bluuebunny/crossref_metadata_2025 huggingface dataset:
Friends, physical activity, and sedentary behavior in university students: A social network analysis
Authors: Arango-Paternina Carlos Mario , Cardona-Gómez Jason , Arboleda-Serna Víctor Hugo , Muñoz-Rodríguez Diana Isabel
Published: June 2021

Introduction: Understanding the processes of socialization during youth and their association with healthy behaviors is crucial for university education.
Objective: To explore the associations of the characteristics of friendship networks with being physically active and having a sedentary behavior in university students.
Materials and methods: Cross-sectional study conducted in 475 university students and based on a social network analysis. Measurements included sociodemographic, physical activity, sedentary behavior, and friendship network variables. The associations between the characteristics of friendship networks and physical activity and sedentary behavior were explored using logistic regression models. Confidence intervals (95%) were estimated and a significance level of p<0.05 was considered.
Results: In women, being part of at least a cluster of friends was significantly associated with being physically active (adjusted OR [aOR]: 2.3; 95%CI: 1.2-4.6), while being popular was significantly associated with a lower probability of being physically active (aOR: 0.3; 95%CI: 0.1-0.7). Also, a ten-percentage point increase in active friends was significantly associated with a higher probability of being physically active (aOR: 9.3; 95%CI: 3.5-24.6). Regarding sedentary behavior, a ten-percentage point increase in the number of sedentary friends was significantly associated with a higher probability of being sedentary (aOR: 5.5; 95%CI: 2.5-12.3). In men, none of the studied associations were statistically significant.
Conclusion: Some characteristics of social network are relevant for female university students in relation to their physical activity levels and sedentary behaviors. These findings highlight the need to consider friendship network dynamics for designing initiatives aimed at physical activity promotion and sedentary behavior reduction.
Frequency of pulp canal obliteration in primary teeth after traumatic dental injury and its association with related variables
Authors: MOURA Samantha Alves do Nascimento , MACHADO Keilla Couto , LENZI Michele Machado , ANDRADE Marcia Rejane Thomas Canabarro , MARSILLAC Mirian de Waele Souchois de , CAMPOS Vera
Published: June 2021

ABSTRACT Objective The aim of this study was to determine the frequency of pulp canal obliteration (PCO) after traumatic dental injury (TDI) of primary anterior teeth and to investigate its relation with the related variables. Methods This retrospective study has been done with dental records of patients selected from the Paediatric Dental Trauma Clinic between 2006 and 2016. Those who had PCO in the primary anterior teeth and were aged 0-108 months at the time of trauma were considered eligible. Data related to patients and TDI, such as sex, the child’s age at the time of trauma, aetiology, affected teeth, the child’s age at the time of the eruption of the permanent successor as well as the presence of crown discoloration were extracted from the dental records. Results Among the 483 children with traumatised teeth, 14.9% had PCO and the most of them exhibited crown discoloration. The average age of the children at the time of the trauma was 38 months and the most common aetiology of the TDI was falls. The average time for the beginning of the PCO process was 13.5 months. There was no statistically significant association between the child’s age at the time of trauma and the types of TDI, PCO and the presence of crown discoloration. Conclusions The frequency of PCO was relatively low though the presence of crown discoloration was considerable. There was no association between the child’s age at the time of trauma and the studied variable.
Adaptação transcultural e validade de conteúdo do instrumento de apoio à decisão “Making Choices: Feeding Options for Patients with Dementia” para a língua portuguesa do Brasil
Authors: Derech Rodrigo D’Agostini , Neves Fabricio Souza
Published: June 2021

RESUMO Objetivo Realizar adaptação transcultural para o português brasileiro e verificar a validade de conteúdo de um instrumento de apoio à decisão originalmente produzido em língua inglesa (Making Choices: Feeding Options for Patients with Dementia), para auxiliar a escolha da via de alimentação de pacientes com disfagia por demência em estágio grave. Método Foi realizada a adaptação transcultural com duas traduções independentes do instrumento original, síntese das traduções, duas retrotraduções independentes, nova síntese e pré-teste com 30 cuidadores para produção da versão final em língua portuguesa. A validação de conteúdo da versão final foi realizada com a análise por um comitê de 35 especialistas (médicos, fonoaudiólogos e enfermeiros brasileiros com experiência no manejo de pacientes com demência em estágio grave) e baseada no índice de validade de conteúdo e na concordância entre múltiplos avaliadores pelo kappa de Fleiss. Resultados O nível de compreensão do instrumento pelos cuidadores foi adequado em todas as suas seções e seu conteúdo foi considerado válido pelo comitê de especialistas, de forma estatisticamente significativa. Conclusão O instrumento produzido de apoio à decisão para a escolha da via de alimentação em pacientes com demência grave e disfagia, denominado “Fazendo escolhas: opções de alimentação para pacientes com demência” obteve evidências de equivalência transcultural e de validade de conteúdo para uso na população brasileira. Novos estudos são necessários para avaliar seus efeitos sobre o processo de tomada de decisão em nossa população.
Limites dos indicadores bibliométricos de bases de dados internacionais para avaliação da Pós-Graduação brasileira: a cobertura da Web of Science nas diferentes áreas do conhecimento
Authors: MELO João Henrick Neri de , TRINCA Tatiane Pacanaro , MARICATO João de Melo
Published: June 2021

