PLANNING CONSTRUCTION EXECUTION IN THE ENGINEERING PRE-CONSTRUCTION SYSTEM

2011 ◽  
Vol 3 (3) ◽  
pp. 123-135
Author(s):  
Odeta Viliūnienė ◽  
Loreta Inokaitytė
Keyword(s):  
Project Management ◽  
Rational Design ◽  
Rapid Development ◽  
Management Technique ◽  
Main Role ◽  
Construction Work ◽  
Mathematical Methods ◽  
Design Solutions ◽  
And Control ◽  
Construction Works

The article analyzes an efficient method for planning the execution of construction work. Construction companies are looking for ways to reduce the essential factors in executing the construction work project, i.e. cost and time influencing the forthcoming company’s operating results are offered to perform engineering pre-construction activities. Engineering pre-construction is a set of technical, legal, economic, technological and organisational measures that shall ensure a consistent start of construction and a rhythmical organisation of major construction works employing optimum technology. Engineering pre-construction provides great potential for working out rational design solutions with respect to the execution of construction works applying a range of methods for assessing the aforesaid solutions. In this case, mathematical methods play the main role. Mathematical methods enable more effective tackling of the execution issues of construction works as well as developing rational design solutions with respect to the execution of construction works (Janušaitis, Juodis 2001; Juodis, Apanaviciene 2003; Viliuniene, Juodis 2002; Malinauskas, Kalibatas 2005; Viliūnienė, Viliūnas 2005; Viliuniene, Viliunas 2007; Žiogas, Juočiūnas 2005; Janusz, Kapliński 2006; Zavadskas et al. 2009; Šiškina et al. 2009; Medeliene, Ziogas 2010). Practical implementation of such solutions in the course of executing construction works would allow cutting down construction costs and construction time by 15–25% and 16–25% respectively (Viliūnienė, Viliūnas 2005). Besides, the rapid development of computer technology enables both faster preparation of rational design solutions to construction works through the application of mathematical methods and integration thereof into special software packages designed for construction management. Therefore, contractors should realise the significance of engineering pre-construction that is especially important to the execution of expensive large-scale projects. The process of construction execution should be improved applying the project management technique that helps to achieve the set goal within a limited time and with the optimum usage of limited resources. The objective of project management is to plan, organise and control project resources in order to implement the goals of the project. Hence, engineering pre-construction should be considered as an individual construction project stage acting as an engine for planning construction execution, organisation and control, thereby enabling a construction company to focus on profitable results. The article presents the methodology for preparing design solutions to the execution of construction work, which is adapted to handle the practical issues of engineering a pre-construction stage. The execution of complex earth works has been chosen as the subject matter of research.

scholarly journals Inverse Analysis and Modeling for Tunneling Thrust on Shield Machine

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Qian Zhang ◽  
Yilan Kang ◽  
Zheng Zheng ◽  
Lihui Wang
Keyword(s):  
Data Analysis ◽  
Inverse Analysis ◽  
Rational Design ◽  
Rapid Development ◽  
Scientific Basis ◽  
Measured Data ◽  
Engineering Systems ◽  
Shield Tunneling ◽  
Complex Engineering ◽  
And Control

With the rapid development of sensor and detection technologies, measured data analysis plays an increasingly important role in the design and control of heavy engineering equipment. The paper proposed a method for inverse analysis and modeling based on mass on-site measured data, in which dimensional analysis and data mining techniques were combined. The method was applied to the modeling of the tunneling thrust on shield machines and an explicit expression for thrust prediction was established. Combined with on-site data from a tunneling project in China, the inverse identification of model coefficients was carried out using the multiple regression method. The model residual was analyzed by statistical methods. By comparing the on-site data and the model predicted results in the other two projects with different tunneling conditions, the feasibility of the model was discussed. The work may provide a scientific basis for the rational design and control of shield tunneling machines and also a new way for mass on-site data analysis of complex engineering systems with nonlinear, multivariable, time-varying characteristics.

