bluuebunny/crossref_metadata_2025_split huggingface dataset:
Enhanced Atmospheric Plasma Spraying of Thick TBCS by Improved Process Control and Deposition Efficiency
Authors: Lugscheider E. , Ladru F. , Gourlaouen N. , Gualco C. 
Published: May 2021

Abstract
The gasturbine industry is performing utmost efforts to allow increased operation temperatures to improve engine efficiency by a reduced cooling air/fuel-ratio. The reason is to save fuel and at the same time lower emission rates. A possible solution to improve the insulation of the Thermal Barrier Coating (TBC) is followed by the strategy of developing reliable thick TBCs. To be successful concerning the coating quality and to apply thick TBCs at reasonable costs and spray time it is necessary to apply the coating consistently by high deposition rates. The plasma spraying of thicker coatings leads to long spray periods which demands for a process control to keep the process parameters within the tolerances during the entire spray procedure. A major property is the control of substrate temperature with pyrometer systems and to define the process tolerances. Furthermore, a high deposition efficiency is of prime importance to shorten spray times. The optimisation of the gas composition in terms of viscosity and thermal conductivity (SPRAL 22) enables to increase dramatically this efficiency by 30% to 70%. Moreover, in order to reduce thermal expansion mismatch between substrate and ceramic top coat, a high amount of porosity is beneficial to lower young's modulus of the ceramic top. This can be achieved by adding a polymer powder to the yttria partly stabilised zirconia powder. It also leads to an increase in deposition efficiency.
Oxygen Transport Through the Zirconia Top Coat in Thermal Barrier Coating Systems
Authors: Fox A.C. , Clyne T.W. 
Published: May 2021

Abstract
The gas permeability of plasma sprayed yttria-stabilised zirconia coatings has been measured over a range of temperature, using hydrogen and oxygen gas. The permeability was found to be greater for coatings produced with longer stand-off distances, higher chamber pressures and lower torch powers. Porosity levels have been measured using densitometry and microstructural features have been examined using SEM. A model has been developed for prediction of the permeability from such microstructural features, based on percolation theory. Agreement between predicted and measured permeabilities is good. Ionic conduction through the coatings has also been briefly explored. It is concluded that transport of oxygen through the top coat in thermal barrier coating (TBC) systems, causing oxidation of the bond coat, occurs primarily by gas permeation rather than ionic conduction, at least up to temperatures of about 1000°C and probably up to higher temperatures. Top coat permeabilities appreciably below those measured will be required if the rate of bond coat oxidation is to be reduced by cutting the supply of oxygen to the interface.
Thermal Expansion of Thermally Sprayed Coatings
Authors: Beghini M. , Bertini L. , Frendo F. 
Published: May 2021

Abstract
The coefficient of thermal expansion (CTE) of a NiCoCrAlY coating was investigated in this work. The CTE was inferred from the measured length variations of coated prismatic symmetric specimens (i.e. having the coating on two opposite surfaces) at various temperature increments. The elongation of the specimen was evaluated from the relative positions of two markers, which was recorded during the test by a CCD video camera; analysis with subpixeling technique allowed high resolution in the dilatation measurements. Analytical relationships used to determine the coating's CTE were based on the simple multilayer beam model; the temperature dependent elastic moduli of the layers had been determined by four point bend test in a previous work. Coated specimens were employed having different substrate thicknesses in order to check the accuracy of measurements.
Microstructures and Characterization of Zirconia Coatings Formed by Laser Combined Plasma Spraying
Authors: Zhou Z. , Eguchi N. , Shirasawa H. , Ohmori A. 
Published: May 2021

Abstract
Hybrid plasma spraying combined with YAG laser irradiation was studied in order to obtain the optimum zirconia coatings for thermal barrier use. Zirconia coatings of approximately 150 ;Um in thickness were formed on the NiCrAlY under coated steel substrates both by means of conventional plasma spraying and hybrid plasma spraying under a variety of conditions. Post-laser irradiation was also conducted on the plasma as-sprayed coating for comparison. The microstructure of each coating was studied in detail and, for some representative coatings, thermal barrier properties were evaluated by hot erosion and a hot oxidation test. With hybrid spraying, performed under optimum conditions, it was found that a microstructure with appropriate partial densification and without connected porosities was formed and that cracks, which are generally produced in the post-laser irradiation treatment, were completely inhibited. In addition, hybrid spraying formed a smooth coating surface. These microstructural changes resulted in improved coating properties with regard to hardness, high temperature erosion resistance and oxidation resistance. Keywords: Hybrid spraying, YAG laser, Plasma-spraying, Thermal barrier coating, Zirconia, NiCrAlY, Densification, Hot-erosion resistance. Oxidation resistance, Roughness.
Thermal Spray Application for the Next Millennium A Business Development Perspective
Authors: Kassabji F. , Jacq G. , Durand J.P. 
Published: May 2021

