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On Relative Success in Obtaining Grants for Smart Cities in the European Union and on the Cost of the Outcome 欧盟智能城市拨款的相对成功率及成果成本
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2024-03-01 DOI: 10.2478/sjce-2024-0004
Tomáš Koreň, Ondrej Gajniak, M. Kubák
{"title":"On Relative Success in Obtaining Grants for Smart Cities in the European Union and on the Cost of the Outcome","authors":"Tomáš Koreň, Ondrej Gajniak, M. Kubák","doi":"10.2478/sjce-2024-0004","DOIUrl":"https://doi.org/10.2478/sjce-2024-0004","url":null,"abstract":"\u0000 The concept of smart cities is gaining momentum with efforts to go greener and be more sustainable along with the growing demand for data-driven policies. The European Union (EU) is highly committed to fostering sustainable urban development through targeted funding programs that encourage innovation, collaboration, and practical solutions for climate-neutral and smart cities. We have used data mining on the data of the Community Research and Development Information Service (CORDIS) and Eurostat during 2014 – 2022, to analyze such projects. Firstly, we can report that in absolute measures, Germany, Spain, France, Sweden and Lithuania have obtained the largest amounts of money fromthe EU Horizon program to support the development of smart cities. Secondly, we have found that when accounting for the size of funding per capita, Estonia leads in terms of funds invested in smart cities followed by Luxembourg, the Netherlands, Finland, and Cyprus. Focusing our attention on the cost of outcomes, i.e., the efficiency of spending funds on smart cities, we can see that the leading countries in the EU are Romania, Switzerland, Norway, and Luxembourg. The authors have compared the success of European projects in their different phases, while considering the overall results as most relevant for our evaluation.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140405463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Simplified Approach for the Evaluation of the Non-Visual Potential of Daylight in Side-Lit Rooms 评估侧光房间日光非视觉潜力的简化方法
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2024-03-01 DOI: 10.2478/sjce-2024-0003
Tomáš Josai, Jozef Hraška, Tomáš Bacigál
{"title":"A Simplified Approach for the Evaluation of the Non-Visual Potential of Daylight in Side-Lit Rooms","authors":"Tomáš Josai, Jozef Hraška, Tomáš Bacigál","doi":"10.2478/sjce-2024-0003","DOIUrl":"https://doi.org/10.2478/sjce-2024-0003","url":null,"abstract":"\u0000 This article reports on the development, validation, workflow and implementation of a simplified method for evaluating the non-visual (melanopic) potential of daylight in typical side-lit rooms. The method is suitable for climatic areas with a dominant occurrence of cloudy skies. The non-visual daylight evaluation tool is based on a modified average daylight factor method. A simplified daylighting model improves the calculation of the vertical daylight factor and the passage of daylight through a vertical lighting opening. The proposed calculation method makes it possible to determine the illuminance of a vertical plane in the interior. The method is based on the uniform sky and the external diffuse horizontal illuminance at the location of interest. The outputs of the tool can also be used to quickly estimate visual levels of daylight. The article also proposes a classification of the availability of melanopic daylight in side-lit rooms, which is based on the outputs of the proposed calculation method.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140406888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Properties of Olive Stones with a View to Their use as Lightweight Aggregate in Construction Mortars 橄榄石的特性及其在建筑砂浆中作为轻质骨料的用途
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2024-03-01 DOI: 10.2478/sjce-2024-0007
Michal Kuruc, Zuzana Štefunková
{"title":"Properties of Olive Stones with a View to Their use as Lightweight Aggregate in Construction Mortars","authors":"Michal Kuruc, Zuzana Štefunková","doi":"10.2478/sjce-2024-0007","DOIUrl":"https://doi.org/10.2478/sjce-2024-0007","url":null,"abstract":"\u0000 In countries that are big producers of olive oil such as Spain, Italy, or Greece, large amounts of olive husk remain as waste from processing olives and pose a serious environmental issue. One of the solutions could be to use this waste to partially replace sand in cement mortar to preserve the environment, decrease the consumption of cement, and improve economic benefits. This work presents our initial results which show the viability of using olive waste as an aggregate in cementitious mortars, indicating that the organic materials studied can be promising for this purpose.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140402260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Strapping Straps Waste Fibers on Fresh and Hardened Properties of Concrete 打包带废纤维对混凝土新拌和硬化性能的影响
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2024-03-01 DOI: 10.2478/sjce-2024-0001
R. Djebien, Rachid Kebout, M. Belachia
