (INIS)

    Schubiger-Banz, S; Arisona, S M; Zhong, C

    2014-01-01

    This paper presents a workflow to increase the level of detail of reality-based 3D urban models. It combines the established workflows from photogrammetry and procedural modeling in order to exploit distinct advantages of both approaches. The combination has advantages over purely automatic acquisition in terms of visual quality, accuracy and model semantics. Compared to manual modeling, procedural techniques can be much more time effective while maintaining the qualitative properties of the modeled environment. In addition, our method includes processes for procedurally adding additional features such as road and rail networks. The resulting models meet the increasing needs in urban environments for planning, inventory, and analysis

  2. Montepulciano 3D virtual models for urban planning and development of the urban environment

    Directory of Open Access Journals (Sweden)

    Stefano Bertocci

    2014-05-01

    Full Text Available The research work carried out by the Department of Architecture of Florence and the Department of Civil Engineering and Architecture of Pavia for the administration of Montepulciano (SI was aimed to study new methods of analysis and promotion of the city. The representation of the street fronts of the historic center, realized in a decade of analysis in which it is carried out the study for the planning, has formed a corpus of documents useful for the realization of a three-dimensional model of the city itself. The model, which allows a dynamic interaction with the urban structure, has been designed to develop tools for valuation of the activities and the historical and cultural heritage. It is possible through the determination of a structure of a visual interface and interactive multimedia which would transform the model in a real emotional space.

  3. Excellent approach to modeling urban expansion by fuzzy cellular automata: agent base model

    Science.gov (United States)

    Khajavigodellou, Yousef; Alesheikh, Ali A.; Mohammed, Abdulrazak A. S.; Chapi, Kamran

    2014-09-01

    Recently, the interaction between humans and their environment is the one of important challenges in the world. Landuse/ cover change (LUCC) is a complex process that includes actors and factors at different social and spatial levels. The complexity and dynamics of urban systems make the applicable practice of urban modeling very difficult. With the increased computational power and the greater availability of spatial data, micro-simulation such as the agent based and cellular automata simulation methods, has been developed by geographers, planners, and scholars, and it has shown great potential for representing and simulating the complexity of the dynamic processes involved in urban growth and land use change. This paper presents Fuzzy Cellular Automata in Geospatial Information System and remote Sensing to simulated and predicted urban expansion pattern. These FCA-based dynamic spatial urban models provide an improved ability to forecast and assess future urban growth and to create planning scenarios, allowing us to explore the potential impacts of simulations that correspond to urban planning and management policies. A fuzzy inference guided cellular automata approach. Semantic or linguistic knowledge on Land use change is expressed as fuzzy rules, based on which fuzzy inference is applied to determine the urban development potential for each pixel. The model integrates an ABM (agent-based model) and FCA (Fuzzy Cellular Automata) to investigate a complex decision-making process and future urban dynamic processes. Based on this model rapid development and green land protection under the influences of the behaviors and decision modes of regional authority agents, real estate developer agents, resident agents and non- resident agents and their interactions have been applied to predict the future development patterns of the Erbil metropolitan region.

  4. Developmental Cascade Model for Adolescent Substance Use from Infancy to Late Adolescence

    Science.gov (United States)

    Eiden, Rina D.; Lessard, Jared; Colder, Craig R.; Livingston, Jennifer; Casey, Meghan; Leonard, Kenneth E.

    2016-01-01

    A developmental cascade model for adolescent substance use beginning in infancy was examined in a sample of children with alcoholic and nonalcoholic parents. The model examined the role of parents' alcohol diagnoses, depression and antisocial behavior in a cascading process of risk via 3 major hypothesized pathways: first, via parental…

  5. A modeling study of the impact of urban trees on ozone

    Science.gov (United States)

    David J. Nowak; Kevin L. Civerolo; S. Trivikrama Rao; Gopal Sistla; Christopher J. Luley; Daniel E. Crane

    2000-01-01

    Modeling the effects of increased urban tree cover on ozone concentrations (July 13-15, 1995) from Washington, DC, to central Massachusetts reveals that urban trees generally reduce ozone concentrations in cities, but tend to increase average ozone concentrations in the overall modeling domain. During the daytime, average ozone reductions in urban areas (1 ppb) were...

  6. Four Mechanistic Models of Peer Influence on Adolescent Cannabis Use.

    Science.gov (United States)

    Caouette, Justin D; Feldstein Ewing, Sarah W

    2017-06-01

    Most adolescents begin exploring cannabis in peer contexts, but the neural mechanisms that underlie peer influence on adolescent cannabis use are still unknown. This theoretical overview elucidates the intersecting roles of neural function and peer factors in cannabis use in adolescents. Novel paradigms using functional magnetic resonance imaging (fMRI) in adolescents have identified distinct neural mechanisms of risk decision-making and incentive processing in peer contexts, centered on reward-motivation and affect regulatory neural networks; these findings inform a theoretical model of peer-driven cannabis use decisions in adolescents. We propose four "mechanistic profiles" of social facilitation of cannabis use in adolescents: (1) peer influence as the primary driver of use; (2) cannabis exploration as the primary driver, which may be enhanced in peer contexts; (3) social anxiety; and (4) negative peer experiences. Identification of "neural targets" involved in motivating cannabis use may inform clinicians about which treatment strategies work best in adolescents with cannabis use problems, and via which social and neurocognitive processes.

  7. SOCIO-DEMOGRAPHIC CORRELATES OF OVERWEIGHT AND OBESITY AMONG ADOLESCENTS OF AN URBAN AREA OF DELHI, INDIA

    Directory of Open Access Journals (Sweden)

    Rajesh Gupta

    2013-12-01

    Full Text Available Introduction: The problem of overweight and obesity is not confined only to developed countries. It may lead to adverse metabolic changes and increased risk of non communicable diseases. Most studies conducted in India are school based. The present community based study was undertaken to assess the prevalence of overweight and obesity and its sociodemographic correlates among adolescents of an urban area of Delhi.Material and Methods: A cross-sectional, community based study, using systematic random sampling was carried out during 2011 on 811 adolescents of both sexes from an urban area in South-West Delhi. A pre-designed and pre-tested proforma was used to collect information on socio-demographic and anthropometric variables. Subjects were classified as overweight or obese on the basis of NCHS/CDC 2000 Age and Sex Specific Percentile Growth Charts.Results: Prevalence of overweight and obesity was 15.1% and 7.2% respectively. When analyzed by gender, prevalence of overweight and obesity was 17.4% and 7.7% among boys and 12.4% and 6.7% among girls respectively. Logistic regression analysis revealed that prevalence was significantly higher among subjects studying in private schools (OR: 2.56; CI: 1.77 – 3.71Conclusion: Overnutrition is an emerging health problem in adolescent population which needs to be addressed with priority.

  8. Urban-rural differences in adolescent self-esteem, leisure boredom, and sensation-seeking as predictors of leisure-time usage and satisfaction.

    Science.gov (United States)

    Gordon, W R; Caltabiano, M L

    1996-01-01

    Australia's "sporting nation" image has been challenged by adolescents' decreasing involvement in active leisure pursuits. A significant number of adolescents experience leisure boredom and dissatisfaction, which have been implicated in drug use and delinquency. Researchers have largely ignored the multivariate nature of adolescent leisure experiences. This North Queensland, Australian adolescent leisure study explored the extent to which adolescent leisure experiences were mediated by individual and situational variables. Seventy-five Cairns and 65 Atherton high school students (66 males and 74 females) were surveyed from grades 8, 10, and 12 (ages 12 to 19), during normal class periods. The Self-Rating Scale (SPS) measure of self-esteem, Sensation-Seeking Scale Form II (SSS), Leisure Boredom Scale (LBS), and a time-use inventory yielded quantitative data. Urban adolescents reported less leisure satisfaction. Participation was highest for passive leisure and lowest for active leisure. Urban adolescents reported higher social leisure, while rural adolescents engaged in more passive leisure. For both Cairns and Atherton, the heaviest substance users were those who scored low on self-esteem and high on sensation-seeking. Atherton adolescents who scored low on self-esteem but high on sensation-seeking, reported the most crime involvement. Methodological issues and implications are discussed and suggestions made for future research.

  9. Complexity and agent-based modelling in urban research

    DEFF Research Database (Denmark)

    Fertner, Christian

    Urbanisation processes are results of a broad variety of actors or actor groups and their behaviour and decisions based on different experiences, knowledge, resources, values etc. The decisions done are often on a micro/individual level but resulting in macro/collective behaviour. In urban research...... influence on the bigger system. Traditional scientific methods or theories often tried to simplify, not accounting complex relations of actors and decision-making. The introduction of computers in simulation made new approaches in modelling, as for example agent-based modelling (ABM), possible, dealing...... is (still) seen very critical regarding its usefulness and explanatory power....

  10. Adolescent Pornography Use and Dating Violence among a Sample of Primarily Black and Hispanic, Urban-Residing, Underage Youth

    Directory of Open Access Journals (Sweden)

    Emily F. Rothman

    2015-12-01

    Full Text Available This cross-sectional study was designed to characterize the pornography viewing preferences of a sample of U.S.-based, urban-residing, economically disadvantaged, primarily Black and Hispanic youth (n = 72, and to assess whether pornography use was associated with experiences of adolescent dating abuse (ADA victimization. The sample was recruited from a large, urban, safety net hospital, and participants were 53% female, 59% Black, 19% Hispanic, 14% Other race, 6% White, and 1% Native American. All were 16–17 years old. More than half (51% had been asked to watch pornography together by a dating or sexual partner, and 44% had been asked to do something sexual that a partner saw in pornography. Adolescent dating abuse (ADA victimization was associated with more frequent pornography use, viewing pornography in the company of others, being asked to perform a sexual act that a partner first saw in pornography, and watching pornography during or after marijuana use. Approximately 50% of ADA victims and 32% of non-victims reported that they had been asked to do a sexual act that their partner saw in pornography (p = 0.15, and 58% did not feel happy to have been asked. Results suggest that weekly pornography use among underage, urban-residing youth is common, and may be associated with ADA victimization.

  11. Adolescent Pornography Use and Dating Violence among a Sample of Primarily Black and Hispanic, Urban-Residing, Underage Youth

    Science.gov (United States)

    Rothman, Emily F.; Adhia, Avanti

    2015-01-01

    This cross-sectional study was designed to characterize the pornography viewing preferences of a sample of U.S.-based, urban-residing, economically disadvantaged, primarily Black and Hispanic youth (n = 72), and to assess whether pornography use was associated with experiences of adolescent dating abuse (ADA) victimization. The sample was recruited from a large, urban, safety net hospital, and participants were 53% female, 59% Black, 19% Hispanic, 14% Other race, 6% White, and 1% Native American. All were 16–17 years old. More than half (51%) had been asked to watch pornography together by a dating or sexual partner, and 44% had been asked to do something sexual that a partner saw in pornography. Adolescent dating abuse (ADA) victimization was associated with more frequent pornography use, viewing pornography in the company of others, being asked to perform a sexual act that a partner first saw in pornography, and watching pornography during or after marijuana use. Approximately 50% of ADA victims and 32% of non-victims reported that they had been asked to do a sexual act that their partner saw in pornography (p = 0.15), and 58% did not feel happy to have been asked. Results suggest that weekly pornography use among underage, urban-residing youth may be common, and may be associated with ADA victimization. PMID:26703744

  12. Prevalence of Internet addiction and risk of developing addiction as exemplified by a group of Polish adolescents from urban and rural areas

    Directory of Open Access Journals (Sweden)

    Beata Pawłowska

    2015-02-01

    Full Text Available [b]Objective. [/b]The objective of the study was to determine the prevalence of Internet addiction and the risk of developing this addiction in Polish adolescents attending junior high schools and high school in Lublin Province, to indicate the differences regarding the intensity of Internet addiction symptoms, and the types of online activity of adolescents residing in urban and rural areas. [b]Material and Methods[/b]. The examined group comprised 1,860 participants (1,320 girls and 540 boys with an average age of 17 years. 760 students lived in urban areas and 1,100 lived in rural areas. The following were used in the study: the Socio-demographic Questionnaire designed by the authors, the Internet Addiction Questionnaire designed by Potembska, the Internet Addiction Test by Young and the Internet Addiction Questionnaire (Kwestionariusz do Badania Uzależnienia od Internetu – KBUI designed by Pawłowska and Potembska. [b]Results[/b]. The adolescents living in urban areas showed a significantly greater intensity of Internet and computer addiction symptoms measured by the KBUI Questionnaire, compared to those living in rural areas. [b]Conclusions.[/b] The Internet addiction criteria were fulfilled by 0.45% of adolescents living in urban areas and 2.9% of those living in rural areas, whereas 35.55% of urban dwelling students and 30.18% of students living in rural areas showed a risk of developing this addiction. More adolescents living in urban areas, compared to those living in rural areas, use Internet pornography, play computer games, disclose their personal data to unknown individuals encountered on the Internet, use Instant Messaging (IM services, electronic mail and Facebook social networking service. Compared to their peers from urban areas, significantly more adolescents from rural areas use ‘Nasza Klasa’ (Our Classmates online social networking service.

  13. Prevalence of Internet addiction and risk of developing addiction as exemplified by a group of Polish adolescents from urban and rural areas.

    Science.gov (United States)

    Pawłowska, Beata; Zygo, Maciej; Potembska, Emilia; Kapka-Skrzypczak, Lucyna; Dreher, Piotr; Kędzierski, Zbigniew

    2015-01-01

    The objective of the study was to determine the prevalence of Internet addiction and the risk of developing this addiction in Polish adolescents attending junior high schools and high school in Lublin Province, to indicate the differences regarding the intensity of Internet addiction symptoms, and the types of online activity of adolescents residing in urban and rural areas. The examined group comprised 1,860 participants (1,320 girls and 540 boys) with an average age of 17 years. 760 students lived in urban areas and 1,100 lived in rural areas. The following were used in the study: the Socio-demographic Questionnaire designed by the authors, the Internet Addiction Questionnaire designed by Potembska, the Internet Addiction Test by Young and the Internet Addiction Questionnaire (Kwestionariusz do Badania Uzależnienia od Internetu - KBUI) designed by Pawłowska and Potembska. The adolescents living in urban areas showed a significantly greater intensity of Internet and computer addiction symptoms measured by the KBUI Questionnaire, compared to those living in rural areas. The Internet addiction criteria were fulfilled by 0.45% of adolescents living in urban areas and 2.9% of those living in rural areas, whereas 35.55% of urban dwelling students and 30.18% of students living in rural areas showed a risk of developing this addiction. More adolescents living in urban areas, compared to those living in rural areas, use Internet pornography, play computer games, disclose their personal data to unknown individuals encountered on the Internet, use Instant Messaging (IM) services, electronic mail and Facebook social networking service. Compared to their peers from urban areas, significantly more adolescents from rural areas use 'Nasza Klasa' (Our Classmates) online social networking service.

  14. Home, School, and Community in Adolescent Education. ERIC/CUE Urban Diversity Series No. 84.

    Science.gov (United States)

    Ianni, Francis A. J.

    Current research on adolescence provides plenty of facts about delinquency, unemployment, and illegitimacy, yet tells us little or nothing about the inner life of adolescents. In an attempt to provide more information, the research reported on here describes the "periods" of adolescence as they are structured in the various…

  15. A Simulation Model for Intra-Urban Movements.

    Directory of Open Access Journals (Sweden)

    Nimrod Serok

    Full Text Available Human mobility patterns (HMP have become of interest to a variety of disciplines. The increasing availability of empirical data enables researchers to analyze patterns of people's movements. Recent work suggested that HMP follow a Levy-flight distribution and present regularity. Here, we present an innovative agent-based model that simulates HMP for various purposes. It is based on the combination of regular movements with spatial considerations, represented by an expanded gravitation model. The agents in this model have different attributes that affect their choice of destination and the duration they stay in each location. Thus, their movement mimics real-life situations. This is a stochastic, bottom-up model, yet it yields HMP that qualitatively fit HMP empirical data in terms of individuals, as well as the entire population. Our results also correspond to real-life phenomena in terms of urban spatial dynamics, that is, the emergence of popular locations in the city due to bottom-up behavior of people. Our model is novel in being based on the assumption that HMP are space-dependent as well as follow high regularity. To our knowledge, we are the first to succeed in simulating HMP not only at the inter-city scale but also at the intra-urban one.

  16. Metric Evaluation Pipeline for 3d Modeling of Urban Scenes

    Science.gov (United States)

    Bosch, M.; Leichtman, A.; Chilcott, D.; Goldberg, H.; Brown, M.

    2017-05-01

    Publicly available benchmark data and metric evaluation approaches have been instrumental in enabling research to advance state of the art methods for remote sensing applications in urban 3D modeling. Most publicly available benchmark datasets have consisted of high resolution airborne imagery and lidar suitable for 3D modeling on a relatively modest scale. To enable research in larger scale 3D mapping, we have recently released a public benchmark dataset with multi-view commercial satellite imagery and metrics to compare 3D point clouds with lidar ground truth. We now define a more complete metric evaluation pipeline developed as publicly available open source software to assess semantically labeled 3D models of complex urban scenes derived from multi-view commercial satellite imagery. Evaluation metrics in our pipeline include horizontal and vertical accuracy and completeness, volumetric completeness and correctness, perceptual quality, and model simplicity. Sources of ground truth include airborne lidar and overhead imagery, and we demonstrate a semi-automated process for producing accurate ground truth shape files to characterize building footprints. We validate our current metric evaluation pipeline using 3D models produced using open source multi-view stereo methods. Data and software is made publicly available to enable further research and planned benchmarking activities.

  17. METRIC EVALUATION PIPELINE FOR 3D MODELING OF URBAN SCENES

    Directory of Open Access Journals (Sweden)

    M. Bosch

    2017-05-01

    Full Text Available Publicly available benchmark data and metric evaluation approaches have been instrumental in enabling research to advance state of the art methods for remote sensing applications in urban 3D modeling. Most publicly available benchmark datasets have consisted of high resolution airborne imagery and lidar suitable for 3D modeling on a relatively modest scale. To enable research in larger scale 3D mapping, we have recently released a public benchmark dataset with multi-view commercial satellite imagery and metrics to compare 3D point clouds with lidar ground truth. We now define a more complete metric evaluation pipeline developed as publicly available open source software to assess semantically labeled 3D models of complex urban scenes derived from multi-view commercial satellite imagery. Evaluation metrics in our pipeline include horizontal and vertical accuracy and completeness, volumetric completeness and correctness, perceptual quality, and model simplicity. Sources of ground truth include airborne lidar and overhead imagery, and we demonstrate a semi-automated process for producing accurate ground truth shape files to characterize building footprints. We validate our current metric evaluation pipeline using 3D models produced using open source multi-view stereo methods. Data and software is made publicly available to enable further research and planned benchmarking activities.

  18. Prevalence and correlates of condom use at last sexual intercourse among in-school adolescents in urban areas of Uganda.

    Science.gov (United States)

    Twa-Twa, J M; Oketcho, S; Siziya, S; Muula, A S

    2008-04-01

    Correct and consistent condom use remains an important public health intervention against the spread of Human Immunodeficiency Virus and other sexually transmitted infections. There is paucity of information on sexual behaviour of in-school adolescents in Uganda. We, therefore, used secondary data of the Uganda Global School-based Health Survey (UGSHS) conducted in 2003 to determine the prevalence and correlates of condom use at last sexual intercourse in urban areas of Uganda. A two-stage cluster sampling technique was used to obtain a representative sample. Altogether 1709 students participated in the survey in urban areas of whom 179 (14.9% of males, and 7.9% of females) had sexual intercourse within 12 months before the survey. Overall 77.3% (79.7% of male, and 72.3% of female) adolescents used a condom at last sexual intercourse. Adolescents who drank alcohol and used drugs were 64% (OR = 1.64, 95% CI 1.54, 1.75) and 68%, (OR = 1.68, 95% CI 1.56, 1.81) more likely to have used a condom, respectively. Meanwhile, adolescents who ever got drunk, and who reported to ever had 2 or more sex partners were 55% (OR = 0.45, 95% CI 0.42, 0.48) and 35% (OR = 0.65, 95% CI 0.62, 0.68) less likely to have used a condom compared to those who had never got drunk, and who ever had 1 sex partner, respectively. Finally, adolescents who reported receiving no parental supervision were 45% (OR = 0.55, 95% CI 0.53, 0.58) less likely to have used a condom compared to those who reported receiving parental supervision. Parental supervision may be effective in promoting condom use among adolescents. Furthermore, drinking alcohol was associated with condom use probably due to peer pressure and easy access of condoms in drinking places as condoms are not actively promoted in schools. There is need for further research on how in-school adolescents could access condoms.

  19. Key Parameters for Urban Heat Island Assessment in A Mediterranean Context: A Sensitivity Analysis Using the Urban Weather Generator Model

    Science.gov (United States)

    Salvati, Agnese; Palme, Massimo; Inostroza, Luis

    2017-10-01

    Although Urban Heat Island (UHI) is a fundamental effect modifying the urban climate, being widely studied, the relative weight of the parameters involved in its generation is still not clear. This paper investigates the hierarchy of importance of eight parameters responsible for UHI intensity in the Mediterranean context. Sensitivity analyses have been carried out using the Urban Weather Generator model, considering the range of variability of: 1) city radius, 2) urban morphology, 3) tree coverage, 4) anthropogenic heat from vehicles, 5) building’s cooling set point, 6) heat released to canyon from HVAC systems, 7) wall construction properties and 8) albedo of vertical and horizontal surfaces. Results show a clear hierarchy of significance among the considered parameters; the urban morphology is the most important variable, causing a relative change up to 120% of the annual average UHI intensity in the Mediterranean context. The impact of anthropogenic sources of heat such as cooling systems and vehicles is also significant. These results suggest that urban morphology parameters can be used as descriptors of the climatic performance of different urban areas, easing the work of urban planners and designers in understanding a complex physical phenomenon, such as the UHI.

