bluuebunny/crossref_metadata_2025 huggingface dataset:
Severe pulmonary complications after cytoreductive surgery and hyperthermic intraperitoneal chemotherapy are common and contribute to decreased overall survival
Authors: Sand Olivia , Andersson Mikael , Arakelian Erebouni , Cashin Peter , Semenas Egidijus , Graf Wilhelm
Published: December 2021

Background and objectives

Extensive abdominal surgery is associated with the risk of postoperative pulmonary complications. This study aims to explore the incidence and risk factors for developing postoperative pulmonary complications after cytoreductive surgery and hyperthermic intraperitoneal chemotherapy and to analyze how these complications affect overall survival.

Methods

Data were collected on 417 patients undergoing surgery between 2007 and2017 at Uppsala University Hospital, Sweden. Postoperative pulmonary complications were graded according to the Clavien-Dindo classification system where Grade ≥ 3 was considered a severe complication. A logistic regression analysis was used to analyze risk factors for postoperative pulmonary complications and a Cox proportional hazards model to assess impact on survival.

Results

Seventy-two patients (17%) developed severe postoperative pulmonary complications. Risk factors were full thickness diaphragmatic injury and/or diaphragmatic resection [OR 5.393, 95% CI 2.924–9.948, p = < 0.001]. Severe postoperative pulmonary complications, in combination with non-pulmonary complications, contributed to decreased overall survival [HR 2.285, 95% CI 1.232–4.241, p = 0.009].

Conclusions

Severe postoperative pulmonary complications were common and contributed to decreased overall survival. Full thickness diaphragmatic injury and/or diaphragmatic resection were the main risk factors. This finding emphasizes the need for further research on the mechanisms behind pulmonary complications and their association with mortality.
Development of hepatocellular carcinoma from various phases of chronic hepatitis B virus infection
Authors: Suzuki Takanori , Matsuura Kentaro , Nagura Yoshihito , Iio Etsuko , Ogawa Shintaro , Fujiwara Kei , Nojiri Shunsuke , Kataoka Hiromi , Tanaka Yasuhito
Published: December 2021

Background & aims

There is insufficient data on the clinical course of chronic hepatitis B (CHB) patients in the immune-tolerant (IT) and immune-clearance, inactive (IC) phases over a long follow-up period.

Design

We enrolled 466 CHB patients from our historical cohort, including 56 IT+MA　 (mildly active), 134 IC, 230 with chronic active hepatitis (CH) and 46 with liver cirrhosis (LC), who were categorized to each phase by at least one year of follow-up period from the first visit to our hospital. We investigated long-term risks, and their factors, of developing hepatocellular carcinoma (HCC), and the transition between the clinical phases, especially in the IT+MA and IC groups.

Results

Of the 56 patients in the IT+MA group, 27 remained the IT+MA phase, but 29 transitioned to the CH phase and started nucleot(s)ide analogue (NA) treatment during the follow-up period. Meanwhile, of the 134 patients in the IC group, only 5 started NA treatment after progressing to the CH phase. The development of HCC from the IT+MA, IC, CH, and LC groups was observed in 2, 2, 9, and 20 cases, respectively. The cumulative incidence rates of developing HCC in the IT+MA, IC, CH, and LC groups were 9.9, 1.8, 3.0, and 53.1% at 10 years. In the CH and LC group, patients who developed HCC were older, had higher levels of FIB-4 index, M2BPGi, HBcrAg and AFP, and had lower levels of albumin and platelet counts. In CH patients, FIB-4 index levels were elevated at the diagnosis of HCC compared to baseline, whereas these decreased during the follow-up period in non-HCC patients.

Conclusions

HCC occurred at a certain rate among patients in the IT+MA and IC groups. Careful follow-up is required for CH patients with higher levels of FIB-4 index and/or M2BPGi because of the high incidence of HCC development. (299 words)
The deep, sometimes wild, subjectivities of practice…
Authors: D’Arcy Eamon
Published: December 2021

In recent decades, there has been considerable interdisciplinary debate around the theories of scenography, but less so around the practices of scenography. This article revisits scenography to reposition it as a contemporary design discipline, with a reminder that its history is embedded in the traditions of art theory and philosophy. Using Isabelle Stengers’ ‘Introductory notes on an ecology of practices’ as an opportunity to rethink the practice of scenography, a project is revisited, under the rubric ‘design fiction’. This project ‘Burying the Narrative’ is presented as a source of conceptual and theoretical encounter as several objects are buried under the ground. This was a tactic to deliberately disassociate scenography from traditional conventions and methodologies. Design practice is considered an integral part of the ecosystem of theatre and performance, and certainly in the early stages of a project, clever manoeuvres give rise to creative speculations.
The state of Australian performance design: A roundtable discussion on scenographic practice, education and research through the lens of the Prague Quadrennial
Authors: Rixon Tessa , Taylor Madeline , Briscoe Jo , Burke Rachel , McKeague M’ck , Osmond Suzanne , Roberts Richard , Tregloan Anna
Published: December 2021

