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Moreira A.R.,Centro Universitario Of Patos Of Minas Unipam | Fagan E.B.,UNIPAM | Martins K.V.,UNIPAM | de Souza C.H.E.,UNIPAM
Bioscience Journal | Year: 2010

The objective of this study was to evaluate the effect of the application of silicon in the soybean crop. An experiment was carried out in a red latosol soil from December 2007 to April 2008. The estatistical design of the experiment was complete randomized blocks with four treatments (T 1, untreated plot; T 2, a silicon foliar application; T 3, two silicon foliar applications, and T 4, three silicon foliar applications) with three replicates. Each application was 500 ml per hectare of "Silício Samaritá". The first silicon application was carried out in the stage V8 (46 days after the sowing), the second in R 1 (60 days after the sowing) and the third in R 5.1 (88 days after the sowing). Only the third application of the silicon affected the cumulative dry mass of the plants, except for root dry mass. The plants that received three silicon applications presented thicker leaves with the decrease of the specific leaf area (16%, 17.5% and 9.9%) in relation to T 1, T 2 and T 3, respectively. The conclusion is that only as of the third application (T 4) the silicon accumulated in adequate levels for the plant and promoted an increase in the accumulatioon of dry weight and productivity, which was over 20, 18 and 20 bags per hectare in relation to treatments T 1, T 2 and T 3, respectively. Source

The paper purpose was to examine the technology inclusion of the milk agro-industrial chain in the city of Patos de Minas, in Minas Gerais. It was a descriptive and quantitative research using three business segments. The research involved thirty farmers, two producers associations and two milk processing industries, totaling 34 interviews. The results showed that, in the investigated period, the sector suffered significant structural changes regarding technological diffusion, innovation and logistics, resulting in, among others, a decrease in the number of rural enterprises, improving infrastructure and increasing environmental certifications. Therefore, it can be seen that the environment has changed and that the incorporation of technological innovations by the surveyed sectors, as well as upgrading of the infrastructure have focused on improving the production and processing of milk. Source

Moraes H.B.,Centro Universitario Of Patos Of Minas Unipam | Guardieiro P.R.,Federal University of Uberlandia
Proceedings of the 14th IEEE International Conference on High Performance Computing and Communications, HPCC-2012 - 9th IEEE International Conference on Embedded Software and Systems, ICESS-2012 | Year: 2012

Achieving quality of service (QoS) in IEEE 802.16 networks depends, among other factors, on mechanisms for traffic policing at the base station (BS) and subscriber stations (SSs). Since IEEE 802.16 does not include a mandatory policing, this paper proposes a policing mechanism for the SS in the uplink traffic which uses the leaky bucket mechanism (token bucket). The performance evaluation studies based on modeling and simulation have shown that the proposed mechanism is able to ensure satisfactory levels of QoS to applications, meeting their average limited delay requirements, minimum sustainable throughput and limited packet drop rate. © 2012 IEEE. Source

Fagan E.B.,Centro Universitario Of Patos Of Minas Unipam | de Souza C.H.E.,Centro Universitario Of Patos Of Minas Unipam | Pereira N.M.B.,Centro Universitario Of Patos Of Minas Unipam | Machado V.J.,Federal University of Uberlandia
Bioscience Journal | Year: 2011

Coffee (Coffea sp) is one of the most traditional crops of Brazilian agriculture and its cup quality has been the subject of several studies. The cup quality depends on the pre-processing operations, such as type of crop, stage of maturation of the grain, preparation and drying of coffee. In the coffee tree, the quality of grain depends on the amount of photoassimilates available, mainly in the growth phase or grain filling. Factors such as grain growth, the growth rate of culture, time of growth and grain storage capacity may be limiting the production of culture and the cup quality. The taste and aroma of coffee are complex parameters that are part of the cup quality. These parameters in turn depend on the chemical composition of grain. The accumulation of fotossintatos during the growth of fruit also becomes an important factor in the cup quality, because when the period of grain growth is reduced, a smaller accumulation of fotossintatos and thus a lower quality of drink. Source

Reis J.M.R.,Centro Universitario Of Patos Of Minas Unipam | Chalfun N.N.J.,Federal University of Lavras | De Almeida Reis M.,Federal University of Uberlandia
Pesquisa Agropecuaria Tropical | Year: 2010

Seedling quality is essential for producing quality fruits and keeping the producer revenue. The main goal of this research was to investigate the effect of different environmental conditions and three grafting methods in the production of peach-tree seedlings (Prunus pérsica (L.) Batsch). The experiment took place at the Universidade Federal de Lavras, Minas Gerais State, Brazil. The experimental design was completely randomized, in a 3×3 factorial scheme (three environments: plastic greenhouse, mesh of 50% of shading, and open field; and three grafting methods: shield budding, patch budding, and cleft grafting), with four replications and 12 plants per plot. 'Okinawa' was the rootstocks used, and buddings and grafts originated from the 'Diamante' peach-tree cultivar. The features evaluated were graft- take (%) and time to reach the first formation pruning (days). It was concluded that the mean average graft-take percentage for all three grafting methods was 91.94%, independently of the environment. For all three environmental conditions studied, seedlings grafted according to the cleft grafting method were the fastest ones to reach the first formation pruning, while the patch budding method allowed less time for the first formation pruning, for the open field and mesh environments, when compared with the shield budding method. Source

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