bluuebunny/crossref_metadata_2025 huggingface dataset:
Game Theory Without Partitions, and Applications to Speculation and Consensus
Authors: Geanakoplos John
Published: June 2021

Decision theory and game theory are extended to allow for information processing errors. This extended theory is then used to reexamine market speculation and consensus, both when all actions (opinions) are common knowledge and when they may not be. Five axioms of information processing are shown to be especially important to speculation and consensus. They are called nondelusion, knowing that you know (KTYK), nested, balanced, and positively balanced. We show that it is necessary and sufficient that each agent's information processing errors be (1) nondeluded and balanced so that the agents cannot agree to disagree, (2) nondeluded and positively balanced so that it cannot be common knowledge that they are speculating, and (3) nondeluded and KTYK and nested so that agents cannot speculate in equilibrium. Each condition is strictly weaker than the next one, and the last is strictly weaker than partition information.
From the herringbone dome by Sangallo to the Serlio floor of Emy (and beyond)
Authors: Roberti Giulio Mirabella , Ruscica Giuseppe , Paris Vittorio
Published: June 2021

The research starts from an analogy found between two apparently very different structural solutions: the double spiral pattern of the herringbone brick courses in the domes built by Antonio da Sangallo the Younger (1484-1546) during the Renaissance, and the particular pattern of a wooden floor ‘à la Serlio’, described by Amand Rose Emy in his Treatise at the beginning of 19th century, made by diagonal beams reciprocally sustained. The diagonal pattern of the floor has a geometrical relationship with the cross-herringbone pattern, so that the latter can be obtained by some geometrical transformations of the former. This pattern was also used in thin shells built by Nervi, from the destroyed airplane hangars in Tuscany to the Palazzetto dello sport in Rome, and even by Piacentini in 1936 and earlier in some neoclassical domes. Thus the construction tool, useful for building domes without expensive scaffolding, could have a structural role at the completed construction stage. Within the research different structures were investigated, in order to observe the relevance of this peculiar structural scheme particularly in the construction of modern domes.
Global and local properties of finite groups with only finitely many central units in their integral group ring
Authors: Bächle Andreas , Caicedo Mauricio , Jespers Eric , Maheshwary Sugandha
Published: June 2021

The aim of this article is to explore global and local properties of finite groups whose integral group rings have only trivial central units, so-called cut groups. For such a group, we study actions of Galois groups on its character table and show that the natural actions on the rows and columns are essentially the same; in particular, the number of rational-valued irreducible characters coincides with the number of rational-valued conjugacy classes. Further, we prove a natural criterion for nilpotent groups of class 2 to be cut and give a complete list of simple cut groups. Also, the impact of the cut property on Sylow 3-subgroups is discussed. We also collect substantial data on groups which indicates that the class of cut groups is surprisingly large. Several open problems are included.
Analysis of COVID-19 outbreak origin in China in 2019 using differentiation method for unusual epidemiological events
Authors: Radosavljevic Vladan
Published: June 2021

Objectives

Origin of outbreaks could be natural, accidental, deliberate, and caused by a new or re-emerging bioagent. The aim of this study was the retrospective analysis of whether the COVID-19 outbreak was natural, accidental, deliberate one, or caused by a new or re-emerging bioagent.

Methods

Analysis was performed according to the Radosavljevic–Belojevic method for outbreak scoring and differentiation. Data for the application of this method were obtained by literature review in the Medline database for the period from 2000 to 2020.

Results

The analysis of the unusual COVID-19 outbreak shows that the present official assumption of its natural origin is questionable and pointed out to a probability that the pathogen could have also been accidentally introduced in the human population.

Conclusion

There are no conclusive pieces of evidence about the reservoir of the pathogen or the source of infection. These parameters are essential for the final clarification of the outbreak origin. This study suggests that the COVID-19 outbreak is a consequence of an accidental release of a new COVID-19 virus, probably during the technical accident and/or negligent violation of hygienic norms in the laboratory facility. Further epidemiological, microbiological, and forensic analyses are needed to clarify the COVID-19 outbreak.
Ultrasound-enhanced biosynthesis of uniform ZnO nanorice using Swietenia macrophylla seed extract and its in vitro anticancer activity
Authors: Low Darren Yi Sern , Mahendra Camille Keisha , Supramaniam Janarthanan , Tan Loh Teng Hern , Lee Learn Han , Manickam Sivakumar , Goh Bey Hing , Tan Khang Wei , Tang Siah Ying
Published: June 2021

