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Search Results: 1 - 10 of 17 matches for " Annicchiarico "
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Una metodología para la optimización estructural de formas usando principios de evolución flexible distribuida
Annicchiarico,W;
Boletín Técnico , 2007,
Abstract: recently, evolutionary algorithms (ea) have been used extensively due to its robustness, efficiency and efficacy to found the optimal or quasi-optimal solution of structural shape optimization problems. among its pros: they don?t require specialized information in order to obtain the searched optimum and they don?t use a sensitivity analysis during its process. all this makes ea a good candidate to solve optimization problems in general. but, its disadvantages, such as lack of diversity in the population during its evolution process and its expensive running time due to higher number of evaluations, have attracted the attention of the scientific community in order to overcome these drawbacks. the objective of this article is to propose a flexible distributed genetic algorithm in order to optimize the structural shape of models analyzed by finite or boundary elements methods and modelled with geometric design elements. the distributed character of the implementation and its flexibility, when dealing with design variables and parameters, allow the algorithm to overcome the above mentioned limitations. finally, a numerical example is presented and discussed in order to show the ability of the proposed approach to optimize this kind of problems.
Una metodología para la optimización estructural de formas usando principios de evolución flexible distribuida A structural shape optimization approach using flexible distributed evolution principles
W Annicchiarico
Boletín Técnico , 2007,
Abstract: Recientemente, los Algoritmos Evolutivos (AE) se han usado extensivamente para encontrar soluciones casi-óptimas u óptimas al problema de optimización estructural de formas debido a su robustez, eficiencia y eficacia. Entre sus ventajas se encuentra el hecho de no requerir información especializada para obtener el óptimo buscado además de no necesitar de un análisis de sensibilidades durante este proceso. Todas estas ventajas hacen a AE un buen candidato para resolver problemas de optimización en general, sin embargo algunas de sus desventajas, tales como la carencia de diversidad en la población durante el proceso de evolución y su excesivo tiempo de cálculo debido al gran número de funciones de evaluación, han llamado la atención de la comunidad especializada a fin de solventar estos inconvenientes. En este sentido, el objetivo de este artículo es proponer una metodología de optimización basada en un Algoritmo Genético Distribuido de carácter flexible que permita la optimización estructural de la forma de modelos de elementos finitos o elementos de contorno modelados con elementos de dise o geométrico. El carácter distribuido y el manejo flexible de las variables y parámetros permiten al algoritmo solventar los inconvenientes antes mencionados. Finalmente, un ejemplo numérico es presentado y discutido a fin de mostrar la habilidad de la metodología propuesta para optimizar este tipo de problemas. Recently, Evolutionary Algorithms (EA) have been used extensively due to its robustness, efficiency and efficacy to found the optimal or quasi-optimal solution of structural shape optimization problems. Among its pros: they don’t require specialized information in order to obtain the searched optimum and they don’t use a sensitivity analysis during its process. All this makes EA a good candidate to solve optimization problems in general. But, its disadvantages, such as lack of diversity in the population during its evolution process and its expensive running time due to higher number of evaluations, have attracted the attention of the scientific community in order to overcome these drawbacks. The objective of this article is to propose a Flexible Distributed Genetic Algorithm in order to optimize the structural shape of models analyzed by finite or boundary elements methods and modelled with geometric design elements. The distributed character of the implementation and its flexibility, when dealing with design variables and parameters, allow the algorithm to overcome the above mentioned limitations. Finally, a numerical example is presented and discussed in o
Psicobiología de la homosexualidad masculina: hallazgos recientes
ANNICCHIARICO,IVáN;
Universitas Psychologica , 2009,
Abstract: in this paper, empirical and theoretical reports which question the causes of male homosexuality are examined. according to these reports, male homosexuality differs from female homosexuality in some respects. additionally, evidence favouring the consideration of male homosexuality as a biological condition is shown: there are brain differences between gay men and heterosexual men, there are genetic and perinatal factors associated to male homosexuality, there are cognitive and behavioral differences between gay and heterosexual men, there are animal models for studying homosexuality; finally, there are negative findings concerning the psychosocial factors associated to male homosexuality.
Breve rassegna delle actività dell'Aisc e sullo stato della catalanistica in Italia
Annamaria Annicchiarico,Giuseppe Grilli
Llengua & Literatura , 1998, DOI: 10.2436/l&l.vi.1355
Abstract:
Effect of Manure vs. Fertilizer Inputs on Productivity of Forage Crop Models
Giovanni Annicchiarico,Giovanni Caternolo,Emanuela Rossi,Pasquale Martiniello
International Journal of Environmental Research and Public Health , 2011, DOI: 10.3390/ijerph8061893
Abstract: Manure produced by livestock activity is a dangerous product capable of causing serious environmental pollution. Agronomic management practices on the use of manure may transform the target from a waste to a resource product. Experiments performed on comparison of manure with standard chemical fertilizers (CF) were studied under a double cropping per year regime (alfalfa, model I; Italian ryegrass-corn, model II; barley-seed sorghum, model III; and horse-bean-silage sorghum, model IV). The total amount of manure applied in the annual forage crops of the model II, III and IV was 158, 140 and 80 m 3 ha ?1, respectively. The manure applied to soil by broadcast and injection procedure provides an amount of nitrogen equal to that supplied by CF. The effect of manure applications on animal feeding production and biochemical soil characteristics was related to the models. The weather condition and manures and CF showed small interaction among treatments. The number of MFU ha ?1 of biomass crop gross product produced in autumn and spring sowing models under manure applications was 11,769, 20,525, 11,342, 21,397 in models I through IV, respectively. The reduction of MFU ha ?1 under CF ranges from 10.7% to 13.2% those of the manure models. The effect of manure on organic carbon and total nitrogen of topsoil, compared to model I, stressed the parameters as CF whose amount was higher in models II and III than model IV. In term of percentage the organic carbon and total nitrogen of model I and treatment with manure was reduced by about 18.5 and 21.9% in model II and model III and 8.8 and 6.3% in model IV, respectively. Manure management may substitute CF without reducing gross production and sustainability of cropping systems, thus allowing the opportunity to recycle the waste product for animal forage feeding.
