Validation of Subject Specific Computed Tomography-based Finite Element Models of the Human Proximal Tibia using Full-field Experimental Displacement Measurements from Digital Volume Correlation

Quantitative computed tomography-based finite element (QCT-FE) modeling is a computational tool for predicting bone’s response to applied load, and is used by musculoskeletal researchers to better understand bone mechanics and their role in joint health. Decisions made at the modeling stage, such as the method for assigning material properties, can dictate model accuracy. Predictions of surface strains/stiffness from QCT-FE models of the proximal tibia have been validated against experiment, yet it is unclear whether these models accurately predict internal bone mechanics (displacement). Digital volume correlation (DVC) can measure internal bone displacements and has been used to validate FE models of bone; though, its use has been limited to small specimens. The objectives of this study were to 1) establish a methodology for high-resolution peripheral QCT (HR-pQCT) scan acquisition and image processing resulting in low DVC displacement measurement error in long human bones, and 2) apply different density-modulus relationships and material models from the literature to QCT-FE models of the proximal tibia and identify those approaches which best predicted experimentally measured internal bone displacements and related external reaction forces, with highest explained variance and least error. Using a modified protocol for HR-pQCT, DVC displacement errors for large scan volumes were less than 19μm (0.5 voxels). Specific trabecular and cortical models from the literature were identified which resulted in the most accurate QCT-FE predictions of internal displacements (RMSE%=3.9%, R2>0.98) and reaction forces (RMSE%=12.2%, R2=0.78). This study is the first study to quantify experimental displacements inside a long human bone using DVC. It is also the first study to assess the accuracy of QCT-FE predicted internal displacements in the tibia. Our results indicate that QCT-FE models of the tibia offer reasonably accurate predictions of internal bone displacements and reaction forces for use in studying bone mechanics and joint health

Efeitos De Variações Sazonais E Métodos De Coleta Sobre A Composição Mineral De Própolis De Colmeias De Apis Mellifera Linnaeus

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)The effects of seasonal variations and the methods of collection of propolis produced by Africanized honey bees Apis mellifera Linnaeus, 1758, on the composition of constituent minerals such as magnesium (Mg), zinc (Zn), iron (Fe), sodium (Na), calcium (Ca), copper (Cu), and potassium (K) were evaluated. Propolis was harvested from 25 beehives by scraping or by means of propolis collectors (screen, “intelligent” collector propolis [ICP], lateral opening of the super [LOS], and underlay method). During the one-year study, the propolis produced was harvested each month, ground, homogenized, and stored in a freezer at -10 ºC. Seasonal analyses of the mineral composition were carried out by atomic absorption spectrophotometry and the results were evaluated by analysis of variance (ANOVA), followed by Tukey-Kramer’s test to compare the mean values (p<0.05). The results showed that seasonal variations influence the contents of 5 minerals (Mg, Fe, Na, Ca, and Cu), and the propolis harvesting method affects the contents of 4 minerals (Mg, Zn, Fe, and Ca). © 2016, Instituto Internacional de Ecologia. All rights reserved.762396401CNPq, Conselho Nacional de Desenvolvimento Científico e TecnológicoConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

HISTÓRIA E HISTORIOGRAFIA DA EDUCAÇÃO NO ESTADO DO PARANÁ: TRAJETÓRIAS E PERSPECTIVAS

Review of the book: ORLANDO, Evelyn de Almeida; MACHADO JR., Cláudio de Sá (Orgs.). História da Educação no Paraná: caminhos da pesquisa e do ensino. Porto Alegre, RS: Editora Fi, 2020. &nbsp;Reseña del libro: ORLANDO, Evelyn de Almeida; MACHADO JR., Cláudio de Sá (Orgs.). História da Educação no Paraná: caminhos da pesquisa e do ensino. Porto Alegre, RS: Editora Fi, 2020.Resenha da obra: ORLANDO, Evelyn de Almeida; MACHADO JR., Cláudio de Sá (Orgs.). História da Educação no Paraná: caminhos da pesquisa e do ensino. Porto Alegre, RS: Editora Fi, 2020

Impressos, discursos e moralidade nos regimes autoritários instituídos no Brasil

Resenha da obra:COWAN, Benjamin A. Securing sex: morality and repression in the making of Cold War Brazil. Chapel Hill, NC: University of North Carolina Press, 2016

Hydrology of the Colorado Tailings Area, Butte, MT

During the past 7 to 8 years, the Colorado Tailings have been the site of numerous studies on potential heavy metal contribution to Silver Bow Creek (SBC). Three years ago the Montana Department of State Lands-Abandoned Mine Lands Bureau (DSL-AML) initiated, through the Montana Bureau of Mines and Geology (MBMG), a study of reclamation and removal alternatives for this site. Since that time the tailings have received increased interest with the placement of SBC on the Environmental. Protection Agency\u27s Superfund. Numerous studies predate the ongoing Superfund and MBMG studies, with contradictory results. Loading rates in SBC have been reported to vary from 0 to 36 lb/day for copper and 300 to 320 lb/day for zinc from above to below the tailings (4). Since the initiation of the MBMG study, numerous changes have taken place upstream which complicate comparisons with historic data; those being the Anaconda Minerals Company zero discharge for the Weed Concentrator and the suspension of mining in Butte. Results from the MBMG study show a substantial degradation of ground water quality from outside (upgradient) of the tailings through the tailings, as do surface water results, but to a lesser degree, from above to below the tailings.

