bluuebunny/crossref_metadata_2025 huggingface dataset:
Mapas Auto-Organizáveis Aplicado à Análise de Poluentes Atmosféricos na Cidade de Salvador, Bahia
Authors: Costa Emanoel L. R. , Braga Taiane , Albuquerque Edler L. , Fernandes Marcelo A. C.
Published: October 2021

Este trabalho tem como objetivo aplicar uma nova abordagem para a análise de dados de poluentes atmosféricos através de uma técnica aprendizagem de máquina. A técnica é baseada em uma rede neural artificial não supervisionada do tipo mapas auto-organizáveis. A análise foi realizada na cidade de Salvador – Bahia em uma única estação de monitoramento da qualidade do ar localizada no bairro Itaigara, com base em dados medidos durante os anos de 2011 a 2016 e disponibilizados pelo Governo do Estado da Bahia por meio da empresa CETREL S. A.. A partir dos resultados obtidos pela aplicação dos mapas auto-organizáveis foi possível realizar uma análise exploratória sobre os dados, evidenciando correlações entre poluentes e dados meteorológicos, agrupamentos de dados, possíveis fontes de emissão e conclusões sobre o problema.
An approach using Artificial Neural Network and Genetic Algorithm for Day Trade Portfolio Selection
Authors: Campigotto Paula , Alves Junior Omir Correia
Published: October 2021

In the financial market there are several types of investors, from the most conservative to the most daring, who are subject to greater risks in the expectation of greater returns on their investments. However, the concept of risk, in investment portfolios, makes it possible to measure it in different ways. This paper aims to present a method created to select portfolios for Day Trade financial investments using different metric risks, such as CVaR, EWMA and GARCH, and the ensemble of Genetic Algorithm NSGA-II and LSTM Artificial Neural Network, comparing it’s selected portfolios’ performance with another method which uses only NSGA-II and Buy and Hold financial strategy. The results show that the proposed method, with LSTM ANN achieved better returns in the year of 2019.
How Much do the Environmental Conditions Interfere with the Essential Oils of Eugenia spp. L. (Myrtaceae)?
Authors: Silveira Raisa , Carvalho Ana , Bünger Mariana , Gomes Manuella , da Costa Itayguara
Published: October 2021

Eugenia is the largest neotropical genus in the Myrtaceae family. The genus has a wide geographical distribution, occurring from Mexico to Argentina. Eugenia species are rich in essential oils. Essential oils have applications in perfumery, cosmetics, food, pesticides and medicines. Several factors can influence the chemical composition and yield of essential oils, such as extraction technique, season of the year, genetic variations and environmental conditions. The understanding of how much each of these factors interferes in the formation of essential oils can contribute both to the development of more efficient production processes and to the ecological knowledge of the species of the genus. This study aimed to assess the influence of environmental variables on the chemical composition of essential oils from Eugenia species. The method used was to carry out chemometrics analyzes (regression analysis, factor analysis and multivariate analysis of variance) to explain the influence of environmental factors on the chemical composition of essential oils. The estimated regression model was significant (p-value < 0.05). Environmental variables analyzed significantly influenced and account for 11.5% of the variation observed in the chemical composition of essential oils. Phytochemical pattern of essential oil composition was also significantly different among Eugenia species.
Os que ficam : comunidade portuguesa em Antuérpia, 1596 – 1606
Authors: Oliveira Maria Amélia
Published: October 2021

This paper examines the presence of the Portuguese community in Antwerp, after the conquest of the city by the troops of Philip II and the embargo imposed on trade with the United Provinces of the Netherlands. From 1585 onwards, there is an increase in the migration of merchants to neighbouring cities, such as Amsterdam. In general, Portuguese historiography has payed particular attention to the Portuguese who leave Antwerp for new mercantile centres, and to their contribution to business in these new places. However, Antwerp retained some weight as a financial market, and several Portuguese merchants remained in the city. The chronology under study comprises two time slots: 1596 and 1606. The results of the analysis reveal that in this period there is an adaptation of their commercial practices, with new business opportunities. In Antwerp, we see how the Portuguese and Castilian empires intersect, and the way Portuguese merchants benefit from it. Based on information from notarial acts such as powers of attorney, bills of exchange, settlement briefs and wills, this work identifies merchants, their business partners, transit and trading places, different kinds of economic activities they carry out, but also whom they marry, their heirs, how their family ties are woven. The result is a socio-economic profile of the Portuguese community in Antwerp around the turn of the 16th century.
“Unexpected” Infections in Revision Arthroplasty for Aseptic Loosening
Authors: Nikolaev Nikolay S. , Pchelova Nadezhda N. , Preobrazhenskaya Elena V. , Nazarova Valentina V. , Dobrovol’skaya Natal’ya Yu.
Published: October 2021