In this study, ultrasonically driven biosynthesis of zinc oxide nanoparticles (ZnO NPs) using Swietenia macrophylla seed ethyl acetate fraction (SMEAF) has been reported. X-ray powder diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) analyses confirmed the presence of a pure hexagonal wurtzite structure of ZnO. Field emission scanning electron microscope images revealed the formation of uniquely identifiable uniform rice-shaped biologically synthesized ZnOSMEAF particles. The particle sizes of the biosynthesized NPs ranged from 262 to 311 nm. The underlying mechanisms for the biosynthesis of ZnOSMEAF under ultrasound have been proposed based on FTIR and XRD results. The anticancer activity of the as-prepared ZnOSMEAF was investigated against HCT-116 human colon cancer cell lines via methyl thiazolyl tetrazolium assay. ZnOSMEAF exhibited significant anticancer activity against colon cancer cells with higher potency than ZnO particles prepared using the chemical method and SMEAF alone. Exposure of HCT-116 colon cancer cells to ZnOSMEAF promoted a remarkable reduction in cell viability in all the tested concentrations. This study suggests that green sonochemically induced ZnO NPs using medicinal plant extract could be a potential anticancer agent for biomedical applications.
The choice of information sources and marketing channel of Bali cattle farmers in Bali Province
Authors: Dewi Ni Made Ari Kusuma , Syahlani Suci Paramitasari , Haryadi Fransiskus Trisakti
Published: June 2021

The aims of this research were to calculate marketing efficiency and to identify the information sources of cattle farmers who select direct or indirect channel of cattle selling. This study used a descriptive research design. Respondents in this research were determined by quota and judgmental sampling methods. Data were collected through observation and in-depth interviews. Data collected were analyzed descriptively. The results showed that 66.67% and 33.33% of farmers selected indirect channel and direct channel, respectively. Among the latter, all the farmers sold to butcher, inter-island traders, or end consumers on Muslim religious ceremony. Indirect channel farmers obtained 83.72% of producer’s share, while in the direct selling method farmers obtained the entire share. However, marketing efficiency of indirect marketing channel was better with 20.22 than the direct marketing channel with 29.70. Furthermore, in the direct marketing channel, most farmers received information from buyers (25.86%) and farmers in the indirect marketing channel received from family members (20.29%). All farmers obtained similar impersonal information from televised media. In conclusion, farmers in direct channel received more income but indirect marketing channel gave a better marketing efficiency. Lastly, majority of farmers in both channels received information from personal sources.
On the similarity to nonnegative and Metzler Hessenberg forms
Authors: Grussler Christian , Rantzer Anders
Published: June 2021

We address the issue of establishing standard forms for nonnegative and Metzler matrices by considering their similarity to nonnegative and Metzler Hessenberg matrices. It is shown that for dimensions n 3, there always exists a subset of nonnegative matrices that are not similar to a nonnegative Hessenberg form, which in case of n = 3 also provides a complete characterization of all such matrices. For Metzler matrices, we further establish that they are similar to Metzler Hessenberg matrices if n 4. In particular, this provides the first standard form for controllable third order continuous-time positive systems via a positive controller-Hessenberg form. Finally, we present an example which illustrates why this result is not easily transferred to discrete-time positive systems. While many of our supplementary results are proven in general, it remains an open question if Metzler matrices of dimensions n 5 remain similar to Metzler Hessenberg matrices.
Is There an AI Cold War?
Authors: Bryson Joanna J. , Malikova Helena
Published: June 2021

Regulation is a means societies use to create the stability, public goods, and infrastructure they need to thrive securely. This policy brief is intended to both document and to address claims of a new AI cold war: a binary competition between the United States and China that is too important for other powers to either ignore or truly participate in directly, beyond taking sides. We argue that while some of the claims of this narrative are based at least in part on genuine security concerns and important unknowns, evidence for its extreme binary nature is lacking. This absence of factual evidence is concerning, because related geopolitical tensions may be used to interfere with regulation of AI and agencies associated with its development. Here we first document and then analyze the extremely bipolar picture prominent policymakers and political commentators have been recently painting of the AI technological situation, portraying China and the United States as the only two global powers. We then examine the plausibility of these claims using two measures: internationally registered AI patents and the market capitalization of the companies that hold them. These two measures, while each somewhat arbitrary and imperfect, are often deployed in the context of the binary narrative and can therefore be seen as conservative choices in that they should favor exactly the “champions” of that narrative. In fact, these measures do not produce bipolar results: Chinese capacity has been exaggerated and that of other global regions deprecated. These findings call into question the motivation behind the documented claims, though they also further illuminate the uncertainty concerning digital technology security. We recommend that all parties engage in contributing to a safe, secure, and transparent regulatory landscape.
La mentira nociva según Miguel Catalán.
Authors: Díaz Seijas Raquel
Published: June 2021

Desde hace algunos años, vengo leyendo -y analizando- con gran interés los volúmenes de la historia y formas de la mentira y el engaño desde todos los aspectos humanísticos posibles que tan rigurosamente ha trabajado el Profesor Miguel Catalán a lo largo de su vida, con la finalidad de analizar, en último término, la ética aplicada al ordenamiento social.  En las páginas publicadas en los volúmenes de esta amplia obra  he aprendido que toda gran mentira necesita de una pequeña verdad que la sustente (desde el primer hasta el último volumen de Seudología confirman esta necesidad), he aprendido que hay mentiras piadosas - que no son precisamente las religiosas- que conducen  a la creatividad de mundos mejores, incluso a través del pataleo del perdedor o de la protesta marginal del que no es escuchado en la palestra;  un ejemplo hermoso lo hemos visto en la creación de la utopía como protesta política y como género literario; he aprendido que uno es veraz cuando es paternal con sus hijos, pero que se adentra por los caminos de la mentira interesada cuando es paternalista con los  “adultos”  a los que pretende engañar y someter.  A lo largo de todos estos volúmenes nos hemos topado con los paternalismos religiosos, con los paternalismos políticos, con los paternalismos económicos y publicitarios, y los hemos estudiado desde los mitos, las tradiciones, las políticas dictatoriales, los populismos más sangrantes, recorriendo todos los aspectos humanísticos del hombre y todas las ciencias sociales tanto de Oriente como de Occidente.

