bluuebunny/crossref_metadata_2025 huggingface dataset:
TOXIC POTENTIAL OF ANABAENOPSIS ELENKINII (CYANOBACTERIA) ISOLATED FROM A BLOOM IN LAKE VAYA (BULGARIA)
Authors: Teneva Ivanka , Moten Dzhemal , Belkinova Detelina , Mladenova Tsvetelina , Dzhambazov Balik
Published: October 2023

Cyanobacteria are ancient photosynthetic organisms that under certain conditions (high temperature, eutrophication) can grow rapidly and form "cyanobacterial blooms". Very often, these blooms are accompanied by production of cyanotoxins, which in most cases are dangerous to the other organisms. Knowing the producers of cyanotoxins is of utmost importance, especially today when climate change has been shown to increase the frequency of toxic cyanobacterial blooms worldwide. The aim of the present study was to characterize the toxic potential of the cyanobacterium Anabaenopsis elenkinii V.V.Miller 1923 isolated from Lake Vaia during a cyanobacterial bloom. The isolated strain (Anabaenopsis elenkinii) was identified based on a morphological analysis using light microscopy, and its taxonomic affiliation and phylogenetic position were confirmed by applying the Maximum Likelihood (ML) method for phylogenetic analysis based on the 16S rDNA sequence. The production of cyanotoxins was analyzed by applying immunological methods (ELISA) for detection of microcystins, cylindrospermopsin and saxitoxins. The toxic potential of Anabaenopsis elenkinii was evaluated in vitro by methyl-thiazole-tetrazolium (MTT) cytotoxicity and superoxide dismutase (SOD) activity assays using HT-29 cells. Our analyzes indicated that Anabaenopsis elenkinii produces microcystins (0.42 ng/mL), cylindrospermopsin (0.10 ng/mL) and saxithixins (0.05 ng/mL). The MTT cytotoxicity assay showed that the medium, in which the cyanobacterial strain was grown, significantly reduced the viability of HT-29 cells and this effect was dose- and time-dependent. In addition, 50% inhibition of the SOD activity was also observed. This is the first report of Anabaenopsis elenkinii as a producer of cyanotoxins. Our results provide valuable information about the toxin-producing cyanobacteria. They demonstrate the potential danger of "cyanobacterial blooms" where Anabaenopsis elenkinii is a dominant species.
USE OF ECOSYSTEM SERVICE ASSESSMENTS FOR SUSTAINABLE SPATIAL PLANNING PURPOSES
Authors: Yarlovska Nadezhda , Mondeshka Margarita
Published: October 2023

The aim of the study is to look for ways for applying the principles of sustainable development in spatial planning through approaches that reflect modern trends in the field of ecosystem research, environmental protection and provide an optimal living environment. For this purpose, the regulatory documents for spatial planning in Bulgaria were analyzed, as well as the possibilities for applying within their framework approaches for objective assessment of the ecosystem�s state and their capacity to provide ecosystem services.
Exploring the processes of unreasonable expansion of the urban territories on agricultural lands, a specific tool is proposed through integrating the assessment of the material, regulating, supporting and cultural ecosystem services in the process of planning decisions elaboration. This approach enables an objective evaluation of the results of the change of the main purpose of the lands - one of the most important and valuable natural resources, especially for Bulgaria � the soil resources. And also how these changes will affect the provision of ecosystem services that most fully determine the quality of the living environment.
WASTEWATER REUSE AND RECYCLING STRATEGIC MANAGEMENT
Authors: Zyder Vaclav , Hubacek Jaroslav , Ameir Omar , Piecha Marian
Published: October 2023

Even if the total amount of water in the world remains the same, we observe a constant deterioration of water quality, water ecosystems and the surrounding environment of water courses and reservoirs. At the same time, the costs of treatment of surface and underground water for drinking water. For this reason, the pollution limits for wastewater treatment plants of all types are constantly being tightened, which increases the already high costs of their operation and often increases in the increased prices for wastewater. One of the possible solutions for reducing these costs, or at least maintaining them at the current level, is to invest in new technologies that will enable stricter limits to be met at the same or lower costs. If more than 60% of the cost of biological wastewater treatment is accounted for by the aeration process, it seems that there could be a significant reduction in financial costs using new technologies. The aim of the authors of this article is to present the strategic management of the repeated use of wastewater recycling.
ASSESSMENT OF KNOWLEDGE AND HABITS FOR PLANNING DEMATERIALIZATION OF MUNICIPALITIES
Authors: Abele Lilita , Jermolajeva Elita , Alksne Linda
Published: October 2023

