1,466 research outputs found

    Conservation laws, classical symmetries and exact solutions of the generalized KdV-Burgers-Kuramoto equation

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    For a generalized KdV-Burgers-Kuramoto equation we have studied conservation laws by using the multiplier method, and investigated its first-level and second level potential systems. Furthermore, the Lie point symmetries of the equation and the Lie point symmetries associated with the conserved vectors are determined. We obtain travellingwave reductions depending on the form of an arbitrary function. We present some explicit solutions: soliton solutions, kinks and antikinks

    Computational tool to foster systematic thinking and sustainable environmental conscience in the selection of energy sources systems in agrifood companies

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    The agrifood sector is mainly composed by small and medium enterprises (SMEs). The large majority of these companies does not have the resources, either financial or human, to develop or use with tailored computational systems aimed to improve the organizational management of the company. There are undeniable advantages of the extended use of real-time software systems like Enterprise Resources Management (ERP) or Customer Relationship Management (CRM) devoted to practices, strategies and technologies in the integrated management and interaction between all sectors of companies. However, these SMEs have limited resources to implement and use the abovementioned solutions, which in turns may reflect on the competitiveness. This paper describes an easy and expedite computational tool to help the decision-making concerning the selection of energy sources systems in agrifood companies. The tool provides an overview of types of energy sources used in specific agrifood sectors, as well as their major sources of pollution. Several scenarios (balance between energy costs and greenhouse gas emissions) are predicted to help decision-making on these topics. These scenarios results are compared with the average results of the specific agrifood sector. The results are also provided graphically to help an easy and expedite analysis. The use of this tool aims to foster systematic thinking and sustainable environmental conscience, promoting the energy efficiency and consequently improving the competitiveness by reducing one of today’s largest fixed costs of companies: energy consumption. Additionally, this tool also provides a prediction of the greenhouse gas emissions, to help a more sustainable and responsible commitment with the environment. The main goal of this tool is to provide the opportunity to perform individualized analysis of scenarios of energy-sources mix leading to the improvement of the performance of companies, and implementing a new thinking of continuous improvement, in order to increase competitiveness.+AGRO - Organizational qualification, energy and health and safety in the work of the agrifood industryinfo:eu-repo/semantics/publishedVersio

    Cysticidal Therapy: Impact On Seizure Control In Epilepsy Associated With Neurocysticercosis

