bluuebunny/crossref_metadata_2025 huggingface dataset:
Quantifying the Impact of COVID-19 on Telemedicine Utilization: Retrospective Observational Study (Preprint)
Authors: Vogt Emily Louise , Welch Brandon M , Bunnell Brian E , Barrera Janelle F , Paige Samantha R , Owens Marisa , Coffey Patricia , Diazgranados Nancy , Goldman David
Published: April 2021

BACKGROUND

While telemedicine has been expanding over the past decade, the COVID-19–related restrictions regarding in-person care have led to unprecedented levels of telemedicine utilization. To the authors’ knowledge, no studies to date have quantitatively analyzed both national and regional trends in telemedicine utilization during the pandemic, both of which have key implications for informing health policy.

OBJECTIVE

This study aimed to investigate how trends in telemedicine utilization changed across the course of the COVID-19 pandemic.

METHODS

Using data from doxy.me, the largest free telemedicine platform, and the NIH (National Institutes of Health) Clinical Center, the largest clinical research hospital in the United States, we assessed changes in total telemedicine minutes, new provider registrations, monthly sessions, and average session length from March to November 2020. We also conducted a state-level analysis of how telemedicine expansion differed by region.

RESULTS

National telemedicine utilization peaked in April 2020 at 291 million minutes and stabilized at 200 to 220 million monthly minutes from May to November 2020. Surges were strongest in New England and weakest in the South and West. Greater telemedicine expansion during the COVID-19 pandemic was geographically associated with fewer COVID-19 cases per capita. The nature of telemedicine visits also changed, as the average monthly visits per provider doubled and the average visit length decreased by 60%.

CONCLUSIONS

The COVID-19 pandemic led to an abrupt and subsequently sustained uptick in telemedicine utilization. Regional and institute-level differences in telemedicine utilization should be further investigated to inform policy and procedures for sustaining meaningful telemedicine use in clinical practice.
Internet-Based Cognitive Behavioral Therapy and its Association With Self-efficacy, Depressive Symptoms, and Physical Activity: Secondary Analysis of a Randomized Controlled Trial in Patients With Cardiovascular Disease (Preprint)
Authors: Johansson Peter , Lundgren Johan , Andersson Gerhard , Svensson Erland , Mourad Ghassan
Published: April 2021

BACKGROUND

In patients with cardiovascular disease (CVD), knowledge about the associations among changes in depressive symptoms, self-efficacy, and self-care activities has been requested. This is because such knowledge can be helpful in the design of behavioral interventions aimed to improve self-efficacy, reduce depressive symptoms, and improve performance of self-care activities in CVD patients.

OBJECTIVE

We aim to evaluate if internet-based cognitive behavioral therapy (iCBT) improves self-efficacy and explore the relationships among changes in depressive symptoms, self-efficacy, and physical activity, as well as the influence of iCBT on these relationships.

METHODS

This study received funding in January 2015. Participant recruitment took place between January 2017 and February 2018, and the main findings were published in 2019. This study is a secondary analysis of data collected in a randomized controlled study evaluating the effects of a 9-week iCBT program compared to an online discussion forum (ODF) on depressive symptoms in patients with CVD (N=144). Data were collected at baseline and at the 9-week follow-up. Analysis of covariance was used to evaluate the differences in self-efficacy between the iCBT and ODF groups. Structural equation modeling explored the relationships among changes in depressive symptoms, self-efficacy, and physical activity, as well as the influence of iCBT on these relationships.

RESULTS

At follow-up, a significant difference in the increase in self-efficacy favoring iCBT was found (P=.04, Cohen d=0.27). We found an indirect association between changes in depressive symptoms and physical activity (β=–.24, P<.01), with the change in self-efficacy acting as a mediator. iCBT had a direct effect on the changes in depressive symptoms, which in turn influenced the changes in self-efficacy (β=.23, P<.001) and physical activity (β=.12, P<.001).

CONCLUSIONS

Self-efficacy was improved by iCBT. However, the influence of iCBT on self-efficacy and physical activity was mostly mediated by improvements in depressive symptoms.

CLINICALTRIAL

ClinicalTrials.gov NCT02778074; https://clinicaltrials.gov/ct2/show/NCT02778074
INCREMENTO DA PROPOSTA DE VALOR ATRAVÉS DO USO DA FERRAMENTA DE CRM NO GERENCIAMENTO DAS RELAÇÕES COM OS CLIENTES EM EMPRESAS EXPORTADORAS
Authors: Baron Bruna Brancher
Published: April 2021

O presente estudo tem como objetivo identificar como é feita a incrementação da proposta de valor a partir da utilização da ferramenta de CRM em empresas exportadoras. Para tanto foi conduzido um levantamento teórico a respeito de ambos os temas, e foram observadas em 5 organizações como são percebidos o valor pelos clientes e como é gerada a relação das empresas com os clientes internacionais. Os resultados indicam que não são todas as empresas que adotam estratégias e ferramentas de gestão de relacionamento com seus clientes. Porém, todas prezam pela melhor relação com os clientes internacionais por meio de ações intrínsecas aos seus processos comerciais cotidianos. Em sua grande maioria, as respostas foram parecidas, mostrando que o bom relacionamento com os clientes e a manutenção dos mesmos – ainda que muitas vezes não se utilize o software de CRM - é sim fundamental para a incrementação da proposta de valor frente ao seu produto e/ou serviço, bem como para o sucesso de uma operação internacional.
Effects of pollinator related information on consumer preference for neonicotinoid labeling
Authors: Khachatryan Hayk , Wei Xuan , Rihn Alicia
Published: April 2021

