On the Integrability of the Bukhvostov-Lipatov Model

The integrability of the Bukhvostov-Lipatov four-fermion model is investigated. It is shown that the classical model possesses a current of Lorentz spin 3, conserved both in the bulk and on the half-line for specific types of boundary actions. It is then established that the conservation law is spoiled at the quantum level -- a fact that might indicate that the quantum Bukhvostov-Lipatov model is not integrable, contrary to what was previously believed.Comment: 11 pages, 1 figure, LaTeX2e, AMS; new references adde

Aplicação do plano fatorial para o estudo de betão auto-compactável com incorporação de resíduo da indústria petrolífera

Dissertação para obtenção do grau de mestre em Engenharia Civil na área de Especialização de EdificaçõesO presente trabalho final de mestrado na opção de dissertação, teve como propósito a aplicação de um plano fatorial de experiências para o estudo de betão auto-compactável (BAC) com incorporação de resíduo gerado na refinaria de Sines em Portugal, através da substituição parcial de cimento, revelando que se traduz em bons desempenhos tanto em argamassas como em betões e que asseguram a auto-compactabilidade conforme a norma NP EN 206-9. A reutilização deste resíduo permite a Indústria da Construção, na produção de materiais à base de cimento efetuar poupanças em recursos, diminuindo o consumo de matérias primas e consequentemente reduzir a emissão de poluentes atmosféricos. Por outro lado, a Indústria Petrolífera alcança estes objetivos porque reduz a quantidade de resíduo a tratar em aterros sanitários. Deste modo são alcançados dois dos objetivos da Agenda 2030 da Organização das Nações Unidas sobre o desenvolvimento sustentável. O estudo da composição de BAC é um processo que é feito utilizando métodos e resultados de outros trabalhos da mesma natureza e área de investigação, que consiste em efetuar numa primeira fase a otimização da composição de argamassas utilizando parâmetros da composição como variáveis experimentais e que permitem a viabilidade da produção de betões com os mesmos parâmetros numa fase posterior. O método utilizado para a definição da composição do betão foi o plano fatorial de experiências onde é possível estudar o efeito dos parâmetros da composição Vg/Vg,lim e Vs/Vm nas diferentes propriedades de BAC. No entanto neste TFM não se efetuou o ajuste dos modelos numéricos. As propriedades dos betões no estado fresco foram avaliadas através do ensaio de espalhamento (Slump), ensaio de fluidez (Funil V), ensaio de capacidade de passagem (Caixa L). E no estado endurecido através do ensaio de velocidade de propagação de ultrassons e ensaios de resistência mecânica. Estas propriedades foram avaliadas à luz das especificações requeridas pelas normas europeias em vigor e por procedimentos comumente utilizados na avaliação de BAC.This dissertation presents the final work of master that had as its purpose the implementation of the statistical design of experiments approach in self-compacting concrete (SCC) study with incorporation of a waste generated by the oil refinery at Sines in Portugal. Through the partial replacement of cement this composition leads to good performances, both in mortars and concretes, and achieve adequate self-compactability in compliance with European Standard EN 206-9. The reuse of this waste allows the construction industry in cement based materials production to make savings in resources and thus reduce the consumption of raw materials and therefore reduce the emission of air pollutants. On the other hand, the Oil Industry achieves these goals by reducing the amount to treat of this waste in landfills. With these actions two of the goals of 2030 Agenda for sustainable development of United Nations are achieved. The study of SCC composition is a process and is performed using methods and results from other studies of the same nature and area of research which consists in: at first stage, to optimize the composition of mortars using mixture parameters and experimental variables that allow the viability of producing concrete at an advanced stage with the same parameters. Statistical design of experiments approach was used to define the composition which allows to study the effect of the composition parameters Vg/Vg,lim and Vs/vm on different SCC properties. However in this dissertation the numerical models were not adjusted. Evaluation of the properties of concrete in fresh-state were conducted by means of slump flow, V-funnel and L-box tests. Ultrasonic pulse velocity and compressive strength tests were conducted to characterize concrete mixtures in the hardened. These were carried out according to the specifications required by European Standards and procedures commonly used in the evaluation of SCC.N/

