scholarly journals The Design of an Urban Roadside Automatic Sprinkling System: Mitigation of PM2.5–10 in Ambient Air in Megacities

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Shiyong Liu ◽  
Konstantinos Triantis ◽  
Lan Zhang
Keyword(s):  
System Architecture ◽  
Winter Season ◽  
Ambient Air ◽  
Street Dust ◽  
Conceptual System ◽  
The Road ◽  
Research Areas ◽  
Winter Road ◽  
And Function ◽  
Constituent Elements

The objective of this research paper is to describe the system architecture for an urban roadside automatic mist-generating system. Its primary purpose is to mitigate particulate matter especially PM2.5–10. In this paper, four graphs are provided to exhibit the constituent elements of this system. This paper also discusses the functional extensions of this system for alternative uses in civil engineering which include winter road deicing and desnowing with added salt; clean-up of street dust; lowering of temperature of a “hot island” during the summer; the addition of humidity in an arid area; and the suppression of flu virus in the winter season. The structure and function of this system are comprehensively discussed in this paper. This system is compared to existing and other proposed systems in terms of control options, efficiency, and primary functional issues. The unique design of the road automatic sprinkling system renders itself a prominent option. Although there are no data available for this conceptual system, some expected qualitative and quantitative outcomes are provided and justified. The paper concludes with some potential research areas and challenges associated with this system architecture.

scholarly journals A case study of combined winter road snow plowing and de-icer spreading

2017 ◽  
Vol 44 (12) ◽  
pp. 1005-1013 ◽  
Author(s):  
Olivier Quirion-Blais ◽  
André Langevin ◽  
Martin Trépanier
Keyword(s):  
Neighborhood Search ◽  
Problem Analysis ◽  
Winter Maintenance ◽  
The Road ◽  
Snow Plowing ◽  
Winter Road ◽  
Turn Restrictions ◽  
Maintenance Problem

In this article, we address a winter maintenance problem where the streets need to be plowed and gritted in a sequence that depends on the class of the road. The maintenance fleet includes vehicles equipped for plowing, some for spreading, and some for both at once. The objective is to complete the operations as rapidly as possible while considering street hierarchy, turn restrictions, heterogeneous speeds, and street–vehicle compatibility. An adaptive large neighborhood search framework is developed to solve the problem. Analysis of the results obtained can provide both a good basis for vehicle routing and help managers plan long-term policies and investments.

scholarly journals Analyzing the Formation Mechanism of Cross-City Transportation Network Resilience

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Liang Wang ◽  
Xiaolong Xue ◽  
Weirui Xue ◽  
Beile Zhao
Keyword(s):  
Theoretical Model ◽  
Formation Mechanism ◽  
Transportation Network ◽  
Network Resilience ◽  
Railway Network ◽  
Network Nodes ◽  
General Meaning ◽  
Important Position ◽  
And Function ◽  
Constituent Elements

The formation mechanism of cross-city transportation network resilience occupies an important position in cross-city transportation network resilience management. This study analyzes the constituent elements of the cross-city transportation network and their interrelationships, and the connotation of cross-city transportation network resilience is defined from the general meaning of system resilience. Combining with the connotation of cross-city transportation network resilience, the specific formation process of cross-city transportation network resilience is analyzed and summarized from three stages, including resisting disturbance, absorbing disturbance, and function recovery. Taking cross-city transportation network nodes and systems as specific objects, the static and dynamic formation path of cross-city transportation network resilience is condensed. Based on the standard linear solid model, a theoretical model is constructed and solved for revealing the formation mechanism of cross-city transportation network resilience. Finally, the theoretical model of cross-city transportation network resilience proposed in this study is used for analyzing the China railway network resilience.

scholarly journals Assessment model of levels for winter road maintenance

2017 ◽  
Vol 12 (2) ◽  
pp. 127-134 ◽  
Author(s):  
Tomas Ratkevičius ◽  
Alfredas Laurinavičius
Keyword(s):  
Traffic Accidents ◽  
Assessment Model ◽  
Road Maintenance ◽  
The Road ◽  
Road Users ◽  
Foreign Countries ◽  
Winter Road ◽  
Winter Time ◽  
National Significance ◽  
Winter Road Maintenance

