bluuebunny/crossref_metadata_2025 huggingface dataset:
Endpoint estimates for a trilinear pseudo-differential operator with flag symbols
Authors: Chen Jiao , Huang Liang , Lu Guozhen
Published: June 2021

In this paper, we establish the endpoint estimate (

0
<
p
≤
1

{0<p\leq 1}

) for a trilinear pseudo-differential operator, where the symbol involved is given by the product of two standard symbols from the bilinear Hörmander class

B
⁢

S

1
,
0

0

{BS^{0}_{1,0}}

.
The study of this operator is motivated from the

L
p

{L^{p}}

(

1
<
p
<
∞

{1<p<\infty}

) estimates for the trilinear Fourier multiplier operator with flag singularities considered in
[C. Muscalu,
Paraproducts with flag singularities. I. A case study,
Rev. Mat. Iberoam. 23 2007, 2, 705–742]
and Hardy space estimates in
[A. Miyachi and N. Tomita,
Estimates for trilinear flag paraproducts on

L
∞

L^{\infty}

and Hardy spaces,
Math. Z. 282 2016, 1–2, 577–613],
and the

L
p

{L^{p}}

(

1
<
p
<
∞

{1<p<\infty}

) estimates for the trilinear pseudo-differential operator with flag symbols in
[G. Lu and L. Zhang,

L
p

L^{p}

-estimates for a trilinear pseudo-differential operator with flag symbols,
Indiana Univ. Math. J. 66 2017, 3, 877–900].
More precisely, we will show that the trilinear pseudo-differential operator with flag symbols defined in (1.3) maps from the product of local Hardy spaces to the Lebesgue space, i.e.,

h

p
1

×

h

p
2

×

h

p
3

→

L
p

{h^{p_{1}}\times h^{p_{2}}\times h^{p_{3}}\rightarrow L^{p}}

with

1

p
1

+

1

p
2

+

1

p
3

=

1
p

{\frac{1}{p_{1}}+\frac{1}{p_{2}}+\frac{1}{p_{3}}=\frac{1}{p}}

with

0
<
p
<
∞

{0<p<\infty}

(see Theorem 1.6 and Theorem 1.7).
A common range problem for model spaces
Authors: Mashreghi Javad , Ptak Marek , Ross William T.
Published: June 2021

We refine a result of [J. E. McCarthy,
Common range of co-analytic Toeplitz operators,
J. Amer. Math. Soc. 3 1990, 4, 793–799] and explore the common range of the co-analytic Toeplitz operators on a model space. The tools used to do this also yield information about when one can interpolate with an outer function.
On dynamical input reconstruction in a distributed second order equation
Authors: Osipov Yury S. , Maksimov Vyacheslav I.
Published: June 2021

A second order nonlinear differential equation is considered. An algorithm for reconstructing an input from inaccurate measurements of the solution at discrete times is designed. The algorithm based on the constructions of feedback control theory and theory of ill-posed problems is stable with respect to informational noises and computational errors.
Parameter estimation for a chaotic dynamical system with partial observations
Authors: Zhang Jiantang , Huang Sixun , Cheng Jin
Published: June 2021

Parameter estimation in chaotic dynamical systems is an important and practical issue.
Nevertheless, the high-dimensionality and the sensitive dependence on initial conditions typically makes the problem difficult to solve.
In this paper, we propose an innovative parameter estimation approach, utilizing numerical differentiation for observation data preprocessing.
Given plenty of noisy observations on a portion of dependent variables, numerical differentiation allows them and their derivatives to be accurately approximated.
Substituting those approximations into the original system can effectively simplify the parameter estimation problem.
As an example, we consider parameter estimation in the well-known Lorenz model given partial noisy observations.
According to the Lorenz equations, the estimated parameters can be simply given by least squares regression using the approximated functions provided by data preprocessing.
Numerical examples show the effectiveness and accuracy of our method.
We also prove the uniqueness and stability of the solution.
Effect of a standardized patient encounter on first year medical student confidence and satisfaction with telemedicine
Authors: Unrue Emily L. , White Grayson , Cheng Ning , Lindsey Tom
Published: June 2021

Context

Although the coronavirus 2019 (COVID-19) pandemic has accelerated the use of telemedicine platforms across the country, medical students may lack confidence in their ability to conduct satisfactory patient encounters and practice clinical medicine through telemedicine.

Objectives

To evaluate the role of a standardized patient encounter on first year medical student confidence and satisfaction in using telemedicine.

Methods

One hundred and sixty two first year medical students recruited from Edward Via College of Osteopathic Medicine-Carolinas campus were surveyed on their confidence and satisfaction with using telemedicine platforms before and after conducting a patient encounter. Participant confidence and satisfaction were assessed with a five point Likert scale: “not confident,” “a little confident,” “somewhat confident,” “confident,” and “extremely confident.”

Results

Of 162 students, 103 (63.6%) completed the preencounter survey and 74 (45.7%) completed the postencounter survey. Before the standardized patient encounter, 37 participants (35.9%) reported that they were “a little confident” and 20 participants (19.4%) reported that they were “not confident” in their ability to conduct a patient interview using a telemedicine platform. Following the encounter, 24 students (32.4%) reported feeling “somewhat confident”, and 32 (43.2%) reported feeling “confident” in their ability.

