Évaluation du potentiel de la télédétection spatiale pour l'étude du milieu urbain : le cas de Montréal

1987 ◽  
Vol 14 (1) ◽  
pp. 111-117 ◽  
Author(s):  
M. Carignan ◽  
D. Morin ◽  
R. Brochu ◽  
A. Royer
Keyword(s):  
Thematic Analysis ◽  
Urban Areas ◽  
Composite Image ◽  
Milieu Urbain ◽  
The Mean ◽  
Image Production ◽  
Color Composite ◽  
Urban Characteristics ◽  
Speed Of Analysis ◽  
Potential Use

Satellite imagery in multispectral mode actually available is provided by MSS (multispectral scanner) and TM (thematic mapper) sensors aboard the American satellite LANDSAT-5. Potential use of this type of data for study of the urban environment is quite relevant, as it associates speed of analysis with competitive cost.Using as an example the study of the Montréal, Quebec region, enhanced color composite image production demonstrates the possibilities of TM data in the photo-interpretation of urban characteristics owing to better spatial resolution. On the other hand, the thematic analysis of land units using automatic classification techniques for cartographic purposes gives five land-use classes. These correspond quite well to the classification used by urbanists for major urban functions. The mean accuracy in terms of area is in the order of 97% for the total of urban areas and 75% for each class.

scholarly journals Classification of COSMO SkyMed SAR Data Based on Coherence and Backscattering Coefficient

2012 ◽  
pp. 87-90
Author(s):  
V. Vijaya ◽  
G.Jenny Niveditha
Keyword(s):  
Urban Areas ◽  
Supervised Classification ◽  
Classification Scheme ◽  
Backscattering Coefficient ◽  
Composite Image ◽  
False Color ◽  
False Color Composite ◽  
Color Composite ◽  
Difference Images

A novel supervised classification approach is proposed for high-resolution dual-polarization (dual-pol) amplitude COSMO SkyMed images. Coherence, mean backscattering coefficient and backscatter difference images are generated, from which the False Color Composite (FCC) image is formed. A classification scheme based on maximum likelihood algorithm land cover classification is implemented on the false color composite image to classify the river, vegetation and the urban areas of Jharia, located in the state of Jharkhand in India using MATLAB 7.6 and ENVI 4.7.

scholarly journals Key factors to facilitate locally driven family planning programming: a qualitative analysis of urban stakeholder perspectives in Africa and Asia

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Lisa Mwaikambo ◽  
Sarah Brittingham ◽  
Saori Ohkubo ◽  
Ruwaida Salem ◽  
Denis Joel Sama ◽  
...  
Keyword(s):  
Family Planning ◽  
Health Systems ◽  
Thematic Analysis ◽  
Urban Areas ◽  
Local Governments ◽  
Scale Up ◽  
Analytical Framework ◽  
Essential Elements ◽  
Evidence Based ◽  
Country Ownership

Abstract Background There has been greater recognition of the importance of country ownership in global health and development. However, operationalising country ownership to ensure the scale up and sustainability of proven interventions remains elusive at best. To address this challenge, we undertook a thematic analysis of interviews collected from representatives of local governments, public health systems, and communities in poor urban areas of East Africa, Francophone West Africa, India, and Nigeria, supported by The Challenge Initiative (TCI), aiming to rapidly and sustainably scale up evidence-based reproductive health and family planning solutions. Methods The main objective of this study was to explore critical elements needed for implementing and scaling evidence-based family planning interventions. The research team conducted thematic analysis of 96 stories collected using the Most Significant Change (MSC) technique between July 2018 and September 2019. After generating 55 unique codes, the codes were grouped into related themes, using TCI’s model as a general analytical framework. Results Five key themes emerged: (1) strengthening local capacity and improving broader health systems, (2) shifting mindsets of government and community toward local ownership, (3) institutionalising the interventions within existing government structures, (4) improving data demand and use for better planning of health services, and (5) enhancing coordination of partners. Conclusion While some themes feature more prominently in a particular region than others, taken together they represent what stakeholders perceive to be essential elements for scaling up locally-driven health programmes in urban areas in Africa and Asia.

scholarly journals Country-level determinants of the severity of the first global wave of the COVID-19 pandemic: an ecological study

BMJ Open ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. e042034
Author(s):  
Tiberiu A Pana ◽  
Sohinee Bhattacharya ◽  
David T Gamble ◽  
Zahra Pasdar ◽  
Weronika A Szlachetka ◽  
...  
Keyword(s):  
Mortality Rate ◽  
Vaccination Coverage ◽  
Urban Areas ◽  
Ecological Study ◽  
Environmental Parameters ◽  
The Philippines ◽  
International Travel ◽  
Bcg Vaccination ◽  
Country Level ◽  
The Mean

