bluuebunny/crossref_metadata_2025 huggingface dataset:
Occurrence of yttrium in the Zhijin phosphorus deposit in Guizhou Province, China
Authors: Chen Jiyan , Yang Ruidong , Zhang Jie , Chao Jinxing
Published: August 2022

The Zhijin phosphorite (P)-bearing rare earth element (REE) deposit in Guizhou Province (China) hosts vast ore resources (P: 1.348 billion tonnes; REE: 1.44 Mt). Up to date, the Zhijin phosphorite resource has not been exploited because of the uncertain occurrence of the associated REEs, which hampers mineral processing and extraction. In this study, the structure, the valence state, and the coordination position of Y in the REE-yttrium-rich bioclastic samples from Zhijin were revealed by means of synchrotron radiation X-ray absorption fine structure analysis. The results show that the Y occurs as Y(iii) in the samples, and that the form of Y is different from the Y2O3 form in standard xenotime samples. Yttrium in the samples was in a complex coordination position without Y–O–Y bonding, and the Y–O bond lengths range widely without clear patterns. We suggest that Y in the samples is surrounded by organic or macro-molecular compounds, rather than in inorganic ones. Thus, Y in collophanite is unlikely to be in the form of isomorphism.
Nitazoxanide inhibits osteosarcoma cells growth and metastasis by suppressing AKT/mTOR and Wnt/β-catenin signaling pathways
Authors: Ye Caihong , Wei Mengqi , Huang Huakun , Wang Yuping , Zhang Lulu , Yang Chunmei , Huang Yanran , Luo Jinyong
Published: August 2022

Osteosarcoma (OS) is the most prevalent malignant bone tumor with poor prognosis. Developing new drugs for the chemotherapy of OS has been a focal point and a major obstacle of OS treatment. Nitazoxanide (NTZ), a conventional anti-parasitic agent, has got increasingly noticed because of its favorable antitumor potential. Herein, we investigated the effect of NTZ on human OS cells in vitro and in vivo. The results obtained in vitro showed that NTZ inhibited the proliferation, migration and invasion, arrested cell cycle at G1 phase, while induced apoptosis of OS cells. Mechanistically, NTZ suppressed the activity of AKT/mTOR and Wnt/β-catenin signaling pathways of OS cells. Consistent with the results in vitro, orthotopic implantation model of 143B OS cells further confirmed that NTZ inhibited OS cells growth and lung metastasis in vivo. Notably, NTZ caused no apparent damage to normal cells/tissues. In conclusion, NTZ may inhibit tumor growth and metastasis of human OS cells through suppressing AKT/mTOR and Wnt/β-catenin signaling pathways.
Functional waveform pulse variable speed stirring to improve mechanistic analysis and experimental study on the purification efficiency of zinc sulfate solution
Authors: Wang Mengmeng , Wang Shibo , Wang Hua , Li Chunlin , Qi Xianjin , Xu Jianxin , Xiao Qingtai
Published: August 2022

This paper builds a wireless precision control function waveform pulse variable speed stirring device with point-to-point data transmission between the host computer and the microcontroller, which uses a programmable STM32 microcontroller as the system controller, superimposed with a single closed-loop static differential-free speed control system and a pulse broadband modulation (PWM) system to control the DC brush motor driving the stirring paddle based on arbitrary waveform function variable speed stirring respectively. The effects of different pulse waveform stirring systems on the purification effect of Cadmium ions (Cd2+) from zinc sulfate solution were studied under the same pulse period and maximum speed. The experimental results show that when K
P = 0.012 and T
i = 100, the anti-disturbance of the motor during the variable speed stirring process can be effectively improved, and the speed adjustment time is short and robust; when the Cd2+ purification rate reaches 92%, the purification time of the variable sine function stirring system is shortened by about 40% compared with that of the uniform speed stirring system, and that of the variable trapezoidal function stirring system is shortened by about 33.3% compared with that of the uniform speed stirring system. When the reaction is finished, the Cd2+ concentration is reduced to 6 mg/L by the variable sinusoidal stirring system only, and the Cd2+ concentration is lower than 10 mg/L in a shorter time compared with the time required for cadmium removal in the actual industrial production line.
Experimental study on direct contact condensation of saturated steam at low mass flux in subcooled quiescent water
Authors: Kaleem Muhammad Ahsan , Shah Ajmal , Iqbal Mazhar , Quddus Abdul , Mehmood Atif , Riaz Ali , Ayub Muhammad Khawar
Published: August 2022

The phenomenon of saturated steam jet injection in subcooled quiescent water has many practical applications including in heat exchangers, steam jet pumps, steam dumping systems in nuclear plants, etc. The experimental setup is designed and fabricated indigenously to investigate this phenomenon at lower mass fluxes ∼120 and 150 kg/m2 s. The steam jet of conical shape has been observed for all the test conditions. The recorded axial temperature distribution showed that near the nozzle region, the temperature is governed by the saturated condition of steam while the later region is dependent on the water pool temperature. The maximum temperature is observed to be at the center of the jet. It has been found that the dimensionless penetration length of the steam jet in water is directly dependent on both the temperature of the water pool and the mass flux of steam. The dimensionless jet length has been found in the range ∼1.54–2.02 and 2.07–2.19 for mass fluxes ∼120 and 150 kg/m2 s, respectively. The average heat transfer coefficient has been found in the range ∼1.97–2.37 MW/m2 K.
Uncertainty and realized jumps in the pound-dollar exchange rate: evidence from over one century of data
Authors: Gkillas Konstantinos , Gupta Rangan , Vortelinos Dimitrios I.
Published: August 2022