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    Objective: To evaluate the clinical features and seizure control of epilepsy related to neurocysticercosis. Method: 18 patients with partial epilepsy and neurocysticercosis were treated with albendazol or praziquantel and followed from 3 months to 12 years. We analyzed results from the CSF exam, interietal electroencephalogram (EEG), head computerized tomography and/or magnetic resonance imaging. Results: The patients' mean age was 36.4 years. The mean duration of epilepsy was 16 years. 83% patients had simple partial seizures ; 17% had complex partial seizures. All patients underwent routine EEGs: 62% had abnormalities and 38% were normal. A relationship was observed between focal EEG abnormality and the location of cyst in 28% of the patients. The CSF exams showed pleocytosis in 33% of the patients, and 28% had elevated protein levels. Only 22% of patients had positive titer for cysticercosis in the CSF. In all patients who had somatosensory and special sensory seizures there was a relationship between location of the cysts and seizure semiology (n=11). After cysticidal therapy, 83% patients had a significant improvement in controlling seizures. Conclusion: In this group, we found a predominance of simple partial seizures and a relationship between somatosensory and special sensory seizures and the location of the cysts. Cysticidal therapy was effective in controlling seizures in these patients and should be considered for patients with partial seizures and semiology related to cyst location.58410141020Carpio, A., Escobar, A., Hauser, W.A., Cysticercosis and epilepsy: A critical review (1998) Epilepsia, 39, pp. 1025-1040Pal, D.K., Carpio, A., Sander, J.W., Neurocysticercosis and epilepsy in developing countries (2000) J Neurol Neurosurg Psychiatry, 68, pp. 137-143Del Brutto, O.H., Prognostic factors for seizure recurrence after withdrawal of antiepileptic drugs in patients with neurocysticercosis (1994) Neurology, 44, pp. 1706-1709Spina-França, A., Livramento, J.A., Machado, L.R., Cysticercosis of the central nervous system and cerebrospinal fluid: Immunodiagnosis of 1573 patients in 63 years (1993) Arq Neuropsiquiatr, 51, pp. 16-20Monteiro, L., Nunes, B., Mendonça, D., Lopes, J., Spectrum of epilepsy in neurocysticercosis: A long-term follow-up of 143 patients (1995) Acta Neurol Scand, 92, pp. 33-40Carpio, A., Santillán, F., León, P., Aspectos clinicos de la cisticercosis (1990) Rev Inst Cienc Salud (Ecuador), 5, pp. 1-40Palacio, L.G., Jiménez, I., Garcia, H.H., Neurocysticercosis in persons with epilepsy in Medellín, Colombia (1998) Epilepsia, 39, pp. 1334-1339Garcia, H.H., Gilman, R., Martinéz, M., Cysticercosis as a major cause of epilepsy in Peru (1993) Lancet, 341, pp. 197-200Medina, M.T., Rosas, E., Rubio-Donnadieu, F., Sotelo, J., Neurocysticercosis as the main cause of late-onset epilepsy in Mexico (1990) Arch Intern Med, 150, pp. 323-325Sotelo, J., Escobedo, F., Rodriguez-Carbajal, J., Rubio-Donnadieu, F., Therapy of parenchymal brain cysticercosis with praziquantel (1984) N Engl J Med., 310, pp. 1001-1007Shawhney, I.M.S., Lekhra, O.P., Shashi, J.S., Evaluation of epilepsy management in a developing country: A prospective study of 407 patients (1996) Acta Neurol Scand, 94, pp. 19-23Proposal for revised classification of epilepsies and epileptic seizures (1989) Epilepsia, 30, pp. 389-399Takayanagui, O.M., Jardim, E., Therapy for neurocysticercosis: Comparison between albendazole and praziquantel (1992) Arch Neurol, 49, pp. 290-294Carpio, A., Santillán, F., León, P., Is the course of neurocysticercosis modified by treatment with antibelminthic agents? (1995) Arch Intern Med, 155, pp. 1982-1988Kramer, L.D., Medical Treatment of cysticercosis-ineffective (1995) Arch Neurol, 52, pp. 101-102Hachinski, V., Medical treatment of cysticercosis (1995) Arch Neurol, 52, p. 104Krammer, L.D., Locke, G.E., Byrd, S.E., Daryabagi, J., Cerebral cysticercosis: Documentation of natural history with CT (1989) Radiology, 171, pp. 459-462Cukiert, A., Pugli, P., Scapolan, H.B., Congruence of the topography of intracranial calcifications and epileptic foci (1994) Arq Neuropsiquiatr, 52, pp. 289-294Escobedo, F., Penagos, P., Rodríguez, J., Sotelo, J., Albendazole therapy for neurocysticercosis (1987) Arch Intern Med, 147, pp. 738-741Murthy, J.M.K., Reddy, Y.V.S., Prognosis of epilepsy associated with single CT enhancing lesion: A long term follow up study (1998) J Neurol Sci, 159, pp. 151-155Bittencourt, P., Adamolekum, B., Bharucha, N., Epilepsy in the tropics: II. Clinical presentations, pathophysiology, immunologic diagnosis, economics and therapy (1996) Epilepsia, 37, pp. 1121-1127Del Brutto, O.H., Santibañez, R., Noboa, C.A., Epilepsy due to neurocysticercosis: Analysis of 203 patients (1992) Neurology, 42, pp. 389-392Narata, A.P., Arruda, W.O., Uemura, E., Neurocisticercose: Diagnósfico tomográfico em pacientes neurológicos (1998) Arq Neuropsiquiatr, 56 (2), pp. 245-249Minguetti, G., Ferreira, M., Computed tomography in neurocysticercosis (1983) J Neurol Neurossurg Psychiatry, 46, pp. 926-942Chequer, R.S., Vieira, V.L., Neurocisticercose no Estado do Espírito Santo (1990) Arq Neuropsiquiatr, 48, pp. 431-440Daras, M., Tuchman, A.J., Strobos, R.J., Computed tomography in adult onset epileptic seizures in a city hospital population (1987) Epilepsia, 28, pp. 519-522Singh, G., Neurocysticercosis in South-Central America and the Indian Subcontinent: A comparative evaluation (1997) Arq Neuropsiquiatr, 55, pp. 349-356Sethi, P.K., Kuar, B.R., Madan, V.S., Appearing and disappearing CT scan abnormalities and seizures (1985) J Neurol Neurossurg Psychiatry, 48, pp. 866-869Chandy, M.J., Rajshekhar, V., Ghosh, S., Single small enhancing CT lesions in Indian patients with epilepsy: Clinical, radiological and pathological considerations (1991) J Neurol Neurossurg Psychiatry, 54, pp. 702-705Rajsheklar, V., Albendazole theraphy for persistent solitary cysticercus granuloma in patient with seizures (1993) Neurology, 43, pp. 1238-1240Vazquez, V., Sotelo, J., The course of seizures after treatment for cerebral cysticercosis (1992) N Engl J Med, 327, pp. 696-701Alarcón, F., Escalante, L., Dueñas, G., Neurocysticercosis: Short course of treatment with albendazole (1989) Arch Neurol, 46, pp. 1231-123