Despite increasing concerns about the potential negative impacts of neonicotinoid insecticides on pollinator insect health in the regulatory community, public perceptions about the use of such pest management tools are mainly unknown. To assess U.S. consumers’ feedback to information linking neonicotinoid insecticides to pollinator health, the present study investigated consumers’ preferences for different neonicotinoid labels. Specifically, it analyzed the effect of negative and balanced pollinator related information treatments on consumers’ preferences for labels disclosing the absence or presence of neonicotinoids. The effects of the information treatments were asymmetric, with the negative information treatment having a more substantial impact on individual choices. Information treatments were more effective at influencing participants’ willingness to pay (WTP) for labels disclosing the absence of neonicotinoids, as opposed to labels disclosing the presence of neonicotinoids. Preexisting knowledge about neonicotinoid insecticides had a significant impact on how individuals responded to information treatments.
On a conjecture of Seneta on regular variation of truncated moments
Authors: Kevei Péter
Published: April 2021

We prove that h?(x) = ??x0 y??1F?(y)dy is regularly varying with index ? [0, ?) if and only if V?(x) = ?[0,x] y?dF(y) is regularly varying with the
same index, where ? > 0, F(x) is a distribution function of a nonnegative
random variable, and F?(x) = 1?F(x). This contains at ? = 0, ?= 1 a result
of Rogozin [8] on relative stability, and at ? = 0, ? = 2 a new, equivalent
characterization of the domain of attraction of the normal law. For ? = 0
and ? > 0 our result implies a recent conjecture by Seneta [9].
Continued fractions and diophantine equations in positive characteristic
Authors: Ayadi Khalil , Azaza Awatef , Beldi Salah
Published: April 2021

We exhibit explicitly the continued fraction expansion of some algebraic
power series over a finite field. We also discuss some Diophantine equations
on the ring of polynomials, which are intimately related to these power
series.
Plastik Enjeksiyon Kalıplamada Şekil Uyumlu Soğutma Kanalları için Soğutma Sıvısı Akış Stratejilerinin Karşılaştırılması
Authors: GÖKTAŞ Mustafa , GÜLDAŞ Abdulmecit
Published: April 2021

Plastik enjeksiyon kalıplamada üretim hızının artırılması ve ürün kalitesinin iyileştirilmesi amacıyla daha etkin soğutmanın gerçekleştirilebilmesi için şekil uyumlu soğutma kanallarına ihtiyaç duyulmaktadır. Bu çalışmada sistematik bir tasarım metodu ile tasarlanmış spiral, zikzak ve paralel akış hatlarına sahip şekil uyumlu ve düz soğutma kanallarının plastik enjeksiyon kalıplarındaki soğutma etkinlikleri incelenmiştir. Bu amaçla sayısal olarak soğuma ve çarpılma analizleri yapılarak tasarlanan soğutma kanallarının çevrim süresine ve plastik parça üzerindeki çarpılmaya etkileri belirlenmeye çalışılmıştır. Doğrusal kanal yerine şekil uyumlu soğutma kanalı kullanımı ile soğutma süresi %51 ve çarpılma miktarı %25 seviyesine kadar düşüş sağlanmıştır. Şekil uyumlu soğutma kanalları arasında en kısa çevrim süresi spiral formlu kanalda, en düşük çarpılma ise zikzak formlu kanalda elde edilmiştir. Spiral ve doğrusal formlu soğutma kanalına sahip plastik enjeksiyon kalıpları imal edilerek baskı denemeleri yapılmış ve elde edilen deneysel sonuçlar analiz sonuçları ile karşılaştırılmıştır. Sayısal ve deneysel sonuçların birbiri ile uyumlu oldukları görülmüştür.
Effects of Vermiculariser, Inoculant and Copper Addition on Microstructure and Corrosion Properties of Vermicular Graphite Cast Iron
Authors: HASIRCI Hasan , KARACİF Kubilay , KARATAY Berkay
Published: April 2021

In this study, the microstructure and corrosion properties of Vermicular Graphite Cast Iron (VGCI) produced via different methods and parameters were investigated. VGCI was produced from a base ductile iron material using different proportions of vermiculariser and inoculant. Copper was added to a group of samples as an alloying element. The microstructures and corrosion properties of samples were investigated in saltwater media. The effects of production parameters on the microstructure and corrosion behavior were determined. It was observed that as the ratio of vermiculariser applied was increased, the vermicular graphite ratio and vermicularity was also increased. The matrix grain size decreased while the inoculant and pearlite phase ratio increased due to the addition of copper. In electrochemical corrosion studies, VGCI was superior in corrosion resistance compared to SGCI and addition of vermiculariser, inoculants and copper was found effective in improving the corrosion resistance of the VGCI material.
Interpretação de gráficos de barras na educação de jovens e adultos
Authors: Borges Lima Izauriana , Coêlho Vieira Selva Ana
Published: April 2021

