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Artykuły w czasopismach na temat "Banjo technique"
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He, Xiang Dong, Wei Qi i Yan Jin. "Robust Reliability Design of Banjo Flange Based on Bayesian Theory". Advanced Materials Research 753-755 (sierpień 2013): 1603–6. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.1603.
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The perturbation method, bayesian statistics theory, the reliability optimization design, the reliability sensitivity technique and robust design are employed to present a practical and effective approach for the robust reliability design of the Banjo flange under incomplete information. The theoretical formulae of robust reliability design for the Banjo flange under incomplete information are obtained. The respective program can be used to obtain the robust reliability design parameters of the Banjo flange under incomplete information accurately and quickly.
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Zhang, Yimin, Xiangdong He, Qiaoling Liu i Bangchun Wen. "Robust Reliability Design of Banjo Flange With Arbitrary Distribution Parameters". Journal of Pressure Vessel Technology 127, nr 4 (12.06.2005): 408–13. http://dx.doi.org/10.1115/1.2042478.
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The perturbation method, the Edgeworth series, the reliability-based optimization, the reliability sensitivity technique, and the robust design are employed to present a practical and effective approach for the robust reliability design of the Banjo flange with arbitrary distribution parameters on the condition of known first four moments of original random variables. The theoretical formulas of robust reliability design for the Banjo flange with arbitrary distribution parameters are obtained. The respective program can be used to obtain the robust reliability design parameters of the Banjo flange with arbitrary distribution parameters accurately and quickly.
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SUZUKI, Y., T. MATSUNAGA, S. SATO i T. YOKOI. "The Pins and Rubbers Traction System for Treatment of Comminuted Intraarticular Fractures and Fracture-Dislocations in the Hand". Journal of Hand Surgery 19, nr 1 (luty 1994): 98–107. http://dx.doi.org/10.1016/0266-7681(94)90059-0.
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The authors have developed a new skeletal traction system for comminuted intraarticular fractures and fracture-dislocations in the hand. The system consists of two or three Kirschner wires and rubber bands, and is easy to assemble. It is more compact and comfortable than the banjo splint, and equally effective, and it allows early motion of the affected digits. A description of the technique is followed by the clinical results of seven cases of severe articular injuries in the hand. At the time of follow-up, the average range of the affected PIP joint motion was about 80° The final active motion of the injured DIP joint ranged from 0 to 40° in flexion and that of the affected thumb (trapezia1 fracture) was not limited. The average follow-up period was 13.1 months.
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Casas, V. M., D. A. Chen, J. P. C. Mendes, M. P, Bastos, V. V. Valenzuela i C. A. M. Nepomuceno. "AUTOENCODER VARIACIONAL COMOTÉCNICA DE BALANCEAMENTO DE BANCO DE DADOS DE ÁUDIOS RESPIRATÓRIOS". Revista SODEBRAS 17, nr 197 (maj 2022): 19–30. http://dx.doi.org/10.29367/issn.1809-3957.17.2022.197.19.
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Chagas, Diego José, Chou Sin Chan i Alessandra Cristina Corsi. "Análise do banco de atendimentos da Defesa Civil do Estado de São Paulo". Anuário do Instituto de Geociências 33, nr 1 (1.06.2010): 35–43. http://dx.doi.org/10.11137/2010_1_35-43.
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In recent years the simple data organization is no longer a differential factor for institutions, since, depending on their volume, the traditional method of analysis and interpretation is extremely slow and costly. The use of data mining techniques is an alternative to allow this process semi-automatic. The objective of this work is to carry out a case study of data mining technique based on the WEKA software applied to hydrometeorological and geomorphological data which were collected in the Serra do Mar region of São Paulo State. Results obtained from the application of the association technique indicate that the presence of rock and boulders at terrains with scars and high declivity are relevant factors for the landslide occurrence.
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Zunic, Zora, Kevin Kelleher, Igor Celikovic, Predrag Ujic, Johan Paridaens, James Mclaughlin, Olivera Cuknic, Gordana Milic, Jugoslav NikoliC i Rodoljub Simovic. "A comparison of retrospective radon gas measurement techniques carried out in the Serbian spa of Niska Banja". Nuclear Technology and Radiation Protection 24, nr 2 (2009): 94–99. http://dx.doi.org/10.2298/ntrp0902094z.
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Indoor radon retrospective concentrations were obtained and compared using two radon measurement methods. Both methods rely on the measurement of the long-lived radon progeny 210Pb, collected either on the surfaces (surface trap technique), most frequently glass, or in a volume trap, usually sponge from furniture (volume trap technique). These techniques have been used to retrospectively estimate radon gas concentrations that have existed in dwellings in the past. The work presented here compares the results provided by the surface trap technique devised at the University College of Dublin, Ireland, and the volume trap technique devised at the Scientific Research Center, Mol, Belgium. The field campaign was carried out by the research team of the ECE Laboratory of the Vinca Institute of Nuclear Sciences at the spa of Niska Banja, identified as a region of Serbia with a high indoor radon and ground water radium and radon content.
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Udayana, IBN, Agus Dwi Cahya i Natalia Dewi Fendal. "INFLUENCE LIFESTYLE, PRODUCT QUALITY AND PRICE PERCEPTIONS ON PURCHASE DECISIONS IN THE COMPANY JUNK FOOD IN LABUAN BAJO (KFC)". E-Mabis: Jurnal Ekonomi Manajemen dan Bisnis 23, nr 2 (19.10.2022): 21–32. http://dx.doi.org/10.29103/e-mabis.v23i2.856.
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This study was conducted to examine the effect of lifestyle, product quality and price perception on Kentucky Fried Chicken in Labuan Bajo, either partially or simultaneously. The method used in this research is the explanatory method, with data collection techniques through questionnaires. The sampling technique used was purposive and proportional sampling. The sample is 105 people who are consumers who have bought/consumed KFC Labuan Bajo products. The analysis technique used is quantitative. Quantitative analysis using validity test, reliability test, classic assumption test, correlation coefficient, coefficient of determination, simple and multiple regression analysis, and significance test (t test and F test).The results of data analysis show that Lifestyle (X1) and Product Quality (X2) have a positive and significant effect on purchasing decisions, while Price Perception (X3) has no effect on purchasing decisions. Lifestyle (X1), quality of life (X2) and price perception (X3) have a significant simultaneous effect on Consumer Purchase Decisions (Y) for KFC products in Labuan Bajo. This shows that if Lifestyle, Product Quality and price perceptions are improved together, it will increase Consumer Purchase Decisions.
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Wajdi, Farid, i Zulfikar Putra. "The Implementation of Elementary Student Character Values Among the Bajo Tribe through Pancasila Values as Character Building". Social, Humanities, and Educational Studies (SHEs): Conference Series 4, nr 4 (23.04.2021): 95. http://dx.doi.org/10.20961/shes.v4i4.50591.