The limited funding for the road industry leads to economizing in the planning of road network maintenance, to identifying the appropriate priorities of the activities with the greatest benefit for the society. The level of maintenance is the direct assessment of the road operation and maintenance service provided to the road users; it directly affects the road maintenance and for road users costs the better is road maintenance, the road users incur the fewerexpenses and vice versa. Insufficient road maintenance in the winter time causes not only the danger of traffic accidents but also worsens the driving conditions, increases the fuel consumption, vehicle depreciation, transportation becomes more expensive. Many results of studies showed that the current choice of maintenance levels in the winter time taking into account only the road category and traffic volume does not ensure the indicators of the most advanced world countries and road functional purpose. The principle of the minimal expenses for the society should be the main criterion in identifying the optimal levels of winter road maintenance. The experience of Lithuania and foreign countries helped in creating the model of assessment of winter maintenance levels for Lithuanian roads of national significance, which can be applied in the other foreign countries as well. This model could be an effective tool for the selection of the optimal maintenance levels, which would economically substantiate the winter road maintenance strategy, that best corresponds to the needs of the society.

scholarly journals Forecasting of Daily PM10 Concentrations in Brno and Graz by Different Regression Approaches

2016 ◽  
Vol 41 (4) ◽  
Author(s):  
Ernst Stadlober ◽  
Zuzana Hübnerová ◽  
Jaroslav Michálek ◽  
Miroslav Kolář
Keyword(s):  
Linear Regression ◽  
Generalized Linear Models ◽  
Linear Models ◽  
Prediction Models ◽  
Winter Season ◽  
Ambient Air ◽  
Quality Measures ◽  
Limit Value ◽  
Two Cities ◽  
Daily Pm10

Brno and Graz, the second largest cities of their countries, observe in each winter season PM10 concentrations of daily means which regularly exceed the limit value of 50 ?g/m3. This is mainly caused by unfavorable dissemination conditions of the ambient air. Hence, partial regulation measureshave to be taken in Brno and Graz where specific decisions for certain regulations may be based on the average PM10 concentration of the next day provided that reliable forecasts of these values are available. For several sites in the two cities we establish forecasts of daily PM10 concentrations based onmultiple linear regression and generalized linear models utilizing both measured covariates of the present day and meteorological forecasts of the next day. The comparisons, based on different quality measures demonstrate the usefulness of both model approaches as they yield results of similar quality.Our prediction models may support future decisions concerning possible traffic restrictions or other regulations.

scholarly journals AIR POLLUTION TOLERANCE INDEX OF SOME SELECTED GYMNOSPERM SPECIES ALONG THE ROAD SIDE OF KATHMANDU VALLEY, NEPAL

2017 ◽  
Vol 24 ◽  
pp. 13-19 ◽  
Author(s):  
Jaya Prakash Hamal ◽  
Mukesh Kumar Chettri
Keyword(s):  
Air Pollution ◽  
Winter Season ◽  
Kathmandu Valley ◽  
Tolerance Index ◽  
Pinus Roxburghii ◽  
Cedrus Deodara ◽  
The Road ◽  
Pollution Tolerance ◽  
Air Pollution Tolerance Index ◽  
Polluted Sites

Response of plants towards air pollution is assessed by air pollution tolerance index (APTI). Four species of Gymnosperms (Thuja orientiales, Cedrus deodara, Pinus roxburghii and Araucaria bidwillii) were evaluated for APTI. Leaves were collected during winter season from polluted sites (Airport, Dhumbarahi, Jawalakhel, Ratnapark, and Sankhapark) and less polluted site (Narayanthan) of Kathmandu valley. Of four gymnosperm species collected from road side, all species (Cedrus deodara, Araucaria bidwillii, Thuja orientiales and Pinus roxburghii) showed high value of APTI (i.e., more than 8), indicating their resistance to air pollution.ECOPRINT 24: 13-19, 2017

Day-to-day variations in paddy-residue burning and residential heating emissions control aerosol pollution peaks in rural north-west India

