Music classification by transductive learning using bipartite heterogeneous networks

The popularization of music distribution in electronic format has increased the amount of music with incomplete metadata. The incompleteness of data can hamper some important tasks, such as music and artist recommendation. In this scenario, transductive classification can be used to classify the whole dataset considering just few labeled instances. Usually transductive classification is performed through label propagation, in which data are represented as networks and the examples propagate their labels through\ud their connections. Similarity-based networks are usually applied to model data as network. However, this kind of representation requires the definition of parameters, which significantly affect the classification accuracy, and presentes a high cost due to the computation of similarities among all dataset instances. In contrast, bipartite heterogeneous networks have appeared as an alternative to similarity-based networks in text mining applications. In these networks, the words are connected to the documents which they occur. Thus, there is no parameter or additional costs to generate such networks. In this paper, we propose the use of the bipartite network representation to perform transductive classification of music, using a bag-of-frames approach to describe music signals. We demonstrate that the proposed approach outperforms other music classification approaches when few labeled instances are available.Sao Paulo Research Foundation (FAPESP) (grants 2011/12823-6, 2012/50714-7, 2013/26151-5, and 2014/08996-0

Produção de biomassa de guandu (Cajanus cajan L.) e milho (Zea mays L.) para silagem em função de sistemas mecanizados de preparo do solo

Mechanical soil management has a huge impact on early plant development and can promote effects at all stages of the silage forage production cycle. Thus, this work was conducted to verify if a mechanized system of soil preparation influences the accumulation of pigeon pea and corn biomass. The experiment was conducted at the farm school of Federal University of Mato Grosso do Sul, Faculty of Veterinary Medicine and Animal Science. The experimental delimitation chosen was randomized blocks, the treatments were two systems of tillage (conventional and reduced), associated to two crops (Cajanus cajan L., cv. BRS Mandarim e Zea mays L. hybrid TG Status). The cv. BRS Mandarim in conventional tillage system impacted higher biomass values. In addition, the same soil preparation system promoted oscillations between the crops (P<0.05), where cv. BRS Mandarim showed biomass values 7% higher than cv. Status TG. In reduced handling system, the crops presented the same biomass productivity. Despite the increase of dry weight during the cycle of cv. BRS Mandarim biomass production, there was a reduction in the dry matter fraction, indicating that the specific weight per plant decreased at the end of the evaluation period. The tillage system that was fulfilled conventionally promoted higher estimates of pigeon pea biomass. Corn was not influenced by mechanized tillage system.La gestión mecánica del suelo afecta al desarrollo inicial de las plantas y puede promover efectos en todas las fases del ciclo de producción de forraje para ensilado. Por lo tanto, este trabajo se llevó a cabo para verificar si el sistema de preparación del suelo mecanizado influye en la acumulación de biomasa de guandu y maíz. El experimento se llevó a cabo en la granja escolar de la Universidad Federal de Mato Grosso do Sul, de la Facultad de Medicina Veterinaria y Ciencias Animales. El diseño experimental utilizado fue bloques aleatorizados, los tratamientos son dos sistemas de preparación del suelo (convencionales y reducidos), asociados con dos cultivos (Cajanus cajan L., cv BRS Mandarin y Zea mays L. hybrid TG Status). cv. BRS Mandarin en el sistema de preparación del suelo realizado convencionalmente impactó mayores valores de biomasa. Además, el mismo sistema de preparación del suelo promovió oscilaciones entre cultivos (P<0.05), en los que cv.  BRS Mandarin presentó valores de biomasa 7% más altos que cv. Status TG. En el sistema de gestión reducido, los cultivos presentaron el mismo rendimiento de biomasa. A pesar del aumento del peso seco durante el ciclo de producción de biomasa de cv. BRS Mandarin hubo una reducción en la fracción de materia seca, lo que indica que el peso específico por planta se redujo al final del ciclo de evaluación. El sistema de preparación del suelo realizó convencionalmente mayores estimaciones de biomasa de guandu. El maíz no fue influenciado por el sistema mecanizado de preparación del sueloOs manejos mecânicos do solo impactam no desenvolvimento inicial das plantas podendo promover efeitos em todas as fases do ciclo de produção de forragem para silagem. Assim, este trabalho foi conduzido para verificar se o sistema mecanizado de preparo do solo influência no acúmulo de biomassa de guandu e milho. O experimento foi conduzido na fazenda escola da Universidade Federal do Mato Grosso do Sul, da Faculdade de Medicina Veterinária e Zootecnia. O delineamento experimental empregado foi de blocos ao acaso, os tratamentos são dois sistemas de preparo do solo (convencional e reduzido), associados a duas culturas (Cajanus cajan L., cv BRS Mandarim e Zea mays L. híbrido TG Status). A cv. BRS Mandarim no sistema de preparo do solo realizado de forma convencional impactou em maiores valores de biomassa. Além disso, o mesmo sistema de preparo do solo promoveu oscilações entre as culturas (P<0,05), em que a cv.  BRS Mandarim apresentou valores de biomassa 7% superiores ao da cv. Status TG. No sistema de manejo reduzido, as culturas apresentaram a mesma produtividade de biomassa. Apesar do aumento do peso seco durante o ciclo de produção de biomassa da cv. BRS Mandarim ocorreu redução na fração de matéria seca, indicando que o peso especifico por planta reduziu ao final do ciclo de avaliação. O sistema de preparo do solo realizado de forma convencional promoveu maiores estimativas de biomassa de guandu. O milho não foi influenciado pelo sistema mecanizado de preparo de solo.