Hoy quiero reflexionar un poco más en detalle sobre La mentira nociva. Seudología XI, siendo el primer libro póstumo del Profesor Miguel Catalán, si bien previamente ya había escrito otros dos volúmenes que el autor quería dejar como cierre de toda la serie de Seudología.   Por ello cabe destacar que, mientras escribo estas líneas, acaba de publicarse La traición. Seudología XII, el último volumen que ha editado este año la Editorial Verbum, y en breve saldrá el último tomo que versará sobre la mentira benéfica, según hemos podido saber a través de su viuda, María Picazo, fiel colaboradora en esta inmensa obra. Rematará así esta maravillosa historia del ser humano, que ha ganado tantos premios, y que ya he ido mencionando en otras ocasiones: los Premios de Ensayo Juan Gil-Albert y Alfons El Magnànim, el Premio de Ensayo e Investigación Juan Andrés, así como el de la Crítica Valenciana. De los tomos nuevos tendremos ocasión de hablar en un futuro, por lo que, como señalaba, dedicaré este pequeño estudio a La mentira nociva. Seudología XI.
Making blends of agarwood waste with empty palm bunches or rubber wood sawdust for pelletized biofuels
Authors: Limhengha Suphatchakorn , Mahathaninwong Narissara , Chucheep Thiensak , Karrila Seppo , Tipayanon Thanapat
Published: June 2021

This study created biomass-pellet fuel with reduced ash content from agarwood waste mixed with empty palm bunches (ACW+EPB), and from agarwood waste with rubber wood sawdust (ACW+RWS), utilizing the low ash value of the agarwood waste. The tested blends had a 1:1 ratio of agarwood waste and empty palm bunches, and a 1:3 ratio of agarwood waste and rubber wood sawdust. Comparisons were also conducted relative to Korean (Grade 4) (2014) and ENplus B (2014) commercial pellet standards. Before pressure molding, the mixture components were dried and ground in a pelletizing device with a motor power of 7.5 kW (380 V, 50 Hz), yielding 100 to 150 kg/h without added adhesive. The test results showed that ACW ash content decreased in the RWS hybrid, yet increased in the EPB mixture. The attributes of ash content, moisture content, and heating value of ACW+RWS satisfied ENplus B (2014) and Korean (Grade 4) (2014) standards at 1.70%, 4.50%, and 4,536 kcal/kg. The ACW+EPB also satisfied the Korean (Grade 4) standard at 4.20%, 6.50%, and 4,220 kcal/kg. Thus, the biomass pellets from the mixture of agarwood waste and rubber wood sawdust and that of agarwood waste and empty palm bunches were of suitable quality for commercial purposes.
Comparison of variability in results of acoustic tomographs in pedunculate oak (Quercus robur L.)
Authors: Cristini Valentino , Tippner Jan , Vojáčková Barbora , Paulić Vinko
Published: June 2021

Tree acoustic tomography is a widely used device supported method for tree stability assessment. In this work, the results of the three most commonly used devices for acoustic tomography of standing trees (ARBOTOM®, ArborSonic®, and PiCUS®) were compared on selected individuals of sessile oak in Brno, Czech Republic. According to the statistical analysis, there was a significant difference between values measured by the PiCUS® acoustic tomograph and those measured by both the ARBOTOM and ArborSonic® acoustic tomographs. Based on the measured data, velocities measured by PiCUS® were considerably lower than those recorded by the other acoustic tomographs (ARBOTOM® and ARBORSONIC®). Measured radial and tangential velocities differed from each other. In data obtained from the defective cross-sections, this difference was attenuated. Image reconstructions (tomograms) from the acoustic tomographs differed from each other. Complex shapes of defects in standing trees can significantly influence acoustic tomography results. According to the statistical analysis, there was no significant relationship between sound velocity and density, while there was a relatively strong positive correlation between sound velocity and moisture content.
Integrating Web Services/Applications to Improve Pediatric Functionalities in Electronic Health Records
Authors: Weinberg Stuart T. , Monsen Craig , Lehmann Christoph U. , Leu Michael G.
Published: June 2021

