Academic literature on the topic 'Feed management. eng'
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Journal articles on the topic "Feed management. eng"
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MacLachlan, D. J., B. J. Blaney, L. G. Cook, E. Klim, R. Scholl, M. Sexton, J. Spragg, and R. Watts. "A review of potential contaminants in Australian livestock feeds and proposed guidance levels for feed." Animal Production Science 53, no. 3 (2013): 181. http://dx.doi.org/10.1071/an12048.
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Contaminants of man-made and natural origin need to be managed in livestock feeds to protect the health of livestock and that of human consumers of livestock products. This requires access to information on the transfer from feed to food to inform risk profiles and assessments, and to guide management interventions such as regulation or Hazard Analysis Critical Control Point approaches. This paper reviews contaminants of known and potential concern in the production of livestock feeds in Australia and compares existing but differing state and national regulatory standards with international standards. The contaminants considered include man-made organic chemical contaminants (e.g. legacy pesticides), elemental contaminants (e.g. arsenic, cadmium, lead), phytotoxins (e.g. gossypol) and mycotoxins (e.g. aflatoxins). Reference is made to scientific literature and evaluations by regulators to propose maximum levels that can be used for guidance by those involved in managing contamination incidents or developing feed safety programs.
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Neal, Mark, Jane Kay, Sally Peel, and Sean McCarthy. "A decision-support tool for autumn management in a spring-calving pasture-based dairy system." Animal Production Science 57, no. 7 (2017): 1343. http://dx.doi.org/10.1071/an16468.
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Success in a pasture-based dairy system relies on matching feed supply and feed demand in a profitable manner. Autumn is an important period for decision making to maximise current-season profitability, while ensuring key targets such as cow body condition score and the level of average pasture cover are met for the upcoming season. There are many tactical management strategies for farmers to consider during autumn to ensure that profitability is maximised in the current and next season (e.g. feeding crops, purchasing or using available supplementary feeds, reducing milking frequency, grazing off young stock, culling, or drying off cows). The complexity of trade-offs among these factors from January to calving, and the need to assess the impact of each of these on seasonal profitability led to the development of the ‘DairyNZ Autumn Management Resource’. This resource is an energy-based model that calculates the profit from different management strategies in pasture-based spring-calving systems. Feed demand is initially set to ensure that target body condition is achieved for the next season, and can then be altered using variables such as milking frequency, number of cows in milk and stock grazing on-farm. The assumption is made that energy supply comes from grazed pasture and crop first, followed by conserved forages, with the opportunity to fill remaining gaps with purchased feed. The model is a decision-support resource for farmers during the autumn that compares the economics of different management strategies in the current season, while ensuring that the performance in the next season is not compromised.
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Osei-Amponsah, R., B. B. Kayang, A. Naazie, M. Tiexier-Boichard, and X. Rognon. "Phenotypic characterization of local Ghanaian chickens: egg-laying performance under improved management conditions." Animal Genetic Resources/Ressources génétiques animales/Recursos genéticos animales 56 (June 2015): 29–35. http://dx.doi.org/10.1017/s2078633615000041.
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SummaryEgg production performance of 571 local Ghanaian chickens and 107 SASSO T44 chickens kept under improved management conditions were analysed. Average egg weight, hen-day egg production and feed conversion ratio (FCR) were determined for the three experimental chicken ecotypes. Hen-day production was significantly (P< 0.05) higher in the savannah local chicken ecotype than the forest ecotype and SASSO T44 chickens. Egg weights of local Ghanaian chickens compared favourably with values reported for local chickens in Africa. On the average, SASSO T44 had significantly (P< 0.05) higher egg weights and feed intake compared with the local chicken ecotypes. The local chicken ecotypes on the other hand, had significantly (P< 0.05) better feed conversion ratios than SASSO T44 chicken. Local Ghanaian chicken ecotypes have a more efficient FCR per every unit of egg produced compared with the control population. Low feed intake, good feed conversion ratios and adaptation to the environment are traits local chicken harbour which can be exploited in future breeding programmes to improve on chicken meat and egg production in Ghana. Ghanaian local chickens could thus be a valuable genetic resource for the development of an efficient egg production chicken breed adaptable to the humid tropical climates.
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AYANWALE, A. B., and A. S. BAMIRE. "COSTS AND RETURNS IN ALTERNATIVE POULTRY EGG PRODUCTION MANAGEMENT SYSTEMS IN TWO LOCAL GOVERNMENT AREAS OF OGUN STATE OF NIGERIA." Nigerian Journal of Animal Production 23, no. 2 (January 12, 2021): 193–98. http://dx.doi.org/10.51791/njap.v23i2.2370.
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Costs and returns involved in the intensive and semi-intensive management systems of poultry egg production were examined in Ijebu-Ode and Odogbolu Local Government Areas of Ogun State in Nigeria with a view identifying the more profitable of the two systems. The free systems. Data obtained through structured questionnaires from the to feed and is suitable where there are no respondents who were selected through the simple random sampling procedure. Descriptive and Budgetary techniques were employed to analyse the data. Results from the analysis revealed that intensive poultry management systems are more profitable than semi-intensive as indicated by the Benefit-Cost ratio estimated at 2.2:1 and 2.0:1two systems respectively. Further analysis revealed that the majority (50%) of farmers under the Intensive system of management undertook egg production enterprise only against none under the semi-intensive management system. Egg production averaged 132 egg\ bird and 68 eggs/bird respectively for a semi-intensive system. It was concluded that poultry egg production under an intensive management system needs to be encouraged under the present economy in the country. This could be effected by providing the right economic policies aimed at reducing the cost of livestock feeds and day old chicks.
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Patel, AB, NJ Bhagora, FP Savaliya, RK Mishra, and VD Lonkar. "Performance of Ankleshwar Chicken Reared under Intensive Management System in Gujarat." INDIAN JOURNAL OF VETERINARY SCIENCES AND BIOTECHNOLOGY 15, no. 04 (May 15, 2020): 47–50. http://dx.doi.org/10.21887/ijvsbt.15.4.9.
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The productive and reproductive performance of Ankleshwar chicken under intensive management for three successive generations (S0, S1, and S2) was studied at Poultry Research Station, AAU, Anand, Gujarat. Total 546, 422, and 465 pullets of S0, S1, and S2 generation, respectively, were housed in individual layer cages at 16 weeks of age. Production parameters, viz., body weight (g) of day-old, 4th, 8th, 16th and 40th weeks of age; total feed consumption (kg) per bird; mortality (%) during 0-8, 9-16 and 17-40 weeks of age; total egg production (no.) up to 40 weeks of age and average egg weight (g) at the end of 28th and 40th week of age were recorded for three generations. The reproductive parameters, viz., age at sexual maturity (days), fertility (%) and hatchability (%) on Total Egg Set basis (TES) as well as hatchability on Fertile Egg Set basis (FES) were calculated. It was concluded that the rearing of Ankleshwar chicken in intensive management over three (S0, S1 and S2) generations significantly (p≤0.05) improved body weight at 4th, 8th and 16th weeks of age, required less feed, improved fertility and showed significantly (p ≤0.05) early age at sexual maturity (154 days) in S2 generation with significant (p≤0.05) decreasing trend in egg production up to 40th week of age from S0 to S2 generation. Hatchability showed a decreasing trend in progressive generations. The birds have shown better livability reared under intensive management in Gujarat.
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Leinonen, Ilkka, and Ilias Kyriazakis. "How can we improve the environmental sustainability of poultry production?" Proceedings of the Nutrition Society 75, no. 3 (March 3, 2016): 265–73. http://dx.doi.org/10.1017/s0029665116000094.
