bluuebunny/crossref_metadata_2025 huggingface dataset:
THE ADORNMENTS OF SCYTHIAN AGE OF THE POPULATION OF FOREST-STEPPE: INTRODUCTION TO THE TOPIC ON THE MATERIALS FROM DNIEPER LEFT-BANK AREA
Authors: Khodukina Y. M.
Published: November 2021

This paper focuses on the pins and earrings as the most popular and diverse type of Scythian jewelry. They are exactly the chronological and cultural markers used by researchers in the reconstruction of migrations and connections of the forest-steppe population.

The adornments in ancient times, as well as nowadays, were one of the main cultural and social identity markers. First, they have been studied both in the context of the Scythian material remnants and the unique local variants. Vladimira Petrenko was one of the first who made the typology of these artifacts which led to the change in the field. Soon, new findings were discovered that developed the typology of the artifacts, which was based on the local variants and peculiar decorations, e. g. earrings. The common feature of the modern research is to lessen the number of taxa in the typological scheme and determine the precise and rare indicators of the type origin. Even though the adornment of Scythian Age were studied just as a part of the material culture, the consensus of the academia shows that jewelries can represent a wide range of social and cultural processes in ancient communities.

Usually, the Scythian adornments are found in the burial and settled sites. Such material remnants combined with the anthropological data and certain fixation can enlarge our understanding of the usage and function of these artifacts. Furthermore, they give us knowledge of the possible popular costume of the time, the sex and age differences in fashion. In addition, new finds from the settlements widen the source base. The analysis of the jewelries in the context of the settlement structures gives a more precise chronology and modes of production. Today, it is sure that the main three technological methods were welding, casting, and smiting. Each method related to the distinct forms and metals the item was made of.
NEW EXHIBITS OF ITEMS WITH CHAMPLEVE ENAMELS IN SUMY REGIONAL MUSEUM (PRELIMINARY REPORT)
Authors: Bilynska L. I. , Bilyk V. M. , Buhay O. M. , Hopkalo O. V. , Gorokhovskyi Ye. L. , Derevianko О. M.
Published: November 2021

During 2018—2020 items with Champleve enamels were presented to Sumy Regional Museum by Sumy residents, S. I. Gutsan and R. A. Bobkov. They were shown at an exhibition dedicated to the 100th anniversary of the Museum in September 2020. The collection consists of more than 70 items (tabl. 1). There are brooches (horseshoe-shaped, triangular, round), pendants (cruciform, lunnula), chains, bracelets, diadems, torques, appliquй, finger-rings, trapezoidal pendants, spurs etc. Because these finds were kept in private collections and were presented to the Museum by their owners, the items could be considered accidental finds except location of them was more or less accurate.

Preliminary analysis of things from the collection allowed us to determine the following. The area of finds includes different areas of Sumy region, but those found in Sumy’s suburbs significantly dominate, and by dating they mostly belong to the second stage of development of East European Champleve enamels, according to E. Gorokhovskyi — to the middle and second half of 3rd century. Metal and enamel of things were analyzed by the researchers of The Institute of Applied Physics of NASU using an X-ray fluorescence spectrometer.

Situation around archeological monuments requires a rapid reconstruction, adaptation of science to new unfavorable conditions. This publication is prompted by an attempt to obtain maximum information from sources whose reliability is questionable. Moreover, the things analyzed in this publication are of great importance for solving many important questions of archeology, in particular, for the reconstruction of the Slavonic peoples’s genesis.
THE COMPOSITION OF THE POPULATION BURIED AT THE SCYTHIAN AGE CEMETERY NEAR SVITLOVODSK CITY (ACCORDING TO CRANIOLOGY)
Authors: Kruts S. I. , Rudych T. O.
Published: November 2021

The anthropological composition of the population buried at the cemetery of the Scythian Age near Svitlovodsk city (Kirovograd region) is analyzed in the paper. The burial ground is located on the border of the Forest-Steppe and Steppe Zones of the Right Bank of the Dnieper. The anthropological material under study comes from cemetery without mounds. Archaeologists date the main massif of burials to the 4th century BC.

The anthropological composition of the population that was buried at this burial ground was not homogenous.

The male series of skulls is characterized by a long, medium-wide, high, dolichocranic skull. The face is of medium size, it is mesognathic. The horizontal profile of the face at the upper level is medium, but with a tendency to the sharp; at the middle level, the face is strongly profiled. The orbital and nasal indexes are medium. The bones of the nose are moderately protruding.

The average characteristics of the male population fit into the range of variations of the Scythian series. The male series belongs morphologically and statistically to the circle of the steppe Scythian groups. The male group from the burial ground near the city of Svitlovodsk is close to the series from the Nikolaevka burial ground on the Dnister River, the group of skulls from the burial mounds near the village of Shirokoe (Left Bank of the Dnieper River), the group of skulls from the burial mounds near the village of Vyshchetarassivka, a series of skulls from the Mykhailivka burial ground.

Of the forest-steppe series, only the combined group of skulls from the Trypillya region is somewhat close to it.

All these statistically and morphologically similar groups originate from different territories. This illustrates the specifics of the settlement and demonstrates the mobility of the Scythian groups.

The female series from the burial ground is characterized by a long, narrow, medium-high skull, mesocranic in shape. The size of the face is small, it is mesognathic. The horizontal profile of the face at the upper level is moderate, at the zygomaxilar level it belongs to the category of sharp, but with a tendency to moderate. The orbital index is medium, the nasal index belongs to the large category. The bones of the nose are medium protruding.

