bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Evolution of the Maternal Care Network in Romania. Directions of Development, Benefits and Limitations of Child Care Alternative
Authors: Mihaela-Gianina Lupu , Irina Franciuc 
Published: January 2023

Abstract
The development of family-type services was an important step in the goal of closing the classic state institutions with forms that would better meet the individual needs, identified in the situation of each child in difficulty.
The topic addressed in this paper refers to the evolution of the maternal care network since the date of legislation of this form of special protection in our country, analyzing aspects of legislative changes, innovative models, directions of development, the current operation of the system benefits but also obstacles encountered over time.
The Strategy for Improving the Quality of the Medical Services
Authors: Andreia Cojanu , Cosmin Preda , Leonard Gurgas 
Published: January 2023

Abstract
Healthcare management has certain particularities, especially when it comes to the quality of the services it provides. Continuous improvement and adaptation of these services to the needs of the patients it’s an activity which should be part of the strategy any medical institution has, especially hospitals.
In this paper we analyze the results of the evaluations prior and after several measures were implemented in order to improve the quality of the medical services in a medical institution.
Dental Services during the COVID-19 Pandemic
Authors: Mirela Rosu Elena 
Published: January 2023

Abstract
The quality of dental services is an important component in the process of oral health care and requires constant evaluation for a possible increase in it. With the SARS-COV II pandemic, dental services have suffered. The restrictions applied successively led to the closure of the dental offices, offering services to urgent cases only. Thus, throurh the questionnaire method, we formed a representative sample of the population covering a variety of professions and ages, generating a general opinion about the evaluation of the dental patient´s satisfaction of the services received between January 2022 and February 2022. The study group involved 151 patients.
On Treatment of Some Physical Properties of Gas in Simulation of High-Voltage SF6 Circuit Breakers
Authors: Torlak Muris , Čaluk Samir , Hadžović Belma Bosović , Smajkić Amer 
Published: January 2023

Abstract
Simulation of unsteady flow of SF6 gas in a simplified high-voltage circuit breaker model describing the nozzle, contacts and their nearest surrounding is presented. SF6 is considered as viscous, compressible, real gas described by Redlich-Kwong model. Heat transfer is taken into account due to the gas compressibility. The heat source, triggered by the electric arc between the contacts, was out of the scope of the current research, thus it was not included in the simulations presented. Turbulence, caused by the gas viscosity, is described using realizable k-ε model. In the simulation model, one of the contact sides – electrodes, is considered as moving at prescribed velocity. The part of the space ‘swept’ by the moving electrode is considered as the gas with imposed artificially increased viscosity in order to imitate the rigid body behaviour. Thus, no moving parts of the computational mesh are used in the model. The conservation equations of mass, momentum and energy, given in integral form, are solved using a finite-volume method on unstructured computational grids.
Influence of Vehicular Frequency on Air Quality of Delhi, India
Authors: Kumar Vijay , Gupta Sunita , Jolli Virat 
Published: January 2023

Abstract
Vehicular traffic has registered a phenomenal growth in the last few decades on Delhi roads, their increasing number is a cause of concern for city planners and administrators as they not only deteriorated the quality of environment but has also affected the human health. In this context, we studied the influence of traffic i.e., vehicular frequency on air quality of Delhi. Five sites were selected in four cardinal directions i.e., North, South, East, West and Centre for which data of air pollutants were already available in public domain (DPCC online website). Vehicular frequencies were recorded for Light Motor Vehicle (LMV) and Heavy Motor Vehicle (HMV) for both weekdays and weekends. Correlative analysis were carried out to study the relationship between vehicular frequency and air pollutants. The study showed, East of Delhi had the highest traffic load followed by North, West, South and Centre. We found statistically significant positive correlation between dust pollution, PM10 (r = 0.8) and PM2.5 (r = 0.6) with vehicular frequency while negative association with ozone (r = –0.5). A weak positive correlation was found with NOx (r = 0.2) while weak negative correlation with SO2 (r = –0.3). The study revealed that vehicular exhaust and their movement contribute in deteriorating the air quality of Delhi. Our findings suggest promotion of usage of public transport along with implementation of BS-VI stage vehicles and development of vegetation filters along the roads with native tree species.
Leaching of Heavy Metals from Contaminated Soil Stabilised by Portland Cement and Slag Bremen
Authors: Lindh Per , Lemenkova Polina 
Published: January 2023

