bluuebunny/crossref_metadata_2025 huggingface dataset:
Machine Learning Approach to Predictive Maintenance in Manufacturing Industry - A Comparative Study
Authors: P Karrupusamy
Published: January 2021

Predictive maintenance is the way to improve asset management in every manufacturing industry. While handling advance costlier machinery in the industry, the predictive maintenance knowledge will be essential to protect the machinery before gets degradation performance. Recently, the emergence of business in manufacturing industry deals with good systems, regular intervals maintenance process, predictive maintenance (PdM), machine learning (ML) approaches are extensively applied for handling the health standing of business instrumentation. Now the digital transformation towards I4.0, data techniques, processed management and communication networks; it’s doable to gather huge amounts of operational and processes conditions information generated type many items of kit and harvest information for creating an automatic fault detection and diagnosing with the aim to attenuate period of time and increase utilization rate of the parts and increase their remaining helpful lives. The predictive maintenance is inevitable for property good producing in I40. This paper aims to provide a comprehensive review of the recent advancements of metric capacity unit techniques wide applied to PdM for good producing in I4.0 by classifying the analysis consistent with metric capacity unit algorithms, ML class, machinery and instrumentation used device employed in information acquisition, classification of knowledge size and kind, and highlight the key contributions of the researchers and so offers pointers and foundation for additional analysis. In this research paper we constructed a Random Forest model to predict the failure of the various machine in manufacturing industry. It compares the prediction result with Decision Tree (DT) algorithm and proves its superiority in accuracy and precision.
Systematization of perioperative nursing care in the surgical center: a report of experience
Authors: Sauer A. G. , Pasquetti D. , Kwiatkowiski H. S. , Pinheiro L. J. , Aguiar D. C. M. , Moser G. A. S. , Hanauer M. C.
Published: January 2021

Objective: To report the experience that academics had when performing SAEP in the intraoperative period. Method: This is an experience report that undergraduate Nursing students had when performing the Systematization of Perioperative Nursing Care (SAEP) in a hospital in the western region of Santa Catarina. Results: The Surgical Center is characterized as a differentiated environment, with particular dynamics that require tools to provide quality perioperative care, planned and humanized. For this, SAEP presents itself to assist in the development of effective care, covering all the needs of the patient. Although the implementation of SAEP is essential, in the hospital of the experiences its implementation has not yet occurred, in addition there was a deficit in creating the bond between professionals and patients, essential for the development of humanized care. Conclusion: With the implementation of SAEP, it was realized in practice the importance of its use, as it enables the prevention of complications, comprehensive care, human and recognized.
Evaluation of smartphone applications for measuring the total height of trees
Authors: Oliveira J. M. D. , Oliveira J. P. M. D. , Cardoso L. S. , Ataíde D. H. S. , Curto R. A. , Araújo E. J. G.
Published: January 2021

The objective of this study was to evaluate the precision and accuracy of smartphone applications for measuring the total height of trees. We measured the heights of 90 trees of different species on the campus of the Federal Rural University of Rio de Janeiro in Seropédica, equally distributed in three height classes: (1) h ≤ 11.5 m; (2) 11.5 <h < 20 m; and (3) h ≥ 20 m. The heights measured by the Vertex III® hypsometer was the reference for the comparison of the tested applications: Measure Height (MH and MDH), Hypsometer (HYP), Simple Measure (SM), Height Calculator (HC), Smart Tools (ST), Height and Distance (HD), Two Point Height (TPH and TPH2) and Tree Meter (TM) using the MOTO G5 smartphone. For data analysis, we performed an F (α = 0,05) test, and if there is a significant difference Dunnett's mean test (α = 0,05) was applied, and height variation coefficients (CV%) were analyzed for all applications used. Then, we carried out the graphical analysis of the differences and the statistical parameters of Bias (V), Mean of Absolute Differences (MD), Standard Deviation of Differences (DPD), ending with the performance index (c). We concluded that the applications Height Calculator (HC), Smart Tools (ST) and, Two Point Height, (TPH) present greater precision and accuracy in the measurement of the total height of the trees. However, we observed that increasing the height of the trees, reduces the performance of the applications, mainly using the Simple Measure (SM) and Height and Distance (HD) applications. The Tree Meter (TM) can be used on trees smaller than 20 m in total height. Measure Height (MH and MDH) and Hypsometer (HYP) applications have low precision and accuracy in estimates.
Nitrogen and boron fertilization in cauliflower
Authors: Bonetti J. A. , Fernandes S. O. , Zanuzo M. R. , Lange A. , Machado R. A. F.
Published: January 2021

Nitrogen and boron participate concurrently in the growth and development process of plants by changing   cell division processes. Therefore, the aim of this study was to evaluate the influence of sources and doses of nitrogen, associated with boron doses and sulfur on the yield and quality aspects of Verona CMS cauliflower. The experimental design was set up under split plot design in randomized blocks, with 3 replicates. The treatments in the plot were sources of ammonium sulphate (NH4)2SO4) and calcium nitrate (Ca(NO3)2) x doses of nitrogen, being 125, 150, 175 and 200 kg ha-1 on topdressing system and in the subplot doses of boron (0, 2, 4 and 6 kg ha-1). The fresh curd mass, curd and stem diameter, total and commercial yield, besides the contents of nitrogen, boron and sulfur in the leaf and curd, were evaluated. The sources and doses of nitrogen and the doses of boron did not influence the fresh curd mass, stem diameter and the total yield of 'Verona CMS' cauliflower. Enhancing doses of Ca(NO3)2 increased curd diameter, however in combination with boron doses there was antagonism effect on curd development. The contents of nitrogen and boron in the leaf were influenced by the fertilization of nitrogen and boron, respectively, when the calcium nitrate source was used.
GESTÃO PÚBLICA ESCOLAR E O ESTRESSE OCUPACIONAL NO CONTEXTO DA PANDEMIA DA COVID-19 EM CEILÂNDIA-DF
Authors: Araujo Giovana Alves de Souza
Published: January 2021

