bluuebunny/crossref_metadata_2025 huggingface dataset:
Applicability of Harrod-Domar Model in Explaining Economic Growth in the Philippines
Authors: Dumo Genesis A. , Ico Harriette D. , Magpantay Ederliza V.
Published: May 2023

This paper ought to determine and examine whether the Harrod-Domar model is applicable in explaining the economic growth in the Philippine setting from 1981 to 2021, whereas the variables are Gross Savings and Gross Capital Formation. Using the multivariate Ordinary Least Squares (OLS) regression, the results showed that all independent variables are shown to be positively significant parameters of GDP growth. Furthermore, several tests employed in the study, including the Variance Inflation Factor, the Breusch-Godfrey test, Breusch-Pagan-Godfrey, have no evidence of multicollinearity or autocorrelation and heteroscedasticity in the regression model. The Harrod-Domar Model economic growth that is focused on in this study was popular among developed countries, yet considering the Philippines is one of the developing countries in the world, the researchers aim to understand whether the Harrod-Domar Model is applicable in the Philippine settings.
The Modified Role to Empower Workers in the Relationship between Organizational Conflict Management Practices and Employee Performance: A Study of Telecommunications Companies Operating in the Kurdistan Region of Iraq
Authors: Muhammad Muhammad Khurshid , Khammakhem Ramadan
Published: May 2023

The study aims to identify the role of empowering workers in improving the performance of workers in telecommunications companies (Korek Telecom, Asia Cell, Zain Iraq) operating in the Kurdistan Region-Iraq, by answering the following question: (How can empowering workers improve institutional performance in companies Communications operating in the Kurdistan region?), due to the importance of the study variables, its contents and dimensions, a sample of workers who occupy administrative and technical positions in the companies surveyed were selected as the study community, and their number is (400) workers, and the questionnaire was distributed to them, from which (378) forms were retrieved The qualitative approach was adopted to study the latent variables, and it was also relied on the quantitative approach in analyzing data and data using the statistical program (SPSS V26) and (AMOS V26)، The results of the study found that there was  statistically significant effect at the level of significance (α ≤ 0.05) to empower workers with its dimensions: (participation of information, freedom and independence), in improving the performance of workers. To ensure their success in performing their duties at work.
BREAST CANCER DETECTION WITH MACHINE LEARNING APPROACH
Authors: Olofintuyi Sunday Samuel
Published: May 2023

One of the most widespread diseases among women today is breast cancer. Early and accurate diagnosis is key in rehabilitation and treatment. The usage of mammograms has some uncertainties in the detection rate. To develop tools for physicians for effective and early detection and diagnosis, machine learning techniques can be adopted. The introduction of Machine Learning (ML) in developing the tool will increase the survival rate of patients with breast cancer. This research work proposed different six ML techniques; Logistic Regression, Linear Discriminant Analysis, Decision Tree (DT), KNN, Naïve Bayes (NB), and Support Vector Machine (SVM), and then recommended the model with the highest accuracy for breast cancer detection. The experiment was carried out in a python environment and all the aforementioned techniques were validated with Wisconsin Breast Cancer dataset and evaluated with accuracy, precision, and recall.
Embracing Ignorance and Failure Promotes Research Excellence
Authors: Dery Hanna , Holland Chase , Baker Jessica
Published: May 2023

Pursuing research as an undergraduate student deepens and enhances both your college experience and your post college plans. Whether someone hopes to go to graduate school, medical school, or into the workforce, the lessons you learn during a research project will further your abilities and potential. In this essay, we reflect on four lessons that we learned during our first full-time nine-week research project: (1) Do it, (2) Learn to thrive at the interface of knowledge and ignorance, (3) Embrace failure, and (4) Build confidence for the future. We use our experiences to identify key areas of growth, both personal and professional, that we gained as we moved from class-based students to researchers exploring at the edge of current knowledge.
Effects of Vermicompost and Beneficial Microbes on Biomass and Nutrient Density in Purple Lady Bok Choy (Brassica rapa var. chinensis) in A Vertical Hydroponic Grow Tower System
Authors: Pearson Chelsea , Gawel Rochelle , Maki Donna
Published: May 2023

Indoor food production in vertical hydroponic systems can be done year-round in any climate, has less negative environmental impacts compared to industrial agriculture and is a way of increasing the nutritional value of crops. Indoor hydroponic systems make it easy to control the precision of additives and amendments, such as fertilizers and vermicompost tea, to nutrient solution reservoirs. Vermicompost tea is known to contain beneficial microorganisms and can help increase the biomass, nutrient density, and overall health of the plants. Microorganisms and plants have co-evolved and is an essential relationship that deserves recognition and further research. The goal of the research presented in this paper was to better understand if vermicompost tea and its associated microorganisms, such as bacteria, fungi, nematodes, and protozoa, would increase biomass and nutrient density of Purple Lady Bok Choy (Brassica rapa var. chinensis) in vertical hydroponic systems. Statistical analyses were performed to compare the biomass and macro- and micronutrients of three different treatments to one another and a control. There was a significant difference between the mean leaf and root biomass among varying concentrations of vermicompost tea solutions and added inorganic hydroponic fertilizer. The nutrient density for both macro- and micronutrients also differed significantly due to different concentrations of vermicompost tea, suggesting that beneficial microbes may help plants uptake and absorb nutrients in a more efficient manner depending on the concentration of vermicompost tea and hydroponic fertilizer.
Ameliorating the Special Education Teacher Crisis: Systems Thinking and Innovative Approaches
Authors: Rock Marcia , Dieker Lisa , Billingsley Bonnie , Timara Davis , Cartagena Sacha , Lannan Amanda , Romualdo Annette
Published: May 2023

