Realizations of Conformal and Heisenberg Algebras in PP-wave-CFT Correspondence

We elaborate on the symmetry breaking pattern involved in the Penrose limit of $AdS_{d+1} \times S^{d+1}$ spacetimes and the corresponding limit of the CFT dual. For d=2 we examine in detail how the symmetries contract to products of rotation and Heisenberg algebras, both from the bulk and CFT points of view. Using a free field realization of these algebras acting on products of elementary fields of the CFT with SO(2) R charge +1, we show that this process of contraction restricts all the fields to a few low angular momentum modes and ensures that the field with R charge -1 does not appear. This provides an understanding of several important aspects of the proposal of Berenstein, Maldacena and Nastase. We also indicate how the contraction can be performed on correlation functions.Comment: 24 pages, LaTe

Enhanced top-down sensorimotor processing in somatic anxiety

Published: 25 July 2022Functional neuroimaging research on anxiety has traditionally focused on brain networks associated with the psychological aspects of anxiety. Here, instead, we target the somatic aspects of anxiety. Motivated by the growing appreciation that top-down cortical processing plays a crucial role in perception and action, we used resting-state functional MRI data from the Human Connectome Project and Dynamic Causal Modeling (DCM) to characterize effective connectivity among hierarchically organized regions in the exteroceptive, interoceptive, and motor cortices. In people with high (fear-related) somatic arousal, top-down effective connectivity was enhanced in all three networks: an observation that corroborates well with the phenomenology of anxiety. The anxiety-associated changes in connectivity were sufficiently reliable to predict whether a new participant has mild or severe somatic anxiety. Interestingly, the increase in top-down connections to sensorimotor cortex were not associated with fear affect scores, thus establishing the (relative) dissociation between somatic and cognitive dimensions of anxiety. Overall, enhanced top-down effective connectivity in sensorimotor cortices emerges as a promising and quantifiable candidate marker of trait somatic anxiety.This research was supported by the Basque Government through the BERC 2018–2021 program, by the Spanish Ministry of Science, Innovation, and Universities (BCBL Severo Ochoa excellence accreditation SEV- 2015–0490 and BCAM Severo Ochoa accreditation SEV-2017–0718), the Spanish Ministry of Economy and Competitiveness (Ramon y Cajal Fellowship, RYC-2017–21845) and the project MTM2017–82379- R(AEI/FEDER,UE) (principal investigator: Dr. Maria Xose Rodriguez, BCAM). KJF was supported by funding for the Wellcome Centre for Human Neuroimaging (Ref: 205103/Z/16/Z), a Canada-UK Artificial Intelligence Initiative (Ref: ES/T01279X/1) and the European Union’s Horizon 2020 Framework Programme for Research and Innovation under the Specific Grant Agreement No. 945539 (Human Brain Project SGA3)

Manutenção do teor de carbono na sinterização por plasma Ar-H2-CH4 de injetados em aço ao carbono baixa liga /

Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico.Neste trabalho foi estudada a manutenção do teor de carbono na sinterização por plasma de injetados de aço ao carbono baixa liga, utilizando-se uma mistura gasosa de Ar-H2-CH4. Na sinterização de um aço ao carbono a mistura Ar-H2 favorece a descarbonetação. Por isso, foi necessária a utilização de um gás portador de carbono, a fim de estabelecer no plasma um potencial efetivo de carbono que tornasse nulo o fluxo líquido deste elemento entre o material e o volume gasoso. O plasma foi caracterizado através de medidas elétricas e por espectrosccopia ótica de emissão. A seguir, efetuaram-se sinterizações a 1150°C/60min, com diferentes teores de CH4 na mistura gasosa Ar-20%H2. Análises de microssonda WDS, ensaios metalográficos e de microdureza Vickers, permitiram obter uma relação entre a quantidade de carbono total em amostras de 1,35 mm de espessura, de um aço ao carbono baixa liga, foram relacionadas com o potencial efetivo de carbono do plasma em função da quantidade de metano injetado na mistura Ar-20%H2

Favela mágica série animada infanto-juvenil com representatividade negra e periférica

A presente monografia descreve o desenvolvimento da abertura de um desenho animado, da pré-produção ao video animado finalizado, com uma representação mais consciente de povos negros e periféricos a fim de desmistificar e reeducar a sociedade para desconstruir pensamentos preconceituosos atribuídos à raça e desigualdade econômica e social, além de trazer mais identificação para jovens em processo de construção de identidade e caráter. Além de análises e pesquisas sobre a representação das favelas e pessoas pretas na mídia, cada etapa do processo da animação, desde o desenvolvimento do Briefing, ao Design de Personagem, Design de Cenários, Narrativa, Storyboard e Animação, incluindo a etapa de Rigg, é registrado nos capítulos deste documento