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The review presents results of recent life cycle assessment studies aiming to quantify and improve the environmental performance of UK poultry production systems, including broiler meat, egg and turkey meat production. Although poultry production has been found to be relatively environmentally friendly compared with the production of other livestock commodities, it still contributes to environmental impacts, such as global warming, eutrophication and acidification. Amongst different sub-processes, feed production and transport contributes about 70 % to the global warming potential of poultry systems, whereas manure management contributes about 40–60 % to their eutrophication potential and acidification potential, respectively. All these impacts can be reduced by improving the feed efficiency, either by changing the birds through genetic selection or by making the feed more digestible (e.g. by using additives such as enzymes). However, although genetic selection has the potential to reduce the resources needed for broiler production (including feed consumption), the changing need of certain feed ingredients, most notably protein sources as a result of changes in bird requirements may limit the benefits of this strategy. The use of alternative feed ingredients, such as locally grown protein crops and agricultural by-products, as a replacement of South American grown soya, can potentially also lead to improvements in several environmental impact categories, as long as such feeding strategies have no negative effect on bird performance. Other management options, such as improving poultry housing and new strategies for manure management have also the potential to further improve the environmental sustainability of the poultry industries in Europe.
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Owens, Fredric N., and Robert B. Hicks. "Can net energy values be determined from animal performance measurements? A review of factors affecting application of the California Net Energy System1." Translational Animal Science 3, no. 3 (June 1, 2019): 929–44. http://dx.doi.org/10.1093/tas/txy130.
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Abstract The California Net Energy System (CNES) can reliably project performance of feedlot cattle based on three factors: expected dry matter intake (DMI), some index of degree of maturity of cattle linked to body composition (fat and protein content), and an estimate of the net energy (NE) content of the diet. The CNES allowed feedlot managers to monitor growth and efficiency of individual pens of cattle. Through assigning distinct values for net energy for maintenance (NEm) vs. net energy for gain (NEg) of the metabolizable energy (ME) present in feeds, the CNES enables valid economic comparisons among feedstuffs, an appraisal not feasible based on total digestible nutrients or digestible energy (DE) values. Because NEm and NEg are linked mathematically to ME, the CNES also allows performance-adjusted ME (paME) value of diets to be calculated from observed DMI and growth or carcass measurements. Compared with other productivity measures (e.g., average daily gain and gain-to-feed ratio) that are confounded with and affected by DMI, the CNES logically separates production responses by cattle into two factors—DMI and ME of the diet. This enables research scientists or cattle producers to appraise responses within these two factors independently. In feeding studies, means of paME values were related closely to ME values of diets calculated from the ME of diet ingredients. But unlike ME values projected from diet analyses, paME estimates are affected by environmental conditions (e.g., season, weather, animal interactions, stress, nutritional history and deficiencies, associative effects of feeds, imprecise feed management, and animal healthfulness and disorders). These factors typically overestimate ME intake or increase energy requirements, both of which decrease energetic efficiency. By comparing paME with ME values calculated from diet composition, logical reasons behind performance responses to and quantitative benefits from feed additives, grain processing, hormone implants, and animal management can be appraised. Considering the evolution in cattle types, management and marketing conditions, and changes in diet ingredients and processing that have occurred during the past 50 yr, updating by a skilled committee to correct certain anomalies within the CNES as currently being applied seems appropriate. Developing simplified spreadsheets could help users evaluate their own dietary and management conditions and assure that the CNES continues to be widely applied by the feedlot industry within the United States and worldwide.
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Brizga, Janis, Sirpa Kurppa, and Hannele Heusala. "Environmental Impacts of Milking Cows in Latvia." Sustainability 13, no. 2 (January 15, 2021): 784. http://dx.doi.org/10.3390/su13020784.
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Increasing pressures surrounding efficiency and sustainability are key global drivers in dairy farm management strategies. However, for numerous resource-based, social, and economic reasons sustainable intensification strategies are herd-size dependent. In this study, we investigated the environmental impacts of Latvia’s dairy farms with different management practices. The herd size-dependent management groups varied from extensively managed small herds with 1–9 cows, extending to stepwise more intensively managed herds with 10–50, 51–100, 100–200, and over 200 milking cows. The aim is to compare the environmental impacts of different size-based production strategies on Latvia’s dairy farms. The results show that the gross greenhouse gas emissions differ by 29%: from 1.09 kg CO2 equivalents (CO2e) per kg of raw milk for the farms with 51–100 cows, down to 0.84 kg CO2e/kg milk for farms with more than 200 cows. However, the land use differs even more—the largest farms use 2.25 times less land per kg of milk than the smallest farms. Global warming potential, marine eutrophication, terrestrial acidification, and ecotoxicity were highest for the mid-sized farms. If current domestic, farm-based protein feeds were to be substituted with imported soy feed (one of the most popular high-protein feeds) the environmental impacts of Latvian dairy production would significantly increase, e.g., land use would increase by 18% and the global warming potential by 43%. Environmental policy approaches for steering the farms should consider the overall effects of operation size on environmental quality, in order to support the best practices for each farm type and steer systematic change in the country. The limitations of this study are linked to national data availability (e.g., national data on feed production, heifer breeding, differences among farms regards soil type, manure management, the proximity to marine or aquatic habitats) and methodological shortcomings (e.g., excluding emissions of carbon sequestration, the use of proxy allocation, and excluding social and biodiversity impacts in life-cycle assessment). Further research is needed to improve the data quality, the allocation method, and provide farm-size-specific information on outputs, heifer breeding, manure storage, and handling.
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SCHIERE, J. B., A. L. JOSHI, A. SEETHARAM, S. J. OOSTING, A. V. GOODCHILD, B. DEINUM, and H. VAN KEULEN. "GRAIN AND STRAW FOR WHOLE PLANT VALUE: IMPLICATIONS FOR CROP MANAGEMENT AND GENETIC IMPROVEMENT STRATEGIES." Experimental Agriculture 40, no. 3 (June 24, 2004): 277–94. http://dx.doi.org/10.1017/s0014479704001814.
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Straws and stovers are often called ‘by-products’ of grain production even though they are increasingly important, e.g. for animal feed, thatching, soil improvement, mushroom production and industrial use. As a result, plant breeders, agronomists, economists and animal nutritionists have to pay more attention than before to the total value of crops, i.e. whole plant value in which straws and grain both play a part. This paper reviews literature about the technical potential of breeding and/or management for more or better straw. It then discusses issues of the economic value (EV) and nutritional value (NV) of straw and stovers for livestock feed to guide research and development in cereal breeding and management. It is mainly based on experiences from the Indian subcontinent and semi-arid regions of the Near and Middle East. The paper shows that the quantity and quality of straw produced has changed considerably over recent decades as a result of breeding policies, new cultivation patterns and choice of cultivars. Both EV and NV depend on type of grain, animal production system and access to other feeds. A classification of these factors is provided and suggests that the EV of straw is particularly important in low-input systems with stovers from coarse grains.
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Patsios, Sotiris I., Anna Dedousi, Evangelia Ν. Sossidou, and Antonios Zdragas. "Sustainable Animal Feed Protein through the Cultivation of YARROWIA Lipolytica on Agro-Industrial Wastes and by-Products." Sustainability 12, no. 4 (February 14, 2020): 1398. http://dx.doi.org/10.3390/su12041398.
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Proteins are essential constituents of animal feeds, which comprise mainly vegetable protein (e.g., soybean meal), which is produced and transported globally. The decoupling of protein-production and livestock-growth areas results in protein deficiencies in certain parts of the world, and in significant environmental stress. Alternative, more sustainable protein feeds are necessary to meet the increasing needs, and to decrease the environmental footprint of animal products. Yeast Single Cell Proteins (SCP), produced locally using various agro-industrial by-product streams, have significant potential as alternative animal feed protein. Particularly, Yarrowia lipolytica, an oleaginous, non-pathogenic microorganism has been characterized as a “workhorse” in biotechnological studies, drawing the attention of many researchers. The present review summarizes available resources on critical issues concerning the applicability and commercialization of Yarrowia lipolytica as an environment-friendly protein source for animal feed. It discusses the sustainability of the yeast SCP production process, it presents the recent advances concerning Yarrowia lipolytica cultivation on low-cost agro-industrial by-products, and it stresses the effects on the health and welfare of productive animals due to the inclusion of Yarrowia lipolytica in their diet. The data presented in this study should facilitate relative research advancement and the commercialization of Yarrowia lipolytica’s use as an alternative protein source/supplement for animal feeds.
