bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analisis Dosis Serap Radiasi Pada Pemeriksaan Foto Thorax Dewasa di Instalasi Radiologi RSUD Raden Mattaher Jambi Menggunakan Metode Statistik One Way Anova
Authors: Listiani Listiani , Nehru Nehru , Nurhidayah Nurhidayah 
Published: July 2022

Sudah dilakukan penelitian tentang dosis serap radiasi pada pemeriksaan foto thorax dewasa di Instalasi Radiologi RSUD Raden Mattaher, Jambi. Penelitian ini bertujuan untuk mengetahui dosis serap radiasi fotothorax yang diterima oleh pasien dengan dewasa laki laki ataupun wanita untuk menjelaskan kesesuaian nilai dosis serap yang diperoleh pasien dengan standar dosis yang dikeluarkan olehBadan Pengawas Tenaga Nuklir (BAPETEN) nomor 8 tahun 2011.Penelitian ini terdiri dari pasien laki-laki dan wanita umur 20-40 tahun yang dikelompokanmenjadi 4 kelompok yaitu umur 20-25 tahun, 25-30 tahun, 30-35 tahun, dan 35-40 tahun. Dosis Serap Radiasi yang di hitung menggunakan rumus dan dianalisis dengan menggunakan program ANOVA berdasarkan jenis kelamin dan kelompok umur. Hasil yang diperoleh menunjukan dosis serap radiasi yang diterima oleh pasien dewasa laki-laki umur 20-25 tahun adalah 0,0164 mGray, umur 25-30 tahun adalah 0,0153 mGray, umur 30-35 tahun adalah 0,0154 mGray, dan untuk umur 35-40 tahun adalah 0,0147 mGray. Sedangkan untuk dosis serap radiasi diterima oleh pasien dewasa wanita umur 20-25 tahun adalah 0,0176 mGray, umur 25-30 tahun adalah 0,0158 mGray, umur 30-35 tahun adalah 0,0173 mGray, dan untuk umur 35-40 tahun adalah 0,0179 mGray. Secara garis besar nilai dosis serap radiasi yang diterima oleh pasien dewasa masih jauh dibawah 0,04 mGray, yaitu batas maksimal yang diijinkan oleh BAPETEN (Badan Pengawas Tenaga Nuklir).
Analisis Distribusi Suhu Maksimum dan Kelembaban Rata-Rata Untuk Mitigasi Kebakaran Hutan dan Lahan (Studi Kasus: Kabupaten Muaro Jambi)
Authors: Rustan Rustan , Handayani Linda 
Published: July 2022

Telah dilakukan penelitian tentang distribusi beberapa parameter metereologi saat terjadi kebakaran hutan dan lahan di kabupaten Muaro Jambi. Parameter metereologi yang digunakan adalah suhu maksimum dan kelembaban rata-rata harian kabupaten Muaro Jambi sepanjang tahun 2019. Data tersebut diolah menggunakan Microsoft Excel dan dipetakan menggunakan perangkat lunak Surfer 11 untuk melihat distribusi suhu maksimum dan kelembaban rata-rata secara temporal. Surfer 11 secara default menggunakan metode Kriging dalam proses gridding data. Selain itu digunakan juga data jumlah titik panas (hotspot) provinsi Jambi tahun 2019 berdasarkan data satelit AQUA/TERRA (LAPAN) untuk melihat distribusi titik panas berdasarkan bulan dan kabupaten. Hasil yang diperoleh yaitu suhu maksimum yang terbesar berada pada rentang 33.5 °C – 36 °C dan kelembaban rata-rata terkecil berkisar 62% – 72%, terjadi pada bulan September 2019. Sedangkan dari pengolahan data hotspot, jumlah titik panas terbanyak terdapat di kabupaten Muaro Jambi dan terjadi pada bulan September 2019. Hal ini menunjukkan bahwa kebakaran hutan dan lahan akan cenderung mudah terjadi pada kondisi cuaca suhu tinggi dan kelembaban rendah
PROTOTYPE OF THE CALCULATION DEVICE OF DYNAMIC COST OF THE BASIC PART OF ELECTRICITY
Authors: Boiko I. 
Published: July 2022