Dematerialization of local governments and environmental economics go hand in hand in pursuing sustainable development and environmental protection. Dematerialization, a concept in environmental economics, refers to reducing material consumption enabling economic growth without a commensurate increase in content consumption and associated environmental impacts [2]. This tendency to do more with less is essential to the municipalities' environmental economy. Advances in technology and the digital skills of municipal employees will be critical in accelerating the adoption of dematerialization practices in municipalities. One of the ways municipalities can transition to dematerialization is through digital management processes. Employees' digital skills are essential for the change to take place successfully. First, it is necessary to assess employees' existing skills in detail, then, based on the research results, develop a plan for improving the weakest skills in particular courses.
The aim of this study was to assess the digital competencies and work habits of municipal administration employees in municipalities of three different countries � Liepaja Municipality (ML) (Latvia), Vila Nova de Poiares Municipality (MVNP) (Portugal) and Mielec Municipality (MM) (Poland). The research was based on a survey of city council department employees and a review of the relevant literature. The survey was conducted in 2022; 279 respondents participated in it, answering 72 questions.
As a result of the research, recommendations were developed for the employees of local government administrations to improve digital competence and the transition to electronic document management, which could reduce the local government's impact on the environment and support the implementation of an environmental economy.
COOPERATION SKILL EVALUATION IN SPA AND WELLNESS SECTOR FOR SUSTAINABLE ENTERPRISE DEVELOPMENT
Authors: Berzina Kristine
Published: October 2023

Rapid development of the Spa and Wellness sector creates new opportunities for companies in the sector, but at the same time also new challenges. Sustainable development of the sector from both the environmental, economic, and social aspects is an important factor for the further success of the sector. The Spa and Wellness sector is a labor-intensive sector of the service industry, where the employees� impact on customer satisfaction is crucial. For employees to be able to successfully ensure the quality of service over a longer period, in addition to a whole series of professional knowledge, skills and competences, cooperation skills are also essential. The aim of the study is to identify the need for cooperation skills for the Spa and Wellness industry employees. Quantitative research method was chosen to evaluate two stakeholder perspectives - Spa and Wellness Employers, as well as Vocational Education and Training providers - in seven European countries - Latvia, Slovenia, France, Italy, Serbia, Greece, and Bulgaria.
NATURAL RESOURCE SIGNIFICANCE IN RURAL DEVELOPMENT TRENDS IN LATVIA: THE FIVE-YEAR PERSPECTIVE
Authors: Vitolina Zane
Published: October 2023

In the previous research by author conducted in 2016 [1], the indicators characterizing natural resources in Latvian rural municipalities were analysed, looking for connections with the overall territorial development and growth. The study concluded that there are significant differences in the development of municipalities, using the complex territorial development index (TDI) and analysing the available natural resources, such as forests, agricultural land areas, receiving EU funding, etc. The municipalities with the highest TDI values did not have significant natural resources. Their development was mainly determined by their location - close to the capital Riga, which is the largest economic centre in Latvia, thus forming a distinctly monocentric spatial structure.
The positions of the Latvian government regarding regional policy, which are included in the National Development Plan 2021-2027, are oriented towards the promotion of polycentrism, thus forming the basis for sustainable and balanced development of all territories. Policy makers point out that the fact that growth has not been territorially balanced, as inequality is still high and the growth of remote regions lags behind the Riga region, creates significant long-term risks.
This study analyses whether there have been changes in the five-year period, both in terms of the overall territorial development of rural municipalities, as well as in evaluating the changes in natural resource indicators, raising the issue of the effective use of natural resources.
THE LIBERALIZATION PROCESS OF THE ENERGY SECTOR OF ROMANIA
Authors: Popp Ruxandra-Madalina , Grasu Stelian , Busu Mihail
Published: October 2023

The energy sector is particularly important in the Romanian economy, both in terms of its size and in terms of the impact of developments in this sector on other branches of the economy. Developments in the energy sector, particularly in the electricity sector, also have social implications. As a result, the energy regulation institutions have been heavily involved in this area, using all the instruments at its disposal, both from a competition and a state aid perspective: investigation of possible infringements of competition law, sector inquiries, regulatory clearance, merger analysis, recurrent monitoring of the sector etc.
This chapter focuses on the stages of the liberalisation process, which started in 2007 for the electricity sector. The effects associated with the liberalisation process are also presented, in particular in terms of the structural changes that have occurred.
As regards the price developments observed in the energy sector, they should be seen in the context of regional developments, the recent increase in electricity prices being a European phenomenon, partly justified by the recovery of the economy after the pandemic, the level of stocks, but also by the European policy of increasing the pollution penalty.
THE NEXUS BETWEEN ENVIRONMENTAL QUALITY, ECONOMIC INEQUALITY AND DIGITAL INCLUSION
Authors: Varlamova J. , Sadyrtdinov R.
Published: October 2023

The main scientific problem to which the study is devoted is to determine the relationship between such aspects of the quality of life of the population as: environmental quality, economic inequality and digitalization of households. The relationship between the three studied areas of household life is dictated by the processes of digital transformation, the formation of a green economy, while the phenomena of population differentiation by income is increasing. Nonparametric correlation coefficients were calculated using open data from the national statistical agency for the regions of Russia for the period 2019-2022. The results of the study substantiate the presence of a statistically significant positive relationship between the Gini index and the number of Internet users. The hypothesis of a correlation between the digitalization of households and the quality of the environment was not confirmed in the sample. The relationship between environmental quality and income inequality has not been unequivocally confirmed and was observed only in 2019.
DEVELOPMENT OF RESEARCH ON BIOECONOMY INDUSTRIES IN LATVIA
Authors: Pilvere Irina , Upite Ilze , Nipers Aleksejs , Pilvere Aija
Published: October 2023