Abstract
For over 60 years, thermal spraying technology has advanced steadily in aerospace, power generation, and biomedical applications. Worldwide R&D efforts have produced new coating materials, new functionalities, and new processes with significant application potential in the near term. Likewise, more project teamwork, more market driven R&D, and end used education will carry thermal spraying into the next millennium.
Iatrogenic neurological injury after radiofrequency ablation and epidural steroid injections: illustrative cases
Authors: Shields Lisa B. E. , Iyer Vasudeva G. , Zhang Yi Ping , Shields Christopher B. 
Published: May 2021

BACKGROUND
Neck pain is often chronic and disabling. Cervical facet joint injections and epidural steroid injections are frequently used to manage chronic neck pain and cervicogenic headaches. While minimal side effects are commonly associated with these treatments, severe complications are exceedingly rare.

OBSERVATIONS
The authors report 4 cases of iatrogenic neurological injury after radiofrequency ablation (RFA) and epidural steroid injections. One patient experienced left shoulder, scapular, and arm pain with left arm and hand weakness that developed immediately after RFA for chronic neck pain. Electromyography/nerve conduction velocity (EMG/NCV) studies confirmed denervation changes in the left C8–T1 distribution. Three patients complained of numbness and weakness of the hands immediately after an interlaminar cervical epidural block. One of these patients underwent EMG/NCV that confirmed denervation changes occurring in the left C8–T1 distribution.

LESSONS
Spine surgeons and pain management specialists should be aware of neurological injuries that may occur after cervical RFA and epidural steroid injections, especially after a multilevel cervical procedure and with severe cervical spinal stenosis. EMG/NCV studies plays an important role in detecting and localizing neurological injury and in differentiating from conditions that mimic cervical root injuries, including brachial plexus trauma due to positioning and Parsonage-Turner syndrome.
KARAKTERISTIK TANAH TERDAMPAK DAN TIDAK TERDAMPAK LIKUIFAKSI BERDASARKAN UJI SWEDISH WEIGHT SOUNDING PADA KELURAHAN PETOBO
Authors: Setiawan Hendra , Kurniawan Sigit 
Published: May 2021

Gempa bumi 28 September 2018 yang mengguncang Kota Palu dan sekitarnya dengan kekuatan 7,4 MW memicu terjadinya likuifaksi di beberapa lokasi, salah satunya adalah di sebagian wilayah Petobo. Likuifaksi yang terjadi di daaerah ini mengakibatkan pergeseran tanah yang masif sehingga menimbulkan kerugian material dan korban jiwa.Penelitian ini bertujuan untuk mengetahui karakteristik tanah terdampak dan tidak terdampak likuifaksi berdasarkan uji Swedish Weight Sounding pada Kelurahan Petobo. Pengujian lapangan yang dilakukan yaitu dengan alat uji Swedish Weight Sounding. Adapun pengujian laboratorium yang dilakukan meliputi pengujian Analisa saringan dan batas-batas Atterberg. Hasil yang diperoleh dari penelitian ini meliputi hasil pengujian laboratorium dan pengujian di lapangan. Untuk hasil pengujian di laboratorium, jenis tanah yang didapat pada lokasi tersebut yaitu CL dan CL-ML. Sedangkan untuk hasil pengujian lapangan, nilai Nsw di daerah tidak terdampak berkisar antara 0-250 n/m, nilai Nsw untuk daerah terdampak berkisar antara 8-72 n/m, nilai qa di daerah tidak terdampak berkisar antara 0-230 kN/m2, nilai qa untuk daerah terdampak berkisar antara 0-167,6 kN/m2, nilai qu untuk daerah tidak terdampak berkisar antara 30-180 kN/m2, dan nilai qu untuk daerah terdampak berkisar antara 30-133,2 kN/m2.Kata Kunci : Tidak terdampak likuifaksi, terdampak likuifaksi, Swedish Weight Sounding, Likuifaksi
Propriedades físicas de um Argissolo após 17 anos de florestamento com Eucalyptus spp.
Authors: Chaves Estéfane , Santos Caroline Valverde dos , Ramos Priscila Vogelei , Inda Junior Alberto Vasconcellos , Caner Laurent 
Published: May 2021

