694 research outputs found
Desfecho obstétrico na indução de trabalho de parto em gestações prolongadas no hospital universitário da Universidade Federal de Santa Catarina
Trabalho de Conclusão de Curso - Universidade Federal de Santa Catarina. Curso de Medicina. Departamento de Tocoginecologia
Use of Expanded Shales, Clays and Slates-Light Weight Aggregate for Erosion Control and Grass Establishment on Un-vegetated Embankments
High salinity concentrations in soils used to renovation and construct levees adversely affect levee’s performance due to increased susceptibility for erosion problems. Dispersion of the soil particles caused by salts and seal formation affect levee structure stabilization and vegetation establishment is impaired due to lower water infiltration capacity in levees; and high osmotic pressure exerted by salts reducing water availability for seed germination leaving levee surface prone to severe rilling and soil loss from runoff erosion. The objectives of this research were determine if expanded shales, clays, and slates-light weight aggregate (ESCS-LWA) over clay reduces erosion and evaluate how ESCS-LWA affects vegetation establishment from seed. Alternatives to soft armoring erosion protection such as concrete t-walls, concrete covering or rock applications are expensive and could limit levee expansion. The use of mulches such as ESCS-LWA can significantly reduce soil erosion and pollutant transfer as a transition to vegetation establishment. Aggregate particle reduce evaporation at the soil surface during wet periods by disrupting the soil-atmosphere continuum. The ability of ESCS-LWA to reduce erosion and increase water availability should allow for increased seed germination and plant growth. To test this hypothesis, four ESCS-LWA treatments (0, 50, 100, 150% ground coverage) were applied to bare soil and seeded with 75 kg PLS bermudagrass ha-1. Treatments were subjected to a rainfall simulation at 75 mm hr-1 at 30% slope for a 30-min runoff period in a greenhouse. Prior to simulation soil moisture was recorded with runoff volume and total solids (TS) collected during simulation. The ESCS-LWA increased the time until the onset of runoff and reduced TS losses \u3e90% compared to bare soil. Increasing ESCS-LWA coverage resulted in higher soil moisture for 30 days post-rainfall simulation with 50% and 100% ground cover resulting in the highest bermudagrass coverage and biomass
Integration of Remote Sensing Approaches for In-Season Nitrogen Management
Nitrogen (N) management is being conducted at flat rate in Louisiana due to practicality and convenience, but the price of N fertilizer and high breakeven costs are forcing producers to find ways to reduce costs and optimize N application. In this scenario, precision agriculture technologies, specifically the use of optical sensors on board of unmanned aerial systems (UAS) to variable rate N application on farm is showing a promising approach to save inputs and reduce environmental impacts. However, the general goal of this research was to develop and evaluate in-season N management approaches for N recommendation in corn (Zea mays L.) fields using plant canopy sensors and UAS. The specific objectives were to: 1) investigate the differences in spectral reflectance bands and vegetation indices for sensing the N status of corn, through different hours of the day, under different weather conditions and sun irradiation angulation; and 2) evaluate an in-season N fertilizer recommendation algorithm based on an approach that reflects local conditions and needs for N fertilization using active crop canopy sensor and unmanned aircraft systems coupled with multispectral camera, and to validate and compare the algorithm proposed with other approaches. The experiments were conducted in three fields at the LSU Doyle Chambers Central Research Station located at Ben Hur Road, Baton Rouge, LA, 30.365°N, -91.166°W, with continuous corn during the growing seasons from 2018 to 2021. To investigate time of the day effects on active and passive sensor systems the experiment was conducted at the same location in corn during a day with percentages of cloudy coverage conditions varying from 80 to 100 %, with very few moments of cloud dispersion resulting in 100% of clear sky at the target area. The conclusion in this experiment addressing objective 1 is that the data obtained from passive sensors (commercial UAS camera and spectroradiometer), contrarily to the active crop canopy sensor, presented prominent significant variations in measurements at different times of the day, especially observed when ambient conditions changed solar radiation. This indicates higher sensitivity to changes during the day for the wavebands and vegetation indices derived using these sensors. For objective 2, the main conclusions are: (i) a practical and easy to implement algorithm approach was proposed and validated considering local conditions and implemented in-season, (ii) the use of the Chlorophyl Red Edge Vegetation Index (CIRE) obtained from the crop canopy reflectance with the approaches developed from local data to manage N status, can address spatial variability presented in fields through the different responses obtained for N fertilization across the sites analyzed, and (iii) the virtual approaches using both active and passive sensors, indicated relatively better performances based on yield and partial factor productivity (PFP) responses. Due to the easy implementation this finding suggests that this approach has great potential to be applied for N recommendations regardless of the type of sensor used to collect data
