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Search Results: 1 - 10 of 5377 matches for " Wagner Paris "
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HOMFLY-PT skein module of singular links in the three-sphere
Luis Paris,Emmanuel Wagner
Mathematics , 2012,
Abstract: For a ring $R$, we denote by $R[\mathcal L]$ the free $R$-module spanned by the isotopy classes of singular links in $\mathbb S^3$. Given two invertible elements $x,t \in R$, the HOMFLY-PT skein module of singular links in $\mathbb S^3$ (relative to the triple $(R,t,x)$) is the quotient of $R[\mathcal L]$ by local relations, called skein relations, that involve $t$ and $x$. We compute the HOMFLY-PT skein module of singular links for any $R$ such that $(t^{-1}-t+x)$ and $(t^{-1}-t-x)$ are invertible. In particular, we deduce the Conway skein module of singular links.
Production and quality of coastcross conserted forage groundnut under nitrogen fertilization and different grazing layers Produ o e qualidade da consorcia o de coastcross com amendoim forrageiro adubada com nitrogênio em diferentes estratos sob pastejo
Ulysses Cecato,Wagner Paris,Claudio Roma,Veridiana Lim?o
Revista Brasileira de Saúde e Produ??o Animal , 2011,
Abstract: The objective was to evaluate the forage mass production and quality in the morphologic components in different layers of coastcross grass (Cynodon dactylon [L.] Pers cv Coastcross-1) in consortium with forage Groundnut (Arachis pintoi Krapovikas y Gregory cv. Amarillo) with and without N fertilization. The treatments were: coastcross + forage groundnut without N (CA0); with 100kg/ha of N (CA100); with 200 kg/ha of N (CA200); and coastcross exclusively with 200kg/ha of N per year (C200) in the spring, summer and fall. It was used a randomized block design in a split plot. The layers were from zero to 7cm above the soil, 8 to 14cm, and above 15cm. In the lower layers there was higher total forage mass production. For the grass fractions there was no difference in the lower and higher layers however it was observed highter mass production with highest levels of fertilization. The senescent material was higher in fall. The intermediate layer showed superior values in the spring and fall compared to summer as a result of grazing in this layer be constituted of highest percentage of culms witch presented highest quality. The quality values were higher in treatments with nitrogen fertilization. Objetivou-se avaliar a massa de forragem e qualidade bromatológica dos componentes morfológicos nos diferentes estratos do pasto de coastcross (Cynodon dactylon [L.] Pers cv Coastcross-1) em consorcio com amendoim forrageiro (Arachis pintoi Krapovikas y Gregory cv Amarillo) com e sem utiliza o de N. Os tratamentos foram: coastcross + amendoim forrageiro sem nitrogênio (CA0); com 100kg/ha de N (CA100); com 200kg/ha de N (CA200) e coastcross exclusiva com 200kg/ha de N por ano (C200) na primavera, ver o e outono. Utilizou-se um delineamento em blocos casualizados em esquema de parcelas subdivididas. Os estratos foram de zero a 7cm a partir do solo, de 8 a 14cm e acima de 15cm. Nos estratos inferiores verificou-se maior MF. Para as fra es da gramínea n o houve diferen as nos estratos mais baixos e altos, porém nos tratamentos com maiores níveis de aduba o a massa de forragem foi superior. O material senescente foi superior no outono. O estrato intermediário apresentou valores superiores na primavera e outono comparados ao ver o, consequência do pastejo deste estrato estar constituído de maior percentagem de colmos. O valor nutritivo foi superior nos tratamentos que receberam aduba o nitrogenada.