Dissertations / Theses on the topic "Feed management. eng"
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Castro, Cecília Silva de 1982. "Taxas e frequências de alimentação na produção de rã-touro em baias inundadas /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/96636.
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Orientador: Claudio Angelo AgostinhoBanca: Marta Verardino de Stéfani
Banca: Pedro de Magalhães Padilha
Resumo: Essa pesquisa teve por objetivo avaliar o efeito da frequência alimentar no desempenho produtivo da rã-touro (Lithobates catesbeianus) e determinar os coeficientes de disponibilidade de cálcio e fósforo e o coeficiente de digestibilidade da proteína da ração. Foram testadas três frequências de alimentação (6, 24 e 46 refeições/dia) em delineamento inteiramente casualizado com quatro repetições. Foram utilizadas rãs com peso médio de 70,59 ± 1,05 g, distribuídas em 12 baias de recria com piso alagado localizadas dentro de uma estufa. A ração foi fornecida por meio de alimentadores automáticos. Para determinação da digestibilidade da proteína e disponibilidade de cálcio e fósforo utilizou-se a sílica (SiO2) como marcador interno. O melhor crescimento foi observado com a maior frequência de alimentação aos 20, 40 e 60 dias. Ao final do experimento, as frequências de 6, 24 e 46 refeições/dia proporcionaram valores de conversão alimentar aparente de 2,31; 1,88 e 1,20, respectivamente. As diferentes frequências de alimentação não influenciaram na digestibilidade aparente da proteína e na disponibilidade aparente do cálcio e fósforo da ração fornecida para a rã-touro. Recomenda-se a alimentação de rã-touro em alta frequência (46 refeições/dia)
Abstract: This study aimed to evaluate the effect of feeding frequency in the productive performance of bullfrogs (Lithobates catesbeianus) and to determine the availability coefficients of calcium and phosphorous and the digestibility coefficient of protein contained in diet. Three feeding frequencies were tested (6, 24 and 46 meals/day) in a randomized completely design, with four repetitions. Bullfrogs were used with mean weight of 70.59 ± 1.05 g, distributed in 12 frog production stalls with flooded floor. The diet was supplied through automatic feeders. For determination of protein digestibility contained in diet and calcium and phosphorous availability used the silica (SiO2) as internal marker. The best growth was obtained using the largest feeding frequency during 20, 40 and 60 days. At the end of the experiment, the frequencies of 6, 24 and 46 meals/day provided values of apparent feed conversion ranged from 2.31; 1.88 and 1.20, respectively. The different feeding frequencies didn't influence in the apparent digestibility of the protein and about the apparent availability of calcium and phosphorous contained in diet supplied for the bullfrogs. It is recommended high feeding frequency (46 meals/day) for the bullfrogs
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Saita, Marcos Vinícius. "Parâmetros produtivos, fisiológicos e imunológicos de juvenis de pacu (Piaractus mesopotamicus) submetidos à restrição alimentar e estresse de manejo /." Jaboticabal : [s.n.], 2011. http://hdl.handle.net/11449/86745.
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Orientador: Elisabeth Criscuolo UrbinatiBanca: Leonardo Susumu Takahashi
Banca: Valéria Leão Souza
Resumo: Uma das estratégias estudadas para melhorar o manejo alimentar em peixes é a utilização da restrição da alimentação por tempo determinado para promover compensação do crescimento, durante a realimentação. Além disso, a redução na oferta de alimento é um manejo utilizado para evitar o desperdício de ração, redução da mão-de-obra, e principalmente manutenção da qualidade de água. Entretanto o efeito desse tipo de manejo deve ser mais conhecido para ser melhor explorado. Estre estudo avaliou a influência da restrição alimentar controlada no desempenho zootécnico, homeostase metabólica, fisiológica e imunológica em pacu (Piaractus mesopotamicus). Juvenis de pacu foram submetidos a quatro estratégias de alimentação (controle; duas semanas; três semanas e quatro semanas de restrição alimentar). Após o período de restrição, todos os tratamentos foram realimentados por duas semanas seguidas. Cada tratamento teve três repetições (viveiros com cerca de 40 m²), sendo utilizado um total de 12 tanques. Os peixes foram amostrados ao final de cada período de restrição (n=12 para cada tratamento) e ao final do período de realimentação de cada tratamento (n=12 para cada tratamento). A segunda fase experimental teve início ao final da amostragem da primeira fase (após a restrição de alimento), para avaliar a higidez dos peixes. Os peixes restantes foram capturados e submetidos ao manejo de transporte, após o qual foram novamente amostrados. em seguida à amostragem pós-transporte, os peixes foram distribuídos em caixas de 100 L, com aeração e renovação constante de água. Peixes de cada tratamento da primeira fase foram distribuídos em 12 caixas (seis peixes/caixa) onde permaneceram por 72 horas, de modo a simular um período de recuperação. Foram observadas diferenças significativas (p>0,05) nos parâmetros zootécnicos, metabólicos... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: A study of strategies to improve feeding management in fish is the use of restricted feeding for a while to promote compensatory growth during refeeding. Food restriction is a management used to avoid feed wastage, reduction of manpower, especially maintenance of water quality. However no one knows what the effects of this type of management on the animal performance, metabolic, physiological and immunological homeostasis of pacu. Juvenile pacu (Piaractus mesopotamicus) underwent four feeding strategies (control; two weeks; three weeks; and four weeks of food restriction). After the restriction period, all treatments were fed back for two weeks straight. Each treatment had three replicates (tanks with about 40 m²), used a total of 12 tanks. Fish were sampled at the end of each restriction period (n= 12 for each treatment) and the end of the refeeding from each treatment (n= 12 for each treatment). The second phase began at the end of sampling after refeeding, to assess fish health, captured animals were submitted to the management of transport, where they were sampled again. After the post-transport sampling, fish were distributed in polyethylene aquarium of 100 L with aeration and constant water flow. Fish per treatment of first stage were distributed in 12 boxes (six fish/aquarium) where they remained for 72 hours in order to simulate a recovery period. There were significant differences (p<0.05) in grow parameters, metabolic, hematologic and stress parameters. The feed restriction followed by refeeding resulted in total compensatory growth of juvenile pacu, and has proved an effective management, which should not affect the state of health of animals
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Takahashi, Leonardo Susumu. "Estratégia alimentar, teores de carboidratos dietéticos, desempenho e respostas fisiológicas do pacu Piaractus mesopotamicus /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/104932.
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Orientadora: Elisabeth Criscuolo UrbinatiBanca: José Eurico Possebom Cyrino
Banca: Ramon Diniz Malheiros
Banca: Aulus Cavalieri Carciofi
Banca: Roberto Goitein
Resumo: A adoção de esquemas de alimentação com restrição e realimentação para peixes pode induzir a ocorrência de ganho de peso compensatório e permite redução no fornecimento de ração, principal componente do custo de produção. Além disto, o uso de dietas que forneça os nutrientes necessários para esta fase de rápido crescimento e o não comprometimento da resistência imunológica do peixe, representam vantagens adicionais. Nesse sentido, juvenis de pacu Piaractus mesopotamicus (36,9 l 2,8 g) foram submetidos a três estratégias de alimentação (alimentação continua; 3 dias restrição e 3 dias de realimentação controlada; 3 dias restrição e 3 dias de realimentação até a saciedade aparente) com duas dietas experimentais (45 e 52% CHO). Foram avaliados o desempenho produtivo e metabolismo energético em duas etapas, aos 36 e aos 84 dias de alimentação. Após os 84 dias, os peixes foram submetidos à infestação pelo parasito Dolops carvalhoi, sendo avaliadas as respostas fisiológicas de estresse. Ocorreu ingestão compensatória, tanto durante os 36 como durante os 84 dias, mas sem ocorrência de ganho de peso compensatório. Os parâmetros do metabolismo energético, aos 36 dias de alimentação, sugerem grande capacidade do pacu em mobilizar as reservas energéticas endógenas. Aos 84 dias, os parâmetros fisiológicos do metabolismo energético, evidenciam a habilidade do pacu em manter a homeostase e recuperar-se da privação alimentar através da dinâmica de suas reservas. As estratégias de alimentação adotas associadas as dietas experimentais não comprometeram as respostas do pacu frente ao desafio com o ectoparasito. A adoção de períodos curtos de restrição e realimentação, pode ser recomendada em condições específicas de manejo, sem prejuízo irreversível aos peixes e com redução nos custos de produção.