The knowledge-based bioeconomy has been prioritized through European Union (EU) research and innovation policies. In December 2017, the government approved the Latvian Bioeconomy Strategy 2030, which set the horizontal strategic goal of achieving �research excellence in traditional bioeconomy industries and efficient transfer of knowledge�. Therefore, the aim of the present research is to examine one of the submeasures �promoting research excellence and efficient knowledge transfer within traditional bioeconomy industries� for the implementation of the strategic goal of the Latvian Bioeconomy Strategy 2030 regarding �Knowledge and Innovations� in Latvia. The research found that the development of research on the bioeconomy depends on the overall situation in research and development (R&D) in the country. In 2021 in Latvia, total expenditure on scientific research was low, only 0.71% of GDP, of which 64% was EU funds and private funding. The national Smart Specialization Strategy (RIS3) defines five main fields to be developed in Latvia, and one of them is a knowledgeintensive bioeconomy. In 2018, 1600 scientists worked in this field, which was 23% of the total number of scientists engaged in RIS3 fields. The amount of R&D funding attracted to the bioeconomy field in 2014-2018 was only EUR 27 mln. or 14% of total funding for RIS3 fields, which indicated the insufficient ability of bioeconomy scientists to attract funding and their lower labour productivity. Nine main research institutions employed 89% of the total personnel engaged in the bioeconomy field, who were the authors of 98% of WoS-indexed research papers published in 2014-2018. In the future, the most important research priorities for the bioeconomy field are going to be mitigation of negative climate change impacts, as well as food and energy security.
INTERNATIONAL LEGAL REGULATION OF ENVIRONMENTAL PROTECTION DURING ARMED CONFLICT AND THE POSSIBILITY OF ITS APPLICATION IN UKRAINE
Authors: Golovko Liudmyla , Gulac Olena , Oleksenko Roman
Published: October 2023

The purpose of the article is to analyze international legal documents regarding the possibility of their application for the purpose of environmental protection during armed conflict. Special attention was paid to the provisions of international humanitarian law. The gaps that exist in this area were identified. The topic is especially relevant nowadays, when we are witnessing the significant damage caused to the environment during the armed aggression of the Russian Federation against Ukraine. Already now, the damage caused to the environment in Ukraine has reached catastrophic values. Therefore, the issue of holding the Russian Federation accountable for the damage caused to the environment is acute. The article pays special attention to this issue. A comparative analysis of the international legal support of environmental protection during armed conflicts was made. In addition, several legislative acts of Ukraine aimed at monitoring and identification of environmental damage, reports of the Ministry of Environmental Protection and Natural Resources of Ukraine were examined. International legal regulation of bringing states to responsibility for environmental damage during armed conflicts was analyzed. The insufficiency of international legal regulation in this area was revealed. The need for timely recording of damage caused to the surrounding natural environment during armed conflicts, involvement of the widest range of subjects in the collection of evidence has been proven. The article reveals Ukraine's experience in this area, which may be useful for other states.
THE AUDITOR'S ROLE IN CORPORATE SUSTAINABILITY REPORTING
Authors: Buboi (Danaila) Angelica
Published: October 2023

The development of the global economy cannot be achieved in the current context without the pillars of sustainable development. At the corporate level, the commitment for sustainability is increasingly monitored by stakeholders in terms of a company's sustainable economic capacity and also regarding its environmental sustainability. We aim to analyze the role of the auditor in corporate sustainability reporting (CSR) and to design an econometric model of reporting quality based on sustainability reports submitted by Southeast European corporations for period 2002 - 2022. The results of the study will identify the difference between sustainability benchmarks and the direct impact of these pillars on the overall ESG composite scores obtained by reporting firms during the period analyzed. The beliefs of the study highlight the role of the auditor in the non-financial reporting process and the impact of the auditor's opinion on the overall ESG composite scores. The study was performed within the doctoral school of The Bucharest University of Economic Studies.
MICROSTRUCTURAL ANALYSIS OF ALLOWANCED CEMENTITIOUS MORTAR WITH DIFERENTS NANOPARTICLES
Authors: JUDELE Loredana , BUSILA Mariana , MOCANU Elena , RUSU Ion , LEPADATU Daniel
Published: October 2023

Nanomaterials are materials with new properties that interact through complex processes at the nanometric scale that include reactions in the quantum field and which still represent an unknown for many researchers.
Improving the performance of cement mortar is generally achieved with the help of various additions. Nanoparticles have recently become a material very often used in the additive of various recipes of cementitious materials and not only, because at such a size their properties change surprisingly and their behavior passes into the quantum domain where the size and shape can produce new nanostructured materials with functions of self-repair or self-assembly.
Even if progress in this field has been made and these nanomaterials have been introduced as part of many new and modern material recipes, there are still questions related to their true influence on the physical-mechanical properties. The current paper presents the achievements in the field regarding the use of nanomaterials in the cementitious materials component, but especially the influence on their physicalmechanical properties, which seem to be slightly different depending on the technical conditions of production. In parallel the mechanical properties such as compressive strength and flexural strength were analyzed to understand the behavior and influence of nanoparticles on them. Also structural and morphological studies of samples was performed by X-ray diffraction, optical microscopy, scanning electron microscopy. As a result, presence of the (ZnO, Fe:ZnO, Fe3O4 NPs) had prominently higher mechanical properties compared to that of the traditional mortar.
OPTIMIZATION OF A ONE-DIMENSIONAL PHOTONIC CRYSTAL FOR SURFACE PLASMON RESONANCE CHEMICAL SENSING
Authors: Kroupa Jan , Lesnak Michal , Jursa Dominik , Miskay Marek , Barcova Karla
Published: October 2023

