bluuebunny/crossref_metadata_2025_split huggingface dataset:
Identification of Optimal Drilling Parameters for Reduction of High-Frequency Torsional Oscillations by Combined Approach with Modeling and Real-Time Analysis of High-Frequency Measurements
Authors: Patil Parimal Arjun , Ochoa Oscar Nicolas 
Published: February 2020

Abstract
Maximizing drilling performance by pushing the limits of drilling tools is the key to reduce overall drilling cost. The interplay of complex parameters such as lithology, drilling parameters, drilling experience, downhole tool reliability, and the operational process help us to identify the limiting factors. Drilling dysfunction could deteriorate the reliability of downhole drilling tools including the overall drilling performance by causing damaged bits, failure of downhole electronic components, torsional fatigue of drillstring, over-torqued connections, etc. Precise modeling of dynamic responses of a bottomhole assembly in a given formation can help to identify operating limitations as well as post job analysis.
The wellbore-drillstring interaction and well face-drill bit interaction are the sources of excitation of torsional oscillations. Stick-slip is one of the common and well-known torsional oscillation that usually occurs at low frequencies &lt;1 Hz. High-frequency torsional oscillations (HFTO) are also recorded in the field by using high-bandwidth downhole vibration monitoring tools. HFTO occurs at much higher frequencies; &gt;10Hz to 500 Hz. This paper summarizes the HFTO phenomenon that causes high tangential accelerations and torsional loads within the bottomhole assembly (BHA) during drilling in critical formations. HFTO modeling that is validated with high-speed measurements helps to identify tangential accelerations and torsional loads across the BHA components.
This paper highlights the benefits of modeling the rotary steerable system (RSS) BHA for HFTO in order to identify the point in the BHA that is subjected to the highest tangential acceleration and torsional loads. Real time monitoring for drilling optimization of RSS BHA shows that the HFTO modeling and post-job data analysis of high-frequency data confirms the distribution of tangential acceleration and torsional loads along the BHA. The paper also highlights the accuracy of the HFTO modeling based on results of pre-job modeling and post-job high-speed data analysis from drilling runs. Based on the analysis and the study, recommendations for optimal BHA design and operational parameters are provided to yield maximum footage per run and improved BHA performance.
High-frequency torsional oscillations in the BHA can be mitigated if adequate BHA design, drilling parameters, and procedures are implemented. The in-depth analysis of HFTO with accurate modeling and high-frequency measurements can be used to develop a knowledge base to further optimize the drilling process, reduce non-productive time, realize fewer trips for failures, extend the on-bottom drilling time, reduce maintenance costs, and increase the drilling efficiency and performance.
High-Frequency Drilling Data Analysis to Characterize Water-Ice on the Moon
Authors: Joshi Deep , Eustes Alfred , Rostami Jamal , Hanson Jenna , Dreyer Christopher 
Published: February 2020

Abstract
This paper discusses the evolution of a pattern recognition algorithm that utilizes the high-frequency drilling data to characterize the water-ice on the Moon. The algorithm developed here can estimate the moisture content of a grout sample by analyzing the trend of drilling data. Such an algorithm can be used by NASA and private organizations in near-future to identify and produce water from Lunar Poles.
An auger based rotary drilling rig with a drilling data acquisition system was designed and fabricated. The data acquisition system records drilling parameters like RPM, drilling depth, torque, and weight on bit at 1000Hz. The data is then filtered to remove electromagnetic interference. The drilling tests were conducted on meticulously designed grout block samples which contained the lunar soil simulant with specific geotechnical properties, replicating lunar subsurface at a specific pressure, temperature condition, and moisture contents. Simultaneously, the UCS of the grout block was tested in a lab to correlate the drilling data to specific grout strength.
The drilling data recorded in the homogenous samples and the data collected during UCS tests were used to develop and validate a pattern recognition algorithm. The algorithm was tested on layered grout samples containing layers with varying strength. The UCS estimated by this algorithm was then correlated to the moisture content using the lab observations and published literature. The algorithm could distinctly detect the boundaries between different layers, estimate the UCS, and moisture content in real-time. The high-frequency drilling data was also used to identify different dysfunctions and optimize drilling operations. Trends of MSE, RPM, and torque were analyzed to detect auger choking, inefficient cuttings transport, and drilling vibrations.
On the Moon, this algorithm can be invaluable in optimizing the drilling operations, estimating the spatial distribution of various subsurface layers improving our understanding of the subsurface lunar stratigraphy. It can also be used to estimate the quantity of water available on the lunar poles, which will be essential in planning the manned and robotic lunar missions in the coming years.
Short-term clinical outcomes of percutaneous transforaminal endoscopic discectomy in treating adolescents under 25 years old with massive lumbar disc herniation
Authors: He Hai-Chao , Zhang Yong-jin 
Published: February 2020

