bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of the Performance of Prestressed Ribbed Panels and Hollow Core Panels Supported on Four-Edges
Authors: Zając Jakub , Drobiec Łukasz 
Published: December 2021

Abstract
Tests of full-scale models of the precast slab with dimensions of 6.30 x 6.30 m, built of two different precast panels, were carried out under short-term load. The models were made of autoclaved aerated concrete (700 type) brick with a thickness of 240 mm and a height of 2.24 m. The slabs were supported at four edges. The first slab was precast prestressed ribbed panels with concrete overtopping. The second slab was made of prestressed hollow-core panels. The panels had the same modular width of 600 mm. Tests were carried out under load placed on the top of the slab. The short-term load was applied sequentially, and displacement measurements were measurement by the electronic method. The load was initially applied evenly distributed. In the last step, part of the load was transferred to one-half of the slabs. The obtained load was different for each half of the slab. The first part of the slab were panels 1 to 5, loaded with the value of 1.7 kN/m2, and the second part was panels 6 to 10 loaded with the value of 7.7 kN/m2. The tests allow determining the difference in slabs' performance depending on shear key construction. The panels maintained the possibility of load redistribution based on their interaction despite the longitudinal joints' work only through the concrete cross-section. The slabs had a different character of transverse displacements depending on the presence of concrete topping. The models revealed a different response to transferring part of the load to one-half of the slabs. There were no cracks in the line of longitudinal joints on the upper surface of the slabs. Also, there were no cracks on the bottom of the panels. At the panels' connection with the wall, rotation and lifting corners of the slabs were noticed. The measured displacements were significantly smaller than for the corresponding models of single-span slabs with a parallel load.
Non-destructive Testing of Wooden Elements
Authors: Zielińska Monika , Rucka Magdalena 
Published: December 2021

Abstract
Examining the condition of wooden elements is crucial from the perspective of proper structure performance. If the deterioration in the internal wood condition, which displays no symptoms visible from the outside, is detected, the further spread of the deterioration can be prevented. Test results often point to the necessity of conducting repairs and, renovations, replacing the structure of wooden beams, or even substituting a significant part of the structure. To achieve acceptable results, test methods should take into account the anisotropic nature of wood, which includes the shape of annual rings, as well as the location of the core in crosssection. To adopt methods based on physical effects, profound knowledge of wood physics is needed, particularly of interdependence. Apart from simple tests such as a visual inspection or tapping that are used to determine near-surface defects, non-destructive testing (NDT) plays an important role in the process. This paper presents the methods of non-destructive testing of wooden elements. These methods include tests conducted with ground penetrating radar (GPR), thermal techniques, microwaves, acoustic emission, ultrasonic tomography, and X-ray tomography. The paper summarises the use of non-destructive methods, indicating their advantages, disadvantages as well as some limitations.
From Seismic Instrumentation Towards Disaster Prevention and Mitigation
Authors: Dragomir Claudiu Sorin , Dobre Daniela 
Published: December 2021

Abstract
The present paper describes the current technical achievements in seismic instrumentation and monitoring within a national network and the role of this developed concept in disaster prevention and mitigation, in particular case of Romanian seismicity. Many studies are being conducted in the field of structural health monitoring, for seismically instrumented/monitored buildings, based on existed sensor technology, seismic data acquisition systems, data communication and information flow, computer hardware/software engineering, new solutions for seismic data transfer etc. Seismic records in free-field and on buildings are capitalised in anti-seismic design, development of technical and technological solutions in construction, seismic evaluation and rehabilitation of buildings, as well as in the process of education and earthquake preparedness. It aimed also to create a virtual seismic network (through Internet, WAN property networks, public analogue telephone network). It is a national priority creating a preventive culture in order to mitigate the seismic risk, starting with the strengthening of buildings, upgrading of the code for seismic design, seismic instrumentation as a usual practice and continuing with public communication and information actions, empowering communities and decision-makers related to the risks, prevention measures, what behaviour to be adopted. The efforts of last years show that Romania has taken important steps in preparing a response according to the challenges induced by the existing seismic sources from the entire territory of the country.
Hydraulic Analysis of Design of Flood Protection Measures in Lowland Conditions
Authors: Šoltész Andrej , Mydla Jakub , Leško Peter , Honti Richard 
Published: December 2021

