Effect of Adjustable Deflectors on Building Facade on Diverting the Distribution of Aerosol in Micro Climate Wind Field

2011 ◽  
Vol 71-78 ◽  
pp. 338-341
Author(s):  
Chih Hong Huang ◽  
Kuang Yu Wang
Keyword(s):  
Urban Space ◽  
Wind Field ◽  
Urban Areas ◽  
Aerosol Particles ◽  
Building Blocks ◽  
Aerosol Concentration ◽  
Street Canyons ◽  
Wind Environment ◽  
Building Facade ◽  
And Control

Aerosol particles in urban areas are deposited in street canyons due to the wind field generated by building blocks. The purpose of this study was to discuss with CFD software the effect on lowering the aerosol concentration in urban space by means of active and auxiliary adjustable wind deflectors installed on the building facade to divert and control the micro-climate wind environment surrounding the buildings. The results suggested that, the wind deflector could produce an enormous improving efficiency for channelizing the particles.

Numerical Simulation of Wind Environment in a Hill and Buildings Configuration

2014 ◽  
Vol 641-642 ◽  
pp. 544-549
Author(s):  
Cheng Jun Shen ◽  
Cui Lan Gao ◽  
Ya Min Song
Keyword(s):  
Numerical Simulation ◽  
Urban Areas ◽  
Street Canyon ◽  
Simple Type ◽  
Correction Algorithm ◽  
Street Canyons ◽  
Wind Environment ◽  
Ambient Wind ◽  
Roof Level ◽  
Volume Method

Numerical simulation of air flow over urban areas is an effective way to analyze and predict the wind environment. This paper presents two dimensional computer model results concerning the effects of buildings and/or a hill on the wind flow. The RANS equations and RNG κ-ε turbulence model used in the simulation are discretized by the finite volume method. The computational solution is based on a pressure correction algorithm of the SIMPLE-type. The inflow boundary conditions are given by wind tunnel experiment. In the presence of only a street canyon formed by two buildings, the ambient wind is accelerated and slightly curved at the roof level. When there exist a hill and a street canyon, the velocity in the canyon is affected by the upwind hill. Another simulation model, which has a hill and two street canyons, is used for comparison. There is a little difference in velocity between a single street canyon and two canyons in the presence of an upwind hill.

scholarly journals Community Perceptions and Knowledge of Modern Stormwater Treatment Assets

Urban Science ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 5
Author(s):  
Hadi Zamanifard ◽  
Edward A. Morgan ◽  
Wade L. Hadwen
Keyword(s):  
Urban Design ◽  
Urban Space ◽  
Urban Areas ◽  
Local Governments ◽  
Urban Runoff ◽  
Community Perceptions ◽  
Stormwater Treatment ◽  
Runoff Water ◽  
Community Acceptance ◽  
Water Sensitive Urban Design

Modern stormwater treatment assets are a form of water sensitive urban design (WSUD) features that aim to reduce the volumes of sediment, nutrients and gross pollutants discharged into receiving waterways. Local governments and developers in urban areas are installing and maintaining a large number of stormwater treatment assets, with the aim of improving urban runoff water quality. Many of these assets take up significant urban space and are highly visible and as a result, community acceptance is essential for effective WSUD design and implementation. However, community perceptions and knowledge about these assets have not been widely studied. This study used a survey to investigate community perceptions and knowledge about stormwater treatment assets in Brisbane, Australia. The results suggest that there is limited community knowledge of these assets, but that communities notice them and value their natural features when well-maintained. This study suggests that local governments may be able to better inform residents about the importance of these assets, and that designing for multiple purposes may improve community acceptance and support for the use of Council funds to maintain them.

scholarly journals High-Resolution Modelling of Thermal Exposure during a Hot Spell: A Case Study Using PALM-4U in Prague, Czech Republic

Atmosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 175
Author(s):  
Jan Geletič ◽  
Michal Lehnert ◽  
Pavel Krč ◽  
Jaroslav Resler ◽  
Eric Scott Krayenhoff
Keyword(s):  
Czech Republic ◽  
Urban Areas ◽  
Heat Exposure ◽  
Thermal Exposure ◽  
Urban Environments ◽  
Cooling Effect ◽  
Spatiotemporal Variability ◽  
Climate Index ◽  
Street Canyons ◽  
General Terms

The modelling of thermal exposure in outdoor urban environments is a highly topical challenge in modern climate research. This paper presents the results derived from a new micrometeorological model that employs an integrated biometeorology module to model Universal Thermal Climate Index (UTCI). This is PALM-4U, which includes an integrated human body-shape parameterization, deployed herein for a pilot domain in Prague, Czech Republic. The results highlight the key role of radiation in the spatiotemporal variability of thermal exposure in moderate-climate urban areas during summer days in terms of the way in which this directly affects thermal comfort through radiant temperature and indirectly through the complexity of turbulence in street canyons. The model simulations suggest that the highest thermal exposure may be expected within street canyons near the irradiated north sides of east–west streets and near streets oriented north–south. Heat exposure in streets increases in proximity to buildings with reflective paints. The lowest heat exposure during the day may be anticipated in tree-shaded courtyards. The cooling effect of trees may range from 4 °C to 9 °C in UTCI, and the cooling effect of grass in comparison with artificial paved surfaces in open public places may be from 2 °C to 5 °C UTCI. In general terms, this study illustrates that the PALM modelling system provides a new perspective on the spatiotemporal differentiation of thermal exposure at the pedestrian level; it may therefore contribute to more climate-sensitive urban planning.

scholarly journals Sugar-Sweetened Beverage Consumption Status and Its Association with Childhood Obesity among Chinese Children Aged 6–17 Years

Nutrients ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 2211
Author(s):  
Qian Gan ◽  
Peipei Xu ◽  
Titi Yang ◽  
Wei Cao ◽  
Juan Xu ◽  
...  
Keyword(s):  
Childhood Obesity ◽  
Urban Areas ◽  
Study Data ◽  
Chinese Children ◽  
Obesity Prevalence ◽  
Older Children ◽  
Sugar Sweetened Beverage ◽  
School Aged Children ◽  
Chinese School ◽  
And Control

Objective: There is a remarkable growth in sugar-sweetened (SSB) production and obesity prevalence among school-aged children in China. This paper describes SSB consumption and its association with obesity among Chinese children aged 6–17 years in 2012. Methods: in total, 25,553 children aged 6~17 years enrolled in the China Nutrition and Health Surveillance 2010–2013 were included in this study. Data of SSB consumption frequency and quantity were obtained from a food frequency questionnaire, and the children’s nutritional status was assessed. Multivariate logistic regression was used to evaluate the association between SSB consumption and obesity status. Results: SSB intake was estimated as 181.0 g/day, occurring 2.2 times/week. Older children, males, children from urban areas, and children with higher socioeconomic status were more likely to consume SSBs. Children who consumed SSBs 1~<5 times/week (11.7%) and >5 times/week (12.9%) were more likely to be overweight/obesity than those who consumed SSBs less than once/week. Conclusion: SSB consumption was common among Chinese school-aged children, especially among males, older children, and children from urban areas. High consumption of SSBs was associated with a higher prevalence of overweight/obesity. Actions and plans are required to reduce SSB consumption and control childhood obesity in China.

scholarly journals Subgraphs of Interest Social Networks for Diffusion Dynamics Prediction

Entropy ◽  
2021 ◽  
Vol 23 (4) ◽  
pp. 492
Author(s):  
Valentina Y. Guleva ◽  
Polina O. Andreeva ◽  
Danila A. Vaganov
Keyword(s):  
Social Networks ◽  
Sampling Method ◽  
Building Blocks ◽  
Global Dynamics ◽  
Diffusion Dynamics ◽  
Different Types ◽  
Prediction And Control ◽  
Path Lengths ◽  
And Control ◽  
Diffusion Prediction

