bluuebunny/crossref_metadata_2025 huggingface dataset:
Hierarchical Power Scheduling Algorithm and Energy Management System in a Smart Solar Micro Grid
Authors: Alagbu Ekene
Published: October 2021

Abstract: In recent years, as the development of the modern technologies in information, communication, control and computing, our living environment is becoming ”smart.” Smart Home and Smart City have gradually become part of our lives, and are no longer merely future concepts for the public. Microgrids have been set up to try and bring electricity to people even living in remote and rural areas. Even though different techniques have been applied to solve this problem, nevertheless there seems to be scarcity in deep exploration of local and indigenous solar power generation and weather data unique to the African context while dealing with this issue. In this dissertation, an optimal configuration algorithm for sharing energy resources in a microgrid using data collected from a microgrid located in Nigeria has been developed. The microgrid was divided into three (3) blocks (containing different offices) with different load distribution. The system was analyzed to determine the degree of deviation of the supplied power from the load demand. Results showed that in one of the blocks, the developed system showed a 89.2% improvement in the amount of surplus energy generated by the system. Simulation results also showed that the conventional system suffered the worst draw down during peak load demands. The battery SoC in block A went below the acceptable 30% threshold, while at that instance the SoC for the developed system in this work was about 57%. The developed worked showed about 27% improvement on the existing system even at peak load periods. Simulation results showed that as at 100 seconds, the error percentage of the existing design spiked to 7% while that of the developed algorithm was tending to zero. The system response when switching between different scenarios was also examined, and it was discovered that the developed algorithm responded to the switch in just 80mS. Keywords: Microgrid, Solar PV, ELDI, Scheduling algorithm, Energy Management
Virtual Disks Performance Analysis Using Flexible I/O and Powerstat
Authors: Patange Pritam
Published: October 2021

Abstract: Cloud computing has experienced significant growth in the recent years owing to the various advantages it provides such as 24/7 availability, quick provisioning of resources, easy scalability to name a few. Virtualization is the backbone of cloud computing. Virtual Machines (VMs) are created and executed by a software called Virtual Machine Monitor (VMM) or the hypervisor. It separates compute environments from the actual physical infrastructure. A disk image file representing a single virtual machine is created on the hypervisor’s file system. In this paper, we analysed the runtime performance of multiple different disk image file formats. The analysis comprises of four different parameters of performance namely- bandwidth, latency, input-output operations performed per second (IOPS) and power consumption. The impact of the hypervisor’s block and file sizes is also analysed for the different file formats. The paper aims to act as a reference for the reader in choosing the most appropriate disk file image format for their use case based on the performance comparisons made between different disk image file formats on two different hypervisors – KVM and VirtualBox. Keywords: Virtualization, Virtual disk formats, Cloud computing, fio, KVM, virt-manager, powerstat, VirtualBox.
Design of Reconfigurable Antenna for 5G Applications
Authors: Mukesh Devika
Published: October 2021

Abstract: With rapid evolution of wireless communication and mobile networking techniques, one of the major advancements is that fifth generation (5G) is envisioned in-order to meet the perpetual demand for greater network speed and capacity. This paper provides an overview of the design of five reconfigurable antennas for 5G wireless application is introduced by varying the substrate material used. Teflon, Taconic TLY, Rogers Ultralam 1217, Rogers RT/Duroid 5880, FR4 are the substrate materials used in designing the respective antennas. The proposed antenna designs employ a leaky-wave antenna based on half-mode substrate integrated waveguide. Since this antenna is used in 5G communication systems, the centre frequency is taken as 28.5 GHz. The length width and height of each of the antennas are designed using design procedures of rectangular patch antenna for all five substrates respectively. Each antennas are compared based on their return loss, VSWR, gain, directivity and radiation pattern respectively and an inference regarding performance of each substrate is obtained. On comparing the results of all the five antennas in the ON and OFF condition of switch, the results are found to be best in case of Rogers RT/duroid 5880 with return loss of -15.2719dB, VSWR of 1.4165, gain of 4.6dB, directivity of 4.31dB in the ON condition and with a return loss of - 13.0779dB, VSWR of 1.6893, gain of 3.4dB and directivity of 3.7dB in the OFF condition. Further by changing the switches and replaced it by conducting sheet switches for reduction of loss and were able to achieve improved results with return loss of24.5026dB, gain of 5.1dB in the ON condition and return loss of -12.6608dB and gain of 3.8dB in the OFF condition which contributed to the novelty of the project. In the proposed antennas, beam steering is obtained due to the disturbances in surface current under the influence of changing voltage bias of the switches. The technologies used make the antenna design compact provides configurability, which makes this antenna a suitable candidate for 5G applications. Keywords: 5G, reconfigurable antenna, leaky wave antenna, half mode substrate integrated waveguide, millimeter wave, beam steering
Analysis of Secondary Metabolites from Infloroscense Extract of Achyranthus Aspera
Authors: Samdariya Keerti
Published: October 2021

