bluuebunny/crossref_metadata_2025 huggingface dataset:
Association of Positive and Negative Feelings with Anxiety and Depression Symptoms among Computer Science Students during the COVID-19 Pandemic
Authors: Soares Passos Lígia Maria , Murphy Christian , Chen Rita Zhen , Santana Marcos Gonçalves , Passos Giselle Soares
Published: April 2022

The global COVID-19 pandemic has had a significant impact not just on physical health, but also on mental health. Previous studies have demonstrated that Computer Science (CS) students are particularly vulnerable to mental illness. This paper presents a study describing the changes in CS students' positive and negative feelings during the pandemic and social isolation, as well as activities used to cope with this new situation. Our evaluation shows that 81.0% of students reported that their well-being had been negatively affected by the pandemic, with the most reported concerns including social isolation, delay in their academic progress, risk of contamination, and death of loved ones, with discouragement, uncertainty, and stress being the negative feelings that increased the most. Our study also showed that these negative feelings correlated with a higher prevalence of anxiety and depression symptoms, and that the impact was more pronounced in female students than in male students.
Fingerprints in a Computer Science Course Profile: Early results from the IFNMG DataWarehouse
Authors: Eleuterio Igor , Bedo Marcos , Oliveira Daniel de , Olmes Luiz , Santos Lucio
Published: April 2022

This manuscript reports the implementation of an Educational Data Warehouse (EDW) at the Federal Institute of North of Minas Gerais by using data from the academic system called Cajuí. The logical model of the system is the Fact Constellation with data persisted into the relational DBMS PostgreSQL. After the loading and setting of the EDW, we ran a set of analytic queries regarding courses from the Computer Science bachelor course at the IFNMG campus of Montes Claros for the 2013/2020 timespan. The data analysis indicates: (i) there were no significant differences in the academic performances of students enrolled by either standard entrance or Brazilian SISU exams, (ii) the number of unofficial dropouts reached up to 19% of students, (iii) the 19.51% of students that took a leave of absence and 15.38% of dropout bachelor candidates had completed at least 1/3 of courses from the entire graduation process, (iv) the first-year courses had more failing students than final-year courses, and the average grade of final-year courses was higher than those of other years, and (v) nearly 60% of students had at least one failure in either Algorithms and Data Structures or Calculus courses.
Estudantes com Deficiência Visual em Computação: participação, perspectivas e desafios enfrentados
Authors: Alves Lais Farias , Rocha Larissa , Pereira Cláudia Pinto , Machado Ivan , Viana Windson , Almeida Junior Nailton
Published: April 2022

Políticas públicas e mudanças institucionais nas últimas décadas foram fundamentais para o aumento do número de estudantes com deficiência visual (EDV) no ensino superior, sendo esse aumento também observado para os cursos de Computação. Neste contexto, o presente trabalho apresenta o perfil dos EDV que ingressam nesses cursos, suas percepções do ensino de conteúdos voltados para acessibilidade e tecnologia assistiva (TA) e quais os tipos de acessibilidade que ainda necessitam ser mais presentes para promovera inclusão desses estudantes. A partir de um survey com 45 EDV no Brasil, percebeu-se que (i) 68,9% dos estudantes ingressantes tiveram contato anterior com cursos de informática; (ii) ainda há um déficit no ensino de conteúdos relacionados à acessibilidade e à TA, e (iii) especialmente, as acessibilidades Instrumental, Atitudinal e Metodológica precisam estar mais presentes no ambiente acadêmico.
Ensino de habilidades socioemocionais: um estudo de caso empregando mídias audiovisuais e conversação online
Authors: Araújo Julian , Silva Laiza Ribeiro , Jaques Patricia A.
Published: April 2022

Na atualidade, dispomos de diversas opções midiáticas que podem ser utilizadas como recurso tecnológico para o ensino. Redes sociais, ebooks, quadrinhos, vídeos, curtas e aplicativos móveis são alguns exemplos. Nesse contexto, as diversas mídias podem ser adotadas como estratégias para auxiliar estudantes no desenvolvimento de competências socioemocionais no ambiente de ensino. Este trabalho tem como objetivo observar o uso de curta-metragem como recurso tecnológico na compreensão de competências socioemocionais em estudantes de ensino superior. Os resultados demonstraram que o uso de curta-metragem compreende importante instrumento pedagógico na compreensão de habilidades como empatia, percepção de contexto e colaboração.
Analisando os Dados do Percurso Acadêmico do Curso de Sistemas de Informação para Auxiliar na Revisão do PPC
Authors: Nascimento Roberto P. , Sousa Gabriela D. S. de , Nascimento Mariana W. B. , Reis Josivan R.
Published: April 2022

O número de ingressantes na educação superior aumentou com a ampliação das políticas públicas voltadas ao setor educacional. Com isso, novas problemáticas passaram a ganhar destaque no meio acadêmico, tais como a evasão. Dessa forma, este trabalho propõe analisar os dados do percurso acadêmico do curso de Sistemas de Informação da Universidade Federal do Oeste do Pará (UFOPA), com o objetivo de reunir contribuições para auxiliar na revisão do Projeto Pedagógico do Curso (PPC) como forma de identificar e minimizar as causas da evasão. Assim, através do método de extração de dados semi-automatizadas, foram desenvolvidas análises que responderam as questões de pesquisa e subsidiaram na identificação das principais melhorias a serem implementadas no PPC.
Os Pequenos Inventores: Um Recurso para o Ensino de Computação para Crianças
Authors: Santos Aline dos , Pereira Wellington , França Rozelma Soares de
Published: April 2022

