Resgate e propagação de material crioulo de abacaxi em Santa Catarina

TCC (graduação em Agronomia) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, 2008Apostando na tendência de organizações públicas em fomentar a reativação da produção de abacaxi no litoral catarinense, realizou-se estágio com resgate e propagação de variedades crioulas de abacaxi para revitalizar sua cultura no litoral do Estado de SC, e como alternativa para a substituição da cultura do fumo. Foram coletadas 10 variedades crioulas das quais foram excisadas gemas, as quais foram introduzidas in vitro. Os genótipos utilizados para a realização dessas atividades foram originados de um programa de resgate destes materiais, iniciado na década de 1980, e operacionalizado em conjunto entre a Epagri e o CCA/UFSC. Os materiais genéticos foram posteriormente cultivados no Campo Experimental de Jaguaruna, vinculada à Estação Experimental da Epagri de Urussanga. Foram empregadas várias metodologias para a multiplicação e aclimatização das mudas geradas no processo de micropropagação, visando a multiplicação massal de mudas isentas de pragas e doenças. A partir disto pretende-se estabelecer um banco de plantas matrizes para distribuição junto aos agricultores do litoral visando à revitalização desta atividade

Effect of ammonium concentration on alcoholic fermentation kinetics by wine yeasts for high sugar content

Kinetics of alcoholic fermentation by Saccharomyces cerevisiae wine strains in a synthetic medium with high sugar content were established for different nitrogen initial content and are presented for 4 strains. The composition of the medium was close to grape must except that the nitrogen source consisted mainly in ammonium and was varied from 120 to 290 mg N/L assimilable nitrogen. The overall nitrogen consumed was also estimated in order to determine nitrogen requirement variability. The effect of assimilable nitrogen was in general greater on sugar consumption rates than on growth and 3 kinds of effect on sugar consumption rates were observed: i) existence of an optimal initial nitrogen level for a maximal sugar consumption rate (inhibition if excess), ii) no effect of nitrogen beyond the intermediary level (saturation), iii) sugar consumption rate proportional to the initial nitrogen level (activation). In all cases, the amount of consumed nitrogen increased with its initial concentration and so did the fructophilic capacity of the strains. The optimal requirement varied from 0.62 to 0.91 mg N per g of sugars according to the different strains. There was no general correlation between the sugar assimilation rates and the nitrogen requirement

Agencias de viajes: nuevos retos en la industria del turismo

El caso muestra el ingreso de un recién graduado del programa Especialización en Administración a una empresa familiar dentro de un sector económico dinámico como el turismo, el cual se ve afectado por múltiples variables socioeconómicas comoel poder adquisitivo de la sociedad, la cultura de los diferentes pueblos y su concepción del turismo, la violencia y la tendencia mundial a la globalización que empuja constantemente a la masificación de los proveedores de productos y servicios mediante alianzas estratégicas entre los diferentes participantes de la cadena de valor de un mismo renglón o de diferentes segmentos con el fin de reducir costos y ser más competitivos y atractivos a los clientes. El recién graduado debe identificar el nuevo rol de las agencias de viaje dentro de la cadena de valor de la industria del turismo, de tal forma que la pequeña agencia de viajes sea un negocio viable y sostenible en el largo plazo.Sector turismo, Agencias de viajes, Empresas familiares, Cadena de valor, Transporte aéreo

An LP-Based Approach for Goal Recognition as Planning

Goal recognition aims to recognize the set of candidate goals that are compatible with the observed behavior of an agent. In this paper, we develop a method based on the operator-counting framework that efficiently computes solutions that satisfy the observations and uses the information generated to solve goal recognition tasks. Our method reasons explicitly about both partial and noisy observations: estimating uncertainty for the former, and satisfying observations given the unreliability of the sensor for the latter. We evaluate our approach empirically over a large data set, analyzing its components on how each can impact the quality of the solutions. In general, our approach is superior to previous methods in terms of agreement ratio, accuracy, and spread. Finally, our approach paves the way for new research on combinatorial optimization to solve goal recognition tasks.Comment: 8 pages, 4 tables, 3 figures. Published in AAAI 2021. Updated final authorship and tex

Effect of temperature on Brettanomyces bruxellensis: metabolic and kinetic aspects

The effect of temperatures ranging from 15 to 35 °C on a culture of Brettanomyces bruxellensis was investigated in regards to thermodynamics, metabolism, and kinetics. In this temperature range, we observed an increase in growth and production rates. The growth behavior was well represented using the Arrhenius model, and an apparent activation energy of 16.61 kcal/mol was estimated. A stuck fermentation was observed at 35 °C as represented by high cell death. The carbon balance established that temperature had no effect on repartition of the glucose consumption between biomass and products. Hence, the same biomass concentration was obtained for all temperatures, except at 35 °C. Moreover, using logistic and Luedeking–Piret models, we demonstrated that production rates of ethanol and acetic acid were partially growth associated. Parameters associated with growth (αeth and αaa) remained constant with changing temperature, whereas, parameters associated with the population (βeth and βaa) varied. Optimal values were obtained at 32 °C for ethanol and at 25 °C for acetic acid

Landmark-Based Heuristics for Goal Recognition

6 volumes http://www.aaai.org/Press/Proceedings/aaai17.phpPublisher PD