Chronic and pervasive special education teacher (SET) shortages have interfered with state, district, and school efforts to recruit and retain effective teachers for students with disabilities. Unfortunately, these shortages have worsened post-pandemic due to early retirements, low unemployment rates, and career changes. The purpose of this article is to provide a systems thinking (ST) framework to help stakeholders consider the complex and interacting systems in which these shortages occur (i.e., teacher preparation, district and schools, society). We consider specific elements within these systems, their interconnections, with a focus on identifying steps and ideas stakeholders can use to understand contributors to the shortage crisis, while providing strategies and innovative ideas for greater sustainability. We also offer real examples of ST solutions used within teacher education programs, schools, and other professions. To further bolster ST, we conclude with examples of innovations outside of education with ideas to bridge these concepts into potential pathways to address SET shortages.
Telemedicine: A Natural Evolution of Obstetric and Gynaelogical health Care System of Bangladesh during COVID-19 Pandemic
Authors: Banik Mala
Published: May 2023

Background: The word Telemedicine literally translates to ‘healing at a distance’. Here remote diagnosis and treatment of patients is done by means of telecommunication technology. First published record of telemedicine is in the first half of the 20th century when ECG was transmitted over the telephone line. In Bangladesh telemedicine was not so popular as patients prefer face to face visit to a medical practitioner. But in Covid-19 Pandemic to prevent transmission and Lock down situation telemedicine becomes popular and emerges as a natural evolution of Obstetrics and Gynaecologic health care system in Bangladesh.

The Aim of the study: To see the outcome of patients taking telemedicine for their Obstetric and Gynaecologic problems. The reasons of seeking consultation through telemedicine are also studied.

Materials and Methods: This is a Cross sectional prospective study done during Lock down period in Bangladesh. Study period was 27th March to 20th May. Total 201 women got telemedicine service free of cost via sms, messenger, imo, whatsapp, email using smart phone were included in this study. The data was collected, edited and tabulated by hand tabulation. Calculation was done on scientific calculator.

Results: About 96.51% patients suffering from Obstetrics and Gynaecological diseases were cured by taking medicine, counselling and assurance through telemedicine. Majority of pregnant women(23.88%) sought telemedicine service for consultation about advice regarding diet, medicine, anxiety about ANC visits. 2.48% women were worried about Tetanus Toxoid vaccine.Women (.99%) suffering from Gynaecological diseases such as Fibroid uterus, Uterine Prolapse were seeking for operation.3.48% women suffereing from DUB and managed by medication . Only 3.48% patients were required to refer to Hospital for Emergency admission.

Conclusion: Telemedicine can’t give solution to all problems, but it definitely helps in managing women suffering from Obstetric and Gynaecological diseases at a large extent especially during awakward situation like Covid 19 pandemic.

Bangladesh J Obstet Gynaecol, 2021; Vol. 36(1): 23-27
Treinamento muscular inspiratório em crianças e adolescentes com condições crônicas de saúde: revisão integrativa da literatura
Authors: Cavalcanti Maria Eduarda Pinto , Pinto Junior Adalberto Rodrigues , Brito Aline Lima , Guedes Júnior Guilherme José de Azevedo , Figueirêdo Bárbara Bernardo
Published: May 2023

Introdução: O treinamento muscular inspiratório (TMI) é utilizado para ganho de força e/ou resistência muscular inspiratória. No entanto, em crianças e adolescentes com condições crônicas de saúde, os estudos são escassos, além de não haver consenso na literatura acerca da sua aplicação. Objetivo: Revisar a literatura a respeito da aplicação do TMI em crianças e adolescentes com condições crônicas de saúde. Método: Foi realizada uma revisão integrativa da literatura nas bases de dados PubMed, SciELO, Cochrane Library, PEDro, BVS e CAPES, selecionando ensaios clínicos publicados a partir de 2010, que aplicaram o TMI sem associação a outras técnicas de fisioterapia respiratória e com amostra composta por menores de 18 anos de idade com alguma morbidade. Resultados: Foram incluídos nesta revisão 4 estudos publicados entre 2010 e 2021, com amostras que variaram de 8 a 31 participantes, faixa etária de 5 a 18 anos, as quais apresentam doenças neurodegenerativas, neuromusculares, oncológicas ou pós- transplante de rim. Conclusão: O TMI se mostrou seguro e viável nos estudos revisados e parece ser eficaz para o fortalecimento muscular, melhora da capacidade funcional, função pulmonar e qualidade de vida nestas populações específicas. Contudo, foram encontrados poucos estudos com protocolos de TMI na população pediátrica, sendo necessário mais estudos com essa população especifica.
Transtornos depressivos e de ansiedade em estudantes do ensino médio
Authors: Santos Keylla Matos Rocha , Azevedo Raphael Alves , Lima Rosane Araújo Silva
Published: May 2023