The Protective Effects of Green Tea Catechins in the Management of Neurodegenerative Diseases: A Review

2019 ◽  
Vol 16 (1) ◽  
pp. 57-65 ◽  
Author(s):  
Tahereh Farkhondeh ◽  
Hanieh Shaterzadeh Yazdi ◽  
Saeed Samarghandian
Keyword(s):  
Neurodegenerative Diseases ◽  
Signaling Pathways ◽  
Green Tea ◽  
Molecular Mechanisms ◽  
Main Role ◽  
Related Factor ◽  
Protective Effects ◽  
Tea Catechins ◽  
Green Tea Catechins ◽  
And Control

Background: The therapeutic strategies to manage neurodegenerative diseases remain limited and it is necessary to discover new agents for their prevention and control. Oxidative stress and inflammation play a main role in the pathogenesis of neurodegenerative diseases. The aim of this study is to review the effects of green tea catechins against the Neurodegenerative Diseases. Methods: In this study, we extensively reviewed all articles on the terms of Green tea, catechins, CNS disorders, and different diseases in PubMed, Science Direct, Scopus, and Google Scholar databases between the years 1990 and 2017. Results: The present study found that catechins, the major flavonoids in green tea, are powerful antioxidants and radical scavengers which possess the potential roles in the management of neurodegenerative diseases. Catechins modulate the cellular and molecular mechanisms through the inflammation-related NF-&amp;#954;B and the nuclear factor erythroid 2-related factor 2 (Nrf2) signaling pathways. Conclusion: The findings of the present review shows catechins could be effective against neurodegenerative diseases due to their antioxidation and anti-inflammation effects and the involved biochemical pathways including Nrf2 and NF-kB signaling pathways.<P&gt;

On the devaluation of expert opinion or why do we need a law about the basics of expert activity

2020 ◽  
Vol 22 (3) ◽  
pp. 19-24
Author(s):  
MARAT R. BIKTIMIROV ◽  
◽  
OLGA V. PILIPENKO ◽  
MAXIM S. SAFONOV ◽  
◽  
...  
Keyword(s):  
Project Management ◽  
Structural Analysis ◽  
Expert Opinion ◽  
Knowledge Economy ◽  
Rapid Development ◽  
Digital Technologies ◽  
Accurate Assessment ◽  
Industrial Management ◽  
The Impact ◽  
Creative Construction

Taking practical responsible decisions in the field of social and industrial management in the context of rapid development of digital technologies in the era of the knowledge economy is impossible without reliance on expertise. A kind of organization of activities for the production of ‘predictions’ is required, when not only an accurate assessment of the impact of certain factors and their possible interactions with each other is given, but also as a result of creative construction of scenarios for the development of processes and events, an understanding comes which factors need to be taken into account. At the same time, the expertise constantly faces criticism, calling the conclusions of experts arbitrary, unreliable and subjective. Often, expertise is confused with monitoring, evaluation, diagnosis, inspection or counseling. The authors of the article carried out a structural analysis of the content of the expertise processes in the project management vector in the digitalization era and came to the conclusion that the effectiveness of the expertise is significantly increased in case of clear regulation of this type of activity, providing the necessary status.

Remote Wireless Network Monitoring Application System

2012 ◽  
Vol 433-440 ◽  
pp. 7024-7028
Author(s):  
Hui Fu ◽  
Bin Jin ◽  
Lin Han ◽  
Zuo Tang Tao
Keyword(s):  
Wireless Network ◽  
Remote Monitoring ◽  
Rapid Development ◽  
Self Monitoring ◽  
Information Display ◽  
Remote Monitoring System ◽  
Encrypt Data ◽  
And Control ◽  
Embedded Applications ◽  
Monitoring Application

With computer technology, communication technology and the rapid development of electronic technology, remote monitoring technology will be more widely used for data transmission requirements and more stringent. GPRS-based remote monitoring system, which is based in communications equipment, through the server to PC, as the remote control platform, embedded applications, network programming and other technology, the remote information display and control. Throughout the system, users can allow each terminal in the case of permission to accept the data on the changes and settings. Wireless network communication is important that the network transmission of data security and consistency, to solve this problem this thesis, performance of network communications software technology to achieve self-monitoring and self-recovery, while use of end to end encryption to encrypt data on the transmission , which can guarantee data reliability, completeness, real time and security.