As expressões da "questão social" na formação social brasileira da década de 1950 até o fim da ditadura civil-militar
Trabalho de Conclusão de Curso (graduação)—Universidade de Brasília, Instituto de Ciências Humanas, Departamento de Serviço Social, 2018.Este trabalho teve por objetivo analisar as expressões da “questão social” na formação
social Brasileira da década de 1950 até o fim da ditadura civil-militar. Com a finalidade
de refletir sobre os impactos dos processos de transformação capitalista na organização e
na estruturação da burguesia brasileira, assim como nas suas consequências e reflexos
sobre a vida e as lutas sociais da classe trabalhadora no contexto deste período. Desta
forma baseando-se no método materialista-histórico-dialético e tendo-se como
procedimento metodológico a análise teórico-bibliográfica, a análise engloba as
decorrências das investidas imperialista na década de 1950 no Brasil, as correlações de
forças que envolveram o processo de irrupção e consolidação do capitalismo monopolista
e a configuração das lutas sociais no seu processo de avanço até fim da ditadura civilmilitar. O estudo realizado nos permitiu apreender que a consolidação do capitalismo
monopolista no contexto brasileiro, se configurou num processo em que as requisições
imperialistas em função da acumulação extraordinária, movimentaram a construção de
uma autocracia burguesa que direcionada à superexploração do trabalho, à repressão
política e ao autoritarismo, com base no resgate das piores tradições que perpassam a
Formação Social Brasileira. A “questão social” nesse sentido se expressa num quadro de
supressão das lutas sociais, das organizações e da vida política da classe trabalhadora.This study aimed to analyze the expressions of the "social question" in the Brazilian social
formation of the 1950s until the end of the civil-military dictatorship. With the purpose
of reflecting on the impacts of the processes of capitalist transformation on the
organization and structure of the Brazilian bourgeoisie, as well as its consequences and
reflexes on the life and social struggles of the working class in the context of this period.
In this way, based on the materialist-historical-dialectical method and having as a
methodological procedure the theoretical-bibliographic analysis. The analysis
encompasses the consequences of the imperialist onslaughts in the 1950s in Brazil, the
correlations of forces that involved the process of capitalist irruption and consolidation,
and the configuration of social struggles in their process of advancement to the civilmilitary. The study allowed us to understand that the consolidation of monopoly
capitalism in the Brazilian context was a process in which imperialist requisitions due to
extraordinary accumulation, moved the construction of a bourgeois autocracy in the form
of the technocratic state the political repression of movements, authoritarianism and the
rescue of the worst traditions that permeate the Brazilian Social Formation. The “social
question” Aiming expressions at suppressing the social struggles, of organizations and
the political life of the working class
Aplicação de água residuária de suínos no sistema silvipastoril
Brazil is the fourth largest pork producer in the world, with a growing international insertion, earning more than US 1 bilhão por ano, chegando a 3% da produção e 11% das exportações mundiais. Com o aumento da produção de suínos, temos também um incremento na produção de água residuárias de suinocultura (ARS), que quando mal manejada, está pode conter alto potencial de poluição ambiental. O objetivo do trabalho foi avaliar a influência da aplicação de diferentes doses de água residuária de suinocultura consorciada com citriodora, nas propriedades químicas do solo, nas concentrações de macro e micronutrientes em uma área implantada com sistema silvipastoril. O trabalho foi realizado na Fazenda Bonsucesso, na rodovia Campo Florido Km 20, localizada no município de Uberlândia-MG. O plantio das mudas de Corymbia citriodora foi realizado com arranjo em linhas duplas, com espaçamento de 2 metros entre plantas e 3 metros entre linhas e 15 metros entre as linhas duplas. As parcelas experimentais foram de 10 metros de comprimento, contendo 5 plantas em cada linha simples, totalizando 10 plantas na parcela, por 6 metros de largura, com uma área de 60 m2, onde foram aplicados os tratamentos. Os tratamentos utilizados foram cinco doses de ARS (0; 200; 400; 600 e 800 m³ ha-1) com cinco repetições. As aplicações das doses de ARS foram parceladas nos meses junho, julho e agosto de 2015. Foram avaliadas as características químicas do solo, nas camadas de 0-20, 20-40 e 40-60 cm de profundidade. Foi utilizado o delineamento em blocos casualizados em arranjo de parcelas subdivididas, sendo as doses de ARS as parcelas e a profundidade a subparcela. Foi feita análise de variância com teste regressão e Tukey utilizando o programa estatístico Sisvar (FERREIRA, 2010). A aplicação de água residuária de suínos em profundidade promove aumento no teor de Cu na dose de 400 e 800 m3 ha-1 ano -1. Na profundidade de 0-20 houve maior concentração de micronutrientes. Água residuária de suínos não influenciou no aumento de macronutrientes no terceiro ano de aplicação. Houve um aumento nos teores de K, Mg e Ca que tendem a crescer nos próximos anos, em relação ao início do experimento
SOCIEDADE DE CONSUMO E PRODUÇÃO INDUSTRIAL EM MASSA: INFLUÊNCIAS NA SUSTENTABILIDADE AMBIENTAL.
