scholarly journals Development of Integrative Methodologies for Effective Excavation Progress Monitoring

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 364
Author(s):  
Abdullah Rasul ◽  
Jaho Seo ◽  
Amir Khajepour
Keyword(s):  
Construction Industry ◽  
Progress Monitoring ◽  
Resistive Index ◽  
Volume Estimation ◽  
Estimation Methods ◽  
Monitoring And Control ◽  
Sensory Data ◽  
Geometric Space ◽  
Experimental Validations ◽  
And Control

Excavation is one of the primary projects in the construction industry. Introducing various technologies for full automation of the excavation can be a solution to improve sensing and productivity that are the ongoing issues in this area. This paper covers three aspects of effective excavation progress monitoring that include excavation volume estimation, occlusion area detection, and 5D mapping. The excavation volume estimation component enables estimating the bucket volume and ground excavation volume. To achieve mapping of the hidden or occluded ground areas, integration of proprioceptive and exteroceptive sensing data was adopted. Finally, we proposed the idea of 5D mapping that provides the info of the excavated ground in terms of geometric space and material type/properties using a 3D ground map with LiDAR intensity and a ground resistive index. Through experimental validations with a mini excavator, the accuracy of the two different volume estimation methods was compared. Finally, a reconstructed map for occlusion areas and a 5D map were created using the bucket tip’s trajectory and multiple sensory data with convolutional neural network techniques, respectively. The created 5D map would allow for the provision of extended ground information beyond a normal 3D ground map, which is indispensable to progress monitoring and control of autonomous excavation.

scholarly journals CONOCIMIENTO NORMATIVO DE LOS MAESTROS DE OBRA, CONTROL DE RECURSOS Y PRESUPUESTO DE OBRA EN LAS CONSTRUCCIONES

2021 ◽  
Vol 8 (16) ◽  
pp. 89-96
Author(s):  
JULIÁN ORTIZ ◽  
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
Monitoring And Control ◽  
Technical Process ◽  
And Control

In the administration of construction processes, methods applicable to all phases of construction projects are constituted, integrating necessary technical processes from the beginning to their completion, among which are the planning,programming, implementation, direction and control of hours, among others. , thus leading an organized and technical process, therefore, the construction industry has generated high competitiveness in terms of cost, time and quality, analyzing the factors that contribute to improving the processes and strategies applicable to this field; However, there have been constant non-compliances in these three factors, evidenced in the untimely delivery of the work due to delays of various kinds. To mitigate these inconveniences, it is essential to monitor, control costs and time of a project. This makes it possible to know if what is planned is in accordance with what has been executed, if the monitoring and correct control is not carried out, there is a risk of not obtaining the results of a project and the planned objectives of the same could not be reached with precision. This allows making decisions on time and executing the project as close as possible to the execution of the budget and monitoring and control of a project are very important when it comes to executing the budget, forecasting and controlling its development.

INFORMATION MANAGEMENT TECHNOLOGIES FOR IMPROVING EARNED VALUE QUANTIFICATION

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Farah Demachkieh ◽  
Mohamed-Asem Abdul-Malak
Keyword(s):  
Data Collection ◽  
Information Technologies ◽  
Progress Monitoring ◽  
Monitoring And Control ◽  
Construction Sites ◽  
Earned Value ◽  
Automated Data Collection ◽  
Project Monitoring ◽  
And Control ◽  
Indoor And Outdoor

Real-time progress tracking of construction activities is critical for successful project monitoring and control. As such, the application of modern information technologies for progress tracking are proclaimed to overcome the limitations of manual approaches and hence contribute to the automated acquisition of onsite data for the computation of the earned value of progressed work. To this end, this paper presents a thorough review of 111 studies dealing with automated data collection and progress tracking on construction sites. The researched technologies were classified into four categories, namely: information technology, geo-spatial, imaging, and augmented reality (AR). It was found that research dealing with progress tracking using imaging technologies has been speedily growing over the years. The findings also revealed that the highest frequency (57) of reported technologies is found to be related to the AR category, with 74 percent of these studies having been published in the last eight years. Moreover, 63 percent of the studies were concerned with all kinds of project activities, with more specific areas of application reported to include concrete and steel elements, MEP elements, indoor and outdoor elements. The encountered technologies are reported to decrease labor hours and the time needed for progress monitoring, and automated data collection on construction activities progress is said to facilitate the generation of status reports and permit the early detection of deviations from the as-planned status.

scholarly journals Discarding of cod in the Danish Fully Documented Fisheries trials

2015 ◽  
Vol 72 (6) ◽  
pp. 1848-1860 ◽  
Author(s):  
Clara Ulrich ◽  
Hans Jakob Olesen ◽  
Heiðrikur Bergsson ◽  
Josefine Egekvist ◽  
Kirsten Birch Håkansson ◽  
...  
Keyword(s):  
Electronic Monitoring ◽  
Estimation Methods ◽  
Management Approach ◽  
Practical Implementation ◽  
Monitoring And Control ◽  
Camera Systems ◽  
Reliable Source ◽  
Quota Management ◽  
And Control

