Analysis of safety inspections on pedestrian crossings from the road lighting point of viewMatea Šepoval
, 2020, master's thesis
Abstract: In this master's thesis we will analyse traffic safety at pedestrian crossings from the lighting point of view. The focus of the work will be on Croatia and Slovenia. Accidents at pedestrian crossings are the most common forms of accidents involving pedestrians, and although these countries are equal members of the European Union, their attitude towards road users may be different.
Road accidents are one of the main indicators of road safety in every country and, based on statistics, suggestions for improvement will be made. By analysing the type of pedestrian crossings and the types of street lighting, we will identify and show their weaknesses. We will first present an analysis of traffic accidents involving pedestrians for certain periods for Slovenia and Croatia. This analysis is an indicator of actual traffic conditions related to pedestrian safety and non-motorized traffic. The statistical data presented in this master’s thesis were obtained from the Ministry of the Interior of the Republic of Croatia and the website of the Public Agency of the Republic of Slovenia for Road Safety, which is available with a large amount of data and analyses of traffic safety on a daily basis. Slovenian regulations clearly show the types and methods of designing pedestrian crossings, while Croatia lags behind in the details and explanations of the elements. In the end, an example of a comparison of pedestrian crossing lighting in the Republic of Croatia and Slovenia at locations in Bjelovar and Maribor will be presented. I will compare the brightness of pedestrian crossings and give an analysis of current traffic safety. Finally, solutions to improve the situation will be offered.
Keywords: traffic safety, pedestrian road crossing, traffic accident, traffic lighting
Published: 01.10.2020; Views: 216; Downloads: 42
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Introduction of the concept of "Rescue Sheet" in road trafficVanna Boroša
, 2019, master's thesis
Abstract: In this master's thesis, an analysis was made of the way fire departments operate in rescuing injured passengers from vehicles in an event of a car accident. In order to make it easier to understand the core of master's thesis, the paper defines terms such as the "golden hour", which is essential for the survival of injured passengers in a car accident. The analysis also includes information on the construction designs of the car and how the construction of the car could make it difficult for the firefighting units to operate. Some examples of interventions done by fire brigades and the problems encountered in everyday work on modern cars are also provided. In the concluding part of the thesis we have presented how fire departments can become more efficient, safer, faster, and economical in their daily work while rescuing passengers from vehicles. We have explained in more detail the notion of a “rescue sheet” and how it can be better implemented in the future. At the end of the paper, we have suggested the optimal ways of rescue sheet usage and have outlined the advantages and disadvantages of these uses.
Keywords: Traffic accident, Firefighters, Traffic safety, Golden hour, Rescue sheet
Published: 23.09.2019; Views: 330; Downloads: 40
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Simulation of flow conditions in nuclear power plant reactor pressure vessel lower plenum experimental facilityBlaž Kamenik
, 2019, master's thesis
Abstract: The flow conditions during the experiment LIVE2D on reactor core melt behaviour in the lower plenum of a reactor pressure vessel, performed at the Karlsruhe Institute of Technology (Germany), were simulated with a Computational Fluid Dynamics computer code. In this hypothetical severe accident scenario in a pressurized water reactor nuclear power plant, the melt is divided into an oxidic layer and a metallic layer on top of it, and the oxidic layer is volumetrically heated due to decay heat. In the experiment, oil and salt were used as simulant materials for metallic and oxidic melt, respectively. The main goal of performed simulations was to investigate the so-called “focusing effect”, where a thin layer of the reactor vessel steel wall is exposed to high heat flux. Due to the length of experiment, which exceeds 100 hours, only intervals of the melt behaviour were simulated. Four cases were simulated. The first case investigated different boundary conditions for the oil layer behaviour for layer thickness 35 mm. The second case investigated the same conditions with added modelling of the reactor vessel steel wall and salt crust from the lower layer. The third case used similar modelling as the second case to investigate the oil layer behaviour for layer thickness 75 mm. The fourth case investigated both salt and oil layers for oil layer thickness 75 mm. Different analytical and numerical calculations were performed to determine heat losses from simulant liquids to the surroundings, which played an important part in the experiment.
