bluuebunny/crossref_metadata_2025 huggingface dataset:
On relations of objects in Graham Harman’s object-oriented ontology
Authors: Gaiko Georgiy G. , Boyko Alina A. ,   Orel State University named after I.S. Turgenev
Published: September 2021

The article aims to analyze the relations between objects in the object-oriented ontology of Graham Harman. The authors consider Harman’s concept to be one of the main achievements of modern philosophy. This concept makes it possible to overcome the problem of objectivity as such and to gain access to the object uncorrelated by the subject of knowledge. Using the presented scheme of the object, the authors postulate the absence of the subject and subject-object relations based on correlations. Thus, the problem of objectivity is solved in a radical way. However, Harman’s object-oriented ontology does not explain how the relations between uncorrelated objects occur. It is essential to find the way to describe the mechanism of interaction between objects in which the object remains real, i.e. uncorrelated, and at the same time sensual, accessible for perception and interaction. That is why the authors turn to Jacques Derrida’s concept of deconstruction. Its application to the analysis of relations between objects in Graham Harman’s object-oriented ontology allows the authors to deabsolutize correlationism as the only possible way of relations between objects, and at the same time to preserve it as a way of interaction between objects. The nature of the relations between objects can be logically explained by the philosophy of Albert Camus, through combining his method of cognition with the principle of deconstruction. Using this method, the authors come to a conclusion that correlations necessarily arise when objects interact, which allows them to manifest themselves as accessible. However, the existence of objects by themselves takes place without correlations. They are a condition for the appearance of a sensory object, but they are not possible with the existence of real objects on their own. The method proposed shows that the relations of objects represent an inextricable duality of the sensual and the real object, which is manifested in their knowable-unknowable nature. Studying the nature of interaction between objects in Graham Harman’s object-oriented ontology with the help of this method allows better understanding of the problem of objectivity as such. This issue requires further, more extensive, study and discussion.
POSTCAREER OF RUSSIAN GOVERNORS 1991‒2020: MAIN DIRECTIONS
Authors:   Sociological Institute of FCTAS RAS, Flyagin Artem ,   Saint-Petersburg State University
Published: September 2021

The author collected and analyzed the biographies of all heads of the Russian regions who held their posts from 1991 to 2020. The main focus of this work was the careers of former heads of regions after their end of term. Information about the post-career of regional heads was found in 268 cases. The most popular directions of the post-governor career were federal government and business. Regional administration is much less popular, and local administration are almost not represented. In most cases, the governorship was a springboard in one's career. An analysis of changes in the main directions of post-career development over time showed a clear reflection of the consequences of the policy of “recentralization”: the marginalization of regional and local politics and the focus of former governors on the transition to central government are traced. In addition, the high popularity of business structures prompts the conclusion about plutocratization of the regional level of power.
PUBLIC COMMUNICATION BETWEEN CITIZENS AND PUBLIC AUTHORITIES: FORMING OF JUDMENTS ON DIGITAL PLATFORMS
Authors:   St. Petersburg State University, Smorgunov Leonid , Ignatjeva Olga ,   St. Petersburg State University, Bykov Ilya ,   St. Petersburg State University, Kondratenko Konstantin ,   St. Petersburg State University, Baryshkin Aleksey ,   LLC "Netrika"
Published: September 2021

Research on the impact of information and communication technologies (ICTs) on the field of public communication has become a trend of the last decade. This article aims to identify the relationship between the relational qualities of digital platforms (affordances) and the processes of judgment formation during communication on urban issues. To analyze the functioning of the process of lay epistemics on digital platforms of communication between the authorities and the population, we developed a new methodology of discourse analysis by modifying the parametric model of judgment of the American social psychologist A. Kruglanski and introducing the scale of intensity of its criteria. Communication on the platform "Our St. Petersburg", representing the possibility of interaction of citizens with the city authorities, was used as an empirical base of the research. As a result of the research using descriptive and regression analysis, and a visual survey of this platform, it was found that there is interconnection between the dominance of affordances corresponding to the "authoritarian" type of governmentality and the formation of predominantly informational judgments of the behavioral type. It was also found that the criteria of the parametric model have a different impact on the formation of a certain type of judgment in the framework of digital communication.
DYNAMICS OF THE UKRAINIAN NATIONAL IDENTITY IN DEBATES ON EURO-ATLANTIC INTEGRATION
Authors:   National Research University “Higher School of Economics”, Zhyrun Iryna
Published: September 2021

This paper analyses changes of meanings of identity in competing projects of national identity in case of debates among the Ukrainian elites on the issue of Euro-Atlantic integration in 2008 and 2018. The author identifies three projects of identity, which are based on a different understanding of foreign policy in relation to Euro-Atlantic integration. The most significant change of identity is the dominant position of the pro-Euro-Atlantic discourse that was contested in 2008 by the opponents of NATO membership. However, after the transformation of the political context in Ukraine in the post-2014 period, some representatives of the elites continue to support the project of identity in which Ukraine is constructed as a non-bloc state. In both periods the elites reach a consensus on Ukraine's representation as a European and democratic country. Despite changes in the domestic and international contexts, discursive representations of Ukraine as a victim and a colonial state, where Russia or the United States presented as aggressors and colonizers, continue to exist. The changes in dynamics of national identity are as follows: expansion of an identity representation on a larger audience, a “shift” of a representation into another category within the same discourse, and “borrowing” and adoption of a representation by competing identity discourses.
EzRAD detail protocol v1
Authors: Vu not provided , C. Bird, , T. O. Truong, , Q.S. Tran, , T. L. Tran, , E. E. Biesack, , A. S. Ackiss, , K. E. Carpenter, , B. T. Dang,
Published: September 2021

