Non-Perturbatively Improved Quenched Hadron Spectroscopy

We make a quenched lattice simulation of hadron spectroscopy at beta=6.2 with the Wilson action non-perturbatively improved. With respect to the unimproved case, the estimate of the lattice spacing is less influenced by the choice of input hadron masses. We study also the effects of using an improved quark mass in the fits to the dependence of hadron masses upon quark masses.Comment: 12 pages, including 5 postscript figure

Application of the O(N)O(N)-Hyperspherical Harmonics to the Study of the Continuum Limits of One-Dimensional σ\sigma-Models and to the Generation of High-Temperature Expansions in Higher Dimensions

In this talk we present the exact solution of the most general one-dimensional $O(N)$-invariant spin model taking values in the sphere $S^{N-1}$, with nearest-neighbour interactions, and we discuss the possible continuum limits. All these results are obtained using a high-temperature expansion in terms of hyperspherical harmonics. Applications in higher dimensions of the same technique are then discussed.Comment: 59208 bytes uuencoded gzip'ed (expands to 135067 bytes Postscript); 4 pages including all figures; contribution to Lattice '9

Using Microalgae for Converting Solar Energy into Biofuels and other Bio-products

It is consensual that current patterns of energy consumption and usage are unsustainable in the medium to long term, as mankind still has an overwhelming dependence on fossil fuels. Various renewable energy systems are being studied, developed and implemented, with the main goals of reducing the dependence on fossil fuels, decreasing the environmental impacts, increasing energy supply and security, among other purposes.N/

Death ideation in cancer patients: contributing factors

Advances in cancer research and therapy have improved prognosis and the quality of life of many patients. However, previous epidemiological studies in oncologic patients have shown an increased risk of suicide. Suicidal thoughts, relatively well known in those terminally ill, may be just as important for cancer patients who are survivors or are living with the disease. Nonetheless, there is a relative paucity of data about suicidality in this setting. The authors conducted a prospective observational study to identify death thoughts and to explore the factors associated with suicidal ideation in cancer patients. A sample of 130 patients referred for psychiatric consultation was obtained following informed consent and authorization from the local ethics committee. A semistructured interview assessed sociodemographic data, psychosocial support, and information regarding the cancer process and its treatment. Psychometric instruments were used to evaluate psychopathology, namely the Hospital Anxiety and Depression Scale, the Beck Hopelessness Scale, and the Beck Scale for Suicide Ideation. Psychiatric diagnoses were obtained through the application of the Mini International Neuropsychiatric Interview. Death ideation was identified in 34.6% of patients, yet only 10% had active suicidal thoughts. Risk of suicide was associated with female gender, a psychiatric diagnosis (major depressive disorder, panic disorder, or dysthymia), difficult interpersonal relationships, associated pain, high hopelessness, and depressive and anxiety symptoms. Although suicidal thoughts are frequent in cancer patients at different stages of disease, most are transitory. Risk factors for suicidal ideation have been identified, such as depression, hopelessness, uncontrolled pain, and difficult interpersonal relationships. Further assessment is necessary to identify those at higher risk of attempting suicide, and underlying psychiatric disorders should be vigorously treated

Potencial de rochas silicáticas no fornecimento de nutrientes para milheto. 1. Macronutrientes.

Realizaram-se experimentos com o objetivo de avaliar o efeito residual de diferentes doses e fontes de potássio no acúmulo de macronutrientes na parte aérea do milheto. Foram implantados dois ensaios em casa de vegetação na Embrapa Semi-Árido, em Petrolina-PE: um em Argissolo Acinzentado, de rextura arenosa, e outro em Vertissolo, de textura argilosa. As variáveis em estudo foram três fontes de K (Biotita-Xisto, Brecha Piroclástica e Cloreto de Potássio comercial), três doses de K2O (50, 100 e 150 mg dm-3) e quatro tratamentos adicionais (testemunha absoluta, testemunha mais demais nutrientes, 50 mg dm-3 de K2O nas formas de Biotita-Xisto e de Brecha Piroclástica). Cada ensaio constituiu-se de um fatorial (3 x 3) + 4, disposto no delineamento inteiramente casualizado, com quatro repetições. As unidades experimentais consistiram de vasos plásticos com 3 dm3 de solo. Todas as unidades experimentais, com exceção dos tratamentos testemunha absoluta e adicionais com as duas rochas teste, receberam uma adubação básica e uniforme com macro e micronutrientes, definida em função dos resultados de análise de solo. No Argissolo Acinzentado, ambas as rochas silicáticas proporcionaram baixas quantidades de K e dos demais nutrientes às plantas de milheto. A biotita-xista forneceu maior conteúdo de S às plantas. No Vertissolo, as rochas silicáticas não foram eficientes no fornecimento de nutrientes ao milheto

Aspectos biológicos de Spodoptera frugiperda (Lepidoptera: Noctuidae) alimentados de Brachiaria ruziziensis.

Resumo

Potencial de rochas silicáticas no fornecimento de nutrientes para milheto. 2. Micronutrientes.

Realizaram-se experimentos com o objetivo de avaliar o efeito residual de diferentes doses e fontes de potássio no acúmulo de micronutrientes na parte aérea do milheto. Foram implantados dois ensaios em casa de vegetação na Embrapa Semi-Árido, em Petrolina-PE: um em Argissolo Acinzentado, de textura arenosa/média, e outro em vertissolo, de textura argilosa. As variáveis em estudo foram três fontes de K (Biotita-Xisto, Brecha Piroclástica e Cloreto de Potássio comercial), três doses de K2O (50, 100 e 150 mg dm-3) e quatro tratamentos adicionais (testemunha absoluta, testemuha mais demais nutrientes, 50 mg dm-3 de K2O nas formas de Biotita-Xisto e de Brecha Piroclástica). Cada ensaio constituiu-se de um fatorial (3 x 3) + 4, disposto no delineamento inteiramente casualizado, com quatro repetições. As unidades experimentais consistiram de vasos plásticos com 3 dm3 de solo. Todas as unidades experimentais, com exceção dos tratamentos testemunha absoluta e adicionais com as duas rochas teste, receberam uma adubação básica e uniforme com macro e micronutrientes, definida em função dos resultados da análise de solo. A aplicação das rochas silicáticas e do cloreto de potássio não afetou o conteúdo de micronutrientes na parte aérea do milheto em ambos os ensaios