AbstractThe goal of the contribution is to analyse and review the possibilities of flood protection in hydrological, morphological and geological conditions of the East Slovak Lowland, specifically the flood protection of the county city Trebišov. The flood situation is caused very often by the Trnávka stream flowing along the city. The analysis was performed by mathematical modelling using HEC-RAS software. Based on Trnávka drainage basin reconnaissance, own measurements in situ and study literature relating thereto a proposal of several technical measures for safe run-off in the Trnávka river bed has been elaborated and consequently evaluated from hydraulic point of view.
Hydraulic Review of the Flood Protection Measures in Bardejov
Authors: Šoltész Andrej , Cubanová Lea , Mydla Jakub , Cerveňanská Michaela , Baroková Dana 
Published: December 2021

Abstract
The contribution is dedicated to hydraulic analysis of the flood protection of county town Bardejov in the north-east part of Slovakia where after numerous floods on the Topľa River the flood protection has been constructed just partially in the central residential area of the city (phase I.) Next phases II. and III., which append to phase I. upstream and downstream are currently in a process of evaluation, so the flood protection of the city is far from being complete. The submitted article deals with hydraulic assessment of realized flood protection measures and their impact on proposal of phases II. and III. Authors have solved the given problem using mathematical modelling of open channel flow for steady and unsteady conditions of flood discharge at really measured flood wave in the year 2010 which was very close to the value of Q100 water. At the same time, they have proposed flood protection measures on the Topľa River in localities which are not considered and not solved by present realized flood protection. Proposed flood protection measures downstream and upstream of the realized flood protection were proven by mathematical modelling in HEC-RAS software program and they should get under control even the historical flood which appeared in Bardejov City in 2010.
Mathematical Modelling to Control the Chemical Composition of Blast Furnace Slag Using Artificial Neural Networks and Empirical Correlation
Authors: Cardoso Wandercleiton , Barros Danielle , Baptista Raphael , Felice Renzo di 
Published: December 2021

Abstract
Portland cement additions have been used for many years with the main objective of reducing the amount of clinker. Among the additions, blast furnace slag, resulting from the production of pig iron, that is, reusing this by-product, reduces the emission of carbon dioxide as well as decreases the exploitation of natural limestone and clay reserves, which are raw materials for Portland clinker. In order to reduce these emissions and increase the availability of raw materials, research has been directed to study clinker-free binders, as is the case with activated alkali cements and supersulfated cements. In this way, alkali-activated cements can only involve the reuse of industry by-products and do not require the calcination of the raw material, thus reducing the emission of polluting gases into the atmosphere. Supersulfated cement are composed of up to 90% blast furnace slag, in addition to 10 to 20% calcium sulfate. One of the most important characteristics of blast furnace slag is the ratio of the content of CaO and SiO2, also known as the simplified basicity index (B2). This paper proposes the mathematical modeling of an artificial neural network to predict the final chemical composition of the blast furnace slag to be produced based on the operational parameters of the blast furnace aiming its use in the production of special cements such as alkali-activated cements and supersulfated cements. The high values of (R) associated with low values (RMSE) show the good statistical performance of ANN demonstrating that the mathematical model is efficient to carry out the forecast of the production of blast furnace slag.
Effects of Substrate Texture and Moisture Conditions on Ultra-High Performance Concrete and Silica Fume Concrete Overlay Bond Strengths
Authors: Toledo William K. , Newtson Craig M. 
Published: December 2021

Abstract
Direct tension tests were conducted to investigate the effects of substrate moisture conditions and texture on ultra-high performance concrete (UHPC) overlay bond strengths. Improper substrate surface preparation can result in inadequate bond strengths and, in severe cases, lack of bond. To demonstrate the importance of surface preparation, pull-off tests were performed on overlaid slabs that had two extreme substrate surface moisture conditions (saturated and dried) prior to overlay application. Saturated slabs had a tined, tined-light sand blasted, or tined-medium sand blasted substrate surface texture. Dried slabs had either a tined or an exposed aggregate surface texture. Saturated specimens with tined, tined-light sand blasted, and tined-medium sand blasted surface textures achieved average bond strengths of 0.924, 1.45, and 1.95 MPa, respectively. Dried substrate surfaced specimens had zero bond strength. Surface moisture conditions that ranged from saturated to dry were also investigated by allowing the substrate surfaces to dry for 15, 30, 45, and 60 minutes prior to application of an UHPC overlay. Tined-light sand blasted specimens with surfaces that dried for 15, 30, 45, and 60 minutes achieved average bond strengths of 2.86, 2.01, 1.59, and 0.165 MPa, respectively. Results showed tined-light sand blasted specimens with proper saturating achieved adequate bond strengths, and properly saturated, tined-medium sand blasted specimens produced excellent bond strengths. Results also exposed the drastic consequences of not maintaining a saturated substrate surface prior to overlay application and delaying overlay application up to 60 minutes can drastically reduce bond strength.
Acoustics of a School Building Made in Wooden Technology on the Example of Building from the Second Half of the 19th Century
Authors: Nowoświat Artur , Olechowska Marcelina , Żuchowski Rafał 
Published: December 2021