AbstractLeaching behaviour is an important evidence of soil quality. The assessment of leaching of heavy metals from the contaminated soil is vital for environmental applications. However, leaching may differ in soil stabilised by various ratios of binders. In this study we measured leaching behaviour of soil contaminated by As, Cd, Co, Cr, Cu, Hg, Ni, Pb, V, Zn, methyl Hg, aliphatic compounds of hydrocarbons, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and dissolved organic carbon (DOC). To evaluate leaching of these substances we tested the effects of changed amount of binder (120 kg and 150 kg) and binder ratios (70/30 %, 50/50 % and 30/70 %) added to soil samples. Soil was dredged from several stations in Ostrand area, SCA Sundsvall Ortvikens Pappersbruk. The results demonstrated a systematically decreasing leaching with the increased slag. The contribution of this research include: (i) devising systematic approach to extract information on leaching from stabilised soil collected from the coastal area of Bothnian Bay, (ii) developing a workflow for stabilising soils by various combination of Portland cement Basement CEM II/A-V (SS EN 197-1) and ground granulated blast furnace slag (GGBFS), Bremen type (SS EN 15167-1), (iii) determining water ratio and density for the untreated and stabilised soil and performing comparative analysis, (iv) evaluating chemical content of pollutants and toxic elements in the aggregated soil samples. Treatment of the contaminated soil by binders improved its parameters by the increased strength and decreased leaching of heavy metals and toxic elements.
Transformation of the economic role of local self-government in low-urbanized territories in Ukraine: Initial conditions and social perception
Authors: Hlynskyy Nazar , Krykavskyy Yevhen , Hirna Olha , Savchenko Yuliia 
Published: January 2023

Abstract
Newly formed territorial communities acquire a real subjectivity in the processes of the management of territorial development: they become responsible for a significant share of day-to-day economic activities within their sphere of responsibility, especially in territories with a predominantly rural population. This article aimed to study the changing role of local self-government in ensuring the economic development of the low-urbanized territory, determining public opinion and expectations of residents from local governments in the new conditions. A public opinion poll of residents living in selected local communities was conducted. This article identified the objective factors of the level and pace of newly formed territorial communities’ development in Ukraine. It has been proved that the decentralization of power changes the role of local government and the expectations of residents from it and their assessments of the situation at the local level.
Empirical Modelling of Lithium Mitigation for Alkali-Silica Reactivity
Authors: Vacher Marc , Jacobsen Stefan 
Published: January 2023

Abstract
The Alkali-Silica Reaction (ASR) is a deleterious concrete chemical reaction that has been studied a lot since its discovery in 1940. The reaction produces a highly hygroscopic silica gel that swells into the pores of concrete, resulting in the critical decrease of the mechanical performances of the affected structures. Some methods have been investigated to limit expansion under a certain limit, among them lithium mitigation. However, the mechanisms are not really understood yet and determining the right amount of lithium is still arduous. An attempt for a method in coherence with experience is presented in this study, using the chemo-mechanical model of Larive and curve-fitting. The results provide accuracy to experimental measurements from several protocols, and call for further research.
Effect of High-Pressure Washing on Chloride Ingress in Concrete – Development of an Accelerated Test Method
Authors: Andersson Louise , Silfwerbrand Johan , Selander Anders , Trägårdh Jan 
Published: January 2023

