Spelling suggestions: "subject:"este""
21 |
Respostas agron?micas e nutricionais do capim-massai submetido a doses e fontes de ureia comum e de efici?ncia aumentada / Agricultural and nutritional answers of the massai-grass subjected to doses and common and increased efficiency urea sourcesSILVA, Aline Barros da 19 August 2016 (has links)
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2017-08-23T19:01:51Z
No. of bitstreams: 1
2016 - Aline Barros da Silva.pdf: 2200971 bytes, checksum: c03b52ff6176469c08ca932517eebdbe (MD5) / Made available in DSpace on 2017-08-23T19:01:51Z (GMT). No. of bitstreams: 1
2016 - Aline Barros da Silva.pdf: 2200971 bytes, checksum: c03b52ff6176469c08ca932517eebdbe (MD5)
Previous issue date: 2016-08-19 / CAPES / The search for the best efficiency in the nitrogen fertilization justifies the need in the evaluation in nitrogen (N) sources and doses what promote lower losses in the ambient, beyond higher productivity and quality of the forage produced. In that contest, this study aimed to evaluation the morphological composition, structural characteristics and nutritional value of the Panicum maximum cv. Massai forage, cultivated under urea sources (common and coated Policote?) and N doses (200, 400 e 600 kg ha-1 year-1), during autumn, winter and spring 2014, summer and autumn 2015 seasons. The experiment was conducted in UFRRJ, Serop?dica/RJ, under a complete block randomized design with four replications in a factorial arrangement (3x2) + 1. The variance analysis of data was performed using the PROC MIXED of the SAS? (9.2 version), a 5% probability. The means of treatments were compared using PDIFF (p<0.05), and the quantitative effects using a PROC REG of SAS? (probability<0.05). There was interaction (p<0.05) between doses, sources of urea, and seasons for the forage mass (FM), percentages of leaf blades (LBDMP), stem (SDMP) and dead material (DMDMP) dry matter, leaves blades: steams ratio (LBSR), forage accumulation rate (FAR), nitrogen use efficiency (NUE), and for dry matter (DM) and crude protein (CP) content of the forage. Since the canopy height (CH), tiller population density (TPD), weight per tiller (WT) and forage bulk density (FBD), mineral matter (MM) and insoluble neutral detergent fiber (NDF) contents of the forage varied (p<0.05) due to N rates and seasons interaction. There was a linear increased in the FM with increasing of N doses until to the 600 kg ha-1 yr-1 level in the winter and spring seasons by both urea sources. The increasing N doses promoted higher LBDMP and lower SDMP and DMDMP of the FM, besides providing increased TPD, FBD and FAR of the massai grass forage, during all seasons studied. There was a quadratic positive effect for NUE during autumn 1, spring, summer and autumn 2 for common and coated urea, with higher maximum points for coated urea. And during the winter there was a positive linear effect only for coated urea. Higher average values of the CP were verified on the spring (11.76%), and lower on the autumn/winter (9.15%), and the use of coated urea providing higher CP levels of the forage than common urea in all seasons (10.40% and 9.41% general average, respectively). The CP content increased linearly with the increase of N levels in all seasons, while the NDF reduced linearly with increasing of these levels, except for the fall season 2 (there was not effect for N dose - p>0.05). Intensification of nitrogen fertilization favors the leaf blades participation in the forage mass, benefiting the structural characteristics, the forage accumulation, and the nutritional value of Massai grass. Coated urea promotes greater NUE during all seasons of the year. / A busca pela melhor efici?ncia da aduba??o nitrogenada justifica a necessidade da avalia??o de fontes e doses de nitrog?nio (N) que promovam menores perdas para o ambiente, al?m de maior produtividade e qualidade da forragem produzida. Nesse contexto, objetivou-se avaliar a composi??o morfol?gica, as caracter?sticas estruturais e o valor nutricional da forragem do Panicum maximum cv. Massai, cultivado sob fontes de ureia (comum e revestida por Policote?) e doses de N (200, 400 e 600 kg ha-1 ano-1), durante as esta??es de outono, inverno e primavera de 2014, ver?o e outono de 2015. O Experimento foi conduzido na UFRRJ, Serop?dica/RJ, sob delineamento de blocos completos casualizados em arranjo fatorial (3x2) + 1, com quatro repeti??es. Para an?lise de vari?ncia dos dados utilizou-se o PROC MIXED do SAS? (vers?o 9.2), a 5% de probabilidade. As m?dias dos tratamentos foram comparadas pela PDIFF (p<0,05), e os efeitos quantitativos pelo PROC REG do SAS? (p<0,05). Houve intera??o (p<0,05) entre doses, fontes de ureia, e esta??es do ano para massa de forragem (MF), porcentagens de massas secas de l?minas foliares (PMSLF), de colmos (PMSC), e de material morto (PMSMM), rela??o l?mina foliar: colmo (RLFC), taxa de ac?mulo de forragem (TAF), efici?ncia da utiliza??o do nitrog?nio (EUN), e para os teores de mat?ria seca (MS) e prote?na bruta (PB) da forragem. J? a altura (ALT) dos doss?is, densidade populacional de perfilhos (DPP), peso por perfilho (PP) e densidade volum?trica da forragem (DVF), bem como os teores de mat?ria mineral (MM) e de fibra em detergente neutro (FDN) da forragem variaram (p<0,05) com a intera??o entre dose de N e esta??o do ano. A MF aumentou linearmente com a aduba??o nitrogenada at? a dose de 600 kg ha-1 ano-1 de N nas esta??es de inverno e primavera para ambas as fontes de ureia. Maiores doses de N promoveram maiores PMSLF e menores PMSC e PMSMM na MF, al?m de proporcionar maiores DPP, DVF e TAF do capim-massai, durante as esta??es estudadas. Houve efeito quadr?tico positivo para EUN durante o outono 1, primavera, ver?o e outono 2 para ureia comum e revestida, com maiores pontos de m?ximo para ureia revestida, e durante o inverno houve efeito linear positivo somente para ureia revestida. Maior valor m?dio de PB foi verificado na primavera (11,76%), e menor no outono/inverno (9,15%), e o uso da ureia revestida promoveu maiores teores de PB na forragem que a ureia comum em todas as esta??es (m?dias gerais de 10,40% e de 9,41%, respectivamente). O teor PB aumentou linearmente com o incremento de doses de N em todas as esta??es, enquanto que os teores de FDN reduziram linearmente com aumento dessas doses, exceto para a esta??o outono 2 (n?o houve efeito de dose de N ? p>0,05). A intensifica??o da aduba??o nitrogenada favorece a participa??o de l?minas foliares na massa de forragem, beneficia as caracter?sticas estruturais, o ac?mulo de forragem, e o valor nutricional do capim-massai. O uso de ureia revestida promove maior EUN durante todas as esta??es do ano.
