bluuebunny/crossref_metadata_2025 huggingface dataset:
Relacije između motoričkih sposobnosti i morfoloških karakteristika kao predispozicije učenika za bavljenje sportom
Authors: Sinđelić Nenad , Branković Dragan , Pelemiš Vladan
Published: July 2023

The aim of this paper is to look at the relationship between morphological characteristics and motor abilities as a predisposition of students to play sports. On a sample of 58 students aged 9 (±0.5), a set of two variables was applied to define the morphological space (body height and body mass), and a set of three variables to assess the motor space of explosive power and motor speed (standing long jump, shuttle running 10 x 5 m, and hand tapping). The explanation of individual differences (variability) on the criterion variable based on a linear combination of a set of predictor variables was performed using a multiple linear regression. It has been established that better results on the long jump motor test are achieved by those students who achieved better results on the 10 x 5 m shuttle running test and who have a lower body mass. In addition, it can be concluded that better results in the motor test of shuttle running 10 x 5 m are achieved by those students who have a lower body mass and better results on the standing long jump and hand tapping tests. When it comes to the results in the hand tapping motor test, it can be stated that students who have a lower body height and a better/ faster result in the shuttle running 10 x 5 m will achieve better results. Accordingly, in physical and health education classes, special attention should be paid to the development of explosive strength and motor speed as particularly important motor abilities in the identification and selection of children and young people for sports.
Digital literacy of teachers for using electronic textbooks in the teaching class of nature and society
Authors: Milenović Hadži , Vasilijević Danijela , Botić Mladen
Published: July 2023

The goal of this study is identification of teachers assessment about digital literacy the have for using electronic textbooks in the teaching class of Nature and society. In this research, we work from general assumption that electronic textbooks are important in teaching Nature and society, but not all teachers are equally digitally competent for using electronic textbooks, then also effects of their usage in Nature and society are different. It also deals with special assumptions that in the research will reveal that there are differences in teachers assessments of the digital competence they have for usage of electronic in Nature and society depending on their years in service in school, their educational level and the ways they improve their knowledge. Research has been conducted in the first half of 2022/2023. school year, in the area of Zlatibor district. Data collected by Scalar - DCT-UeTCNS ( = .924) and processed with descriptive statistics, analysis of variance and Man-Vitney U test have shown there is statistically significant difference in the estimates of teacher about their digital competences they have for using electronic textbooks the class of Nature and society in depends of their years in service in school, their educational level and the ways they improve their knowledge. The research results point to the need of the efficient implementation of electronic textbooks in the class of Nature and society, improving digital competences of students in elementary school on all levels of teaching and the need of continual professional development of teachers, especially in the field of improving digital competences directed on creative usage of electronic textbooks in teaching practice.
Examining the effectiveness of systematic education applied in Turkish lesson
Authors: Ok Mustafa
Published: July 2023

The aim of this research is to examine the effect of systematic education on the teaching of the text called "The Story of a Book", which is expressed within the scope of the "Our Values" theme in the 4th grade Turkish lesson. The model of the research is mixed method in which pre-test, post-test single-group quasi-experimental design and interview form are used together. The study group of the research consisted of 21 students in Konya province. The study was carried out in the experimental group of 21 people for 6 lesson hours according to the systematic education. "Turkish Achievement Test" and an interview form developed by the researcher were used as data collection tools. The test was applied to the experimental group as a pre-test before the program prepared according to the systematic education was applied, and as a post-test after it was applied. After 4 weeks, it was given to the experimental group again as a permanence test. In the analysis of the data, t test, mean and standard deviation were used. As a result of the study, it was observed that there was a significant difference between achievements in knowledge, practice and total score levels in the systematic education group. However, it was determined that there was no statistically significant difference between their achievements at the level of comprehension. Based on these data, it can be said that systematic education is significantly effective in increasing the students' level of knowledge, practice and total achievement and permanence of the cognitive domain. According to the results of the interview form, it was concluded that the students had a lot of fun in the lessons and they were happy to continue the lessons in this way.
The influence of voice and speech disorders on the quality of life of school-age children
Authors: Ilić-Savić Ivana , Petrović-Lazić Mirjana
Published: July 2023

Quality of life is a construction used to measure an individual's perspective on their well-being. In modern research, voice and speech disorders have been recognized as indicators of impaired quality of life in children. The aim of this research is to analyze the characteristics of quality of life in children with voice and speech disorders and children of typical development of younger school age. The research assessed the social, emotional and functional aspects of children's quality of life. The research is anonymous, done on a sample of parents of children of younger school age. The examined sample included 100 parents of children of I (53%) and II (47%) grades of primary school. Respondents were divided into two groups, the experimental group (children who go to a speech therapist due to voice and speech pathology (M = 1.55, SD = 0.44)) and the control group (children of typical development (M = 0.57, SD = 0.47)). The Pediatric Voice Handicap Index - pVHI was used to assess the quality of life in children. One-factor multivariate ANOVA was used in statistical data processing. The results of this study show that children with voice and speech disorders have impaired quality of life compared to children of typical development (p <0.05). The social and functional use of speech is worse in children with voice and speech disorders, and the emotional discomfort associated with voice and speech in these children far exceeds the emotional discomfort in children of typical development. As we stated in our work, many studies have shown that voice and speech disorders impair the physical and mental health of children. Due to all the above, the assessment of the quality of life in children with voice and speech disorders is especially important for psychologists and speech therapists during adolescence, so that they can identify problems in a timely manner and take the necessary support measures.
Student perceptions of values and limitations of distance teaching during the pandemic of COVID-19
Authors: Popović Kristijan , Glišić Tanja , Jorgić Draženko
Published: July 2023