O ensino de computação na escola tem sido um tema cada vez mais discutido, sendo foco de políticas educacionais nacionais recentes. Em paralelo, estratégias e materiais didáticos para sua implementação também têm sido alvo de investigações. Neste contexto, esta pesquisa busca criar um material didático de Computação para o Ensino Fundamental I. Como primeira etapa desse processo, uma revisão sistemática de literatura nos cenários nacional e internacional foi realizada visando identificar os efeitos que diferentes táticas de implementação de atividades - plugada, desplugada e híbrida - podem provocar sobre a aprendizagem dos estudantes. A etapa seguinte envolveu a avaliação dos materiais didáticos retornados na revisão, onde foi identificada a necessidade de recursos híbridos em português, voltados aos anos iniciais do Ensino Fundamental, e que explorem os eixos Cultura Digital e Mundo Digital, indo além do Pensamento Computacional; fornecendo ainda apoio ao professor para seu uso pedagógico. Tais resultados subsidiaram a criação do livro “Os pequenos inventores” que busca apoiar o ensino de Computação no Ensino Fundamental I e cobre as lacunas ora reportadas. Para guiar o seu desenvolvimento, técnicas de Design Thinking foram empregadas, perfazendo da ideação até a prototipação do material, o qual será apresentado neste artigo.
Plataforma para auxílio na preparação de estudantes para as avaliações do ENADE e POSCOMP
Authors: Ribeiro Tiago Correia , Córdova Junior Wilson Fernandes , Castello Branco Neto Wilson
Published: April 2022

Este artigo apresenta uma plataforma composta por um Web Service, um Sistema Web e um Aplicativo Mobile, que auxilia os estudantes da área de Computação na preparação para os exames ENADE e POSCOMP por meio da resolução de simulados. Com uma base de mais de 1500 questões das edições anteriores destas provas, os sistemas permitem o acompanhamento da evolução dos alunos por meio de gráficos de desempenho categorizados por áreas e disciplinas. Uma avaliação realizada por alunos e professores mostra que mais de 80% dos participantes consideraram o sistema bom ou muito bom, assim como a sua contribuição na preparação para os referidos exames.
A Study on Approximate Matching for Similarity Search: Techniques, Limitations and Improvements for Digital Forensic Investigations
Authors: Moia Vitor Hugo Galhardo , Henriques Marco Aurélio A.
Published: April 2022

With the rapid increase in data storage capacity, the use of automated procedures to handle the massive volume of data available nowadays is required by digital forensic practitioners. The Known File Filtering is one of the techniques employed to reduce/separate data (based on their hash values) for analysis, using a list of interest objects. However, due to the limitation of hashes in this scenario (inability to detect similar objects), new methods have been designed. These functions, called Approximate Matching (AM), are possible candidates to perform such a process because they can identify similarity in a very efficient way by creating and comparing compact representations of objects. In this work, we show how to perform the similarity search task (using AM) more efficiently using the Similarity Digest Search Strategies and perform a detailed analysis. Given the limitations found, we also propose a new strategy. Furthermore, we address some limitations of AM tools regarding the similarity detection, where many matches pointed out as similar, were indeed false positives. Another improvement made was in the comparison function of one of the most known AM tools after a theoretical assessment of it. We identified and mitigated some limitations, proposing a new and more precise similarity measurement. New applications of AM are also presented and analyzed: One for fast file identification (using sampling) and another for efficient fingerprint identification. This text is a summary of a Doctor of Science thesis presented and approved in Feb./2020 at the School of Electrical and Computer Engineering, University of Campinas, S˜ao Paulo, Brazil, and submitted to the Thesis and Dissertations Competition of SBSeg 2020.
Improving cloud based encrypted databases
Authors: Cominetti Eduardo Lopes , Simplicio Junior Marcos Antonio
Published: April 2022

Databases are a cornerstone for the operation of many services, such as banking, web stores and even health care. The cost of maintaining such a large collection of data on-premise is high, and the cloud can be used to share computational resources and mitigate this problem. Unfortunately, a great amount of data may be private or confidential, thus requiring to be protected from both internal and external agents. Moreover, this data needs to be manipulated to provide useful information to its owner. In this dissertation, we propose modifications to CryptDB, a state-of-the-art encrypted cloud database, aiming to enhance its efficiency, flexibility and security; this is accomplished by improving or changing its underlying cryptographic primitives.
Secure and efficient software implementation of QC-MDPC code-based cryptography
Authors: Guimarães Antonio , Aranha Diego F. , Borin Edson
Published: April 2022