In order to implement flexible dynamic billing, consumers need to be able to respond dynamically, which is determined by constantly monitoring the impact of feedback between the supplier and consumers of electricity on changes in the values ​​of load parameters. Smart sensor technologies allow a unified power supply system to supply electricity more efficiently through dynamic analysis of supply and demand. It is proposed to implement the task of tracking the electricity consumed by each user in order to comply with the conditions of macroeconomic equilibrium and dynamic optimization of the pricing mechanism for electricity using the concept of smart meters.
The aim of the study is to develop a system for flexible dynamic determination of the cost of the basic part of electricity for each generator in the local isolated SmartGrid. If the volume of generated energy deviates from a certain level set for a given time interval, a new calculation of the new tariff value per basic part of electricity must be performed every second. Each consumer is connected to a meter, which registers the change in the amount of electricity received in a dynamic mode. The meter contains a built-in microprocessor and is equipped with a radio module for registration and data exchange with a summarizing microcontroller, which performs the functions of calculating the total amount of electricity consumed. As well as part of the electricity supplied by a particular generator. To calculate the cost of basic part of electricity for each generator in the power system and the total cost of electricity generated every second by all generators, the using of a third microcontroller with built-in microprocessor and radio module is proposed. As a result, the simulation of the proposed device on the example of a system with one generator demonstrated its adequate operation in accordance with the theoretical provisions.
STUDY OF XENON POWER FLUCTUATIONS IN WWER-1000 REACTORS IN ONE-DIMENSIONAL AXIAL GEOMETRY
Authors: Khalimonchuk V.A. , Palamarchuk M.M. 
Published: July 2022

The article uses the adiabatic modelling method for slow transient processes in nuclear reactors. The essence of this method is that the spatial component of the neutron flux density is determined by the solution of static equations of neutron transport. And the time dependence is reduced to the change of parameters (neutron interaction cross-section) of neutron transport equations accordingly to the change of 135Xe, 149Sm concentrations.
In this work, we propose to use a unidimensional (axial) model in the two-group diffusion approximation to investigate xenon transients. As a result, the effect of delayed neutrons in this case may be overlooked. All neutrons are assumed to be instantaneous because the lifetime of both instantaneous and delayed neutrons is much shorter compared to the characteristic time of the xenon transition process. The diffusion equation is based on a balance equation in which the generation, absorption, and leakage of neutrons per unit core volume determine the rate of change in neutron density over time. The differential equations used to calculate the spatio-temporal behavior of the neutron field in the core volume are calculated numerically, by finite-difference method, and analytically. The neutron-physical constants of each axial layer are determined by averaging, taking into account the number and types of fuel assemblies in accordance with the loading of the core in question. The fuel assembly type constants are preliminarily calculated using spectral codes.
As a result of the work, an algorithm for the physical calculation of the WWER 1000 reactor in one-dimensional axial geometry was obtained, the validation of the developed program was carried out, a number of transient calculations were carried out and a variety of xenon transient optimizations were proposed.
CORRECTION SCHEMES FOR THE GYROMAGNETIC COMPASS
Authors: Meleshko Vladyslav , Romanov Valery 
Published: July 2022

