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Mostrando 1-12 de 154 artigos, teses e dissertações.
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1. Torsional fatigue strength of reciprocating and rotary pathfinding instruments manufactured from different NiTi alloys
Abstract To evaluate the torsional properties of engine-driven pathfinding instruments manufactured from different NiTi alloys – R-Pilot (tip size 12.5;.04 taper; M-Wire) and One G (tip size 14;.03 taper; Conventional NiTi). A total of 40 NiTi instruments from engine-driven pathfinding instruments (n = 20) were used. The torsion tests followed ISO 3630-1 (
Braz. oral res.. Publicado em: 28/10/2019
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2. Knapsack sprayers: effort required for pumping lever operation
RESUMO: Existem diversos equipamentos utilizados na aplicação de agrotóxicos em propriedades familiares, principalmente os pulverizadores costais manuais. Estes ganham destaque pela sua versatilidade de uso e, principalmente, o baixo custo para o produtor rural. Na bibliografia foi constatado poucos estudos relacionados ao operador, quando analisado o se
Cienc. Rural. Publicado em: 05/09/2019
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3. Interferômetro de Michelson construído com material de fácil acesso
Resumo Este trabalho apresenta uma possibilidade de montar um interferômetro similar ao empregado no famoso experimento de Michelson e Morley utilizando materiais de fácil acesso e a um custo muito inferior que os experimentos didáticos disponíveis no mercado. Neste artigo, o principal desafio é o de mover um dos espelhos por poucos milímetros, o que �
Rev. Bras. Ensino Fís.. Publicado em: 13/06/2019
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4. Behavioral, affective, and cognitive alterations induced by individual and combined environmental stressors in rats
Objective: To evaluate whether exposing rats to individual or combined environmental stressors triggers endophenotypes related to mood and anxiety disorders, and whether this effect depends on the nature of the behavior (i.e., innate or learned). Methods: We conducted a three-phase experimental protocol. In phase I (baseline), animals subjected to mixed sc
Braz. J. Psychiatry. Publicado em: 14/03/2019
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5. Back to the future: a case series of minimally invasive repair of pectus excavatum with regular instruments
RESUMO Objetivo: O minimally invasive repair of pectus excavatum (MIRPE, reparo minimamente invasivo do pectus excavatum) é um tratamento cirúrgico do PE. Durante o procedimento, utiliza-se um introdutor específico a fim de criar um túnel mediastinal para a colocação toracoscópica de uma barra metálica. Já houve casos relatados de perfuração card
J. bras. pneumol.. Publicado em: 11/02/2019
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6. Validade de uma escala de resiliência (RESI-M) em mulheres indígenas do México
Resumo: A resiliência inclui uma série de capacidades e habilidades, as quais são adquiridas como resultado da interação do individuo com seu contexto, conseguindo superar seus próprios limites de resistência, através da geração de mecanismos, processo de defesa e proteção mais eficientes do que antes, diante da exposição a eventos adversos. A
Cad. Saúde Pública. Publicado em: 11/10/2018
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7. OPERATOR EFFORT ON THE OPERATION OF THE KNAPSACK SPRAYER PUMPING LEVER
ABSTRACT Several equipments are used in the application of agrochemicals by small scale farmers, with emphasis on the knapsack hand sprayer due to the low cost of acquisition and viability of use in different operating conditions. Although it is an equipment widely used, few studies have been developed in order to ascertain its functional characteristics. Th
Eng. Agríc.. Publicado em: 2018-04
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8. Confrontando el discurso dominante: las remesas bajo el prisma de la Experiencia Mexicana
Abstract The dominant discourse on remittances as a lever of development for migrant’s countries of origin has arisen with renewed impetus in the international agenda, particularly within the framework of the Global Compact for Safe, Orderly and Regular Migration propelled by the UN. Based on hard data from the Mexican experience, our propose is to contrib
REMHU, Rev. Interdiscip. Mobil. Hum.. Publicado em: 2018-04
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9. Morphology and Phase Formation During the Solidification of Al-Cu-Si and Al-Ag-Cu Ternary Eutectic Systems
The microstructure of ternary alloys in the Al rich corner of the Al-Cu-Si and Al-Ag-Cu systems were analyzed in order to determine the solidification path in the different structural regions expected from the equilibrium phase diagram. The analysis was based on theoretical models developed in the literature for solidification of ternary eutectic system allo
Mat. Res.. Publicado em: 26/02/2018
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10. Effect of cantilever length and alloy framework on the stress distribution in peri-implant area of cantilevered implant-supported fixed partial dentures
ABSTRACT Because many mechanical variables are present in the oral cavity, the proper load transfer between the prosthesis and the bone is important for treatment planning and for the longevity of the implant-supported fixed partial denture. Objectives To verify the stress generated on the peri-implant area of cantilevered implant-supported fixed partial d
J. Appl. Oral Sci.. Publicado em: 2016-04
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11. A study of burrow morphology in representative axiidean and gebiidean mud shrimps, from the Persian Gulf and Gulf of Oman, Iran
Mud shrimps (formerly Thalassinidea) are common burrow dwelling decapod crustaceans in the littoral zone of the Persian Gulf and Gulf of Oman. Their burrow morphology was investigated using foam casting methods. The present study shows that the burrow morphology in Upogebia carinicauda is not consistent and the recorded variations are based on habitat type a
Nauplius. Publicado em: 2014-12
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12. Temporal control in chained fixed-ratio, fixed-interval schedules
Four rats were subjected to chained fixed-ratio (FR), fixed-interval (FI) schedules of reinforcement (chain FR 5 FI). A FR schedule at one lever produced a discriminative stimulus (i.e., light) associated with an FI schedule of primary reinforcement (water) at the second response lever. The FR schedule was kept constant, whereas the FI length was changed fro
Psychol. Neurosci.. Publicado em: 2013-06