|
22 |
Caracteriza??o de ?gua de lavagem de filtros em esta??es de tratamento de ?gua de filtra??o diretaCampos, Hilderica Lima 09 February 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-05T22:39:44Z
No. of bitstreams: 1
HildericaLimaCampos_DISSERT.pdf: 1518298 bytes, checksum: 41cac6ede5b5c76dd7cadea1205d049e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-02-16T19:46:12Z (GMT) No. of bitstreams: 1
HildericaLimaCampos_DISSERT.pdf: 1518298 bytes, checksum: 41cac6ede5b5c76dd7cadea1205d049e (MD5) / Made available in DSpace on 2016-02-16T19:46:12Z (GMT). No. of bitstreams: 1
HildericaLimaCampos_DISSERT.pdf: 1518298 bytes, checksum: 41cac6ede5b5c76dd7cadea1205d049e (MD5)
Previous issue date: 2015-02-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / O tratamento de ?gua para abastecimento ? considerado como um grande benef?cio,
tendo em vista que, se for realizado de forma eficiente, propicia sa?de ?s pessoas.
Entretanto, ao considerar que uma ETA (Esta??o de Tratamento de ?gua) ? uma
ind?stria, pois em seu processo produtivo h? insumos e res?duos, ? necess?rio que
haja avalia??o e monitoramento constantes em cada ETA para verificar a melhor e
mais adequada maneira de tratar e dispor seus res?duos, minimizando, portanto, os
potenciais impactos ao meio ambiente. Os res?duos mais relevantes em ETA de
filtra??o r?pida s?o os provenientes das ?guas de lavagem de filtros. A realidade
mais observada em nosso pa?s ? o lan?amento destes res?duos (sem tratamento)
em mananciais, os quais s?o utilizados, na maioria das vezes, como fonte de
abastecimento de uma popula??o a jusante. O presente estudo avaliou indicadores
quantitativos e qualitativos de ?gua de lavagem de filtros em tr?s ETA - Itaitinga,
Maranguape e Pacatuba. Verificou-se que a ETA Maranguape, em termos de
capacidade instalada, ? a de maior porte. A ETA Itaitinga ? a que mais consome
?gua na lavagem de filtros. A ETA Pacatuba exibiu maior concentra??o de s?lidos
sediment?veis e suspensos totais, al?m de demanda qu?mica de oxig?nio e alum?nio
na ?gua de lavagem dos filtros. Os par?metros s?lidos sediment?veis e s?lidos
suspensos totais de todas as ETA estavam fora do padr?o de lan?amento de
efluentes em corpo aqu?tico preconizado pela resolu??o 154/2002 da SEMACE
(Superintend?ncia Estadual do Meio Ambiente do Cear?). Conclui-se que a ?gua de
lavagem dos filtros das ETA em estudo ultrapassam os valores permitidos em
legisla??o para serem descartados diretamente em manancial. Sugere-se como
alternativa de tratamento de res?duos, a constru??o de lagoas de sedimenta??o de
lodo e ainda, como forma de reaproveitamento da ?gua, o processo de recircula??o. / The water supply and treatment is considered as a great benefit considering that, if
done efficiently, provides public health. However, considering the WTP (Water
Treatment Plant) is an industry, with its inputs and waste generation, they must be
constantly evaluated and monitored to verify the best and most appropriate way to
process and dispose their waste, minimizing therefore the potential impacts to the
environment. By volume, the most significant waste is the rapid filter backwash water.
It is very common the disposal of this waste without treatment in water sources,
which are used, for the most part, as a water supply source of a downstream
population. This study evaluated quantitative and qualitative parameters in filter
backwash water in three WTP - Itaitinga, Maranguape and Pacatuba, located in
Cear? State, northeast of Brazil. It was found that the Maranguape WTP, in terms of
treatment capacity, is the larger. The Itaitinga WTP is the one that consumes more
water during filters washing. The Pacatuba WTP exhibited higher concentration of
total suspended and settleable solids, COD and aluminum in the filters backwash
water. It is noteworthy that the settleable solids and total suspended solids in all three
WTP are above the effluent discharge standard recommended by Resolution
154/2002 of SEMACE (State Superintendent of Environment of Cear?). It was
concluded that the filter backwash water from the study WTP exceeded the allowed
values for legislation to be disposed directly into surface water bodies. It is suggested
as an alternative to treat and recycle the filter backwashing water the construction of
sludge settling ponds.