In previous years, the corona virus pandemic had a significant impact on institutional education at all levels, which is why there is noticeable interest from the wider academic community, which is intensively engaged in the study of distance learning. The focus of this paper is students' perceptions of the values and limitations of online classes during the corona virus pandemic. The sample in this empirical research consisted of students of the Faculty of Philosophy of the University of Banja Luka (N=151). An "online" survey was conducted in two stages, the first in mid-2020, and the second in mid-2021. The results of the research show that students recognize the advantages of online learning in terms of its economy and availability of teaching materials, they also notice the obstacles of this kind of teaching in terms of a lower level of interactivity, technical obstacles and overloaded requirements. By pointing out the manifested values and limitations of online teaching, the paper highlights certain recommendations for its improvement and elimination of shortcomings.
Montessori practices in early childhood education with teachers' experiences
Authors: Atis-Akyol Nevra , Uludag Gonca , Tosun Birgul
Published: July 2023

The study was conducted using a qualitative research method to examine Montessori preschool education practices in Turkiye. The study group consisted of 14 teachers in Montessori classrooms of preschools in the central district of a province in Turkiye. The data were collected with a Structured Classroom Observation Form, Material Control List and Semi-structured interviews. The MAXQDA 2022 software was used for the analysis of teacher interviews. According to the findings, the structure of the Montessori classrooms was generally in accordance with the Montessori philosophy, and there was a sufficient number and variety of Montessori materials in the classrooms. Practical life and mathematics activities were frequently included in the program. The most commonly used materials were sensorial and cosmic field materials. Teachers felt inadequate about Montessori practices. There were problems with the high-class size, mixed age, cost and supply of material. According to teachers, education provides children with self-regulation skills and enables effective learning. In addition, education has some advantages for parents and teachers. Children were bored with the activities, parents had insufficient knowledge of the practices, and teachers had time management problems. Finally, teachers offered recommendations for improving practices.
Is moral identity effective in the relationship between self-efficacy and psychological problems?
Authors: Okan Nesrullah
Published: July 2023

The primary purpose of this study is to design a model that examines the mediating role of moral identity in the effect of self-efficacy on stress, depression, and anxiety. For this purpose, the researcher applied three scales to 366 students enrolled in state universities on the Anatolian side of Istanbul. The data analysis used parametric tests, correlation tests, structural equation models, and Bayesian reliability analyses. Based on the results from the structural equation modeling analysis, the variable of moral identity was found to have a significant effect on the positive impact to self efficacy on psychological problems. Therefore moral identity has been concluded to be able to help reduce the effects of stress, depression, and anxiety.
Fast patrol boat hull design concepts on hydrodynamic performances and survivability evaluation
Authors: Pratama Angga , Prabowo Aditya , Tuswan Tuswan , Adiputra Ristiyanto , Muhayat Nurul , Cao Bo , Hadi Syamsul , Yaningsih Indri
Published: July 2023

A fast patrol boat is one of the ships intended to defend a region and rescue and search in the accident event so that the ship must have a high level of security and survivability performances. This study uses 9 design variations with various main dimensions and hull lengths to determine the effect of the different main dimensions on the hydrodynamic performances. Each criterion was affected to obtain results in hull design, durability, stability, seakeeping, floodable length, and motion sickness incidence (MSI). Simulations are carried out to determine the resistance, stability, ship response when exposed to external forces, passenger comfort, and ship safety level when a leak occurs. Resistance simulation uses a Froude number between 0 to 2.217. Stability simulation analyzes max GZ and angle of maximum GZ on seakeeping, deck wetness, and MSI simulations using 90°, 135°, and 180° wave incidence angles. The addition of bulkheads is carried out to determine the ship's response when it experiences a leak and prevents the ship's sinking when puddles enter the ship with five bulkheads per hull and three variations in distance. Design and simulation of various criteria using Maxsurf software. In the floodable length simulation, the hull added a bulkhead to determine the effect of leakage from several hull designs and watertight bulkhead spacing variations. Design 7 has the best average result compared to other designs from the simulation recapitulation results. It has a small resistance value, a large stability angle, a stable ship response when subjected to external forces, seasickness levels, and a small deck language. From the floodable length graph, it has a high flood limit that makes the ship survive and be safer than other designs. Design 7 refers to the ship Grandweld Shipyard Delivers 21M Discovery Class Vessel Fujairah Pilot.
Assessment of friction stir welding joints of AA2017-T4 aluminum by disc pressure mechanical tests
Authors: Djili Abderrahmane , Bezzazi Boudjema , Habouss Mohamed , Zioui Nadjet
Published: July 2023