Conclusions

Medical students’ confidence and satisfaction with telemedicine improved after a standardized patient telemedicine experience in this study. This experience allowed students to practice the unique skills required for telemedicine. Medical schools might consider adding a telemedicine curriculum and standardized patient experiences in the undergraduate medical setting.
Placebo factors at healing sanctuaries in pagan and early Christian times
Authors: von Ehrenheim Hedvig
Published: June 2021

The article analyses possible placebo effects that Late Antique religious healing might have had. It focuses on healings believed to have been sent in dreams to worshippers, both in pagan and Early Christian tradition. It also investigates how possible placebo effects might have served to propagate and spread the particular cults (be it the cult of Asklepios, or the Early Christian cults of martyrs). The paper seeks to integrate modern placebo research with the ancient accounts of healings, answering the following question: is it possible that the placebo effect (above all relief of pain) was activated in ancient times by the same factors as seen in experiments today (e. g. effect of the healer’s persona, ritualized behaviour, and above all belief in the cure)? The scope of the paper is at the end broadened to touch upon the question to what degree ancient religious healing offered a socially well-established method of handling illnesses psychologically and fill the need to act, even if a cure as such was not a probable result.
Julian of Toledo and Don Yllán de Toledo:
Authors: Gerli E. Michael
Published: June 2021

Exemplum XI of Don Juan Manuel’s Libro del Conde Lucanor (“De lo que contesçió a un deán de Sanctiago con don Yllán, el grand maestro de Toledo”, ca. 1331‒1335) relates the encounter of Don Yllán de Toledo, a learnèd necromancer, and the ambitious Dean of the Cathedral of Santiago de Compostela. Exemplum XI is one of the best known and most celebrated stories in the book for its seemingly preternatural turn in the plot’s action and the characters’ visit to the Other World. The article seeks to identify Don Yllán with Archbishop Julian of Toledo (642‒690), author of the Prognosticon futuri saeculi (687), an important theological tract that circulated widely during the Middle Ages and that served as the basis for the doctrine of Purgatory. The Prognosticon contains illustrative anecdotes of dialogs with the dead and journeys to and from the Other World. As such, it endowed Julian with the legendary reputation of necromancer and probably served as inspiration for Don Juan Manuel’s Exemplum XI of El Conde Lucanor.
Subjuntivo en oraciones independientes
Authors: Sánchez López Cristina
Published: June 2021

In this paper, three cases of grammatical variation in Spanish are studied in which a subjunctive verb alternates with another verbal mood in a main clause: optative main sentences with a bare subjunctive verb (alternating with optative main sentences introduced by a conjunction or an adverb); declarative and interrogative sentences with a subjunctive verb (alternating with a conditional verb); and «retrospective imperative» sentences (where the subjunctive mood alternates with a perfect infinitive). It is proposed that, in the varieties where these main clauses with a subjunctive verb are possible, the subjunctive mood has a performative value and satisfies the illocutionary properties in Force associated with sentential modality. The performative value of subjunctive is associated with anirrealismodal base, which is provided by the lexical meaning of a modal verb or by the past perfect temporal anchoring of tense. The proposal shows that the same conditions constraint the three constructions under study and explains the coincidence between the varieties that allow the performative subjunctive (or use it more frequently).
Propuesta metodológica para el análisis de las afectaciones en la salud y confort térmico del ser humano debido al cambio climático en tres regiones de México
Authors: Gonzalez Gonzalez Francisco Roman
Published: June 2021

Este trabajo pretende analizar los efectos del cambio climático en el confort térmico y la salud del ser humano en tresregiones bioclimáticas de México (semi frío, cálido seco y cálido húmedo). A través del softwareQGIS versión 3.2.3 fue posible extraer la base de datos del modelo de circulación general (MCG) CRNMCM5 y aplicarla a modelos de confort térmico. Se analizó el comportamiento de la zona de confort térmico en tres horizontes. Además, mediante la aplicación de un modelo de predicción de temperatura central se identificaron los periodos a futuro que representarán un riesgo para la salud. Los resultados presentan un comparativo para cada región y demuestran la viabilidad de la metodología propuesta, estableciendo que el clima cálido húmedo tendrá mayores afectaciones en el bienestar térmico y la salud del ser humano.
Developing prospective teachers’ self-presentation culture in a purposefully orga-nized learning environment at university
Authors:   Altai State Pedagogical University, Spiridonova Galina Gennadievna , Kolmogorova Lyudmila Stepanovna ,   Altai State Pedagogical University
Published: June 2021

Introduction. The authors investigate the problem of developing the culture of self-presentation among future teachers at the stage of university education within the framework of classroom instruction and initiatives of the center of psychological support for students. The purpose of the article is to determine the effectiveness of a set of psychological and educational interventions aimed at organizing and managing the process of developing a self-presentation culture in future teachers based on the author's theoretical ideas about the essence of this phenomenon. Materials and Methods. The study was carried out using a formative psychological and educational experiment. The empirical data obtained were analyzed and generalized. The sample consisted of 216 students majoring in different fields of teacher education: "Primary education", "German language and English language", "English language and German language", and "Physical education". The data obtained were interpreted and subjected to statistical analysis using the Student's t-test. Results. The research findings suggest that the developed and implemented author's set of psychological and educational interventions based on the approach to describing the essence of self-presentation culture ensures its successful formation in future teachers at the stage of university education. Conclusions. The article concludes that the implementation of the set of psychological and educational interventions within classroom instruction and extracurricular activities has contributed to a significant increase in the indicators of students’ self-presentation culture. The authors note that the data obtained can be used in the practice of universities to improve the culture of self-presentation within professional and interpersonal interaction among representatives of related professions in the educational process.
Formation of psychological safety in university students through developing self-regulatory personality mechanisms
Authors:   Kemerovo State University, Morozova Irina Stanislavovna , Kargina Anastasiya Evgenievna ,   Kemerovo State University, Grinenko Daria Nikolaevna ,   Kemerovo State University, Medovikova Evgenia Aleksandrovna ,   Kemerovo State University
Published: June 2021