{"title":"Effect of Strapping Straps Waste Fibers on Fresh and Hardened Properties of Concrete","authors":"R. Djebien, Rachid Kebout, M. Belachia","doi":"10.2478/sjce-2024-0001","DOIUrl":"https://doi.org/10.2478/sjce-2024-0001","url":null,"abstract":"\u0000 Faced with the increasingly growing need for construction material resources and the strict requirements and conditions for preserving the environment, it has become necessary and relevant to study all possibilities and opportunities for the recycling and valorization of industrial waste and by-products in the construction field. Strapping straps is a product used to bundle and transport goods and construction materials. After its use, it is considered as waste. The objective of this experimental work is to study the possibility of reusing the strapping strap waste as fibers in the production of fiber-reinforced concrete. For this purpose, three families of concrete were composed using strapping strap fibers, steel fibers, and polypropylene fibers, which were introduced into a concrete composition by volumetric substitution (0.4%, 0.8% and 1.2%) of aggregates. The fresh properties were evaluated through slump, density and air content tests. Hardened properties were investigated using the compressive and flexural strengths, pulse velocity, dynamic elastic modulus, and water absorption tests. The results obtained showed that strapping strap waste fibers significantly improve the mechanical properties of fiber-reinforced concrete and have a behavior similar to that of steel fibers. The optimum rates of strapping strap fibers were 0.4% and 1.2% for compressive and flexural strengths respectively. Compared to polypropylene fibers, the strapping strap fibers were found to be more efficient and led to a gradual increase in flexural strength with an increase in the strapping strap fibers. The results obtained also showed that the increase in strapping strap fiber content gradually increased the water absorption of fiber-reinforced concrete.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140407075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of the Development of Bicycle Transport from the Point of View of the Inhabitants of the City of Bratislava 从布拉迪斯拉发市居民的角度看发展自行车交通的影响
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2024-03-01 DOI: 10.2478/sjce-2024-0006
Jakub Takács
{"title":"The Effect of the Development of Bicycle Transport from the Point of View of the Inhabitants of the City of Bratislava","authors":"Jakub Takács","doi":"10.2478/sjce-2024-0006","DOIUrl":"https://doi.org/10.2478/sjce-2024-0006","url":null,"abstract":"\u0000 As part of a change in the division of transport work, bicycle transport has made the most progress in recent years. As the largest city in Slovakia Bratislava, is trying to keep up with foreign cities. In recent years, it has developed projects that have made it possible to increase the development of cycling in the city. The last major cycling survey was conducted in 2011 by Cyklokoalicia. This survey aims at determining the momentum of bicycle traffic by identifying its greatest shortcomings or, conversely, the most positives. The data from the analysis given will also be used to develop a concept for the development of bicycle transport in the city of Bratislava.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140406055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calibration of Hypoplastic Parameters for Danube Sand 校准多瑙河沙的低塑性参数
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2024-03-01 DOI: 10.2478/sjce-2024-0005
Amir Mosallaei, András Mahler
{"title":"Calibration of Hypoplastic Parameters for Danube Sand","authors":"Amir Mosallaei, András Mahler","doi":"10.2478/sjce-2024-0005","DOIUrl":"https://doi.org/10.2478/sjce-2024-0005","url":null,"abstract":"\u0000 The relationship between stress and strain tensors in soil is described by the soil constitutive equation, which depends on the soil type and deformation conditions. The development of various constitutive models has enabled a better understanding of the macromechanical properties of soil. One such model is hypoplasticity, which was discovered more than three decades ago. The purpose of this study is to determine whether hypoplasticity could accurately represent the behavior of Danube sand, a specific type of sand. The researchers conducted laboratory measurements to obtain the eight basic hypoplastic parameters of Danube sand and employed the intergranular strain concept as an extension of hypoplasticity to achieve a more precise material behavior. All the parameters were then utilized to simulate the cyclic triaxial test using the SoilTest Module of PLAXIS. The results showed that the hypoplastic constitutive simulation model for Danube sand was capable of making relatively accurate predictions for accumulative settlement.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140400471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Non-Linear Behavior of Double-Layered Grids 双层网格的非线性行为
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2024-03-01 DOI: 10.2478/sjce-2024-0002
Tarek Metrouni, Nadia Khellaf, K. Kebiche
{"title":"Non-Linear Behavior of Double-Layered Grids","authors":"Tarek Metrouni, Nadia Khellaf, K. Kebiche","doi":"10.2478/sjce-2024-0002","DOIUrl":"https://doi.org/10.2478/sjce-2024-0002","url":null,"abstract":"\u0000 This study presents a numerical approach to an analysis of the mechanical behavior of double-layered tensegrity grids. We present a comparative study on the behavior of tensegrity grids through geometric nonlinear analysis (GNA) and combined nonlinear analysis (CNLA) (geometric and material), considering the possible effect of evolution in the elasto-plastic domain of the cable elements. The effect of the relaxation of cable on the amplification of the displacement of these grids was taken into account. The updated Lagrangian formulation, which modifies the Newton-Raphson iterative scheme with incremental loading, was adopted. We have developed a numerical computational model specific to tensegrity structures that simulates the geometric and material nonlinear behavior. The reliability of the calculation tool developed has been validated. Additionally, the results of the application of the numerical model on a grid, which was generated based on demi-cuboctahedral tensegrity cells, are presented.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140398521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Repair of Cracks in Concrete with the Microbial-Induced Calcite Precipitation (MICP) Method 用微生物诱导方解石沉淀（MICP）法修复混凝土裂缝