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<p><em>The purpose of this study was to determine the implementation of the character values of the Bajo tribe through the values of Pancasila as reinforcing character building in Bajo ethnic children, elementary school students. This type of qualitative research uses an ethnographic approach accompanied by data collection techniques through observation, interviews, and documentation. The data analysis technique in this study used the Spradley model. The findings of the research show that elementary school students on Masudu Island, most of whom have native Bajo ethnic backgrounds, have religious values, independence, discipline, social care, national spirit, mutual cooperation, and responsibility, as the implementation of Pancasila values and in accordance with character values. a nation that is seen in the daily lives of the children of the Bajo tribe who participate in studying at school, even though the school is located on one of the islands (in the sea).</em></p>
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Adhawiyah, Yayah Robiatul, i Mochammad Isa Anshori. "PERAN PEMASARAN MEDIA SOSIAL DALAM MENCIPTAKAN KEPUTUSAN PEMBELIAN MELALUI KESADARAN MEREK (Studi pada Instagram Clothing Line Bangjo)". Aplikasi Administrasi: Media Analisa Masalah Administrasi 22, nr 1 (11.09.2019): 34. http://dx.doi.org/10.30649/aamama.v22i1.113.
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The development and great effects of the internet are beginning to be understood by many people, and competitors have made many innovations and sales through the internet. Therefore social media marketing which is part of internet marketing was chosen as the focus of research. This study aims to determine how the influence of social media marketing on purchasing decisions through brand awareness. The independent variable studied was social media marketing (X), purchasing decision (Y) as the dependent variable, while the intervening variable was brand awareness (Z). The research approach used in this study is quantitative with explanatory methods (explanatory research). The object of research is Bangjo, a clothing business that carries out marketing through online media, Instagram. The population in this study is not known for its exact number, so that in the sample calculation a formula with an infinite population is used. The sampling technique used is non-probability sampling with purposive sampling technique. With the selected sample criteria are those who use Instagram and have made purchases on Bangjo Clothing line. Data collection techniques are carried out through observation, questionnaires, interviews and documentation. The results of the analysis show the influence of social media marketing which is able to influence the creation of brand awareness by 77.3%, social media marketing towards purchasing decisions 45.7%, brand awareness of purchasing decisions by 41%, social media marketing has impact on purchasing decisions through brand awareness by 31.7%. Keyword : Social media marketing, brand awareness, purchasing decision.
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PRUETT, LAURA MOORE. "Porch and Playhouse, Parlor and Performance Hall: Traversing Boundaries in Gottschalk'sThe Banjo". Journal of the Society for American Music 11, nr 2 (maj 2017): 155–83. http://dx.doi.org/10.1017/s1752196317000050.
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AbstractThis article reconsiders the cultural significance and historical impact of the well-known virtuosic piano compositionThe Banjoby Louis Moreau Gottschalk. Throughout the early nineteenth century, the banjo and the piano inhabited very specific and highly contrasting performance circumstances: black folk entertainment and minstrel shows for the former, white middle- and upper-class parlors and concert halls for the latter. InThe Banjo, Louis Moreau Gottschalk lifted the banjo out of its familiar contexts and placed it in the spaces usually privileged for the piano. Taking its inspiration from both African American and minstrel banjo playing techniques, Gottschalk's composition relaxed and muddled the boundaries among performance spaces, racial and class divisions, and two conspicuously different musical instruments in an egalitarian effort to demonstrate that, contrary to the opinions of some mid-nineteenth-century musical critics and tastemakers, both the piano and the banjo have a place in the shaping of American music culture.
Rozprawy doktorskie na temat "Banjo technique"
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Hensley, Lincoln. "Investigating Early Bluegrass Recording Techniques". Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/honors/597.
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This paper is about my investigation of early bluegrass recording techniques and the processes they used. After doing some extensive research, and compiling a database of black and white photographs from the time period, I felt I had enough information to assemble a team to try and produce the sounds, tonal qualities, and energy those recordings have. So John Kornhauser, Joshua Gooding, Hunter Berry, Sarah Griffin, along with myself, went to BigTone studios and tracked for two four hour sessions. BigTone studios has all of the vintage microphones, tape recorders, echo chambers, and out board equipment I need to replicate the same signal chain that was used on the early recordings. After the recording process, I mixed and mastered the songs to match the early recordings as closely as possible. We also recorded one song at ETSU’s studio that was all digital with new equipment to show the differences in the sound of analog versus digital recording. I have included both so that you can listen to each and determine for yourself if there is an audible difference, and if that difference is worth pursuing.
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Souza, Alexandre Morais de. "Critérios de seleção de sistemas de gerenciamento de banco de dados não relacionais em organizações privadas". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/100/100131/tde-26112013-181716/.
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Sistemas de Gerenciamento de Banco de Dados Não Relacionais (SGBDs NoSQL) são pacotes de software para gerenciamento de dados utilizando um modelo não relacional. Dado o atual contexto de crescimento na geração de dados e a necessidade que as organizações possuem em coletar grande quantidade de informações de clientes, pesquisas científicas, vendas e outras informações para análises futuras, é importante repensar a forma de se definir um SGBD adequado levando em consideração fatores econômicos, técnicos e estratégicos da organização. Esta é uma pesquisa relacionada com o estudo do novo modelo de gerenciamento de banco de dados, conhecido como NoSQL e traz como contribuição apresentar critérios de seleção para auxiliar consumidores de serviços de banco de dados, em organizações privadas, a selecionar um SGBD NoSQL. Para atender a este objetivo foi realizada revisão da literatura com levantamento bibliográfico sobre processo de seleção de software e de SGBDs, levantando critérios utilizados para este fim. Feito o levantamento bibliográfico, definiu-se o método de pesquisa como sendo a aplicação de um Painel Delphi, na modalidade ranking form. Por meio do painel foi possível determinar, após a realização de duas rodadas e participando um grupo de especialistas misto formado por gerentes, fornecedores de SGBD, acadêmicos, desenvolvedores e DBAs e DAs, os critérios mais relevantes para a escolha de um SGBD NoSQL, ordenados conforme pontuação obtida para cada critério. Os dados foram coletados por meio de questionário. A partir dos critérios identificados, foram feitas análises sobre os principais critérios de seleção de SGBDs NoSQL. Posteriormente, as conclusões e considerações finais contemplaram a análise dos resultados obtidos com o Painel Delphi. Como principal resultado alcançado, este estudo oferece uma visão realística acerca do modelo não relacional para gerenciamento de dados e apresenta os critérios mais importantes que indicam plausível a adoção de SGBDs NoSQL.Database Management Systems Not Relational (NoSQL DBMSs) are software packages for data management using a non-relational model. Given the current context of growth in data generation and the need that organizations have to collect vast amount of customer information, scientific research, sales and other information for further analysis, it is important to rethink how to define a suitable DBMS considering economic, technical and strategic organization. This research is concerned with the study of the new management model database, known as NoSQL, and brings the present contribution selection criteria to assist service consumers Database, private organizations, to select a NoSQL DBMS. To satisfy this objective was reviewed the literature with bibliographic on software selection process and DBMSs, identifying criteria used for this purpose. After completion of the literature, was defined the search method with application of a Delphi panel, by the ranking form mode. Through the panel could be determined, after the completion of two rounds and attending a mixed group of experts formed by managers, DBMS vendors, academics, developers, DBAs and DAs, the most relevant criteria for choosing a NoSQL DBMS, ordered according score for each criteria. Data were collected through a survey. From the identified criteria, analyzes were made on the main selection criteria of NoSQL DBMSs. Subsequently, the conclusions and final considerations were made with analysis of the results obtained with the Delphi panel. The main result achieved, this study offers a realistic view about the non-relational model for managing data and presents the most important criteria that indicate plausible the adoption of NoSQL DBMSs.
