bluuebunny/crossref_metadata_2025 huggingface dataset:
Development for performance of Porter stemmer algorithm
Authors: Elias Polus Manhal , Abbas Thekra
Published: March 2021

The Porter stemmer algorithm is a broadly used, however, an essential tool for natural language processing in the area of information access. Stemming is used to remove words that add the final morphological and diacritical endings of words in English words to their root form to extract the word root, i.e. called stem/root in the primary text processing stage. In other words, it is a linguistic process that simply extracts the main part that may be close to the relative and related root. Text classification is a major task in extracting relevant information from a large volume of data. In this paper, we suggest ways to improve a version of the Porter algorithm with the aim of processing and overcome its limitations and to save time and memory by reducing the size of the words. The system uses the improved Porter derivation technique for word pruning. Whereas performs cognitive-inspired computing to discover morphologically related words from the corpus without any human intervention or language-specific knowledge. The improved Porter algorithm is compared to the original stemmer. The improved Porter algorithm has better performance and enables more accurate information retrieval (IR).
Effect of target-substrate distance on thickness and hardness of carbon thin films on SKD11 steel using target material from battery carbon rods
Authors: Purkuncoro Aladin Eko , Soenoko Rudy , Santjojo Dionysius Joseph Djoko Herry , Irawan Yudy Surya
Published: March 2021

Carbon thin films on SKD11 steel were deposited by 40 kHz frequency plasma sputtering technique using a waste of battery carbon rods in argon plasma, and their mechanical properties were investigated by various target-substrate distances (1 cm, 1.7 cm, 2 cm, and 2.4 cm). The power used is 340 watts, the vacuum time is 90 minutes, and the gas flow rate is 80 ml/minute. The deposition time of carbon in plasma sputtering is 120 minutes with the initial temperature (temperature during vacuum) of 28 oC and the final temperature (the temperature after plasma sputtering) is 300 oC. The hardness value of SKD11 steel deposited with carbon thin films on SKD11 with target-substrate distance was tested using the Vickers microhardness test. Testing the thickness of the carbon thin films on the SKD11 steel substrate was carried out using a Nikon type 59520 optical microscope. Qualitative analysis of the thickness of the carbon thin films on the SKD11 steel substrate at a scale of 20 μm is shown by an optical microscope. Qualitatively, the thin film at a distance of 1.7 cm looks the brightest and thickest than other distance variations. Based on the Vickers microhardness test and Nikon type 59520 optical microscope, at the distance of 1 cm to 1.7 cm, the average thickness and hardness increased from 10,724 μm (286.6 HV) to 13,332 μm (335.9 HV). Furthermore, at the variation of the distance from 1.7 cm to 2.4 cm, the average thickness and hardness continued to decrease from 13.332 μm (335.9 HV) to 7.257 μm (257.3 HV). The possibility of interrupting atoms colliding with argon atoms in inert conditions increases at a long distance, thus causing the deposition flux on the SKD11 steel substrate to decrease
Identification of patterns of crystal-chemical transformations in historical artifacts made of metals
Authors: Indutnyi Volodymyr , Merezhko Nina , Pirkovich Kateryna , Andreiev Oleksii
Published: March 2021

The theoretical substantiation of the process of elimination of individual chemical elements from crystal lattices of metals in the process of the crystal-chemical transformations taking place during the long history of artifact existence was given. To confirm the theoretical conclusions, five ancient gold items from different historical periods (from the IV century B.C. to the XVIII century A.D.) with approximately the same contents of gold, silver, copper, and iron in the alloy body were studied. The conducted studies will promote more exact attribution of historical artifacts made of metals and revealing the signs of forgery or restoration.
The chemical composition of items was determined immediately under patina and in the alloy body using a scanning electron microscope equipped with an energy dispersion spectrometer. The results have shown a much lower gold content inside the alloy than in the item surface. At the same time, the undamaged surface cleansed of mineral crusts contained significantly fewer impurities than the polished surface which did not have contact with the environment. Therefore, the study of the chemical composition of gold artifacts cannot be conducted solely based on surface studies.
The studies have resulted in establishing a dependence of the concentration of the main component (gold) of the alloy in the artifact surface on the item age in thousands of years. Equations for predicting the age of the items that are chemically belonging to the described item group were also presented.
Studies of peculiarities of crystal-chemical processes are very important in practice to prove the historical artifact authenticity, adjust artifact dating, identify signs of forgery or profound changes caused by restoration
Performance of perovskite solar cell coated with graphene oxide as hole transport layer
Authors: Hatib Rustan , Soeparman Sudjito , Widhiyanuriyawan Denny , Hamidi Nurkholis
Published: March 2021