We study the importance of economic uncertainty so as to predict realized jumps (hereafter jumps) in the pound-dollar exchange rate. The empirical analysis covers the time period from February 1900 to May 2018 on a monthly basis, incorporating several market states, including various booms and crashes. First, we apply a standard linear Granger causality test in order to identify causal effects from economic uncertainty to jumps. We show that the standard linear Granger causality test fails to capture such casual effects. Providing the misspecification of the linear model, we next make use of a nonparametric causality-in-quantiles test. This test allows us to take into account the substantial evidence of nonlinearity along with the structural breaks between economic uncertainty and jumps. In applying this data-driven robust procedure, we find strong evidence of uncertainty causing jumps of the dollar-pound exchange rate. These results are robust over the entire conditional distribution of jumps, exhibiting the strongest impact at the lowest conditional quantiles considered. In addition, our results are generally found to be robust to alternative measures of uncertainty, jumps generated at a daily frequency based on shorter samples of intraday data, and across three other dollar-based exchange rates.
Wert mit Abfall befragen. Eine soziomaterielle Perspektive auf die Erzeugung von Wert mit Einsichten aus ethnographischer Forschung zu Elektroschrott
Authors: Laser Stefan
Published: August 2022

Bewertungen sind an der Hervorbringung sozialer Ordnungen beteiligt. Wenngleich als Leitunterscheidung benannt, wird im Forschungsfeld der Bewertungssoziologie die Unterscheidung von wertvoll und wertlos jedoch häufig übergangen und die Rolle von destruktiven Praktiken unterbeleuchtet; das Feld kann profitieren von den instruktiven, aber disziplinär fragmentierten Beiträgen der Abfallforschung. Der vorliegende Beitrag entwickelt eine soziologische Perspektive, in der Abfälle als werterzeugende Instanzen im Zentrum stehen. Wie können Abfall und Wert in ihrer Relation und im Sinne einer Überschneidung von Sozialität und Materialität näher bestimmt werden? Inwiefern wirken abfallspezifische Praktiken ordnungsstiftend?

Teilnehmende Beobachtungen aus einem Recyclingbetrieb und die Ethnographie einer gescheiterten digitalen Innovation von Google haben die Untersuchung angeregt. Mit den zwei qualitativen Fallstudien wird die Grundunterscheidung von Bewertung und Wertung weiterentwickelt, als fruchtbar erweist sich dabei, eine wirtschaftssoziologisch geläufigen Optik von „Wertschöpfung“ umzustellen auf soziomaterielle Prozesse von „Deformation“ und „Entsorgung“.
Veggie-Renate und Merci-Jens
Authors: Belosevic Milena
Published: August 2022

This paper investigates personal name compounds (PN compounds) with a personal name in the second position and a lexeme or a proper name as a modifier (cf. Veggie-Renate). Based on 1194 types from the web corpus of the Digitales Wörterbuch der Deutschen Sprache (DWDS) and Twitter, the paper aims at testing the following hypotheses from the previous studies (Wildgen 1981, Kürschner 2020): PN compounds are infrequent, irregular and bear mainly an evaluative function. By drawing on the semantic relations holding between the components of nominal compounds in German (cf. Ortner et al. 1991), we provide evidence for 15 regular semantic patterns underlying PN compounds. However, these patterns cannot fully account for the properties of PN compounds as the patterns are too abstract and neglect the contextual factors and extra-linguistic knowledge about the name bearer. Therefore, to arrive at the properties of PN compounds, semantic patterns must be pragmatically enriched in the context by taking into account the linguistic knowledge about the modifier, the linguistic context and knowledge about the name bearer that is not included in the semantic pattern. Furthermore, apart from their evaluative function, PN compounds also evoke knowledge about the name bearer’s appearance, function, occupation, origin or participation in a social event. Finally, the analysis indicates a large frequency of PN compounds in DWDS and Twitter compared to the German Reference Corpus (DeReKo).
Valenzorientierung und Valenzmarkierung in der Sprachgeschichte des Deutschen
Authors: Schäfer Lea
Published: August 2022

Valence orientation is a phenomenon much discussed and debated in typology. Diachronic tendencies of individual languages have so far only been considered en passant in typological approaches such as Comrie (2006). This paper presents a preliminary pilot study on the expression and marking of the causative anticausative alternation in the history of German in a microtypological comparison with data from two other continental West-Germanic varieties, i. e. Dutch and Yiddish. This is intended to highlight possibilities, limitations, and difficulties for a research program of diachronic analysis of a possible language change process of valence orientation and valence marking.
Die Mehrdeutigkeit der Gottgleichheitsaussage in Phil 2,6 und ihr argumentationsstrategisches Potential
Authors: Blumenthal Christian
Published: August 2022