2021 ◽  
Author(s):  
Harshita Pawar ◽  
Baerbel Sinha
Keyword(s):  
Air Quality ◽  
Large Scale ◽  
Learning Algorithm ◽  
Low Cost ◽  
Winter Season ◽  
Ambient Air ◽  
Rural Site ◽  
North West ◽  
Daily Average ◽  
Residential Heating

<p>November onwards, the poor air quality over north-west India is blamed on the large-scale paddy residue burning in Punjab and Haryana. However, the emission strength of this source remains poorly constrained due to the lack of ground-based measurements within the rural source regions. In this study, we report the particulate matter (PM) levels at Nadampur, a rural site in the Sangrur district of Punjab that witnesses rampant paddy residue burning, using the Airveda low-cost PM sensors from October to December 2019. The raw PM measurements from the sensor were corrected using the Random Forest machine learning algorithm. The daily average PM<sub>10</sub> and PM<sub>2.5</sub> mass concentration at Nadampur correlated well  (r > 0.7) with the daily sum of VIIRS fire counts. Agricultural activities, including paddy residue burning and harvesting operations, contributed less than 40% to the overall PM loading, even in the peak burning period at Nadampur. We show that the increased residential heating emissions in the winter season have a profound and currently neglected impact on ambient air quality. A dip in the daily average temperature by 1 ºC increased the daily emission of PM<sub>10</sub> by 6.3 tonnes and that of PM<sub>2.5</sub> by 5.8 tonnes. Overall, paddy harvest, local and regional paddy residue burning, residential heating emissions, ventilation, and wet scavenging could explain 79% of the variations in PM<sub>10</sub> and 85% of the variations in PM<sub>2.5</sub>. Day to day variations in PM emissions from residential heating in response to the ambient temperature must be incorporated into emission inventories and models for accurate air quality forecasts.</p>

Gathering Road Safety Critical Information From Users

2017 ◽  
pp. 227-242
Author(s):  
Ahmet Yıldız
Keyword(s):  
Road Safety ◽  
Traffic Accidents ◽  
Geographical Information ◽  
Core Element ◽  
Great Opportunity ◽  
Safety Critical ◽  
The Road ◽  
Research Areas ◽  
Road Users ◽  
Road Data

Traffic roads are a core element of GIS and many volunteered systems like openstreetmaps have the goal to make road data publicly available. Road users collecting geographical information and sharing them according some rules are a great opportunity to make our roads a safer place. Traffic accidents are a major cause of death and with increase in urbanization and motorization the risk is expected to rise higher. Research regarding road safety is mostly reactive; sections of the road where a lot of accidents has already happened are investigated and possibly causes are identified and then improved. This means, that people have to die in order to make those road sections safe. The system described in this chapter is a proactive method and can be operated by the community or some responsible authority. The gathered data is also very useful for different research areas like social sciences or civil engineering.

scholarly journals A Geostatistical Investigation into the Effective Spatiotemporal Coverage of Road Weather Information Systems in Alberta, Canada

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Xu Wang ◽  
Lian Gu ◽  
Tae J. Kwon ◽  
Tony Z. Qiu
Keyword(s):  
Information Systems ◽  
Weather Conditions ◽  
Road Maintenance ◽  
The Road ◽  
Weather Information ◽  
Geostatistical Approach ◽  
Adverse Weather ◽  
Winter Road ◽  
Winter Road Maintenance

Inclement weather acutely affects road surface and driving conditions and can negatively impact traffic mobility and safety. Highway authorities have long been using road weather information systems (RWISs) to mitigate the risk of adverse weather on traffic. The data gathered, processed, and disseminated by such systems can improve both the safety of the traveling public as well as the effectiveness of winter road maintenance operations. As the road authorities continue to invest in expanding their existing RWIS networks, there is a growing need to determine the optimal deployment strategies for RWISs. To meet such demand, this study presents an innovative geostatistical approach to quantitatively analyze the spatiotemporal variations of the road weather and surface conditions. With help of constructed semivariograms, this study quantifies and examines both the spatial and temporal coverage of RWIS data. A case study of Alberta, which is one of the leaders in Canada in the use of RWISs, was conducted to indicate the reliability and applicability of the method proposed herein. The findings of this research offer insight for constructing a detailed spatiotemporal RWIS database to manage and deploy different types of RWISs, optimize winter road maintenance resources, and provide timely information on inclement road weather conditions for the traveling public.