Epigenetic mediation of AKT1 rs1130233's Effect on delta-9-tetrahydrocannabinol-induced medial temporal function during fear processing

High doses of delta-9-tetrahydrocannabinol (THC), the main psychoactive component of cannabis, have been shown to have anxiogenic effects. Additionally, THC effects have been shown to be modulated by genotype, including the single nucleotide polymorphism (SNP) rs1130233 at the protein kinase AKT1 gene, a key component of the dopamine signalling cascade. As such, it is likely that epigenetic methylation around this SNP may affect AKT gene expression, which may in turn impact on the acute effects of THC on brain function. We investigated the genetic (AKT1 rs1130233) and epigenetic modulation of brain function during fear processing in a 2-session, double-blind, cross-over, randomized placebo-controlled THC administration, in 36 healthy males. Fear processing was assessed using an emotion (fear processing) paradigm, under functional magnetic resonance imaging (fMRI). Complete genetic and fMRI data were available for 34 participants. THC caused an increase in anxiety and transient psychotomimetic symptoms and para-hippocampal gyrus/amygdala activation. Number of A alleles at the AKT1 rs1130233 SNP, and percentage methylation at the CpG11-12 site, were independently associated with a greater effect of THC on activation in a network of brain regions including left and right parahippocampal gyri, respectively. AKT1 rs1130233 moderation of the THC effect on left parahippocampal activation persisted after covarying for methylation percentage, and was partially mediated in sections of the left parahippocampal gyrus/hippocampus by methylation percentage. These results may offer an example of how genetic and epigenetic variations influence the psychotomimetic and neurofunctional effects of THC

Next generation earth‑to‑space telecommand coding and synchronization: ground system design, optimization and software implementation

The Consultative Committee for Space Data Systems, followed by all national and international space agencies, has updated the Telecommand Coding and Synchronization sublayer to introduce new powerful low-density parity-check (LDPC) codes. Their large coding gains significantly improve the system performance and allow new Telecommand services and profiles with higher bit rates and volumes. In this paper, we focus on the Telecommand transmitter implementation in the Ground Station baseband segment. First, we discuss the most important blocks and we focus on the most critical one, i.e., the LDPC encoder. We present and analyze two techniques, one based on a Shift Register Adder Accumulator and the other on Winograd convolution both exploiting the block circulant nature of the LDPC matrix. We show that these techniques provide a significant complexity reduction with respect to the usual encoder mapping, thus allowing to obtain high uplink bit rates. We then discuss the choice of a proper hardware or software platform, and we show that a Central Processing Unit-based software solution is able to achieve the high bit rates requested by the new Telecommand applications. Finally, we present the results of a set of tests on the real-time software implementation of the new system, comparing the performance achievable with the different encoding options

Forequarter amputation for local recurrence of sarcoma after previous amputation through the shoulder in a female patient – A case report

Abstract Forequarter amputation is a very demolitive surgical procedure that affects the quality of life and it is performed when the tumour involves the proximal end of homerus and the shoulder. We describe here the case of a female patient with a recurrent dedifferentiated liposarcoma of the upper limb already treated with tumour asportation, isolated limb perfusion and upper limb amputation through the shoulder, who returned to our attention for a recurrence of the sarcoma in the stump. We then performed a forequarter amputation in a previous amputated limb. Since the patient underwent numerous surgical procedures, our last surgical approach was a quite challenging one. To our knowledge, it is the first described case of an interscapular-thoracic disarticulation after a previous amputation to the shoulder

Floristic composition and structure of tree community on the transition Lowland - Lowermontane Ombrophilous Dense Forest in Núcleo Picinguaba/Serra do Mar State Park, Ubatuba, southeastern Brazil