In connection with the significant progress in the improvement of sensitive elements (gyroscopes, accelerometers, magnetometers), as well as the increased possibilities of information processing by computational means, it became necessary to use modern algorithms for constructing correction systems for the gyromagnetic compass.
The object of research is the correction circuits: with an adaptable proportional-integral-differential (PID) controller, with a Fuzzy controller, with a Kalman filter for correcting the gyroscopic meter according to the magnetic heading sensor. In this case, the well-known scheme of a gyromagnetic compass with a torque proportional-integral (PI) correction is taken as the basis for comparison. Smoothing of the oscillatory error of a magnetic compass, which may be predominant, is considered. The subject of research is the accuracy characteristics in the steady state.
The study is carried out by simulating the operation of a gyromagnetic compass. The root mean square error (rms) and the mean value of the error are taken as the correction characteristics. At the same time, the transitional process of the initial exhibition is also controlled.
In the algorithms under study, new solutions are applied.
In the differential PID channel, a quarter-period delay of the dominant oscillations is applied, and the gain of the differential channel is adjusted according to the oscillation frequency. This setting allows you to almost completely smooth out the oscillatory error of the gyromagnetic compass by compensating for the oscillatory error with the received signal in the differential circuit.
In the Kalman filter scheme, the resulting heading error estimate is in antiphase with the error. After the introduction of a delay in the estimate for half a period of fluctuations, the estimate almost completely corresponds to the error. As a result, the oscillatory error can be almost completely eliminated in the instrumental heading value.
The article shows that all three investigated correction schemes show better characteristics in comparison with the known basic scheme. The highest accuracy can be achieved when applying the Kalman filter with the necessary settings for the perturbation, observation and initial error matrices.
The simplest to implement is a circuit with an adaptable PID controller. Its characteristics are close to the scheme with the Kalman filter.
FREQUENCY METER WITH AUTOMATIC SELECTION MEASUREMENT RANGE
Authors: Tymchik Gregory , Podolian Oleksandr 
Published: July 2022

Frequency meters with automatic selection of the measurement limit are used to measure the frequency of the input signal, which varies in a wide range. Signal frequency meters (frequency meters) are one of the most numerous groups of measuring instruments that are widely used in various fields of technology. There are a large number of frequency meters, which are based on different principles. At the same time, the issue of creating frequency change meters, which have a principle of operation different from well-known systems, is still relevant.
The aim of this work is to develop an electrical signal frequency meter with automatic selection of the measurement limit, based on a new principle of frequency measurement, which has not been used before. An approach to the construction of frequency meters with automatic selection of the measuring range is proposed. The measurement is performed using a low-frequency single-band frequency meter. Pulses traveling with the frequency of the input signal are pre-formed. Pulses are counted on the meter formed by series-connected decadal meters for a specified time, after which, using a logic circuit, sequentially analyzes the states of the meter outputs, starting from the output corresponding to the maximum distribution coefficient. The analysis is performed to determine the output of the divider, the frequency value of which is greater than the maximum corresponding to the penultimate digit of the single-band low-frequency frequency meter and does not exceed the maximum frequency corresponding to its last digit. After that, the input of the single-band low-frequency frequency meter is connected to the selected meter output and the frequency is changed with the indication of the number and the automatically selected range. An approach to the automatic measurement of the frequency of the input signal, which varies widely, is proposed.
The proposed method allows, using simple and affordable means of circuit construction, to make a frequency meter with automatic selection of the measurement limit. In the future, the proposed frequency meter can be used in measuring the frequency of the signal from non-destructive testing, which will expand the range of its technical means used in measuring the frequency of the signal from non-destructive testing.
ANALYSIS OF CIRCUIT SOLUTIONS FOR CHOOSING THE CONVERTER FOR A WALKING HEXAPOD ROBOT
Authors: Platov Ilya , Pavlovskyi Oleksii , Pavlovska Yuliia 
Published: July 2022