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0021
Hacer Bilir Özhan, Musa Yildirim, Hamdi Öğüt, H. Öz
{"title":"Repair of Cracks in Concrete with the Microbial-Induced Calcite Precipitation (MICP) Method","authors":"Hacer Bilir Özhan, Musa Yildirim, Hamdi Öğüt, H. Öz","doi":"10.2478/sjce-2023-0021","DOIUrl":"https://doi.org/10.2478/sjce-2023-0021","url":null,"abstract":"Abstract In this study, the microbiologically-induced calcium carbonate precipitation (MICP) method was employed to examine its potential for repairing cracks in concrete. In addition, specific gravity and porosity values were measured to examine the effect of calcite formations on concrete surfaces and microstructures. Bacteria-supplemented concrete repaired cracks up to 0.4 mm wide by filling them with CaCO3. Furthermore, this study not only examined the healing of the width but also the length of cracks. However, as the width of the treated cracks decreased, their length increased. This indicated that the MICP treatment is more effective in a limited crack range. Specific gravity values increased, and porosity values decreased in concrete supplemented with calcifying bacteria. SEM analyses showed that calcite is a bacterial product that forms a very tight bond with a cement gel and that calcite fills visible cracks and voids and creates more of a void-free and undamaged concrete structure.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139191264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Angle of the Shear Resistance of Danube Gravel Derived from the Dynamic Penetration Test 动态渗透试验得出的多瑙河砾石抗剪角度
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0026
E. Kučová, Jana Frankovská
{"title":"The Angle of the Shear Resistance of Danube Gravel Derived from the Dynamic Penetration Test","authors":"E. Kučová, Jana Frankovská","doi":"10.2478/sjce-2023-0026","DOIUrl":"https://doi.org/10.2478/sjce-2023-0026","url":null,"abstract":"Abstract The dynamic penetration test was used to investigate the angle of shear strength of Danube gravel. The correlations for its determination are available in the standards and literature. From the data set of the results, the characteristic value of the angles of shear strength was derived according to the recommended statistical procedure from the second generation of Eurocode 7. The characteristic values of the angle of shear strength were evaluated for well-graded gravels, poor-graded gravels, and gravels with fine-grained particles of the Danube. The correlations, which were based on field tests and considered the genesis of the soil, were compared with laboratory test results and a table of the values from the Slovak standard, which are used for purposes of comparison. In our research we compared the characteristic field values of the angle of shear strength obtained in the laboratory to observe the effect of their genesis on the appropriateness of the correlations used. We conclude with recommendations for the regional correlations and suggest values of the angle of shear strength for the classes of gravels tested.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139188830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the Indoor Climate in a Small, Newly-Built Auditorium 新建小型礼堂的室内气候分析
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0025
Mária Budiaková
{"title":"Analysis of the Indoor Climate in a Small, Newly-Built Auditorium","authors":"Mária Budiaková","doi":"10.2478/sjce-2023-0025","DOIUrl":"https://doi.org/10.2478/sjce-2023-0025","url":null,"abstract":"Abstract The article focuses on an analysis of the indoor climate in a small, newly-built auditorium. Providing optimal indoor climate parameters in the interiors of a university is extremely important for students. Meeting these parameters is essential not only from a physiological point of view, but also to achieve desirable student performances. The parameters of CO2 concentration are also influenced by the air distribution system in a small auditorium. The correct positions of the supply and extract air is very important. The first experimental measurements of CO2 concentration were carried out in a small auditorium in an old building. The natural ventilation of the small auditorium was evaluated. The second experimental measurements of the CO2 concentration were made in a small auditorium in a newly-built building. The ventilation system and the modern air distribution system of the small, newly-built auditorium were evaluated based on the CO2 concentration and the PMV index. A Testo 480 was used for the measurements. The conclusion of this paper contains the recommendations for the design of a newly-built ventilation system in a small auditorium.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139195274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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