A chemical sensor of refractive index variations, which possesses prescribed resolution, is designed, implemented and tested. Enhancement of coupling forces by the Bloch surface waves is achieved by incorporating a one-dimensional (1-D) photonic crystal (PC) into the classical Kretschmann arrangement of surface plasmon resonance. The numerical optimization approach was used to establish geometrical parameters of the photonic crystal with prescribed material constituents. The number of layers, their thicknesses, and a specific role of the binding dielectric layer between the PC and the metallic film are discussed in detail. Experiments with optimally designed sensor samples compare favourably with model simulations.
POLYLACTIC ACID MODIFIED BY REACTIVE EXTRUSION TECHNOLOGY
Authors: Kalendova Alena , Urbaskova Martina , Reznicek Pavel , Merinska Dagmar , Hassouna Fatima
Published: October 2023

In recent years there has been an increase in interest in biodegradable polymers. Biopolymers are upcoming competitors for the synthetic polymers with their profound attributes like eco-friendliness and biodegradability. They can be classified as natural biopolymers, chemically synthesized biopolymers, and microbial biopolymers. One of the most widely used chemically synthesized biopolymers is aliphatic polyester polylactic acid (PLA). It is a thermoplastic derived from renewable, organic sources such as corn starch or sugar cane. Although PLA offers a number of advantages such as high strength and high modulus, excellent optical properties, moisture resistance and biocompatibility, this is a quite fragile material. Other disadvantages are poor impact strength and low elongation. One way to improve the unsuitable PLA mechanical properties is to modify the material with additives like plasticizers, fillers etc. In this research, attention is focused on modification of PLA by reactive extrusion technology. Obtained materials were tested by DSC to evaluate changes in transition temperatures of PLA (Tg, Tm) and mechanical properties were tested too. The significant changes in mechanical properties were noticed.
SHOCK-WAVE SYNTHESES OF HIGH ENTROPY ALLOYS IN Fe-W-Al-Ti-Ni-B-C SYSTEM
Authors: Chikhradze Nikoloz , Jalabadze Nikoloz , Chikhradze Mikheil , Tsverava Davit , Janikashvili George
Published: October 2023

High-Entropy Alloys (HEAs) have higher mixing entropy than the conventional alloys and intermetallic compounds and form the stabile solid solutions with disordered structure. They exhibit unique and special properties, in particular high hardness, wearresistance, significantly high strength, structural stability, good corrosion, and oxidation-resistance. HEAs �exotic�, core effects are followings: high configurational entropy; sluggish diffusion; lattice distortion and cocktail effect. At the current stage, the volume of investigations towards high entropy materials extended from single-phase solid solution structure to multi-phase structures, containing solid solution phases, intermetallic compounds, oxides, borides etc. Promised direction in this field are the high-entropy composites, prepared based on the HEAs matrix- reinforced with hard ceramic compounds. Accordingly, there is a huge potential to find new properties in the field of multi-component high-entropy nanostructure materials. The Fe-W-Al-Ti-Ni�BC composition considered in article for fabrication of HEA�s. The content of elements in blend were determined on the base of phase diagrams available in scientific databases. The planetary ball mill is used for Mechanical Alloying (MA) and nanopowder production. Industrial explosives are used for shock wave generation and consolidation of the blend. The MA blend charged in low carbon cylindrical steel tube container and closed both sides. A cardboard box with blend container was filled with explosives and detonated. The phase analyses and structure-property of obtained bulks HEA compacts investigated. Results of investigations discussed and presented in the paper.
TWO-PHOTON PULSED TERAHERTZ EMISSION FROM GaAs/AlAs DOUBLE-BARRIER RESONANT TUNNELING DIODE BIASED INTO CURRENT SELF-OSCILLATION REGIME
Authors: Rasulova G.K.
Published: October 2023

Two-photon pulsed terahertz (THz) emission from a GaAs/AlAs double-barrier resonant tunneling diode biased into regime of self-oscillations of current has been detected. The two THz pulses are triggered at two critical points in period of current self-oscillations due to the periodic process of charge accumulation and drain in quantum well. The internal mechanism of relaxation self-oscillations, which controls the trapping and release time of electrons tunneling through the miniband, is responsible for the time delay between THz pulses and the emission energy of two photons.
EVALUATION OF SOME GLUTEN-FREE GRAINS BASED NUTRITIONAL PROFILE
Authors: Pirvulescu Luminita , Bordean Despina-Maria , Borozan Aurica-Breica , Baghina Narcis Gheorghe , Moigradean Diana
Published: October 2023