The use of N-alkanes to estimate intake and digestibility of coastcross-1 and Arachis pintoi mixed pasture Uso de N-alcanos para estimar o consumo e a digestibilidade da pastagem de coastcross-1 consorciada com "Arachis pintoi"
Wagner Paris,Ulysses Cecato,Nelson Fukumoto,Julio Cesar Damasceno
Revista Brasileira de Saúde e Produ??o Animal , 2009,
Abstract: The trial was carried out to evaluate the alkanes (C27 to C35) profile, dry matter intake and digestibility of Coastcross-1 and Arachis pintoi mixed pasture with or without nitrogen fertilization in two periods (December/2003 and April/2004). The treatments evaluated were: CA0 = Coastcross + Arachis pintoi without N; CA100 = Coastcross + Arachis pintoi with 100 kg of N; CA200 = Coastcross + Arachis pintoi with 200 kg of N and C200 = Coastcross with 200 kg of N. The experimental period was composed by 8 days, with 3 days for marker administration (C32 in cellulose pelets) and 5 days for fecal collection, directly from animal rectum. Sixteen animals were used and maintained on grazed area since June 2003. From December to April, for pasture constituents, there was predominance of n-alkanes with odd chain, mainly for those with higher length chain (C29, C31 and C33), excepting leaves blade of Coastcross that presented the C27 alkane in higher concentration than C33. The highest amounts of n-alkanes C31 and C33 occurred during December. Animal’s intake and DMD did not present differences (P>0.05). The values of DMD using n-alkanes were similar to in vitro DMD of leaves blade from Coastcross. O experimento foi realizado com o objetivo de determinar o perfil dos alcanos (C27 a C35), o consumo e a digestibilidade da matéria seca do pasto de Coastcross-1 consorciada com Arachis pintoi com e sem aduba o nitrogenada em dois períodos (dezembro/2003 e abril/2004). Os tratamentos avaliados foram: CA0 = Coastcross + Arachis pintoi sem N; CA100 = Coastcross + Arachis pintoi com 100 Kg de N; CA200 = Coastcross + Arachis pintoi com 200 kg de N e C200 = Coastcross com 200 kg de N. O período experimental foi de 8 dias, 3 dias para o indicador administrado (C32 em peletes de celulose) e 5 dias de coleta de fezes, diretamente no reto do animal. Utilizou-se um delineamento em blocos ao acaso com duas repeti es. Foram utilizadas 16 novilhas cruzadas. Nos períodos de dezembro e abril, para os constituintes do pasto, houve predomínio dos n-alcanos de cadeia ímpar, principalmente para aqueles de maior comprimento de cadeia (C29, C31 e C33), exce o para as laminas foliares da Coastcross que apresentou o alcano C27 em maior concentra o do que o C33. As maiores quantidades de n-alcanos C31 e C33 ocorreram no mês de dezembro. O consumo dos animais e a digestibilidade do pasto n o apresentaram diferen as (P>0,05). Os valores dos CDMS, com utiliza o dos n-alcanos, foram semelhantes aos CDMS in vitro das laminas foliares da Coastcross
The Dual of the Least-Squares Method  [PDF]
Quirino Paris
Open Journal of Statistics (OJS) , 2015, DOI: 10.4236/ojs.2015.57067

This paper presents the dual specification of the least-squares method. In other words, while the traditional (primal) formulation of the method minimizes the sum of squared residuals (noise), the dual specification maximizes a quadratic function that can be interpreted as the value of sample information. The two specifications are equivalent. Before developing the methodology that describes the dual of the least-squares method, the paper gives a historical perspective of its origin that sheds light on the thinking of Gauss, its inventor. The least-squares method is firmly established as a scientific approach by Gauss, Legendre and Laplace within the space of a decade, at the beginning of the nineteenth century. Legendre was the first author to name the approach, in 1805, as “méthode des moindres carrés”, a “least-squares method”. Gauss, however, used the method as early as 1795, when he was 18 years old. Again, he adopted it in 1801 to calculate the orbit of the newly discovered planet Ceres. Gauss published his way of looking at the least-squares approach in 1809 and gave several hints that the least-squares algorithm was a minimum variance linear estimator and that it was derivable from maximum likelihood considerations. Laplace wrote a very substantial chapter about the method in his fundamental treatise on probability theory published in 1812.

The Dual of the Maximum Likelihood  [PDF]
Quirino Paris
Open Journal of Statistics (OJS) , 2016, DOI: 10.4236/ojs.2016.61016
Abstract: The Maximum Likelihood method estimates the parameter values of a statistical model that maximizes the corresponding likelihood function, given the sample information. This is the primal approach that, in this paper, is presented as a mathematical programming specification whose solution requires the formulation of a Lagrange problem. A result of this setup is that the Lagrange multipliers associated with the linear statistical model (where sample observations are regarded as a set of constraints) are equal to the vector of residuals scaled by the variance of those residuals. The novel contribution of this paper consists in deriving the dual model of the Maximum Likelihood method under normality assumptions. This model minimizes a function of the variance of the error terms subject to orthogonality conditions between the model residuals and the space of explanatory variables. An intuitive interpretation of the dual problem appeals to basic elements of information theory and an economic interpretation of Lagrange multipliers to establish that the dual maximizes the net value of the sample information. This paper presents the dual ML model for a single regression and provides a numerical example of how to obtain maximum likelihood estimates of the parameters of a linear statistical model using the dual specification.