Die vorliegende Untersuchung fragt nach dem argumentationsstrategischen Potential der Mehrdeutigkeit der Gottgleichheitsaussage in Phil 2,6b. Es wird die Annahme durchgespielt, dass Paulus diese Mehrdeutigkeit strategisch in seiner Argumentation in 1,27–2,18 einsetzt und seine Adressaten durch die elliptische Formulierung von 2,5b auf diese Mehrdeutigkeit vorbereitet. Auf inhaltlicher Ebene ist die Mehrdeutigkeit von 2,6 in besonderer Weise geeignet, gleichzeitig zwei Handlungsorientierungen vom Christusereignis her für die Menschen in der Jesusnachfolge grundlegend auszuschließen: Den Menschen „in Christus“ darf es weder zentral um Statusbewahrung noch um Statusverbesserung gehen.
Can the 1-Leg Standing Test Be Replaced by Self-reported Balance in the First-Time Injurious Fall Screening Tool?
Authors: Frisendahl Nathalie , Ek Stina , Rosendahl Erik , Franzén Erika , Boström Anne-Marie , Welmer Anna-Karin
Published: August 2022

Background and Purpose:

The First-time Injurious Fall (FIF) screening tool was created to identify fall risk in community-living older men and women, who may be targets for primary preventive interventions. The FIF tool consists of 3 self-reported questions and 1 physical test (1-leg standing balance). The purpose of this study was to examine the predictive ability of the FIF tool and a modified FIF tool (in which 1-leg standing is replaced by self-reported balance) for first-time injurious falls.

Methods:

A cohort of 1194 community-living people 60 years and older from the Swedish National Study on Aging and Care in Kungsholmen (SNAC-K), Sweden, was followed longitudinally for 5 years. Data on injurious falls were collected from registered data and were defined as receipt of care after a fall. The predictive ability of the FIF tool and the m-FIF tool was explored using Harrell's C statistic, stratified by sex.

Results and Discussion:

The injurious fall rate per 1000 person-years was 54.9 (95% CI: 47.22-63.78) for women and 36.3 (95% CI: 28.84-45.78) for men. The predictive ability for women and men according to Harrell's C statistic was 0.70 and 0.71 for the FIF tool and the m-FIF tool. The predictive ability was 0.70 and 0.69 for 1-leg standing, and 0.65 and 0.60 for self-reported balance problems.

Conclusions:

The m-FIF tool presented similar predictive ability as the FIF tool regarding first-time injurious falls. This finding could extend the usefulness of the tool to other settings, such as to electronic health (eHealth). A quickly and easily administered screening tool can help physical therapists to identify people with a high risk of falling who may need to undergo a more comprehensive fall risk assessment.
Kočner’s Judges
Authors: Sliepková Petra , Pinková Aneta
Published: August 2022

Marián Kočner, a controversial Slovak businessman, alleged to have ordered the killing of a young journalist, Ján Kuciak, in 2018, is now—on account of the investigation of the murder—known to have controlled many judges at different levels of the judiciary, frequently bribing them in exchange for information and favorable verdicts. In this case study, we analyze Kočner’s influence on the Slovak judiciary system through the concept of state capture. State capture, manifested in a substantial overrepresentation of powerful economic interests over the state and its political system, has long been a topic of interest for researchers specialized in post-communist countries. Despite frequent use in academic literature, however, its operationalization remains inconsistent. We propose that four empirical criteria can define state capture: (1) identifying multiple corrupt public actors on the one hand, and a captor exerting some form of decisive influence over them on the other; (2) an illegitimate exchange takes place—that is, the mechanism of capture; (3) the exchange has a beneficial outcome for the captor; and (4) the captor’s influence within the institution is systematic. We argue that in the case of “Kočner’s judges,” all these criteria are fulfilled.
DYNAMIC VIBRATION DAMPERS FOR CONSOLE INSTRUMENTS
Authors:   Odessa Polytechnic National University, Oborskyi H. , Orgiyan A. ,   Odessa Polytechnic National University, Тikhenko V. ,   Odessa Polytechnic National University, Balaniuk A. ,   Odessa Polytechnic National University, Kolesnik V. ,   Odessa Polytechnic National University
Published: August 2022

The maximum efficiency of dynamic vibration dampers (DD) is achieved at optimal values of their parameters. Inertial DD are tuned according to their own frequency and damping, and the optimal values of the absorber parameters depend on the spectral composition of the suppressed oscillations. For nonlinear DD, the optimal values of parameters (for example, gap or precompression) also depend on the intensity of external influences on the object. For multi-element DDs, the number of damper inertial elements should also be optimized. The conditions for optimal tuning of the inertial DD are the conditions of antiresonance. In this work, the tuning of an impact DD with viscous friction has been studied. To determine the optimal value of the gap between the mass of the absorber and its body, a nonlinear problem was solved by the method of point transformations. The influence of deviations from the optimal setting of the shock DD on the amplitude of oscillations is determined. It has been established that small deviations from the optimum cause significant increments in the oscillation range (by 2...5 times), which leads to the need to tune the shock DD with high accuracy. The sensitivity of the vibration damper to the optimization error of its parameters is estimated in the work. In addition, the tuning features of multi-element DDs built into the boring bar for eight types of absorbers were studied with varying their design features. When studying the frequency characteristics, the ratio of the maximum values A0 max/AD max was taken as a measure of efficiency, where A0 max is the oscillation amplitude in the system without a damper. The influence of the diametral clearance and the axial compression force on the efficiency of various types of DDs has been established.
MODELING THE EFFECT OF STOCHASTIC DEFECTS FORMED IN PRODUCTS DURING MACHINING ON THE LOSS OF THEIR FUNCTIONAL DEPENDENCIES
Authors:   Odessa Polytechnic National University, Usov А. , Kunitsyn M. ,   Odessa Polytechnic National University, Klymenko D. ,   Department of the Yuzhnoye State Design Office, Davydiuk V. ,   Military academy (Odessa) for armament
Published: August 2022