Precipitation hardening aluminium alloy sheets AA2017-T4 are welded by FSW on a conventional FSW tool. A macrograph of the cross section of the butt-welded joint shows the classical zones for such welding, namely the nugget zone, the thermo-mechanically affected zone and the heat affected zone. Scanning Electron Microscopy displays a grain refining and a re-formation of the precipitates in the nugget zone. Micro-hardness measurements on the cross-section perpendicular to the welding direction give the standard W-profile of the hardness for such welding, with as expected, the relatively highest value at the joint center (nugget zone). To assess the mechanical performance of the FSW welded joint, the Disk Pressure Test (DPT) is used. It shows a failure pressure for the welded specimen that is 17% lower than the base material. The fracture surface micrographs clearly show a thickness reduction at break that is ~36% higher for the base material than the welding joint and a ductile fracture mode for both specimens.
Analysis of tensile and flexural strength of HDPE material joints in ship construction
Authors: Wibawa Putu , Razzaqi Akbar , Abdullah Kharis , Wulandari Kiki , Sumardiono S , Restu Eriek , Gafur Abdul
Published: July 2023

The use of wood as the primary material in the fishing vessels construction has been use a lot in Indonesia. At present, there is a problem in the availability of wood materials which are increasingly difficult to obtain. For this reason, it is necessary to innovate good quality wood substitute materials. In this case, HDPE (High-Density Polyethylene) material is the suitable alternative as a substitute for the primary material for fishing vessels. However, further studies are needed due to the lack of regulation and research related to the joint of HDPE materials in ships construction. This study aims to determine the quality of various variations in tensile and bending strength. The method used is experimentation and data processing, while the research variation is V-Seam and X-Seam with hot gas and extrusion welding. Data were obtained by conducting tensile testing with the BS EN 12814-1-2000 standard and bending testing with the BS EN 12814-2-2000 standard. The study's results found that the seam and connection method affect the tensile strength and bending of the HDPE welding joint. The tensile and bending strengths for each variation of V-Seam hot gas, X-Seam hot gas and V-Seam extrusion welding are 14.07 MPa, 15.44 MPa, and 19.29 MPa, while the bending strengths are 29.22 MPa, 33.28 MPa, and 37.85 MPa, so the most optimum tensile and bending strength is obtained from the variation of the V-Seam extrusion welding joint with values of 19.29 MPa and 37.85 MPa, respectively.
Electronic structure and aromaticity of [12]infinitene: A DFT study
Authors: Đorđević Slađana , Ćoćić Dušan , Al-Yassiri Muntadar , Radenković Slavko , Puchta Ralph
Published: July 2023

The electronic structure and aromaticity of the [12]infinitene molecule (1) and its formation via the Mallory reaction were studied using density functional theory (DFT). The examined reaction is based on a stepwise cyclization process. The nucleus-independent chemical shifts (NICS) were used to assess the aromatic character of the chemical species involved in the examined reactions. In addition, NICS-Scan, 2D and 3D multidimensional off-nucleus siso(r) magnetic shielding scans were also employed to examine the aromaticity of 1. It was found that the formation of 1 is an endothermal process, as a result of the opposed stabilizing effects of aromaticity and destabilizing effects of planarity distortions found in molecules included in the considered reaction.
Extraction of selected minerals from Melissa officinalis L. leaves by using two-level factorial design
Authors: Mitić Jelena , Mitić Milan
Published: July 2023

In this study, a two-level factorial design was used to evaluate the significant extraction parameters in achieving higher recovery yield of Cu, Fe, Mn, and Zn contents from Melissa officinalis leaves. The independent parameters were solid-to-solvent ratio, extraction temperature, and duration of extraction. The experimental data obtained were fitted to a first-order polynomial equation using multiple regression analysis and studied by appropriate statistical methods (ANOVA). The optimum extraction conditions were as follows: solid-to-solvent ratio 1:15 g/mL, extraction temperature 100°C, and extraction time 80 min. Under these conditions, the experimental concentrations were in close agreement with the value predicted by the model. The correlation coefficients of 0.9947, 0.9966, 0.9939, and 0.9957 observed between the predicted and actual values for the response variables are evidence that the regression model can represent the experimental data well. Minerals present in the extracts may be maximized when process conditions are carefully adjusted within the reported values.
Green synthesis of SeNPs using Sonchus maritimus based nanosized metal oxides for in vitro biological applications and in vivo acute toxicity evaluation
Authors: Chetehouna Sara , Derouiche Samir , Réggami Yassine
Published: July 2023