Abstract: Schemes of food restriction and refeeding can induce compensatory growth in fish and reduction of production costs. Additionally, the use of diets providing needed nutrients for the fast growth and adequate immune status of fish can be beneficial. In this way, pacu juveniles Piaractus mesopotamicus (36.9 l 2.8 g) were submitted to three feed strategies (continuous feeding; 3 days of restriction and 3 days of controlled refeeding; 3 days of restriction and 3 days of refeeding until apparent satiation) and two experimental diets (45 and 52% carbohydrate - CHO). Growth performance and energetic metabolism were evaluated at 36 and 84 days of feeding. After 84 days, fish were exposed to Dolops carvalhoi, and physiological responses were evaluated. Compensatory food intake was registered at 36 and 84 days, without compensatory growth. At 36 days of feeding, metabolic indicators suggested that pacu is able to mobilize endogenous energy stores. At 84 days od food restriction, pacu exhibited ability to keep its body homeostasis by mobilizing endogenous reserves, and to recover the tissue losses provoked by food restriction. Feed strategies and experimental diets did not affect the ability of pacu to face the parasite infestation. Cycles of food restriction and refeeding for short periods (3 days restriction/3 days refeeding) can be recommended for pacu in specific conditions, since no irreversible biological damage was detected and, in addition, reduction of production cost is possible.
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Sousa, Rodrigo Morgado Ramalho de 1982. "Frequência alimentar para Tilápia do Nilo (Oreochromis niloticus) nas fases de reversão e pós-reversão sexual /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/104981.
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Orientador: Claudio Angelo AgostinhoBanca: Luiz Edivaldo Pezzato
Banca: Margarida Maria de Barros
Banca: Ricardo Pereira Ribeiro
Banca: Maria Célia Portella
Resumo: Este trabalho objetivou avaliar o efeito da baixa e da alta frequência de alimentação no desempenho produtivo de peixes alimentados com ração contendo ou não hormônio masculinizante no primeiro mês de vida. Foram alojadas 2,5 larvas L-1 em 24 hapas com 200 litros cada. O delineamento experimental foi inteiramente casualizado em arranjo fatorial 2X2 com seis repetições. Foram testadas duas frequências de alimentação (6 e 24 vezes) e ração com e sem hormônio. Houve interação entre frequência alimentar e o tipo de ração para as variáveis de peso final e taxa de reversão. As tilápias alimentadas com ração contendo hormônio e sem hormônio submetidas à frequência de 24 vezes ao dia apresentaram peso final de 0,82 e 0,65 g, respectivamente. Para os valores de conversão alimentar aparente houve diferença em função da frequência de alimentação, onde a frequência de 24 vezes apresentou melhor resultado. A taxa de sobrevivência não diferiu entre os tratamentos. Conclui-se que a maior frequência de alimentação aumenta a disponibilidade da ração durante o dia, reduz a competição pelo alimento, aumenta a uniformidade do lote e proporciona melhor desempenho das tilápias, possibilitando aumento da produtividade de 2,5 a 3,2 vezes
Abstract: The appropriate feeding is a basic premise for the sustainable development of fish farming. The use of 17-α-methyltestosterone increases tilapia performance, but it has been questioned and criticized. This study aimed to analyze the low and high feed frequency effect in fish performance with male hormone or hormone-free diet in the first month of life. Five thousand larvae were placed in 24 hapas with 200 liters each. (2.5 larvae L-1) The experiment was completely randomized 2X2 factorial design with six replicates. Two feeding frequencies (six and 24 times a day) and two diets with and without hormone were tested. There was interaction between feeding frequency and diets for final weight and sex reverse rate. Tilapias fed with hormone and hormone-free diet 24 times a day showed a final weight of 0.82 and 0.65g, respectively. There was significant effect of feeding frequency on apparent feed conversion and the best result was found for the frequency of 24 times a day. The survival rate was not different among treatments. It was concluded that the increase of feeding frequency increases the diet disponible during the day, reduces the food competition, diminishes pollution by excess of diet in the water, increases the lot homogeny and results in better tilapia performance, increasing the productivity 2.5 to 3.2 times more
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Kunii, Eduardo Miyamoto Fukanoki 1983. "Frequência alimentar e taxa de alimentação para Kinguio criado em hapa : desempenho produtivo e avaliação econômica /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/96503.
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Orientador: Claudio Angelo AgostinhoBanca: Margarida Maria Barros
Banca: Luiz Edivaldo Pezzato
Banca: João Batista Kochenborger Fernandes
Resumo: Com o trabalho, objetivou-se avaliar o desempenho do kinguio (Carassius auratus) em hapas providas com dispensadores automáticos de ração utilizando frequências alimentares de seis, 12 e 24 vezes ao dia e duas taxas de alimentação, 5% e 10% do peso vivo da biomassa, durante 75 dias. As hapas foram instaladas em tanques-rede submersos a um metro de profundidade em um viveiro escavado de 2.000m2. O delineamento experimental foi inteiramente casualizado em esquema fatorial com três frequências alimentares e duas taxas de alimentação. Cada tratamento teve três repetições e os peixes foram alimentados com ração comercial. Foram utilizadas 18 hapas de 0,42m³ onde foram distribuídos 75 peixes com peso médio inicial de 5,26± 1,52 gramas em cada unidade experimental. As frequências alimentares de seis, 12 e 24 vezes ao dia foram semelhantes com a taxa alimentar de 10% (P>0.05). Já com a taxa de 5% o desempenho produtivo foi superior naqueles alimentados de hora em hora em relação aos demais - P<0.05. Como esperado, observou-se maior ganho de peso nos kinguios submetidos à maior taxa de alimentação, apresentando o valor médio de 40,01 gramas, enquanto que na menor taxa o valor foi 32,07g. Em relação à frequência alimentar, os melhores resultados foram obtidos com maior parcelamento da ração. Com o fornecimento de ração de hora em hora o peso médio foi de 38,59g, quando os animais foram alimentados a cada duas horas apresentaram peso médio de 36,89g e quando receberam ração a cada quatro horas o peso médio de 33,75g. A conversão alimentar dos peixes que receberam 5% de seu peso em ração foi de 1,66, sendo que para os peixes que receberam 10% foi de 2,85. As conversões para os animais que foram alimentados a cada quatro horas, a cada duas horas e a cada hora foram 2,01; 2,32 e 2,44, respectivamente... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: In the present work the performance of kinguio (Carassius auratus) in hapas with automatic feeder, fed with 5% and 10% level of body weight in frequencies of six, 12 and 24 times a day was studied during 75 days. The hapas of 0.42 m³ was distributed in 18 cages submerged one meter depth in a water reservoir of 2.000m². There were used kinguio with 5.26 ± 1.52g in each experimental unit in a density of 75 fishes/m³. The experimental design used was a completely randomized whit three replicates in outline factorial three frequencies and two level, a commercial ration used. In 10% level the times frequency of six, 12 and 24 times a day were similar (P> 0.05). However the performance was higher with 5% level in those fed hourly over the other - P <0.05. As expected, the higher level of body weight provided greater weight gain in kinguios with the average value of 40.01g, whereas the lowest level the value was 32.07g. The best results were obtained with greater fragmentation of the ration in relation of food frequency. The supply of food in each hour, the average weight was 38.59g, when the animals were fed every two hours the mean weight 36.89g and when fed every four hours the average weight of 33.75g. Fishes that received 5% level of body weight the feed conversion were 1.66, while for the fishes receiving 10% were 2.85. For animals that were fed every four hours every two hours and each hour the feed conversions were 2.01, 2.32 and 2.44, respectively. The increase of frequency of food associated a lower level of body weight improved utilization of the ration resulting in better performance
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Books on the topic "Feed management. eng"
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Lipman, Frank. Spent: End exhaustion and feel great again. New York: Simon & Schuster, 2009.