The technology for producing gluten-free products based on grains flour continues to improve, which appreciably increases the nutritional importance of these products and expands the assortment of inexpensive gluten-free food products of domestic production.
The aim of the addressed topic was to characterize the mineral composition and total antioxidant capacity of millet, flax and buckwheat flours and to identify some potential characteristics to help create healthier products with specific fingerprints. The case study regarding millet, flax and buckwheat flours was carried out in the Food Analysis Laboratory within ULST.
All three are gluten-free flours that can be used as an alternative to wheat flour for people which choose to eat gluten free products or have celiac disease or gluten intolerance.
To carry out the study were performed minerals content analysis using XRF Hitachi XMET8000 Analyzer and total antioxidant capacity using CUPRAC method. The obtained results were compared with those presented in different scientific articles and databases (USDA, FoodB). The statistical evaluation of data was done using PAST and MVSP. The data corresponding to the mineral content proves that millet flour has a mineral composition relatively similar to flax flour, but less similar to buckwheat flour. The Principal Component Analysis shows that flax and buckwheat flours cannot replace millet flour. The mineral analysis of different gluten free flours can help create food products with variable mineral content based on the need of different consumers.
RESEARCH ON THE PHOTOSYNTHESIS RATE IN THE SPECIES ECHINACEA PURUPUREA CULTIVATED IN VITRO AND IN VIVO CONDITIONS
Authors: CAMEN Dorin Dumitru , DUMITRASCU Madalina Elena , SARAC Ioan , MOATAR Maria Mihaela , DRAGOMIR Petru Ioan
Published: October 2023

Echinacea purpurea is a herbaceous plant that is 80-150 cm tall. [1] The roots of the plant penetrate deep into the soil, they have fibrous ramifications, the rhizome is short. Its leaves are wide, lanceolate or elliptic-oblong, and the flowers are conical, have a violet color. Echinacea species are native to North America and in Europe they are cultivated as medicinal or ornamental plants. [17] The research focused on determining the photosynthetic rate in this species, using variants cultivated both in vivo and in vitro. The evaluation was carried out over a period of 49 days. For the variant cultured in vitro, we used the MS culture medium. The experimental results show significant differences between the experimental variants. Also, the processing of the results allowed us to establish the optimal technologies regarding the rate of photosynthesis both in the species cultivated in vitro and in vivo.
THE INFLUENCE OF GROWING CONDITIONS AND CLIMATE VARIABILITY ON THE SWEET CHERRY AND FRUIT QUALITY
Authors: Scedei Daniela Nicoleta , Mihut Casiana Doina , Dobrei Alina Georgeta , Nistor Eleonora , Okros Adalbert
Published: October 2023

The aim of this research was to establish the influence of physico-chemical (biometric) characteristics and climate changes in different cultivation areas on three sweet cherry varieties: Van, Stella and Rubin, on the perception of food (fruit) quality. Several parameters (size, weight, soluble solids content, sugars, pH, firmness, dry matter) were measured and statistically processed using analysis of variants[15]. The results showed that the Van cultivar produced heavier fruits and the large diameter was above the average of the other two cultivars. In turn, the Rubin variety showed a higher sugar concentration than the other two varieties, as well as a higher pH, dry matter and soluble solids, while the Stella cherries stood out for their higher firmness. The results suggested that quality does not always depend on and/or recognize these quality parameters related to the morphological-chemical properties of each variety, but can be influenced by climatic conditions.
ADVANCED MATERIALS FOR THE PROTECTION AND REPAIR OF CONCRETE STRUCTURES � EXPERIMENTAL ASSESSMENT
Authors: Pavlik Zbysek , Pivak Adam , Pavlikova Milena
Published: October 2023

The development and testing of advanced materials for the protection and repair of concrete structures is the main objective of the presented research. Two types of synthetic resins have been developed, applied to concrete samples and their effectiveness in improving the durability of the samples investigated has been tested. Type A is an epoxy resin with non-reactive solvents, originally designed for thin-layer surface treatment to achieve a highly closed and cross-linked surface. Type 50 is a modified low-viscosity epoxy resin of BFA (Bisphenol A) type with the content of reactive and non-reactive solvents. It is intended for impregnation of damaged concrete. Resin A was applied to reference concrete of higher strength class (CN). Type 50 was used for deep impregnation of artificially prepared �damaged� concrete (CD) samples. The experimental analysis investigated the effect of the chemical agents used on the structural, mechanical, hygric, and durability parameters of the treated concrete specimens. The use of type A epoxy resin reduced porosity, improved freeze resistance, reduced water ingress and water absorption, while maintaining adequate water vapor permeability of reference concrete CN. Similar functionality was observed for resin type 50, which also significantly improved the compressive strength of damaged concrete (CD) samples. In this case, the compressive strength improvement was approximately 51.4% and the freeze-thaw resistance coefficient after 100 freeze-thaw cycles was 102%. Considering the fact that the control CD samples were completely cracked by frost action, the improvement in the properties of damaged concrete by Type 50 epoxy resin was quite substantial and promising for full-scale application on construction sites.
SELF-LEVELING SCREED PROPERTIES OPTIMIZATION FOR HORIZONTAL CONCRETE SURFACES RESTORATION USING D-OPTIMAL DESIGN
Authors: RUSU Ion , JUDELE Loredana , LEPADATU Daniel
Published: October 2023