Este trabalho teve como objetivo identificar o estresse ocupacional advindo da pandemia da COVID-19 em diretores e vice-diretores de escolas públicas de ensino médio da Região Administrativa de Ceilândia, no Distrito Federal. Os objetivos específicos são identificar: as demandas ocupacionais desses gestores; os principais causadores de estresse enfrentados por esses gestores; e como as atividades de gestão pública escolar foram impactadas com o surgimento da pandemia da COVID-19. Devido à necessidade de distanciamento social, a coleta de dados foi por meio da aplicação de questionário, com abordagem qualitativa, baseado no Modelo Teórico de Explicação do Estresse Ocupacional em Gerentes, desenvolvido por Zille (2005), com questões adaptadas. A análise apresenta a percepção dos gestores sobre a intensificação do trabalho no contexto de pandemia da COVID-19. Foram identificados como principais fatores relacionados ao estresse: a articulação da Secretaria de Educação; o excesso de demandas; e a utilização e acesso a tecnologias por toda a comunidade escolar. Os resultados e discussões poderão servir de base para políticas públicas sobre o tema.
Sandarac resin to preserve cadavers and histology specimens: A pilot study
Authors: Abdulwahab Alahmari
Published: January 2021

Introduction: For the past years, there has been a lot of preserving techniques for human cadavers and histology specimens as well as human remains. But little did we know that some of these methods are unsafe, unpractical and/or expensive.

Aim: The aim of this paper is to propose a new or alternative method and technique that can help in preserving the said specimens. Moreover, the new technique will be more efficient, practical, safe and affordable. Given the resources are readily available when needed.

Methods: This method takes a piece of animal muscular tissue to preserve it as a preserved part and preserve a histology with the same technique to evaluate any form of tissue decomposition.

Results: As a result of this experiment, the piece of animal muscular tissue was preserved by this method for 1 year. The histology specimen was preserved successfully and it looks identical to the tissue that is preserved by formalin.

Keywords: Sandarac resin; Preservation method; Cadaver; Histology; Tissue decomposition
Antena UHF multifuncional del tipo fractal microstrip basada en la alfombra de Sierpinski
Authors: Lupera Morillo Pablo , Flores Gary , Montaluisa Amanda
Published: January 2021

The use of multifunctional devices increases day by day. Mentioned devices, as smart tv, need appropriate and unified antennas which can meet required frequencies. Therefore, in this paper, a Sierpinski carpet microstrip fractal antenna in the second iteration is designed and fabricated for Digital Tv in UHF band and wireless wideband networks. It was verified that that the design of a fractal antenna based on the Sierpinski carpet is possible from a rectangular patch on iteration 0; however, it must be taken into account that the patch design must be carried out at a specific resonance frequency. Simulation is carried out using ADS simulator, and it was verified using a vector network analyzer. The proposed fractal antenna operates in the UHF digital TV range from 470 MHz to 683 MHz and in the 2.45 GHz to 2.4835 GHz range of broadband wireless local area network.
Modelos de canal de desvanecimiento para comunicaciones Millimeter-Wave
Authors: Vega Sánchez José David , Urquiza-Aguiar Luis , Paredes Paredes Martha Cecilia
Published: January 2021

A realistic performance assessment of any wireless communication system requires the use of a fading channel model that reflects its main characteristics. The traditional Rayleigh and Nakagami-m models have been (and still are) the basis of most theoretical research on wireless technologies today, even for emerging technologies, such as millimeter-wave communications (mm-Wave). In this article, through the use of the mean square error statistical test, we show that the FMR and κ-μ shadowed models fit better to field measurements in outdoor environments at 28 GHz than the conventional channel models. Therefore, these generalized models are introduced as a physically feasible alternative that can be used as a benchmark when evaluating communications performance in mm-Wave scenarios.
Análisis de la técnica UFMC en un canal multitrayecto y usando estimación de canal
Authors: Iza Benítez Hugo Wladimir , Reinoso Chisaguano Diego Javier
Published: January 2021

UFMC (Universal Filtered Multi-Carrier) is a novel multi-carrier transmission technique that aims to replace the OFDM (Orthogonal Frequency Division Multiplexing) modulation technique for fifth generation (5G) wireless communication systems. UFMC, being a generalization of OFDM and FBMC (Filter Bank Multicarrier), combines the advantages of these systems and at the same time avoids their main disadvantages. Using a Matlab simulation, this article presents an analysis of the robustness of UFMC against fading effects of multipath channels without using a CP (cyclic prefix). The behavior of the UFMC system is analyzed in terms of the PSD (Power Spectral Density), BER (Bit Error Rate) and MSE (Mean Square Error). The results show that UFMC reduces the out-band side lobes produced in the PSD of the processed signal. Also, it is shown that the pilot-assisted channel estimation method applied in OFDM systems can also be applied in UFMC systems.
Red inalámbrica de sensores con topología lineal sin capa de red
Authors: Egas Acosta Carlos , Gil-Castiñeira Felipe , Costa-Montenegro Enrique
Published: January 2021