The female series from Svitlovodsk burial ground turns out to be the most gracile among the Scythian series in Ukraine. For this reason, it differs significantly from the entire massif of the steppe Scythian series. The closest to the Svitlovodsk series is a group from mounds near Nikopol.
THE POPULATION OF CHERNYAKHIV CULTURE, WHICH IS BURIED IN THE CEMETERY NEAR THE VILLAGE OF VELYKA BUGAIVKA, ACCORDING TO CRANIOLOGY
Authors: Rudych T. O.
Published: November 2021

Cemetery of Chernyakhiv culture near the Velyka Buhaivka village was excavated in 1995—2005 by an expedition of O. V. Petrauskas and R. G. Shishkin. During the excavations the anthropological material was obtained.

The male series is characterized by a medium-long, narrow, medium-high, dolichocranial cranium. The face is short, narrow, mesognathic. Horizontal face profiling is sharp. Orbits are medium high, the nose is medium wide. The angle of the nasal bones is on the border of medium and large values. The nose is of medium height.

According to the results of statistical analysis, the group from Velyka Buhaivka is close to the series from the cemeteries of Romashki, Kurnyky, Ranzheve. The group is closer to the series of Welbark culture Maslomench, Grudek, a bit closer to the Welbark mixed series of the Lower Vistula, than to individual series of Chernyakhiv culture from the territory of Ukraine.

The female group is characterized by a long, medium-wide on the border with a wide, medium-high, dolichokranny cranium.

The face is medium-wide and medium-high, orthognathic. The orbits were medium high, the nose was medium wide. Horizontal profiling of the face at the upper level is on the border of sharp and moderate, its profiling at the zygomaxillary level is sharp. The angle of the nasal bones is medium, the epiglottis is medium high.

According to the results of the analysis, the women’s series from Velyka Buhaivka is closest to the women from Chernyakhiv, Zhuravka, Popivka.

From the groups of Polish Welbark culture the mixed group of Slovinsko-Drawska is close to the women from Velyka Buhaivka.

The dolichocranium narrow-faced type was dominant in people buried by inhumation. It is recorded in the people buried in the graves accompanied by the grave goods of the phase C2, C2—C3, D1. This type is present both in burials directed with the head to the North, and to the West.
STUDY OF THE HOARD OF SILVER COINS NEAR HORODNYTSIA VILLAGE
Authors: Alferov O. A. , Motsya B. O. , Petrauskas A. V.
Published: November 2021

Minting own coin is one of the attributes of state formation. The first coins of the Old Rus are represented by gold and silver specimens dating from the late tenth — early eleventh century. Gold coins are very rare, the silver ones are presented much more.

Most modern researchers believe that the production of silver coins was started by Volodymyr Sviatoslavych and ended under Yaroslav Volodymyrovych after the beginning of his reign in Kyiv. In 2020 the third known hoard of silver coins was discovered near Gorodnytsia village, Novohrad-Volynskyi district, Zhytomyr region. It was found accidently by local resident S. M. Komar who in the next day after discovery handed it over to the authorities which was recorded in the relevant documents.

The expedition of the Institute of Archaeology of the National Academy of Sciences of Ukraine conducted archaeological research at the hoard location. The place where the silver coins have been occurred was recorded. Several more coins were found in the pit where the hoard was and nearby. Surrounding area was examined. Near the hoard the presence of land- and waterways, which functioned in the medieval period, was recorded. Near the river Sluch there are convenient places for crossing.

During the exploration of the area adjacent to the hoard in order to study the archaeological context the settlement was discovered. The artifacts found on it date it to the 9th—13th and 16th—18th centuries. Powerful fortifications in the form of moats, ramparts and escarpments have been preserved. Probably, the formation of the silver hoard is connected with the ancient roads along the Sluch River and the Old Rus settlement on the site of the modern settlement of Gorodnytsia.

In total 38 silver coins were in the hoard. 31 of them belonged to the minting of Volodymyr Sviatoslavych, and 7 to Sviatopolk Yaropolkovych. Vladimir’s coins are presented in three types — II (6 copies), III (16 copies) and IV (9 copies). Sviatopolk’s coins represent all three of his existing numismatic types — I (4 copies), II (2 copies) and III (1 copy). 10 silver coins of Volodymyr and 1 of Svyatopolk are represented by previously unknown stamp pairs. 2 coins of Vladimir, which have an unknown combination of stamps, are of particular scientific interest.
Ultrasonographic examination of skeletal muscles in traumatic ischemia (experimental study)
Authors: Strafun Serhii , Pidlisetsky Andriy , Savosko Serhii , Gaiovych Igor , Dolhopolov Oleksii
Published: November 2021