Ler e interpretar gráficos constituem habilidades importantes para o letramento estatístico do adulto. Sendo assim, o objetivo deste estudo é analisar os avanços e as dificuldades de estudantes dos anos iniciais do ensino fundamental da educação de jovens e adultos (EJA) na interpretação de gráficos de barras antes e depois de serem submetidos à realização de quatro intervenções pedagógicas distintas. Situados no recorte da pesquisa de doutorado que investigou as relações entre interpretar e construir gráficos de barras, aprofundamos a compreensão das relações entre essas duas atividades e evidenciamos, neste artigo, os resultados encontrados ao se analisar essas tarefas desenvolvidas por estudantes da EJA. O estudo envolveu pré-teste, intervenção e pós-teste. O teste aplicado no pré-teste e no pós-teste foi o mesmo e solicitou a interpretação de gráficos de barras. As quatro intervenções pedagógicas envolveram duas seções de construção (G1), duas seções de interpretação (G2), uma seção de interpretação seguida de construção (G3) e uma seção de construção seguida de interpretação (G4). Os resultados do pós-teste indicaram desempenho significativamente melhor em todos os grupos na leitura dos dados, na leitura entre os dados e na leitura para além dos dados, entretanto, dificuldades nas questões de comparação se mostraram persistentes. Não foram observadas diferenças significativas por grupo de intervenção, contudo, os resultados do G2 foram melhores que os dos demais grupos. Conclui-se que intervir apenas com atividades de interpretação contribuiu para a compreensão de gráficos de maneira mais forte, entretanto, intervir apenas com atividades de construção, articulando interpretação e construção, também favorece o desenvolvimento das habilidades interpretativas em gráficos de barras.
Inclusão escolar e atuação dos Núcleos de Apoio às Pessoas com Necessidades Educacionais Específicas no Instituto Federal de São Paulo
Authors: Ariela Rios Vilaronga Carla , Oliveira da Silva Michele , Momesso Franco Ana Beatriz , Alias Rios Gabriela
Published: April 2021

Os Núcleos de Apoio às Pessoas com Necessidades Educacionais Específicas (NAPNEs) têm sido referência quando se fala da educação do estudante Público-Alvo da Educação Especial (PAEE) no contexto da Rede Profissional Tecnológica e têm realizado diferentes ações também no contexto do Instituto Federal do Estado de São Paulo (IFSP). Fica assim evidente a relevância de estudos voltados ao processo de inclusão dos alunos PAEE nos Institutos Federais (IFs), assim como questões quanto ao planejamento do ensino, acessibilidade e permanência. Diante deste contexto, o objetivo desse trabalho foi mapear e analisar ações desenvolvidas ou vivenciadas pelas equipes dos NAPNEs de diferentes campi do IFSP, tendo como base a proposta de atuação do núcleo da instituição. A pesquisa caracteriza-se como qualitativa, de caráter documental, sendo analisados os conteúdos das revistas “Napne em Ação”, que teve sua primeira edição em 2015, originada pelo relatório das atividades anuais dos campi. Foram também analisados os documentos institucionais que regularizam a atuação dos NAPNEs. As 302 páginas da revista foram tabuladas em informações quantitativas e analisados qualitativamente, organizados em eixos temáticos. Os dados apontam que, analisando o IFSP como todo, foram realizadas ações de ensino, pesquisa e extensão relacionadas ao estudante PAEE, cumprindo-se os objetivos da proposta do Núcleo. Também foram realizadas ações com as diferentes especificidades, com destaque para o estudante surdo, além de ações de formação de servidores. Entende-se, na análise individual de cada campi, que existem ações sendo realizadas e que a proposta de inclusão escolar não está estagnada desde 2014, mas não existem dados para afirmar que os estudantes PAEE do IFSP tenham seu direito de acessibilidade e educação garantidos, sendo esse um limite da pesquisa.
Desafios e reflexões sobre diversidade cultural no contexto da pandemia COVID-19
Authors: Oliveira Maria Aparecida Costa , Nichio Elaine Rodrigues , Santos Gisely Storch do Nascimento , Andrade Fábio Santos de , Pacífico Juracy Machado
Published: April 2021

O estudo teve como objetivo compreender as práticas pedagógicas, envolvendo a diversidade cultural, desenvolvidas por professores e professoras de língua portuguesa durante o período pandêmico provocado pela COVID-19 no ano de 2020. A pesquisa foi  realizada no Instituto Federal de Ciência e Tecnologia de Rondônia, nos Campi de Colorado do Oeste e Vilhena, com 04 (quatro) docentes da disciplina de Língua Portuguesa que atuam no Ensino Médio Integrado. Os instrumentos metodológicos utilizados foram: pesquisa documental, pesquisa bibliográfica e entrevista semiestruturada, ancorados na perspectiva de Candau (2008), Merleau-Ponty (2011) e Freire (1997; 2007). Os resultados apontam a preocupação dos(as) professores(as) em possibilitar uma educação emancipatória e humanizadora por meio de práticas pedagógicas que promovam um diálogo de respeito e valorização do multiculturalismo. Evidenciou-se limitações quanto ao acesso a recursos tecnológicos devido às desigualdades sociais, políticas e econômicas que afetam o nosso país, sendo um grande desafio para a garantia do direito constitucional de acesso à uma educação justa e integradora.
Projecting health promotion speech creative activity of students in modern system of language education
Authors: Ponomareva Lyubov D. , Dorfman Oksana V. , Buzhinskaya Darya S. , Podgorskaya Anna V. , Osipova Aleksandra A. , Gubchevskaya Ekaterina A.
Published: April 2021