A particular case of wireless sensor networks are those that have a linear topology. These networks are used in monitoring large-scale linear infrastructures that are characterized by having thousands of sensor nodes, hundreds of hops and great lengths. The requirements for routing in linear topologies are minimal relative to the requirements of other topologies. There are currently several network architectures and routing protocols for wireless sensor networks, which have been created based on the application that will run on the nodes. Routing protocols designed for mesh, tree, and star topologies are very complex when applied to linear multi-hop topologies, resulting in large processing delays. This article defines the relevance of the existence of the network level in the network architecture with linear topology, for which the functions of the network protocols that are applicable to linear topologies are analyzed. Finally, it is justified that the network level is not necessary in wireless sensor networks with linear topology, and as a consequence, the network levels that the new network architecture should have are proposed.
Aplicación de tecnologías inalámbricas al monitoreo climatológico en la cuenca del Río Paute
Authors: Vazquez-Rodas Andres , Astudillo-Salinas Fabian , Minchala Luis I.
Published: January 2021

The program for the management of the water and soil (PROMAS) is a research department of the University of Cuenca. It focuses on the monitoring and conservation of the water sources and natural resources. Among others, such program mainly requires the monitoring of several variables by means of a set of hydro-meteorological stations. From its beginning, the program has deployed around 130 stations in an extensive geographic area of interest, ranging from the Cajas sector in the province of Azuay to the province of Cañar. Currently, the meteorological stations stores the variables of interest in their internal memory. Then, the analysis of the collected data requires the physical displacement of the Promas staff to the different sites. Due to the fact that most of the remote sites are of difficult access, the personal obtain the information with a periodicity of around 30 and 45 days. In this context, this paper describes the work on progress whose main objective is to provide to the meteorological stations with the wireless transmission capacity of the data collected by the sensors to the Promas data center in real time.
ПОВЕРХНЕВИЙ ШАР ДЕТАЛІ ІЗ СТАЛІ 45 ПІСЛЯ ЗМІЦНЕННЯ БОРУВАННЯМ І ЛАЗЕРНОЇ ОБРОБКИ
Authors: Чернета О.Г.,  , Сасов О.О.  , Шматко Д.З.  , Аверянов В.C.
Published: January 2021

В роботі досліджені технології обробки і зміцнення поверхневого шару деталей із сталі 45, що на першому етапі передбачають відновлення геометрії поверхні, борування і лазерну обробку борованого шару. Проведений аналіз структуроутворення пошарових зон в залежності від  технологічних методів обробки, розроблена методика визначення параметрів мікротвердості, пружності, коефіцієнту пластичності відповідних локальних зон за допомогою приладу “Micron-gamma”. Проведені дослідження фізико-механічних властивостей робочих шарів і мікротвердості. За результати проведених досліджень на відповідних зразках деталей із сталі 45 отримані зображення мікроструктур робочих поверхонь, приведені таблиці і графіки розподілу  мікротвердості поверхневого шару деталі. Представлені результати доводять про доцільність використовування розроблених технологій відновлення і зміцнення широкого спектру деталей із сталі 45 у машинобудуванні.
ПЕРСПЕКТИВНІ МАТЕРІАЛИ І ТЕХНОЛОГІЇ СОНЯЧНИХ ЕЛЕМЕНТІВ
Authors: Никируй Л.І.  , Замуруєва О.В.  , Новосад О.В.  , Федосов С.А.
Published: January 2021

У роботі проаналізовано публікації авторитетних світових науковців і з двох країн – України та Польщі у галузі «Фотоелектрика / Фотовольтаїка», щоб знайти закономірності як розвитку цього напрямку у кожній державі, так і визначити перспективи для спільних досліджень. Аналіз ґрунтується на результатах даних, опублікованих у міжнародних наукових базах даних Web of Science та Scopus. Виявлено найсучасніші галузі досліджень у кожній країні, проаналізовано як теоретичні, так і прикладні дослідження, спрямовані на практичне застосування.
ТЕРМОЕЛЕКТРИЧНІ ВЛАСТИВОСТІ КРИСТАЛІВ AgSbSe2–PbSe
Authors: Новосад О. В.  , Божко В. В.  , Федосов С. А.  , Шигорін П. П.
Published: January 2021

В роботі дослідженні термоелектричні властивості твердих розчинів AgSbSe2–PbSe.  Показано, що електричні та термоелектричні властивості залежать від складу твердого розчину AgSbSe2–PbSe. Змінюючи склад твердих розчинів AgSbSe2–PbSe можна плавно змінювати їх електричні та термоелектричні властивості. Більшість досліджуваних сполук виявились напівпровідниками p-типу провідності. Питома електропровідність кристалів на основі AgSbSe2 із збільшенням PbSe зменшувалась від 1,4 Ом-1∙см-1, для монокристалів AgSbSe2, до 10-2 Ом-1∙см-1, для монокристалів AgSbSe2–PbSe з вмістом 40 мол. % PbSe. Також зменшення питомої електропровідності спостерігалось і для монокристалів на основі PbSe із збільшенням вмісту AgSbSe2. В  AgSbSe2–PbSe на основі AgSbSe2  збільшенням вмісту PbSe призводить до зростання коефіцієнта Зеебека від 530 мкВ/К до 1100 мкВ/К для AgSbSe2 та монокристалів складу 60% AgSbSe2–40% PbSe. Досліджувані в роботі монокристали, маючи високе значення α, можуть використовуватися як матеріали чутливих термодатчикiв.
História da Educação Matemática como uma perspectiva de insubordinação criativa na formação de professores
Authors: Godoi Anieli Joana de , Gregorio Janine Marques da Costa , Rodriguês Jeremias Stein
Published: January 2021