|
23 |
Levantamento explorat?rio da composi??o e fra??es proteicas do leite bovino em propriedades leiteiras / Evaluation of composition and protein fractions from bovine milk on dairy farmsBarreto, Mayara Leilane de Jesus 27 February 2013 (has links)
Made available in DSpace on 2014-12-17T15:34:47Z (GMT). No. of bitstreams: 1
MayaraLJB_DISSERT.pdf: 1993520 bytes, checksum: a4115cc58db013fd3492bae607af2afe (MD5)
Previous issue date: 2013-02-27 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The direct relationship with the processing, industrial yield and price of
milk, the importance of the centesimal composition of milk and their protein fractions has
increased for both the dairy industry and for the producers, so it is important to identify the
possible causes on variation of these components. The aim of this study was to evaluate the
effect of the seasons, order of calving and lactation phase on milk composition and protein
fractions in dairy farms in the Agreste and Leste meso-regions, of Rio Grande do Norte
State (RN). Milk samples were taken in seven milk farms directly from the bulk tanks
except for one farm where samples were taken from higher milking cows producers and
heifers. The experiment was done in seven properties with milk samples taken directly
from the bulk tanks and in one property were collected from higher production cows and
heifers. Composition analyses were carried out for both experiments and sensorial trial was
performed for the second experiment only. The data results were submitted to analysis of
variance (ANOVA) and Tukey test performed for 5% significance level. In the first
experiment was observed response of the seasons, dry and rainy season; while in the
second, the effect of the order of calving and lactation phase had influence on milk
composition and protein fractions. There was significant response (p < 0.05) for season
effects but due to farms. The rainy season had higher averages in the protein, lactose, total
solids and nonfat dry extract. Multiparous cows had higher CCS, NUL and PCAS milk
contents; while, first calving heifers showed higher average for the sensory attribute, color
of milk. The final third of lactation was responsible for the elevation of the levels of almost
all milk components and their protein fractions / Mediante a crescente import?ncia da composi??o centesimal do leite e suas
fra??es proteicas, para a ind?stria de latic?nios e para os produtores, em fun??o da rela??o
direta com o processamento, rendimento industrial e pre?o do leite, torna-se relevante
verificar poss?veis causas de varia??o desses componentes. Dessa forma, objetivou-se com
este estudo avaliar o efeito das esta??es do ano (seca e chuvosa), da ordem de parto e da
fase de lacta??o sobre a composi??o do leite e suas fra??es proteicas em propriedades nas
mesorregi?es agreste e leste do Rio Grande do Norte - RN. O experimento foi realizado em
sete propriedades, com coleta de leite em tanques de expans?o e em uma destas por
amostragem do lote de vacas de maior produ??o e de novilhas. Foram realizadas an?lises
de composi??o do leite e sensorial. Os respectivos resultados foram analisados por meio da
an?lise de vari?ncia (ANOVA) com as poss?veis diferen?as entre as m?dias (p<0,05) pelo
teste de Tukey. N?o houve efeito da esta??o do ano nos componentes do leite. No entanto,
houve efeito de intera??o da esta??o do ano com a fazenda na prote?na, lactose, s?lidos
totais e no extrato seco desengordurado. Na composi??o do leite a ordem de parto
influenciou os teores de CCS, NUL e PCAS e na sensorial o atributo cor. Os est?dios de
lacta??o influenciaram os teores todos os componentes do leite, com exce??o do ESD
|
24 |
Os professores de ci?ncias e suas pr?ticas: uma proposta did?tica para o ensino do conte?do esta??es do anoJesus, Daniel Marcos de 26 September 2016 (has links)
Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2017-04-03T21:49:05Z
No. of bitstreams: 1
DANIEL disserta??o final.pdf: 4325548 bytes, checksum: b4560db31ae6473c5148330591094d47 (MD5) / Made available in DSpace on 2017-04-03T21:49:05Z (GMT). No. of bitstreams: 1
DANIEL disserta??o final.pdf: 4325548 bytes, checksum: b4560db31ae6473c5148330591094d47 (MD5)
Previous issue date: 2016-09-26 / In this work, we analyze the understanding of Science, Geography and Education?s teachers of S?o Miguel das Matas, Bahia, about teaching and learning process of Seasons content that has been reflected on the construction and using of a didactic material (model System Earth-Sun), developed from a workshop with teachers who teach science?s classes in elementary school. The methodology has been based in questionnaires, videos and experimental demonstrations. The results showed that many science?s teachers have difficulties regarding to the understanding of the Seasons content. As a result, we can say that a didactic workshop in Seasons concept could make better the understanding of this content. / Neste trabalho, analisamos a compreens?o dos professores de Ci?ncias, Geografia e Pedagogia da cidade de S?o Miguel das Matas, Bahia, a respeito do processo de ensino e aprendizagem do conte?do de Esta??es do Ano e refletimos sobre a constru??o e utiliza??o de um material did?tico (maquete do Sistema Terra-Sol), desenvolvido a partir de uma Oficina com os professores que ministram aulas de Ci?ncias no Ensino Fundamental. Na metodologia foram utilizados question?rios, v?deos e demonstra??es experimentais. Os resultados demonstraram que muitos professores de ci?ncias apresentam dificuldades com rela??o ao entendimento do conte?do Esta??es do Ano e que ao trabalhar com materiais did?ticos dentro da Oficina Did?tica puderam compreender este conte?do.
|
25 |
N?veis de ?cidos graxos e qualidade de ovos comerciais convencionais e enriquecidos com ?mega-3. / Fatty acid levels and quality of conventional and enriched omega-3 eggs.Cedro, Thaiz Marinho Magalh?es 29 August 2008 (has links)
Made available in DSpace on 2016-04-28T14:59:48Z (GMT). No. of bitstreams: 1
2008 - Thaiz Marinho Magalhaes Cedro.pdf: 1901514 bytes, checksum: e3897dc76edd8a3714a6678cf8139f8f (MD5)
Previous issue date: 2008-08-29 / 1160 eggs were utilized in four experiments were conducted in Eggs Analyses Laboratory of
the Institute of Animal Science of the Rural Federal University of Rio de Janeiro (UFRRJ)
using commercial eggs produced by two groups of laying hens line Isa Brown with 33 weekold.