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Amorim, Ana Shirley de Vasconcelos Oliveira Evangelista. "Ave! Mossor?! : os mecanismos discursivos sobre o epis?dio da resist?ncia ao bando de Lampi?o". Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16176.
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Previous issue date: 2010-06-22Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
This thesis has as objective the interdiscursive relations in the process of language construction in use in the poetic and in the journalistic spheres, with the purpose of perceiving how the genre news is constituted in different fields of social activity, as well as to analyze the argumentative processes that structure the written discourses about the resistance episode to the group of Lampi?o in Mossor? in the year of 1927. The corpus of the research is constituted by the news of the period informed in the printed newspapers: Correio do povo and O Nordeste, both from Mossor?/RN, and the narratives presented in the cord?is de acontecido : Mossor? in the resistance to the group of Lampi?o; Lampi?o in Mossor? in 1927, and Mossor? attacking to the group of Lampi?o, all potiguar poets. The analysis of the texts had as theoretical background the studies of: The texts analysis had as theoretical background The Discourse Analysis; The Argumentation Theory and the studies about Discourse Genres. We focused our discussion in the emphasis given to the news in the discursive perspective of the social-historic memory constructed in the cord?is, from ideological values (political, economical, religious etc.) that pass to be a fundamental element in the constitution of the image of the resistance. Methodologically, this is a documental research, since it makes use essentially of the written document. Regarding to the nature of the data, the research is characterized as a qualitative one. In the analysis, we considered the argumentative techniques adopted in the defense of the thesis, the meaning effects suggested, and the genres mentioned, that revealed to us the manner in which the episode was informed by the newspapers and the cord?is. That way, we affirm, based on the positions assumed by the announcers of the genres analyzed who defended clearly positions in favor of the defense of Mossor?, that the relation between both is captured interdiscursively, since they are asked by the same ideology, and converge to the same discursive formation, defending identical positions, and structuring their discussions with resembling argumentative techniques, reason by which take us to believe that the discourse presented in that social activity demonstrates and develops traces of a manipulation of the subject. In this case, the discursive construction of the text points towards determining standard of repetition, since the linguistic context is characterized in the journalistic field, and in the poetic field assuming, in the first instance, a local expression
Esta disserta??o tem como objetivo investigar as rela??es interdiscursivas no processo de constru??o da linguagem em uso nas esferas po?tica e jornal?stica, a fim de perceber como o g?nero not?cia ? constitu?do em diferentes campos de atividade social, bem como, analisar os processos argumentativos que estruturam os discursos escritos sobre o epis?dio da resist?ncia ao bando de Lampi?o em Mossor? no ano de 1927. O corpus da pesquisa ? constitu?do pelo notici?rio da ?poca veiculado nos jornais impressos Correio do povo e O Nordeste, ambos de Mossor?/RN, assim como, as narrativas presentes nos cord?is de acontecido: Mossor? na resist?ncia ao bando de Lampi?o; Lampi?o em Mossor? em 1927 e O ataque de Mossor? ao bando de Lampi?o, todos de poetas potiguares. A investiga??o dos textos teve como suporte te?rico A An?lise do Discurso; A Teoria da Argumenta??o e os estudos sobre G?neros do Discurso. Tem como foco o (re)enquadre dado ? not?cia na perspectiva discursiva da mem?ria s?cio-hist?rica constru?da nos cord?is a partir de valores ideol?gicos (pol?tico, econ?mico, religioso) que passam a ser elemento fundamental na constitui??o da imagem da resist?ncia. Metodologicamente, esta ? uma pesquisa de cunho documental, uma vez que faz uso essencialmente do documento escrito. No que tange ? natureza dos dados, a pesquisa caracteriza-se como qualitativa de base interpretativista. As an?lises revelaram o modo como foi realizada a abordagem do epis?dio na constru??o discursiva do texto. Considera as t?cnicas argumentativas adotadas na defesa da tese, os efeitos de sentido sugeridos e os g?neros abordados, o que revela a maneira como o epis?dio foi veiculado pelos jornais e pelos cord?is. Assim sendo, a constru??o do texto aponta determinados padr?es de repeti??o, visto que o contexto lingu?stico, caracteriza-se no campo jornal?stico e no campo po?tico por assumir, em primeira inst?ncia, uma express?o local
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Gimenes, Gabriel Perri. "Advanced techniques for graph analysis: a multimodal approach over planetary-scale data". Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-26062015-105026/.
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Applications such as electronic commerce, computer networks, social networks, and biology (protein interaction), to name a few, have led to the production of graph-like data in planetary scale { possibly with millions of nodes and billions of edges. These applications pose challenging problems when the task is to use their data to support decision making processes by means of non-obvious and potentially useful patterns. In order to process such data for pattern discover, researchers and practitioners have used distributed processing resources organized in computational clusters. However, building and managing such clusters can be complex, bringing technical and financial issues that can be prohibitive in a variety of scenarios. Alternatively, it is desirable to process large scale graphs using only one computational node. To do so, we developed processes and algorithms according to three different approaches, building up towards an analytical set capable of revealing patterns, comprehension, and to help with the decision making process over planetary-scale graphs.Aplicações como comércio eletrônico, redes de computadores, redes sociais e biologia (interação proteica), entre outras, levaram a produção de dados que podem ser representados como grafos à escala planetária { podendo possuir milhões de nós e bilhões de arestas. Tais aplicações apresentam problemas desafiadores quando a tarefa consiste em usar as informações contidas nos grafos para auxiliar processos de tomada de decisão através da descoberta de padrões não triviais e potencialmente utéis. Para processar esses grafos em busca de padrões, tanto pesquisadores como a indústria tem usado recursos de processamento distribuído organizado em clusters computacionais. Entretanto, a construção e manutenção desses clusters pode ser complexa, trazendo tanto problemas técnicos como financeiros que podem ser proibitivos em diversos casos. Por isso, torna-se desejável a capacidade de se processar grafos em larga escala usando somente um nó computacional. Para isso, foram desenvolvidos processos e algoritmos seguindo três abordagens diferentes, visando a definição de um arcabouço de análise capaz de revelar padrões, compreensão e auxiliar na tomada de decisão sobre grafos em escala planetária.
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Rodrigues, Diego de Azevedo, i 981997982. "A Study on Machine Learning Techniques for the Schema Matching Networks Problem". Universidade Federal do Amazonas, 2018. https://tede.ufam.edu.br/handle/tede/6801.