The article investigates the influence of hereditary defects formed in the surface layer of products from metals of heterogeneous structure on the quality of surfaces treated with finishing methods. The research is based on an integrated approach based on the results of the deterministic theory of defect development and methods of probability theory. The treated layer of the product is considered as a medium weakened by random defects that do not interact with each other, namely: structural changes, cracks, inclusions, the parameters of which are random variables with known laws of their probability distribution. The causes of structural changes, crack formation on the treated surface product depending on different types of probability distribution of dimensions are investigated: length, depth of defects, and their orientation. From these positions, technological possibilities of their elimination by definition of branch of combinations of the technological parameters providing necessary quality of the processed surfaces are considered. Modeling of thermomechanical processes in the treated surface containing hereditary defects is carried out based on thermoelastic equations with discontinuous boundary conditions in the places of their accumulation. The research used the apparatus of boundary value problems of mathematical physics equations, the method of singular integral equations for solving problems of fracture mechanics, Fourier-Laplace integral transformations for obtaining exact solutions, the method of constructing discontinuous functions. The dependences determining the intensity of stresses in the vertices of hereditary defects are obtained. A method for predicting the nature of crack formation depending on the probability distribution of defects, the values of heat flux entering the surface layer of the processed product has been developed. It is established that the increase in the homogeneity of the material leads to an increase in the value of heat flux, which corresponds to a fixed probability of failure.
APPLICATION OF CAD TECHNOLOGIES FOR RESEARCH OF HEAT EXCHANGE UNITS OF MICROCLIMATE SYSTEMS BASED ON ALTERNATIVE ENERGY SOURCES
Authors:   Odessa Polytechnic National University, Klymchuk O. , Luzhanska G. ,   Odessa Polytechnic National University, Balasanian G. ,   Odessa Polytechnic National University, Serheiev M. ,   Odessa Polytechnic National University, Aksyonova I. ,   Odessa State Academy of Civil Engineering and Architecture
Published: August 2022

. Saving fuel and energy resources is now becoming one of the most important areas of transition of Ukraine's economy to the path of intensive development and rational use of nature. An important direction in the development of modern energy is the development of clean energy based on alternative energy sources for energy supply. One of the ways to solve this problem is to use in microclimate systems for various purposes combined heat supply system, which includes several sources of heat (traditional or renewable), its purpose – to compensate for heat loss through external enclosing structures, supply and exhaust ventilation systems and hot water supply to consumers. Energy accumulation was used to coordinate the modes of heat generation and consumption. A study of the efficiency of battery capacity has been conducted for various connection schemes of heat generators and consumers. With the help of the automated design system the method of efficient operation of the heat accumulator is developed, at research of dynamics of heating of the heat carrier in a tank of the heat accumulator at various schemes of connection. As a result of researches of heat exchange installation by means of the specialized software complex it is received that at cross connection of the generator and the consumer of heat to the accumulator tank, average temperature of heat exchange accumulating material practically coincides with temperature of the return highway that testifies to more uniform temperature field in heat accumulator volume. At the same time, when charging and discharging the heat accumulator, there is a complete coincidence of temperature change graphs for both periods.
THERMAL OPERATING CONDITIONS OF THE HYBRID PHOTOMODULE WITH ANY EXPENSE OF THE HEAT CARRIER
Authors:   Odessa Polytechnic National University, Wysochin V. , Nikulshin V. ,   Odessa Polytechnic National University, Denysova A. ,   Odessa Polytechnic National University
Published: August 2022

Thermal operating conditions of the photomodule considerably define production efficiency of the electric power. Introduction to the photomodule of the device of forced cooling allows to operate the thermal mode. The choice of a way of management of process of cooling and the mode of its realization gives the chance of achievement of a rational combination of electric and thermal performance of the photomodule. In this work analytical researches formation of the temperature field of an absorber of a hybrid solar collector (PVT) when cooling with a variable expense of the heat carrier are conducted. The method of a research allows to analyze characteristics of the PVT collector – temperature of heating of an absorber and cooling liquid depending on external and regime operating conditions of the device. The work purpose – development of a method of calculation of heattechnical operational characteristics of work of a hybrid solar collector in various conditions determined by an expense of the cooling heat carrier. The complex mathematical model of the local analysis of processes of heat exchange of a hybrid solar collector for real conditions of a dynamic solar and climatic situation is used. The analysis of heat exchange in alternative conditions showed that efficiency of transfer of heat in the cooling system of the collector ηТ, otherwise - the ratio of temperature of an absorber and final temperature of the heat carrier, is not a constant and considerably changes under the influence of external and internal factors. It is influenced by intensity of insolation, ambient temperature and an expense of the heat carrier.With growth of these parameters ηТ decreases. The generalizing dependences for determination of temperature of liquid at the exit from the device and the average temperature of an absorber are received at change of an expense of the heat carrier which can be used for assessment of efficiency of transformation of solar energy in electric and thermal in problems of constructive and regime optimization.
REDUCED AIR INJECTION TIME DURING CONTAINMENT TESTING DUE TO THE USE OF AN EJECTOR
Authors:   Odessa Polytechnic National University, Kravchenko V. , Vlasov A. ,   Odessa Polytechnic National University, Andryushchenko A. ,   Odessa Polytechnic National University, Vlasov D. ,   State Professional School “Odessa Professional College of Marine Transport”, Golovchenko A. ,   Odessa Polytechnic National University, Gavrilov P. ,   Odessa Polytechnic National University
Published: August 2022

