Idealized Carbon-Based Materials Exhibiting Record Deliverable Capacities for Vehicular Methane Storage

Materials for vehicular methane storage have been extensively studied, although no suitable material has been found. In this work, we use molecular simulation to investigate three types of carbon-based materials, Schwarzites, layered graphenes, and carbon nanoscrolls, for use in vehicular methane storage under adsorption conditions of 65 bar and 298 K and desorption conditions of 5.8 bar and 358 K. Ten different Schwarzites were tested and found to have high adsorption with maximums at 273 VSTP/V, but middling deliverable capacities of no more than 131 VSTP/V. Layered graphene and graphene nanoscrolls were found to have extremely high CH4 adsorption capacities of 355 and 339 VSTP/V, respectively, when the interlayer distance was optimized to 11 Å. The deliverable capacities of perfectly layered graphene and graphene nanoscrolls were also found to be exceptional with values of 266 and 252 VSTP/V, respectively, with optimized interlayer distances. These values make idealized graphene and nanoscrolls the record holders for adsorption and deliverable capacities under vehicular methane storage conditions

ABUSO SEXUAL DE CRIANÇAS E ADOLESCENTES E SUAS REPERCUSSÕES

O abuso sexual é um problema de saúde pública em que um adulto utiliza-se de uma criança ou adolescente para satisfazer seu desejo sexual, através de carícias, manipulação de genitália, mama ou ânus, exploração sexual, voyeurismo, pornografia, exibicionismo, até o ato sexual, com ou sem penetração, transgredindo assim, as normas sociais, morais e legais. Dada à considerável incidência e as graves complicações decorrentes desta prática às vítimas decorre-se o presente estudo. Objetiva analisar as contribuições da literatura nacional e internacional sobre o panorama quantitativo e qualitativo dos casos de abuso sexual praticado contra crianças e adolescentes e suas principais complicações e sequelas. Efetuou-se uma revisão de literatura utilizando artigos das bases de dados Scielo, LILACS e MEDLINE. Utilizou-se os seguintes descritores: Abuso sexual, violência, crianças, adolescentes, complicações. Nos Estados Unidos, as denúncias junto às autoridades legais apresentam taxas variáveis de 16 a 32%, com cerca de 300 a 350 mil pessoas com idade de 12 anos ou mais vitimizadas anualmente, e igual número de vítimas com idade abaixo de 12 anos. No Brasil, inexistem dados globais a respeito do fenômeno, estimando-se que menos de 10% dos casos chegam às delegacias. Apesar da intensificação de pesquisas brasileiras que investigam a dinâmica e os efeitos desta forma de violência, constata-se a necessidade de estudos sobre a avaliação e a intervenção psicológica. O desenvolvimento de pesquisas sobre tais métodos é importante, devido à elevada incidência e às consequências negativas para o desenvolvimento cognitivo, afetivo e social das vítimas

Partial integration and local mean-field approach for a vector lattice model of microemulsions

A vector model on the simple cubic lattice, describing a mixture of water, oil, and amphiphile, is considered. An integration over the amphiphile orientational degrees of freedom is performed exactly in order to obtain an effective Hamiltonian for the system. The resulting model is a three-state (spin-1) system and contains many-site interaction terms. The analysis of the ground state reveals the presence of the water-oil-rich phase as well as the amphiphile-rich and the cubic phases. The temperature phase diagram of the system is analyzed in a local mean-field approach, and a triple line of water-rich, oil-rich, and microemulsion coexistence is obtained. For some values of the model parameters, lamellar phases also appear in the system, but only at finite temperature. The Lifshitz line is determined in a semianalytical way in order to locate the microemulsion region of the disordered phase

Uso da ibogaína no transtorno por uso de substância: uma revisão de literatura

O transtorno por uso de substâncias (TUS) corresponde a um padrão em que os pacientes usam determinada substância e têm prejuízos em várias esferas das vidas, sendo uma problemática evidente de morbimortalidade em muitos países. Nesse contexto, a ibogaína vem sendo estudada para o tratamento do TUS. Tal função medicamentosa está interligada à capacidade de gerar múltiplas interações com neurotransmissores associados à adicção. Assim, apesar de ser uma substância utilizada em diversos âmbitos há séculos, é essencial o estudo adequado da ibogaína para verdadeiro entendimento da droga e de seus possíveis efeitos no corpo humano. Dessa forma, esse estudo foi baseado em publicações de 2017 a 2022 encontrados no Pubmed, Google Acadêmico e Scielo e realizada revisão bibliográfica. As pesquisas evidenciaram que o uso de ibogaína para o tratamento do uso nocivo de substâncias pode ser intervenção eficaz, reduzindo sintomas de abstinência e do desejo de uso. No entanto, outros estudos relataram complicações graves, inclusive mortes, que parecem ter relação com os efeitos neurotóxicos e cardiotóxicos. A ausência de efeitos da ibogaína no TUS pode estar relacionada a fatores como a equivalência entre as doses terapêuticas não ser bem conhecida, a falta de grupos controle e placebo nos estudos e, ainda, o fato de que muitos dos tratamentos foram realizados em contextos não médicos. Além disso, tratam-se de estudos com reduzido número de amostras, evidenciando limitação para compreensão dos benefícios existentes

Clinical and Urodynamic results of the Argus T® sling in moderate and severe male stress urinary incontinence after radical prostatectomy – a 5 year prospective study.