  20. [Parental stance towards alcohol consumption in 12- to 17-year-old adolescents from six urban areas in Spain].

    Science.gov (United States)

    March Cerdá, Joan Carles; Prieto Rodríguez, María Angeles; Danet, Alina; Ruiz Azarola, Ainhoa; García Toyos, Noelia; Ruiz Román, Paloma

    2010-01-01

    To determine the opinions of urban parents on alcohol drinking in teenagers and their positioning regarding the legal restrictive measures. We performed a qualitative study of six focal groups including 42 mothers and fathers of adolescents from six different Spanish regions and from diverse social strata. The quantitative part of the study consisted of a 1-10 scale questionnaire, measuring parents' acceptance and opinion about legal measures restricting underage drinking. Means and standard deviation were calculated. Parents did not consider adolescent alcohol drinking to be a problem so long as it was moderate and leisure time-related. The social and cultural context was permissive with the alcohol consumption. Alcohol intake depended on both external (social pressure) and internal (family) factors. Fathers' preferred to exercise authority, while mothers preferred communication and education skills. Parents approved of teachers' interventions, especially when based on the student's overall education and not restricted to knowledge transmission. Public institutions and authorities were held responsible for adolescents' lack of information, the scarcity of leisure-time alternatives and for not ensuring compliance with current regulations. Parents approved restrictions regarding the sale and advertising of alcohol. Parents recognize adolescent alcohol drinking as a problem and tend to deal with it. Parents use distinct intervention strategies and generally approve legal measures. Copyright 2008 SESPAS. Published by Elsevier Espana. All rights reserved.

  1. Socio-economic status as an environmental factor - incidence of underweight, overweight and obesity in adolescents from less-urbanized regions of Poland.

    Science.gov (United States)

    Długosz, Anna; Niedźwiedzka, Ewa; Długosz, Tomasz; Wądołowska, Lidia

    2015-01-01

    Under-nutrition, over-nutrition and obesity incidence in relation to environmental diversity and socio-economic influences in adolescents from less urbanized regions of Poland has not been widely studied. To determine the correlation between socio-economic status and incidence of underweight, overweight and obesity in adolescents located in less-urbanized regions of Poland. The study involved 553 adolescents aged 13-18 living in 2 less-urbanized regions of Poland (small towns and villages in the central and north-eastern regions). The sample was randomly chosen. The distinguishing determinants of socio-economic status (SES) included 6 features. The SES index (SESI) was calculated. Low, average and high SESI adolescents were distinguished. Using logistic regression, the odds ratio (OR) of underweight (BMIobesity (BMI ≥ 30 kg/m(2)) incidence was calculated after BMI conversion using the international cut-off by Cole et al. (2000, 2007). The reference group were adolescents with low SESI (OR=1.00). 11% of the adolescents were underweight, 14% were overweight and 3% were obese. The odds ratio of underweight incidence for the average SESI adolescent was 0.33 (95%CI: 0.15, 0.73; padolescents - 1.05 (95%CI: 0.78, 1.42; p>0.05). The odds ratio of overweight incidence in the average SESI adolescent was 1.73 (95%CI: 0.93, 3.19; p>0.05) and in high SESI adolescents - 1.14 (95%CI: 0.83, 1.57; p>0.05). The odds ratio of obesity incidence in the average SESI adolescent was 0.70 (95%CI: 0.21, 2.34; p>0.05) and in high SESI adolescents - 0.76 (95%CI: 0.40, 1.44; p>0.05). Adjustments for gender, age or region of residence did not significantly change the ORs values or their interpretation. Underweight incidence in adolescents from less urbanized regions of Poland depended on socio-economic status. An adolescent with average socio-economic status was 3 times less likely to be underweight than an adolescent with low socio-economic status. The correlation between socio

  2. Urban Water Cycle Simulation/Management Models: A Review

    Directory of Open Access Journals (Sweden)

    Carlos Andrés Peña-Guzmán

    2017-04-01

    Full Text Available Urban water management is increasingly important given the need to maintain water resources that comply with global and local standards of quantity and quality. The effective management of water resources requires the optimization of financial resources without forsaking social requirements. A number of mathematical models have been developed for this task; such models account for all components of the Urban Water Cycle (UWC and their interactions. The wide range of models entails the need to understand their differences in an effort to identify their applicability, so academic, state, and private sectors can employ them for environmental, economic, and social ends. This article presents a description of the UWC and relevant components, a literature review of different models developed between 1990 and 2015, and an analysis of several case studies (applications. It was found that most applications are focused on new supply sources, mainly rainwater. In brief, this article provides an overview of each model’s use (primarily within academia and potential use as a decision-making tool.

  3. A model of urban rational growth based on grey prediction

    Science.gov (United States)

    Xiao, Wenjing

    2017-04-01

    Smart growth focuses on building sustainable cities, using compact development to prevent urban sprawl. This paper establishes a series of models to implement smart growth theories into city design. Besides two specific city design cases are shown. Firstly, We establishes Smart Growth Measure Model to measure the success of smart growth of a city. And we use Full Permutation Polygon Synthetic Indicator Method to calculate the Comprehensive Indicator (CI) which is used to measure the success of smart growth. Secondly, this paper uses the principle of smart growth to develop a new growth plan for two cities. We establish an optimization model to maximum CI value. The Particle Swarm Optimization (PSO) algorithm is used to solve the model. Combined with the calculation results and the specific circumstances of cities, we make their the smart growth plan respectively.

  4. A New Model for Simulating TSS Washoff in Urban Areas

    Directory of Open Access Journals (Sweden)

    E. Crobeddu

    2011-01-01

    Full Text Available This paper presents the formulation and validation of the conceptual Runoff Quality Simulation Model (RQSM that was developed to simulate the erosion and transport of solid particles in urban areas. The RQSM assumes that solid particle accumulation on pervious and impervious areas is infinite. The RQSM simulates soil erosion using rainfall kinetic energy and solid particle transport with linear system theory. A sensitivity analysis was conducted on the RQSM to show the influence of each parameter on the simulated load. Total suspended solid (TSS loads monitored at the outlet of the borough of Verdun in Canada and at three catchment outlets of the City of Champaign in the United States were used to validate the RQSM. TSS loads simulated by the RQSM were compared to measured loads and to loads simulated by the Rating Curve model and the Exponential model of the SWMM software. The simulation performance of the RQSM was comparable to the Exponential and Rating Curve models.

  5. Using urban forest assessment tools to model bird habitat potential

    Science.gov (United States)

    Susannah B. Lerman; Keith H. Nislow; David J. Nowak; Stephen DeStefano; David I. King; D. Todd. Jones-Farrand

    2014-01-01

    The alteration of forest cover and the replacement of native vegetation with buildings, roads, exotic vegetation, and other urban features pose one of the greatest threats to global biodiversity. As more land becomes slated for urban development, identifying effective urban forest wildlife management tools becomes paramount to ensure the urban forest provides habitat...

  6. Bullying among adolescents in a Brazilian urban center – “Health in Beagá” Study

    Science.gov (United States)

    da Costa, Michelle Ralil; Xavier, César Coelho; Andrade, Amanda Cristina de Souza; Proietti, Fernando Augusto; Caiaffa, Waleska Teixeira

    2015-01-01

    OBJECTIVE To analyze the prevalence of bullying and its associated factors in Brazilian adolescents. METHODS Data were used from a population-based household survey conducted by the Urban Health Observatory (OSUBH) utilizing probability sampling in three stages: census tracts, residences, and individuals. The survey included 598 adolescents (14-17 years old) who responded questions on bullying, sociodemographic characteristics, health-risk behaviors, educational well-being, family structure, physical activity, markers of nutritional habits, and subjective well-being (body image, personal satisfaction, and satisfaction with their present and future life). Univariate and multivariate analysis was done using robust Poisson regression. RESULTS The prevalence of bullying was 26.2% (28.0% among males, 24.0% among females). The location of most bullying cases was at or on route to school (70.5%), followed by on the streets (28.5%), at home (9.8%), while practicing sports (7.3%), at parties (4.6%), at work (1.7%), and at other locations (1.6%). Reports of bullying were associated with life dissatisfaction, difficulty relating to parents, involvement in fights with peers and insecurity in the neighborhood. CONCLUSIONS A high prevalence of bullying among participating adolescents was found, and the school serves as the main bullying location, although other sites such as home, parties and workplace were also reported. Characteristics regarding self-perception and adolescent perceptions of their environment were also associated with bullying, thus advancing the knowledge of this type of violence, especially in urban centers of developing countries. PMID:26274869

  7. [Evolution of the consumption of toxic substances among the adolescents of an urban area (1997-2004)].

    Science.gov (United States)

    Pérez Milena, Alejandro; Leal Helmling, Francisco Javier; Jiménez Pulido, Idoia; Mesa Gallardo, Inmaculada; Martínez Fernández, M Luz; Pérez Milena, Rafael

    2007-06-01

    To find the evolution of the consumption of alcohol, tobacco and other drugs among adolescents in an urban area. Descriptive, cross-sectional study using a self-administered questionnaire. Secondary school (middle-class urban area). Six hundred and seventy-eight students took part in the years 1997, 2001, and 2004. The questionnaire included questions on age, sex and consumption of toxic substances. The following figures are given in order of the year of study. We studied 172, 249, and 257 adolescents, with a mean age of 14 (interval, 12-17) and equality of sexes. The proportion of adolescents with no consumption of toxic substances increased (21%+/-3.1%; 34%+/-3.0% 56%+/-3.1%; Pconsumption dropped (58%+/-3.6%; 61%+/-3.2%; 41%+/-3.1%; Pconsumption increased (84%+/-2.6%; 85%+/-2.2%; 96%+/-1.2%; Pconsumption increased (12%+/-2.4%; 21%+/-2.3%; 29%+/-2.4%; Pconsumption of illegal rugs also increased (9%+/-0.6%; 24%+/-2.8%; 16%+/-2.4%; Pconsumption (87%+/-1.6%; 71%+/-2.3%; 85%+/-1.8). Cannabis is the most used drug (>90%), cocaine use fell and design drug use increased. Age affected consumption, but sex did not. In the last 8 years the consumption of toxic substances among adolescents has dropped, mainly because of less alcohol consumption. However, new forms of consumption of alcohol and other illegal drugs, especially at weekends, emerged and daily consumption of tobacco increased.

  8. Bullying among adolescents in a Brazilian urban center – “Health in Beagá” Study

    Directory of Open Access Journals (Sweden)

    Michelle Ralil da Costa

    2015-01-01

    Full Text Available OBJECTIVE To analyze the prevalence of bullying and its associated factors in Brazilian adolescents.METHODS Data were used from a population-based household survey conducted by the Urban Health Observatory (OSUBH utilizing probability sampling in three stages: census tracts, residences, and individuals. The survey included 598 adolescents (14-17 years old who responded questions on bullying, sociodemographic characteristics, health-risk behaviors, educational well-being, family structure, physical activity, markers of nutritional habits, and subjective well-being (body image, personal satisfaction, and satisfaction with their present and future life. Univariate and multivariate analysis was done using robust Poisson regression.RESULTS The prevalence of bullying was 26.2% (28.0% among males, 24.0% among females. The location of most bullying cases was at or on route to school (70.5%, followed by on the streets (28.5%, at home (9.8%, while practicing sports (7.3%, at parties (4.6%, at work (1.7%, and at other locations (1.6%. Reports of bullying were associated with life dissatisfaction, difficulty relating to parents, involvement in fights with peers and insecurity in the neighborhood.CONCLUSIONS A high prevalence of bullying among participating adolescents was found, and the school serves as the main bullying location, although other sites such as home, parties and workplace were also reported. Characteristics regarding self-perception and adolescent perceptions of their environment were also associated with bullying, thus advancing the knowledge of this type of violence, especially in urban centers of developing countries.

  9. Efficient integrated model predictive control of urban drainage systems using simplified conceptual quality models

    OpenAIRE

    Sun, Congcong; Joseph Duran, Bernat; Maruejouls, Thibaud; Cembrano Gennari, Gabriela; Muñoz, eduard; Messeguer Amela, Jordi; Montserrat, Albert; Sampe, Sara; Puig Cayuela, Vicenç; Litrico, Xavier

    2017-01-01

    Integrated control of urban drainage systems considering urban drainage networks (UDN), wastewater treatment plants (WWTP) and the receiving environment seeks to minimize the impact of combined sewer overflow (CSO) to the receiving environment during wet weather. This paper will show first results of the integrated control of UDN and WWTP, obtained by LIFE-EFFIDRAIN, which is a collaborative project between academia and industry in Barcelona (Spain) and Bordeaux (France). Model predictive con...

  10. High-resolution urban flood modelling - a joint probability approach

    Science.gov (United States)

    Hartnett, Michael; Olbert, Agnieszka; Nash, Stephen

    2017-04-01

    The hydrodynamic modelling of rapid flood events due to extreme climatic events in urban environment is both a complex and challenging task. The horizontal resolution necessary to resolve complexity of urban flood dynamics is a critical issue; the presence of obstacles of varying shapes and length scales, gaps between buildings and the complex geometry of the city such as slopes affect flow paths and flood levels magnitudes. These small scale processes require a high resolution grid to be modelled accurately (2m or less, Olbert et al., 2015; Hunter et al., 2008; Brown et al., 2007) and, therefore, altimetry data of at least the same resolution. Along with availability of high-resolution LiDAR data and computational capabilities, as well as state of the art nested modelling approaches, these problems can now be overcome. Flooding and drying, domain definition, frictional resistance and boundary descriptions are all important issues to be addressed when modelling urban flooding. In recent years, the number of urban flood models dramatically increased giving a good insight into various modelling problems and solutions (Mark et al., 2004; Mason et al., 2007; Fewtrell et al., 2008; Shubert et al., 2008). Despite extensive modelling work conducted for fluvial (e.g. Mignot et al., 2006; Hunter et al., 2008; Yu and Lane, 2006) and coastal mechanisms of flooding (e.g. Gallien et al., 2011; Yang et al., 2012), the amount of investigations into combined coastal-fluvial flooding is still very limited (e.g. Orton et al., 2012; Lian et al., 2013). This is surprising giving the extent of flood consequences when both mechanisms occur simultaneously, which usually happens when they are driven by one process such as a storm. The reason for that could be the fact that the likelihood of joint event is much smaller than those of any of the two contributors occurring individually, because for fast moving storms the rainfall-driven fluvial flood arrives usually later than the storm surge

  11. Modelling of the Annual Mean Urban Heat Island Pattern for Planning of Representative Urban Climate Station Network

    OpenAIRE

    Unger, János; Savić, Stevan; Gál, Tamás

    2011-01-01

    The spatial distribution of the annual mean urban heat island (UHI) intensity pattern was analysed for the medium-sized city Novi Sad, Serbia, located on the low and flat Great Hungarian Plain. The UHI pattern was determined by an empirical modelling method developed by (Balázs et al. 2009). This method was based on datasets from urban areas of Szeged and Debrecen (Hungary). The urban study area in Novi Sad (60 km2) was established as a grid network of 240 cells (0.5 km ×0.5 km). A Landsat sa...

  12. Uncertainty Assessment in Long Term Urban Drainage Modelling

    DEFF Research Database (Denmark)

    Thorndahl, Søren

    on the rainfall inputs. In order to handle the uncertainties three different stochastic approaches are investigated applying a case catchment in the town Frejlev: (1) a reliability approach in which a parameterization of the rainfall input is conducted in order to generate synthetic rainfall events and find...... return periods, and even within the return periods specified in the design criteria. If urban drainage models are based on standard parameters and hence not calibrated, the uncertainties are even larger. The greatest uncertainties are shown to be the rainfall input and the assessment of the contributing...

  13. Can we model the implementation of water sensitive urban design in evolving cities?

    Science.gov (United States)

    Bach, Peter Marcus; Mccarthy, David T; Deletic, Ana

    2015-01-01

    This study showcases the dynamic simulation capabilities of the Urban Biophysical Environments And Technologies Simulator (UrbanBEATS) on a Melbourne catchment. UrbanBEATS simulates the planning, design and implementation of water sensitive urban design (WSUD) infrastructure in urban environments. It considers explicitly the interaction between urban and water infrastructure planning through time. The model generates a large number of realizations of different WSUD interventions and their evolution through time based on a user-defined scenario. UrbanBEATS' dynamics was tested for the first time on a historical case study of Scotchman's Creek catchment and was trained using historical data (e.g. planning documents, narratives, urban development and societal information) to adequately reproduce patterns of uptake of specific WSUD technologies. The trained model was also used to explore the implications of more stringent future water management objectives. Results highlighted the challenges of meeting this legislation and the opportunities that can be created through the mix of multiple spatial scales.

  14. Point cloud data fusion for enhancing 2d urban flood modelling

    NARCIS (Netherlands)

    Meesuk, V.

    2017-01-01

    Modelling urban flood dynamics requires proper handling of a number of complex urban features. Although high-resolution topographic data can nowadays be obtained from aerial LiDAR surveys, such top-view LiDAR data still have difficulties to represent some key components of urban features.

  15. Learning to Be Gendered: Gender Socialization in Early Adolescence Among Urban Poor in Delhi, India, and Shanghai, China.

    Science.gov (United States)

    Basu, Sharmistha; Zuo, Xiayun; Lou, Chaohua; Acharya, Rajib; Lundgren, Rebecka

    2017-10-01

    The purpose of the study is to understand the gender socialization process in early adolescence. The study was located in two disadvantaged urban communities in Delhi, India and Shanghai, China and was part of the multicountry (15) Global Early Adolescent Study. Qualitative methodologies were used with boys and girls aged 11-13 years, including 16 group-based timeline exercises and 65 narrative interviews. In addition, 58 parents of participating adolescents were interviewed. Interviews were recorded, transcribed, translated, and uploaded into Atlas.ti for coding and thematic analysis. Boys and girls growing up in the same community were directed onto different pathways during their transition from early to late adolescence. Adolescents and parents in both sites identified mothers as the primary actor, socializing adolescents into how to dress and behave and what gender roles to play, although fathers were also mentioned as influential. Opposite-sex interactions were restricted, and violations enforced by physical violence. In Delhi, gender roles and mobility were more strictly enforced for girls than boys. Restrictions on opposite-sex interactions were rigid for both boys and girls in Delhi and Shanghai. Sanctions, including beating, for violating norms about boy-girl relationships were more punitive than those related to dress and demeanor, especially in Delhi. Education and career expectations were notably more equitable in Shanghai. Parents teach their children to adhere to inequitable gender norms in both Delhi and Shanghai. However, education and career expectations for boys and girls in the two sites differed. Although gender norms varied by site according to the particular cultural and historical context, similar patterns of gender inequity reflect the underlying patriarchal system in both settings. The tendency of parents to pass on the norms they grew up with is evident, yet these results illustrate the social construction of gender through children

  16. Ancient Chinese capital models - Measurement system in urban planning.

    Science.gov (United States)

    Funo, Shuji

    2017-01-01

    Measurement systems are very important in urban design. This article reviews the theories of grid plans, particularly with respect to the spatial formations of ancient capital cities in Asia, and clarifies three Chinese Capital Models. The "Zhōu lǐ" Capital Model (Z) is based on the ancient text "Zhōu lǐ" that makes mention of the ideal city. However, because the description of the physical plan of the city is very brief and includes contradictory elements, conclusions regarding the specifics of the city design are extremely difficult to reach. This article proposes the most appropriate Model (Z) as an architype of the ideal Chinese city. Interestingly, there are no excavated examples of Model (Z). The two existing models, the Chang'an Capital Model (C), which is well known as the model for ancient Japanese capitals like Heiankyo (the present Kyoto) and the Dà Yuán (Dadu) Capital Model (D), the model for the city that is today Beijing, are described as Variants I and II, with a focus on the land division system of bo (street blocks).

  17. Real Time Updating in Distributed Urban Rainfall Runoff Modelling

    DEFF Research Database (Denmark)

    Borup, Morten; Madsen, Henrik

    are equipped with basins and automated structures that allow for a large degree of control of the systems, but in order to do this optimally it is required to know what is happening throughout the system. For this task models are needed, due to the large scale and complex nature of the systems. The physically...... that are being updated from system measurements was studied. The results showed that the fact alone that it takes time for rainfall data to travel the distance between gauges and catchments has such a big negative effect on the forecast skill of updated models, that it can justify the choice of even very...... when it was used to update the water level in multiple upstream basins. This method is, however, not capable of utilising the spatial correlations in the errors to correct larger parts of the models. To accommodate this a method was developed for correcting the slow changing inflows to urban drainage...

  18. Urban

    Directory of Open Access Journals (Sweden)

    Paulo José Lisboa Nobre

    2007-12-01

    Full Text Available Natal is a city with environment singularities. The urban legislation tried to preserve the features of the local landscape delimiting “Areas for Controlling Building High”, destined to protect the scenic value of some parts of the city. In 1979 was created a “NonÆdificandi” area to protect the scenery of Ponta Negra beach, one of the most famous view of the city. Since this time, the real state market, the building constructers and the land owners of this area have exerted constant pressure in sense to abolish or to modify this legal instrument.Nowadays, the public administration presented a new project which try to answer public and private interests.This paper is the result of an inclusion of the University in this polemic issue. Architecture and Urban Planning and Statistic students of two universities of the city (UFRN and UNP, helped the process collecting data and producing information. The proposed of the investigation was to know the users of this area and their opinion about the subject. It was done together with the Public agency, Secretaria Especial de Meio Ambiente e Urbanismo. At the end, the students presented their particular solutions for the problem, inside the disciplines of Landscaping and Urban Planning.