This protocol describes the methodologies used for DNA extraction, quantification, restriction digestion, and make libraries from non-model organisms following Toonen el al. (2013). Toonen, R. J., Puritz, J. B., Forsman, Z. H., Whitney, J. L., Fernandez-Silva, I., Andrews, K. R., et al. (2013). ezRAD: a simplified method for genomic genotyping in non-model organisms. PeerJ 1, e203. doi:10.7717/peerj.203.
Pseudoislets for diabetes research: Purifying and selective re-aggregating human islet cells v1
Authors: Liu Wei , Dorrell Craig , Chen Xiaojuan
Published: September 2021

In vitro modeling of human islet cells for diabetes research utilizing purified and then selectively re-aggregated various combinations of human islet cells.
A Study to decrease the incidence of PPH in our hospital setting
Authors:   Agrawal Hospital, Agrawal Dr. Neelima , Agrawal Dr. P. N. ,   Consultant Respiratory and Critical care, Agrawal Hospital, Bhopal, Madhya Pradesh, India
Published: September 2021

Objective: This study aimed to measure incidence, identify risk factors (pre‐existing or acquired) forPPH and to prevent progression to severe PPH. Methods: This is a prospective observational study.The causes are likely to be multifactorial with shifting demography and health status widely cited,e.g. age, obesity, comorbidity, multiple pregnancy and ethnicity. Results: Prepregnancy factors forPPH include age, ethnicity, BMI, previous PPH and assisted conception Conclusion: Prophylacticuterotonic agents in high-risk patients, use of intramuscular or intravenous oxytocin, timelyapplication of B –lynch suture, adequate and timely arrangement of blood and blood factors can helpprevent PPH.
A comparative study of various screening tests of Asymptomatic Bacteriuria in pregnant women attending Antenatal Outpatient Department’
Authors:   MD Microbiology, Assistant professor, Department of Microbiology, Sri Venkateshwaraa Medical College Hospital and Research Centre, Puducherry, India, Hiremath Dr. Savitha B
Published: September 2021

Introduction: Urinary tract infections are the most common bacterial infections in pregnancy.Asymptomatic bacteriuria (ASB) refers to the presence of bacteria in the urine of an individualwithout symptoms of urinary tract infection. ASB which occurs in 2-11% of pregnancies is a majorpredisposition to the development of pyelonephritis. Aims and objectives: The aims and objectivesof the study were to: Study the effectiveness of various screening tests: urine microscopy, gramstain, catalase test, leukocyte esterase test and nitrite test and to compare their sensitivity,specificity, positive predictive value and negative predictive value. Materials and Methods: Thestudy included 500 pregnant women attending the outpatient department over 18 months. The urinesamples collected in sterile containers were screened for urine microscopy, gram stain, catalase test,leukocyte esterase test and nitrite test. The samples were processed on CLED (Cysteine lactoseelectrolyte deficient) agar as the standard against which other screening tests are identified.Results: Gram’s stain (89.34%) was the most sensitive of all and the least reliable test was thecatalase test among the methods of screening tests. Conclusion: Urine culture is considered to bethe gold standard in detecting ASB in pregnant women. Gram’s stain of urine is a good screeningtest when compared to other screening methods. Screening for bacteria in all trimesters isnecessary to prevent the dangerous complications associated with ASB.
СТРАНИЦЫ ИСТОРИИ МЕСТНОЙ АНЕСТЕЗИИ. ЧАСТЬ 1
Authors: П. Ю. Столяренко
Published: September 2021

Монография посвящена истории возникновения и развития местного обезболивания – от древних цивилизаций до начала XXI века. В первой части книги охвачены периоды от использования примитивных средств для местного обезболивания, открытия шприца и инъекционной иглы до первого местного анестетика – кокаина. В работе уточнены многие исторические факты, сообщаются интересные подробности, публикуются редкие документы и иллюстрации. Использованы как раритетные издания, так и информация, полученная через Интернет. В книге 97 иллюстраций, библиография содержит 270 названий. Для широкого круга читателей – стоматологов, анестезиологов-реаниматологов, хирургов, историков медицины, научных работников, студентов медицинских вузов. Ключевые слова: история, местная анестезия, кокаин.
Criteria for Involving RES in Increasing the Energy Security of Isolated Inactive Areas of the North and Arctic Zone of the Russian Federation
Authors:   National Research Tomsk Polytechnic University, Lukutin Boris V.
Published: September 2021