In group 1, the birds were fed throughout their productive life with a basic diet of corn
and soybean meal, while in group 2, since 22? weeks-old of the hens, was added to the basic
diet 1.5% of marine algae substrate and 1.8% fish oil (production of enriched ω-3 eggs). In
experiment 1, whose aim was to evaluate the internal and external quality of conventional and
enriched ω-3 eggs stored at different temperatures, it was found that both types of eggs
studied had similar characteristics of internal and external quality. Eggs stored for 21 days at
25?C had lower averages for Haugh unit and yolk index and higher averages of albumen pH
and yolk pH when compared to other treatments related to temperature and period of storage.
There were no significant differences in egg shell thickness, shell weight and shell percentage
between the two types of eggs stored for 21 days, regardless of the temperature of storage. In
experiment 2 was assessed the influence of the season on the quality of enriched ω-3 eggs
stored in refrigerated environment. In this second issue was verify that the eggs collected in
the summer showed eggs weight and internal and external quality aspects lower than those
collected in winter. In this second issue was verify that the eggs collected in the summer
showed eggs weight and internal and external quality aspects lower than those collected in
winter. In this second issue was verify that the eggs collected in the summer showed eggs
weight and internal and external quality aspects lower than those collected in winter. The
storage affected negatively the eggs weight, Haugh unit and yolk index, but there was no
effect on the shell thickness. In experiment 3 was compared the fatty acids levels and
relationships in conventional and enriched ω-3 eggs. The enriched ω-3 eggs showed total
levels of ω-3 polyunsaturated (1839 mg/100g of yolk) and monounsaturated fatty acids
(10,744 mg/100g of yolk) higher than those of conventional eggs (927 and 7997 mg/100g of
yolk, respectively). Relations between polyunsaturated/saturated fatty acids (P/S) and between
ω-6/ω-3 of enriched eggs were close to the ideal estimated for human consumption (1.10 and
3.00, respectively). The conventional eggs had total levels of saturated (8740 mg/100g of
yolk) and ω-6 polyunsaturated fatty acids (9600 mg/100g of yolk) significantly higher than
the enriched ω-3 eggs (6640 and 5510 mg/100g of yolk, respectively). In Experiment 4, three
people individually assessed the intensity of yolk pigmentation with a color range. It was
found that conventional eggs had the yolk less pigmented enriched ω-3 ones. The storage at
different temperatures caused the appearance of dark spots in the egg yolks enriched. Based
on the results obtained in experimental conditions used it was found that enriched ω-3 eggs
showed high levels of ω-3 polyunsaturated fatty acids, appropriate balance of the relations
between P/S and between ω-6/ω-3 and good characteristics of internal and external quality,
thus those eggs can be considered an excellent alternative food for those consumers concerned
about eating healthy diets. / Foram utilizados 1160 ovos comerciais em quatro experimentos realizados no Laborat?rio de
An?lises de Ovos do Instituto de Zootecnia da Universidade Federal Rural do Rio de Janeiro
(UFRRJ) produzidos por dois grupos de poedeiras da linhagem Isa Brown com 33 semanas de
idade. No grupo 1, as aves foram alimentadas durante toda vida produtiva com ra??o a base
de milho e farelo de soja (produ??o de ovos convencionais), enquanto que no grupo 2, ? partir
da 22? semana de idade das aves, foi acrescentado a ra??o b?sica 1,5% de substrato de algas
marinhas e 1,8% de ?leo de peixe (produ??o de ovos enriquecidos com ω-3). No experimento
1, cujo objetivo foi avaliar a qualidade interna e externa de ovos comerciais convencionais e
enriquecidos com ω-3 armazenados em diferentes temperaturas, foi verificado que os dois
tipos de ovos estudados apresentaram caracter?sticas de qualidade interna e externa
semelhantes. Os ovos armazenados por vinte e um dias a 25?C apresentaram menores m?dias
para unidade Haugh e ?ndice de gema e maiores para pH do alb?men e da gema quando
comparado aos demais tratamentos relacionados a temperatura e per?odo de armazenamento.