A depressão e a ansiedade são patologias negligenciadas na adolescência pela sociedade, no entanto são uns dos maiores problemas de saúde mental no mundo. Os adolescentes, na maioria das vezes, adotam um comportamento defensivo com tendência ao isolamento, dificultando o diagnóstico precoce e o prognóstico da doença. Assim, objetiva-se com este estudo explorar os fatores associados a depressão e ansiedade em estudantes do ensino médio. Trata-se de uma revisão integrativa da literatura de modo que realizou uma busca no Portal de Periódicos CAPES no período entre fevereiro e março de 2023. Foram incluídos 6 artigos para a revisão integrativa. A prevalência dos transtornos é maior em mulheres devido a sintomatologia subjetiva, por exemplo preocupações excessivas com o corpo e a popularidade. Enquanto nos homens, as manifestações são uso excessivo de substâncias, agressividade e rebeldia. Como fator de risco para os sintomas depressivos encontra-se a relação conjugal conflituosa dos pais, ausência ou baixo nível de aspectos positivos na interação familiar e relacionamento afetivo/familiar. Além disso, os filhos de pais dependentes de álcool possuem maior risco de desenvolver transtornos mentais. Portanto, o adolescente vem apresentando maiores níveis de depressão e ansiedade de modo que os profissionais da saúde devem ser capacitados e treinados para identificarem esses indivíduos nas suas manifestações clínicas nos atendimentos.
Türkiye’nin Doğu Anadolu Bölgesi’nde Elazığ, Erzincan, Malatya ve Tunceli İllerinde Bulunan Afit parazitoiti Aphidiinae (Hymenoptera: Braconidae) Türleri
Authors: DEMİRHAN Gizem , ERDOĞAN Özlem
Published: May 2023

Bu araştırma 1982-2009 yılları arasında Doğu Anadolu Bölgesi’nin Elazığ, Erzincan, Malatya ve Tunceli illeri ve ilçelerindeki tarım ve tarım dışı alanlarındaki bitkiler üzerinde görülen Aphidiinae (Hymenoptera: Braconidae) türlerinin tespit edilmesi amacıyla yürütülmüştür. Örneklemeler Mayıs-Ağustos ayları arasında gerçekleştirilmiştir. Araştırmada 26 lokaliteden toplamda 121 örnek incelenmiş, 4 cinse ait (Aphidius Nees, 1819; Binodoxys Mackauer, 1960; Diaeretiella Starý, 1960; Praon Haliday, 1833) 13 tür saptanmıştır. Araştırmada tespit edilen türlerin 7’si Aphidius (Aphidius avenae Haliday, 1834; A. colemani Viereck, 1912; A. eadyi Starý, González & Hall, 1980; A. ervi Haliday, 1834; A. matricariae Haliday, 1834; A. microlophii Pennachio & Tremblay, 1987; A. urticae Haliday, 1834), 1’i Binodoxys (Binodoxys acalephae (Marshall, 1896)), 1’i Diaeretiella (Diaeretiella rapae (McIntosh, 1855)), 4’ü Praon (Praon barbatum Mackauer, 1967; P. nonveilleri Tomanović & Kavallieratos, 2003; P. volucre (Haliday, 1833); P. yomenae Takada,1968) cinsine aittir. Bu türlerden Praon barbatum Mackauer, 1967 türü Türkiye Aphidiinae faunası için yeni kayıttır. Araştırma bölgesinde ayırdedilebilen 5 habitatın hepsinde bulunan türlerin Aphidius ervi, A. matricariae, Praon barbatum olduğu, A. avenae türünün sadece bir habitatta bulunmasıyla habitat tercihleri bakımından en sınırlı tür olduğu tespit edilmiş, Tür sayısı bakımından ise bölgede otsu bitkiler, yonca tarlası ve meyve bahçesi habitatlarının sırasıyla en zengin habitatlar olarak yer aldığı belirlenmiştir. Tespit edilen türlerin Doğu Anadolu Bölgesi’ndeki illere göre sayısal dağılımları dikkate alındığında Elazığ ilinin 12 tür ile en fazla, Erzincan ilinin 3 tür ile en az tür ile temsil edilen il olduğu belirlenmiştir. Yapılan bu araştırmayla Doğu Anadolu Bölgesi Aphidiinae faunasına yeni türler ilave edilmiş, Türkiye Aphidiinae tür sayısı 65’ten 66’ya çıkarılmıştır.
Bağırsak Florasının Genel Sağlık ve Ağız Sağlığı Üzerine Olan Etkilerinin Değerlendirilmesi
Authors: GÜZEL YILDIRIM Büşra , AÇAR Doğa Naz , KASIMOĞLU Yelda
Published: May 2023

Bağırsak mikrobiyotası olarak da bilinen bağırsak florası; bakteri ve virüslerden, arkeler, protozoalar ve mantarlara kadar geniş bir yelpazede mikroorganizmaya ev sahipliği yapmaktadır. İnsan vücudunda 100 trilyondan fazla simbiyotik mikroorganizma ağız boşluğu, deri ve gastrointestinal sistemde kolonileşmektedir. Mikrobiyotanın %70'inden fazlası konak ile simbiyotik bir ilişki içinde gastrointestinal kanalda yaşamaktadır. Ağız boşluğu, insan vücuduna açılan birincil kapıdır ve 770'ten fazla bakteri türünü barındıran, bağırsaktan sonraki en büyük ve çeşitli mikrobiyotaya sahip vücut bölümüdür. İnsan bağırsağı mikrobiyotası; bağışıklık sisteminin gelişmesi, besin sindirimi, patojen mikroorganizmaların kolonizasyonuna karşı savunma ve nörodavranışsal işlevi etkileme dahil olmak üzere konak gelişimine ve konağın fizyolojik fonksiyonlarını sürdürmesine katkıda bulunmaktadır. Yaşamın erken dönemlerindeki mikrobiyota ve konak arasındaki etkileşimler ilerleyen dönemde sağlığı etkileyecek fizyolojik değişikliklerden sorumludur. Bağırsağın ve ağızdaki mikrobiyal toplulukların disbiyozisi otizm, astım, obezite, inflamatuar bağırsak hastalıkları gibi birçok otoimmün ve enflamatuar hastalık ile ilişkilidir ve immün sistemi, bilişsel fonksiyonları ve metabolizmayı etkileyebilmektedir. Mikrobiyotanın önemi göz önünde bulundurularak fekal ve oral mikrobiyota transplantasyonu bir tedavi seçeneği olarak değerlendirilmiştir. Bu derleme, ağız ve bağırsak florasının oluşumunu, oral mikrobiyota ve bağırsak mikrobiyotası arasındaki etkileşimi ve sistemik hastalıklar ile mikrobiyota arasındaki çift yönlü ilişkiyi ele almaktadır.
Evaluation of Tensile Strength of Sutures Used in Dentistry
Authors: ERCAL Pinar , ERTEN TAYŞİ Ayşegül , TAYŞİ Nuri Mert , ŞİŞMANOĞLU Soner
Published: May 2023