Abstract
Background: In the last decades, endoscopic techniques to treat lumbar disc herniation (LDH) have gained popularity in clinical practice. However, few studies have described the safety and efficacy of percutaneous transforaminal endoscopic discectomy (PTED) in treating adolescent massive LDH. This study aims to evaluate the surgical outcomes of PTED in treating adolescent patients with massive LDH. Methods: Between October 2012 and December 2018, retrospective analysis of 13 adolescent patients with single segment massive LDH at the Department of Spinal Surgery of Affiliated Dongyang Hospital of Wenzhou Medical University. All patients were followed up for at least 12 months (range 12–20 months). The patients’ lower limb pain was evaluated using visual analogue scale (VAS) scores and the Oswestry Disability Index (ODI). Patient satisfaction was evaluated using the MacNab outcome scale. Clinical outcomes were measured preoperatively, at 3 days, 1 months, 3 months, 6 month and 12 months postoperatively. Results: The VAS score for leg pain was 7.08 ±1.12 preoperatively and 3.23±1.01, 3.0 ± 1.01, and 2.62 ± 0.51, and 2.32± 0.48, and 1.46± 0.52, at 3 days, 1 months, 3 months, 6 months and 12 months postoperatively respectively. The ODI scores was 51.51 ±3.08 preoperatively and 21.74±1.15, 14.81 ± 1.50, and 2.78 ± 0.64, at 3 months, 6 months and 12 months postoperatively respectively. These postoperative scores were all significantly different when compared with preoperative scores (P < 0.001). According to the modified MacNab outcome scale, excellent was obtained in 7 patients, good was obtained in 5 patients, and fair was obtained in 1 patient, and 92.31% of these patients had excellent and good outcomes at the final follow-up. There were no complications related to surgery, and no spinal instability was detected. Conclusion: The PTED is an effective and safe surgical method for the treatment of adolescent patients with massive LDH, but high-quality randomized controlled trials are still required to further verify these findings.
The Impact of Internet use frequency on Non-suicidal self injurious behavior and Suicidal Ideation among Chinese Youth: An empirical study based on Gender perspective
Authors: Xin Moye , Yang Xueyan , Liu Kun , Boke Bilun Naz 
Published: February 2020

Abstract
Background: We attempted to find if there were gender differences in Non-suicidal self injurious (NSSI) behaviors and Suicidal ideation among Chinese youth, then analyze the impact of internet use frequency on these variables among youth of different genders. Methods: Based on the survey data from 6 high-schools and 4 universities in 4 cities in China, the gender difference in NSSI behaviors and Suicidal ideation and their related factors were analyzed in the study. Results: There was no significant gender difference in NSSI behaviors among Chinese youth, yet females reported significantly higher intensity of suicidal ideation compared to males; internet use frequency could explain the prevalence of NSSI behaviors and Suicidal ideation by gender, to some categories. Conclusions: The gender difference of NSSI engagement among Chinese youth was not statistically significant; while females had higher suicidal ideation than males; the overuse of social softwares was found to be a risk factor to both NSSI engagements and suicidal ideations for both genders; males would engage less NSSI behaviors when they spent more time on knowledge sharing softwares while might have more suicidal ideation when they spent too much time on gaming.
Periodontal Surgery Intervention for Gingival Smile Correction - Case Report
Authors: Sangalette Beatriz S. , Vieira Larissa V. , Verri Felippo R. , Mestrener Leandro R. , Mestrener Sandra R. , Toledo Gustavo L. , Graziela Magro Miriam , Piras Fernanda F. 
Published: February 2020

Introduction:
The success of anterior rehabilitation requires more skills than knowledge. It is necessary that the professional has updates on a new approach to obtain the best result considering the high degree of the exigency of these cases. The relationship between red and white esthetic is known and consolidated in the literature. Then, to achieve success in an esthetic smile is indispensable to apply periodontal surgery associated with restorative technique.