    Environmental heterogeneity caused by anthropogenic disturbance drives forest structure and dynamics in Brazilian Atlantic Forest

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    We evaluated how tree community floristic composition, forest structure and dynamics varied over a period of 13 years across a topographic gradient of ravines created by anthropic disturbance in Brazilian Atlantic Forest. The study area is located within a fragment of Atlantic Forest (21° 09' S, 44° 54' W), in Minas Gerais state, Brazil. This work was based on data of tree diameter at 1.3 m from the soil, collected in four inventories. Each individual was recorded as being in one of three stratified topographic classes: hilltop, slope and bottom. We used direct gradient analysis to evaluate floristic compositional changes, phytosociological analysis to evaluate structural variations, and assessed demographic and biomass changes over time through analysis of rates of forest dynamics. The results did not reflect modifications in the patterns of floristic composition and species diversity along the topographic gradient, while differences in forest structural attributes and dynamics may be detected at these smaller spatial scales. Thus, the same species group may employ different strategies against different restrictive environmental factors. Finally, we suggest that floristic composition and species diversity may be less sensitive parameters for post-disturbance responses than forest dynamics and structure

    Anuran Species Of The Salto Morato Nature Reserve In Paraná, Southern Brazil: Review Of The Species List

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    We provide an updated checklist of the anurans of the Salto Morato Nature Reserve (SMNR), Paraná, southern Brazil, including information on species endemism, conservation status, habitat use, and reproductive modes. We sampled the study area between February 2013 and July 2015, using Visual Encounter Surveys, totaling 700 hours of sampling effort. We supplement our primary data with secondary data (published papers and voucher specimens), and through these, we found a total of 54 anuran species representing 23 genera and 10 families. All the frogs recorded are endemic to the Atlantic Forest. Although no species has been listed as Endangered on the Red Lists of Paraná state, Brazil, and the IUCN, five are classified as Data Deficient. Most of the species recorded were arboreal (55.5%), a third were terrestrial (33.3%), and the remainders were rheophilic (11.1%). We identified 18 different reproductive modes, with types 1 (lay eggs in lentic water where the tadpoles develop) and 23 (direct development of terrestrial eggs) being the most common. Our findings indicate that the SMNR currently has the greatest diversity of anuran species and reproductive modes of any area in southern Brazil. © 2016 Check List and Authors.12