Aim: The aim of this study was to compare the mechanical properties of sutures used in dentistry according to different materials in vitro. Material and Methods: Eight 3-0 different absorbable and non-absorbable suture materials with 3-0 gauge (Polytetraflouroethylene, polypropylene, polyester, polyglactin 910, polyglycolic acid, poliglecaprone 25, polydioxanone, and silk) were compared in terms of mechanical strength. All sutures were tied with a simple suture technique. Each material contained 10 samples per group, with a total sample size of 80 specimens. Failure load was measured in N while elongation was measured in µm using a microtensile testing device. A one-way analysis of variance (ANOVA) was used to analyze the difference in failure loads and elongation values. Results: Polydioxanone was significantly more resistant to tensile forces among all tested materials (p
Çocuklarda Diş Renklenmeleri ve Tedavi Seçenekleri
Authors: YAZIR KAVAN Melis , GÜVEN Yeliz
Published: May 2023

Çocukluk ve ergenlik döneminde var olan estetik sorunlar psikososyal gelişim ile akran ilişkileri üzerinde önemli bir etkiye sahiptir. Çocukların ön dişlerinin tamamının veya bir kısmının şekil, boyut, renk ve yapısındaki anormalliklerin ise sorunlara yol açtığı bilinmektedir. Çalışmalarda 4-5 yaş grubundaki çocukların, değişen diş estetiğine ilişkin olumsuz sosyal algılara ve özlük algılarına sahip olabilecekleri belirtilmiştir. Diş renklenmeleri ise diş hekimliğinde sık görülen bir estetik sorundur ve son yıllarda diş beyazlatma isteğinde bulunan genç hasta popülasyonunun arttığı bildirilmektedir. Diş rengini, iç tabakalardaki renklerin kombinasyonu ve dişin dış yüzeyinde oluşan lekelerin varlığı belirlemektedir. İç tabakalardaki diş rengi, mine ile dentinin ışığı dağıtma ve absorbsiyon özelliklerine bağlı değişmektedir. Minenin translusent yapıda oluşu dentin tabakasının renginin diş yüzeyinde yansımasına neden olur ve dentinin optik özellikleri diş rengini belirlemede önemli rol oynar. Beyazlatma işlemi, lekenin fiziksel olarak çıkarılması veya diş renk tonun açılması için kimyasal bir reaksiyon gerçekleştirilmesidir. Beyazlatma kromojenlerin kimyasal yapısının bozulması olarak da tanımlanmaktadır. Diş beyazlatma tedavileri ile ilgili ilk uygulamaların tarihi çok eski yıllara dayanmaktadır. Ancak günümüzde gelişen teknoloji ile materyal çeşitliliği artmış, beyazlatma tedavilerinde kullanılan ajan içeriklerinde güncellemeler olmuştur. Bu makalede çocuklarda dişlerde renklenme nedenleri ve diş beyazlatma tedavilerinin çocuk diş hekimliğinde kullanım alanları güncel literatür bilgileri derlenerek sunulmuştur.
Rethinking the essence of management accounting in the context of achieving Sustainable Development Goals
Authors:   Vasyl Stefanyk Precarpathian National University, MAKSYMIV Yuliia , YAKUBIV Valentyna ,   Vasyl Stefanyk Precarpathian National University, PYLYPIV Nadia ,   Vasyl Stefanyk Precarpathian National University, PIATNYCHUK Iryna ,   Vasyl Stefanyk Precarpathian National University, HORYSLAVETS Pavlo ,   Lviv Polytechnic National University
Published: May 2023

Introduction. Achieving the Sustainable Development Goals (SDGs) within the framework defined by 2030 is possible only if the socially responsible behavior of citizens, businesses, and public administration bodies is activated in tandem. And business has the most significant role here. The role of management accounting in achieving SDGs has practical dimensions and a strategic task arises to form such accounting and analytical information that can help in achieving the 17 SDGs. Such information should be public, i.e. presented not only to internal stakeholders, but also to external ones, and also show both positive and negative impacts of business on the community and the country within which it operates. Problem Statement. Since there is an objective need to consume accounting and analytical information of a strategic nature in the context of SDGs to meet information needs of various groups of stakeholders, it is worth talking about expanding the traditional understanding of the essence of management accounting (that is, in its legislative definition). Purpose. Rethinking the essence of management accounting in the context of its role in achieving SDGs and making proposals for improving the legally established definition of the term “management accounting” in Ukraine. Methods. General scientific and special methods are used, such as logical analysis, synthesis, comparison, theoretical generalization, and abstract-logical. Results. The conducted analysis of the role of management accounting in achieving SDGs casts doubt on the generally accepted statement that management accounting forms information only for internal users. The article presents arguments that prove the need to amend the Law of Ukraine “On Accounting and Financial Reporting in Ukraine”. The definition of management accounting is proposed, which, taking into account the potential of accounting tools in achieving SDGs, can provide modern information needs of stakeholders motivated by socially responsible behavior. Namely, management accounting should be interpreted as a system of collecting, processing, preparing, and analyzing financial and non-financial information about company's activities for various groups of stakeholders in the process of making management decisions. Conclusions. The clarity in the theoretical aspect regarding the interpretation of the essence of management accounting and confirmation of this in normative legal acts will be an impetus for expanding the practical implementation of management accounting in solving the problems of sustainable development.
2021-2022 eJobs Report: the Political Science Job Market
Authors: McGrath Erin , Diaz Ana
Published: May 2023