Resumo Considerando o crescimento do uso de indicadores bibliométricos e cientométricos em processos de avaliação da Pós-Graduação brasileira, buscou-se identificar o nível de cobertura da Web of Science em relação à produção bibliográfica brasileira (artigos) nas diferentes Grandes Áreas do Conhecimento e Áreas de Avaliação da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, agência pública brasileira de financiamento à pesquisa, apontando limites e possibilidades da adoção desses indicadores como mecanismos de avaliação dos resultados da atividade científica dos programas que compõem o Sistema Nacional de Pós-Graduação. Para tanto, recorreu-se ao levantamento de dados da produção bibliográfica dos 4.377 Programas de Pós-Graduação cadastrados na Plataforma Sucupira nos anos de 2017 e 2018, bem como à coleta de dados da Core Collection da Web of Science. Diante dos dados empíricos e do referencial teórico adotado, evidenciou-se que 46,56% dos periódicos utilizados para publicação por pesquisadores vinculados aos Programas de Pós-Graduação brasileiros estão indexados na base, enquanto 53,44% dos periódicos utilizados não estão indexados. Demonstrou-se variações de cobertura/indexação nas diferentes Grandes Áreas do Conhecimento e Áreas de Avaliação, assim como abordou-se a necessidade de se considerar, em processos de avaliação de Programas de Pós-Graduação, os resultados das atividades científicas para além da produção bibliográfica de artigos indexados em bases bibliográficas internacionais.
Landscapes of Heathrow: The Aircraft Landing Gear Compartment and the Politics of Global Transfer
Authors: Ferguson Nicholas , Hahn Andreas
Published: May 2021

This paper, an output of an art research project, explores the agency of the aircraft landing gear compartment in global transfer. Through the prism of historical events involving aircraft preparing to land at London Heathrow, it reflects on the part played by the compartment in ecological and humanitarian struggle. Its theoretical frameworks include John Ruskin’s writing on geology, new materialism, and the planetary garden. These are brought into proximity with methodologies and collaborations developed through practice-based elements of the research, such as architectural modelling, geoforensic science and exhibition making. It incorporates an account of the process of reconstructing a compartment, as well as extracts from a microstratigraphic survey commissioned as part of the project. It examines the landing gear compartment’s capacity as a vessel in which dust, seeds, insects, pollen and even people are transported around the globe. It explores, too, its role as expository instrument, as far as it makes available for inspection the politics inscribed into its formal, spatial and temporal configuration. The paper argues that the wheel bay gives shape to a set of otherwise intangible aeromobilities, knowledge of which is integral to a nuanced understanding of the political geography of London Heathrow.
Mechanochemical technology of iron extraction from enrichment tailings
Authors: Golik V. I. , Dmitrak Yu. V. , Razorenov Yu. I. , Maslennikov S. A. , Lyashenko V. I.
Published: June 2021

The article describes the results of studies on ore dressing waste processing at the enterprises of the Kursk Magnetic Anomaly with production of metals and building materials. About 1.8 billion tons of tailings were stored there. Significant feature of deposits formation is division of tailings by size and specific gravity in water stream, since tailings are transported from the enrichment plant to the tailing dams by hydrotransport. Characteristics of the tailings from wet magnetic research method was applied, including system analysis and scientific generalization, data processing using methods of statistics, probability theory and mathematical modeling. The authors have systematized the results of tailings leaching of following types: agitation leaching in percolator, agitation leaching after activation in disintegrator in the dry state and reagent leaching in disintegrator. Regression analysis of experimental data have been carried out, on the basis of which graphs of dependence of iron extraction on the values of variable process factors were constructed. The used enrichment technologies are limited by extraction limit, which results in processing tailings. The use of these tailings by traditional technologies is not economically efficient, and upgrading of enrichment processes is advisable using hydrometallurgical and chemical technologies. Promising direction in metals extraction from mining waste is combination of processing technologies based on possibilities of both chemical enrichment and activation in disintegrator. It was determined that mechanochemical activation of tailings in disintegrator simultaneously with leaching can significantly increase extraction while the processing time is reduced hundredfold. Recommended technology may be in demand at mining enterprises with the prospect of transition to underground mining.
Influence of ferrous metallurgy enterprises on atmospheric air quality as an ecological component of territories sustainable development. Report 1
Authors: Glushakova O. V. , Chernikova O. P.
Published: June 2021