Uma formação de professores que busca abordar a história do ensino de Matemática, de modo a refletir sobre aspectos da profissão, a escola e a disciplina, teria uma maior possibilidade de formar um professor propenso a insubordinações criativas? Na tentativa de responder a essa pergunta, buscamos apresentar o campo da História da educação matemática como facilitador de tal postura na formação daqueles que ensinam matemática. Discussões foram feitas acerca da criação do campo de História da educação matemática, sua inserção em cursos de licenciatura e suas relações com a formação dos professores. Baseamo-nos principalmente em Valente (2003, 2010, 2013, 2014, 2017), quanto ao campo da História da educação matemática, Oliveira (2017), no que se refere à criação de disciplinas nesta área, e D’Ambrosio e Lopes (2014, 2015), para abordar a insubordinação criativa do educador matemático. Concluímos que a formação de professores reflexivos é profundamente beneficiada por estudos acerca da história do ensino de matemática, desnaturalizando práticas e modelos da educação escolar, possibilitando assim a efetivação de ações de insubordinação criativa por parte do professor. Deste modo, a criação da disciplina “História da educação matemática se constitui como incentivadora de insubordinações criativas na educação.
A insubordinação criativa e o processo dialógico na Educação Estatística na infância
Authors: Corrêa Solange Aparecida , Lopes Celi Espasandin
Published: January 2021

Esta é uma pesquisa qualitativa do tipo pesquisa-formação que utiliza as narrativas autobiográficas como fonte de coleta de dados com o objetivo de analisar os elementos argumentativos e identificar ações de insubordinação criativa dos alunos às propostas de atividades com estatística oferecidas pelo professor. O propósito do estudo é investigar como as ações de insubordinação criativa expressas nas narrativas orais, escritas e audiogravadas das crianças favorecem o processo argumentativo durante o trabalho com a metodologia de Projetos de Classe, especificamente na área de estatística. Analisam-se narrativas de crianças de 7 anos a fim de mostrar indícios de insubordinação criativa às propostas e aos questionamentos explicitados pela pesquisadora. Os dados foram coletados numa classe de 25 alunos de 2.º ano do Ensino Fundamental numa escola de ensino particular na cidade de Campinas – interior do estado de São Paulo. Procurou-se investigar a seguinte questão central: “Quais indícios de insubordinação criativa e de desenvolvimento do processo argumentativo no estudo de estatística emergem das narrativas das crianças?”. Assim, este trabalho mostrou a reflexividade narrativa das crianças de 7 anos e a potencialidade de pensamento crítico desde essa idade para possíveis contribuições na produção de conhecimento na Educação Estatística e Matemática na Infância.
Rota percorrida no repensar da sala de aula de Estatística: uma navegação pela insubordinação criativa
Authors: Samá Suzi , Novaes Diva Valério
Published: January 2021

No presente artigo relata-se a rota percorrida ao longo do ser e fazer docente, na busca por superar os processos reprodutivos do ensino de Estatística. Navega-se pelas ondas da Insubordinação Criativa, rumo a uma prática pedagógica traçada com base nos estudos da Biologia, da Neurociência Cognitiva e da Educação Socioemocional. Para tal, o texto tem por objetivo apresentar atividades pedagógicas comprometidas com a justiça social na sala de aula de Estatística e planejadas de modo a promover a formação de um sujeito crítico, ético, democrático e colaborativo. Esta prática foi se construindo em um movimento constituído de ondas de reflexão que possibilitaram repensar a prática docente de forma a conduzir os estudantes a perceber as inter-relações da Estatística com os diferentes aspectos da vida em sociedade. As atividades pedagógicas planejadas por meio da pesquisa e da contextualização podem proporcionar aos estudantes compreender os conceitos estatísticos, bem como aspectos de sua formação pessoal, como autoconhecimento, consciência social, ética e equilíbrio nas relações consigo mesmos, com os outros seres humanos e com a própria vida.
Estudo ampliado da associação entre variáveis qualitativas e quantitativas, de forma insubordinada, com o uso do Geogebra
Authors: Tavares Fernando Gonzales , Lopes Celi Espasandin
Published: January 2021

Este trabalho estuda a relevância da detecção de outliers em um conjunto de dados, quando buscamos determinar a associação entre variáveis qualitativas e quantitativas. O artigo é um recorte de uma pesquisa desenvolvida para um programa de doutorado em ensino de Ciências e Matemática, que tem, entre seus objetivos, avaliar a usabilidade do software GeoGebra no ensino e na aprendizagem da Estatística nos cursos de ensino superior, especificamente nos cursos de graduação em Engenharia. A análise qualitativa com o uso do estudo de caso foi adotada como método de investigação, pois o fenômeno em estudo faz parte do contexto da vida acadêmica dos alunos. Foi desenvolvida uma atividade específica para avaliar a relação entre variáveis qualitativas e quantitativas, com alguns momentos de insubordinação criativa quando da escolha do conjunto de dados a ser analisado e também durante o processo de solução do problema. Romper com modelos preestabelecidos na forma de abordar e trabalhar conceitos estatísticos, reflete a fala de D’Ambrosio e Lopes (2015), quando ponderam sobre a autonomia do professor de matemática ser essencial para caracterizar a sua identidade profissional, pois atribui a eles a coragem para assumir atitudes de insubordinação criativa em prol daqueles que educam. No desenrolar da atividade constatou-se a presença de significativa quantidade de dados discrepantes em razão do tamanho do conjunto de dados em estudo, tal fato motivou a discussão entre os estudantes sobre a forte influência dos outliers no resultado da análise estatística. Um fator importante observado foi que independente das características de hardware dos computadores utilizados durante o experimento, foi possível empregar uma significativa quantidade de linhas de dados, o que permitiu a prática de ensino e aprendizagem da Estatística.
OuLiPo: juegos matemáticos en la literatura
Authors: Macho-Stadler Marta
Published: January 2021