Organic metal halide perovskite has recently shown great potential for applications, as it has the advantages of low cost, excellent photoelectric properties, and high power conversion efficiency. The Hole Transport Material (HTM) is one of the most critical components in Perovskite Solar Cells (PSC). It has the function of optimizing the interface, adjusting the energy compatibility, and obtaining higher PCE. The inorganic p-type semiconductor is an alternative HTM due to its chemical stability, higher mobility, increased transparency in the visible region, and general valence band energy level (VB). Here we report the use of the Graphene Oxide (GO) layer as a Hole Transport Layer (HTL) to improve the perovskite solar cells' performance. The crystal structure and thickness of GO significantly affect the increase in solar cell efficiency. This perovskite film must show a high degree of crystallinity. The configuration of the perovskite material is FTO/NiO/GO/CH3NH3PbI3/ZnO/Ag. GO as a Hole Transport Layer can increase positively charged electrons' mobility to improve current and voltage. As a blocking layer that can prevent recombination. The GO can make the perovskite interface layer with smoother holes, and molecular uniformity occurs to reduce recombination. The method used in this study is by using spin coating. In the spin-coating process, the GO layer is coated on top of NiO with variations in the rotation of 700 rpm, 800 rpm, 900 rpm, 1,000 rpm, and 1,500 rpm. The procedure formed different thicknesses from 332.5 nm, 314.7 nm, 256.4 nm, 227.4 to 204.5 nm. The results obtained at a thickness of 227.4 nm reached the optimum efficiency, namely 15,3 %. Thus, the GO material as a Hole Transport Layer can support solar cell performance improvement by not being too thick and thin
Development of Fe-5Al-1C alloys for grinding ball
Authors: Kartikasari Ratna , Subardi Adi , Wijaya Andy Erwin
Published: March 2021

Our object of research is to combine the properties of Mn and the advantages of Fe-Al-C to improve the performance of grinding ball materials. Three Fe-5Al-1C alloys with compositions of 15 wt% Mn (FAM15), 20 wt% Mn (FAM20), and 25 wt% Mn (FAM25) were investigated. Argon gas was used to assist the removal of dissolved oxygen and to control the formation of metal oxides during Fe-Al-Mn-C (FAMC) fabrication. Microstructure analysis was conducted using scanning electron microscopy, and the Vickers microhardness tester was used to evaluate hardness. To guarantee the Fe-5Al-1C-Mn alloy phase, X-ray diffraction (XRD) test was performed. The EDS test was carried out to show the composition at different points and to observe the presence of several phases in the FAMC alloy system. A pin-on-disc method was employed for a dry sliding wear test, and corrosion testing was performed using the three-electrode cell polarization method. With the addition of Mn, the Vickers hardness of the FAMC alloy raised from 194.4 VHN at 15 wt% to 265 VHN at 25 wt%. The tensile strength and fracture elongation values were 424.69 MPa, 27.16 % EI; 434.72 MPa, 33.6 % EI; and 485.71 MPa, 38.48 % EI for FAM15, FAM20, and FAM25, respectively. A crucial factor for increasing the performance of grinding ball is the wear mechanism. The wear rate results for FAM25 show a decline of more than 57 % compared to FAM15 due to an increase in the hard intermetallic area. The addition of Mn elements increased the corrosion resistance of the FAMC alloys; the lowest corrosion rate occurred at 25 wt% Mn content at up to 0.036 mm/yr. According to the experimental results, the FAM25 alloys have the highest mechanical and corrosion resistance of the three types of alloys. The FAMC alloy is a promising candidate for application as a material for grinding balls by optimizing the Mn content
Universal method for solving optimization problems under the conditions of uncertainty in the initial data
Authors: Raskin Lev , Sira Oksana , Sukhomlyn Larysa , Parfeniuk Yurii
Published: March 2021

This paper proposes a method to solve a mathematical programming problem under the conditions of uncertainty in the original data.
The structural basis of the proposed method for solving optimization problems under the conditions of uncertainty is the function of criterion value distribution, which depends on the type of uncertainty and the values of the problem’s uncertain variables. In the case where independent variables are random values, this function then is the conventional theoretical-probabilistic density of the distribution of the random criterion value; if the variables are fuzzy numbers, it is then a membership function of the fuzzy criterion value.
The proposed method, for the case where uncertainty is described in the terms of a fuzzy set theory, is implemented using the following two-step procedure. In the first stage, using the membership functions of the fuzzy values of criterion parameters, the values for these parameters are set to be equal to the modal, which are fitted in the analytical expression for the objective function. The resulting deterministic problem is solved. The second stage implies solving the problem by minimizing the comprehensive criterion, which is built as follows. By using an analytical expression for the objective function, as well as the membership function of the problem’s fuzzy parameters, applying the rules for operations over fuzzy numbers, one finds a membership function of the criterion’s fuzzy value. Next, one calculates a measure of the compactness of the resulting membership function of the fuzzy value of the problem’s objective function whose numerical value defines the first component of the integrated criterion. The second component is the rate of deviation of the desired solution to the problem from the previously received modal one.
Absolutely similarly designed is the computational procedure for the case where uncertainty is described in the terms of a probability theory. Thus, the proposed method for solving optimization problems is universal in relation to the nature of the uncertainty in the original data. An important advantage of the proposed method is the ability to use it when solving any problem of mathematical programming under the conditions of fuzzily assigned original data, regardless of its nature, structure, and type
Peculiarities of the state of peripheral oxygenation of tissues in different kinds of combined anesthesia in children with congenital surgical pathology
Authors: Vlasov Aleksey
Published: March 2021