Methods:
In this report, a 28-year-old female patient sought care in a private clinic with a major cosmetic complaint due to disproportion of the clinical crown and gingival smile.

Result:
After planning, a clinical crown increase was performed, followed by the labial repositioning technique after the healing time of the initial surgery.

Conclusion:
It can be concluded that some of the surgical techniques, demonstrated in the literature, for gingival correction are feasible when correctly indicated. The best esthetic results will be achieved when the professional can understand the necessity to correct the disharmony of white and red esthetic.
Piezoelectric Energy Harvesting Methodologies using Ambient Mechanical Vibration: Design Perspective and Challenges
Authors: Asthana Prateek , Khanna Gargi 
Published: February 2020

Background and Objective:
Piezoelectric energy harvesting is an emergent research
area for unobtrusive power supply for fully autonomous micro-scale devices.

Method:
The method of energy harvesting is to utilize waste ambient mechanical vibrations to
generate electrical energy through the piezoelectric effect.

Results and Conclusion:
The present work highlights the major advances made in the field of micro-
electromechanical systems based on piezoelectric energy harvester on extracting ambient vibrations
and converting them into usable electric power. The present study explores energy harvesting
approaches for portable electronics and self-powered wireless network nodes. The performance
matrices like device physics, volume, operating frequencies, design and materials have
been thoroughly analyzed in this work. Conventional cantilever fabrication steps have also been
discussed. Finally, guidelines for future research and performance enhancements in the field of
Piezoelectric Energy Harvesting (PEH) at micro scale have been discussed.
A pesquisa brasileira em Estudos Métricos da Informação: proximidade entre pesquisadores de destaque e áreas afins
Authors: Grácio Maria Cláudia Cabrini , Oliveira Ely Francina Tannuri de 
Published: February 2020

Esta pesquisa objetiva identificar e analisar os pesquisadores brasileiros e internacionais de destaque na área de Estudos Métricos da Informação, no Brasil, a proximidade estabelecida entre eles, na perspectiva dos pesquisadores brasileiros, as disciplinas, áreas ou subáreas do conhecimento, que contribuem para o desenvolvimento teórico e metodológico, de forma a oferecer subsídios e instrumentos para os Estudos Métricos da Informação. Os objetivos serão analisados à luz da natureza das pesquisas declaradas por essa comunidade científica, a fim de contribuir para identificar e visualizar as possíveis similaridades e diferenças teórico-metodológicas adotadas por esses grupos. Como procedimento de pesquisa, utilizou-se o questionário como instrumento de levantamento de dados. Do universo de 42 pesquisadores brasileiros, 18 (~43%) responderam ao questionário enviado. A rede de cocitação indica um alto grau de coesão no grupo de pesquisadores brasileiros e estrangeiros, com denotada presença destes últimos. Em relação às áreas, subáreas e disciplinas do conhecimento, que contribuem para o desenvolvimento epistemológico, teórico e metodológico, foram destacadas as grandes áreas de Exatas, Ciências Humanas e Ciências Sociais Aplicadas, com a primeira delas sendo citada pela maioria dos respondentes. A grande área das Ciências Humanas aparece com a segunda mais citada. A Ciência da Informação, Cientometria, Comunicação Científica, Metodologia Científica e Bibliometria compõem as subáreas citadas dentro da grande área das Ciências Sociais. Conclui-se apontando a paridade entre os indicadores oriundos de dados qualitativos e quantitativos e a complementação das duas análises.
Publicações ampliadas: aspectos da integração de dados de pesquisa
Authors: Santos Daiane Barrili dos , Rockembach Moisés 
Published: February 2020