The main provisions of the Concept of Sustainable Development, formulated in 1992 at the conference in Rio de Janeiro, based on the economy – environment – society sustainability triad, are accepted as the basis for development by most countries. Over the past period, an institutional framework for sustainable development has been formed both at the international level and at the level of states. Reducing level of air pollution is one of the key tasks, solution of which is necessary to achieve the 2030 Sustainable Development Goals stated by the United Nations. Despite of adoption of the Concept of Transition to Sustainable Development in Russia back in 1996, focus on environmental component took a long time to be made. The article considers the stages of regulatory environment development aimed at ensuring sustainable development and reducing level of air pollution in Russia. It was revealed that a significant expansion of the regulatory and legal field in this area occurred only in 2017 – 2019. In many ways, this is due to Russia’s orientation towards achieving the 2030 Sustainable Development Goals stated by the UN, and adoption of the national development goals of the Russian Federation. It was found that despite the use of such financial mechanisms as the state program of the Russian Federation “Environmental Protection” and the national project “Ecology” to achieve sustainability goals, the share of environmental protection expenditures in total expenditures of the federal budget in 2019 was only 1.3 %. At present, in twelve cities of the Russian  Federation, level of air pollution is assessed as high and very high. In seven of them, ferrous metallurgy enterprises operate, which exert significant anthropogenic pressure on the environment.
Accounting method for residual technological stresses in modeling the stress-deformed state of a railway wheel disk. Report 1
Authors: Snitko S. A. , Yakovchenko A. V. , Gorbatyuk S. M.
Published: June 2021

The work is devoted to development of a method for accounting residual technological stresses in wheel disks, which will provide both the versatility of the approach and the accuracy of calculations. The analysis of stresses in the wheel disk from the action of assembly (interference between the hub and the axle) and operational loads is carried out on basis of the results of finite element modeling. Verification of adequacy of the used model was made by comparing the calculated information with the experimental data of JSC “VNIIZHT”. The analysis of calculated and experimental values of radial stresses was carried out for the most loaded (critical) zones of the disk during operation – the zones of its interface with the rim and the hub. It was found that by setting the interference fit value to be greater than the actual one, it is possible to obtain the formation of additional stresses in the wheel, which, with a sufficient degree of accuracy, reflect the effect of residual technological stresses on its stress-strain state. On the example of calculating a wheel with a flat-conical disk (GOST 10791 – 2011), it is shown that an increase in the interference fit value by 60 % (from 0.25 mm to 0.4 mm per diameter) makes it possible to adequately predict the magnitude of stresses in the most critical disk elements. The maximum relative deviations of the calculated values of radial stresses from the experimental ones, both along the outer and inner sides of the wheel, do not exceed 14 %. Despite the simplicity of implementation, the proposed method provides an increase in the accuracy of predicting the strength characteristics of wheels, as well as the possibility of using it for various standard wheel sizes.
COVID-19 y desigualdades en América Latina: ¿revés de fortuna?
Authors: Chiodi Vera
Published: May 2021

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Aportes de enfoques clínicos en las ciencias sociales. El caso de las violencias traumáticas
Authors: Périlleux Thomas
Published: May 2021

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La enfermedad ya me conoce: la historia de Doña Irma, una sanadora kichwa en tiempos de COVID-19
Authors: Anda Basabe Susana , Trujillo Montalvo Patricio
Published: May 2021

En Ecuador el acelerado contagio de la enfermedad producida por coronavirus (COVID-19) fue desatendida desde el ámbito de salud pública, las prioridades del gobierno no se dirigieron hacia las poblaciones más vulnerables, por lo que al inicio de la pandemia las comunidades indígenas de la región amazónica fueron fuertemente impactadas. El presente artículo analiza las estrategias de una familia indígena kichwa para enfrentar la enfermedad, describiendo mediante narraciones etnográficas las experiencias relacionadas al contagio y propagación del virus en la Amazonía ecuatoriana. El conocimiento sobre prácticas curativas, remedios antiguos que curaron otras pandemias y la incorporación de nuevos remedios permitieron hacer tolerable la enfermedad, disminuyendo notablemente el porcentaje de mortalidad en comparación con espacios urbanos.
Movimientos sociales y ayuda mutua frente a la pandemia
Authors: Pleyers Geoffrey
Published: May 2021

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Deterministic Application of Process-centric Law to the System-centric Requirements of Procurement Procedures
Authors: Wickens David John
Published: May 2021

South Africa's public procurement system is accorded constitutional status, establishing fundamental requirements for the operation of the system. The application of these constitutional system requirements and their interpretation in the judicial adjudication of procurement cases have highlighted the tension between the administrative, or process-centric, legal requirements and the system-centric nature of procurement procedures. The importance of a deterministic approach for procurement decision-making can be considered from two angles – the certainty of the procurer in the conformity of its own conduct and external certainty to diminish the risk of unnecessary challenge.

This article revisits the foundational rationale for system-based procurement procedures and associated decision-making for its potential for finding a deterministic approach to balancing the legal requirements, both system- and process-based. These principles are tested against a selection of adjudicated outcomes to formulate practical recommendations for practitioners aimed at deterministic decision-making in the procurement process.
What's new for the clinician? - Excerpts from and summaries of recently published papers
Authors: Yengopal Veerasamy
Published: May 2021

1. Is there an association between stress and periodontitis? JM Coelho, SS Miranda, SS da Cruz, et al. Is there association between stress and periodontitis? Clinical Oral Investigations. 2020; 24: 2285-94.