ObjectiveWe aimed to identify the country-level determinants of the severity of the first wave of the COVID-19 pandemic.DesignEcological study of publicly available data. Countries reporting >25 COVID-19 related deaths until 8 June 2020 were included. The outcome was log mean mortality rate from COVID-19, an estimate of the country-level daily increase in reported deaths during the ascending phase of the epidemic curve. Potential determinants assessed were most recently published demographic parameters (population and population density, percentage population living in urban areas, population >65 years, average body mass index and smoking prevalence); economic parameters (gross domestic product per capita); environmental parameters (pollution levels and mean temperature (January–May); comorbidities (prevalence of diabetes, hypertension and cancer); health system parameters (WHO Health Index and hospital beds per 10 000 population); international arrivals; the stringency index, as a measure of country-level response to COVID-19; BCG vaccination coverage; UV radiation exposure; and testing capacity. Multivariable linear regression was used to analyse the data.Primary outcomeCountry-level mean mortality rate: the mean slope of the COVID-19 mortality curve during its ascending phase.ParticipantsThirty-seven countries were included: Algeria, Argentina, Austria, Belgium, Brazil, Canada, Chile, Colombia, the Dominican Republic, Ecuador, Egypt, Finland, France, Germany, Hungary, India, Indonesia, Ireland, Italy, Japan, Mexico, the Netherlands, Peru, the Philippines, Poland, Portugal, Romania, the Russian Federation, Saudi Arabia, South Africa, Spain, Sweden, Switzerland, Turkey, Ukraine, the UK and the USA.ResultsOf all country-level determinants included in the multivariable model, total number of international arrivals (beta 0.033 (95% CI 0.012 to 0.054)) and BCG vaccination coverage (−0.018 (95% CI −0.034 to –0.002)), were significantly associated with the natural logarithm of the mean death rate.ConclusionsInternational travel was directly associated with the mortality slope and thus potentially the spread of COVID-19. Very early restrictions on international travel should be considered to control COVID-19 outbreaks and prevent related deaths.

scholarly journals Salt intake and blood pressure in Iranian children and adolescents: a population-based study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Mohammad Hassan Emamian ◽  
Hossein Ebrahimi ◽  
Hassan Hashemi ◽  
Akbar Fotouhi
Keyword(s):  
Blood Pressure ◽  
Rural Areas ◽  
Urban Areas ◽  
Salt Intake ◽  
Daily Intake ◽  
Population Based ◽  
World Health ◽  
Second Phase ◽  
Salt Consumption ◽  
The Mean

Abstract Background Previous studies have reported a high prevalence of hypertension in Iranian students, especially in rural areas. The aim of this study was to investigate the daily intake of salt in students and its association with high blood pressure. Methods A random sub-sample was selected from the participants of the second phase of Shahroud schoolchildren eye cohort study and then a random urine sample was tested for sodium, potassium and creatinine. Urine electrolyte esexcretion and daily salt intake were calculated by Tanaka et al.’s formula. Results Among 1455 participants (including 230 participants from rural area and 472 girls), the mean age was 12.9 ± 1.7 year and the mean daily salt intake was 9.7 ± 2.6 g (95% CI 9.5–9.8). The mean salt consumption in rural areas [10.8 (95% CI 10.4–11.2)] was higher than urban areas [9.4 (95% CI 9.3–9.6)], in people with hypertension [10.8 (95% CI 10.3–11.3)] was more than people with normal blood pressure [9.4 (95% CI 9.3–9.6)], and in boys [9.8 (95% CI 9.7–10.0)] was more than girls [9.3 (95% CI 9.1–9.6)]. Higher age, BMI z-score, male sex and rural life, were associated with increased daily salt intake. Increased salt intake was associated with increased systolic and diastolic blood pressure. Conclusion Daily salt intake in Iranian adolescents was about 2 times the recommended amount of the World Health Organization, was higher in rural areas and was associated with blood pressure. Reducing salt intake should be considered as an important intervention, especially in rural areas.

scholarly journals A hospital-based study on clinical data, demographic data and visual function of keratoconus patients in Central China

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kaili Yang ◽  
Liyan Xu ◽  
Qi Fan ◽  
Yuwei Gu ◽  
Bo Zhang ◽  
...  
Keyword(s):  
Clinical Data ◽  
Rural Areas ◽  
Visual Function ◽  
Urban Areas ◽  
Demographic Data ◽  
Corneal Thickness ◽  
Positive Family History ◽  
Education Level ◽  
Central China ◽  
The Mean