A expressiva expansão do setor florestal no Brasil tem dado evidencia a estudos que direcionam suas ações de investigação para a preservação e utilização racional dos recursos naturais. A pesquisa tem demonstrado que mudanças no uso do solo, alteram as suas condições pedoambientais. Sendo assim, o presente estudo teve como objetivo principal investigar ações antrópicas de longa duração sobre área do bioma Pampa no Rio Grande do Sul: Efeito nos atributos físicos de solo com substituição do uso sob campo para o uso do solo com florestamento comercial de Eucalyptus spp. Amostras de um Argissolo Vermelho Distrófico foram coletadas em horto florestal, em triplicata e em cinco profundidades e também foi coletado um solo de controle, vegetado com campo natural. Não houve alteração na distribuição granulométrica do solo. Após 17 anos de florestamento foi observado um incremento no teor de hematita nos solos da floresta e rizosfera da floresta, aumento nos valores da suscetibilidade magnética e diminuição da área superficial específica das partículas em profundidade.
Evaluation of the knowledge of university students in the health area about sexually transmitted infections: A cross-sectional study
Authors: Sartorão Filho Carlos Izaias , Sartorão Neto Carlos Izaias , Guazelli Carla Fabiana Souza , Avello Camila Rodrigues , Rodrigues Ivana Geraldelli Neiva , Alvarez Luana Durante , Reis Fabiana Vieira Duarte de Souza , Fagundes Vanessa Patrícia , Takano Luiz , Barbosa Angélica Mércia Pascon , Prudêncio Caroline Baldini , Rudge Marilza Vieira Cunha 
Published: May 2021

Introduction: Sexually transmitted infections (STI) have consequences that negatively affect the population's quality of life and health. Young adults are susceptible to low access to preventive measures and a greater behavior risk. The objective was to evaluate and compare STI' Knowledge in university students from health courses, a public institution, and a private institution of higher education in Brazil. Methods: a cross-sectional study conducted in 2019 in Brazil at the FEMA School of Medicine in Assis-SP and the University of the State of São Paulo (UNESP) in Marília in the courses of Physiotherapy, Speech Therapy, and Occupational Therapy, in undergraduate students, over 18 years of age, through a self-applied questionnaire translated and adapted to the Brazilian Portuguese from the STD-KQ – Transmitted Disease Knowledge Questionnaire.Results: 462/700 students participated (66.66%) 18-46 years of age (mean 21.46 years, +/- 3.61), 99 men and 363 women. In the private institution, 262/340 (77.06%), and in the public institution, 200/360 (55.55%). The mean age was 22.21 (+/- 4.21) years among men and 21.25 (+/- 3.41) years among women. The mean percentage of the 28 test questions' correct answers was 52.07%. The average number of correct responses per student was 17.49 out of 28 possible, 62% (+/-4.97). The distribution between the groups was normal. In the multiple linear regression model for the percentage of correct answers, adjusted for the confounding variables, the intercept was 55.2. The students of the private institution answered 19,655 questions more than the public one (P<.001), and for each semester of graduation, the students answered 1,628 more questions (P<.001). There were no relevant differences regarding the gender and age of the students. Conclusion: there are gaps in STI knowledge among university students in the health area. The students of the first semesters of the courses, and, in particular, students from a public educational institution, had a significantly lower performance of the right in the questionnaire applied. Thus, actions to promote STI knowledge and preventive attitudes are necessary among university students.
Dieta de Bryconamericus microcephalus (Characiformes, Characidae) em riachos da bacia do rio Cubatão (São Paulo, Brasil)
Authors: Costa João Henrique Alliprandini da , Barrella Walter , Souza Ursulla Pereira 
Published: May 2021

Analisamos a dieta de Bryconamericus microcephalus, espécie mais abundante nos riachos da bacia do rio Cubatão. Os exemplares foram coletados com pesca elétrica em 2016, em dez diferentes pontos da bacia, dentro da UC - Núcleo Itutinga-Pilões. Os peixes foram identificados, mensurados, pesados e dissecados. Estômagos com alimento foram retirados para análise da dieta pelo Grau de Preferência Alimentar. A dieta foi analisada através da relação do índice de diversidade de Shannon-Weaver e as características dos indivíduos. A relação entre os itens alimentares e o comprimento da espécie foi analisada por um teste de correlação de Pearson, e as relações dos itens qualitativos (sexo e os estádios de maturação gonadal) por uma Análise de Variância two-way. Foram amostrados 211 indivíduos, sendo 43 machos, 66 fêmeas e 102 imaturos. Analisamos 45 estômagos, nos quais registramos 20 itens, classificando a população estudada como onívora, com consumo principal de formas imaturas de insetos. O registro da maioria dos itens foi classificado como ocasional, refletindo o caráter oportunista da espécie, com consumo de itens de origem alóctone, evidenciando a forte relação com a mata ciliar. Ressaltamos assim, que a análise da dieta permite melhor compreensão da ecologia da espécie e sua conservação.
Ambientes Virtuais de Aprendizagem e Chatbot como facilitadores do Processo de Ensino e Aprendizagem de Biologia
Authors: Neves Kiandro de Oliveira Gomes , Magalhães Netto José Francisco de , Ferreira Rosilene Gomes da Silva 
Published: May 2021

