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Search Results: 1 - 10 of 54132 matches for " Carlos Humberto;Cassoli "
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Importance of calving diseases and risk factors on milk production of Holsteins cows Importancia das desordens do periparto e seus fatores de risco sobre a produ o de leite de vacas Holandesas
Carlos Humberto Corassin,Paulo Fernando Machado,Arlei Coldebella,Laerte Dagher Cassoli
Semina : Ciências Agrárias , 2011,
Abstract: This correlational study investigated the effects of the peripartum health disorders and your respective risk factors about the milk production, in the peak and to the 305 days in lactation. Holsteins cows (n = 522) of a commercial herd of the State of S o Paulo, had your health and nutritional status accompanied since the beginning of the period pre-calving to the end of the lactation. Occurrence of diseases, score of body condition (at the dry off and calving), daily milk productions and milk compositions, were recorded. For statistical analysis of the data, the logistics regression and the analysis of multiple regression were used. The obtained results demonstrated that the diseases of the peripartum and your risk factors affected the milk production with different effects in function of the lactation numbers, demanding this way, larger care with the prophylactic measures to avoid the diseases, and to maximize the production of milk and the reproduction of the animals. Este estudo correlacional investigou os efeitos das ocorrências sanitárias do periparto e seus respectivos fatores de risco sobre a produ o de leite, no pico e aos 305 dias em lacta o. Vacas Holandesas (n = 522) de um rebanho comercial do Estado de S o Paulo tiveram seu desempenho sanitário e nutricional acompanhados desde o início do período pré-parto até o final da lacta o. A ocorrência de doen as, os escores de condi o corporal (no pré-parto e parto), as produ es de leite e as composi es do leite foram registradas. Para análise estatística dos dados, foram utilizadas a regress o logística e a análise de regress o múltipla. Os resultados obtidos demonstraram que as doen as do periparto e seus fatores de risco afetaram a produ o de leite com efeitos diferentes em fun o do número de lacta es, exigindo desta maneira maior cuidado com ado o de medidas profiláticas para se evitar as doen as e maximizar a produ o de leite dos animais.
Contagem de células somáticas e produ??o de leite em vacas holandesas de alta produ??o
Coldebella, Arlei;Machado, Paulo Fernando;Demétrio, Clarice Garcia Borges;Ribeiro Júnior, Paulo Justiniano;Corassin, Carlos Humberto;Meyer, Paula Marques;Cassoli, Laerte Dagher;
Pesquisa Agropecuária Brasileira , 2003, DOI: 10.1590/S0100-204X2003001200012
Abstract: the goal of this paper was to evaluate if losses in milk yield due to increase in somatic cells count are proportional or independent of the level of production. a total of 7,756 observations, monthly collected from a single herd from september/2000 up to june/2002, were used. the lactation curve was modeled by the incomplete gamma function, considering the effects of lactation order, calving season, peripartum disorder incidence and body condition score at calving. somatic cells count was added to the model as a multiplicative factor, representing relative losses, and as an additive factor, representing absolute losses. the best model was chosen based on the information criteria of schwarz (bic). the losses are absolute, becoming evident from 14,270 cells/ml, and they are 184 and 869 g/day for each increase of one unit in the natural logarithm scale, starting from that somatic cells count, for primiparous and multiparous cows, respectively.
Contagem de células somáticas e produ??o de leite em vacas holandesas confinadas
Coldebella, Arlei;Machado, Paulo Fernando;Demétrio, Clarice Garcia Borges;Ribeiro Júnior, Paulo Justiniano;Meyer, Paula Marques;Corassin, Carlos Humberto;Cassoli, Laerte Dagher;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000300011
Abstract: the relationship between milk somatic cells count (scc) and milk yield has been the aim of countless researches in several countries; however, in brazil, the literature related to this subject is scarce. therefore, the objective of this study is to verify if the losses in milk yield due to scc increase are proportional to the yield, or absolute (independent of it) and starting from which scc, the losses become evident. for this study, 13.725 observations were used, collected monthly from 6 different herds, from january/2001 up to june/2002. the analysis model, for lactation curve, was based upon the incomplete gama function, considering the effects of lactation order, herd and calving season. the scc entered in that model in two ways: as multiplicative factor (representing relative losses) and as addictive factor (representing absolute losses). the best model was chosen based on the information criteria of schwarz (bic). it is concluded that the losses are absolute, becoming evident from 17.000 cells/ml, and they are 238 and 868 ml/day for each increase of one unit in the natural logarithm scale, starting from that scc, respectively, for primiparous and multiparous.
Entre la política exterior y la política interna: De la Proclama de la Neutralidad al Plan de Paz (1983-1989)
Cascante Segura,Carlos Humberto;
Diálogos Revista Electrónica de Historia , 2012,
Abstract: based on theconcept of the official memory, this article discusses the political internal objectives were pursued with the costa rican foreign policy elaborated between 1983 and 1989.for this purpose, the text establishes internal targets developed by the successive governments, of the period under study, attempted to achieve by means of its foreign policy. also, the article analyzes the instruments used for such purposes. it concludes that the foreign policy of the period can not be seen only from the international stage, but had a significant impact within the country.