2. Is there an association between periodontitis and all-cause and cancer mortality? P Chung, T Chan. Association between periodontitis and all-cause and cancer mortality: retrospective elderly community cohort study. BMC Oral Health. 2020; 20: 168.
Oral health care for patients undergoing therapy for head and neck cancer in KwaZulu-Natal, South Africa - A qualitative study
Authors: Bauluck-Nujoo Bibi S , Singh Shenuka
Published: May 2021

BACKGROUND: There is limited published evidence in KwaZulu-Natal on access to oral health care for patients undergoing cancer therapy in the head and neck region. OBJECTIVES: This study aimed to assess patients' oral health-related perceptions, practices and needs during cancer therapy. METHODS: This was a descriptive case study. A semi-structured face-to-face interview was conducted with volunteers (n=12) undergoing cancer therapy in head and neck region. Purposive sampling was used to select study participants who were recruited from a public tertiary central referral hospital in KwaZulu-Natal. A semi-structured interview was also conducted with the eThekwini district coordinator for oral health services to gain better insight into oral health service delivery for patients with special needs. RESULTS: The results indicated that oral health care in the sample population was not prioritised. Some of the emergent themes included: participants' knowledge and oral health self-care practices, support for participants to cope with head and neck cancer, barriers in accessing facility-based oral health care (poor access to dental services, failure of the local clinic to provide appropriate care), lack of referral by oncology care practitioners for patients to access dental care, and existing gaps in oral health service delivery The reported non-existence of a specific oral health policy to address cancer and the absence of a risk factor intervention program highlighted some of the shortcomings for quality oral health service delivery in this population group. CONCLUSION: The results indicated that oral health care is important for patients undergoing cancer therapy. There is an urgent need for oral health planning in the province to take into account the specific oral health needs of this vulnerable population.
During the COVID-19 pandemic, oral health services including routine treatment may continue but must follow established international and South African protocol
Authors: Makhubele KC
Published: May 2021

The South African Dental Association (SADA) hereby responds to the statement released by the World Health Organization (WHO): Considerations for the provision of essential oral health services in the context of COVID-19, on 7th August 2020.

After careful consideration and in consultation with workstreams working in various protocols regarding the provision of oral health services during the COVID-19 pandemic, SADA respectfully yet strongly disagrees with the World Health Organization's (WHO) recommendation to delay "routine" dental care in certain situations due to COVID-19.

A blanket statement such as the recent one by the WHO cannot, therefore, be supported. It is without a doubt that oral health is integral to overall health and neglect and delay of certain treatments may lead to extensive damage and increased financial implications to correct.

Consequently, dentistry is essential healthcare, because of its role in evaluating, diagnosing, preventing or treating oral diseases, which can adversely affect systemic health. Each country is at a different stage of the pandemic and each country has to respond appropriately based on its assessment of its unique situation.
The 'Digital Access Divide' at a South African Dental School - A cross-sectional study - Part 1
Authors: Postma Thomas C , Sykes Leanne M , Uys André , Brandt Paul , Crafford Elmine
Published: May 2021

This study sought to investigate the digital divide, from an access perspective, of dental students at the University of Pretoria. Second to final year students (n= 218 (87.2% response rate) completed a custom-designed survey at the end of 2017. The investigation enquired about the digital devices and infra-structure they owned and used for study purposes. They were also asked to reveal the networks and resources they used to access online platforms and to comment on any other related access issues such as the quality of the Internet, speed and reliability, as well as cost and personal implications related to usage. A clear divide could be detected for a minority of students (±1/7). Individually targeted interventions will be required to ensure an equitable and fair online learning experience.
A giant submandibular sialolith - How to manage?
Authors: Anand Jawahar , Suresh Amal , Desai Anil K
Published: May 2021

The presence of a sialolith is one of the most common diseases of salivary gland. It is relatively common in submandibular salivary glands and its duct. This case report is of a patient who presented at our unit with a history of severe pain and swelling on floor of the mouth, which was clinically and radiographically diagnosed as a sialolith. The diagnostic and treatment protocol in managing a patient with a giant sialolith is enumerated in this manuscript.
Maxillofacial Radiology 183
Authors: Nortjé Christoffel J
Published: May 2021

A clinical picture of a thirty year old female who presented with a non-ulcerated swelling which has been present for the last eighteen months. The teeth in the region have been extracted ten months ago but the swelling in the left upper jaw increased in size causing nasal obstruction.
Life events, social-economic status and general disposition of Hungarian youth in the Karpathian basin
Authors: Veres Valér
Published: June 2021

This is a study of the formation and length of the youth period of the 15-29 aged Hungarian population of Hungary’s neighboring countries, as well as the age and mode of incurrence of this period’s most important life events. It is based on the Hungarian and majority sample of the research called Mozaik 2001, which can be taken as a sort of a radiogram of a society. The author, Valér Veres is a sociologist, and teaches at the University of Kolozsvár
Classification of glycosyl hydrolases based on structural homology
Authors: Fülöp László , Ponyi Tamás
Published: June 2021

