Development and implementation of a low-cost LBL navigation system for an AUV

A reliable navigation system is a key factor for the success of an operational mission with an AUV in a real scenario. In this paper, we address the main issues involved in the implementation of a long baseline (LBL) navigation system for a REMUS AUV. This system replaces both the original hardware and software of the vehicle with a simpler, faster, less expensive and more precise system, based on a Kalman filter. We also discuss the influence of transponder location in the overall performance of the LBL navigation, and present results obtained with this new system in operational missions

Cultivo do milho: plantio, espaçamento, densidade, quantidade de sementes.

bitstream/CNPMS/15602/1/Com_46.pd

Cultivares.

4. ed

Milho: como escolher a cultivar certa entre tantas alternativas.

bitstream/item/61040/1/Milho-escolher.pd

Role of physical activity, physical fitness, and chronic health conditions on the physical independence of community-dwelling older adults over a 5-year period

The variability in the individual characteristics and habits could help determine how older adults maintain independence. The impact of the variability in physical activity, physical fitness, body composition, and chronic health conditions (co-morbidities) on the independence of older adults, especially over time, is seldom examined. This study aims to analyze quantitatively the impact of baseline values and changes in physical activity, physical fitness, body composition, and co-morbidities on the physical independence of community-dwelling, older adults over a 5-year period. Data from 106 and 85 community-dwelling adults (!60 years) were collected at baseline and after five years, respectively. Linear regression selected the main predictors of changes in physical independence as follows: the baseline physical independence (b = 0.032, R2 = 9.9%) and co-morbidities (b = 0.191, R2 = 6.3%) and the changes in co-morbidities (b= 0.244, R2=10.8%), agility (b= 0.288, R2=6.7%), aerobic endurance (b = 0.007, R2 = 3.2%), and walking expenditure (b = 0.001, R2 = 5.1%) (p < 0.05). In conclusion, baseline physical independence, baseline co-morbidities, and changes in co-morbidities, walking, agility, and aerobic endurance predicted physical independence over five years regardless of age and gender. Gains of up to 8.3% in physical independence were associated with improvements in these variables, which corresponds to regaining independence for performing one or two activities of daily living

Produção orgânica de milho intercalado com leucena.

O trabalho vem mostrando eficiência do uso da leucena como um bom adubo verde para o milho em sistemas orgânicos de produção. O trabalho deverá ter continuidade por mais três safras para consolidar a tecnologia