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accident-prevention
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Total 25 records
Measuring sustainable transportation for the world countries: The application of concordance analysis
, Article Proceedings of the Eighth International Conference on Applications of Advanced Technologies in Transportaion Engineering, Beijing, 26 May 2004 through 28 May 2004 ; 2004 , Pages 334-339 ; Vaziri, M ; Sharif University of Technology
ASCE - American Society of Civil Engineers
2004
Abstract
In this paper, sustainability with respect to transportation sector of the selected countries has been evaluated. Seventy nine countries were initially selected for detailed analysis for the period of 1980-1995. The key dimensions of sustainable development i.e. social, environmental, and economic characteristics are used. Firstly, a set of sustainable transportation indicators has been introduced. Then composite indices of three non-transport groups with respect to four transport modes are calculated. The composite indices are aggregated by the concordance analysis technique to achieve comprehensive transport sustainability indices of countries, and according to these values, the countries...
Analysis of high risk occupational accidents in construction industry using data-mining methods
, Article Iran Occupational Health ; Vol. 11, Issue 4 , 2014 , pp. 31-43 ; Ardeshir, A ; Aghaie, S. E ; Sharif University of Technology
Abstract
Background and aims: Among different types of occupational accidents in the construction industry, falls and falling objects accidents (group I) account for 44% of construction accidents. Hit by vehicle, electric shock, collapse in the excavation and fire or explosion accidents (group II), while are only 7% frequent, make up about 26% of all fatalities and total disabling accidents. The aim of this study is to investigate these two groups of accidents and to discuss the obtained results in order to identify the potential hazards of construction industry. Methods: Data mining methods are employed to analyze data in this research. Hence, 21864 data records which were provided by Social...
Studying the Simultaneous Impact of Autonomous Vehicles and Distracted Driving on Safety at Unsignalized Intersections
, M.Sc. Thesis Sharif University of Technology ; Nassiri, Habibollah (Supervisor)
Abstract
Human error is one of the most important causes of accidents. Distraction and lack of attention to driving, fatigue, poor vision, speeding, and other such errors by drivers can cause accidents. With the rapid advancement of technology, transportation planners also thought of making cars as smart as possible to reduce human error. In this study, the effect of self-driving cars on the number of accidents at two unsignalized intersections is investigated using traffic microsimulation. For conventional vehicles, the factor considered for the simulation and calibration is driver distraction, which may be caused by reading or writing a text message on a cellphone or other items. This factor can be...
Mode choice and travel distance joint models in school trips
, Article Transportation ; 2017 , Pages 1-27 ; 00494488 (ISSN) ; Samimi, A ; Sharif University of Technology
Springer New York LLC
2017
Abstract
We test a copula-based joint discrete–continuous model to unravel mode choice and travel distance decisions in a joint framework for school trips. This framework explicitly accounts for common unobserved factors that may affect both the mode choice and travel distance. Joint estimation of the models makes a significant difference in the effect of travel distance on willingness to walk to school. The absolute value of the travel distance coefficient in the mode choice model increases by 22% when a joint formulation is adopted instead of the conventional single estimations. We find a significant decrease of 19% in the coefficient of travel safety perception in the joint mode choice model...
Developing an Ensemble Learning Framework Using Machine Learning Methods and its Application in Preventing Road Accidents
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mohmoud (Supervisor)
Abstract
Road accidents are currently one the main existing problems and a big challenge in Iran that is putting the lives of Iranian citizens in danger. Each accident is the result of a complex interplay between road users, vehicles, roads and environment. One of the main goals of accident data analysis is to identify and determine the main factors of a road accident. The dataset used here was obtained from the road traffic police and is stored in 3 different databases and corresponds to the accidents that happened between years 1390 and 1395 according to the Shamsi calendar. In this thesis, in order to deal with the inherent complexity and heterogeneity of the accident data, we will first introduce...