Glycosyl hydrolases are a well-known group of enzymes, which hydrolyze the glycosidic bond between carbohydrates, or between a carbohydrate and different molecules. Glycosyl hydrolases play a vital role in the human body, and are widely used in industrial applications. Glycosyl hydrolases classification is based on substrate specificity and amino acid or nucleotide sequence similarity which reflects their evolutionary relationship. Our aim, in this study, was to carry out the classification of glycosyl hydrolases, based solely on structural similarity which was made possible by the several structures available in the databases and the availability of computing power to conduct such a computationally intensive task, in a reasonable time-frame. It was also aimed that the structural similarity based classification be compared to the present classification system. Based on an all-against-all comparison, we conducted a structural comparison of glycosyl hydrolases. The results are presented graphically. The graphical representation defined 24 structurally homologous classes. The classification was validated using Cα - Cα distance analysis and amino acid sequence cluster analysis. Advantages of this method are that – being an automated method – it is fast, simple and reproducible. Glycosyl hydrolases could be classified into 24 separate classes. N-glycosyl and O-glycosyl hydrolases (both forming binding and catalytic domain classes as well) were clearly different, the former consisting of 8 classes, and the latter consisting of 16 classes. Structural classes simplified the previous classification system. This classification represents the current glycosyl hydrolase family system, but also extends it especially concerning the clan system.
The prognostic significance of different proportion of signet-ring cells of colorectal carcinoma
Authors: Chen Wei , Cai Huajun , Chen Kui , Liu Xing , Jiang Weizhong , Li Shoufeng , Zhang Yiyi , Chen Zhifen , Guan Guoxian
Published: May 2021

While the prognosis of patients with partial SRCC (PSRCC) has been rarely reported, colorectal signet-ring cell carcinoma (SRCC) has been associated with poor prognosis. The aim of this study was to analyze the prognosis of patients with different SRC composition and establish a prediction model. A total of 91 patients with SRC component were included in the study. These patients were divided into two groups: SRCC group (SRC composition > 50%; n=41) and partial SRCC (PSRCC) group (SRC composition ≤ 50%; n=50). COX regression model was used to identify independent prognostic factors for overall survival (OS). A predictive nomogram was established and compared with the 7th AJCC staging system. After a median follow-up of 16 months, no significant difference in OS was observed in either group. Preoperative carcinoembryonic antigen (CEA) level, pN stage, M stage, preoperative ileus, and adjuvant chemotherapy were independent prognostic risk factors for OS (p<0.05). A nomogram for predicting the overall survival of colorectal SRCC was established with a C-index of 0.800, and it showed better performance than that of the 7th AJCC staging system (p<0.001). In summary, the ratio of SRC component was not an independent prognostic factor of the OS. Those patients with less than 50% of SRC component should be given the same clinical attention. A predictive nomogram for survival based on five independent prognostic factors was developed and showed better performance than the 7th AJCC staging system. This resulted to be helpful for individualized prognosis prediction and risk assessment.
Socialist Constitutional Legacies
Authors: Belov Sergei , Partlett William , Troitskaya Alexandra
Published: June 2021

With the end of the Cold War, many assumed that socialism, together with the speciﬁc constitutional values and political structures was dead (or dying). This article will challenge these assumptions. Post-Cold War reality did not, however, follow these assumptions. Some countries, especially in Asia, continue to adhere to socialist constitutional approaches. Some cannot fully overcome their socialist legacy. And still others include socialist values in their constitutions and practice. These values and ideas warrant study. Most notably, socialism carries with it a certain set of values and, consequently, a corresponding pressure on legal institutions. The authors, guest editors of this special issue of the Russian Law Journal on the socialist legacies in the world constitutions, outline a general approach for the study of socialist constitutional legacies. The article therefore addresses (a) the methodology of socialist constitutional legacies analysis, (b) the core values of the socialist constitutions and (c) ways in which socialist constitutional ideas and concepts can be combined with the principles of constitutionalism. This analysis raises a number of important – but under-researched questions. One is the extent to which these socialist ideas or concepts are actually socialist. Another is the extent to which these ideas can be included in constitutional discourse.
Experiências dos programas de alimentação escolar: um estudo bibliométrico
Authors: Silva Romário Nunes da , Bezerra Amanda Souza , Soares Beatriz Oliveira , Severo Jessica Porfirio , Andrade Horasa Maria Lima da Silva , Andrade Luciano Pires de
Published: June 2021