Introduction. The article considers the problem of psychological safety formation in future professionals at the stage of pursuing a university degree through the development of self-regulating personality mechanisms. The purpose of the research is to determine the features of the formation of psychological safety among university students through the development of self-regulating personality mechanisms. Materials and Methods. Data collection was carried out using the following inventories: H. Zakher and M. Frese’s ‘Occupational future time perspective’, S. S. Goncharova’s ‘Ways to overcome negative situations’, S. Norman, D. F. Endler, D. A. James, M. I. Parker’s ‘Coping inventory for stressful situations (adapted by T.A. Kryukova), Test of resilience by S. Muddy (adapted by D. A. Leontiev). The sample consisted of 50 senior students in the final year at university. The data obtained were interpreted and subjected to statistical analysis using Student's t-test. Results. The authors have defined the concept of ’formation of psychological safety in university students’, as a purposeful, controlled interaction of stakeholders in education which results in the systematization of ideas about psychological safety, acceptable ways of regulating one's activity, taking into account the specifics of the life situation. It has been revealed that reflexive seminars contribute to formation of psychological safety in future professionals of industrial enterprises. Conclusions. The article concludes that senior students who have participated in reflexive seminars demonstrate a detailed approach to the analysis of events in the surrounding reality, set clear goals and think over action plans, independently make decisions, appropriately respond to emerging difficulties, which are criteria for the formation of psychological safety of a person. The authors argue that the research results can be used for designing formative programs for higher educational institutions in order to enhance students’ psychological safety.
Reframing as a didactic technology of initiating a semantic choice
Authors:   Platov South-Russian State Polytechnic University, Mironenkova Natalya Nikolaevna , Abakumova Irina Vladimirovna ,   Don State Technical University
Published: June 2021

Introduction. The article addresses the problem of developing students’ value-semantic sphere by means of situations of a semantic choice as the first moment of meaning-making and application of relevant psychological technologies. The purpose of the article is to reveal the peculiarities of using reframing as a technology of initiating students’ semantic choice in order to increase inner motivation and to develop their value-semantic sphere. Materials and Methods. The research adopted meaning-centred and psycho-semantic approaches. The authors applied the methods of content analysis, systematic analysis, comparative analysis, terminological analysis, generalization and systematization. Results. The article substantiates the necessity of using a reframing technology in the learning process. The main types of reframing that can be implemented in the context of the meaning-centred approach to learning are identified – reframing of meaning and reframing of context. The authors outline the key factors of implementing a reframing technology that affect the initiation of students’ semantic choice. They include: the focus on the sensory system of the student, reliance on subjective experience of the student, use of communication (verbal and non-verbal), aspiration to the future. The authors highlight methods and techniques, including linguistic constructs, influencing the initiation of students’ semantic choice. Conclusions. The authors emphasize the potential of reframing in the learning process as a technology of psychological and educational support and a technology aimed at increasing students’ inner motivation, thereby clarifying the specificity of reframing.
Model characteristics of competition performance in terms of athletes’ functional fit-ness
Authors:   Ural State University of Physical Culture, Balberova Olga Vladislavovna , Sidorkina Elena Gennadyevna ,   Ural State University of Physical Culture, Koshkina Ksenia Sergeevna ,   Ural State University of Physical Culture, Plachy Judit Kopkáné ,   University of Miskolc, Bykov Evgeny Vitalievich ,   Ural State University of Physical Culture
Published: June 2021

Introduction. Nowadays, the theory of sports does not contain clear criteria for assessing sports fitness, which would reflect the model characteristics of competition performance. The article presents the research results on the functional state of athletes with different training process specifics as model characteristics of competition performance. The aim of the research is to identify and describe the model characteristics of competition performance as the main criterion for evaluating sports training in the theory of sports. Materials and Methods. Energy component of athletes’ functional fitness was studied in 80 qualified athletes (Candidates for Master of Sports, Masters of Sports, International Masters of Sports), specializing in running short, medium and long distances during the period of training for competitions. The study of the energy component was conducted using the inventory developed by B. F. Vashlyaev et al. (‘A method for evaluating physical performance based on minute volume of breathing dynamics ratio to increasing load power’). This method allows to identify which source of energy is used by the athlete while taking a cycle ergometer testing. Results. The authors identified the model characteristics of functional fitness in athletes with different training specifics, based on the energy component. The study provides physiological grounding from the point of view of appropriate interaction of energy supply systems. The key regulatory mechanisms associated with the metabolic reactions activation of adenosine triphosphate molecules production are described. Conclusions. Model characteristics of athletes' competition performance, obtained in this research, can be used by coaches in order to manage sports training effectively. Moreover, the identified model characteristics can be used as the main criteria for evaluating sports training in sports theory.
Responder Sin Exclusiones a las Necesidades Educativas de las Altas Capacidades
Authors: Hernández de la Torre Elena , Navarro Montaño Mª José
Published: June 2021

