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Search Results: 1 - 10 of 31155 matches for " Jorge Victor;Coldebella "
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Influência dos níveis de umidade na colheita e nas temperaturas de secagem de gr?os de trigo sobre desempenho, rendimento e composi??o de carca?a de frangos de corte
ávila, Valdir Silveira de;Mazzuco, Helenice;Portella, José Antonio;Ludke, Jorge Victor;Coldebella, Arlei;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000600013
Abstract: this study was conducted to evaluate the influence of humidity levels at harvesting period and drying temperatures of wheat grain in isoprotein, isoenergy and isovolumetric diets on broiler performance. the wheat grains were harvested with 30, 16 and 13% of humidity levels and submitted to drying temperatures of 100, 70 and 40°c. the level of 13% of humidity was not submitted to drying. the diets were offered to birds in three distinct periods, 1-21; 22-35 and 36-42 days of age. the parameters evaluated were body weight gain, feed:gain ratio, feed intake and weight gain. during the three evaluated periods the body weight gain and during 22-35 days and 36-42 days the feed intake of broilers submitted to diets with wheat were higher. feed:gain ratio of broilers submitted to wheat diets during the 1-21 days period were lower. at 21 and 42 days of age, one bird representing the average body weight of each replicate was selected for processing and evaluation of carcass nutrient composition and crude energy content, however there were no differences for these parameters at both ages. birds representing the average body weight of all replicates were processed for determination of carcass yield at 42 days of age. in absolute terms carcass weights were higher than birds under the treatment with wheat, in spite of humidity at harvest and the following drying temperature applied. inclusion of wheat in broiler diets in levels of 50 % in substitution of corn is technically feasible during all the raising period (1 42 days), in spite of humidity at harvest and drying temperature.
Período de descanso dos suínos no frigorífico e seu impacto na perda de peso corporal e em características do est?mago
Dalla Costa, Osmar Antonio;Coldebella, Arlei;Costa, Mateus José Rodrigues Paranhos da;Faucitano, Luigi;Peloso, José Vicete;Ludke, Jorge Victor;Scheuermann, Gerson Neudí;
Ciência Rural , 2006, DOI: 10.1590/S0103-84782006000500038
Abstract: pre-slaughter events might result in qualitative and quantitative losses on pig carcasses in inadequate management conditions. this study was aimed at evaluating the resting time at the processing plant (pdf= 3, 5, 7, and 9 hours) and the pen position in the lorry's livestock compartment (pbo) on body weight loss (ppc), weight of stomach (full= pec and empty= pev), weight of stomach contents (pce) and stomach lesion score (elg) related to gastric ulcer. for this study, 192 females with average body weight of 130.0±9.9kg were used. the following effects were considered in the statistical analysis: block (season of the year), pdf, pbo and the interaction between block and pdf. there was no significant effect of pdf on the evaluated variables. for pbo, a significant effect was observed on body weight loss, with pigs transported in the frontal pens losing more body weight than those transported in middle and back pens. eleven percent of the animals showed elg characterizing gastric ulcer, while a high percentage of the pigs (41.9%) showed elg grade 1, which characterizes paracheratosis. it is concluded that pigs transported in the frontal pens of the lorry's livestock compartment do have higher body weight losses, and that increasing the resting time at the processing plant from 3 to 9 hours does not impact body weight losses or the incidence of gastric ulcer.
The Fire Station as an Essential Tool in Urban Community Development: The Case of Chepo, Panama  [PDF]
Jeffrey S. Smith, Jorge D. Coromac, Victor Raul Alvarez
Current Urban Studies (CUS) , 2016, DOI: 10.4236/cus.2016.43020
Abstract: As the world’s population becomes increasingly urban, efforts to improve the quality of life among the impoverished must turn to cities. The literature asserts that the most successful programs in the fight against poverty are those that are implemented and managed by local community members. Moreover, the personnel in charge of distributing aid must have: 1) the trust and confidence of the community, 2) experience with community outreach, 3) a record of disseminating useful information, and 4) a clear understanding of local cultural traditions. The fire department is an often overlooked community resource that fulfills these requirements. Within the city of Chepo, Panama the fire station has successfully by-passed the thick layers of bureaucracy and is effectively reaching the city’s urban poor. Fire departments in other cities throughout the Global South might consider emulating the example set by Chepo.