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Young, Jeffrey E. Reinventing your life: The breakthrough program to end negative behavior ... and feel great again. New York: Plume, 1994.
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Mollie, Doyle, ed. Spent: The 6-week plan to end burnout and make you feel great again. New York: Simon & Schuster, 2008.
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Make Peace With Anyone: Breakthrough Strategies to Quickly End Any Conflict, Feud, or Estrangement. St. Martin's Press, 2002.
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Lieberman, David J. Make Peace With Anyone: Breakthrough Strategies to Quickly End Any Conflict, Feud, or Estrangement. St. Martin's Griffin, 2003.
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Make Peace with Anyone: Proven Strategies to End any Conflict, Feud, or Estrangement Now. Simon & Schuster Audio, 2002.
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Lieberman, David J. Make Peace with Anyone: Proven Strategies to End any Conflict, Feud, or Estragement Now. Simon & Schuster Audio, 2002.
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(Editor), Carlo Giupponi, Derek Karssenberg (Editor), Anthony Jakeman (Editor), and Matt P. Hare (Editor), eds. Sustainable Management of Water Resources: An Integrated Approach (The Fondazione Eni Enrico Mattei (Feem) Series on Economics, the Environment and Sustainable Development). Edward Elgar Publishing, 2006.
Find full textBook chapters on the topic "Feed management. eng"
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Coon, Craig N. "Major Feed Ingredients: Feed Management and Analysis." In Commercial Chicken Meat and Egg Production, 215–41. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0811-3_15.
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Ladwig, Theresa. "A Techno-Economic Comparison of Demand Side Management with Other Flexibility Options." In The Future European Energy System, 155–73. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-60914-6_9.
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AbstractThis chapter assesses the techno-economic characteristics of demand side management (DSM) in comparison with other flexibility options (e.g., energy storages) in order to estimate its flexibility and benefit for the system integration of renewable energy sources (RES). The results show that load shedding and load shifting are less flexible than other flexibility options and can therefore only balance short-term fluctuations. In contrast, load increase is more flexible and can integrate excess feed-in from RES also over longer periods. Analysis about the impact of DSM on other flexibility options show, that DSM lowers utilization and contribution margin of peak load plants and energy storages, while it increases both for baseload power plants. More electricity is consumed nationally due to DSM as it decreases imports and exports.
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Palm, Harry W., Ulrich Knaus, Samuel Appelbaum, Sebastian M. Strauch, and Benz Kotzen. "Coupled Aquaponics Systems." In Aquaponics Food Production Systems, 163–99. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_7.
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AbstractCoupled aquaponics is the archetype form of aquaponics. The technical complexity increases with the scale of production and required water treatment, e.g. filtration, UV light for microbial control, automatic controlled feeding, computerization and biosecurity. Upscaling is realized through multiunit systems that allow staggered fish production, parallel cultivation of different plants and application of several hydroponic subsystems. The main task of coupled aquaponics is the purification of aquaculture process water through integration of plants which add economic benefits when selecting suitable species like herbs, medicinal plants or ornamentals. Thus, coupled aquaponics with closed water recirculation systems has a particular role to fulfil.Under fully closed recirculation of nutrient enriched water, the symbiotic community of fish, plants and bacteria can result in higher yields compared with stand-alone fish production and/or plant cultivation. Fish and plant choices are highly diverse and only limited by water quality parameters, strongly influenced by fish feed, the plant cultivation area and component ratios that are often not ideal. Carps, tilapia and catfish are most commonly used, though more sensitive fish species and crayfish have been applied. Polyponics and additional fertilizers are methods to improve plant quality in the case of growth deficiencies, boosting plant production and increasing total yield.The main advantages of coupled aquaponics are in the most efficient use of resources such as feed for nutrient input, phosphorous, water and energy as well as in an increase of fish welfare. The multivariate system design approach allows coupled aquaponics to be installed in all geographic regions, from the high latitudes to arid and desert regions, with specific adaptation to the local environmental conditions. This chapter provides an overview of the historical development, general system design, upscaling, saline and brackish water systems, fish and plant choices as well as management issues of coupled aquaponics especially in Europe.
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"Biology, Management, and Conservation of Lampreys in North America." In Biology, Management, and Conservation of Lampreys in North America, edited by Margaret F. Docker. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874134.ch4.
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<em>Abstract</em>.—In most lamprey genera, “paired” species exist in which the larvae (which are microphagous filter feeders) are morphologically similar but the adults differ dramatically, becoming parasitic on teleost fishes or nonparasitic (i.e., do not feed at all) following metamorphosis. Parasitic lampreys feed for several months to several years (either in their natal stream or after migrating to larger fresh or marine water bodies) before embarking on a nontrophic upstream migration, sexual maturation, and spawning (followed by death); nonparasitic lampreys eliminate the parasitic phase, begin sexual maturation toward the end of metamorphosis, and spawn and die within 6–10 months of metamorphosis. In each species pair, the reduction in the length of postlarval life in nonparasitic lampreys is generally accompanied by an increase in the length of the larval period (and size at metamorphosis) so that the evolution of nonparasitism appears to have occurred without a change in the overall life span. Rather, nonparasitism appears to have evolved as a result of a change in the timing of metamorphosis relative to the timing of sexual maturation. Conspicuous morphological (e.g., adult body size, relative eye and oral disk size) and histological (e.g., lack of a functional digestive tract) differences distinguish nonparasitic adults from parasitic forms, and most lamprey taxonomists recognize life history type as a species-specific characteristic. However, plasticity of feeding type (e.g., facultative parasitism) has been observed in some lamprey populations, and molecular data on a number of paired species show no genetic differentiation between sympatric species pairs and suggest a polyphyletic origin for several nonparasitic species. This paper reviews the paired species concept, the repeated and independent evolution of nonparasitism in different genera and even within species, the evidence for facultative parasitism or facultative nonparasitism in some lamprey species, and the potential for hybridization between paired species and attempts to answer the question, are brook lampreys “real” species? The tentative answer is that there likely is not a single answer for all lamprey species pairs; different species pairs represent speciation at different stages. Some pairs appear to be distinct species according to both the biological and phylogenetic species concepts (i.e., they are reproductively isolated and show reciprocal monophyly), although each is not necessarily fixed for feeding type. In contrast, other pairs may represent incipient speciation and others yet may be experiencing ongoing gene flow. Parallels are therefore drawn between different lamprey species pairs and the divergent life history types found in other animal taxa (e.g., echinoderms and amphibians) and other temperate fish species (e.g., anadromous and freshwater-resident salmonids).
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Blobaum, Robert. "Wartime Crisis Management and Its Failure." In A Minor Apocalypse. Cornell University Press, 2017. http://dx.doi.org/10.7591/cornell/9781501705236.003.0004.
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This chapter looks at the Warsaw Citizens Committee, which emerged in August 1914 to assist in the basic provisioning of the city, finding work for the unemployed, assisting the families of military reservists called up to the Russian Army, and mobilizing financial resources to deal with the war's expected hardships. Those hardships, however, would be far greater than anticipated, leading to a rapid expansion of the committee's activities. Soon enough, the committee found itself involved in the organization of public kitchens, the sheltering of refugees, the setting of price controls, the monitoring of public health, and the protection of children. Eventually, with so many of Warsaw's inhabitants relying partially or completely on public support, escalating needs outstripped the city's financial resources. By the end of the war, a bankrupted city administration was unable to pay its own employees, let alone feed some two hundred thousand people in the public kitchens inherited from the Warsaw Citizens Committee.