Abstract: The qualitative study of extract of AchyranthesAspera influoroscence shows the presence of different secondary metabolites. The study of active component of influoroscence of Achyranthesaspera was extracted . Plant extract contains several secondary metabolites .The extract was used for different phytochemical test. Test was performed using extract prepared by soxhlet extraction method. This plant have anti oxidative agent ,free radicals , phytoconstituents , and carcinogen detoxification and antioxidant defence system. Keywords: secondary metabolites, phytochemical test, antiallergic activity, antiperoxidative agent ,detoxification etc.
Russian Historiosophy of the ХXth Century in the Context of the Tradition of the Moral and Psychological Novel by F. Dostoevsky
Authors: Petrukhina Natalia M.
Published: October 2021

The article is devoted to the study of the specifics of the receptive influence of the moral and psychological novel by F. Dostoevskys on the development of the Russian historiosophical novel of the XXth century. The relevance of the problem is in the identification of an ideological dominant connected with the key problems associated with the moral attitudes of Dostoevsky's novelistics. The novelty of this study lies in considering, taking into account new ideological assessments of the role and status of a historical person, a historical novel about the narodovoltsy of the 50-60s of the ХХth century. The novels about the narodovoltsy of the 50-60s of ХХth century were chosen as an object of research to reflect the ideological concept of F. Dostoevsky in the receptive field of the searches of the XXth century writers and as a determinant of the moral coordinates of modern phenomena of reality. It is proved that the development of the moral and psychological historical novel in the 60-70s takes place under the strongest influence of the tradition of F. Dostoevsky. The receptive correlation of the genre coordinate system, subjective organization, historiosophical ideologism of the XXth century with the traditions of the moral and psychological historiosophy of Dostoevskys contextual field, on the one hand, forms a new Tynyanov-Forsh tradition, and on the other, develops the traditions of the writer's polyphonic ideological novel on a new level and determines the expansion of the moral polyphonism of the historical novel in its value and psychoanalytic orientation, when the principle of internal ethics begins to dominate the ideological and political fields.
The Reasons for the “Non-meeting” of F.M. Dostoevsky and Leo Tolstoy
Authors: Basinsky Pavel V.
Published: October 2021

The well-known historical and literary paradox is considered again: the contemporaries F.M. Dostoevsky and L.N. Tolstoy were not personally acquainted, although they had the opportunity to do so more than once. The assumption is substantiated that the main reason for such a non-meeting was not only a combination of random circumstances, but also the incredible intuition of both writers: constantly reading each other, feeling the deepest spiritual closeness and understanding the mutual significance for literature and society, both avoided everyday meetings even on literary occasions, because they were afraid that a possible verbal discussion would lead to an involuntary, even temporary profanation of their views.
Married Dostoevsky? The History of Relations between V.V. Rozanov and A.P. Suslova
Authors: Varlamov Alexey Nicolaeyvich
Published: October 2021

The article examines in detail the history of the relationship between A.P. Suslova and V.V. Rozanov in connection with the notion existing in the historical and literary science that Rozanovs marriage to Suslova was based on his deep interest in the work of F.M. Dostoevsky and his desire in such an unusual way to penetrate deeper into the secrets of the life and work of the author of The Idiot and The Brothers Karamazov. However, an appeal to various documentary evidence shows that Rozanovs marriage motives came from the warehouse of his nature and constituted a complex of rather complex reasons, among which the human, and not literary, research principle still dominates. The desire for a benevolently objective study of the life history of A.P. Suslova makes it possible to clarify at the modern scientific level the important facts of the biography of F.M. Dostoevsky and V.V. Rozanov, to free them from the stratifications of legends and myths.
The Transformation of the Idea of Internet Freedom in the XXIst Century
Authors: Zassoursky Ivan I. , Trishchenko Nataliia D.
Published: October 2021

The article analyzes the theoretical approaches that have developed in relation to the issues of control and freedom of the Internet space, including copyright regulation and its gradual transformation as the digital environment develops and changes. Special attention is given to the values underpinning the principles of regulation are determined. If initially the dominant notion was that the Internet would ensure humanity a new free world, then later the discourse shifted to much less optimistic views and topics the issue of network regulation, technical and legal restrictions, censorship and data protection. Most recent academic literature is devoted to the practical side of the issue, and the issue of values has faded into the background. As a result, the discussion has lost significant context: issues of freedom and human rights in the Internet environment, discussion of what is really important for society - security or the absence of restrictions, the problem of users trust in the state and platforms.
Bibliographic Information in the Theatre Magazine Artist
Authors: Zhilina Anastasia V.
Published: October 2021

The theatre magazine Artist has repeatedly become an object of scientific research. However, despite the wealth of works with a focus on structure of the magazine, the bibliographic section of Artist remains insufficiently studied. The bibliographic information of the journal has not yet become an object of subject-specific research. The empirical basis of the study is a complete set of publications of the theater magazine Artist for the entire period of its existence. Primary attention is paid to the bibliographic section of the journal and the appendix. Research methods are theoretical and historical analysis, generalization and systematization of the results obtained. In the proposed article, the author describes and comprehends the main forms of latent bibliographic information in the theatrical magazine Artist, first of all, the independent section Bibliography. The study defines main thematic areas of the section, its structure and main genres. The author also analyzes the types of bibliographic advertising in the journal: alphabetical directories of plays allowed to be performed, index of plays suitable for amateur shows, announcements on subscription from magazine editors, advertising of new books, ads for subscriptions to other print media. The author comes to the conclusion that along with educational intentions, the magazine staff solved specific selling tasks (sale of the magazine and books distributed through the publishers office). The latent bibliographic information of Artist can be useful for specialists interested in history of literature, journalism and theatre.
Gaming Slang Terms in Russian Online Media: A Case Study of News Articles
Authors: Volkova Irina I. , Chernyavskaya Alina G.
Published: October 2021