OuLiPo – Ouvroir de Littérature Potentielle – was created in 1960 at the initiative of Raymond Queneau – a man of letters interested in mathematics – and François Le Lionnais – a man of science interested in literature –, and supported by a group of writers , mathematicians and painters. OuLiPo rejects inspiration as the only source of creativity; the restriction – the ‘contrainte’ – is its creative engine. In this paper we will give some examples of oulipian texts written under mathematical restriction. Essentially, mathematics underlies the structure of texts: combinatorics, geometry, topology or graph theory will appear as inspiring patterns in all these proposals.
A revista Al-Karismi (1946-1951) de Malba Tahan: a literatura como recurso didático para o processo de ensino e de aprendizagem em Matemática
Authors: Oliveira Cristiane Coppe de , Rezende Filho Carlos Antonio
Published: January 2021

O presente artigo compõe parte de um projeto de investigação em fontes primárias, junto ao Núcleo de Pesquisas e Estudos em Educação Matemática da Universidade Federal de Uberlândia (NUPEm/UFU). De natureza qualitativa, tem como objetivo apresentar discursos literários presentes na revista Al-Karismi (1946-1651) dirigida por Malba Tahan na cidade do Rio de Janeiro e suas potencialidades para contribuir no processo de ensino e de aprendizagem da matemática como um recurso didático. A literatura foi um elemento que conduziu a trajetória de escritor e de professor de Júlio César de Melo e Souza (1895- 1974) – o Malba Tahan. Desse modo, espera-se contribuir com a discussão/reflexão das interfaces que podem se estabelecer entre a matemática e a literatura no campo da prática e da pesquisa em Educação Matemática.
Afetos na Cidade das Esmeraldas: algumas reflexões das alunas de Pedagogia sobre como sentem a Matemática
Authors: Maffei Letícia de Queiroz , Silva João Alberto da
Published: January 2021

Este artigo se propõe como uma retomada do caminho percorrido na construção da tese de doutoramento na qual foi feita a aproximação das personagens de Oz com os afetos em relação à Matemática. No estudo realizado sob um viés fenomenológico, a obra de Frank Baum deu vazão às categorias de análise elucidadas. A partir dos escritos de pedagogas em formação, no que tange aos afetos estabelecidos perante a Matemática, podemos identificar alguns arquétipos. As personagens Oz (Dorothy, Homem de Lata, Leão e Espantalho) emergiram ao longo das leituras como elementos potenciais na ilustração do que se mostrava quando tais acadêmicas escreviam sobre suas memórias e vivências acerca da Matemática. A visualização das nuances de Oz nos escritos se mostrou como uma possibilidade de metáfora e intertextualidade que rompia com a rigidez associada à própria disciplina. Também, foi o tônus para a percepção efetiva das diferentes perspectivas em que os afetos se direcionavam. Por fim, o que se pode perceber é que não há como separar a forma como estudamos, aprendemos e ensinamos Matemática da forma como nossos afetos são mobilizados, sendo estes potencializadores desta relação de ensino e aprendizagem.
Assessment of Anteroposterior Diameter of Nasolacrimal Canal with Multidetector CT in a Tertiary Care Center of Nepal
Authors: Chaulagain Rajib , Paudel Bigyan , Poudel Dipesh
Published: January 2021

Introduction: The nasolacrimal canal is an important structure. It morphologically varies throughout its length. The narrowest part of the canal is the key factor in the development of the primary acquired nasolacrimal duct obstruction. This study was aimed to assess anteroposterior nasolacrimal canal diameter and study its variation by comparing the data with the gender of the patients.

Methods: A descriptive cross-sectional study was conducted among the patients coming to the Chitwan Medical College, Nepal from January 2021 till June 2021. In total 200 eligible CT scans of patients were included. CT scan was performed using Somatom Definition Edge CT scan machine. The data were entered into Microsoft excel, later transferred into Statistical Package of Social Science (SPSS) version 16 and analysed using descriptive statistics.

Results: There were 200 participants in total in this study in which majority were males 126 (63.3%) male and 72 (36.4%) female participants. The mean age of the participants was 40.81±18.06 years. The measurement on the right side of both genders was more than the left side. In total the measurement on the right side (Mean ± SD (mm)) was 4.18±0.092 mm.

Conclusions: This study concludes the diameter of nasolacrimal canal differ by gender and the sides of individual. It was found to be more in females and on the right side of Nepalese.
Assessing Severity of Chronic Obstructive lung disease (COPD) Using CAT score among high altitude residents of Nepal
Authors: Pal Anusmriti , Kumar Yadav Manoj , Krishna Gupta Tula
Published: January 2021

Introduction: The goal of this study was to see if the Chronic Obstructive Pulmonary Disease (COPD) Assessment Test (CAT) score was beneficial in determining the severity of COPD patients. It produces a score that reflects the impact of the condition on their health status. GOLD guideline (2013) recommends CAT above other respiratory questionnaires since it is regarded to be a better assessment tool.

Methods: Cross-sectional study conducted in Karnali Academy of Health Sciences, Jumla (Nepal) who presented with COPD exacerbation. A validated CAT questionnaire in the local language (Nepali) was employed and completed by the patient, and then the total CAT score was calculated and grouped into four impact levels. Data was evaluated using descriptive statistics (such as percentage and mean) and Pearson’s correlation tests to compare means.