Adjustment of Model Parameters to Estimate Distribution Transformers Remaining Lifespan  [PDF]
Victor A. Jimenez, Adrian Will, Jorge Gotay, Sebastián Rodríguez
Smart Grid and Renewable Energy (SGRE) , 2018, DOI: 10.4236/sgre.2018.99010
Abstract: Currently, the electrical system in Argentina is working at its maximum capacity, decreasing the margin between the installed power and demanded consumption, and drastically reducing the service life of transformer substations due to overload (since the margin for summer peaks is small). The advent of the Smart Grids allows electricity distribution companies to apply data analysis techniques to manage resources more efficiently at different levels (avoiding damages, better contingency management, maintenance planning, etc.). The Smart Grids in Argentina progresses slowly due to the high costs involved. In this context, the estimation of the lifespan reduction of distribution transformers is a key tool to efficiently manage human and material resources, maximizing the lifetime of this equipment. Despite the current state of the smart grids, the electricity distribution companies can implement it using the available data. Thermal models provide guidelines for lifespan estimation, but the adjustment to particular conditions, brands, or material quality is done by adjusting parameters. In this work we propose a method to adjust the parameters of a thermal model using Genetic Algorithms, comparing the estimation values of top-oil temperature with measurements from 315 kVA distribution transformers, located in the province of Tucumán, Argentina. The results show that, despite limited data availability, the adjusted model is suitable to implement a transformer monitoring system.
Desempenho, características de carca?a, qualidade da carne e condi??o sanitária de suínos criados nas fases de crescimento e termina??o nos sistemas confinado convencional e de cama sobreposta
Dalla Costa, Osmar Antonio;Amaral, Armando Lopes do;Ludke, Jorge Vitor;Coldebella, Arlei;Figueiredo, Elsio Antonio Pereira de;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000800033
Abstract: the objective of this study was to evaluate the effect of housing system on live performance, carcass characteristics, meat quality, and the sanitary condition of pigs raised in six different systems. a total of 803 ms58 x (landrace x large white) hybrid type pigs was used in seven subsequent lots, during the nursery and growing-finishing phases. at the nursery period, the systems evaluated were: conventional (co), deep litter (cs), and intensive free range (siscal), while during the growing-finishing phase only the co and cs systems were evaluated, being the cs system subdivided into three substrates (wheat straw, rice hulls and wood shaving). the factors considered on the statistical analysis were lot, treatment (combination of housing type used during nursery and growing-finishing phases), age (84, 105, 126, 147 e 160 days), and the interaction treatment x age. a significant effect of housing type was observed on weight gain, carcass characteristics, and weight of heart, liver, full stomach and stomach content. animals housed on conventional treatment had higher (p<0.05) weight gain (824 vs. 779g), higher hot carcass weight (75 vs. 69kg) and higher fat thickness (18 vs. 17mm) than the ones raised on deep litter, however, these, on the other hand, presented larger (p<0.05) gut content (360 vs. 204g) and less degree of gut lesion than those of the conventional treatment, eventhough with higher sneeze prevalence. the housing system did not influence the health, however pigs housed on deep litter system during the growing-finishing phase presented lower performance and carcass values than the ones housed in the conventional housing system despite the housing system used during the nursery phase.
A chilean seismic regionalization through a Kohonen neural network
Jorge Reyes,Victor H. Cardenas
Physics , 2008,
Abstract: A study of seismic regionalization for central Chile based on a neural network is presented. A scenario with six seismic regions is obtained, independently of the size of the neighborhood or the reach of the correlation between the cells of the grid. The high correlation between the spatial distribution of the seismic zones and geographical data confirm our election of the training vectors of the neural network.
Efeito do manejo pré-abate sobre alguns parametros fisiológicos em fêmeas suínas pesadas
Dalla Costa, Osmar Antonio;Ludke, Jorge Vitor;Coldebella, Arlei;Kich, Jalusa Deon;Costa, Mateus José Rodrigues Paranhos da;Faucitano, Luigi;Peloso, José Vicente;Dalla Roza, Darlan;
Ciência Rural , 2009, DOI: 10.1590/S0103-84782009000300033
Abstract: the aim of the research was to evaluate the effect of pig lairage time (pdf=3, 5, 7 and 9 hours) and evaluate the effect of pig position into the truck (pbo) during transportation to slaughterhouse, in winter or summer conditions, on some physiologic parameters evaluated on 64 heavyweight females with mean liveweight of 130kg during pre-slaughter events. the following effects were considered in the statistical analysis of variance model: block (bl=summer farm or winter farm), pdf, pbo and interaction (block x pdf), under other factors. the pdf influenced significativelly blood lactate and saliva cortisol levels. pig submitted to 5 and 7 hours of lairage had higher levels of lactate when compared to pigs submitted to 3 and 9 hours of lairage. during transport the heart rate were higher than in other pre-slaughter events. it is concluded that increasing pdf above 3 hours had no effects on heart frequency, glucose and cpk levels and salivary cortisol levels but affects the blood lactate levels.