This investigation aimed to characterize the green synthesized selenium nanoparticles using Sonchus maritimus L. extract and evaluate their antioxidant and antibacterial properties. Moreover, acute toxicity of nanoparticles was performed in Wistar rats. The synthesis of SeNPs was confirmed by Ultraviolet-visible, Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Energy Dispersive X-ray analysis. Antioxidant activities of S. maritimus and SmE-SeNPs were determined by DPPH and FRAP assays. Antibacterial activities were tested against Gram positive and negative pathogen bacteria. The SEM results showed that SeNPs had a spherule-like structure reaching up to 26.48 nm. In addition, S. maritimus and SmE-SeNPs had DPPH scavenging activity and reducing power. SeNPs exhibited activities against Escherichia coli and Staphylococcus aureus. The intraperitoneal toxicity test of SeNPs showed no mortality and minor behavioral variations. In conclusion, S. maritimus can be considered as biocatalyst stabilizers for the biosynthesis of SeNPs which might be used in several applications due to their biological efficiency.
Expression of proapoptotic-antiapoptotic genes in malignant, borderline and benign ovarian tumors
Authors: Perić Anđela , Mirić Ana , Košarić Jelena , Milivojević Nevena , Živanović Marko , Ćićarić Neda , Arsenijević Petar
Published: July 2023

There is a wide group of ovarian tumors, malignant as well as benign. Histopathological examination is used as a primary source of identifying the difference between malignant and benign processes. We analyzed ovarian tissue samples of twelve women, ages ranging from 21 to 77. Samples of 8 benign, 1 borderline, and 3 malignant ovarian tumors were included in the study. Using the quantitative PCR method, genes indicating apoptotic processes in tissue cells were evaluated, based on monitoring their relative expression. Relative gene expression was monitored for anti-apoptotic protein Bcl-2, pro-apoptotic protein Bax, and effector protein Cas3. Expression of gene for protein Bax and Bcl-2 is increased and Bax predominates, which indicates that the initiation of apoptosis has begun, mostly in benign tumors. Bcl-2 was elevated in samples of borderline and malignant tumors while Bax was decreased, which indicates the inhibition of apoptosis in these samples.
Pharmacotherapy during pregnancy and its association with genome instability in mother and fetus
Authors: Đorđević Katarina , Arsenijević Slobodan , Milošević-Đorđević Olivera , Marinković Dragoslav , Grujičić Darko
Published: July 2023

Pregnancy is a special physiological condition, where drug treatment presents a special concern. The use of drugs during pregnancy is increasing. Micronuclei, chromosomal aberrations, and sister chromatid exchanges are biomarkers of early biological effects which play an important role in assessing the genetic integrity of both individuals and populations. The aim of this review is to make a cross-section of previously conducted studies on the detections of genotoxic effects of drugs on human peripheral blood lymphocytes, after therapeutic exposure during the second and third trimester of pregnancy, as well as in umbilical blood lymphocytes of newborns whose mothers received the same therapy. Previous studies have shown that the cells of pregnant women and newborns are very sensitive to the effects of genotoxins, and cytogenetic biomarkers are associated with the risk of developing numerous diseases, including cancer in adults. Altogether, the administration of various doses and times of use of medications should be performed with caution.
Dysregulation of NF-kB and JAK2/STAT3 signaling in the hippocampus of female WKY strain, a genetic animal model of depression
Authors: Stefanović Bojana , Virijević Kristina , Spasojević Nataša , Ferizović Harisa , Janković Milica , Vasljević Perica , Dronjak Slađana
Published: July 2023

Depression is a serious disorder with a large impact on both an individual's quality of life and society as a whole. This study aimed to evaluate the potential involvement of nuclear factor kappa-B (NF-kB) and the Janus activated kinase (JAK) and Signal transducer and activator of transcription proteins (STAT) signaling pathway in the pathogenesis of genetically predisposed depression in female rats. The obtained results showed increased phosphorylation in JAK2 and STAT3, and increased protein levels of NF-kB in the hippocampus of Wistar Kyoto rats compared to Wistar rats. These results suggest that disturbance in these pathways could have a significant role in the pathophysiology of genetically predisposed depression in females.
Antibiofilm activity of Lamium album L. Extracts
Authors: Terzić Jelena , Stanković Marina , Stefanović Olgica
Published: July 2023

In this study, the antibiofilm activity of ethanol, acetone, and ethyl acetate extracts of Lamium album was evaluated against nine clinical strains from human wound swabs and two reference strains. The extracts of L. album exhibited significant antibiofilm activity. The extracts inhibited cell attachment and subsequent biofilm formation. The activity was dose-and strain-dependent, which was confirmed by fluorescence microscopy. The effects on mature biofilms were lower. In addition, the results showed a decrease in bacterial auto-aggregation in the presence of the extracts and no motility reduction. Phytochemical analysis and identification of functional groups by using Fourier Transform Infrared Spectroscopy were also performed. The results obtained in this study provide a basis for further research on this plant species.
New record of marbled polecat Vormela peregusna (Mammalia: Carnivora: Mustelidae: Ictonychinae) out of its current distribution range
Authors: Simonović Predrag , Dekić Radoslav , Nikolić Vera
Published: July 2023