Text manipulation suggests active speech production activity of students in comprehending, reproducing and producing texts. The authors of the article have proved the need to use health-saving technology in the process of speech production development of students. It is concluded that projecting health promotion speech creative activity of students contributes to didactic solutions. The possibilities of using health-saving technology in the process of speech production development of students have been considered by means of an example of organizing speech creative project and speech creative work en plein air in high school, and an overall conclusion about the effectiveness of using this technology in the process of teaching Russian language and literature has been made.
Analysis of factors that determine students' preferences in choosing an educational institution
Authors: Levkina Elena V. , Yurchenko Natalya A. , Kim Angelina G.
Published: April 2021

At present, the Primorye Territory is most susceptible to migration outflow, as a result of which it loses school graduates, students, postgraduates and highly qualified specialists. The emigration loss of potential highly professional personnel of a particular territory is not always compensated by their return to this territory. This situation can be regarded as a certain threat to the stability of the territory (region), the possibility of its development. In this regard, in order to develop management solutions to curb "educational migration" and identify motivators for young people, it is necessary to determine the factors that influence the choice of educational institutions. Knowing the "starting points" on the way to choosing a higher education institution among applicants, you can determine the competitive forces of higher education institutions and strengthen them, which will allow you to keep young people from migrating from the Primorye.
Enhancing Productivity of Sweet Marjoram in Substrate Culture
Authors: Emam Mohamed Saad , Hawash A. M. H. , Mohammed M. H. , Metwally Neveen E. , Ahmed S. H. , Maharik Z. Y.
Published: April 2021

Sweet Marjoram is considered as one of the important herbal plants, grown in many countries for medical and nutritional purposes and is an abundant source of valuable biologically active substances and mineral components. An experiment has been carried out on sweet marjoram at the experimental site of Central Laboratory for Agricultural Climate (CLAC), Agriculture Research Center,  Ministry of Agriculutre and land reclamation, Egypt under a net duble span house, during seasons of 2019and 2020. The experiment was carried out to study the effect of different nutrient solution sources and verimicompost rates on production of Sweet Marjoram grown in sand culture. In this experiment, Three sources of nutrient solution were under investigation (chemical nutrient solution “CN. S.” as a control treatment, vermi-liquid “V. L.” and mixture of chemical nutrient solution andvermi-liquid (50%:50%) “CN.S.+V.L.”), also, five rates of vermicompost have been added to sand culture(zero% of vermicompost "V.C. 0%"as a control treatment, 10% Vermicompost "V.C. 10%", 20% Vermicompost "V.C. 20%", 30% Vermicompost "V.C. 30%"and 40% Vermicompost "V.C. 40%").Regarding the effect of nutrient solution source; results illustrated that chemical nutrient solution recorded the highest values for  vegetative growth, yield and chemical measurments. also data clearfied that the mixture of chemical nutrient solution and vermi-liquid (50%:50%) “CN.S.+V.L.” recorded a promising results very close to the chemical nutrient solution and more healther; because the amount of chemicals used in this nutrient solution have been reduced into the half amount only comparison with chemical nutrient solution. For that, the mixture of chemical nutrient solution and vermi-liquid (50%:50%) could be considered as the most suitable nutrient solution for sweet marjoram. Concerning the effect of different vermicompost rates, results showed that adding vermicompost rate by 30% to sand culture recorded the highest values for plant height,  number of branches /plant, Fresh and dry weights of the aerial parts /plant, yields of the fresh and dry herb/ m2, yield of aromatic oil/ m2 (V.C. 40% recorded higher values for yield of the aromatic oil/m2 than V.C. 30% but the difference between both of them was not significant), and N,P,K% in leaves.
SCREENSHOT FACEBOOK SEBAGAI ALAT BUKTI TINDAK PIDANA PENCIPTAAN INFORMASI ELEKTRONIK PALSU
Authors: Putri Clarisa Permata Hariono , Christianto Hwian , Samudra Anton Hendrik
Published: April 2021

Penelitian ini bertujuan untuk mengetahui pembuktian tindak pidana penciptaan informasi elektronik palsu menggunakan screenshot facebook sebagai alat bukti berdasarkan Undang – Undang Informasi dan Transaksi Elektronik dan perubahannya, serta peraturan terkait dengan melihat pada kasus yang ada dalam putusan No. 43/Pid.Sus/2018/PN Mjl. Metode penelitian yang digunakan adalah metode yuridis normatif yaitu suatu metode penelitian yang dilakukan dengan studi kepustakaan. Hasil penelitian ini adalah screenshot facebook tidak cukup untuk dapat digunakan sebagai alat bukti tindak pidana penciptaan informasi elektronik palsu karena masih diragukan keabsahannya secara materiil sebagai alat bukti dan penerapannya sebagai alat bukti masih kurang memenuhi dan membuktikan tiap unsur tindak pidana penciptaan informasi elektronik palsu, sehingga perlu digunakan alat bukti lain dalam mekanisme pembuktian tindak pidana penciptaan informasi elektronik palsu dan perlunya diadakan pengaturan penyitaan atas akun.
Phrourion and coins in central Sicily (6th-3rd Century BCE)
Authors: Lo Monaco Viviana
Published: April 2021

