bluuebunny/crossref_metadata_2025 huggingface dataset:
ANALYSIS OF STABILITY OF A THE VARIABLE-FREQUENCY DRIVES OF THE MAIN PUMPS
Authors:   Ufa State Petroleum Technological University, Dimukasheva Gulnaz , Zekrin Bulat ,   Ufa State Petroleum Technological University, Kirillov Roman ,   Ufa State Petroleum Technological University, Strelnikov Dmitry ,   Ufa State Petroleum Technological University, Khazieva Regina ,   Ufa State Petroleum Technological University
Published: December 2022

Relevance The problem of saving electricity consumption is becoming a topical and important issue nowadays. A large number of electric motors are operated irrationally due to inefficient or non-existent control systems. Most of these motors are used for mainline pumping units. The use of modern technologies of frequency-controlled electric drive makes it possible to save at least 20% of electric power in comparison with classical methods of regulation and increase the electric motor stability. Aim of research The stability of a frequency-controlled main pumping unit in case of supply voltage failures is analyzed. The aim of the work is to analyze the stability in case of voltage dips and the conditions for self-starting of the electric motor during voltage recovery. To achieve this aim, there was made an assessment of the static and dynamic stability of an asynchronous motor, the influence of the supply voltage of an asynchronous motor on its stability according to the results of mathematical modeling. Research methods In this study, the following methods were used: a study of the scientific literature, computer simulation performed in the Matlab/Simulink software package. Results The authors analyze the stability of the frequency-controlled asynchronous drive of the main pump unit, where in the process of research it is shown that the stability of the frequency converter and drive is sensitive to voltage dips in the supply network. The computer model of the investigated object was developed in the Matlab/Simulink software package. As a result of modeling the oscillograms of angular velocity of the rotor were obtained. Keywords: electric drive, main pump, induction motor, frequency regulation, frequency converter, mathematical model, efficiency
DEVELOPMENT OF A DIGITAL TWIN OF THE UNIT FOR SULFUR REMOVAL OF HYDROCARBONS
Authors:   Ufa State Petroleum Technological University (Branch in Sterlitamak), Shulaeva Ekaterina , Penkin Ilia ,   Ufa State Petroleum Technological University (Branch in Sterlitamak)
Published: December 2022

Relevance At the moment, one of the fastest growing and urgent problems of improving safety conditions and the quality of management of hazardous technological production is the design and implementation of tools that allow you to simulate technological processes on a computer to debug personnel actions before entering a real object. Thus, it becomes possible to solve the main tasks: training qualified personnel, and setting the optimal technological parameters. In addition to the practical aspect of this problem, there is an acute issue of security in regulatory legal acts. So, in accordance with federal norms and rules in the field of industrial safety, it is said that in order to acquire practical skills for the safe performance of work, the prevention of accidents and the elimination of their consequences at technological facilities with blocks of I and II explosion hazard categories, all workers and engineering and technical workers, those directly involved in the conduct of the technological process and the operation of equipment at these facilities undergo a training course using modern technical means of training and practicing such skills on specialized equipment capable of simulating a real process. To improve the level of personnel training for better and safer management of technological facilities, it is possible to use tools that have the ability to simulate technological processes and control systems on a computer before entering a real industrial facility. Thus, several tasks are solved: personnel training in the conduct of the technological process, and the choice of effective technological modes. Such equipment is a digital twin. Aim of research Development of a digital twin of the unit for desulphurization of hydrocarbon raw materials in the UniSim software. Research methods The Honeywell UniSim software package was used to develop a simulation model of the hydrocarbon feedstock desulfurization unit. Results This paper considers the creation of a mathematical model of a unit for desulphurization of hydrocarbons with simulation screens for an apparatchik and an operator. Keywords: modeling, digital twin of production, desulfurization, hydrocarbon feedstock, production management, simulation model
OPTOELECTRONIC DEVICES BASED ON DIFFRACTION GRATINGS FROM STANDING ELASTIC WAVES
Authors:   Ufa University of Science and Technology, Vazhdaev Konstantin , Urakseev Marat ,   Ufa State Petroleum Technological University, Allaberdin Azamat ,   Ufa State Petroleum Technological University, Subkhankulov Kostantin ,   Ufa State Petroleum Technological University
Published: December 2022

Relevance Currently, optoelectronic devices based on diffraction gratings from standing elastic waves are widely used. This is due to the fact that such devices are small in size, allow realtime measurements and have high accuracy, speed and reliability. A review of foreign patents and scientific and technical literature shows that in Japan, the USA, Germany and other countries, intensive work has been carried out in recent years to create optoelectronic devices as part of information-measuring systems based on the use of diffraction gratings from standing elastic waves. Such work is also carried out in Russia. Today, optoelectronic devices are widely used in various fields of industry, medicine, ecology, etc. Aim of research It is necessary to investigate the prospects of research on the development of optoelectronic devices based on diffraction gratings from standing elastic waves. It is necessary to consider the physics of processes in the field of acousto-optic interactions. It is important to give the main characteristics and possible applications of optoelectronic devices based on diffraction gratings from standing elastic waves. Research objects Light and sound waves interacting with each other when they pass through the same medium, diffraction grating, optoelectronic device. Research methods Mathematical methods of calculation and analysis. Results The need for research in the field of optoelectronic devices based on diffraction gratings from standing elastic waves is formulated. It is shown that when passing through the same medium, light and sound waves interact with each other. Light is scattered on a sound wave, as on a diffraction grating. Recommendations for the design of optoelectronic devices based on diffraction gratings from standing elastic waves are proposed. Possible areas of application of optoelectronic devices based on diffraction gratings from standing elastic waves are considered. Keywords: acousto-optics, waves, modulator, diffraction grating, optoelectronic device
DEVELOPMENT OF AN EFFICIENT DEVICE FOR ELECTROHYDRO-PULSED PROCESSING OF AQUEOUS SOLUTIONS
Authors:   Ufa State Petroleum Technological University, Aflyatunov Radmir , Vasilyev Petr ,   Ufa State Petroleum Technological University, Kirillov Roman ,   Ufa State Petroleum Technological University, Khazieva Regina ,   Ufa State Petroleum Technological University
Published: December 2022