The paper contains the results of experimental research on the elaboration of the composition and optimization of the properties of the self-levelling screed based on cement and sand, intended for the fulfilment of the intermediate layer of floors, including industrial enterprises with the aggressive environment; sedentary parts of tanks, basins; bunkers; different containers, etc.
The reinforced self-levelling screed has an absolutely horizontal surface. It allows the application of finished layers of composite polymer materials with a uniform thickness, and the finished layers of floor materials in rolls or shunt pieces to be absolutely smooth.
To carry out the experimental testing the design of experiments method was used, which is the most advanced instrument of planning, realization, analysis and optimization existing in the scientific field that requires experimental testing, which is capable of correctly choosing the experimental design to provide the user with mathematical properties of the matrix used to define it. The experiments was carried out according to the D-Optimal design with 5 factors, which allowed the optimization of the composition of the complex addition, which includes the addition of plasticizer, clogged up, biocide and reinforcing accelerator, which in particular relation to the water content allows to ensure the self-levelling of the screed during its application, increased density, short grip time and increased chemical and biological resistance. With this method, we can also obtain the influence of each parameter studied on the properties of the selflevelling screed in order to eliminate the least influential from the regression equation.
SURVEY OF DISPERSION AREAS IN SMALL TOWNS
Authors: Kramarova Zuzana
Published: October 2023

Dispersion areas are one of the essential elements determining the convenient coming and departure of buildings with a large number of users. However, in the legislation and normative base of the Czech Republic, they are a neglected element without clearly defined parameters. Although the legislation defines the term "dispersion area", it does not further specify it. Here again, the different environment of large and small cities in the Czech Republic is reflected. Individual large towns or cities, for example, Prague, Brno, Pilsen, and others, have developed methodologies for designing public spaces for their administrative territories. Dispersion areas can be included in these methodologies. Small towns do not have such regulations and are therefore dependent only on valid legislation, which is insufficient in this area. The university research project 02SVV22 entitled "Categorization and dimensional requirements of dispersion areas in the context of the type of buildings" was concerned with ascertaining the state of dispersion areas in front of selected types of buildings in nine small towns in the Czech Republic. The contribution reports on the course of local surveys and their results.
VOC OCCURRENCE IN THE PRIMARY SCHOOLS � CASE STUDY
Authors: Kraus Michal , Senitkova Ingrid Juhasova
Published: October 2023

A healthy indoor environment is becoming an increasingly important issue. As the use of various materials in inhabited interiors increases, so does the concentration of harmful volatile organic compounds (VOCs) in these spaces. The actual trend of reducing energy consumption in buildings, such as by using perfectly sealing windows and doors, contributes to this increase. Consequently, people moving around in these interiors experience a rise in health problems due to the elevated concentrations of VOCs. This study aimed to assess the indoor air quality (IAQ) in naturally ventilated primary schools located in the southern Czech region. Two classrooms were selected from each primary school based on similar characteristics, such as building construction, volume, windows structure, area of windows, number of occupants, activities, type of furniture, and internal covering including flooring, wall, and ceiling. The classrooms were continuously occupied during school hours for a total of 25-35 hours per week and unoccupied during afternoons and weekends. The study focused on measuring the concentrations of volatile organic compounds (VOCs) in the classrooms, as well as assessing their impact on health. The study highlights the importance of monitoring IAQ in naturally ventilated primary schools and can be useful for policymakers and school administrators in developing strategies to improve IAQ and promote the health and well-being of students and staff.
FALA TU! – O USO DO INSTAGRAM COMO ESTRATÉGIA DIDÁTICA PARA ENTENDER AS VISÕES DA CIÊNCIA-QUÍMICA E DO EU-CIENTISTA DE ESTUDANTES DO 9º ANO DO FUNDAMENTAL II E DO ENSINO MÉDIO
Authors: Moura Maria Eduarda Tavares de
Published: October 2023

O presente artigo discute a utilização do Instagram enquanto TDIC como estratégia para entender as visões do Ser-Eu-Cientista de estudantes do Ensino Médio, evidenciando tais visões identificadas e as estratégias adotadas para a superação das mesmas. Para tal, a autora se apoia em referências expressivas da literatura sobre a temática e em sua experiência na aplicação da intervenção durante a disciplina de Estágio Obrigatório. Fica claro que a intervenção proposta identificou bem as visões dos estudantes e buscou desmistificar tais concepções buscando a construção de uma figura mais humanística do cientista.
A LUDICIDADE COMO ESTRATÉGIA DE INCLUSÃO DE CRIANÇAS NO ESPECTRO AUTISTA NAS AULAS DE CIÊNCIAS DA EDUCAÇÃO BÁSICA: UMA REVISÃO SISTEMÁTICA
Authors: Moura Maria Eduarda Tavares de
Published: October 2023