In 2021-2022, no significant correction occurred regarding the number of job openings to pre-pandemic job market levels. Since 2018-2019, the number of postings has declined, a trend carrying across months, geographic locations, subfields, and position ranks. Job postings decreased in nearly every US region, with the largest declines observed in the Northeast and the Midwest. Along with the Western region, these regions also contain the most jobs. Increased breadth/ diversity of the subfields designated in job postings could indicate employers are trying to capture more candidates with broader job descriptions in a tighter labor market. However, this may result in confusion or inefficiencies (failed and repeated years-long searches). As in other STEM fields, it is prudent for recent graduates with doctoral degrees in political science to broaden their transferable skills and widen their career outlooks beyond academic jobs simply because there are not enough academic positions for PhDs earned.
Realising the social value of impermanent carbon credits
Authors: Balmford Andrew , Keshav Srinivasan , Venmans Frank , Coomes David , Groom Ben , Madhavapeddy Anil , Swinfield Thomas
Published: May 2023

Efforts to avert dangerous climate change by conserving and restoring natural habitats are hampered by widespread concerns over the credibility of methods used to quantify their net long-term benefits. We develop a novel, flexible framework for estimating the long-run social benefit of impermanent carbon credits generated by nature-based interventions which integrates three substantial advances: the conceptualisation of the permanence of a project’s impact as its additionality over time (relative to a statistically-derived counterfactual); the risk-averse estimation of the social cost of future reversals of carbon gains; and the deployment of post-credit monitoring to correct for errors in deliberately pessimistic release forecasts. Our framework generates incentives for safeguarding already-credited carbon while enabling would-be investors to make like-for-like comparisons of diverse carbon projects. Preliminary comparisons suggest that after fully adjusting for the impermanence of their effects, nature-based interventions may offer less costly ways of reducing climate damages than more technological solutions.
Linköping University’s Participation in Horizon 2020 : The European Framework Programme for Research and Innovation 2014–2020
Authors:   LiU Grants and Program Offices, Linköping University, Linköping, Sweden
Published: May 2023

HORIZON 2020 was the European Commission’s Framework Programme for Research and Innovation between 2014 and 2020. With a budget of nearly €80 billion, it was the largest financial instrument for research and innovation ever in the European Union. Its predecessor, the 7th Framework Programme for Research and Technological Development (FP7), for the period 2007–2013, had a budget of just over €50 billion. The political goal behind Horizon 2020 was to ensure that Europe produces world-class science and technology that drives economic growth. The framework programme was built around three main programme sections, known as Pillars, complemented by other work programmes, including the Joint Research Centre, the Euratom Programme and the Public-Private Partnerships.
ENTREVISTA COM ALAN SCHOENFELD SOBRE RESOLUÇÃO DE PROBLEMAS
Authors: Justulin Andresa Maria , Proença Marcelo Carlos de
Published: May 2023

Não se aplica
(RE)FORMULANDO E RESOLVENDO PROBLEMAS COM O USO DE TECNOLOGIAS DIGITAIS NA FORMAÇÃO INICIAL DE PROFESSORES DE MATEMÁTICA
Authors: Figueiredo Fabiane Fischer , Oliveira Groenwald Claudia Lisete
Published: May 2023

: Neste artigo apresentam-se os resultados de uma investigação qualitativa, cujo objetivo foi investigar quais são os conhecimentos produzidos por futuros professores de Matemática, nos aspectos matemáticos, metodológicos, tecnológicos e acerca da abordagem de temas de relevância social, por meio da (re)formulação e resolução de problemas abertos. As atividades foram propostas de modo que os futuros professores adquirissem a experiência de (re)formular e resolver um problema norteador do tipo aberto, bem como discutissem e refletissem sobre a mesma e acerca do enunciado, que é obtido de um Design de problemas. Os resultados apontam que um grupo, formado por três futuras professoras de Matemática, tiveram a oportunidade de trabalhar colaborativamente, o que contribuiu para que (re)construíssem as suas concepções acerca do Design de problemas abertos, das atividades de (re)formulação e resolução de problemas, com o uso de Tecnologias Digitais, e da abordagem de temas de relevância social, para a discussão, reflexão crítica e produção de conhecimentos.
O PROCESSO FORMATIVO DE FUTUROS PROFESSORES DE MATEMÁTICA SOBRE PROBLEMA E EXERCÍCIO
Authors: Mendes Luiz Otavio Rodrigues , Carlos de Proença Marcelo
Published: May 2023