Relevance The growth and development of plants directly depends on watering them with aqueous solutions that contain a sufficient amount of trace elements. In the article, the authors propose an efficient power source for an electrotechnological installation designed for aqueous solutions. This installation allows you to increase nutrients and stimulates their absorption by plants. Aim of research The main task is to develop an efficient device for electrohydropulse treatment of aqueous solutions. Research methods In this study, the following methods were used: patent review and study of scientific literature. Results The authors propose to use a voltage source based on a multifunctional integrated element. The article presents a power supply circuit for an electrotechnological installation based on a two-section single design and technological component. With its versatility, the power supply based on the presented component will allow changing the voltage over a wide range and reducing the weight and dimensions of existing installations many times over. One of the sections of the multifunctional component will be used as a transformer, and the second as a capacitor. Keywords: multifunctional integral electromagnetic component, filter-compensating device, device for electrohydropulse treatment of aqueous solutions, analytical calculation of parameters Acknowledgments: The research was funded by a grant from the President of the Russian Federation Scholarship in 2022–2024 for young scientists and graduate students carrying out promising research and development in priority areas of modernization of the Russian economy. Grantee Khazieva Regina T.
REACTIVE POWER COMPENSATION USING A HIGH-POWER REGENERATIVE AC DRIVE
Authors:   South Ural State University, Maklakov Alexander , Nikolaev Aleksandr ,   Nosov Magnitogorsk State Technical University, Lisovskaya Tatiana ,   Moscow Polytechnic University, Linkov Sergey ,   Nosov Magnitogorsk State Technical University
Published: December 2022

Relevance At present, there is no complete understanding of the possibilities of reactive power compensation by means of high-power regenerative AC drives (RACD) with active frondend rectifiers (AFE), given the limitations and associated problems with electromagnetic compatibility. Aim of research The article is devoted to the issues of reactive power compensation and improvement of the voltage quality in the grid by high-power RACD with AFE. Research methods Methods of theoretical and experimental researches are applied in the work. Results It was noted that the smooth component of the first harmonic of the AFE output voltage is limited by the voltage in the DC link and the maximum allowable AFE current, and this affects the range of transmitted reactive power in the system «RACD with AFE – grid». Thus, there are restrictions for the generation of reactive power in the system «RACD with AFE – grid», which requires their special calculation in the synthesis of the control system. Power quality improving by powerful RACD with AFE is possible only with the correct choice of the grid connection, the switching frequency of semiconductor modules, resonance analysis, AFE control system parameters and thermal control of the power modules. The experimental curves of current consumption from the grid presented in the paper with two different PWM algorithms for the AFE demonstrates a decreasing of current total harmonic distortion. Keywords: active front-end rectifier, pre-programmed PWM, selective harmonic elimination, electromagnetic compatibility, power quality Acknowledgments: The work was supported by the Grant of the President of the Russian Federation for young scientists — candidates of sciences MK-3803.2022.4.
TEST BENCH FOR SIMULATING OPERATION MODES OF SUCKER ROD PUMP ELECTRIC DRIVE
Authors:   Ural Federal University, Nakataev Anton , Tekle Samuel ,   Ural Federal University, Ziuzev Anatoliy ,   Ural Federal University, Nesterov Konstantin ,   Ural Federal University
Published: December 2022

Relevance In the practice of designing and developing high-tech types of equipment for electrical complexes, it often becomes necessary to conduct tests in the absence of access to existing equipment, for example, due to the specifics of oil production facilities. To assess energy efficiency, study diagnostic problems, and develop the functions of control stations for sucker-rod pumping units, it is advisable to use laboratory test benches allowing to perform these works in stationary conditions and significantly reduce the cost of their implementation. Aim of Research Development of a test bench for the study of dynamic processes in electric drives of sucker-rod pumping units for oil production. Research methods The following methods were used: mathematical and computer modeling, including real-time modeling; physical modeling based on a test bench. Results A test bench has been developed that, with a given scale, implements the electromechanical processes occurring in the electric drive of a sucker-rod pumping unit; the use of experimental power diagrams as training sets for diagnostic problems by machine learning is proposed; the possibility of creating and debugging control systems for the technological process of oil production on a test bench was demonstrated. Keywords: test bench, sucker rod pumping unit, load simulation, electric drive, oil production
FEATURES OF A FAULTY PHASE AT SINGLE PHASE-TO-GROUND FAULTS
Authors:   Ufa State Petroleum Technological University, Shabanov Vitaly , Sorokin Alexander ,   Ufa State Petroleum Technological University
Published: December 2022