Results: Out of 55 patients, 52.7% were females; all 55 had firewood exposure with current smoking history more prevalent in the high-impact group 0.5%. At 3 months, the median number of COPD exacerbations was 2 (range: 0–90) with median CAT score 30 (range: 17–37). Patients were divided into severity groups based on their CAT scores. 47.3% were in the high impact group, whereas none were in the low impact group. The “very high impact” group had a considerably higher median number of exacerbations than the other high impact and medium groups (5 vs. 2 and 0) respectively with p<0.001. In the “very high impact” group, significant use of inhalers in form of salbutamol or long-acting bronchodilators in combination with steroid was seen.

Conclusions: CAT is an independent severity score that is higher in frequent exacerbates. The “very high impact” group had a considerably higher median number of exacerbations than the other groups (5 vs. 2 and 0) respectively with a significant p<0.001 value. Thus, useful in monitoring patients health status and treatment.
Innovative Draping Method to Mitigate Aerosolization During Coronavirus Pandemic
Authors: Dongol Kripa , Neupane Yogesh , Shakya Dipesh
Published: January 2021

Otolaryngologists are at high risk of acquiring coronavirus because most of the procedures are aerosol generating and we have to deal with upper airways which contain high viral load. The objective of this study is to elaborate the draping technique which diminishes aerosol in the operating room. Use of a framework and a drape with customized hand insertion ports help to contain the aerosol generated during the operative procedure. The draping technique acts as an additional form of protection from aerosol along with an increase in self-confidence to the healthcare workers during this pandemic.
A Comparative Analysis Of Depth of Curve Of Spee Between Individuals with Normal Dentition And Individuals With Occlusally Worn Out Dentition
Authors: Khanal Bibek , Mishra Sapkota Srijana , Thakur Smriti Narayan , Chaulagain Rajib
Published: January 2021

Introduction: The curve of spee plays an important role to create Christensen’s phenomenon in natural dentition. This study was performed to assess the difference in depth of the curve of Spee between normal and attrited dentition.

Methods: An analytical cross-sectional study was performed to measure the depth of curve speed in a total of 80 willing participants who met the inclusion criteria, of which 40 had normal dentition and 40 had attrited dentition. Measurements were done on stone casts by using a rigid metal scale and a digital vernier caliper. Analytical statistical analysis (independent t-test) was done using SPSS Statistical Software Package (version 21.0).

Results: There was a statistically significant difference in the depth of the curve of Spee between the two groups.

Conclusions: The depth of the curve of spee decreases with the advancing of the age of human as attrition of the teeth occurs with age. Although there is a decrease in the depth of the curve of spee it should be maintained and created while performing full mouth rehabilitation and other extensive prosthodontic treatments.
Thermal Stresses in Adhesively Bonded Joints: Numerical and Analytical Analysis
Authors: Marchione Francesco
Published: January 2021

The adhesive technique is observing a considerable increase in applications in various fields. Unlike traditional joining methods, this technology allows the stress peaks and the weight of the resulting structure to be reduced. Adhesive joints during their service life not only undergo mechanical but also thermal stresses. The thermal compatibility between the adhesive and the adherents used is a fundamental aspect to consider in the design phase. This paper reports on and analyses the results obtained from a linear Finite Element Method (FEM) simulation for a hybrid adhesive joint, as the thickness and characteristics of the adhesive layer vary. An analytical solution for adhesive free joints is presented according to both beam and plate theories. The analytical and numerical results, in case of no adhesive, are in good agreement with good approximation. The introduction of the adhesive layer allows to obtain higher displacement values than in the adhesive-free configuration. The increase in displacement and therefore in ductility confirms the effectiveness of the adhesive joint for real applications.
A közbeszerzésekről szóló törvény 2020 decemberében elfogadott módosítása
Authors: Soós Gábor , Várhomoki-Molnár Márta
Published: January 2021

A cikk a közbeszerzésekről szóló törvény 2020 decemberében elfogadott módosításának elemeit ismerteti. A törvénymódosítás az eljárási szabályok rugalmasabbá tételét, az adminisztratív terhek csökkentését célozza, valamint különösen a kizáró okok szabályainak felülvizsgálatával összhangba hozza a hazai szabályozást az Európai Unió Bíróságának újabb gyakorlatával.
Regulatiivinen pilari hallinnon institutionaalisessa muutoksessa: Tapaustutkimus Suomen ortodoksisen kirkon työsuhdekäytännöistä
Authors: Peltonen Tuomo
Published: January 2021

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The Possibility of Healing Deep Wounds in Rats Using Helium Neon Laser
Authors: Rabab Hajwal Al-Zamily
Published: January 2021

Laser treatment is generally used for tissue restoration. Restorative soft tissues include objective, practicaland difficult responses.The goal of the research have being to estimate the irradiation capabilities the helium neon laser irradiationon three different types of wounds depth.Sixty young male rats were used in this study, divided into three groups. (20 per group) Wounds were createdwith different depth for the first, second and third group have been irradiated by the laser using He-Neenergies flowing 4 minutes, five out of twenty animals left without radiation is considered to control.Biopsy was taken from all rats for histological examination at 1, 3 and 7 days after surgery. The resultsshowed a clear enhancement of treatment wounds from control, Helium neon laser failure in the treatmentof very deep wounds.
The Accuracy of Intrinsic Compression Ultrasound Elastography (E-Thyroid) in Differentiating Benign From Malignant Thyroid Nodule
Authors: Najlaa Hanoon
Published: January 2021