Background. Data from the national registers of arthroplasty showed that about 12% of hip and knee arthroplasty undergo revision within 10 years after the primary surgery. The leading cause of hip revisions is aseptic loosening of components, knee joint periprosthetic infection (PPI). Some of the infectious complications, including those related to mechanical causes, remain out of sight. The aim of the study was to identify the frequency of unexpected infections during revision knee and hip arthroplasty performed for aseptic complications of any etiology. Materials and Methods. 839 cases of revision arthroplasty of knee and hip joints were analyzed, including 485 aseptic revisions in 450 patients. Clinical, X-ray, laboratory (complete blood count and comprehensive metabolic panel, coagulation panel) methods, synovial fluid analysis and microbiological examination of punctures, including intraoperative ones, were used. The ICM and EBJIS (European Bone and Joint Infections Society) consensus recommendations were used as criteria for assessing the presence of infection. Results. The average age of patients at the time of the revision was 61.7 years. The hip joint prevailed (59.4%), knee joint 40.6%. The growth of microorganisms in the intraoperative biomaterial was detected in 2.08% of observations: in 10 out of 287 patients after aseptic revision of the hip joints and in none of the 198 revisions of the knee joints. In 8 out of 10 cases, the causative agents were coagulase-negative staphylococci, including 6 MRSE; in two cases, anaerobic bacteria. All revisions were carried out by a one-stage method. Patients with detected PPI underwent systemic antibacterial therapy. At the stage of catamnesis, reinfection was assumed in one of the 10 identified cases of PPI, the patient did not show up for revision. In control 63% of the group of the other (aseptic) 470 patients, PPI developed in 4 cases, two-stage revisions were carried out. Conclusions. The frequency of infections accidentally detected during aseptic revisions of large joints was 2.08%. Three-time examination of joint punctures, including intraoperative, provides additional opportunities for the diagnosis of PPI during aseptic revision, and also allows you to choose the optimal stage of revision treatment. The experience gained makes it possible in certain cases to perform one-stage revision in the treatment of PPI.
Treatment of Proximal Femoral Fractures in Patients with COVID-19
Authors: Egorov Konstantin S. , Strizheletsky Valery V. , Ivanov Igor G. , Neverov Valentin A. , Siverskaya Natalia V. , Besaev Alan G.
Published: October 2021

Background. In relation with the COVID-19 new coronavirus infection epidemic that began in Russia in the spring of 2020, a completely new group of patients appeared: patients whose coronavirus infection was combined with the proximal femur fractures. In the course of practical work, hospital doctors had to gain experience in treating these complex patients, solve new organizational and medical tasks. The aim of the study was to evaluate the results of treatment of patients with the proximal femur fractures in combination with coronavirus infection in a covid hospital at the hospital stage, 30-day and 6-month terms. Materials and Methods. The retrospective study is based on the collection and generalization of data from 64 patients with the proximal femur fractures in combination with confirmed coronavirus infection who underwent inpatient treatment from 16.03.2020 to 31.05.2021. 38 (59.4%) patients had a femoral neck fracture, 26 (40.6%) had a fracture of the trochanter region. Forty (62.5%) patients underwent surgical treatment (hip replacement was performed in 23 cases, osteosynthesis was performed in 17 cases), 24 (37.5%) patients did not undergo surgery. Results. With conservative treatment, the hospital mortality rate was 41.6%, the 30-day mortality rate was 72.7%, and the 6 month mortality rate was 95.5%. During surgical treatment, the hospital mortality rate was 5.0% (2 patients died). Early postoperative complications were detected in 5 (12.5%) patients. Thirty-one (77.5%) patients walked or stood with a walker on their own at the time of discharge; 7 (17.5%) patients could not be activated. The thirty-day mortality rate in the group of patients who underwent surgical treatment was 8.6%, and the 6-month mortality rate was 32.1%. Conclusion. Surgical treatment of patients with the proximal femur fractures in combination with coronavirus infection is much more difficult than the treatment of patients without infectious pathology. However, despite number of unresolved problems, surgical treatment of such patients is possible with good results and should be actively applied.
Evaluación comparativa de fincas productoras de arveja en transición agroecológica de Nariño (Colombia)
Authors: Álvarez Sánchez David Eduardo , Gómez López Eyder Daniel , López Rivera Laura Mercedes , Castro Figueroa Jorge Enrique
Published: October 2021

A pesar del predominio que tiene el enfoque de agricultura convencional para la producción de arveja en la vereda Candagán del municipio de Santacruz, en el departamento de Nariño, durante cinco años se ha consolidado una experiencia de transición agroecológica que busca una forma diferente de relación socioambiental. Por la importancia que tiene este tipo de propuestas para la agricultura, se desarrolló una evaluación comparativa de fincas productoras de arveja convencionales y en transición agroecológica de Nariño. Para esto, se describieron las prácticas de innovación campesinas asociadas al cultivo y se estimó la sustentabilidad a partir de 26 indicadores que permitieron identificar los Puntos Críticos de Sustentabilidad (PCS) y el Índice General de Sustentabilidad. Los resultados establecieron diferencias en las características sociales, ambientales, económicas y técnico-productivas de los dos enfoques. Además, para Candagán se identificaron dos PCS que pueden dificultar la consolidación agroecológica. En este estudio se muestran algunas estrategias desarrolladas por los campesinos que podrían integrarse en el diseño de fincas productoras de arveja sustentables.
The Spread of COVID-19 Crisis Communication by German Public Authorities and Experts on Twitter: Quantitative Content Analysis
Authors: Drescher Larissa S , Roosen Jutta , Aue Katja , Dressel Kerstin , Schär Wiebke , Götz Anne
Published: October 2021