Relevance Devices for determining the location of fault on power lines assume a known type of short circuit and faulty phases. However, their algorithms, as a rule, can not distinguish the faulty phase. Therefore, the determination of faulty phases during short circuits on power lines is performed by separate devices – faulty phase selectors. The transient resistance at the point of closure has a strong influence on the work of selectors. The influence of transient resistance is especially strong at single phase-to-ground faults. Therefore, the study of the effect of transient resistance on the work of selectors at single phase-to-ground faults is an urgent task. Aim of research The aim of the article is to investigate and develop features of a faulty phase at single phase-to-ground faults via transient resistance in networks with an isolated neutral. Research method To study the features of a faulty phase, the article uses vector diagrams and graphs of changes in phase voltages when the transient resistance changes at fault location. When closing through a transient resistance, it is assumed that the vertices of the linear voltage triangle on the vector diagram and the neutral potential move around the circles with increasing transient resistance, and the ground potential remains unchanged. To study the change in the magnitude of phase voltages during short circuits through the transient resistance, a new variable was introduced — the angle by which the neutral voltage vector, taken with the reverse sign, lags behind the voltage vector of the faulty phase in the pre-emergency mode. The introduction of such a variable simplifies the equations for stresses and makes the analysis of the effect of transient resistance more general and visual. Results It is shown that, depending on the magnitude of the transient resistance, the lowest of the phase voltages in single phase-to-ground faults can be either the voltage of the faulty phase or the voltage of the unfaulted phase lagging in relation to the faulty one. At the same time, the lowest value of the phase voltage can be a sign of a faulty phase only in the range of transient resistances from zero to the boundary value. The features of a faulty phase during short circuits through the transient resistance are formulated. It is shown that the features of a faulty phase using angular relations between stresses are valid for any value of the transient resistance. While the features based on the determination of the phase with the lowest phase voltage act only in a limited range of transient resistance values. Keywords: single phase-to-ground fault, network with isolated neutral, faulty phase, transient resistance
In-vitro comparison of bonding time and strength of adhesive pre-coated and standard metal orthodontic brackets
Authors: Essop Rashid , Ghabrial Emad , Becker Piet J
Published: December 2022

To compare the shear bond strength and bond time of 3M Unitek's APC (Adehesive Pre-Coated) Flash-Free™system applied to metal brackets. An in vitro study was performed on 40 extracted sound human premolar teeth randomly divided into two groups (20 per group) bonded either with Adhesive Pre-Coated Flash-Free metal brackets or metal brackets coated manually with Transbond XT™ light-cure adhesive. Bonding time was measured using a stopwatch. Thermoycling was performed on the samples (500 cycles) to simulate the oral environment between baths of 5°C and 55°C distilled water. Debonding shear bond strength measurements were performed in an Instron universal testing machine. The APC Flash-Free group bonded in significantly (p<0.001) less time (mean 34.06s/tooth) than the manually coated group (mean 55.14s/tooth). Shear bond strength of the manually coated group was significantly (p<0.001) higher (mean 13.32 MPa) than the APC Flash-Free group (mean 10.95 MPa). The APC Flash-Free free system is efficient and allows for reduced chair time during the bonding appointment while attaining a mean shear bond strength of 10.95MPa, which is higher than the minimum shear bond strength of between 4MPa and 7MPa1
Electrical Impedance Tomography to Measure Spirometry Parameters in Chronic Obstructive Pulmonary Disease Patients
Authors:   ,   Universidad de Guanajuato, Vargas Luna Francisco Miguel , Kashina Svetlana , Riu Costa Pere Joan ,   Universidad Politécnica de Cataluña, Casan Clarà Pere ,   University of Oviedo, Balleza Ordaz José Marco ,   Universidad Autónoma de Guanajuato
Published: December 2022

Spirometry is a test for the diagnosis of chronic obstructive pulmonary disease. It is a technique that can be intolerant due to the essential use of a mouthpiece and a clamp. This study proposes the use of electrical impedance tomography to measure respiratory parameters. Patients underwent spirometry and three respiratory exercises. The impedance signals were convolved, and the resultant was analyzed by fast Fourier transform. The frequency spectrum was divided into seven segments (R1 to R7). Each segment was represented in terms of quartiles (Q25%, Q50%, Q75%). Each quartile of each segment was correlated with the spirometric parameters to obtain a fitting equation. FVC was correlated 70% with the 3 quartiles of R7, 3 equations were obtained with a fit of 60%. FEV1 correlated 70% with the Q50% of R7, obtaining an equation with a fit of 40%. FEV1/FVC correlated 69% with Q75% of R2, obtaining an equation with a fit of 60%. Spirometric parameters can be estimated from the implied carrier frequency components of the ventilatory impedance signal.
La selección de portafolios y la frontera eficiente: el caso de la Bolsa de Medellín, 1990-1992
Authors: Medina Carlos A , Echeverry Jose I
Published: December 2022