Frente a sociedade da informação, com a presença dos nativos digitais, a educação sobre grandes mudanças, com a necessidade de novas metodologias pautadas na realidade dos alunos e que lhes propicie autonomia. Ambientes Virtuais de Aprendizagem – AVAs e Chatbots, por exemplo, têm apresentado bons resultados quando aplicados no contexto escolar. Nesse sentido, este estudo apresenta a aplicação e análise do uso de um AVA com um Chatbot integrado, como ferramenta de ensino e aprendizagem de Biologia. A partir da integração das tecnologias digitais em uma metodologia de ensino híbrido, seguindo o modelo de sala de aula invertida, foi possível contribuir para o desenvolvimento conceitual de 52 alunos do terceiro ano do ensino médio, com a aquisição de habilidades referentes ao objeto de conhecimento em Relações Ecológicas. A partir da análise dos relatos dos alunos e do docente é possível concluir que as tecnologias utilizadas proporcionam a construção de conhecimentos e favorecem a prática docente, mostrando a necessidade de mais estudos com a finalidade de aprimorar, expandir e difundir as ferramentas tecnológicas utilizadas no contexto escolar brasileiro.
Caracterização hidrodinâmica e térmica de um solo de Mata Atlântica
Authors: Cavalcanti Ariela Rocha , Soares Willames de Albuquerque , Holanda Marco Aurélio Calixto Ribeiro de 
Published: May 2021

As Caracterizações hidrodinâmica e térmica do solo são indispensáveis para subsidiar pesquisas relacionadas a análise dos processos de interação solo-planta-atmosfera. Deste modo, o intuito desta pesquisa é realizar a caracterização hidrodinâmica e térmica de um solo que compõe um fragmento de Mata Atlântica, localizado no bairro de Dois Irmãos, Recife, Pernambuco, Brasil. Para tanto, foram realizados ensaios laboratoriais de granulometria e ensaios de infiltração utilizando-se uma coluna de solo. Para obtenção dos parâmetros hidrodinâmicos seguiu-se a metodologia Beerkan Estimation of Soil Transfer (BEST), enquanto que as propriedades térmicas do solo foram obtidas a partir de modelos propostos por De Vries (1963). Após estes procedimentos, o solo em análise foi classificado como franco arenoso. Verificou-se que o BEST forneceu valores coerentes para os parâmetros de forma e de normalização das curvas de retenção da água no solo e de condutividade hidráulica. Com relação às propriedades térmicas do solo observou-se uma significativa variação com o aumento da umidade, ficando evidente que a água no solo desempenha um papel determinante na dinâmica da propagação do calor. Os valores das propriedades hidrodinâmicas e térmicas do solo, fornecidos pelos diferentes métodos empregados, encontraram-se dentro da faixa estabelecida na literatura.
Eficácia do sistema WaveOne Gold no preparo de canais longo ovais com instrumentos únicos e em modo sequencial
Authors: Kublitski Prescila Mota de Oliveira , Romano Bruna de Souza , Marques-da-Silva Bruno , Tomazinho Flávia Sens Fagundes , Santos Vinícius Rodrigues dos , Silva Wander José da , Fariniuk Luiz Fernando , Beira Lara Dalla Vecchia , Baratto-Filho Flares , Gabardo Marilisa Carneiro Leão 
Published: May 2021