As várias mudanças ocasionadas pela Revolução Industrial e intensificadas pela globalização trouxeram o consumo não apenas como meio para acesso a uma diversidade crescente de produtos, mas também, especialmente, como hábito estimulado para satisfazer desejos e necessidades supérfluas, quase como um dever de cidadania. O crescente e descontrolado ritmo de produção, para o abastecimento deste mercado, aliado ao consumo irracional promoveu a degradação do meio ambiente em níveis exorbitantes. Considerando que o meio ambiente sadio e ecologicamente equilibrado é um direito fundamental ainda a ser concretizado, deve-se buscar uma adequação mais racional para controle das conseqüências negativas à sustentabilidade ambiental, através da construção de um senso de educação com o meio ambiente, como forma para se alcançar um modelo sustentável de desenvolvimento, formando consumidores conscientes e responsáveis pelo seu papel na sociedade
A Framework for Learning by Demonstration in Multi-teacher Multi-robot Scenarios
As robots become more accessible to humans, more intuitive and human-friendly ways of
programming them with interactive and group-aware behaviours are needed.
This thesis addresses the gap between Learning by Demonstration and Multi-robot
systems. In particular, this thesis tackles the fundamental problem of learning multi-robot
cooperative behaviour from concurrent multi-teacher demonstrations, problem which had
not been addressed prior to this work.
The core contribution of this thesis is the design and implementation of a novel, multi-
layered framework for multi-robot learning from simultaneous demonstrations, capable
of deriving control policies at two different levels of abstraction. The lower level learns
models of joint-actions at trajectory level, adapting such models to new scenarios via
feature mapping. The higher level extracts the structure of cooperative tasks at symbolic
level, generating a sequence of robot actions composing multi-robot plans. To the best of
the author's knowledge, the proposed framework is the first Learning by Demonstration
system to enable multiple human demonstrators to simultaneously teach group behaviour
to multiple robots learners.
A series of experimental tests were conducted using real robots in a real human workspace
environment. The results obtained from a comprehensive comparison confirm the appli-
cability of the joint-action model adaptation method utilised. What is more, the results
of several trials provide evidence that the proposed framework effectively extracts rea-
sonable multi-robot plans from demonstrations. In addition, a case study of the impact
of human communication when using the proposed framework was conducted, suggesting
no evidence that communication affects the time to completion of a task, but may have
a positive effect on the extraction multi-robot plans. Furthermore, a multifaceted user
study was conducted to analyse the aspects of user workload and focus of attention, as
well as to evaluate the usability of the teleoperation system, highlighting which parts were
necessary to be improved
Description of the first juvenile stage of the fiddler crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae)
The first stage of the fiddler crab Minuca mordax is described here. Zoea larvae obtained from four ovigerous female were reared in the laboratory until the development of the first crab stage. The development from zoea I to the first juvenile instar lasted 35 days after hatching. The first crab stage of Minuca mordax can be morphologically distinguished from those of Minuca burgersi and Leptuca cumulanta by a 2‑segmented antennule endopod (3‑segmented in M. burgersi, unsegmented in L. cumulanta), an unsegmented maxillule endopod (2‑segmented in M. burgersi and L. cumulanta), and a 4‑segmented first and second maxilliped endopod (respectively unsegmented and 5‑segmented in M. burgersi and L. cumulanta). The three species have the following characters in common: segmented peduncle of antennule 2; endopod of antennule unsegmented; presence of aesthetascs on the antennule; peduncle of antenna 3‑segmented; flagellum of antenna 6‑segmented; mandible 3‑segmented; maxilla with coxal and basal endite bilobed; first, second and third maxillae with exopod 2‑segmented and abdomen with six somites that are wider than long
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