State tools for the development of entrepreneurial activity in the agrarian sphere

2021 ◽  
Vol 7 (3B) ◽  
pp. 125-138
Author(s):  
Yuliia Nesterchuk ◽  
Petro Bechko ◽  
Ruslan P. Mudrak ◽  
Serhii Sokoliuk ◽  
Liudmyla Melnyk
Keyword(s):  
Comparative Analysis ◽  
Innovation System ◽  
Entrepreneurial Activity ◽  
Total Production ◽  
Mathematical Methods ◽  
State Support ◽  
Agrarian Sector ◽  
Production Value ◽  
And Control ◽  
Domestic Regulation

The aim of the work is to establish effective state instruments of development of entrepreneurial activity in the agrarian sector of Ukraine. For the realization of the purpose was used a number of economic-mathematical methods of analysis by panel data of EU and OECD countries for the period 1986-2020: regression modeling of relationships between the total value of agrarian production and total support, rendered to agrarian sector, types and structural volumes of such support; regression dependence statistics, methods of comparative analysis and graphics analysis. The results allowed us to establish that the change in the total production value of the agrarian sector by 96,79% is determined by the types and structural volumes of state support provided to the agrarian sector. For the development of entrepreneurial activity in the agrarian sector of Ukraine it is advisable to activate state support of knowledge and innovation system, infrastructure of agrarian sphere and optimize measures of inspection and control, significantly prevail among the tools of domestic regulation of the agrarian sphere.

Control of project data and team satisfaction as results of PMO effort in new product development projects

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sanderson César Macêdo Barbalho ◽  
Gladston Luiz Silva
Keyword(s):  
Project Management ◽  
Product Development ◽  
New Product Development ◽  
Portfolio Management ◽  
New Product ◽  
Success Factor ◽  
Content Type ◽  
Team Satisfaction ◽  
Project Data ◽  
And Control

PurposeThis paper aims to explore how new product development (NPD)-based project management offices (PMOs) work, their drivers to deliver performance and their project success impact.Design/methodology/approachThe study used a survey of 35 Brazilian and multi-national companies that identified the effort to perform a list of PMO functions, some PMO drivers in the company and five project performance perception indicators. The authors apply a specific set of statistics to uncover the relations between these dimensions of interest.FindingsThe factorial analysis allows us to find the main functions influencing each other. The project teams’ perception of project management (PM) performance is suggested as a success factor that drives PMOs when working on portfolio management issues, managing project files and promoting PM over the company.Practical implicationsThis paper contributes to a contingency approach for designing a project machine involving PMOs to support NPD projects. Managers can set the most suitable PMO functions avoiding mimicry when structuring their NPD efforts.Originality/valuePMOs have impacted team satisfaction and control of project data but not indicators related to triple constraints.

Integrating critical chain project management with last planner system for linear scheduling of modular construction

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tarek Salama ◽  
Ahmad Salah ◽  
Osama Moselhi
Keyword(s):  
Project Management ◽  
Control Procedure ◽  
Modular Construction ◽  
Content Type ◽  
Linear Scheduling ◽  
Last Planner System ◽  
Critical Chain Project Management ◽  
Last Planner ◽  
And Control ◽  
Critical Chain

Purpose The purpose of this paper is to present a new method for project tracking and control of integrated offsite and onsite activities in modular construction considering practical characteristics associated with this type of construction. Design/methodology/approach The design embraces building information modelling and integrates last planner system (LPS), linear scheduling method (LSM) and critical chain project management (CCPM) to develop tracking and control procedures for modular construction projects. The developed method accounts for constraints of resources continuity and uncertainties associated with activity duration. Features of proposed method are illustrated in a case example for tracking and control of modular projects. Findings Comparison between developed schedule and Monte Carlo simulation showed that baseline duration generated from simulation exceeds that produced by developed method by 12% and 10% for schedules with 50% and 90% confidence level, respectively. These percentages decrease based on interventions of members of project team in the LPS sessions. The case example results indicate that project is delayed 5% and experienced cost overrun of 2.5%. Originality/value Developed method integrated LPS, LSM and CCPM while using metrics for reliability assessment of linear schedules, namely, critical percent plan complete (PPCcr) and buffer index (BI). PPCcr and BI measure percentage of plan completion for critical activities and buffer consumption, respectively. The developed method provides a systematic procedure for forecasting look-ahead schedules using forecasting correction factor Δt and a newly developed tracking and control procedure that uses PPCcr and BI. Quantitative cost analysis is also provided to forecast and monitor project costs to prove the robustness of proposed framework.