The goal of this study is to identify gaming slang terms in the news articles of highly rated Russian media. Three online newspapers of various types were used as an empirical material: Kommersant (the first private business newspaper in Russia), RBC (a socio-political analytical newspaper) and Rossiyskaya Gazeta (agency of the Russian Federation government). With help of the content analysis of the media texts, all cases of using the slang gaming terms such as achievement, noob, easter eggs etc. have been discovered and described. The results of the study show that over the past five years the popularity of the gaming terms usage in the media has been growing; this increase can be described as a linear progressive growth: gaming slang is becoming an integral part of the Runet online resources and is gradually entering common vocabulary. It can be assumed that with the increase in the number of media managers from the generation of digital natives and their transition to the category of decision makers, the growth of gaming slang terms in online media will become exponential.
Deslocamentos de visibilidades hegemônicas e diálogos entre representações da cozinha no reality show Cook Off – Duelo de Sabores
Authors: Scabin Nara Lya Cabral
Published: October 2021

O artigo busca compreender as maneiras pelas quais diálogos com/entre regimes representacionais da cozinha inscrevem-se no reality show Cook Off – Duelo de Sabores, exibido em 2015 pela emissora televisiva portuguesa RTP1. Ao mesmo tempo, evidencia como a produção mobiliza e, sobretudo, tensiona visibilidades hegemônicas do gênero reality show. Nesse percurso, identificam-se tensionamentos relativos tanto aos enquadramentos da temática da competição quanto às representações do que denominamos uma “cozinha como culinária”. Quanto ao segundo ponto, não obstante o olhar gastronomizado dos chefs assuma uma posição hierarquicamente destacada, o programa dá a ver imagens que evidenciam o (re)conhecimento de uma cozinha cotidiana e popular, nas quais se entreveem “artes de fazer” do dia a dia.
(Entre)laçamentos: a imagem e o (entre)lugar da/na Educação Estética
Authors: Sell Duarte Pillotto Silvia
Published: October 2021

O objetivo desse artigo é compreender o (entre)lugar, o qual tem seu ponto de intersecção na imagem/obra e na educação estética. Temos vivido há algum tempo sob o signo do hibridismo na imagem e na educação estética, o que implica passagem atemporal e um caos nas materialidades. Ou seja, um processo contínuo de (re)interpretação e mesmo de (re)invenção da existência humana na tentativa de nos mantermos vivos em nossos pensares e sentires. Com abordagem bibliográfica/narrativa a pretensão é apresentar a imagem e a educação estética (entre)laçadas nas fronteiras da não verdade e no subterrâneo dos deslocamentos, das incertezas e das subjetividades, que caminham no obscuro campo da estética. A imagem esconde-se e (re)aparece em múltiplos sentidos redesenhando nossa compreensão e não-compreensão. Nesse território (des)conhecido se atravessam as relações éticas, estéticas e educacionais, (re)significadas nos processos de sensibilidades de si, do outro e do imprevisível mundo em que habitamos.
A imagem é clara? O VAR e as interpretações da imagem na Copa do Mundo da Rússia 2018
Authors: Gaspar Teixeira Carlos Roberto , Tietzmann Roberto
Published: October 2021

Esse artigo analisa as transmissões de dois lances polêmicos com árbitro de vídeo em dois jogos da seleção brasileira durante a Copa do Mundo FIFA 2018 na Rússia, em que uma única geração oficial dos vídeos das partidas motivou interpretações divergentes de comentaristas na televisão aberta e por assinatura. Questionamos o motivo das discordâncias continuadas apesar do aprimoramento de tecnologia e regulamento. Fundamentado em pensadores de teorias da imagem, como Badiou (2017), Bergson (2006), Didi-Huberman (1998) e Debray (1993), os autores puderam concluir que toda a imagem é dotada de um carácter interpretativo e subjetivo, o que raramente a permite ser indiscutível, em se tratando de esporte, mais especificamente no futebol.
Fotojornalismo e representações da educação: as narrativas sobre o contexto de precariedade no ensino remoto brasileiro
Authors: Pernisa Júnior Carlos , Figueira Leal Paulo Roberto , Ferreira Campos Monique
Published: October 2021

O presente artigo dedica-se a analisar as fotografias que circularam nos ambientes digitais dos jornais O Globo e Folha de S.Paulo no ano de 2020 direcionadas para o tema da educação. Buscamos compreender como os veículos abordaram as condições de precariedade dos sujeitos educandos na construção das narrativas visuais sobre a falta de acesso à educação no período da pandemia. Trata-se de um estudo voltado para os elementos compositivos mobilizados nas fotografias de notícias sobre o ensino remoto no Brasil, nas significações da identidade e da diferença, utilizando-se da metodologia de análise de conteúdo. Para tanto, buscamos fundamentar a análise nas teorias construcionistas do jornalismo, culturalistas, da Fotografia-expressão e também nos estudos sobre a sociedade midiatizada.
A persistência do misticismo, do senso comum e do mal nas receitas milagrosas contra a Covid-19: uma proposta de interpretação
Authors: Da Silva Granez Marcio
Published: October 2021