Estimation of CARA Preferences and Positive Mathematical Programming  [PDF]
Quirino Paris
Open Journal of Statistics (OJS) , 2018, DOI: 10.4236/ojs.2018.81001
Abstract: The purpose of this paper is to combine the estimation of output price risk and positive mathematical programming (PMP). It reconciles the risk programming presented by Freund with a consistent estimate of the constant absolute risk aversion (CARA) coefficient. It extends the PMP approach to calibration of realized production outputs and observed input prices. The results of this specification include 1) uniqueness of the calibrating solution, 2) elimination of the tautological calibration constraints typical of the original PMP procedure, 3) equivalence between a phase I calibrating solution and a solution obtained by combining phase I and phase II of the traditional PMP procedure. In this extended PMP framework, the cost function specification involves output quantities and input prices—contrary to the myopic cost function of the traditional PMP approach. This extension allows for a phase III calibrating model that replaces the usual linear technology with relations corresponding to Shephard lemma (in the primal constraints) and the marginal cost function (in the dual constraints). An empirical example with a sample of farms producing four crops illustrates the novel procedure.
Dynamics of yield and nutritional value for winter forage intercropping
Paris, Wagner;Marchesan, Renato;Cecato, Ulysses;Martin, Thomas Newton;Ziech, Magnos Fernando;Borges, Gisele Daiane Silveira;
Acta Scientiarum. Animal Sciences , 2012, DOI: 10.4025/actascianimsci.v34i2.11507
Abstract: the work was carried out to assess mass production and nutritional content of winter forages using lopsided oat (avena strigosa) and white oat (avena sativa) intercropped with ryegrass (lolium multiflorum) and vetch (vicia sativa l.). the species were intercropped as the following treatments: lopsided oat with ryegrass (lo+rg); white oat with ryegrass (co+rg); lopsided oat with vetch (lo+v); white oat with vetch (co+v); lopsided oat, vetch and ryegrass (lo+rg+v); and white oat, ryegrass and vetch (co+rg+v). the study evaluated total forage mass production of each intercropping and crude protein levels, neutral detergent fiber and in vitro digestibility coefficient of dry matter. the results indicate that forage yield of oats was higher in early assessments, and ryegrass and vetch were higher in the final evaluation period. the crude protein levels and neutral detergent fiber were higher at the start of the experiment for all evaluated treatments, and those including vetch intercropped with oats showed an increase in these parameters in the final period due to the presence of vetch, which has a more delayed cycle.
Produ??o de novilhas de corte em pastagem de Coastcross-1 consorciada com Arachis pintoi com e sem aduba??o nitrogenada
Paris, Wagner;Cecato, Ulysses;Branco, Antonio Ferriani;Barbero, Leandro Martins;Galbeiro, Sandra;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000100016
Abstract: this trial was carried out to evaluate forage mass (fm), daily accumulation rate (dar), forage offer (fo), stocking rate (sr), arachis pintoi percentage (app), average daily gain (adg) and gain per hectare (gph) of beef heifers under grazing in coastcross-1 and arachis pintoi mixed pasture during different seasons, from july 2003 to june 2004. the treatments were: ca0 = coastcross + arachis pintoi without n; ca100 = coastcross + arachis pintoi with 100 kg of n; ca200 = coastcross + arachis pintoi with 200 kg of n; and c200 = coastcross with 200 kg of n, distributed in a randomly block design, with two repetitions. pasture management was done through continuous grazing with variable stocking rate, using crossbred heifers with three test animals per treatment. the fm was 2641, 2431, 2760 and 2704 kg of dm/ha for ca0, ca100, ca200 and c200, respectively. treatments presented similar dar (66.12 kg of dm/ha) between pastures, with higher production in the summer, followed by spring and autumn, which were not different from each other, and the winter with the lowest value: 108.6; 71.7; 54.2; 30.6 kg of dm/ha, respectively. in the ca0 treatment, the highest fo and the lowest sr were obtained (4.0 au/ha). the highest sr and lowest fo were observed in treatments with nitrogen fertilization, without difference among them. the app in the mixture was higher in the spring, and for the ca0 treatment, with visual estimations were always higher in function of the lower dry matter percentage of this legume. for adg was higher for ca200 and c200 treatments in relation to ca100 and ca0 with values of 0.51, 0.51, 0.42 and 0.38 kg/day, respectively. the gph were above 1000 kg/ha/year and the summer presented the highest gain (221.4 kg/ha).
