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Enhanced energy harvesting near exceptional points in systems with (pseudo-) PT-symmetry
(Nature, 2021-04)
Exceptional point degeneracies, occurring in non-Hermitian systems, have challenged many well established concepts and led to the development of remarkable technologies. Here, we propose a family of autonomous motors whose ...
Sperm Chemotaxis in Mammals
(Bentham Science Publishers, 2015)
Sperm cells evolved to acquire a sophisticated motility structure called a flagellum which gives spermatozoa a self-propelling force. Nonetheless, in internal fertilizing species such as mammals, the length and complexity ...
Uma proposta de aproximação entre os conceitos de ruas completas e de lazer com aplicação a um segmento viário
(2021-09-08)
Over the years, the growing population motorization led Brazilian cities to configurations that favor motorized transport, leaving aside the importance of pedestrians and cyclists in the development of road networks. In ...
Effect of Added Mass Location on Manual Wheelchair Propulsion Forces
(2020-01-01)
This study investigated the influence of mass distribution on the handrim forces during manual propulsion in four different mobility tasks: Straightforward motion at self-selected speed; straightforward sprint; zero radius ...
Nutrient Transport Driven by Microbial Active Carpets
(AMER PHYSICAL SOC, 2018)
We demonstrate that active carpets of bacteria or self-propelled colloids generate coherent flows towards the substrate, and propose that these currents provide efficient pathways to replenish nutrients that feed back into ...
Operational management of the cane infield wagon: Analysis of the cost of repair and maintenance
(Univ Federal Campina Grande, 2018-03-01)
In the mechanical harvesting of sugarcane, a self-propelled harvester is used in conjunction with an agricultural implement named infield wagon, which has the function of storing and transporting the harvested product. ...
MECHANICAL HARVESTING OF COFFEE IN HIGH SLOPE
(Univ Fed Rural Semi-arido-ufersa, 2016-01-01)
Brazilian coffee farming is carried out both on flat and steep lands. In flat areas, mechanized operations are intensive; however, in steep slope areas, certain mechanized operations cannot be performed, such as harvesting. ...
Spraying systems and traveling speed in the deposit and spectrum of droplets in cotton plant
(2015-01-01)
Tractor traveling speed can influence the quality of spraying depending on the application technology used. This study aimed to evaluate the droplet spectrum, the deposition and uniformity of spray distribution with different ...
GRAPPLE SAW’S OPERATING CONDITIONS INFLUENCE ON THE PRODUCTIVITY AND COST OF PROCESSING FELLED TREESInfluência das condições operacionais da grapple saw na produtividade e custos do processamento de árvores derrubadas
(2022-01-01)
In the full-tree system, one of the self-propelled forest machines used is the grapple saw, which uses mechanical force to delimbing and crosscutting stems, commonly in processing yards or on the sides of forest roads. ...
Use of organic waste biomass for the design of an electric station
(2018)
The Colombian country side is moving forward, among some obstacles is the little
use of self-propelled assets in farm activities, the current ones, due to their technical
characteristics, don’t adapt to Colombian’s ...