Interaction Effects on the Magneto-optical Response of Magnetoplasmonic Dimers

The effect that dipole-dipole interactions have on the magneto-optical (MO) properties of magnetoplasmonic dimers is theoretically studied. The specific plasmonic versus magnetoplasmonic nature of the dimer's metallic components and their specific location within the dimer plays a crucial role on the determination of these properties. We find that it is possible to generate an induced MO activity in a purely plasmonic component, even larger than that of the MO one, therefore dominating the overall MO spectral dependence of the system. Adequate stacking of these components may allow obtaining, for specific spectral regions, larger MO activities in systems with reduced amount of MO metal and therefore with lower optical losses. Theoretical results are contrasted and confirmed with experiments for selected structures

Comparação entre protocolos de extração de DNA para Amphobotrys ricini.

bitstream/CNPA/19683/1/COMTEC239.pd

Morfogênese do capim-elefante adubado com composto orgânico proveniente de resíduos sólidos de pequenos ruminantes.

This study evaluated the biomass flow of irrigated Pennisetum purpureum cv. Cameroon fertilized with different levels of organic compost made from waste derived from production and slaughter of sheep and goat farming. The experiment was conducted in a cut and carry of elephant grass for four 60 day-cycles..

Avaliação nutricional do capim-elefante fertilizado com composto orgânico oriundo de resíduos da produção e abate de caprinos e ovinos?.

Resumo: Objetivou-se avaliar a composição química do capim-elefante adubado com crescentes doses de composto orgânico produzido a partir de resíduos da produção e abate de pequenos ruminantes. O delineamento foi em blocos casualizados com 6 tratamentos e 4 blocos, totalizando 24 parcelas, sendo aplicadas as seguintes doses (t ha-1): zero; 13,3; 26,6; 39,9; 53,2 e 79,8. Para a diagnose do estado nutricional do capim-elefante, coletou-se 7 amostras simples por parcela, em zigue-zague, de maneira aleatória. A região avaliada foi a primeira folha recém-expandida, sendo as amostras simples as plantas de uma mesma touceira, ao sexagésimo dia após o corte de uniformização. Avaliou-se a análise de macro e micronutrientes do capim-elefante. Houve efeito significativo para os macronutrientes primários nitrogênio, fósforo e potássio (NPK) e o micronutriente zinco. Conclui-se que a aplicação, na capineira, do composto orgânico proveniente de resíduos da produção e abate de pequenos ruminantes proporciona incremento nos teores foliares de N, P, K e Zn. [Evaluation of elephant grass fertilized with compound organic derived of production and slaugher of sheeps and goats]. Abstract: This study aimed to evaluate the nutritional status of elephant grass under doses of organic compound from production residue and slaughter of small ruminants after composting process. The experimental design was randomized blocks with 6 treatments and 4 blocks, total of 24 plots. The doses (t ha-1) applied were: zero; 13.3; 26.6; 39.9; 53.2 and 79.8. In order to diagnose the nutritional status of elephant grass we collected 40 single samples in random way in each plot. The chosen part was the first newly expanded leaf, and the single samples were plants of the same clump on the sixtieth day after the uniformity cut. We evaluated the chemical analysis of macronutrients and micronutrients in elephant grass. The results showed that there were significant effects on primary macronutrients nitrogen, phosphorus and potassium (NPK) and zinc micronutrient. The results show that the application of organic compound from production residue and slaughter of small ruminants provided an increase in the leaf levels of N, P, K and Zn

Comportamento ingestivo de ovinos alimentados com rações contendo quatro níveis de inclusão do farelo de mamona.