As the Prague Quadrennial of Performance Design and Space 2019 (PQ19) drew to a close, Australian designers, researchers and educators gathered to discuss the impact of PQ on our scenographic communities while querying the evolutions and challenges facing design practice. Australia’s vast geography made this event a unique opportunity to bring together leading experts from multiple states and capture contemporary perspectives. At the midpoint between the 2019 and 2023 gatherings – a time of global pandemics, political unrest and educational transformation – this article offers the outcomes of this roundtable as a unique snapshot of the state of design practice within Australia through the lens of the Quadrennial. The roundtable was themed around Australia’s presence at PQ19, the effects of PQ19 on those present and the ripples to be felt by those at home, and what attendance illuminated about current developments and concerns in practice, teaching and research. Led by practitioner-researchers Tessa Rixon and Madeline Taylor, the roundtable featured both the curators of Australia’s country and student exhibits; award-winning set, costume and lighting designers with diverse experiences from national opera to independent theatre; and educators and researchers from the nation’s top universities. The resulting discussion presents a unique perspective on the gaps and weaknesses in the design education, practice and research; first-hand insights on the challenges and opportunities available in both exhibiting and participating in the PQ; and the need to actively promote and privilege diverse voices and a multiplicity of representations in the process of claiming a ‘national’ scenographic identity. The roundtable was the first to capture multiple expert first-person Australian perspectives on the PQ while simultaneously contributing to the ongoing international discussion of performance design through the lens of artists, educators and researchers.
Fidelidad, libre adaptación, recreación. Itinerarios del teatro italiano en la españa del siglo XVIII (1735-1808): notas sobre recepción y traducción
Authors: Quinziano Franco
Published: December 2021

El siglo XVIII fue testigo de la significativa presencia y recepción que exhibieron dos autores claves en el campo teatral, Metastasio y Goldoni, cuyas obras gozaron de gran popularidad en los escenarios españoles. En torno a estos dos dramaturgos se concitó una intensa labor traductora que fue configurando un notable repertorio de piezas –traducidas, adaptadas y arregladas– del que se nutrieron el drama musical y el teatro cómico en España. Significativa fue la aportación del caudal de textos teatrales italianos para la formación de un renovado repertorio en las carteleras españolas, amoldados a los gustos del público y a múltiples subgéneros dramáticos. En el estudio se abordan el horizonte de la recepción del drama italiano y algunos itinerarios por los que transitaron las versiones españolas, procedentes en especial de ambos autores, a partir de mediados de los años 30 del siglo, cuando el drama metastasiano ingresa en la península. Una parcela relevante de estas versiones en español evidencia modalidades y trayectos complejos y sinuosos en su proceso de adaptación, al tiempo que exhiben diversos niveles de interconexión y de interdependencia, directa e indirecta, tanto entre sí como respecto al texto original italiano del que han bebido.
Antonio Gregorio Rosell y Viciano (ca. 1748-1829): instituciones matemáticas (1785)
Authors: Español González Luis , Manterola Zabala Juncal
Published: December 2021

La Imprenta Real publicó en 1785 Instituciones Matemáticas de Antonio Rosell, catedrático desde enero de 1772 en los Reales Estudios de San Isidro en Madrid. El autor anunció dos volúmenes, el primero contiene la aritmética numérica y los principios del álgebra, pero el segundo quedó inédito. Rosell afirma que quiere escribir un «texto de matemática pura» dirigido a «matemáticos de profesión». Presentamos una descripción detallada del libro, precedida por indicaciones biográficas sobre el autor y aspectos generales de la obra citada.
Un género olvidado: los manuales de comerciantes en la ilustración temprana española (1699-1760)
Authors: Astigarraga Goenaga Jesús
Published: December 2021

Este trabajo reconstruye las líneas genealógicas principales de los manuales de comercio de la Ilustración española temprana. En él se muestra que España realizó una notable contribución, frecuentemente olvidada, a este movimiento internacional de la cultura impresa. El trabajo analiza los principales manuales de comerciantes de la época y revisa el legado depositado en el siglo XVIII por los tratados de aritmética comercial de las dos centurias previas –en particular, de los concebidos en el Reino de Castilla y la Corona de Aragón–. También estudia la pluralidad de formatos que se dieron cita bajo el título de «manuales de comerciantes» (libros de cuentas, tratados de sobre el arte de metales, etc.). En términos generales, puede afirmarse que este tipo de libros reunió una colección de conocimientos en matemáticas y en economía poco original y muy rudimentaria. Sin embargo, más allá de la historia intelectual, tuvieron una significación social y cultural muy notable y proliferaron debido a que en una Monarquía como la española no existían alternativas claras a ellos capaces de cubrir diferentes funciones culturales, sociales y profesionales, más allá de las estrictamente educativas.
La iglesia de la villa de Ontígola (Toledo), vecina del Real Sitio de Aranjuez
Authors: De Mingo Lorente Adolfo
Published: December 2021