Finding the building blocks of real-world networks contributes to the understanding of their formation process and related dynamical processes, which is related to prediction and control tasks. We explore different types of social networks, demonstrating high structural variability, and aim to extract and see their minimal building blocks, which are able to reproduce supergraph structural and dynamical properties, so as to be appropriate for diffusion prediction for the whole graph on the base of its small subgraph. For this purpose, we determine topological and functional formal criteria and explore sampling techniques. Using the method that provides the best correspondence to both criteria, we explore the building blocks of interest networks. The best sampling method allows one to extract subgraphs of optimal 30 nodes, which reproduce path lengths, clustering, and degree particularities of an initial graph. The extracted subgraphs are different for the considered interest networks, and provide interesting material for the global dynamics exploration on the mesoscale base.

Preparedness for Mitigating Noncommunicable Diseases in Gaindakot Municipality, Nepal: Perspectives of Key informants

2021 ◽  
Vol 6 (1) ◽  
pp. 1320-1324
Author(s):  
Narayan Sapkota ◽  
Damaru Prasad Paneru
Keyword(s):  
Health System ◽  
Health Workforce ◽  
Prevention And Control ◽  
Local Level ◽  
Building Blocks ◽  
Health System Strengthening ◽  
High Morbidity ◽  
Major Public Health Problem ◽  
Screening Services ◽  
And Control

Introduction: Non-communicable Diseases (NCDs) are the major public health problem that leads to high morbidity and mortality in the world including Nepal. Government of Nepal has launched the Multi-sectoral NCD Action Plan in 2014 and established NCD and Injuries Poverty Commission in 2016 for the management and control of NCDs nevertheless the implementation status and its outcomes are not identified till date at the local level. Objectives: To explore the preparedness of the local government for the prevention and control of NCDs at Gaindakot, Nawalpur, Nepal. Methodology: A qualitative study was conducted in the Gaindakot municipality; Nawalpur to document the key informant's perspectives on health system's preparedness to prevent the potential impacts of NCDs. Face to face Indepth interview was performed using open-ended questions. Interview guidelines were prepared on the basis of building blocks of health system. Information was processed basis on thematic analysis. Result: The study revealed that health section has NCD preparedness structure but need to strengthening for the better delivery of health services. The study highlights that screening services and the medicine for major NCDs like hypertension and diabetes were available at local level. Limited budget was allocated and health workforce was not trained for NCDs prevention and control. There was no reporting mechanism for NCD related data from local level. Conclusion: Basic medicine and screening services were provided from the local level to the selected NCDs such as hypertension and diabetes. There was no provision of reporting NCD related information and health workforce were not trained to respond NCDs. Local level health system strengthening is an urgent need to address the increasing burden of NCDs.  

scholarly journals Building The Tree Inventory Application for City of East Jakarta

2019 ◽  
Author(s):  
Bambang Sulistyantara ◽  
Imawan W. Hidayat ◽  
A. Nasirudin Taher ◽  
Hendrawan
Keyword(s):  
Urban Space ◽  
Urban Areas ◽  
Urban Ecosystem ◽  
Essential Elements ◽  
Climatic Conditions ◽  
Easy Access ◽  
Fundamental Function ◽  
Tree Inventory ◽  
The Impact ◽  
The City

Trees are essential elements of an urban space. The presence of trees in urban areas is not only appreciated as physical attribute, but beyond this, it serves a fundamental function in balancing and conserving urban ecosystem. Especially in tropical countries like Indonesia which receive high levels of solar radiation, trees contribute to the protection of urban areas from the impact of excessive micro-climatic conditions. But, the presence of trees sometimes resulted in the accidents for the residences because of broken branches and human injuries. This situation leads the city to prepare a tree inventory system, which is beneficial in giving the information about tree conditions and thus the information that would be useful for tree maintenance activities. The tree inventory on application for the city of East Jakarta was built for this purpose, comprising a tree inventory and easy access to the database. The application connects the database source with the GIS map, so that the users could retrieve information for each kind of data.

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