When testing the tightness of the containment and elements of the accident localization system at the Ukrainian NPP, the "absolute pressure" method is used. Using this method, as a result of measuring air pressure, temperature, and humidity, the Mendeleev-Clapeyron equation determines the mass of air present in the containment. That is, the turn is determined indirectly by determining the change in the mass of air in the containment over time. The tests consist of five stages: vacuuming; air injection, to achieve the required pressure value; parameter stabilization; measurement; pressure relief, and last more than 25 hours. During the tests, no work is carried out in the containment. A necessary condition for testing is to ensure overpressure in the containment. This is done by the operation of the compressor. Given the large volume of containment, this requires a relatively long time, which affects the economic performance of nuclear power plants. In this paper, it is proposed to use an ejector to reduce the time of air injection, the working environment for which is the air after the compressor. The environment for injection is taken from the environment (from the "pure" volume). The article calculates the time of air injection by the compressor to the containment under today’s conditions and when using an ejector. The pressure in the containment changes from 0 to 0.0686 MPa during injection. The ejector outlet pressure is optimized for designing relative to the minimum discharge time. The optimal pressure at the ejector outlet during design is 0.45 bar. It is shown that due to the use of an ejector, the injection time can be reduced by about 30 %.
PREVENTION OF HYDRODYNAMIC INSTABILITY CONDITIONS IN SAFETY SYSTEMS WITH PUMPS OF NUCLEAR POWER PLANTS
Authors:   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kondratyk V. , Skalozubov V. ,   Interagency Center for Fundamental Scientific Research in Energy and Ecology Sector of National Academy of Sciences of Ukraine, Odessa Polytechnic and Ministry of Ecology and Natural Resources of Ukraine, Komarov Ju. ,   Interagency Center for Fundamental Scientific Research in Energy and Ecology Sector of National Academy of Sciences of Ukraine, Odessa Polytechnic and Ministry of Ecology and Natural Resources of Ukraine, Kosenko S. ,   Interagency Center for Fundamental Scientific Research in Energy and Ecology Sector of National Academy of Sciences of Ukraine, Odessa Polytechnic and Ministry of Ecology and Natural Resources of Ukraine, Fedorov D. ,   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
Published: August 2022

The study of hydrodynamic instability in the safety systems of nuclear power plants is relevant. In the deterministic analysis of the safety of nuclear power plants based on accident simulation, it is necessary to take into account the possibility of hydrodynamic instability in the operational and transient modes of safety systems. The consequences of the emergence of hydrodynamic instability in safety systems can be following: a significant deterioration of the heat and mass exchange conditions in the reactor and steam generators during the heating process, an increased power of thermo-hydro-shock on the equipment of the nuclear installation and other negative effects. The negative consequences of the hydrodynamic instability in the safety systems of nuclear power plants can be a significant deterioration in the conditions of heat-mass exchange and the thermal water hammers with increased power. The main reasons for the hydrodynamic instability in safety systems are inertial lag in the response of control valves and head-flow characteristic of pumps to “fast” changes in hydrodynamic parameters in nuclear power plant systems. The purpose of this work is to determine methods for minimizing the impact of the causes of hydrodynamic instability in security systems. The methods of substantiating effective structural and technical parameters of damping devices to prevent conditions of hydrodynamic instability in stationary working and transient modes of safety systems with pumps are given. A method for substantiating effective design and technical parameters of damping devices to prevent conditions of hydrodynamic instability in transient modes of starting pumps of safety systems is presented. Stability conditions in stationary operating modes of the initial steam-gas volume of damping devices are determined. The minimum permissible dimensions of damping devices that meet the conditions of hydrodynamic stability in the transient modes of SB pumps are determined.
ANALYSIS OF TECHNOLOGIES FOR PERSONALIZED CONTENT RECOMMENDATIONS ON THE INTERNET
Authors:   Odessa Polytechnic National University, Lopakov O. , Prokopovych L. ,   Odessa Polytechnic National University, Solodkyi D. ,   Odessa Polytechnic National University
Published: August 2022