Since its appearance, the minted coin has been an indicator of Greek presence in the Ancient Mediterranean. Despite being a revolutionary notion in the economy of the ancient world, the adoption of the monetary system was not always unanimous, especially among indigenous peoples outside the Hellenic context. This dissension happened because coins, besides the intrinsic value in the metal of which they are made, carry symbolic values intimately linked to the society that produced them. The presence or absence of coins in certain archaeological contexts informs us of their reception among native communities. These objects, accepted by external consumers in adopting them to their everyday life or rituals, were thus also accepted in that they were given new meanings. The case of Sikan phrouria in central Sicily is quite interesting. The circulation of Greek coins was scarce in this territory. Its intensity, however, varied over time, and space. These differences allow us to observe the social changes that occurred in Sikan communities between the 6th and 3rd centuries BCE, as well as to understand coins as active agents in cultural transformation. The contextual material analysis carried out in this paper focuses on the different perceptions of Economy among Greeks and Sikans. The latter showed, in turn, a certain resistance to coins, favouring more traditional forms of exchange.
tragédia da fuga na Eneida
Authors: Freitas Eduardo da Silva de
Published: April 2021

O artigo analisa a construção trágica da fuga de Eneias por Virgílio. Em primeiro lugar, aponta-se que esse não era um tema de encaixe fácil no gênero épico da Antiguidade. Depois, abordam-se algumas maneiras de tratar a tragédia na épica de Virgílio. Por fim, examina-se a fuga de Eneias no livro II da Eneida, observando sua elaboração trágica.
Effects of access to livelihood capitals on adoption of European Union (EU) approved pesticides among cocoa producing households in Osun State, Nigeria
Authors: Kehinde Ayodeji Damilola , Tijani Akeem Abiade
Published: April 2021

Cocoa producing households’ access to livelihood capitals would help them to adopt EU approved pesticides successfully. However, no empirical studies have addressed these issues. This study therefore investigated the effects of access to livelihood capitals on adoption of EU approved pesticides among cocoa producing households. A multi stage sampling procedure was employed to select 120 cocoa producing households for thestudy. The obtained data were analysed using descriptive statistics, multivariate probit regression and double hurdle regression model. The majority of cocoa producing households (92%) have access to natural capital, followed by physical capital (67.5%), social capital (62.5%), financial capital (58%), whereas only afew (50.8%) have access to human capital. Multivariate probit estimates showed that age (p < 0.05), gender (p < 0.05), farm size (p < 0.05), years of education (p < 0.01), farming experience (p < 0.01), household size (p < 0.01) and membership in cooperative society (p < 0.01) significantly influenced cocoa producing households’ access to livelihood capitals. The majority of cocoa producing households (81%) adopt approved pesticides. The first hurdle estimates showed that gender (p < 0.01), education (p < 0.05), membership in acooperative society (p < 0.05) and access to some livelihood capitals such as human (p < 0.01), physical (p < 0.05) and financial (p < 0.01) capitals significantly influence theprobability of adoption of EU approved pesticides. In thesecond hurdle, gender (p < 0.1), farm size (p < 0.01), household size (p < 0.01), membership in acooperative society (p < 0.01)and access to some livelihood capitals such as human (p < 0.05), physical (p < 0.01) and social (p < 0.01) capitals are significant in determining theintensity of adopting EU approved pesticides. The study concluded that access to livelihood capitals has potentials of accelerating adoption of EU approved pesticides. Other factors include gender, education, farm size and membership in acooperative society. Therefore, this study suggests that government policy on uptake of EU approved pesticides should pay more attention on cocoa producing households’ access to all these factors. Most importantly, policy package to encourage access to livelihood capitals must be strongly advocated.
Restructuring of State Enterprises as a Prerequisite for Economic Growth in the Republic of Serbia
Authors: Jakopin Edvard , Gračanac Aleksandar , Aničić Jugoslav
Published: April 2021

This study of the performance of state-owned enterprises in Serbia has shown that the state has great difficulties managing the enterprises that are in its portfolio and under its control. The adaptation of state-owned enterprises to exogenous shocks unfolds at a slow pace and is faced with many problems. The institutional environment for the strategic restructuring of the state sector is not in the service of strengthening the efficiency of its business operation. The study has shown that the economic performance of state-owned enterprises exerts a direct influence on economic growth, the budget, government balance sheets, and debt. While the “healthy” enterprises (the ones conducting their business successfully) are valuable state-owned property, enterprises with a loss or over indebted enterprises are obligations which demand intervention through the injection of additional capital or through other forms of help from the state. The main goal of restructuring state-owned enterprises is to improve responsibility and efficiency. The array of measures for improving efficiency ranges from modifications of the legal framework and corporate governance of socially owned enterprises (including corporatization and separation of activities) to the sale of property to the private sector or complete privatization. Reforms are aimed at improving the transparency and responsibility of state-owned enterprises, not just for the purpose of efficiency, but also for the purpose of harmonization with the ethical and deontological requirements.
Business Model of the Sharing Economy Platform: Who are the “Winners” and who are the “Losers” of the COVID-19 Pandemic?
Authors: Stefanović Suzana
Published: April 2021