  19. Micro-meteorological modelling in urban areas: pollutant dispersion and radiative effects modelling

    International Nuclear Information System (INIS)

    Milliez, Maya

    2006-01-01

    Atmospheric pollution and urban climate studies require to take into account the complex processes due to heterogeneity of urban areas and the interaction with the buildings. In order to estimate the impact of buildings on flow and pollutant dispersion, detailed numerical simulations were performed over an idealized urban area, with the three-dimensional model Mercure-Saturne, modelling both concentration means and their fluctuations. To take into account atmospheric radiation in built up areas and the thermal effects of the buildings, we implemented a three-dimensional radiative model adapted to complex geometry. This model, adapted from a scheme used for thermal radiation, solves the radiative transfer equation in a semi-transparent media, using the discrete ordinate method. The new scheme was validated with idealized cases and compared to a complete case. (author) [fr

  20. Rural-urban migration patterns and mental health diagnoses of adolescents and young adults in British Columbia, Canada: a case-control study.

    Science.gov (United States)

    Maggi, Stefania; Ostry, Aleck; Callaghan, Kristy; Hershler, Ruth; Chen, Lisa; D'Angiulli, Amedeo; Hertzman, Clyde

    2010-05-13

    The identification of mental health problems early in life can increase the well-being of children and youth. Several studies have reported that youth who experience mental health disorders are also at a greater risk of developing psychopathological conditions later in life, suggesting that the ability of researchers and clinicians to identify mental health problems early in life may help prevent adult psychopathology. Using large-scale administrative data, this study examined whether permanent settlement and within-province migration patterns may be linked to mental health diagnoses among adolescents (15 to 19 years old), young adults (20 to 30 years old), and adults (30 years old and older) who grew up in rural or urban communities or migrated between types of community (N = 8,502). We conducted a nested case-control study of the impact of rural compared to urban residence and rural-urban provincial migration patterns on diagnosis of mental health. Conditional logistic regression models were run with the following International Classification of Diseases, 9th Revision (ICD-9) mental health diagnoses as the outcomes: neurotic disorders, personality disorder, acute reaction to stress, adjustment reaction, depression, alcohol dependence, and nondependent drug abuse. Analyses were conducted controlling for paternal mental health and sociodemographic characteristics. Mental health diagnoses were selectively associated with stability and migration patterns. Specifically, adolescents and young adults who were born in and grew up in the same rural community were at lower risk of being diagnosed with acute reaction to stress (OR = 0.740) and depression (OR = 0.881) compared to their matched controls who were not born in and did not grow up in the same rural community. Furthermore, adolescents and young adults migrating between rural communities were at lower risk of being diagnosed with adjustment reaction (OR = 0.571) than those not migrating between rural communities

  1. THE INTEGRATED WRF/URBAN MODELING SYSTEM AND ITS APPLICATION TO MONITORING URBAN HEAT ISLAND IN JAKARTA, INDONESIA

    Directory of Open Access Journals (Sweden)

    Laras Tursilowati

    2012-01-01

    Full Text Available Population growth and urbanization will impact on city development through constructions of buildings, parking lots, streets, highways and driveways. These changes lead to the Urban Heat Island (UHI, which is an important factor for future urban planning. In this context, mesoscale climate models such as the Weather Research and Forecasting (WRF model are useful for studying the potential deficit in open green areas. The analysis of remote sensing images can provide input data indispensable to such climate model studies. In this work, we analyze the land use/land cover information inside and around the city of Jakarta, Indonesia, to study how the land use (LU change affects UHI that is characterized by the highest surface air temperature (Ta of 306 K. It is found that LU modification with the addition of 25% urban area will expand the UHI area by around 43 km2 (5%. On the contrary, with the addition of 58, 95 and 440% vegetation (grassland in the urban area, the UHI area is reduced significantly, which are 255 km2 (48%, 289 km2 (54% and 466 km² (88%, respectively. This indicates that the addition of more area with open green coverage results in more reduction of UHI area. The quantitative features of this relationship will be useful for urban planners to control the UHI effects that might degrade the living conditions in this megacity.

  2. Evaluating procedural modelling for 3D models of informal settlements in urban design activities

    Directory of Open Access Journals (Sweden)

    Victoria Rautenbach

    2015-11-01

    Full Text Available Three-dimensional (3D modelling and visualisation is one of the fastest growing application fields in geographic information science. 3D city models are being researched extensively for a variety of purposes and in various domains, including urban design, disaster management, education and computer gaming. These models typically depict urban business districts (downtown or suburban residential areas. Despite informal settlements being a prevailing feature of many cities in developing countries, 3D models of informal settlements are virtually non-existent. 3D models of informal settlements could be useful in various ways, e.g. to gather information about the current environment in the informal settlements, to design upgrades, to communicate these and to educate inhabitants about environmental challenges. In this article, we described the development of a 3D model of the Slovo Park informal settlement in the City of Johannesburg Metropolitan Municipality, South Africa. Instead of using time-consuming traditional manual methods, we followed the procedural modelling technique. Visualisation characteristics of 3D models of informal settlements were described and the importance of each characteristic in urban design activities for informal settlement upgrades was assessed. Next, the visualisation characteristics of the Slovo Park model were evaluated. The results of the evaluation showed that the 3D model produced by the procedural modelling technique is suitable for urban design activities in informal settlements. The visualisation characteristics and their assessment are also useful as guidelines for developing 3D models of informal settlements. In future, we plan to empirically test the use of such 3D models in urban design projects in informal settlements.

  3. Modeling Impact of Urbanization in US Cities Using Simple Biosphere Model SiB2

    Science.gov (United States)

    Zhang, Ping; Bounoua, Lahouari; Thome, Kurtis; Wolfe, Robert

    2016-01-01

    We combine Landsat- and the Moderate Resolution Imaging Spectroradiometer (MODIS)-based products, as well as climate drivers from Phase 2 of the North American Land Data Assimilation System (NLDAS-2) in a Simple Biosphere land surface model (SiB2) to assess the impact of urbanization in continental USA (excluding Alaska and Hawaii). More than 300 cities and their surrounding suburban and rural areas are defined in this study to characterize the impact of urbanization on surface climate including surface energy, carbon budget, and water balance. These analyses reveal an uneven impact of urbanization across the continent that should inform upon policy options for improving urban growth including heat mitigation and energy use, carbon sequestration and flood prevention.

  4. Correlates of smoking susceptibility among adolescents in a peri-urban area of Nepal: a population-based cross-sectional study in the Jhaukhel-Duwakot Health Demographic Surveillance Site

    Directory of Open Access Journals (Sweden)

    Umesh R. Aryal

    2014-07-01

    Full Text Available Background: Susceptibility to smoking is defined as an absence of firm commitment not to smoke in the future or when offered a cigarette by best friends. Susceptibility begins in adolescence and is the first step in the transition to becoming an established smoker. Many scholars have hypothesized and studied whether psychosocial risk factors play a crucial role in preventing adolescent susceptibility to smoking or discourage susceptible adolescents from becoming established smokers. Our study examined sociodemographic and family and childhood environmental factors associated with smoking susceptibility among adolescents in a peri-urban area of Nepal. Design: We conducted a population-based cross-sectional study during October–November 2011 in the Jhaukhel-Duwakot Health Demographic Surveillance Site (JD-HDSS located in a peri-urban area near Kathmandu, the capital city of Nepal, where tobacco products are easily available. Trained local enumerators conducted face-to-face interviews with 352 respondents aged 14–16. We used stepwise logistic regression to assess sociodemographic and family and childhood environmental factors associated with smoking susceptibility. Results: The percentage of smoking susceptibility among respondents was 49.70% (95% CI: 44.49; 54.93. Multivariable analysis demonstrated that smoking susceptibility was associated with smoking by exposure of adolescents to pro-tobacco advertisements (AOR [adjusted odds ratio] =2.49; 95% CI: 1.46–4.24, the teacher (2.45; 1.28–4.68, adolescents attending concerts/picnics (2.14; 1.13–4.04, and smoking by other family members/relatives (1.76; 1.05–2.95. Conclusions: Smoking susceptible adolescents are prevalent in the JD-HDSS, a peri-urban community of Nepal. Several family and childhood environmental factors increased susceptibility to smoking among Nepalese non-smoking adolescents. Therefore, intervention efforts need to be focused on family and childhood environmental factors

  5. An Integrated Model Based on a Hierarchical Indices System for Monitoring and Evaluating Urban Sustainability

    Directory of Open Access Journals (Sweden)

    Xulin Guo

    2013-02-01

    Full Text Available Over 50% of world’s population presently resides in cities, and this number is expected to rise to ~70% by 2050. Increasing urbanization problems including population growth, urban sprawl, land use change, unemployment, and environmental degradation, have markedly impacted urban residents’ Quality of Life (QOL. Therefore, urban sustainability and its measurement have gained increasing attention from administrators, urban planners, and scientific communities throughout the world with respect to improving urban development and human well-being. The widely accepted definition of urban sustainability emphasizes the balancing development of three primary domains (urban economy, society, and environment. This article attempts to improve the aforementioned definition of urban sustainability by incorporating a human well-being dimension. Major problems identified in existing urban sustainability indicator (USI models include a weak integration of potential indicators, poor measurement and quantification, and insufficient spatial-temporal analysis. To tackle these challenges an integrated USI model based on a hierarchical indices system was established for monitoring and evaluating urban sustainability. This model can be performed by quantifying indicators using both traditional statistical approaches and advanced geomatic techniques based on satellite imagery and census data, which aims to provide a theoretical basis for a comprehensive assessment of urban sustainability from a spatial-temporal perspective.

  6. Numerical modeling of the sound fields in urban squares.

    Science.gov (United States)

    Kang, Jian

    2005-06-01

    This paper studies the basic characteristics of sound fields in urban squares surrounded by reflecting building façades and the effectiveness of architectural changes and urban design options. A radiosity model and an image source model are developed, and a parametric study is carried out in hypothetical squares. The results show that the reverberation time (RT) is rather even in a square, whereas the early decay time (EDT) is very low in the near field, and then becomes close to RT after a rapid increase. Compared to diffuse boundaries, with geometrical boundaries the RT and EDT are significantly longer and the sound pressure level (SPL) attenuation with distance is generally smaller unless the height/side ratio is high. With a boundary diffusion coefficient of 0.2, the sound field is already close to that resulting from purely diffusely reflecting boundaries. The SPL in far field is typically 6-9 dB lower if the square side is doubled; 8 dB lower if the height of building façades is decreased from 50 m to 6 m (diffuse boundaries); 5 dB (diffuse boundaries) or 2 dB (geometrical boundaries) lower if the length/width ratio is increased from 1 to 4; and 10-12 dB lower if the boundary absorption coefficient is increased from 0.1 to 0.9.

  7. MODELING URBAN DYNAMICS USING RANDOM FOREST: IMPLEMENTING ROC AND TOC FOR MODEL EVALUATION

    Directory of Open Access Journals (Sweden)

    M. Ahmadlou

    2016-06-01

    Full Text Available The importance of spatial accuracy of land use/cover change maps necessitates the use of high performance models. To reach this goal, calibrating machine learning (ML approaches to model land use/cover conversions have received increasing interest among the scholars. This originates from the strength of these techniques as they powerfully account for the complex relationships underlying urban dynamics. Compared to other ML techniques, random forest has rarely been used for modeling urban growth. This paper, drawing on information from the multi-temporal Landsat satellite images of 1985, 2000 and 2015, calibrates a random forest regression (RFR model to quantify the variable importance and simulation of urban change spatial patterns. The results and performance of RFR model were evaluated using two complementary tools, relative operating characteristics (ROC and total operating characteristics (TOC, by overlaying the map of observed change and the modeled suitability map for land use change (error map. The suitability map produced by RFR model showed 82.48% area under curve for the ROC model which indicates a very good performance and highlights its appropriateness for simulating urban growth.

  8. Modelling the urban water cycle as an integrated part of the city: a review.

    Science.gov (United States)

    Urich, Christian; Rauch, Wolfgang

    2014-01-01

    In contrast to common perceptions, the urban water infrastructure system is a complex and dynamic system that is constantly evolving and adapting to changes in the urban environment, to sustain existing services and provide additional ones. Instead of simplifying urban water infrastructure to a static system that is decoupled from its urban context, new management strategies use the complexity of the system to their advantage by integrating centralised with decentralised solutions and explicitly embedding water systems into their urban form. However, to understand and test possible adaptation strategies, urban water modelling tools are required to support exploration of their effectiveness as the human-technology-environment system coevolves under different future scenarios. The urban water modelling community has taken first steps to developing these new modelling tools. This paper critically reviews the historical development of urban water modelling tools and provides a summary of the current state of integrated modelling approaches. It reflects on the challenges that arise through the current practice of coupling urban water management tools with urban development models and discusses a potential pathway towards a new generation of modelling tools.

  9. Development of a theater-based nutrition and physical activity intervention for low-income, urban, African American adolescents.

    Science.gov (United States)

    Jackson, Caree J; Mullis, Rebecca M; Hughes, Marilyn

    2010-01-01

    Childhood overweight is disproportionately worse in minority and low-income populations. Theater is a promising and effective tool for delivering health education to these underserved populations, but no known studies have examined the use of theater to promote both nutrition and physical activity to minority youth. To develop an interactive, theater-based intervention that conveys health messages to low-income, urban, African Americans and engages them in learning ways to adopt a healthy lifestyle. Community partners worked to develop a theater-based nutrition and physical activity intervention. A focus group provided urban adolescents' thoughts about their desires for the intervention. Based on input from all community partners, the group created a theater-based intervention. Researchers used a quasi-experimental (pre-/posttest) design with a community-based participatory research (CBPR) approach. Participants learned health messages through theater, dance, and music and gave feedback on the program sessions and materials. The program ended with a dinner theater performance showcasing information that students learned during the intervention. Participants received six theater-based health lessons. Learning objectives for each health education session were achieved. Each participant contributed to and performed in the final performance. All program participants were highly satisfied with the theater-based method of learning health messages. A community-academic partnership succeeded in developing a theater-based nutrition and physical activity intervention that satisfied participating adolescents.

  10. Environmental Modelling of Remediation of Urban Contaminated Areas. Report of the Urban Remediation Working Group of EMRAS Theme 2

    International Nuclear Information System (INIS)

    2012-01-01

    The Urban Remediation Working Group of the International Atomic Energy Agency's EMRAS (Environmental Modelling for RAdiation Safety) programme was concerned with remediation assessment for urban areas contaminated with dispersed radionuclides. Types of events that could result in dispersal or deposition of radionuclides in an urban situation include both intentional and unintentional events, and releases could range from major events involving a nuclear facility to small events such as a transportation accident. The primary objective of the Urban Remediation Working Group was (1) to test and improve the prediction of dose rates and cumulative doses to humans for urban areas contaminated with dispersed radionuclides, including prediction of changes in radionuclide concentrations or dose rates as a function of location and time; (2) to identify the most important pathways for human exposure; and (3) to predict the reduction in radionuclide concentrations, dose rates, or doses expected to result from various countermeasures or remediation efforts. Specific objectives of the Working Group have included (1) the identification of realistic scenarios for a wide variety of situations, (2) comparison and testing of approaches and models for assessing the significance of a given contamination event and for guiding decisions about countermeasures or remediation measures implemented to reduce doses to humans or to clean up the contaminated area, and (3) improving the understanding of processes and situations that affect the spread of contamination to aid in the development of appropriate models and parameter values for use in assessment of these situations. The major activities of the Working Group have included three areas. The first of these was a review of the available modelling approaches and computer models for use in assessing urban contamination and potential countermeasures or remediation activities. The second area of work was a modelling exercise based on data

  11. Urbanization Impacts on Mammals across Urban-Forest Edges and a Predictive Model of Edge Effects

    OpenAIRE

    Villaseñor, Nélida R.; Driscoll, Don A.; Escobar, Martín A. H.; Gibbons, Philip; Lindenmayer, David B.

    2014-01-01

    With accelerating rates of urbanization worldwide, a better understanding of ecological processes at the wildland-urban interface is critical to conserve biodiversity. We explored the effects of high and low-density housing developments on forest-dwelling mammals. Based on habitat characteristics, we expected a gradual decline in species abundance across forest-urban edges and an increased decline rate in higher contrast edges. We surveyed arboreal mammals in sites of high and low housing den...

  12. Photochemistry of an Urban Region using Observations and Numerical Modeling

    Science.gov (United States)

    Cantrell, C. A.; Mauldin, L.; Mukherjee, A. D.; Flocke, F. M.; Pfister, G.; Apel, E. C.; Bahreini, R.; Blake, D. R.; Blake, N. J.; Campos, T. L.; Cohen, R. C.; Farmer, D.; Fried, A.; Guenther, A. B.; Hall, S. R.; Heikes, B.; Hornbrook, R. S.; Huey, L. G.; Karl, T.; Kaser, L.; Nowak, J. B.; Ortega, J. V.; O'Sullivan, D. W.; Richter, D.; Smith, J. N.; Tanner, D.; Townsend-Small, A.; Ullmann, K.; Walega, J.; Weibring, P.; Weinheimer, A. J.

    2015-12-01

    The chemistry of HOx radicals in the troposphere can lead to the production of secondary products such as ozone and aerosols, while volatile organic compounds are degraded. The production rates and identities of secondary products depend on the abundance of NOx and other parameters. The amounts of VOCs and NOx can also affect the concentrations of OH, HO2 and RO2. Comparison of observations and model-derived values of HOx species can provide one way to assess the completeness and accuracy of model mechanisms. The functional dependence of measure-model agreement on various controlling parameters can also reveal details of current understanding of photochemistry in urban regions. During the Front Range Air Pollution and Photochemistry Experiment (FRAPPE), conducted during the summer of 2014, observations from ground-based and airborne platforms were performed to study the evolution of atmospheric composition over the Denver metropolitan area. Of particular interest in FRAPPE was the assessment of the roles of mixing of emissions from oil and gas exploration and extraction, and those from confined animal production operations, with urban emissions (e.g. from transportation, energy production, and industrial processes) on air quality in the metropolitan and surrounding region. Our group made measurements of OH, HO2, and HO2 + RO2 from the NSF/NCAR C-130 aircraft platform using selected ion chemical ionization mass spectrometry. The C-130 was equipped with instrumentation for the observation of a wide variety of photochemical-related species and parameters. These data are used to assess the photochemical regimes encountered during the period of the study, and to quantitatively describe the chemical processes involved in formation of secondary products. One of the tools used is a steady state model for short-lived species such as those that we observed. This presentation summarizes the behavior of species that were measured during FRAPPE and what the observations reveal

  13. A 2D simulation model for urban flood management

    Science.gov (United States)

    Price, Roland; van der Wielen, Jonathan; Velickov, Slavco; Galvao, Diogo

    2014-05-01

    The European Floods Directive, which came into force on 26 November 2007, requires member states to assess all their water courses and coast lines for risk of flooding, to map flood extents and assets and humans at risk, and to take adequate and coordinated measures to reduce the flood risk in consultation with the public. Flood Risk Management Plans are to be in place by 2015. There are a number of reasons for the promotion of this Directive, not least because there has been much urban and other infrastructural development in flood plains, which puts many at risk of flooding along with vital societal assets. In addition there is growing awareness that the changing climate appears to be inducing more frequent extremes of rainfall with a consequent increases in the frequency of flooding. Thirdly, the growing urban populations in Europe, and especially in the developing countries, means that more people are being put at risk from a greater frequency of urban flooding in particular. There are urgent needs therefore to assess flood risk accurately and consistently, to reduce this risk where it is important to do so or where the benefit is greater than the damage cost, to improve flood forecasting and warning, to provide where necessary (and possible) flood insurance cover, and to involve all stakeholders in decision making affecting flood protection and flood risk management plans. Key data for assessing risk are water levels achieved or forecasted during a flood. Such levels should of course be monitored, but they also need to be predicted, whether for design or simulation. A 2D simulation model (PriceXD) solving the shallow water wave equations is presented specifically for determining flood risk, assessing flood defense schemes and generating flood forecasts and warnings. The simulation model is required to have a number of important properties: -Solve the full shallow water wave equations using a range of possible solutions; -Automatically adjust the time step and

  14. Fuzzy pricing for urban water resources: model construction and application.

    Science.gov (United States)

    Zhao, Ranhang; Chen, Shouyu

    2008-08-01

    A rational water price system plays a crucial role in the optimal allocation of water resources. In this paper, a fuzzy pricing model for urban water resources is presented, which consists of a multi-criteria fuzzy evaluation model and a water resources price (WRP) computation model. Various factors affecting WRP are comprehensively evaluated with multiple levels and objectives in the multi-criteria fuzzy evaluation model, while the price vectors of water resources are constructed in the WRP computation model according to the definition of the bearing water price index, and then WRP is calculated. With the incorporation of an operator's knowledge, it considers iterative weights and subjective preference of operators for weight-assessment. The weights determined are more rational and the evaluation results are more realistic. Particularly, dual water supply is considered in the study. Different prices being fixed for water resources with different qualities conforms to the law of water resources value (WRV) itself. A high-quality groundwater price computation model is also proposed to provide optimal water allocation and to meet higher living standards. The developed model is applied in Jinan for evaluating its validity. The method presented in this paper offers some new directions in the research of WRP.