INFLUÊNCIA DE SISTEMAS DE PREPARO NA MANUTENÇÃO DA PALHADA E RESISTÊNCIA DO SOLO À PENETRAÇÃO

O preparo do solo favorece o desenvolvimento do sistema radicular e cria condições adequadas para o desenvolvimento das plantas. Todavia, o intenso uso de máquinas e implementos pode afetar a resistência do solo à penetração (RP) e a manutenção da cobertura vegetal morta na superfície do solo. O objetivo deste trabalho foi avaliar a influência dos sistemas de preparo convencional e reduzido sobre a RP e a cobertura vegetal morta em um Latossolo vermelho de textura muito argilosa, em condições de baixa umidade, além de comparar três métodos na estimativa da palhada. A RP foi avaliada por meio do uso de um penetrômetro de impacto modelo IAA/Planalsucar – Stolf na profundidade de 0,0-0,6m e a cobertura vegetal morta por meio da captura e análise de imagens. Houve diferença significativa entre os tratamentos nas profundidades de 0,15-0,20 m, 0,45-0,50 m e 0,50-0,55 m do solo. Ambos os sistemas de preparo fizeram com que o solo apresentasse de baixa a muito alta RP nas profundidades avaliadas. Verificou-se que os métodos para estimar a cobertura morta do solo não diferiram significativamente entre si e que, no momento anterior ao preparo, havia mais de 91% do solo coberto com palhada. Após as operações mecanizadas, houve maior redução de palha quando foi empregado o sistema de preparo convencional

Use of crushing residue as nutrients source in the cocoa seedlings development in Medicilândia – PA

The use of milled rocks has been postulated as an efficient way to provide nutrients to the plants. The objective of this work was to evaluate the cocoa seedlings agronomic performance in different Diabase Penatecaua powder treatments. The study comprehends the following phases: i) involved waste characterization, ii) treatments definition and sampling; iii) monitoring and evaluation; iv) systematization and results discussion. The experiment was realized with cocoa seedlings germinated in commercial organic substrate in the period from July to September 2019. The used rock dust was extracted at Km 85, Transamazônica highway, Medicilândia municipality – Pa. The extraction area lithology is formed by igneous rocks of Diabase Penatecaua. The experimental delineation was entirely randomized, with four repetitions per treatment, being them respectively in the dosages 0, 25, 50 and 75 (g / plant), being 16 plants per block, totaling 64 plants, and their irrigation done manually in the first hours of the day. Therefore, the results showed that the dosages were absorbed by the cocoa seedlings according to the plant\u27s need allied to pH balance, which was caused by good nutritional cycling with the organic matter high rate present in the commercial substrate when in contact with the Diabase Penatecaua powder worked granulometry. However, the experiment time wasn’t enough to obtain statistically a significant difference. Thus, it is necessary that new studies be done aiming the temporal deepening of the studied doses for the culture

Leucine and Its Importance for Cell Signalling Pathways in Cancer Cachexia-Induced Muscle Wasting

The anabolic effects of a supplemented diet with branched-chain amino acids, especially leucine, on skeletal muscle wasting and as a co-adjuvant in cancer treatment have been well-studied. Leucine is a precursor of protein synthesis and acts as a nutritional signal, affecting multiple metabolic processes (e.g., satiety, thermogenesis, energy efficiency, and body composition). Previous studies related to nutritional therapy have mainly focused on myopenia, which is the loss of skeletal muscle mass in some pathologies, including cancer. Leucine plays a role in the maintenance and even increase of lean body mass in healthy individuals as well as the prevention of disease states that culminate in myopenia. Herein, we review the available data addressing the mechanisms by which leucine acts as a cellular signal, thereby stimulating muscle protein synthesis, leading to the inhibition of muscle catabolism, especially in an experimental model of cancer cachexia. We also show differences found in the metabolomic and proteomic analyses, including the use of leucine in maternal diets as a preventative for muscle wasting as supported by our experimental data

Evaluation and data analysis of user experience for the Doctrina system: a skilled tutor

Gamification is a growing concept and very popular mainly with young audiences. In the education context its application allows not only ex-tra motivation by the student, but also a capacity for greater abstraction to more complex concepts. The purpose of this work is to present, through a software, de-veloped specifically for mobile devices, a gamified environment for the teaching-learning process. The software will work in a personalized way for each student through the intelligent tutor system, based on bio-inspired algorithms, aligned with reinforcement learning practices and hierarchy graph structures. A syste-matic analysis of system usability system was performed through globally known heuristics. Finally, the user responses were analyzed with the objective of dis-covering patterns for system improvement