Background: Ultrasound elastography (USE) is an ultrasound-based technique that addresses the biomedicalproperties of the nodules. Based on the stiffness of the tissue this technique differentiates between the benignnodules from the malignant ones where the hard and soft tissue is determined by the high or the low elasticityvalues respectively. The present study aimed to evaluate the efficacy of the E-thyroid in the differentiationof malignant and benign thyroid nodules and also a cut off ECI value using fine-needle aspiration as thediagnostic standard of referenceMethods: The current prospective study was done on 80 patients in the radiology department in Al Yarmoukteaching hospital in Baghdad city from April 2018 to April 2019. All the patients referred from the outpatientclinic. All the patients were examined sonographically starting with B mode ultrasound then elastoscanexamination was done.Result: The study result showed that among the 80 patients 65 had a benign nodule and only 15 werediagnosed with a malignant thyroid nodule. The ECI value and the histopathological result showed asignificant agreement in the result and a cut off ECI value of 4 were shown to be effective to diagnose thepresence of malignant thyroid nodule.Conclusion: Overall, the present study showed that USE can be effectively used to differentiate between themalignant and benign thyroid nodules and being a safe method this can be used widely. However, the resultof this study needs further validation with a larger study population.
The Effects of Different Intensive Physical Performances by athletes on Selected Hematological Parameters
Authors: Shumoos H Alwaid
Published: January 2021

The aim of this review study is to compare the effects of different intensive physical performances andcompetitions from several studies include (football, basketball, 24h marathon race and cycling) games onhematological parameters of males players. And to find the one with strongest effect on those parametersamong the performances. The Hematological parameter include white blood cell count (WBC ) , redblood cell count (RBC) count , hemoglobin (HGB), haematocrit (HCT), mean cell volume (MCV) , meancorpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC) and platelet count(PLT). Iron and Feritten level also estimated in one study. When comparing the blood values for all theplayers before and after the competitions period, there were significant differences in prevalence of most ofblood parameters in all studies but the most impact was in 24 h marathon performance of 11 male runnerswho raced for 24 hours around a 400 m oval track, covering at least 100 km of distance. The runners changedcourse every 4 hours and were allowed to rest and freely consume food and water. The blood samples wereobtained from subject in 2 and 9 days prior to competition and after competition. The result was showing thatthe the runners suffering from distinguish blood anemia appear after competition in 2 day. The findings showthat the hematological parameters could be affected by endurance of performance depending on competitiontime period and intensity of physical performance.
Head Posture and Functional Ability of Upper Extremity in Adolescents Use Smartphone
Authors: Amira H. Mohammed
Published: January 2021

Objective: This study aimed to determine the impact of smartphone use in head posture and functionalability of upper extremity in adolescents and the correlation between them.Design: Cross sectional design.Method: Forty adolescents divided into two groups (group I and group II) based on the smartphonetime use per day. They were assessed for neck pain by Visual analogue scale (VAS), the disability of theupper extremity by Upper Extremity Functional Index (UEFI) and the head posture angles by AutoCADphotographic analysis.Results: The results of this study represented significant differences in all measurable variablesinthe group(II) as compared to the group (I). Also, the results of this study represent there were significant strongrelationships between the measurable variables.Conclusion: We could conclude that the prolonged duration of smartphone use had significant effects on thehead posture and functional ability of adolescents.
Media and Armed Conflicts: An Overview
Authors: Zahoor Musharaf , Sadiq Najma
Published: January 2021

Being newsworthy, conflicts attract much of the media attention. The interaction between the media (print or electronic) and the armed conflicts has taken multiple forms in history, and different journalists or news organizations have approached different armed conflicts differently. In the backdrop of the constant debate over morality and objectivity in journalism, this study investigates the evolving academic debate around the relationship of media and armed conflicts, especially with the advent of new communication platforms. The digital platforms that allow the sharing of multimedia content, including social networking and microblogging websites, facilitate disseminating the news content and serve as essential tools for newsgathering. The instantaneous nature of these platforms and unlimited outreach make them attractive tools to be used by traditional news organizations. They gain even more importance in the conflict zones — where it is difficult for them to have their correspondents on the ground. Therefore, the present paper outlines new technologies by the traditional news organizations that have reshaped the relationship between conflict and media. It also discusses the role of news media in shaping public opinion and policy.
Bedienungsfreundliche Steuerungstechnologie
Authors: Etmanski Birgit
Published: January 2021

Anlässlich ihres gemeinsamen Jubiläums blickten der Elektronikspezialist Mitsubishi Electric und der Werkzeugmaschinenbauer Yamazaki Mazak auf ihre nun bereits 40 Jahre andauernde Kooperation zurück: Eine Erfolgsgeschichte zweier Unternehmen mit japanischen Wurzeln in Nordrhein Westfalen, die zugleich tiefe Einblicke in die Fortschritte der CNC-Technik vermittelt.
Messtechnik für E-Fahrzeuge
Authors: Müller Bernd
Published: January 2021

Der Aufbau eines Elektromotors unterscheidet sich deutlich von dem eines Verbrennungsmotors: Elektromotor und die Batterie bilden im Elektroauto den Antriebstrang, gespeist durch eine integrierte Leistungselektronik. Dieser Wandel hat eine enorme Auswirkung auf die Herstellung und Montage der Komponenten. Was bedeutet das für die Prüf- und Messkonzepte?
Geringe Taktzeit dank Messtaster auf Sondermaschine
Authors: Drechsel Theo
Published: January 2021