RESUMO: Os programas de alimentação escolar despontam como um dos instrumentos capazes de melhorar a nutrição e segurança alimentar dos estudantes. Além disso, programas como PNAE (Programa Nacional de Alimentação Escolar) tem fortalecido a agricultura familiar ao preferir a aquisição de seus produtos. Nesse sentido, o presente estudo teve por objetivo traçar um panorama de publicações que trazem experiências dos impactos de programas de alimentação escolar à nutrição e segurança alimentar dos estudantes e os ganhos socioeconômicos dos agricultores familiares. Como instrumento metodológico utilizou-se a bibliometria. A coleta dos dados aconteceu em julho de 2020 e abrangeu a produção de artigos científicos entre os anos de 2005 e 2019. Como fonte de dados, realizou-se uma varredura nas bases de dados acadêmicas da Scielo, Scopus e Web of Science. Para a busca dos artigos, utilizou-se uma combinação dos termos “Programa nacional de alimentação escolar”; “Merenda escolar e segurança alimentar e nutricional”; “Agricultura familiar e adesão à alimentação escolar”. Tais termos também foram aplicados no idioma inglês. Considerou-se apenas artigos científicos de cunho teórico-empírico. Após uma triagem que excluiu os artigos repetidos e os que não atendiam ao tema, restou-se 46 artigos, os quais foram analisados no presente estudo bibliométrico. Verificou-se uma concentração de publicações em um grupo de periódicos, o que contempla os preceitos da Lei de Bradford. Quanto a produtividade por autor, a Lei de Lotka não foi amplamente atendida, pois, verificou-se uma pulverização da produção e do total de 160 autores encontrados com a pesquisa, somente 19 autores possuem mais de uma publicação sobre o tema. As palavras de maior recorrência foram Agricultura Familiar, PNAE e Alimentação Escolar. Em relação aos procedimentos metodológicos, constatou-se que a abordagem qualitativa foi a mais utilizada. O tema políticas de alimentação escolar tem relevância científica, assim, a realização de avaliação sobre os níveis dessas produções é válido.

Palavras-chave: Agricultura familiar; Bibliometria; PNAE.
Data Mining: A Bagged Decision Tree Classifier Algorithm For Ids Intrusion Detection System Based Attacks Classification
Authors: Sandeep Adhikari, Dr. Sunita Chaudhary
Published: May 2021

The exponential growth in the use of computers over networks, as well as the proliferation of applications that operate on different platforms, has drawn attention to network security. This paradigm takes advantage of security flaws in all operating systems that are both technically difficult and costly to fix. As a result, intrusion is used as a key to worldwide a computer resource's credibility, availability, and confidentiality. The Intrusion Detection System (IDS) is critical in detecting network anomalies and attacks. In this paper, the data mining principle is combined with IDS to efficiently and quickly identify important, secret data of interest to the user. The proposed algorithm addresses four issues: data classification, high levels of human interaction, lack of labeled data, and the effectiveness of distributed denial of service attacks. We're also working on a decision tree classifier that has a variety of parameters. The previous algorithm classified IDS up to 90% of the time and was not appropriate for large data sets. Our proposed algorithm was designed to accurately classify large data sets. Aside from that, we quantify a few more decision tree classifier parameters.
Spectral Artificial Vision Endoscopy for Assisting the Differential Diagnosis of Endometrial Polyps, In Vivo
Authors: F Gkrozou , C Rossos , A Tsapras , N Kortsalioudakis , O Tsonis , C Balas , M Paschopoulos
Published: May 2021

We are the first to present results from a pilot clinical study designed for the purpose of establishing spectral mapping patterns, as a potential novel imaging assay for identifying and discriminating between functional and nonfunctional endometrial polyps in vivo. The Spectral Artificial Vision Endoscope (SAVE) was used and validated in this study. The SAVE system, adapted to a regular hysteroscope, was able to operate in several  imaging modes, including color imaging, infrared imaging, narrow band imaging and spectral mapping, all acquired at a video rate and simultaneously. The spectral maps generated by the SAVE system for 28 patients  with endometrial polyps displayed characteristic patterns capable of discriminating functional from nonfunctional polyps with remarkable consistency (Spearman R=0.912, p<10-6). These preliminary clinical validation results highlighted the great potential of the in vivo spectral mapping imaging modality as an adjunct tool to conventional color camera-based hysteroscopy, offering improved and quantitative diagnosis.
“Environment Is Like Nature”: Opinions Of Children Attending Forest Kindergarten About The Concept Of Environment
Authors: AHİ Berat , KAHRİMAN PAMUK Deniz
Published: May 2021

The purpose of the current study is to determine the opinions of children attending forest kindergarten about the concept of environment. The participants of the study are thirty six 50-70 month-old children attending a forest kindergarten. In line with the purpose of the study, the triangulation design, one of the qualitative research models, was used. In the quantitative dimension of the current study, the children were asked to draw what comes to their mind when they hear the word “environment” and then interviews were conducted with the children about their drawings. Then, on the basis of the codes derived from the drawings and DAET-R, it was attempted to understand the structure of their opinions about environment. In the qualitative dimension of the study, interviews were conducted according to the phenomenological design. As a result of the analyses conducted, it was concluded that the children generally evaluated nature as environment. In both drawings and interviews, the children generally drew and mentioned biotic and abiotic factors. The concepts of human and designed environment were rarely emphasized in the drawings and interviews. Given that the participating children were attending a forest kindergarten it was already expected by the researchers that their opinions would be “nature” centred. In light of these findings, it is thought that it is important to make educational programs built on environmental education more widespread.
Cytotoxic Effect of Addition of Different Concentrations of Nanohydroxyapatite to Resin Modified and Conventional Glass Ionomer Cements on L929 Murine Fibroblasts
Authors: Golkar Parisa , Ranjbar Omrani Ladan , Zohourinia Shide , Ahmadi Elham , Asadian Faeze
Published: May 2021