Structure and nutritive value of Coastcross -1 and “Arachis pintoi” mixed pasture, with or without nitrogen fertilization Estrutura e valor nutritivo da pastagem de Coastcross -1 consorciada com "Arachis pintoi", com e sem aduba o nitrogenada
Wagner Paris,Ulysses Cecato,Elias Nunes Martins,Veridiana Aparecida Lim?o
Revista Brasileira de Saúde e Produ??o Animal , 2009,
Abstract: This trial was carried out to evaluate the production and quality of leaf blade (LB), sheath + green stem (SGS), dead material (DE) forage structural constituents of Coastcross and Arachis pintoi whole plant (WPA) mixed pasture, under grazing, during February 2003 and June 2004. The treatments CA0 = Coastcross + Arachis without N; CA100 = Coastcross + Arachis with 100 kg of N; CA200 = Coastcross + Arachis with 200 kg of N and C200 = Coastcross with 200 kg of N were distributed in a randomly block design, with two replicates. Pasture management was done through continuous grazing with variable stocking rate. Analyses of crude protein (CP), neutral detergent fiber (NDF) and dry matter in vitro digestibility (DMIVD) were done to LB, SGS, and WPA. The production of structural constituents varied in agreement with total mass and forage. Coastcross SGS contributed for forage production, and the quality characteristics are acceptable for animal production. Treatments that received nitrogen presented the highest CP values, and similar NDF and DMIVD to treatments without nitrogen. Objetivou-se, com este trabalho, avaliar a produ o e composi o química de forragem nos constituintes estruturais lamina foliar (LF), bainha + colmo verde (BCV), material morto (MM) da Coastcross e da planta inteira de Arachis pintoi (AP) em consorcia o sob pastejo no período de julho de 2003 a junho de 2004. Os tratamentos CA0=Coastcross + Arachis sem N; CA100=Coastcross + Arachis com 100 kg de N/ha/ano; CA200=Coastcross + Arachis com 200 kg de N/ha/ano e C200=Coastcross com 200 kg de N/ha/ano foram distribuídos em um delineamento em blocos ao acaso, com duas repeti es. O manejo do pasto foi por meio de lota o contínua e carga animal variável. Foram realizadas as análises de proteína bruta (PB), fibra em detergente neutro (FDN) e digestibilidade in vitro da matéria seca (DIVMS) da pastagem para LF, BCV e AP. As produ es dos constituintes estruturais variaram de acordo com os períodos experimentais, e os tratamentos com aduba o apresentaram valores superiores de LF, principalmente nos períodos de primavera e ver o. Além da melhor composi o nutricional indicada pelas LF e AP, a BCV da Coastcross expressou características qualitativas aceitáveis para produ o animal. Os tratamentos que receberam nitrogênio apresentaram maiores valores de PB e teores semelhantes de FDN e DIVMS ao tratamento sem nitrogênio.
Use of slow release urea in the mineral supplementation of beef cattle Tifton-85 pasture Utiliza o de uréia de libera o lenta em sal mineral na suplementa o de bovinos de corte em pastagem de Tifton-85
Wagner Paris,Renato Marchesan,Paulo Emílio Fernandes Prohmann,Luis Fernando Glasenapp de Menezes
Semina : Ciências Agrárias , 2013,
Abstract: The present work to evaluate the effect of supplementation of urea release slow partial substitution of urea present in the common protein salt of heifers grazin Tifton-85 during the winter. The study was coducted in the period from May to September 2010. In an area of ??11.6 hectares of grazing Tifton-85 (Cynodon dactylon), divided into four paddocks of 2.9 acres, 36 heifers were kept testers ( Red Angus Nellore), treated as follows: Only mineralized salt (SM) protein salt with urea (SP); protein salt with 25% substitution of urea by slow degradation of urea (SPLD25) and protein salt with 50% substitution of urea by slow degradation of urea (SPLD50). There was no effect of different sources of supplementation on animal performance (P>0.05). However, differences were observed between the experimental periods, in consequence of the variation in chemical and structural composition of the forage. O presente trabalho objetivou avaliar o efeito da suplementa o com uréia de libera o lenta em substitui o parcial da uréia comum, presente no sal proteinado de novilhas pastejando em capim Tifton-85 no período do inverno. O trabalho foi realizado no período de maio a setembro de 2010, em uma área de 11,6 hectares de pastagem de Tifton-85 (Cynodon dactylon), dividida em quatro piquetes de 2,9 hectares. Foram mantidas 36 novilhas testers ( Red Angus Nelore), submetidas aos seguintes tratamentos: apenas sal mineralizado (SM); sal proteinado com uréia (SP); sal proteinado com 25% de substitui o da uréia por uréia de lenta degrada o (SPLD25); e sal proteinado com 50% de substitui o da uréia por uréia de lenta degrada o (SPLD50). N o houve efeito das diferentes fontes de suplementa o sobre o desempenho dos animais (P > 0,05), sendo recomendado a utiliza o de sal mineralizado que apresenta menor custo.
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