The introduction of new technologies in the social information sector of the Internet is primarily due to increasing competition for the attention of users. In order to keep a person’s attention on your social network, you only need constantly to offer interesting, diverse content, and it should be different for different users. To solve these practical problems, technologies for personalized content recommendations are being developed. The relevance of the topic of this article is due to the widespread use on the Internet of personalized content recommendations and the emergence of publications (analytical materials, statistics), which address the shortcomings of these technologies. The purpose of the study is to analyze modern technologies of personalized content recommendations with the identification of positive and negative consequences of their practical application. The paper analyzes the algorithms of content ranking, which are used by various social networks, video hosting and other media resources. Theoretical substantiation of risks connected with creation of “information corridors” is given. The study found that these technologies could facilitate the process of users to search and consume information through recommendations only interesting content; personalization of advertising, facilitation of targeting; reducing the amount of harmful information or traumatic content. At the same time, these technologies lead to negative consequences: problems of censorship; information restrictions, or “information corridors”; influence on concentration and way of thinking. The presence of these problems does not allow calling the current technical achievements in the field under study, the ultimate. However, this applies to any technology that requires not only recognition of their benefits, but also careful analysis of shortcomings in order to timely correct them and establish the principles of responsible use of these technologies.
THERMODYNAMIC MODELING OF OXYGEN DISSOLVATION IN WATER
Authors:   State higher educational institution Ukrainian State Chemical Technology University disabled, Musov O. , Savchenko М. ,   State higher educational institution Ukrainian State Chemical Technology University disabled, Levchuk I. ,   State higher educational institution Ukrainian State Chemical Technology University disabled, Frolova L. ,   State higher educational institution Ukrainian State Chemical Technology University disabled
Published: August 2022

. Traditional methods for determining the solubility of oxygen in water are considered. Their advantages and disadvantages are shown. It is noted that especially great difficulties arise when measuring SO in a real chemical process, where the temperature and components of the system, as well as their ratios change over time. The new method for determining the solubility of oxygen based on thermodynamic calculation of the equilibrium phase and component composition of the oxygen-water system by minimizing the isobaric-isothermal potential of Gibbs using the software package "Selector" is proposed. The model is based on the exact equation of state for calculating the chemical potential of the vapor phase and the chemical potential of the liquid phase. The result is mathematical laws of dissolution of oxygen in water depending on a wide range of temperatures and pressures, which allows significantly facilitating and expanding the range of reliable control of the parameters of chemical-technological processes. The thermodynamic model allows calculations to be performed both in pure water and in acid and salt solutions, as well as taking into account the vapor phase and without it. The equation of Henry’s constant is given 2 1 X P A B T C T DT = ++ + 0.0181 exp( ln( ) ) for oxygen and air from temperatures in the range of 273...373 K and pressures up to 10 atm., which allows determining any intermediate values. To do this, it is necessary to substitute in the equation the current data of temperature and pressure, which are easily measurable. It is shown that within these ranges the deviation from the experimental values is minimal ∼1%, which allows using of the presented equations in technological calculations. The value of the temperature, at which the minimum solubility of oxygen is being observed, for pure oxygen is determined Tmin = 370.5K, for air Tmin = 370.3 K., the value of enthalpy changes sign.
METHOD OF ANALYSIS OF HIERARCHIES IN DECISION MAKING IN MEDICINE
Authors:   Odessa Polytechnic National University, Manicheva N. , Titova N. ,   Odessa Polytechnic National University, Prokopovych I. ,   Odessa Polytechnic National University, Kasian S. ,   Odessa Polytechnic National University
Published: August 2022

In everyday practice, health professionals face many challenges in making ethical and professional decisions. So far, little is known about ethical and professional reasoning and weighing the benefits and risks in the daily practice of complementary and alternative medicine. Along with the development of meta-analysis as a tool for summarizing research and scientific literature, there has been renewed interest in broader forms of quantitative analysis, which aims to combine evidence from different research plans or evidence from several parameters. They have been proposed under different headings: the trust profile method, cross-synthesis, hierarchical analysis models, and generalized evidence synthesis. The models used to evaluate health technologies are also called the synthesis of evidence in mathematical structure. The issues of the studied topic are quite relevant, because making difficult and “correct” decisions in the medical industry is quite acute on the agenda due to the constant emergence of new diseases or mutations in already known infections. Therefore, scientists are constantly improving their work, skills and knowledge in all areas. The process of analytical hierarchy, one of the most useful multicriteria methods of decision-making. It can allow doctors, patients themselves, and people who do not go to the medical institution, but choose the path of selfmedication to explain their condition to the pharmacist in more detail to avoid even worse problems and serious conditions. He makes decisions by structuring the hierarchical elements of decisions and weighing criteria involved in the decision-making problem. To choose the best prevention policy to reduce the incidence of any disease. In this article we will consider the feasibility and effectiveness of using the method of hierarchical analysis in decision-making for the treatment and improvement of the patient, as well as summarize the quantitative and qualitative indicators of the effectiveness of this method.
IMPROVEMENT OF METHODS FOR DIAGNOSING AN OIL-FILLED HIGH-VOLTAGE COUPLING CAPACITOR
Authors:   Odessa Polytechnic National University, Zaitsev S. , Chichenin V. ,   Odessa Polytechnic National University, Sushchinskaya S. ,   Odessa Polytechnic National University, Тikhenko V. ,   Odessa Polytechnic National University, Mironyuk P. ,   Separate subdivision «Southern Electric Power System» of the private joint-stock company «National Energy Company «Ukrenergo»
Published: August 2022