Post-traumatic muscles ischemia of the extremities is the result of severe trauma and leads to permanent dysfunction. The tactics of management and treatment of patients are decisive at all stages, so the latest methods of treatment using cellular technologies are being developed to prevent the development of complications and improve long-term results.
Aim: to determine the correlation between histological and ultrasonographic parameters (qualitative and quantitative) in the muscles after traumatic ischemia and to compare the results.
Material and methods. The study was performed on rabbits breed Chinchilla. The animals were placed on a tourniquet on the lower limb from the middle third of the thigh to the ankle joint, after 6 hours it was removed. Developed software to determine the texture of the sonographic image (δ-entropy) allowed to assess the qualitative and quantitative changes in the damaged muscles. Correlation analysis was performed between sonographic and histological changes in the muscles.
Results. The relative amount of structurally altered tissue was morphometrically estimated and compared with entropy. A high correlation between muscle damage and vertical δ-entropy has been found, indicating that high-probability sonography can detect areas of necrosis and, to a lesser extent, fibrosis in the development of ischemic limb contracture.
Conclusions. The obtained high positive correlation between the histological index of muscle tissue damage (especially atrophy of muscle fibers and fibrosis) and the results of sonographic data processing, namely vertical δ-entropy, have clinical importance in terms of establishing the severity of necrotic lesions segments of the extremities and the prediction of fibrous changes, formation of limb contracture.
Key words: traumatic ischemia, necrosis, histological changes in the muscles.
MODELING REACTION MECHANISM OF GLUTAMATE CARBOXYPEPTIDASE – A MEMBER OF THE POLYENZYME CHAIN OF N-ACETYLASPARTATE
Authors: Khrenova M.G. , Krivitskaya A.V.
Published: November 2021

Computational methods of molecular modeling are used to simulate the reaction mechanism of hydrolysis of N-acetyl-L-aspartyl-L-glutamate catalyzed by glutamate carboxypeptidase II to N-acetylaspartate and glutamate.
DOES PROTEOMIC MIRROR REFLECT CLINICAL CHARACTERISTICS OF OBESITY?
Authors: Kiseleva O.I. , Poverennaya E.V. , Pyatnitskiy M.A. , Ilgisonis E.V. , Zgoda V.G. , Plotnikova O.A. , Sharafetdinov K.K. , Lisitsa A.V. , Tutelyan V.A. , Nikityuk D.B. , Archakov A.I. , Ponomarenko E.A.
Published: November 2021

Protein patterns were collected, the presence or absence of which allows a fairly good prediction of the patient's weight. Such proteomic patterns with high predictive power should facilitate the transformation of potential biomarker candidates for clinical use for the early stratification of obesity therapy.
NEURAL NETWORK AS AN APPROACH TO THE CLASSIFICATION OF UNASSIGNED LC-MS DATA IN PROTEOMETABOLOMICS
Authors: Petrovsky D.V.
Published: November 2021

Proteomic (MASCOT, Andromeda, OMSSA, etc.) and metabolomic (Scripps, AMDIS, etc.) search algorithms for identification are limited to reference libraries and, as a result, a large amount of data is lost (modified proteins, isoforms). Bypassing the identification stage, you can significantly increase the amount of data for classification tasks. This makes it possible to successfully cluster the studied classes at the cost of information on molecular categorical predictors.
ANALYTICAL SYSTEMS BASED ON RECOMBINASE POLYMERASE AMPLIFICATION FOR RAPID DETECTION OF VIRAL, VIROID AND BACTERIAL PLANT PATHOGENS
Authors: Ivanov A.V. , Zherdev A.V. , Dzantiev B.B.
Published: November 2021

Test systems have been developed for the detection of phytopathogens, combining recombinase polymerase amplification and membrane test strips. Test systems provide detection of potato virus X, potato spindle tuber viroid, potato blackleg pathogen (Dickeya solani), as well as multi-analysis of three viruses. Amplification is carried out at 37 °C. The analysis time does n ot exceed 30 min.
APPLICATION OF BIOLUMINESCENT METHODS TO STUDY STRESS EFFECTS ON LIVING SYSTEMS
Authors: Lomakina G.Yu.
Published: November 2021

Bioluminescent methods based on firefly luciferase for detecting the effect of membrane-active agents (antibiotics and saponins) on living prokaryotic and eukaryotic cells have been developed. New data on the kinetics and mechanism of action of colistin on E. coli cells and digitonin cells on NEK293 cells were obtained. Examples of the use of constitutive and inducible luciferase reporters in cell biology are given.
SHAPE MEMORY EFFECT AND PIEZOELECTRIC EFFECT
OF POLYMER COMPOSITE MATERIALS BASED ON POLYLACTIDE FOR ADAPTIVE MEDICAL STRUCTURES
Authors: Senatov F.S. , Surmenev R.A. , Pariy I.О.
Published: November 2021

The activation parameters of the Shape memory effect of polylactide were reduced by creating a polymer-polymer composite material based on it. The improved material was used to obtain porous scaffolds by electro-spinning, the shape memory effect and the piezoelectric effect were studied for these scaffolds.
HIGHLY SENSITIVE IMMUNOASSAY WITH PEROXIDASE-MIMICKING NANOPARTICLES
Authors: Safenkova I.V. , Zherdev A.V. , Dzantiev B.B.
Published: November 2021

Bi (Au@Ag)-and trimetallic (Au@Ag-Pt) nanoparticles with peroxidase-mimicking activity were synthesized. The nanoparticles were used for lateral flow immunoassay of phytopathogens and inflammatory biomarker. Low values of the limit of detection were achieved thanks to the unique optical and catalytic properties of the nanoparticles.
BIOCOMPOSITE MATERIALS WITH ANTIBACTERIAL AND HEMOSTATIC PROPERTIES BASED ON BACTERIAL CELLULOSE
Authors: Koryakova K.A. , Bataykina V.A. , Mavrina A.S. , Liyaskina A.Y. , Tyusheva A.E. , Revin V.V.
Published: November 2021

