<abstract xmlns="http://www.w3.org/1999/xhtml"> This study investigates the impact of energy renovation on the indoor air quality of an apartment building during the heating season. The study was performed in one residential building before and after its renovation. An evaluation of the indoor air quality was performed using objective measurements and a subjective survey. The concentration of CO2 was measured in the bedrooms, and a sampling of the total volatile compounds (TVOC) was performed in the living rooms of the selected apartments. Higher concentrations of CO2 and TVOC were observed in the residential building after its renovation. The concentrations of CO2, and TVOC in some of the cases exceeded the recommended maximum limits, especially after implementing energy-saving measures on the building. The average air exchange rate was visibly higher before the renovation of the building. The current study indicates that large-scale renovations may reduce the quality of an indoor environment in many apartments, especially in the winter season.</abstract>

Indoor Air Quality of Residential Building Before and After Renovation

<abstract xmlns="http://www.w3.org/1999/xhtml"> The results of Remote Piloted Aircraft System (RPAS) photogrammetry are digital surface models and orthophotos. The main problem of the digital surface models obtained is that buildings are not perpendicular and the shape of roofs is deformed. The task of this paper is to obtain a more accurate digital surface model using building reconstructions. The paper discusses the problem of obtaining and approximating building footprints, reconstructing the final spatial vector digital building model, and modifying the buildings on the digital surface model.</abstract>

The Creation of Space Vector Models of Buildings From RPAS Photogrammetry Data

<abstract xmlns="http://www.w3.org/1999/xhtml"> Conducting construction activities in occupied environments presents a great challenge due to the additional logistical requirements and the presence of the building occupants. The aim of this research is to gather and evaluate the means and methods to successfully plan, manage, and execute construction activities in occupied spaces in an effort to provide consolidated industry tools and strategies for maintaining a schedule and minimizing the impact on the occupants. The methodology of the research utilizes an exploratory approach to gather qualitative data. The data was collected through interviews with industry professionals to identify industry best practices. The semi-structured interviews provided a platform for the documents, lessons learned, and the techniques and strategies used for occupied construction by the construction industry. The information obtained in the interview process identified six themes that are critical to achieving and maintaining quality in occupied construction. These themes of the schedule, cost, customer satisfaction, planning, fire/life safety and utilities, and contractor management are reviewed in detail, and the paper discusses how to manage each element. The analysis and extracted management techniques, procedures and strategies can be used by the construction industry for future projects by focusing on the critical aspects of occupied construction and the manner in which to succeed with it.</abstract>

Construction in Occupied Spaces

<abstract xmlns="http://www.w3.org/1999/xhtml"> In this paper, the performance of a semi-active base isolation system, including a magneto-rheological (MR) damper and base isolation system for different combinations of response-related weighting matrices, has been studied. To consider all possible sets of response-related matrices, seven H2/linear quadratic Gaussian (LQG) control designs have been considered. For a numerical simulation, a six-story shear frame has been subjected to different earthquakes, and the performance of the control system has been evaluated. The results show that the optimal force-related weighting parameter is identical for different sets of response-related weighting matrices and is also independent of earthquake records when minimizing the maximum base drift is considered as the design objective. Also, the results of different sets of response-related weighting matrices show that the optimal sets for the design objective of minimizing the maximum base drift are the velocity and displacement/velocity-related weighting matrices.</abstract>

Optimal Response-Related Weighting Matrices to Control Semi-Active Base Isolation Systems

<abstract xmlns="http://www.w3.org/1999/xhtml"> The aim of the study is to evaluate the potential of enhancing thermal comfort and energy consumption created by three different radiant systems in the newly-built Energetikum office building. A representative office, Simulation room 1/1, was selected from 6 areas equipped with portable sensor groups for the indoor environment monitoring. The presented data obtained from 3 reference weeks; the heating, transition and cooling periods indicate overheating, particularly during the heating and transition period. The values of the indoor air temperature during the heating and transition period could not meet the normative criteria according to standard EN 15251:2007 (cat. II.) for 15-30% of the time intervals evaluated. Consequently, a simulation model of the selected office was created and points to the possibilities of improving the control system, which can lead to an elimination of the problem with overheating. Three different radiant systems - floor heating/ cooling, a thermally active ceiling, and a near-surface thermally active ceiling were implemented in the model. A comparison of their effects on thermal comfort and energy consumption is presented in the paper.</abstract>

Thermal Comfort and Energy Consumption Using Different Radiant Heating/Cooling Systems in a Modern Office Building

<abstract xmlns="http://www.w3.org/1999/xhtml"> It is widely acknowledged that in the hydrological and meteorological communities, there is a continuing need to improve the quality of quantitative rainfall and river flow forecasts. A hybrid (combined deterministic-stochastic) modelling approach is proposed here that combines the advantages offered by modelling the system dynamics with a deterministic model and a deterministic forecasting error series with a data-driven model in parallel. Since the processes to be modelled are generally nonlinear and the model error series may exhibit nonstationarity and heteroscedasticity, GARCH-type nonlinear time series models are considered here. The fitting, forecasting and simulation performance of such models have to be explored on a case-by-case basis. The goal of this paper is to test and develop an appropriate methodology for model fitting and forecasting applicable for daily river discharge forecast error data from the GARCH family of time series models. We concentrated on verifying whether the use of a GARCH-type model is suitable for modelling and forecasting a hydrological model error time series on the Hron and Morava Rivers in Slovakia. For this purpose we verified the presence of heteroscedasticity in the simulation error series of the KLN multilinear flow routing model; then we fitted the GARCH-type models to the data and compared their fit with that of an ARMA - type model. We produced one-stepahead forecasts from the fitted models and again provided comparisons of the model’s performance.</abstract>