Este artículo repasa la evolución de la iglesia de Ontígola y su relación con Aranjuez, que a mediados del siglo XVIII financió sus obras con cargo a los materiales empleados para la reconstrucción del Real Sitio tras el grave incendio de 1748. Reconocida por Santiago Bonavia un año más tarde, la nueva iglesia de la Purísima Concepción sería finalmente construida por el alarife Florencio Rodríguez del Castillo, según recoge el expediente conservado en el Archivo General de Palacio. Cerrado por amenaza de ruina en 2004 y parcialmente demolido después, el edificio comenzó a ser restaurado a comienzos de 2020.
Molde barroco y sensibilidad dieciochesca: la novela los trabajos de narciso y filomela (1784), de Vicente Martínez Colomer
Authors: Muñoz de Morales Galiana Javier
Published: December 2021

Martínez Colomer compuso en 1784 su novela Los trabajos de Narciso y Filomela, aunque permaneció inédita hasta el año 2000. Por este motivo, apenas ha sido estudiada, y los trabajos existentes la vinculan sobre todo con el Persiles de Cervantes, obra de la que es imitación. No obstante, el presente trabajo se propone analizar esta novela atendiendo ya no solo a sus similitudes con el texto cervantino, sino a sus principales diferencias y peculiaridades. Demostramos, de este modo, que del Persiles únicamente toma lo más general, y a partir de ahí desarrolla una historia dotada de una sensibilidad típicamente dieciochesca.
In methodum fluxionum
Authors: Ausejo Elena
Published: December 2021

In Methodum Fluxionum es un manuscrito anónimo del siglo XVIII que se conserva en la llamada Biblioteca de Cortes de la Real Academia de la Historia, una colección que contiene una importante cantidad de manuscritos matemáticos procedentes del Colegio Imperial regentado por los jesuitas. La primera mitad del texto es una introducción que trata de la composición de fuerzas, de la caída de los graves y de las potencias y sus índices. La mitad restante del manuscrito está dedicada al algoritmo de las fluxiones y su aplicación al trazado de tangentes a curvas y a la determinación de máximos y mínimos. Este trabajo presenta el análisis de contenidos y la transcripción del texto que han resultado en la identificación de la fuente impresa que el manuscrito traduce fielmente del inglés al latín, esto es, las treinta y cuatro primeras páginas del tratado titulado The method of fluxions applied to a select number of useful problems de Nicholas Saunderson (1682-1739).
Unidades de Conservação e sua efetividade na proteção dos recursos hídricos na Bacia do Rio Araguaia
Authors: Assis Pâmela Camila , Faria Karla Maria Silva , Bayer Maximiliano
Published: December 2021

A bacia hidrográfica do rio Araguaia corresponde a 4,53% do território brasileiro e é alvo de intenso processo de ocupação e de impactos ambientais que comprometem a sua integridade socioambiental. Dentre as diversas estratégias de conservação e preservação ambiental instituídas pelas políticas ambientais brasileiras, as unidades de conservação podem auxiliar nas estratégias de gestão territorial e ambiental das bacias hidrográficas para a preservação dos recursos naturais do país. O objetivo deste artigo é justamente compreender o contexto de criação, quantidade, distribuição e a efetividade das unidades de conservação dentro da bacia hidrográfica do rio Araguaia. Foi possível identificar 49 unidades de conservação na bacia, o que representa apenas 9,42% do seu território, as quais foram organizadas por Categoria de UCs (Proteção Integral ou Uso Sustentável), Área (ha), Decreto/Lei de criação, presença ou não de Conselho Gestor e Plano de Manejo, Municípios que compreendem a unidades de conservação e a Instância Responsável de administração e gestão (Federal, Estadual e Municipal). Constatou-se, portanto, que as UCs não estão distribuídas de forma uniforme na área da bacia, sendo que não há proteção – em qualquer categoria de unidade de conservação – de nenhuma das nascentes dos principais afluentes do rio Araguaia. Em vista disso, a efetividade das áreas encontra-se comprometida pela ausência de instrumentos de gestão e recorrência histórica de desmatamentos e de incêndios.
Watermelon Sorting Process by Frequency Identification and Artificial Neural Network
Authors: Wongkalasin Komsan , Upachaban Teerapon , Daosawang Wacharawish , Pannucharoenwong Nattadon , Ratanadecho Phadungsak
Published: December 2021

This research aims to enhance the watermelon’s quality selection process, which was traditionally conducted by knocking the watermelon fruit and sort out by the sound’s character. The proposed method in this research is generating the sound spectrum through the watermelon and then analyzes the response signal’s frequency and the amplitude by Fast Fourier Transform (FFT). Then the obtained data were used to train and verify the neural network processor. The result shows that, the frequencies of 129 and 172 Hz were suit to be used in the comparison. Thirty watermelons, which were randomly selected from the orchard, were used to create a data set, and then were cut to manually check and match to the fruits’ quality. The 129 Hz frequency gave the response ranging from 13.57 and above in 3 groups of watermelons quality, including, not fully ripened, fully ripened, and close to rotten watermelons. When the 172 Hz gave the response between 11.11–12.72 in not fully ripened watermelons and those of 13.00 or more in the group of close to rotten and hollow watermelons. The response was then used as a training condition for the artificial neural network processor of the sorting machine prototype. The verification results provided a reasonable prediction of the ripeness level of watermelon and can be used as a pilot prototype to improve the efficiency of the tools to obtain a modern-watermelon quality selection tool, which could enhance the competitiveness of the local farmers on the product quality control.
COMPARATIVE ANALYSIS OF METHODS FOR DETERMINING THE MASS OF THE SHAFT OF A SPORTS AND AEROBATIC AIRCRAFT, MADE OF TITANIUM AND COMPOSITE MATERIAL
Authors: Avdukhina T. M. , Druzhinin T. S.
Published: December 2021