Este trabajo busca: brindar un mejor conocimiento de las opciones de rentabilidad y riesgo brindadas por las 32 acciones que componen el Índice de la Bolsa de Medellín (IBOMED), para el período 1990-1992, y establecer los principales cambios que han presentado estas opciones durante la década al compararlas con las del período 1979-1981. Una vez planteado el problema de portafolios para inversionistas con funciones de utilidad esperada definidas en sus dos primeros momentos centrales, se resuelve el problema cuadrático que el mismo genera para encontrar las fronteras de portafolios eficientes con base en las acciones que componen IBOMED.
Ecuación de la frontera de posibilidades de producción utilizando la función Cobb-Douglas
Authors: Arango Héctor
Published: December 2022

Nota Didáctica
El desempleo estructural y la tasa natural de desempleo: algunas consideraciones teóricas y su estado actual en Colombia
Authors: Yarce Will Alexander
Published: December 2022

En la actualidad, el concepto teórico de la tasa natural de desempleo ha trascendido las cátedras universitarias para convertirse en una herramienta útil para analistas y responsables de la política económica. En este artículo, la tasa natural de desempleo es el eje central de análisis y en él se plantean, en la primera parte, algunas consideraciones teóricas asociadas al desempleo estructural y a la tasa natural de desempleo y sus determinantes. La segunda parte del artículo se refiere a las estimaciones de la tasa natural en Colombia, los cambios estructurales en años recientes y a los cálculos del autor de la tasa natural para el periodo 1984-1997. Por último, se plantean algunas conclusiones, a manera de reflexiones finales e implementaciones de política. Palabras Clave: Desempleo estructural, tasa natural de desempleo, inflación, mano de obra calificada.
Knowledge Gap Hypothesis and Pandemics: Covid-19 Knowledge, Communication Inequality, and Media Literacy in Lebanon
Authors: Melki Jad
Published: December 2022

The study examines the knowledge gap hypothesis during the Covid-19 pandemic in a country experiencing severe social, political, and economic turmoil and inequality. The research design assesses Covid-19 knowledge through 13 variables and incorporates income, education, gender, and media literacy among the socioeconomic status variables. It also includes television exposure, social media exposure, and social media posting as media use measures. A cross-sectional survey of adults living in Lebanon was implemented between March 27 and April 23, 2020. The study aimed for a nationally representative probability sample of 1,536 participants (95% CI, ±2.5%) and received 792 valid responses (51.6% response rate). The results show a positive relationship between Covid-19 knowledge and education, media literacy, and social media exposure, but no relationship between Covid-19 knowledge and income, gender, television exposure, and social media posting behavior. The evidence shows a widening of the knowledge gap for those more likely to post on social media and a narrowing of the knowledge gap for those more exposed to social media news, but the observed narrowing of the knowledge gap for television exposure was not statistically generalizable. Finally, the evidence shows that media literacy maintains the knowledge gap by almost identically increasing the knowledge level for both low and high socioeconomic groups, although the limitations in measuring media literacy merit further exploration.
On the nature of the teleseismicPnphase observed on the ultralong-range profile “Quartz,” Russia
Authors: Morozov Igor B. , Morozova Elena A. , Smithson Scott B. , Solodilov Leonid N.
Published: December 2022

The most prominent secondary phase observed in the records from the ultralong profile “Quartz” crossing northern Eurasia is the high-frequency long-range (teleseismic) Pn. This phase, propagating with the group velocity of about 8.1 to 8.2 km/sec to over 3000 km distances, dominates the records within the frequency range above about 5 Hz. Within this teleseismic Pn, we distinguish onsets of several branches having higher apparent velocities between 8.5 and 8.6 km/sec. Using travel-time modeling techniques, we associate the teleseismic Pn with whispering gallery modes traveling within the top 160 km of the mantle. The long incoherent coda of this phase results from scattering and from reverberations of seismic waves within the crust. The contrast in frequency contents between the teleseismic Pn and deeper refracted and reflected phases is explained by the increase of inelastic attenuation within the prominent low-velocity zone (LVZ) below the depth of about 150 km.
How can Trust Exist in the Absence of Time?
Authors:   , McGarvey Kevin , Gefen David
Published: December 2022

Financial advisors often struggle with the dichotomy of the time required to build a trusting relationship with prospects/clients and the time-pressured demands of corporate-imposed sales goals. If advisory firms can better understand how people leverage word-of-mouth recommendations, then there are widespread implications for business development and for hiring practices in the industry. In this study, we examine the role of word-of-mouth referrals through social networks, its impact on interpersonal trust, and ultimately, how that trust translates to the selection of a wealth services provider. Surveys collected from a broad sample of respondents, many of whom are in the high-net-worth space, show that a greater social distance (between recommender and recommendee) increased interpersonal trust in the recommender of the advisor and also increased the likelihood of behavioral intention to choose (and switch) an advisor. Potential takeaways for wealth management firms in view of those findings are discussed.
Is There a Place for Complement Inhibition with Monoclonal Anti-C5a Antibody Vilobelimab in the Treatment of Patients with ANCA-associated Vasculitis?
Authors: Gheriani Gatr-Alnada ,   Division of Immunology, Carver College of Medicine, The University of Iowa, Iowa City, IA, USA, Kumar Bharat ,   Division of Immunology, Carver College of Medicine, The University of Iowa, Iowa City, IA, USA, Lenert Petar S ,   Division of Immunology, Carver College of Medicine, The University of Iowa, Iowa City, IA, USA
Published: December 2022