Parceria público-privada: riscos e mitigação de riscos em operações estruturadas de infra-estrutura

Bibliografia: p. 117.Contém glossário.O objetivo deste texto é examinar os riscos em operações estruturadas de financiamento de investimentos de infra-estrutura em parceria público-privada no Brasil e suas possíveis mitigações sob o ponto de vista dos credores, abordando o nível federal.This paper focuses a creditors approach to Brazilian PPP structured finance loan risks in infrastructure investments and its possible mitigations, considering the federal level

Open-closed duality and Double Scaling

Nonperturbative terms in the free energy of Chern-Simons gauge theory play a key role in its duality to the closed topological string. We show that these terms are reproduced by performing a double scaling limit near the point where the perturbation expansion diverges. This leads to a derivation of closed string theory from this large-N gauge theory along the lines of noncritical string theories. We comment on the possible relevance of this observation to the derivation of superpotentials of asymptotically free gauge theories and its relation to infrared renormalons.Comment: 10 pages, LaTe

Effect of the aqueous extracts of the seeds of Talisia esculenta and Sapindus saponaria on fall armyworm

The effect of aqueous extracts of Talisia esculenta (T.E.) and Sapindus saponaria (S.S.), were evaluated on the development and mortality of 8-14th day-life Spodoptera frugiperda, an important pest of maize. Corn leaves were dipped in the aqueous extracts (1% w/v) and offered as food to the caterpillars. The treated corn leaves with the extracts caused larval mortality (26.71%/T.E.; 63.3%/S.S.) and also showed effect on the larval weight (237.50 mg/T.E.; 86.65 mg/S.S.) when compared with the control (11.3% and 293.45 mg), mortality and larval weight, respectively. The electrophoresis with gelatin (0.1%) showed two very clear white areas (trypsin activity) in the caterpillars midgut of all the treatments. Only the caterpillar treated with S. saponaria presented significant differences, showing trypsin activity (10.59%). Sapindus saponaria appeared better than Talisia esculenta and showed good potential to be used as control agent for S. frugiperda.Este estudo procurou avaliar o potencial inseticida dos extratos aquosos de sementes de Talisia esculenta (St. Hil.) Radlk (Pitombal) e Sapindus saponaria L. (Saboneteira), ambas da família Sapindaceae, sobre Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), importante praga da lavoura de milho. As folhas de milho foram imersas nos tratamentos com extratos aquosos (1% p/v) e oferecidas como alimento para as lagartas. Os resultados do período larval tais como mortalidade e peso médio foram respectivamente: para S. saponaria 63,15%, 86,65 mg; para T. esculenta 26,71%, 237,50 mg e para o controle 11,3%, 293,45 mg. A eletroforese com gelatina 0,1% mostrou duas regiões brancas muito nítidas (atividade tríptica) no intestino médio das lagartas de todos os tratamentos. Somente as lagartas do tratamento S. saponaria, apresentaram diferenças significativas, com uma atividade tríptica 10,59% menor

Soil fertility of two hundred properties in the southwest Paraná with the presence of native fruit trees

The native fruit trees are of great importance to the Southwest Region of Paraná biome, but little is known about them, especially as the soil fertility in which they are found. Such information is necessary when domestication is intended for orchards usage. The objective of this work was to collect information on the distribution of the native fruit trees in relation to the chemical characteristics of the soil in which they are found, in four municipalities of the Phytophysiognomy Forest and Araucária (DoisVizinhos, Itapejara do Oeste, Verê and São Jorge d'Oeste). The chemical soil characterization for the native fruit trees were applied in the species of jaboticaba tree (Plinia sp.), Surinam cherry tree (Eugenia uniflora L.), sete-capote tree [Campomanesia guazumifolia (Cambess.) O. Berg], cereja-do-mato tree (Eugenia involucrata DC.), guabiroba tree (Campomanesia xanthocarpa Berg), guabiju tree (Myrcianthes pungens), feijoa tree [Acca selowiana (O. Berg) Burret], uvaia tree (E. pyriformis Cambess), yellow and red araça trees (Psidium cattleyanum Sabine). The soil was collected in two hundred properties with the presence of at least some native fruit of natural occurrence, in order to obtain information about the chemical soil characteristics with native fruit presence. In general, only where the native fruits are present, they present weakly acid reaction and high organic matter, calcium, magnesium, phosphorus and potassium, as high CTC