Background

The COVID-19 pandemic led to the necessity of immediate crisis communication by public health authorities. In Germany, as in many other countries, people choose social media, including Twitter, to obtain real-time information and understanding of the pandemic and its consequences. Next to authorities, experts such as virologists and science communicators were very prominent at the beginning of German Twitter COVID-19 crisis communication.

Objective

The aim of this study was to detect similarities and differences between public authorities and individual experts in COVID-19 crisis communication on Twitter during the first year of the pandemic.

Methods

Descriptive analysis and quantitative content analysis were carried out on 8251 original tweets posted from January 1, 2020, to January 15, 2021. COVID-19–related tweets of 21 authorities and 18 experts were categorized into structural, content, and style components. Negative binomial regressions were performed to evaluate tweet spread measured by the retweet and like counts of COVID-19–related tweets.

Results

Descriptive statistics revealed that authorities and experts increasingly tweeted about COVID-19 over the period under study. Two experts and one authority were responsible for 70.26% (544,418/774,865) of all retweets, thus representing COVID-19 influencers. Altogether, COVID-19 tweets by experts reached a 7-fold higher rate of retweeting (t8,249=26.94, P<.001) and 13.9 times the like rate (t8,249=31.27, P<.001) compared with those of authorities. Tweets by authorities were much more designed than those by experts, with more structural and content components; for example, 91.99% (4997/5432) of tweets by authorities used hashtags in contrast to only 19.01% (536/2819) of experts’ COVID-19 tweets. Multivariate analysis revealed that such structural elements reduce the spread of the tweets, and the incidence rate of retweets for authorities’ tweets using hashtags was approximately 0.64 that of tweets without hashtags (Z=–6.92, P<.001). For experts, the effect of hashtags on retweets was insignificant (Z=1.56, P=.12).

Conclusions

Twitter data are a powerful information source and suitable for crisis communication in Germany. COVID-19 tweet activity mirrors the development of COVID-19 cases in Germany. Twitter users retweet and like communications regarding COVID-19 by experts more than those delivered by authorities. Tweets have higher coverage for both authorities and experts when they are plain and for authorities when they directly address people. For authorities, it appears that it was difficult to win recognition during COVID-19. For all stakeholders studied, the association between number of followers and number of retweets was highly significantly positive (authorities Z=28.74, P<.001; experts Z=25.99, P<.001). Updated standards might be required for successful crisis communication by authorities.
Impact of the World Inflammatory Bowel Disease Day and Crohn’s and Colitis Awareness Week on Population Interest Between 2016 and 2020: Google Trends Analysis
Authors: Silangcruz Krixie , Nishimura Yoshito , Czech Torrey , Kimura Nobuhiko , Hagiya Hideharu , Koyama Toshihiro , Otsuka Fumio
Published: October 2021

Background

More than 6 million people are affected by inflammatory bowel disease (IBD) globally. The World IBD Day (WID, May 19) and Crohn’s and Colitis Awareness Week (CCAW, December 1-7) occur yearly as national health observances to raise public awareness of IBD, but their effects are unclear.

Objective

The aim of this study was to analyze the relationship between WID or CCAW and the public health awareness on IBD represented by the Google search engine query data.

Methods

This study evaluates the impact of WID and CCAW on the public awareness of IBD in the United States and worldwide from 2016 to 2020 by using the relative search volume of “IBD,” “ulcerative colitis,” and “Crohn’s disease” in Google Trends. To identify significant time points of trend changes (joinpoints), we performed joinpoint regression analysis.

Results

No joinpoints were noted around the time of WID or CCAW during the study period in the search results of the United States. Worldwide, joinpoints were noted around WID in 2020 with the search for “IBD” and around CCAW in 2017 and 2019 with the search for “ulcerative colitis.” However, the extents of trend changes were modest without statistically significant increases.

Conclusions

These results posed a question that WID and CCAW might not have worked as expected to raise public awareness of IBD. Additional studies are needed to precisely estimate the impact of health observances to raise the awareness of IBD.
Professional Care Experiences of Persons With Suicidal Ideation and Behavior: Model Development Based on a Qualitative Meta-Synthesis (Preprint)
Authors: Hechinger Mareike , Fringer André
Published: October 2021

BACKGROUND

Health care professionals (HCPs) are challenged in caring for persons with suicidal ideation or behavior. For affected persons, professional care is essential, and being interviewed about their experiences can be stressful. The experiences of persons ideating or attempting suicide are essential to designing eHealth products to support them in crises and provide continuous care.