This sighting record of marbled polecat Vormela peregusna is the westernmost for this globally vulnerable (VU) carnivore out of the native distribution range and the first one for Bosnia and Herzegovina. The current national conservational status is unknown. Hence, this species should be data deficient (DD) in the national legislative.
Air transport accessibility in business tourism destinations in the COVID-19 pandemic: A Central and Eastern Europe perspective
Authors: Rudnicki Michał , Borodako Krzysztof
Published: July 2023

The purpose of this article is to examine the role and indicate the changes caused by the pandemic in the differentiation of the level of air transport accessibility for meetings in selected countries of Central and Eastern Europe. Using a network analysis of air connections between the selected largest airports in Central and Eastern Europe (over 1 million passengers), the accessibility of the most important cities in the meetings industry was investigated. The research is based on data sources (Eurostat, Scyscanner.com, International Congress and Convention Association - ICCA reports) in preand post-COVID times. The analysis is based on seven cities that host the largest number of association meetings. The study identifies three key observations: slow recovery of lost organizational powers, qualitative changes in the processes of meetings organisation, which is connected with the third conclusion - the dominant position of Warsaw as a regional hub for meeting participants in this part of Europe.
Does training and development affect employee retention in the hotel industry?: The mediator role of organizational commitment
Authors: Mirić Marija , Slavković Marko
Published: July 2023

The capacity of hotel companies to attract and keep qualified human resources is a critical factor influencing their long-term success. This study aims to verify the effects of training and development on staff retention in hotels located in the Republic of Serbia and to determine if a high degree of organizational commitment alters the strength of the link between these constructs. Descriptive and correlational analysis, ANOVA, T-test, and the regression model for testing mediation effects were applied to a sample of 97 hotel employees. The obtained results confirmed the statistical significance of the association between training and development and employee retention, along with the mediating role of their commitment in this relationship. The study's theoretical contribution enhances knowledge of the intricate connection between training and development, employee commitment, and staff retention. Additionally, the results support hotel management in reinventing the approach for controlling employees' work attitudes through a number of pragmatic implications.
The quality of hotel service as a factor of achieving loyalty among visitors
Authors: Gajić Tamara , Vukolić Dragan , Zrnić Miloš , Dávid Lóránt
Published: July 2023

The quality of service, as well as the impact of hotel business on achieving loyalty among hotel visitors, has always been a topic of research in the world. The aim of this research was to determine the level of service quality achieved in hotels at Mount Zlatibor, as well as whether quality factors influence the creation of loyalty among hotel visitors. The results of multiple regression analysis showed an evident influence of both tangible and intangible quality factors on loyalty. However, a slightly greater degree of influence of intangible factor was noted. Research can have theoretical and practical importance, as a complement to existing research, as well as for creating a hotel's business strategy.
Social media and corporate image as determinants of global and local brands purchase: Moderating effects of consumer openness to foreign cultures
Authors: Filipović Jovana , Šapić Srđan , Dlačić Jasmina
Published: July 2023

The main goal of this paper is to analyze the impact of social media marketing activities (SMMA) and corporate image as antecedents of global and local brands purchase. Furthermore, the goal of this research is to determine whether consumer openness to foreign cultures has moderating influence on selected relationships in the research model. The sample of 372 respondents was collected. Hypotheses were tested using structural equation modeling. For both local and global brands, SMMA and corporate image have a positive impact on consumer attitudes. Additionally, consumer attitudes influence positively consumer intentions concerning the purchase of both types of brands, and intentions have the same influence on the actual purchase of analyzed brands. Consumer openness to foreign cultures has moderating influence on relationships between the corporate image and consumer attitudes, regarding both global and local brands.
Digital security of the hotel brand
Authors: Bovsh Lyudmyla , Bosovska Myroslava , Okhrimenko Alla , Rasulova Alla
Published: July 2023

This article is devoted to the study of the brand digital security and its impact on the business processes of hotel businesses. The emphasis is on the fact that digital communications as key drivers of the sales system create increased risks to the security of the hotel business. The cost markers of hotel brands, operating in the market of hotel services of Ukraine in the dynamics of the pre-quarantine and post-quarantine periods are estimated. The structure of the capital's hotel services market by categories and price segments has been studied. There are described the factors related to the formation of the system of protection quality of content and information at different levels of formal and informal communications, necessary for providing digital security of the hotel brand. There are offered possible ways to increase the level of digital security based on the implementation of cyber resilience tactics in hotels, based on brand carriers and risk categories, as well as monitoring and control of informal communication channels.
Key cultural-historical determinants of tourism improvements of the Municipality of Bač
Authors: Sančanin Branislav , Penjišević Aleksandra , Stojanović Katarina
Published: July 2023

