607 research outputs found
Olympic and paralympic games Rio 2016: a technical-tactical analysis of judo matches
The purpose of this study was to compare the athletesâ scores, penalties and efficiency between the Olympic and Paralympic Games Rio 2016, and identify which variable determined the winner of the matches. A total of 608 matches in the Olympic and Paralympic Games were analysed. Total relative scores (ippon, waza ari and yuko), penalties (shido per match) and efficiency were identified in the male and female categories, Olympic and Paralympic Games, and medallists and non-medallists. The main results showed that waza ari was higher in the Olympic Games (p=.05) than in the Paralympic Games (male team); ippon was higher in the Paralympic Games (p=.05) and shido was higher in the Olympic Games (p=.05) (female team). The male Olympic medallists were more efficient (p=.01), while the female Paralympic medallists were less penalised (p=.01). Ippon was the key variable that determined winning in both the Olympic and Paralympic matches (p<.001). We concluded that the male Olympic judo athletes showed greater efficiency and scores than Paralympians, while the female team presented more scores and fewer penalties. Ippon was the key point that determined victory in most of the matches
Injury prevalence in Brazilian jiu-jitsu athletes: comparison between different competitive levels
This study aimed to identify types and sites of body injury, location of injury occurrence, and the mechanism and severity of injuries in novice and advanced Brazilian jiu-jitsu (BJJ) athletes. One hundred and eight BJJ athletes took part in this study separated in two groups: advanced (n = 53) and novice (n = 55). Athletes answered a questionnaire concerning regions of injury, locality of occurrence, injury severity and mechanism. Chi square test and a logistic regression analysis were used with the level of significance set at p < 0.05. The main results showed that shoulders and knees were the most injury location reported by novice and advanced athletes. Novice athletes demonstrated higher prevalence of injuries during training sessions (54.5%), whereas advanced athletes reported more injuries during competitions (66.1%). Significant associations between novice and advanced athletes were observed for major joints (p < 0.05). The odds ratio of having injury was 70-87% less for novice versus advanced athletes for the major joints cited. We concluded that BJJ athletes demonstrate high prevalence of injury mainly at knee and shoulder. While risk of injury appeared less in novice, the advanced demonstrated higher number of injuries during competitions as a consequence of injured joint keys. By contrast, novice athletes reported higher number of injuries associated with training sessions as a consequence of overuse
Optical Properties And Antiangiogenic Activity Of A Chalcone Derivate
Chalcones and their derivatives exhibit numerous pharmacological activities such as antibacterial, antifungal, cytotoxic, antinociceptive and anti-inflammatory. Recently, they have been assessed aiming for novel application in nonlinear optics and in the treatment of immune diseases and cancers. In this study, we investigate the optical properties of synthetic chalcona 1E,4E-1-(4-chlorophenyl)-5-(2,6,6-trimethylcyclohexen-1-yl)penta-1,4-dien-3-one (CAB7β) and its antiangiogenic potential using the chorioallantoic membrane (CAM) with the S180 sarcoma cell line. Experimental and theoretical results show intense absorption in the UVA-UVC region, which is associated with a Ď â Ď* transition with intramolecular charge transfer from the trimethyl-cyclohexen-1-yl ring to the chlorophenyl ring. Quantum chemical calculations of the first hyperpolarizability, accounting for both solvent and frequency dispersion effects, are in very good concordance with hyper-Rayleigh scattering measurements. In addition, two-photon absorption allowed band centered at 650 nm was observed. Concerning antiangiogenic activity, CAB7β causes a significant reduction in the total number, junctions, length and caliber of blood vessels stimulated by S180 cells reducing the presence of blood vessels, inflammatory cells and others elements related to angiogenic process. It is found that CAB7β is a versatile compound and a promising candidate for linear and nonlinear optical applications, in therapy against sarcoma and phototherapy
Realização de interação mediada por telefone com idosos após a alta hospitalar:experiência de um programa de residência multiprofissional