Abstract
The Władysław Matlakowski School in Zakopane was established in 1877. After the war damage, during the Communist rule in Poland the school was rebuilt and renovated. As a result, the original character of the classrooms was distorted. Fiberboards used for interior finishing changed the acoustic climate of the rooms. The reverberation time of the tested rooms considerably exceeds 2 seconds for low frequencies and is below 2 seconds for medium frequencies. Thus, the reverberation conditions do not differ from typical school classrooms in Poland. The tests of reverberation conditions were supplemented by the measurements of acoustic insulation of partitions separating the chool classrooms from each other and from the corridor. The studies allow to infer that the noise possibly comes from the corridors or adjacent rooms.
Costing, Adobe Technique as a Sustainable Construction System in the City of Cuenca
Authors: Molina Verónica , Angumba Pedro 
Published: December 2021

Abstract
Adobe is an old material used in construction but over time, this construction system has lost space and preference among population. Hence, the need to seek alternatives as professionals in the construction area to encourage the use of the Adobe technique has raised. Thus, the present study made a cost of the items involved in the construction of houses from the adobe based on the theoretical references. In addition, it established a unit price analysis that identifies the particularities of this system focusing on an analytical, descriptive-conclusive methodology whose data are analysed from the results of applying a survey (n = 96) to the inhabitants of the rural sector of Cuenca and construction experts (n = 11). The average price of the construction of houses with Adobe is $ 38,357.23 dollars for a house of 150 m2 taking into account that the real costs and the construction activity are sensitive to changes in the population and market prices.
Evaluation and Analysis of Unit Prices of a Rammed Earth Construction System
Authors: Ordoñez Hernán , Angumba Pedro 
Published: December 2021

Abstract
The tapial is part of the traditional construction worldwide, which uses environmentally friendly materials of natural origin such as raw earth, wood and water for its manufacture. The construction technique was used for the construction of habitable spaces, which are part of the ancestral construction system of our country; Despite the above, no updated studies on the costs required in the construction process have been identified in Ecuador. This is mainly due to the constant development of new technologies that introduce new construction systems to the market that use industrialized materials for their manufacture. Therefore, this document evaluated and analyzed the unit prices of the items involved in the construction of works using mud as its main component. Field and exploratory research was applied, through the application of surveys to a sample of 97 professionals of Civil Engineering and Architecture in the city of Cuenca, as well as 30 professionals with experience in construction of the indicated construction system. The Unit Price Analysis determined that the average cost of a 140 m2 typical house is $ 46,236.64 with an estimated cost of $ 330.26 per square meter; Similarly, the study determined a maximum cost of $ 53,172.14 USD with a value of $ 379.80 USD per square meter and a minimum value that represents $ 39,301.14 with a cost per square meter of $ 280.72.
Recommendations for Directing the Success of Roads Projects Management, Analysis of Triple Restriction
Authors: Armijos Edison Carlos Patiño , Quito Mercedes Gabriela Jaramillo 
Published: December 2021

Abstract
The present Project is developed in Ecuador, Morona Santiago Province as a response to prior research that determined the failure of projects execution is due to the poor management of restrictions set by the director project. This research constitutes a contribution to Scientific knowledge about Project Management, primary factors influencing the failure of projects and recommendations for the achievement of success on roads construction projects. In order to get the stablished objective in this study, it was necessary the analysis of the conditions on which roads projects were executed and completed over the years 2018, 2019, and 2020 by the Decentralized Autonomous Government of Morona Santiago on the modality of procurement, and it was also important to stablish the causes that contributed to a particular outcome on projects. The approach of the analysis is focused on the management of restrictions of costs, time, and scope (triple restriction) of projects in study. The technique that was used is the analysis of the content that was applied to contractual records of 81 hired projects by selection of minor amount, price, bid, reverse auction, and contingency plan according to the Ecuadorian legislation for public works procurement. For the record and further data analysis, the information was encoded identifying in contractual files the causes that directly or indirectly led to categories of costs management, time and scope of projects. The results achieved show the causes that contributed to the failure of projects and the state in which they were finished in terms of initially stablished costs, time and scope. The obtained information was the basis to come up with recommendations referring the good practices on projects management that will work people in charge of projects management of roads constructions in order to obtain success on future projects.
Microzonification of Floor with Sliding in Nulti Parish
Authors: Parra Diana del Rocío Urgiles , Noboa Juan Sebastián Maldonado , Sánchez Luis Mario Almache 
Published: December 2021