The article proposes the main criteria for involving renewable energy sources in improving the position of energy security in isolated hard-to-reach areas where decentralized power supply complexes operate under conditions of severe climatic changes and isolation. The considered criteria form the integrated value of renewable energy sources in ensuring energy security through a number of criteria such as resource significance, economic significance, environmental significance, energy significance. A group of indicators is proposed as part of the criteria, which is not limited to them, as well as the conditions for the formation of a gradation of threshold values of indicators with measurement tools are given. Schemes of analysis of resource indicators are given. Evaluation of the above criteria in accordance with the above methodology constitutes a criterion basis for a more efficient and optimal choice of the type of renewable energy sources, the option of combining renewable and traditional resources in the appropriate direction of ensuring and increasing the energy security of decentralized energy zones
Structure and Phase Composition of the Surface Layer of Elastomers Modified by Tungsten Magnetron Sputtering
Authors:   Omsk State Technical University, Kalistratova Lyubov F.
Published: September 2021

This paper contains the results of studies of the structure and composition of the surface layer of the tungsten coating of a rubber substrate. The rubber substrate is prepared on the basis two rubbers: polychloroprene rubber Denka RS‑40A (Bypass 611) with a mass fraction of 0.70; the rest-BNKS‑28 AMN. The deposition of tungsten on the substrate surface was carried out by magnetron sputtering on the installation «ADVAVAC VSM‑200». Microscopic studies of the surface layer of the samples, decoding of X‑ray images and elemental chemical analysis allowed us to determine the structure and phase composition of the surface layer depending on the time of sputtering of tungsten. It is shown that the surface layer of elastomers has a granular structure, which includes cluster formations of tungsten in the atomic state in the form of a β-modification of tungsten (W5) and individual inclusions of atomic elements that are part of the rubber substrate
New Method for Assessing the Degree of Deterioration of a Building Into Account a Decrease in the Heat-Shielding Properties of Its Enclosing Structures
Authors:   Tashkent Institute of Railway Engineers, Shaumarov Said S.
Published: September 2021

Today, it is relevant to develop a methodology for assessing the degree of deterioration of a building based on the loss of heat-shielding properties of its external enclosing structures, and hence the establishment of the physical parameters of the fences responsible for the formation of comfortable conditions in the internal environment of the premises. Based on the research carried out, the dependence of the air flow through the cell of free volume per unit time was obtained as a function of the cell diameter and the modulus of the pressure gradient. This article presents the results of the obtained mathematical model of the interaction of the building envelope with external climatic factors, taking into account the regularities of changes in the characteristics of the outdoor climate
The experience of absurdity: existentialistic paradigm and paradigm of theatre of the absurd (with regard to Samuel Becket's play 'Not I')
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Verbivska H. O.
Published: September 2021

This article circles around the phenomenon of absurdity and absurd which appears to be greatly elaborated by Albert Camus and Theatre of the Absurd. The article reflects mainly upon Becket's dramatic monologue "Not I", which might be characterized as a sort of missing link between two forms of absurd. The style of Albert Camus puts emphasis on the inner experience extrapolated by means of the author. In this sense, the feeling of despair and existential crisis, typical for existentialism in general, brings into existence the absurdity of being as such. In comparison with that, the manner, in which Theatre of the Absurd presents current states of things, organizes the comic dimension of a given situation. To put it another way, Theatre of the Absurd sets up living intersubjectivity, which is a sense-formative precondition of the laughter, and dynamic omnipresence of the inner experience literally declared on the scene. Becket's "Not I" deploys, on the one hand, the existentialistic understanding of human beings, and, on the other, the theatrical representation injected with intersubjectivity. The article takes into account Deleuzian approach towards cinematography in order to conceptualize Becket's play. The notion of affection-image, which is taken from Deleuze, illustrates the structure and essentially the nature of images taking place in "Not I". Becket draws special attention to the image of the voice with regard to audial metaphors, which the main heroine uses during all the time of self-enunciation. Behind the words that she speaks there is an implicit trauma, which is unknown to the contemplators of the performance. It is noteworthy to admit that the organization of the play makes visible only the mouth of the heroine whereas everything remains in the shadows. Deleuzian affection-image deals with annihilated spatial-temporal coordinates and absolutization of the face (faceification). The quality of metaphors in the monologue and the decoration of space establish the phenomenon of absurdity in Becket's "Not I".
Theory and practice of creativity: challenges of the "pandemic times"
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Zhyvohliadova I. V.
Published: September 2021

The article is devoted to the analysis of the problem concerning adapting the art world to the challenges of the global crisis of co-creation caused by the current pandemic situation. The study is based on the understanding that in these extraordinary circumstances the co-creation becomes an effective form of cultural resistance to social distance. The times of "crisis creativity" is analyzed, which becomes not just a time of "responses" to external challenges that have been accumulated for years, but a time of self-organization, self-ordering of the art world (museums, art galleries, art industry, creativity of individual artists). The analysis of the collective efforts of world museums to maintain the world of art through the creation of forms and methods of artistic communication is made.
First experience with chronic epidural spinal cord stimulation in Khanty-Mansi autonomous okrug — clinical observations
Authors: Bondarenko Olga A. , Gavrilov Gaspar V. , Padurets Vadim A. , Kasich Roman V.
Published: September 2021