O transtorno do espectro autista (TEA) ou autismo é considerado um distúrbio do desenvolvimento neurológico de aparecimento precoce (desde a infância), caracterizado por dificuldades de aprendizagem, déficits nas habilidades sociocomunicativas e de comportamentos estereotipados. Considerando as especificidades do aluno autista, a introdução do ensino de Ciências em sua formação tende a trazer importantes contribuições para o seu desenvolvimento, uma vez que a educação científica tem grande potencial para a promoção das habilidades de uma criança. Com isso surge a seguinte problemática: como a ludicidade pode contribuir no processo de ensino e aprendizagem de crianças no espectro autista nas aulas de ciências na Educação Básica? Diante disso, o objetivo deste trabalho é, através de uma revisão da literatura, identificar os principais benefícios associados à inclusão da ludicidade nas aulas de ciências na Educação Básica para alunos no espectro autista. Para responder ao problema de pesquisa e alcançar o objetivo proposto, o presente trabalho lançou mão de uma discussão descritiva qualitativa. Após a busca manual, foram selecionados cinco artigos para compor esta revisão. A partir da proposta de pesquisa desenvolvida neste trabalho de conclusão, espera-se ter contribuído tanto para o ensino de Ciências, em geral, como para as pesquisas da área de ensino de Ciências e inclusão de crianças no espectro na Educação Básica.
Resource Status of Wild Hawthorn in Xinjiang and Research Progress of Genetic Diversity in Hawthorn
Authors: Ma Chao , Meng Lingli , Liu Lingxiao , Li Yaoyao , Liu Yunguo
Published: October 2023

Wild hawthorn is a rare wild plant resource endemic to the western Tianshan Mountain in Xinjiang, containing three species: Crataegus songorica, C. alorocarpa and C. sanguirnta. However, the area of wild hawthorn forest has shrunken under the disturbance of human activities, genetic diversity has also suffered serious damage. Therefore, it is urgent to carry out the present status investigation of genetic diversity and assess the genetic differentiation of geographic populations of wild hawthorns. This paper summarizes the resource status of wild hawthorn in Xinjiang and research progress of genetic diversity in hawthorn, and developed an approach to screen molecular markers of single nucleotide polymorphism (SNP) and simple sequence repeat (SSR) using Restriction-site Associated DNA sequencing (RAD-seq). SNP and SSR markers will be used to assess genetic diversity, genetic differentiations and genetic relationships of different populations of wild hawthorns.
Drewniana architektura sakralna powiatugliwickiego – przegląd, zagrożeniai drogi ochrony
Authors: Serdyńska Joanna
Published: October 2023

Przedmiotem artykułu są drewnianekościoły powiatu gliwickiego. Rozwijającesię od czasów średniowiecznych budownictwodrewniane ukształtowało zasadniczyschemat kompozycyjno-przestrzenny tychbudowli, który przesądził o ich typologicznejodrębności, walorach estetycznych orazcechach regionalnych i ponadregionalnych.Praca stanowi studium bazujące na analiziemateriałów źródłowych oraz obserwacjachprzeprowadzonych na miejscu. Jej celem jestcharakterystyka, opis kondycji oraz wskazanienajważniejszych zagrożeń oraz dróg ochronytych bezcennych obiektów. Zdaniem autorkichronić należy nie tylko same budynki, alerównież wiedzę i umiejętności budowlaneoraz sam przemysł drzewny.
Evaluasi Nilai Faktor Performa Struktur Modular Komposit dengan Dinding Internal Pelat Baja Bergelombang
Authors: Kusumaningrum Patria , Nanda Pramudya Tri
Published: October 2023

Abstrak
Struktur modular merupakan struktur yang terdiri dari modul-modul penyusun yang diprefabrikasi di pabrik dan dirakit di lokasi konstruksi secara efektif dapat mengurangi durasi konstruksi, meningkatkan kualitas pengerjaan dan optimasi sumber daya. Penggunaan struktur modular komposit dapat menjadi solusi dari keterbatasan terhadap struktur modular baja dan struktur modular beton. Tetapi pemanfaatan struktur modular masih terbatas karena belum tercantum di dalam peraturan desain nasional, dan kurangnya pengetahuan akan karakteristik dan respon struktur modular terhadap beban gempa. Dua konfigurasi  struktur modular komposit yaitu struktur modular komposit open frame dan struktur modular komposit infilled wall dikaji dalam penelitian ini. Studi ini bertujuan untuk mengevaluasi perilaku seismik konfigurasi struktur modular komposit yang telah disebutkan di atas. Faktor performa struktur (daktilitas, faktor kuat lebih, dan faktor modifikasi respon), parameter kinerja seismik struktur dan pola keruntuhan berdasarkan hirarki pembentukan sendi plastis dengan analisis nonlinear statik pushover dikaji dalam penelitian ini untuk meninjau respon struktur secara global.
Kata-kata Kunci: Struktur modular komposit, open frame, infilled wall, analisis nonlinear statik pushover, kurva kapasitas, faktor performa, daktilitas, kuat lebih, faktor modifikasi respons, kinerja seismik dan pola keruntuhan.
Abstract
Modular structure is a structure comprising of prefabricated modules manufactured in the factory and assembled on the construction site which can be effectively reducing construction duration, improving workmanship quality and optimizing resources. Composite modular structure may be one of solution to eliminate limitation arise from steel modular and concrete modular structures However, the use of modular structures is limited because no design codes are available, and the lack of knowledge of the characteristics and response of modular structures subjected to earthquake. Two configurations of the composite modular structure, namely the open frame and the infilled wall composite modular structures are studied. This study aims to evaluate the seismic behavior of the above-mentioned composite modular structure configurations. Structural performance factors (ductility, overstrength factor, and response modification factor), structural seismic performance parameters and failure patterns based on the plastic hinge formation hierarchy with nonlinear static pushover analysis were studied in this study to review the structural response globally.
Keywords: Composite modular structure, ppen frame, infilled wall, nonlinear static pushover analysis, capacity curve, performance factor, hinge failure pattern.
Green Supply Chain Management Practices and Marketing Effectiveness of Pharmaceutical Firms in Port Harcourt
Authors: Akani Godspower Henshaw Nyeche , Eruchi Precious , Organum Worgu Prosper , Kattey Godwin Paul
Published: October 2023