El objetivo de este estudio es indagar en las respuestas educativas ofrecidas por el profesorado y los propios centros a los requerimientos escolares de este alumnado con altas capacidades. En esta investigación han participado los propios protagonistas, profesorado y alumnado, ya que su opinión se considera imprescindible para conocer la atención que actualmente se les ofrece y si responde a las necesidades que se presentan cotidianamente en los centros educativos respecto a este alumnado. Hemos utilizado una metodología enfoque cualitativo con entrevistas de opinión a docentes de centros de prácticas Educación Primaria y Secundaria, así como a estudiantes de Secundaria y Bachillerato con AACC que han aceptado participar. Los resultados destacan la necesidad de trabajar los aspectos emocionales y habilidades sociales con este alumnado para su inclusión educativa y evitar la segregación, el diseño de respuestas inclusivas, no separadas y ajustadas a sus exigencias a través de Programas de Enriquecimiento y/o flexibilidad del currículum de forma abierta y flexible, la necesidad asimismo de coordinación entre profesionales para trabajar y diseñar respuestas innovadoras, nuevas estrategias de enseñanza en el aula y recursos educativos para trabajar mejor, formación específica para el profesorado en esta atención educativa y atención al contexto familiar.
Rúbrica como Instrumento para la Evaluación de Trabajos Fin de Grado
Authors: Pegalajar Mª del Carmen
Published: June 2021

Este trabajo analiza las percepciones de los estudiantes universitarios acerca del uso de la rúbrica, una vez esta ha sido validada por medio del juicio de expertos, para la evaluación del desempeño académico en la elaboración del “Trabajo Fin de Grado”. Una vez diseñada, se ha llevado a cabo su validación por parte de 10 profesores universitarios, los cuáles han determinado la validez de los criterios propuestos, así como de sus descriptores y niveles de desempeño. Posteriormente, se ha llevado a cabo un análisis cualitativo de las percepciones de los estudiantes implicados en dicha experiencia a partir de la técnica de la entrevista semi-estructurada (n = 30). Los resultados muestran que el estudiante valora de forma sobresaliente la utilización de la rúbrica en el proceso de enseñanza-aprendizaje, al disponer de una guía, un sistema de referencia con el que conocer los aspectos claves para la evaluación de los trabajos, haciendo visibles los requisitos de calidad demandados, así como el sistema de evaluación y calificación a utilizar por el profesorado. Ello facilita la actividad y autonomía del estudiante ante el aprendizaje en Educación Superior; se trata de un proceso innovador planteado en la enseñanza universitaria y que favorece la práctica educativa reflexiva en el estudiante.
Preparation of Agave tequilana Weber nanocrystalline cellulose and its use as reinforcement for acrylic hydrogels
Authors: Jiménez-Amezcua Rosa María , Villanueva-Silva Robert Josep , Muñoz-García Rubén Octavio , Macias-Balleza Emma Rebeca , Sydenstricker Flores-Sahagún María Thais Helena , Lomelí-Ramírez María Guadalupe , Torres-Rendón José Guillermo , García-Enriquez Salvador
Published: June 2021

Nanocrystalline cellulose (NCC) was prepared from Agave tequilana Weber blue variety via acid hydrolysis. The NCC was used in forming acrylic acid/acrylamide hydrogels (AA/AM), (80/20 w/w), crosslinked with N-N-methylene bisacrylamide (MBA) at addition levels of 1, 2, 4, and 8 wt% of the monomeric phase. The NCC was dosed at 0.1, 0.5, and 1.0 wt%. Two synthesis routes were used. In the first route, polymerization was performed immediately after mixing the components. In the second route, the mixture of the components was kept at 2 °C ± 1 °C for 24 h before the polymerization (thermal treatment). All the hydrogels were characterized by nuclear magnetic resonance (NMR), water absorption tests, scanning electron microscope (SEM) analysis, and rheology tests. The NCC particles had a diameter of approximately 75 nm. The hydrogels that were subjected to the thermal treatment reached the equilibrium after approximately 72 h. The un-treated hydrogels reached the equilibrium after approximately 58 h. The thermally treated samples had a lower swelling degree and the swelling degree decreased as the crosslinking degree and the NCC concentration increased. The swelling kinetics followed the Schott´s pseudo-second-order.
Management of the Influence of Organized Interests on Public Policy
Authors: Gumuliauskienė Anželika
Published: June 2021

The article analyzes the management of the influence of organized interests on public policy. The article reveals the concept of organized interests, the essential differences in comparing the concepts of organized interests and interest groups. The article takes the view that organized interests are a more neutral concept that better explains the nature of all actors seeking to influence public policy-making. The author of the article is of the opinion that the concept of interest groups – due to the disagreement of scientists in defining it – causes a lot of confusion when comparing the results of different researches and using the theoretical insights of other scientists. Organized interests interact with other public policy makers to influence policy outcomes. This article analyzes the ways in which organized interests can influence public policy. According to the author of the article, by identifying the ways of influencing public policy, it is possible to envisage ways to manage that influence. The article applies methods of analysis, synthesis, generalization and comparative analysis of scientific literature.
ON SOME FEATURES OF POST-SOVIET POLEMICS (BASED ON A REVIEW IN THE “VOPROSY LITERATURY” JOURNAL)
Authors: Esaulov Ivan
Published: June 2021