N?o foram observadas diferen?as significativas para espessura, percentual e peso da casca
entre os dois tipos de ovos estocados por vinte e um dias, independentemente da temperatura
de armazenamento. No experimento 2 foi avaliada a influ?ncia da esta??o do ano sobre a
qualidade de ovos enriquecidos com ω-3 armazenados em ambiente refrigerado. Neste
segundo ensaio foi observado que os ovos coletados no ver?o apresentaram peso, qualidade
interna e externa inferior ao daqueles coletados no inverno. Com rela??o ao armazenamento,
foi verificado efeito negativo sobre o peso, unidade Haugh e ?ndice de gema, mas n?o houve
efeito sobre a espessura da casca destes ovos. No experimento 3, comparou-se os n?veis de
?cidos graxos e suas rela??es em ovos comerciais convencionais e enriquecidos com ω-3 e foi
verificado que os ovos enriquecidos com ω-3 apresentaram teores totais de ?cidos graxos
(AG) poliinsaturados da s?rie ω-3 (1839 mg/100g de gema) e de AG monoinsaturados (10744
mg/100g de gema) significativamente superiores aos dos ovos convencionais (927 e 7997
mg/100g de gema, respectivamente). As rela??es entre os ?cidos graxos
poliinsaturados/saturados (P/S) e entre ω-6/ω-3 dos ovos enriquecidos foram pr?ximas ao
ideal estimado para o consumo humano (1,10 e 3,00; respectivamente). Os ovos
convencionais apresentaram teores totais de AG saturados (8740 mg/100g de gema) e de AG
poliinsaturados da s?rie ω-6 (9600 mg/100g de gema) significativamente superiores aos dos
ovos enriquecidos ω-3 (6640 e 5510 mg/100g de gema, respectivamente). No experimento 4,
tr?s pessoas individualmente avaliaram a intensidade de pigmenta??o da gema com o aux?lio
de um leque colorim?trico. Foi verificado que os ovos convencionais apresentaram gema
menos pigmentada que os ovos enriquecidos com ω-3. O armazenamento em diferentes
temperaturas provocou o aparecimento de manchas escuras nas gemas dos ovos enriquecidos.
Com base nos resultados obtidos nas condi??es experimentais utilizadas concluiu-se que os
ovos enriquecidos com ω-3 apresentaram elevados n?veis de AG poliinsaturados da s?rie ω-3,
balan?o adequado das rela??es entre ω-6/ω-3 e P/S e boas caracter?sticas de qualidade interna
e externa, sendo desta forma, considerados uma excelente alternativa de alimento para aqueles
consumidores preocupados em ingerir dietas mais saud?veis.
|
26 |
Plataforma de monitoramento clim?tico automatizadaSantos, Cadu Calixto de Carvalho dos 30 October 2017 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-01-16T19:41:11Z
No. of bitstreams: 1
CaduCalixtoDeCarvalhoDosSantos_DISSERT.pdf: 2219353 bytes, checksum: 0762e65b5885ef46e7a24b785f1caf20 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-01-22T14:21:51Z (GMT) No. of bitstreams: 1
CaduCalixtoDeCarvalhoDosSantos_DISSERT.pdf: 2219353 bytes, checksum: 0762e65b5885ef46e7a24b785f1caf20 (MD5) / Made available in DSpace on 2018-01-22T14:21:51Z (GMT). No. of bitstreams: 1
CaduCalixtoDeCarvalhoDosSantos_DISSERT.pdf: 2219353 bytes, checksum: 0762e65b5885ef46e7a24b785f1caf20 (MD5)
Previous issue date: 2017-10-30 / Competir com players do mercado n?o ? tarefa f?cil, no entanto, as startups tem assumido um papel importante na economia mundial. Nessa perspectiva, este trabalho tem como objetivo demonstrar o potencial de uma startup e sua tecnologia, em rela??o ? players do mercado e suas tecnologias similares existentes, levando em considera??o aspectos como, viabilidade tecnol?gica, financeira e mercadol?gica. Para alcan??-lo, optou-se por uma pesquisa baseada em metodologias e abordagens: ?geis, empreendedoras e inovadoras, a partir de referencial bibliogr?fico e digital, bem como de experi?ncias em ambientes de inova??o. Dessa forma, buscou-se descrever as tecnologias similares existentes tendo em vista a meteorologia no Brasil e no mundo, bem como os representantes e fabricantes dessas tecnologias, no ?mbito das esta??es meteorol?gicas e dataloggers; apresentar a startup e a tecnologia desenvolvida relacionando com os players do mercado e suas tecnologias similares existentes, levando em conta quest?es de viabilidade tecnol?gica e financeira; e analisar as aplica??es da tecnologia desenvolvida considerando a startup e seus mercados-alvo, bem como outros setores. Desse modo, com base nas valida??es e provas de conceito realizadas, pode-se afirmar que, a startup e seu produto/servi?o tem potencial para competir com players do mercado. / Compete with the players in the Market is not easy, however starturps have been assuming an important role in the global economy. In this perspective, this work aims to show the potential of a startup and its technology, compared to market players and their similar technologies, mainly aspects such as technological, financial and marketing viability. To achieve this goal, we chose an research, based on methodologies and approaches: agile, entrepreneurs and innovative, from bibliographic and digital references, as well as experiences in innovation environments. In this way, we seek to describe the similar meteorological technologies in Brazil and in the world, as well as the representatives and manufacturers of these technologies, within the scope of current meteorological stations and dataloggers. Moreover, we seek to present the startup and developed technology relating to market players and their existing similar technologies, taking into account issues of technological and financial feasibility and to analyze the applications of the technology developed considering startup and its target markets as well as other sectors. Thus, based on the validations and proofs of concept, it can be stated that the startup and its product/service has the potential to compete with market players.