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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Schema Matching is the problem of finding semantic correspondences between elements from different schemas. This is a challenging problem, since the same concept is often represented by disparate elements in the schemas. The traditional instances of this problem involved a pair of schemas to be matched. However, recently there has been a increasing interest in matching several related schemas at once, a problem known as Schema Matching Networks, where the goal is to identify elements from several schemas that correspond to a single concept. We propose a family of methods for schema matching networks based on machine learning, which proved to be a competitive alternative for the traditional matching problem in several domains. To overcome the issue of requiring a large amount of training data, we also propose a bootstrapping procedure to automatically generate training data. In addition, we leverage constraints that arise in network scenarios to improve the quality of this data. We also propose a strategy for receiving user feedback to assert some of the matchings generated, and, relying on this feedback, improving the quality of the final result. Our experiments show that our methods can outperform baselines reaching F1-score up to 0.83.
Casamento de Esquemas é a tarefa de encontrar correpondências entre elementos de diferentes esquemas de bancos de dados. É um problema desafiador, uma vez que o mesmo conceito geralmente é representado de maneiras distintas nos esquemas.Tradicionalmente, a tarefa envolve um par de esquemas a serem mapeados. Entretanto, houve um crescimento na necessidade de mapear vários esquemas ao mesmo tempo, tarefa conhecida como Casamento de Esquemas em Rede, onde o objetivo é identificar elementos de vários esquemas que correspondem ao mesmo conceito. Este trabalho propõe uma famı́lia de métodos para o problema do casamento de esquemas em rede baseados em aprendizagem de máquina, que provou ser uma alternativa viável para o problema do casamento tradicional em diversos domı́nios. Para superar obstáculo de obter bastantes instâncias de treino, também é proposta uma técnica de bootstrapping para gerar treino automático. Além disso, o trabalho considera restrições de integridade que ajudam a nortear o processo de casamento em rede. Este trabalho também propõe uma estratégia para receber avaliações do usuário, com o propósito de melhorar o resultado final. Experimentos mostram que o método proposto supera outros métodos comparados alcançando valor F1 até 0.83 e sem utilizar muitas avaliações do usuário.
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Garro, Linck Leonel. "Estudio de líquidos confinados en sistemas porosos por RMN a campo bajo". Doctoral thesis, 2021. http://hdl.handle.net/11086/20359.
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Tesis (Doctor en Física)--Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía, Física y Computación, 2021.Los sistemas porosos son parte fundamental de nuestra vida cotidiana y de la industria. En particular, en la industria de la construcción y del petróleo conocer las características de los sistemas porosos es de vital interés para maximizar la eficiencia de los procesos productivos. En esta tesis se implementaron equipo de RMN de campo bajo para caracterizar líquidos de diferente naturaleza confinados en sistemas mesoporosos (poros de tamaños nanométricos). Se estudió las interacciones entre el líquido confinado y la matriz que lo contiene y se obtuvo información sobre la influencia de las interacciones químicas en los procesos difusivos de los líquidos. Además, se realizaron mediciones de los tiempos de relajación transversal T2 durante procesos de evaporación de agua confinada, tanto en muestras modelo de sílice, como de rocas de yacimientos de petróleo. Con estos experimentos se observaron los diferentes entornos microscópicos presentes en las muestras y se caracterizaron a las matrices porosas con tiempos característicos de los procesos de evaporación.
Porous materials are essentials not only in industry, but in our daily lives. In particular, knowing the characteristics of porous materials is especially important in the construction and oil industry to maximize the efficiency of the productive processes. In this Thesis, low field NMR was used to characterize different kinds of liquids confined in mesoporous systems (nanometric scale porous). The interactions between the confined liquid and the surface were studied. Information about the influence of chemical interactions in the diffusive processes of the different liquids was obtained. T2 transverse relaxation times were measured during the evaporation process of water confined in model silica samples and in sandstones rocks . These experiments allowed the observation of different microscopic environments in the samples and the rocks were characterized with characteristic times for the evaporation process.
publishedVersion
Fil: Garro Linck, Leonel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía, Física y Computación; Argentina.
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Bernardes, Luís Araújo Matos Caldeira. "Trends in corneal transplant indications and techniques in Coimbra, Portugal: 2011 -2016". Master's thesis, 2017. http://hdl.handle.net/10316/81896.
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Trabalho Final do Mestrado Integrado em Medicina apresentado à Faculdade de MedicinaIntrodução: O objectivo deste estudo é determinar as recentes mudanças nas indicações para transplantes de córnea e no uso de tecido corneano em Coimbra.Métodos: os dados relativos a todos os transplantes realizados no Centro Hospitalar e Universitário de Coimbra (CHUC) entre 2011 e 2016 foram colhidos e compilados no Banco de Olhos dos CHUC. Analisámos retrospectivamente a idade, género, diagnóstico primário e técnica de transplante utilizada. Resultados: Ao longo dos 6 anos considerados, foram realizados 711 transplantes de córnea. A indicação para transplante mais frequente foi o re-transplante, responsável por 207 (29.2%) procedimentos, seguido da queratopatia bolhosa com 125 (17.6%) casos e queratocone, com 118 (16.6%) casos. Não foram encontradas alterações estatisticamente significativas nas indicações entre os 6 anos do estudo. No total, foram realizadas 506 (71.3%) queratoplastias penetrantes (PK), 129 (18.2%) Descemet’s Stripping Automated Endothelial Keratoplasty (DSAEK) e 64 (9.0%) Deep Anterior Lamellar Keratoplasty (DALK). Ao longo dos anos, observámos uma diminuição estatisticamente significativa dos números de PK, acompanhada de um aumento da realização de DALK e DSAEK.Conclusões: os registos do banco de olhos dão-nos a capacidade de avaliar a evolução dos transplantes de córnea. As indicações permaneceram estáveis ao longo da janela temporal considerada. Comparando com outros estudos, apresentamos mais re-transplantes, menos queratocones (particularmente comparando com estudos mais antigos), e percentagens semelhantes de queratopatia bolhosa e distrofias da córnea. Em termos de técnica cirúrgica, este estudo contribui para evidenciar a popularidade crescente de queratoplastias lamelares em oposição a PK. Em conclusão, as indicações e técnicas para transplante de córnea continuam em evolução rápida, e merecem investigação continuada de modo a optimizar as actividades de bancos de olhos e centros de transplantação.