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"Propagated Fish in Resource Management." In Propagated Fish in Resource Management, edited by BRIAN BRAZIL, BRIAN VINCI, and STEVE SUMMERFELT. American Fisheries Society, 2004. http://dx.doi.org/10.47886/9781888569698.ch52.
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<em>Abstract.</em>—Concerns for long-term water supply, public calls for environmental compatibility, potential pathogen contamination from influent and effluent waters, and increasingly restrictive water discharge regulations have led to the application of advanced water treatment technologies at various aquaculture facilities. As a result, novel management strategies and innovative facility designs have been developed for culturing fish in controlled or semicontrolled environments. However, questions surrounding the quality of the product obtained from such facilities suggest that greater attention should be given to end use requirements during the design, engineering, and operation of facilities culturing food fish or facilities culturing fish intended for wild release. The optimal “wild” fish that is to be produced for recovery or supplementation purposes is profoundly different than the optimal “domesticated” fish that is produced for food or for put-andtake stocking. Facility design considerations will be presented, which include the intended use of the fish and physical/chemical limitations of water sources. The various design and operating parameters that must be considered include differences in culture density, photoperiod, time to harvest/stocking, feed formulation, culture system scale and replications, tank surface properties, hydrodynamics, water quality, and physical/chemical limitations of water sources. However, assorted design parameters and culture conditions can be addressed with similar culture system unit processes. Finally, this paper will provide design examples of innovative fish culture strategies applying state-of-the-art technologies.
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Bahadur, Amar. "Nematodes Diseases of Fruits and Vegetables Crops in India." In Nematodes - Recent Advances, Management and New Perspectives [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98850.
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Nematodes are the most plentiful animals on earth, commonly found in soil or water, including oceans. Some species of nematodes are parasites of plants and animals. Plant-parasitic nematodes are non-segmented microscopic, eel-like round worms, obligate parasite possess stylets that live in soil causing damage to plants by feeding on roots or plant tissues. Plant-parasitic nematodes feed on roots, either within the root, some nematodes feed leaves. These nematodes cause breakdown of resistance to fungal diseases in fruit crops. Plant-parasitic nematodes living host tissue to feed on to grow and reproduce. Nematode life cycle consists of an egg, 4 pre-adult stages (juveniles) and an adult, life cycle depending on the species and the temperature. Nematodes do not move long distances (less than 6 inches per year). They are usually transported over long distances on machinery, in nursery stock, transplants, seeds, or by animals, moves soil, water and wind. They acquire nutrients from plant tissues by needle-like feeding structure (stylet/spear). Nematodes can be classified into three groups depending on feed on the plants such as ectoparasitic nematodes are always remaining outside the plant root tissues. Migratory endoparasitic nematodes move through root tissues sedentary endoparasitic nematodes penetrate young roots at or near the growing tip. They steal nutrients, disrupt water and mineral transport, and provide excellent sites for secondary pathogens (fungus and bactria) to invade the roots and decay. Several nematode species that cause problems in fruit orchards that are major limiting factors in fruit crop production cause extensive root necrosis resulting in serious economic losses. The root-knot nematode (Meloidogyne spp.), burrowing nematode (Radopholus similis) and citrus nematode (Tylenchulus semipentrans) are the major nematode pests that infect fruit crops. Parasitic nematodes that can damage tree fruit roots. Many kinds of nematodes have been reported in and around the roots of various fruit crops, only few are cause serious damage, including Root-knot nematodes (Meloidogyne spp.), Lesion nematodes (Pratylenchus species), Ring nematodes (Mesocriconema spp) are cigar-shaped that are strictly ectoparasitic, Dagger nematodes (Xiphinema spp) are relatively large ectoparasites that feed near root tips, Sting nematodes (Belonolaimus species) are ectoparasitic, Citrus nematodes (Tylenchulus semipenetrans) are sedentary semi-endoparasites. Nematodes reduce yield without the production of any noticeable above ground symptoms. Typical above ground symptoms of nematode infections stunting, yellowing and wilting. Major nematodes associated in large number of vegetables crops in India such as root-knot nematodes (Meloidogyne spp.), cyst nematodes (Heterodera spp.), lesion nematodes (Pratylenchus sp.), reniform nematodes (Rotylenchulus sp.) lance nematodes (Hoplolaimus spp.), stem and bulb nematode (Ditylenchus spp.) etc. Root-knot nematodes are important pests of vegetables belonging to solanaceous (brinjal, tomato, chili), cucurbitaceous (biter ground, cucumber, pumpkin, bottle gourd) leguminous (cowpea, bean, pea), cruciferous cauliflower, cabbage, broccoli, brussels, sprout), okra and several other root and bulb crops (onion, garlic, lettuce, celery, carrot, radish). Four species (M. incognita, M. javanica, M. arenaria and M. hapla) are more than 95% of the root-knot nematode population worldwide distribution. Stem and Bulb nematode (Ditylenchus spp.) commonly attacks onion, garlic, potato, pea and carrot etc. The nematodes spread from one area to another mainly through infested planting materials, water drains from infested areas into irrigation system, soil that adheres to implements, tyres of motor vehicles and shoes of plantation workers. Management recommendation through bio-pesticides, cultural practices, enrichment of FYM, Neem cake and other organic amendments.
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Costante, Elisa, Milan Petkovic, and Jerry den Hartog. "Trust Management and User’s Trust Perception in e-Business." In IT Policy and Ethics, 64–83. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2919-6.ch004.
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Trust is essential in the e-business world: to allow the cooperation needed in this setting, independent service providers have to trust each other and, also, end-users have to trust service providers. Trust Management, i.e. the process of establishing trust amongst the parties involved in a transaction, can be carried out using different approaches, methods and technologies. The end-user is an important party involved in this process. Trust Perception models attempt to understand the end-user’s point of view and the pattern he adopts to trust a service over the Internet. In this chapter the authors provide a state of the art for Trust Management in e-business. They review the most important Trust Management technologies and concepts including credentials and PKI, reputation, authorization and access control, trust policies, and trust languages. A conceptual map is presented clarifying the meaning and the links between different elements of a Trust Management system. Moreover, the authors discuss the end-user’s Trust Perception. The chapter presents a literature study on Trust Perception models and introduces the new model, able to list the trust signals the end-user considers to make trust decision. Examples of such signals can be the reputation of a website, the use of security protocols, the privacy policies adopted, and the look and feel of its user interface. Finally, the directions of future work are presented, and conclusions are drawn.
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Costante, Elisa, Milan Petkovic, and Jerry den Hartog. "Trust Management and User’s Trust Perception in e-Business." In Handbook of Research on E-Business Standards and Protocols, 321–41. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-0146-8.ch015.
Full textAbstract:
Trust is essential in the e-business world: to allow the cooperation needed in this setting, independent service providers have to trust each other and, also, end-users have to trust service providers. Trust Management, i.e. the process of establishing trust amongst the parties involved in a transaction, can be carried out using different approaches, methods and technologies. The end-user is an important party involved in this process. Trust Perception models attempt to understand the end-user’s point of view and the pattern he adopts to trust a service over the Internet. In this chapter the authors provide a state of the art for Trust Management in e-business. They review the most important Trust Management technologies and concepts including credentials and PKI, reputation, authorization and access control, trust policies, and trust languages. A conceptual map is presented clarifying the meaning and the links between different elements of a Trust Management system. Moreover, the authors discuss the end-user’s Trust Perception. The chapter presents a literature study on Trust Perception models and introduces the new model, able to list the trust signals the end-user considers to make trust decision. Examples of such signals can be the reputation of a website, the use of security protocols, the privacy policies adopted, and the look and feel of its user interface. Finally, the directions of future work are presented, and conclusions are drawn.
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Ravasan, Ahad Zare, and Saeed Rouhani. "An Expert System for Predicting ERP Post-Implementation Benefits Using Artificial Neural Network." In Operations and Service Management, 760–84. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3909-4.ch036.