The increasing digitalization of business activities in recent years has been a significant impetus to business model innovation. In this sense, we are witnessing the success of companies that base their businesses on the digital platform model. Therefore, the basic purpose of this paper is to stress out the very essence of platformization as a business model, which is based on the implementation of digital technologies, as well as to point out the characteristics - advantages and disadvantages of the so-called “sharing economy” model. Also, the purpose and goal of the paper is to point out how the characteristics of different types of platforms, especially of sharing economy platforms, affect their business success, i.e. market value, but also vulnerability in case of adverse effects of external factors, such as the current corona virus pandemic. Using both the classical methodology of theoretical research, based on insights into an available literature on the topic, and the results of research of world best practice, as well as monitoring statistical indicators of market value of the world’s best companies, the results confirm the initial assumption that nowdays companies which implement business model of the platform prevail. However, the results of the research also showed the vulnerability of the platforms, especially those based on the sharing economy, in the conditions of a corona virus pandemic. Given that there is very little research in the academic literature on the economic consequences of the current COVID-19 pandemic, the originality and significance of the research is in an attempt to stress out the consequences of the pandemic on the current market value and position of platform companies, and also on their survival and growth in the future.
Auditors’ Responsibility in Assessing Going Concern Assumption Affected by Covid-19
Authors: Đorđević Milica , Đukić Tadija
Published: April 2021

The Covid-19 pandemic and the measures introduced to prevent its further spread have undoubtedly led to significant business uncertainties regarding the going concern principle. Not only has the global economy experienced negative effects of the pandemic, but a number of professions as well, including auditing. With their significant responsibility in assessing the going concern, auditors face a number of challenges. The aim of this paper is to point out the need for more extensive consideration of auditors in assessing the going concern, as well as the challenges auditors face in a pandemic and the ways in which they overcome these limitations.
Real Time Enterprise as a Platform of Support Management Systems
Authors: Kisielnicki Jerzy , Markowski Marek Michal
Published: April 2021

The current, fast market changes require enterprises to dynamically adapt the way they conduct their business. This poses many challenges for information technology. Market requirements for immediate response to business changes became the basis of the idea of a real-time information processing (RTE) company. RTE provides real-time information to employees and business partners. Integrated IT systems supporting management constitute a common platform – the foundation of a real-time enterprise. The aim of the article is to present the basic problems of building an IT system that is the basis of a real-time information processing (RTE) company. It is a summary of our work on this type of system. The article justifies the thesis about the need to build a system for the RTE's requirements and the conditions of its implementation. Such a system is designed to provide employees and business partners with the information they need in real time. The use of integrated systems such as ERP, CRM, SCM, and so on provides the ability to implement the main business processes of a real-time enterprise. The article presents both literature analysis and the characteristics of own work on designing IT systems for RTE. Particular attention was paid to the analysis of success factors (determinants) in system design and the use of MUST methodology (MUST is a Danish acronym for theories of and methods for design activities). The final part of the article presents a proposal for further work on IT systems for RTE in the context of existing trends such as DARQ technology (Distributed Ledger, Artificial Intelligence, Extended Reality, Quantum computing).
Research Method for Management of Thermoplastics Production Improvement in Rubber Industry with the Use of 3D Simulation Modeling
Authors: Forrai Sándor , Ludanyi Balázs , Szabó István Péter , Smagowicz Justyna , Szwed Cezary
Published: April 2021

The paper concerns research and improvement of production processes in one of the European companies in the rubber industry

The company did not allow the name or country to be given.

. The main goal is to improve the production process of the thermo-plastics obtained from polymer materials on the company's production line. Improvement is defined as a reduction of the setup time of a key machine in the tested production process. The research method includes the analysis of the literature, observation of the studied process, and the accomplished computer simulation experiments. The proposed activities relate to the reinforcement of the key part of the machine, the change of the machine setup method, and the preliminary staff assignment to the specific tasks. The results of the simulation experiments confirm the implementation of the proposed improvements. The theoretical contribution to the research field development is the proposal of the simulation modeling methodology to improve production processes of continuous materials. Practical conclusions lead to recommendations for the implementation of improvements in the enterprise, with direct application of the proposed actions.
Ring and Field Adjunctions, Algebraic Elements and Minimal Polynomials
Authors: Schwarzweller Christoph
Published: April 2021

In [6], [7] we presented a formalization of Kronecker’s construction of a field extension of a field F in which a given polynomial p ∈ F [X]\F has a root [4], [5], [3]. As a consequence for every field F and every polynomial there exists a field extension E of F in which p splits into linear factors. It is well-known that one gets the smallest such field extension – the splitting field of p – by adjoining the roots of p to F.