Oil-filled high-voltage capacitors are used in high-frequency electrical communication systems, the reliability of which is highly demanding. The article is devoted to the improvement of procedures for diagnosing an oil-filled high-voltage coupling capacitor by using methods of gas chromatographic determination of the content of dissolved diagnostic gases in mineral condenser oils. The aim of the work is to increase the reliability of the technical diagnostics results of electric capacitor communication type SMA-166V3- 14UHL1 to monitor its technical condition, determine the location and causes of failure, predict technical condition and clarify the possibility of maintenance and repair. The following studies were performed: electrical characteristics and thermal field characteristics of the communication capacitor; properties of condenser oil after disassembly of the condenser. The following parameters are determined: for the coupling capacitor - the tangent of the dielectric loss angle, electric capacitance and its changes, electrical resistance; for condenser oil - electric breakdown voltage, dielectric loss tangent, flash point in a closed crucible, density, moisture content, acid number, presence of mechanical impurities, hydrogen solubility, dissolved diagnostic gases content, antioxidant additive and furan compounds. The obtained results allow to increase the reliability of the results of diagnosing the technical condition of oil-filled electric capacitors in connection with the use of traditional and additional methods of diagnosing high-voltage electrical equipment filled with mineral oils.
SIMULATION MODELLING IN THE TASKS OF DIGITAL ENGINEERING IN THE CREATION OF INFORMATION-MEASURING SYSTEMS
Authors:   Odessa Polytechnic National University, Oborskyi H. , Gugnin V. ,   Odessa Polytechnic National University, Perperi L. ,   Odessa Polytechnic National University, Goloborodko G. ,   Odessa Polytechnic National University, Goloborodko V. ,   Odessa Polytechnic National University
Published: August 2022

The object of this study is virtual measuring systems for shape deviation parameters. The article describes the designed virtual instrument for simulating the process of determining the parameters of the shape deviation of cylindrical shafts. To implement this task, a model for calculating the parameters of the deviation of the shape of the shafts is proposed, which takes into account the effect of random real diameters of the parts processed on metal cutting equipment on their geometric accuracy. The process of modelling the measurement of shaft shape deviation parameters is carried out in two stages. At the first stage, the movement of the plungers of the device to the surface of the shaft and the sound of the drive of the plungers are simulated. At the second stage, the parameters of the shape deviation of the cylindrical shafts are calculated. The shape of the cylindrical part depends on the random values of the actual diameters of the shaft in various intersections of the cylindrical part with planes. To obtain estimated values of shaft diameters in different cross-sections of the shaft by planes, an algorithm for calculating the current position of the profile point of the outer surface of the shaft has been developed. Because of the influence of physical cutting processes, the location of points on the surface of the shaft is random. Therefore, the position of the calculation point is determined by superimposing on the theoretical profile of the shaft a random variable, which is generated according to the law of equal probability. The method of processing the array of profile points coordinates to obtain numerical parameters of shaft shape deviation, such as taper, barrel, bow and ovality, is described.
Classification of Children and Adolescents With Avoidant/Restrictive Food Intake Disorder
Authors: Katzman Debra K. , Guimond Tim , Spettigue Wendy , Agostino Holly , Couturier Jennifer , Norris Mark L.
Published: August 2022

BACKGROUND AND OBJECTIVES

Evidence suggests that children and adolescents with avoidant/restrictive food intake disorder (ARFID) have heterogeneous clinical presentations. To use latent class analysis (LCA) and determine the frequency of various classes in pediatric patients with ARFID drawn from a 2-year surveillance study.

METHODS

Cases were ascertained using the Canadian Pediatric Surveillance Program methodology from January 1, 2016, to December 31, 2017. An exploratory LCA was undertaken with latent class models ranging from 1 to 5 classes.

RESULTS

Based on fit statistics and class interpretability, a 3-class model had the best fit: Acute Medical (AM), Lack of Appetite (LOA), and Sensory (S). The probability of being classified as AM, LOA, and S was 52%, 40.7%, and 6.9%, respectively. The AM class was distinct for increased likelihood of weight loss (92%), a shorter length of illness (<12 months) (66%), medical hospitalization (56%), and heart rate <60 beats per minute (31%). The LOA class was distinct for failure to gain weight (97%) and faltering growth (68%). The S class was distinct for avoiding certain foods (100%) and refusing to eat because of sensory characteristics of the food (100%). Using posterior probability assignments, a mixed group AM/LOA (n = 30; 14.5%) had characteristics of both AM and LOA classes.

CONCLUSIONS

This LCA suggests that ARFID is a heterogeneous diagnosis with 3 distinct classes corresponding to the 3 subtypes described in the literature: AM, LOA, and S. The AM/LOA group had a mixed clinical presentation. Clinicians need to be aware of these different ARFID presentations because clinical and treatment needs will vary.
МЕТОДОЛОГІЧНІ МЕТАМОРФОЗИ СУЧАСНОЇ ФІЛОСОФІЇ: «НОВА ОНТОЛОГІЯ» БУТТЯ
Authors: Brodetskaya Yuliya Yuliya
Published: August 2022