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Implementing Enterprise Resource Planning systems (ERPs) is a complex and costly project which usually delivers only a few of expected benefits. Obtaining the expected benefits of ERPs is impressed by a variety of factors and variables which is related to an organization or project environment. In this paper, the idea of predicting ERP post-implementation benefits based on the organizational profiles and factors has been discussed. Regarding the need to form the expectations of organizations about ERP, an expert system is developed by using Artificial Neural Network (ANN) method to articulate the relationships between some organizational factors and ERP's achieved benefits. The expert system's role is in the preparation to capture the data from the new enterprises wishes to implement ERP and predict likely benefits might be achieved from the system. For this end, factors of organizational profiles (such as industry type, size, structure, and so on) are recognized and a feed-forward architecture and Levenberg-Marquardt (trainlm) neural network model is designed, trained and validated with 171 surveyed data of Middle-East located enterprises experienced ERP. The trained ANN embedded in developed expert system predicts with the average correlation coefficients of 0.745, which is respectively high and proves the idea of dependency of ERP post-implementation benefits on the organizational profiles. Besides, total correct classification rate of 0.701 shows good prediction power which can help firms in predicting ERP benefits before system implementation.
Conference papers on the topic "Feed management. eng"
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Kim, Tae Ho, and Luis San Andre´s. "Effect of Side Feed Pressurization on the Dynamic Performance of Gas Foil Bearings: A Model Anchored to Test Data." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50571.
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Comprehensive modeling of gas foil bearings (GFBs) anchored to reliable test data will enable the widespread usage of these bearings into novel high speed turbomachinery applications. GFBs often need a forced cooling gas flow, axially fed through one end of the bearing, for adequate thermal management. The paper presents rotordynamic response measurements on a rigid rotor supported on GFBs during rotor speed run-up and coastdown tests with the GFBs supplied with increasing feed gas pressures to 2.8 bar. Rotor speed run-up tests to 35 krpm show that bearing end side feed gas pressurization delays the onset speed of rotor subsynchronous whirl motions. The test data validate closely predictions of the threshold speed of instability and whirl frequency ratio derived from a GFB model that implements the axial evolution of gas circumferential flow velocity as a function of the imposed side feed pressure. Rotor speed coastdown tests from 25 krpm with a low feed pressure of 0.35 bar evidences a nearly linear synchronous rotor response for small and moderately large imbalance mass distributions. A structural FE rotordynamics model integrates linearized synchronous speed GFB force coefficients and predicts synchronous responses, amplitude and phase angle, agreeing with the test data. The analysis and measurements demonstrate the profound effect of end side, feed gas pressurization on the rotordynamic performance of GFBs.
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San Andre´s, Luis, and Tae Ho Kim. "Effect of Side Feed Pressurization on the Dynamic Performance of Gas Foil Bearings." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44047.
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Oil-free micro turbomachinery implementing gas foil bearings (GFBs) has improved mechanical efficiency and reliability. Adequate thermal management for operation in high temperature environments is an issue of importance in applications such as in gas turbines and turbochargers. GFBs often need a cooling gas flow, axially fed through one end of the bearing, to transport the heat conducted from a hot turbine, for example. Side gas pressurization, however, has a paramount effect on reducing amplitudes of motion, synchronous and subsynchronous. Presently, shaft motion measurements in a test rotor supported on GFBs show this remarkable effect. A computational gas film model implementing the evolution of gas circumferential flow velocity as a function of the imposed side pressure is advanced. Predicted direct stiffnesses and damping coefficients for the test GFB increase as the magnitude of feed pressure raises, while the difference in cross-coupled stiffnesses, directly related to rotor-bearing system stability, decreases. Predictions of threshold speed of instability and whirl frequency ratio are in close agreement with the measurements.
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Tozer, Michael, and Debra Tetteh-Wayoe. "Utilizing Value Management to Increase Project Competitiveness." In 2018 12th International Pipeline Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ipc2018-78230.
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With the current economic pressures being faced by the oil and gas sector, organizations are increasingly required to become more competitive on their capital projects. Enbridge has implemented the practice of Value Management (VM) to help achieve the needs and expectations of stakeholders with the least possible resources. VM is a systematic approach that is used by a multidisciplinary team to improve the value of a project (or aspects of a project) through the analysis of its functions, and is most effective when applied at the planning and development stages. A value study enables the expected performance (i.e. the desired functions) of a project to be clearly identified at the onset, and assesses a range of possible solutions/alternatives against the functions required by the owner. While VM is commonly used in the manufacturing industry, as well as on transportation and municipal projects, few examples of its application in the oil and gas sector were found. Enbridge researched a variety of VM best practices and created a framework that compliments existing company practices. This paper also highlights how the value methodology was recently applied to a capacity expansion project at the Front End Engineering and Design (FEED) stage. Our approach to the various elements of a value study will be discussed, including pre-workshop activities, the VM workshop, and post-workshop activities. Enbridge has seen significant benefits from the VM studies completed on projects to-date. Given the broad applicability of the value methodology, it is believed that our approach can also be successfully applied in other areas (e.g. improving business processes).
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Marques, Maria, Fabio Lopes, Ruben Costa, Carlos Agostinho, Pedro Oliveira, and Ricardo Jardim-Goncalves. "Innovative Product/Service for Personalized Health Management." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11711.
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Abstract Smart4Health project is a European project aiming to empower citizens with electronic health(care) record exchange, personal connected health services, and the ability of data donorship to the scientific community. The Smart4Health platform will enable citizens to manage, collect, store, access and share own health and healthcare data, at international level, through an easy-to-use, secure, constantly accessible and portable health data and services prototype within the EU and beyond. This shall also comprise self-quantified and citizen-generated data through IoT and wearables (e.g. smart watches, smart devices/textiles/shoes). Therefore, the citizen will not only be able to access data produced in the context of health systems, but become important contributor of health data more generally speaking. The information to be collected will feed the Smart4Health platform (4HealthPlatform – 4HP), enabling the Smart4Health user portal (4HealthNavigator – 4HN) services and applications to provide advanced personalised health services accessible whenever and wherever. In this paper we explore the work being developed for data integration coming from different smart devices aiming at enriching the citizen health and personal data as well as providing insight about citizen behaviour and support on how to modify/adapt postures and habits that may contribute for better health and wellbeing.
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Khan, Osama Hasan, Samad Ali, Mohamed Ahmed Elfeel, Shripad Biniwale, and Rashmin Dandekar. "Integrated Field Management System for LNG Assets: Maximizing Asset Value Through Representative End-To-End Modeling." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205969-ms.
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Abstract Effective asset-level decision-making relies on a sound understanding of the complex sub-components of the hydrocarbon production system, their interactions, along with an overarching evaluation of the asset's economic performance under different operational strategies. This is especially true for the LNG upstream production system, from the reservoir to the LNG export facility, due to the complex constraints imposed by the gas processing and liquefaction plant. The evolution of the production characteristics over the asset lifetime poses a challenge to the continued and efficient operation of the LNG facility. To ensure a competitive landed LNG cost for the customer, the economics of the production system must be optimized, particularly the liquefaction costs which form the bulk of the operating expenditure of the LNG supply chain. Forecasting and optimizing the production of natural gas liquids helps improve the asset economics. The risks due to demand uncertainty must also be assessed when comparing development alternatives. This paper describes the application of a comprehensive field management framework that can create an integrated virtual asset by coupling reservoir, wells, network, facilities, and economics models and provides an advisory system for efficient asset management. In continuation of previously published work (Khan, Ali, Elfeel, Biniwale, & Dandekar, 2020), this paper focuses on the integration of a steady-state process simulation model that provides high-fidelity thermo-physical property prediction to represent the gas treatment and LNG plant operation. This is accomplished through the Python-enabled extensibility and generic capability of the field management system. This is demonstrated on a complex LNG asset that is fed by sour gas of varying compositions from multiple reservoirs. An asset wide economics model is also incorporated in the integrated model to assess the economic performance and viability of competing strategies. The impact of changes to the wells and production network system on LNG plant operation is analyzed along with the long-term evolution of the inlet stream specifications. The end-to-end integration enables component tracking throughout the flowing system over time which is useful for contractual and environmental compliance. Integrated economics captures costs at all levels and enables the comparison of development alternatives. Flexible integration of the dedicated domain models reveals interactions that can be otherwise overlooked. The ability of the integrated field management system to allow the modeling of the sub-systems at the ‘right’ level of fidelity makes the solution versatile and adaptable. In addition, the integration of economics enables the maximization of total asset value by improving decision making.