Abstract
Bridges constitute an important part of the infrastructure. For bridges to have the longest possible service life with minimum repairs, the maintenance is of great importance. One type of bridge maintenance that is rarely researched is the continuous preventive maintenance. The continuous preventive maintenance consists of removal of vegetation, cleaning of bridge joints and drainage systems as well as high-pressure washing of the structure. The effect of washing is discussed but not properly researched. A study on the effectiveness of high-pressure washing on concrete is therefore being conducted. An accelerated test method is being developed to mimic field testing. The method has been developed through tests on small concrete specimens subjected to fluctuating temperature, fluctuating moisture, and repeatable exposure to de-icing salt during several cycles. The specimens are of two recipes where one represents an old concrete bridge with rather high water-cement ratio (0.6) and the other one represents a new concrete bridge with a low water-cement ratio (0.4). The first two versions of the method are described. The second version shows promising results, but the method needs further development to incorporate additional factors.
Determination of Fall Risk Predictors from Different Groups of Variables
Authors: Bobowik Patrycja , Wiszomirska Ida 
Published: January 2023

Abstract

Introduction.
Risk factors associated with falling in the elderly are numerous. Most existing tools use a combination of functional assessment and risk scoring based on known risk factors. The aim of the study was to verify which parameters could be used to predict fall risk (FR) in older women.

Material and Methods.
The study involved 56 inactive females aged 71.77 ± 7.43(SD). Backward stepwise regression analysis was performed to determine which independent variables predict FR in older women.

Results.
Significant predictors of FR were: in model 1 – age and body mass (in 32%); in model 2 – knee extensor strength of the right lower limb (KEs R) (in 20%); in model 3 – the Timed up and Go test (TUG) (in 25.5%); and in model 4 – medial-lateral stability index with eyes open (MLSI EO) (in 35%). By means of backward stepwise regression analysis using the above models, the variables that significantly influence FR in seniors were body mass, MLSI EO, KEs, and age. The above analysis shows that these indicators (model 5) may predict FR in older women in 59% of cases.

Conclusions.
It was determined that variables that significantly influence FR in seniors were body mass, age, KEs, and MLSI EO. Research should be continued to identify more predictors and define norms that indicate FR.
Modelling Front and Back Squat Record Scores in Long-Term Training of Young Weightlifters
Authors: Szyszka Paulina , Zielińska-Stubińska Weronika , Chwaluk Agnieszka 
Published: January 2023

Abstract

Introduction.
Front and back squats are multi-joint exercises used in sports to develop strength, power and muscle mass. Due to their movement structure and involvement of the main muscle groups, they are training measures that are used in strength training in various sports. A long-term training process leading to sports mastery requires the correct selection of loads as well as objective control of the training effects to date, both short-term and long-term. The aim of this study was to create a statistical model and to determine with it the character of the changes in the record scores in the front and back squat of young weight-lifters over a two-year training cycle.

Material and Methods.
The study included 17 young athletes training in competitive weightlifting. Recorded scores in the front squat and back squat were measured seven times (every three months over a two-year training cycle). The progression method was used to determine the maximum load, and the repetition with the highest load (1RM) was used in the calculations.

Results.
The subjects performed better in the back squat, but the difference between the results for both squats was approximately constant over the two-year training cycle. The time courses of both squats were similar over the analysed period. Systematic increases in maximum results were observed. The first statistically non-significant differences between the mean record values in successive measurements were found between the sixth and seventh measurements for both squats.

Conclusions.
Determining the relationship between front and back squat record scores can contribute to the optimisation of training loads in sports using strength training. Obtaining an analytical form of the course of record scores over time for both squats helps to assess the skill level of athletes and predict their performance in the next training macro-cycle.
Relationships Between Physical Fitness and Wrestling – Specific Fitness in Freestyle Wrestlers
Authors: Chaliburda Ireneusz , Cieśliński Igor 
Published: January 2023

Abstract

Introduction.
The aim of the study was to investigate the relationships between the parameters of conditioning preparation and specific fitness of freestyle wrestlers.