AbstractChina is a populous country but lacks epidemiological data on keratoconus (KC). The present study aimed to investigate the clinical data, demographic data, and visual function (VF) data of KC patients in Central China. A total of 524 KC eyes in 307 KC patients (217 bilateral and 90 unilateral) from Henan Eye Hospital were included in the current study. Demographic and VF data were assessed with questionnaires administered by well-trained staff during face-to-face interviews. Visual acuity value was examined by a qualified optometrist, and the clinical data were measured by professional clinicians. The distributions of sex, residence and education level of KC patients were compared by Chi-square tests, and the ratios of people wearing glasses and rigid gas permeable (RGP) lenses were compared by McNemar tests. General linear models/Chi-squared tests were used to compare the clinical and demographic data according to KC severity. Spearman’s correlation analysis was used to test the associations between the data and KC severity. The mean age at diagnosis was 20.98 ± 6.06 years, and males had a higher ratio of KC than females (P < 0.001). Patients in rural areas had a higher rate of KC than those in urban areas (P = 0.039), and the proportion of KC patients with a higher education level (above high school) was high (P < 0.001). A total of 68.40% of the patients reported eye rubbing and 3.52% had a positive family history. The percentage of people wearing glasses was higher than that of patients wearing RGP lenses (P < 0.001). The total VF score of KC patients was 69.35 ± 15.25. The thinnest corneal thickness (TCT) and stiffness parameter at the first applanation (SP-A1) values were inversely correlated with KC severity (P < 0.05). The mean, steep, and max keratometry (Km, Ks and Kmax) values, the RGP lens use and keratoplasty were positively correlated with KC severity (all P < 0.05). The total VF score of the eye with better VA decreased as the severity increased (r = − 0.21, P = 0.002). The present study comprehensively describes various associated features of KC patients from a tertiary hospital in Central China, providing a reference for understanding the characteristics of KC patients in China.

scholarly journals Contribution of foods consumed away from home to energy intake in Brazilian urban areas: the 2008–9 Nationwide Dietary Survey

2012 ◽  
Vol 109 (7) ◽  
pp. 1276-1283 ◽  
Author(s):  
Ilana Nogueira Bezerra ◽  
Amanda de Moura Souza ◽  
Rosangela Alves Pereira ◽  
Rosely Sichieri
Keyword(s):  
Total Energy ◽  
Energy Intake ◽  
Food Consumption ◽  
Urban Areas ◽  
Total Energy Intake ◽  
Alcoholic Beverages ◽  
Food Groups ◽  
Dietary Survey ◽  
Home Food ◽  
The Mean

The objectives of the present study were to estimate the dietary contribution of away-from-home food consumption, to describe the contribution of away-from-home foods to energy intake, and to investigate the association between eating away from home and total energy intake in Brazilian urban areas. In the first Brazilian Nationwide Dietary Survey, conducted in 2008–9, food records were collected from 25 753 individuals aged 10 years or older, living in urban areas of Brazil. Foods were grouped into thirty-three food groups, and the mean energy intake provided by away-from-home food consumption was estimated. Linear regression models were used to evaluate the association between away-from-home food consumption and total energy intake. All analyses considered the sample design effect. Of the total population, 43 % consumed at least one food item away from home. The mean energy intake from foods consumed away from home was 1408 kJ (337 kcal), averaging 18 % of total energy intake. Eating away from home was associated with increased total energy intake, except for men in the highest income level. The highest percentage of away-from-home energy sources was for food with a high content of energy, such as alcoholic beverages (59 %), baked and deep-fried snacks (54 %), pizza (42 %), soft drinks (40 %), sandwiches (40 %), and sweets and desserts (30 %). The consumption of foods away from home was related to a greater energy intake. The characterisation of away-from-home food habits is necessary in order to properly design strategies to promote healthy food consumption in the away-from-home environment.

Ficus retusa L. as possible indicator of air metallic pollution in urban environmentSahli Leila, Belhiouani Hadjer

2021 ◽  
Author(s):  
Leila Sahli ◽  
Hadjer Belhiouani
Keyword(s):  
Urban Areas ◽  
Metal Accumulation ◽  
Urban Environments ◽  
Traffic Load ◽  
Polluted Soils ◽  
Lead And Zinc ◽  
Metal Contents ◽  
Accumulation Index ◽  
The Mean ◽  
Metallic Pollution

Abstract The tree species differed by their capacity to capture air-borne dust and to allocate trace element from contaminated soil. The aim of this study was to explore the accumulation potential of heavy metals (HMs) by F. retusa L. and its possible use for air pollution biomonitoring in urban areas. Plant material was sampled along the national roads in Constantine city (NE-Algeria), characterized by an intense traffic load. The concentrations of cadmium, copper, lead and zinc were determined in the washed and unwashed leaves. The mean concentrations of HMs decrease in the following order: Zn > Pb > Cu > Cd for both studied leaves, and were about 0.68 and 0.98 µg/g for Cd, 7.26 and 8.74 µg/g for Cu, 20.35 and 37.61 µg/g for Pb and 63.33 µg/g and 75.94 µg/g for Zn, for washed/unwashed leaves respectively. The studied metal contents were significantly higher than those cited in the literature; this indicates the traffic road impact on HMs emissions and uptake by plants. Higher values of metal accumulation index (MAI) indicate the effectiveness of the studied species for monitoring air metallic pollution in urban areas, and its usefulness for phytoextraction of HMs from the polluted soils and/or air. Results of this study could be beneficial as preliminary reference values for HMs uptake by F. retusa in urban environments.