In the presented work, we have assessed the features of peripheral oxygenation in children with congenital malformations of the surgical profile under various types of combined anesthesia.
The aim of the study. To assess the state of peripheral oxygenation in newborns and infants with congenital malformations with various types of anesthetic support.
Materials and research methods. A retrospective study included 150 newborns and infants with congenital malformations of the surgical profile, depending on the anesthesia (inhalation + regional anesthesia; inhalation + intravenous anesthesia and total intravenous). The parameters of pulse oximetry were analyzed: peripheral oxygenation, heart rate. Additionally, the concentration of oxygen in the respiratory mixture of children was taken into account.
Research results. Peripheral saturation did not critically decrease at all stages of observation, with the exception of a decrease in the indicator in children of group I compared with group III at the stage of induction into anesthesia (97.79±2.45 versus 98.79±1.63, at p˂0.05, respectively) and at the most painful moment of the operation (96.29±3.47 versus 98.10±2.47, with p˂0.05). At the painful moment of the operation, it was in children of group I that a drop in heart rate was noted compared to group III (127.98±13.77 and 136.10±15.37, respectively, with p˂0.05) and group II (134.02±18.43, at p>0.05) against the background of a decrease in SpO2. Newborns and group I infants required higher oxygen concentrations in the breathing mixture. A significant difference in the indicator is noted between groups I and III at the traumatic stage – 0.47±0.29 and 0.33±0.2, with p˂0.05, respectively, and immediately after the operation – 0.34±0,19 and 0.26±0.13, with p˂0.05, respectively.
Conclusions. The expediency and effectiveness of pulse oximetry for children with congenital malformations at all stages of anesthetic support during surgical treatment was confirmed. The risk group for the formation of oxygen deficiency in organs and tissues, the occurrence of pain during the operation were newborns and infants, for whom combined anesthesia was chosen in the form of an inhalation method and regional anesthesia. In the case of the appointment of this type of anesthetic support, it is necessary to more closely monitor the indicators and promptly correct the deterioration of the child's condition
Cell immunity of laboratory animals under the influence of 5-indolylmethylene rhodanine-3-carboxylic/sulphonic acid derivative
Authors: Konechnyi Yulian , Hrushka Oksana , Pryzyhley Hanna , Konechna Roksolana , Lozynskyi Andrii , Korniychuk Olena , Lesyk Roman
Published: March 2021

The aim. To study the cell immunity status under influence of 3-[5-(1H-indol-3-ylmethylene)-4-oxo-2-thioxo-thiazolidin-3-yl]-propionic acid, as a prominent 4-thiazolidinone derivative and a class of biologically active compounds with polypharmacological properties.
Materials and methods. Experimental method on the model of laboratory animals (guinea pigs); intradermal allergy tests; relative and absolute content in the peripheral blood of T- and B-lymphocytes subpopulations; hematological indexies: index of the ratio of lymphocytes and monocytes, index of the ratio of neutrophils and monocytes, index of the ratio of neutrophils and eosinophils, phagocytic index, phagocytic number; ELISA; organic synthesis; pharmacological screening.
Results. The effect of 3-[5-(1H-indol-3-ylmethylene)-4-oxo-2-thioxo-thiazolidin-3-yl]-propionic acid has antifungal properties and affect cellular component of immunity in vivo in the guinea pigs model. There are no changes in the skin of guinea pigs during and after chemical applications of the skin and after intradermal tests. The compound stimulate the immune cells, in particular the lymphocyte (increase in the absolute number of CD3 T-lymphocytes by 21.46 % and the absolute number of CD8 T-suppressors by 27.15 %), but with a selective inhibitory effect on certain units (decrease the relative number of NK cells CD16 by 11.57 % and B-lymphocytes CD22 by 23.08 %). There was an increase in the activity of the macrophage phagocytic system (increase in PN by 439.87 % and PI by 62.73 % at 120 minutes), which indicates the reliability of the absorbing function of phagocytes, but with a decrease in their ability to endocytosis (PCI decreased significantly by 78,72 %).
Conclusions. Synthesized 3-[5-(1H-indol-3-ylmethylene)-4-oxo-2-thioxo-thiazolidin-3-yl]-propionic acid has a selective activating effect on certain parts of cellular immunity and on phagocytic activity. Derivate influence on the phagocytic activity of neutrophils is ambiguous, and the effect of the compound directed to the cellular part of the immune system does not cause cellular immunodeficiency. The studied derivative is promising for further study of the drug-like molecule with antifungal and antitumor effects
The use of liquid chromatography method for quantitative determination of active substances in Enalapril-H tablets
Authors: Bevz Nataliia , Myhal Artem , Ivanauskas Liudas , Gorokhova Olga , Grynenko Vasyl , Zhuravel Iryna
Published: March 2021