  15. [Attempt to elaborate an explanating model of adolescents' contraceptive behavior].

    Science.gov (United States)

    Bodson, B; Bogaerts, S; Mondeville, D; Sciama, S; Vandekeere, M

    1986-11-01

    Of the 3 main currents of literature seeking to explain adolescent pregnancy, the medical and demographic currents have essentially produced descriptions of behaviors, attitudes, and opinions, while the psychological current has produced primarily hypotheses interpreting sexual and contraceptive behavior in terms of predispositions. This work seeks to develop an explanatory framework for adolescent sexual and contraceptive behavior in which situational variables would be included. The explanatory variables utilized in the framework were informative and sociological variables, beliefs associated with side effects of contraceptive methods, social support for contraceptive use, norms associated with heterosexual behavior, ability to foresee future consequences, future prospects, perceptions of pregnancy and its consequences, and evaluation of the risk of pregnancy. A semiclosed questionnaire exploring the different model variables was orally administered to 186 female secondary school students in Liege, France. The data were subjected to a discriminant function analysis which permitted assessment of the role of each explanatory variable in determining contraceptive behavior. 53% of the respondents did not use contraception. 91% of those using contraception used pills. 5 types of contraceptive behavior were noted: 1) 20% of the sample were sexually active and had always used contraception 2) 20% were sexually active and used contraception but had not always done so 3) 13% were sexually active but had never used contraception 4) 40% were not sexually active and did not use contraception, and 5) 7% were not sexually active but used a contraceptive. The variables explained 75% of the difference between adolescents who used and did not use contraception, and 39% of the difference between adolescents ever exposed to risk of pregnancy or never exposed. The principle variables explaining use or nonuse of contraception were stated in declining order of importance. Girls having

  16. Evaluation of the WRF-Urban Modeling System Coupled to Noah and Noah-MP Land Surface Models Over a Semiarid Urban Environment

    Science.gov (United States)

    Salamanca, Francisco; Zhang, Yizhou; Barlage, Michael; Chen, Fei; Mahalov, Alex; Miao, Shiguang

    2018-03-01

    We have augmented the existing capabilities of the integrated Weather Research and Forecasting (WRF)-urban modeling system by coupling three urban canopy models (UCMs) available in the WRF model with the new community Noah with multiparameterization options (Noah-MP) land surface model (LSM). The WRF-urban modeling system's performance has been evaluated by conducting six numerical experiments at high spatial resolution (1 km horizontal grid spacing) during a 15 day clear-sky summertime period for a semiarid urban environment. To assess the relative importance of representing urban surfaces, three different urban parameterizations are used with the Noah and Noah-MP LSMs, respectively, over the two major cities of Arizona: Phoenix and Tucson metropolitan areas. Our results demonstrate that Noah-MP reproduces somewhat better than Noah the daily evolution of surface skin temperature and near-surface air temperature (especially nighttime temperature) and wind speed. Concerning the urban areas, bulk urban parameterization overestimates nighttime 2 m air temperature compared to the single-layer and multilayer UCMs that reproduce more accurately the daily evolution of near-surface air temperature. Regarding near-surface wind speed, only the multilayer UCM was able to reproduce realistically the daily evolution of wind speed, although maximum winds were slightly overestimated, while both the single-layer and bulk urban parameterizations overestimated wind speed considerably. Based on these results, this paper demonstrates that the new community Noah-MP LSM coupled to an UCM is a promising physics-based predictive modeling tool for urban applications.

  17. Educational complex of light-colored modeling of urban environment

    Directory of Open Access Journals (Sweden)

    Karpenko Vladimir E.

    2018-01-01

    Full Text Available Mechanisms, methodological tools and structure of a training complex of light-colored modeling of the urban environment are developed in this paper. The following results of the practical work of students are presented: light composition and installation, media facades, lighting of building facades, city streets and embankment. As a result of modeling, the structure of the light form is determined. Light-transmitting materials and causing characteristic optical illusions, light-visual and light-dynamic effects (video-dynamics and photostatics, basic compositional techniques of light form are revealed. The main elements of the light installation are studied, including a light projection, an electronic device, interactivity and relationality of the installation, and the mechanical device which becomes a part of the installation composition. The meaning of modern media facade technology is the transformation of external building structures and their facades into a changing information cover, into a media content translator using LED technology. Light tectonics and the light rhythm of the plastics of the architectural object are built up through point and local illumination, modeling of the urban ensemble assumes the structural interaction of several light building models with special light-composition techniques. When modeling the social and pedestrian environment, the lighting parameters depend on the scale of the chosen space and are adapted taking into account the visual perception of the pedestrian, and the atmospheric effects of comfort and safety of the environment are achieved with the help of special light compositional techniques. With the aim of realizing the tasks of light modeling, a methodology has been created, including the mechanisms of models, variability and complementarity. The perspectives of light modeling in the context of structural elements of the city, neuropsychology, wireless and bioluminescence technologies are proposed

  18. Geoadditive modelling of adolescent age of sexual initiation among ...

    African Journals Online (AJOL)

    Inferences were based on Markov Chain Monte Carlo (MCMC) techniques, while model selection was based on Deviance Information Criteria (DIC). Findings revealed significant spatial variations on level of adolescent sexual initiation among Nigerian women as well as a clear evidence of nonlinear effect of age.

  19. An Evidence-Based Practitioner's Model for Adolescent Leadership Development

    Science.gov (United States)

    Rehm, Christopher J.

    2014-01-01

    This paper proposes a model for youth leadership education based on adolescent development and leadership research in an effort to provide practitioners with a practical blueprint to aid their creation and implementation of high school leadership programs. By focusing on student leader development areas which school level educators can affect,…

  20. Attitudes, Knowledge, and Behavior Regarding Condom Use in Urban Black Adolescent Males.

    Science.gov (United States)

    Wilson, Michele D.; And Others

    1994-01-01

    Examined male adolescent behavior, attitudes, and knowledge concerning condom use. Findings from 241 sexually active black adolescent males revealed that factors associated with condom use included higher grade level, having 2 or more sexual partners in past 6 months, communication about contraception with sexual partner, desire for sexually…

  1. Online Activities of Urban Malaysian Adolescents: Report of a Pilot Study

    Science.gov (United States)

    Tan, Kok Eng; Yen Abdullah, Melissa Ng Lee; Guan Saw, Kim

    2012-01-01

    The literacy practices of many communities today show new ways of meaning making in the contemporary, technological and digital culture. A number of Malaysian adolescents belong to this culture. This pilot study reports the preliminary findings of a larger study aimed at describing the online activities of Malaysian adolescents. Fifty-four…

  2. Sociocultural Variations in the Body Image Perceptions of Urban Adolescent Females.

    Science.gov (United States)

    Abrams, Laura S.; Stormer, Colleen Cook

    2002-01-01

    Investigated the influences of ethnicity, socioeconomic status, and ethnic peer group composition on awareness and internalization of socially sanctioned standards of appearance using the Sociocultural Attitudes towards Adolescence Questionnaire. Findings for 208 adolescent females highlight the importance of multiple ecological factors in…

  3. Mother-Adolescent Communication about Tobacco Use in Urban Puerto Rican and Dominican Families

    Science.gov (United States)

    Guilamo-Ramos, Vincent; Bouris, Alida M.; Dittus, Patricia; Jaccard, James

    2008-01-01

    Research on parent-adolescent communication about cigarette smoking in Latino families remains relatively scarce. This dearth of information is worrisome given the high rates of tobacco use among Latino adolescents and the large burden borne by adult Latinos in smoking-related morbidity and mortality. This study presents qualitative data on…

  4. The Association between Asthma and Sleep in Urban Adolescents with Undiagnosed Asthma

    Science.gov (United States)

    Koinis Mitchell, Daphne; Kopel, Sheryl J.; Williams, Brittney; Cespedes, Amarilis; Bruzzese, Jean-Marie

    2015-01-01

    Background: We examined associations between asthma and sleep in a sample of inner-city adolescents with asthma-like symptoms who are undiagnosed, and to assess the extent to which youth's report of perceived stress moderates this association. Methods: A total of 349 adolescents (83% girls), with a mean age of 15.8 years, and their primary…

  5. A decision support tool for sustainable planning of urban water systems: presenting the Dynamic Urban Water Simulation Model.

    Science.gov (United States)

    Willuweit, Lars; O'Sullivan, John J

    2013-12-15

    Population growth, urbanisation and climate change represent significant pressures on urban water resources, requiring water managers to consider a wider array of management options that account for economic, social and environmental factors. The Dynamic Urban Water Simulation Model (DUWSiM) developed in this study links urban water balance concepts with the land use dynamics model MOLAND and the climate model LARS-WG, providing a platform for long term planning of urban water supply and water demand by analysing the effects of urbanisation scenarios and climatic changes on the urban water cycle. Based on potential urbanisation scenarios and their effects on a city's water cycle, DUWSiM provides the functionality for assessing the feasibility of centralised and decentralised water supply and water demand management options based on forecasted water demand, stormwater and wastewater generation, whole life cost and energy and potential for water recycling. DUWSiM has been tested using data from Dublin, the capital of Ireland, and it has been shown that the model is able to satisfactorily predict water demand and stormwater runoff. Copyright © 2013 Elsevier Ltd. All rights reserved.

  6. An urban transport emission model for the Antwerp area

    International Nuclear Information System (INIS)

    Mensink, C.; De Vlieger, I.; Nys, J.

    2000-01-01

    We present a detailed modelling approach which provides hourly emissions of CO, NO x , VOC, PM, SO 2 and Pb for individual streets and road segments in the Antwerp area (20 km x 20 km). The hourly emissions are computed as a function of road type, vehicle type, fuel type, traffic volume, vehicle age, trip length distribution and the actual ambient temperature. The traffic volumes are derived from an urban traffic flow model for the city of Antwerp, which contains a network with almost 2000 road segments. The traffic flow model has been implemented in a GIS environment. The emission factors used in the model are derived from the COPERT-II methodology. Cold start emissions and evaporation losses are included in the model. Results are shown for the hourly hot- and cold start emissions obtained for CO, NO x and VOC. For these pollutants a partial validation of the model results was carried out by comparing the COPERT-II emission factors with on-the-road traffic emission measurements carried out for gasoline passenger cars with a closed-loop controlled three-way catalyst. (author)

  7. Dietary Habits and Eating Practices and Their Association with Overweight and Obesity in Rural and Urban Black South African Adolescents.

    Science.gov (United States)

    Sedibe, Modiehi Heather; Pisa, Pedro T; Feeley, Alison B; Pedro, Titilola M; Kahn, Kathleen; Norris, Shane A

    2018-01-29

    The aim of this study was to investigate differences/similarities in dietary habits and eating practices between younger and older, rural and urban South African adolescents in specific environments (home, community and school) and their associations with overweight and obesity. Dietary habits, eating practices, and anthropometric measurements were performed on rural ( n = 392, mean age = 13 years) and urban ( n = 3098, mean age = 14 years) adolescents. Logistic regression analysis was used to examine the associations between dietary habits and eating practices, with overweight and obesity risk. Differences in dietary habits and eating practices by gender and by site within the three environments were identified. After adjusting for gender, site, dietary habits, and eating practices within the home, community and school environment, eating the main meal with family some days (OR = 1.78, 95% CI = 1.114-2.835; p ≤ 0.02), eating the main meal with family almost every day (OR = 1.61, 95% CI = 1.106-2.343; p ≤ 0.01), and irregular frequency of consuming breakfast on weekdays (OR = 1.38, 95% CI = 1.007-1.896; p ≤ 0.05) were all associated with increased risk of overweight and obesity. For "Year 15" adolescents, irregular frequency of consuming breakfast on weekends within the home environment (OR = 1.53, 95% CI = 1.099-2.129, p ≤ 0.01), was associated with increased risk of overweight and obesity. For both early- and mid-adolescents, being male (OR = 0.401, 95% CI = 0.299-0.537; p ≤ 0.00; OR = 0.29, 95% CI = 0.218-0.397; p ≤ 0.00) was associated with reduced risk of overweight and obesity, while residing in a rural setting (OR = 0.55, 95% CI = 0.324-0.924; p ≤ 0.02) was associated with reduced risk of overweight and obesity only among early-adolescents. Only dietary habits and eating practices within the home environment were associated with increased risk of overweight and obesity.

  8. Dietary Habits and Eating Practices and Their Association with Overweight and Obesity in Rural and Urban Black South African Adolescents

    Directory of Open Access Journals (Sweden)

    Modiehi Heather Sedibe

    2018-01-01

    Full Text Available The aim of this study was to investigate differences/similarities in dietary habits and eating practices between younger and older, rural and urban South African adolescents in specific environments (home, community and school and their associations with overweight and obesity. Dietary habits, eating practices, and anthropometric measurements were performed on rural (n = 392, mean age = 13 years and urban (n = 3098, mean age = 14 years adolescents. Logistic regression analysis was used to examine the associations between dietary habits and eating practices, with overweight and obesity risk. Differences in dietary habits and eating practices by gender and by site within the three environments were identified. After adjusting for gender, site, dietary habits, and eating practices within the home, community and school environment, eating the main meal with family some days (OR = 1.78, 95% CI = 1.114–2.835; p ≤ 0.02, eating the main meal with family almost every day (OR = 1.61, 95% CI = 1.106–2.343; p ≤ 0.01, and irregular frequency of consuming breakfast on weekdays (OR = 1.38, 95% CI = 1.007–1.896; p ≤ 0.05 were all associated with increased risk of overweight and obesity. For “Year 15” adolescents, irregular frequency of consuming breakfast on weekends within the home environment (OR = 1.53, 95% CI = 1.099–2.129, p ≤ 0.01, was associated with increased risk of overweight and obesity. For both early- and mid-adolescents, being male (OR = 0.401, 95% CI = 0.299–0.537; p ≤ 0.00; OR = 0.29, 95% CI = 0.218–0.397; p ≤ 0.00 was associated with reduced risk of overweight and obesity, while residing in a rural setting (OR = 0.55, 95% CI = 0.324–0.924; p ≤ 0.02 was associated with reduced risk of overweight and obesity only among early-adolescents. Only dietary habits and eating practices within the home environment were associated with increased risk of overweight and obesity.

  9. I am AmeriBritSouthAfrican-Zambian: Multidimensional remote acculturation and well-being among urban Zambian adolescents.

    Science.gov (United States)

    Ferguson, Yuna L; Ferguson, Kim T; Ferguson, Gail M

    2017-02-01

    One impact of globalisation is that adolescents today are frequently exposed to the values, attitudes and norms of other nations without leaving their own backyards. This may lead to remote acculturation-cultural and psychological changes experienced by non-migrant individuals having indirect and/or intermittent contact with a geographically separate culture. Using quantitative and qualitative data, we examined multidimensional remote acculturation among 83 urban Zambian adolescents who are routinely exposed to U.S., U.K. and South African cultures through traditional and social media and materials/goods. Cluster analyses showed 2 distinct groups of adolescents. "Traditional Zambians, TZs" (55.4%) were significantly more oriented towards Zambian culture and reported a higher level of obligation to their families and greater interdependent self-construal compared with "Westernised Multicultural Zambians, WMZs" (44.6%), who were more oriented towards U.S., U.K. and South African cultures. Furthermore, remote acculturation predicted somewhat lower life satisfaction among WMZs. These results demonstrate that individuals' behaviours, values and identity may be influenced by multiple geographically distant cultures simultaneously and may be associated with psychological costs. © 2015 International Union of Psychological Science.

  10. Confirming the Value of Swimming-Performance Models for Adolescents.

    Science.gov (United States)

    Dormehl, Shilo J; Robertson, Samuel J; Barker, Alan R; Williams, Craig A

    2017-10-01

    To evaluate the efficacy of existing performance models to assess the progression of male and female adolescent swimmers through a quantitative and qualitative mixed-methods approach. Fourteen published models were tested using retrospective data from an independent sample of Dutch junior national-level swimmers from when they were 12-18 y of age (n = 13). The degree of association by Pearson correlations was compared between the calculated differences from the models and quadratic functions derived from the Dutch junior national qualifying times. Swimmers were grouped based on their differences from the models and compared with their swimming histories that were extracted from questionnaires and follow-up interviews. Correlations of the deviations from both the models and quadratic functions derived from the Dutch qualifying times were all significant except for the 100-m breaststroke and butterfly and the 200-m freestyle for females (P backstroke for males and 200-m freestyle for males and females were almost directly proportional. In general, deviations from the models were accounted for by the swimmers' training histories. Higher levels of retrospective motivation appeared to be synonymous with higher-level career performance. This mixed-methods approach helped confirm the validity of the models that were found to be applicable to adolescent swimmers at all levels, allowing coaches to track performance and set goals. The value of the models in being able to account for the expected performance gains during adolescence enables quantification of peripheral factors that could affect performance.

  11. a Quadtree Organization Construction and Scheduling Method for Urban 3d Model Based on Weight

    Science.gov (United States)

    Yao, C.; Peng, G.; Song, Y.; Duan, M.

    2017-09-01

    The increasement of Urban 3D model precision and data quantity puts forward higher requirements for real-time rendering of digital city model. Improving the organization, management and scheduling of 3D model data in 3D digital city can improve the rendering effect and efficiency. This paper takes the complexity of urban models into account, proposes a Quadtree construction and scheduling rendering method for Urban 3D model based on weight. Divide Urban 3D model into different rendering weights according to certain rules, perform Quadtree construction and schedule rendering according to different rendering weights. Also proposed an algorithm for extracting bounding box extraction based on model drawing primitives to generate LOD model automatically. Using the algorithm proposed in this paper, developed a 3D urban planning&management software, the practice has showed the algorithm is efficient and feasible, the render frame rate of big scene and small scene are both stable at around 25 frames.

  12. A QUADTREE ORGANIZATION CONSTRUCTION AND SCHEDULING METHOD FOR URBAN 3D MODEL BASED ON WEIGHT

    Directory of Open Access Journals (Sweden)

    C. Yao

    2017-09-01

    Full Text Available The increasement of Urban 3D model precision and data quantity puts forward higher requirements for real-time rendering of digital city model. Improving the organization, management and scheduling of 3D model data in 3D digital city can improve the rendering effect and efficiency. This paper takes the complexity of urban models into account, proposes a Quadtree construction and scheduling rendering method for Urban 3D model based on weight. Divide Urban 3D model into different rendering weights according to certain rules, perform Quadtree construction and schedule rendering according to different rendering weights. Also proposed an algorithm for extracting bounding box extraction based on model drawing primitives to generate LOD model automatically. Using the algorithm proposed in this paper, developed a 3D urban planning&management software, the practice has showed the algorithm is efficient and feasible, the render frame rate of big scene and small scene are both stable at around 25 frames.

  13. Modeling urban building energy use: A review of modeling approaches and procedures

    Energy Technology Data Exchange (ETDEWEB)

    Li, Wenliang; Zhou, Yuyu; Cetin, Kristen; Eom, Jiyong; Wang, Yu; Chen, Gang; Zhang, Xuesong

    2017-12-01

    With rapid urbanization and economic development, the world has been experiencing an unprecedented increase in energy consumption and greenhouse gas (GHG) emissions. While reducing energy consumption and GHG emissions is a common interest shared by major developed and developing countries, actions to enable these global reductions are generally implemented at the city scale. This is because baseline information from individual cities plays an important role in identifying economical options for improving building energy efficiency and reducing GHG emissions. Numerous approaches have been proposed for modeling urban building energy use in the past decades. This paper aims to provide an up-to-date review of the broad categories of energy models for urban buildings and describes the basic workflow of physics-based, bottom-up models and their applications in simulating urban-scale building energy use. Because there are significant differences across models with varied potential for application, strengths and weaknesses of the reviewed models are also presented. This is followed by a discussion of challenging issues associated with model preparation and calibration.

  14. Implementing a Generative Urban Design Model : Grammar-based design patterns for urban design

    NARCIS (Netherlands)

    Beirao, J.N.; Mendes, G.; Duarte, J.; Stouffs, R.M.F.

    2010-01-01

    This paper shows the first results of a prototype implementation of a generative urban design tool. This implementation will form part of a design support tool for a GIS based platform defined to formulate, generate and evaluate urban designs. These three goals, formulation, generation and

  15. [Simulation of urban expansion based on SLEUTH model in Fuxin City, Northeast China].

    Science.gov (United States)

    Wu, Chun-Hua; Hu, Yuan-Man; Huang, Pei-Quan

    2014-09-01

    Urban expansion was simulated by SLEUTH model based on the data of Fuxin City, Northeast China in 1997-2013. The optimal parameters of urban expansion were obtained from SLEUTH model calibration, with the diffusion coefficient as 6, breed coefficient as 64, spread coefficient as 44, slope resistance as 52 and road gravity as 90. Urban growth types in Fuxin mainly belonged to new center growth and edge growth, i.e., the further expansion of new and old urban centers. Urban expansion was greatly influenced by roads. Fuxin, as a resource-exhausted city, suffered from the natural disasters, such as landslides, subsidence, and so on. The slope resistance of urban expansion was large in the development of urban land. From the perspective of urban scale, road gravity in smaller city was greater than in larger city. The urban expansion in smaller city was more inclined to the new center growth. The locations of enterprises and new development zones were more interested in the area of good transport facilities. Meanwhile, they were inclined to new center growth. Urban expansions were simulated based on optimal parameters of SLEUTH model. The simulated result of edge growth was better than the simulated result of new spreading center growth, because new spreading center growth was susceptible to policymaking, and cellular influence was little. The simulated accuracy of urban land in 2001, 2006, 2010 and 2013 was high.