Comparative analysis of an acrobatic aircraft's weight and shaft which is made of a titanium alloy and composite materials. The article contained requirements and specificities of an acrobatic aircraft's landing gear shaft design. The article describes prediction method of an acrobatic aircraft’s weight fraction of shaft which is allows to take into account shaft mass on wing loading upon condition that composite materials will be used in construction. Research objectives include: –Documentation of an acrobatic aircraft’s shaft design. – Analytic dependence conclusions on shaft mass by applying energy absorption of landing impact. – To quantify the algorithm of shaft mass based on strength prediction of shaft construction. –To quantify the mass and construction of shaft based on patterns that are made of titanium and composite materials. – Comparative analysis and references to practical using these methods to quantify shaft’s mass. –To quantify how shaft mass influenced by wing loading. –Designing shaft construction that is made of titanium alloy VT22 and composite material VKU26 by taking into account quantity and ply layup. Comparative analysis shaft mass which is made by different variety of composite materials. The constructive analysis is distinguished for decreasing the shaft mass that is made by composite material and references on ply layup.
RESEARCH AND COMPUTER DESIGN LIGHTING INSTALLATIONS WITH LED LIGHTING DEVICES
Authors: Bayneva I. I. , Shkarin V. I.
Published: December 2021

The article discusses the main issues of energy conservation in lighting in the face of a growing shortage of energy resources. Estimated reserves of energy savings in lighting. The urgent tasks of designing modern lighting make it possible to identify the most efficient light sources and lighting devices, ways to ensure energy and lighting savings, and ways to increase the energy efficiency of an industrial plant lighting system. The basic provisions for the use of LED lighting devices for lighting industrial premises are given. The requirements for artificial production lighting, regulated by various regulatory documents, are considered. The possibilities of DiaLux program for lighting modeling are analyzed. Lighting projects have been developed for various sections of the galvanic shop with LED lights in DIALux. A comparative analysis of the energy efficiency of indoor lighting projects using LED and fluorescent lamps demonstrates the obvious use of LED lighting devices for lighting industrial premises.
PUMPING STATION AND STAMPING MACHINE FOR THE PRODUCTION OF RADIATION SOURCES
Authors: Mikaeva S. A. , Mikaeva A. S. , Dyukin A. A.
Published: December 2021

The article describes a five-lamp pumping station and a semi-automatic stamping machine for the production of bactericidal ultraviolet lamps. Standard methods of production and testing of pumping stations and stamping machines were analyzed. In the course of work and on the basis of the conducted research, the technical characteristics and equipment configuration were worked out. The pumping station is designed for processing simultaneously five products that will later be bactericidal ultraviolet lamps, including: decontamination of products, oxidation of electrodes, filling products with a gas mixture to the working pressure, loading amalgam and desoldering. This equipment ensures the fulfillment of the production volume for the production of bactericidal lamps. When designing and manufacturing electrical equipment, components from the world's leading manufacturers are used. The use of high-quality materials can significantly increase the efficiency of equipment operation. The latest technical solutions combined with a well-thought-out design make it possible to successfully integrate this equipment into integrated automated control systems.
DETERMINATION OF THE REPULSIVE FORCE OF A THICK HIGH-COERCIVE PERMANENT MAGNETS IN THE AXIAL BEARING OF A VERTICAL PUMP
Authors: Krasil’nikov A. Ya. , Krasil’nikov A. A.
Published: December 2021

The article considers the possibility of applying a standard method for calculating the repulsive force for a thick high-coercive permanent magnets from samarium-cobalt alloy in a magnetic system. The results of the research allowed us to introduce correction coefficients in the method of calculating the repulsive force in a magnetic system with such magnets, depending on the air gap between of them. It is shown that the repulsive forces of the North poles of permanent magnets differ from the repulsive forces of the South poles. The research was carried out with magnets manufactured by different enterprises. When calculating the repulsive force, the average value of the repulsive force between the North and South poles of magnets is found.
ABOUT THE CREATION OF AN LED LIGHT SOURCE WITH VARIABLE COLOR TEMPERATURE
Authors: Nesterkina N. P. , Kuznetsov E. A. , Zhuravleva Yu. A.
Published: December 2021

The article is devoted to the development and research of an LED lamp of the A65 form factor and the type of E27 base with a choice of color temperature when the lamp is alternately connected to the supply network. The description of LEDs, driver, radiator, housing, base is given. Analysis of the results of measurements of lighting characteristics showed that the luminous flux and power consumption of the LED lamp amounted to 1004.1 lm and 12.5 W at a measured color temperature of 3056 K and 1059.8 lm and 12.37 W at 4120 K. Change in the color temperature of the lamp from 3056 K to 4120 K is characterized by an increase in the spectral density in the region of short-wave radiation with an increase in the proportion of blue, blue and violet colors. The shape of the lamp luminous intensity curve is close to the diffuse distribution. The change in color temperature is carried out by turning off and then turning on the lamp in the mains for no more than 5 seconds.
MODELING OF THE GRINDING PROCESS BY MICRO-CUTTING SINGLE ABRASIVE GRAINS. PART 3. FORMATION OF RIS-GROOVES
Authors: Zubarev Yu. M. , Priemyshev A. V.
Published: December 2021