Abstract P397: Cardiovascular Health Among US Adults In Metropolitan And Micropolitan Statistical Areas

Circulation ◽  
2014 ◽  
Vol 129 (suppl_1) ◽  
Author(s):  
Fleetwood Loustalot ◽  
Jing Fang ◽  
Latetia Moore ◽  
Nilay S Shah ◽  
Linda Schieb
Keyword(s):  
Urban Areas ◽  
Cardiovascular Health ◽  
Vegetable Consumption ◽  
Health Indicators ◽  
Fruit And Vegetable Consumption ◽  
Fruit And Vegetable ◽  
Health Score ◽  
Health Standards ◽  
The Mean ◽  
Reported Data

Background: Cardiovascular disease (CVD) is the leading cause of death in the US and primary risk factors for CVD are well known. Promoting the ideal state of cardiovascular (CV) health factors and behaviors has been previously defined as CV health. The objective of this study is to assess CV health among US adults in urban areas. Methods: Data from the Behavior Risk Factor Surveillance System (BRFSS) 2011 were used for analysis and included 307,101 participants from 198 metropolitan and micropolitan statistical areas (MMSA) with an adequate sample size for estimates (range: 493 to 9,241 participants). Seven indicators were used to define ideal levels of CV health using self-reported data: no hypertension, no diabetes, no high cholesterol, no current smoking, no obesity, and meeting physical activity guidelines and fruit and vegetable consumption targets. Each metric was given a score (0=no, 1=yes) and summed. The percentage achieving ideal CV health (all 7 metrics at ideal level), good CV health (6-7 metrics at ideal levels), poor CV health (0-2 metrics at ideal levels), and the mean CV health score were calculated for each MMSA. Estimates and 95% confidence intervals were age-standardized. Results: Overall, 16.7% (16.4-17.1) and 11.5% (11.2-11.8) of participants among the 198 MMSAs had good and poor CV health, respectively. Few respondents in MMSAs met all ideal CV health standards (<1%), likely driven by the limited number of participants meeting fruit and vegetable consumption targets (5.7%) in this sample. The overall mean CV health score was 3.91 (3.90-3.92). The percentage of participants with good CV health varied from 3.0% (1.5-5.8) (Mobile, AL) to 23.8% (17.0-32.3) (Kalispell, MT). The percentage of participants with poor CV health varied from 6.1% (4.2-8.6) (Boulder, CO) to 26.5% (18.2-36.8) (Kingsport-Bristol-Bristol, TN-VA). The mean CV health score ranged from 3.44 (3.2-3.7) (Kingsport-Bristol-Bristol, TN-VA) to 4.7 (4.5-4.9) (Boulder, CO). Conclusions: Across select US MMSAs, few adults met ideal CV health standards, and only 16% had good CV health. CV health varied significantly across MMSAs. Reducing the burden and mitigating the deleterious effects of CVD can be achieved through the promotion of CV health. Local clinical and public health agencies have the unique opportunity to tailor evidenced-based interventions to promote CV health in their populations. The methodology and findings used in this study can be utilized by local jurisdictions to target lagging health indicators with focused interventions.

Developmental Outcome Prediction From Acoustic Cry Analysis in Term and Preterm Infants

PEDIATRICS ◽  
1987 ◽  
Vol 80 (4) ◽  
pp. 529-534
Author(s):  
Barry M. Lester
Keyword(s):  
Fundamental Frequency ◽  
High Speed ◽  
Infant Development ◽  
Developmental Outcome ◽  
Term Infants ◽  
Perceptual Performance ◽  
The Mean ◽  
Speed Computer ◽  
Potential Use ◽  
Bayley Scales

It has been suggested that the cry may reflect the neurophysiologic integrity of the infant and relate to later developmental outcome. In this study, the cry was recorded at term conceptional age in 18 preterm and 13 term infants using a standardized procedure and analyzed by high-speed computer. At 18 months of age, a significant number of infants were correctly classified as scoring high or low on the Bayley Scales of Infant Development based on the mean and variability in the fundamental frequency, variability in the first formant, and the amplitude of the cry. At 5 years of age, a significant number of infants were correctly classified on the McCarthy General Cognitive Index and on the verbal, perceptual-performance, and quantitative subscales based on the variability of the fundamental frequency, variability of the first formant, and amplitude and duration of the cry. Although preliminary, this study supports the potential use of the cry as a noninvasive measure to detect developmental outcome in the infant at risk.

Sign in / Sign up

Export Citation Format

Share Document