  16. Study of thermal environment in Jingjintang urban agglomeration based on WRF model and Landsat data

    International Nuclear Information System (INIS)

    Huang, Q N; Cao, Z Q; Guo, H D; Xi, X H; Li, X W

    2014-01-01

    In recent decades, unprecedented urban expansion has taken place in developing countries resulting in the emergence of megacities or urban agglomeration. It has been highly concerned by many countries about a variety of urban environmental issues such as greenhouse gas emissions and urban heat island phenomenon associated with urbanization. Generally, thermal environment is monitored by remote sensing satellite data. This method is usually limited by weather and repeated cycle. Another approach is relied on numerical simulation based on models. In the study, these two means are combined to study the thermal environment of Jingjintang urban agglomeration. The high temperature processes of the study area in 2009 and 1990s are simulated by using WRF (the Weather Research and Forecasting Model) coupled with UCM (Urban Canopy Model) and the urban impervious surface estimated from Landsat-5 TM data using support vector machine. Results show that the trend of simulated air temperature (2 meter) is in accord with observed air temperature. Moreover, it indicates the differences of air temperature and Land Surface Temperature caused by the urbanization efficiently. The UHI effect at night is stronger than that in the day. The maximum difference of LST reaches to 8–10°C for new build-up area at night. The method provided in this research can be used to analyze impacts on urban thermal environment caused by urbanization and it also provides means on thermal environment monitoring and prediction which will benefit the coping capacity of extreme event

  17. Safety modeling of urban arterials in Shanghai, China.

    Science.gov (United States)

    Wang, Xuesong; Fan, Tianxiang; Chen, Ming; Deng, Bing; Wu, Bing; Tremont, Paul

    2015-10-01

    Traffic safety on urban arterials is influenced by several key variables including geometric design features, land use, traffic volume, and travel speeds. This paper is an exploratory study of the relationship of these variables to safety. It uses a comparatively new method of measuring speeds by extracting GPS data from taxis operating on Shanghai's urban network. This GPS derived speed data, hereafter called Floating Car Data (FCD) was used to calculate average speeds during peak and off-peak hours, and was acquired from samples of 15,000+ taxis traveling on 176 segments over 18 major arterials in central Shanghai. Geometric design features of these arterials and surrounding land use characteristics were obtained by field investigation, and crash data was obtained from police reports. Bayesian inference using four different models, Poisson-lognormal (PLN), PLN with Maximum Likelihood priors (PLN-ML), hierarchical PLN (HPLN), and HPLN with Maximum Likelihood priors (HPLN-ML), was used to estimate crash frequencies. Results showed the HPLN-ML models had the best goodness-of-fit and efficiency, and models with ML priors yielded estimates with the lowest standard errors. Crash frequencies increased with increases in traffic volume. Higher average speeds were associated with higher crash frequencies during peak periods, but not during off-peak periods. Several geometric design features including average segment length of arterial, number of lanes, presence of non-motorized lanes, number of access points, and commercial land use, were positively related to crash frequencies. Copyright © 2015 Elsevier Ltd. All rights reserved.

  18. Problem gambling in adolescents: an examination of the pathways model.

    Science.gov (United States)

    Gupta, Rina; Nower, Lia; Derevensky, Jeffrey L; Blaszczynski, Alex; Faregh, Neda; Temcheff, Caroline

    2013-09-01

    This research tests the applicability of the Integrated Pathways Model for gambling to adolescent problem gamblers, utilizing a cross-sectional design and self-report questionnaires. Although the overall sample consisted of 1,133 adolescents (Quebec: n = 994, 87.7 %; Ontario: n = 139, 12.3 %: Male = 558, 49.5 %; Female = 569, 50.5 %), only problem gamblers were retained in testing the model (N = 109). Personality and clinical features were assessed using the Millon Adolescent Clinical Inventory, attention deficit hyperactivity (ADHD) using the Conners-Wells' Adolescent Self-Report Scale, and the DSM-IV-MR-J and Gambling Activities Questionnaire to determine gambling severity and reasons for gambling. Latent class analysis concluded 5 classes, yet still provided preliminary support for three distinct subgroups similar to those proposed by the Pathways Model, adding a depression only subtype, and a subtype of problem gamblers experiencing both internalizing and externalizing disorders. ADHD symptoms were found to be common to 4 of the 5 classes.

  19. Modeling urban landscape: New paradigms and challenges in territorial representation

    Directory of Open Access Journals (Sweden)

    Sheyla Aguilar de Santana

    2013-05-01

    Full Text Available This paper aims to give a brief background on the production of urban space considering the social functions of the city, the needs of contemporary urban reforms and the need for tools that assist in decision making. This state of the art about the production space justifies the current studies on the development of geoprocessing tools, techniques and methodologies that attempt the needs of creating interpretive portraits of urban landscapes to facilitate dialogue between urban technical, administrators and community. In this sense, it is presented how GIS has been working within the context of urban planning and appointed the new challenges and paradigms of territorial representation.

  20. Does Parental Monitoring Moderate the Relation between Parent-Child Communication and Pre-Coital Sexual Behaviours among Urban, Minority Early Adolescents?

    Science.gov (United States)

    Santa Maria, Diane; Markham, Christine; Swank, Paul; Baumler, Elizabeth; McCurdy, Sheryl; Tortolero, Susan

    2014-01-01

    This study examined parental monitoring (PM) as a potential moderator of the relation between parent-child communication (PCC) and pre-coital sexual behaviours (PCSB) in an urban, minority, early adolescent population. Seventh-grade students (n = 1609) reported PCC, PM and PCSB. Multivariable logistic regression was conducted to assess for…

  1. Scale effect challenges in urban hydrology highlighted with a distributed hydrological model

    OpenAIRE

    Ichiba, Abdellah; Gires, Auguste; Tchiguirinskaia, Ioulia; Schertzer, Daniel; Bompard, Philippe; ten Veldhuis, J.A.E.

    2018-01-01

    Hydrological models are extensively used in urban water management, development and evaluation of future scenarios and research activities. There is a growing interest in the development of fully distributed and grid-based models. However, some complex questions related to scale effects are not yet fully understood and still remain open issues in urban hydrology. In this paper we propose a two-step investigation framework to illustrate the extent of scale effects in urban ...

  2. An inter-model comparison of urban canopy effects on climate

    Science.gov (United States)

    Halenka, Tomas; Karlicky, Jan; Huszar, Peter; Belda, Michal; Bardachova, Tatsiana

    2017-04-01

    The role of cities is increasing and will continue to increase in future, as the population within the urban areas is growing faster, with the estimate for Europe of about 84% living in urban areas in about mid of 21st century. To assess the impact of cities and, in general, urban surfaces on climate, using of modeling approach is well appropriate. Moreover, with higher resolution, urban areas becomes to be better resolved in the regional models and their relatively significant impacts should not be neglected. Model descriptions of urban canopy related meteorological effects can, however, differ largely given the odds in the driving models, the underlying surface models and the urban canopy parameterizations, representing a certain uncertainty. In this study we try to contribute to the estimation of this uncertainty by performing numerous experiments to assess the urban canopy meteorological forcing over central Europe on climate for the decade 2001-2010, using two driving models (RegCM4 and WRF) in 10 km resolution driven by ERA-Interim reanalyses, three surface schemes (BATS and CLM4.5 for RegCM4 and Noah for WRF) and five urban canopy parameterizations available: one bulk urban scheme, three single layer and a multilayer urban scheme. Actually, in RegCM4 we used our implementation of the Single Layer Urban Canopy Model (SLUCM) in BATS scheme and CLM4.5 option with urban parameterization based on SLUCM concept as well, in WRF we used all the three options, i.e. bulk, SLUCM and more complex and sophisticated Building Environment Parameterization (BEP) connected with Building Energy Model (BEM). As a reference simulations, runs with no urban areas and with no urban parameterizations were performed. Effects of cities on urban and rural areas were evaluated. Effect of reducing diurnal temperature range in cities (around 2 °C in summer) is noticeable in all simulation, independent to urban parameterization type and model. Also well-known warmer summer city nights

  3. NE Ohio Urban Growth Monitoring and Modeling Prototype. Revised

    Science.gov (United States)

    Siebert, Loren; Klosterman, Richard E.

    2001-01-01

    At the University of Akron, Dr. Loren Siebert, Dr. Richard Klosterman, and their graduate research assistants (Jung-Wook Kim, Mohammed Hoque, Aziza Parveen, and Ben Stabler) worked on the integration of remote sensing and GIs-based planning support systems. The primary goal of the project was to develop methods that use remote sensing land cover mapping and GIs-based modeling to monitor and project urban growth and farmland loss in northeast Ohio. Another research goal has been to use only GIS data that are accessible via the World Wide Web, to determine whether Ohio's small counties and townships that do not currently have parcel-level GIS systems can apply these techniques. The project was jointly funded by NASA and USGS OhioView grants during the 2000-2001 academic year; the work is now being continued under a USGS grant.

  4. A Unified Building Model for 3D Urban GIS

    Directory of Open Access Journals (Sweden)

    Ihab Hijazi

    2012-07-01

    Full Text Available Several tasks in urban and architectural design are today undertaken in a geospatial context. Building Information Models (BIM and geospatial technologies offer 3D data models that provide information about buildings and the surrounding environment. The Industry Foundation Classes (IFC and CityGML are today the two most prominent semantic models for representation of BIM and geospatial models respectively. CityGML has emerged as a standard for modeling city models while IFC has been developed as a reference model for building objects and sites. Current CAD and geospatial software provide tools that allow the conversion of information from one format to the other. These tools are however fairly limited in their capabilities, often resulting in data and information losses in the transformations. This paper describes a new approach for data integration based on a unified building model (UBM which encapsulates both the CityGML and IFC models, thus avoiding translations between the models and loss of information. To build the UBM, all classes and related concepts were initially collected from both models, overlapping concepts were merged, new objects were created to ensure the capturing of both indoor and outdoor objects, and finally, spatial relationships between the objects were redefined. Unified Modeling Language (UML notations were used for representing its objects and relationships between them. There are two use-case scenarios, both set in a hospital: “evacuation” and “allocating spaces for patient wards” were developed to validate and test the proposed UBM data model. Based on these two scenarios, four validation queries were defined in order to validate the appropriateness of the proposed unified building model. It has been validated, through the case scenarios and four queries, that the UBM being developed is able to integrate CityGML data as well as IFC data in an apparently seamless way. Constraints and enrichment functions are

  5. An Integrated Modeling Approach Combining Multifractal Urban Planning with a Space Syntax Perspective

    Directory of Open Access Journals (Sweden)

    Claudia Yamu

    2017-12-01

    Full Text Available The United Nations Paris agreement of 2015 highlighted the need for urban planning to prevent and contain urban sprawl so as to reduce trip lengths through an efficient distribution of agglomerations and a well-balanced urban pattern distribution, all while considering travel behavior and accessibility to green areas, services, and facilities on different temporal scales. For the Vienna-Bratislava metropolitan region, our integrated modeling approach uses a combination of multifractal spatial modeling along with a space syntax perspective. Multifractal strategies are intrinsically multiscalar and adhere to five planning principles: hierarchical (polycentric urban development to manage urban sprawl; sustainable transit-oriented development; locally well-balanced urban pattern and functions distribution to enhance vital urban systems, local centers, and neighborhoods; penetration of green areas into built-up areas; and the preservation of large interconnected networks of green areas to conserve biodiversity. Adding space syntax modeling to a multifractal strategy integrates how space relates to functional patterns based on centrality, thus applying a socio-spatial perspective. In this paper, we used the following workflow for an integrated modeling approach: (1 Space syntax to identify the urban systems’ hierarchy and so determine a spatial strategy regionally; (2 Fractalopolis to create a multifractal development plan for potential urbanization; and (3 Space syntax to design a strategic urban master plan for locating new housing and facilities vis-à-vis socioeconomic factors.

  6. Hourly Water Quality Dynamics in Rivers Downstream of Urban Areas: Quantifying Seasonal Variation and Modelling Impacts of Urban Growth

    Science.gov (United States)

    Hutchins, M.; McGrane, S. J.; Miller, J. D.; Hitt, O.; Bowes, M.

    2016-12-01

    Continuous monitoring of water flows and quality is invaluable in improving understanding of the influence of urban areas on river health. When used to inform predictive modelling, insights can be gained as to how urban growth may affect the chemical and biological quality of rivers as they flow downstream into larger waterbodies. Water flow and quality monitoring in two urbanising sub-catchments (urban cover varied across a range of 7-78%. A rural-urban gradient in DO was apparent in the low flow period prior to the storms. Transient low DO (pollutant first flushes was particularly apparent in urban streams but this was followed by a rapid recovery. Chronic effects lasting for three to four weeks were only seen downstream of a sewage treatment works (STW). In this respect temperature- and respiration-driven DO sags in summer were at least if not more severe than those driven by the winter storms. Likewise, although winter storm NH4 concentrations violated EU legislation downstream of the STW, they were lower than summer concentrations in pollutant flushes following dry spells. In contrast the predominant phenomenon affecting water quality in the Cut during the storms was dilution. Here, a river water quality model was calibrated and applied over the course of a year to capture the importance of periphyton photosynthesis and respiration cycles in determining water quality and to predict the influence of hypothetical urban growth on downstream river health. The periods monitored intensively, dry spells followed by prolonged rainfall, represent: (i) marked changes in conditions likely to become more prevalent in future, (ii) situations under which water quality in urban areas is likely to be particularly vulnerable, being influenced for example by first flush effects followed by capacity exceedance at STW. Despite this, whilst being somewhat long lasting in places, impacts on DO were not severe.

  7. [Risky alcohol consumption and associated factors in adolescents aged 15 to 16 years in Central Catalonia (Spain): differences between rural and urban areas].

    Science.gov (United States)

    Obradors-Rial, Núria; Ariza, Carles; Muntaner, Carles

    2014-01-01

    To determine the prevalence of risky alcohol consumption and associated risk factors among adolescents living in Central Catalonia (Spain) during the 2011-2012 academic year, depending on their area of residence. A cross-sectional study was carried out in a sample of 1268 10th grade students (4th grade of secondary education) in Central Catalonia. Risky alcohol consumption was higher among adolescents in rural areas than in urban areas (59.6% versus 49.8%). Associated risk factors were drunkenness in siblings and friends, having positive expectations of alcohol consumption, and buying alcohol. Not living with both parents and poorer academic achievement were associated risk factors in rural areas, while higher socioeconomic status was a risk factor in urban areas. Risky alcohol consumption was much higher among adolescents living in rural areas. The main associated factor was alcohol consumption among family and friends. Copyright © 2013 SESPAS. Published by Elsevier Espana. All rights reserved.

  8. Motivaciones para el consumo de tabaco entre los adolescentes de un instituto urbano Motivations for tobacco consumption among adolescents in an urban high school

    Directory of Open Access Journals (Sweden)

    Alejandro Pérez-Milena

    2012-02-01

    consumption among adolescents. Methods: This study was based on qualitative methodology using six 50-minute discussion groups with 6-8 adolescents per group during the 2008/09 school year. Purposive sampling was performed of 12-18 year-old adolescents attending a middle-class urban school (Jaén, Spain. The sample was stratified by educational level as the homogeneity criterion and gender and tobacco consumption as the heterogeneity criterion. Content analysis consisted of coding, triangulation of categories and obtaining and verifying the results. Results: There were 44 adolescents (54% male. The participants reported that smoking relaxed and improved self-image, providing security (boys and improving relations with the opposite sex, as well as weight control (girls. The family encouraged smoking by providing a model to imitate, although many adolescents hid their smoking from their families. Friends constituted a pressure group to start or continue smoking. Starting secondary school marked the beginning of experimental use. Society tended to accept consumption and buying tobacco was easy for minors. University students were a role model and were free to smoke. The adolescents looked to their parents and educators/health workers to provide a model of abstinence and reported that they were well informed but only remembered powerful messages. Participants unanimously indicated that tobacco causes addiction, but in proportion to the duration of consumption, and were concerned only with the immediate symptoms caused by smoking. Teenage smokers associated multiple drug use with leisure time. Conclusions: This study provides useful data on motivation that could be used to improve smoking prevention interventions among adolescents. The most important factors seem to be peer influence, parental attitudes, easy access to tobacco and symptoms of dependence.

  9. EMMA model: an advanced operational mesoscale air quality model for urban and regional environments

    International Nuclear Information System (INIS)

    Jose, R.S.; Rodriguez, M.A.; Cortes, E.; Gonzalez, R.M.

    1999-01-01

    Mesoscale air quality models are an important tool to forecast and analyse the air quality in regional and urban areas. In recent years an increased interest has been shown by decision makers in these types of software tools. The complexity of such a model has grown exponentially with the increase of computer power. Nowadays, medium workstations can run operational versions of these modelling systems successfully. Presents a complex mesoscale air quality model which has been installed in the Environmental Office of the Madrid community (Spain) in order to forecast accurately the ozone, nitrogen dioxide and sulphur dioxide air concentrations in a 3D domain centred on Madrid city. Describes the challenging scientific matters to be solved in order to develop an operational version of the atmospheric mesoscale numerical pollution model for urban and regional areas (ANA). Some encouraging results have been achieved in the attempts to improve the accuracy of the predictions made by the version already installed. (Author)

  10. Biosocial models of adolescent problem behavior: extension to panel design.

    Science.gov (United States)

    Drigotas, S M; Udry, J R

    1993-01-01

    We extended the biosocial model of problem behavior tested by Udry (1990) to a panel design, following a sample of over one hundred boys in adolescence for three years. We found the expected results for sociological variables, but weaker effects for testosterone than Udry found on cross-sectional data. Using panel models with lagged hormone effects, we identified relationships between Time-1 testosterone and problem behavior one year or more later. The relationship between testosterone and problem behavior was not present for subsequent measures of testosterone, either in cross-section or with time-lagged models. Therefore we cannot interpret the results as showing testosterone effects on problem behavior. Rather it appears that testosterone level in early adolescence is a marker for a more general growth trajectory of early development.

  11. A spatial multi-objective optimization model for sustainable urban wastewater system layout planning.

    Science.gov (United States)

    Dong, X; Zeng, S; Chen, J

    2012-01-01

    Design of a sustainable city has changed the traditional centralized urban wastewater system towards a decentralized or clustering one. Note that there is considerable spatial variability of the factors that affect urban drainage performance including urban catchment characteristics. The potential options are numerous for planning the layout of an urban wastewater system, which are associated with different costs and local environmental impacts. There is thus a need to develop an approach to find the optimal spatial layout for collecting, treating, reusing and discharging the municipal wastewater of a city. In this study, a spatial multi-objective optimization model, called Urban wastewateR system Layout model (URL), was developed. It is solved by a genetic algorithm embedding Monte Carlo sampling and a series of graph algorithms. This model was illustrated by a case study in a newly developing urban area in Beijing, China. Five optimized system layouts were recommended to the local municipality for further detailed design.

  12. Effects of model schematisation, geometry and parameter values on urban flood modelling.

    Science.gov (United States)

    Vojinovic, Z; Seyoum, S D; Mwalwaka, J M; Price, R K

    2011-01-01

    One-dimensional (1D) hydrodynamic models have been used as a standard industry practice for urban flood modelling work for many years. More recently, however, model formulations have included a 1D representation of the main channels and a 2D representation of the floodplains. Since the physical process of describing exchanges of flows with the floodplains can be represented in different ways, the predictive capability of different modelling approaches can also vary. The present paper explores effects of some of the issues that concern urban flood modelling work. Impacts from applying different model schematisation, geometry and parameter values were investigated. The study has mainly focussed on exploring how different Digital Terrain Model (DTM) resolution, presence of different features on DTM such as roads and building structures and different friction coefficients affect the simulation results. Practical implications of these issues are analysed and illustrated in a case study from St Maarten, N.A. The results from this study aim to provide users of numerical models with information that can be used in the analyses of flooding processes in urban areas.