OBJECTIVE

This study aimed to synthesize published qualitative research about how persons with suicidal thoughts or behavior experience inpatient or outpatient care. A model will be derived from the meta-synthesis to guide HCPs in their work with affected persons and provide a thorough needs assessment for eHealth development.

METHODS

A qualitative meta-synthesis was conducted using an inductive approach, as proposed by Sandelowski and Barroso. The inclusion criteria were studies in English and German that dealt with persons who ideated or attempted suicide. Relevant articles were identified by searching the PubMed and Cinahl databases and by hand searching relevant journals and reference lists. The findings of each study were analyzed using initial and axial coding, followed by selective coding. Finally, a conceptual model was derived.

RESULTS

In total, 3170 articles were identified in the systematic literature search. Articles were screened independently by 2 researchers based on the eligibility criteria. Finally, 12 studies were included. The central phenomenon observed among persons ideating or attempting suicide is their process from feeling unanchored to feeling anchored in life again. During inpatient and outpatient care, they experience being dependent on the skills and attitudes of HCPs. While helpful skills and attitudes support persons ideating or attempting suicide to reach their feeling of being anchored in life again, adverse interactions are experienced negatively and might lead to prolonging or maintaining the feeling of being unanchored in life.

CONCLUSIONS

The study promotes a differentiated view of the experiences of persons ideating or attempting suicide. The derived conceptual model can guide HCPs in their work with affected persons to support affected persons during their recovery. Moreover, the conceptual model is useable as a springboard to develop eHealth solutions for crisis situations and long-term care.
Applications of Blockchain in the Medical Field: Narrative Review (Preprint)
Authors: Xie Yi , Zhang Jiayao , Wang Honglin , Liu Pengran , Liu Songxiang , Huo Tongtong , Duan Yu-Yu , Dong Zhe , Lu Lin , Ye Zhewei
Published: October 2021

BACKGROUND

As a distributed technology, blockchain has attracted increasing attention from stakeholders in the medical industry. Although previous studies have analyzed blockchain applications from the perspectives of technology, business, or patient care, few studies have focused on actual use-case scenarios of blockchain in health care. In particular, the outbreak of COVID-19 has led to some new ideas for the application of blockchain in medical practice.

OBJECTIVE

This paper aims to provide a systematic review of the current and projected uses of blockchain technology in health care, as well as directions for future research. In addition to the framework structure of blockchain and application scenarios, its integration with other emerging technologies in health care is discussed.

METHODS

We searched databases such as PubMed, EMBASE, Scopus, IEEE, and Springer using a combination of terms related to blockchain and health care. Potentially relevant papers were then compared to determine their relevance and reviewed independently for inclusion. Through a literature review, we summarize the key medical scenarios using blockchain technology.

RESULTS

We found a total of 1647 relevant studies, 60 of which were unique studies that were included in this review. These studies report a variety of uses for blockchain and their emphasis differs. According to the different technical characteristics and application scenarios of blockchain, we summarize some medical scenarios closely related to blockchain from the perspective of technical classification. Moreover, potential challenges are mentioned, including the confidentiality of privacy, the efficiency of the system, security issues, and regulatory policy.

CONCLUSIONS

Blockchain technology can improve health care services in a decentralized, tamper-proof, transparent, and secure manner. With the development of this technology and its integration with other emerging technologies, blockchain has the potential to offer long-term benefits. Not only can it be a mechanism to secure electronic health records, but blockchain also provides a powerful tool that can empower users to control their own health data, enabling a foolproof health data history and establishing medical responsibility.
Identification of a Novel c.3080delC JAG1 Gene Mutation Associated With Alagille Syndrome: Whole Exome Sequencing (Preprint)
Authors: Panwar Deepak , Lal Vandana , Thatai Atul
Published: October 2021

BACKGROUND

Alagille syndrome is an autosomal dominant disorder associated with variable clinical phenotypic features including cholestasis, congenital heart defects, vertebral defects, and dysmorphic facies.

OBJECTIVE

Whole exome sequencing (WES) has become technically feasible due to the recent advances in next-generation sequencing technologies, therefore offering new possibilities for mutations or genes identification.

METHODS

WES was used to identify pathogenic variants, which may have significant prognostic implications for patients’ clinical presentation of the proband. In this paper, we have uncovered a novel JAGGED1 gene (JAG1) mutation associated with Alagille syndrome in a 5-year-old girl presented with conjugated hyperbilirubinemia and infantile cholestasis.

RESULTS

The exome sequencing analysis revealed the presence of a novel JAG1 heterozygous c.3080delC variant in exon 25. The detected variant introduced a stop codon (p.P1027RfsTer9) in the gene sequence, encoding a truncated protein. Our exome observations were confirmed through Sanger sequencing as well.