O artigo consiste numa reflexão sobre o caráter recorrente da desinformação no contexto da pandemia da Covid-19. Parte de revisão de conceitos de desinformação (UNESCO, 2019; SHAO, 2020; POSETTI; BONCHEVA, 2020), aborda a articulação entre religião, senso comum e o mal na interpretação da realidade, mostrando como eles podem servir à desinformação (FREUD, 2006; ELIADE, 2001, HARARI, 2016, PONDÉ, 2018), e analisa forma e conteúdo de cinco mensagens sobre receitas milagrosas, checadas pelo site Nujoc Checagem. Por fim, propõe quatro chaves de leitura para interpretar os dados: a. A chancela da divindade; b. A persistência da tradição; c. A natureza invisível do mal; d. O caráter cíclico da desinformação.
Enquadramentos e desinformação sobre vacina contra COVID-19 no Youtube: embaralhamentos entre ciência e negacionismo
Authors: Brotas Antonio , Rocha Costa Marcia Cristina , Massarani Luisa
Published: October 2021

Este estudo analisa os enquadramentos (framing) e sua relação com a desinformação sobre vacinas contra a COVID-19 em 50 vídeos postados no YouTube em 2020, em canais de influenciadores brasileiros, selecionados a partir do engajamento, considerando visualizações, comentários e likes. Como caminho teórico-metodológico, adota-se a ideia de quadros (frames) como “pacotes interpretativos” que produzem sentidos e têm ressonância na cultura. Os resultados apontam que os quadros “risco e incerteza científica” e “política pública e estratégia política”, apesar de subordinados ao frame dominante “novo desenvolvimento tecnológico”, foram os mais associados à ocorrência da desordem informacional em narrativas de médicos, religiosos, youtubers e profissionais da comunicação. A desinformação presente nos discursos antivacina também ocorre em narrativas que defendem a ciência e a vacina, evidenciando as tensões e/ou ambiguidades que podem ocorrer no enquadramento midiático. O frame “novo desenvolvimento tecnológico” foi predominante na amostra e no enfrentamento à desinformação, destacando-se narrativas de pesquisadores e divulgadores da ciência, que demonstram a importância da divulgação científica.
Fernando Buen Abad Domínguez: epistemologia de combate e semiótica crítica
Authors: Schneider Marco André Feldman , Bonetti Marco Antônio
Published: October 2021

O filósofo mexicano Fernando Buen Abad Domínguez é professor e diretor do Instituto de Cultura e Comunicação da Universidade Nacional de Lanús (Buenos Aires, Argentina). Nesta entrevista, realizada em setembro de 2021 por e-mail, Buen Abad Domínguez discorre sobre sua teoria da semiótica crítica, forjada na batalha epistemológica e ideológica mais ampla contra a dominação simbólica que trava dentro e fora da academia. Integrante de diversas associações internacionais, como a Rede de Intelectuais e Artistas Independentes em Defesa da Humanidade, fundada por Fidel Castro, Buen Abad entende que o problema da desinformação está relacionado à perpetuação da dominação de classe, cujo enfrentamento requer a democratização substantiva da comunicação.  Mantivemos as respostas de Buen Abad Dominguez em seu idioma original para preservar a força e a potência de sua verve.
Pola Unmet Need Kontrasepsi Modern di Indonesia: Analisis Lanjutan Data SDKI 2007, 2012 dan 2017
Authors: Amraeni Yunita , Kamso Sudijanto , Sabarinah Sabarinah , Purwantyastuti Purwantyastuti
Published: October 2021

Unmet need KB berdasarkan data SDKI di Indonesia masih stagnan. Sementara konsep unmet need sesuai dengan program pemerintah yaitu unmet need alat kontrasepsi modern masih memerlukan identifikasi. Oleh karena itu, penelitian ini bertujuan untuk mengidentifikasi pola unmet need alat kontrasepsi modern di Indonesia berdasarkan karakteristik dan wilayahnya. Penelitian ini merupakan data sekunder dengan panel survei dengan pendekatan kuantitatif pada analisis Data Survei Demografi dan Kesehatan Indonesia SDKI 2007, 2012 dan 2017 dengan sampel utama adalah wanita usia subur (15-49 tahun) baik yang menggunakan/tidak menggunakan suatu metode kontrasepsi. Penelitian dimulai dari penyaringan data, imputasi data dan analisis deskriptif. Kecenderungan kejadian unmet need meningkat sebesar 8% dalam sepuluh tahun terakhir dengan unmet need dengan tujuan menjarangkan meningkat 1,5% dan unmet need dengan tujuan membatasi meningkat 6,5%. Tidak ada perbedaan karakteristik yang signifikan antara Pasangan Usia Subur baik di perkotaan maupun di pedesaan. Tren unmet need kontrasepsi modern meningkat seiring dengan meningkatnya penggunaan tradisional. dan peningkatan unmet need modern lebih dominan di Indonesia bagian timur, sehingga perlu adanya peningkatan promosi terkait penggunaan alat kontrasepsi modern di Indonesia dan perlu adanya perlakuan yang berbeda untuk peningkatan alat kontrasepsi modern sesuai dengan kondisi geografis dan sosial budaya setempat.Kata Kunci: Unmet need, Kontrasepsi modern, Indonesia, SDKI
Variability in surveillance practice for patients with diagnosis of bicuspid aortic valve syndrome
Authors: Kahler-Quesada Arianna , Vallabhajosyula Ishani , Yousef Sameh , Mori Makoto , Assi Roland , Milewski Rita , Geirsson Arnar , Vallabhajosyula Prashanth
Published: October 2021