The article critically examines some techniques used in post-Soviet polemics based on the material from E. Abdullayev's note “New Understanding and old myths” (book review of Esaulov I. A. Russian Classics: New Understanding. St. Petersburg, Russian Christian Humanitarian Academy Publ., 2017) and traces the dependence of the interpretation and evaluation of the literary scientific system on the axiological views of the author of the description. At the same time, it demonstrates the influence of axiology on evaluation of philological work. The negative ideologems of the Soviet philological science and their presence in the philological practice of our time are revealed. A reduced understanding of the task of historical poetics (and poetics in general), which is characteristic of both Soviet philology and influential post-Soviet publications, prevents the construction of a new history of Russian literature and the identification of the role and place of Christian tradition in the text and subtext of works of Russian classical literature.
Features of the synthesis and biological evaluation of 3-(carboxyphenyl)chromones
Authors: Shablykina Olga , Moskvina Viktoriia , Khilya Volodymyr
Published: June 2021

Flavonoids and their derivatives have historically been a source of therapeutic agents. Every year, more and more data is published on new flavonoid compounds, both synthetic and isolated from natural sources, and their innumerable physiological and pharmacological activities. This review presents synthetic routes towards 3-(carboxyphenyl)chromones and evaluation of their biological activity as published in both journal and patent literature. We have focused specifically on the 3-(carboxyphenyl)chromones, because while methods of synthesis and biological activity of 2(3)-substituted and 2,3-disubstituted chromones are well studied, literature data on isoflavones containing a carboxyl, ester, or amide group in ring B is scarce and fragmentary. The presented generalization of synthetic strategies and biological activity of 3-(carboxyphenyl)chromone derivatives demonstrates that this class of compounds can be targeted for discovery of new drugs and can be readily prepared owing to recent advances in synthetic organic and medicinal chemistry.
Amino acid sulfonamides based on 4-(1-oxo-1H-isochromen-3-yl)benzenesulfonyl chloride
Authors: Riabchenko Anastasiia , Shablykina Olga , Shilin Serhiy , Chumachenko Svitlana , Khilya Volodymyr
Published: June 2021

The creation of new amino acid derivatives of 4-(1-oxo-1H-isochromen-3-yl)benzenesulfonyl chloride 1 was investigated. The interaction of the sulfonyl chloride 1 with amino acid methyl esters (hydrochlorides) in 1,4-dioxane in the presence of triethylamine led to the corresponding amino acid sulfonamide derivatives of isocoumarin. The reaction of the sulfonyl chloride 1 with phenylalanine in the basic aqueous solution was complicated by the lactone system disclosure and led to 2'-carboxydeoxybenzoin ultimately (namely, 2-(2-(4-(N-(1-carboxy-2-phenylethyl)sulfamoyl)phenyl)-2-oxoethyl)benzoic acid). Similar product was obtained by the alkali hydrolysis of methyl ((4-(1-oxo-1H-isochromen-3-yl)phenyl)sulfonyl)leucinate.
Information technologies and threats in cyberphysical systems for displaying information in underground metal structures with defects
Authors:   Ivan Franko National University of Lviv, R Shuvar , A Prodyvus ,   Ivan Franko National University of Lviv, V Yuzevych ,   Ivan Franko National University of Lviv,   Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, I Ogirko ,   Ukrainian Academy of Printing, O Ogirko ,   Lviv State University of Internal Affairs, R Kovtko ,   Ivan Franko National University of Lviv, R Mysiuk ,   Ivan Franko National University of Lviv
Published: June 2021

Software implementation of a system for data searching and acquisition received from measurement of underground metal structures with defects, is described. This system collects the data using sensors and sends them to the web service for further loading into the database. Information encryption algorithms for such a system are presented. The web service is suggested to use HTTPS, data transfer protocol with OAuth secret keys. The NoSQL Elasticsearch database can be encrypted and used as additional protection for the used data store. It should be noted that the search and selection of useful information concerns the electric currents and voltages obtained by measuring the sensors during non-destructive testing. The properties of cyber security and the requirements for information security are analyzed for the cyber-physical system. The types of attacks and threats in cyber-physical systems are described. The main elements of Security Metrics as a science for modeling system security are considered. The various important criteria of metals for defective underground metal structures are given. Defining the security version of a cyber-physical system helps to find changes from previous versions of the software and thus point to potential cyber security vulnerabilities. The importance of the corrosion detection stage for underground metal structures is noted. The next step is to verify the cyber-physical system for security problems using automated tools according to the criteria. The functional diagram for a secure connection in the specified system is given. Security checks of the cyber-physical system can be performed with unauthorized access to systems with error messages, codes, etc. It was pointed out that the use of cryptographic techniques is advisable to preserve the confidentiality and integrity of the cyber-physical system
Helminth Diversity in Teleost Fishes from the Area of the Ukrainian Antarctic Station “Akademik Vernadsky”, Argentine Islands, West Antarctica
Authors: Kuzmina T. A. , Dykyy I. V. , Salganskij O. O. , Lisitsyna O. I. , Korol E. M. , Kuzmin Yu. I.
Published: June 2021