Objectives: In this study we assessed the cytotoxic effect of nanohydroxyapatite (NHA) incorporated into resin modified and conventional glass ionomer cements (RMGICs and CGICs) on L929 murine fibroblasts.
Materials and Methods: In this in vitro study, 0wt%, 1wt%, 2wt%, 5wt%, 7wt% and 10wt% concentrations of NHA were added to Fuji II LC RMGIC and Fuji IX CGIC powders. Eighteen samples (5×3mm) were fabricated from each type of glass ionomer, in six experimental groups (n=3): CG0, CG1, CG2, CG5, CG7, CG10, RMG0, RMG1, RMG2, RMG5, RMG7, and RMG10. Samples were incubated for 72h. The overlaying solution was removed and added to L929 fibroblasts. The methyl thiazolyl tetrazolium bromide (MTT) assay was performed at 24, 48 and 72h. The wavelength was read by a spectrophotometer. Data were analyzed by ANOVA and Tukey’s test.
Results: There was no significant difference in cytotoxicity of the two types of glass ionomers, with and without NHA, except for CG0 and RMG0 groups after 72h. RMG0 group was significantly more cytotoxic than the CG0 group (P<0.05). In CG groups during the first 24h, the cytotoxicity of CG5 and CG7 groups was significantly higher than that of CG1; while, there was no significant difference between the RMG groups. Cytotoxicity significantly decreased in all groups after 24h (P<0.05).
Conclusion: Incorporation of NHA into Fuji II LC RMGIC and Fuji IX CGIC did not affect their biocompatibility and therefore its addition to these materials can provide favorable biological properties, especially considering its beneficial effects on the other properties of GICs.
A Social-Cognitive Educational Protocol for Parents with Adolescents at Risk of Substance Use: Impact on Adolescents' Life Skill
Authors: Gharaati Sotoudeh Hossein , Nazari Masoud Aref , Mirhashemi Malek
Published: May 2021

Objective: The aim of this study was to instruct social cognitive protocol based on life skills and parenting skills to parents with teenagers at substance use risk and also to investigate its effectiveness among teenagers.
Method: The present study is a quasi-experimental study with a pretest, posttest, and follow-up approach with a group in 3 stages of measurement. The statistical population included 70 adolescents at risk of substance abuse who were selected using the available sampling method. The survey consisted of 40 questions about adolescents' life skills in four subscales of self-control skills, assertiveness and saying no skills, decision-making skills, and problem-solving skills, and the reliability of the entire questionnaire was estimated to be 0.98 using the Cronbach's alpha method. In this study, adolescents were first given a test, and after two weeks, their parents learned the social cognitive protocol over a 12-week period and were asked to impart these skills to their adolescents at home. After that, the adolescents gave the same test after the intervention (posttest). Two months after the posttest, the follow-up test was performed without any training.
Results: Comparison of the mean of the three stages of measurement showed that the effect of the overall life skills score, according to the value of Wilkes Lambda multivariate test (0.666) with degrees of freedom two and 40, can be rejected as a null hypothesis (P <0.01). In addition, in the subscales of decision-making skills (0.781), problem-solving (0.688), and self-control (0.816), the mean score of the participants in the three measurements was simultaneously different; and in the follow-up stage, the scores were significantly different than the pretest. However, in terms of assertiveness and the skill of saying no, the scores did not differ simultaneously in the three measurements (0.986).
Conclusion: These scores show that teaching social cognitive protocol to parents of adolescents who are at risk of substance abuse is effective.
Comparing Sexual Function between Opioid Dependents Consuming Methadone or Opium Tincture
Authors: Moeeni Sedigheh Sadat , Rastgoo Sisakht Reza , Vousooghi Nasim , Kamali Koorosh , Raisi Firoozeh , Mokri Azarakhsh
Published: May 2021

Objective: Sexual dysfunction is a side effect of methadone maintenance therapy (MMT). Opium Tincture (OT) has been used as a maintenance treatment. This study aimed to determine and compare the trend of sexual function and its related factors during treatment with both drugs.
Method: An observational study was designed to measure the blood tests including free and total testosterone, prolactin, and sex hormone-binding globulin and a battery of questionnaires, including demographics and drug use history, in 42 and 53 patients entering MMT and OT treatment before and 1 and 3 months after the treatment.
Results: Significant changes in testosterone levels were observed in the MMT but not the OT group. The difference between the two groups was not significant. Neither between nor within changes in the sexual function and premature ejaculation scores were significant (P =0.370& 0.698). Anxiety levels were significantly different (P= 0.001) within and between groups. There was a considerable difference in the trend of depression changes in the OT group, but not different in MMT group and between the two groups.
Conclusion: No difference was found between MMT and OT effects on sexual function variables. The decrease in Testosterone during the three months of MMT, was not associated with diminished sexual function. In the MMT group, anxiety levels diminished during treatment. It seems that decreased testosterone in the MMT group was compensated by improved anxiety. Gonadotropin levels may not be the sole determinant in sexual activity, and complex interaction of mood and anxiety, agonist levels, and gonadotropins are involved.
The Possible Direct Correlation between Cognitive Impairment and Fear of Catching COVID-19 among Patients with Multiple Sclerosis
Authors: Saeedi Roghayyeh , Rezaeimanesh Nasim , Sahraian Mohammad Ali , Moghadasi Abdorreza Naser
Published: May 2021

