Tomáš Gergeľ

Tomáš Gergeľ
National Forest Centre · Forest Research Institute

Ing. PhD.

About

29
Publications
15,436
Reads
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142
Citations
Additional affiliations
September 2017 - March 2020
National Forest Centre - Forest Research Institute
Position
  • Researcher
September 2014 - August 2017
Technical University in Zvolen
Position
  • PhD Student
Education
September 2014 - August 2017
Technical University in Zvolen
Field of study
  • Construction and Technology of Wooden Products
September 2012 - August 2014
Technical University in Zvolen
Field of study
  • Environmental Engineering
September 2009 - August 2012
Technical University in Zvolen
Field of study
  • Environmental Engineering

Publications

Publications (29)
Article
Full-text available
This article presents a proposal of thermal modification of Norway spruce and sycamore maple for special wood products, mainly for musical instruments. Selected physical and acoustical characteristics (PACHs), including the density (ρ), dynamic modulus of elasticity along the wood grain (EL), specific modulus (Esp), speed of sound along the wood gr...
Article
Full-text available
The first goal of this paper is to verify the accuracy of four calculation methods of log volume. The tool to achieve this goal is to compare the results of the calculation of the log volume with the real log volume obtained from the three-dimensional reconstruction obtained by computed tomography. The second goal of this paper is to determine the...
Article
Full-text available
Valuation of timber growing in commercial forests is a key issue for forest owners, forest enterprises, but also a starting point for long-term planning in the field of forest management. The subjective approach of the evaluator can, to a large extent, lead to inconsistencies in the area of wood qualitative evaluation. This paper aimed to perform a...
Article
Full-text available
This article presents the results of an investigation of acoustic and thermophysical properties of insulation panels made from recycled technical textiles originating from the automotive industry. Measurements were performed on the samples of insulation panels (Senizol AT XX2 TL60), which were modified with liquid flame retardants (ISONEM® ANTI-FIR...
Article
Full-text available
The potential of tree bark, a by-product of the woodworking industry, has been studied for more than seven decades. Bark, as a sustainable raw material, can replace wood or other resources in numerous applications in construction. In this study, the acoustic properties of bark-based panels were analyzed. The roles of the particle size (4–11 mm and...
Article
Full-text available
Rail transport is the second most important way of transporting people and freights by land in the European Union. Rail noise affects around 12 million people in the European Union during the day and around 9 million at night. There are two possible ways to assess environmental noise: noise measurement in situ and prediction using mathematical mode...
Article
Full-text available
The results of the investigation of the room acoustic properties influence on the perception of the sound of percussion musical instruments are presented in the paper. At first, the acoustic properties of two rooms were determined without musical instrument. Subsequently, the acoustic properties of the rooms were determined during the presentation...
Article
Full-text available
For the sustainability of an important renewable resource, such as wood, it is important to significantly increase the efficiency of its processing. A large part of this raw material ends up in the wood processing industry, where it is used for the production of pulp, paper, construction and furniture timber, floors and others. Therefore, it is ver...
Article
Full-text available
The paper deals with comparing the measurement of noise from the railroads in the residential zone of the town of Zvolen with the results calculated using the prediction methods “Schall 03“ (Deutsche Bundesbahn, 1990) and “Methodical instructions for the calculation of sound pressure level from transport” (MPVHD). The first is used in the Slovakia...
Article
Full-text available
This article deals with the testing of a methodology for creating log cutting patterns. Under this methodology, programs were developed to optimize the log yield. Testing was conducted by comparing the values of the proportions of the individual products resulting from an implementation of the proposed cutting pattern of a specific log with the cal...
Article
Full-text available
The quality of milled surface medium-density fibreboards (MDF) and the effect of the wrong milling direction during the process of automatic milling in real conditions in practice (production machine, production tool, and material) are presented in the paper. Moreover, the effect of the double vs. single bladed milling cutter on the final surface q...
Article
Full-text available
Volatile organic compounds (VOCs) were evaluated with application of a thermal load of thermal insulation boards made of expanded polystyrene (EPS). Samples of commercially produced polystyrene EPS 100S and EPS GreyWall were tested at 60 °C. For qualitative and quantitative analyses, headspace gas chromatography mass spectrometry (HS-GC-MS) was use...
Article
Full-text available
The wood materials bonded with the mineral binders are widely used in building industry. In this study is the attention focused on the acoustic and the thermophysical characteristics of the two thermal insulation materials based on the wood wool. Wood-wool cement board Krupinit K and wood-wool and polystyrene thermal insulation board Kombidoska KD-...
Article
Full-text available
The sound absorption coefficient is a commonly used parameter to characterize the acoustic properties of materials. The fire performance of construction products has to be evaluated on the basis of their reaction to fire performance. The evaluation of the reaction to fire performance for the flammable construction materials which are in Class E rea...
Article
Full-text available
Wood assessment optimization should be the top priority of the forestry subjects that are fundamentally dependent on the income from its sale. The aim of this paper is to analyse the beech, oak and ash tree logs that were categorized into quality classes according to the size of one of the qualitative characters related to the surface area (false h...
Article
Full-text available
Effects of biological modification of Norway spruce wood with the wood-staining fungus Sydowia polyspora were evaluated relative to select physical and acoustical characteristics (PACHs), including the density (ρ), dynamic modulus of elasticity along the wood grain (EL), specific modulus (Esp), speed of sound along the wood grain (cL), resonant fre...
Article
Full-text available
Heterogeneity in the tree trunks' shapes and quality is not often reached fully using raw material potential in grading processes of tree and stand and the following sawmill processing. Therefore, optimization of given processes is a current topic of research and is part of the operational practice. In the contribution we submit a survey of solving...
Article
Full-text available
The issue of the change in tool temperature as a result of the machining process is presented in this paper. The aim of the paper is to put forward a proposal and subsequently to verify the methodology of temperature monitoring in the process of computer numerical control (CNC) machining in real time. Subsequently, the data can be used in the proce...
Article
Full-text available
The Use of renewable resources on the basis of forest biomass is gradually becoming an international issue. The conditions for the optimal use include solving several technical, technological, economic and environmental problems. The contribution is aimed at solving a role model of optimization of forest biomass transport in the conditions of the S...
Article
Full-text available
The sound absorption of the expanded polystyrene (EPS), EPS enhanced with graphite (EPS Grey), mineral wool and material made from the technical textile materials was measured. The measurement was carried out the transfer function method by means Kundt´s tube Bruel & Kjaer 4206. The sound absorption of mineral wool and material from technical texti...
Article
In 2015 the Biomimicry Institute released a call 'Biomimicry Global Challenge Design 2015'. The Biomimicry Institute is partnering with the Ray C. Anderson Foundation and food and conservation experts to solicit nature inspired solutions for food systems improvement. We decided to create a feasible concept applicable for next decades with the use o...
Article
Full-text available
The article presents the design of a wooden model of a standardized tapping machine. The design of the tapping machine came out from the requirements given in the standards for the measurement of airborne and impact sound insulations. The design was divided into several phases: designing of structure and device schema, modeling the 3D model, dimens...
Article
Full-text available
The article presents the hypothesis of the existence of a relationship among the feed rate, the vibrations and the quality of workpiece surface expressed as the arithmetic average deviation of the roughness profile Ra. The measurements of the workpiece vibration were made at the medium-density fibreboard (MDF) milling using CNC machining center at...
Poster
Full-text available
In the frame of cooperation with the University of Žilina we focused on conceptual thinking in physical education. We create such educational materials whose implementation in teaching physics oriented subjects will increase the level of understanding and application of physical laws and principles at higher levels of cognitive goals (in the sense...
Article
Full-text available
The paper deals with wooden buildings made from CLT panels and the acoustic comfort in these buildings. Furthermore, it discusses the evaluation of airborne and impact sound insulation in wooden buildings made from CLT panels. The results are compared with the required minimum for different types of noise and protected areas.
Article
Full-text available
Railway noise in towns and city centres is one of the environmental problems. Defining the noise level is possible in two ways - via in situ measurement or via calculation (prediction). For the comparison of objectively measured values of sound pressure levels from railroads two methods used in the Slovak Republic were chosen - Schall 03 and the Cz...
Article
Full-text available
Road traffic is one of the most often used means of transportation of people and goods today. Consumerism causes a constant increase in the demand for goods and services. Our paper presents a proposal for traffic monitoring. Its aim was to design a method for measuring traffic density using acoustical methods. It describes the results of measuring...
Article
Full-text available
This work deals of physico-acoustical characteristics (density, dynamical modulus of elasticity, acoustical constant, speed of sound propagation in wood and logarithmic dumping decrement) of economically significant fruit wood species Sweet cherry (Cerasus avium L. Moench), Cherry (Prunus cerasus, L.), European pear (Pyrus communis L.), European cr...