Monitoring studies of the species diversity in marine ecosystems provide important data on ecological changes caused by global warming and anthropogenic influence. The present work was aimed to analyze the species diversity of the helminths parasitic in teleost fishes inhabiting the area near the Ukrainian Antarctic Station “Akademik Vernadsky” (Galindez Island, Argentine Islands, West Antarctica). During April–January of 2014–2015 and 2019–2020, 156 specimens of six fish species (Notothenia coriiceps, N. rossii, Chaenocephalus aceratus, Parachaenichthys charcoti,Trematomus bernacchii, and Harpagifer antarcticus) were examined. Totally, 21,166 specimens of 31 helminth species were collected and assigned to five taxonomic groups: Monogenea (1 species), Digenea (10), Nematoda (5), Cestoda (4), and Acanthocephala (11). Twenty-six helminth species were found in N. coriiceps, 14 in N. rossii, 27 in P. charcoti, 23 in Ch. aceratus, 16 in T. bernacchii, and six in H. antarcticus. Larval stages of anisakid nematodes prevailed in the helminth community of Ch. aceratus (66 %) and P. charcoti (40 %), while other fish species were mostly infected with acanthocephalans,trematodes and cestodes. The present data on the species diversity of helminth communities can be used as a baseline for long-term monitoring studies of fish parasites in the region of the Argentine Islands.
Modeling the bioclimatic range of Pterostichus melanarius (Coleoptera, Carabidae) in conditions of global climate change
Authors: Avtaeva T. A. , Sukhodolskaya R. A. , Brygadyrenko V. V.
Published: June 2021

At present, climate change significantly affects living organisms on the planet, leading to transformations in their niches, ranges and abundance. The aim of our work was to forecast the range of the representative of the large family Carabidae, famous for its indicative characters, richness and importance in soil communities. We used 19 bioclimatic variables of Bioclim according to our own data and the data of GBIF with the help of the MaxEnt program. We used 550 coordinates of ground beetle Pterostichus melanarius (Illiger, 1798) records. We distinguished the potential range the species studied and drew prognostic maps of the species’ distribution related to climate change according to four scenarios. Mean annual temperatures and the mean temperature in the warmest and the coldest quarters of the year were the major factors affecting spatial distribution of P. melanarius. Visualization of potential range according to RCP 2.6, RCP 4.5 and RCP 6.0 scenarios predicted range reduction by 2050 but its recovery by 2070. According to RCP 8.5 scenario, the range of the species studied will be significantly transformed: by 2070 the range will shift towards the north-west in the continental European states but to the northeast – in the coastal states. By 2070 almost all southern territories of Europe will become unsuitable for P. melanarius survival. The most visible changes will be the shift in range to the north in the eastern part of the European plain. The comfort conditions for P. melanarius decrease in mountain regions including the Alps, Carpathians, Caucasus and Urals. By 2070, the cenotic optimum significantly decreases on the Balkan Peninsula. Thus, a sharp reduction in Southern European and Mediterranean populations is predicted.
First records of Echimys saturnus Thomas, 1928 (Rodentia, Echimyidae) for the Peruvian Yungas
Authors: Juárez-Pérez Yangjosé , Sánchez-Vendizú Pamela , Leo Mariella , Shanee Sam , Ramos Jhonny , Pacheco Víctor
Published: June 2021

Echimys saturnus Thomas, 1928 is an echimyid rodent that has been recorded in lowland, premontane and montane forests in Ecuador and lowland forests in Peru. Here, we report five new records of this species in the Peruvian Yungas ecoregion. Our records come from Amazonas, San Martín, and Huánuco departments. The Huánuco specimen, collected at 3300 m a.s.l., constitutes the highest and the southernmost record for the species, extending its distribution range by 251 km south. Additionally, we provide some notes on the natural history and conservation status of the species.
From material properties to multiscale modeling to improve lithium-ion energy storage safety
Authors: Hewson John C. , Zhou Hanwei , Parmananda Mukul , Shurtz Randy C. , Mukherjee Partha P.
Published: June 2021

Energy storage using lithium-ion cells dominates consumer electronics and is rapidly becoming predominant in electric vehicles and grid-scale energy storage, but the high energy densities attained lead to the potential for release of this stored chemical energy. This article introduces some of the paths by which this energy might be unintentionally released, relating cell material properties to the physical processes associated with this potential release. The selected paths focus on the anode–electrolyte and cathode–electrolyte interactions that are of typical concern for current and near-future systems. Relevant material processes include bulk phase transformations, bulk diffusion, surface reactions, transport limitations across insulating passivation layers, and the potential for more complex material structures to enhance safety. We also discuss the development, parameterization, and application of predictive models for this energy release and give examples of the application of these models to gain further insight into the development of safer energy storage systems.
Body Composition of Chronic Kidney Disease Patients
Authors: Bakshi Anjani , Singh Kalyani , Siddhu Anupa
Published: June 2021

With accelerated muscle proteolysis, a decrease in muscle mass is evident in chronic kidney disease (CKD) patients. This eventually leads to nutritional disturbance that for a long has been mostly attributed to malnutrition. This predisposes patients to premature morbidity and mortality. Assessing body composition, thus, becomes vital. In this cross-sectional study, CKD patients (n = 47) of stages 2, 3a, 3b and 4 were assessed for their lean tissue mass, adipose tissue mass and overhydration by body composition monitor. Lean tissue index and fat tissue index were calculated as lean tissue mass and adipose tissue mass in kilogram divided by patients’ height in square meters. Patients were assessed for their handgrip strength (HGS) by Jamar hydraulic hand dynamometer, and also for their 7-day diet history. Mean lean tissue index of CKD patients was 11.73 ± 2.49 kg/m2. About 34 (72.3%) out of 47 patients were below the reference value of lean tissue index. A significant difference in lean tissue index (P = 0.03) was observed at various stages. Patients at stage 4 had the lowest lean tissue index. Lean tissue was significantly (P = 0.03) low in patients consuming protein <0.6 gm/kg/day. All 47 patients had less than normal HGS values. Patients’ mean fat tissue index was 14.86 ± 6.18 kg/m2 and had water retention with a mean overhydration of 1.47 ± 2.12 L. CKD patients were malnourished with a significant low lean tissue index. Dietary protein intake and HGS of these patients were positively associated with lean tissue index.
Uzaktan Eğitim Sistemlerinde Kişisel Hakların Korunması: Türkiye’deki Üniversitelerin Koronavirüs Salgını (COVID-19) Sürecine Yönelik Değerlendirme
Authors: Henkoğlu Türkay , Şerefoğlu Henkoğlu Halise
Published: June 2021