The quantitative risk assessment of a hydrogen generation unit
, Article International Journal of Hydrogen Energy ; Volume 37, Issue 24 , December , 2012 , Pages 19241-19249 ; 03603199 (ISSN) ; Zarei, E ; Badri, N ; Sharif University of Technology
2012
Abstract
The safety of hydrogen generation process is a major concern. This paper discusses the quantitative analyzes of the risk imposed on neighborhood from the operation of a hydrogen generator using natural gas reforming process. For this purpose, after hazard identification, the frequency of scenarios was estimated using generic data. Quantitative risk assessment was applied for consequence modeling and risk estimation. The results revealed that, jet fire caused by a full bore rupture in Desulphurization reactor has the highest fatality (26person) and affects the largest area of 5102 m2. The lethality radius, maximum radiation and safe distance of this incident were 140 m, 370 kW/m2 and 225 m...
A simulation environment for path and image generation in an aerial single-camera vision system
, Article Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering ; Volume 225, Issue 5 , 2011 , Pages 541-558 ; 09544100 (ISSN) ; Malaek, S. M. B ; Sharif University of Technology
2011
Abstract
This work describes the essential tools and architecture of a simulation environment, which could help enhance general aviation training as well as safety issues, especially while dealing with flights over unfamiliar environments. It also describes how the authors could effectively generate any desired flight path and its associated surrounding images through implementing a virtual single camera with simultaneous localization and mapping (monocular simultaneous localization and mapping) techniques. The overall package enjoys an aerial three-dimensional (3D)/graphical engine integrated with a full six-degrees-of-freedom aircraft dynamics, which serves as its trajectory generator, together...
Quantitative risk assessment to site CNG refuelling stations
, Article Chemical Engineering Transactions ; Volume 19 , 2010 , Pages 255-260 ; 19749791 (ISSN) ; 9788895608112 (ISBN) ; Nourai, F ; Rashtchian, D ; Sharif University of Technology
Italian Association of Chemical Engineering - AIDIC
2010
Abstract
This study considers the application of quantitative risk assessment (QRA) on the siting of compressed natural gas (CNG) stations and determining nearby land use limitations. In such cases the most important consideration is to be assured that the proposed site would not be incompatible with existing land uses in the vicinity. It is possible by the categorization of the estimated levels of individual risk (IR) which the proposed site would impose upon them. An analysis of the consequences and likelihood of credible accident scenarios coupled with acceptable risk criteria is then undertaken. This enables the IR aspects of the proposed site to be considered at an early stage to allow prompt...
A comparative appraisal of roadway accident for Asia-Pacific countries
, Article International Journal of Engineering, Transactions A: Basics ; Volume 23, Issue 2 , 2010 , Pages 111-126 ; 17281431 (ISSN) ; Sharif University of Technology
Materials and Energy Research Center
2010
Abstract
This paper describes an attempt to shed some light on road safety in Asia Pacific region by characterizing and assessing its road accidents. The relevant national road accident data were extracted from centralized data sources of international agencies. Due to data incompleteness and missing values, 21 Asia Pacific countries, presenting more than half of the world's population, were selected for detailed analysis. The study database consisted of 7 variables, covering years 1980 and 1995. The univariate and multivariate statistical analyses for the selected countries showed interesting results and relations for the selected variables. Accident rates, reflecting road accident risk and...
Inherently safe and economically optimal design using multi-objective optimization: The case of a refrigeration cycle
, Article Process Safety and Environmental Protection ; Volume 104 , 2016 , Pages 254-267 ; 09575820 (ISSN) ; Shahhosseini, H. R ; Javidi, M ; Sharifzadeh, M ; Rashtchian, D ; Sharif University of Technology
Institution of Chemical Engineers
2016
Abstract
The economic viability of industrial processes strongly depends on their safe and reliable operation. The method of inherent safe process design enables systematic consideration of safety measures in order to ensure process safe operation at the early stages of process design. The challenge is that the economic measures that are often considered for the design of industrial processes are often incommensurable with the safety measures. In the present research, a novel framework is proposed in which the safety criteria are quantified based on consequence modeling and aggregated with the economic performance using multi-objective optimization programming. The developed methodology was applied...