The aim. Combination therapy is used to treat hypertension. Strengthening the action of the ACE inhibitor enalapril is carried out in combination with the thiazide diuretic hydrochlorothiazide. On the pharmaceutical market, such combined preparations are presented by different manufacturers in various concentrations of the active ingredients of enalapril maleate and hydrochlorothiazide. Development of methods for the quantitative determination of active substances in combined drugs by liquid chromatography is topical.
Materials and methods. Shimadzu Nexera X2 LC-30AD liquid chromatograph equipped with DAD SPD-M20A diode array detector, SIL-30AC autosampler and CTO-20AC column thermostat; analytical balance - UniBloc AUW120D; pH meter - Knick type 911pH; chromatographic column ACE C18, size 250 mm × 4.6 mm, packed with octadecylsilyl silica gel for chromatography with a particle size of 5 μm.
Results. Based on the results of the work, a method for the quantitative determination of enalapril and hydrochlorothiazide in the presence of HPLC was proposed. The obtained validation characteristics indicate that the method for the quantitative determination of hydrochlorothiazide in Enalapril-H tablets corresponds to the following parameters: correctness, precision, linearity ( =0.70 ≤ max =1.60, d=0.22 ≤ maxd = 0.51, a=0.71  max a=2.60, r = 0.9997  min r=0.9981). In the quantitative determination of enalapril maleate in combined tablets, it was found that correctness, precision, linearity are performed ( =1.21 ≤ max =1.60, d=0.24 ≤ max d=0.51, a=1.35  max a=2.60, r = 0.9991  min r= 0.9981).
Conclusions. The method of quantitative chromatographic determination of enalapril maleate and hydrochlorothiazide in an antihypertensive combination drug has been improved. The proposed parameters of the chromatographic separation of the mixture in comparison with the initial ones contribute to a decrease in the costs of monitoring, a decrease in the volume of harmful emissions and cause an extension of the life of the chromatographic column
Modern view of speech readiness for school of children of older preschool age with typical psychophysical development and speech disorders
Authors: Bielova Olena
Published: March 2021

A theoretical review of modern scientific sources on the problem of "speech readiness" for the schooling of older preschool children with typical psychophysical development and speech disorders is presented. The aim of research: analysis of modern research on speech readiness for the schooling of older preschool children with typical and speech disorders. The objective of research was to substantiate scientific sources on the study of the terms "speech readiness" and "speech preparation" for school in older preschoolers; determination of components of speech readiness of children of older preschool age with speech disorders.
It is established that there are different views on the definition of the terms "speech readiness" and "speech training". Speech readiness for the school includes children's mastery of grammatical, lexical norms of speech, enriched vocabulary, use in educational and everyday activities of various functions of speech; it is determined that speech readiness contributes to the process of speech preparation of the future student to master the school curriculum. Speech training involves general and special training. It was determined that the formation of basic intellectual, semiotic and regulatory components is necessary for the speech readiness of children with speech disorders, which are formed under the influence of a special complex of correctional and developmental speech therapy work. Based on the analysis of scientific sources, the components of speech readiness for the schooling of older preschool children with speech disorders were identified: cognitive is about understanding of the semantic constructions of language and speech; motivational is about understanding of social and cognitive motives of learning; the component of activity - active participation in various types of speech activity; emotional - verbalization of emotions and feelings
Characteristics of visible autumn migrations of the Dunnock prunella modularis (Linnaeus, 1758) in National Park “Prypiat-Stokhid” in 2012-2017
Authors: Khymyn Mykhailo
Published: March 2021

The aim. The main purpose of the study was to find out the peculiarities of autumn migrations of birds, in particular such little-studied species as the Dunnock. This is necessary for the development and implementation of a management plan in the National Park for a whole complexes of migratory birds and separate species, first of all rare or small in number quantity.Materials and methods. Our research was conducted at the Prypiat River near Svalovychi village in Liubeshiv district, Volyn region of Ukraine in September and October 2012–2017. Observations were performed visually, starting in the morning half an hour before sunrise and ending in the evening half an hour after sunset (all hours of the light part of a day, without interruption). The light part of a day was divided into hour of observations, taking into the daily changes of sunrise and sunset. Flight altitude was determined visually, and flight directions – by 8 rhumbs.Results. There were 2124 individuals of the Dunnock counted during the study of visible autumn migration birds at one observation point in 2012–2017. The most bird migrated in flocks, but a significant part of them flew alone. The most numerous migrants this species were in small flocks – 2–5 individuals (89.9 % of all counted birds in flocks). There are from 2 to 38 individuals in one flock, on average – 3.2±0.15 individuals. The main passage lasted from the 2nd decade of September to the middle of the 2nd decade of October. The majority of them flew in the morning, in the first 3 hours of observations (75.5–83.5 % of all counted birds in different years, in average 79.6 %). The majority birds of this species were observed in flight within altitudes between 30 and 40 m (59.4 %) and the predominant direction of flight was W (52.4 %) and some less – SW (45.4 %).Conclusions. According to the results of 6-years research, the peculiarities of visible autumn migrations of the Dunnock have been clarified (the main passage – the 2nd decade of September – middle of the 2nd decade of October, majority of birds flew in the first 3 hours of observations, used altitudes between 30 and 40 m and the W and SW directions of passage). The results of our research are the basis for the further study of this species, planning and implementation of conservation measures for birds in the National Park “Prypiat-Stokhid”. The obtained data are also a supplement to the state of study of this species in Ukraine
Research of the characteristics of acoustic processes using wavelet transformation for detecting a diagnostic sign of the technical state of gas pumping units
Authors: Zamikhovskyі Leonid , Zamikhovska Olena , Pavlyk Volodymyr
Published: March 2021