  13. Spatio-temporal landscape modeling of urban growth patterns in Dhanbad Urban Agglomeration, India using geoinformatics techniques

    Directory of Open Access Journals (Sweden)

    Kanhaiya Lal

    2017-06-01

    Full Text Available The study deals with the quantification of urban sprawl and land transformation of Dhanbad Urban Agglomeration (DUA using geoinformatics and gradient modeling during last four decades (1972–2011. Various multi-temporal satellite images viz., MSS (1972, ETM+ (1999, 2011 and digital elevation model (CARTOSAT I, 2006 were used to analyse the urban expansion, land transformation, growth directions, and spatial segregations within the urban landscape to develop an understanding the nature of built-up growth in DUA. The urban area increased from 10.33 km2 to 46.70 km2 (352.08% along with high rate of population growth (160.07% during 1972–2011 exhibiting population densification in DUA. The study reveals that coal mining based city faced significant land use transformation converting vegetation (−41.33% into built-up land (352.08% exhibiting loss of productive lands for the expansion of impervious surface. The per year urban growth exhibited increasing urban growth from 0.4 km2/year to 1.51 km2/year during 1972–1999 and 1999–2011 periods with overall growth of 332.73%. The built-up growth on varied elevation zones exhibits that the elevation zones 150–200 m is the most preferred (79.01% for urban development with high growth (541.74%. The gradient modeling represents that the percentage of land (built-up gradually increased from 3.48% to 15.74% during 1972–2011. The result exhibited that the major growth took place in south-west direction followed by south direction in haphazard manner during 1971–99 period, whereas predominant built-up development was observed in north, south and south-west direction during 1999–2011 period, majorly within the municipal limits. The study provides an analytical method to evaluate the built-up growth patterns of an urban milieu combining geoinformatics and landscape matrix. The built-up growth in DUA indicates urgent imposition of building bylaws along with zoning (land use, height and density

  14. Variation in pediatric and adolescent firearm mortality rates in rural and urban US counties.

    Science.gov (United States)

    Nance, Michael L; Carr, Brendan G; Kallan, Michael J; Branas, Charles C; Wiebe, Douglas J

    2010-06-01

    We examined whether firearm mortality rates among children varied across US counties along a rural-urban continuum. US vital statistics data were accessed for all pediatric (age: 0-19 years) firearm deaths from 1999 through 2006. Deaths were analyzed according to a modified rural-urban continuum code (based on population size and proximity to metropolitan areas) assigned to each county (3141 counties). In the 8-year study period, there were 23649 pediatric firearm deaths (15190 homicides, 7082 suicides, and 1377 unintentional deaths). Pediatric nonfirearm mortality rates were significantly higher in the most-rural counties (adjusted rate ratio: 1.36 [95% confidence interval [CI]: 1.13-1.64]), compared with the most-urban counties. The most-rural counties demonstrated virtually identical pediatric firearm mortality rates (adjusted rate ratio: 0.91 [95% CI: 0.63-1.32]), compared with the most-urban counties. The most-rural counties had higher rates of pediatric firearm suicide (adjusted rate ratio: 2.01 [95% CI: 1.43-2.83]) and unintentional firearm death (adjusted rate ratio: 2.19 [95% CI: 1.27-3.77]), compared with the most-urban counties. Pediatric firearm homicides rates were significantly higher in the most-urban counties (adjusted rate ratio: 3.69 [95% CI: 2.00-6.80]), compared with the most-rural counties. Children in the most-rural US counties had firearm mortality rates that were statistically indistinguishable from those for children in the most-urban counties. This finding reflects a greater homicide rate in urban counties counterbalanced by greater suicide and unintentional firearm death rates in rural counties. Nonfirearm mortality rates were significantly greater outside the most-urban US counties.

  15. Prevalence and Health Impact of Intimate Partner Violence and Non-partner Sexual Violence Among Female Adolescents Aged 15-19 Years in Vulnerable Urban Environments: A Multi-Country Study.

    Science.gov (United States)

    Decker, Michele R; Peitzmeier, Sarah; Olumide, Adesola; Acharya, Rajib; Ojengbede, Oladosu; Covarrubias, Laura; Gao, Ersheng; Cheng, Yan; Delany-Moretlwe, Sinead; Brahmbhatt, Heena

    2014-12-01

    Globally, adolescent women are at risk for gender-based violence (GBV) including sexual violence and intimate partner violence (IPV). Those in economically distressed settings are considered uniquely vulnerable. Female adolescents aged 15-19 from Baltimore, Maryland, USA; New Delhi, India; Ibadan, Nigeria; Johannesburg, South Africa; and Shanghai, China (n = 1,112) were recruited via respondent-driven sampling to participate in a cross-sectional survey. We describe the prevalence of past-year physical and sexual IPV, and lifetime and past-year non-partner sexual violence. Logistic regression models evaluated associations of GBV with substance use, sexual and reproductive health, mental health, and self-rated health. Among ever-partnered women, past-year IPV prevalence ranged from 10.2% in Shanghai to 36.6% in Johannesburg. Lifetime non-partner sexual violence ranged from 1.2% in Shanghai to 12.6% in Johannesburg. Where sufficient cases allowed additional analyses (Baltimore and Johannesburg), both IPV and non-partner sexual violence were associated with poor health across domains of substance use, sexual and reproductive health, mental health, and self-rated health; associations varied across study sites. Significant heterogeneity was observed in the prevalence of IPV and non-partner sexual violence among adolescent women in economically distressed urban settings, with upwards of 25% of ever-partnered women experiencing past-year IPV in Baltimore, Ibadan, and Johannesburg, and more than 10% of adolescent women in Baltimore and Johannesburg reporting non-partner sexual violence. Findings affirm the negative health influence of GBV even in disadvantaged urban settings that present a range of competing health threats. A multisectoral response is needed to prevent GBV against young women, mitigate its health impact, and hold perpetrators accountable. Copyright © 2014 Society for Adolescent Health and Medicine. Published by Elsevier Inc. All rights reserved.

  16. Emotional abuse in a sample of multiply maltreated, urban young adolescents: issues of definition and identification.

    Science.gov (United States)

    Trickett, Penelope K; Mennen, Ferol E; Kim, Kihyun; Sang, Jina

    2009-01-01

    The main purpose of this paper is to use the Brassard and Donovan [Brassard, M. R. & Donovan, K. L. (2006). Defining psychological maltreatment. In M. M. Freerick, J. F. Knutson, P. K. Trickett, & S. M. Flanzer (Eds.), Child abuse and neglect: Definitions, classifications, and a framework for research (pp. 151-197). Baltimore, MD: Paul H. Brookers Publishing Co., Inc.] framework to examine and describe the nature of emotional abuse experienced by a sample of urban, ethnically diverse male and female youth (N=303) identified as maltreated by a very large public child welfare agency. Case record abstraction was conducted on the DCFS records of these maltreated youth using the Maltreatment Case Record Abstraction Instrument (MCRAI) which was based on the work of Barnett et al. [Barnett, D., Manly, J. T., & Cicchetti, D. (1993). Defining child maltreatment: The interface between policy and research. In D. Cicchetti & S. L. Toth (Eds.), Advances in applied developmental psychology: Child abuse, child development and social policy (pp. 7-73). Norwood, NJ: Ablex Publishing Corp.] as modified by English and LONGSCAN [English, D. J., & the LONGSCAN Investigators. (1997). Modified maltreatment classification system (MMCS). Retrieved from http://www.iprc.unc.edu/longscan/]. Fifteen items of parental behavior deemed emotionally abusive were coded and organized into four subtypes of emotional abuse (spurning, terrorizing, isolating, exploiting/corrupting) using the Brassard and Donovan (2006) framework. Using this coding system, almost 50% of the sample were found to have experienced emotional abuse in contrast to 9% identified at the time of referral by DCFS. Most of the emotionally abused youth also experienced physical abuse (63%) and/or neglect (76%) as well. The most frequent subtype of emotional abuse experienced was terrorizing. Most youth experienced more than one subtype. Emotional abuse, while frequent, was seldom the focus of the child protection services

  17. Modelling atmospheric deposition flux of Cadmium and Lead in urban areas

    International Nuclear Information System (INIS)

    Cherin, Nicolas

    2017-01-01

    According to WHO, air pollution is responsible for more than 3.7 million premature deaths each year (OMS, 2014). Moreover, among these deaths, more than 70 within urban areas. Consequently, the health and environmental impacts of pollutants within these urban areas are of great concern in air quality studies. The deposition fluxes of air pollutants, which can be significant near sources of pollution, have rarely been modeled within urban areas. Historically, atmospheric deposition studies have focused mostly on remote areas to assess the potential impacts on ecosystems of acid deposition and nitrogen loading. Therefore, current atmospheric deposition models may not be suitable to simulate deposition fluxes in urban areas, which include complex surface geometries and diverse land use types. Atmospheric dry deposition is typically modeled using an average roughness length, which depends on land use. This classical roughness-length approach cannot account for the spatial variability of dry deposition in complex settings such as urban areas. Urban canopy models have been developed to parameterize momentum and heat transfer. We extend this approach here to mass transfer, and a new dry deposition model based on the urban canyon concept is presented. It uses a local mixing-length parameterization of turbulence within the canopy, and a description of the urban canopy via key parameters to provide spatially distributed dry deposition fluxes. This approach provides spatially distributed dry deposition fluxes depending on surfaces (streets, walls, roofs) and flow regimes (recirculation and ventilation) within the urban area. (author) [fr

  18. Towards integrating a model of urban socioeconomic structure and urban imagery

    OpenAIRE

    A N Spector

    1982-01-01

    In this paper a link is made between variations in socioeconomic characteristics of urban residents and the understanding of spatial relationships in an urban landscape. It is contended that the development of activity spaces and the understanding of space and place are tied to the social, political and economic organization of a social formation. Although some of the arguments posed here parallel recent works on space - time geography, it is argued that these could be usefully augmented with...

  19. keep your models up-to-date: connecting community mapping data to complex urban flood modelling

    Science.gov (United States)

    Winsemius, Hessel; Eilander, Dirk; Ward, Philip; Diaz Loaiza, Andres; Iliffe, Mark; Mawanda, Shaban; Luo, Tianyi; Kimacha, Nyambiri; Chen, Jorik

    2017-04-01

    The world is urbanizing rapidly. According to the United Nation's World Urbanization Prospect, 50% of the global population already lives in urban areas today. This number is expected to grow to 66% by 2050. The rapid changes in these urban environments go hand in hand with rapid changes in natural hazard risks, in particular in informal unplanned neighbourhoods. In Dar Es Salaam - Tanzania, flood risk dominates and given the rapid changes in the city, continuous updates of detailed street level hazard and risk mapping are needed to adequately support decision making for urban planning, infrastructure design and disaster response. Over the past years, the Ramani Huria and Zuia Mafuriko projects have mapped the most flood prone neighbourhoods, including roads, buildings, drainage and land use and contributed data to the open-source OpenStreetMap database. In this contribution, we will demonstrate how we mobilize these contributed data to establish dynamic flood models for Dar Es Salaam and keep these up-to-date by making a direct link between the data, and model schematization. The tools automatically establish a sound 1D drainage network as well as a high resolution terrain dataset, by fusing the OpenStreetMap data with existing lower resolution terrain data such as the globally available satellite based SRTM 30. It then translates these fully automatically into the inputs required for the D-HYDRO modeling suite. Our tools are built such that community and stakeholder knowledge can be included in the model details through workshops with the tools so that missing essential information about the city's details can be augmented on-the-fly. This process creates a continuous dialogue between members of the community that collect data, and stakeholders requiring data for flood models. Moreover, used taxonomy and data filtering can be configured to conditions in other cities, making the tools generic and scalable. The tools are made available open-source.

  20. [Research on the behavior of fruit and vegetable intake in adolescents with Transtheoretical Model].

    Science.gov (United States)

    Mao, Chen-Jia; Xu, Liang-Wen; Qu, Xu-Ping; Yang, Qi-Fa; Hu, Han-Qiong; Xu, Dong-Ming

    2010-05-01

    To study the current situation and factors influencing the behavior of fruit and vegetable intake in adolescents, and to discuss health education strategy related to the behavior. 1677 students were selected from primary school and middle school in urban area of Hangzhou by a multistage sampling method. The behavior of fruit and vegetable intake was surveyed by questionnaires of the patient-centered assessment and counseling for exercise plus nutrition project (PACE+) for adolescent-scale of fruit and vegetable consumption, and analyzed by Transtheoretical Model on the servings of intake, the stage of change, process of change, decisional balance and the current status of self-efficacy. The average intake of fruit and vegetable in adolescents was (3.21 +/- 1.50) servings per day ("one serving" means 100 g cooked vegetable or 100 g fruit). The behavior of consuming fruit and vegetable in most of the adolescents was in the contemplation stage, accounting for 36.91% (619/1677). The process of behavior change, decisional balance (Pros) and self-efficacy existed a positive correlation with the process of stage (r(process) = 0.38, r(decisional balance (Pros)) = 0.26, r(self-efficacy) = 0.33, t values were 16.78, 11.02 and 14.31, P < 0.05). The servings of fruit and vegetable intake existed a positive correlation with stage transition and self-efficacy (beta(stage transition) = 0.665, t = 35.07, P < 0.05; beta(self-efficacy) = 0.050, t = 2.63, P < 0.05), and existed a negative correlation with decisional balance (Cons) (beta(decisional balance (Cons)) = -0.051, t = -2.84, P < 0.05). Fruit and vegetable intake of these adolescents are under the recommended dietary intake. Along with behavior stage development and self-efficacy improvement, the intake of fruit and vegetable also increased correspondingly. Intervention strategies should aim at improving the awareness of adolescents on the health benefits of fruit and vegetable intake and promoting their confidence to reach

  1. A new methodology for modelling of health risk from urban flooding exemplified by cholera

    DEFF Research Database (Denmark)

    Mark, Ole; Jørgensen, Claus; Hammond, Michael

    2016-01-01

    an option for reducing the burden of disease in the population by use of intelligent urban flood risk management. The model linking urban flooding and health risk is applied to Dhaka City in Bangladesh, where waterborne diseases including cholera are endemic. The application to Dhaka City is supported...... by measurements of pathogens in the urban drainage system. The outcome of the application indicates that direct contact with polluted flood water is a plausible route of primary transmission of cholera and demonstrates the applicability and the potential for linking urban flood models with QMRA in order...

  2. Impact of an improved WRF urban canopy model on diurnal air temperature simulation over northern Taiwan

    Directory of Open Access Journals (Sweden)

    C.-Y. Lin

    2016-02-01

    Full Text Available This study evaluates the impact of urbanization over northern Taiwan using the Weather Research and Forecasting (WRF Model coupled with the Noah land-surface model and a modified urban canopy model (WRF–UCM2D. In the original UCM coupled to WRF (WRF–UCM, when the land use in the model grid is identified as "urban", the urban fraction value is fixed. Similarly, the UCM assumes the distribution of anthropogenic heat (AH to be constant. This may not only lead to over- or underestimation of urban fraction and AH in urban and non-urban areas, but spatial variation also affects the model-estimated temperature. To overcome the abovementioned limitations and to improve the performance of the original UCM model, WRF–UCM is modified to consider the 2-D urban fraction and AH (WRF–UCM2D.The two models were found to have comparable temperature simulation performance for urban areas, but large differences in simulated results were observed for non-urban areas, especially at nighttime. WRF–UCM2D yielded a higher correlation coefficient (R2 than WRF–UCM (0.72 vs. 0.48, respectively, while bias and RMSE achieved by WRF–UCM2D were both significantly smaller than those attained by WRF–UCM (0.27 and 1.27 vs. 1.12 and 1.89, respectively. In other words, the improved model not only enhanced correlation but also reduced bias and RMSE for the nighttime data of non-urban areas. WRF–UCM2D performed much better than WRF–UCM at non-urban stations with a low urban fraction during nighttime. The improved simulation performance of WRF–UCM2D in non-urban areas is attributed to the energy exchange which enables efficient turbulence mixing at a low urban fraction. The result of this study has a crucial implication for assessing the impacts of urbanization on air quality and regional climate.

  3. Persistent Monitoring of Urban Infrasound Phenomenology. Report 1: Modeling an Urban Environment for Acoustical Analyses using the 3-D Finite-Difference Time-Domain Program PSTOP3D

    Science.gov (United States)

    2015-08-01

    ER D C TR -1 5- 5 Remote Assessment of Critical Infrastructure Persistent Monitoring of Urban Infrasound Phenomenology Report 1...ERDC TR-15-5 August 2015 Persistent Monitoring of Urban Infrasound Phenomenology Report 1: Modeling an Urban Environment for Acoustical Analyses...From - To) 4. TITLE AND SUBTITLE Persistent Monitoring of Urban Infrasound Phenomenology ; Report 1: Modeling an Urban Environment for

  4. Etiological model of disordered eating behaviors in Brazilian adolescent girls.

    Science.gov (United States)

    Fortes, Leonardo de Sousa; Filgueiras, Juliana Fernandes; Oliveira, Fernanda da Costa; Almeida, Sebastião Sousa; Ferreira, Maria Elisa Caputo

    2016-01-01

    The objective was to construct an etiological model of disordered eating behaviors in Brazilian adolescent girls. A total of 1,358 adolescent girls from four cities participated. The study used psychometric scales to assess disordered eating behaviors, body dissatisfaction, media pressure, self-esteem, mood, depressive symptoms, and perfectionism. Weight, height, and skinfolds were measured to calculate body mass index (BMI) and percent body fat (%F). Structural equation modeling explained 76% of variance in disordered eating behaviors (F(9, 1,351) = 74.50; p = 0.001). The findings indicate that body dissatisfaction mediated the relationship between media pressures, self-esteem, mood, BMI, %F, and disordered eating behaviors (F(9, 1,351) = 59.89; p = 0.001). Although depressive symptoms were not related to body dissatisfaction, the model indicated a direct relationship with disordered eating behaviors (F(2, 1,356) = 23.98; p = 0.001). In conclusion, only perfectionism failed to fit the etiological model of disordered eating behaviors in Brazilian adolescent girls.

  5. Family rigidity, adolescent problem-solving deficits, and suicidal ideation: a mediational model.

    Science.gov (United States)

    Carris, M J; Sheeber, L; Howe, S

    1998-08-01

    Family rigidity and adolescent problem-solving deficits have each been linked to adolescent suicidal behaviors. The objective of the present study was to evaluate the hypothesis that family rigidity has primarily an indirect effect on adolescent suicidal ideation through its effect on adolescent problem-solving deficits. College students and their parents completed the Family Adaptability and Cohesion Evaluation Scale II. Students also completed the Problem-Solving Inventory and the Adult Suicidal ideation Questionnaire. Structural equation models confirmed that family rigidity has an indirect effect on adolescent suicidal ideation through its effect on adolescent problem-solving deficits. Directions for treatment efforts are discussed.

  6. Investigation of a coupling model of coordination between urbanization and the environment.

    Science.gov (United States)

    Li, Yangfan; Li, Yi; Zhou, Yan; Shi, Yalou; Zhu, Xiaodong

    2012-05-15

    China's coastal cities are experiencing rapid urbanization, which has resulted in many challenges. This paper presents a comprehensive index system for assessment of the level of urbanization based on four aspects: demographic urbanization, economic urbanization, social urbanization and spatial urbanization. The developed index system also characterizes the environment based on three factors: environmental pressure, environmental level and environmental control. Furthermore, a coupling coordination degree model (CCDM) focusing on the degree of coordination between urbanization and the environment was established using panel data collected from 2000 to 2008 for Lianyungang, China. The results showed that: (1) the dynamic of coordination between urbanization and the environment showed a U-shaped curve, and both sub-systems evolved into a superior balance during rapid urbanization; (2) social urbanization and environmental control make the greatest contribution to the coupling system, indicating that they are the critical factors to consider when adjusting coordination development during decision-making; and (3) the two parameters (α-urbanization, β-environment) that have been widely used in previous studies had less of an effect on the coupling coordinated system than the other factors considered herein. Copyright © 2012 Elsevier Ltd. All rights reserved.

  7. A spatially distributed model for assessment of the effects of changing land use and climate on urban stream quality: Development of a Spatially Distributed Urban Water Quality Model

    Energy Technology Data Exchange (ETDEWEB)

    Sun, Ning [Department of Civil and Environmental Engineering, University of Washington, Seattle WA USA; Pacific Northwest National Laboratory, Richland WA USA; Yearsley, John [Department of Civil and Environmental Engineering, University of Washington, Seattle WA USA; Baptiste, Marisa [Department of Civil and Environmental Engineering, University of Washington, Seattle WA USA; Cao, Qian [Department of Geography, University of California Los Angeles, Los Angeles CA USA; Lettenmaier, Dennis P. [Department of Geography, University of California Los Angeles, Los Angeles CA USA; Nijssen, Bart [Department of Civil and Environmental Engineering, University of Washington, Seattle WA USA

    2016-08-22

    While the effects of land use change in urban areas have been widely examined, the combined effects of climate and land use change on the quality of urban and urbanizing streams have received much less attention. We describe a modeling framework that is applicable to the evaluation of potential changes in urban water quality and associated hydrologic changes in response to ongoing climate and landscape alteration. The grid-based spatially distributed model, DHSVM-WQ, is an outgrowth of the Distributed Hydrology-Soil-Vegetation Model (DHSVM) that incorporates modules for assessing hydrology and water quality in urbanized watersheds at a high spatial and temporal resolution. DHSVM-WQ simulates surface runoff quality and in-stream processes that control the transport of nonpoint-source (NPS) pollutants into urban streams. We configure DHSVM-WQ for three partially urbanized catchments in the Puget Sound region to evaluate the water quality responses to current conditions and projected changes in climate and/or land use over the next century. Here we focus on total suspended solids (TSS) and total phosphorus (TP) from nonpoint sources (runoff), as well as stream temperature. The projection of future land use is characterized by a combination of densification in existing urban or partially urban areas, and expansion of the urban footprint. The climate change scenarios consist of individual and concurrent changes in temperature and precipitation. Future precipitation is projected to increase in winter and decrease in summer, while future temperature is projected to increase throughout the year. Our results show that urbanization has a much greater effect than climate change on both the magnitude and seasonal variability of streamflow, TSS and TP loads largely due to substantially increased streamflow, and particularly winter flow peaks. Water temperature is more sensitive to climate warming scenarios than to urbanization and precipitation changes. Future urbanization and

  8. Development of river flood model in lower reach of urbanized river basin

    Science.gov (United States)

    Yoshimura, Kouhei; Tajima, Yoshimitsu; Sanuki, Hiroshi; Shibuo, Yoshihiro; Sato, Shinji; Lee, SungAe; Furumai, Hiroaki; Koike, Toshio

    2014-05-01

    Japan, with its natural mountainous landscape, has demographic feature that population is concentrated in lower reach of elevation close to the coast, and therefore flood damage with large socio-economic value tends to occur in low-lying region. Modeling of river flood in such low-lying urbanized river basin is complex due to the following reasons. In upstream it has been experienced urbanization, which changed land covers from natural forest or agricultural fields to residential or industrial area. Hence rate of infiltration and runoff are quite different from natural hydrological settings. In downstream, paved covers and construct of sewerage system in urbanized areas affect direct discharges and it enhances higher and faster flood peak arrival. Also tidal effect from river mouth strongly affects water levels in rivers, which must be taken into account. We develop an integrated river flood model in lower reach of urbanized areas to be able to address above described complex feature, by integrating model components: LSM coupled distributed hydrological model that models anthropogenic influence on river discharges to downstream; urban hydrological model that simulates run off response in urbanized areas; Saint Venant's equation approximated river model that integrates upstream and urban hydrological models with considering tidal effect from downstream. These features are integrated in a common modeling framework so that model interaction can be directly performed. The model is applied to the Tsurumi river basin, urbanized low-lying river basin in Yokohama and model results show that it can simulate water levels in rivers with acceptable model errors. Furthermore the model is able to install miscellaneous water planning constructs, such as runoff reduction pond in urbanized area, flood control field along the river channel, levee, etc. This can be a useful tool to investigate cost performance of hypothetical water management plan against impact of climate change in

  9. Modelling of the Annual Mean Urban Heat Island Pattern for Planning of Representative Urban Climate Station Network

    Directory of Open Access Journals (Sweden)

    János Unger

    2011-01-01

    Full Text Available The spatial distribution of the annual mean urban heat island (UHI intensity pattern was analysed for the medium-sized city Novi Sad, Serbia, located on the low and flat Great Hungarian Plain. The UHI pattern was determined by an empirical modelling method developed by (Balázs et al. 2009. This method was based on datasets from urban areas of Szeged and Debrecen (Hungary. The urban study area in Novi Sad (60 km2 was established as a grid network of 240 cells (0.5 km ×0.5 km. A Landsat satellite image (from June 2006 was used in order to evaluate normalized difference vegetation index and built-up ratio by cells. The pattern of the obtained UHI intensity values show concentric-like shapes when drawn as isotherms, mostly increase from the suburbs towards the inner urban areas. Results of this thermal pattern and determination of one of the local climate classification systems were used for recommending 10 locations for representative stations of an urban climate network in Novi Sad.