Introduction: The aim of this study is to determine the recent trends in corneal transplant indications and corneal tissue use in Coimbra. Methods: data concerning all corneal transplantation procedures performed at Centro Hospitalar e Universitário de Coimbra (CHUC) between 2011 and 2016 were collected and stored at the CHUC Eye Bank. We retrospectively analysed recipient age, gender, primary diagnosis and transplantation technique.Results: Across the 6 years considered, 711 corneal transplants were reviewed for analysis. The most frequent indication for corneal transplantation was regraft, which accounted for 207 (29.2%) of all procedures, followed by bullous keratopathy, with 125 cases (17.6%) and keratoconus, with 118 cases (16.6%). No statistically significant shift in indications for grafting was identified over the 6-year period (p = 0.70). All years accounted, penetrating keratoplasty (PK) accounted for 506 procedures (71.3%), Descemet’s stripping automated endothelial keratoplasty (DSAEK) for 129 (18.2%), and deep anterior lamellar keratoplasty (DALK) for 64 (9.0%). Over the 6 years, we observed a statistically significant decline in the numbers of PK, accompanied by an increase in DSAEK and DALK. Conclusions: Eye bank registries provide an effective means to evaluate corneal transplantation evolution. Transplant indications have remained stable across the time frame considered. Compared with other series, we report more repeat grafts, less keratoconus (particularly when comparing with older studies) and similar percentages of bullous keratopathy and corneal dystrophies. In terms of surgical technique, this study provides further evidence of the increasing popularity of lamellar keratoplasties, in opposition to PK. In conclusion, the indications and techniques for corneal transplantation continue to evolve rapidly, and merit continued investigation to optimize the activities of eye banks and transplant centres.
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Karam, Diego Edgardo. "Dinámica de un micronadador autopropulsado en un flujo de cizallamiento". Bachelor's thesis, 2017. http://hdl.handle.net/11086/5762.
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Tesis (Lic. en Física)--Universidad Nacional de Córdoba, Facultad de Matemática, Astronomía, Física y Computación, 2017.Utilizando simulaciones numéricas del tipo Dinámica de Stokes, se estudia el movimiento de micronadadores sometidos a un flujo de cizalla. Resulta de gran interés entender la interacción entre la manera en que se propulsa el micronadador y el flujo ambiente. En particular, si de esta resulta alguna orientación de nado favorecida. En este trabajo se partió desde una puesta a punto del código de Dinámica de Stokes, adaptándolo para el estudio de micronadadores de interés. Se encontró que los nadadores cuyos cuerpos tienen simetría de revolución se comportan de manera similar, describiendo órbitas similares a la de los esferoides autopropulsados. Finalmente, se estudia un nadador con cuerpo en forma de esferoide y con un flagelo helicoidal rígido y rotante. En este caso se observa una tendencia del nadador a orientarse en la dirección de la vorticidad del flujo. Esto puede entenderse a partír del análisis de la dinámica orientacional del cuerpo del nadador sin autoporpulsión sometido a la acción del flujo de cizalla.
The movement of microswimmers under a shear flow is studied using numerical simulations of the Stokesian Dynamics type. It is of great interest to understand the interaction between a swimmer's self-propulsion and the ambient flow. In particular, if this results in some favored swimming orientation. The start point in this work is a set-up of the Stokes Dynamics code, adapting it for the study of microswimmers of interest . It was found that swimmers whose bodies have a revolution symmetry behave similarly, describing orbits similar to that of self-propelled spheroids. Finally, a swimmer with a body in the shape of a spheroid and with a rigid and rotating helical flagellum is studied. In this case, a tendency of the swimmer to orientate itself in the direction of the vorticity of the flow is observed. This can be understood as part of the analysis of the dynamics orientation of the body of the swimmer without self-propulsion subjected to the action of shear flow.
Książki na temat "Banjo technique"
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Davies, Philippa. Aprenda a funcionar bajo la presión. Bogotá, Colombia: Editorial Norma, 2003.
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Schutyser, Sebastian. Banco: Adobe mosques of the Inner Niger Delta. Milan: 5 Continents, 2003.
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Weidlich, Joe. The Early Minstrel Banjo: Technique and Repertoire. Centerstream Publications, 2004.
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Bremer, Michael. Banjo Aerobics: A 50-Week Workout Program for Developing, Improving and Maintaining Banjo Technique. Leonard Corporation, Hal, 2013.
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Sheridan, Dick. ASAP Beginning Bluegrass Banjo: Learn How to Play the Bluegrass Way. Hal Leonard, 2019.
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Warren, Mike. Banjo Ukulele Techniques. Primedia eLaunch LLC, 2018.
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Weidlich, Joseph, i Pete Seeger. Early Pete Seeger Banjo Techniques. Centerstream Publishing, 2021.
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Bremer, Michael. Clawhammer Cookbook: Tools, Techniques and Recipes for Playing Clawhammer Banjo. Leonard Corporation, Hal, 2014.
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Bremer, Michael. Clawhammer Cookbook: Tools, Techniques and Recipes for Playing Clawhammer Banjo. Leonard Corporation, Hal, 2014.
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Bremer, Michael. Clawhammer Cookbook: Tools, Techniques and Recipes for Playing Clawhammer Banjo. Leonard Corporation, Hal, 2014.
Znajdź pełny tekst źródłaCzęści książek na temat "Banjo technique"
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Sudhalter, Richard M. "Guitars, Solo and in Combination". W Lost Chords, 517–50. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780195055856.003.0021.
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Abstract It wasn’t exactly a shot in the dark. His father, Fred Van Eps, was a revered music figure, whose technique and imagination had lifted the banjo out of its folk and salon tradition into a new virtuosity. He’d begun recording on Edison wax cylinders in the 1890s, and since 1914 his Van Eps Trio had never stopped making successful records. Songwriters and fellow-musicians wrote specialty pieces for him, trying to push his skill to its limits. (One such vehicle, “Banjo Ballet,” by the trio’s pianist, Felix Arndt, took on a new name when Arndt found a surefire way of impressing a new girlfriend. As “Nola,” it became a lasting popular favorite.)
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Jones-Bamman, Richard. "An Apprentice to Ghosts". W Building New Banjos for an Old-Time World. University of Illinois Press, 2017. http://dx.doi.org/10.5622/illinois/9780252041303.003.0006.
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This chapter focuses on builders (Bob Thornburg, Jeff Menzies, John Bowlin, Allen Hart, Jim Hartel, George Wunderlich and Pete Ross) who have chosen exclusively to create instruments that are either inspired by or meticulously replicate the earliest examples of the banjo. These range from instruments made of gourds and other repurposed materials to banjos from the 1840s forward that evince the beginnings of industrialization in instrument manufacture. While individual motivations differ, the thread that unites these makers is a desire to draw attention to the most conflicted elements of this instrument’s history, i.e., its origins among enslaved populations and its cooptation by white entertainers involved in blackface minstrelsy. The response among old-time banjoists has been surprisingly positive, in large part because the playing technique required is very similar to what is currently favored, a fact that strengthens the historical connections between these nearly forgotten instruments and their contemporary counterparts. Yet, as all of these builders have discovered, restoring these early banjos to the old-time musical community necessitates a re-examination of the sources of much of the repertoire and an expansion of the conceptions of a shared, albeit mythical past. These topics are covered in greater detail in Chapter Six.
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Allsbrook Jr., William C. "Overview of Banjo History". W Making Music, 3–6. University Press of Mississippi, 2023. http://dx.doi.org/10.14325/mississippi/9781496845801.003.0001.