Material and Methods.
Seventy-four subjects were selected from freestyle wrestlers. All subjects were assessed for height, weight and body mass index. Agility, dynamic strength and strength endurance were assessed using standing broad jump, push-ups, wall bar hanging leg raises, pull-ups and a zigzag run. Wrestling-specific fitness was assessed using standing gymnastic bridge with return, wrestling carousel, front kip up, while special endurance was assessed with suplex throws of the mannequin.

Results.
For initial data analysis, one-way ANOVA was used. Further data analysis was performed with multiple regression. Suplex throws of the mannequin had the biggest impact on achieving high sports results. These findings suggest that specific fitness tests which simulate sports effort are the most reliable measures.

Conclusions.
Owing to special fitness tests, training can be monitored more effectively. The movements made during a sports fight should be taken into account while preparing a given test.
The Impact of the Covid-19 Pandemic Threat on Purchase Decisions of Travel Agency Customers in Poland
Authors: Dudek Andrzej , Jaremen Daria Elżbieta , Michalska-Dudek Izabela , Walesiak Marek 
Published: January 2023

Abstract

Introduction.
The dynamic increase in world tourism demand was interrupted by the COVID-19 pandemic. The package holidays market is one of the tourism branches affected by the crisis the most. The study aimed at identifying the direction of changes in purchase behaviors regarding package holidays caused by the COVID-19 pandemic.

Material and methods.
The research on tourists purchasing package holidays during the COVID-19 pandemic was quantitative and covered a nationwide online panel of respondents characterized by a representative distribution for the general population of Poles (n = 1502). At the data analysis stage, logit models of buyers’ behaviors were used. In the estimation process, GLM in R (R Core Team 2022) was applied.

Results.
The situation related to the COVID-19 pandemic significantly affected how tourists traveled. The conducted analysis made it possible to distinguish four segments of buyers during the pandemic and to identify factors determining the choice of one of the purchase patterns. Compared to the pre-pandemic period, a significant increase in the number of tourists who needed personal contact with sellers at brick-and-mortar travel offices was observed.

Conclusions.
The study presented a meaningful contribution to understanding purchase behaviors of tourists who prefer package holidays. It is one of the few studies that compared behavior patterns of holiday package buyers in the period before and during the pandemic. The knowledge of changes in package holiday purchase behaviors is essential for travel agencies to design effective marketing strategies.
Physical-mechanical Evaluation of Polyethylene Terephthalate Fiber Dune Sand Mortar Exposed to Elevated Temperature
Authors: Ghrieb A. , Abadou Y. , Choungara T. , Bustamante R. 
Published: January 2023

Abstract
The mechanical properties of mortar containing Polyethylene Terephthalate (PET) as Strapping Band Fibers (SBF) replacing natural sand have been studied by many researchers. These studies indicate that when SBF is used as a substitute for sand in mortar, the characteristics in both the fresh and hardened states are altered. This experiment’s purpose is to valorize local materials, which are abundant in the region of Djelfa (Algeria), in cement mortar manufacturing and to discuss the influence of these materials on the mechanical and physical characteristics of the resulting mortar at the room, and at the high temperature. This study presents the results of an experimental investigation into the effects of high temperatures on the properties of dune sand mortar made with strapping band fibers. The method for formulating the mortar mixes was based on the progressive replacement of dune sand by PET fibers, with weight contents of 0%, 0.5%, 1%, 1.5%, 2%, and 2.5%. Several tests have been carried out to study the evolution of the different characteristics of mortar mixtures. The workability, bulk density, compressive and tensile strengths, and all samples were subjected to temperatures of ambient, 100 °C, 200 °C, and 400 °C. The results demonstrate that the inclusion of the recycled fibers and the preservation mode had remarkable effects on the characteristics of the mortar obtained.
Assessment of Water Loss in the Water Distribution Network of Bendjerrah Using a Combination Approach of Fixed Area Variable Area Discharge, Minimum Night Flow, and Epanet Calibrator
Authors: Dorbani Meriem , Mansouri Rachid , Balla Faiza , Kherouf Mazouz 
Published: January 2023