Recent studies have implicated the complement system in the pathogenesis of antineutrophil cytoplasmic antibody-associated vasculitis (AAV), prompting the development of novel therapeutic agents to target the complement system accordingly. The pivotal role of complement component C5a, in particular, has been the subject of a number of phase II and phase III clinical trials. Indeed, the US Food and Drug Administration has already approved avacopan, an oral C5a receptor inhibitor, as an adjunct for the treatment of active severe AAV, based on its favourable safety profile and non-inferiority to glucocorticoids (GCs) (at Week 26). The novel monoclonal anti-C5a antibody vilobelimab has also been studied in a phase II trial in patients with AAV (IXchange; ClinicalTrials.gov Identifier: NCT03895801). The results appear promising; in addition to decreased GC toxicity index, a smaller number of treatment-emergent adverse events have been observed in vilobelimab-treated patients. However, the study was not powered statistically to compare the efficacy of vilobelimab to standard GC treatment. This editorial summarizes the study findings and outlines potential future directions.
The Complement System in Spondyloarthritis: What Do We Know?
Authors: Mistegaard Clara Elbæk ,   Department of Biomedicine, Aarhus University, Aarhus, Denmark,   Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark,   Department of Clinical Medicine, Aarhus University, Aarhus, Denmark, Proft Fabian ,   Department of Gastroenterology, Infectiology and Rheumatology (including Nutrition Medicine), Charité – Universitätsmedizin Berlin, Berlin, Germany,   Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
Published: December 2022

Spondyloarthritis (SpA) encompasses a group of rheumatologic diseases, including axial spondyloarthritis (axSpA), psoriatic arthritis, arthritis with associated inflammatory bowel disease (i.e. Crohn’s disease and ulcerative colitis), reactive arthritis and undifferentiated SpA, which all share certain clinical, biological and genetic features. However, the pathogenesis remains largely unexplained. Recent evidence suggests an autoinflammatory component of the disease. The complement system is a cornerstone of the innate immune system. This review aims to evaluate the current knowledge of the complement system in SpA. Animal models have shown that complement activation is associated with axSpA. Complement proteins L-ficolin and H-ficolin levels are elevated in patients with axSpA, and complement factor C3 levels decrease after the initiation of tumour necrosis factor-inhibitor therapy. Associations with disease activity are inconsistent, as one study found that the serum levels of complement factors C3 and C4 did not differ in patients with different Bath Ankylosing Spondylitis Disease Activity Index scores but, in another study, were associated with baseline Ankylosing Spondylitis Disease Activity Score with C-reactive protein and Bath Ankylosing Spondylitis Disease Activity Index improvement after treatment with a tumour necrosis factor inhibitor. Future studies should focus on the complement system in various SpA entities, involvement in pathogenesis and disease progression under clinically relevant conditions.
DIGITAL POSSIBILITIES OF THE ATMOSPHERE: METAVERSE AND HALLUCINATORY IMAGE
Authors: HATIPOĞLU Serkan Can , TATLI Cansu
Published: December 2022

Considering the propositions of the virtual universe with its short history, there are digital twins and various economic investments. While the Metaverse points out a novel universe, it is able to promise much more than producing a copy of the self and imitation of conventional economic interactions. To reveal these potentials, it is necessary to determine the areas that must be meticulously focused on. Although Metaverse has permeated daily life dialogues, studies in the academic field are limited. Likewise, research about its architecture and space needs to be developed in this area. No matter how far the new universe propositions go, they still stick with the quantitative values of the physical world. This issue obstructs the creation of its own reality. However, the universe's own digitalized digitalised structure does not require that the imagination of the spaces stuck with a quantitative basis. To avoid quantitative and reductive attitudes, focusing on the atmosphere of this universe may be a solution. The study aims to collide the possibilities of the Metaverse and the architectural atmosphere discussions to make an alternative reading of the Metaverse. Developing theories about the atmosphere of spaces and conducting atmospheric studies about Metaverse allow us to develop meta-experiences of the Metaverse. Focusing on the architectural atmosphere, immediate appreciation, ecstatic being and hallucinatory image will deepen the definition of Metaverse and provide a multi-layered experience. The image of the atmosphere and ecstatic being is associated with a ‘hallucinatory image'. The hallucinatory image has a structure that does not narrow down its references to the physical world. With this aspect, it may provide forms of alternative perceptions specific to the Metaverse. The hallucinatory image, parallel with the sensation of an ecstatic being, stimulates us to sense the atmosphere produced by the Metaverse.
The Solidarity Determination Data and Absolute Data of Balhae Region
Authors:   Korean Ancient Historical Society, Choi Jung-Bum
Published: December 2022