A Blockchain-Enabled Approach for Online Stream Sensor Data Protection in Cyber-Physical Manufacturing Systems

2021 ◽  
Author(s):  
Zhangyue Shi ◽  
Chenang Liu ◽  
Chen Kan ◽  
Wenmeng Tian ◽  
Yang Chen
Keyword(s):  
Information Technologies ◽  
Manufacturing Systems ◽  
Rapid Development ◽  
Data Access ◽  
Sensor Data ◽  
False Alarms ◽  
Monitoring And Control ◽  
Stream Data ◽  
Physical Security ◽  
And Control

Abstract With the rapid development of the Internet of Things and information technologies, more and more manufacturing systems become cyber-enabled, which significantly improves the flexibility and productivity of manufacturing. Furthermore, a large variety of online sensors are also commonly incorporated in the manufacturing systems for online quality monitoring and control. However, the cyber-enabled environment may pose the collected online stream sensor data under high risks of cyber-physical attacks as well. Specifically, cyber-physical attacks could occur during the manufacturing process to maliciously tamper the sensor data, which could result in false alarms or failures of anomaly detection. In addition, the cyber-physical attacks may also illegally access the collected data without authorization and cause leakage of key information. Therefore, it becomes critical to develop an effective approach to protect online stream data from these attacks so that the cyber-physical security of the manufacturing systems could be assured. To achieve this goal, an integrative blockchain-enabled method, is proposed by leveraging both asymmetry encryption and camouflage techniques. A real-world case study that protects cyber-physical security of collected stream data in additive manufacturing is provided to demonstrate the effectiveness of the proposed method. The results demonstrate that malicious tampering could be detected in a relatively short time and the risk of unauthorized data access is significantly reduced as well.

scholarly journals Design of SnO2 Aggregate/Nanosheet Composite Structures Based on Function-Matching Strategy for Enhanced Dye-Sensitized Solar Cell Performance

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1774 ◽  
Author(s):  
Dongting Wang ◽  
Shangheng Liu ◽  
Mingfa Shao ◽  
Jinghan Zhao ◽  
Yukun Gu ◽  
...  
Keyword(s):  
Composite Structures ◽  
Rapid Development ◽  
Dye Sensitized Solar Cells ◽  
Strong Light ◽  
Solar Cell Performance ◽  
Dye Sensitized ◽  
Drying Treatment ◽  
Matching Strategy ◽  
Sno2 Nanosheet ◽  
And Control

Hierarchical SnO2 nanocrystallites aggregates (NAs) were prepared with a simple room temperature–based aqueous solution method followed by simple freeze-drying treatment. The as-prepared SnO2 NAs were subsequently combined with SnO2 nanosheet–based structures from the viewpoint of a function-matching strategy, and under an optimized condition, a power conversion efficiency (PCE) of 5.59% was obtained for the resultant hybrid photoanode, a remarkable 60% enhancement compared to that of dye-sensitized solar cells (DSCs) fabricated with bare SnO2 NAs architecture. The significantly enhanced efficiency can be attributed to the combination of the desirable electron transport property obtained by the intentionally introduced SnO2 nanosheets (NSs) and the effectively retained inherent characteristics of SnO2 NAs, i.e., large surface area and strong light-scattering effect. This work provides a promising approach for the rapid development of highly efficient SnO2 photoanode film-based DSCs with the properties of simplicity of operation and control over the photoanode composition.

Analysis and Application of BIM Technology in the Project Goal Control

2013 ◽  
Vol 671-674 ◽  
pp. 2978-2981 ◽  
Author(s):  
Ding Tang Wang
Keyword(s):  
Project Management ◽  
Large Data ◽  
The Real ◽  
Virtual Construction ◽  
Potential Problems ◽  
Project Construction ◽  
Visualization Technology ◽  
And Control

BIM is a method which is based on the integration of digitalization technology and visualization technology to manage information related project construction. This paper states the build process of imitating reality by using BIM’s visualization technology with multi-dimension and large data, and unique features for finding the potential problems and risks under virtual construction environment by BIM’s technology, so as to find problems in advance and evaluate them preliminarily, put forward corresponding countermeasures and prevent measures, work out optimized scheme to guide the real construction, and control effectively the project’s quality, progress and cost. BIM solves fundamentally the management defects from traditional project, and will certainly bring about a series of great changes in the circles of project management.

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