CONCLUSIONS

Here, we report a case of a patient diagnosed with Alagille syndrome, conjugated hyperbilirubinemia, and infantile cholestasis, with emphasis on its association with the detection of the novel JAG1 mutation, thereby establishing the genetic diagnosis of the disease.
Recognition and Analysis of the Drivers and Key Factors Affecting Exposure Households with Catastrophic and Impoverishing Health Expenditure in Iran with the Futures Study Approach Protocol (Preprint)
Authors: Hedayati Maryam , Masoudi Asl Iravan , Maleki Mohammad Reza , Goharinezhad Salime , Fazaeli Ali Akbar
Published: October 2021

BACKGROUND

Health expenditure is a vital issue for policymakers not as it were due to the health outcome significance, but moreover since of the gradual total health expenditure rises that has ended up a major concern. To survey the financial related burden due to out-of-pocket payments, two commonly elite approaches have been utilized: catastrophic and impoverishing health expenditures. Catastrophic healthcare expenditures and impoverishment both can prevent individuals from accessing effective healthcare services. In Iran, the high out-of-pocket and increase in the share of the population experiencing catastrophic healthcare expenditures and poor financial protection of households against catastrophic healthcare expenditures are among the major public health concerns. To identify the drivers, key factors, and the trends of catastrophic and impoverishing healthcare expenditures among Iranian households, this study will be conducted by futures studies approach.

OBJECTIVE

- To identify the key drivers affecting the future of catastrophic and impoverishing healthcare expenditure in Iran.
- To assess the trend in the incidence and intensity of CHE in Iran.
- To categorize the key drivers
- To prioritize main promoter factors in terms of importance, effectiveness and lack of uncertainty.

METHODS

This study will conduct in four steps. The drivers of the future of Exposure Households with Catastrophic and Impoverishing Health Expenditure will be listed by analyzing the results of a scoping review and then semi-structured interviews with health financial experts.
Afterward, key drivers will be categorized using Porter's five forces (social, technical, economic, environmental, and political) for the macro environment and prioritized using the Fuzzy Analytical Hierarchy Process (FAHP) formulated in excel software.
Further, cross-impact analysis of promoter factors and analytic hierarchy process will be used to determine main promoter factors in terms of importance, effectiveness, and lack of uncertainty.

RESULTS

We anticipate that the results of this protocol study will provide a comprehensive overview of the evidence on the determinants of unfairness and payments that expose the Iranian households to catastrophic and impoverishing health care expenditures and identify research gaps.

CONCLUSIONS

In our study, we will examine the rates of catastrophic health expenditure and impoverishment from medical expenses and its drivers in Iran. This will provide insight into the level of financial protection that a healthcare financing system provides for its citizens. It reflects the financial burden shouldered by families and the financial barriers that reduce their access to health care.
Traditional-versus Online videoconferencing with smartphone application support
Cognitive Behavioral Therapy for Depression:
A retrospective cohort study (Preprint)
Authors: van Dijke Annemiek , Emmory-Lijde Gisela R.M. , Deen Mathijs
Published: October 2021

BACKGROUND

Background: The prevalence of major depression is very high and it is considered one of the most hindering disorders, associated with a strong social- and financial impact. Despite the effectiveness of traditional cognitive behavioral therapy (CBT), response, improvement, remission and recovery rates are low and relapse percentages are considerably high. This study is the first to investigate the effectiveness of online videoconferencing CBT with smartphone app support in patients with major depression. With this ‘modern’ way of online CBT, we aim to enhance the effectiveness of CBT

OBJECTIVE

Objective:
The objective is to assess the results of online videoconferencing CBT with app-support compared to TAU in patients with depression. To enhance therapy outcome and patient satisfaction for the treatment of depression.

METHODS

Methods: A retrospective cohort study was conducted in an outpatient treatment center (PsyQ-Parnassia, the Netherlands). Routine Outcome Monitoring (ROM) data was collected from September 2018 to March 2020, at pre- and post-treatment. Seven hundred and seventy patients were included; 40 for psyQ-online and 730 for psyQ-TAU. The primary outcome measure is the symptoms of depression measured with the Quick Inventory of Depressive Symptomatology (QIDS-SR-16; Trivedi et al., 2004). To assess ‘significant change’ in depressive symptoms we compared pre-and post-treatment scores for PsyQ-online group compared with the PsyQ-TAU group. Clinical significant change or remission was defined as ‘going from above the clinical cut-off score at pre-treatment to below the cut-off score’ which equals ‘normalcy’ or ‘no depression’ (in this case below 6) at post-treatment. ‘Reliable change’ was defined as ‘whether people changed sufficiently that the change is unlikely to be due to simple measurement unreliability’. Reliable changes were grouped in four categories: (1) Recovered = reliable and clinical significant change in QIDS-SR-16, (2) Improved = reliable change, without clinical significant change, (3) No change = no reliable change and no clinical significant change, and (4) Deteriorated = negative reliable change in the QIDS-SR-16 (Jakobsen et al., 2017). To investigate patients satisfaction for online psychotherapy when compared to the patients in the PsyQ-TAU group, we used KLANT scores (Huijbrechts et al., 2009).