The emergence of quantum computers is pushing an unprecedented transition in the public key cryptography field. Algorithms in the current standard are vulnerable to attacks using quantum computers and need, therefore, to be replaced. Cryptosystems based on error-correcting codes are considered some of the most promising candidates to replace them for encryption schemes. Among the code families, QC-MDPC codes achieve the smallest key sizes while maintaining the desired security properties. Their performance, however, still needs to be greatly improved to reach a competitive level. In this work, we optimize the performance of QC-MDPC code-based cryptosystems through improvements concerning both their implementations and algorithms. We first present a new enhanced version of QcBits’ key encapsulation mechanism, which is a constant time implementation of the Niederreiter cryptosystem using QCMDPC codes. Comparing with the current state-of-the-art, the BIKE implementation, our code performs 1.9 times faster when decrypting messages. We then optimize the performance of QC-MDPC code-based cryptosystems through the insertion of a configurable failure rate in their arithmetic procedures. Using a failure rate negligible compared to the security level (2􀀀128), we achieve speedups of 1.6 to 2 times in some arithmetic algorithms. By inserting these algorithms in our enhanced version of QcBits, we were able to achieve a speedup of 1.9 on the key generation and up to 1.4 on the decryption time. Comparing with BIKE, our final version of QcBits performs the uniform decryption 2.7 times faster. Moreover, the techniques presented in this work can also be applied to BIKE, opening new possibilities for further improvements.
Como ofertar aplicações web Python como um provedor de serviço Shibboleth usando microsserviços
Authors: Cardoso Felipe dos Passos , Andrade Allex Magno , Mello Emerson Ribeiro de , Felicissimo Carolina Howard , Wangham Michelle Silva
Published: April 2022

O framework Shibboleth fornece um módulo para o servidor HTTP Apache que permite que este entregue, de forma transparente, asserções SAML para suas aplicações. Aplicações web Python são comumente disponibilizadas na Internet por meio de dois servidores: um de aplicação, que implementa WSGI; e um HTTP, que atua como proxy. Na arquitetura de microsserviços, é desejado que os servidores, necessários para execução de aplicação, sejam distribuídos de forma que se tenha somente um serviço em execução por contêiner. Este trabalho apresenta uma forma de composição de contêineres para ofertar uma aplicação web Python como um provedor de serviço Shibboleth dentro do contexto da arquitetura de microsserviços.
Library Application for a Fair, Traceable, Auditable and Participatory Drawing Tool for Legal Systems
Authors: Silva Marcos Vinicius M. , Simplicio Jr. Marcos A.
Published: April 2022

Several applications require random sampling to be protected against a biased behavior. When conflicting parties have different interests in its result, the system must guarantee that collusion among any number of entities cannot influence the resulting computation. Such is the case of legal systems, in which jurors and judges must be randomly picked to ensure impartiality in judicial cases. However, when informational systems are used to generate randomness, it should also provide auditability of its mechanisms to promote confidence in its fairness. This article presents a tool of one such mechanism that combines the randomness provided by hash functions with active social engagement. Each stakeholder in a legal proceeding contribute with his/her own share to the drawing, so that fairness is achieved if at least one entity is honest. Any interested party can audit a drawing using only public information, and misconduct of any party can be traced back to the culprit as soon as the result is computed. Our open-source implementation provides security by design, not depending on the secrecy of its component to attain all the required security properties.
MinimalisticWAF: Um Web Application Firewall baseado em ganchos de APIs I/O
Authors: Oliveira Muryllo Pimenta de , Silva Carlo Marcelo Revoredo da
Published: April 2022

Muitos servidores na web são protegidos somente por firewalls baseados em proxy e são vulneráveis à ataques direcionados à protocolos da camada de aplicação. Esse artigo aborda um modelo de firewall standalone que fica residente na camada de aplicação exigindo o mínimo de alterações possível na implementação. Resultados mostraram que a tecnologia conteve diversos ataques no endereço real do servidor oriundos de botnets procurando por serviços de bancos de dados vulneráveis, aplicações com livre acesso a upload de arquivos e rotas com autenticações e interpretadores de código shell quebrados. Essa proteção foi obtida por meio de técnicas de gancho de funções de escrita e leitura no soquete de rede e comparações com a pilha de listas discricionárias de acesso e filtros de requisições presentes no firewall. Inferiu-se, portanto, que o Minimalistic WAF fornece proteção auxiliar às aplicações hospedadas em servidores node.js que sofrem ataques diretos ao endereço real, tornando a aplicação duplamente protegida.
Proposta de Carimbo do Tempo Descentralizado e Preciso para a ICP-Brasil utilizando Sistemas Embarcados e Criptografia Pós-Quântica
Authors: Estevam Gabriel , Vigil Martín
Published: April 2022

O modelo de Carimbo do Tempo aceito juridicamente no Brasil é o baseado em Autoridades de Carimbo do Tempo (ACT), regulamentadas pela Infraestrutura de Chaves Públicas Brasileira (ICP-Brasil). Contudo, o modelo está sujeito a problemas causados pela centralização e pelo método de obtenção do carimbo. Diante disso, este trabalho propõe um dispositivo de carimbo do tempo compacto, de baixo custo e com criptografia pós-quântica. O dispositivo é apresentado como uma modificação no modelo de carimbo do tempo da ICPBrasil com o objetivo de minimizar a centralização e aumentar a precisão de tempo. Por fim é apresentado uma prova de conceito e uma série de experimentos que mostram a factibilidade e eficácia do dispositivo.
Provendo controle de acesso para o Sistema de Telessaúde Holográfico da UFF através de um protocolo de autenticação de três fatores
Authors: Silva Nicolas F. M. da , Fernandes Natalia C.
Published: April 2022

