scholarly journals Estimation of Fugitive Dust Levels on A Construction Site Using Digital Image Information

2018 ◽  
Vol 7 (3.9) ◽  
pp. 75
Author(s):  
Im . ◽  
Sun Young ◽  
Yu . ◽  
Jung Ho
Keyword(s):  
Digital Image ◽  
Construction Site ◽  
Fugitive Dust ◽  
Construction Sites ◽  
Image Information ◽  
Efficient Management ◽  
The Future

Currently, fugitive dust management on construction sites does not focus on prevention but rather seeks ways to control it after occurrence. In order to effectively manage fugitive dust on a construction site, it is necessary to quantify prevent fugitive dust from occurring, and take immediate measures after occurrence. Therefore, this study proposes a technique to estimate the amount of fugitive dust generated on a construction site using digital image information. Based on the results of this study, it is expected that high levels of fugitive dust on construction sites can be prevented in the future and efficient management will be possible. 

scholarly journals Calculation Methods of Emission Factors and Emissions of Fugitive Particulate Matter in South Korean Construction Sites

2020 ◽  
Vol 12 (23) ◽  
pp. 9802
Author(s):  
Hyunsik Kim ◽  
Sungho Tae ◽  
Jihwan Yang
Keyword(s):  
Particulate Matter ◽  
South Korea ◽  
The United States ◽  
Emission Factors ◽  
Construction Workers ◽  
Construction Site ◽  
Fugitive Dust ◽  
Construction Sites ◽  
South Korean ◽  
Pm10 And Pm2.5

Recently, efforts to effectively reduce particulate matter by identifying its sources and trends have become necessary due to the sustained damage it has caused in East Asia. In the case of South Korea, damage due to fugitive dust generated at construction sites in densely populated downtown areas is significant, and particulate matter in such fugitive dust directly influences the health of nearby residents and construction workers. Accordingly, the purpose of the present study was to develop a method for calculating emission factors for PM10 and PM2.5 emission amounts in the fugitive dust generated in construction sites and to derive emission amount trends for major variables to predict the amounts of generated particulate matter. To this end, South Korean emission factors for PM10 and PM2.5 for different construction equipment and activities that generate fugitive dust were derived and a method for calculating the amount of particulate matter using the derived emission factors was proposed. In addition, the calculated total emissions using these factors were compared to those calculated using construction site fugitive dust equations developed for the United States, Europe, and South Korea, and the trend analysis of total emissions according to the major emission factor variables was conducted.

scholarly journals A Rapid Gradation Detection System for Earth and Stone Materials Based on Digital Image

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Shu Yu ◽  
Yanfeng Wen ◽  
Zuyu Chen ◽  
Guoying Zhang ◽  
Yujie Wang ◽  
...  
Keyword(s):  
Digital Image ◽  
Detection System ◽  
Detection Algorithm ◽  
High Accuracy ◽  
Dam Construction ◽  
Construction Site ◽  
Construction Sites ◽  
Edge Detection Algorithm ◽  
Stone Materials ◽  
Transport Vehicle

Gradation has an important influence on the mechanical properties of earth and stone materials after compaction, and a reasonable gradation is the key to ensure compaction quality. In this paper, a set of earth and stone materials gradation detection system based on digital image processing was proposed, which was suitable for detection in the construction sites. The system obtained images which were taken from multiple directions of materials transport vehicle, used the thresholding method to segment the images, detected particle contours through edge detection algorithm of Canny to realize the image recognition of particle size, and drew the gradation curve of earth and rock materials finally. It was verified by selecting limestone aggregates of different gradations, and the results showed high accuracy. The system can realize on-site detection of the earthwork gradation rapidly and accurately at a dam construction site.

Relationship Ending in the Concept of Customer Relationship Management

2015 ◽  
Vol 10 (2) ◽  
pp. 103-113
Author(s):  
Ewa Hajduk-Kasprowicz ◽  
Lech Nieżurawski
Keyword(s):  
Customer Relationship Management ◽  
Relationship Management ◽  
Professional Services ◽  
Customer Relationship ◽  
Modern Literature ◽  
Relationship Dissolution ◽  
Business Relationships ◽  
Efficient Management ◽  
The Future ◽  
The Relationship

The paper discusses the problems of fading and ending of business relationships in the sphere of professional services i.e. the phase of a relationship dissolution resulting from a client's or a firm's decision to end it. This phase includes, among others, determining the causes of the relationship dissolution and drawing conclusions for the future in order to prevent losing the most lucrative clients. Both in theory and in practice, relationship ending is perceived as something stretched in time i.e. consisting of numerous stages and influenced by numerous factors and events.The aim of the present paper is an analysis of the modern literature on the causes and mechanisms of business relationships termination in the sphere of professional services as well as indicating some possibilities of a more effective and efficient management of these relations. 