Microscopic colitis
Gianluca Ianiro,Giovanni Cammarota,Luca Valerio,Brigida Eleonora Annicchiarico
World Journal of Gastroenterology , 2012, DOI: 10.3748/wjg.v18.i43.6206
Abstract: Microscopic colitis may be defined as a clinical syndrome, of unknown etiology, consisting of chronic watery diarrhea, with no alterations in the large bowel at the endoscopic and radiologic evaluation. Therefore, a definitive diagnosis is only possible by histological analysis. The epidemiological impact of this disease has become increasingly clear in the last years, with most data coming from Western countries. Microscopic colitis includes two histological subtypes [collagenous colitis (CC) and lymphocytic colitis (LC)] with no differences in clinical presentation and management. Collagenous colitis is characterized by a thickening of the subepithelial collagen layer that is absent in LC. The main feature of LC is an increase of the density of intra-epithelial lymphocytes in the surface epithelium. A number of pathogenetic theories have been proposed over the years, involving the role of luminal agents, autoimmunity, eosinophils, genetics (human leukocyte antigen), biliary acids, infections, alterations of pericryptal fibroblasts, and drug intake; drugs like ticlopidine, carbamazepine or ranitidine are especially associated with the development of LC, while CC is more frequently linked to cimetidine, non-steroidal antiinflammatory drugs and lansoprazole. Microscopic colitis typically presents as chronic or intermittent watery diarrhea, that may be accompanied by symptoms such as abdominal pain, weight loss and incontinence. Recent evidence has added new pharmacological options for the treatment of microscopic colitis: the role of steroidal therapy, especially oral budesonide, has gained relevance, as well as immunosuppressive agents such as azathioprine and 6-mercaptopurine. The use of anti-tumor necrosis factor-α agents, infliximab and adalimumab, constitutes a new, interesting tool for the treatment of microscopic colitis, but larger, adequately designed studies are needed to confirm existing data.
Effects of housing conditions on the welfare of lactating ewes
G. Annicchiarico,M. Caroprese,A. Muscio,C. Perilli
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2007.1s.535
Abstract:
Indoor climate and cheese making properties of ewe milk
M. Albenzio,G. Annicchiarico,L. Schena,R. Marino
Italian Journal of Animal Science , 2011, DOI: 10.4081/ijas.2003.s1.569
Abstract: In the last decades, many studies have focused on the impact of management practices and environmental factors on the welfare and production performance of farmed animals. Some experiments have investigated the effects of micro-environment parameters on ewe udder health and milk quality. In dairy sheep housing, a ventilation rate of 66 m3/ewe per hour has been proved to sustain adequately the welfare and performance of ewes during the summer season (Sevi et al., 2002). A minimum ventilation rate of 30m3/animal/h has been recommended for housed sheep in winter (Chiumenti, 1987)...
Effect of dietary protein level on ewe milk yield and on air quality under different ventilation rates
M. Albenzio,G. Annicchiarico,A. Santillo,A. Muscio
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2005.2s.339
Abstract: The efficiency of dietary N utilization for milk protein synthesis in dairy animals is quite low (15 to 35%) (NRC, 1988; Tamminga, 1992), therefore farmers are driven to use high protein level diets for sustaining milk production in lactating animals. Previous experiments have demonstrated that an increase in the protein level of diet from 13 to 16% resulted in higher blood urea concentrations (Jaime and Purroy, 1995) and increased N excretion in urine in sheep (Gonzalez et al., 1984).
Stress-induced changes in immune response of dairy ewes
Mariangela Caroprese,Giovanni Annicchiarico,Giovanni Caternolo,Antonella Santillo
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2009.s2.607
Abstract: two groups of 16 Comisana ewes were selected from a group of 30, and divided, according to their cortisol secretion after isolation in a novel environment, into HC ewes, having a cortisol secretion >90 ng/mL, and LC ewes having a cortisol secretion <80 ng/mL. Blood samples were collected immediately before and immediately after isolation, and 60, 120, 300min and then 24h and 48h after isolation, to evaluate the percentage of lymphocyte T-helper (CD4+) and lymphocyte T-cytotoxic (CD8+) by flow cytometry analysis, and IL-1β and IL-6 concentrations by ELISA. The day before the isolation test, the ewes were milked in the afternoon at 1500h (-19h from isolation), and then milked for the three days starting from the day of the isolation test (at 0, 5, 24, 29, 48 and 53h from isolation) to evaluate milk cortisol secretion, and IL-1β and IL-6 concentrations. Results suggest that the levels of cortisol secretions can influence the immune competence of dairy ewes and cytokines concentrations. Milk cytokine concentrations, and not milk cortisol concentrations, can be considered indicators of the magnitude of the hypothalamic-pituitary-adrenal axis activation.
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