Este estudo tem o objetivo de investigar e analisar os aspectos que emergem na construção do conceito de problema e exercício durante um processo formativo de Licenciandos em Matemática. Para tanto, 13 licenciandos de uma universidade pública participaram da pesquisa. Os dados foram coletados no contexto formativo ao Ensino-Aprendizagem de Matemática via Resolução de Problemas, utilizando de questionário, diário de campo, áudio e vídeo, sendo analisados de forma qualitativa e descritiva. Os resultados revelam que as principais categorias que designaram o conceito de problema dos licenciandos foram, inicialmente: dificuldade, estratégia e conhecimento prévio. Durante a formação, surgiu a categoria contexto. Do conhecimento prévio, inclui-se a categoria nível de conhecimento. A categoria estratégia acabou não prevalecendo na designação dos licenciandos. Para o conceito de exercício, os acadêmicos apresentaram, inicialmente, as categorias fórmula e regra conhecida. Durante a formação, puderam adicionar a categoria atividade repetitiva que, apesar de não estar presente em definições abordadas na literatura, é característico de um processo de ensino pautado na resolução de exercícios. Assim, este estudo revela a importância de favorecer a compreensão a respeito de problema/exercício para se trabalhar com a resolução de problema, quando o foco é o uso do problema como ponto de partida
PROBLEMAS MATEMÁTICOS DO CAMPO CONCEITUAL MULTIPLICATIVO NOS LIVROS DIDÁTICOS DO 1º AO 3º ANO DO ENSINO FUNDAMENTAL
Authors: Silva Jéssica Daiane da , Agranionh Neila Tonin , Hilger Thais Rafaela
Published: May 2023

O presente artigo é resultado de uma pesquisa de mestrado e objetiva verificar a abrangência do Campo Conceitual Multiplicativo em duas coleções de livros didáticos, a partir da identificação e da classificação das situações multiplicativas presentes nessas obras, tendo como fundamentação teoria a “Teoria dos Campos Conceituais” de Gèrard Vergnaud. Trata-se, portanto, de pesquisa qualitativa de cunho documental. Foram analisadas duas coleções de materiais didáticos do 1º, 2º e 3º ano do Ensino Fundamental, totalizando seis livros. A análise foi realizada pela técnica de análise de conteúdo. Foi possível verificar que: a quantidade de situações referentes ao Campo Conceitual Multiplicativo aumenta com o avanço nos anos escolares; as situações de multiplicação são exploradas em maior número em comparação às situações de divisão; a primeira coleção (A) explora mais situações de problemas verbais, enquanto a segunda (Coleção B) apresenta mais situações classificadas como exercícios; problemas do eixo “Proporção Simples” um para muitos - são priorizados em ambas as coleções.
RESOLUÇÃO DE PROBLEMAS E REPRESENTAÇÕES SEMIÓTICAS: UMA EXPERIÊNCIA NUMA ESCOLA PÚBLICA PAULISTA
Authors: Prado Marilia , Jahn Ana Paula
Published: May 2023

Este artigo traz um recorte de uma dissertação de mestrado cujo objetivo principal foi investigar de que maneira práticas de Resolução de Problemas podem ser implementadas na sala de aula e como são vivenciadas pelos estudantes, com ênfase no papel das diferentes representações semióticas em seus processos de resolução. Para tanto, realizou-se uma experiência com turmas de 1ª série do Ensino Médio de uma escola pública da cidade de São Paulo, inspirada na competição internacional Rali Matemático Transalpino. A estratégia metodológica envolveu um estudo experimental de intervenção, organizado em três fases, cuja análise dos dados produzidos foi de natureza qualitativa, à luz das pesquisas na área, bem como da teoria dos registros de representação semiótica de Raymond Duval. A análise dos dados produzidos mostrou que os alunos vivenciaram a experiência como participantes ativos nos processos de resolução dos problemas e, por meio das discussões realizadas, reconheceram a importância da mobilização de diferentes representações como auxiliares no desenvolvimento das resoluções, ainda que tenham apresentado dificuldades em atividades de conversão do registro numérico tabular para o registro simbólico-algébrico.
Agro-morphological and biochemical responses of quinoa (Chenopodium quinoa Willd. var: ICBA-Q5) to organic amendments under various salinity conditions
Authors: El Mouttaqi Ayoub , Sabraoui Talal , Belcaid Mohamed , Ibourki Mohamed , Mnaouer Ihssane , Lazaar Karima , Sehbaoui Faissal , Ait Elhaj Reda , Khaldi Manal , Rafik Sifeddine , Zim Jamaâ , Nilahyane Abdelaziz , Ghoulam Cherki , Devkota Krishna Prasad , Kouisni Lamfeddal , Hirich Abdelaziz
Published: May 2023

In the Sahara Desert, due to drought and salinity and poor soil fertility, very limited crop choice is available for the farmers to grow crops. Quinoa (Chenopodium quinoaWilld.) has shown promising under such conditions in the South of Morocco, a true representative site of Sahara Desert. Soil organic amendments have the potential to minimize negative effects of soil salinity and improve crop production. Thus, this study aimed to elucidate the impact of nine organic amendments on quinoa (var. ICBA-Q5) growth, productivity, and biochemical parameters under saline irrigation water application (4, 12, and 20 dS·m-1). Results of the experiment indicate a significant effect of organic amendments on major agro-morphological and productivity parameters. Biomass and seed yield tends to decrease with the rise of salinity level, and organic amendments have improved productivity compared to the non-treated control. However, salinity stress alleviation was assessed by determining pigments concentration, proline content, phenolic compounds, and antioxidant activity. Therefore, the action of organic amendments varies from one level of salinity to another. Furthermore, a remarkably significant decrease in total saponin content was reached due to the application of amendments even at high saline conditions (20 dS·m-1). The results demonstrate the possibility of enhancing the productivity of quinoa as an alternative food crop under salinity conditions by using organic amendments and improving the quality of grains (saponin reduction) during the pre-industrialization process.
Polyploid Nicotiana section Suaveolentes originated by hybridization of two ancestral Nicotiana clades
Authors: D’Andrea Lucio , Sierro Nicolas , Ouadi Sonia , Hasing Tomas , Rinaldi Elijah , Ivanov Nikolai V. , Bombarely Aureliano
Published: May 2023

Introduction

Nicotiana section Suaveolentes is an almost all-Australian clade of allopolyploid tobacco species that emerged through hybridization between diploid relatives of the genus. In this study, we aimed to assess the phylogenetic relationship of the Suaveolentes section with several Nicotiana diploid species based on both plastidial and nuclear genes.