  10. Long-term consequences of adolescent parenthood among African American urban youth: A propensity matching approach

    Science.gov (United States)

    Assini-Meytin, Luciana C.; Green, Kerry M.

    2015-01-01

    Purpose To improve understanding of long-term socioeconomic consequences of teen parenting for men and women. Methods Analysis is based on the Woodlawn Study, a longitudinal study of an African American cohort from a socially disadvantaged community in Chicago; data were collected at childhood (N=1,242), adolescence (N=705), young adulthood (age 32, N=952), and midlife (age 42, N=833). This analysis focused on the 1050 individuals with data on teen parenting. We used propensity score matching to account for differences in background characteristics between teenage parents and their peers and multiple imputation to account for differential attrition. Results The regression models on matched samples showed that at age 32, in comparison to non-teen mothers, teenage mothers were more likely to be unemployed, live in poverty, depend on welfare, and have earned a GED or completed high school compared to finishing college. At age 32, teen fathers were more likely to be without a job compared to non-teen fathers. At age 42, the effect of teen parenting for women remained statistically significant for education and income. There were no significant associations between teen parenting and outcomes for men at age 42. Conclusions Socioeconomic consequences of teenage parenting among African Americans from disadvantaged background seem to be primarily concentrated in women and persist throughout adulthood. In addition to promoting the delay of parenting after the teenage years, it is critical to provide programs at early stages in the life course to mitigate the negative socioeconomic consequences of teenage motherhood as effects for women are broad. PMID:25769478

  11. Media devices, family relationships and sleep patterns among adolescents in an urban area.

    Science.gov (United States)

    Continente, Xavier; Pérez, Anna; Espelt, Albert; López, Maria José

    2017-04-01

    This study aimed to describe sleep patterns and to examine the association between short sleep time and family relationships and the availability of media devices among adolescents. A cross-sectional study based on a self-reported questionnaire was performed among a representative sample of adolescents (13-19 years old) enrolled during the 2011-2012 academic year in high schools in Barcelona, Spain. Adolescents reported sleep patterns and family-related variables such as family relationships, the availability of media devices in the bedroom, and watching television at dinner. Sleep time was then calculated from sleep patterns. Multivariate Poisson regression analyses with robust variance were conducted to determine the association between short sleep time (media device (television, console, or computer) in their bedroom. Adolescents with a computer in their bedroom and with poorer family relationships were more likely to be short sleepers. In boys, frequently watching TV at dinner and living in a disorganized family were also associated with short sleep time. There is a high prevalence of short sleepers. Media availability, media use and family relationships should be considered in multi-component educational interventions addressed to both adolescents and parents to reduce short sleep time. Copyright © 2016 Elsevier B.V. All rights reserved.

  12. Nutritional Status among the Urban Meitei Children and Adolescents of Manipur, Northeast India

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    Maibam Samson Singh

    2013-01-01

    Full Text Available Purpose. To determine the nutritional status (underweight and overweight among Meitei children and adolescents. Methods. Cross-sectional data on 854 subjects (384 boys and 470 girls were collected during the months of May 2009 to August 2009 following house-to-house survey. An anthropometric rod and a weighing scale were used to measure height and weight. The presence of underweight and overweight has been evaluated using the international cutoff points for children and adolescents. MS-Excel software was used for all statistical analyses. Results. A high prevalence of underweight (30.21% and overweight (3.12% in the present study was found among children and adolescent boys, respectively. Among girls, the prevalence of both underweight (33.86% and overweight (5.18% was reported higher among children than adolescents, and the differences in the distribution were significant at 0.05 levels. The overall prevalence of underweight (28.29% was found more or less the same among boys and girls, but overweight (5.10% was reported higher among girls than boys (2.34%. Conclusion. The possible reasons for both forms of malnutrition among Meitei children and adolescents could be traced through poverty, low dietary intake, socioeconomic condition, nutrition transition, and changing lifestyles. The other possible reasons could be due to peer pressure, eating habits, or emotional factor.

  13. Examples of scale interactions in local, urban, and regional air quality modelling

    Science.gov (United States)

    Mensink, C.; De Ridder, K.; Deutsch, F.; Lefebre, F.; Van de Vel, K.

    2008-09-01

    Air quality modeling can help to improve understanding of scale interactions related to meteorology, transport, emissions, formation, removal, and other processes taking place at local, urban, and regional scales. For the local scale, we used the coupling of a street canyon model with a Gaussian dispersion model to study the interactions of emissions and concentrations in urban streets and surrounding urban neighborhoods. The model combination was applied to a city quarter in Ghent, Belgium, and showed that up to 40% of the PM 2.5 concentrations inside street canyons were caused by emissions from the surrounding streets. For the urban scale, the AURORA model has been used successfully in assessments of urban air quality for entire cities or urbanized areas. It has been applied to the Ruhr area in Germany to evaluate the impact of compact or polycentric cities versus the impact of urban sprawl developments. Results for ozone and PM 10 showed that compact city structures may have more adverse effects in terms of air pollution exposure. For the regional scale, the EUROS model was used to study the urban and regional-scale interactions that are important in simulating concentrations of ozone, PM 2.5, and PM 10. It has been applied to study seasonal changes in aerosol concentrations in Flanders. High secondary aerosol concentrations were found during summer. This contribution was related to large contributions from outside the region, showing the importance of the continental scale when studying regional air quality problems.

  14. URBAN MORPHOLOGY FOR HOUSTON TO DRIVE MODELS-3/CMAQ AT NEIGHBORHOOD SCALES

    Science.gov (United States)

    Air quality simulation models applied at various horizontal scales require different degrees of treatment in the specifications of the underlying surfaces. As we model neighborhood scales ( 1 km horizontal grid spacing), the representation of urban morphological structures (e....

  15. ADDRESSING HUMAN EXPOSURES TO AIR POLLUTANTS AROUND BUILDINGS IN URBAN AREAS WITH COMPUTATIONAL FLUID DYNAMICS MODELS

    Science.gov (United States)

    This paper discusses the status and application of Computational Fluid Dynamics (CFD) models to address challenges for modeling human exposures to air pollutants around urban building microenvironments. There are challenges for more detailed understanding of air pollutant sour...

  16. Different Approaches for the Creation and Exploitation of 3D Urban Models

    National Research Council Canada - National Science Library

    Letourneau, Francois

    2002-01-01

    .... The creation of 3D urban models represents a real challenge, considering that short time for the creation of the models and relative unavailability of detailed geospatial data are both important constraints...

  17. Smartness and Urban Resilience. A Model of Energy Saving

    Directory of Open Access Journals (Sweden)

    Carmela Gargiulo

    2015-10-01

    The results have shown that the possibility of identifying an "ideal" sustainable urban form, able to maximize energy efficiency, still remains theoretical, opening up the possibility that there are different consumption patterns due to the different physical, environmental and building characteristics of urban areas.

  18. An Ecohydrologic Model for a Shallow Groundwater Urban Environment

    Science.gov (United States)

    The urban environment is a patchwork of natural and artificial surfaces that results in complex interactions with and impacts to natural hydrologic cycles. Evapotranspiration (ET) is a major hydrologic flow that is often altered from urbanization, though the mechanisms of change ...

  19. Modeling the effects of urban vegetation on air pollution

    Science.gov (United States)

    David J. Nowak; Patrick J. McHale; Myriam Ibarra; Daniel Crane; Jack C. Stevens; Chris J. Luley

    1998-01-01

    Urban vegetation can directly and indirectly affect local and regional air quality by altering the urban atmospheric environment. Trees affect local air temperature by transpiring water through their leaves, by blocking solar radiation (tree shade), which reduces radiation absorption and heat storage by various anthropogenic surfaces (e.g., buildings, roads), and by...

  20. Unified Data Model of Urban Air Pollution Dispersion and 3D Spatial City Models: Groundwork Assessment towards Sustainable Urban Development for Malaysia

    DEFF Research Database (Denmark)

    Ujang, Uznir; Anton, François; Rahman, Alias Abdul

    2013-01-01

    Understanding the behavior of urban air pollution is important en route for sustainable urban development (SUD). Malaysia is on its mission to be a developed country by year 2020 comprehends dealing with air pollution is one of the indicators headed towards it. At present monitoring and managing...... air pollution in urban areas encompasses sophisticated air quality modeling and data acquisition. However, rapid developments in major cities cause difficulties in acquiring the city geometries. The existing method in acquiring city geometries data via ground or space measurement inspection...... commonly available on the web, by having a unified data model shows the advantages in easy data acquisition, 3D visualization of air pollution dispersion and improves visual analysis of air quality monitoring in urban areas....

  1. A New Framework to Evaluate Urban Design Using Urban Microclimatic Modeling in Future Climatic Conditions

    Directory of Open Access Journals (Sweden)

    Dasaraden Mauree

    2018-04-01

    Full Text Available Building more energy-efficient and sustainable urban areas that will both mitigate the effects of climate change and anticipate living conditions in future climate scenarios requires the development of new tools and methods that can help urban planners, architects and communities achieve this goal. In the current study, we designed a workflow that links different methodologies developed separately, to derive the energy consumption of a university school campus for the future. Three different scenarios for typical future years (2039, 2069, 2099 were run, as well as a renovation scenario (Minergie-P. We analyzed the impact of climate change on the heating and cooling demand of buildings and determined the relevance of taking into account the local climate in this particular context. The results from the simulations confirmed that in the future, there will be a constant decrease in the heating demand, while the cooling demand will substantially increase. Significantly, it was further demonstrated that when the local urban climate was taken into account, there was an even higher rise in the cooling demand, but also that a set of proposed Minergie-P renovations were not sufficient to achieve resilient buildings. We discuss the implication of this work for the simulation of building energy consumption at the neighborhood scale and the impact of future local climate on energy system design. We finally give a few perspectives regarding improved urban design and possible pathways for future urban areas.

  2. Self-assessed dental health, oral health practices, and general health behaviors in Chinese urban adolescents

    DEFF Research Database (Denmark)

    Jiang, Han; Petersen, Poul Erik; Peng, Bin

    2005-01-01

    cluster sampling and covered three age groups: 11, 13, and 15 years. Data on dental and general health were collected by self-administered questionnaires. Self-assessment of dental health of Chinese adolescents was generally good, only 12% of the students answered that their teeth were "poor" or "very...... poor", and 9% claimed having "poor" or "very poor" gums. Eleven percent of participants said that other students made fun of their teeth; 24% of the respondents were dissatisfied with the appearance of their teeth, and 41% claimed that they had experienced toothache or symptoms during the previous 12...... months. Positive attitudes towards dental care were found in all age groups; 67% of adolescents brushed their teeth at least twice a day and 48% of the students used fluoridated toothpaste. Only 26% of the students visited a dentist during the previous 12 months. In all, 6% of the adolescents had tried...

  3. Psychoecological model of alcohol use in Mexican American adolescents.

    Science.gov (United States)

    Chun, Heejung; Devall, Esther; Sandau-Beckler, Patricia

    2013-06-01

    In this study, we proposed and tested a structural model based on Bronfenbrenner's ecological systems theory in order to further understand alcohol use among Hispanic adolescents, who are at greater risk of alcohol use than adolescents of other racial/ethnic groups. Family cohesion, school connectedness, and peer influence were conceptualized as three primary process factors, while psychological distress was used as a mediating factor and Mexican culture orientation as a cultural factor. The sample comprised 444 Mexican American adolescents (aged 16-20) living along the U.S./Mexico border. The proposed model explained 33 % of the variance in alcohol use. Most of the hypothesized relationships in the proposed model were supported: (a) low family cohesion had significant indirect effects mediated through psychological distress, poor school connectedness, and negative peer influence; (b) poor school connectedness had significant indirect effects mediated through psychological distress and negative peer influence; (c) psychological distress had a significant direct effect as well as a significant indirect effect mediated through negative peer influence; and (d) negative peer influence had the strongest direct effect. However, contrary to the hypothesis, Mexican culture orientation was not a protective factor, but rather had a significant positive relationship with negative peer influence. Lastly, it was found that gender, school status, Anglo cultural orientation, and severity of alcohol use did not have any moderating effects. Based on the collective findings, suggestions for primary prevention programs designed to reduce underage drinking among Mexican American youth were given.

  4. Parents as Role Models: Parental Behavior Affects Adolescents' Plans for Work Involvement

    Science.gov (United States)

    Wiese, Bettina S.; Freund, Alexandra M.

    2011-01-01

    This study (N = 520 high-school students) investigates the influence of parental work involvement on adolescents' own plans regarding their future work involvement. As expected, adolescents' perceptions of parental work behavior affected their plans for own work involvement. Same-sex parents served as main role models for the adolescents' own…

  5. The Self-Esteem, Perceived Social Support and Hopelessness in Adolescents: The Structural Equation Modeling

    Science.gov (United States)

    Savi Cakar, Firdevs; Karatas, Zeynep

    2012-01-01

    In this study, a developed model to explain a causal relationship between adolescent's self-esteem, perceived social support and hopelessness is tested. The purpose of the study is to explore the relationship between self-esteem, perceived social support and hopelessness in adolescents. A total of 257 adolescents, including 143 female and 114…

  6. The prevalence of overweight and its risk factors among adolescents in an urban city in Edo State.

    Science.gov (United States)

    Omuemu, V O; Omuemu, C E

    2010-06-01

    The prevalence of overweight is rising even in countries with significant rates of undernutrition. This is exacerbated by westernization of lifestyles and the image of prosperity associated with overweight. Children are not spared and the health consequences may become apparent in the near future. This study assessed the prevalence of overweight among adolescents in an urban city in a developing country. This cross-sectional study conducted from September to December 2005 involved 300 adolescents selected by cluster sampling in Benin-city, Nigeria. Overweight and risk of overweight were defined as Body mass index (BMI)-for-age > or = 95th percentile and BMI-for-age 85th to overweight while 52.7% were at risk of overweight. Risk factors of overweight identified were consumption of snacks (64.3%), soft drinks (85.7%) and physical inactivity (69.7%). Being overweight was significantly associated with consumption of snacks, soft drinks, physical inactivity and positive family history of obesity, (p overweight suggests that the already high prevalence of overweight will increase in the near future. Preventive measures are required to forestall this increase.

  7. Modelling the long-term consequences of a hypothetical dispersal of radioactivity in an urban area including remediation alternatives

    DEFF Research Database (Denmark)

    Thiessen, K.M.; Andersson, Kasper Grann; Batandjieva, B.

    2009-01-01

    The Urban Remediation Working Group of the International Atomic Energy Agency's EMRAS (Environmental Modelling for Radiation Safety) program was organized to address issues of remediation assessment modelling for urban areas contaminated with dispersed radionuclides. The present paper describes t...

  8. Biological Predispositions and Social Control in Adolescent Sexual Behavior.

    Science.gov (United States)

    Udry, J. Richard

    1988-01-01

    Proposes a biosocial model of adolescent sexuality. Examines both sociological and biological factors in the sexual behavior of a sample of 102 male and 99 female urban public high school students. (FMW)

  9. Reproductive health awareness among adolescent girls of a government school in an urban slum of Pune City

    Directory of Open Access Journals (Sweden)

    Pooja Shankar

    2017-01-01

    Full Text Available Introduction: Reproductive health of adolescent girls is crucial in determining the health of future generations. For ensuring informed decisions by adolescents regarding their sexuality and reproductive health, National AIDS Control Organisation has introduced life skills education in school curriculum. However, there exist many roadblocks in implementation from theory to practice. Hence, the present study was conducted to assess the reproductive health awareness and most preferred source of information. Materials and Methods: This was a descriptive cross-sectional study among girls of classes VI–XII of a Government High School in an urban slum of Maharashtra. Two hundred and fifty girls participated; 39 questionnaires were incomplete, hence 211 responses were analyzed. All girls were educated about reproductive health and life skills issues after the study. Results: Mean age of the participant girls was 14.9 ± 1.75 years. The level of awareness improved significantly with increase in class of respondent (P 0.05. Eighty percent of them were unaware of the appearance of secondary sexual characteristics in both the genders. Less than 30% of the girls were aware of contraceptives. Regarding effects of premarital sex, 57% of the participants were concerned about bringing a bad name to themselves and their family, while reproductive tract infections (9%, HIV/AIDS (29%, were cited as other ill effects. Seventy percent felt comfortable discussing or confiding regarding reproductive health issues with friends rather than parents, teachers, or medical professionals. Conclusion: Knowledge and awareness about reproductive and sexual health issues among adolescent girls was dismal.

  10. Disordered eating and body image issues and their associated factors among adolescents in urban secondary schools in Sarawak, Malaysia.

    Science.gov (United States)

    Cheah, Whye Lian; Hazmi, Helmy; Chang, Ching Thon

    2017-04-01

    Eating disorders are common health issues among the adolescents. The objective of this study was to determine the prevalence of eating disorders and their relationship with body mass index, body part satisfaction and perception on body weight among urban secondary school children. It was a cross-sectional study conducted in Kuching, Sarawak. Data was collected using a self-administered questionnaire that consist of the Eating Attitude Test-26 (EAT-26), perception on body part satisfaction and body weight, and anthropometric measurement. Data was entered and analysed using SPSS version 22. A total of 329 respondents participated in this study with 59% females and 60.5% Malays. There were 14.3% of the respondents overweight and obese, with higher percentage among males (19.3%). About 18.5% of the respondents were found to be at risk of eating disorders with higher prevalence among males (19.3%). More females reported to have higher prevalence of body part dissatisfaction (46.9%) and body weight (37.6%) compared to males (40%, 28.1%). The statistical results indicated there were significant associations between EAT-26 and body mass index (BMI) (p=0.039), body part satisfaction (p=0.004), and perception of body weight (p=0.038). Eating disorders are becoming more prevalent amongst adolescents, particularly among males. As eating disorder are strongly associated with adolescent mental and physical health, intervention programme on their developmental challenges and issues for both males and females should be in place particularly in the school education syllabus.

  11. Urban Multisensory Laboratory, AN Approach to Model Urban Space Human Perception

    Science.gov (United States)

    González, T.; Sol, D.; Saenz, J.; Clavijo, D.; García, H.

    2017-09-01

    An urban sensory lab (USL or LUS an acronym in Spanish) is a new and avant-garde approach for studying and analyzing a city. The construction of this approach allows the development of new methodologies to identify the emotional response of public space users. The laboratory combines qualitative analysis proposed by urbanists and quantitative measures managed by data analysis applications. USL is a new approach to go beyond the borders of urban knowledge. The design thinking strategy allows us to implement methods to understand the results provided by our technique. In this first approach, the interpretation is made by hand. However, our goal is to combine design thinking and machine learning in order to analyze the qualitative and quantitative data automatically. Now, the results are being used by students from the Urbanism and Architecture courses in order to get a better understanding of public spaces in Puebla, Mexico and its interaction with people.

  12. Sleep duration, schedule and quality among urban Chinese children and adolescents: associations with routine after-school activities.

    Science.gov (United States)

    Jiang, Xiaoxiao; Hardy, Louise L; Baur, Louise A; Ding, Ding; Wang, Ling; Shi, Huijing

    2015-01-01

    With rapid urbanization accompanied by lifestyle changes, children and adolescents living in metropolitan areas are faced with many time use choices that compete with sleep. This study reports on the sleep hygiene of urban Chinese school students, and investigates the relationship between habitual after-school activities and sleep duration, schedule and quality on a regular school day. Cross-sectional, school-based survey of school children (Grades 4-8) living in Shanghai, China, conducted in 2011. Self-reported data were collected on students' sleep duration and timing, sleep quality, habitual after-school activities (i.e. homework, leisure-time physical activity, recreational screen time and school commuting time), and potential correlates. Mean sleep duration of this sample (mean age: 11.5-years; 48.6% girls) was 9 hours. Nearly 30% of students reported daytime tiredness. On school nights, girls slept less (psleep duration (p=0.005) and bedtime (p=0.002). Prolonged time spent on homework and mobile phone playing was related to shorter sleep duration and later bedtime. Adjusting for all other factors, with each additional hour of mobile phone playing, the odds of daytime tiredness and having difficulty maintaining sleep increased by 30% and 27% among secondary students, respectively. There are sex differences in sleep duration, schedule and quality. Habitual activities had small but significant associations with sleep hygiene outcomes especially among secondary school students. Intervention strategies such as limiting children's use of electronic screen devices after school are implicated.