The past decade has seen a substantial increase in the use of electronic health records (EHRs) by health care providers caring for children. However, gaps in pediatric-specific functionalities continue to exist in some EHR systems, including population-specific growth curves, immunization clinical decision support, weight-based medication dosing with rounding, calculation of pediatric hypertension percentiles, age-specific developmental assessment, newborn bilirubin nomograms, anticipatory guidance reminders, and other functionalities described elsewhere. Implementing pediatric functionalities into EHRs is critical to the provision of safe pediatric care. As an alternative to direct implementation in EHRs, EHR vendor agnostic Web applications, Web services, and application programming interfaces offer an opportunity to provide pediatric functionalities and eliminate the need for each vendor to develop these functionalities. Successful implementation of Web services and related technologies requires responsible attention from both EHR vendors and developers of Web services, Web applications, and application programming interfaces to the use of data terminology standards, adherence to privacy and security requirements, rigorous testing, change management processes, and robust system support and maintenance. Education of health care providers about opportunities to improve pediatric functionalities in EHRs by using these services can facilitate discussions in EHR user groups in which vendors can be lobbied to implement them. This policy statement emphasizes the need to address pediatric-specific functionalities in EHRs by providing insight and recommendations into the development, maintenance, integration, and support of these novel solutions.
Athenian Ostrakismos and the Hybris of a Would-Be Tyrant
Authors: Kuokkanen Suvi
Published: June 2021

Analysing Greek literary sources together with a selection of preserved ostraka, this article discusses the interrelationships between the prevention of hybris, the perceptions of tyranny, and the purposes of practising ostracism in fifth-century Athens. It will be proposed that the political decisions to organize ostrakophoriai were reactions to the threat posed by hybristic disposition of an individual – hence, ostracism played a role in detecting and punishing one’s motives and intentions. It will also be proposed that luxurious life-style was perceived by the Athenians both as a sign of Medism and of a hybristic disposition characteristic of a would-be-tyrant. Thus, profligate life-styles of political figures might have urged the Athenians to organise ostrakophoriai.
The Structure of Nepos’ Book on Foreign Generals
Authors: Szabó Ferenc Krisztián
Published: June 2021

The paper aims at specifying Nepos’ principles of composition in the Liber de excellentibus ducibus exterarum gentium. After reviewing the hypotheses on the structure of the work it will be argued mainly on the basis of the editorial notes and cross-references written in the book that the generals are lined up according to their provenance and arranged in a kind of frame structure to express the translatio imperii. The author focuses attention on the Athenian commanders to demonstrate the organic nature of history: in the background of their vitae the biography of Athens itself is also depicted. With the help of these observations most of the uncertainties, including the striking chronological discrepancies, can be clarified.
“Minor” Aquileian Families Between Noricum and Pannonia
Authors: Gregoratti Leonardo
Published: June 2021

The paper deals with the presence of North-eastern Italic families in Northern Pannonia. Through a selection of the epigraphic texts based on the information provided by the texts and the chronology, it is possible to investigate the spreading of Italic traders’ families from Italy, Noricum and Emona to the cities on the north tract of the “Amber Route” and the Balaton Lake area.
Unintentional drowning deaths among children aged 0–17 years : United States, 1999–2019
Authors:   National Center for Health Statistics (U.S.), Spencer Merianne , Hedegaard Holly , Warner Margaret
Published: June 2021

This report presents national trends in unintentional drowning death rates for children aged 0–17 years for 1999–2019.
Phosphate treatments for stone conservation: 3-year field study in the Royal Palace of Versailles (France)
Authors: Sassoni Enrico , Delhomme Clément , Forst Sébastien , Graziani Gabriela , Hénin Jérémy , Masi Giulia , Palazzo Azzurra , Rolland Olivier , Vergès-Belmin Veronique
Published: June 2021

Phosphate treatments for conservation of stone have provided so far encouraging results in laboratory studies, as they exhibit good effectiveness, compatibility and durability to accelerated weathering tests. However, limited data are available about their long-term performance in real environment. Here, a systematic evaluation of phosphate consolidants after prolonged exposure in the field is reported for the first time. Naturally weathered marble specimens and a XVII century marble sculpture located in the Park of the Royal Palace in Versailles were treated by various formulations of the phosphate consolidant. Their conservation state was assessed before treatment by non-destructive methods (ultrasounds, color measurement, water absorption) and, in the case of the specimens, also by slightly destructive tests (SEM, FT-IR, MIP, IC). The conservation state of the specimens and the sculpture was further assessed right after treatment and then periodically monitored during exposure in the Versailles Park. Characterization after field exposure demonstrated that some formulations of the phosphate treatment are able to slow down marble deterioration, although it was not completely inhibited. Limited alterations in water absorption and aesthetic appearance confirmed the general compatibility of the phosphate treatment.
Market Basket Analysis of Basket Data with Demographics: A Case Study in E-Retailing
Authors: ÇİÇEKLİ Ural Gökay , KABASAKAL İnanç
Published: June 2021

Businesses overcome with a high degree of competition that necessitates customer-focused strategies in most industries. In a digitalized business environment, the implementation of such strategies often requires the analysis of customer data. Market basket analysis is a well-known method in marketing that examines basket data to discover useful information about customers’ purchase intentions. The analysis has been a playground for data mining researchers that aim to overcome with its practical challenges. Our study extends the conventional basket analysis by incorporating demographic variables along with purchase transactions. With such modification, we provide an example for the extraction of segment-specific rules that relate product-level purchase decisions with gender, location, and age group. For this purpose, we present a case study on monthly basket data obtained from an e-retailer in Turkey. Our findings demonstrate association rules that might guide marketing practitioners who need to discover segment-specific purchase patterns to designate personalized promotions.
GÖRSEL BİR İMAJ VE MEKÂN METAFORUNUN KAYNAĞI OLARAK BAHAR
Authors: KARADENİZ Mustafa Uğur
Published: June 2021