Data showing absolute dating in Korean archaeological data are extremely rare, and Balhae is no exception. However, if you look at Empress Sunmok, Princess Jeonghye, and Princess Jeonghyo, who have a clear absolute age, you can use it as the standard for the first year of Balhae archaeology. In addition, Chinese porcelains, Tang-style metal belts, and Bronze mirrors, which have not received much attention so far, can cross-age through Chinese data. In addition, it is possible to estimate the date of the excavated relics through cross-examination with the period of the Balhae ruins in Primorsky, which have been accumulated until recently, as well as to the period of occupancy of the unit ruins. In this regard, it was expressed that there i s a need to actively utilize the data of the reverse date excavated from the Balhae ruins. Furthermore, it is expected that a sophisticated chronological system of Balhae archaeology can be established through a comprehensive review and thorough verification of the remains, where historical dating materials that can be set up.
Temperatura de los fluidos de operación y su efecto en el performance de una torre de enfriamiento de laboratorio
Authors:   Universidad Nacional del Santa, Guevara Chinchayan R. , Sosa Sandoval Jenneviene Janet ,   Universidad Nacional del Santa, Chucuya Huallpachoque Roberto Carlos ,   Universidad Cesar Vallejo
Published: December 2022

Objetivo. La presente investigación determina el efecto de las temperaturas de los fluidos de operación en el performance de una torre de enfriamiento de laboratorio. Materiales y Métodos. La investigación es del tipo experimental realizado en el laboratorio de generación termoeléctrica, en la cual se determina el comportamiento del desempeño de la torre de enfriamiento de tiro forzado, tal como el rendimiento térmico, acercamiento y rango. Resultados. Se caracterizó los flujos experimentales para poder evaluar el desempeño de la torre de enfriamiento; para ello, se trabajaron con 4 flujos másicos de agua caliente, cada uno de ellos a temperaturas de 30, 40, 50, 60 y 70 °C. Se elaboraron las curvas de comportamiento de los fluidos actuantes en la torre de enfriamiento, evaluándose el desempeño en función a los valores de temperatura de bulbo seco y bulbo húmedo del aire y las temperaturas del agua de enfriamiento. Conclusión. Para el caso de un flujo de 0.0047 m3/s y una temperatura de entrada del agua caliente de 30 °C, se alcanzó una eficiencia de 91.67 %, con un flujo másico de aire de 0.00421 m3/s de aire caliente a 30 °C y una humedad relativa de 58.6 %, requiriéndose a la salida del proceso, aire caliente con humedad relativa de 92.8 %, con flujo másico de agua de reposición igual a 0.324 m3/h. Los indicadores de desempeño de las torres de enfriamiento son óptimos para el caso del flujo másico de agua caliente igual a 0.00421 m3/s.
Diseño de mezcladora automatizada para mejorar la productividad y la calidad del producto Engorde Hermelinda en la empresa Nutriaves S.A.C.
Authors:   Universidad Privada del Norte, Geldres Marchena Teodoro , León Ulloa Jharol ,   Universidad Privada del Norte, Florián Santillán Alexis ,   Universidad Privada del Norte, Aguirre Alvarado Evelyn ,   Universidad Privada del Norte
Published: December 2022

En este artículo se presenta el diseño de una maquina mezcladora de 1000 kg automatizada para el proceso de producción del alimento balanceado Engorde Hermelinda en la empresa Nutriaves SAC con el fin de mejorar la productividad de la maquinaria en su fase de mezclado y la calidad de los productos producidos. La investigación es de carácter no experimental y la metodología aplicada es cuantitativa. Para su elaboración, se utilizaron las fórmulas de volumen del cilindro y del tronco de cono que permitieron el cálculo de las dimensiones de su estructura, a su vez, se realizaron conversiones de unidades para obtener los tiempos de vaciado de cada uno de los ingredientes transportados mediante el sistema de tuberías que llenan al equipo. Asimismo, el circuito eléctrico con PLC S7-1212 y su programación se desarrolló con el programa CADE SIMU que también permitió comprobar el cumplimiento de todos los procedimientos que se desea que haga mediante su simulación. Finalmente, se concluyó que la productividad mejoro en un 50%, ya que aumento de 6.19 tn/h a 12.37 tn/h y, del mismo modo, se optimizo con la calidad debido a la consistencia y precisión de la automatización implementada que elimina por completo el error humano.
Aplicación del Sistema Kanban para aumentar la productividad del área de producto terminado de una empresa pesquera
Authors:   Universidad Cesar Vallejo, Gutiérrez Castillo Maria Claudia , Torres Pardo Fiorella Mishel ,   Universidad Cesar Vallejo, Morales Suen Levi Alexander ,   Universidad Cesar Vallejo
Published: December 2022

El presente informe de investigación tuvo por finalidad implementar el Sistema Kanban en el área de producto terminado para aumentar la productividad, por tal motivo la metodología empleada fue aplicativa con un diseño pre-experimental, así mismo la muestra involucró a los 33 colaboradores del área de producto terminado. Para el diagnostico, se determinó el tiempo de ciclo del proceso a través del VSM obteniendo 70 seg. por lata, así mismo se determinó la productividad inicial de mano de obra el cual fue de 84.17%, del mismo modo, se utilizó la metodología 5S, la cual se realizó mediante la aplicación cada una de sus fases obteniendo un 89.78% de cumplimiento, posteriormente como resultado de la aplicación del Sistema Kanban se organizó cada una de las sub-áreas de tal manera que se generó una sincronización de las actividades, en las que se empleó el tablero Kanban y tarjetas Kanban, que ayudaron a mejorar el flujo de trabajo. Concluyendo que la aplicación del Sistema Kanban aumentó la productividad de mano de obra en un 2.37%, que se reflejó en la mejora del tiempo de ciclo de 15 seg. por lata.
Automatización y simulación de una estación de clasificación con pívots y sensores de visión
Authors:   Universidad Privada del Norte, Leon Leon Ryan , Vigo Moreno Luis ,   Universidad Privada del Norte, Purizaga Moya Shadia ,   Universidad Privada del Norte, Ruiz Girón Nayely ,   Universidad Privada del Norte, Navarro Viteri Susana ,   Universidad Privada del Norte, Palza Hernandez Jhonatan ,   Universidad Privada del Norte
Published: December 2022