Biocomposite materials with antibacterial and hemostatic properties based on native and oxidized bacterial cellulose and sodium fusidine in the form of hydrogels and aerogels were obtained.
ASYMMETRIC DEPTH-FILTRATION – A VERSATILE AND SCALABLE APPROACH FOR ISOLATION AND PURIFICATION OF EXTRACELLULAR VESICLES
Authors: Chuprov-Netochin Roman N. , Svirshchevskaya Elena V. , Poltavtseva Rimma A. , Merdalimova Anastasiia , Yashchenok Alexey , Keshelava Amiran , Sorokin Konstantin , Keshelava Varlam , Sukhikh Gennadiy T. , Gorin Dmitry , Leonov Sergey , Skliar Mikhail
Published: November 2021

A new method that is based on asymmetric depth-filtration was developed and tested for isolation of extracellular vesicles (EVs) from biological fluids such as human plasma, urine, Wharton's jelly and cell culture. Results showed that such method can be a reliable alternative for EV research and their application in medicine.
THE USE OF HYDROLYTIC ENZYMES TO INCREASE THE EFFICIENCY OF THERAPY OF INFECTIONS ASSOCIATED
WITH THE FORMATION OF BACTERIAL BIOFILM
Authors: Baidamshina D.R. , Holyavka M.G. , Trizna E.Y. , V.A. Koroleva , Olshannikova S.M.
Published: November 2021

The successful destruction of biofilm structures and the significant decrease of non-specific bacterial adhesion to the surfaces after either Ficin or Papain treatment have been detected. The combination of enzymes with antimicrobials increased the efficacy of the latter against biofilm-embedded bacteria. Moreover, Ficin treatment lead to smoother reepithelisation, and new tissue formation exhibiting collagen structure characteristics closely reminiscent of those observed in the native tissue. Thus, both soluble and immobilized Ficin and Papain appear beneficial for the treatment of biofilm-associated infections, speeding up wound healing and microbial decontamination.
Зважене гасіння зовнішніх і початкових збурень у дескрипторних системах керування
Authors: Mazko A. G.
Published: November 2021

УДК 517.925.51; 681.5.03Дослiджується проблема узагальненого -керування для класу лiнiйних дескрипторних систем. Запропоновано критерiй та достатнi умови iснування законiв керування, при яких замкнена система є регулярною, стiйкою, неiмпульсною i гарантується бажана оцiнка зваженого рiвня гасiння зовнiшнiх i початкових збурень. Основнi обчислювальнi процедури синтезу регуляторiв зводяться до розв’язання лiнiйних i квадратичних матричних нерiвностей без рангових обмежень. Наведено приклад робастної стабiлiзацiї гiдравлiчної системи з трьома резервуарами.
Опис класу строго диференційовних скінченностанових ізометрій кільця
Authors: Morozov D. I.
Published: November 2021

УДК 512+517.98
Умова строгої диференційовності є посиленням поняття диференційовності, природним для застосування до класу -адичних функцій. Дану статтю присвячено дослідженню строгої диференційовності скінченностанових ізометрій кільця
Different type parameterized inequalities for preinvex functions with respect to another function via generalized fractional integral operators and their applications
Authors: Kashuri A. , Sarikaya M. Z.
Published: November 2021

UDC 517.5The authors have proved an identity with two parameters for differentiable function with respect to another function via generalized integral operator. By applying the established identity, the generalized trapezium, midpoint and Simpson type integral inequalities have been discovered. It is pointed out that the results of this research provide integral inequalities for almost all fractional integrals discovered in recent past decades. Various special cases have been identified. Some applications of presented results to special means and new error estimates for the trapezium and midpoint quadrature formula have been analyzed. The ideas and techniques of this paper may stimulate further research in the field of integral inequalities.
Certain subclasses of meromorphically -starlike functions associated with the -derivative operators
Authors: Srivastava H. M. , Tahir M. , Khan B. , Darus M. , Khan N. , Ahmad Q. Z.
Published: November 2021

UDC 517.5
The purpose of the present paper is to establish several general results concerning the partial sums of meromorphically starlike functions defined here by means of a certain class of -derivative (or -difference) operators. The familiar concept of neighborhood for meromorphic functions are also considered. Moreover, by using a Ruscheweyh-type -derivative operator, we define and study another new class of functions emerging from the class of normalized meromorphic functions.
The zeros of the Lerch zeta-function are uniformly distributed modulo one
Authors: Garunkštis R. , Panavas T.
Published: November 2021

UDC 511.311We prove that the ordinates of the nontrivial zeros of the Lerch zeta-function are uniformly distributed modulo one.
Fertilizantes minerales para café en Colombia Consideraciones técnicas
Authors: Sadeghian Siavosh , Duque Orrego Hernando
Published: November 2021

La aplicación correcta de fertilizantes en aspectos relacionados con dosis, fuente, sitio, forma y época, contribuye a la adecuada nutrición de las plantas y favorece la obtención de cosechas abundantes y de buena calidad. Este Avance Técnico tiene como propósito entregar información acerca de los fertilizantes minerales de uso frecuente en Colombia y algunas consideraciones para su selección, cuando de café se trata.
Dispositivos para el óptimo funcionamiento hidráulico de Sistemas Modulares de Tratamiento Anaerobio.
Authors: Rodríguez-Valencia Nelson , Castañeda Samuel Antonio , Osorio-Ocampo Andres Felipe , Quintero-Yepes Laura
Published: November 2021