|
27 |
Efeitos da recircula??o de ?gua de lavagem de filtros em um sistema de filtra??o direta em escala de bancadaFreitas, Daianne Gomes de 24 March 2017 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T19:59:17Z
No. of bitstreams: 1
DaianneGomesDeFreitas_DISSERT.pdf: 2462931 bytes, checksum: ed5908264b65a0a984481f57c4a9b5d7 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-06T21:24:49Z (GMT) No. of bitstreams: 1
DaianneGomesDeFreitas_DISSERT.pdf: 2462931 bytes, checksum: ed5908264b65a0a984481f57c4a9b5d7 (MD5) / Made available in DSpace on 2017-06-06T21:24:49Z (GMT). No. of bitstreams: 1
DaianneGomesDeFreitas_DISSERT.pdf: 2462931 bytes, checksum: ed5908264b65a0a984481f57c4a9b5d7 (MD5)
Previous issue date: 2017-03-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Os res?duos gerados nas Esta??es de Tratamento de ?gua (ETA) s?o formados principalmente pelo lodo de decantadores e pela ?gua de lavagem dos filtros - ALF. A ALF representa a maior parcela de perda de ?gua, podendo compreender a at? 10% da vaz?o da esta??o. Uma alternativa para a destina??o desses res?duos ? a recircula??o na pr?pria esta??o. Dessa forma, al?m de representar uma redu??o nas perdas da esta??o, tamb?m diminui o consumo de energia e de ?gua. A presen?a de part?culas desestabilizadas em sua constitui??o e o residual de coagulante presentes na ALF podem auxiliar a remo??o de part?culas da ?gua bruta. Para que o reaproveitamento dos res?duos n?o prejudique a qualidade da ?gua tratada, ? essencial a avalia??o dos impactos causados por esse procedimento. O trabalho foi desenvolvido na ETA de Extremoz ? RN, que apresenta configura??o de esta??o convencional, apesar de operar como filtra??o direta. O presente estudo investigou as seguintes configura??es para recircula??o do efluente da lagoa de sedimenta??o, ALF bruta (isto ?, sem clarifica??o) e ap?s clarifica??o. Foram avaliadas diferentes taxas de recircula??o (0, 2, 5 e 8%) atrav?s de ensaios de tratabilidade no jarteste. Foram simulados tratamentos com as configura??es de filtra??o direta e filtra??o direta em linha, com e sem a etapa de oxida??o, utilizando diferentes doses de coagulante e oxidante. A ?gua bruta utilizada caracteriza-se por apresentar turbidez e cor em torno de 2 unT e 20 uH, respectivamente. A etapa de flocula??o n?o foi necess?ria, enquanto que a etapa de oxida??o foi essencial para se atender ao valor limite estabelecido pela legisla??o. A recircula??o da ALF n?o influenciou na qualidade da ?gua tratada, n?o apresentando diferen?a significativa entre os tipos de res?duos nem entre as taxas de recircula??o adotadas. / The residues generated in the Water Treatment Plants (WTP) are mainly formed by the sedimentation and the filter backwash water (FBWW). The FBWW represents the largest portion of water loss, and may comprise up to 10% of the station's flow. An alternative to the destination of this waste is the recirculation in the station itself. In this way, besides representing a reduction in the losses of the station, it also reduces the consumption of energy and water resources. The presence of destabilized particles in their constitution and the residual coagulant present in the FBWW can aid the removal of particles from the raw water. In order to ensure that the reuse of waste does not adversely affect the quality of the treated water, it is essential to assess the impacts caused by this procedure. The work was developed in WTP of Extremoz - RN, which presents conventional configuration but operates as direct filtration. The present study compared the recirculation of sedimentation pond effluent with crude FBWW, that is, without any type of treatment, and after being clarified in the laboratory - simulating a filler. The performance of recirculation at different recirculation rates (0, 2, 5 and 8%) was investigated through treatability tests in the reservoir. The raw water used is characterized by turbidity and color around 2 unT and 20 uH, respectively. The flocculation step was not necessary, whereas the oxidation step was essential to meet the limit value established by the legislation. The recirculation of the different residues in the different recirculation ratios did not influence the quality of treated water.
|
28 |
Avalia??o ecotoxicol?gica de efluentes industriais utilizando Danio rerio Hamilton-Buchanan, 1822 (TELEOSTEI, CYPRINIDAE)Castro, Ana Anita Alexsandra Seixas de 18 August 2008 (has links)
Made available in DSpace on 2014-12-17T14:01:58Z (GMT). No. of bitstreams: 1
AnaAASC.pdf: 1030405 bytes, checksum: bb02e90c043d50fd25eef69f599305a3 (MD5)
Previous issue date: 2008-08-18 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The industrial effluents are one of the main sources of water pollution. For an appropriate characterization and control of their discharges, the most efficient strategy is the integrated use of chemical, physical and ecotoxicological analyses. The aims of this study were to asses the efficiency of the treatment plant of a textile industry performing acute toxicity tests and physical-chemical analyses of the effluents before and after the treatment, besides evaluate the toxicity of the effluents of the Treatment System of Liquids Effluents (Sistema de Tratamento de Efluentes L?quidos - SITEL) of Distrito Industrial de Natal (DIN) and some of their physical-chemical variables. The species used in the ecotoxicological tests was the fish Danio rerio. The results showed that the treatment plant reduced significantly (around 50%) the toxicity of the raw textile effluent in only three of the seven tests but, in general, it promoted the reduction of the physical-chemical parameters analyzed. The toxicity and the physical-chemical factors of the effluents of SITEL of DIN varied among the tests and show the importance of monitoring their discharges in the Potengi river, one