Este artigo apresenta resultados de pesquisa, que teve como objetivo principal propor um panorama de integração entre repositórios de dados de pesquisa e publicações científicas baseado no modelo de publicações ampliadas. O modelo de análise deste estudo foi composto por três fases, iniciando pela revisão de literatura da área, passando pela identificação de repositórios de dados do diretório re3data.org que utilizam ligações baseadas no modelo de publicação ampliada e, por fim, a inspeção das interfaces dos repositórios selecionados. Verificou-se uma necessidade crescente na adoção de uma infraestrutura compatível com as publicações ampliadas, tornando-se importante a utilização de requisitos para as interfaces dos repositórios de dados de pesquisa. O cruzamento de informações realizado neste estudo permitiu um maior entendimento do quanto é relevante o uso de cada um dos requisitos estudados, como também foi possível compreender as consequências caso estes requisitos não estejam contemplados nas interfaces de repositórios. A partir da investigação e do aprofundamento sobre o tema, foi possível ampliar o conhecimento e detectar os elementos apropriados para propor um panorama de integração entre um repositório de dados de pesquisas e publicações científicas baseando-se em um modelo de publicação ampliada, como também destacar as vantagens da utilização deste modelo.
A gênese do Repositório Filatélico Brasileiro: uma experiência interdisciplinar nas Humanidades Digitais
Authors: Salcedo Diego , Bezerra Vinícius Cabral Accioly 
Published: February 2020

Apresenta o projeto em andamento intitulado “Repositório Filatélico Brasileiro – REFIBRA”. Explica as ações de curadoria digital realizadas pelo Grupo de Pesquisa IMAGO vinculado ao Departamento de Ciência da Informação da Universidade Federal de Pernambuco. De forma inédita no país, o projeto tem como objetivo desenvolver um repositório digital do conjunto de documentos filatélicos brasileiros produzidos desde 1843. O artigo indica aplicações de tecnologias computacionais articuladas à interdisciplinaridade das humanidades digitais. Como metodologia faz a revisão bibliográfica desde alguns elementos propostos na literatura científica especializada da Biblioteconomia, Ciência da Informação, Computação e Filatelia. Aponta os critérios utilizados até então para a escolha da tecnologia computacional mais eficaz e eficiente. Ilustra uma proposta preliminar de aplicação web semântica para o tratamento informacional de 32 selos postais comemorativos brasileiros. Utiliza o padrão de metadados Dublin Core, com necessárias adequações, o sistema de visualização Linked Data e o Resource Description Framework. Os resultados obtidos e divulgados neste artigo colaboram com o avanço da pesquisa e são evidência de que o campo das humanidades digitais articula-se com outras áreas, enaltecendo sua faceta interdisciplinar, mas, também aprendendo como certa articulação de tecnologias computacionais com demandas informacionais podem resultar em modelos de alta qualidade
A mediação da Informação como instrumento para a construção de uma História Regional
Authors: Santos Leandro Silva , Flores Fúlvio Torres 
Published: February 2020

Trata- se de um estudo que possui como temática a mediação e uso da informação, e tem como objetivo, disponibilizar em site imagens da edição do Jornal “O Pharol” durante sua existência como periódico e relacionadas à Extensão Rural: educação. Para esta pesquisa foi feita análise documental e bibliográfica. Inicialmente foram realizadas o levantamento do acervo, digitalização das edições do jornal e conversão em formato digital (PDF) com análise historiográfica do período de 1915 a 1935 primeira República e por fim o levantamento bibliográfico sobre aspectos relacionados ao tema tais como: Ciência da Informação, Informação, Museus, Memória, História e Extensão Rural: no presente estudo demonstraremos como o jornal “O Pharol” tratou a Extensão Rural na região no período em que esteve em funcionamento através de suas edições, disponibilizando através de imagens indexadas e classificadas em site as informações que julgamos mais relevantes para a construção da memória coletiva e da história local.
A comunicação científica através do Repositório Institucional da Universidade Federal da Bahia: levantamento da Área I
Authors: Santos Davilene Souza , Roza Flávia Goulart 
Published: February 2020