  13. Novel psychoactive substances: use and knowledge among adolescents and young adults in urban and rural areas.

    Science.gov (United States)

    Martinotti, Giovanni; Lupi, Matteo; Carlucci, Leonardo; Cinosi, Eduardo; Santacroce, Rita; Acciavatti, Tiziano; Chillemi, Eleonora; Bonifaci, Ludovica; Janiri, Luigi; Di Giannantonio, Massimo

    2015-07-01

    Novel psychoactive substances (NPS) are new psychotropic drugs, not scheduled under the International Conventions on Psychotropic Substances, but which may pose a relevant public health threat. In this study, we investigated knowledge and use of NPS in a sample of Italian youth in urban and rural areas. Between December 2012 and October 2013, we administered a questionnaire to a sample of 3011 healthy subjects (44.7% men; 55.3% women), aged between 16 and 24 years and recruited in urban, intermediate and rural areas of Italy. Of the global sample, 53.3% declared to have some knowledge on NPS, with a higher knowledge in urban areas. Mephedrone (26%), desomorphine (22.6%) and methamphetamine (21.7%) were the most commonly known drugs. NPS use was reported by 4.7% of the sample, without significant differences between urban and rural areas; mephedrone (3.3%), synthetic cannabinoids (1.2%) and Salvia divinorum (0.3%) consumption has been identified. NPS use was also predictive of binge-drinking behaviours (χ(2) (4) = 929.58, p < .001). Urban areas may represent a focal point for preventive strategies, given the presence of higher levels of NPS knowledge. Moreover, the association between binge-drinking habits and NPS use was really strong. This issue should not be underestimated because of its medical, psychopathological and social consequences. Copyright © 2015 John Wiley & Sons, Ltd.

  14. Estimating the Impact of Urbanization on Air Quality in China Using Spatial Regression Models

    Directory of Open Access Journals (Sweden)

    Chuanglin Fang

    2015-11-01

    Full Text Available Urban air pollution is one of the most visible environmental problems to have accompanied China’s rapid urbanization. Based on emission inventory data from 2014, gathered from 289 cities, we used Global and Local Moran’s I to measure the spatial autorrelation of Air Quality Index (AQI values at the city level, and employed Ordinary Least Squares (OLS, Spatial Lag Model (SAR, and Geographically Weighted Regression (GWR to quantitatively estimate the comprehensive impact and spatial variations of China’s urbanization process on air quality. The results show that a significant spatial dependence and heterogeneity existed in AQI values. Regression models revealed urbanization has played an important negative role in determining air quality in Chinese cities. The population, urbanization rate, automobile density, and the proportion of secondary industry were all found to have had a significant influence over air quality. Per capita Gross Domestic Product (GDP and the scale of urban land use, however, failed the significance test at 10% level. The GWR model performed better than global models and the results of GWR modeling show that the relationship between urbanization and air quality was not constant in space. Further, the local parameter estimates suggest significant spatial variation in the impacts of various urbanization factors on air quality.

  15. impact of life style on body Weight in adolescents on the basis of questionnaire findings in selected group of youth from rural and urban areas

    Directory of Open Access Journals (Sweden)

    Monika Ścibor

    2012-03-01

    Full Text Available Introduction: Overweight and primary obesity in children and adolescents is a crucial problem in public health. Obese children and adolescents are especially susceptible to obesity in adulthood and consequently exposed to many obesity related diseases. Objective: Evaluation of overweight and primary obesity in urban and rural youth populations and comparison of life style concerning: physical activity, sedentary behaviors, dietary habits among overweight and obese adolescents and their peers with proper Body Mass Index value. Materials and methods: The study was performed in the group of 136 students from junior high school. The students with BMI value over 85th percentile of sex-specific growth charts were classified as overweight. Research tool was a questionnaire. Results: 15,9% of adolescents were overweight, out of which 4,5% were obese. There was not a significant relation between Body Mass Index and the place of residence. Overweight and obese adolescents revealed lower physical activity and tendency to spend much more time playing computer games. Adolescents with overweight or obesity did not regularly have breakfast at weekends, more often had sweets and sweet drinks and also high energy and very salty snacks instead. Conclusions: Overweight and obesity is a serious problem among students from junior high school population which calls for taking immediate preventive measures to promote healthy lifestyle among children and adolescents.

  16. Engaging Urban Parents of Early Adolescents in Parenting Interventions: Home Visits vs. Group Sessions

    Science.gov (United States)

    Finigan-Carr, Nadine M.; Copeland-Linder, Nikeea; Haynie, Denise L.; Cheng, Tina L.

    2014-01-01

    Interventions targeting parents of young children have shown effectiveness, but research is lacking about best practices for engaging parents of early adolescents. Low levels of enrollment and attendance in parenting interventions present major problems for researchers and clinicians. Effective and efficient ways to engage and collaborate with…

  17. Prevalence and predictors of cigarette smoking among Greek urban adolescents: A cross-sectional study

    Directory of Open Access Journals (Sweden)

    Athanasia Liozidou

    2015-10-01

    Greek adolescents report lower smoking rates than previously reported, yet it is a population experimenting with tobacco products. Electronic cigarette emerged as the third most likely product of experimentation. The social origin of smoking behavior is confirmed, as well as the imperative need to encourage tobacco-free school policies and bans on tobacco advertising, promotion and sponsorship.

  18. Perception of risk of HIV among adolescents' living in an urban slum ...

    African Journals Online (AJOL)

    AJRH Managing Editor

    dwellers established that they have a high-risk perception of contracting the virus5. However, perception of sexual and reproductive health risk has not been consistent with behaviour in a number of studies5-8. Gender differentials have been noted in perception of risk of HIV among adolescents. For instance, Akwara et al.9, ...

  19. Shyness-Sensitivity, Aggression, and Adjustment in Urban Chinese Adolescents at Different Historical Times

    Science.gov (United States)

    Liu, Junsheng; Chen, Xinyin; Li, Dan; French, Doran

    2012-01-01

    The market-oriented economic reform in China over the past two decades has resulted in considerable changes in social attitudes regarding youth's behaviors. This study examined the relations of shyness and aggression to adjustment in Chinese adolescents at different historical times. Participants came from two cohorts (1994 and 2008) of…

  20. Romantic Relationship Dynamics of Urban African American Adolescents: Patterns of Monogamy, Commitment, and Trust

    Science.gov (United States)

    Towner, Senna L.; Dolcini, M. Margaret; Harper, Gary W.

    2015-01-01

    Relationship dynamics develop early in life and are influenced by social environments. STI/HIV prevention programs need to consider romantic relationship dynamics that contribute to sexual health. The aim of this study was to examine monogamous patterns, commitment, and trust in African American adolescent romantic relationships. The authors also…

  1. Bridging the gap between adolescent sexuality and HIV risk: the urban Malaysian perspective.

    Science.gov (United States)

    Ng, C J; Kamal, S F

    2006-06-01

    This study aimed to qualitatively explore adolescents' sexuality and their relation to human immunodeficiency virus (HIV) risk in Malaysia. This study was conducted in 2002 among 16 male and female private college students aged between 18 and 22 years old, all of whom were sexually active. Semi-structured individual interviews were carried out. There were definite differences in gender roles in terms of how adolescents perceived sex, selection of sex partners and communication with their partners. Definitions of stable and casual relationships differed between males and females. Most participants were concerned about pregnancy rather than sexually transmitted diseases or HIV infection when they interpreted safe sex. Reasons for not practising safe sex include trust between sex partners, complacency, low perception of risk, and negative attitudes towards condom use. These findings were closer to those observed in the developed countries. The findings from this study will serve as a guide to plan for local adolescent health education. It can also serve as a basis for more in-depth quantitative and qualitative research on adolescent sexuality.

  2. The Relationship between Religiosity and Adjustment among African-American, Female, Urban Adolescents.

    Science.gov (United States)

    Ball, Joanna; Armistead, Lisa; Austin, Barbara-jeanne

    2003-01-01

    Study provides a description of religiosity in a sample of African-American female teens and examines religion as a resource for these adolescents by focusing on the association between religiosity and sexual activity, self-esteem, and general psychological functioning. Results reveal that greater overall religiosity was associated with greater…

  3. Drug Trafficking and Drug Use among Urban African American Early Adolescents.

    Science.gov (United States)

    Li, Xiaoming; And Others

    1994-01-01

    Examined relationships between drug trafficking (selling and delivering), cigarette and alcohol use, and illicit drug use among African-American adolescents. Found that drug trafficking is equally likely to occur with or without cigarette and alcohol use or illicit drug involvement, suggesting that intervention should extend to drug trafficking in…

  4. Exposure to Violence and Post-traumatic Stress Disorder in Urban Adolescents.

    Science.gov (United States)

    Berton, Margaret Wright; Stabb, Sally D.

    1996-01-01

    Investigates variables associated with posttraumatic stress disorder in adolescents in a metropolitan area. Comparisons were made with regard to gender, ethnicity, family constellation, self-reported exposure to violence, self-reported exposure to trauma, and incidence of violent crime in the vicinity of school attendance. Revealed minority males…

  5. Fine modeling of energy exchanges between buildings and urban atmosphere

    International Nuclear Information System (INIS)

    Daviau-Pellegrin, Noelie

    2016-01-01

    This thesis work is about the effect of buildings on the urban atmosphere and more precisely the energetic exchanges that take place between these two systems. In order to model more finely the thermal effects of buildings on the atmospheric flows in simulations run under the CFD software Code-Saturne, we proceed to couple this tool with the building model BuildSysPro. This library is run under Dymola and can generate matrices describing the building thermal properties that can be used outside this software. In order to carry out the coupling, we use these matrices in a code that allows the building thermal calculations and the CFD to exchange their results. After a review about the physical phenomena and the existing models, we explain the interactions between the atmosphere and the urban elements, especially buildings. The latter can impact the air flows dynamically, as they act as obstacles, and thermally, through their surface temperatures. At first, we analyse the data obtained from the measurement campaign EM2PAU that we use in order to validate the coupled model. EM2PAU was carried out in Nantes in 2011 and represents a canyon street with two rows of four containers. Its distinctive feature lies in the simultaneous measurements of the air and wall temperatures as well as the wind speeds with anemometers located on a 10 m-high mast for the reference wind and on six locations in the canyon. This aims for studying the thermal influence of buildings on the air flows. Then the numerical simulations of the air flows in EM2PAU is carried out with different methods that allow us to calculate or impose the surface temperature we use for each of the container walls. The first method consists in imposing their temperatures from the measurements. For each wall, we set the temperature to the surface temperature that was measured during the EM2PAU campaign. The second method involves imposing the outdoor air temperature that was measured at a given time to all the

  6. Model of urban poverty alleviation through the development of entrepreneurial spirit and business competence

    Science.gov (United States)

    Aryaningsih, NN; Irianto, Kt; Marsa Arsana, Md; Juli Suarbawa, Kt

    2018-01-01

    The rapid increased of urban population can not be controlled by the city government. This will have an impact on the emergence of new poverty in urban areas, due to inadequate of the job opportunities and skills. Government programs for poverty alleviation can reduce some rural poverty, but have not been able to overcome poverty in urban areas. The diversity of urban issues and needs is greater than in rural areas. Therefore, it is necessary to conduct the research with the aim to build urban poverty reduction model through the development of entrepreneurship spirit and business competence. This research was conducted by investigation method, and questionnaire. Questionnaires are arranged with rating scale measurements. The validity and reliability of the questionnaire were tested by factor analysis. Model construction is constructed from various informant analyzes and descriptive statistical analysis. The results show that poverty alleviation model is very effective done by developing spirit of entrepreneurship and business competence.

  7. Neighbourhood satisfaction and happiness but not urbanization level affect self-rated health in adolescents.

    Science.gov (United States)

    Shiue, Ivy

    2012-07-01

    It is hypothesized that neighbourhood satisfaction and subjective happiness are associated with self-rated health or mediate the effect from urbanization levels among youth. Taiwan Youth Project was a cross-sectional study in two cities, Taipei and Yilan, Taiwan including 5,586 students. Information on neighbourhood satisfaction, happiness, urbanization levels, and self-rated health was obtained by interview. Neighbourhood satisfaction and happiness were both significantly associated with self-rated health (both p0.05). Neighbourhood satisfaction is also highly correlated with happiness (phappiness for youth.

  8. Model of urban water management towards water sensitive city: a literature review

    Science.gov (United States)

    Maftuhah, D. I.; Anityasari, M.; Sholihah, M.

    2018-04-01

    Nowadays, many cities are facing with complex issues such as climate change, social, economic, culture, and environmental problems, especially urban water. In other words, the city has to struggle with the challenge to make sure its sustainability in all aspects. This research focuses on how to ensure the city sustainability and resilience on urban water management. Many research were not only conducted in urban water management, but also in sustainability itself. Moreover, water sustainability shifts from urban water management into water sensitive city. This transition needs comprehensive aspects such as social, institutional dynamics, technical innovation, and local contents. Some literatures about model of urban water management and the transition towards water sensitivity had been reviewed in this study. This study proposed discussion about model of urban water management and the transition towards water sensitive city. Research findings suggest that there are many different models developed in urban water management, but they are not comprehensive yet and only few studies discuss about the transition towards water sensitive and resilience city. The drawbacks of previous research can identify and fulfill the gap of this study. Therefore, the paper contributes a general framework for the urban water management modelling studies.

  9. Model based monitoring of urban traffic noise : Field test results for road side and shielded sides

    NARCIS (Netherlands)

    Eerden, F.J.M. van der; Lutgendorf, D.; Wessels, P.W.; Basten, T.G.H.

    2012-01-01

    Urban traffic noise can be a major issue for people and (local) governments. On a local scale the use of measurements is increasing, especially when measures or changes to the local infrastructure are proposed. However, measuring (only) urban traffic noise is a challenging task. By using a model

  10. Prevalence of Internet addiction and risk of developing addiction as exemplified by a group of Polish adolescents from urban and rural areas

    OpenAIRE

    Beata Pawłowska; Maciej Zygo; Emilia Potembska; Lucyna Kapka-Skrzypczak; Piotr Dreher; Zbigniew Kędzierski

    2015-01-01

    [b]Objective. [/b]The objective of the study was to determine the prevalence of Internet addiction and the risk of developing this addiction in Polish adolescents attending junior high schools and high school in Lublin Province, to indicate the differences regarding the intensity of Internet addiction symptoms, and the types of online activity of adolescents residing in urban and rural areas. [b]Material and Methods[/b]. The examined group comprised 1,860 participants (1,320 girls and 5...

  11. Parametric Modeling of Urban Landscape: Decoding the Brasilia of Lucio Costa from Modernism to Present Days

    Directory of Open Access Journals (Sweden)

    Ana Clara Moura

    2014-05-01

    Full Text Available The paper presents the case study of the Pilot-Plan of Brasilia, important example of modernist urban design protected as human heritage. Discusses a methodological process to promote visualization of maximum envelops of urban volumes, organized in a set of rules and scripts which structures urban parameters in a logic of volume constructions. Applies City Engine - ESRI facilities to construct and visualize the urban rules. It has the goal to promote characterization, analysis, proposals and simulation of urban parameters in order to support decision making in land use transformation. The research deals with the difficulties of management urban pressure of transformation and the maintenance of urban cultural heritage. The methodology defends the change from authorial urban design to the decoding of collective values and goals. The 3D modeling and dynamic visualization promotes the composition of the whole, which means to work in a relative mode, and not in an absolute sense. Although it had been developed for a particular case study, the protected historical area of Brasilia, it presents methodological processes of how to structure rules of three-dimensional modeling to simulate the maximum constructive authorized by planning legislation (maximum envelopes, so that it can be reapplied in any other situation of definition of parameters in urban master plans and in laws for land use and occupation.

  12. Physics-based statistical model and simulation method of RF propagation in urban environments

    Science.gov (United States)

    Pao, Hsueh-Yuan; Dvorak, Steven L.

    2010-09-14

    A physics-based statistical model and simulation/modeling method and system of electromagnetic wave propagation (wireless communication) in urban environments. In particular, the model is a computationally efficient close-formed parametric model of RF propagation in an urban environment which is extracted from a physics-based statistical wireless channel simulation method and system. The simulation divides the complex urban environment into a network of interconnected urban canyon waveguides which can be analyzed individually; calculates spectral coefficients of modal fields in the waveguides excited by the propagation using a database of statistical impedance boundary conditions which incorporates the complexity of building walls in the propagation model; determines statistical parameters of the calculated modal fields; and determines a parametric propagation model based on the statistical parameters of the calculated modal fields from which predictions of communications capability may be made.

  13. Mitigation of urban heat stress – a modelling case study for the area of Stuttgart

    Directory of Open Access Journals (Sweden)

    Fallmann, Joachim

    2014-04-01

    Full Text Available In 2050 the fraction of urban global population will increase to over 69%, which means that around 6.3 billion people are expected to live in urban areas (UN 2011. Cities are the predominant habitation places for humans to live and are vulnerable to extreme weather events aggravating phenomena like heat stress. Finding mitigation strategies to sustain future development is of great importance, given expected influences on human health. In this study, the mesoscale numerical model WRF is used on a regional scale for the urban area of Stuttgart, to simulate the effect of urban planning strategies on dynamical processes affecting urban climate. After comparing two urban parameterisation schemes, a sensitivity study for different scenarios is performed; it shows that a change of the reflective properties of surfaces has the highest impact on near-surface temperatures compared to an increase of urban green areas or a decrease of building density. The Urban Heat Island (UHI describes the temperature difference between urban and rural temperatures; it characterises regional urban climate and is responsible for urban-rural circulation patterns. Applying urban planning measures may decrease the intensity of the UHI in the study area by up to 2 °C by using heat-reflective roof paints or by 1 °C through replacing impervious surfaces by natural vegetation in the urban vicinity – compared to a value of 2.5 °C for the base case. Because of its topographical location in a valley and the overall high temperatures in this region, the area of Stuttgart suffers from heat stress to a comparatively large extent.

  14. Modeling an Improvised Nuclear Device in an Urban Environment

    National Research Council Canada - National Science Library

    Viar, William

    2002-01-01

    .... This thesis had four objectives. The first objective reviewed the four blast effects: blast wave, thermal radiation, ionizing radiation, and electromagnetic pulse as they apply to low yield weapons in an urban environment...

  15. Superlinear and sublinear urban scaling in geographical networks modeling cities

    Science.gov (United States)

    Yakubo, K.; Saijo, Y.; Korošak, D.

    2014-08-01

    Using a geographical scale-free network to describe relations between people in a city, we explain both superlinear and sublinear allometric scaling of urban indicators that quantify activities or performances of the city. The urban indicator Y (N) of a city with the population size N is analytically calculated by summing up all individual activities produced by person-to-person relationships. Our results show that the urban indicator scales superlinearly with the population, namely, Y(N )∝Nβ with β >1, if Y (N) represents a creative productivity and the indicator scales sublinearly (β <1) if Y (N) is related to the degree of infrastructure development. These results coincide with allometric scaling observed in real-world urban indicators. We also show how the scaling exponent β depends on the strength of the geographical constraint in the network formation.

  16. Adolescent Girls' Self-Concept and Its Related Factors Based on Roy Adaptation Model

    OpenAIRE

    M. Basiri Moghadam; SH. Khosravan; L. Sadeghmoghadam; N. Ebrahimi Senoo

    2017-01-01

    Aims: One of the most important factors of individual health in the adolescents is the self-concept. As a nursing model, the Roy adaptation model mainly investigates the factor. The aim of the study was to investigate the self-concept and its related factors in the adolescent girls in Gonabad Township, based on the Roy adaptation model. Instrument & Methods: In the descriptive cross-sectional study, 270 adolescent girls were studied in Gonabad Township, Iran, in 2015. The subjects were s...

  17. Detailed Urban Heat Island Projections for Cities Worldwide: Dynamical Downscaling CMIP5 Global Climate Models

    OpenAIRE

    Lauwaet, Dirk; Hooyberghs, Hans; Maiheu, Bino; Lefebvre, Wouter; Driesen, Guy; Looy, Stijn Van; Ridder, Koen De

    2015-01-01

    A new dynamical downscaling methodology to analyze the impact of global climate change on the local climate of cities worldwide is presented. The urban boundary layer climate model UrbClim is coupled to 11 global climate models contained in the Coupled Model Intercomparison Project 5 archive, conducting 20-year simulations for present (1986–2005) and future (2081–2100) climate conditions, considering the Representative Concentration Pathway 8.5 climate scenario. The evolution of the urban hea...

  18. Car sharing demand estimation and urban transport demand modelling using stated preference techniques

    OpenAIRE

    Catalano, Mario; Lo Casto, Barbara; Migliore, Marco

    2008-01-01

    The research deals with the use of the stated preference technique (SP) and transport demand modelling to analyse travel mode choice behaviour for commuting urban trips in Palermo, Italy. The principal aim of the study was the calibration of a demand model to forecast the modal split of the urban transport demand, allowing for the possibility of using innovative transport systems like car sharing and car pooling. In order to estimate the demand model parameters, a specific survey was carried ...

  19. Frequency of Internet addiction and development of social skills in