Background/Aim: In patients with bicuspid aortic valves, guidelines call
for regular follow-up to monitor disease progression and guide timely
intervention. We aimed to evaluate how closely these recommendations are
followed at a tertiary care center. Methods: This was retrospective
cohort study at a tertiary care center. Among 48,504 patients who
received echocardiograms between 2013-2018, 245 patients were identified
to have bicuspid aortic valve. Bivariate analyses compared patient and
echocardiographic characteristics between patients who did and did not
receive follow-up by a cardiovascular specialist. Results: The mean age
of the cohort was 55.2  15.6 years and 30.2% were female. During a
median follow-up of 3.5  2.2 years, 72.7% of patients had at least one
visit with a cardiovascular specialist after diagnosis of bicuspid
aortic valve by echocardiogram. Patients followed by specialists had a
higher proportion of follow-up surveillance by echocardiogram (78.7%
vs. 34.3%, p< .0001), or by CT or MRI (41.0% vs. 3.0%, p
< .0001), and were more likely to undergo valve or aortic
surgery compared with patients not followed by specialists. Patients
with moderate to severe valvular or aortic pathology (aortic
stenosis/regurgitation, dilated ascending aorta) were not more likely to
be followed by a cardiovascular specialist or receive follow-up
echocardiograms. Conclusions: Follow-up care for patients with bicuspid
aortic valve was highly variable, and surveillance imaging was performed
sparsely despite guidelines. There is an urgent need for surveillance
and clinical follow-up mechanisms to monitor this patient population
with increased risk of progressive valvulopathy and aortopathy.
Amplicon_sorter: a tool for reference-free amplicon sorting based on sequence similarity and for building consensus sequences
Authors: Vierstraete Andy , Braeckman Bart
Published: October 2021

Oxford Nanopore Technologies (ONT) is a third-generation sequencing
technology that is gaining popularity in ecological research for its
portable and low-cost sequencing possibilities. Although the technology
is primarily developed for long-read sequencing, it can also be applied
to sequence amplicons. The downside of ONT is the low quality of the raw
reads. Hence, generating a high-quality consensus sequence is still a
challenge. We present Amplicon_sorter, a tool for reference-free
sorting of ONT sequenced amplicons based on their similarity in sequence
and length and for building solid consensus sequences.
Chaotic Mixing in a Free Helix Extruder using a New Solution to the Biharmonic Equation
Authors: Campbell Gregory , Taylor Ross , Wetzel Mark , Bomma Sirisha , Chempath Shaji , Hunt Diana , Powers David , John Samuel St.
Published: October 2021

A recently published approach for modeling the cross flow in an extruder
channel using a new solution to the biharmonic equation is utilized in a
study of chaotic mixing in a free helix single screw extruder. This
novel extruder was designed and constructed with the screw flight, also
referred to as the helix, detached from the screw core. Each of the
screw elements could be rotated independently to obtain chaotic motion
in the screw channel. Using the new extruder, experimental evidence for
the increased mixing of a dye, for both a Dirac and droplet input, with
a chaotic flow field relative to the traditional residence time
distribution is presented. These experimental results are compared using
the new biharmonic equation-based model. Because of the ability to
periodically rotate only the flight/helix, the chaotic mixing results
are minimally confounded by the existence of Moffat eddies.
Influence of ZnO addition and milling process on structure and conductivity of BaCe0.2Zr0.7Y0.1O3-δ ceramics
Authors: Ouba Ana Ana Kaori de Oliveira , Chinelatto Adilson , Grzebielucka Edson , Ramos Kethlinn , Borcezi Janaina , Chinelatto Adriana
Published: October 2021

Precursor powders for BaCe0.2Zr0.7Y0.1O3-?(BCZY27) ceramics were synthesized
by a modified Pechinimethod and calcined at 900?C for 12 h. The calcined
BCZY27 powders were milled in eccentric and in high energy mill with the
addition of 2 and 4mol% ZnO as sintering aid. The effects of milling and
sintering aids on the sinterability and electrical conductivity were
studied. The linear shrinkage in thermomechanical analyses started at 1050?C for the BCZY27 with 4mol% ZnO processed in eccentric mill. Theoretical
density above of 90%TD was obtained for the BCZY27 milled with 4mol% ZnO and
sintered at 1400?C for 4h. X-ray diffraction analysis of the BCZY27
ceramics sintered at 1400?C confirmed the presence of BaCe0.2Zr0.7Y0.1O3-?
and Y0.4Ce0.6O1.8 phases. The incorporation of Zn into perovskite lattice
leads to the secondary phase formation. SEM and EDS analyses confirmed the
presence of Y0.4Ce0.6O1.8 phase. The sintering was assisted by BaO-ZnO
eutectic, which was reflected by the increase of activation energy values
for grain boundary conduction. The milling processing did not affect the
conductivity properties. The obtained BCZY27 dense sample has conductivity
of 7.60 ? 10?3 S/cm at 500?C.
Differences in finished case quality between Invisalign and traditional fixed appliances:
Authors: Lin Eric , Julien Katie , Kesterke Matthew , Buschang Peter H.
Published: October 2021

Objectives

To compare the treatment and posttreatment effects of Invisalign aligners that incorporated SmartForce features and attachments to traditional fixed appliances.