RESULTS

Results: The psyQ-online patients showed significantly higher improvement, remission and recovery percentages compared to the psyQ-TAU patients. Online patients were more satisfied with their therapy compared to TAU patients.

CONCLUSIONS

Conclusion: ‘Significant reduction’ in depressive symptoms and high percentages of ‘improvement’, ‘remission’ and ‘recovery’, can be obtained when performing online cbt with smartphone-application-support for depression. This even enhances CBT-outcome in highly satisfied patients.

CLINICALTRIAL

n/a
Challenges in Online Teaching Management in Vietnam Universities
Authors: Thi Pham Thuy-Phuong
Published: October 2021

In Vietnam today, online teaching is still in the development stage. There has not been a set of quality assurance standards for universities to organize online education. Universities that apply online teaching are mainly based on the ability to use information technology. The resources of each university are at a different level and limited while receiving no government investment. Furthermore, the implementation of online teaching requires a significant and methodical investment in technology infrastructure, training content, human resources, and implementation. Therefore, there is a need for online teaching management solutions in universities.
Monetary Policy’s Regulation and Control of Housing Prices under the Novel Coronavirus Pneumonia Epidemic
Authors: Changdong Ta , Yuanying Jiang
Published: October 2021

In recent years, the downward pressure and uncertain factors of my country’s economic development have gradually increased, especially due to the greater impact of the novel coronavirus pneumonia epidemic in early 2020, it is necessary to adjust the monetary policy to make the economy operate stably. Monetary policy is the main means of controlling housing prices, so this article uses the sample data of my country from January 2011 to September 2020, and uses the time-varying parameter vector autoregressive (TVP-SV-VAR) model under the background of economic policy uncertainty (EPU) for the first time to analyze the price-based and quantitative monetary policies are very necessary to regulate and control housing prices. The study found that the increase in economic policy uncertainty will weaken the regulatory role of quantitative monetary policy but will strengthen the regulatory role of price-based monetary policy; the current economic policy uncertainty has increased, especially since the outbreak of the novel coronavirus pneumonia, the quantitative monetary policy is unstable, and the price-based monetary policy is the best choice for controlling housing prices.
DECOLONIZAÇÃO DOS CURRÍCULOS
Authors: SANCHES MUBARAC SOBRINHO ROBERTO , Simone Duarte de Souza Ádria , Aparecida Bettiol Célia
Published: October 2021

Este artigo caracteriza-se como um ensaio teórico com foco no conceito de currículo decolonial e investiga as relações que essa proposição traz para pensar a produção curricular junto à escola indígena. Os debates na literatura educacional articulam-se a partir das diferentes significações de currículo. Para isso, recorremos a um método de análise conceitual, originalmente proposto por Coombs e Daniels (1991), que possibilita investigar um conceito em um conjunto de textos. Por meio dessa metodologia busca-se desdobrar o conceito de currículo decolonial, procedendo a partir de uma leitura interpretativa da noção de currículo. Num primeiro momento o texto aborda o conceito de currículo, a partir de um conjunto delimitado de perspectivas teóricas encontradas na literatura educacional da área. No segundo momento, o texto dirige-se as discussões sobre currículo decolonial. Por fim, apresentamos as considerações sobre currículo numa perspectiva da qual discutimos e refletimos o conceito de escola indígena a partir das experiências de formação de Professores Indígena no estado do Amazonas.
An Improved Proportional Fair Scheduling Algorithm for Downlink LTE Cellular Network
Authors: Ezeribe Basil
Published: October 2021

Abstract: Network providers of LTE networks can achieve maximum gain and Quality of Service (QoS) requirement of their users by employing a radio resource management technique that has the ability to allocate resource blocks to users in a fair manner without compromising the capacity of the network. This implies that for a better performing LTE network, a fair scheduling and balanced QoS delivery for various forms of traffic are needed. In this paper an improved proportional fair scheduling algorithm for downlink LTE cellular network has been developed. This algorithm was implemented using a MATLAB-based System Level simulator by Vienna University. The developed algorithm was compared to other scheduling algorithms such as the Proportional Fair (PF) algorithm, Best Channel Quality Indicator (CQI), and Round Robin (RR) scheduling methods. The system performance was also analyzed under different scenarios using different performance metrics. The achieved results showed that the developed algorithm had a better throughput performance than the Round Robin and Proportional fair scheduling. The developed algorithm shows improved cell edge throughputs of about 19.2% (as at 20 users) and 9.1% higher for cell edge users without and with mobility impact respectively. The Best CQI algorithm had higher peak throughput values but the fairness was highly compromised. The developed algorithm outperforms the Best CQI by 136.6% without the impact of mobility. Finally, in dense conditions, the developed algorithm still outperforms the other algorithms with a QoS metric of 4.6% increment when compared to the PF algorithm which was the closest competitor. Keywords: UE, eNodeB, Scheduling, Proportional Fair, LTE,
A Systematic Study on Sentiment Analysis based on Text Mining and Deep learning for Predictions in Stock Market Trends Through Social and News Media Data
Authors: Jain Suvigya
Published: October 2021