ABSTRACT Purpose: Sling as a therapeutic option for male stress urinary incontinence (SUI) has been reviewed in the last two decades, as it is a relatively simpliest surgery compared to artificial urinary sphincter and has the ability to modulate urethral compression. This study aims to evaluate the efficacy, rate of complications, quality of life and the effects on bladder emptying of the Argus T® compressive and ajustable sling in moderate and severe male SUI treatment. Materials and Methods: Men eligible for stress urinary incontinence treatment after radical prostatectomy were recruited and prospectively evaluated, from March 2010 to November 2016. It was selected outpatient men with moderate and severe SUI, after 12 months of radical prostatectomy, who have failed conservative treatment. All patients had a complete clinical and urodynamic pre and post treatment evaluation, by means of clinical history, physical examination, urine culture, 1-hour pad test and ICIq-SF questionnaire. The UDS was performed after 12, 18 and 24 months postoperatively. Results: Thirty-seven men underwent sling surgery, 19 patients (51.4%) with moderate and 18 (48.6%) with severe SUI. The minimum follow-up time was 5 years. Overall, we had a success rate of 56.7% at 60 months follow-up. After surgery, we did not observe significant changes in the urodynamic parameters evaluated during the follow-up. No patient had urodynamic bladder outlet obstruction (BOO) after sling implantation. Readjustment of the Argus T® sling was performed in 16 (41%) of the patients and 51% of the patients reported some adverse event. Conclusion: We demonstrate a long-term efficacy and safety of Sling Argus T® as an alternative to moderate and severe male SUI treatment. Furthermore, in our study bulbar urethra compression does not lead to bladder outlet obstruction

A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector

A search for the dimuon decay of the Standard Model (SM) Higgs boson is performed using data corresponding to an integrated luminosity of 139 fb(-1) collected with the ATLAS detector in Run 2 pp collisions at root s = 13 TeV at the Large Hadron Collider. The observed (expected) significance over the background-only hypothesis for a Higgs boson with a mass of 125.09 GeV is 2.0 sigma (1.7 sigma). The observed upper limit on the cross section times branching ratio for pp -> H -> mu mu is 2.2 times the SM prediction at 95% confidence level, while the expected limit on a H -> mu mu signal assuming the absence (presence) of a SM signal is 1.1(2.0). The best-fit value of the signal strength parameter, defined as the ratio of the observed signal yield to the one expected in the SM, is mu = 1.2 +/- 0.6. (C) 2020 The Author(s). Published by Elsevier B.V

Alignment of the ATLAS Inner Detector in Run 2

The performance of the ATLAS Inner Detector alignment has been studied using pp collision data at v s = 13 TeV collected by the ATLAS experiment during Run 2 (2015-2018) of the Large Hadron Collider (LHC). The goal of the detector alignment is to determine the detector geometry as accurately as possible and correct for time-dependent movements. The Inner Detector alignment is based on the minimization of track-hit residuals in a sequence of hierarchical levels, from global mechanical assembly structures to local sensors. Subsequent levels have increasing numbers of degrees of freedom; in total there are almost 750,000. The alignment determines detector geometry on both short and long timescales, where short timescales describe movementswithin anLHCfill. The performance and possible track parameter biases originating from systematic detector deformations are evaluated. Momentum biases are studied using resonances decaying to muons or to electrons. The residual sagitta bias and momentum scale bias after alignment are reduced to less than similar to 0.1 TeV-1 and 0.9 x 10(-3), respectively. Impact parameter biases are also evaluated using tracks within jets

Measurement of hadronic event shapes in high-p T multijet final states at √s = 13 TeV with the ATLAS detector

A measurement of event-shape variables in proton-proton collisions at large momentum transfer is presented using data collected at s = 13 TeV with the ATLAS detector at the Large Hadron Collider. Six event-shape variables calculated using hadronic jets are studied in inclusive multijet events using data corresponding to an integrated luminosity of 139 fb−1. Measurements are performed in bins of jet multiplicity and in different ranges of the scalar sum of the transverse momenta of the two leading jets, reaching scales beyond 2 TeV. These measurements are compared with predictions from Monte Carlo event generators containing leading-order or next-to-leading order matrix elements matched to parton showers simulated to leading-logarithm accuracy. At low jet multiplicities, shape discrepancies between the measurements and the Monte Carlo predictions are observed. At high jet multiplicities, the shapes are better described but discrepancies in the normalisation are observed. [Figure not available: see fulltext.