of the most important rivers of the Rio Grande do Norte state / Os efluentes industriais s?o uma das principais fontes de polui??o das ?guas. Para uma caracteriza??o adequada e controle de seus despejos, a estrat?gia mais eficiente ? o uso integrado de an?lises qu?micas, f?sicas e ecotoxicol?gicas. Os objetivos deste trabalho foram avaliar a efici?ncia da esta??o de tratamento de uma ind?stria t?xtil, atrav?s de testes de toxicidade aguda e de an?lises f?sico-qu?micas dos efluentes antes e ap?s o tratamento, al?m de avaliar a toxicidade dos efluentes do Sistema de Tratamento de Efluentes L?quidos (SITEL) do Distrito Industrial de Natal (DIN) e algumas de suas vari?veis f?sico-qu?micas. A esp?cie utilizada nos testes ecotoxicol?gicos foi o peixe Danio rerio. Os resultados mostraram que a esta??o de tratamento reduziu significativamente (cerca de 50%) a toxicidade do efluente t?xtil bruto em apenas tr?s dos sete ensaios realizados, mas de um modo geral, promoveu a redu??o dos valores dos par?metros f?sico-qu?micos analisados. A toxicidade e os fatores f?sico-qu?micos dos efluentes do SITEL do DIN variaram entre os testes e mostram a import?ncia de se monitorar suas descargas no rio Potengi, um dos rios mais importantes do Estado do Rio Grande do Norte
|
29 |
As Noites Mussetianas na L?rica Castroalvina / Les Nuits mussetiens dans la po?sie castroalvinaFernandes, Marcos Vin?cius 12 November 2012 (has links)
Made available in DSpace on 2014-12-17T15:07:01Z (GMT). No. of bitstreams: 1
MarcosVF_DISSERT.pdf: 6655009 bytes, checksum: 902e1ebd430240891cf43d76f28355c6 (MD5)
Previous issue date: 2012-11-12 / Governo do Estado da Paraiba / Ce m?moire de master a comme objectif ?tudier l influence du recueil Les Nuits d Alfred
de Musset dans la po?sie de Castro Alves. Nous allons proc?der ? une analyse textuelle des
po?mes A volta da primavera , Murm?rios da tarde et Adeus ? partir de la transposition
des th?mes trait?s par le po?te fran?ais dans La nuit d ao?t , La nuit de mai et La nuit
d octobre . A traves l intertextualit? manifest?e par des ?pigraphes de ces po?mes mussetiens,
nous trouvons des ressemblances et dissemblances ?ventuelles qui assurent d un rapport entre
ces deux auteurs. Le lyrisme romantique d orientation m?lancolique ?tablit des liens entre des
po?tes qui ont un concep cyclique du sentiment amoureux: de la naissance ? la mort, et de
celle-ci ? la renaissance. La femme, qui se trouve li?e aux ?v?nements naturels, change le
paysage, sa pr?sence ?tant une raison raison de joie et son absence, une souffrance. La nature
?voqu?e et ses saisons servent de d?cor vivant aux penchants d ?tats d esprit parmi les
amants. Alors, nous verront dans le premier po?me castroalvino l euphorie des noces
printani?res; La m?lancolie ?prouv?e au d?clin du jour et ses soupirs ?vanescents dans le
deuxi?me po?me; et dans le dernier, le deuil ferm? d un amant qui resiste ? accomplir le deuil
de l objet d amour / Esta disserta??o de mestrado se prop?e a estudar a influ?ncia da s?rie As Noites de Alfred
de Musset na poesia de Castro Alves. Nosso objetivo concerne na an?lise textual dos poemas
A volta da primavera , Murm?rios da tarde e Adeus a partir da transposi??o dos temas
do poeta franc?s em seus respectivos poemas, tamb?m objeto de nosso estudo: A noite de
agosto , A noite de maio e A noite de outubro . Atrav?s da intertextualidade manifesta por
ep?grafes destes poemas mussetianos, encontramos semelhan?as e eventuais dessemelhan?as
que possibilitam um di?logo significativo entre os dois autores. O lirismo rom?ntico de
orienta??o melanc?lica estreita os la?os dos poetas que apresentam uma concep??o c?clica do
sentimento amoroso: do nascimento ? morte, e desta ? ressurrei??o. A mulher associada aos
fen?menos naturais transforma a paisagem, sendo sua presen?a motivo de alegria e sua
aus?ncia de sofrimento. A natureza evocada com suas esta??es serve de cen?rio vivo ?s
disposi??es de ?nimo entre os amantes. Logo, veremos no primeiro poema castroalvino a
euforia das n?pcias primaveris; a melancolia prelibada com o entardecer e seus suspiros
evanescentes no segundo poema; e o ?ltimo poema, o luto fechado de um amante renitente em
aceitar a perda do objeto de amor
|
30 |
Emiss?o de radia??o eletromagn?tica n?o ionizante na cidade do Natal: caracteriza??o, avalia??o e modelamento com base na intensidade do campo el?trico e na taxa de exposi??oPinheiro, Fred Sizenando Rossiter 17 December 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-11-22T19:39:17Z
No. of bitstreams: 1
FredSizenandoRossiterPinheiro_TESE.pdf: 2936282 bytes, checksum: e043d67f2ec70c4303eadd2ce8383354 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-11-22T23:29:37Z (GMT) No. of bitstreams: 1
FredSizenandoRossiterPinheiro_TESE.pdf: 2936282 bytes, checksum: e043d67f2ec70c4303eadd2ce8383354 (MD5) / Made available in DSpace on 2017-11-22T23:29:37Z (GMT). No. of bitstreams: 1
FredSizenandoRossiterPinheiro_TESE.pdf: 2936282 bytes, checksum: e043d67f2ec70c4303eadd2ce8383354 (MD5)
Previous issue date: 2015-12-17 / O surgimento da Telefonia Celular, a partir dos anos 1990, e a constru??o fren?tica
de torres nas cidades assustou a popula??o, levou a comunidade cient?fica mundial e
os ?rg?os de controle ambiental a dar maior aten??o ?s ondas eletromagn?ticas n?o
ionizantes. Um estado pobre como o Rio Grande do Norte evoluiu a quantidade de
celulares em opera??o de 340 mil no ano 2002 para 4,6 milh?es em 2014. No RN a
quantidade de linhas celulares supera a pr?pria popula??o, com uma densidade de
128,98 acessos para cada 100 habitantes. Natal, a capital do RN, com 850 mil
habitantes, j? possui 882 Esta??es R?dio Base dos Sistemas celulares em 167,26 km2
de ?rea urbana. O objetivo do presente trabalho ? fazer um diagn?stico sobre a
exposi??o ? radia??o eletromagn?tica n?o ionizante em toda ?rea urbana da Cidade.