Koronavirus salgını (COVID-19) nedeniyle üniversitelerde eğitim ve öğretime uzaktan eğitim sistemleri (UES) aracılığıyla devam edilmektedir. Bu süreçte UES kullanıcılarının kişisel hakların korunması ve bu sistemlere güven duymalarının sağlanması, UES’nin etkinliği ve başarısının ön koşulu olarak görülmektedir. Bu çalışmada, kişisel hakların korunması çerçevesinde UES’de kullanılan içeriğin eser sahibi, öğretim elemanları ve öğrencilere ilişkin yansımaları ile uzaktan eğitim merkezlerinin ve uzaktan eğitim faaliyetlerinde görev alan bilgi profesyonellerinin bu konudaki sorumluluklarının incelenmesi amaçlanmaktadır. Bu amaç doğrultusunda, UES’nin kullanımına yönelik kişisel haklar incelenmiş ve Türkiye’deki tüm üniversitelerin kullanmakta oldukları UES’lerin hukuksal koşullar ile uyumluluğu araştırılmıştır. Araştırma kapsamında Türkiye’deki 200 üniversitenin web sitelerinde yer alan uzaktan eğitim sürecine ilişkin açıklamalar, haber ve duyuru metinleri, kullanım kılavuzları (rehberler) ve uzaktan eğitim uygulama usul ve esaslarına ilişkin dokümanlar ile kullanıcıların kişisel haklarına yönelik hukuksal düzenlemeler incelenerek veri toplanmıştır. Elde edilen verilere bağlı olarak, kişisel hakların korunmasına ilişkin üniversitelerin sergilediği tutum, UES’de kişisel hakların korunmasına yönelik yaklaşımın hukuksal düzenlemeler ile uyumluluğu ve COVID-19 salgını sürecinde kişisel hakların korunmasına yönelik hukuksal sorumluluklar çerçevesinde alınan güvenlik önlemlerinin yeterliliği değerlendirilmiştir. Çalışmada elde edilen sonuçlar, hızlı bir geçiş süreci içinde geliştirilen UES çözümlerinin kişisel hakların korunması konusunda yetersiz olduğunu ve özellikle verilerin saklanmasına yönelik asgari güvenlik standartlarının belirlenmesine ihtiyaç duyulduğunu göstermektedir. Çalışmanın son bölümünde, uzaktan eğitim sürecine katılım sağlayan ve farklı hukuksal sorumlulukları bulunan öğrenciler, öğretim elemanları, veri sorumlusu, bilgi profesyonelleri, uzaktan eğitim merkezi yetkilileri ve Yükseköğretim Kurulu’nun göz önünde bulundurması gereken birçok farklı noktaya dikkat çekilerek önerilerde bulunulmuştur.
Öğrencilerin Bilgi Okuryazarlığı Becerilerinin Değerlendirilmesi: Çankırı Karatekin Üniversitesi, Türk Dili ve Edebiyatı Bölümü Örneği
Authors: Mandıracı Tuğba , Zan Burcu Umut
Published: June 2021

Bu çalışmanın temel amacı Çankırı Karatekin Üniversitesi Türk Dili ve Edebiyatı (TDE) bölümünde öğrenim gören 1.sınıf öğrencilerinin bilgi okuryazarlığı becerilerini ve farkındalıklarını ölçmektir. Bu kapsamda yürütülen çalışmanın örneklemini, belirtilen bölümde eğitim gören 79 öğrenci oluşturmaktadır. Çalışmadan önce öğrencilerin ön bilgilerini kontrol etmek amacı ile bilgi okuryazarlığı ölçeği ön testi uygulanmış, grupların ön bilgilerinin eş değer olduğu saptanmıştır. Deneysel desen yönteminin uygulandığı bu çalışmada kontrol grubuna geleneksel yöntemle ders anlatımı yapılırken, deney grubuna bilgi okuryazarlığı ile bütünleştirilmiş ders anlatımı uygulanmış ve kontrol ile deney gruplarının ön ve son testlerden aldığı sonuçlar karşılaştırılmıştır. Ayrıca çalışma kapsamı içinde hem kontrol hem de deney gruplarına 120 dakikalık ders anlatımı yapıldıktan sonra araştırma performans görevi verilmiştir. Öğrencilerin hazırladığı araştırma performans görevleri bilgi okuryazarlığı temellerine göre araştırmacılar tarafından hazırlanan rubrik baz alınarak değerlendirilmiştir. Çalışma sonucunda bilgi okuryazarlığı eğitiminin deney grubunda performans görevi temelinde beklenilen yeterliliği geliştiremediği ancak deney grubunun ön test ve son test puanları arasında istatistiksel olarak pozitif yönde anlamlı bir değişim gösterdiği ve dolayısıyla öğrencilerin bilgi okuryazarlığı konusundaki farkındalıklarının arttığı saptanmıştır. Bununla birlikte kontrol grubu öğrencileri performans görevi temelinde deney grubu öğrencilerinden daha yüksek puanlar almasına rağmen ön test puanları ile verilen eğitim sonrasında yapılan son test puanları arasında istatistiksel olarak anlamlı bir farklılık olmadığı tespit edilmiştir. Çalışma sonucunda 120 dakikalık bilgi okuryazarlığı ile bütünleştirilmiş eğitimin, öğrencilerin bu konudaki farkındalıklarını artırdığı ancak bilgi okuryazarlığı becerilerinin geliştirilmesinde yetersiz kaldığı sonucuna ulaşılmıştır. Bilgi okuryazarlığı ile bütünleştirilmiş ders eğitiminin daha geniş bir zamana yayılarak; uygulama, ödevler ve farklı yöntemler ile desteklenmesi önerilmektedir.
Ujęcie i wycena umowy ubezpieczenia według MSSF 17
Authors: Spigarska Ewa
Published: June 2021