Este trabalho foi desenvolvido com o objetivo de observar a influência de quatro níveis de substituição (0; 50; 75 ou 100%) do farelo de soja pelo farelo de mamona destoxificado em rações para ovinos mestiços ½ Morada Nova x ½ SPRD (sem padrão racial definido) sobre o seu comportamento ingestivo. O delineamento utilizado foi o inteiramente casualizado com quatro tratamentos e cinco repetições. Os ovinos eram machos, inteiros, com peso corporal 18,01 ± 1,41 kg e idade média de 7 meses. Foram avaliadas atividades contínuas (tempo de alimentação, ruminação, outras atividades e ócio) e pontuais (consumo de sal, ingestão de água, micção e defecação), como também a eficiência de alimentação (EAL), eficiência de ruminação (ERU), tempo de alimentação (TAL), tempo de ruminação (TRU), tempo de mastigação total (TMT), número de bolos ruminais (BOL), tempo de mastigações merícicas por bolo ruminal (MMtb ) e número de mastigações merícicas por bolo ruminal (MMnb ). As variáveis tempo de alimentação, ruminação, outras atividades, ócio, consumo de sal e ingestão de água foram afetadas (P<0,05), especialmente o MMnb , que foi inferior para os animais alimentados com as rações com 100% de substituição, possivelmente pelo seu menor teor de fibra (oriundo da forragem), sendo possível a substituição total do farelo de soja pelo farelo de mamona destoxificado. Ingestive behavior of sheep fed diets containing four levels of castor meal. Abstract - The aim of this work was to evaluate the effect of the replacement of four levels of a soybean meal by detoxified castor meal in rations fed to seven month-old ½ Morada Nova x ½ WDB (without defined breed) crossbred lambs, average 18 kg BW, on their ingestive behavior. The experiment was conducted in a completely randomized design with four treatments and five replicates. Continuous (feeding time, rumination, other activities and idleness) and punctual (salt consumption, water ingestion, urination and defecation) activities, as well as eating efficiency, rumination efficiency, eating time, rumination time, total chewing time, number of ruminal bolus, time of jaw movements per ruminal bolus and number of jaw movements per ruminal bolus were evaluated. The variables feeding time, rumination, other activities, idleness, salt consumption and water ingestion were influenced (P<0.05) by the replacement, especially the number of jaw movements per ruminal bolus, which was lower for animals fed diets with 100% replacement, possibly due to its lower fiber content. The results showed that it is possible the total replacement of the soybean meal by detoxified castor meal

Skin lesion detection and classification using convolutional neural network for deep feature extraction and support vector machine

Pigmented skin lesion identification is essential for detecting harmful pathologies related to this large organ, especially cancer. An analysis of the different methods and projects developed to diagnose these illnesses throughout the years showed that they had become very useful tools to identify melanoma, dermatofibroma, and basal cell carcinoma, among other types of cancer, are seen through the use of new computer-aided technologies. The most common diagnosis is based on dermoscopy and the dermatologist expertise that can improve accuracy with image detection techniques and classification by computer. Therefore, this study aims to develop software models able to detect and classify skin cancer. The following work is based on the use of dermoscopy images obtained from the HAM10000 dataset, a database with 10000 images previously tested and validated for research use. The main process is divided into three relevant parts: image segmentation, feature extraction (FE) using ten different pre-trained Convolutional Neural Networks (CNNs), and Support Vector Machine (SVM) to establish a classification model. According to the results, the models of classification performed very well using the image segmentation step, showing average accuracies between 80.67% (Xception) and 90% (Alexnet). In contrast to the process without using image segmentation, where no method reached 60%. AlexNet plus SVM model showed the minor running time and presented the higher accuracy rate (90.34%) for the correct identification and classification of the seven categories of cutaneous lesions taken into account

Stellar population models based on the SDSS-IV MaStar library of stellar spectra. I. Intermediate-age/old models

We use the first release of the SDSS/MaStar stellar library comprising ~9000, high S/N spectra, to calculate integrated spectra of stellar population models. The models extend over the wavelength range 0.36-1.03 micron and share the same spectral resolution (R~1800) and flux calibration as the SDSS-IV/MaNGA galaxy data. The parameter space covered by the stellar spectra collected thus far allows the calculation of models with ages and chemical composition in the range t>200 Myr, -2 <=[Z/H]<= + 0.35, which will be extended as MaStar proceeds. Notably, the models include spectra for dwarf Main Sequence stars close to the core H-burning limit, as well as spectra for cold, metal-rich giants. Both stellar types are crucial for modelling lambda>0.7 micron absorption spectra. Moreover, a better parameter coverage at low metallicity allows the calculation of models as young as 500 Myr and the full account of the Blue Horizontal Branch phase of old populations. We present models adopting two independent sets of stellar parameters (T_eff, logg, [Z/H]). In a novel approach, their reliability is tested 'on the fly' using the stellar population models themselves. We perform tests with Milky Way and Magellanic Clouds globular clusters, finding that the new models recover their ages and metallicities remarkably well, with systematics as low as a few per cent for homogeneous calibration sets. We also fit a MaNGA galaxy spectrum, finding residuals of the order of a few per cent comparable to the state-of-art models, but now over a wider wavelength range.Comment: 37 pages, 31 figures, MNRAS in press, models available at http://www.icg.port.ac.uk/masta

Características estruturais do capim-elefante adubado com composto orgânico proveniente da produção e do abate de pequenos ruminantes.

This study aimed to evaluate the morphophysiological characteristics of irrigated Pennisetum purpureum cv. Cameroon subjected to doses of an organic compost from waste generated by production and slaughter of small ruminants..