Evaluation of Motor Changes and Toxicity of Insecticides Fipronil and Imidacloprid in Africanized Honey Bees (Hymenoptera: Apidae)

Honey bees are important pollinators and are essential in beekeeping. Honey bees get exposed to systemic pesticides while foraging in contaminated fields, and it is important to know the toxicity (LD50) and evaluate the impacts of bees’ exposure to these molecules. Fipronil and imidacloprid are systemic pesticides widely used in Brazil and other countries. The objective of this study was to determine the LD50 (24 hours) and evaluate motor changes in Africanized honey bee foragers exposed to lethal and sublethal doses of fipronil and imidacloprid. To determine the LD50, foraging honey bees were exposed by ingestion and contact to five doses of fipronil (Regent 800WG®) and imidacloprid (Appalus 200SC®) insecticides. After 24 hours of exposure, the number of dead bees was counted, and the results were subjected to probit analysis. The motor activity of bees exposed by ingestion or contact to LD50 and sublethal doses (1/500th of the LD50) of both pesticides was assessed 4 hours after exposure using a behavioral observation box. The ingestion and contact with LD50 of fipronil were 0.0528±0.0090 and 0.0054±0.0041 μg/bee, respectively; the ingestion and contact with LD50 of imidacloprid were 0.0809±0.0135 and 0.0626±0.0080 μg/bee, respectively. Bees exposed to lethal and sublethal doses of both insecticides experienced significant motor alterations compared to the control, except for exposure to sublethal doses of fipronil by contact. Fipronil and imidacloprid are highly toxic and promote motor changes in bees. Thus, it is important to establish management methods to reduce pollinators’ exposure to these pesticides

Forjar o futuro avaliando o presente: Ditadura militar, adesões, negociações e (re)configurações na escola tiradentes (Curitiba 1972-1984)

Abstract: This text aims to investigate the reverberations of Law nº. 5.692/1971 in education in Paraná during the years 1972-1984. For this, in view of a game of scale, the adhesions, negotiations and reconfigurations of the teaching proposal developed at Escola Tiradentes will be investigated. This institution served as a model for designing school education to be developed throughout the state. I start from the assumption that through the institution's document analysis it is possible to understand the political culture introjected in the educational scope and how it contributed to the formation of the adolescent being at the time. Keywords: Political Culture; Education; Dictatorship; Legislation.Este texto tem como objetivo investigar sobre as reverberações da Lei nº. 5.692/1971 na educação paranaense durante os anos de 1972-1984. Para isso, diante de um jogo de escala, serão investigados as adesões, negociações e reconfigurações da proposta de ensino desenvolvida na Escola Tiradentes. Essa instituição serviu como modelo para projetar o ensino escolar a ser desenvolvido em todo o estado. Parto do pressuposto que por meio da análise do conjunto documental selecionado é possível compreender a cultura política introjetada no âmbito educacional e como ela contribuiu para a formação do ser adolescente da época

A masculinização pelo ensino: educação escolar para adolescentes no estado Paraná em meio a ditadura (1977-1984)

This work aims to analyze the reverberations of the Law of Guidelines and Bases of Education nº. 5,692, of August 11, 1971 (LDB nº. 5,692/1971) in the activities carried out by the Educational Guidance Service (SOE), at Escola Tiradentes, located in Curitiba, between the years 1977-1984). From LDB nº. 5.692/1971 training for work made technical education compulsory. The “aptitude survey” was the way found to supposedly guide students towards their professional choice, but it also served as a strong reinforcement of gender distinctions historically constructed along with a moral discourse in the training of students. Through intersectionality studies raised by Creshaw (2004) and moral panic studies developed by Giddens and Sitton (2016), I investigate the documents of the aforementioned institution. I believe that together with these observations, the teaching proposal of the time and the reflections in the history of education can be understood.Este trabalho tem como objetivo analisar as reverberações da Lei de Diretrizes e Bases da Educação nº. 5.692, de 11 de agosto de 1971 (LDB nº.&nbsp; 5.692/1971) nas atividades desenvolvidas pelo Serviço de Orientação Educacional (SOE), na Escola Tiradentes, localizada em Curitiba, entre os anos de 1977-1984). A partir da LDB nº.&nbsp; 5.692/1971 a formação para o trabalho tornou o ensino técnico como compulsório. A “sondagem de aptidão” foi a forma encontrada para supostamente orientar os/as estudantes para a escolha profissional, mas também serviu com forte reforço das distinções de gênero construídas historicamente junto de um discurso moral na formação dos/as estudantes. Por meio dos estudos da interseccionalidade levantados por Creshaw (2004) e de pânico moral desenvolvidos por Giddens e Sitton (2016) investigo os documentos da referida instituição. Acredito que junto dessas observações podem serem compreendidas a proposta de ensino da época e os reflexos na história da educação

Adolescentes e projeto de nação: normativas nacionais para o desenvolvimento educacional (1971-1982)

A partir da Lei de Diretrizes e Bases da Educação nº. 5.692, de 11 de agosto de 1971 que, de uma forma geral, instituiu a organização do ensino escolar em fundamental e de segundo grau, com a obrigatoriedade em qualificar para o trabalho, novos documentos foram criados para atender a referida legislação. Selecionado os pareceres: Parecer nº. 853/71; Parecer nº. 45/72; Parecer nº. 339/72 e Parecer n° 346/72, produzidos entre 1971 e 1972, este texto tem como objetivo analisar os referidos documentos com o objetivo de identificar quais as concepções sobre ensino e adolescentes apresentado pelos mesmos