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The origins of the banjo are discussed along with historical context. Roughly 300,000 slaves or 2.5% of the West African slave trade entered the United States, mostly between 1691-1810. Enslaved peoples were from displaced nationalities, ethnic groups, cultures, and languages, and they brought various instruments of their culture with them to the Americas. Over time, the gourd banjo evolved from various influences. White Americans learned to play the banjo, at different places and different times, through African and European cultural exchanges. The banjo appeared in blackface entertainment prior to the Revolutionary war and, therefore, prior to minstrelsy and the Civil War. Following the Civil War, advances in banjo playing techniques, publications, design and manufacturing occurred. “Hillbilly,” later “Country,” music emerged from the Southern Appalachians in the early 1900s, but the banjo was usually not a featured instrument. Earl Scruggs deserves the major credit for the emergence of the banjo in Bluegrass music and Scruggs-style playing is the most common type played today. Other innovations in the music of the banjo, including melodic style, have occurred to the present day.
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Jones-Bamman, Richard. "God Is in the Details". W Building New Banjos for an Old-Time World. University of Illinois Press, 2017. http://dx.doi.org/10.5622/illinois/9780252041303.003.0004.
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This chapter explores designing and building a banjo for the old-time musical community. It is not a how-to guide, but is rather an extended discussion of the various processes involved, ranging from the choice of materials to the basic design parameters that are dictated by this style of music and its adherents. The chapter is focused on a single builder (Will Fielding), whose banjo building course the author observed and documented. Yet it also features input from myriad other contemporary builders (Kevin Enoch, Bob Flesher, Noel Booth, Greg Galbreath, Wayne Sagmoen, Brooks Masten, Pete Ross, Bart Reiter, Jason and Pharis Romero, Chuck Waldman), whose contributions demonstrate both general agreement with Fielding and occasionally divergent opinions about specific materials or techniques. The result is a rich overview of the current banjo making community, its continuous grounding in past building practices, and its contributions to the old-time musical sphere.
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Krakauer, Ben. "Distinctive Qualities of Southwestern Ohio Bluegrass". W Industrial Strength Bluegrass, 175–88. University of Illinois Press, 2021. http://dx.doi.org/10.5622/illinois/9780252043642.003.0011.
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Regional bluegrass mixed earlier rural influences with those of urban dislocation and factory life, yielding significant innovations that inspired later bluegrass worldwide. Scruggs-style banjo techniques were adapted by mandolinist Jesse McReynolds and guitarists Bill Napier and George Shuffler. Tavern acoustics required piercing tones, and percussive plucked-stringed instruments were prized over the fiddle. The Osborne Brothers and Red Allen, Jim and Jesse, and Jimmy Martin brought trio vocal harmony to the forefront. “Melodic” five-string banjo, later developed elsewhere, drew upon Noah Crase’s innovations. Sonny Osborne’s unconventional musical vocabulary inspired newgrass. Bobby Osborne, Frank Wakefield, and Dorsey Harvey influenced generations of mandolinists. King Records owner Syd Nathan encouraged bluegrass’s earliest guitar flatpicking solos. Lillimae Whitaker and Katie Laur were pioneer woman bandleaders.
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Jones-Bamman, Richard. "An Homage to the Past". W Building New Banjos for an Old-Time World. University of Illinois Press, 2017. http://dx.doi.org/10.5622/illinois/9780252041303.003.0005.
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This chapter and the one that follows (Chapter Five) draw on interviews with twenty-two banjo makers in the United States and Canada to explore the issues facing these individuals who strive to maintain their preferred connections with the old-time music community without losing sight of the artistic and personal motivations that drew them into this undertaking initially. Chapter Four is focused on those who create instruments most closely adhering to the common expectations of old-time banjo players, factors that include certain structural and design features as well as playability and tone production. What unites all of those in this chapter is the influence of the past on their own efforts, but how this is defined is quite different from one person to the next. For some, this means replicating existing instruments from a specific era or locale, and involves learning techniques that long ago passed from common practice. For others, the past is purely inspirational, providing ideas to be expanded upon and subject to new interpretation. The chapter concludes with a consideration of tone production, how this has changed in recent decades, and how banjo builders approach what is clearly a highly subjective topic. The builders profiled here include Kevin Enoch, Chuck Waldman, Wayne Sagmoen, Kevin Fore, Jason and Pharis Romero, Greg Galbreath and Brooks Masten.
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Wiyonoputri, Wiwien Tribuwani, Buntu Marannu Eppang i Noel Scott. "The Development of Stories of Bajo Mola in Wakatobi National Park". W Global Perspectives on Strategic Storytelling in Destination Marketing, 52–73. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-3436-9.ch004.
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Tourism is part of the experience economy, and more and more governments are interested in improving their tourism experiences. This improvement can add value for visitors as well as increasing income for local people. There are several techniques that are used in developing experiential tourism products, and this chapter focuses on development through the use of storytelling, particularly applying interpretation approach, principles, and techniques to create a story-based experiences well-known as interpretive experience. This chapter provides a case study of the development of interpretive experiences by the Bajo sea-farer, the largest sea nomad descendant in the world, who live in Mola, Wakatobi National Park, Indonesia, a UNESCO Man and Biosphere site and listed in their World Heritage Tentative List. Through series of workshops, community investigation, simulation, and tryouts, they developed four interpretive experiences strongly related to Bajo culture, namely Dolphin Watching Tour, Cultural Walking Tour, Village Canoeing Tour, and Star-Telling.
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Maia Júnior, Júlio Mário, i Hilderline Câmara de Oliveira. "People management practices: In the light of the analysts of public financial institutions and private of Rio Grande do Norte". W CONNECTING EXPERTISE MULTIDISCIPLINARY DEVELOPMENT FOR THE FUTURE. Seven Editora, 2023. http://dx.doi.org/10.56238/connexpemultidisdevolpfut-056.
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Technological advancement and the digital revolution 4.0 have been breaking paradigms, bringing eras closer together, requiring the derivation of flows, processes, treadmills, structural and behavioral models. As an example of this condition, the financial market coexists, on a daily basis, with the experiment of the new, the new modality of transaction, with the new tools of concession and with the recovery of credits, as well as with new currencies. With this, the Human Resources area of these ended up having to recreate itself, especially through the incorporation of the techniques and practices of People Management and Leadership. Given this scenario, the present research has as general scope to analyze the models and practices of People Management in the relationship between executives and analysts/clerks who work both in the context of public banks, especially Banco do Nordeste do Brasil S.A., Banco do Brasil and Caixa Econômica Federal, as well as in private ones, particularly Santander, Bradesco and Itaú Unibanco, whose agencies are found in the state of Rio Grande do Norte (RN). To this end, a descriptive research was undertaken, with a quantitative approach. The data collection technique was the questionnaire, which was applied to 113 bank employees of the Employees Union in banking establishments in the state of Rio Grande do Norte. Data analysis was performed using the statistical program Statistical Package for the Social Sciences (SPSS). As for the results, in this research, 48.7% of the participants are male and 51.3% are female. 42.5% of the interviewees occupy only the position of banking analyst/clerk/technician/agent/executive cashier, and 37.2% of these have more than 10 (ten) years in the banking activity. The importance of the analyst's work for the proper functioning of a banking unit was predicted as an intact figure and referenced by 61.6% of the respondents. Even though organizations have formalized and disseminated Corporate Governance structures among employees, a quantity that reached the mark of 82.3%, in addition to Codes of Ethical Conduct and Integrity, the prototypes of strategic management of people currently experienced are leaving crossed bridges and cracked links, hitherto integrated, highly fragile.