O Sistema de Telessaúde Holográfico da Universidade Federal Fluminense (STH-UFF) tem como objetivo oferecer apoio médico para locais com baixo contingente de especialidades através da realização de teleinterconsultas. O sistema vem sendo utilizado em ambientes controlados para pacientes do Exército Brasileiro e deve ser ampliado para unidades públicas de saúde. Contudo, essa ampliação acarreta no aumento da ameaça à exposição dos dados confidenciais das consultas. Neste artigo, é proposta uma arquitetura e implementação de um sistema de controle de acesso para o STH-UFF, baseado em uma autenticação multifator. São analisados os requisitos de segurança, o custo do projeto, a viabilidade computacional da aplicação e os trade-offs do sistema desenvolvido.
Document Validation using Blockchain A validation scheme for natural person’s documents
Authors: Meyer João V. , Palma Lucas M. , Martina Jean E.
Published: April 2022

A extensão do território brasileiro, combinado com sua demografia de mais de 200 milhões de habitantes, resulta em um sistema cartorário complexo, caro e lento. Tecnologias de blockchain podem ser de grande ajuda neste cenário. Elas nos provêm uma maneira distribuída de armazenar e validar dados em uma rede peer-to-peer descentralizada. Neste artigo, nós começamos a discussão sobre um sistema notarial nacional baseado em blockchain capaz de armazenar e validar registros públicos de pessoas naturais. Nós prototipamos uma solução que engloba os documentos de nascimento, casamento, divórcio e óbito. Ao final, são apresentados os custos operacionais do protótipo junto de uma comparação com o sistema cartorário utilizado atualmente.
Agentes de Análise e Detecção de Ataques Ransomware em Sistemas Linux
Authors: Miranda Cryslene Coêlho De Oliveira , Moreira Caio Carvalho , Teixeira Otávio Noura
Published: April 2022

Ransomware é um malware que afeta a segurança de dados de sistemas ou dispositivos. Ele bloqueia os arquivos de usuários criptografandoos e exige um resgate em troca da chave de descriptografia. Este trabalho apresenta o desenvolvimento de uma solução que visa detectar essa ameaça, em sistemas Linux, por meio de agentes estáticos. São utilizados algoritmos feitos em Python, auxiliados por três programas: inotify, file e strace. Foram realizados testes de validação, na perspectiva de apresentar a eficiência desses agentes.
Towards to fair trade with item validation using Bloom Filters and Smart Contracts
Authors: Reis Matheus Cunha , Sendin Ivan da Silva
Published: April 2022

Smart Contracts bring a new set of possibilities in the secure protocol development: participants gain guarantees of the correct execution of the protocol steps. In contrast, current Smart Contract solutions do not provide data privacy, this scenario is particularly bad in the commerce of e-goods. In this work, we present a fair trade protocol based Smart Contract and Bloom Filter for the problem of e-goods trading where the involved parts do not trust each other.
Smart Contracts como uma plataforma para computação segura
Authors: Silva Bianca Cristina da , Sendin Ivan da Silva
Published: April 2022

Os smart contracts representam novas possibilidades de aplicações, sendo o comércio eletrônico e organizações financeiras descentralizadas exemplos dessas aplicações, as quais são capazes de obter benefícios da confiança da correta execução de programas fornecidas por essa nova tecnologia. Todavia, ainda que vantajoso no aspecto de corretude, smart contracts sofrem com a perda de privacidade dos dados, pois, uma vez que utilizam uma estrutura descentralizada, os dados são acessíveis a todos os nós da rede. Nesse estudo, apresentamos o uso da computação segura multiparte no ambiente descentralizado oferecido pelos smart contracts.
Ferramenta de monitoramento gráfico para suporte à criação e testes de novos mecanismos de consenso em blockchains
Authors: Wolff Bryan , Martins Diego Fernandes Gonçalves , Henriques Marco Aurélio Amaral
Published: April 2022

A blockchain é um sistema de registro seguro e distribuído que necessita de um mecanismo de consenso capaz de definir quais novos blocos são inseridos à cadeia, a medida que são produzidos pelos participantes da rede. A análise da evolução de uma blockchain controlada por um novo mecanismo de consenso pode ser complexa. Para simplificar tal análise, este artigo apresenta o desenvolvimento de uma nova ferramenta para monitoramento da evolução dinâmica de uma blockchain. É apresentada em detalhes a arquitetura da mesma e sua integração com o protocolo Probabilistic Proof-of-Stake (PPoS).
Uma comparação de desempenho de algoritmos para criptografia pós-quântica
Authors: Amorim Pedro Rubbioli , Henriques Marco A. A.
Published: April 2022