Purpose of the work. The article is devoted to the first experience of epidural stimulation in the Khanty-Mansiysk Autonomous Okrug at the budgetary institution Surgut Clinical Trauma Hospital. Clinical examples are presented for two main indications for the application of this technique (disease of the operated spine, a consequence of spinal cord injury in combination with chronic neuropathic pain syndrome).
Research methods. An assessment of the intensity of pain syndrome was given according to a visual analogue scale, the Pain Detect questionnaire; indicators of anxiety, depression on the HADS scale; quality of life according to the Oswestry questionnaire for a follow-up period of 6-12 months in patients with chronic epidural stimulation.
Results. A positive assessment of the action during test neurostimulation was 63.3% (38 patients). Of the established permanent systems, a good result was achieved and persisted for 12 months or more in 96% (24 patients). It was necessary to change the stimulation parameters in 13% (3 patients). Revision of permanent systems was performed in 20% (5 patients), due to the progression of the degenerative-dystrophic process of the spine, damage and migration of system elements.
Conclusions. Chronic epidural spinal cord stimulation has established itself as a personalized, highly effective, minimally invasive and safe method of treating chronic neuropathic pain syndromes. Multicomponent corrective action is of scientific interest and requires further study.
Virtual reality — new possibilities in the treatment of pain
Authors: Trepalina Tatiana S. , Yakupov Eduard Z.
Published: September 2021

The purpose of this research is to present virtual reality technology as one of the modern and novel option for pain syndromes treatment. Low back pain is one of the most frequent reasons for seeking medical help. According to the literature 90% of people experience back pain at least once in their life and 10% of them have a chronic course of pain. There may be many reasons for this: inadequate pain treatment, poor compliance with treatment, drug resistance, self-treatment, use of alternative medicine, etc. Pain that bothers a person for a long time significantly reduces the quality of life, affects cognitive functions and emotional state, and leads to a distorted perception of oneself body. Patients with pain contribute significantly to the financial losses of society in the form of lost wages and productivity. Low back pain is recognized worldwide as the most significant condition in relation to the number of years lived with disability. When patients are insensitive to treatment or its effectiveness is low, doctors resort to the use of non-pharmacological approaches. One of the modern and new options is the use of virtual reality. This technology allows the patient to distract himself from his pain and thus be out of the fear of movement. Studying and applying new non-pharmacological pain management methods may allow patients to reduce their medication use and increase compliance with treatment, as well as help to reduce the number of people with chronic pain.
Subjective cognitive impairment —more questions than answers
Authors: Yakupov Eduard Z. , Zhamieva Rimma A.
Published: September 2021

The article is devoted to the actual problem of subjective cognitive impairment, in particular, diagnostic methods, as well as hidden and obvious factors affecting its development. Due to the lack of effective treatment, today special attention is paid to pre-demental cognitive disorders.
Aim. Analysis of available literature data on subjective cognitive impairment.
Material and methods. Various sources were considered during conducting a literature review on the selected topic. The search depth was more than 15 years. Russian and foreign sources were studied on Internet platforms such as Web of science, UpToDate, PubMed, CyberLeninka, Medscape for selection of literature.
Results. According to the studied data, the prevalence of subjective cognitive impairment is quite high in the population, but diagnosis remains difficult due to the lack of susceptible and unified tests. International diagnostic criteria for subjective cognitive impairment are described. The article also presents modern ideas about the obvious and hidden factors that affect the course and prognosis of this state. The possibility of early diagnosis, as one of the most urgent tasks, as well as the methodology of neurocognitive testing are discussed.
Conclusion. Subjective cognitive impairment is becoming an increasingly urgent problem every year. In this regard, doctors of various specialties need to focus attention with minimal suspicion of pathology, since at this stage the changes are potentially reversible. There are both explicit and implicit factors that lead to subjective cognitive impairment. Among the hidden factors, the article discusses multitasking, impaired social interaction, gadget addiction, affective disorders, sleep disorders, pain, and COVID-19. For the most effective detection of subjective cognitive disorders, it is necessary to have unified sets of susceptible tests, which are currently under development.
Rapid Prediction of Strong Ground Motions from Major Earthquakes: An Example in the Wudu Basin, Sichuan, China
Authors: Zhang Xiaolong , Peng Xiaobo , Chen Shaolin , Li Xiaojun , Dou Zhan , He Xiangli , Xu Chong
Published: September 2021

Rapid prediction of ground motions of major earthquakes can assist emergency response and postseismic damage assessment. Numerical simulations can perform such prediction. However, they need a large number of calculations based on real data and depend on large-scale computation resources, limiting practice of real-time prediction. To solve this problem, this article proposes a new prediction method based on a 3D transfer function, which is obtained by solving the site seismic response to three impulse function excitations that can be calculated by different pre-event 3D physics-based numerical simulations. This approach only needs one seismic record in the study area and can quickly (near-real time) predict ground motions in the whole study area. We verify the proposed approach with an Mw 5.7 aftershock of the 2008 Mw 7.9 Wenchuan earthquake in the Wudu basin, Sichuan Province, China. The results show that this method is feasible and has sufficient accuracy in nearly real-time prediction of seismic ground motions.
Segregation, Inequalities and Discrimination
Authors: Oberti Marco
Published: September 2021