The object of research is the degradation processes that take place in gas-pumping units (GPU) during its long-term operation and lead to the appearance of defects and, as a result, to a change in its technical state. Today, methods of parametric and vibration diagnostics are used to determine the technical condition of the GPU. To identify diagnostic signs of the technical state of the GPU, various transformations are used, in particular the wavelet transforms used in vibration processing that accompany the operation of the GPU and their technological parameters.
At the same time, in the study of the diagnostic signs of the technical state of the GPU, the acoustic processes accompanying the operation of the GPU, which can be more informative in comparison with the vibration ones, were practically not considered.
The developed experimental research methodology and their technical support made it possible to record the acoustic processes accompanying the operation of the gas compressor unit type GTK-25-i of the Nuovo Pignon company (Italy). In the course of the experimental studies, the realizations of the acoustic processes of the GPU were obtained for its three states – «nominal», «defective» and «current».
Further studies of acoustic processes for three states of the GPU type GTK-25-i and using the wavelet transform showed that by the appearance of the wavelet spectrograms it is difficult to notice the difference in the appearance or disappearance of various frequency components depending on the technical state of the GPU. To obtain quantitative indicators of this dependence, a discrete wavelet transform was carried out, which makes it possible to identify characteristic trends in the change in noise values at different scales. The values of the approximation norm and the detail norms in relation to the signal norm (in percent) were obtained for a five-level wavelet decomposition with datasets. A linear dependence of the norm of the wavelet-component of the fifth-order detailing on the operating time of GPU type GTK-25-i and (changes in the technical state), which can be taken as a diagnostic sign of its technical state, has been established.
The investigated diagnostic feature can be used as the basis for the method of diagnosing the technical state of GPU type GTK-25-i based on the characteristics of its acoustic process using the wavelet transform. An approach to identifying a diagnostic sign of the technical state of a GPU type GTK-25-i is considered based on the characteristics of acoustic processes using a wavelet transform can be used to identify a diagnostic sign of a condition for any type of GPU.
Study of structure of flows of a technological apparatus using the theory of random functions
Authors: Beznosyk Yurii , Bugaieva Liudmyla
Published: March 2021

The object of research is the structure of flows in the absorber of hydrogen chloride. One of the most problematic areas in the study of flow hydrodynamics in chemical-technological devices are both technological and technical difficulties, when the device is exposed to random disturbances and/or the supply of a standard indicator is impossible due to a violation of the technological regulations.
A method for studying the hydrodynamic structure of flows in a shelf absorber of hydrogen chloride of the «Korobon-KA» type (Germany) in the normal operation of a chemical apparatus using the theory of random functions is proposed. An industrial experiment was carried out on the operating equipment to determine the input and output concentrations of the components of the gas flow. The absorber of hydrogen chloride is considered as a one-dimensional object, at the input of which a random function acts – the concentration of hydrogen chloride in the input stream, and at the output there is a random variable – the concentration of hydrogen chloride in the output stream. The method for determining hydrogen chloride and chlorine in a gas stream is based on the absorption of chlorine by a solution of potassium iodide, followed by titration of the released iodine with sodium thiosulfate. In parallel, portions of acid were sampled at the inlet and outlet, and then the density and temperature of the hydrochloric acid solutions were determined.
An algorithm for calculating the impulse function estimates is developed. The obtained experimental data are smoothed. As a result of processing the experimental data, autocorrelation and cross-correlation functions were obtained, the Wiener-Hopf equation was solved, and the impulse weight function was obtained. Having calculated the moments of the obtained impulse weight function, it was proved that the structure of flows in the «Korobon-KA» absorber can be satisfactorily described by the ideal displacement model. The calculations were carried out in software environments MathCAD, Matlab.
According to the results obtained, the proposed method for determining the hydrodynamic structure of flows will find application in the study of chemical-technological devices, when the object is exposed to random disturbances and the supply of a standard indicator is impossible due to violation of technological regulations. This makes it possible to find the parameters of flow hydrodynamics in the apparatus in the mode of its normal operation.
Simulation of platform-free inertial navigation system of unmanned aerial vehicles based on neural network algorithms
Authors: Bieliakov Robert
Published: March 2021