Materials and Methods

This randomized controlled trial included 66 patients, 32 aligners, and 34 fixed-appliance patients. The median ages of the aligner and braces patients were 26.7 (interquartile range [IQR]: 9.8) and 25.9 (IQR: 16.6) years, respectively. Pretreatment occlusion was assessed using the ABO Discrepancy Index. Posttreatment (T1) and 6-month retention (T2) occlusions were quantified using the ABO Objective Grading System (OGS) scores.

Results

The braces group finished treatment significantly (P < .001) earlier (0.4 years) than the aligner group. The median DI scores for the aligner and braces groups were 4.5 and 7.0, respectively, which was a statistically significant (P = .015), but clinically insignificant, difference. There were no statistically significant between-group differences for the total OGS scores or any of the individual component scores at debond (T1) or after 6 months of retention (T2). During the posttreatment period, alignment and overjet worsened significantly in the aligner group, while buccolingual inclinations and occlusal relations improved. Over the same period, alignment worsened in the braces group and buccolingual inclinations improved. There was no statistically significant between-group difference in posttreatment changes of the total OGS scores.

Conclusions

While patients with simple malocclusions require 4.8 months longer treatment times with aligners than traditional braces, the treatment and 6-month posttreatment occlusal outcomes are similar.
Adaptational changes in clear aligner fit with time:
Authors: Linjawi Amal I. , Abushal Amal M.
Published: October 2021

Objectives

To analyze adaptational changes in clear aligner fit after intraoral usage at different sets of time.

Materials and Methods

Eight Invisalign appliances (Align Technology, San Jose, California, USA) were collected after intraoral usage. Acrylic imprints of the lower incisor region were constructed for each appliance at T0 (unused appliance). Two appliances were then used intra-orally for each of the following defined periods of time: 3 days, 7 days, 10 days, or 15 days. Used aligners were adapted on its T0 imprint and both were sectioned buccolingually from the distal surfaces of each incisor at the attachment area. Eight surfaces were collected for each set of time (n = 32 surfaces). Microphotographs of obtained sections and micrometric measurements of aligner fit were recorded at five different levels using scanning electron microscopy (SEM). Mean values of the fit changes (gap width) and group comparisons were statistically analyzed using analysis of variance and Tukey's post hoc tests. Significance level was set at P < .05.

Results

Highly significant differences in aligner fit were found at the different time points assessed (P < .001) with the least mean gap width at 15 days (176 ± 98 μm) and the highest at 7 days (269 ± 145 μm). Significant differences in aligner fit at different attachment levels were also found (P < .01) with the least mean gap width at the middle of the labial surface of the attachment (187 ± 118 μm).

Conclusions

The 15-day period of intraoral aligner wear might still be recommended as it showed the best adaptation and least gap width between the aligner and the attachment.
COVID-19, Hyperglycemia, and New-Onset Diabetes
Authors: Khunti Kamlesh , Del Prato Stefano , Mathieu Chantal , Kahn Steven E. , Gabbay Robert A. , Buse John B.
Published: October 2021

Certain chronic comorbidities, including diabetes, are highly prevalent in people with coronavirus disease 2019 (COVID-19) and are associated with an increased risk of severe COVID-19 and mortality. Mild glucose elevations are also common in COVID-19 patients and associated with worse outcomes even in people without diabetes. Several studies have recently reported new-onset diabetes associated with COVID-19. The phenomenon of new-onset diabetes following admission to the hospital has been observed previously with other viral infections and acute illnesses. The precise mechanisms for new-onset diabetes in people with COVID-19 are not known, but it is likely that a number of complex interrelated processes are involved, including previously undiagnosed diabetes, stress hyperglycemia, steroid-induced hyperglycemia, and direct or indirect effects of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) on the β-cell. There is an urgent need for research to help guide management pathways for these patients. In view of increased mortality in people with new-onset diabetes, hospital protocols should include efforts to recognize and manage acute hyperglycemia, including diabetic ketoacidosis, in people admitted to the hospital. Whether new-onset diabetes is likely to remain permanent is not known, as the long-term follow-up of these patients is limited. Prospective studies of metabolism in the setting of postacute COVID-19 will be required to understand the etiology, prognosis, and treatment opportunities.
Learning Videos Increase Students' Cognitive Learning Outcomes on Animal Life Cycle Materials
Authors: Kuncoro Indria Adi , Hidayati Yulia Maftuhah
Published: October 2021