El presente trabajo se realiza con el propósito de diseñar y elaborar una simulación de una estación de clasificación automatizada de cajas, utilizando pívots y sensores de visión. Se busca clasificar tres tipos de cajas, según su tamaño, los cual podrían representar a distintos detalles y/o información. Con esto se logra reducción de tiempos y demoras en el proceso, ya que todo estará programado. Se utilizarán cálculos mecánicos, eléctricos, matemáticos y electrónicos para lograr a la elaboración completa de la estación. Las cajas que se colocarán pueden ser de tres tamaños distintos, esto puede variar según la programación que se le dé. De igual manera, se puede controlar la velocidad de las fajas transportadoras. La investigación es de carácter experimental porque se han desarrollado cada uno de los cálculos necesarios para llegar al resultado final de la estación de clasificación.
El movimiento de transición para las comunidades latinoamericanas
Authors:   Universidad Mariana, Villota Paz Javier Mauricio
Published: December 2022

En el siguiente texto se expondrá cómo los hábitos de consumo de los recursos del ser humano ha llevado a distintas comunidades a optar por desarrollar técnicas no convencionales para seguir produciendo y así consumir y/o adquirir, de manera irracional, distintos bienes y servicios, que se obtienen y ofertan a partir de distintas fuentes no renovables como el petróleo, para llevar una vida “cómoda”. Se requiere, por tal motivo, generar un movimiento de transición para poder adaptarse a nuevas alternativas en la generación de energías renovables, así como el desarrollo de prácticas que favorezcan el futuro de las generaciones siguientes y logren hacer frente al cambio climático. Distintas comunidades, en países de Europa, ya han hecho frente a esta situación y se busca que las comunidades de América latina propongan iniciativas para generar dicha resiliencia. Se exponen, así, cinco retos que deben afrontar las comunidades para iniciar con la transición.
Evaluación de la aceptabilidad de una bebida de matico (Piper aduncum) y manzanilla (Chamaemelum nobile)
Authors:   Universidad Cesar Vallejo, Correa Palacios Katherine Geraldine , Díaz Medina Stalyn Daniel ,   Universidad Cesar Vallejo, Símpalo López Wilson Daniel ,   Universidad Cesar Vallejo
Published: December 2022

El trabajo de investigación tuvo por objetivo principal evaluar la aceptabilidad de una bebida de matico y manzanilla. El diseño de investigación es experimental puro de tipo aplicada con un diseño de mezclas simplex centroide. Se utilizaron técnicas como encuesta, análisis documental, análisis experimental, análisis de procesos, observación experimental, análisis sensorial y análisis estadístico. Su población fue representada por todas las formulaciones y su muestra fue 7 ejemplares. Los instrumentos aplicados fueron: cuestionario, Informe de COLECBI, dop, guía de observación experimental, matriz de experimentos, escala no estructurada y software StatGraphics (ANOVA). Para iniciar se realizó un estudio de mercado obteniéndose que, si es favorable en 75.9% desarrollar una bebida natural con estas plantas, luego se caracterizaron las materias primas, consiguiendo el porcentaje de proteínas, ceniza, humedad fueron los óptimos seguidamente se realizó un proceso productivo de esta bebida, detallando las etapas en un dop, luego se elaboró las 7 formulaciones dadas por el software para finalmente, obtener la bebida aceptable sensorialmente que fue la formulación 6, el cual estuvo conformado por matico 18.30%, manzanilla 28.30% y azúcar 48.30%, en donde el atributo de mayor relevancia fue el sabor. Por otro lado, de manera estadística se valida la hipótesis, dada por los panelistas porque el Análisis de varianza por atributo tuvo un valor de p < 0.05, significativamente y la formula optima fue 17 % matico, 28.24% manzanilla y 49% azúcar. En conclusión, el análisis estadístico demostró que es factible desarrollar una bebida debido a su nivel de aceptabilidad.
PLANEJAMENTO URBANO FUNCIONALISTA EM ALTAMIRA-PA
Authors: Pimentel Cleyton Alves Candeira , Ravena Nírvia
Published: December 2022