Com a possível chegada do primeiro computador quântico operacional que poderá quebrar a segurança de algoritmos criptográficos assimétricos tradicionais, as entidades responsáveis por promover a segurança de dados têm se mobilizado a oferecer uma resposta para tal advento. Existem diversas propostas para um novo padrão de criptografia pós-quântica, cada uma baseada em um método matemático diferente. Este trabalho avalia as principais propostas que participam da segunda rodada do Processo de Padronização Criptográfica Pós-Quântica do NIST, apresentando as performances de umas em relação às outras. O objetivo deste artigo é ajudar usuários a fazer uma escolha mais informada.
Estudo comparativo de desempenho em Assinaturas Digitais Pós-Quânticas para plataformas de IoT
Authors: Nagata Vitor , Henriques Marco A. A.
Published: April 2022

Grandes avanços no campo da computação quântica têm aumentado a preocupação com a quebra de algoritmos criptográficos atuais, como RSA e ECC. Para manter a segurança e dos protocolos atuais, já estão sendo pesquisados algoritmos resistentes a ataques quânticos. Neste artigo, apresentamos algumas das ideias por trás dos novos algoritmos de assinatura pós-quânticos e comparamos seus desempenhos em dois contextos: um em ambiente de desktop e outro voltado para aplicações IoT.
U-Pb LA-ICP-MS DATING OF DETRITAL ZIRCON FROM UPPER PERMIAN SANDSTONE OF THE BOYEVAYA GORA SECTION (ORENBURG REGION, SOUTHERN CIS-URALS)
Authors: Chistyakova A. V. , Ivanov A. V. , Bryanskiy N. V. , Veselovskiy R. V. , Golovanova T. I. , Golubev V. K.
Published: April 2022

The first results of U-Pb LA-ICP-MS dating of 150 detrital zircon grains from the Upper Permian sandstone of the Boyevaya Gora section (Orenburg region, the Southern Cis-Urals) are presented. 95 conditional zircon U-Pb isotopic dates form two age peaks – 381 and 529 Ma. It is assumed that clastic material entered the sedimentation basin mainly due to erosion of the Early Hercynian Ural complexes and relics of the Protouralian-Timanian orogen.
THE APPLICATION OF SCANNING ELECTRON MICROSCOPY USING ENERGY- AND WAVELENGTH DISPERSIVE SPECTROMETERS FOR CHEMICAL DATING OF URANIUM MINERALIZATION ON THE EXAMPLE OF CARBONACEOUS SHALES OF THE DABANZHALGA SUITE (EAST SAYAN)
Authors: Belyanin D. K. , Karmanov N. S. , Airiyants E. V. , Zhmodik S. M.
Published: April 2022

On the one hand, the widespread use of electron microprobe analysis in the version of a scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS) and, on the other hand, the comparability of the metrological characteristics of the EDS and wavelength dispersive spectrometry (WDS) in the case of determining the major components of minerals are a favourable background for investigating the possibility of using SEM-EDS for chemical dating of uranium mineralization. Carbonaceous-siliceous formations of the Dabanzhalga suite are widespread in carbonate deposits of the Lower Paleozoic in the Oka structural-formational zone of the East Sayan and represent deep-water deposits of the back-arc basin. All varieties of carbonaceous-siliceous rocks of the Dabanzhalga suite are characterized by increased U, Au, Ag, Pt, Pd, Mo, V, P, Cu. Their amounts are 5–10 times higher than those for other black shale deposits of the Eastern Sayan. Uranium forms its minerals – uraninite and brannerite, in association with carbonaceous matter and sulfides, and is also part of anhydrous phosphates – xenotime, monazite. The paper presents data on the composition and dating of brannerite and uraninite in samples of carbonaceous-siliceous shale sampled at three sites: Uber-Zhadoy, Deed-Khara-Zhalga and Erye-Khara-Zhalga. The obtained estimates of the isochronous dates of uraninite and brannerite grains for these areas are 523±26, 506±10, and 511±17 Ma, respectively. It was shown that these dates could be compared with the age of metamorphism at the Sukhoi Log deposit, estimated using modern methods of isotope geochronology. It should be noted that the average estimates of the dates of uraninite and brannerite in all studied areas of the Dabanzhalga suite are lower than the corresponding estimates of the isochronous date, which is probably due to the partial loss of radiogenic lead. For the Uber-Zhadoy site, a comparison of the EDS and WDS data was carried out, and it was shown that when using the EDS data, there is an underestimation of the Pb content in uraninite, and, as a consequence, an underestimation of the age of uraninite.
INTERREGIONAL CORRELATION OF THE MIDDLE FRASNIAN (UPPER DEVONOIAN) OF THE NORTH-WEST OF THE RUSSIAN PLATE AND THE EAST OF THE PECHORA PLATE: AN ECOGEOCHEMICAL ASPECT
Authors: Zhuravlev A. V.
Published: April 2022

The paper provides an example of the first stratigraphic application of ecogeochemical method based on the analysis of the carbon isotope values in conodont elements. The method is based on hypothesis of almost isochronic regime change (at least within the basin) in isotope fractionation of carbon in pelagic ecosystems which is reflected and kept in carbon isotope composition of conodont elements. This method has been used to compare between different facial Frasnian sequences of the northwestern Russian Plate (coastal marine facies) and eastern Pechora Plate (depression facies). There were traces of three isotope excursions: negative in the vicinity of the MN5 zone basement (domanic horizon basement), negative at the boundary between the MN5 and MN6 zones, and double positive excursion in the upper MN6 zone. The amplitude of excursions is usually much less in the deep-water facies. The similarity of variations in carbon isotope composition of conodont elements in geographically remote and facially different Fransnian sedimentary sequences of the northwestern Russian Plate and eastern Pechora Plate confirms the possibility of using this parameter for stratigraphic correlation.
Les effets de la crise du covid-19 et des mesures de confinement sur le bien-être des enfants confiés à la protection de l'enfance
Authors: Toussaint Emmanuelle
Published: April 2022