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Hidayah, Nur Aeni, Eri Rustamaji, and Purusotama. "Determining User Satisfaction Factors on University Tuition Fee Systems Using End-User Computing Satisfaction (EUCS)." In 2018 6th International Conference on Cyber and IT Service Management (CITSM). IEEE, 2018. http://dx.doi.org/10.1109/citsm.2018.8674378.
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Jacobsen, Karina, David Tyrell, and Benjamin Perlman. "Impact Tests of Crash Energy Management Passenger Rail Cars: Analysis and Structural Measurements." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61252.
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Two full-scale impact tests were conducted to measure the crashworthiness performance of Crash Energy Management (CEM) passenger rail cars. On December 3, 2003 a single car impacted a fixed barrier at approximately 35 mph and on February 26, 2004, two-coupled passenger cars impacted a fixed barrier at approximately 29 mph. Coach cars retrofitted with CEM end structures, which are designed to crush in a controlled manner were used in the test. These test vehicles were instrumented with accelerometers, string potentiometers, and strain gages to measure the gross motions of each car body in three dimensions, the deformation of specific structural components, and the force-crush characteristic of the CEM end structure. Collision dynamics models were developed to predict the gross motions of the test vehicle. Crush estimates as a function of test speed were used to guide test conditions. This paper describes the results of the CEM single-car and two-car tests and provides results of the structural test. The single-car test demonstrated that the CEM design successfully prevented intrusion into the occupied volume, under similar conditions as the conventional test. During both CEM tests, the leading passenger car crushed approximately three feet, preserving the occupant compartment. In the two-car test, energy dissipation was transferred to the coupled interface, with crush totaling two feet between the two CEM end structures. The pushback of the couplers kept the cars in-line, limiting the vertical and lateral accelerations. In both the conventional tests there was intrusion into the occupant compartment. In the conventional two-car test sawtooth lateral buckling occurred at the coupled connection. Overall, the test results and model show close agreement of the gross motions. The measurements made from both tests demonstrate that the CEM design has improved crashworthiness performance over the conventional design.
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Dupuis, Bruce, and Jason Humber. "Pipeline Integrity: Establishing Data Management Value." In 2004 International Pipeline Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ipc2004-0246.
Full textAbstract:
For the majority of pipeline operators struggling to establish the business case for data management, records management, or geographic information systems, a step past the traditional information technology approach of return on investment (ROI) must be made. Traditional information technology value propositions are founded on information efficiencies that, for the most part, are extremely difficult to quantify since the processes are either not presently performed or the effort associated with the existing process has not been measured. Without a baseline of the existing process, a comparative analysis using improved efficiencies cannot be quantified to substantiate a return on investment. Justification of a data management system and its associated benefits in terms of its cost relative to the cost of the data it manages (e.g. ILI, excavation, CIS etc.) is compelling since it is only on the order of 2–10%, but typically even this metric is too general an argument for most pipeline integrity managers to feel comfortable defending. This paper will explore the process required to unearth the value of data management to support pipeline integrity. Many examples and cases will be discussed to back-up the approach to establishing value of data management for pipeline integrity.
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Chou, Y. Kevin, and Hui Song. "Thermal Modeling for Finish Hard Turning Using a New Tool." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41765.
Full textAbstract:
This study develops an analytical thermal model for temperature predictions in finish hard turning by a new tool. Tool life in finish hard turning is limited by part surface quality, e.g., white layer formations (microstructural alterations). Thermal damage due to temperature rise at machined surfaces is the primary source of such surface degradation. Thus, a thermal model capable of machined surface temperature predictions will enable part surface damage assessment as well as thermal management strategy for process optimization. A mechanistic model that accounts for nonuniform uncut chip thickness across the cutting edge is employed to estimate three-component machining forces. Machining forces and cutting characteristics, i.e., shear angle and chip-tool contact, approximate the heat intensity and geometry of shear plane and rake face heat sources. Due to tool nose radius, the two heat sources are three dimensional in nature and are further discretized into small segments, each treated as an individual rectangular heat source. Individual small heat-source segments are then used to study temperature rise in machining, using modified moving oblique heat source (shear plane) and modified moving and stationary heat sources (rake face) developed by Komanduri and Hou [1,2]. Temperature rise due to all small heat-source segments is superimposed, with proper coordinate transformation, to obtain final temperature distributions due to overall heat sources. The thermal model can be applied to study machining parameter effects on machining temperatures. It is indicated that maximum machined-surface temperatures are adversely affected by increasing feed rate and cutting speed, but favorably by increasing depth of cut. Tool rake face temperatures increase with cutting speed and feed rate as well. However, rake face temperatures decrease with increased depth of cut at high feed rates, but, reversely at low feed. The model has also been tested to evaluate white layer formations in finish hard turning. Tool nose radius effects have been analyzed and the results show that the smaller the tool nose radius, the deeper the white layer under identical machining conditions. Experimental results show good agreement with analytical predictions.
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Disher, Chris, and Larry Harthorn. "Mobile Marine Riser Inspection and Management Program." In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37134.
Full textAbstract:
The new R.A.D.A.R. (Riser Active Data Acquisition Recorder) program allows for full marine drilling riser inspection while the joints are stacked on the deck of the rig with no disassembly. With the utilization of ultrasonics, robotic tools have been developed to pass through the inside diameter of the main tube and auxiliary lines to obtain potentially thousands of pipe wall readings and to record the weld integrity of each weld. The tools are also capable of video recording the pipe interior. Trained inspectors complete the riser survey with dimensional, visual, and magnetic particle inspections on the end connections of the main tube and auxiliary lines. Inspection data is compiled and stored in a database and is added to previous inspections and will be utilized for trend analysis. Using statistical methods the inspection history can predict trends of riser life and the potential for future repairs. This will assist operators to predict riser repairs, out of service time, cost of repairs, and most importantly eliminate extremely costly rig down time. The RADAR program has successfully inspected over 110,00 feet of pipe since its inception in September 2001.
Reports on the topic "Feed management. eng"
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García-Mantilla, Daniel. PLAC Network Best Practices Series: Target-Income Design of Incentives, Benchmark Portfolios and Performance Metrics for Pension Funds. Inter-American Development Bank, June 2021. http://dx.doi.org/10.18235/0003599.
Full textAbstract:
In defined contribution systems, at the end of the accumulation phase the assets in the retirement account are exchanged for a pension. The conversion rate from assets to retirement income (which depends on the level of interest rates) is very volatile, and its variations constitute the main investment risk facing pension fund affiliates. In this sense, performance metrics, management fees and benchmark portfolios that focus on assets (and asset returns) and ignore the variations in the conversion rate, embed several problems: i. they send wrong signals to regulators, fund managers and workers, ii. they provide wrong incentives to pension fund management companies, and iii. they leave pension fund affiliates exposed to their largest risk factor, even during the last few years preceding their retirement date. We find that regulatory incentives with these fundamental problems are ubiquitous in the region. The document presents a series of best practices, and delivers a practical set of tools to assist regulators and supervisors in designing a framework that improves security and sufficiency of retirement income, and provides relevant and timely information to pension fund affiliates. The framework achieves that by fostering an integration of the accumulation and the payout phases, and an alignment of the regulatory incentives for pension fund management companies with the retirement income objectives of pension fund affiliates. Using historical data from Colombia as a case study, the document illustrates and quantifies the improvements in terms of pension benefits and retirement income security that the proposed framework could bring.