Розглядаються проблеми методологічної реконструкції, що відбуваються в рамках сучасної філософської теорії. Зазначається, що трансформаційні вектори, в рамках останньої набули характеру поворотів: онтологічний, лінгвістичний, іконічний, теологічний, перформативний, медіальний, антропологічний, риторичний, наративний, просторовий. Кожен з них вносить свої зміни та корективи в формат класичної філософської парадигми, що й спричиняють зрушення не лише в рамках методології останньої, але перш за все, у свідомості сучасної людини, культурі сучасного суспільства. Проте витоком таких трансформацій стають зміни саме в онтологічній платформі класичної філософської. Саме онтологічний поворот стає фундаментальним підґрунтям зміни картини світу, методології, з урахуванням якої розгортаються й інші повороти. Автор фокусує увагу на тому, що ідея повороту стає черговою історичною спробою змінити методологічні орієнтири філософського знання, саме тому періодично заклики до «повороту» з’являються в рамках філософських теорій (наприклад, «назад до природи», «назад до Канта», «до Фрейда», «до самих речей», «до досократиків», «до міфу»). Проте саме «онтологічний поворот» закладений спробами М.Хайдеггера відбудувати «фундаментальну онтологію буття», стає умовою якісної зміни методологічного апарату сучасної філософії.
СВІДОМІСТЬ І НІЩО У ЕКЗИСТЕНЦІЙНОМУ ВЧЕННІ РАННЬОГО М.ГАЙДЕҐҐЕРА
Authors: Okorokov Viktor
Published: August 2022

Показано, що Гайдеґґер як екзистенціальний мислитель шукав природу буття не тільки виходячи з горизонту часу («Буття та час»), але і з горизонту інших подій (мислення, Ніщо, божественності та ін.). Фактично, Гайдеґґер, розробляючи фундаментальну онтологію, дає онтологічне тлумачення прадавньому прокльону європейської культури, яке полягає у тому, що між метафізичним знанням про буття й природнім знанням про світ є фундаментальне протиріччя. Спираючись на ідеї Я.Бьоме й М.Бердяєва, можна зробити висновок, що Ніщо у концепції Гайдеґґера схоже на найглибшу поверхню, куди скачується всяке буття, або, мовою Мінковського-Ейнштейна, горизонт подій, у якому сходяться одночасно і простір, і час і далі здійснюється перехід у часу-подібний світ. Ми, фактично, разом з Гайдеґґером попадаємо в зону наявності буття-ніщо, людино-бога, у якому анулюються всі протилежності й у якому можна виявити даоське Дао. Але якщо у Лао Цзи порожнеча передує наявності й у Ж.-П.Сартра «ніщо» передує буттю, то в Гайдеґґера проблема приналежності не прояснена, оскільки там, де буття співпричетне Ніщо, там же мислення стикається з буттям, а буття є розуміючим, у цьому топосі і людина порівняна з Богами. Чи не виявиться у такому випадку відкриттям, що Гайдеґґер добре розумів не тільки європейську, але і східні філософські системи і запозичив деякі ідеї у східній традиції. Там, де європейське мислення закрило горизонт подій буттям Парменіда (і схоже неадекватно інтерпретувало його), там Гайдеґґер, а у подальшому Ж.-П.Сартр і А.Бадью, виявили горизонт небуття (порожнечі й ніщо) і показали причетність нашого мислення до обох горизонтів. Мислення може виявити себе як у бутті, так і у Ніщо, і з урахуванням східного досвіду поки не ясно, у якому із цих горизонтів воно відкриває себе істинним чином.
КОНЦЕПЦІЯ «ФАМІЛІСТИЧНОГО АПРІОРИЗМУ»: ФІЛОСОФСЬКО-КУЛЬТУРОЛОГІЧНИЙ ВИМІР
Authors: Shatalovych Oleksandr M. , Shatalovych Inna V.
Published: August 2022

Розглядається питання апріорного характеру фамілістичних інтуїцій у філософсько-культурологічному вимірі. Спираючись на різноманіття концепцій апріорі та пом’якшення суто поза емпіричного розуміння апріоризму, запропоновано доповнити вчення про апріорні форми пізнання «сімейним» виміром (фамілістичні інтуїції шлюбного з’єднання, породження, споріднення), для фіксування якого висунуто термін «фамілістичний апріоризм». Його суть полягає в тому, що кожна людина сприймає світ через апріорні фамілістичні форми (апріорну «логіку» сім’ї) і відтворює їх у власних оцінках і вчинках. Обґрунтування концепції «фамілістичного апріоризму» здійснено у понятійно-термінологічному, онто-гносеологічному, ціннісно-особистісному та історико-культурологічному аспектах. В історії культури сімейність постає як універсальний мовний фрейм, «сімейна» мова, терміни якої об’єднують різні сфери буття і слугують символічному вираженню світу.
АФРИКАНСЬКИЙ ВЕКТОР ЗОВНІШНЬОЇ ПОЛІТИКИ КИТАЮ: ТРАДИЦІЇ ТА СУЧАСНІСТЬ
Authors: Perminov Volodymyr Olexandrovich , Chihira Alina Stanislavivna
Published: August 2022

Розглядаються питання реалізації зовнішньополітичної стратегії Китаю на африканському континенті. Досліджується основні аспекти гуманітарного та військового співробітництва. Проаналізовані перспективи впливу розширення китайсько-африканської співпраці на трансформацію світоустрою в цілому.