A partir du 16 mars 2020, le confinement instauré en France pour ralentir la propagation de la pandémie de COVID-19 a eu une portée considérable. Les pouponnières, comme l’ensemble des autres institutions sur le territoire français, ont dû se réorganiser en cette période sanitaire inédite. L’objectif de cet article est de rendre compte des effets de la crise du covid 19 et notamment des mesures de confinement sur le bien-être des très jeunes enfants confiés à la protection de l'enfance. Les résultats de cette étude exploratoire révèlent certaines caractéristiques communes des impacts de la pandémie sur les enfants confiés et leur bien-être relationnel tout en envisageant plusieurs facteurs de risque ou de protection. Enfin, les implications de ces résultats pour la recherche et la pratique sont discutées. Comprendre en quoi le confinement a modifié les pratiques, et comment  celles-ci se sont révélée bénéfiques pour améliorer le bien-être  des enfants protégés permet d’identifier des facteurs ou leviers d’interventions favorables à la santé mentale et au bien-être de ce public aux besoins spécifiques.
Molecular detection of Fusarium infections in wheat: A measure of quality assessment
Authors: Popescu Sorina , Boldura Oana-Maria , Borozan Aurica , Madosa Emilian
Published: April 2022

This paper aimed to evaluate 50 wheat samples collected from different western Romanian locations based on microbiological, molecular, and toxicogenic assays to determine their correlation when species of the genus Fusarium were analyzed. The presence of toxins determined by biochemical ELISA (Enzyme-Linked Immunosorbent Assay), the DNA analysis based on PCR (Polymerase Chain Reaction), and even accurate species identification using specific gene sequencing were used to evaluate the fungal early infection. Considering that in Romania the prevalence of Fusarium graminearum, and Fusarium proliferatum infections is the most important, it can be stated that the screening with primers specific to fungal species ensures a preliminary test for fungal infection identification before performing the test for mycotoxins.
Ransomware risk management :
Authors: Barker William C , Fisher William , Scarfone Karen , Souppaya Murugiah
Published: April 2022

Ransomware is a type of malicious attack where attackers encrypt an organization s data and demand payment to restore access. Attackers may also steal an organization s information and demand an additional payment in return for not disclosing the information to authorities, competitors, or the public. This Ransomware Profile identifies the Cybersecurity Framework Version 1.1 security objectives that support identifying, protecting against, detecting, responding to, and recovering from ransomware events. The profile can be used as a guide to managing the risk of ransomware events. That includes helping to gauge an organization s level of readiness to counter ransomware threats and to deal with the potential consequences of events.
Minimalism and Postmodernism in John Adams' opera Nixon in China
Authors: Ван Дунпин
Published: April 2022

The subject of the study is the opera by composer John Adams "Nixon in China". This opera is written in the style of musical minimalism in the context of postmodern trends. "Nixon in China" is the first documentary opera based on the genre of reportage. On the example of the opera "Nixon in China", the peculiarities of the functioning of the opera genre in the postmodern era are clearly manifested. In "Nixon in China", the culture of performance is combined with the traditions of the bolshoi opera, refracted in the light of the spiritual quest of music of the second half of the XX century. The social problems of the opera conceal a number of philosophical issues related to the fate of the individual and the state. The main conclusions of the study are the provisions on the combination of minimalism, grand opera and postmodernism in "Nixon in China". It is determined that minimalism in the musical language is manifested in the meditativeness of the musical image, the use of patterns of development of musical material enriched with harmonic movement. Postmodernism expressed itself in intertextuality, performance culture, eclecticism and in the peculiarities of the genre nature of opera. The basis for the opera was the genre of news reporting. The vocal characteristics of the heroes have a cross-cutting development in the direction from the external diplomatic appearance to internal experiences, against the background of which philosophical questions are raised about the uncertainty of the fate of the state and the role of the individual in history.
Features of the plastic embodiment of the images of Oberon and Titania in the ballet by J. Neumeier's "A Midsummer Night's Dream"
Authors: Khokhlova Daria
Published: April 2022