Methods

The Nicotiana plastome-based phylogenetic analysis representing 47 newly re-built plastid genomes suggested that an ancestor of N. section Noctiflorae is the most likely maternal donor of the Suaveolentes clade. Nevertheless, we found clear evidence of plastid recombination with an ancestor from the Sylvestres clade. We analyzed 411 maximum likelihood-based phylogenetic trees from a set of conserved nuclear diploid single copy gene families following an approach that assessed the genomic origin of each homeolog.

Results

We found that Nicotiana section Suaveolentes is monophyletic with contributions from the sections Alatae, Sylvestres, Petunioides and Noctiflorae. The dating of the divergence between these sections indicates that the Suaveolentes hybridization predates the split between Alatae/Sylvestres, and Noctiflorae/Petunioides.

Discussion

We propose that Nicotiana section Suaveolentes arose from the hybridization of two ancestral species from which the Noctiflorae/Petunioides and Alatae/Sylvestres sections are derived, with Noctiflorae the maternal parent. This study is a good example in which the use of genome wide data provided additional evidence about the origin of a complex polyploid clade.
System Design, Analysis, and Control of an Intelligent Vehicle for Transportation in Greenhouse
Authors: Wu Changjie , Tang Xiaolong , Xu Xiaoyan
Published: May 2023

Smart agriculture represents a significant trend in agricultural development, given its potential to enhance operational efficiency and reduce labor intensity. Despite the adoption of modern greenhouse technologies, such as sensors and automation systems, crop transportation is still largely achieved through manual labor, largely due to the complex environment and narrow terrain of greenhouses. To address this challenge, this work proposes the design of an intelligent vehicle that is capable of transporting crops in a commercial greenhouse, with the aim of improving operational efficiency and reducing labor intensity. To enable the vehicle to navigate the horizontal and rail surfaces within the greenhouse, a novel chassis structure is designed that is capable of simultaneous driving on both ground and rail surfaces. Additionally, the two-dimensional codes is adopted for positioning and navigation, thereby avoiding the need to modify existing greenhouse road surfaces. Through the implementation of a comprehensive system-control strategy, the intelligent vehicle realized various functions, including ground driving, rail driving, moving up and down the rail, and automatic rail changing. Experimental results demonstrate that the designed intelligent vehicle successfully meets the basic requirements for crop transportation in a greenhouse, providing a solid foundation for future unmanned operations.
Attention Mechanism and Support Vector Machine for Image-Based E-Mail Spam Filtering
Authors: Hnini Ghizlane , Riffi Jamal , Mahraz Mohamed Adnane , Yahyaouy Ali , Tairi Hamid
Published: May 2023

Spammers have created a new kind of electronic mail (e-mail) called image-based spam to bypass text-based spam filters. Unfortunately, these images contain harmful links that can infect the user’s computer system and take a long time to be deleted, which can hamper users’ productivity and security. In this paper, a hybrid deep neural network architecture is suggested to address this problem. It is based on the convolution neural network (CNN), which has been enhanced with the convolutional block attention module (CBAM). Initially, CNN enhanced with CBAM is used to extract the most crucial information from each image-based e-mail. Then, the generated feature vectors are fed to the support vector machine (SVM) model to classify them as either spam or ham. Four datasets—including Image Spam Hunter (ISH), Annadatha, Chavda Approach 1, and Chavda Approach 2—are used in the experiments. The obtained results demonstrated that in terms of accuracy, our model exceeds the existing state-of-the-art methods.
Developmental Pattern Formation: Spanish Contributions from a Biophysical Perspective
Authors: Buceta Javier , Guitou Léna
Published: May 2023

During the last few decades, developmental pattern formation has evolved from being a descriptive discipline to a quantitative one. That process has been possible due to the implementation of multidisciplinary approaches where biophysicists and mathematicians have played a key role. In this review, we highlight relevant Spanish contributions and stress their biophysical approaches, as well as provide some historical context. Finally, this work also aimed at bridging the concepts from biology to physics/math (and back) and at shedding light on some directions for future research.
Feasibility Study on the Effect of FRP Shear Reinforcements on the Behaviour of FRP-Reinforced Concrete Deep Beams
Authors: Latosh Fawzi , Al-Sakkaf Abobakr , Bagchi Ashutosh
Published: May 2023

Unlike steel reinforcements in concrete, Fiber Reinforced Polymer (FRP) materials are light and free from corrosion. Therefore, FRP materials are increasingly being used in structural engineering as a replacement for steel reinforcements. While the use of FRP bars as longitudinal reinforcements in concrete deep beams has been studied somewhat widely, their use and effectiveness as web reinforcements are not well studied. In this study, the effect of the FRP web reinforcements on the behaviour and strength of FRP-reinforced concrete deep beams were investigated in an experimental study. Four glass fiber-reinforced concrete (RC) simply supported deep beam specimens were tested under a concentrated load with different shear span-to-depth ratios and web reinforcement ratios. The behaviour of the deep beams was described in terms of load–deflection behaviour, crack developments, strain in FRP reinforcements, and failure modes. The experimental investigation emphasized the significance of web reinforcements in determining the reinforced concrete deep beam behaviour, such as mid-span deflection, crack breadth, failure modes, and ultimate strengths. Furthermore, to predict the behavior of deep beams, numerical Finite Element models using Abaqus software were created. The present test results were compared to those predicted using the Finite Element models. This investigation shows that web reinforcement is quite important for FRP-RC deep beams to achieve a robust behaviour by enhancing its capacity and deformability.
The Influence of Pressure on Local Heat Transfer Rate under the Vapor Bubbles during Pool Boiling
Authors: Serdyukov Vladimir , Malakhov Ivan , Surtaev Anton
Published: May 2023