Para el tratamiento de las aguas residuales del beneficio del café provenientes del lavado del grano en los tanques de fermentación, Cenicafé desarrolló los Sistemas Modulares de Tratamiento Anaerobio, conocidos como SMTA. En este Boletín Técnico con el fin de estimular la implementación de los SMTA se diseñaron varios dispositivos que permiten la optimización del funcionamiento de los equipos en las fincas cafeteras, con el fin de que se obtengan aguas tratadas que cumplan con los requerimientos exigidos en la normativa ambiental vigente.
Integritás a rendvédelem „SZEM”-ével – avagy a szilárd erkölcsiség rendvédelemspecifikus jellemzői a korrupciómegelőzés szolgálatában
Authors: Hertelendi Lajos
Published: November 2021

This book, which the dear reader takes with interest in his/her hands, is not written in the usual style, although in terms of its content it can be said that it is a well-crafted volume of studies. The topic itself is not ordinary. The term ‘SZEM’ model certainly reminds many people of something else than solid morality measurement. However colleagues with knowledge in academia, on the other hand, will know that we are talking about Ajzen and Fishbein’s model, one of the known theories of predicted behavior for predicting behavior (e.g., unhealthy behaviors), which has been used successfully in several areas, e.g. in social psychology, transport psychology. The volume of studies and the brigade of the elaborative work were prepared by dr. Malét-Szabó Erika and prof. dr. Ákos Münnich, furthermore we can thank the the colleagues of Professor Münnich at the University of Debrecen, who put together the content. In addition to these, dr. Judit Hegedüs, head of the Department of Behavioral Sciences at University of Publice Service Faculty of Law Enforcement, presents the practical experiences of the model.
More traveling waves in the Holling-Tanner model with weak diffusion
Authors: Manukian Vahagn , Schecter Stephen
Published: November 2021

We identify two new traveling waves of the Holling-Tanner model with weak diffusion. One connects two constant states; at one of them, the model is undefined. The other connects a constant state to a periodic wave train. We exploit the multi-scale structure of the Holling-Tanner model in the weak diffusion limit. Our analysis uses geometric singular perturbation theory, compactification and the blow-up method.
Global existence of weak solutions to inhomogeneous Doi-Onsager equations
Authors: Chen Wenji , Zhou Jianfeng
Published: November 2021

In this paper, we study the inhomogeneous Doi-Onsager equations with a special viscous stress. We prove the global existence of weak solutions in the case of periodic regions without considering the effect of the constraint force arising from the rigidity of the rods. The key ingredient is to show the convergence of the nonlinear terms, which can be reduced to proving the strong compactness of the moment of the family of number density functions. The proof is based on the propagation of strong compactness by studying a transport equation for some defect measure, \begin{document}$ L^2 $\end{document}-estimates for a family of number density functions, and energy dissipation estimates.
Erratum: Existence and uniqueness of solutions of free boundary problems in heterogeneous environments
Authors: Wang Mingxin
Published: November 2021

The proof of Theorem 1.1 in [Mingxin Wang, Discrete Cont. Dyn. Syst. B. 24(2)(2019), 415-421] contains a mistake. In this erratum, we point out the correct version of this estimate.
Classification with Runge-Kutta networks and feature space augmentation
Authors: Giesecke Elisa , Kröner Axel
Published: November 2021

In this paper we combine an approach based on Runge-Kutta Nets considered in [Benning et al., J. Comput. Dynamics, 9, 2019] and a technique on augmenting the input space in [Dupont et al., NeurIPS, 2019] to obtain network architectures which show a better numerical performance for deep neural networks in point and image classification problems. The approach is illustrated with several examples implemented in PyTorch.
Effect of the incorporation of BiFeO3 on the structural, electrical and magnetic properties of the lead-free Bi0.5Na0.5TiO3
Authors: Zúñiga-Mera Wolfgang ,   Department of Physics, Science and Technology of Ceramic Materials Group (CYTEMAC), University of Cauca, Popayan, Colombia, Jurado Sonia Gaona , Duymovic Alejandra Isabel Guerrero , Raigoza Claudia Fernanda Villaquirán , García José Eduardo ,   Department of Applied Physics, Polytechnic University of Catalunya, c/Jordi Girona 1-3, B4, 08034, Barcelona, Spain
Published: November 2021

Powders of the system (1–x)Bi0.5Na0.5TiO3–xBiFeO3 (x = 0, 0.02, 0.08, 0.10) are synthesized by the combustion reaction method. The crystal structure and the particle size of Bi0.5Na0.5TiO3 are modified by the incorporation of BiFeO3, as can be seen from the infrared spectroscopy and X-ray diffraction results. The inclusion of iron and the increase in the molar percentage of bismuth in the BNT matrix generate new bonds with a different force constant. The structural analysis showed that the addition of BFO to the BNT does not induce any structural phase transition, preserving the rhombohedral symmetry of the Bi0.5Na0.5TiO3 system. The electrical measurements show that the incorporation of iron increases the conductivity of the system generated by an increase in the concentration of oxygen vacancies; alternatively, the addition of 10% of BiFeO3 generates ferrimagnetic behavior reflected in the magnetic hysteresis curves obtained at room temperature.
On a class of bent, near-bent, and 2-plateaued functions over finite fields of odd characteristic
Authors: Bajrić Samed ,   Laboratory for Open Systems and Networks, Jozef Stefan Institute, 1000 Ljubljana, Slovenia
Published: November 2021