Hybrid Forecasting of Daily River Discharges Considering Autoregressive Heteroscedasticity

AHEAD OF PRINT

Volume 32 (2024): Issue 1 (March 2024)

Volume 31 (2023): Issue 4 (December 2023)

Volume 31 (2023): Issue 3 (September 2023)

Volume 31 (2023): Issue 2 (June 2023)

Volume 31 (2023): Issue 1 (March 2023)

Volume 30 (2022): Issue 4 (December 2022)

Volume 30 (2022): Issue 3 (September 2022)

Volume 30 (2022): Issue 2 (June 2022)

Volume 30 (2022): Issue 1 (March 2022)

Volume 29 (2021): Issue 4 (December 2021)

Volume 29 (2021): Issue 3 (September 2021)

Volume 29 (2021): Issue 2 (June 2021)

Volume 29 (2021): Issue 1 (March 2021)

Volume 28 (2020): Issue 4 (December 2020)

Volume 28 (2020): Issue 3 (September 2020)

Volume 28 (2020): Issue 2 (June 2020)

Volume 28 (2020): Issue 1 (March 2020)

Volume 27 (2019): Issue 4 (December 2019)

Volume 27 (2019): Issue 3 (September 2019)

Volume 27 (2019): Issue 2 (June 2019)

Volume 27 (2019): Issue 1 (March 2019)

Volume 26 (2018): Issue 4 (December 2018)

Volume 26 (2018): Issue 3 (September 2018)

Volume 26 (2018): Issue 2 (June 2018)

Volume 26 (2018): Issue 1 (March 2018)

Volume 25 (2017): Issue 4 (December 2017)

Volume 25 (2017): Issue 3 (September 2017)

Volume 25 (2017): Issue 2 (June 2017)

Volume 25 (2017): Issue 1 (March 2017)

Volume 24 (2016): Issue 4 (December 2016)

Volume 24 (2016): Issue 3 (September 2016)

Volume 24 (2016): Issue 2 (June 2016)

Volume 24 (2016): Issue 1 (March 2016)

Volume 23 (2015): Issue 4 (December 2015)

Volume 23 (2015): Issue 3 (September 2015)

Volume 23 (2015): Issue 2 (June 2015)

Volume 23 (2015): Issue 1 (March 2015)

Volume 22 (2014): Issue 4 (December 2014)

Volume 22 (2014): Issue 3 (September 2014)

Volume 22 (2014): Issue 2 (July 2014)

Volume 22 (2014): Issue 1 (March 2014)

Volume 21 (2013): Issue 4 (December 2013)

Volume 21 (2013): Issue 3 (September 2013)

Volume 21 (2013): Issue 2 (June 2013)

Volume 21 (2013): Issue 1 (March 2013)

Volume 20 (2012): Issue 4 (December 2012)

Volume 20 (2012): Issue 3 (September 2012)

Volume 20 (2012): Issue 2 (June 2012)

Volume 20 (2012): Issue 1 (March 2012)

Volume 19 (2011): Issue 4 (December 2011)

Volume 19 (2011): Issue 3 (September 2011)

Volume 19 (2011): Issue 2 (June 2011)

Volume 19 (2011): Issue 1 (March 2011)

Volume 18 (2010): Issue 4 (December 2010)

Volume 18 (2010): Issue 3 (September 2010)

Volume 18 (2010): Issue 2 (June 2010)

Volume 18 (2010): Issue 1 (March 2010)

Slovak Journal of Civil Engineering

 The Slovak Journal of Civil Engineering (SJCE) is an international scientific journal published by the Faculty of Civil Engineering of The Slovak University of Technology. The SJCE aims to become a multidisciplinary forum for the presentation of original contributions and the exchange of knowledge in the broad field of civil engineering. The Journal covers topics in Architecture and Construction Engineering, Environmental Engineering, Materials Engineering, Structural Engineering, Water and Sanitary Engineering, Transportation Engineering, Surveying and Geodesy. The editors of SJCE do not wish to restrict the topics suitable for publication, but would suggest some guidelines. Submitted material should report on original work which may cover either scientific or technological developments. Interdisciplinary contributions covering the economic or environmental aspects of civil engineering are also welcomed.   The Slovak Journal of Civil Engineering aims at topics which expand the boundaries of knowledge on the interface between academic research and practical applications in the broad fields of the theory of civil engineering, design and technology sectors. By providing an international forum for the interchange of information and up-to-date issues from around the world, it aims to serve the interests and needs of civil engineering scientists, applied researchers, advanced practitioners, and professionals.   Rejection Rate    25%      All manuscripts are subject to double blind peer review by two internationally recognised experts. The journal does not have article processing charges (APCs) nor article submission charges.   Regístration number of Ministry of Culture of Slovakia : EV 47/22/EPP.   Archiving   Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.   Plagiarism Policy   The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 