Different Vehicles
Mostrando 13-24 de 163 artigos, teses e dissertações.
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13. Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic Composites
ABSTRACT: Zirconium diboride is an ultra high temperature ceramic material that leads this emerging class of materials because of its distinct combination of properties, including high melting temperature (> 3000 °C) and the lowest theoretical density (6.09 g·cm-3) among the borides. This combination of properties makes ZrB2 candidate for airframe leading
J. Aerosp. Technol. Manag.. Publicado em: 03/06/2019
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14. Implementation of a Flexible Manufacturing System in a production cell of the automotive industry: decision and choice
Abstract Paper aims The purpose is to decide on the technology for the implementation of an FMS in a manufacturing cell that produces the coil for starting engines in a company of the Brazilian automotive industry. Originality The mixed use of structured methods to support a semi-structured decision-making problem. Research method The qualitative-quantita
Prod.. Publicado em: 30/05/2019
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15. Comparison between calcium hydroxide mixtures and mineral trioxide aggregate in primary teeth pulpotomy: a randomized controlled trial
Abstract Objectives: To evaluate the effect of calcium hydroxide (CH) associated with two different vehicles as a capping material for pulp tissue in primary molars, compared with mineral trioxide aggregate (MTA). Methodology: Forty-five primary mandibular molars with dental caries were treated by conventional pulpotomy using one of the following materials
J. Appl. Oral Sci.. Publicado em: 20/05/2019
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16. Effect of Log Length on Forestry Loading and Unloading
ABSTRACT This study aimed to technically evaluate loading and unloading with different wood lengths . Data used were obtained from log harvesting areas of a forestry company in southern Brazil, on operations with loblolly pine logs. The study addressed the analysis of time and motion, being divided into loading, unloading, mooring and unmooring. Four treatm
Floresta Ambient.. Publicado em: 04/04/2019
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17. Wheel-surface model parameters estimation: sand humidity influence on traction effort of all-terrain unmanned vehicle
Abstract The aim of the paper is to present the experimental results for material model of the sand, case of wet and dry probe. Since traction and side forces derivation methodology and tire-round interaction models for on-road vehicles are widely described, there is a lack of methods for off-road vehicles. The methodology, presented in this work, includes t
Lat. Am. j. solids struct.. Publicado em: 18/02/2019
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18. Operational Analysis of Forestry Transportation Using Self-loading Trucks in a Mountainous Region
ABSTRACT This research was conducted in wood harvesting and transportation areas in the mountainous region of Espírito Santo, Brazil, aiming to analyze the road transportation of forestry wood operations with self-loading trucks. The study identified and evaluated the times, average speed, mechanical availability, level of use and operating efficiency of t
Floresta Ambient.. Publicado em: 11/10/2018
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19. Critical control points and food pathogen presence in dairy plants from Turkey
Abtract In the present study, total aerobic mesophilic bacteria count, Staphylococcus aureus and Escherichia coli 0:157 H:7 bacteria count, and presence of bacteria from Listeria and Salmonella genera were determined in the samples collected during separate 5-month-long periods from 15 separate points at five different dairy plants operating in different re
Food Sci. Technol. Publicado em: 30/07/2018
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20. Topographic modelling using UAVs compared with traditional survey methods in mining
Abstract The current developments with unmanned aerial vehicles (‘UAVs’) are revolutionizing many fields in civil applications, such as agriculture, environmental and visual inspections. The mining industry can also benefit from UAVs in many aspects, and the reconciliation through topographic control is an example. In comparison with traditional topograp
REM, Int. Eng. J.. Publicado em: 2018-07
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21. Crashworthiness Optimization of Nested and Concentric Circular Tubes Using Response Surface Methodology and Genetic Algorithm
Abstract In this study crashworthiness optimization of nested and concentric circular tubes under impact loading is performed by coupling Finite Element model, Response Surface Models and Genetic Algorithm. Specific Energy Absorption (SEA) and Crash Force Efficiency (CFE) are used in crashworthiness optimization since these criteria are important indicators
Lat. Am. j. solids struct.. Publicado em: 14/06/2018
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22. Influence of different cosmetic vehicles in mechanical and physical properties of hair treated with oxidative hair dyes
ABSTRACT Hair care products play a significant role in the cosmetic market and aim at improving hair brightness, breakage resistance, and color change. In this study, we analyzed the possibility of the formulation of oxidative dyes in different vehicles impacting the hair’s both mechanical and physical properties. Light brown and light blond dyes were prep
Braz. J. Pharm. Sci.. Publicado em: 07/06/2018
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23. Space Propulsion: a Survey Study About Current and Future Technologies
ABSTRACT: Current Space Launch Vehicles use chemical reactions (solid and liquid propellants) to achieve sufficient thrust to launch artifacts and humans into space. Propulsion technologies can be framed in three different categories: "escape propulsion", "in-space propulsion", and "deep space propulsion". The launch vehicles currently used for "escape propu
J. Aerosp. Technol. Manag.. Publicado em: 26/02/2018
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24. Status and Trends of Smallsats and Their Launch Vehicles — An Up-to-date Review
ABSTRACT This paper presents an analysis of the scenario of small satellites and its correspondent launch vehicles. The miniaturization of electronics, together with reliability and performance increase as well as reduction of cost, have allowed the use of commercials-off-the-shelf in the space industry, fostering the Smallsat use. An analysis of the launche
J. Aerosp. Technol. Manag.. Publicado em: 2017-09