When grinding on the processed surface of the workpieces of machine parts, a set of RIS-grooves is formed from the action of the vertices of the cutting abrasive grains of the circle. These risks mainly determine the roughness parameters of the treated surface and its physical and mechanical properties. The article presents the results of research of the micro-cutting process of different steels with different abrasive grains in a wide range of cutting speeds. It is shown that increasing the cutting speed during grinding has a positive effect on improving the metal quality of the surface layer of parts.
ENERGY EFFICIENT LIGHTING OF PUBLIC PREMISES
Authors: Kuznetsov E. A. , Nesterkina N. P. , Zhuravleva Yu. A. , Mikaeva S. A.
Published: December 2021

The article provides a technical and economic comparison of costs when covering 10 classrooms of a general educational institution with LED and fluorescent lamps for a period of 10 years. The main advantage of led light sources is the high level of light output compared to traditional light sources. Replacing incandescent lamps and gas-discharge ICS with led ICS can significantly reduce energy costs. Currently, led ICS are increasingly replacing traditional ICS due to their high energy efficiency and safety. For comparison, luminescent lamps LVO04-4x14-031 and LED lamps DVO12-45-003 produced by JSC “Ardatovsky lighting plant” with a comparable light flux and light distribution were selected. The number of lamps in the 65 m2 auditorium was chosen based on the normalized illumination of 500 Lux on a horizontal work surface (0.8 m). The calculation of the number of lamps that meet all the requirements for lighting in General and higher educational institutions was carried out in the DiaLux 4.13 program. According to preliminary calculations, lighting with led lamps will reduce energy costs over 10 years by 2.16 times compared to fluorescent lamps. The maximum expenses are spent on the purchase of new led lamps. This is mainly due to the higher price of led lighting devices compared to fluorescent ones.
MATHEMATICAL MODELING OF THE PROCESS OF POSSIBLE DAMAGE TO NPP PIPELINES DUE TO THEIER LOCAL EROSION AND CORROSION SINKING
Authors: Gusarov A. E. , Sergeeva L. V.
Published: December 2021

The article is devoted to computer modeling of the process of possible damage to the pipelines of nuclear power plants that received local thinning of the walls.The geometric features of pipelines are essential not only for assessing the intensity of erosion and corrosion of a metal, but also for the final strength assessment, in particular, when calculating local thinning of the walls of pipelines. The accuracy of forecasts of the life of pipeline structures directly depends on the ability to evaluate the strength of pipeline elements that have received local thinning, especially if these elements themselves have a complex shape. Such elements include elbows, nozzles, adapters (transitions), shells. All of these elements are thin-walled structures of complex shape. Computer modeling of the process of crack formation and growth requires solving several problems. A review and critical analysis of the available experimental information on the growth rates of cracks in specific structural materials and in the environment that is characteristic of given operating conditions is required. An assessment of the crack growth rate is impossible without determining the stresses and strains in the shell structure of complex spatial geometry. The development of routine criteria for crack growth and their attachment to a stress-strain state calculation program is the next task. To solve these problems, a complex of three-dimensional finite element methodologies and programs based on the theory of thick shells has been created. The article presents some results of calculating the stress-strain state of adapters and the growth of cracks in them.
CALCULATION OF PARAMETERS OF MECHANICAL SYSTEMS WITH HARMONIC VIBRATION
Authors: Popov I. P.
Published: December 2021

Parallel and series connections of mechanical power consumers are considered. According to the known parameters of systems and the disturbing harmonic effect, the velocities of the elements of mechanical systems and the forces applied to them are algebraically determined. Attention is paid to resonant modes, incl. resonance of forces and resonance of speeds. The use of a symbolic (complex) description of mechanical systems with forced harmonic vibrations (in a steady state) made it possible to abandon the extremely cumbersome and laborious calculation algorithm associated with solving differential equations and replace it with simple and visual algebraic operations. Due to this, the calculation time is reduced significantly. Vector diagrams, not being a necessary component of the study of mechanical systems, are of significant methodological importance, since they show quantitative and phase relationships between the parameters of systems.
METHOD FOR DETERMINING THE PERFORMANCE OF GRINDING WHEELS
Authors: Nepomnyashchiy V. A. , Kolobkov A. V.
Published: December 2021

To determine the performance of grinding wheels, there are various ways to test them and criteria for evaluating it. These methods are studied, the advantages and disadvantages of each of them are revealed. We offer you another way to determine this parameter. The proposed method compares favorably with the previously developed versatility of use. It allows you to evaluate the performance of both the specific wear and the ratio of wear of the circle to the length of the ground surface.
DEVELOPMENT OF ENERGY EFFICIENT LIGHTING PROJECTS
Authors: Amel’kina S. A. , Duplenkova K. A. , Mikaeva S. A.
Published: December 2021