Seismic performance evaluation of a jointed arch dam
, Article Structure and Infrastructure Engineering ; Volume 12, Issue 2 , 2016 , Pages 256-274 ; 15732479 (ISSN) ; Ghaemian, M ; Sharif University of Technology
Taylor and Francis Ltd
2016
Abstract
Seismic performance and safety of a jointed arch dam, as an arch-shaped mass concrete structure, are investigated through the nonlinear incremental dynamic analysis. In this way, 12 proper ground motions are selected, each of them is scaled to 12 successively increasing intensity levels and applied to the dam. Three and seven contraction joints are inserted within the dam body, and stage construction is taken into account. Several main assumptions including dam–reservoir–foundation dynamic interaction, absorbing boundary conditions at the far-ends of the reservoir and foundation, and material and joint nonlinearities are considered. The failure modes of the dam are determined according to...
Presenting a model based on fuzzy application to optimize the time of IBS projects in gas refineries
, Article MATEC Web of ConferencesVolume 95, 9 February 2017 ; Volume 95 , 2017 ; 2261236X (ISSN) ; Majrouhi Sardroud, J ; Mofid, M ; Sharif University of Technology
EDP Sciences
2017
Abstract
Nowadays, the construction industry has started to embrace IBS as a method of attaining better construction quality and productivity and reducing risks related to occupational safety and health. The built of pre-fabricated component in factories reduces many problems related to lack of purposing uncertainty in scheduling calculation and time management of projects. In the case of using IBS method for managing time in projects, former studies such as Allan Tay's research, indicates that this method can save up at least 29% of overall completion period versus the conventional method. But beside mentioned advantages of this technical method, the projects could be optimized more and more in...
Assessing public acceptance of connected vehicle systems in a new scheme of usage-based insurance
, Article Transportation Research Record ; Volume 2625 , 2017 , Pages 62-69 ; 03611981 (ISSN); 9780309441551 (ISBN) ; Nassiri, H ; Sharif University of Technology
National Research Council
2017
Abstract
The consequences of road accidents are significant for drivers and society. The connected vehicle system (CVS) is a promising technology that can improve road safety by warning drivers of traffic hazards. Broad implementation of the CVS could mitigate the harmful consequences of road accidents. Widespread implementation requires schemes that can promote the pervasive adoption of the system by drivers. This study proposes the innovative idea of implementing the CVS in usage-based insurance (UBI) as a measurement probe and modeling drivers' acceptance of the new UBI scheme. This study developed a random effect logit model demonstrating that the drivers of cheaper vehicles and middle-age...
Modeling truck accident severity on two-lane rural highways
, Article Scientia Iranica ; Volume 13, Issue 2 , 2006 , Pages 193-200 ; 10263098 (ISSN) ; Edrissi, A ; Sharif University of Technology
Sharif University of Technology
2006
Abstract
Truck accidents are an issue of concern due to their severity. Logit modeling and Neural Network modeling are performed to investigate factors such as vehicle, roadway, environment and driver characteristics that can potentially contribute to the severity of truck accidents. The objective of this study is to present models that can predict the severity of truck accidents and to identify the important factors causing these accidents. Comparison between neural networks and logit modeling are made using vehicle crash data on two-lane rural highways in Iran. A variety of variables related to roadways, vehicles, environment and drivers, such as, driver fatigue, head-on collision and lack of...
Heavy mobile crane lift path planning in congested modular industrial plants using a robotics approach
, Article Automation in Construction ; Volume 122 , 2021 ; 09265805 (ISSN) ; Taghaddos, H ; Mousaei, A ; Behzadipour, S ; Hermann, U ; Sharif University of Technology
Elsevier B.V
2021
Abstract
Lift path planning is a significant subtask in constructability analysis, sequencing, and scheduling of congested industrial modular projects, impacting project cost, and safety. Although intuitive lift planning is still prevalent among the practitioners, this manual process might be tedious and error-prone for hundreds of lifts. This research presents an automated lift path planning method for heavy crawler cranes in no-walk scenarios employing a robotics approach. This method treats the lifted object as a three-degree-of-freedom convex mobile robot with discretized rotational and continuous translational motions. The proposed resolution-complete method models the crane capacity chart,...