    Precipitation reaction in alpha-Cu-Al-Ag alloys

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    The Ag-rich precipitates formation reaction in the Cu-9.22%at. Al-4.66%at. Ag, Cu-9.31%at. Al-5.83%at. Ag and Cu-9.37%at. Al-7.08%at. Ag alloys was studied using microhardness change measurements with temperature and time, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The results indicated that the Ag-rich phase formation is an interface controlled process with a zero-order mechanism, due to the amount of unsolved Ag that makes the precipitation reaction rate independent of Ag concentration.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)UNIFESP Departamento de Ciências Exatas e da TerraUNESP Instituto de Química Departamento de Físico-QuímicaUNIFESP, Depto. de Ciências Exatas e da TerraSciEL

    Heat stress and ACTH administration on cortisol and insulin-like growth factor I (IGF-I) levels in lactating Holstein cows

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    Physiological and productive responses were studied in five Holstein cows in thermal comfort (T1), stress by exogenous adrenocorticotropic hormone (ACTH) administration (T2) and heat stress (T3) to compare acute and punctual stress (ACTH) and prolonged stress (heat stress). During T1 and T2, cows were housed in a climatic-free stall barn. In T3, the animals were kept in a climatic room (air temperature of 37°C from 08:00 to 13:00 h, and of 26°C from 14:00 to 07:00 h) for 7 days. Milk yield, rectal temperature (RT), respiratory rate (RR) and blood samples were obtained before, during and after all treatments. In T1 at 08:00 h, RT and RR were below the upper critical limit. Simultaneously, cortisol and insulin growth-factor I (IGF-I) were within the normal limits. After ACTH administration (T2), cortisol significantly increased, reaching maximum levels at 60 min and returning to basal levels at 300 min. However, IGF-I was not affected. During T3, Holstein cows did not effectively dissipate their body temperature and RT, RR and cortisol significantly increased. There was a 26.6% reduction in milk production after heat stress (P < .05). Prolonged heat stress was more stressful and cows had higher levels of CORT in T3 than in T2 even before the increase in body temperature. Although the total amount of cortisol and IGF-I presented a negative and significant Pearson correlation (r = −0.79), IGF-I was not significantly influenced by heat stress or ACTH administration, and the relationship between IGF-I and heat stress remains controversial

    Síndrome De Transfusão Feto-fetal: Neurodesenvolvimento De Lactentes Tratados Com Cirurgia A Laser

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    To assess the neurodevelopmental functions of survivors of twin-twin transfusion syndrome (TTTS) treated by fetoscopic laser coagulation (FLC), during the first year of life, comparing them to a control group; and to verify the influence of specific variables on neurodevelopment. Method: This was a prospective, longitudinal study. The sample comprised 33 monochorionic diamniotic twins who underwent FLC for treatment of TTTS and 22 full-term infants of single-fetus pregnancies. Bayley Scales of Infant and Toddler Development Screening Test were used for evaluation. Prenatal, perinatal and postnatal information were obtained. Results: There was an increased frequency of infants in the TTTS group with inadequate performance compared to the control group. The identified variables (fetal donor, low economic income and cardiorespiratory disease) negatively impacted expressive communication and fine motor skills. Conclusion: Although through follow-up is recommended in all TTTS survivors, particular attention is required for the high-risk group as defined in this study. © 2016, Associacao Arquivos de Neuro-Psiquiatria. All rights reserved.74430731

    OCUPAÇÕES DE ENCOSTAS E IMPACTOS SOCIOAMBIENTAIS URBANOS NAS VILAS BANDEIRANTES I, II E III, LOCALIZADAS NOS BAIRROS PORTO DO CENTRO, SATÉLITE E SAM API, EM TERESINA (PI)

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    Nas últimas décadas o homem passou a ser um dos principais agentes modeladores do relevo urbano. Como agente produtor ou intensificador da paisagem ele a transforma e interfere nos processos naturais de esculturação do relevo. O objetivo é analisar impactos ambientais decorrentes das ocupações de encostas das Vilas Bandeirantes I, II e III em Teresina, Piauí. Resultados demonstram que esta ocupação levou à formação de sulcos e voçorocas e na presença de diferentes tipos de depósitos tecnógenos
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