The War on Drugs is Counterproductive, Once Again
Ortiz,Carlos Humberto;
Lecturas de Economía , 2009,
Abstract: a two-sector general equilibrium model that included drugs as basic goods was relatively successful at explaining the waste of resources that the war on drugs incurs (ortiz, 2003). due to the assumption of constant productivity, the model predicted the rise of the drug price with supply repression. yet plan colombia, an unparalleled effort to eradicate drug production in colombia, had no significant effect on drug prices. in order to correct the model two sources of productivity improvement in the drugs sector are examined. the modified model helps to understand why drug prices have remained stable, why global supply and demand have not diminished, and why coca plantations were spread throughout the nation under plan colombia.
APRENDIZAJE EN LA PRODUCCIóN DE CAPITAL, CRECIMIENTO ACELERADO Y CAMBIO ESTRUCTURAL
Ortiz,Carlos Humberto;
Cuadernos de Economía , 2008,
Abstract: based on a two-sector model of endogenous growth (rebelo 1991), where a consumption good and a capital good are produced, this paper analyzes the effect of assuming learning-by-doing in the capital-good sector. the modified model reproduces two patterns of long-run economic development: accelerated growth and structural change.
LUCHANDO INFRUCTUOSAMENTE CONTRA LA HIDRA: UN MODELO SENCILLO DEL NARCOTRáFICO
Ortiz,Carlos Humberto;
Cuadernos de Economía , 2002,
Abstract: a simple model of drug trafficking, which embodies this activity risks, is shown in this paper. the model helps to explain two stylized facts of this activity: the generation of extraordinary profits and strong reproduction ability under prohibition and repression. the model creates a direct link between the repression of supply, which has been the dominant strategy in the fight against drug trafficking, and the mentioned facts.
LA DESACELERACIóN ECONóMICA COLOMBIANA: SE COSECHA LO QUE SE SIEMBRA
Ortiz,Carlos Humberto;
Revista de Economía Institucional , 2009,
Abstract: the economic slowdown experienced in colombia since 1980 is explained by the structural stagnation of the national economy and the escalation of violence associated with the expansion of drug trafficking. the available data do not reject this hypothesis. the article sustains that de-industrialization and drug trafficking were forged in the same crucible: a development model that gradually integrates the national economy into world markets whilst abandoning the option of industrialization. moreover, it argues that the explosion of drug trafficking is due to the deepening of the war on drugs in the context of a growing and inelastic global demand.
The War on Drugs is Counterproductive, Once Again
Carlos Humberto Ortiz
Lecturas de Economía , 2009,
Abstract: A two-sector general equilibrium model that included drugs as basic goods was relativelysuccessful at explaining the waste of resources that the war on drugs incurs (Ortiz, 2003). Due to theassumption of constant productivity, the model predicted the rise of the drug price with supplyrepression. Yet Plan Colombia, an unparalleled effort to eradicate drug production in Colombia,had no significant effect on drug prices. In order to correct the model two sources of productivityimprovement in the drugs sector are examined. The modified model helps to understand why drugprices have remained stable, why global supply and demand have not diminished, and why cocaplantations were spread throughout the nation under Plan Colombia.
Considera o onsidera o da n o-linearidade física para as vigas de concreto armado, pelo procedimento refinado da NB1 = Consideration of physical non-linearity of reinforced concrete beams, using the NB1 refined procedure
Carlos Humberto Martins
Acta Scientiarum : Technology , 2008,
Abstract: Este trabalho apresenta um estudo sobre análise de vigas de concreto armado em que a n o-linearidade física para o material é implementada pelo procedimento refinado da NBR-6118. Este modelo considera a n o-linearidade física do concreto armado via diagramas de momento x curvatura de uma se o transversal. O modelo de diagramamomento x curvatura apresentado pelos Comentários Técnicos da NBR-6118 - CT-301 do Ibracon (ABNT, 2003) utiliza a deforma o média na armadura tracionada, onde se leva em conta a resistência do concreto tracionado entre fissuras (tension stiffening). Portanto, foiimplementado, em linguagem de programa o Fortran Power Station, o procedimento dado pela norma para a contribui o do concreto tracionado entre fissuras. Para comprovar a validade do procedimento implementado, s o realizados exemplos numéricos. This work presents a study on the analysis of reinforced concrete beams in which the physical non-linearity of the material isimplemented through the refined procedure in the Technical Comments of Brazilian code NBR-6118 - CT 301 / Ibracon. This model considers the physical non-linearity of the reinforced concrete through momentum-curvature diagrams of a cross-section. Themomentum-curvature diagram presented in the CT-301 (ABNT, 2003) uses medium deformation in the reinforcement, in which the tension stiffening of the reinforced concrete is taken into account. Using programming language Fortran Power Station, the expression given by the code for the contribution of the tension stiffening of the reinforced concrete was implemented. Finally, some results are presented to check the validity of the employed calculation process.
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