The article is devoted to the development of an energy efficient lighting project for an administrative building, taking into account the new requirements for the energy efficiency of lighting installations. The project was developed on the basis of computer simulation using modern LED lamps. The analysis of the impact of current regulatory requirements in the field of energy efficiency of lighting in public premises on the change in the range of manufactured lighting devices based on LEDs in Russia is carried out.
PUNCHING CUPS WITH BOTTOM FLANGE BY DIRECT EXTRUSION WITH COUNTER-PUNCH. EXPERIMENTAL VERIFICATION OF THEORETICAL RESULTS AT DIFFERENT TAPER ANGLES OF THE MATRIX
Authors: Vorontsov A. L. , Nikiforov I. A.
Published: December 2021

The results of an experimental verification of the obtained theoretical formulas are presented, which make it possible to determine the most important parameters for extruding glasses with a counter-punch at different taper angles of the matrix. The characteristics of the tools used, the geometric parameters of extrusion experiments, the strength characteristics of deformable materials, and their lubrication are described in detail. Extraction studies of both non-hardening and hardening material have been performed. The methodology for performing theoretical calculations is shown in detail. The high accuracy of the obtained calculation formulas is confirmed.
RADIAL EXTRUSION OF A PIPE BILLET WITH INTERNAL LEDGE. DETERMINATION OF THE DEFORMED STATE
Authors: Vorontsov A. L. , Reshchikov E. O.
Published: December 2021

By the method of plastic flow of A. L. Vorontsov, formulas were obtained that are necessary for calculating the accumulated deformations at any point of a pipe billet subjected to internal radial extrusion.
COMPARATIVE ANALYSIS OF CLASSIFICATION METHODS IN PROCESSING DATA ON THE ACTIVITIES OF CREDIT ORGANIZATIONS
Authors: Beketnova Yu. M.
Published: December 2021

The results of solving the classification problem of credit organizations from the point of view of possible involvement in the money laundering processes are presented. A comparative analysis of the results obtained using various modern classification algorithms is carried out. When analyzing credit institutions, Rosfinmonitoring analysts have to operate with large amounts of information. The actual need for the number of objects to be analyzed is in many times greater than the capabilities of analysts. This problematic situation requires prioritization of inspections. The heterogeneous nature of information resources and their significant volume exclude the possibility of their manual processing. It is necessary to move from successive expert examinations of individual objects to parallel mass automated checks, taking into account modern methodological and instrumental possibilities in the context of digital transformation of public administration. A comparative analysis of the results of processing data on the activities of credit organizations by classification methods – logistic regression, decision trees (algorithms of Two-Class Boosted Decision Forest, AdaBoost), the method of support vectors (algorithm of Two-Class Support Vector Machine), neural network methods (algorithm of Two-Class Neural Network), Bayesian networks (the algorithm of Two-Class Bayes Pointmachine) carried out. Of the classification algorithms considered, the most accurate results were shown by the algorithm of Two-Class Boosted Decision Forest (AdaBoost). The results obtained are of great practical importance and may allow Rosfinmonitoring analysts, as well as experts of the Bank of Russia, to identify deviant credit institutions potentially involved in money laundering processes.
FRACTAL SURFACE INTERPOLATION BASED ON CLASSICAL SUBDIVISION SCHEMES
Authors: Tikhomirova T. A. , Fedorenko G. T. , Nazarenko K. M , Nazarenko E. S.
Published: December 2021

A method to create a differentiable complex shapes from simple polygonal models is proposed. It is shown that classical schemes of “smooth” subdivision can be obtained from local self-similarity ratios if “deflection arrows” are scaled as s2, where s is the linear compression coefficient calculated for a flat regular grid of the same structure. The surfaces obtained by a smooth subdivision do not contain sharp features other than the vertices and edges of the original model, so in order to create a surface of more exotic shape one must use more complex model. The article describes an alternative approach, in which a fractal forecast of the position of embedded vertices, calculated using the local geometric self-similarity ratio, is used to obtain a pronounced surface shape. Fractal forecast transfers the properties of the original polygonal model to a smaller scale, thereby generating secondary sharp surface features that compose a large-scale texture. To ensure the differentiability of the surface, the fractal forecast is combined with the “smooth” one, and the proportion of the latter increases with decreasing scale.
ANALYSIS OF HISTORICAL DATA USING ARTIFICIAL INTELLIGENCE TECHNOLOGIES FOR PREDICTING THREATS IN COMPLEX DISTRIBUTED SYSTEMS
Authors: Palchevsky E. V. , Khristodulo O. I. , Pavlov S. V. , Sokolova A. V.
Published: December 2021