The Municipality of Bač is a true treasure trove of authentic tourist attractions due to its turbulent centuries-old past with preserved heritage. That is why the topic of this paper is the cultural and historical factors important for tourism development in the Municipality of Bač. The paper aims to point out the current situation, but it also wants to identify the development potentials of the Municipality of Bač. The process of valuing the heritage of the Bač Fortress, the Bodjani Monastery, the Franciscan Monastery, and the Turkish Bath is based on scientific, cultural, educational, and touristic values. For the purposes of work from August 23 to September 30, 2022, a survey was conducted on a sample of 115 respondents from Bač - the seat of the municipality of the same name, as well as in other settlements of this municipality. The total cultural and touristic value of the authentic heritage exceeds the other average values at the location, while the scientific value is the lowest compared to all the other. Due to the devastation of the Turkish bath, the overall educational function is not satisfactory.
The impact of an error in selection the pushbacks in the long-term planning of the open pit production on project quality, case study: Open pit Veliki Krivelj, Bor, Serbia
Authors: Kržanović Daniel , Rajković Radmilo , Jovanović Milenko , Jovanović Ivana , Mikić Miomir
Published: July 2023

Today, there is a large number of software in which various mathematical algorithms for optimization the open pits are implemented. However, the importance of experience of the mining engineers in planning is still crucial for the quality of mining projects. Proper selection of the pushbacks is one of the most important planning steps in a long-term planning of production at the open pit. Therefore, the mistakes that occur in this planning step have a great impact on the project quality. Using the example of the Veliki Krivelj project, this paper presents the importance of correct selection the Pushbacks from an aspect of satisfying the practical geometric mining constraints.
Analytical model for determining the availability of continuous surface exploitation systems, case study: I BTD system of the open pit Drmno
Authors: Gomilanović Miljan , Doderović Aleksandar , Stanić Nikola , Milijanović Aleksandar
Published: July 2023

This paper presents an analytical model for determining the availability of a continuous coal system at the open pit Drmno. A continuous coal-fired system is a technical system with sequential connection of elements in terms of reliability and functioning. Realization of the safe production is the main goal of continuous systems at the open pits. In order to achieve this goal, it is necessary to determine the availability of a continuous system. To determine the availability, data related to the I BTD system of the open pit Drmno Kostolac, more precisely the base with various downtimes over a period of 3 years (2016-2018), was used. This paper presents a case study for determining the availability of a continuous system at the coal open pit Drmno using an analytical model. The model can be applied to determine the availability of continuous systems at the open pit in the function of design, planning and implementation of production and maintenance systems and, as such, is applicable in the other industrial areas as well.
Dilemma in radiological examinations of pregnant women
Authors: Milošević Nikola , Milanović Srđan , Dožić Marko , Sotjanović-Rundić Suzana
Published: July 2023

Ionizing radiation is electromagnetic or particle radiation that has sufficient energy to cause ionization of atoms. The effects of radiation depend on the energy and type of radiation, the matter through which the radiation passes, the radiation dose and the phase of the cell cycle. The nature of ionizing radiation contributes to the importance of the topic of radiological examinations of pregnant women, i.e. the possible risk for pregnancy and the fetus. The risk of fetal damage depends on the absorbed dose of radiation and the stage of pregnancy. The risk is highest during organogenesis and in the early fetal period, it is slightly lower in the second trimester and the lowest during the third trimester of pregnancy. The aim of this review article is to present the dilemmas and ethical problems faced by clinicians and pregnant women in everyday radiological practice. The radiologist is obliged to inform the patient about the planned procedure, the way it is performed and possible complications, but communicating the diagnosis and proposing therapy, if necessary, should be the responsibility of the doctor who referred the patient for examination. When considering the use of radiation in pregnant women, the International Commission on Radiological Protection advises that the fetus be considered a member of the general population and that general radiation dose limits apply. Accordingly, in evaluating the risks and benefits of medical radiation exposure, two persons must be considered, the mother and child. When everything is taken into account, the risk of a radiological examination for the pregnant woman and the fetus, i.e. the relationship between the benefit and the risk is assessed in relation to each individual case separately, in agreement between the doctor, the pregnant woman and other interested persons.
European respiratory society practice guidelines in treatment of sarcoidosis: Clinical approach and suggestions
Authors: Marić Nikola , Belić Slobodan , Nikolić Nikola , Stjepanović Mihailo
Published: July 2023

Sarcoidosis can affect any organ and thus lead to a significant impairment of quality of life, even to an increase in mortality. Neurosarcoidosis, cardiac sarcoidosis, and pulmonary fibrosis in sarcoidosis are the forms of sarcoidosis with the highest mortality rate, and with the lowest response rate to the current therapy. A group of experts in the field of sarcoidosis, supported by the European Respiratory Society, created practice guidelines in the treatment of the most common forms of sarcoidosis, and provided suggestions for further research so as to create new therapeutic protocols. The evidence was obtained by reviewing literature. The aim of this paper is to bring these guidelines closer to doctors in daily clinical practice, in order to improve patients' quality of life and reduce mortality from sarcoidosis.
Revising the role of magnesium in epilepsy research and management
Authors: Stanojević Marija , Parezanović Miro , Popović Aneta , Spasić Svetolik , Lopičić Srđan , Nedeljkov Vladimir , Jovanović Zorica , Vučković Sonja
Published: July 2023

