Assessment of psycho-emotional state of student with Mitral regurgitation and possible ways of its pharmacological correction

The article presents the results of psycho-emotional state assessment a person with Mitral regurgitation when he lies using the device for the physiological parameter record, and the possible ways of its pharmacological correction are offere

Insilico test of functional role of rs8068318 polymorphism of arterial hypertension-associated TBX2 candidate gene

In the course of this study, the functional role of rs8068318 polymorphism of the TBX2 candidate gene associated with the development of arterial hypertension was studied. The selection of the polymorphic locus was based on the data of the catalog of genome-wide association study (GWAS) of the National Human Genome Research Institute. The functional role was evaluated using online software: HaploReg (v4.1), GTExportal, and PolyPhen-

The influence of agro-climatic conditions on the yield of sunflower in the Belgorod region

The research showed that natural conditions and agro-climatic resources of the Belgorod region potentially are rather favorable for the cultivation of sun-flower. However, due to considerable variability of the agro-meteorological conditions in time and space, the sunflower yield will experience substantial var-iability by years and by the administrative districts of the regio

ЧИСЛЕННО-ПОЛЕВАЯ ОЦЕНКА ЭФФЕКТИВНОСТИ УКОРОЧЕНИЯ ОБМОТКИ СТАТОРА ТУРБОГЕНЕРАТОРА

On the basis of numerical calculations of rotating magnetic field, a turbogenerator is evaluated for cases of a shortened stator winding and a diametric one. The parameters compared are the shape and harmonic composition of the winding EMF, the alternating component of the magnetic field on the rotor surface, and the electromagnetic torque ripple.На основе численных расчетов вращающегося магнитного поля проведена оценка турбогенератора в случаях укороченной и диаметральной обмотки статора. Сравниваемыми параметрами являются форма и гармонический состав ЭДС этой обмотки, переменная составляющая магнитного поля на поверхности ротора, пульсации электромагнитного момента.На основі чисельних розрахунків магнітного поля, що обертається, проведена оцінка турбогенератора у випадках укороченої і діаметральної обмотки статора. Порівнюваними параметрами є форма і гармонійний склад ЕРС цієї обмотки, змінна складова магнітного поля на поверхні ротора, пульсації електромагнітного моменту

АВТОМАТИЗИРОВАННЫЕ РАСЧЕТЫ В ПРОГРАММНОЙ СРЕДЕ FEMM ДИНАМИКИ ЭЛЕКТРОМАГНИТНЫХ ПРОЦЕССОВ ТУРБОГЕНЕРАТОРОВ

Attention is paid to the popular FEMM (Finite Element Method Magnetics) program which is effective in the numerical calculations of the magnetic fields of electrical machines. The principles of the automated calculations providing the analysis of the dynamics of electromagnetic processes in turbo-generators are presented. This is realized in the form of a script on the algorithmic language Lua integrated with FEMM. The temporal functions of electromagnetic quantities are obtained by multi-position calculations of the magnetic field with ensuring its rotation together with the turbo-generator rotor. The developed program is universal in terms of the geometry and dimensions of turbo-generators, as well as the modes of their work with a minimum of input data in numerical form. This paper shows "extraction" of discrete temporal functions: the magnetic flux linkage of the phase stator winding; forces acting on the current-carrying and ferromagnetic elements of the structure; the magnetic induction at the fixed points; electromagnetic moment. This list can be expanded as part of the created program, as well as the use of the program can be extended to other types of electrical machines. The obtaining of a change period of any functions is provided by rotating the rotor to 60°.Представлены принципы автоматизированных расчетов в программной среде пакета FEMM для анализа динамики электромагнитных процессов в турбогенераторах. Это реализовано в виде скрипта на алгоритмическом языке Lua. Временные функции электромагнитных величин получаются посредством многопозиционных расчетов магнитного поля с обеспечением его вращения вместе с ротором турбогенератора.Представлені принципи автоматизованих розрахунків у програмному середовищі пакету FEMM для аналізу динаміки електромагнітних процесів в турбогенераторах. Це реалізовано у вигляді скрипта на алгоритмічній мові Lua. Часові функції електромагнітних величин отримуються за допомогою багатопозиційних розрахунків магнітного поля із забезпеченням його обертання разом із ротором турбогенератора