Introdução: a transição do cuidado, principalmente no momento da alta hospitalar, ĂŠ considerada um momento crĂtico e de muitaansiedade para o paciente. Destacam-se os problemas relacionados ao uso de medicamentos, principalmente quando ocorremmudanças nas prescriçþes de fĂĄrmacos no momento da alta, quando comparado aos medicamentos prescritos na prĂŠ-internação.A continuidade do uso de novos medicamentos apĂłs a alta pode gerar comprometimentos, principalmente quando nos referimosaos pacientes idosos, que apresentam especificidades fisiolĂłgicas e cognitivas que influenciam o uso dos medicamentos. Com ointuito de melhor identificar possĂveis barreiras e propiciar segurança durante a continuidade do cuidado, um grupo composto porfarmacĂŞuticos propĂ´s a realização de Interação Mediada por Telefone (IMT) com pacientes idosos que receberam alta hospitalare que encontravam-se no ambiente domiciliar. Objetivo: identificar as açþes realizadas e resultados alcançados por meio da IMT.Metodologia: realizou-se um estudo transversal de carĂĄter exploratĂłrio, onde os registros em prontuĂĄrios eletrĂ´nicos e planilha doserviço de IMT foram analisados, com descrição do perfil dos pacientes e realização de regressĂŁo logĂstica a partir das caracterĂsticasdos pacientes e equipe de referĂŞncia a qual pertenciam na internação (Acidente Vascular Cerebral; Equipe Idoso FrĂĄgil; CuidadosPaliativos; Equipe de oferecimento de cuidados aos pacientes com Comprometimento do PĂŠ DiabĂŠtico e Equipe de Atendimento aPacientes com Fratura de FĂŞmur). Resultados: 87 pacientes idosos participaram do IMT sendo 44 (50,6%) do sexo feminino e 43 (49,4%)do sexo masculino. A mĂŠdia da idade dos pacientes foi de 73,7 anos, com desvio padrĂŁo de 8,3. Um percentual de 52,9% dos pacientesrelataram procurar atendimento na Atenção PrimĂĄria apĂłs a alta hospitalar, 20% relataram dificuldade no acesso, 13% relataram usode medicamentos diferentes dos prescritos na alta, conforme orientação mĂŠdica na Atenção PrimĂĄria, e 13% automedicação. Nomodelo final da regressĂŁo logĂstica, identificou-se que idade igual ou superior a 75 anos foi associada positivamente ao pertencimentodo paciente na equipe Idoso FrĂĄgil/Cuidados Paliativos. Ainda no modelo final, a ocorrĂŞncia de automedicação tambĂŠm estevepositivamente associada Ă equipe Idoso FrĂĄgil (OR=6,8; p<0,05).ConclusĂŁo: entende-se que o serviço de IMT apresentou-se comointeressante ferramenta para identificação de problemas farmacoterapĂŞuticos apĂłs a alta hospitalar. Automedicação apĂłs a altahospitalar esteve associada positivamente aos pacientes das equipes cuidados paliativos/idoso frĂĄgil quando comparado Ă UnidadeAVC e idade inferior a 75 anos esteve positivamente associada Ă Equipe complicaçþes do pĂŠ diabĂŠtico
MACROECOLOGIA, BIOGEOGRAFIA E ĂREAS PRIORITĂRIAS PARA CONSERVAĂĂO NO CERRADO
revista vol 13 nÂş 3.indd HĂĄ consenso entre os cientistas de que a hĂĄ atualmente uma âcrise da biodiversidadeâ, resultado da constante e intensa perda de habitat natural causada pela expansĂŁo da ocupação. Como a biologia da conservação tem sido muitas vezes reconhecida como uma ciĂŞncia da crise, ela deve fornecer informaçþes capazes de mediar, de forma mais cientĂfica possĂvel, as tomadas de decisĂŁo que sĂŁo necessĂĄrias. Dentre estas, uma das mais importantes ĂŠ indicar regiĂľes prioritĂĄrias para a conservação, jĂĄ que por motivos Ăłbvios nĂŁo ĂŠ possĂvel preservar todos os ecossistemas por inteiro. Nesse contexto, recentemente sugeriu-se que a aplicação de princĂpios, teorias e anĂĄlises provenientes da biogeografia e da macroecologia seriam importantes na Biologia da Conservação, formalizando uma abordagem que tem sido denominada âBiogeografia da Conservaçãoâ. Assim, o objetivo deste artigo ĂŠ discutir e revisar esses componentes da biogeografia da conservação, utilizando uma abordagem macroecolĂłgica para desenvolver e aplicar mĂŠtodos de planejamento sistemĂĄtico em conservação, utilizando o bioma Cerrado como um modelo de estudo. Foram discutidos inicialmente os padrĂľes de riqueza e diversidade beta e, em um segundo momento, como esses padrĂľes podem ser correlacionados Ă ocupação humana do Bioma. Essa relação ĂŠ fundamental para subsidiar a aplicação de modelos de planejamento sistemĂĄtico de conservação em escala regional (anĂĄlises de insubstituibilidade, complementaridade e de lacunas). Ă preciso considerar tambĂŠm que hĂĄ sĂŠrias falhas de conhecimento sobre os padrĂľes de biodiversidade na regiĂŁo e que a escolha de grupos indicadores pode ser importante para minimizar problemas gerados pela falta de conhecimento. Assim, essa abordagem ĂŠ interessante em um cenĂĄrio de grandes incertezas (ausĂŞncia de dados detalhados) e de rĂĄpida transformação da paisagem, possibilitando a otimização de estudos em grandes escalas e depois transferir os resultados para escalas espaciais mais locais e realmente relevantes para a conservação. Nessas regiĂľes, podem ser realizados, em um segundo momento, estudos mais detalhados a fim de avaliar padrĂľes de viabilidade populacional, fragmentação de habitat e regiĂľes potenciais de manutenção da diversidade genĂŠtica
EFICIĂ?NCIA DO MĂ?TODO DE ESPECTROMETRIA DE MASSAS EM DROGAS DE ABUSO
Resumo: com objetivo demonstrar o papel da Espectrometria de Massas como ferramenta Ă identificação de vĂĄrias drogas e destacar seus principais efeitos no organismo humano, realizamos uma revisĂŁo, por meio de bases de dados online, periĂłdicos cientĂficos e livros, analisando publicaçþes dos Ăşltimos 10 anos. Foi alvo deste estudo drogas como cocaĂna, ecstasy, LSD, maconha e crack. A Espectrometria de Massas ĂŠ uma tĂŠcnica fundamental para os testes preliminares de triagem de drogas e essencial para a caracterização destas molĂŠculas.