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Brimhall, George H., John H. Dilles i John M. Proffett. "The Role of Geologic Mapping in Mineral Exploration". W Wealth Creation in the Minerals Industry, 221–41. Society of Economic Geologists, 2005. http://dx.doi.org/10.5382/sp.12.11.
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Abstract Geologic mapping provides many types of information essential both in exploration for new mineral deposits and during subsequent mining. Geologic mapping of outcrops is used to describe the primary lithology and morphology of rock bodies as well as age relationships between rock units. This information allows delineation of ore-bearing host rocks and postore rocks that obscure or truncate ores. Mapping gathers structural information, including attitudes of veins and postore faults that can be used to predict the geology in the subsurface or laterally under postore rocks, and improves the utility of geophysical data for refinement of subsurface targets. Mapping of the mineralogy of hydrothermal alteration zones, ore minerals, igneous rocks hosting ores, and oxidized and leached rocks that commonly occur at the surface above sulfide-bearing ores can be used in conjunction with geochemical data to produce zonation patterns to target potential ore or to define prospective corridors of exotic mineralization. Similarly, regional geologic mapping in regions with both Paleozoic-Mesozoic overthrusts and Cenozoic normal faults such as the Paleozoic and Mesozoic thrust belt of the United States Cordillera and Basin and Range Province can define prospective windows into basement where mineralization such as Carlin-type gold deposits may occur. In general, geologic mapping underpins the construction of three-dimensional geologic models or hypotheses that guide exploration and discovery and, when geologic time is considered, produces the fourdimensional space-time models necessary for understanding of primary ore formation processes and postdepositional modification by secondary surficial and tectonic processes. Geologic mapping has been used extensively for exploration for more than 100 years and we predict it will continue to be essential although the tools for recording, compiling, and synthesizing data are evolving rapidly and improve data integration in the office and most recently in the field. Both traditional and future methods rely on field identification skills of the geologist to record salient new geologic data. This review describes the traditional paper- and pencil-based mapping system developed and used extensively by the Anaconda Company from 1900 to 1985 and, because of its versatility, adapted by many other geologists in industry and academia. This and similar systems allow geologically complex and diverse data to be recorded and plotted on a base map, including lithology, rock alteration and mineralization features, relative age relationships, and structural features such as faults and veins. Traditional paper-recorded geologic mapping data are now commonly converted to digital format in the office. We document use of mapping at different stages of the mine-life cycle from general regional-scale geologic mapping to regional- to district-scale exploration targeting, to deposit assessment and ore-reserve definition, through mine planning and production. Examples of mapping described herein include the Ann Mason porphyry copper deposit, Yerington district, Nevada; the Bajo de la Alumbrera mine; Argentina; the El Abra-Fortuna-Chuquicamata districts of Chile; and the Pioneer Mountains of Montana. Beyond the use of traditional paper-based mapping methods, recent technological advances include global positioning systems, pen tablet computers, palm computers, and laser ranging devices that all support direct (paperless) field-based digital geologic mapping. Improvements in computation speed, memory, data storage, battery life, durability, screen visibility, and portability have made digital mapping practical in general field mapping, mine sites, and advanced projects. Portable digital-electronic instrumentation allows the field geologist rapid access to digital data bases that include geologic maps and photographic and remotesensing imagery with automatic registration and scale independence. Another example described here, using digital mapping systems in the heavily forested portions of the Pioneer Mountains of Montana, shows how on-line GPS communicating directly to the pc tablet and digital orthophotographs made mapping sufficiently effective so as to discover a previously unknown granitic pluton with a concentric breccia zone. These new digital mapping tools may thus improve the efficiency of mapping and support a scientist in the field with unprecedented opportunities to map where field work has been difficult before. Visualization of geophysical or geochemical data together with geology and synoptic aerial imagery at any scale while mapping provides an integrated data base that facilitates identification of crucial geologic relationships. Digital techniques improve the potential for making conceptual leaps by exploring the available integrated data sets as a field geologist maps, and may in the future lead to more comprehensive three-dimensional geologic models for mineral deposits by effectively using information technology. The authors conclude that both paper and digital systems are powerful and each has certain advantages. However, the central challenge remains the training and nurturing of highly skilled field geologists motivated to practice their profession, welcoming both the rigors of intensive field work and the excitement of scientific discovery. It is surmised here that digital mapping technology may help attract an increasingly computer-literate cadre of new practitioners of mapping into mineral resource exploration.
Streszczenia konferencji na temat "Banjo technique"
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Reips, Lisiane, i Carmem Satie Hara. "Integração e Rotulação Automatizada de Dados sobre o Cnidário Physalia physalis, usando a Geolocalização como Referência". W Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2022. http://dx.doi.org/10.5753/sbbd_estendido.2022.21851.
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Classification techniques in machine learning models have been effectively applied to text and image recognition. But for any and every application, data need to be trained and tested. In order to achieve good performance in the classification process, these data need to be reliably labeled, which makes the process expensive and time-consuming. In this paper, we propose an approach to reduce the cost of manual labeling a database composed of Portuguese man of war (Physalia physalis) sightings on Brazilian beaches. The technique is based on integrating Instagram posts with newspaper articles based on their temporal and spatial proximity. The ultimate goal is to use these labeled data for training a classification technique in the machine learning process.
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Schmitz, Christian, Serigne K. Mbaye, Edimar Manica i Renata Galante. "ACERPI: An approach for ordinances collection, information extraction and entity resolution". W Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2021. http://dx.doi.org/10.5753/sbbd.2021.17869.
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Ordinances are documents issued by federal institutions that contain, among others, information regarding their staff. These documents are accessible through public repositories that usually do not allow any filter or advanced search on documents’ contents. This paper presents ACERPI, an approach which identifies the people mentioned in the ordinances to help the user find the documents of interest. ACERPI combines techniques to discover, obtain, convert and structure documents, extract information, and link employees entities. Experiments were performed on two real datasets and demonstrated a recall of 72.7% for our named entity recognition model trained with only 534 samples and F1 measure of 90% in the efficacy of the entity resolution technique.
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Magalhães, Arlino, José Maria Monteiro i Ângelo Brayner. "Main Memory Database Instant Recovery". W Anais Estendidos do Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2023. http://dx.doi.org/10.5753/sbbd_estendido.2023.231997.