Ghettos in Slovakia. Confronting Roma Social and Enviromental Exclusion

2014 ◽  
Vol 36 (2) ◽  
Author(s):  
Richard Filčák ◽  
Tamara Stager
Keyword(s):  
Local Governments ◽  
Racial Segregation ◽  
Field Research ◽  
Social Processes ◽  
Policy Framework ◽  
Roma Population ◽  
Extensive Field ◽  
And Function ◽  
Constituent Elements ◽  
Economic Standpoint

AbstractMore than half of the Roma population in Slovakia lives in spaces that are segregated or separated from dominant non-Roma communities. The socio-spatial marginalization of Roma is both generated and reinforced through open and discrete social processes and measures largely orchestrated by local governments, enabled by an ineffective state; and reinforced by the general socio-economic policy framework. This article builds on extensive field research on predominantly Roma-occupied spaces (i.e., ‘settlements’) in Slovakia and focuses on the nature and function of Roma segregation and separation in Slovakia from an ecological socio-political, and economic standpoint. Based on Loi’c Wacquant’s work on ethno-racial segregation and the concept of environmental justice, we discuss social and environmental discrimination as one of the constituent elements in understanding Roma socio-spatial marginalization and its functions, and employ the neologism, ‘hyper-osada’ as a tool to conceptually and analytically investigate the; new impetus and recent trajectory of Roma segregation and separation.

Evaluation of the productivity of the hybrid vine Seyval blanc in function of several types of protection against frost in Quebec

OENO One ◽  
2003 ◽  
Vol 37 (1) ◽  
pp. 1
Author(s):  
T. Telebak ◽  
Yvon Jolivet ◽  
Jean-Marie Dubois
Keyword(s):  
Mortality Rate ◽  
Snow Cover ◽  
Sugar Content ◽  
Winter Season ◽  
Ambient Air ◽  
Bare Soil ◽  
Climatic Conditions ◽  
The Other ◽  
Potential Yield ◽  
Natural Snow

<p style="text-align: justify;">In Quebec, winter frost is one of the determining factors influencing vine survival and yield. To evaluate the quality of the different types of winter protection, ground temperature data under different covers (ground knolls, leaf mounds, carried over snow and natural snow) and ambient air temperatures were recorded. Results show that the Seyval blanc, if not protected against winter frost, can sustain quite serious damages when the air temperature reaches -30 °C. Ridging, leaf covering and the natural snow cover as well as carried over snow have a positive effect on ground temperatures, since over the site without protection, frost penetrated down to a depth of 50 cm. However, it seems that the root System did not sustain significant damages from the ground frost since regrowth occurred in the Spring. Because of its direct exposure to radiation and surface climatic conditions, bare soil warms up more quickly in the Spring compared to the other sites benefiting from protection. Results also indicate that the mortality rate of the vine stock fruit buds without protection is nearly 100 % compared to the protected vine stocks with a fruit bud mortality rate varying from 22.5 to 35.8 %. The protected vine stocks, regardless of the type of protection used, had satislactory yields from 7.2 t/ha to 24.4 t/ha. On the other hand, the raisin yield of the vine stocks without any winter protection is null. The best raisin yields were obtained over sites where vine stocks were protected by ridging (40 cm of earth), while the vine stocks protected by leaf covering showed an average yield. We also observed that when vine stock leaf covering is coupled with lodged vine shoots, raisin yields are higher than when the vine shoots are erect. However, in both cases, potential yield per hectare is satisfactory. Hence, the lodging of vine shoots becomes a useless operation. The vine stocks protected by natural snow as well as by leaf covering (30 cm + carried over snow and lodged vine shoots) gave the fruit with the highest sugar content. Snow is also an excellent insulator because a 37 cm high snow cover permitted the survival of the vine stocks protected by snow even when the temperature reached -30 °C. The only problem still posing a threat is snow cover variability during the winter season. A reduced snow cover, coupled with temperature conditions under the threshold of tolerance of the vine to cold, could not insure satisfactory protection ol the fruit buds.</p>

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