Abstract
Cuenca is located on three areas controlled by mega faults and 14 areas at risk from landslides. One of them is the Nulti community that registers landslides in 16 subzones during the past 10 years. The waters presence on the ground is one of the causes of these earth movements, and this generated infrastructural and environmental losses. According to the update of the Development and Land Management plan, the Santa Cecilia Pasto Romero neighborhood is one of the affected areas. This community is located in the Parish Center. This place lost a considerable number of houses and equipment like educational, health, religious, administrative infrastructure, because it has landslides of great magnitude. Given these antecedents, we carried out a study that allows to know the behavior of this soil against seismic waves and identify risk areas, their properties such as soil type, allowable loads, and elasticity modulus. In this way, the risks presented by these landslides were determined from a soil profile by processing the results of the Geophysical analysis like seismic refraction tests, standard penetration, and electrical soundings. This study generates future lines of research like slope stabilization and drainage designs. This study opens the possibility of being replicated in the other parishes of Cuenca. The subsoil presents a cohesive material with high plasticity. The soil has deposits with silty clay matrices of high plasticity. This mass of soil has been removed by the effects of landslides and colluvial deposits. Therefore, its low shear wave velocities expose loose soils of high plasticity and medium to high expansivity.
Classification of historical buildings based on energy efficiency tests and comfort tests
Authors: Fedorczak-Cisak Małgorzata 
Published: December 2021

Abstract
The article presents a proposal for the classification of historic buildings in terms of improving energy efficiency, ensuring the comfort of users and their impact on the environment. In the case of historic buildings, Polish law does not require energy efficiency improvement. The proposed classification also takes into account the function of the object and is largely based on "in situ" research. The presented model of classification will help users of historic buildings to undertake appropriate thermo-modernization measures to improve energy efficiency and comfort of use. In situ tests in historic buildings are of particular importance also for the correct diagnostics of this type of buildings.
Use of recycled materials in bricks
Authors: Krenzel Vladimír , Srek Jakub , Mikoláš Milan , Fiala junior Jan Bedřich , Fiala Jan 
Published: December 2021

Abstract
In our presentation we are trying to clarify possibility of adding recycled materials into bricks and to name the changes of characteristics of individual additives. When we remind that the first ceramic decorative figure was The Venus of Věstonice. Babylonian gardens, Hagia Sofia, one of the most beautiful churches that has ever been built. The great Wall of China – The biggest brick creation in the world, medieval castle Malbork built in northern Poland not far from Gdansk's bay which with its size resembles small town, Skyscraper Chrysler Building in New York. All of these buildings have one thing in common and that is material from which they were built. After obtaining this knowledge, we have known for 10.000 years. Many types of modification of full bricks followed. Then the advancement ensued.
Study Results and Achieving High Ventilation Air Quality in Architecture for a Public Utility Building – Shopping Centre in Mielec, Poland
Authors: Wrana Jan , Struzik Wojciech 
Published: December 2021

Abstract
The purpose of the current study is to utilise a novel technology that is expected to bring reductions in electrical and heat energy consumption and cut CO2 emissions in the shopping centre public utility building in Mielec. The building is equipped with systems for obtaining heat and cold from groundwater and features the energy consumption level of a passive building with the lowest primary energy ratio (PER) in Poland. This state-of-the-art, innovative, energy-efficient and environment-friendly FCH system with BMS control was subjected to numerous tests and analyses, the details of which will be presented further in this paper. The design assumptions were confirmed and all work parameters were recorded for the system under extreme conditions, including the determination of final energy (FE) and primary energy (PE).
Graph-domain features and their application in rotating machinery fault diagnosis
Authors: Gao Yiyuan , Du Wenliao , Gong Xiaoyun , Yu Dejie 
Published: December 2021

Abstract
To more effectively extract the non-stationary and non-linear fault features of mechanical vibration signals, a novel fault diagnosis method for rotating machinery is proposed combining time-domain, frequency-domain with graph-domain features. Different from the conventional time-domain and frequency-domain features, the graph-domain features generated from horizontal visibility graphs can extract the fault information hidden in the graph topology. Aiming at the problem that too many features will lead to information redundancy, the Fisher score algorithm is applied to select several of sensitive features which are then fed into the support vector machine to diagnose the faults of rotating machinery. Experimental results indicate features extracted from the three domains can be used to obtain higher diagnosis accuracy than that extracted from any single domain or dual domains.