A comunicação científica tem passado por transformações a partir do advento da internet, a exemplo do Movimento de Acesso Aberto, que incentiva a disponibilização de conteúdo gratuitamente, importante marco que reflete de forma direta na democratização do conhecimento. A pesquisa em questão visa adentrar-se em uma das estratégias propostas por esse movimento, conhecida como Via Verde e representada pelos repositórios institucionais. A implantação destes representa o engajamento das instituições produtoras de conhecimento ao movimento, nesse sentido, esse estudo pretende verificar a adesão dos Programas de Pós-Graduação da Área I da Universidade Federal da Bahia ao seu Repositório Institucional. O objetivo geral consiste em analisar a disponibilização de conteúdo resultante da produção científica desses programas entre 2010 e 2018. O levantamento de dados tem ocorrido a partir da observação do objeto de estudo e aplicação de questionário aos coordenadores dos programas, para compreendermos os seus conhecimentos sobre acesso aberto e os critérios utilizados junto à comunidade acadêmica, para o autoarquivamento do conteúdo produzido. A pesquisa tem caráter bibliográfico, de natureza aplicada e abordagem qualitativa e quantitativa. Busca-se conhecer as políticas internas adotadas pelos programas dessa área, e ações junto à comunidade acadêmica para fomentar o autoarquivamento, visando contribuir com o crescimento do acervo do Repositório e ampliar o acesso a produção científica e tecnológica da Área I, que refletem na pesquisa em Ciência e Tecnologia. Como resultados parciais, podemos destacar que tem sido satisfatória a investigação no que tange a identificação dos critérios mais utilizados para incentivar a disponibilização de conteúdo.
Operations of Points on Elliptic Curve in Affine Coordinates
Authors: Futa Yuichi , Okazaki Hiroyuki , Shidama Yasunari 
Published: February 2020

Summary
In this article, we formalize in Mizar [1], [2] a binary operation of points on an elliptic curve over GF(p) in affine coordinates. We show that the operation is unital, complementable and commutative. Elliptic curve cryptography [3], whose security is based on a difficulty of discrete logarithm problem of elliptic curves, is important for information security.
A Modified Standardized Method to Extract and Store Insect Hemolymph with Use of a Glass Capillary
Authors: Migdał Paweł , Murawska Agnieszka , Roman Adam 
Published: February 2020

Abstract
Hemolymph is the “blood” circulating in the entire insect body. Analysis of this fluid gives information about the condition of the insect. The most precise analyses are conducted on insects’ hemolymph suspended in 0.6% physiological saline (NaCl). Most current hemolymph extraction methods are either difficult or do not provide pure material, the contamination of collected insect “blood” can change results. This study aimed to develop a technique for extract hemolymph, both easy and without risk of contaminating derived material. The presented method is a modification of available ways to extract, store and transport hemolymph with the use of a glass capillary. For the development of this technique, adult worker honey bees (Apis mellifera L.) were used. The method required such basic equipment as a glass capillary, sterile tweezer, Eppendorf tube and physiological saline. The collected hemolymph were frozen and hence sent in a glass capillary to another laboratory for analysis.
Wind Load Design of Photovoltaic Power Plants by Comparison of Design Codes and Wind Tunnel Tests
Authors: Bogdan Ovidiu , Creţu Dan 
Published: February 2020

Abstract
Wind load design of the ground-mounted photovoltaic (PV) power plants requires interpretation of the design code considering the particularities of these structures. The PV power plants consist on systems of several solar panels. Wind load pressure coefficient evaluation, by design code, for a single solar panel considered as a canopy roof, neglect the group effect and the air permeability of the system. On the other hand, the canopy roofs are structures with medium serviceability, but the PV power plants are structures with low serviceability. This paper discuss the difficulties of the wind load design for the PV power plants ground mounted in Romania and compares the Romanian, German, European and American wind design code specifications with the parameters provided by the wind tunnel test, for this type of structures. For Romanian wind load design an evolution of the 1990, 2004 and 2012 editions of the design codes specifications is also studied. Evaluation of the internal resultants for the structural elements of the PV panel, considering the pressure coefficients and the force coefficients, conducts to different results. Further code explanations and design specifications are required for wind design of the PV power plants.