This study investigated the relationship between green supply chain management practices and marketing effectiveness pharmaceutical firms in Port Harcourt. The objectives of the study were to ascertain the extent to which supply chain management practices relate marketing effectiveness pharmaceutical firms in Port Harcourt. The population of the study was Two hundred and seventeen (217) registered pharmacies in Port Harcourt, listed in the yellow page of Nigerian Stock Exchange Facts Book of (2014). The primary data were collected with a structured questionnaire that was designed in a 5 point Likert scale of very low extent to very high extent. Results of the test showed that supply chain management practices have significant and positive relationships with marketing effectiveness (brand awareness and corporate image) – the measures of marketing effectiveness. the Pearson Product Moment Correlation was the test statistics. The study therefore, concluded that supply chain management practices relate with marketing effectiveness pharmaceutical firms in Port Harcourt. Therefore, the study recommended management of pharmaceutical in Port Harcourt should implement adequate green supply chain practices such as green procurement and green manufacturing to enhance their marketing effectiveness. All statistical analysis was conducted using SPSS 2.0.
Strategic Leadership in Enhancing Organizational Performance within the Nigerian Banking Sector: A Theoretical Dimension
Authors: Bayo P.L. , Onyenma O.U. , Uhuru G.P.
Published: October 2023

The essence of establishing a business is to provide quality service to its customers, which is achievable through leadership. The objective of this paper is to conceptually examine the impact of strategic leadership tools for enhancing organisational performance in Nigerian deposit money banks. The predictor variable of strategic leadership was viewed from the dimensions of strategic intention and strategic management, while the criterion variable of organisational performance was measured by improved customer service and profitability. The paper reviewed the existing literature on the study variables conceptually and empirically. From the conceptual and empirical review, it was found that strategic leaders are persons with the right vision, mission, and objectives to cause change in an organisation, that leaders with strategic intents are capable of leading an organisation out of a challenging period, and that the components of strategic leadership, which are strategic intention and management, have a positive synergistic effect on the operational efficiency of the organizations. Clear corporate objectives, business, and functional-level strategies are typical of financial institutions that have a vision and mission that are broadly shared throughout the organisation and are reflected in the activities of the financial institution, as well as elaborate processes of strategy formulation that will involve all employees in the organisation and result in long-term strategies. These components of strategic leadership will enhance bank performance indicators as reflected in earnings, return on assets, profitability, and improved customer service as they increase to a greater degree.
Prospects for the formation of investment support for the technological growth of the agricultural sector of the Ukrainian economy in the post-war period
Authors: Sahachko Yuliia , Smihunova Olena , Podolska Olha
Published: October 2023

During the war and after its end, Ukraine needs to restore its economy, in particular the agri-food sector, which is one of the key sectors of the national economy. Investment support for the technological growth of the agro-food sector can be of decisive importance for this, because it allows to achieve high productivity, competitiveness and sustainable development of this industry, which in turn will contribute to ensuring the food security of the country, raising the standard of living of the population and reducing the outflow of labor force abroad. The purpose of the article was to analyze and determine promising ways of attracting investments to support the technological development of the agro-food sector in post-war Ukraine. Using the analysis of literary sources and statistical data, the state of the agricultural sector of Ukraine in the pre-war and post-war periods is considered and analyzed. The structure and investment attractiveness of Ukrainian enterprises are investigated. The state of business subjects in the field of agriculture was analyzed and with the help of expert assessments, it was established that small entrepreneurship is the driving force of the development of the economy and economic relations, although it is risky for investment. Using statistical analysis, the structure of foreign investment is investigated and it is established that the main problem of attracting foreign investment is outdated equipment and technologies, so it is necessary to integrate innovations into agriculture. So, after analyzing the strengths and weaknesses, opportunities and threats, it was established that appropriate financing can help implement modern resource-saving technologies in agro-food production, promote the implementation of innovative approaches, namely the introduction of modern methods of soil treatment, the use of rational water use, the introduction of automation and mechanization of production processes, the use of drones and modern monitoring systems, as well as the introduction of modern methods of storage, processing and sales of products, which will ensure increased production efficiency, reduced environmental consequences and increased competitiveness of Ukrainian agricultural enterprises on the international market. The practical value of the research lies in the ability to provide recommendations on creating a favorable investment climate, improving legislation, ensuring the protection of investors' rights, as well as infrastructure development and support for research projects in the field of agro-food production