Yaygın kullanımında bir mevsime karşılık gelen bahar sözcüğü, klâsik Türk şiirinde çiçek, yaprak, yüz ve yanak anlamlarının yanı sıra put, tapınak ve kiliseyi de karşılamaktadır. Sözcüğün bu çok çeşitli kullanımlarında görsel bir tasviri ifade arayışı göze çarpmaktadır. Klâsik Türk şiirinde güzellik unsurlarının bir mekân estetiğinin yansımalarından doğduğu söylenebilir. Baharın lügatlerdeki karşılığına ve örnek metinlerde kullanımına bakıldığında, sözcüğün aslında mekânı ifade eden bir kavramken zamanla o mekânın niteliklerine benzer özellikler gösteren başka bir anlamsal forma dönüştüğü görülecektir. Hristiyanlara ait mabetlerde de tapınaklarda olduğu gibi resim ve putların bulunması, kilisenin klâsik Türk edebiyatında bahar sözcüğüyle karşılanmasına neden olmuştur, denebilir. Şiirlerde görsel bir imaj öne çıkarılmak istendiğinde kilisenin (deyr), sahip olduğu resim ve süslemeler sebebiyle bir istiare olarak dış mekânın ifadesinde kullanıldığı görülmektedir.
Can scientists and knowledge keepers sit comfortably together? An Indigenous physician’s reflections on a decade of participatory research into First Nations nutrition, environment and health
Authors: Adams Evan
Published: June 2021

The author, an Indigenous physician, offers his reflections on the history of scientific research with Indigenous People and its past role in ethical breaches and excesses of colonialism, as a backdrop to the relatively recent advances in collaborative, community-based participatory research involving First Nations and Inuit in Canada. The First Nations Food, Nutrition and Environment Study (2008–2018), introduced in this Special Issue, is presented as an example of an ethical space that was sustained for a decade to collaboratively develop new knowledge by First Nations and scientists working together, respectfully and inspired by shared interest. A short overview of twelve articles of the Special Issue is provided and characterized as creating a previously inaccessible picture of the modern diets of First Nations, along with the suite of environmental factors that are present in food and water in and around communities. Ultimately, the author hopes that Canadian society can set the table with Indigenous Peoples and respectfully set opinions onto each other and do this over and over again. With Canada already being a multicultural and pluralistic society, adding Indigenous realities into the mix only respects and honours the Indigenous roots of this country.
Development of Software for a Control System
for Complex Production Processes
Authors: Matveikin V. G. , Dmitrievsky B. S. , Terekhova A. A. , Al Knfer S. N. A. , Al Amidi M. A. D.
Published: June 2021

An algorithm for managing the schedule of complex production processes has been developed. The mathematical formulation of the problem is presented. The processes associated with the operation of the software complex of the control system are analyzed in detail: maintaining an information base, calculating
a production schedule, scheduling production, changing a schedule and drawing
up reporting documentation. The block diagram of the control algorithm is presented. The control system takes into account the complexity of production processes, generates an optimal equipment operation schedule that meets the restrictions on equipment loading. The description of the input and output information of the control system
is presented. The developed control system adapts to changing conditions and fully fulfills production tasks.
A Computer-Aided Design System for Virtual Models for Training in Control of the Synthesis Process of Carbon Nanostructures
Authors: Petrov D. N. , Chistyakova T. B.
Published: June 2021

A conceptual description of a complex, potentially dangerous process of electric arc synthesis of carbon nanocluster structures is presented. The architecture and basic functional elements of a modular computer system for designing virtual models of a production facility for training operators to control the synthesis of carbon nanocluster structures are presented. A complex task of training to control a chemical-technological process is formulated, which is executed on the basis of the obtained software solution. The stages of the multistage process of designing a virtual model and setting up a computer system for the logistics base of an industrial enterprise are presented as part of testing the reactor island model, Kretschmer’s electric arc, industrial and expert data on the synthesis of fullerene С60.
The Structure of the Filtration Curve and Methods of Its Approximation. Part 2. The Upper Limit of the Application of Darcy’s Law
Authors: Merentsov N. A. , Balashov V. A. , Golovanchikov A. B. , Topilin M. V. , Persidskiy A. V.
Published: June 2021

The paper describes the filtration curve up to the filtration rate
at which the nonlinear filtration appears due to the inertial component of the filtration flow structure, that is, the critical value of the filtration rate υcr, which determines
the upper limit of the possible application of Darcy’s law.
Designing a Chemical Nickel Plating Unit Operating
as Part of a Galvanic Line
Authors: Borisenko A. B. , Khramtsov V. V. , Nemtinov V. A. , Krylov A. V. , Matrokhin M. A.
Published: June 2021