The object of research is the process of controlling the trajectory of unmanned aerial vehicles (UAVs) in autonomous flight mode based on neural network algorithms. The study is based on the application of numerical-analytical approach to the selection of modern technical solutions for the construction of standard models of platformless inertial navigation systems (BINS) for micro and small UAVs, followed by support for assumptions. The results of simulation in the Matlab environment allowed to simulate the operation of the UAV control system based on MEMS technology (using microelectromechanical systems) and Arduino microcomputers. It was also possible to experimentally determine the nature of the influence of the structure of the selected neural network on the process of formation of navigation data during the disappearance of the GPS signal. Thus, to evaluate the effectiveness of the proposed solutions for the construction of BINS, a comparative analysis of the application of two algorithms ELM (Extreme Learning Machine)-Kalman and WANN (Wavelet Artificial Neural Network)-RNN (Recurrent Neural Network)-Madgwick in the form of two experiments. The purpose of the experiments was to determine: the study of the influence of the number of neurons of the latent level of the neural network on the accuracy of approximation of navigation data; determining the speed of the process of adaptive learning of neural network algorithms BINS UAV. The results of the experiments showed that the application of the algorithm based on ELM-Kalman provides better accuracy of learning the BINS neural network compared to the WANN-RNN-Madgwick algorithm. However, it should be noted that the accuracy of learning improved with the number of neurons in the structure of the latent level <500, which iincreases computational complexity and increases the learning process time. This can complicate the practical implementation using micro- and small UAV equipment. In addition, thanks to the simulation, the result of the study of the application of the proposed neural network algorithms to replace the input data instead of GPS signals to the input BINS, allowed to estimate the positioning error during the disappearance of GPS signals. Also, the application of the WANN-RNN-Madgwick algorithm allows to approximate and extrapolate the input signals of navigation parameters in a dynamic environment, while the process of adaptive learning in real time.
Language and Culture as Barriers to Healthcare for Chinese Immigrants
Authors:   , Leung Edwin
Published: March 2021

Immigrants and their descendants are projected to account for 88 percent of United States population growth through 2065. Currently, immigrants make up for about 13.5 percent of the US population. In addition, 65.5 million Americans speak a language other than English at home. Language and culture are the two most significant barriers faced by immigrants seeking health care. These barriers have a significant impact on immigrants’ ability to receive quality care, make them more vulnerable to poor health outcomes. Many resources exist to help immigrants with various needs including health care. However, more effort is needed to strengthen the resources that are aimed to address and alleviate language and cultural barriers in the health care system. This thesis reviews scholarly literature in order to provide a better understanding of the impact of language and cultural barriers on the health care seeking experiences of older Chinese immigrants, evaluate the efficacy of existing tools and services designed to address these issues, and proposes ways to improve these existing resources in order to build a better experience for all immigrants seeking health care.
Anaesthesia mumps after total laparoscopic hysterectomy under general anaesthesia
Authors: Udayakumar Prabha , Mani Kanmani , P. Hemaamallene
Published: March 2021

Anaesthesia mumps is a rare clinical entity characterised by acute transient swelling of the parotid gland in postoperative period. In our case a 58 years obese lady developed left sided parotid swelling which was managed conservatively and settled without any sequelae. In this article we discuss possible causes, differential diagnosis and treatment for this condition. This is to increase awareness about this relatively unknown condition amongst anaesthetist and surgeons and to avoid unnecessarily apprehension in post-operative period.
Chronic pancreatitis: diagnosis and management options in Indian subcontinent
Authors: Goel Dipesh , Virdi Verinderjit Singh , Gupta Money , Deolekar Sandesh
Published: March 2021

Background: Chronic pancreatitis is a heterogeneous disease. More research efforts are needed to clarify further whether individuals with chronic pain due to pancreatitis report a poor quality of life that necessitates intervention services. In this study, we sought to ascertain the clinical profile of subjects with chronic pancreatitis in India, especially with regard to risk factors, clinical features and therapeutic modalities.Methods: 50 patients of chronic pancreatitis were studied, both prospectively and retrospective. Investigations and interventions details were noted. Questionnaire for pain scoring was prepared. Persistent pain or recurrent episodes of acute pain interfering with normal lifestyle were the criteria for intervention.Results: The most common symptom of chronic pancreatitis is long-standing pain in the middle of the abdomen. 25 patients underwent intervention in view of severe pain. In our study improvement in endocrine function after intervention was observed in 27% of patients and improvement in exocrine function was seen in 60% patients after intervention at 2 yearly follow up.Conclusions: Surgical method and ERCP guided intervention gives superior results as compared to conservative method in management of chronic pancreatitis.
Screening of hearing loss in neonates and infants: a hospital based prospective study
Authors: Rajashekhar Rashmi P. , Karodpati Nayanna S. , Rajashekar Prashant , Sonar Tejal
Published: March 2021

Background: Approximately 12,000 new babies with hearing loss are identified every year, according to the National Institute on Deafness and other communication disorders. In addition, estimates are that another 4,000 to 6,000 infants and young children between birth and 3 years of age who passed the newborn screening test acquire late onset hearing loss. Therefore, 16,000 to 18,000 new babies and toddlers are identified with hearing loss per year making hearing loss the most common birth defect. Numerous studies over the decades have demonstrated that when hearing loss of any degree is not adequately diagnosed and treated, it can negatively affect the speech, language, academic, emotional and psychosocial development of young children. Hence, the most important aspect of managing a child with hearing loss is early identification.