Palavras-chave: Espectrometria de massa. Drogas de abuso. QuĂmica
Forense
Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV
A search for a Higgs boson decaying into two photons is described. The
analysis is performed using a dataset recorded by the CMS experiment at the LHC
from pp collisions at a centre-of-mass energy of 7 TeV, which corresponds to an
integrated luminosity of 4.8 inverse femtobarns. Limits are set on the cross
section of the standard model Higgs boson decaying to two photons. The expected
exclusion limit at 95% confidence level is between 1.4 and 2.4 times the
standard model cross section in the mass range between 110 and 150 GeV. The
analysis of the data excludes, at 95% confidence level, the standard model
Higgs boson decaying into two photons in the mass range 128 to 132 GeV. The
largest excess of events above the expected standard model background is
observed for a Higgs boson mass hypothesis of 124 GeV with a local significance
of 3.1 sigma. The global significance of observing an excess with a local
significance greater than 3.1 sigma anywhere in the search range 110-150 GeV is
estimated to be 1.8 sigma. More data are required to ascertain the origin of
this excess.Comment: Submitted to Physics Letters
Search for anomalous t t-bar production in the highly-boosted all-hadronic final state
A search is presented for a massive particle, generically referred to as a
Z', decaying into a t t-bar pair. The search focuses on Z' resonances that are
sufficiently massive to produce highly Lorentz-boosted top quarks, which yield
collimated decay products that are partially or fully merged into single jets.
The analysis uses new methods to analyze jet substructure, providing
suppression of the non-top multijet backgrounds. The analysis is based on a
data sample of proton-proton collisions at a center-of-mass energy of 7 TeV,
corresponding to an integrated luminosity of 5 inverse femtobarns. Upper limits
in the range of 1 pb are set on the product of the production cross section and
branching fraction for a topcolor Z' modeled for several widths, as well as for
a Randall--Sundrum Kaluza--Klein gluon. In addition, the results constrain any
enhancement in t t-bar production beyond expectations of the standard model for
t t-bar invariant masses larger than 1 TeV.Comment: Submitted to the Journal of High Energy Physics; this version
includes a minor typo correction that will be submitted as an erratu
Measurement of the Lambda(b) cross section and the anti-Lambda(b) to Lambda(b) ratio with Lambda(b) to J/Psi Lambda decays in pp collisions at sqrt(s) = 7 TeV
The Lambda(b) differential production cross section and the cross section
ratio anti-Lambda(b)/Lambda(b) are measured as functions of transverse momentum
pt(Lambda(b)) and rapidity abs(y(Lambda(b))) in pp collisions at sqrt(s) = 7
TeV using data collected by the CMS experiment at the LHC. The measurements are
based on Lambda(b) decays reconstructed in the exclusive final state J/Psi
Lambda, with the subsequent decays J/Psi to an opposite-sign muon pair and
Lambda to proton pion, using a data sample corresponding to an integrated
luminosity of 1.9 inverse femtobarns. The product of the cross section times
the branching ratio for Lambda(b) to J/Psi Lambda versus pt(Lambda(b)) falls
faster than that of b mesons. The measured value of the cross section times the
branching ratio for pt(Lambda(b)) > 10 GeV and abs(y(Lambda(b))) < 2.0 is 1.06
+/- 0.06 +/- 0.12 nb, and the integrated cross section ratio for
anti-Lambda(b)/Lambda(b) is 1.02 +/- 0.07 +/- 0.09, where the uncertainties are
statistical and systematic, respectively.Comment: Submitted to Physics Letters
Search for new physics in events with opposite-sign leptons, jets, and missing transverse energy in pp collisions at sqrt(s) = 7 TeV
A search is presented for physics beyond the standard model (BSM) in final
states with a pair of opposite-sign isolated leptons accompanied by jets and
missing transverse energy. The search uses LHC data recorded at a
center-of-mass energy sqrt(s) = 7 TeV with the CMS detector, corresponding to
an integrated luminosity of approximately 5 inverse femtobarns. Two
complementary search strategies are employed. The first probes models with a
specific dilepton production mechanism that leads to a characteristic kinematic
edge in the dilepton mass distribution. The second strategy probes models of
dilepton production with heavy, colored objects that decay to final states
including invisible particles, leading to very large hadronic activity and
missing transverse energy. No evidence for an event yield in excess of the
standard model expectations is found. Upper limits on the BSM contributions to
the signal regions are deduced from the results, which are used to exclude a
region of the parameter space of the constrained minimal supersymmetric
extension of the standard model. Additional information related to detector
efficiencies and response is provided to allow testing specific models of BSM
physics not considered in this paper.Comment: Replaced with published version. Added journal reference and DO
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