Refining Methodological Reflection: Exploring the Interviewing Experience of Oocyte Donors

Received 26 June 2023. Accepted 2 September 2023. Published online 6 October 2023.The article reflects on the collaborative experience between a practicing psychologist actively involved in the oocyte donation protocol (participating in guide development, conducting interviews, and drawing conclusions for the clinic) and a philologist who interprets the interview transcripts using narrative and communicative situation analyses. The article begins by describing the interviewing process, the structure of the oocyte-donor guide, and the profile of a “stable donor,” drawing from Russian-language materials. Through narrative analysis of 21 transcripts, the roles of the interviewer and informant at each stage of the interview process are identified, along with their contributions to the discussion and testing of the communicative situation. The paper investigates both the instances of cooperation and discrepancies observed among the participants as they strive to construct a credible and value-consistent autobiographical narrative that comprehensively encompasses their donation experience. The article analyzes both explicit and hidden narrative motives placed by informants in a conversation unfolding from the respondent’s past into a projected future. The authors aim to situate this experience within a broader personal value context, which includes compensatory aspects related to the pressing concerns of potential donors

АВТОМАТИЗИРОВАННОЕ ФОРМИРОВАНИЕ РАСЧЕТНЫХ МОДЕЛЕЙ ТУРБОГЕНЕРАТОРОВ ДЛЯ ПРОГРАММНОЙ СРЕДЫ FEMM

Attention is paid to the popular FEMM (Finite Element Method Magnetics) program which is effective in the numerical calculations of the magnetic fields of electrical machines. The main problem of its using - high costs in time on the formation of a graphical model representing the design and on the formation of the physical model representing the materials properties and the winding currents of machines – is solved. For this purpose, principles of the automated formation of such models are developed and presented on the turbogenerator example. The task is performed by a program written in an algorithmic language Lua integrated into the package FEMM. The program is universal in terms of varying the geometry and dimensions of the designed turbogenerators. It uses a minimum of input information in a digital form representing the design of the whole turbogenerator and its fragments. A general structure of the Lua script is provided, significant parts of its text, the graphic results of work's phases, as well as explanations of the program and instructions for its use are given. Performance capabilities of the compiled Lua script are shown on the example of the real 340 MW turbogenerator.Представлены принципы автоматизированного формирования графической и физической моделей турбогенераторов на алгоритмическом языке Lua для расчета их магнитных полей и параметров в программной среде пакета FEMM. Возможности составленного скрипта Lua демонстрируются на примере реального турбогенератора.Представлені принципи автоматизованого формування графічної і фізичної моделей турбогенераторів на алгоритмичній мові Lua для розрахунку їх магнітних полів і параметрів у програмному середовищі пакету FEMM. Можливості складеного скрипту Lua демонструються на прикладі реального турбогенератора

ОПРЕДЕЛЕНИЕ ЭЛЕКТРОМАГНИТНЫХ ПАРАМЕТРОВ И ФАЗОВЫХ СООТНОШЕНИЙ В ТУРБОГЕНЕРАТОРАХ АВТОМАТИЗИРОВАННЫМ РАСЧЕТОМ МАГНИТНОГО ПОЛЯ В ПРОГРАММНОЙ СРЕДЕ FEMM

The theoretical bases of calculation of electromagnetic quantities and time-phase relationship are presented for the turbo-generators. This is done by numerical calculations of the magnetic field in the software environment package FEMM (Finite Element Method Magnetics). A program which controls calculations and organizes the issuance of the results to a text file is created on the algorithmic language Lua. The program is universal in terms of a turbo-generator models, as well as steady-state modes of their work with a minimum of input data. The exciting current of the rotor and the phase currents of three-phase stator winding in accordance with their initial phase are given for the calculation of the magnetic field. The key function for the analysis of electromagnetic parameters is the calculated angular function of the magnetic flux phase stator winding. The expansion in the harmonic series is carried out and amplitude and initial phase are received for this function. Next, the phase EMF and voltage, phase shifts between all values, active power, electromagnetic torque, the magnetic flux in the gap and other parameters are determined. The presented Lua script is a prototype for a similar calculation software of electric machines of other types.Представлены теоретические основы расчета электромагнитных величин и их фазовых соотношений для турбогенераторов. Это реализуется путем численных расчетов магнитного поля в программном пакете FEMM. Расчеты автоматизированы посредством созданной программы на алгоритмическом языке Lua. Она управляет расчетами и организует выдачу результатов в текстовый файл. Представленный скрипт Lua универсален и может послужить прототипом аналогичного программного обеспечения для других типов электрических машин.Надані теоретичні основи розрахунку електромагнітних величин і їх фазових співвідношень для турбогенераторів. Це реалізується шляхом числових розрахунків магнітного поля у програмному середовищі пакету FEMM. Розрахунки автоматизовані за допомогою створеної програми на алгоритмічній мові Lua. Вона управляє розрахунками і організовує видачу результатів в текстовий файл. Представлений скрипт Lua є доволі універсальним і може послужити основою щодо створення аналогічного програмного забезпечення для інших типів електричних машин