The main purpose of this paper is to study a class of the $ p $-ary functions $ f_{\lambda, u, v}(x) = Tr_1^k(\lambda x^{p^k+1})+Tr^n_1(ux)Tr_1^n(vx) $ for any odd prime $ p $ and $ n = 2k, \lambda\in GF(p^k)^*, u, v\in GF(p^n)^*. $ With the help of Fourier transforms, we are able to subdivide the class of all $ f_{\lambda, u, v} $ into sublcasses of bent, near-bent and 2-plateaued functions. It is shown that the choice of $ \lambda, u $ and $ v $, ensuring that $ f $ is bent, 2-plateaued or near-bent, is directly related to finding the subset $ A\subset GF(p)^3 $. The efficient method for defining the set $ A\subset GF(p)^3 $ is described in detail.
On three dimensional fractal dynamics with fractional inputs and applications
Authors: Goufo Emile Franc Doungmo ,   Department of Mathematical Sciences, University of South Africa, Florida 0003, South Africa, Atangana Abdon ,   Institute for Groundwater Studies, University of the Free State, Bloemfontein 9300, South Africa
Published: November 2021

The environment around us naturally represents number of its components in fractal structures. Some fractal patterns are also artificially simulated using real life mathematical systems. In this paper, we use the fractal operator combined to the fractional operator with both exponential and Mittag-leffler laws to analyze and solve generalized three-dimensional systems related to real life phenomena. Numerical solutions are provided in each case and applications to some related systems are given. Numerical simulations show the existence of the models' initial three-dimensional structure followed by its self- replication in fractal structure mathematically produced. The whole dynamics are also impacted by the fractional part of the operator as the derivative order changes.
Study of the Atangana-Baleanu-Caputo type fractional system with a generalized Mittag-Leffler kernel
Authors: Jeelani Mdi Begum , Alnahdi Abeer S. , Almalahi Mohammed A. , Abdo Mohammed S. , Wahash Hanan A. , Abdelkawy M. A.
Published: November 2021

We devote our interest in this work to investigate the sufficient conditions for the existence, uniqueness, and Ulam-Hyers stability of solutions for a new fractional system in the frame of Atangana-Baleanu-Caputo fractional operator with multi-parameters Mittag-Leffler kernels investigated lately by Abdeljawad (Chaos: An Interdisciplinary J. Nonlinear Sci. Vol. 29, no. 2, (2019): 023102). Moreover, the continuous dependence of solution and $ \delta $-approximate solutions are analyzed to such a system. Our approach is based on Banach's and Schaefer's fixed point theorems and some mathematical techniques. In order to illustrate the validity of our results, an example is given.
Forecast of the COVID-19 trend in India: A simple modelling approach
Authors: Song Haitao ,   Complex Systems Research Center, Shanxi University, Taiyuan 030006, China, Fan Guihong , Zhao Shi , Li Huaichen , Huang Qihua , He Daihai ,   Department of Mathematics, Columbus State University, Columbus 31907, USA,   JC School of Public Health and Primary Care, Chinese University of Hong Kong, Hong Kong, China,   Department of Pulmonary and Critical Care Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China,   School of Mathematical and Statistical Sciences, Southwest University, Chongqing 400715, China,   Department of Applied Mathematics, Hong Kong Polytechnic University, Hong Kong, China
Published: November 2021

By February 2021, the overall impact of the COVID-19 pandemic in India had been relatively mild in terms of total reported cases and deaths. Surprisingly, the second wave in early April becomes devastating and attracts worldwide attention. Multiple factors (e.g., Delta variants with increased transmissibility) could have driven the rapid growth of the epidemic in India and led to a large number of deaths within a short period. We aim to reconstruct the transmission rate, estimate the infection fatality rate and forecast the epidemic size. We download the reported COVID-19 mortality data in India and formulate a simple mathematical model with a flexible transmission rate. We use iterated filtering to fit our model to deaths data. We forecast the infection attack rate in a month ahead. Our model simulation matched the reported deaths well and is reasonably close to the results of the serological study. We forecast that the infection attack rate (IAR) could have reached 43% by July 24, 2021, under the current trend. Our estimated infection fatality rate is about 0.07%. Under the current trend, the IAR will likely reach a level of 43% by July 24, 2021. Our estimated infection fatality rate appears unusually low, which could be due to a low case to infection ratio reported in previous study. Our approach is readily applicable in other countries and with other types of data (e.g., excess deaths).
Infection spread simulation technology in a mixed state of multi variant viruses
Authors: Koizumi Makoto ,   PhD, Former researcher of Hitachi Ltd., Hitachi City, Ibaraki Prefecture, Japan, Utamura Motoaki , Kirikami Seiichi ,   PhD, PE, Former professor, Tokyo Institute of Technology, Tokyo, Japan,   Scholar, Former engineer of Hitachi Ltd., Hitachi City, Ibaraki Prefecture, Japan
Published: November 2021

ATLM (Apparent Time Lag Model) was extended to simulate the spread of infection in a mixed state of the variant virus and original wild type. It is applied to the 4th wave of infection spread in Tokyo, and (1) the 4th wave bottoms out near the end of the state of emergency, and the number of infected people increases again. (2) The rate of increase will be mainly by d strain (L452R) virus, while the increase by a strain (N501Y) virus will be suppressed. (3) It is anticipated that the infection will spread during the Olympic Games. (4) When variant viruses compete, the infection of highly infectious virus rises sharply while the infection by weakly infectious ones has converged. (5) It is effective as an infection control measure to find an infected person early and shorten the period from infection to quarantine by PCR test or antigen test as a measure other than the vaccine.
A sindemia persistente: doenças crônicas e a Covid-19 no Sistema Prisional do Distrito Federal em 2020
Authors: Loureiro João Vitor Rodrigues
Published: November 2021