REALISM: Reliability-aware energy management in multi-level mixed-criticality systems with service level degradation
, Article Journal of Systems Architecture ; Volume 117 , 2021 ; 13837621 (ISSN) ; Safari, S ; Saber Latibari, J ; Hessabi, S ; Sharif University of Technology
Elsevier B.V
2021
Abstract
Mixed-criticality embedded systems, as the next-generation of safety-critical systems, are increasingly employed in the industry due to consolidating functionalities with varying criticality levels onto the same computing platform. Technology scaling, battery-supplied design, and heavy computation in mixed-criticality systems necessitate employing energy management techniques. Due to the degrading effects of these techniques on the system's reliability, minimizing energy consumption and meeting tasks’ timing constraints without sacrificing the reliability requirement is a vital challenge in designing mixed-criticality systems. In this paper, we propose REALISM; a novel Reliability- and...
Validation of the driver's angry thoughts questionnaire (DATQ) in a sample of professional drivers in iran
, Article IATSS Research ; Volume 46, Issue 3 , 2022 , Pages 370-379 ; 03861112 (ISSN) ; Nassiri, H ; Sullman, M. J. M ; Sharif University of Technology
Elsevier B.V
2022
Abstract
Aggressive driving has emerged as one of the most studied behaviors in the traffic safety field, due to its association with the odds of motor vehicle crashes and especially fatal crashes. Previous research has investigated the situations which provoke anger while driving, as well as the emotional (anger) and behavioral (aggression) aspects of aggressive driving. However, surprisingly the cognitive aspects of aggressive driving have largely been neglected. This study investigated the psychometric properties of the short-forms of the Driver's Angry Thoughts Questionnaire (DATQ) and the Driving Anger Expression Inventory (DAX) in a sample of professional drivers. Furthermore, the study aimed...
Modeling the accuracy of traffic crash prediction models
, Article IATSS Research ; Volume 46, Issue 3 , 2022 , Pages 345-352 ; 03861112 (ISSN) ; Keshavarz, S ; Pazari, P ; Safahieh, N ; Samimi, A ; Sharif University of Technology
Elsevier B.V
2022
Abstract
Crash forecasting enables safety planners to take appropriate actions before casualty or loss occurs. Identifying and analyzing the attributes influencing forecasting accuracy is of great importance in road crash forecasting. This study aims to model the forecasting accuracy of 31 provinces using their macroeconomic variables and road traffic indicators. Iran's road crashes throughout 2011–2018 are calibrated and cross-validated using the Holt-Winters (HW) forecasting method. The sensitivity of crash forecast reliability is studied by a regression model. The results suggested that the root mean square error (RMSE) of crash prediction increased among the provinces with higher and more variant...
Inherently safer process route ranking index (ISPRRI) for sustainable process design
, Article Journal of Loss Prevention in the Process Industries ; Volume 80 , 2022 ; 09504230 (ISSN) ; Shariff, A. M ; Buang, A ; Umer, A ; Zaini, D ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
The growth of process industries has escalated the probability of loss containment scenarios of hazardous materials that can be tackled via process safety schemes. For preliminary design stage, the inherent scheme is more promising to generate sustainable process designs. For this purpose, various process routes are typically compared to recognize the safer one via numerous indexing methods to eliminate routes with hazardous materials. However, these indices lack in accommodating the equipment characteristics and the underutilization of process and chemical characteristics. Specifically for chemical characteristics, the toxicity aspect has not been engaged for process route selection in...
Lifetime oriented multi-objective cost optimization of structural maintenance considering the safety of the system
, Article Proceedings, Annual Conference - Canadian Society for Civil Engineering, 28 May 2014 through 31 May 2014 ; Volume 1 , May , 2015 , Pages 656-663 ; 9781510818781 (ISBN) ; Nasserl, M ; Tavakolan, M ; Sharif University of Technology
Canadian Society for Civil Engineering
2015
Abstract
Nowadays the maintenance of the deteriorating structures is an important subject in industry and research. Due to the limitations of the budget and time, the optimization algorithms have been used widely to determine the best maintenance strategies to provide the more economical structures. On the other side, the Less life-cycle cost will result in less safe structures. As safety is a vital criterion for the users of a structural system, there is a severe need to make a suitable trade-off between cost and safety. So, the optimal maintenance strategies are those that fulfill both the safety and the economical requirements. In this paper, the reliability of the structural system is selected to...