We conducted floristic and structural surveys on arboreous component (circumference at breast high &gt; 15 cm) in 1 ha plot (100 sub-plots of 10 × 10 m) located in a stretch of Atlantic Ombrophilous Dense Forest Lowland-Lower montane transition, in Núcleo Picinguaba/PESM, Ubatuba, São Paulo State. The regenerating layer (H &gt; 1.5 m and circumference at breast height < 15 cm) was sampled in 0.4 ha (40 sub-plots of 10 × 10 m) within the plot. The richness and diversity were 156 species and H' = 4.00 for the arboreous component in 1 ha, 173 and H' = 4.25 for arboreous (113 species) and regenerating (134 species) layers together in 0.4 ha, and 192 species considering the whole sample. The most abundant species in the tree layer were Euterpe edulis, with 191 individuals (14.8%), Mollinedia schottiana (5.1%), Rustia formosa (4.8%), Chrysoplhyllum flexuosum (4.7%), Coussarea meridionalis var. porophylla (4.7%) and Guapira opposita (4.4%). These species were also among the most abundant in the regenerating layer. The richest families were Myrtaceae (32 spp.), Rubiaceae (15), Fabaceae (13), Sapotaceae (10), Moraceae (eight), Euphorbiaceae (seven) and Lauraceae (six). Tree species richness varied positively with density along the vertical structure of vegetation, being higher in lower high classes, where the density is much larger. On the other hand, the evenness in these classes was lower, increasing toward the upper classes, where trees are not concentrated in few species.Realizamos o levantamento florístico e estrutural do componente arbóreo (PAP &gt; 15 cm) em uma parcela de 1 ha (100 sub-parcelas de 10 × 10 m) localizada em um trecho da transição Floresta Ombrófila Densa Atlântica das Terras Baixas-Submontana, no Núcleo Picinguaba/PESM, Ubatuba, Estado de São Paulo. O estrato regenerante (H &gt; 1,5 m e PAP < 15 cm) foi amostrado em 0,4 ha (40 sub-parcelas 10 × 10 m) dentro da parcela. A riqueza florística e a diversidade foram de 156 espécies e H' = 4,00 para o componente arbóreo em 1 ha, 173 e H' = 4,25 para os estratos arbóreo (113 espécies) e regenerante (134) em 0,4 ha e 192 espécies considerando toda a amostragem. As espécies mais abundantes no estrato arbóreo foram Euterpe edulis, com 191 indivíduos (14,8%), Mollinedia schottiana (5,1%), Rustia formosa (4,8%), Chrysoplhyllum flexuosum (4,7%), Coussarea meridionalis var. porophylla (4,7%) e Guapira opposita (4,4%). Estas espécies estiveram entre as mais abundantes também no estrato regenerante. As famílias com maior riqueza foram Myrtaceae (32 spp.), Rubiaceae (15), Fabaceae (13), Sapotaceae (10), Moraceae (oito), Euphorbiaceae (sete) e Lauraceae (seis). A riqueza de espécies arbóreas variou positivamente com a densidade ao longo do gradiente vertical estrutural da vegetação, sendo maior nas classes mais baixas de altura, onde a densidade é expressivamente maior. Por outro lado, nestas classes a equabilidade é mais baixa, aumentando em direção às classes superiores, onde as árvores não estão concentradas em poucas espécies.285299Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

Protective Effect of Wheat Derived Non-specific lipid-transfer Protein 2 on Vascular Endothelium Inflammation

The important functions of the endothelium and the relationship between cardiovascular risk factors and endothelial dysfunction suggest the primary role of this tissue as a target for dietary strategies aimed at the prevention from related diseases. Cereals are key component of a healthy and balanced diet, and the presence of non-specific lipid-transfer protein 2 (nsLTP2) in wheat represents an added value to contribute to maintain the functionality of the vascular endothelium and consequently of the cardiovascular system. Indeed, nsLTP2 downregulates the expression of the main cell adhesion molecules induced by a pro-inflammatory cytokine and, meanwhile, upregulates heme oxigenase-1, exerting a cytoprotective/anti-inflammatory activity. Therefore, nsLTP2 might represent a food-derived tool to protect the vascular system against several pathological condition