O artigo analisa, à luz do conceito de sindemia, proposto por Merrill Singer, os efeitos da disseminação da doença causada pelo novo Coronavírus (Covid-19) em estabelecimentos prisionais do Distrito Federal em 2020. O artigo consiste em uma análise exploratória dos dados disponíveis e reconhece que, apesar das limitações de dados e de um menor número de internações e doenças crônicas na população do sistema prisional distrital, é possível aplicar parcialmente o conceito de sindemia para a Covid-19 entre a população objeto deste estudo.
Review on Mapping of Tasks to Resources in Cloud Computing
Authors: Vinothina V.  , Jasmine Beulah G.  , Rajagopal Sridaran
Published: November 2021

Resource allocation and scheduling algorithms are the two essential factors that determine the satisfaction of cloud users. The major cloud resources involved here are servers, storage, network, databases, software and so on based on requirements of customers. In the competitive scenario, each service provider tries to use factors like optimal configuration of resources, pricing, Quality of Service (QoS) parameters and Service Level Agreement (SLA) in order to benefit cloud users and service providers. Since, many researchers have proposed different scheduling algorithms and resource allocation strategies, it becomes a cumbersome task to conclude which ones really benefit customers and service providers. Hence, this paper analyses and presents the most relevant considerations that would help the cloud researchers in achieving their goals in terms of mapping of tasks to cloud resources.
Integrated Predictive Experience Management Framework (IPEMF) for Improving Customer Experience
Authors: Kumbhojkar Neelesh Ragunath , Menon Arun Balakrishna
Published: November 2021

Enterprises are adopting digital transformation with an exponential rate to drive growth through new business models and the use of digital technologies. Digital transformation is a business imperative rather than technology imperative. Hence, customer experience during and post-transformation is key to the success of the digital transformation. The present paper proposes an Integrated Predictive Experience Management Framework (IPEMF) for improving customer experience. IPEMF is- a structured and methodological business processes centric connected experience framework with the customer at the centre. The uniqueness of IPEMF is that it seamlessly integrates business processes, technology, organisation, and customer behaviour. It is agnostic of the business vertical or the geography. The framework puts forth an approach to predict the impact on customer experience proactively and provides a feedback loop to help continuously improve the experience. IPEMF helps enterprises build intuitive, trusted relationships and hyper-personalised customer experience through the customer journey.
Application of Water Cycle Algorithm to Stochastic Fractional Programming Problems
Authors: Agrawal Prachi , Ganesh Talari , Mohamed Ali Wagdy
Published: November 2021

This paper presents an application of Water Cycle algorithm (WCA) in solving stochastic programming problems. In particular, Linear stochastic fractional programming problems are considered which are solved by WCA and solutions are compared with Particle Swarm Optimization, Differential Evolution, and Whale Optimization Algorithm and the results from literature. The constraints are handled by converting constrained optimization problem into an unconstrained optimization problem using Augmented Lagrangian Method. Further, a fractional stochastic transportation problem is examined as an application of the stochastic fractional programming problem. In terms of efficiency of algorithms and the ability to find optimal solutions, WCA gives highly significant results in comparison with the other metaheuristic algorithms and the quoted results in the literature which demonstrates that WCA algorithm has 100% convergence in all the problems. Moreover, non-parametric hypothesis tests are performed and which indicates that WCA presents better results as compare to the other algorithms.
A Novel Discrete Binary Gaining-Sharing Knowledge-Based Optimization Algorithm for the Travelling Counselling Problem for Utilization of Solar Energy
Authors: Hassan Said Ali , Agrawal Prachi , Ganesh Talari , Mohamed Ali Wagdy
Published: November 2021

This article proposes a novel binary version of recently developed Gaining-Sharing knowledge-based optimization algorithm (GSK) to solve binary optimization problems is proposed. GSK algorithm is based on the concept of how humans acquire and share knowledge during their life span. Discrete Binary version of GSK named novel binary Gaining Sharing knowledge-based optimization algorithm (DBGSK) depends on mainly two binary stages: binary junior gaining sharing stage and binary senior gaining sharing stage with knowledge factor 1. These two stages enable DBGSK for exploring and exploitation of the search space efficiently and effectively to solve problems in binary space.An improved scheduling of the technical counselling process for utilization of the electricity from solar energy power stations is introduced. The scheduling aims at achieving the best utilization of the available day time for the counselling group,n this regard,a new application problem is presented, which is called a Travelling Counselling Problem (TCP).A Nonlinear Binary Model is introduced with a real application
Exploring the Continuing Professional Development (CPD) Needs of Basic Schoolteachers in Ghana
Authors: Abakah Ellen
Published: November 2021

This study aims to understand teachers’ perceptions of their professional development needs and examine how these needs are utilised to design CPD interventions for teachers in Ghana. The study uses a qualitative case study research approach to collect data from 25 teachers and five key informants in in-depth interviews. The results demonstrate teachers’ on-going learning needs in pedagogical content knowledge, technology integration in teaching and learning, and school and student management practices. Teachers also revealed that existing CPD interventions inadequately address their specific development needs. Teachers expressed their lack of voice and self-directedness in CPD program planning, design, and implementation, which they attributed as a significant cause of CPD ineffectiveness. Thus, the study recommends that teachers’ learning needs be formed as the pivot around which CPD is organised; to increase teacher participation and CPD program effectiveness.
Fostering bacterial growth in BFT aquaculture tanks by early Nile tilapia stocking
Authors: Lima Francisco Roberto dos Santos , Cavalcante Davi de Holanda , Sá Marcelo Vinícius do Carmo e
Published: November 2021