O objetivo deste estudo foi avaliar variação de volume, porcentagem de áreas não instrumentadas e de debris após o preparo de canais longo ovais com o sistema WaveOne® Gold (WOG) com duas técnicas: uso cada instrumento dos sistema (single-file - SF) e uso de todas as limas do sistema de modo sequencial (multiple-file - MF). Foram selecionados 50 incisivos inferiores humanos, distribuídos em cinco grupos (n = 10). Após verificação da dimensão radicular com limas manuais, todos os espécimes foram submetidos à microtomografia computadorizada (μCT) para análise de variação de volume, porcentagem de áreas não instrumentadas e de debris após o preparo. Os espécimes foram preparados com instrumentos WOG, de modo SF e MF. Os dados foram analisados quanto à normalidade e homogeneidade de variância. Conforme o desfecho, foram aplicados os testes de One-Way ANOVA seguido de Games-Howell ou Tukey, e Kruskal-Wallis seguido de Dunn. Todos os grupos apresentaram variação de volume total e independentemente da técnica utilizada, o terço cervical teve maior ampliação quando comparado ao apical (p < 0.05). Em relação à porcentagem de áreas não instrumentadas e de debris foram observadas diferenças significativas para WOG Medium versus WOG Small a WOG Medium (p < 0.05). Ambas as técnicas, SF e MF, proporcionaram variação de volume após o preparo, com persistência de áreas não instrumentadas e de debris. Contudo, melhores resultados ocorerram quando houve maior ampliação do canal radicular.
The Development of Situ Rawalumbu Tourism Area Use To Create Green and Blue Zone In Bekasi City
Authors: Sudarwani Margareta Maria , Eni Sri Pare , Simatupang Sahala , Widati Galuh 
Published: May 2021

Situ adalah wadah genangan air di atas permukaan tanah yang terbentuk secara alami maupun buatan yang sumber airnya berasal dari mata air, air hujan, dan/atau limpasan air permukaan. Situ dapat dimanfaatkan secara ekologis dan ekonomis yaitu sebagai habitat berbagai jenis hewan, tumbuhan, daerah resapan air, sumber air bagi kehidupan, pengendali banjir dan pengatur iklim, sebagai lahan perikanan, penghasil sumber daya alam, serta sarana wisata dan olahraga (Puspita et al, 2005). Situ Rawa Lumbu terletak di Kecamatan Rawa Lumbu, Kota Bekasi, Jawa Barat. Kondisi Situ Rawa Lumbu saat ini mengalami pendangkalan akibat pembuangan sampah/limbah dari pemukiman sehingga air mengalami pencemaran. Dengan demikian, kawasan di sekitar situ mengalami krisis air bersih. Hal ini berdampak kepada pengaruh lingkungan alam khususnya dalam konservasi Kawasan Situ. Sebagai solusi dari permasalahan tersebut, maka diperlukan usaha pelestarian kawasan situ Rawa Lumbu, perlunya penataan pada Kawasan Situ Rawa Lumbu yang ramah lingkungan dengan tujuan melestarikan Kawasan konservasi dan meningkatkan sumber daya manusia sekitar. Oleh karena itu Program Studi Arsitektur Universitas Kristen Indonesia merencanakan Kegiatan Usulan Desain Kawasan Wisata Situ Rawa Lumbu Kota Bekasi yang diharapkan dapat ikut berpartisipasi dalam pembangunan kota Jakarta dan sekitarnya, dengan memperhatikan prinsip Pembangunan Yang Berkelanjutan.
Kata kunci: kawasan wisata, pengembangan, situ rawalumbu, zona biru, zona hijau.
Kıbrıslı Mehmet Kâmil Paşa'nın İlk Sadaretinden Ayrılışı
Authors: GÖL Hacer 
Published: May 2021

Kâmil Paşa, Osmanlı bürokratları içerisinde ketum bir kişiliğe sahip olmasına rağmen, kendi düşüncelerini yazıya dökebilen ender kişilerden birisidir. Kâmil Paşa’nın ilk sadareti II. Abdülhamit zamanındadır. Yazdığı arizalar, layihalar, mektuplar ve hatıratı ile kendi düşüncelerini dile getirmiş aynı zamanda da yaşadığı dönem hakkında bilgi vermiştir. Kâmil Paşa dört kez Osmanlı sadaretine getirilmiş, bunlardan en uzunu ise ilk sadareti olmuştur.
Meşrutiyet, Cumhuriyet tarihimizin siyasal temellerinin atıldığı bir dönemdir. Aynı zamanda otoriteyi ele alma açısından bir üstünlük yarışının yaşandığı bir zaman dilimini de oluşturur. İstibdat olarak da adlandırılan II. Abdülhamit yönetiminde, parlamento kapatılarak ve Babıali’nin yetkileri en aza indirilerek, kendi otoritesini üstün kılmaya çalışılmıştır. Bu nedenle de zaman zaman birçok kişi ile –sadrazamı da dâhil- çeşitli tartışmalar yaşamıştır. Özellikle siyasal geleneğimizin temellerinin de atıldığı düşünüldüğünde bu dönemin olayları yanı sıra önemli şahsiyetlerinin de araştırılması kaçınılmazdır. Makalenin amacı dört kez sadarete gelmiş olan ve bunlardan en uzunu ilk sadareti olan Kâmil Paşa'nın ilk sadaretinden ayrılmasının siyasi nedenlerini ortaya koymaktır.