A metodologia usada levou em conta medi??es de intensidade das radia??es feitas
em 160 diferentes pontos da cidade. As medi??es foram feitas na faixa de 88MHz a
2.400 MHz. Os servi?os de telecomunica??es avaliados na pesquisa foram: TV
(Broadcasting), R?dio FM (Broadcasting), Sistemas Celulares e WLAN (IEEE
802.11bg).Foram considerados para compara??o os limites de exposi??o do ICNIRP
(InternationalCommission on Non IonizationProtection), par?metros: ?Intensidade de
Campo El?trico? e ?Raz?o de Exposi??o? (ER). Resultados: de acordo com as
medi??es realizadas, 48.48 % da exposi??o eletromagn?tica outdoor na cidade do
Natal decorre da radia??o emitida pelos transmissores de TV. Da mesma forma,
constatou-se que, em 77,2 % dos pontos pesquisados, a intensidade do campo
el?trico gerada pelas TVs supera todos os demais servi?os de telecomunica??es,
inclusive a Telefonia Celular. A Taxa de Exposi??o (ER) m?dia de Radia??o N?o
Ionizante verificada para a faixa de frequ?ncia pesquisada foi de 4,43. 10 -3, enquanto
o valor m?ximo foi de 7,67. 10-2. Foi desenvolvido modelo para estimativa do Campo
El?trico gerado pelos transmissores das TVs em qualquer ponto da cidade. Utilizouse
a T?cnica Estat?stica de Regress?o Multivariada, a partir das 160 amostras. As
equa??es finais obtidas permitem as estimativas com grau de precis?o R2 superior a
0,9, p<0,1. Constatou-se que o expoente de atenua??o para propaga??o de RF na
cidade varia entre 2,8 e 3,8. A exposi??o eletromagn?tica ? RNI em ambientes outdoor
em Natal est? em n?veis abaixo dos limites de seguran?a definidos pelo ICNIRP e
ANATEL. Os servi?os que mais contribuem para RNI em Natal s?o: 1-TV, 2-Sistema
Celular e 3-R?dios FMs. / The electromagnetic waves used in the telecommunication systems until the 1980?s
were considered by the governments environmental control organs as apparently
?clean? forms of energy, whose effects weren?t considered any harmful to people?s
health. The development of the mobile cellular telecommunication, beginning in the
1990?s, and the frenetic construction of antennas in the cities? urban areas scared the
population in general and turned the attention of the world?s scientific community to the
theme. In a poor Brazilian State, such as Rio Grande do Norte ? RN (GDP:R$ 51,4
billion in 2013) , the amount of cellular phones in operation went from 340.000 in 2002
to 4.6 million phones in 2014. In RN the number of cellular lines overcomes its own
population, with a density of 128.98 accesses for each 100 inhabitants. Natal, the
capital city of the State, with 850.000 inhabitants, already has 885 radio base stations
of the cellular systems in 167.26 km? of urban area. The data is from ANATEL (august
2015). The objective of this work is to make a diagnosis about the actual situation of
the emission of non-ionizing electromagnetic radiation in all urban area of the city of
Natal. The methodology used took into account measurements of the intensity of the
radiation taken in 160 different sites throughout the city. This radiation was measured
in the range of 88MHz to 2.400 MHz. The collected data was compared to the limits of
exposure of the ICNIRP (International Commission on Non Ionization Protection). The
ICNIRP parameters used as reference were: ?intensity of electric field? and ?exposure
ratio?. The telecommunication services researched were: TV broadcasting, FM radio
broadcasting, cellular systems and WLAN (IEE 802.11bg). The obtained results
allowed the drawing of a map comparing the data between the measured values and
the limits of exposure to RNI defined by ICNIRP and ANATEL. The evaluation criteria
used was the parameters Intensity of Electric Field and Exposure Ratio (ER). Results:
according to the measurements taken, 48.48% of the outdoor electromagnetic
exposure in the municipality of Natal are originated from TV transmitters. Similarly, in
77.2% of the researched locations, the intensity of the electric field originated from TVs
overcomes all the rest of the wireless telecommunication services, including the
cellular system. Based on the information that the radiation emitted by the TV
transmitters is the most relevant in the city, a model to estimate the intensity of the
electric field resulting from this service in any point in town was developed. This model
was developed based on multivariate regression techniques. The final equations obtained allowed the estimative of the electric field with a level of precision R2> 0,9
and p<0,1. It was found that the exponent RF propagation attenuation in Natal varies
between 2.6 and 2.8.The average Exposure Rate (ER) to NIR observed in the
researched frequency rate was of 4.43.10-3, while the maximum value was of 7.67. 10-
Conclusions: The results of the study demonstrated that the levels of electromagnetic
exposure to NIR in outdoor environments in the city of Natal are lower than the security
limits set by ICNIRP and ANATEL. The services that contribute most to NIR in Natal
are 1-TV, 2- Cellular System and 3-FM Radios.
|
Page generated in 0.0375 seconds