In this paper, DC converters for their use in the power supply system of a walking robot - hexapod are considered. The problem of energy conversion of robots of this class is an urgent problem, because the quality of the transformation will depend on the time of their autonomous operation, which in turn is an important factor influencing the range of applications of the robot. In addition to power supplies, the converter plays an important role in this. The less losses it will provide during the operation of the robot, the longer the robot will be able to move in space and perform useful work.
In this regard, the analysis of existing circuit solutions was carried out - from the simplest versions of converters based on discrete components to more complex with the use of special chips. Based on the analysis, the advantages and disadvantages of certain types of converters were identified, directly for their use in the power supply system of a walking robot - hexapod.
Among the main types of converters were step-down, as their efficiency is higher than the step-up. In addition, the analysis of the types of transducers showed that linear transducers have worse efficiency compared to pulse. In this regard, the main emphasis in the work is on pulse converters.
Of the latter were selected converters built using special chips designed for use in converters, because compared to other circuit solutions, they allow not only to obtain stable current and voltage in wide ranges, but also have the ability to adjust them, making it easy to test on the model work different servos without replacing the converter. Due to the high values of the output current for the developed layout, you can do with one converter, which reduces the cost and simplifies the design as a whole. In addition, such solutions, compared to others, have less weight and size, which is positively indicated by the possibility of placing on the hexapod additional equipment or payload that the robot can carry in the process.
BASIC PRINCIPLES OF SPATIAL POSITION OF IMAGINARY AND REAL TONTOR STEP
Authors: Skytsiouk Volodymyr , Klotchko Tatiana 
Published: July 2022

The article defines the relevance of modeling the parameters of spatial location of an abstract object when performing various functions. Thus, modeling makes it possible to determine object movement trajectories both during industrial application in technological processes and when used to create bionic objects, for example, the action of artificial limbs, correction of the movement trajectory of an object with spatial orientation defects.
The main goal of research was to substantiate the analytical models of object movement, taking into account spatial coordinate systems, according to which coordinate transformations are carried out during the functioning of an abstract object of various applications.
The creation of a sensory complex to compensate for violations of limb functions based on the justification of analytical models of vector field of main systems of the object, characteristic of its vital activity, can solve the possibility of real actions of an abstract biotechnical object in interaction with other objects of the external environment. It is necessary to compare the idealized parameters of vector fields with the real current characteristics of the object under study and to determine the difference as a differential function that corresponds to diagnostic parameters of state of object's limbs trajectory. Or when applied in industrial conditions, errors in the reproduction of the movement trajectory are taken into account.
As a result, the study of nature of this functional dependence of the state violation and its restoration in the automated mode of operation of the integrated tool will allow the creation of a computer-integrated hardware solution for the identification of objects that interact by approaching and touching their surfaces.
Thus, determining the positioning of TONTOR step in the space of movement of objects and during their interaction provides the possibility of the functioning of each abstract object when performing various types of work.
At the same time, it is necessary to significantly develop the base of physical and mathematical models that determine the vector fields of objects in dynamics over a certain time, taking into account the TONTOR step of the phantom and real spaces of the existence and operation of the object. Thus, hardware implementation of this hypothesis increases the accuracy of identification of objects interactions with a human limb, regardless of its condition, and the accuracy of determining their relative location in space.
MATHEMATICAL APPARATUS FOR MODELING OF THE PROPAGATION THE MAGNETIC FIELD ELECTRIC MACHINES WITH A GIVEN ACCURACY
Authors: Levchenko Larysa , Glyva Valentyn , Burdeina Nataliia 
Published: July 2022

