Ivana Tureková

Machinery Risk Analysis Application in the System of Employee Training

The area of security affects the entire life cycle of the machine from design, manufacturing, installation, adjustment, maintenance all the way to its disposal. Clearly, the longest as well as the most dangerous stage of the machine, is its own operation and maintenance. At this stage it is necessary to assess the risks associated with its use and possess the documentation so as to use the machine safely. These materials are the basic documentation, which is the subject of familiarization and practical training of the employees rather than immediate use of the machine. This article describes the risk analysis of the machinery and its application to risk management particularly the process of training and educating the employees.

The Environmental Impacts of Fire-Fighting Foams

The Environmental Impacts of Fire-Fighting Foams Extinguishing foams are commonly used for extinguishing the fire of flammable liquids, whereby their insulating, choking and quenching effects are exploited. The purpose of the paper is to consider and compare the foams currently used in fire departments, regarding mainly their high extinguishing effect (capability of faster aborted burning on the large surface at low foam consumption), but also their impact on the environment in each stage of their life cycle.

Lifelong learning in the professional practice

Education of employees is an ongoing process in which adaptation and changes in working behavior, level of knowledge, skills and employee motivation occur through the use of diferent strategies, styles and methods. The result is a reduction in the differences between the current competencies of employees and the requirements imposed on them by employers, respectively between the requirements of the labor market and their competitiveness. The process of learning in the professional practice involves identification of educational requirements, learning objectives, education planning, selection of appropriate educational institution, the very implementation of education, and evaluation of the educational effectiveness of staff and organization. On the basis of theoretical assumptions we have conducted a study aimed to analyze the lifelong learning on a representative sample of organizations in professional technical practice in Slovakia in relation to the recommendations of the European Union and the Government of Slovak Republic. The research was aimed to determine how, at what level, and by what means Slovak universities participate in lifelong learning in manufacturing organizations. In the research we focused on the relationship of production organizations and employees to further education and self-education in the phase of their career development and career promotion.

Minimum Ignition Temperature of Wood Dust Layers

Abstract Fire characteristic (properties) are used to determine the fire risk and explosion hazard of materials. They are defined as numerical values which describe behavior in the process of burning. They can be determinate by standardized test methods. In this paper is described the most important fire technical characteristic of dust layer (minimum ignition temperature) and the results of standard laboratory method determination for wood dusts, aswell.

Study of Thermal Degradation of Polymers

This article deals with measurements of selected waste polymers in the combustion process. The technology of controlled burning occupies an important position in the process of waste disposal. Therefore it is necessary to assess the behaviour of materials in the process of thermal degradation by fire characteristics. An experiment was conducted in accordance with standard STN ISO 871: 2010 Plastics. Determination of ignition temperature using a hot-air furnace. There were studied a mass loss rate of the samples in their degradation and also monitored some products of combustion.

The Dimensional Characteristics of the Particles of Wood Dust of Selected Deciduous Trees Considering to Explosion

The article is dealing with wood dust particle size problem in consideration of their fire and explosion. The aim of the thesis is statistical evaluation of wooden particles of Palisander (Jacaranda Mimosifolia) and Oak (Quercus robur L.). The samples were taken from the operation of the production furniture, in which dust is formed during the technology. Measurement was carried out by laser analyzer. Measurements were carried out on samples in specific time interval. Values, which were acquired, were evaluated of characteristics of the Weibull Distribution and treated in statistical program. It has been found by means of measurement and evaluation that sample of Palisander (Jacaranda Mimosifolia) has finer grain than sample of Oak (Quercus robur L.), therefore the has greater assumption to the creation of fire and explosions in process at the wood processing. We note in comparison with other sizes of wood particles, that the percentages are comparable.

Study of Effect of Flame Retardants on Initiation Process of Lignocellulose Materials at Heat Flux Acting

The present paper deals with the study of effects of heat flux on flammability of lignocellulose materials at application of flame retardants, which may restrict or retard the burning of mentioned materials. Significance of the impact of heat flux is important from the viewpoint of fire protection. The heat flux is namely one of the most critical factors causing ignition, the subsequent flame propagation, and last but not least it also affects the burning rate. The aim of this paper is to present the results achieved from experimental measurements of heat flux acting on the selected lignocellulose materials with and without application of flame retardants.

Study of Polymeric Materials Burning

The article deals with determination of spontaneous ignition temperature and flash ignition temperature of polymeric materials and monitoring of mass loss rate during their degradation. An experiment was conducted in accordance with standard STN ISO 871: 2010 Plastics. Determination of ignition temperature using a hot-air furnace.

Advanced Alert and Warning Systems

Modern autonomous systems (AUS) correspond to the current global technical standards and European principles of prevention of industrial accidents. Their construction requires a purposeful and systematic approach of investors. The paper presents an elaborated standard project of an autonomous system with ammonia as a kind of refrigerant for an ice rink. The implementation of the proposed project can make the process of warning and alerting the population in danger more effective.

Influence of Retardants to Burning Lignocellulosic Materials

Influence of Retardants to Burning Lignocellulosic Materials The paper deals with monitoring retardant changes of lignocellulosic materials. Combustion of lignocellulosic materials and fire-technical characteristics are described. In assessing the retarding effect of salt NH4H2PO4, fire-technical characteristics as limiting oxygen index (LOI) were measured, and by using thermoanalytical TG and DSC methods. High-temperature process of cellulose degradation at various flame concentrations was studied.