This paper presents the results of an experimental study on the evolution of a nonstationary temperature field during ethanol pool boiling in a pressure range of 12–101.2 kPa. Experimental data were obtained using infrared thermography with high temporal and spatial resolutions, which made it possible to reconstruct the distribution of the heat flux density and to study the influence of pressure reduction on the local heat transfer rate in the vicinity of the triple contact line under vapor bubbles for the first time. It is shown that, for all studied pressures, a significant heat flux density is removed from the heating surface due to microlayer evaporation, which exceeds the input heat power by a factor of 3.3–27.7, depending on the pressure. Meanwhile, the heat transfer rate in the area of the microlayer evaporation significantly decreases with the pressure reduction. In particular, the local heat flux density averaged over the microlayer area decreases by four times as the pressure decreases from 101.3 kPa to 12 kPa. Estimates of the microlayer profile based on the heat conduction equation were made, which showed the significant increase in the microlayer thickness with the pressure reduction.
Advances in Climatic Form Finding in Architecture and Urban Design
Authors: De Luca Francesco
Published: May 2023

Researchers, architects and planners are increasingly urged to develop and apply sustainable methods and solutions to reduce the impact of the built environment on climate, adapt cities to climate change and reduce or eliminate resource depletion and building-related carbon emissions. In recent years, taking advantage of state-of-the-art computational and environmental design tools, researchers and designers are developing new digital workflows, methods and solutions to investigate climate-optimal and performative buildings and urban forms. This perspective paper analyses state-of-the-art computational methods; form generation processes; and tools, criteria and workflows that present how these are integrated into climatic form finding, allowing the improvement of building and urban environmental performances. Additionally, current challenges and future directions are presented.
Seismic Monitoring at the Farnsworth CO2-EOR Field Using Time-Lapse Elastic-Waveform Inversion of 3D-3C VSP Data
Authors: Liu Xuejian , Huang Lianjie , Gao Kai , Bratton Tom , El-Kaseeh George , Ampomah William , Will Robert , Czoski Paige , Cather Martha , Balch Robert , McPherson Brian
Published: May 2023

During the Development Phase of the U.S. Southwest Regional Partnership on Carbon Sequestration, supercritical CO2 was continuously injected into the deep oil-bearing Morrow B formation of the Farnsworth Unit in Texas for Enhanced Oil Recovery (EOR). The project injected approximately 94 kilotons of CO2 to study geologic carbon storage during CO2-EOR. A three-dimensional (3D) surface seismic dataset was acquired in 2013 to characterize the subsurface structures of the Farnsworth site. Following this data acquisition, the baseline and three time-lapse three-dimensional three-component (3D-3C) vertical seismic profiling (VSP) data were acquired at a narrower surface area surrounding the CO2 injection and oil/gas production wells between 2014 and 2017 for monitoring CO2 injection and migration. With these VSP datasets, we inverted for subsurface velocity models to quantitatively monitor the CO2 plume within the Morrow B formation. We first built 1D initial P-wave (Vp) and S-wave (Vs) velocity models by upscaling the sonic logs. We improved the deep region of the Vp and Vs models by incorporating the deep part of a migration velocity model derived from the 3D surface seismic data. We improved the shallow region of 3D Vp and Vs models using 3D traveltime tomography of first arrivals of VSP downgoing waves. We further improved the 3D baseline velocity models using elastic-waveform inversion (EWI) of the 3D baseline VSP upgoing data. Our advanced EWI method employs alternative tomographic and conventional gradients and total-variation-based regularization to ensure the high-fidelity updates of the 3D baseline Vp and Vs models. We then sequentially applied our 3D EWI method to the three time-lapse datasets to invert for spatiotemporal changes of Vp and Vs in the reservoir. Our inversion results reveal the volumetric changes of the time-lapse Vp and Vs models and show the evolution of the CO2 plume from the CO2 injection well to the oil/gas production wells.
Design of an Experimental Approach for Characterization and Performance Analysis of High-Frequency Transformer Core Materials
Authors: van Niekerk Daniel , Schoombie Brydon , Bokoro Pitshou
Published: May 2023

High-frequency transformer core materials are used in power converter applications due to high efficiency performance. Their volume and weight can be reduced when higher operating frequencies are used but at the expense of an increase in core material losses. Some studies analyzed transformer core material performance by using finite element method (FEM) analysis, while others used an experimental model. This study proposes an experimental approach to compare the high-frequency transformer efficiency performance of different core material types. In this way, newly produced core material performance can be rapidly analyzed by comparing it against a known core material type, thereby resulting in the fast identification of improved core material design. This empirical approach makes use of a standard half-bridge inverter topology to enable an analysis of high-frequency transformer core material efficiency performance. Actual voltage and current measurements are used to determine the efficiency and output power performance throughout a specified constant current load range at different switching frequencies. Initially commercial standard polycrystalline or ferrite E-core materials were used to validate the characterization jig performance measured curve trends. The usefulness of the jig is then demonstrated by comparatively analyzing and then verifying the expected performance difference between polycrystalline and nanocrystalline toroidal core materials.
Smoke Movement and Control in Tunnels under Construction: Recent Research Progress and Future Directions
Authors: Yao Yongzheng , Xia Ziyang , Wang Rui , Ren Fei , Gao Zihe , Zhao Jinlong , Wang Qiang
Published: May 2023

China is the country with the largest number of tunnels, the largest tunnel construction scale, and the fastest development of tunnels in the world [...]