The paper presents the results of the analysis of the requirements for process equipment for chemical nickel plating of metal products, including carbon steels, titanium, aluminum and their alloys. The disadvantages of standard equipment (UKhN series installations, functioning as a separate process unit) during its operation as part of a galvanic line are listed. The results of the design development of
an improved installation for chemical nickel plating of metal products with repeated use of the solution are presented. The testing of the installation under the conditions
of a galvanic section of a real mechanical production has shown its high efficiency.
Multifractional Separation of Polydisperse Particles Varying in Shape and Density
Authors: Kudi A. N. , Fedosov N. A. , Sergeev V. V. , Tarakanov A. G. , Pronin V. A. , Goncharova A. E.
Published: June 2021

A description of the functional capabilities of the technology of multifraction separation of particles by density and shape in a polydisperse bulk material is given. The technology assumes a consistent and complex use of the effects of quasi-diffusion separation and segregation of particles in a fast shear flow on a gravity slope, as well as the use of traditional technological methods of particle shape calibration. The assessment of the effectiveness of using of multifraction technology for the production of biologically valuable seed material is given.
Production and quality evaluation of soy cheese (tofu) using various coagulants
Authors: Ndife Joel , Imade Itohan , Samaila James
Published: June 2021

Food formulations that incorporate soy ingredients are being exploited as veritable alternatives. Cheese analogues are healthy alternatives to obtain the benefits of consuming functional foods. There is a need to enhance the production and quality of soy cheese. In this study, soy cheese (tofu) samples were prepared from soybean using four selected coagulants - Moringa oleifera seed extract (MC), tamarind seed extract (TC), lime juice (LC) and alum (AC). The effects of the coagulants on the physicochemical, microbial and sensory qualities of the soy cheese samples were evaluated. The results of the physical properties of the samples showed that MC had higher yield (12.84%) and acidity (0.37%), while AC had the highest values in hardness (84.55%) and dry matter (36.72%) content. The result of the proximate composition revealed that MC had the lowest moisture content (60.52 %) and the highest protein content (22.51%). The ash content of the soy cheese samples from plant coagulants MC (3.00%), TC (2.80%) and LC (3.5%) were lower than that of the alum coagulant AC (3.89%). The cheese from alum coagulant (AC) had more minerals than those from plant coagulants. TC had the highest vitamin C (2.69 mg/100 g), while MC had the highest vitamin B1 (6.07 mg/100 g) and B2 (29.21 mg/100 g) contents. There was no detection of coliform in the soy cheese samples. There were no significant differences (p>0.05) in the appearance and overall acceptability of MC sample and LC sample MC sample from Moringa oleifera seed extract coagulant had the highest sensory scores for flavour (8.35), texture (8.40) and overall acceptability (8.63). The results of quality properties of the cheese samples differed with the coagulants used. Moringa Oleifera coagulated cheese (MC) had superiority in nutrients and sensory qualities Hence, it is recommended for tofu production.
Gender roles and dynamics in COVID-19 times: Changes and continuities in sharing arrangements of housework and caregiving
Authors: Santos Maria Helena , Rosa Miriam , Correia Rita B. , Xavier Eduardo
Published: June 2021

This paper intends to understand the effects of the COVID-19 pandemic on shared unpaid work between men and women living as a couple during the confinement, to assess whether this situation influenced family dynamics, especially when professional status changed to teleworking. With this goal, weekly hours spent in housework and caregiving, perceptions of justice about sharing arrangements, and the impact of COVID in the housework and caregiving workload were analyzed, in a sample of 128 working-age participants, living as a couple, and mostly in telework (58%). The asymmetries identified in recent literature were also found in our study, particularly for couples with underage children. Women reported doing much more work than it would be fair, both in household and caregiving tasks. Parents reported a workload increase in caregiving tasks, compared to participants without children, independently of sex.
GAMIFICATION STRATEGY OF ACTIVE LEARNING IN MENTORING AMONG MILINEAL STUDENTS
Authors: Tengku Wook Tengku Siti Meriam , Zairon Intan Yusrina , Rahmat Masura , Dahlan Hadi Affendy , Mohd Salleh Syahanim
Published: June 2021

Active learning allows students to control their learning style by relating it to their actual experiences. This learning model can increase student motivation and engagement in an interactive environment. However, mentoring has not been actively implemented even though mentoring is one of the important agendas for the next 20 years and in line with education 4.0, which encourages students towards active learning. The study's findings found that the gamification approach is an effective method to increase the level of involvement and motivation of students in active learning. However, gamification becomes less effective when in-depth learning is carried out, and the learning process cannot provide satisfaction to students with high levels of confidence. This group only participates for fun but does not want to socialize with other students because the core of gamification is competitive-oriented. Therefore, the objective of this study is to produce a mentoring-style gamification strategy that has collaborative and social mechanics in a soft skill learning environment to increase the participation level of less sociable students. The hypothesis of this study is to introduce learning as a more motivating experience for all levels, not just outstanding students. Student involvement in the play experience can be translated into an educational context to facilitate learning while influencing personality and behavior, including communication skills, problem-solving, self-motivation, decision-making, and time management. The methodology of this study is through exploratory research, namely, observation, activity development, and effectiveness testing to relate students' experiences in authentic learning situations. The result from this study is a mentoring-style gamification strategy that is a guide for mentors to carry out active learning mentoring activities that involve soft skills with students.
Heroínas de una Sociedad Misógina. Hildergard von Bingen y la Revelación de lo Oculto. Visionarias en el Arte Contemporáneo.
Authors: Navalón Blesa Natividad , Mañas García Alejandro , Cháfer Bixquert Teresa
Published: June 2021