. The problem of modeling the propagation local magnetic fields and spatially dispersed sources is large errors compared to field measurements. An important aspect of adequate modeling is the use of the correct mathematical apparatus. It is shown that in order to obtain reliable models of the propagation magnetic fields around electrical machines (generators, electric motors of different power, geometric dimensions and poles), it is advisable to apply the Gauss equation for a scalar potential. The solution of the equation in polar coordinates makes it possible to take into account not only the fundamental, but also other harmonics of the magnetic field (dipole, quadrupole, octupole). This allows, depending on the number of spatial harmonics taken into account, to obtain a model with the required accuracy (error) for predicting the magnetic field strength at any point around the machine. It is considered in the paper that an electronic machine is an object of base radius R0. The presented approach makes it possible to unambiguously determine the location of zero field points at a distance from the source (for a quadrupole source and zero field lines, for an octupole source). The results of modeling and their verification by full-scale measurements for the most common four-pole machines (quadrupole source) are presented. The main task of modeling the propagation the magnetic field of such sources is to ensure the required accuracy based on the goals of modeling. It is shown that the modeling accuracy and the presence of zero field points are due to different field levels near the electrical machine housing for different harmonics. The dipole harmonic at the cabinet is 20% of its own harmonic. But it falls more slowly with distance. This necessitates taking into account a different number of harmonics depending on the value of the ratio R0/R, R is the distance to the point of determining the field strength from the source. Therefore, with the ratio R0/R=2/3, the eighth harmonic is essential. At R0/R=1/5, already the fourth spatial harmonic can be neglected. Such data allow you to choose a rational number of harmonics. This reduces the amount of calculations and simplifies the process of modeling the propagation of the magnetic field around the source.
Azimuthal differences and changes in strain rate and stress of the Japanese Islands deduced from geophysical data
Authors: Kosugi Issei , Mitsui Yuta 
Published: July 2022

Abstract
Geodetic and seismological observations have shown discrepancies between azimuths of maximum contraction of strain rates and maximum compression of stress. These discrepancies can be the results of the superposition of localized or transient mechanical processes such as fault coupling during seismic cycles. Rich sets of recent geophysical data allow us to conduct spatiotemporal imaging of the discrepancies. Here, we estimate the spatiotemporal evolution in the strain-rate fields of the Japanese Islands with optimized smoothing distances from 1997 to 2021 using Global Navigation Satellite System (GNSS) data, and investigate how the maximum contraction axes of horizontal strain rates differ from those of horizontal stress based on earthquake focal mechanisms. Several characteristic results are observed for each region within the Japanese Islands. Both azimuths of the strain rates and stress differ by more than 60 degrees over hundreds of kilometers from the Kanto region to along the Nankai Trough, related to seismotectonics due to the dual subduction of the Philippine Sea plate and the Pacific plate beneath the Japanese Islands. The azimuthal differences tend to be small along tectonic zones with active inland earthquakes and high strain rates on the back-arc sides. We also find that the 2011 off the Pacific coast of Tohoku earthquake caused notable azimuthal differences in the strain rates and the stress in the Tohoku region. Our dataset has wide spatiotemporal coverage and can serve as a basis for further research, for example, to estimate the current fault conditions during seismic cycles.
Does COVID-19 confinement period affect the body composition and physical performance of young elite soccer players?
Authors: Oliveira Lucas de Paula , Aquino Rodrigo , de Castro Fábio Marzliak Pozzi , Pimenta Pedro Mingoni , Gonçalves Luiz Guilherme Cruz , Nobari Hadi , Puggina Enrico Fuini 
Published: July 2022

Abstract
Background: The current pandemic caused by COVID-19 generated several changes in lifestyle. However, with the gradual return of activities, there are divisions about the real impact of the confinement period on the body composition and the players' motor capacities. The objectives of the present study were to verify the effects of a COVID-19 confinement period on body composition and physical performance in young soccer players. Methods: Twenty-one elite soccer players (17.6 ± 1.4 years) participated in the study. Assessments of body composition, squat jump, countermovement jump, isokinetic and intermittent yo-yo were performed before and after seven months of confinement period. Results: Significant reductions were found in the total distance covered in the intermittent yo-yo test (pre 1824 ± 243.70 and post 1640 ± 351.30 m; 95%CI = -349.00 -18.03 m; p = 0.031; ES = 0.60) after the confinement period. On the other hand, no significant alterations were found in the other tests. Conclusions: These results indicate that confinement promotes negative effects on the aerobic endurance of players, but not on body composition and lower limb strength and power. Thus, physical trainers and staff should direct attention to the development of aerobic endurance after similar periods of confinement.