The numerical field analysis of excitation modes and of the different types of the armature reaction in a powerful turbogenerator

Представлены принцип и результаты численно-полевого анализа разных режимов возбуждения и видов реакции якоря турбогенератора. Показаны выбор факторов возбуждения магнитного поля и метод определения на его основе магнитного потокосцепления, ЭДС и фазовых соотношений между ними и токами. Представлены картины магнитных полей во всех режимах, а также дан принцип построения соответствующих векторных диаграмм. Проведенные исследования могут быть основой совершенствования проектирования турбогенераторов и других электрических машин.Principle and the results numerical field analysis of the different excitation modes and of the different types of the armature reaction of powerful turbogenerator are presented. A selection of the factors of the magnetic field excitation in the idle mode, the rated load and short-circuit, as well as those specific modes that are characterized by longitudinal demagnetizing and magnetizing and more cross-reaction of the armature excitation of the magnetic field only the stator winding along the longitudinal and transverse axes of the rotor is shown. The principle, which allows by the results of the calculation of the magnetic field in each mode to determine the key electromagnetic values (magnetic flux and EMF) and the phase relationship between them and the currents is considered. The pictures of the magnetic fields are graphically presented in all modes, and also principle of construction of the corresponding vector diagrams is presented on the basis of calculation of these fields. In the original received vector diagrams it is possible to qualitatively and quantitatively identify the share and role of the magnetic field of the rotor and the stator magnetic field. The conducted research can be the basis for improving the system of study, analysis and design of turbogenerators and other electric machines because the considered method of analysis of magnetic fields is quite universa

Analysis of harmonic composition of the alternating magnetic field associated with the rotating rotor of a turbogenerator in the modes of no-load and short-circuits

Представлен численно-полевой метод расчета переменной составляющей магнитного поля на поверхности вращающегося ротора турбогенератора. Он основан на многопозиционных расчетах магнитного поля с поворотами ротора и изменениями токов в обмотке статора. В фиксированных точках поверхности выделяется переменная составляющая магнитной индукции и для ее временной функции выполнен гармонический анализ. Разработанный метод универсален с точки зрения режимов возбуждения, конструкции и насыщения магнитопровода. Теоретические основы апробированы расчетными исследованиями в режимах холостого хода и короткого замыкания турбогенератора.The method of calculating the alternating component of the magnetic field at the surface of the rotating rotor of a turbogenerator is presented. It is based on multiposition numerical calculations of the magnetic field with the turns of rotor and changes of currents in the stator winding. Discrete time functions of the alternating component of the magnetic induction are selected in points of the surface. For them, the harmonic analysis is conducted. The developed method is universal in terms of modes of excitation, designs and saturation of the magnetic core. The theory is confirmed by computational researches in the modes of no-load and short circuit of a large turbogenerator. In it, the alternating component of the magnetic induction on the rotor surface in the short-circuit mode is on an order of magnitude greater than in the no-load mode. Values and harmonic composition of the alternating component of the magnetic induction differ substantially at different points of the rotor surface. Harmonics are ponderable in the range from the level determined by the phase structure of stator winding to the level determined by the tooth structure of its core. The results obtained are qualitatively fit into the classical notion of oscillatory processes of the magnetic field on the rotor surface, but now the value and harmonic composition of the alternating component of the mag-netic induction are received adequate numerical filling. The result of work can be used for designing of a turbogenerators and other synchronous machine