Methods: The screening test was done on high risk neonates and neonates admitted in NICU for more than 48 hours from January 2018 to June 2019 for early detection of hearing loss if any.

Results: Our results showed that neonates with hyperbilirubinaemia, Low birth weight , birth asphyxia , meconium aspiration showed higher risk of hearing loss as the Oto Acoustic Emissions were absent in significant percentage of these high risk neonates and infants as compared to neonates without NICU admission.

Conclusions: Screening of high-risk neonates and infants is essential for early detection of hearing loss. Hence preventing the child from further developing profound hearing loss with loss of speech.
Clinical evaluation of low cost Indian knee prosthesis in government medical colleges
Authors: Abdul Aziz Ansari Muqtadeer , Rathod Pratik , Patel Altamash
Published: March 2021

Background: The clinical and functional outcome of total knee arthroplasty was studied using low cost Indian knee prosthesis called Destiknee by Maxx Company in government medical hospital. The objectives was to do assessment of pain relief, joint mobility and deformity correction post-operatively, pre-operative and post-operative Knee society score comparison.

Methods: Patients included were those who underwent primary total knee arthroplasty in Department of Orthopaedics, GMCH Aurangabad from January 2020 to January 2021. Clinical and functional assessment was done using the Knee society score and x-rays at 3, 6 and 12 months intervals.

Results: At 1 year follow up of 28 knees, there was an improvement in the average pre-op Knee society score of 53.92 to average post-op score of 86.25 and in the range of motion from 80.42 degree to 127.32 degrees and knee flexion deformity improved from 15.25 degrees to 2.17 degrees, all of which had a p value<0.05 are significant statistically. One diabetic patient with poor glycemic control had superficial infection and one developed minor pulmonary embolism which recovered with medical management. Patients had good satisfaction both in unilateral and bilateral TKA.

Conclusions: TKA resulted in significant reduction in knee pain and improvement in the functional ability of patients. The results of this low cost Indian prosthesis in a government rural setup with no laminar airflow with good efficacy and minimal complications are excellent. It was a boon for the rural population suffering from knee pain.
Utilization of the Ultrasonic Diagnostic Method in Rail Status on a Defined Railway Section
Authors: Kaščak Jakub , Török Jozef , Töröková Monika
Published: March 2021

In the article we deal with the issue of non-destructive diagnostics of a specified part on the railway, namely the rail. The chapters are devoted to the non-destructive defectoscopic method, or more precisely an ultrasonic test, which is performed by DIO 562 device and it also includes data processing from the measurement. The article briefly describes location and character of defects on the rails and actual process of measurement. The measurement was performed on a standard length of 10 km, with the use of a device capable of copying shape of the rails during the ultrasonic examination. The evaluation of the measurement was processed in specialized software DIO 2000 on the PC. Based on this evaluation, three manual inspections were implemented to determine the character of defects. The conclusion of this article is a precise determination of character and origin of these selected defects, and suggestion for their removal or replacement according to the valid regulations.
Solution Proposal for Utilization of the Waste Heat in Refrigeration Systems
Authors: Hadžiahmetović Halima , Blažević Rejhana , Peco Emina
Published: March 2021

The possibility for utilization of waste heat from processes in the food industry is presented in this paper. The need for reuse of waste heat comes from the fact that energy consumption in industrial companies is uneconomical and that environmental pollution has increased. Therefore, one of the method of reuse of waste heat that is applicable in industrial processes is presented in the paper. Potential primary energy savings is presented by implementing the waste heat recovery in the food factory. The paper presents a simplified solution proposal for installation of heat exchangers with the aim of utilizing the waste heat of the refrigerant. The results showed that by the implementation of simple heat recovery significant annual fuel energy savings can be achieved as well as fuel cost savings.
The Reinvesting Impact of Promotional Activity and Store Atmosphere on Impulse Buying Behavior: The Mediating Role of Payment Facility
Authors: Shah Syed Mir Muhammad , Sohu Jan Muhammad , Dakhan Sarfraz Ahmed , Sikander Ali Raja , Junejo Ikramuddin , Chouhan Irfan Mir
Published: March 2021