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Projects

Projects (7)
Project
Raw wood is one of the most important forestry products. Assumptions about a gradual decline in the use of wood from the last century have not been fulfilled, but on the contrary, the position of raw wood and wood products is constantly strengthening. In 1900, about 1,800 methods of various uses of wood for final products or raw materials for other processing industries were known. In 1920, 2,200 methods of using raw wood were mentioned, in 1950 about 5,000 and in 1970, up to 18,000 methods of using raw wood and wood products were recorded. The possibilities of wood recovery and utilization continue to expand. With the development of the possibilities of utilization and processing of wood, the position of the forestry and wood processing complex is strengthening. New possibilities for qualitative evaluation of wood and wood products have experienced dynamic development in the last decade, along with the development of information technologies. The aim and focus of the special issue is to bring new knowledge from these areas. It focuses mainly on the qualitative evaluation of wood and wood products, research of new wood products with significant potential for the forestry and wood processing complex, and research of quality properties of raw or specially treated wood and wood products.
Project
The aim of this project is to bring new technical solution for reduction of emissions evolving from polystyrene. (a. g. under heating by sun on wall of house, or if it is used under flor heating system), by effective sorption on sorbent media, which is added in the contact system. This effect can increase quality of environment and air inside buildings.
Project
Research and development to promote forestry competitiveness