Magnesium is a bioessential mineral with multiple neuroactive effects. Mg2+ ion stabilizes excitable membranes. Epilepsy is the third most frequent chronic neurological condition characterized by spontaneous reappearance of unprovoked epileptic seizures, whose underlying mechanisms are not completely understood yet. A literature review on the role of magnesium in basic and clinical epileptology has been made in order to enlighten the importance of magnesium deficiency in the mechanisms of epileptic brain hyperexcitability, as well as the significance of including magnesium into the management of epilepsy patients. Neuronal magnesium requirements are high. The concentration of magnesium in the cerebrospinal fluid (CSF) is even higher than in the blood. In experimental epilepsy research, perfusing hippocampal slices with artificial CSF containing low concentration of extracellular Mg2+ is a frequently used animal model of spontaneously induced epileptiform activity. Magnesium deficiency is the most frequent clinically unrecognized electrolyte disbalance, often overlooked in epilepsy patients. Serum and CSF Mg2+ concentrations are lower in patients with epilepsy, as compared to healthy controls. Hypomagnesaemia increases seizure frequency and the risk of sudden unexpected death in pharmacoresistant epilepsy. Oral magnesium supplements help achieve better seizure control. Parenterally administered Mg2+ efficiently controls seizures in several epileptic encephalopathies in adults and children (in eclampsia, uremia, porphyria, febrile seizures, infantile spasms), and also helps control status epilepticus. Subclinical magnesium deficiency, very frequent in general population, acts as a factor contributing to seizure generation in epilepsy. It is recommended to assess magnesium status in epilepsy patients. This literature review reveals the therapeutic potential of magnesium as a simple antiepileptic agent, which exceeds its current clinical use.
New findings of Diacrisia metelkana (Lederer, 1861) (Arctiinae, Erebidae, Lepidoptera) in Serbia
Authors: Vajgand Dragan , Stojanović Dejan
Published: July 2023

Diacrisia (= Rhyparioides Butler, 1877) metelkana (Lederer, 1861) is a rare and local species in Europe. The data on new records of this species in Serbia are presented, for localities Sombor (Bačka) and Čardak-Deliblatska peščara (Banat). In Sombor, male was caught by light trap type "Bečej" (light source mercury lamp 250 W), on July 25 th , 2001. In Čardak, a male moth was found by mercury lamp (400 W Philips ML lamp) on July 3 rd , 2020.
Sosialisasi Platform Kampus Merdeka Sebagai Wadah Berkarya Guru
Authors: Anggraeni Dewi , Rizaldi Rizaldi
Published: July 2023

Platform merdeka mengajar adalah suatu aplikasi yang digunakan untuk membantu guru untuk mendapatkan referensi, inspirasi dan pemahaman untuk menerapkan kurikulum merdeka. SDN 015905 Binjai Serbangan Kecamatan air joman adalah salah satu sekolah sasaran yang menjadi fokus utama dalam peningkatan kualitas pendidikan. Isi platform merdeka mengajar antara lain adalah edukasi menjadi penggerak untuk guru dalam mewujudkan pelajar pancasila. Menyediakan referensi bagi guru untuk mengembangkan praktik mengajar sesuai kurikulum merdeka, serta mendorong guru untuk terus berkarya dan menyediakan wadah berbagi paktek yang baik. Tujuan pelaksanaan pengabdian ini merupakan memberikan pengetahuan dan pengenalan mengenai aplikasi platform kampus merdeka sebagai wadah berkarya guru.
Research Brief: Conflict, Climate Change and Environmental Degradation
Authors: McFee Erin , Röders Jonathan
Published: July 2023

This research brief examines the interconnected challenges of climate change, environmental degradation (ED), and armed conflict. The brief highlights the complex relationships between natural resources, ED, and organised violence through multi-sited examples of habitat destruction, pollution, water scarcity, oil and gas-related conflicts, and deforestation. Every such fragile setting exhibits an intricate interwovenness of climate change and ED into the tapestry of sociopolitical and economic violence. Effectively addressing the causes of armed conflict influenced by environmental factors necessitates a contextualised understanding of this dynamic. The research brief also acknowledges the differential impacts of ED's consequences on marginalised populations while highlighting the potential for women to play a transformative role in addressing ED and insecurity.
Peruvian Maca (Lepidium peruvianum) - III: The Effects of Cultivation Altitude on Phytochemical and Genetic Differences in the Four Prime Maca Phenotypes
Authors:   Faculty of Health Studies, Charles Sturt University & Therapeutic Research, TTD International Pty Ltd, 39 Leopard Ave., Elanora, QLD 4221, Australia, Meissner Henry O. , Mscisz Alina , Baraniak Marek , Mrozikiewicz Mieczyslaw ,   Research Institute of Medicinal Plants, 27 Libelta St., 61-707 Poznan, Poland;, Piatkowska Ewa , Pisulewski Pawel ,   Faculty of Food Technology, Cracow University of Agriculture, 122 Balicka St., 30-149 Krakow, Poland, Bobkiewicz-Kozlowska Teresa ,   Department of Pharmacology, Poznan University of Medical Sciences, Rokietnicka 5a, 60-806 Poznan, Polanda
Published: July 2023