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Main Memory Databases (MMDBs) technology handles the primary database in Random Access Memory (RAM) to provide high throughput and low latency. However, volatile memory makes MMDBs much more sensitive to system failures. The contents of the database are lost in these failures. As a result, systems may be unavailable for a long time until the database recovery process has been finished. Therefore, novel recovery techniques are needed to repair crashed MMDBs as quickly as possible. This thesis presents MM-DIRECT, a recovery technique that enables MMDBs to schedule transactions immediately after the system startup. The approach also implements a tuple-level consistent checkpoint to reduce the recovery time. To validate the proposed approach, experiments were performed in a prototype implemented on the Redis database. The results show that the proposed instant recovery technique effectively provides high transaction throughput rates even during the recovery process and normal database processing.
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Laigner, Rodrigo, Sérgio Lifschitz, Marcos Kalinowski, Marcus Poggi i Marcos Antonio Vaz Salles. "Towards a Technique for Extracting Relational Actors from Monolithic Applications". W XXXIV Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2019. http://dx.doi.org/10.5753/sbbd.2019.8814.
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Relational actors, or reactors for short, integrate the actor model with the relational data model, providing an abstraction for enabling actor-relational database systems. However, as a novel model of computation for databases, there is no extensive work on reasoning about reactor modeling. To close this gap, this paper aims to propose as well as evaluate a technique to extract reactors from a monolithic system. For evaluation, we selected a REST-based open-source OLTP system in which a decomposition to microservices was conducted and applied our technique on its predecessor monolithic version. Our technique led to the same set of decisions, regarding table and behavior selection, taken by experts when decomposing the same system into microservices. The proposed technique can be seen as a first step towards supporting practitioners in decomposing OLTP systems into reactors.
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Mendonça, André L. C., Felipe T. Brito i Javam C. Machado. "Privacy-Preserving Techniques for Social Network Analysis". W Anais Estendidos do Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2023. http://dx.doi.org/10.5753/sbbd_estendido.2023.25632.
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With the increasing concerns over data privacy, preserving the privacy of individuals in social network analysis has become crucial. This tutorial provides a comprehensive overview of methods and techniques to protect individual privacy while conducting social network analysis. We perform a deep analysis of differential privacy, which is a rigorous mathematical framework to protect individual privacy while enabling accurate analysis of network structure and characteristics. Additionally, this tutorial explores a variety of examples and case studies to demonstrate the application of these techniques in practical scenarios.
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Magalhães, Arlino, Angelo Brayner i José Maria Monteiro. "Main memory database recovery strategies". W Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2022. http://dx.doi.org/10.5753/sbbd_estendido.2022.21861.
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Main Memory Database (MMDB) technology has been an efficient alternative for high-performance, real-time, mission-critical applications. However, MMDBs are more vulnerable to crashes due to memory volatility. Although the recovery component looks similar on disk- and memory-oriented systems, these systems differ dramatically in the way they implement their architectural components. This tutorial aims to provide a complete review of MMDB recovery techniques. To achieve this goal, the tutorial reviews key database recovery concepts and MMDB implementations. Only then do we introduce MMDB recovery techniques and discuss recovery strategies for a representative sample of modern MMDBs.
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Oliveira, Rafael Pereira de, Fernanda Baião, Javam Machado, Ana Carolina Almeida i Sérgio Lifschitz. "Autonomic Combination and Selection of Tuning Actions". W Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2022. http://dx.doi.org/10.5753/sbbd.2022.225212.
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Combining database tuning actions has neither a precise formulation nor a formal approach to solving it. It is a complex and relevant problem in database research, both for the DBA manual solutions and automatic ones using specialized software. This work proposes an automated method for generating and selecting combined tuning solutions for relational databases. It addresses how to mix solutions while still preserving both technological constraints and available computational resources. The results show that our technique can produce more efficient combined solutions than independent local solutions.
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Silva Jr., Daniel, Aline Paes, Esther Pacitti i Daniel de Oliveira. "FReeP: towards parameter recommendation in scientific workflows using preference learning". W Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2018. http://dx.doi.org/10.5753/sbbd.2018.22232.
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Scientific workflows are a de facto standard for modeling scientific experiments. However, several workflows have too many parameters to be manually configured. Poor choices of parameter values may lead to unsuccessful executions of the workflow. In this paper, we present FReeP, a parameter recommendation algorithm that suggests a value to a parameter that agrees with the user preferences. FReeP is based on the Preference Learning technique. A preliminary experimental evaluation performed over the SciPhy workflow showed the feasibility of FReeP to recommend parameter values for scientific workflows.
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Bezerra, Eduardo, Augusto Fonseca, Adriano Cabo, Fabio Porto i Mariza Ferro. "Precipitation Nowcasting using Data Augmentation". W Anais Estendidos do Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2023. http://dx.doi.org/10.5753/sbbd_estendido.2023.25647.
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This paper proposes a simple data augmentation technique specifically designed to mitigate the data unbalancing problem in precipitation nowcasting. We consider the existence of one or more observational systems, each one comprised of a set of (either weather or rain gauge) stations. We use simulated data coming from the ERA5 numerical model to complement precipitation observations made by rain gauge stations, and use the resulting synthetic observations to augment data for a given weather station. We present preliminary results training a machine learning model using this data augmentation technique. These results show that the technique can be useful to improve the predictive performance of the resulting forecasting model.
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Marinho, Carlos S. S., Emanuel F. Coutinho, José S. Costa Filho, Leonardo O. Moreira, Flávio R. C. Sousa i Javam C. Machado. "A Predictive Load Balancing Service for Cloud-Replicated Databases". W Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2017. http://dx.doi.org/10.5753/sbbd.2017.174094.
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Cloud computing emerges as an alternative to promote quality of service for data-driven applications. Database Management Systems must be available to support the deployment of cloud applications resorting to databases. Many solutions use database replication as a strategy to increase availability and decentralize the workload of database transactions between replicas. By the distribution of database transactions between replicas, load balancing techniques improve the computational resources utilization. However, several solutions use the current state of the database service in making decisions for the distribution of transactions. This paper proposes a predictive load balancing service for replicated cloud databases.
Raporty organizacyjne na temat "Banjo technique"
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Azqueta-Gavaldón, Andrés, Marina Diakonova, Corinna Ghirelli i Javier J. Pérez. Sources of economic policy uncertainty in the euro area: a ready-to-use database. Madrid: Banco de España, sierpień 2023. http://dx.doi.org/10.53479/33155.
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In this paper, we build a publicly-available database of economic policy uncertainty (EPU) indicators based on the methodology proposed by Azqueta-Gavaldón, Hirschbühl, Onorante and Saiz (2023), which uses topic modelling techniques to identify distinct components of EPU. This database is regularly updated and can be accessed on the Banco de España’s website. Currently, the dataset covers the four largest countries in the euro area, namely Spain, Italy, France, and Germany. Our data coverage is continually expanding to include more euro area countries. Additionally, we compute the aggregated EPU indexes for the euro area. This comprehensive dataset and the resulting euro area indexes provide valuable tools for researchers, policymakers and analysts to assess and monitor the dynamics of economic policy uncertainty in real time.