In this article, a meaningful interpretation of the plastic solution is carried out by choreographer J. Neumeier created images of Titania and Oberon in order to identify their choreographic features in the context of the ballet "A Midsummer Night's Dream" and the choreographer's work as a whole. In the course of the research, the author applied comparative-historical, ideological-artistic and analytical methods. The theoretical basis of the research was the methods of ballet analysis approved by the historians of the ballet Dobrovolskaya, Krasovskaya, Surits; the methodological basis for the analysis of choreography were the works of ballet master and ballet theorist Lopukhov. In the course of the source analysis, the author used video materials from the archives of the Hamburg "Ballettzentrum" and the Moscow Bolshoi Theater.A detailed analysis of the choreographic score of Titania and Oberon's parts made it possible to identify the following author's solutions related to the new research results. In the first duet of Oberon and Titania, Neumeier forms plastic leitmotifs, which are developed in further appearances of the characters. The choreographer uses emphatically profiled, graphic and carefully geometric positions of the performers' bodies, additionally accentuating this with tight-fitting costumes; the parties receive active choreographic development based on a technically saturated duet dance, replete with high supports with acrobatic elements using extreme flexibility and stretching of the ballerina. So, when setting the analyzed roles, J. Neumeier used qualitatively new, including non-traditional plastic methods, which were significant in the context of his production of A Midsummer Night's Dream and influenced the further formation of the choreographic style of the choreographer.
"Veni Sancte Spiritus" by Alexander Vustin: on the problem of updating the technique of writing on cantus firmus in modern choral composition
Authors: Koshkareva Natalya  Vladimirovna
Published: April 2022

The purpose of this article is to identify a close, "polyphonic" connection, consolidation of ancient forms and techniques of compositional writing of the twentieth century. The subject of the study is the choral creativity of Alexander Vustin. The object of the study is the consideration of polyphonic works of techniques in A. Vustin's composition "Veni Sancte Spiritus". The musical language of A. Vustin is characterized by extreme restraint, depth, semantic concentration. The appeal to ancient polyphonic genres, forms and techniques of writing in A. Vustin's choral compositions is characterized by an individual approach to solving a creative idea. The nature of the presentation of the original source, the methods of working with it acquires uniqueness in accordance with the new artistic tasks of modern music. Through the synthesis of research methods, including musicology, poetics and choral studies, the parameters of a musical composition are revealed: a musical-text source is attributed, genre specifics and musical form are analyzed. The author examines in detail such an aspect of the topic as the dialectical interaction of constructive and destructive formants of the architectonics of the musical form of polyphonic compositions for chorus. Special attention is paid to the ancient technique of writing on the cantus firmus in its refraction in modern choral composition.The main conclusion of the conducted research is the paradigm of artistic connections of genres, forms and techniques of ancient polyphony with modern means of compositional writing (sonorica, aleatorica and others). Attention is focused on the need to study the issues related to the architectonics of modern choral composition, due not only to the general artistic and historical potential of choral culture as a whole, but especially its great importance in modern musical art. The novelty of the research lies in the fact that for the first time polyphonic techniques in modern choral composition are analyzed from the standpoint of musicology and choral studies. A special contribution of the author to the disclosure of the topic is the study of the composition "Veni Sancte Spiritus" by A. Vustin, which has not previously been the object of special research, and its introduction into modern scientific usage.
Dystopia, post-apocalypse and cinematic reading
Authors: Al-Mamori Yasir Khudeir Obid
Published: April 2022

The subject of the study is the study of such a specific genre as dystopia, which is the dominant form of society in post-apocalyptic worlds. The object of the study is dystopia and post-apocalypse in cinema, as well as their features in modern realities. In the course of the research, special attention is paid to the study of the substantive essence of such definitions as "dystopia", "apocalypse" and "post-apocalypse". Special emphasis is placed on the fundamental difference and differences between apocalyptic and post-apocalyptic events. Special attention is also paid to the reasons and factors that cause the return of popularity of dystopian narratives to cinema. In addition, the social, political and philosophical orientation of the genre of dystopia is considered. В В В В  The main conclusions of the study are the conclusion that cinema, thanks to its dynamic audiovisual nature, allows dystopia to reveal its potential as an exciting and entertaining genre, while provoking the viewer to critical reflections and actions. The author's special contribution lies in the fact that during the analysis it was possible to substantiate the statement that the vision of dystopian cinema and, accordingly, the content of films varies depending on events occurring in a certain historical period of time, which allows us to depict various characteristics of the post-apocalyptic world. The scientific novelty of the research consists in conducting a discussion about the historical background of the terms "apocalypse", "post-apocalypse" and "dystopia" within the framework of the new millennium and the events that occurred and influenced the whole world and its perception of a possible end.
The current stage of interaction between the theater schools of Russia and China in the context of the dialogue of cultures
Authors: Veledinsky Oleg Valerievich
Published: April 2022

The article discusses the current topic of international interuniversity exchanges in the field of theater education. The subject of the study is the interaction of theater schools in Russia and China within the framework of the experimental RussianвЂ“Chinese theater and educational project of the Central Academy of Drama (Beijing) and the Russian State Institute of Performing Arts (St. Petersburg). The project has been implemented since 2015. According to the terms of the project, Russian and Chinese teachers of acting and special disciplines work together in St. Petersburg and Beijing. Upon graduation, students receive diplomas from two universities recognized in both countries. The author, a direct participant of the project, analyzes the results of this experiment from the position of compliance with the principles and requirements of the dialogue of cultures. В  The novelty of the research lies in the substantiation of the cultural value, the prospects of the modern version of the interaction of theater schools in Russia and China. The results of the study were the following conclusions: in the implementation of the Russian-Chinese theater and educational project, all the basic conditions are present and fulfilled, which make it possible to determine the events, events and their results that took place within the framework of the project as a full-fledged dialogue of cultures. Today, as never before, there are points of contact and mutual enrichment of the cultures of Russia and China. There are mutually significant cultural ties, dialogue and interaction of cultures. This variant of intercultural interaction is also productive from the point of view of innovation, creating a unique field of cross-cultural experiments.
A generalization of multiple zeta values. Part 1: Recurrent sums
Authors:   Engineering Department, La Sagesse University, El Haddad Roudy
Published: April 2022