Keywords: nuclear power plant, severe accident, reactor core melt, lower plenum, heat flux focusing effect
Published: 17.09.2019; Views: 478; Downloads: 81
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Analysis of road traffic safety in Minna Niger State, NigeriaAdebayo Owolabi Oyetubo
, Oluwaseyi Joseph Afolabi
, Muhammed Etudaiye Ohida
, 2018, original scientific article
Abstract: Road traffic accident is one of the major causes of death in Nigeria. Road accidents have taken away so many lives in Nigeria today that hardly does any single disease match its mortality prowess. People have died prematurely and properties worth several millions of Naira have been lost as a result of road traffic accident. This paper gives a full discussion on road traffic safety issues and the methodology used were through the collection of data using questionnaire and accident information from the Nigeria Police Force, FRSC etc. The primary information for this research was sourced through the use of structured questionnaire, personal observation and interviews of road users in the study area. Secondary data emanated from published and unpublished sources such as government records, internet, journals, books etc. The findings were presented in descriptive and inferential form using frequencies, percentages, tables, mean and chi-square analytical techniques. The findings from the study revealed among many others; that Male involved more in road accident compare to female counterpart in Minna Niger State. Private car had more accident compare to Taxi, The number of accident in each zone does not depend on the population of that zone, etc.
Keywords: accident, traffic, fatalities, safety, vehicle
Published: 25.04.2018; Views: 476; Downloads: 247
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Methodology of an aircraft accident response system assessmentFranc Željko Županič
, Maja Meško
, Iztok Podbregar
, 2012, original scientific article
Abstract: The paper investigates the ability to learn from an aircraft accident as the opportunities for learning diminish with the decline in the accident rate. A safety compromising case is studied as the processes of aircraft accident intervention and recovery can degrade the ability of an aircraft accident investigation process to enhance aviation safety by revealing accident causation. In the case study an assessment of the Slovenian aircraft accident response system was made. For the purpose of evaluating the successfulness of aircraft accident intervention and effectiveness of recovery, a model of aircraft accident response system requirements has been developed. Based on non-conformances identified by the model of requirements, remedial measures are proposed for the enhancement of the aircraft accident response system operation. Criteria for the definition of the transition from accident intervention to recovery are derived from the assessment findings in a manner not to impede the aircraft accident investigation effectiveness and efficiency.
Keywords: aircraft accident, response system, intervention, recovery, investigation, crisis management
Published: 02.06.2017; Views: 1205; Downloads: 386
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Identification of drivers in traffic accidents and determination of passenger position in a vehicle by finger marksMatej Trapečar
, Martin Lipičnik
, Jože Balažic
, 2012, review article
Abstract: The following paper aims to illustrate certain investigative activities in the forensic analysis and examination of the scene of traffic accidents. When a traffic accident occurs, the scene must be secured as soon as possible to enable professional and proper forensic investigation. Failure to secure the accident scene might result in losing or contaminating the traces, which makes it more difficult to prove or explain trace evidence in further procedure or even makes such evidence inadmissible. The topic is discussed from the viewpoint of crime scene examination, since analysing and investigating traffic accidents requires a great deal of expertise and attention of the investigators. Complex traffic accidents include feigned accidents, hit-and-run accidents as well as accidents in which the driver and passengers, dead or alive, need to be identified. In identifying the passengers, standard criminal investigation methods as well as police forensic and forensic medicine methods are followed. Such methods include confirming the identities with identity documents, other documents and vehicle ownership, fingerprints, biological traces, fibre traces, contact traces, traces of physical injuries on the driver and passengers, etc. According to the results obtained in fingerprint detection on human skin surfaces, this method can also be applied in confirming physical contact between the driver and the passengers in the accident, e.g. in the event of moving the victims and changing the scene of the accident.
Keywords: traffic accidents, accident analysis, driver's identity, passengers' position, finger marks, human skin
Published: 02.06.2017; Views: 777; Downloads: 272
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Experimental models of medium break loss of coolant accidents with and without steam generator tube ruptureJure Marn
, Marjan Delić
, Leopold Škerget
, 2003, original scientific article
Abstract: This paper reports model experiments simulating medium break loss of coolant accidents, with and without steam generator tube rupture (SGTR), in pressurized water reactors. Apart from a significant influence on the pressure in the reactor coolant system in the early parts of the accident, SGTR generally has only a small effect on the pressures and temperatures during the accident. The initial reactor conditions are found to be more significant. Some results of preliminary numerical models are briefly presented and these are broadly in agreement with the experimental measurements.
Keywords: nuclear engineering, nuclear accidents, steam generator tube rupture, loss of coolant, medium break loss of coolant accident, computer program, Melcor, MELCOR computer code, integral test facility
Published: 01.06.2012; Views: 1186; Downloads: 89
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