Objective: The purpose of the article is to present the significant changes IFRS 17 introduces in relation to the requirements of IFRS 4. Changes in the valuation of insurance contracts and the impact on reporting by insurance companies are presented. Indicating different approaches to the insurance contract, both for the legal and balance sheet purposes, is a second aim.Research Design & Methods: A number of techniques was used to accomplish the study, including a broad analysis of legal acts regulating the concept of insurance contracts, an analysis of specialist literature, and comparability analysis techniques. An additional source of the information was financial statements from PZU Group preparing its reports annually in accordance with the requirements of the International Financial Reporting Standards.Findings: Based on the research conducted, it was found that the recognition of an insurance contract for the purposes of balance sheet law is an approach that deviates from the applicable code definitions. However, the methodology for the valuation of insurance contracts will change, affecting the financial result achieved by insurance companies and the value in use of their financial statements. This will require the creation of new criteria for assessing the profitability of their activities. However, the assessment of the actual impact of these changes will be the subject of further research.Implications / Recommendations: The introduction of the new IFRS 17 standard will require a change in the accounting policy of insurance companies using International Financial Reporting Standards in order to maintain the comparability of financial statements both in domestic and international aspects.Contribution: The article looks at how the regulations concerning accounting in insurance companies will affect the value in using financial statements drawn up by insurers.
Archaea, bacteria and termite, nitrogen fixation and sustainable plants production
Authors: SUN Wenli , SHAHRAJABIAN Mohamad H. , CHENG Qi
Published: June 2021

Certain bacteria and archaea are responsible for biological nitrogen fixation. Metabolic pathways usually are common between archaea and bacteria. Diazotrophs are categorized into two main groups namely: root-nodule bacteria and plant growth-promoting rhizobacteria. Diazotrophs include free living bacteria, such as Azospirillum, Cupriavidus, and some sulfate reducing bacteria, and symbiotic diazotrophs such Rhizobium and Frankia. Three types of nitrogenase are iron and molybdenum (Fe/Mo), iron and vanadium (Fe/V) or iron only (Fe). The Mo-nitrogenase have a higher specific activity which is expressed better when Molybdenum is available. The best hosts for Rhizobium legumiosarum are Pisum, Vicia, Lathyrus and Lens; Trifolium for Rhizobium trifolii; Phaseolus vulgaris, Prunus angustifolia for Rhizobium phaseoli; Medicago, Melilotus and Trigonella for Rhizobium meliloti; Lupinus and Ornithopus for Lupini, and Glycine max for Rhizobium japonicum. Termites have significant key role in soil ecology, transporting and mixing soil. Termite gut microbes supply the enzymes required to degrade plant polymers, synthesize amino acids, recycle nitrogenous waste and fix atmospheric nitrogen. The positive effects of Arbuscular mycorrhizal (AM) fungi such as growth promotion, increased root length, leaf area, stem diameter, transplant performance and tolerance to stresses have been reported previously.
Comparison of photosynthetic fluorescence characteristics of several submerged plants in Honghu Lake, China
Authors: ZHU Yuan-Qin , JING Bo-Han , YUAN Long-Yi
Published: June 2021

Submerged plants are the pioneer species of eutrophic water remediation, and they are important for maintaining the health of aquatic ecosystem, while light is the main limiting factor for the growth of submerged plants. In this study, we measured the maximal quantum yields of photosystemⅡ(Fv/Fm) and rapid light curves (RLCs) of five dominant submerged macrophytes in situ by using pulse-amplitude modulated fluorometer (Diving-PAM). Results revealed that P. crispus L. and M. verticillatum L. had the highest Fv/Fm value, all species’ Fv/Fm are less than 0.8. In addition, the variation trends of Fv'/Fm' and Fv/Fm were same. All species showed statistically significant differences in α, while P. crispus L. and M. verticillatum L. showed the highest α value in the five species. And the variation trends of rETRm and Ek were basically the same. It indicated that P. crispus L. and M. verticillatum L., both of which had high photosynthetic efficiency, had excellent ability to withstand hard light. Compared five species, P. crispus L. and M. verticillatum L. had resistance capacity to hard light as well as faster photosynthetic rate, and V. natans (Lour.) Hara had higher resistance capacity to low light. Thus, when submerged plants are used for water restoration, V. natans (Lour.) Hara could be regarded as a pioneer species in eutrophication water restoration. P. crispus L. and M. verticillatum L. will have better effects when used in shallow water areas.