A threat prediction method based on the mining of historical data in complex distributed systems is proposed. The relevance of the selected research topic is substantiated from the point of view of considering floods as a physical process of water rise, the level of which is measured at stationary hydrological posts. The mathematical formulation of the problem is formulated, within the framework of which an artificial neural network is implemented based on the free software library “TensorFlow”. An analysis of the effectiveness of the implemented artificial neural network was carried out, according to the results of which the weighted mean square-law deviation of the predicted water level value from the actual one when forecasting for one day at stationary hydrological posts was 0.032. Thus, the neural network allows predicting the flood situation with acceptable accuracy, which gives time for special services to carry out measures to counter this threat.
ANALYSIS OF SPACECRAFT TELEMETRY INFORMATION USING THE KNOWLEDGE BASE, REPLENISHED DURING THEIR OPERATION
Authors: Soloviev S. V.
Published: December 2021

The method for intellectualizing the analysis of telemetric information from spacecraft arriving at ground-based flight controls is discusses. The features of state control during the spacecraft operation are formulated. The basic concepts, terms and basic properties of time series are presented, the definition of the physical meaning of the characteristic quantities for the spacecraft flight control process is given. The use of the mathematical apparatus for the analysis of time radars is substantiated in solving problems of telemetry support in the process of controlling the flight of spacecraft. A mathematical apparatus for analyzing time series is proposed to identify the actual trend. An approach to solving the problem of predicting the state of a spacecraft based on a comparative version is presented. Requirements for the intelligent analysis algorithm are presented and an integrated algorithm is proposed, a method based on time series.
SOFTWARE AND MATHEMATICAL SUPPORT FOR THE ANALYSIS OF OPTIONS FOR CONSTRUCTING ORBITAL GROUPINGS OF THE GLONASS SUPPLEMENT
Authors: Starkov A. V. , Fedorov A. V. , Zay Yar Win
Published: December 2021

The high accuracy and stability of Global Navigation Satellite System (GLONASS) consumer characteristics allows us to consider it as the basis of coordinate-time and navigation support for regional consumers. At the same time, one of the key factors influencing their choice of the preferred navigation system is to ensure the required levels of accuracy, availability and continuity of the radio navigation field in conditions of complex terrain, urban development and in areas with a high vegetation index. In this sense, the introduction of additional spacecraft into the GLONASS orbital constellation will increase its competitiveness. The article presents a methodology for building software analysis tools options build orbital groups, which allows you to explore the options of structures high-orbit segment of the principles and methods of their construction in order to effectively ensure implementation of navigation services, to analyze the deterioration of the quality of functional capabilities of high-orbit space of the complex due to the deformation under the influence of disturbing factors of various types and build a strategy for correction of motion of spacecraft. The composition and structure of software and mathematical support are proposed. Presents principles of organization and brief description of the software modules comprising: a module to determine the parameters of the perturbed uncontrolled motion of navigation satellites orbital constellation on the interval active life, module to evaluate degradation of functionality for advanced GLONASS and module support decision-making on strategies for correction of navigation satellites by determining the required reserves of the characteristic velocity.
THE PARALLEL-PIPELINED IMPLEMENTATION OF THE FRACTAL IMAGE COMPRESSION FOR RECONFIGURABLE COMPUTING SYSTEMS
Authors: Levin I. I. , Chekina M. D.
Published: December 2021

The developed fractal image compression method, implemented for reconfigurable computing systems is described. The main idea parallel fractal image compression based on parallel execution pairwise comparison of domain and rank blocks. Achievement high performance occurs at the expense of simultaneously comparing maximum number of pairs. Implementation fractal image compression for reconfigurable computing systems has two critical resources, as number of input channels and FPGA Look-up Table (LUT). The main critical resource for fractal image compression is data channels, and implementation this task for reconfigurable computing systems requires parallel-pipeline computations organization replace parallel, preliminarily produced performance reduction parallel computational structure. The main critical resource for fractal image compression is data channels, and implementation this task for reconfigurable computing systems requires parallel-pipeline computations organization replace parallel computations organiation. For using parallel-pipeline computations organization, preliminarily have produce performance reduction parallel computational structure. Each operator has routed to computational structure sequentially (bit by bit) to save computational resources and reduces equipment downtime. Storing iterated functions system coefficients for image encoding has been introduced in data structure, which correlates between corresponding parameters the numbers of rank and domain blocks. Applying this approach for parallel-pipeline programs allows scaling computing structure to plurality programmable logic arrays (FPGAs). Task implementation on the reconfigurable computer system Tertius-2 containing eight FPGAs 15 000 times provides performed acceleration relatively with universal multi-core processor, and 18 – 25 times whit to existing solutions for FPGAs.
METHOD FOR IDENTIFYING IMPORTANT NODES IN THE CITATION NETWORK OF SCIENTIFIC PUBLICATIONS
Authors: Ol'gina I. G.
Published: December 2021