Learning media has an important role in the implementation of learning in the current era of globalization. Therefore, we need an interactive learning media that can improve student learning outcomes. This study aims to improve students' cognitive learning outcomes on animal life cycle material using video learning on animal life cycle material for fourth grade students. This research is a classroom action research (CAR) which adapts the CAR model from Kemmis and McTaggart. The subjects in this study were grade IV students, totaling 33 students. Data was collected using an instrument in the form of a cognitive test of learning outcomes. The data that has been collected is then analyzed using a comparative descriptive method, namely by comparing the results from the pre-cycle stage to the second cycle. The results showed that the average score of students in the pre-cycle was 72 (33%) and the average in the first cycle was 80.30 (76%) and the second cycle average was 91.21 (90%). Based on these results, it can be concluded that the use of learning videos can improve students' cognitive learning outcomes for animal life cycle materials.
Understanding Plant Reproductive System through Animated Videos with Project-Based Learning Activities
Authors: Dewi Jumaheni I Gusti Ayu Irma , Rati Ni Wayan , Sudarma I Komang
Published: October 2021

This research was conducted based on the lack of learning media that can be used through online and offline learning in the Covid-19 pandemic situation, limiting face-to-face learning. The main purpose of this study was to determine the development process and the validity of project-based learning-oriented animation videos on the theme of saving living things, especially on the topic of plant reproduction. The development of this animated video media used the ADDIE development model. The research subjects for developing project-based learning-oriented animation videos were two content experts, two learning design experts, two learning media experts, individual trials, and small group trials. The method of data collection was in the form of a questionnaire. The results of data analysis showed that the average score of material experts was 4.79 with very good qualifications, design experts 4.65 with very good qualifications, media experts at 4.62 with very good qualifications, individual tests of 4.8 with very good qualifications, and a small group test of 4.74 with very good qualifications. Thus, the overall validity of Project-Based Learning-oriented animation video media was in the range of 4.01 < X 5.01 with "very good" qualifications. So, Project-Based Learning-oriented animated video media on the theme of Save Living Creatures was feasible to use in learning.
Improving Students’ Understanding of Animals’ Movement Organs through VideoScribe-based Learning
Authors: Sukadana I Kadek , Japa I Gusti Ngurah
Published: October 2021

Teachers do not apply interesting learning models that can stimulate students in learning. In addition, the lack of learning media that can facilitate students in learning has an impact on students' low science learning outcomes. This study aims to develop a learning video about Animal Movement Organs to improve students' understanding in learning. This type of research is development research. The model used to develop the product is ADDIE. Techniques that collect data are interviews and questionnaires. The instrument used to collect data is a questionnaire. The subjects of this study amounted to 4 experts. The analysis technique in this research is descriptive qualitative statistical analysis and descriptive quantitative. The results of the research are the test results from the content experts of the developed media subjects get a value of 4.71 (very good), the test results from the learning media experts get a value of 4.75 (very good) and the results of the validity test of the developed media teachers get a value of 4 .83 (very good). It can be concluded that the learning video media regarding animal movement organs based on video scribe is feasible to be applied in learning. The implication of this research is that the developed media can make it easier for students to understand the material of animal movement organs and can facilitate students in independent learning.
The Effectiveness of PBL Models Based on Google Meet on the Ability of Mathematical Problem Solving
Authors: Safitri Danis , Nurafni Nurafni
Published: October 2021

Pandemic Covid-19 has a big influence on various sectors, including the education sector. This makes educators make an innovation in the learning model, which combines a model of PBL-based google meet. The purpose of this study is to analyze the presence or absence of the influence of the PBL models based on google meets on the ability of mathematical problem-solving in grade IV during distance learning. The type of research used by researchers, namely quantitative. With research design a quasi-experiment with posttest only group design. Subjects in this study were students of class IV as many as 64 students. Data collection techniques interviews and tests. While the research instrument is in the form of a posttest. Data analysis used is descriptive analysis, a test of homogeneity, normality test, hypothesis test (t-test), and test the effect size. The results showed that the average value of the posttest experimental class of 76,25 higher than the control class that is 62,18. In hypothesis testing via t-test obtained the value of sig 0.47 that where the value is smaller than α=0.05 so that H0 is rejected and H1 is accepted. This means that there is an influence of the use of PBL models based on google meet on the ability of mathematical problem-solving in grade IV. So, the use of PBL models based on google meet can be applied to learning online.
E-learning During COVID-19 in a Medical College
Authors: Almuzaini, MD Hanan I.
Published: October 2021

Recently, many medical schools shifted from live lectures to online lecture by reducing classic lectures with using more technology. E-learning increased all over the world during the period of the spread of the COVID-19 virus. In addition, it is important to know if such learning strategies are advantageous. This will help institutions consider how to distribute their funding resources for platform design and online learning.
Assessment of Barriers to Exclusive Breast Feeding Among Working Saudi Mothers
Authors: Albezrah Nisreen Kh. Aref , Alshehri Haneen Ali , Alswat Raghad Hilal , Almalki Manal Saeed , Al fuhayd Atheer Mohammed , Alkenany Reem Abdullah , Alswat Shrooq Homood , Alzahrani Khames T.
Published: October 2021