The aim of this paper is to show that school segregation not only has an impact on school achievement, but also on more qualitative issues such as the perception of inequalities and the feeling of discrimination. I propose an explanation for why the feeling of being trapped in segregated, ‘disreputable’ public schools, a feeling which is shared among people from disadvantaged and immigrant backgrounds, as well as parts of the lower-middle class, has a deep impact on social cohesion. We will see how this encourages working-class people to think more in terms of discrimination (segregation as the result of an intentional process) rather than in terms of inequality, calling into question public schools’ capacity for guaranteeing equal opportunity. This is another way of analyzing how people facing an unequal context perceive injustice.
The Continuity of Adhocracy: Formal Practices of Segregated Schooling of Immigrant Students as a Mirror for German Migration Politics
Authors: Karakayalı Juliane
Published: September 2021

This article shows the historical continuities of segregated schooling of migrant children in Berlin from the 1960s to the present. My main argument is that segregated schooling can be understood as a result of an administrative denial of the fact of immigration. Instead of changing the system for the needs of a diverse student body, schools and school administrations develop instable adhoc regulatory practices of segregated schooling.
Compresión de datos de tipo real basada en un novedoso algoritmo de codificación para redes neuronales de impulsos
Authors: Lucas Sergio , Arriandiaga Ander , Portillo Eva , Zubizarreta Asier , Cabanes Itziar
Published: September 2021

En este trabajo se propone la compresión de datos de tipo real basada en un nuevo algoritmo de codificación para Redes Neuronales de Impulsos inspirado en la conocida modulación por ancho de pulso (PWM). Esta propuesta presenta una serie de ventajas como la simplicidad del algoritmo. Así, permite al usuario establecer el compromiso deseado entre calidad y consumo de recursos de memoria mediante la selección de un sencillo parámetro.
Ethernet-based monitoring systems for renewable energy-hydrogen microgrids
Authors: Calderón Godoy Antonio José , González Pérez Isaías , Portalo Calero José María , Calderón Godoy Manuel
Published: September 2021

The digitization of power systems has given birth to the rise of challenging scenarios like Smart Grids and Smart Microgrids. These infrastructures are mainly based in decentralized energy generation as well as in the intelligent management of the energy flows and data communications. For their successful implementation, a communication network is imposed for the proper data transmission between the vast amount of sensors, controllers and supervisory nodes involved. Ethernet-based networks have become the prevalent means for communications in office environments and are being increasingly applied also for industrial facilities. Consequently, Smart Grids and Smart Microgrids are also being equipped with Ethernet communication. This paper presents an Ethernetbased monitoring system architecture where monitoring software, proprietary automation hardware and open-source equipment share data over an Ethernet network. A set of experimental facilities are reported in order to prove the validity of the proposal.
A3C for drone autonomous driving using Airsim
Authors: Villota Miranda David , Gil Martínez Montserrat , Rico-Azagra Javier
Published: September 2021

In this work, we apply artificial intelligence to guide a drone to a certain point autonomously. Unreal engine creates a virtual environment where the drone can fly, and the algorithm is trained simulating the drone dynamics thanks to Airsim plugin. The implemented algorithm is Asynchronous Actor-Critic Advantage (A3C), which trains a neural network with less computing resources than standard reinforcement learning algorithms that normally needs costly GPUs. To prove these advantages, several experiments are run using a different number of parallel simulations (threads). The drone should reach a point randomly generated each episode. The reward, the value and the advantage function are used to evaluate the performance. As expected, these experiments show that a higher number of threads helps the leaning process improve and become more stable. These learning results are of interest to optimize the computing resources in future applications.
Control de velocidad de un ventilador de una CPU
Authors: Alvarado Aldea Ignacio , Borja Conde José Antonio , Haes Ellis Richard , Muñoz de la Peña Sequedo David
Published: September 2021

En este artículo se presenta un sistema de control minimalista que puede estar al alcance de todos los alumnos. Este sistema presenta un reto multidisciplinar en el que los alumnos necesitan aplicar conocimientos de electrónica, programación, tratamiento de señales y control. Mediante el montaje y el control de este sencillo equipo, que consta solo de cuatro componentes, los alumnos aprenderán los elementos básicos de un sistema de control.
Una integración a sistemas de gestión de aprendizaje en estándares de un sistema barra-bola
Authors: Montoro Alicia , Ruano Ruano Ildefonso , Estévez Estévez Elisabet , Gómez Ortega Juan , Gámez García Javier
Published: September 2021