Throughout history, cities in the Xingu region have undergone major economic, demographic, environmental, social and political transformations that have modified their territorial and urban development. Altamira and its cities of influence underwent, in the context of the Brazilian Amazon, two macro configurations: the construction of the BR-230 highway (Transamazônica) and the construction of the Belo Monte Hydroelectric Power Plant (UHE). The objective of this article is to synthesize these transformations considering that urban planning, in this case, based on the manageability of large economic infrastructures, ordered the Xingu space from a rational-physical-territorial perspective, being, therefore, the form of planning that led to this region to be what it is today. In order to reach this objective, the explanatory-analytical method was used, focusing on the historical observation of the praxis of urban planning in the territory, and, in a complementary way, a systematic bibliographical research of notorious works on the subject was carried out. It is observed that throughout these experiences, functionalist urban planning was instrumental in the reorganization of this space during the impacts of these enormous infrastructures in the Xingu region. Therefore, based on this, it is expected that the functionalist way of ordering the urban space will propagate trends of continuity with the attempts to implement the Belo Sun Project.
Autoavaliação e heteroavaliação: uma abordagem prática no ensino superior
Authors: Bolzan Larissa Medianeira , Iriondo Otero Walter Ruben , Monteiro Botelho Rafael
Published: December 2022

Esta pesquisa-ação teve como objetivo compreender o impacto dos mecanismos de autoavaliação e heteroavaliação no ensino superior, por meio de abordagem prática num curso de engenharia. Para tal, foram realizadas experiências em cinco semestres, sendo três ocorridos presencialmente e dois como ensino remoto (devido à pandemia de covid-19), na mesma disciplina do curso superior de Engenharia de Produção de uma instituição pública de ensino no Brasil. Como principais resultados, observou-se que as práticas de heteroavaliação e autoavaliação proporcionaram transparência ao processo de avaliação, potencializaram o aprendizado dos acadêmicos e fizeram com que eles mantivessem o comprometimento na tarefa proposta.
Guías de etnoingeniería: lineamientos para la incorporación de la etnoingeniería en los sectores: vial, educación, salud y protección social y turismo
Authors: Zegers María del Carmen , Tressler Josephine , Massa Isabella , Tyrer Clemente , Albertos Carmen , Rodriguez Porcel Manuel , Sánchez Jimena
Published: December 2022

La diversidad socio cultural que existe en América Latina y el Caribe proviene de las poblaciones indígenas y grupos étnicos que existen en la región, los cuales se involucran cada vez más con proyectos de desarrollo. Sin embargo, la falta de socialización de los proyectos y la poca o nula participación de las poblaciones indígenas limita su desarrollo, evidenciando la falta de estrategias asertivas de cómo abordar estos proyectos. La publicación “GUÍA DE ETNOINGENIERA” incorpora a través de métodos participativos, las particularidades socioculturales y medioambientales de los beneficiarios y su hábitat. Esta guía busca implementar la etnoingeniería en proyectos de infraestructura desarrollados con y para pueblos indígenas y otros grupos étnicos de la región. El documento se organiza en dos módulos centrales: i) Transversal que aborda los ejes de co-creación, gobernanza, criterios de diseño y metodología; y ii) Sectorial que contiene lineamientos y propuestas de solución para proyectos de diferentes tipologías de infraestructura (vial, educación, salud y protección social, y turismo). La publicación incluye lecciones aprendidas, reflexiones y recomendaciones, a fin de proporcionar conceptos clave que permitan a los equipos de proyecto incluir la etnoingeniería en los proyectos, desde la formulación y diseño, ejecución, operación y mantenimiento.
The Factors Affecting Consumer Response towards Online Video Advertisement: YouTube as a Platform
Authors: Puwandi Pius Hubert , DE Gabriela Tiara , Brasali Nicholas
Published: December 2022

The purpose of this research is to examine factors that affect Consumer Response toward Online Video Advertisement analysing YouTube as a platform. A descriptive survey was conducted to collect data using a self-administrative questionnaire. Based on convenience sampling, a sample of 263 respondents was drawn from all internet users in Indonesia who watch YouTube videos and haven't used the paid version of YouTube which is free from advertisements. The results of this study indicates that (1) consumer behavior toward online Video Advertisement positively affects consumer response, and (2) the research also showed that there is a direct relationship between consumer behavior and consumer response. This research concludes that the antecedents of viewers' attitudes toward online video advertising will ultimately influence their response to make a purchase.
The Relationship between Principal's Leadership and Work Climate with Teacher Performance
Authors: Ratno Ratno , Wildan Wildan , Baehaqi Baehaqi
Published: December 2022

The purpose of this survey study was to determine the relationship of school leadership and work climate with the performance of state junior high school teachers in Batukliang Subdistrict, Central Lombok Regency in 2019. The research population of all PNS teachers was 80 teachers and a sample of 50 people were taken by proportional random sampling technique. Data collection using a questionnaire. Data analysis uses regression and correlation tests. The results showed that there was a relationship between the Principal's leadership and the work climate both individually and jointly with the performance of the State Junior High School teachers in Batukliang District, Central Lombok Regency.
“Merchan” como experiência de emancipação e cumplicidade: feminismo, autenticidade e consumo no YouTube
Authors: Evangelista Simone
Published: December 2022

A partir de debates sobre a práticas que orientam as performances de microcelebridades em plataformas digitais, busca-se compreender como três influenciadoras socialmente engajadas negociam esse status na produção de vídeos patrocinados. Analisa-se qualitativamente seis vídeos ligados a pautas feministas publicados no YouTube pelas brasileiras Júlia Tolezano, Maíra Medeiros e Nátaly Neri. As conclusões apontam para negociações entre as esferas do ativismo e do consumo a partir de dois traços performáticos predominantes: o consumo como experiência de emancipação feminista e reforço da cumplicidade com a audiência.