In this article we start the Mizar formalization [1], [2] towards splitting fields: we define ring and field adjunctions, algebraic elements and minimal polynomials and prove a number of facts necessary to develop the theory of splitting fields, in particular that for an algebraic element a over F a basis of the vector space F (a) over F is given by a
0
, . . ., an−

1, where n is the degree of the minimal polynomial of a over F .
Analyses of Countermovement Jump Performance in Time and Frequency Domains
Authors: Sha Zhanxin , Zhou Zhaoxian , Dai Boyi
Published: April 2021

This study aimed to analyze counter-movement jump (CMJ) performance in time and frequency domains. Fortyfour Division I American football players participated in the study. Kinetic variables were collected from both dominant and non-dominant legs using two force plates. Normalized peak power, normalized net impulse, and normalized peak force significantly correlated with jump height (r = .960, r = .998, r = .725, respectively with p < .05). The mean frequency component was significantly correlated with CMJ performance (r = .355 with p < .05). The reliability of the frequency variables was higher than the time domain variables. Frequency domain variables showed weaker correlations with jump height compared with time domain variables. Frequency domain analysis provides frequency components, which represent the rate of energy transmission from the eccentric phase to the end of the push-off phase. Frequency component information may provide additional information for the analyses of CMJ performance for athletes.
Acute Effects of Resistance Training with Blood Flow Restriction on Achilles Tendon Thickness
Authors: Picón-Martínez Moisés , Chulvi-Medrano Iván , Cortell-Tormo Juan , Alonso-Aubin Diego , Alakhdar Yasser , Laurentino Gilberto
Published: April 2021

The Achilles tendon is one of the strongest and thickest tendons of the human body. Several studies have reported an immediate decrease in Achilles tendon thickness after a single bout of resistance training. However, the effects of blood flow restriction training on Achilles tendon thickness have not been investigated. The purpose of this study was to investigate the acute effects of different regimens of resistance training on Achilles tendon thickness. Fiftytwo participants (27.3 ± 7 years; 177.6 ± 11 cm; 72.2 ± 13.7 kg) were randomly allocated into one of the three groups: low-intensity exercise without (LI, n = 13) and with blood flow restriction (LI-BFR, n = 24), and high-intensity exercise (HI, n = 15). Participants from LI and LI-BFR groups performed four sets (1 x 30 + 3 x 15 reps) at 30% 1RM, while the HI group performed four sets (1 x 30 with 30% 1RM + 3 x 10 reps with 75% 1RM). All groups performed a plantar flexion exercise. For the LI-BFR group, a blood pressure cuff was placed on the dominant calf and inflated at 30% of the individual´s occlusion pressure (47.6 ± 19.8 mmHg). Sonographic images of Achilles tendon thickness were taken at pre, immediately after, 60 min and 24 h following acute bouts of exercise. Achilles tendon thickness was significantly reduced immediately after, 60 min and 24 h post-LI-BFR exercise (pre: 4.4 ± 0.4 mm vs. IA: 3.8 ± 0.4 mm vs. 60 min: 3.7 ± 0.3 mm vs. 24 h: 4.1 ± 0.3 mm; p < 0.001), whereas Achilles tendon thickness was unchanged for HI and LI groups (p > 0.05). These results suggest that blood flow restriction training may be an effective strategy to stimulate a positive response in Achilles tendon thickness.
Caffeine Produces Neutral Effects on Extraverts’ and Introverts’ Performance of Fundamental Motor Skills
Authors: Carolina Gomes Ana , Tosini Laura , Oliveira Dalton , Lage Guilherme , Franchini Emerson , Meira Jr Cassio
Published: April 2021

Extraverts are active and talkative, while introverts are quiet and calm. This difference has been attributed to the cortical activation level (arousal), which is low in extraverts and high in introverts. Thus, to reach an optimal level of arousal, extraverts seek stimulation and introverts avoid it. As caffeine increases arousal levels, our primary aim was to investigate the effect of caffeine on the performance of extraverted and introverted university students in the execution of stability, manipulative, and locomotor tasks. Considering the above, we evaluated side effects, such as restlessness and trembling of hands, we also analyzed the individual's perception regarding caffeine intake and the placebo. Forty two volunteers were classified as 21 extraverts and 21 introverts by the Eysenck Personality Questionnaire. Participants performed three tasks on two different days, having previously ingested caffeine and a placebo in counterbalanced order. A double-blind technique was employed. The dependent variable was the execution time to perform the tasks. The analyses of variance [2 (extraversion/introversion) x 2 (caffeine x placebo)] for each task did not show significant differences. Regarding the secondary aim, the chi-square test showed that introverts had a better perception of the substance they had ingested than did extraverts. Our findings indicate that in the execution of stability, manipulative, and locomotor tasks, either caffeine or the placebo produced the same effect, regardless of the participants' extraversion score. In addition, introverts were more sensitive to perceive which substance was ingested, caffeine or the placebo, than extraverts.
The Effects of Avoiding Instructions Under Pressure: An Examination of the Volleyball Serving Task
Authors: Gorgulu Recep , Gokcek Eslem
Published: April 2021