Abstract Denmark was the first nation in Europe to promote the use of Fully Documented Fisheries (FDF) through Remote Electronic Monitoring (REM) and CCTV camera systems, with pilot schemes in place since 2008. In theory, such a scheme could supplement and even potentially replace expensive control and monitoring programmes; and when associated with a catch quota management (CQM) system, incentivize positive changes in fishing patterns in a results-based management approach. New data flows are, however, required to ensure the practical implementation of such a scheme. This paper reviews the quality of the FDF data collected during 2008–2014 and their potential in strengthening information on cod discards. The analyses demonstrate the improved reporting of discards in logbooks and overall discard reductions, but they also show that some uncertainties around the absolute estimates of discard quantities have remained. Regular validation of weight estimation methods and close collaboration between scientific monitoring and control are important to support the use of reported discards as a reliable source of information. We discuss the potential of electronic monitoring in the context of the EU landing obligation.

scholarly journals Methods of monitoring and control of parameters of signals and elements of the mobile communication network when solving the problem of electromagnetic compatibility

2020 ◽  
pp. 3-15
Author(s):  
Yulia Koliadenko ◽  
Mykyta Chursanov ◽  
Oleksii Koliadenko
Keyword(s):  
Mobile Communication ◽  
Electromagnetic Compatibility ◽  
Random Variables ◽  
Random Processes ◽  
Recursive Estimation ◽  
Estimation Methods ◽  
Measured Signal ◽  
Monitoring And Control ◽  
Communication Signals ◽  
And Control

To ensure the electromagnetic compatibility of mobile networks, it is necessary to monitor and control: radio frequency resource, frequency and power of signals in the allocated frequency resource, group delay time, resistance parameters to linear attenuation and attenuation associated with multi-beam signal transmission, polarization signal parameters, location (coordinates) of moving sources. The evaluation of parameters based on the results of measurements is currently carried out based on observations, and decision-making is carried out based on sample statistics. The use of methods for measuring the parameters of network elements and communication signals against the background of thermal noise is proposed. The measurement methods are based on the recursive Robbins-Monroe algorithm for estimating such parameters as random variables and the recursive Kalman-Bussey algorithm for estimating random processes. The efficiency analysis of recursive algorithms of optimal estimation of random variables and random processes is carried out. The advantage of recursive estimation methods is that, in practice, they are more effective than statistical processing methods, as they provide real-time estimation and do not require a waste of time for accumulation and processing. In addition to noise, extraneous signals are concentrated in the spectrum with the measured signal in radio communication channels. This fact determines the problem relevance of extracting from the additive mixture of signals and interference of useful signals that come from measurements. Methods for measuring the parameters of network elements and communication signals in the conditions of external signals have been developed. The possibility of using in the meters of parameters of mobile communication networks adaptive noise compensators with adaptive reference reception channel is considered, reducing the power of extraneous signals by 20 … 30 decibels and more.

Client and contractor roles in schedule incentive/disincentive projects

2019 ◽  
Vol 26 (3) ◽  
pp. 386-407 ◽  
Author(s):  
Abid Hasan ◽  
Kumar Neeraj Jha
Keyword(s):  
Developing Countries ◽  
Construction Industry ◽  
Construction Projects ◽  
Success Factors ◽  
Monitoring And Control ◽  
Content Type ◽  
Senior Project ◽  
Correct Estimation ◽  
And Control ◽  
Project Personnel

PurposeDelays in construction projects can be very expensive due to their adverse effects on project cost and profit margin. To overcome this problem, clients in the construction industry sometimes use schedule incentive/disincentive (I/D) contracting strategy. However, previous studies have shown that inadequate understanding and wrong implementation of schedule I/D provisions could result in unintended results. Moreover, the use of the I/D contracting method is in its initial stages in many countries such as India. The purpose of this paper is to identify various factors that are essential for schedule I/D success in construction projects.Design/methodology/approachA questionnaire survey was conducted among experienced professionals (clients, contractors and consultants) from across the Indian construction industry.FindingsTop success factors related to clients in the descending order of their importance are: realistic targets; detailed guidelines for I/D implementation; close coordination with other stakeholders; correct estimation of I/D duration and amount; and imposing disincentives after due consideration. Meanwhile, factors related to contractor organisations are: continuous monitoring and control; thorough understanding of schedule I/D targets; specific considerations in appointing senior project personnel; effective communication; and proper labour management.Research limitations/implicationsThis empirical research was conducted in the Indian construction industry. Similar studies from developed construction markets may provide more insights into the successful use of schedule I/D provisions in construction projects.Practical implicationsThe uptake of these recommendations is likely to increase the success of schedule I/D provisions in construction projects, especially in developing countries where the use of I/D contracting strategy is not very popular.Originality/valueThis research highlights the specific roles of both clients and contractors in the success of schedule I/D projects in developing countries such as India.

Computers for data, control and simulation

1988 ◽  
Vol 46 ◽  
pp. 920-921
Author(s):  
David C. Joy
Keyword(s):  
Personal Computers ◽  
Monitoring And Control ◽  
Data Logging ◽  
Data Logger ◽  
Operational Conditions ◽  
Data Control ◽  
The Many ◽  
And Control

Personal computers (PCs) are a powerful resource in the EM Laboratory, both as a means of automating the monitoring and control of microscopes, and as a tool for quantifying the interpretation of data. Not only is a PC more versatile than a piece of dedicated data logging equipment, but it is also substantially cheaper. In this tutorial the practical principles of using a PC for these types of activities will be discussed.The PC can form the basis of a system to measure, display, record and store the many parameters which characterize the operational conditions of the EM. In this mode it is operating as a data logger. The necessary first step is to find a suitable source from which to measure each of the items of interest. It is usually possible to do this without having to make permanent corrections or modifications to the EM.

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