Objective: The prevalence of cognitive impairment in multiple sclerosis (MS) is significant and it is estimated that 40% to 70% of patients with MS suffer from this impairment. COVID-19 is also a new infectious disease. The symptoms of this disease, which include fever, shortness of breath, and cough, can be mild to severe and can even lead to death. Due to the use of immunosuppressive drugs by Patients with MS, they might be at greater risk of catching COVID-19. Thus, patients with MS may be more afraid of catching the virus. One of the important factors is the relationship between cognitive deficit and the increase in patients' fear of COVID-19. The aim of this study was to assess the relationship between fear of catching COVID-19 and cognitive impairment in patients with MS.
Method: This cross-sectional study was conducted at the MS Clinic, Sina hospital, Tehran University of Medical Sciences, Tehran, Iran. Our participants in this project were Patients with MS who were over 18 years old and had no history of other neurological and psychiatric diseases. In addition to obtaining demographic and clinical information, we measured the fear of catching the COVID 2019 via Fear of COVID-19 Scale (FCV-19S), which is 7-item questionnaire. We also used Multiple Sclerosis Neuro Psychological Screening Questionnaire (MSNQ) to assess memory and information processing speed in Patients with MS.
Results: After adjustment for age, gender, disease duration, highest level of education, MS type, and EDSS in linear regression model, as well as the MSNQ total score and fear score of catching coronavirus, the results demonstrated a significant positive correlation with P value of 0.00 and β: 0.024.
Conclusion: The present study showed a direct relationship between cognitive disorder and level of fear regarding COVID-19. Patients with more cognitive disorders were more afraid of COVID-19.
Internal Consistency and Item Analysis of the Persian Version of the Child Sensory Profile 2 in Vulnerable Populations
Authors: Mirzakhani Navid , Rezaee Mehdi , Alizadeh Zarei Mehdi , Mahmoudi Ebrahim , Rayegani Seyed Mansour , Shahbazi Marjan , Haddadiniya Ali
Published: May 2021

Objective: The purpose of the present study was to establish the item analysis and internal consistency of the Persian version of the Child Sensory Profile 2 in 2 groups of typical and atypical children (autism spectrum disorder and learning disabilities) aged 3 to 14 years.
Method: The sample of this study included 120 typical and atypical children aged 3 to 14 years who referred to schools and rehabilitation centers in Tehran were selected using multistage sampling method. To collect data, the Child Sensory Profile 2 questionnaire was used, which is a set of questionnaires of the Sensory Profile 2. To analyze the data, the discrimination index was used to determine the discriminant validity of the Child Sensory Profile 2, and the Cronbach's alpha coefficient was used to determine the reliability in terms of internal consistency.
Results: Discrimination index was satisfactory for all the items of the Child Sensory Profile 2. The values of Cronbach's alpha ranged from 0.795-0.919 in typical children and 0.617-0.901 in autistic children, and 0.792-0.920 in children with learning disabilities.
Conclusion: The Persian version of the child sensory profile 2 is a valid (discrimination with vulnerable populations) and reliable (internal consistency) tool for assessing sensory processing.
Association of +505A>G Polymorphism at TAFI Gene with Recurrent Miscarriage in Iranian Women
Authors: Alivand Razieh , Abdi Fatemeh , Dehghani-Ashkezari Mahmood , Neamatzadeh Hossein , Ekraminasab Sedigheh
Published: May 2021

Background: Recurrent miscarriage (RM) is one of the major problems of public health globally. The thrombin-activatable fibrinolysis inhibitor (TAFI) gene is a plasma zymogen that regulates both fibrinolysis and inflammation. Genetic variants within TAFI gene are presumed to be associated with development of RM. This case-control study aimed to investigate the association of TAFI +505A>G polymorphism with RM in Iranian women referred to Meybod Genetic Center.
Methods: Fifty women with RM (at least 2 miscarriages) and 50 healthy women with no history of miscarriage or other fertility complications were participated in this study. The TAFI +505A>G polymorphism was genotyped by allele specific PCR (AS-PCR) assay.
Results: The mean age of cases with RM and controls was 27.25 ± 4.31 and 28.42 ± 3.22 years, respectively. The frequency of GG genotype and G allele was 0.00% in patients and controls. There was no significant difference between RM cases and controls in terms of +505A>G genotypes and alleles.
Conclusion: This study results indicated that there was no significant relationship between the TAFI +505A>G polymorphism and RM risk in Iranian women. However, further rigorous, studies with a larger sample size and different ethnicity are necessary to confirm our findings.