In two trials, dietary and Glucosinolates’ characteristics in four Maca phenotypes have been examined with an extension into the determination of DNA sequences. Hypocotyls of the four prime phenotypes of Peruvian Maca - Lepidium peruvianum Chacon, labelled as “Yellow”, “Black”, “Red” and “Purple” were separated from mixed Maca crops cultivated in four geographically-distant locations in the Peruvian Andes at altitudes between 2,800m and 4,300 m a.s.l. It was found that at higher altitudes where Red and Purple Maca phenotypes were grown, the significantly higher (P<0.05) Glucosinolates’ concentrations, adopted as the marker of Maca physiological activity, were observed with the Purple phenotype showing the highest Glucosinolates’ content at 4,300m a.s.l., followed by the Red-coloured hypocotyls. Black Maca showed a reversal, but also a significant (P<0.05) trend, while the Yellow phenotype showed no visible altitude-inflicted response (P>0.05) and has consistently the lowest Glucosinolates content. Thus, it is reasonable to assume that the altitude at which Red, Purple and Black phenotypes of L. peruvianum are grown, may be responsible for the variation in physiologic functionalities, leading to different than expected specific therapeutic and health benefits induced by Maca phenotypes grown at diverse altitudes. Although promising, insufficiently precise differences in DNA sequences failed to distinguish, without any reasonable doubt, four Maca phenotypes cultivated either in the same or geographically-distant locations, and harvested at different altitudes a.s.l. Further research on DNA sequences is needed, with more primers and larger number of Maca phenotypes, considering biosynthesis of secondary metabolites and adaptation pathways induced by harsh environment at altitudes where Maca is cultivated.
Dimensiones cognitivas de las competencias investigativas
Authors: César Valdés Julio Cesar
Published: July 2023

Los cambios y transformaciones que ha generado la globalización en la pedagogía, han obligado a las universidades a rediseñar sus modelos educativos, encaminando sus funciones a una formación más comprometida y capaz de solucionar los problemas del entorno social y su permanente dinámica, formando personas con una elevada efectividad y seguridad en sí mismo. El objetivo del presente trabajo es analizar los elementos teóricos que sustentan las dimensiones cognitivas de las competencias investigativas. El objetivo planteado y la metodología diseñada permiten determinar, que las competencias en la educación superior deben estar encaminadas a transformar el proceso docente educativo, desde una mirada teórico-práctico, mediante la cual gira el proceso de enseñanza y logre ubicar en contexto la formación profesional en un ámbito político, económico, social, tecnológico, ambiental y legal con la intención de lograr una formación más integradora de los futuros profesionales. Se concluye planteando que el docente investigador desde su disciplina debe favorecerel hábito incesante por lo desconocido ya que el proceso investigativo no es una asignatura, proceso que debe romper el mito de la vieja escuela que la investigación es algo imposible de lograr y/o demostrar para que los docentes comprendan la necesidad intrínseca de ser investigadores necesariamente.
Глава 5. Особливості вчинення окремих нота­ріальних дій в умовах воєнного стану
Authors: Заіка Юрій Олександрович
Published: July 2023

The peculiarities of committing such notarial acts as testament certification, the inheritance agreement and the conclusion of a inheritance management contract in the conditions of wartime are considered. Attention is emphasized on circumstances that may distort the free will of the testator and the role of the notary in clarifying the true will of the person who applied for the notarial act. The criteria that must meet the requirements for the acquisition of inheritance have been considered. The proposal for video recording of the testament certification is supported. The need to change the legal consequences of declaring a testament invalid is substantiated.The problems of the execution of the inheritance contract after the death of the alienator and the possibility of its termination in case of failure of the acquirer to fulfill his obligations after the death of the alienator are considered. It has been proven that proper performance of the inheritance contract by the acquirer can be influenced by both circumstances of an objective nature related to military time and actions of the heirs, which can create obstacles for the acquirer in the execution of the inheritance contract after the alienator’s death, in particular, his burial, construction of a tombstone, holding a memorial dinner. It is proposed to amend the normative acts that determine the range of persons who should receive a medical certificate and death certificate, to grant such a right to the acquirer under the inheritance contract.When concluding an inheritance management contract by a notary, the main and mandatory requirement for the manager is his expertise and professionalism. It is proposed to stipulate in the inheritance management contract the duty of the manager to insure his civil liability for the consequences of economic activity, which will be a guarantee of protecting the interests of the heirs.
Cross-Border Cooperation as a Mechanism of Europeanization of Ukraine
Authors: Hrabynskyy Ihor , Mikhel Romana
Published: July 2023

The article analyzes the state of cross-border cooperation between Ukraine and EU Mem- ber States. The authors of the article deeply analyze the literature on cross-border cooperation as well as the typology of border regions in Europe. The article analyzes in depth the cross-border cooperation between Ukraine and the EU within the framework of the European Neighbor- hood Policy. The authors make a comparative analysis of two CBC programs for 2007-2013 and 2014-2020. They conclude that, unlike the program for 2007-2013, where the focus was on the economic development, in 2014-2020, the focus was on development of health care, cultural heritage, infrastructure projects and security.