Tempo de jejum na granja sobre o perfil hormonal e os parametros fisiológicos em suínos de abate pesados
Dalla Costa, Osmar Antonio;Ludke, Jorge Vitor;Costa, Mateus José Rodrigues Paranhos da;Faucitano, Luigi;Coldebella, Arlei;Kich, Jalusa Deon;Peloso, José Vicente;Dalla Roza, Darlan;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000800032
Abstract: the aim of this study was to evaluate the effect of fasting time on the farm (tjg) and the position of the animals on truck compartment during transport to slaughterhouse in the hormonal and physiological status of heavy-weight swine in order to obtain future management improvements and to reduce meat quality downgrades. sixty-four females obtained from two farms and averaging 133+11kg body weight were used. fasting time evaluated on farms were 9, 12, 15 and 18 h while the positions considered in the truck were box (front, middle, and back), deck (under and upper level) e side (right and left). swine blood concentration of glucose, lactate and cpk were evaluated at slaughter. cortisol concentration on saliva (ccs) was evaluated on the farm (24 hours before uploading and after loading) and at slaughterhouse (after downloading and before slaughter). hearth frequency was continuously evaluated during pre-slaughter management. interaction between tjg and moment of salivary cortisol sampling and heart rate data recording were observed. ccs and heart rate values increased from farm to truck downloading at slaughterhouse, while pre-slaughter resting reduced (p<0.05) the values. the ccs values ranged in a gradient fashion in function of tjg and moment of salivary cortisol sampling in the following manner: pigs submitted to 18 hours of fasting showed smallest changes (p<0.05) of ccs during the pre-slaughter management when compared with ccs of pigs submitted to lower fasting times and, between those, the animals with 9 hours of fasting showed the greatest (p<0.05) variations. before slaughter swine submitted to 9 hours of fasting at farm presented the highest values (p<0.05) of ccs when compared with the other fasting times evaluated. it is concluded that pre-slaughter management conditions affect (p<0.05) the salivary cortisol levels and heart rate but the evaluated tjg had no effects (p>0.05) on glucose, lactate and cpk levels at slaughter time.
Tempo de jejum dos suínos no manejo pré-abate sobre a perda de peso corporal, o peso do conteúdo estomacal e a incidência de úlcera esofágica-gástrica
Dalla Costa, Osmar Antonio;Costa, Mateus José Rodrigues Paranhos da;Ludke, Jorge Vitor;Coldebella, Arlei;Kich, Jalusa Deon;Peloso, José Vicente;Faucitano, Luigi;Dalla Roza, Darlan;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000100032
Abstract: the objective of this study was to evaluate the effect of fasting time period (9, 12, 15 and 18 hours) at the farm (tjg) and the pig?s position in the lorry?s livestock compartment (pbo) during the transport from the farm to the processing plant on: body weight loss (ppc), weight of stomach (full= pec and empty= pev), weight of stomach contents (pce), and incidence of gastric ulcer (elg). a total of 192 females with average 34.51±11.80kg of body weigh were used. the statistical model considered the effects of: block (season, bl), tjg, pbo and the interaction between bl and tjg. there was a significant effect of tjg only on stomach content. there was no effect of pbo on any of the evaluated variables. a pec inferior to 500g was observed in 90.3% of the animals, while 8.56% of the pigs presented pec between 500 and 800g. incidence of elg was low (14.97%), and among the elg animals, 13.90% showed grade 1 lesion, and 1.09% grade two lesion. as a conclusion, pigs submitted to a fasting period of 15 hours have less stomach contents at the processing.
Atomic orbitals and their representation: can 3-D computer graphics help conceptual understanding?
Trindade, Jorge;Fiolhais, Carlos;Gil, Victor;
Revista Brasileira de Ensino de Física , 2005, DOI: 10.1590/S0102-47442005000300004
Abstract: quantum mechanics is a non-intuitive subject. for example, the concept of orbital seems too difficult to be mastered by students who are starting to study it. various investigations have been done on student's difficulties in understanding basic quantum mechanics. nevertheless, there are few attempts at probing how student's understanding is influenced by appropriate visualization techniques, which are known to help conceptual understanding. ''virtual water'' is a 3-d virtual environment we have designed and built to support the learning of physics and chemistry at final high school and first-year university levels. it focuses on the microscopic structure of water and explores, among others, atomic and molecular orbitals. having asked a group of first-year students of sciences and engineering courses at the university of coimbra, portugal, to describe how they conceive electrons in atoms we found some common misconceptions. we have tried, with partial success, to overcome them by making students explore our virtual environment. the most relevant characteristics of the virtual environment which contributed to student's conceptual understanding were 3-d perception and navigation.
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