This study aims to recognize the factor effecting impulse buying behaviour with the mediation effect of payment facility. This study is based on primary data and data collected from Hyderabad Division of Sindh, Pakistan through adopted questionnaire. Number of respondents were 200 females who are engaged in impulse buying in supermarkets such as Baig Mart, Dawood Super Market, Max Bachat Super Market and Grocers. The store atmosphere and promotional activity are mediated by payment facility for impulse buying behaviour and partial mediation effect used. However, promotional activity revealed more important for impulse buying behaviour due to higher beta value than store atmosphere. In the previous research scholars explored the direct impact of promotional activity and store atmosphere. However, this study checked indirect effect in presence of mediator payment facility.
Reforming Legislation on Collective Labour Relations Engaging Trade Union as a Party
Authors: Yatskevych Ivan
Published: March 2021

The paper covers problematic issues of reforming the legislation on collective labour relations with the participating trade union representing the interests and defending the rights of employees, consisting in a workers’ collective, during collective bargaining, concluding a collective agreement, holding a social dialogue on the local level. The article contains an analysis of a draft legislation such as draft laws On Labour, On Amending Certain Legislative Acts of Ukraine (Regarding Certain Issues of Trade Unions’ Activity), On Amending the Law of Ukraine On Collective Agreements and Contracts in order to reveal the main trends of the proposed drafts, their scientific analysis, and producing own conclusions regarding impact of these draft laws upon the efficiency of the trade unions movement in Ukraine.The study of the proposed amendments to certain legislative acts as well as corresponding conclusions are made in observance of the current trends in the development of judicial application of legislative provisions on the preferential right of a unit trade union to represent a collective’s interests during collective bargaining regarding concluding or amending a collective agreement at an enterprise or institution. The paper contains a discussion on problematic (from a perspective of legal exercising and research) issues of the current legislative provisions on the safeguarding implementation of trade unions competence conformity to the Constitution of Ukraine, ILO Convention No. 87, and the recent case-law.The accordance of principles of rule of law and legality, representation, and efficient representing of workers’ collective interests during the in-court dispute resolution regarding representing the collective of workers and accession to an effective collective agreement is highlighted.In the conclusion it is stated that there is a negative trend on further deterioration of the trade unions’ position as representatives of labour collectives empowered with representative and defensive functions in relations with employers. Besides that, it is stressed that adoption and implementation of the argued legislative initiatives will eventually cause deepening the crisis of trade unionism and deteriorating of social standards. It will make a negative impact on a person’s social security in the state. There are grounds to assert forming case-law acknowledging works councils as equally authorized representatives of the workers’ collective in collective bargaining. In the meantime, the practice of rejection of new trade union’s units to join an effective collective agreement within the employer’s enterprise persists. It is concluded with the necessity to improve the system of normative safeguards for the trade unions activity and creating an efficient mechanism for countering abuse of rights, including safeguarding provisions, by parties of collective labour relations.
Cases of the European Court of Human Rights Significant for European Integration of Ukraine: Levchuk v. Ukraine, Judgment of 3 September 2020 (Final on 3 December 2020): Case Commentary
Authors: Pushkar Pavlo
Published: March 2021

The decision of the Strasbourg Court in the Levchuk case is important from the point of view of Ukraine's European integration prospects: first, from the point of view of the judicial system's response to domestic violence; secondly, from the point of view of the basic legislation concerning the possibilities of the state's response to these manifestations and the available means of protection. Thirdly, this concerns the ratification of the Istanbul Convention (Council of Europe Convention on Preventing and Combating Violence against Women and Domestic Violence), which entered into force on 1 August 2014, since Ukraine signed the Convention but has not yet done so. party in the absence of ratification of the Convention. It is clear that the future actions proposed by the Ukrainian authorities should be based on the established case law of the European Court of Human Rights, as well as on other international legal instruments, including the Istanbul Convention, which was signed but not ratified by Ukraine. Last but not least is the recognition of the Istanbul Convention as one of the key elements of the EU's foreign, and therefore domestic, policy as a legal mechanism for systematically combating domestic violence.
Mathematical Models of Reinsurance
Authors: Zhuk Tetyana
Published: March 2021

Insurance provides financial security and protection of the independence of the insured person. Its principles are quite simple: insurance protects investments, life and property. You regularly pay a certain amount of money in exchange for a guarantee that in case of unforeseen circumstances (accident, illness, death, property damage) the insurance company will protect you in the form of financial compensation.Reinsurance, in turn, has a significant impact on ensuring the financial stability of the insurer. Because for each type of insurance there is a possibility of large and very large risks that one insurance company can not fully assume. In the case of a portfolio with very high risks, the company may limit their acceptance, or give part of the reinsurance. The choice of path depends entirely on the company’s policy and type of insurance.This paper considers the main types of reinsurance and their mathematical models. An analysis of the probability of bankruptcy and the optimal use of a particular type of reinsurance are provided.There are also some examples and main results of research on this topic. After all, today the insurance industry is actively gaining popularity both in Ukraine and around the world. Accordingly, with a lot of competition, every insurer wants to get the maximum profit with minimal e↵ort.