Wegner predicts that under pressure self-avoiding instructions not to perform in a certain manner will break down precisely where it is least desired that is the hypothesis of the present study. Specifically, the aim was to test the hypothesis that when instructed not to serve into a certain zone, ironic error would be more prevalent under pressure. Our sample comprised 43 female participants between the age of 13 and 16 (Mage = 14.51, SD = 1.35) who were active volleyball players (Mtraining years = 5.40, SD = 2.38). We measured the participants’ psychophysiological indications of anxiety via the heart rate, heart rate variability as well as the self-reported Mental Readiness Form-3. To measure performance, we counted the number of target and non-target serving zones under different anxiety conditions. Participants scored +5 points for serving into the target zone, scored -5 points for serving to the out or hitting the net and 1 point for serving into the court except the target zone. A 2 (anxiety) × 3 (serving zone) fully repeated measures ANOVA revealed a significant anxiety x serving zone interaction F (2, 84) = 36.52, p < .001. When instructed not to serve in a certain zone, players’ overall performance did not change across anxiety conditions t (42) = .68, p =.50. Results did not provide support for the Wegner’s theory as expected, but instead revealed evidence for the Woodman et al.’s (2015) differentiation of ironic performance error. The results demonstrate that the theory of ironic processes may account for practical instruction-based solution for reducing the susceptibility to ironic errors in the serving type of task in volleyball.
An evaluation of the effectiveness of nudge techniques in improving hygiene behaviours in Kindergartens
Authors: Rozman Natalija , Strah Branka , Jevšnik Mojca
Published: April 2021

Good hygiene practice is an important element in terms of preventing the spread of infections, but it is not always carried out according to instructions among employees in hygienically sensitive work processes. To improve this, tools for nudging hygienic behaviour have been developed, which subconsciously encourage the individual to perform the desired hygienic behaviour. Examples of activity where employees and children constantly come into contact with pathogenic microorganisms are educational institutions (kindergartens). By observing the working process in the selected kindergartens, we wanted to determine the time, technique, and frequency of handwashing among childcare workers and children. In the case of the first ones, we wanted to find out whether they also wear personal protective work equipment. Based on the findings, we wanted to implement the selected nudging tools for better hygiene behaviour. In the first half of the observation, we found that the hygienic behaviour regarding handwashing of childcare workers and children is poor. After setting the nudging tools, hygienic behaviour improved in all the observed groups. The results suggest that the use of nudging tools in kindergartens can significantly contribute to the better implementation of hygienic behaviour (especially handwashing) in childcare workers and children. Consequently, we conclude that with the tools for promoting hygiene behaviour, the incidence of infectious diseases in kindergartens can be reduced. We can direct children towards the healthier and hygienically appropriate way of life by means of the appropriate hygiene behaviour.
Defining Privacy: How Users Interpret Technical Terms in Privacy Policies
Authors: Tang Jenny , Shoemaker Hannah , Lerner Ada , Birrell Eleanor
Published: April 2021

Recent privacy regulations such as GDPR and CCPA have emphasized the need for transparent, understandable privacy policies. This work investigates the role technical terms play in policy transparency. We identify potentially misunderstood technical terms that appear in privacy policies through a survey of current privacy policies and a pilot user study. We then run a user study on Amazon Mechanical Turk to evaluate whether users can accurately define these technical terms, to identify commonly held misconceptions, and to investigate how the use of technical terms affects users’ comfort with privacy policies. We find that technical terms are broadly misunderstood and that particular misconceptions are common. We also find that the use of technical terms affects users’ comfort with various privacy policies and their reported likeliness to accept those policies. We conclude that current use of technical terms in privacy policies poses a challenge to policy transparency and user privacy, and that companies should take steps to mitigate this effect.
Growing synthetic data through differentially-private vine copulas
Authors: Gambs Sébastien , Ladouceur Frédéric , Laurent Antoine , Roy-Gaumond Alexandre
Published: April 2021

In this work, we propose a novel approach for the synthetization of data based on copulas, which are interpretable and robust models, extensively used in the actuarial domain. More precisely, our method COPULA-SHIRLEY is based on the differentially-private training of vine copulas, which are a family of copulas allowing to model and generate data of arbitrary dimensions. The framework of COPULA-SHIRLEY is simple yet flexible, as it can be applied to many types of data while preserving the utility as demonstrated by experiments conducted on real datasets. We also evaluate the protection level of our data synthesis method through a membership inference attack recently proposed in the literature.
Ibrutinib in patients with atrial fibrillation – the challenge of thromboembolic prophylaxis
Authors: Ciuculete Denisa-Corina , Popescu Raluca Alexandra , Dan Gheorghe-Andrei
Published: April 2021

Ibrutinib is a novel drug used in haematological malignancies. Its use is associated with an increased risk of atrial fibrillation (AF), which, in turn, exposes patients to embolic risk, including stroke. Reducing this risk requires anticoagulant therapy which is a matter of concern in the context of the increased bleeding risk of patients with haematological malignancies. In this context the presence of thrombocytopenia related to haematological disorder, ibrutinib-anticoagulants and ibrutinib-platelets interactions contribute to the amplification of the problem. The correct assessment of the thrombosis vs. haemorrhage balance represents a significant challenge for the clinician.

In this paper we discuss practical issues related to anticoagulation in patients treated with ibrutinib and incident AF.