The current study aimed at fostering bacterial growth in BFT aquaculture tanks by early Nile tilapia stocking. Control tanks had no tilapia but received daily applications of dry molasses (NT+) or had tilapia but no C:N ratio adjustment (T-). Experimental tanks had tilapia and received daily application of molasses to adjust the C:N ratio of water to 15:1 (T+). The development of bioflocs in NT+ was insignificant as demonstrated by low levels of settleable solids (SS) and total suspended solids (TSS). Total ammonia nitrogen (TAN) was significantly higher in NT+ than in T+. In the C:N-ratio adjusted tanks, the presence of fish shortened the control of TAN in several days. As nitrite declined in T+, it increased in NT+. The final concentrations of TSS in T+, T- and NT+ were 236 ± 29 mg L-1, 100 ± 32 mg L-1, and 40 ± 22 mg L-1, respectively (p < 0.05). It can be concluded that stable nitrifying and heterotrophic bacterial communities could be attained in BFT aquaculture tanks, before the end of the 4th week of culture, if the bacterial growth is fostered by early Nile tilapia stocking.
Floristic diversification of spreading liverseed grass pasture according to different cutting intensities, obtained by grazing simulation
Authors: Marchi Sidnei Roberto de , Marques Ricardo Fagundes , Souza Rodrigo Marques de , Araújo Prissila Pereira dos Santos , Silva Ilgner Thiago Duarte
Published: November 2021

This study aimed to evaluate the impacts of different forage cutting intensities, obtained by grazing simulation, on the floristic diversity and productivity of a pasture cultivated with spreading liverseed grass. The experiment was set up in a randomized block design, with four replications and treatments arranged in a 5 × 2 factorial scheme, with five levels of cutting intensity of the simulated grazing (0, 25, 50, 75, and 95% of the forage canopy) associated with two levels of weed coexistence (presence and absence). The evaluations of floristic diversity, number of individuals, and total dry matter of weeds were obtained at 15, 30, 45, 60, and 90 days after grazing simulation (DAGS). All plots were evaluated at the end of the experimental period (90 DAGS) for the amount of dry biomass produced by the pasture. The results showed that higher forage cutting intensities, obtained by grazing simulation, increased the floristic diversity, the number of individuals, and the dry matter accumulated by weeds in a pasture grown with spreading liverseed grass, reducing by up to 56% the production of total dry matter of the forage.
The influence of black spot disease on the relative condition factor of Astyanax paranae Eigenmann, 1914 (Characiformes: Characidae) in Brazilian subtropical streams
Authors: Barrilli Germano Henrique Costa , Moura Evelise Nunes Fragoso de , Rocha Odete , Verani José Roberto
Published: November 2021

Environmental disturbances and their consequences require constant studies to understand how communities and their ecological relationships respond to these processes. Through analysis of the host-parasite relationships, it is observed that the effect of these disturbances is variable and can change the physiology or behavior of organisms. Black spot disease, caused by endoparasitic helminths, is a pathology observed in natural environments, however, there is not much information about the consequences of this infestation. We separated the specimens from each stream into parasitized and non-parasitized groups, which were subjected to biometric analysis. The biometrics involved cysts count and weight-length measures, which were used to analyze the average relative condition factor. Additionally, we correlate these measures with the parasitic burden of infected individuals. Finally, the parasitized individuals were submitted to histological sections to recognize the parasite. The results demonstrate a low physiological condition in the parasitized group, when compared with non-parasitized groups from the same stream and from different streams. This suggests that pollution, in addition to effects of infestation worsen the fish condition. Besides, the parasite burden was negatively correlated with the condition factor, weight and length measures. We conclude that the parasite burden negatively affects Astyanax paranae individuals´ physiological condition and that trematodes also occur in polluted environments.
Potential use of lemongrass essential oil as fungicide against Aspergillus brasiliensis and as post-harvest protectant of wheat
Authors: Lee Lundoi Tobias , Martinazzo Ana Paula , Teodoro Carlos Eduardo de Souza , Berbert Pedro Amorim
Published: November 2021

Fungi are among the main responsible for damage and loss in stored grains, its control has been done through synthetic substances, which are harmful to man and the environment. Brazil, one of the leading countries in agriculture, has optimal environmental conditions for the development of mycotoxigenic fungi. Most of the synthetic chemicals used as preservatives have often been realized to be toxic to humans and also cause adverse environmental effects. Thus, it is necessary to search for alternative methods of controlling. In this study the aimed was to evaluate the efficacy of lemongrass essential oil in the control of the Aspergillus brasiliensis. In vitro and serial microdilution tests were carried out at different concentrations of essential oil and citral, which corresponds to 72% of the total oil composition. Inhibition of fungal growth on contaminated wheat grain was evaluated. The in vitro test results showed that the essential oil has fungicidal potential at concentrations from 0.6 μL mL-1, the minimum inhibitory concentration was determined at 0.8 μL mL-1. The tests with citral showed fungal control at concentrations from 0.6 μL mL-1 onwards. For wheat grain, fungal growth inhibition was obtained at the concentration of 1.6 μL mL-1. The essential oil of Cymbopogon flexuosus showed fungicidal activity against the fungus Aspergillus brasiliensis.