Abstract
Water losses due to leakage are a pernicious problem for water utilities. Understanding and quantifying Non-Revenue Water (NRW) and water loss components is the first step in the management of urban water losses. Hydraulic modeling is a powerful tool to predict the impacts of different management scenarios on the hydraulics of the Water Distribution Network (WDN). The water distribution network (WDN) can be divided into a number of District Meter Areas (DMAs) with suitable sizes in order to apply pressure management. In this study, the Fixed Area Variable Area Discharge (FAVAD) concept and the number of leaks were analyzed for a number of water network pressure management areas in the city of Bendjerrah – the district of Guelma, Algeria. The analysis identified some anomalies concerning the parameters of some networks; especially those related to leakage exponent N1 values greater than 1.5. The approach used in this framework is based on the estimation of the leakage from the Minimum Night Flow (MNF) and the burst frequency of Average Zonal Pressure (AZP). After the use of this approach and the calibration procedure using the Epanet-calibrator on real District Meter Areas, the obtained results are very close to the real state of the network. In addition, this paper studies the possibility of explicitly incorporating the variation of the leakage zone in the hydraulic modeling of the water distribution systems. The results show that the power equation leakage exponent N1 estimates the total system leakage with an error of up to 20%. From the Minimum Night Flow, obtained by using the South African Night Flow (SANFLOW) practical tool, it was found that the actual losses calculated for sectors 1, 2, and 3 are respectively 25%, 45%, and 30%.
Assessing Photopic and Melanopic Daylighting Performance of Special Glazing System: A Full-scale Experiments
Authors: Hraška Jozef , Hartman Peter 
Published: January 2023

Abstract
Comparative research on the influence of daylight and visual environment on melatonin oscillations and the performance of space users was realized in two identical rooms with different glazing at the Faculty of Civil Engineering of the Slovak Technical University in Bratislava. The glazing in the windows had significantly different transmittances of melanopic light. This article presents measured changes in the intensity of photopic and melanopic daylighting values inside the rooms on horizontal and differently oriented vertical plane. Photopic and melanopic illuminances were measured under cloudy and partly clear skies during several months in 2021 and 2022. The article is also partially devoted to the effect of light from a computer monitor on the spectral composition of light on the eye of a person working with a computer. The article also analyzes the problems associated with the evaluation of non-visual aspects of daylighting of the interior spaces of buildings.
Experimental Research on the Thermal Instability of Fiber Polypropylene Concrete at 250 °C
Authors: Aidoud Assia , Bencheikh Messaouda , Khaldi Nacera 
Published: January 2023

Abstract
The high temperature in the concrete destroys the hydrates of the cement paste. This destruction means the weakness of the materials caused by the deterioration of their mechanical properties.
This work aims to study the behavior of high-performance fiber concrete sets at high temperatures; specifically, we used polypropylene fibers and studied their influence on deterioration behavior.
This study includes high performance concrete and three types of fiber concrete, each containing a specific ratio of polypropylene fibers (0.12 %, 0.18 %, and 0.24 %). Consequently, cubic test specimens (15 cm x 15 cm x 15 cm) were subjected to the temperature of 250 °C, with a speed of 2 °C/min followed by a step of one hour at the target temperature then cooling to the ambient temperature.
The results showed that fiber-reinforced concrete exhibited a better performance when exposed to the temperature studied. The mechanical properties were improved by up to 56% for compressive strength and 86% for tensile strength.
Theoretical Analysis on Reinforced Concrete Bridge from Non-linear Temperature Effect
Authors: Tomko Michal , Demjan Ivo 
Published: January 2023

Abstract
The paper presents a theoretical analysis that models the effects of temperature load induced on a two-pole, twobox reinforced concrete bridge. Implemented was theoretical analysis of thermodynamic effects, which was performed on a closed double-box reinforced concrete bridge structure. The modelling and analysis only considered the upper part of the load-bearing bridge structure. This type of bridge was selected to present the results of this study which analysed the worst effects of temperature acting on the bridge structure.