Bearbeitungszentren von Strama-MPS aus Straubing bieten durch ihre Rundtaktbauweise ein Höchstmaß an Wirtschaftlichkeit und Produktivität. Ihren Beitrag dazu leisten Messtaster von Blum-Novotest: Zwei „TC76“ messen zeitgleich zwei Nocken in rund 2 s mit einer Messgeschwindigkeit von 3 m/min.
Viel Raum für Optionen
Authors: Fahry Gerd
Published: January 2021

Im Januar 2020 hat die Hardinge Group ihr neues Maschinenkonzept für das Innenrundschleifen „Made by Voumard“ präsentiert. Damit soll die Marke, die seit 2014 Teil der Unternehmensgruppe ist, wieder zu alter Stärke im Markt der anspruchsvollen Schleifbearbeitung geführt werden.
5-Achsen-Simultanfräsen aus wirtschaftlicher Sicht
Authors: Vergin Helmut
Published: January 2021

Wie bei keiner anderen Frästechnik entstehen bei der 5-achsigen Simultanbearbeitung auf modernen Hochleistungsmaschinen schnell und effizient hochwertige Oberflächen. Dennoch bevorzugen viele Werkzeug-, Formen- und Maschinenbauer die Fertigung mit festen Stellachsen. Der simultanen Mehrseitenbearbeitung stehen sie eher kritisch gegenüber. Sind die Bedenken gerechtfertigt?
In Echtzeit im „grünen Bereich“
Authors: Naumann Michael
Published: January 2021

In Frankreich gilt die Schneider Electric SE seit der Gründung 1836 als Unternehmen mit sehr innovativen Produkten. Heute besteht das Portfolio aus Anlagen für die Energieverteilung sowie für die Industrieautomatisierung. Die MES-Software von Proxia gibt dem Werk in Sarre-Union die Möglichkeit, mehr Transparenz in die Fertigung zu bringen – sowie eine sichere Datenbasis zur Ermittlung des OEE.
Alles muss ineinandergreifen
Authors: Jänicke Lutz
Published: January 2021

Der Datensicherheit kommt bei der digitalen Transformation eine immer größere Bedeutung zu. Doch wie sollten Unternehmen im Operation Technology (OT)-Bereich verfahren? Der 360-Grad-Ansatz von Phoenix Contact hat alle relevanten Aspekte im Blick und unterstützt die Anwender ganzheitlich.
Liquid Metal Printing
Authors: Glasschröder Johannes , Otter Martin , Himmel Benjamin , Leusch Oilver , Miklec Christian , Wörle Franziska
Published: January 2021

Der industrielle Einsatz metallverarbeitender additiver Fertigungsverfahren nimmt in den letzten Jahren kontinuierlich zu. Ein breiter wirtschaftlicher Einsatz in der Mittel- und Großserienproduktion wird jedoch durch hohe Anlagen-, Fertigungs- und Materialkosten sowie durch eine fehlende Automatisierung gebremst. Die Firma Grob Werke entwickelt derzeit ein neues additives Fertigungsverfahren, das den aktuellen Herausforderungen entgegentritt und die wirtschaftliche Produktion von endkonturnahen Bauteilen möglich machen soll.
Herausforderung Prozesssicherheit
Authors: Schaaf Siegfried
Published: January 2021

Inmitten einer Urlaubsidylle mit grasenden Kühen und imposantem Alpenpanorama produziert die Alois Berger GmbH & Co. Präzisions-Maschinenbauteile KG in Wertach technisch anspruchsvolle Präzisionskomponenten und Kugelgewindegetriebe für einige der führenden Maschinenbauer der Welt.
Retrofitting für drahtverarbeitende Maschinen
Authors: Kiesow Jörg
Published: January 2021

Mit der Einführung der Servotechnologie und dem damit verbundenen Bau von computerunterstützten, volldigitalisierten Steuerungen – seit Beginn der 2000er Jahre – hat es im Anlagenbau rasante Fortschritte gegeben. Heutige Drahtverarbeitungsmaschinen liefern mithilfe vieler Sensoren riesige Datenmengen, die für die Produktionsoptimierung unerlässlich sind. Höhere Taktleistung, Energieeffizienz, Qualitätskontrolle und vorausschauende Wartung sind einige der Stichworte.
Kosten mit Lean-Maßnahmen reduzieren
Authors: Schneider Markus
Published: January 2021

In Krisenzeiten nehmen Lean-Management-Ansätze wieder an Bedeutung zu. Denn insbesondere mittelständische Fertigungsunternehmen können mit entsprechenden Maßnahmen vergleichsweise schnell ihre Kosten reduzieren und die Liquidität sichern.
Kurs in Richtung Zukunft
Authors: Drechsel Theo
Published: January 2021

Piekenbrink Composite wächst seit Jahren dynamisch. Das hat viel mit dem Know-how bei der Herstellung von Composite-Strukturteilen zu tun, die unter anderem im Flugzeugbau Verwendung finden. Bei CAD und CAM wird ausschließlich „Visi“ genutzt, denn sowohl die Konstruktion von Vakuumhauben als auch das Fräsen von Ureol-Modellen und Faserverbundwerkstoffteilen erfordert ein Maximum an Flexibilität.
Wettbewerbsfähig im digitalen Zeitalter
Authors: Boll Sascha
Published: January 2021

Herausforderungen in Fertigungsunternehmen betreffen vor allem die bedarfs- und zeitgerechte Steuerung des gesamten Materialflusses, die kundenindividuelle, passgenaue Fertigung sowie die unternehmensübergreifende Vernetzung der Supply Chain. Dazu setzen viele Firmen auf aktuelle ERP-Lösungen wie etwa „S/4Hana Manufacturing“.