Background: The World Health Organization and the United Nations International Children’s Fund recommend mothers to exclusively breastfeed their infants for the first six months of their life that should be initiated within the first hour after birth. Methods: This cross-sectional study included currently employed Saudi working mothers residing the Western region of Saudi Arabia. A self-administered questionnaire was distributed through email and social media. Each person meeting the inclusion criteria was provided informed consent, explaining the study aim, and ensuring the confidentiality of information. Data were obtained by filling out the designed Questionnaire. Result: This study included 692 working Saudi mothers. The frequency of exclusive breast feeding was 40.2%, which was continued by 29.8% only after returning to the work. Insufficient breast milk secretion (17.5%) and the lack or minimal support from the workplace for EBF (6.6%) were commonly stated by the mothers. There were great deficiencies in the breastfeeding friendly work policies including the absence of breast feeding or breast milk-pumping place (86.4%), absence of breastfeeding hours during work time (80.9%), and the presence of a strict full-time schedule that did not allow freely use of the nursing break. Conclusion: The present study shows low prevalence of exclusive breast feeding among working mothers in the Western region of Saudi Arabia. Multiple barriers to continuing breast feeding have been detected. Insufficient breast milk secretion and the lack of breastfeeding friendly work policies were common reasons.
Comparative research of quality indicators of measuring instruments: practical aspects
Authors: Velychko Oleh , Gordiyenko Tatiana
Published: October 2021

The main purpose of modern measuring instrument MI is to perform accurate and reliable measurements in order to obtain complete and reliable measurement information. The MI must be of proper quality, which must be reliably assessed. For technical means, traditional quality indicators have been established, some of which are common to MI. The metrological characteristic is unique to a MI and can be considered one of the most important of MI indicators.

The quality of MI is characterized by a certain system of quality indicators. Depending on MI group, the system of quality indicators can differ. The target indicators are specific for each type of product. These indicators require additional analysis. The main metrological characteristics should be referred to the target indicators of MI. For some MI categories, additional indicators can be established, and for others, they are excluded.

The methodology of evaluation of MI quality indicators and algorithm of its realization are offered. The digital multimeters as category of MI have been selected for practical comparative evaluation of MI quality indicators. The ten indicators for this category of MI have been refined. Comparative expert evaluation of quality indicators of 12 multimeters was carried out with the involvement of a group of 34 metrology experts. The weight of each of the 10 selected MI quality indicators was determined. The results of expert evaluation of multimeter are presented.
Level gauges. Application features
Authors: Narodnytskyi Gennadiy , Suhomlinov Evgeniy , Tiupa Svitlana , Marchenko Oleksandr
Published: October 2021

This paper considers various aspects of application of the most common types of level gauges – magnetostrictive, servo-driven, radar and reflex. Much attention is paid to accuracy of level gauges, expressed in error and uncertainty, including those referred to the legally regulated measuring instruments. Due to the fact that the most of the level gauges are installed on tanks, the requirements for them, given in the standards, and possible ways to improve the accuracy of level gauges installed on tanks have been analyzed. Methods of verification and calibration of level gauges are considered, including both verification on standard units using water, and carried out by the simulation method.

The requirements for the metrological control of level gauges with moving parts are stated. It is shown that for verification of such level gauges, it is necessary to carry out measurements when the water moves both up and down. However, there is no need to take measurements, as in determining the variation, at the same points when the water moves up and when the water moves down.

Some known caution is needed when using the results of the verification of level gauges by the simulation method. Especially big differences in the results of verification on the standard unit with water and the simulation method are observed for magnetostrictive level gauges.

This difference is due to the fact that in these level gauges, the float slides along the pipe with a certain friction, and in the simulation method, the float moves by hand and its movement does not depend on friction.
Boosted with Online Learning to Improve English Language Teachers’ Proficiency
Authors: Dewie Szarmilaa , Norman Helmi , Md. Yunus Melor
Published: October 2021

Language teaching and learning have been significantly transformed by the advent of online technology. Learning and information-gathering have been dramatically boosted by technology. Owing to online learning, physical geography is no longer a major obstacle. However, there has not been much study to portray online technologies and online learning improving teachers’ proficiency in the English language. With this in mind, the purpose of this study was to investigate the extent to which online learning has improved teachers’ language proficiency. About 201 teachers from eight districts in Malaysia were enrolled in an online course. The study was conducted online for three months. Data was collected from an evaluation survey obtained at the end of the period. Responses gathered based on descriptive analysis of the course content, overall experience, and comments derived from the survey was then analyzed from the data. The findings revealed that the teachers are very positive towards the course and found it constructive in enhancing their professional development. The results also indicated that teachers have also improved their language component upon being enrolled in the course. These documents that all the language skills have been enhanced, and they are very motivated. Therefore, future research should focus on a specific language component in order to gain a deeper insight of continuum from this study.
Введение в АСД. Нерелятивистское уточнение динамики Ньютона: Са-моучитель. Препринт.
Authors: Рыков Валерий
Published: October 2021

Абсолютная субстанциальная динамика (АСД) уточняет принципы и методы теоретической механики, тем самым расширяя область её ответственности на любые скорости и предсказывая новые физические явления.

Самоучитель по АСД поможет студентам вузов, аспирантам и специалистам освоить уточнённую теорию и методику решений задач теоретической и небесной механики, космической динамики, физики частиц высоких энергий, геофизики и оптики движущихся тел.

Любознательных читателей привлечёт последний раздел с ответами на актуальные вопросы по тематике книги.