Abstract: Stock Market has always been one of the most active fields of research, many companies and organizations have focused their research in trying to find better ways to predict market trends. The stock market has been the instrument to measure the performance of a company and many have tried to develop methods that reduce risk for the investors. Since, the implementation of concepts like Deep Learning and Natural Language Processing has been made possible due to modern computing there has been a revolution in forecasting market trends. Also, the democratization of knowledge related to companies made possible due to the internet has provided the stake holders a means to learn about assets they choose to invest in through news media and social media also stock trading has become easier due to apps like robin hood etc. Every company now a days has some kind of social media presence or is usually reported by news media. This presence can lead to the growth of the companies by creating positive sentiment and also many losses by creating negative sentiments due to some public events. Our goal in this paper is to study the influence of news media and social media on market trends using sentiment analysis. Keywords: Deep Learning, Natural Language Processing, Stock Market, Sentiment analysis
O impacto da Pandemia do COVID-19 nos Indicadores Econômico-Financeiros e Retorno das Ações no setor de hotelaria: estudo de caso na Rede de Hotéis Othon S.A.
Authors: Cardoso Rafaela Correia , Tristão Pâmela Amado
Published: October 2021

This paper aimed to identify the behavior of economic and financial indicators, as well as share return indicators of the chain Othon Hotels during the COVID-19 pandemic period. For this purpose, a quantitative research was carried out with secondary data collected in Economática® and Bolsa, Brazil, Balcão (B3) in the period from 2016 to 2020. The results showed the reduction in indicators in the period analyzed. Specifically in 2020, a more significant drop was observed if compared to the previous periods, leading to the conclusion that the impacts generated by the restrictions to contain the virus transmission was felt by the company, reducing considerably its income and profit in the period, increasing dependence on third-party capital, which was reflected in the indicators studied.
The Three-Factor Experiment on Microwave Micronization of Grain Feed
Authors:   Federal Scientific Agroengineering Center VIM, Sobchenko Yuriy A. , Belov Aleksandr A. , Omarov Akylbek N. ,   West Kazakhstan Innovation and Technological University
Published: October 2021

To obtain the most reliable information about the object of research with minimal time and financial costs, it is necessary to search for a rational sequence of data collection on the characteristics of micronization of grain feeds. (Research purpose) The research purpose is in conducting experimental studies of UHF micronization of grain feeds. (Materials and methods) The article presents a full factor experiment as the method of planning and conducting the experiment, this method serves to find the optimal conditions and rules of processes occurring during ultrahigh-frequency processing of grain feed raw materials. Micronization was carried out in the developed installation, which provides the addition of magnetron powers to reduce the cost of the installation and the operating costs of micronization. Authors conducted experiments on feed barley of the second production class. During the experiment there was used the grain moisture meter "Fauna-M", ultra-high-frequency magnetron generators 1 kW Daewoo M 218 and caliper ShTs-1. (Results and discussion) A complete three-factor experiment was performed, as a result of which the influence of design parameters and installation modes on the properties of grain feed was studied on the example of feed barley when adding the magnetron powers in the device. The article presents experimental data on the measurement of the exchange energy content in samples of feed barley grain. Its increase was revealed, which is the main physical and chemical characteristic of the process of micronization of grain feed. (Conclusions) The article presents optimal ratios of variable essential factors, compliance with which can contribute to an increase in the exchange energy content in feed barley grain samples from 12 to 13.1 megajoules per kilogram: humidity of 16.5 percent, the power level of the second device, the height of the radio-transparent end of the waveguide relative to the grain layer level of 41.7 millimeters.
A Mixed-Methods Analysis of Physician Abortion Practice After Residency
Authors: Gill Sabrina , Jackson Quinn , Weitzen Sherry
Published: October 2021

Background and Objectives: In the United States, 89% of counties have no clinics providing abortion care. Though training residents increases intention to provide abortion care, rates of postresidency abortion provision are low. This study, conducted at one family medicine residency program in the Southwest United States, examines graduates’ postresidency practice of abortion care in the context of their intent to provide during residency training.
Methods: We collected cross-sectional data from a survey of graduates of University of New Mexico Family Medicine Residency from 2005 to 2017. We performed a mixed-methods analysis using descriptive statistics and conceptual content analysis, including a new methodology of performing content analysis of four subgroups based on intention to provide abortion care at different time points.
Results: The response rate was 46%, with 54 responses to 115 surveys. Only 35% residents who intended to provide abortion care had done so after graduation from residency. Barrier analysis revealed that the three most frequent barriers were structural, with 52% of respondents saying that their workplace would not allow abortion care. The two most frequent themes affecting intention were “competence” and feeling that abortion care was “medically necessary.” However, the two most common themes affecting actual practice were “workplace support” and local “patient access.”
Conclusions: This study provides information about the themes associated with changing intentions and practice of abortion care, which may help elucidate new strategies for training residents to anticipate and address challenges to postresidency provision. The study also provides some insight into residents with no intention to provide abortion care in residency who develop an intention to provide abortion care after graduation, which is a group of people for whom there is little information.
Who’s Guarding the Gate? The Reach of Prereviewed Emerging Science and Implications for Family Medicine Education
Authors: Anderson LaKesha N. , Ledford Christy J.W.
Published: October 2021