This is the second article of a whole series of reflections in which our main objective is to recover the space that the women should never have lost. In them we review those heroines, combatants in a misogynistic society, who have been influential thinkers in the creative work developed by contemporary women artists. This article is centered on the figure of Hildegard von Bingen, a versatile and visionary nun, who left her legacy in different disciplines such as writing, painting, music, science, among others. A heroine, in which many artists have set their sights as a benchmark for empowerment and have directed their artistic work towards mysticism, generating a connection between art and spirituality. We collect a selection of artists who have used mysticism, silence and visions in their creative process to give voice to a gender problem in this society and to work in the fight for the recovery of a space that should always have belonged to the woman. Artists who, through their work, claim a place in a phallocentric society. Hildegard is a clear example of what we call female heroines in a misogynistic society.
Why Some Adolescents Engage in Risk-Taking Behavior
Authors: Ajisuksmo Clara R.P.
Published: June 2021

This study explored adolescents’ reasons for involving themselves, or not, in risk-taking behavior, in two vulnerable areas of North Jakarta. The sample was purposively selected among households with adolescents ranging from 12 to 18 years old living in the two areas. The study involved 401 parents (8% female; 92% male; mean age 45.3 years) and 414 adolescents (57.49% female; 42.51% male; mean age 14.9 years). Parents’ demographic data included educational level, employment status, family income, and expenditure. Adolescents were asked about their perceptions of their relationships with their parents, whether they had been involved in eight risky behaviors (smoking, consuming alcohol, substance use, brawling, crime, physical fighting, heavy petting, and premarital sex), and reasons for engaging in risky behaviors or not. The comparison of proportions of eight risky behavior was tested by different test procedures, namely Z test, Chi-Square and Marascuillo multiple comparison. Results revealed that older adolescents were more likely to be involved in risk-taking, and boys were more likely to engage in risky behaviors than girls. The study also indicated that curiosity and peer pressure were the main reasons adolescents engaged in risky behaviors. Advice from family members, fear of God, and fear of being sinful were reasons adolescents did not engage in risky behaviors.
Representation of Javanese Masculinity in The Dangdut Songs Lyric
Authors: Ulya Chafit , Sari Ria Dwi Puspita , Saddhono Kundharu , Sudaryanto Memet
Published: June 2021

Modernization provides a major change in the structure of human life, including in relations between men and women in the marriage life. This change creates a new dimensions of masculinity, including those found in the lyrics of dangdut koplo songs. This research was conducted to answer the question, what is the form of the new dimension that represents Javanese masculinity in the lyrics of dangdut koplo songs? This research uses descriptive qualitative method by using Jonet Saltzman Chafetz's concept of masculinity. Chafetz divides masculinity into six areas, namely physical, functional, sexual, emotional, intellectual, and impersonal. The research gives conclusion that the Javanese dangdut songs raise three dimensions of masculinity, namely functional, emotional, and intellectual. The functional dimension places men in the role of breadwinners. The emotional dimension places men in a person with high emotional stability and maturity. Meanwhile, the intellectual dimension presents a male figure with logical, rational, and realistic thoughts.
University Students' Perceptions of Curriculum Content Delivery During COVID-19 New Normal in South Africa
Authors: Omodan Bunmi Isaiah , Ige Olugbenga A
Published: June 2021

Observation and experience exist among university students during COVID-19 new normal; the quality and the process of academic activities have been compromised. This study, therefore, examines the lacuna on whether the new normal is more productive by ensuring that the intention of the curriculum towards students' content knowledge is met or not. Organisational change theory was used to theorise the study within the transformative paradigm (TP) and participatory Rresearch (PR) lenses as a research design. The study was conducted in one of the universities in South Africa. Ten students were selected using the convenience sampling technique because the students were not fully on campus as of the time of this study. The online interview was adopted to collect data because of social distancing rules across the country. Thematic analysis was used to interpret the data. The findings revealed that the COVID-19 new normal does not affect students’ academic performance negatively even though the quality of content delivery is low. The channels of teaching-learning and the Internet of Things are deduced to be unpleasant for the students with recommendations that there is a need to provide the internet-or-things alongside training and retraining for students and lecturers.
Mathematics Teacher Education in Turkey through the Lens of International TEDS-M Study
Authors: Ertaş Güneş , Aslan-Tutak Fatma
Published: June 2021