Los laboratorios de tipo online tienen cada vez más aceptación dentro de la educación universitaria relacionada con las ciencias, tecnologías, ingenierías y matemáticas (CTIM o STEM en inglés), donde el trabajo práctico es de vital importancia para los estudiantes. El presente trabajo trata un ejemplo de integración de un laboratorio online en un sistema de gestión de aprendizaje (LMS-Learning Management System). Los estándares SCORM (Shareable Content Object Reference Model) y LTI (Learning Tool Interoperability) ofrecen la posibilidad de integrar laboratorios online en un LMS. Este trabajo, ha adaptado un sistema barra-bola convencional para posteriormente tratarlo como ejemplo de integración de un laboratorio online virtual y remoto al LMS de la Universidad de Jaén a través del estándar SCORM.
Optimización de temperatura en reactores raceway para la producción de microalgas mediante regulación de nivel
Authors: González Hernández José , Rodríguez Miranda Enrique , Guzmán José Luis , Berenguel Manuel , Acién Fernández Francisco Gabriel
Published: September 2021

Además del pH y el oxígeno disuelto, otros parámetros que afectan de forma considerable al crecimiento de las microalgas son la radiación solar y la temperatura. Una temperatura inadecuada reduce de manera notoria la productividad de biomasa en los fotobioreactores y puede incluso causar el colapso total de los cultivos. El control directo de la temperatura en reactores abiertos a gran escala se considera inviable debido a la gran cantidad de energía requerida, por lo que solo queda la opción de usar sistemas pasivos o semipasivos. Este artículo presenta un método indirecto para la optimización de la temperatura en estos sistemas mediante la variación del nivel del cultivo haciendo uso de predicciones meteorológicas.
Aplicación de una metodología de selección de bucles y ajuste de controladores mediante optimización multiobjeto
Authors: Huilcapi Víctor , Blasco Xavier , Herrero Juan M. , Pajares Alberto
Published: September 2021

En este artículo se presenta la aplicación de una metodología de selección de lazos de control y ajuste de controladores para controlar un sistema multivariable no lineal denominado unidad caldera-turbina. Se plantearon dos escenarios y se definieron dos conceptos de diseño (combinaciones de lazos de control), cada uno con seis objetivos. Se muestra como la metodología permite establecer un marco de comparación global de cada concepto de diseño y ofrece información detallada a un diseñador para que de acuerdo con sus preferencias pueda seleccionar una solución adecuada para controlar el sistema bajo estudio.
Rentabilidad de baterías en aplicaciones FV para el sector comercial bajo operación basada en MPC
Authors: Ayuso Pablo , Pérez Emilio , Cardo-Miota Javier , Beltrán Héctor
Published: September 2021

Este trabajo define una estrategia de operación basada en Control Predictivo basado en Modelo (Model Predictive Control, MPC) para instalaciones fotovoltaicas con baterías instaladas en el sector terciario/comercial. La propuesta incluye modelos de predicción de la irradiancia a futuro y modelos de consumo de las cargas basados en técnicas de agrupamiento. La operación del sistema se simula durante un año entero con datos de irradiancia y consumo reales para un centro comercial situado al sur de España. Finalmente, se analiza la rentabilidad del sistema, en términos de vida útil de las baterías requeridas para lograr el retorno de la inversión realizada, para diferentes combinaciones de sistema FV, tamaño de las baterías, y precios de la energía.
Issues and Potentials of Local PPS in Realizing a Japanese Version of Stadtwerke
Authors:   Waseda University, Graduate School of Environment and Energy Engineering, 513 Wasedatsurumakicho, Shinjuku-ku, Tokyo, 162-0041, Japan, Zhao Shuheng , Onoda Hiroshi
Published: September 2021

This paper presented an overview of local power producers and suppliers (local PPS) that were established in Japan since the general liberalization of the retail electricity market, with particular focus on the current situation and issues of the local PPSs in terms of their operations and their renewable energy-related efforts. Further, this paper analyzed relevant cases in Ishikari city in Hokkaido, Karatsu city in Saga prefecture, and Sakura city in Chiba prefecture, to discuss and inform future efforts towards realizing a Japanese version of Stadtwerke.
Barriers for Clean Energy Projects
Authors:   West Virginia University School of Medicine, Morgantown, WV 26505 USA, Bonnici Maximilian , Greene Henry , Bonnici Isabelle ,   Central Connecticut State University, New Britain, CT 06053, USA,   University of Rhode Island, Kingston, RI 02881 USA
Published: September 2021

Clean energy may offer a more environmentally friendly outcome than fossil fuels. However, clean energy is beset by uncertainties when the sun does not shine through and the wind does not blow. Worse still, science has not yet overcome scalability issues that are compounded by lack of technological knowhow on how to store solar and wind energy. The electrical “green-outs” of August 2020 in California are a reminder that without storage facilities for clean energy, utilities are driven to spot markets for electricity rendered from traditional sources of energy as economic setbacks occur due to compromised supplies of electricity. Without means of energy storage, new technology cannot fully replace the old. One can only hope that the dream to build a future based on renewable energy will lead to discoveries that will overcome scalability and storage issues.
Economic and Environmental Impacts of Distributed Energy Resources
Authors:   the Mechanical and Energy Engineering Department at Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia, Alqurashi Amru
Published: September 2021