Development of Coursework on Studying Fugitive Dust from Construction Site Using Optical-type Dust Sensor

2021 ◽  
pp. 1-1
Author(s):  
Minyoung Jeong ◽  
Sarbajit Paul ◽  
Junghwan Chang ◽  
Hak-ki Lee ◽  
Subhas Mukhopadhyay
Keyword(s):  
Construction Site ◽  
Fugitive Dust

scholarly journals Safety Assessment and Risk Management in Indian Building Construction Sites

2019 ◽  
Vol 8 (4S2) ◽  
pp. 8-12
Keyword(s):  
Safety Assessment ◽  
Building Construction ◽  
Construction Site ◽  
Construction Sites ◽  
Safety Measures ◽  
Severity Rating ◽  
Key Factor ◽  
Incident Rate ◽  
Observation Method ◽  
Unsafe Condition

Construction sites records high accident and incident rate due to lack of safety measures. Safety assessment rating is significant for every construction site to know safety status of the particular site. In this research TR safety observation method is used to assess the site performance. As unsafe condition is the key factor in every construction site, this research considers the possible unsafe conditions to assess the site performance. A questionnaire survey is done with the workers to know the existing safe conditions. Results showed that the safety performance of the site is 39%. Then every unsafe condition is ranked with respect to severity rating for detailed analysis. Furthermore bowtie analysis is used to identify the causes and consequences of the unsafe conditions. Through this analysis the owner can reduce the risk of every event and improve the site performance.

scholarly journals Rebar Worker Analysis Using a 3-Axis Accelerometer

2021 ◽  
Vol 7 ◽  
Author(s):  
Takuma Akaki ◽  
Tomoyuki Gondo
Keyword(s):  
Body Movement ◽  
Building Construction ◽  
Accelerometer Data ◽  
Construction Site ◽  
Work Intensity ◽  
Construction Sites ◽  
Repetitive Tasks ◽  
The Difference ◽  
Total Body ◽  
Large Building

The purpose of the present study is to grasp the situation of construction sites easily by distinguishing the movements of construction workers at construction sites from the accelerometer data attached to their waists. For the construction manager to accurately perceive the active or inactive state of his workers, their movements were classified into three distinct categories: walking, standing, and sitting. We tracked and observed two rebar workers for 5 days at a large building construction site. Their movements were classified by two-axis plots of (1) the difference between the maximum and minimum absolute values and (2) the value of acceleration at each second, and visualized by a heatmap among others for this trial. The results showed that despite the difficulty in distinguishing rebar work without a total body movement while sitting, the accuracy of discrimination was 60–80% in walking and sitting. From this analysis, we were able to identify repetitive tasks and the differences between morning and afternoon tasks. Furthermore, by applying simple visualization, we could concisely represent changes in work intensity over a relatively long period.

scholarly journals Strategies for effective management of health and safety in confined site construction

2013 ◽  
Vol 13 (4) ◽  
pp. 50-64 ◽  
Author(s):  
John Spillane ◽  
Lukumon O. Oyedele
Keyword(s):  
Practical Implication ◽  
Health And Safety ◽  
Construction Site ◽  
Construction Sector ◽  
Effective Management ◽  
Construction Sites ◽  
Safety Issues ◽  
Individual Interviews ◽  
Site Design ◽  
Managerial Strategies

Purpose: The overall aim of this research is to identify and catalogue the numerous managerial strategies for effective management of health and safety on a confined, urban, construction site. Design/Methodology/Approach: This is achieved by utilising individual interviews, focus groups discussion on selected case studies of confined construction sites, coupled with a questionnaire survey. Findings: The top five key strategies include (1) Employ safe system of work plans to mitigate personnel health and safety issues; (2) Inform personnel, before starting on-site, of the potential issues using site inductions; (3) Effective communication among site personnel; (4) Draft and implement an effective design site layout prior to starting on-site; and (5) Use of banksman (traffic co-ordinator) to segregate personnel from vehicular traffic. Practical Implication: The construction sector is one of the leading industries in accident causation and with the continued development and regeneration of our urban centres, confined site construction is quickly becoming the norm - an environment which only fuels accident creation within the construction sector. Originality/Value: This research aids on-site management that requires direction and assistance in the identification and implementation of key strategies for the management of health and safety, particularly in confined construction site environments.

scholarly journals Sustainable Ship Loading Planning for Prefabricated Products in the Construction Industry

2020 ◽  
Vol 12 (21) ◽  
pp. 8905
Author(s):  
Wen Yi ◽  
Robyn Phipps ◽  
Hans Wang
Keyword(s):  
Construction Industry ◽  
Large Scale ◽  
Transportation Cost ◽  
Sustainable Transportation ◽  
Construction Site ◽  
Integer Optimization ◽  
Construction Sites ◽  
Capacity Limits ◽  
Proposed Model

This paper focuses on sustainable transportation of prefab products from factories to construction sites by ship. Since the transportation cost for all the prefab products of a construction site is mainly dependent on the number of cargo holds used on ships, a loading plan for prefab products that minimizes the number of holds required is highly desirable. This paper is therefore devoted to the development of an optimal loading plan that decides which prefab products are loaded into each cargo hold and how to pack these prefab products into the holds so that as few holds as possible are used. We formulate the problem as a large-scale integer optimization model whose objective function is to minimize the total number of cargo holds used and whose constraints represent the cargo hold capacity limits. We develop a heuristic to solve the problem and obtain a high-quality solution. We have tested the model and algorithm on a case study that includes 20 prefab products. We find that different cargo holds carry prefab products that have quite different densities. Moreover, the orientations of many prefab products are different from their default orientations. The results demonstrate the applicability of the proposed model and algorithm.

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