Multiple zeta star values have become a central concept in number theory with a wide variety of applications. In this article, we propose a generalization, which we will refer to as recurrent sums, where the reciprocals are replaced by arbitrary sequences. We introduce a toolbox of formulas for the manipulation of such sums. We begin by developing variation formulas that allow the variation of a recurrent sum of order $m$ to be expressed in terms of lower order recurrent sums. We then proceed to derive theorems (which we will call inversion formulas) which show how to interchange the order of summation in a multitude of ways. Later, we introduce a set of new partition identities in order to then prove a reduction theorem which permits the expression of a recurrent sum in terms of a combination of non-recurrent sums. Finally, we use these theorems to derive new results for multiple zeta star values and recurrent sums of powers.
A generalization of multiple zeta values. Part 2: Multiple sums
Authors:   Engineering Department, La Sagesse University, El Haddad Roudy
Published: April 2022

{\bf Abstract:} Multiple zeta values have become of great interest due to their numerous applications in mathematics and physics. In this article, we present a generalization, which we will refer to as multiple sums, where the reciprocals are replaced with arbitrary sequences. We develop formulae to help with manipulating such sums. We develop variation formulae that express the variation of multiple sums in terms of lower order multiple sums. Additionally, we derive a set of partition identities that we use to prove a reduction theorem that expresses multiple sums as a combination of simple sums. We present a variety of applications including applications concerning polynomials and MZVs such as generating functions and expressions for $\zeta(\{2p\}_m)$ and $\zeta^\star(\{2p\}_m)$. Finally, we establish the connection between multiple sums and a type of sums called recurrent sums. By exploiting this connection, we provide additional partition identities for odd and even partitions.
Water stress and nitrogen supply affect floral traits and pollination of the white mustard,Sinapis alba(Brassicaceae)
Authors: Akter Asma , Klečka Jan
Published: April 2022

Changes in environmental conditions are likely to have a complex effect on the growth of plants, their phenology, plant-pollinator interactions, and reproductive success. The current world is facing an ongoing climate change along with other human-induced environmental changes. Most research has focused on the impact of increasing temperature as a major driving force for climate change, but other factors may have important impacts on plant traits and pollination too and these effects may vary from season to season. In addition, it is likely that the effects of multiple environmental factors, such as increasing temperature, water availability, and nitrogen enrichment are not independent. Therefore, we tested the impact of two key factors—water, and nitrogen supply—on plant traits, pollination, and seed production inSinapis alba(Brassicaceae) in three seasons defined as three temperature conditions with two levels of water and nitrogen supply in a factorial design. We collected data on multiple vegetative and floral traits and assessed the response of pollinators in the field. Additionally, we evaluated the effect of growing conditions on seed set in plants exposed to pollinators and in hand-pollinated plants. Our results show that water stress impaired vegetative growth, decreased flower production, and reduced visitation by pollinators and seed set, while high amount of nitrogen increased nectar production under low water availability in plants grown in the spring. Temperature modulated the effect of water and nitrogen availability on vegetative and floral traits and strongly affected flowering phenology and flower production. We demonstrated that changes in water and nitrogen availability alter plant vegetative and floral traits, which impacts flower visitation and consequently plant reproduction. We conclude that ongoing environmental changes such as increasing temperature, altered precipitation regimes and nitrogen enrichment may thus affect plant-pollinator interactions with negative consequences for the reproduction of wild plants and insect-pollinated crops.
How many single-copy orthologous genes from whole genomes reveal deep gastropod relationships?
Authors: Chen Zeyuan , Schrödl Michael
Published: April 2022

The Gastropoda contains 80% of existing mollusks and is the most diverse animal class second only to the Insecta. However, the deep phylogeny of gastropods has been controversial for a long time. Especially the position of Patellogastropoda is a major uncertainty. Morphology and some mitochondria studies concluded that Patellogastropoda is likely to be sister to all other gastropods (Orthogastropoda hypothesis), while transcriptomic and other mitogenomic studies indicated that Patellogastropoda and Vetigastropoda are sister taxa (Psilogastropoda). With the release of high-quality genomes, orthologous genes can be better identified and serve as powerful candidates for phylogenetic analysis. The question is, given the current limitations on the taxon sampling side, how many markers are needed to provide robust results. Here, we identified single-copy orthologous genes (SOGs) from 14 gastropods species with whole genomes available which cover five main gastropod subclasses. We generated different datasets from 395 to 1610 SOGs by allowing species missing in different levels. We constructed gene trees of each SOG, and inferred species trees from different collections of gene trees. We found as the number of SOGs increased, the inferred topology changed from Patellogastropoda being sister to all other gastropods to Patellogastropoda being sister to Vetigastropoda + Neomphalina (Psilogastropoda s.l.), with considerable support. Our study thus rejects the Orthogastropoda concept showing that the selection of the representative species and use of sufficient informative sites greatly influence the analysis of deep gastropod phylogeny.