The current power system suffers from inherent inefficiencies and transmission line congestion due to the spatial split between power generation and end usage. This potentially introduces shortcomings in meeting load demands, grid liability, renewable portfolio standards, and environmental considerations such as carbon emission reduction targets. The economic and technical viability of distributed energy resource (DER) technologies may accelerate the transition to more sustainable energy production. This paper investigates the economic and environmental benefits of DERs compared to utility prices and emissions for residential dwellings using the Distributed Energy Resources Customer Adoption Model (DER-CAM). The results show a tradeoff between the CO2 emissions and electricity costs, but improvements over purchasing the electricity.
Catechin Extracted from Uncaria gambier Roxb for Nanocatechin Production: Physical and Chemical Properties
Authors: Malrianti Yefsi , Kasim Anwar , Asben Alfi , Syafri Edi , Yeni Gustri , Fudholi Ahmad
Published: September 2021

This research reports nanoparticles or nanocatechin produced from catechin extracted from gambier and the differences between the properties of the extracted catechin and nanocatechin. The study began with the preparation of >95% pure catechin through successive extraction. The catechin obtained was converted to nanocatechin with a high-speed homogenizer on a 1% suspension of catechin in water at 12,000 rpm for 30, 45, 60, 75 or 90 minutes. Results showed average diameters of the nanocatechin 90-minute homogenized colloids were then dried with a spray dryer so physical and chemical properties could be compared with those of the raw extracted catechin. Catechin content, water content, pH, refractive index, density, molecular weight and rotational angle were unaltered. Appearance, solubility, thermal properties, highest absorbance wavelength and antioxidant activity were measured. Initial degradation temperature and antioxidant activity of nanocatechin were higher than those in the originally extracted catechin.
Growth of Scots pine plus trees clones, selected by resin productivity in Nizhny Novgorod region
Authors:   Nizhny Novgorod State Agricultural Academy, Besschetnova N.N. , Besschetnov V.P. ,   Nizhny Novgorod State Agricultural Academy, Gorelov A.N. ,   Nizhny Novgorod State Agricultural Academy
Published: September 2021

The taxational indicators of clones of plus trees of Scots pine, selected by resin productivity, were studied in comparison with similar characteristics of plants, selected by linear parameters of the trunk. They are represented They are presented in the assortment of the forest seed plantation No. 10 in the Semenovsky forestry of the Nizhny Novgorod region, created in 1984 on a plot with the type of forest growing conditions — B2, and the type of forest — maynikovo-lingonberry pine. In the organization of the work, the principle of the only logical difference was observed, as well as the requirements for the typicality, suitability and expediency of the experience. As a test marker for checking the purity of the clonal composition of the plantation, the value of the angle of attachment of the first-order lateral branches to the trunk was used. The height and diameter of the trunk are taken into account in 571 trees with a continuous list. The distribution of the average values of the analyzed indicators in the vegetative offspring of plus trees compared with each other is not uniform. The highest height (16,70 ± 0,43 m) observed in clones of the K-011 plus tree selected by resin productivity is 2,65 m or 1,19 times higher than the lowest value (14,05 ± 0,44 m) inherent in clones of the K-113 plus tree selected by the same criteria, and 2,02 m or 1,14 times higher than the lowest value (14,23 ± 0,31 m) inherent in clones of the K-171 plus tree selected by the same criteria taxational indicators of the trunk. Differences in the taxational indicators of clones in the group of plus trees distinguished by resin productivity, as well as in the group of trunks distinguished by characteristics, correspond to the level of significant ones, which indicates the specificity of their genotypes. The degree of similarity of the plus trees in terms of trunk parameters is not the same, which indicates a different level of individual non-identity of each of the plus trees in relation to the others in their considered population.
Subject-spatial environment of children’s playgrounds formation in Moscow
Authors:   Russian State Agrarian University — Moscow Timiryazev Agricultural Academy, Dovganyuk A.I.
Published: September 2021

The analysis of the subject-spatial environment of children’s playgrounds is presented. Their special importance in the formation of a comfortable, stable and safe environment for children is highlighted. The importance of selecting play equipment for playgrounds is indicated not only based on its availability and accessibility, but also based on the age-specific characteristics of the child’s perception of the environment. The scheme of using different types of children’s play equipment is proposed, depending on the age of the child (the type of child’s play). The reasons for the lack of interest of children (4–7 years old) are revealed) to the installed gaming equipment and their preferences. The subject-spatial environment is analyzed on the example of 20 playgrounds in the Maryino district of Moscow. The principles of selection of equipment in accordance with the age category of the child, and the problems of spatial placement of this game equipment, designed for children of different ages, on the playground are considered.
A Cream Formulation Of Extract Of Maja Leaves (Crescentia cujete) As An Antimicrobial Against Staphylococcus aureus
Authors: Nurjanah Siti , Mulyani Yuli Wahyu Tri , Susanti Laila , Samsuar Samsuar , Yusuf Mashuri , Meidaliyantisyah Meidaliyantisyah
Published: September 2021

