Dynamical symmetries and the Ermakov invariant

Ermakov systems possessing Noether point symmetry are identified among the Ermakov systems that derive from a Lagrangian formalism and, the Ermakov invariant is shown to result from an associated symmetry of dynamical character. The Ermakov invariant and the associated Noether invariant, are sufficient to reduce these systems to quadratures

O marketing esportivo: diferenças e semelhanças entre futebol e voleibol

TCC (Graduação) - Universidade Federal de Santa Catarina. Centro de Desportos. Curso de Graduação em Educação Física.Os clubes brasileiros começaram a olhar o marketing esportivo com outros olhos no inicio do século XX, principalmente no futebol para competir com os altos salários pagos por clubes europeus. Já no voleibol o marketing foi utilizado para atrair investidores para a criação de equipes, pois até então o investimento no esporte era pequeno. Esse foi dois exemplos de como o marketing pode ajudar as equipes desportivas na arrecadação de capital para o investimento no esporte. O objetivo desse estudo foi analisar as semelhanças e diferenças entre o marketing esportivo entre equipes profissionais de futebol e voleibol, sendo utilizada como metodologia uma pesquisa básica de abordagem qualitativa. Foram realizadas entrevistas semi-estruturadas com a amostra na qual se pode constatar que os dois esportes apresentam em seus departamentos de marketing diferenças e similaridades que ocorrem para suas equipes se adaptarem ao mercado e adquirirem novos patrocinadores

On the generalized Hamiltonian structure of 3D dynamical systems

The Poisson structures for 3D systems possessing one constant of motion can always be constructed from the solution of a linear PDE. When two constants of the motion are available the problem reduces to a quadrature and the structure functions include an arbitrary function of them

Comment on "A note on the construction of the Ermakov-Lewis invariant"

We show that the basic results on the paper referred in the title [J. Phys. A: Math. Gen. v. 35 (2002) 5333-5345], concerning the derivation of the Ermakov invariant from Noether symmetry methods, are not new

Analytical performance and clinical utility of the INNOTEST (R) PHOSPHO-TAU(181P) assay for discrimination between Alzheimer's disease and dementia with Lewy bodies

Background: Total tau (T-tau) and beta-amyloid((1-42)) (A beta(1-42)) levels in cerebrospinal fluid (CSF) can differentiate Alzheimer's disease (AD) from normal aging or depressive pseudo-dementia. Differential diagnosis from dementia with Lewy bodies (DLB) in clinical settings is difficult. Methods: The analytical performance of the INNOTEST (R) PHOSPHO-TAU((181P)) assay was validated in terms of selectivity, sensitivity, specificity, precision, robustness, and stability. Clinical utility of the assay alone, or combined with T-tau and AP1-421 for discrimination of AD (n=94) from patients suffering from DLB (n=60) or from age-matched control subjects (CS) (n=60) was assessed in a multicenter study. Results: CSF concentrations of tau phosphorylated at threonine 181 (P-tau(181P)) in AD was significantly higher than in DLB and CS. Discriminant analysis, a classification tree, and logistic regression showed that P-tau(181P) was the most statistically significant single variable of the three biomarkers for discrimination between AD and DLB. Conclusions: P-tau(181P) quantification is a robust and reliable assay that may be useful in discriminating AD from DLB

On the Lie symmetries of a class of generalized Ermakov systems

The symmetry analysis of Ermakov systems is extended to the generalized case where the frequency depends on the dynamical variables besides time. In this extended framework, a whole class of nonlinearly coupled oscillators are viewed as Hamiltonian Ermakov system and exactly solved in closed form

Устройство контроля цифровых микросхем

В процессе исследования проводилисьобзор литературы, разработана структурная схема прибора и питания, разработана принципиальная схема прибора и питания. В результате исследованиябыли получены структурная схема и принципиальная схема прибора и питания.In the process of research, literature review was conducted, a structural diagram of the device and power supply was developed, and a schematic diagram of the device and power was developed. As a result of the research, a structural diagram and a schematic diagram of the device and power supply were obtained

Soil quality under different uses and native Cerrado

O uso sustentável do solo tem-se constituído em tema de crescente relevância, em face do aumento das atividades antrópicas. Com o objetivo de avaliar a qualidade do solo em área de Cerrado nativo e em áreas sob diferentes usos, foram amostradas camadas de Latossolo Vermelho-Amarelo sob quatro tipos de ocupação: pastagem natural, pastagem cultivada, cultivo convencional com culturas anuais e florestamento de pínus. As áreas estão localizadas na Fazenda Água Limpa, DF. Foram avaliados os seguintes atributos de qualidade do solo: densidade do solo, resistência mecânica à penetração, taxa de infiltração de água, teor de matéria orgânica, capacidade de troca catiônica, C total da biomassa microbiana e respiração basal. Com base nos dados obtidos, foi organizado um diagrama comparativo e calculado um índice da qualidade do solo para cada tipo de uso. Os resultados evidenciaram relação estreita e inversa entre a qualidade do solo e a intensidade de uso a que as áreas foram submetidas. Mediante análise desses atributos e da elaboração de um modelo comparativo, foi possível avaliar o nível de degradação do solo em função do uso de cada área.Sustainable soil use is becoming increasingly relevant given the increase of anthropic activities. In order to evaluate the soil quality, soil samples were collected from five areas: natural Cerrado (reference), native pasture, planted pasture, annual crops under conventional tillage and pine forest. The areas are located in the Federal District, Brazil, in a clayey Red Yellow Latosol (Acrustox). The following soil quality attributes were measured: bulk density, mechanical resistance to penetration, water infiltration rate, organic matter content, cation exchange capacity, carbon of microbial biomass and basal respiration. Based on the obtained data a comparative diagram was drawn and a soil quality index calculated for each type of use. The results showed a close inverse relationship between soil quality and intensity of use to which the areas were submitted. By analyzing these attributes and the establishment of a comparative model it was possible to evaluate the level of soil degradation caused by each type of use in each area

Neurodegeneration and the ordered assembly of α-synuclein

In 2017, it was two hundred years since James Parkinson published “An Essay on the Shaking Palsy” and twenty years since α-synuclein aggregation came to the fore. In 1998, multiple system atrophy joined Parkinson’s disease and dementia with Lewy bodies as the third major synucleinopathy. Here we describe the work, which led to the identification of α-synuclein in Lewy bodies, Lewy neurites and Papp-Lantos bodies. We also review some of the findings reported since 1997.MGS is supported by the UK Medical Research Council, Alzheimer’s Research UK, Gates International, Astra Zeneca, Cambridge Biomedical Centre, Addenbrooke’s Hospital Trust, the National Centre for the Replacement, Refinement and Reduction of Animals in Research and Horizon 2020 IMPRiND. MG is an Honorary Professor in the Department of Clinical Neurosciences of the University of Cambridge. He is supported by the UK Medical Research Council (MC_U105184291), the EU Joint Programme – Neurodegenerative Disease Research and Horizon 2020 IMPRiND