This paper is a part of a broader study which aims to investigate mathematics teacher candidates' mathematical knowledge for teaching (MKT) by using the Turkish translated versions of TEDS-M (Teacher Education and Development Study in Mathematics) Primary and Secondary Released Items. The sample of the study comprised freshman (first year) and senior (fourth and fifth year) students from primary and secondary mathematics teacher education programs. Firstly, this study aimed to examine differences in MKT of teacher candidates at the beginning and at the end of their undergraduate education. For both departments, senior students had statistically significant higher scores than freshman students. Secondly, this study also aimed to examine participating Turkish preservice mathematics teachers’ mathematical knowledge for teaching by using international results of TEDS-M Study. Participating senior preservice teachers’ correct response percentages were higher than international average in all domains except “data” in primary level, and “data”, “mathematical modelling” and “symmetry” in secondary level. The common content domains where primary and secondary preservice teachers’ percentages were lower than international average is “data”. In this paper, these areas will be examined within the context of Turkish education.
Investigation of pre-service elementary mathematics teachers’ understanding on solids
Authors: Karakus Fatih , Erşen Zeynep Bahar
Published: June 2021

The aim of the present study is to determine the elementary pre-service mathematics teachers’ understanding on solids. For this purpose, pre-service teachers’ definitions and drawings of these objects were examined. Qualitative research method was used. A written questionnaire consisting of sixteen open-ended and multiple-choice questions was conducted with 127 elementary pre-service mathematics teachers chosen by convenience sample which is one of non-random sampling method. The collected qualitative data were analyzed by both descriptive and content analysis.  The results revealed that pre-service teachers made insufficient connections among cylinder, prism, cone and pyramid. So, it can be said that their understanding about solids was weak and procedural.
Capital digital en educación superior: Fortalezas y carencias digitales para enfrentar la educación a distancia.
Authors: Matamala Carolina
Published: June 2021

El siguiente artículo tiene como objetivo diseñar y medir el concepto de capital digital, de tal forma de contar con una herramienta metodológica útil para evaluar las brechas digitales al interior del campo educativo, lo que contribuirá a comprender las fortalezas y carencias digitales que enfrentan los estudiantes de educación superior durante la enseñanza virtual. Para llevar a cabo la investigación se encuestó a 1.399 estudiantes de educación superior, de los cuales un 61% son estudiantes de universidades y un 39% de centros de formación técnica-profesional. Los resultados evidencian una serie de desigualdades económicas, culturales y digitales entre ambos grupos de estudiantes. En lo referido al capital digital, se puede establecer que los estudiantes enfrentan una serie de deficiencias referidas a la producción de información y en menor medida al proceso de búsqueda de información, que podría dificultar su proceso de aprendizaje durante la educación telemática, con lo cual docentes e instituciones de educación superior, necesitan implementar acciones remediales que permitan disminuir los efectos adversos de las brechas digitales.
A Synchronization Acquisition Method for the Dual-Sequence-Frequency-Hopping Communication System Based on Software Defined Radio at Low SNR
Authors:   Department of Electronics and Optical Engineering, Army Engineering University, Shijiazhuang 050003,China., Zhang Xiaolu , Quan Houde , Sun Huixian , Cui Peizhang , Liu Guangkai
Published: June 2021

The Dual-Sequence-Frequency-Hopping (DSFH) communication system based on software defined radio (SDR) system belongs to the field of information and communication security of software engineering. At very low signal-to-noise ratio (SNR), which is lower than -10dB, the DSFH fails to synchronize. Synchronization acquisition method via a combined multi-signal detection (SAMCMD) is proposed. The feature of a short sequence of frequency hopping (FH) frequency point is utilized to express the information of the time of date (TOD), and the time accumulation of several FH signals is used to extend the detection time. This method can not only be appropriate for DSFH but also greatly improve the synchronization performance at low SNR. Explain the principle and structure of the SAMCMD. And obtain the performance of this method of the SDR synchronization acquisition. The conclusions are as below: 1) the longer detection time is, the better the anti-jamming performance of SAMCMD is; 2) SAMCMD can gain about 22.5dB-24dB when the SNR is -20dB and the acquisition probability requirement is 96.31% due to the extension of the detection time, compared with the traditional FH synchronization acquisition method.
Effectiveness of low-dose pentoxithylline combined with tocopherol acetate in intrathoracic sacroidosis
Authors: Vizel A. A. , Vizel E. A. , Nasretdinova G. R. , Islamova L. V. , Kataev O. G. , Mingaleev F. A.
Published: June 2021

We conducted a simple prospective trial studied influence of pentoxifylline on the course of active pulmonary sarcoidosis in 70 patients. This drug decreasing TNF-α (tissue necrosis factor-α) level was given orally in the dose of 600 mg 3 times a day in combination with α-to copherol in the dose of 400 IU twice a day. Fourteen patients stopped treatment because of side effects (nausea, dizziness). Fifty-six patients had clinical improvement in 71.4 % of cases, reduction of intrathoracic lymphadenopathy in 71.8 %, reliable improvement in DLCO (lung diffusing capacity for carbon monoxide) and increase in the blood lymphocyte count. The clinical effectiveness of this drug combination was less in chronic sarcoidosis and in patients who had taken systemic glucocorticosteroids or antituberculotics before. A multicentral comparative trial is required to include pentoxifylline to guidelines on management sarcoidosis patients.