Background and Objectives: Online publication of prereviewed manuscripts disseminates research simultaneously to scientists, clinicians, and patients, enabling the media and public to act as scientific reviewers for studies that are not yet endorsed by the scientific and clinical community. This study describes the reach of prereview literature and frames it within the pursuit to teach evidence-based medicine.
Methods: In this deductive content analysis, the primary unit of analysis was the individual preprint manuscript submitted to the medRxiv preprint server during the emergence of the COVID-19 pandemic. The coding scheme included study design, negative or positive findings, dissemination status (whether it was withdrawn from the server or eventually published), and three levels of reach: user engagement, news media coverage, and social media engagement.
Results: Prereviewed manuscripts describe a variety of study methods. Dissemination status was significantly related to abstract views, manuscript views, news coverage, and social media exposure. Studies with negative findings had higher counts of abstract views, manuscript views, and news coverage, but no significant relationships were detected.
Conclusions: Results demonstrate that not only are scientists publishing negative findings, but that those studies reach a wide audience. Notably, eventually-withdrawn manuscripts, potentially containing incomplete or uncertain science, is reaching the public domain. Increasingly, family physicians will need to critically appraise emerging literature before it is peer reviewed, whether they encounter it in their own searches or when a patient presents information they found before an appointment.
Transgender Education in North American Family Medicine Clerkships: A CERA Study
Authors: VanDerKolk Kristi , McKinney Vicki R. , Graves Lisa , Harper Diane M.
Published: October 2021

Background and Objectives: Transgender persons face many barriers to accessing health care, including identifying a knowledgeable physician. Medical schools have made curricular changes addressing cultural competence in transgender medicine, but changes are inadequate to graduate physicians competent in gender-affirming health care. The aim of this study was to assess the current state of education on the comprehensive health care of transgender patients, including gender-affirming health care (GAH) strategies (hormone therapy, surgical interventions) in US and Canadian family medicine clerkships (FM clerkships) in addition to the beliefs and actions of the directors making those curricular decisions.
Methods: Questions regarding transgender education within FM clerkships were included in the 2018 Council of Academic Family Medicine’s Educational Research Alliance (CERA) survey of family medicine clerkship directors. The online survey was distributed via email invitation to 128 US and 16 Canadian FM clerkship directors between June 21, 2018 and August 4, 2018.
Results: Seventy-two percent (68/94) of FM clerkship directors agreed transgender health care should be a required part of the medical school curriculum. Sixty-six percent report active advocacy within their institutions for increased curricular time devoted to transgender health care. Fifty-six percent (53/94) treat transgender patients in their own clinical practice, but just 26% agreed they were comfortable teaching transgender health care to medicals students. While the presence of transgender patients within the clinical practice did not have a significant impact on FM clerkship directors’ comfort teaching this subject, having transgender friends or acquaintances did.
Conclusions: FM clerkships are primed for inclusion of comprehensive transgender and GAH education in their curriculum. Increasing comfort of FM clerkship directors in teaching this subject area by providing accessible curriculum may encourage further uptake of this content into FM clerkships.
A Master Class in Family Doctor Leadership: Evaluating an Innovative Program
Authors: White David , Carroll June C. , Crann Sara , Shapiro Marla , Whitehead Cynthia , Freeman Risa , Glazier Richard H. , Martin Danielle , Kidd Michael
Published: October 2021

Background and Objectives: In family medicine, leadership is critical for health care delivery, advancing curricula, research, and quality improvement. Systematic reviews of leadership development programs in health care identify limitations, calling for innovative designs and rigorous assessment. Our objective was to evaluate the impact of applying master class principles to leadership development in academic family medicine.
Methods: We used mixed methods to assess the impact of an innovative master class program on 15 emerging leaders in a large academic department of family medicine. The program consisted of five sessions where family physician masters shared their wisdom, techniques, and feedback with promising leaders. Quantitative evaluation involved participants’ ratings of each session’s content and delivery using a 5-point Likert scale. We assessed postcourse semistructured interviews with participants qualitatively using descriptive thematic content analysis.
Results: Individual sessions were highly evaluated, with a combined mean of 4.82/5. Qualitative thematic analysis identified self-perceived increased effectiveness in leadership activities; increased confidence as a leader; increased motivation to be a leader; and perceptions of value from the program, contributing to what participants described as unexpected potential change within themselves. Themes related to effectiveness of the program were practical advice; networking; diverse topics; accessible speakers sharing personal stories; and small-group, informal, early-evening format.
Conclusions: Master class concepts can be adapted to leadership development in academic family medicine, with evidence of early positive impact on participants’ self-perception of leadership skills and confidence. Further research is warranted to assess organizational impact and applicability to other settings.