A mathematical method for selecting and ranking publications according to the degree of their compliance with the objectives of the research is developed and investigated. Bibliographic and abstract databases are used as primary sources of data on publications, which make it possible to track the citation of publications and identify the corresponding citation networks. The subject of the study is the citation networks of scientific publications. The mathematical model of citation networks is simple directed graphs whose vertices correspond to publications and whose arcs correspond to bibliographic references. The objectives of the research can be the preparation of a scientific article, writing a monograph or textbook, the design of a final qualifying work or dissertation, the replenishment of the library fund, etc. The research is carried out using the methods of Network Science. A method is proposed for determining the importance of the nodes of the citation network of scientific publications, taking into account the relevant measures of the centrality of the nodes and the profile of the research of publications. Relevant measures of centrality are indicators of the importance of nodes that are more appropriate than others and meet the search query for the selection of publications. The paper considers three profiles of the research of the citation network in order to rank publications. Since the citation network is oriented, the incoming and outgoing connections of the node are analyzed separately. The difference between the study profiles is that in one of them, only outgoing connections are taken into account in the centrality measures, in the other – incoming connections, and in the next, both are taken into account. An example of the application of the developed method of selection and ranking of scientific publications is given. The experimental values of the network node importance indicators were obtained on the basis of data on the citation of scientific publications in the RePEc bibliographic database.
VIRTUAL LAB WITH REMOTE ACCESS
Authors: Gubsky D. S. , Daineko E. A. , Tsoy D. D. , Ipalakova M. T. , Ivanova I. N. , Kleschenkov A. B.
Published: December 2021

In the 21st century, we are experiencing a major change in teaching methods caused by the ubiquity of the Internet, which means that knowledge is available to anyone on the Internet without leaving home. Today, the role of a teacher is changing. Students perceive information differently. With the development of information technology, the penetration of digital tools into various spheres of our life is becoming common practice, and the field of education is no exception. Digital technologies provide many opportunities to improve education. One of the possible directions for improving higher professional education using digital technologies is the use of distance learning in the educational process. In distance learning, it is important to transfer materials not only through video calls to the student (webinars, video lectures), but also through the use of interactive technologies, especially in laboratory and practical works. This article provides an overview of the world experience in the development and implementation of labs with remote access. An approach to the creation of virtual laboratory works with remote access working in a virtual reality environment is considered. It is shown that equipment models with a computer interface completely analogous to real devices and the use of virtual reality elements make it possible to increase the effectiveness of their use in the educational process. A description of the creation of a laboratory work on the study of a microwave filter is given.
DEVELOPER ROLES IN THE SPEECH CORPUS FOR PRONUNCIATION VARIATION OF RUSSIAN SPEAKERS
Authors: Butenko Yu. I. , Stroganov Yu. V. , Kvasnikov A. V. , Slavnov N. V. , Kokurina N. V.
Published: December 2021

he article describes the user roles in the speech corpus for studying pronunciation variability of native speakers in the Russian language. The need for systems of speech recognition of speakers with dialects and disabilities is stated. It is emphasized the need to study the pronunciation variability of pronunciation by different speakers, taking into account regional and individual speech characteristics. Subsequent creating a speech corpus as the basis for regional and individual speech recognition is discussed. The speech corpus being developed contains recordings of the same text fragments by different speakers. The system of audio speech markup for researching the pronunciation variability of native Russian speakers is described. The roles of administrator, moderator, marker and analyst are provided for working with the corpus. Each user rights in the speech corpus are described: the administrator is the role which has all possible rights in the system. The marker is the user whose main task is to mark up the audio recordings. Analyst is the user who can assess and process the data in the speech corpus. The necessity of the moderator’s role in controlling the quality of markup is proved by the fact that it’s mostly students who mark up the audio recordings. The information in the developed speech corpora is supposed to be useful for phonetic studies in linguistics and a database for oral speech recognition.
NETWORK INTERACTION IN VIRTUALIZED ENVIRONMENTS AND FEATURES OF VIRTUAL STAND DEVELOPMENT
Authors: Golubkova E. M. , Kruglov A. M. , Vereshchagin A. A.
Published: December 2021

This article describes a virtual bench developed by the authors for studying network interaction in virtualization and containerization environments. The functional diagrams of the two modules of the stand are presented, as well as the exact characteristics of the software and hardware used in the work. The study of network interaction is carried out in a certain complex of proprietary and free software, which distinguishes it from previous studies. To build a virtual stand, the VMWare system was used, with the help of which 2 stand modules were created. The hypothesis of the research is that installed DPDK libraries on hosts and VMs and containers, as well as configuring OvS will increase network performance, which includes bandwidth and latency parameters. Network research is carried out in two modes of operation using the software switch Open vSwitch and DPDK libraries. The results of the study and the authors recommendations are given at the end of the work. Also, the key features of configuring virtual machines, containers and software switch, which are the main objects of research, were described. Further research on the topic involves defining a set of best practices for configuring all components of the network infrastructure (including the number of numa nodes, cpu pinning topology and the amount of huge pages), and making recommendations for choosing the main parameters of VMs and containers.
Una nueva especie de Dioscorea (Dioscoreaceae) para las Yungas del noroeste argentino
Authors: Asesor Patricia N. , Bulacio Eva
Published: December 2021

A new species of Dioscorea endemic to the Yungas of the northwestern Argentina, is here described as Dioscorea ayardei. This new species is characterized by the presence of a single anther inserted in a navicular structure with three dendriform projections. The new species is morphologically similar to D. haumanii and both inhabit mountain areas at the Sierras of Calilegua in the Jujuy province. A description of D. ayardei, together with illustrations, a distribution map, habitat description, conservation assessment, a comparative table with the related species and a diagnostic comparison with D. haumanii is presented.