Maja (Crescentia cujete L) is a plant that has medicinal properties for various diseases. Leaves of Maja contain some compounds such which are thought to have the potential to be antibacterial. The purpose of this study was to determine the potential of maja leaf extract in cream dosage form and to prove the presence of Antibacterial activity against Staphylococcus aureus. The cream of Maja leaf extract was made into several formulations; (5, 10, 15 %) The results was the cream of Maja leaf extract was able to inhibit the growth of S. aureus with the largest inhibition zone at a concentration of 15% with an average of 11.52 ± 0.95mm. Cream formulations were evaluated physically; organoleptic was resulting F1 in brownish-green, F2 in brown, and F3 in dark brown. Homogeneity tests show that all formulations were homogeneous. The pH value of all formulations following the cosmetic standard was about 4.5 – 6.5. The standard viscosity value was between 2000 – 4000 cps. The stability test of cream preparations shows no changes in the form of low-temperature storage (4ºC), room temperature, and high temperature (40ºC), so that maja leaf extracts can be formulated in cream preparations and cream formulations
Diversity and Abundance Dragonflies (Odonata) at Mount Sigogor Nature Reserve Area, Ponorogo Regency, East Java, Indonesia
Authors: Susanto Muhamad Azmi Dwi , Bahri Saiful
Published: September 2021

Mount Sigogor Nature Reserve area is a mountainous tropical rain forest, administratively located in Pupus Village, Ngebel District, Ponorogo Regency, East Java, Indonesia. One of the main functions of this nature reserve is as a water catchment area for the villages around the nature reserve area. Water sources and flows within the Mount Sigogor Nature Reserve area have the potential as natural habitat for dragonflies. This study aims to determine the diversity and abundance of dragonflies (Odonata) in the Mount Sigogor Nature Reserve Area. The method of collecting dragonflies data used the Visual Day Flying method by recording the diversity of dragonflies species and counting the number of individuals from each observed dragonflies species. The data obtained were analyzed using the Relative abundance, Shannon-Wiener Heterogeneity Index and the frequency of Presence. The results of the research conducted showed that there were 14 species from 7 families with a total of 464 individuals. The Shannor-Wiener diversity index shows that the diversity value is H'= 1.81. Meanwhile, the presence frequency analysis showed that there were four species with a value of 100% which were classified as abundant Frequency of Presence, namely Euphaea variegata, Vestalis luctuosa, Rhinocypha anisoptera and Coeliccia membranipes.
İLKOKUL FEN BİLİMLERİ DERSLERİNDE SINIF ÖĞRETMENLERİNİN SÖYLEMLERİNİN İNCELENMESİ
Authors: CANKARA Mustafa , YILMAZ Şirin
Published: September 2021

Bu araştırmanın amacı; ilkokul üçüncü sınıf, sınıf öğretmenlerinin Fen Bilimleri derslerindeki söylemlerini diyalojik öğretim çerçevesinde inceleyerek kıyaslamaktır. Yapılan kıyaslamada; öğretmenlerin Fen Bilimleri dersinde öğrenciler ile kurmuş oldukları etkileşimler, kullanmış oldukları soru-cevap, dönüt gibi yapılar detaylı olarak ele alınmıştır. Öğretmenlerin sınıf içi diyalojik ve monolojik söylemleri, öğrencilerin soru sorma, derse aktif katılma, fikir üretme ve bu fikri savunma gibi birçok becerisini de etkilemektedir. Çalışmada, nitel araştırma yöntemlerinden; çoklu durum çalışması deseni kullanılmıştır. Araştırmanın katılımcı grubunu, 2019-2020 eğitim-öğretim yılında İstanbul ilinde bulunan bir ilkokulda görev yapmakta olan gönüllü iki sınıf öğretmeni oluşturmaktadır. Araştırmada katılımcı seçimleri, amaçlı örnekleme yöntemlerinden maksimum çeşitliliğe ulaşabilmek için; kartopu örnekleme yoluyla gerçekleştirilmiştir. Maksimum çeşitliliğe ulaşıldıktan sonra (on öğretmen) ölçüt örnekleme yoluyla katılımcılar (iki öğretmen) belirlenmiştir. Araştırmanın veri kaynaklarını görüşme soruları, gözlem notları, gözlem formu ve ses kayıtları oluşturmaktadır. Araştırmaya katılan öğretmenlerin demografik bilgilerini belirlemek amacıyla görüşmeler yapılmış, sınıf içi gözlemlerde Reznitzkaya (2012) tarafından geliştirilen sınıf içi diyalojik öğretim gözlem formu kullanılmıştır. Veri analizi sürecinde betimsel analiz, söylem analizi ve gözlem notları kullanılmıştır. Araştırma sonucunda, bir öğretmenin ders işlerken kullandığı soru türleri, verdiği dönütler ve söylemlerinin, öğrencilerin üst düzey düşünme becerilerine fazla katkı sağlamadığı yönünde; diğer öğretmenin ise sınıf içi diyalogları, soru, cevap ve dönütlerinin öğrencileri düşünmeye, soru sormaya ve çıkarımda bulunmaya, günlük yaşam ile ilişki kurmaya yönlendirdiği yönünde bulgular elde edilmiştir. Elde edilen bulgular; öğretmenlerden birinin monolojik söyleme, diğerinin ise diyalojik söyleme yatkın olduğunu göstermiştir. Daha önce yapılan araştırmaların sonuçlarıyla da kıyaslamalar yapılmış olup; diyalojik söylemin önemi ve öğretmenler tarafından uygulanabilmesi için önerilerde bulunulmuştur.