Resolving the nature of electronic excitations in resonant inelastic x-ray scattering

The study of elementary bosonic excitations is essential toward a complete description of quantum electronic solids. In this context, resonant inelastic X-ray scattering (RIXS) has recently risen to becoming a versatile probe of electronic excitations in strongly correlated electron systems. The nature of the radiation-matter interaction endows RIXS with the ability to resolve the charge, spin and orbital nature of individual excitations. However, this capability has been only marginally explored to date. Here, we demonstrate a systematic method for the extraction of the character of excitations as imprinted in the azimuthal dependence of the RIXS signal. Using this novel approach, we resolve the charge, spin, and orbital nature of elastic scattering, (para-)magnon/bimagnon modes, and higher energy dd excitations in magnetically-ordered and superconducting copper-oxide perovskites (Nd2CuO4 and YBa2Cu3O6.75). Our method derives from a direct application of scattering theory, enabling us to deconstruct the complex scattering tensor as a function of energy loss. In particular, we use the characteristic tensorial nature of each excitation to precisely and reliably disentangle the charge and spin contributions to the low energy RIXS spectrum. This procedure enables to separately track the evolution of spin and charge spectral distributions in cuprates with doping. Our results demonstrate a new capability that can be integrated into the RIXS toolset, and that promises to be widely applicable to materials with intertwined spin, orbital, and charge excitations

Construction of self in a support group for people with eating disorders

Este estudo teve como objetivo compreender a construção de si mesmo a partir do discurso de pessoas diagnosticadas com anorexia e bulimia, participantes de um grupo de apoio psicológico. Participaram 14 jovens atendidas em um serviço público de saúde de um hospital universitário. A partir do referencial histórico-cultural bakhtiniano, analisaram-se qualitativamente as transcrições audiogravadas de 10 sessões consecutivas do grupo. Constatou-se que os discursos produzidos socialmente sobre os transtornos alimentares são evocados nas falas das participantes e encontram no grupo um espaço para que possam ser contestados, negociados ou aceitos, promovendo a desconstrução de mitos erigidos em torno da enfermidade. A análise empreendida aponta o grupo como uma ferramenta terapêutica significativa para a produção de novos sentidos, não patologizantes com relação aos transtornos alimentares e seus portadores.The aim of this study was to understand the discursive constructions of self, made by people diagnosed with anorexia and bulimia, who were participating in a psychological support group. Fourteen young women, who were being attended to in a psychological support group in a public health service at a university hospital, took part in the study. Ten consecutive weekly group sessions were selected and qualitatively analyzed using Bakhtin's historical and cultural approach. Commonly held beliefs about eating disorders were evoked in the participants' words, and were refuted, negotiated, or accepted in the group, furthering the deconstruction of myths about the disorders. The analysis highlights the importance of support groups as a therapeutic tool that enables the production of new, non-pathological approaches to eating disorders and the people diagnosed with them

Adenocarcinoma classification: patterns and prognosis

Lung cancer is the most frequent human malignancy and the principal cause of cancer-related death worldwide. Adenocarcinoma is now the main histologic type, accounting for almost half of all the cases. The 2015 World Health Organization has adopted the classification recently developed by the International Association for the Study of Lung Cancer, American Thoracic Society, and European Respiratory Society. This new adenocarcinoma classification has incorporated up-to-date advances in radiological, molecular and oncological knowledge, providing univocal diagnostic criteria and terminology. For resection specimens, new entities have been defined such as adenocarcinoma in situ and minimally invasive adenocarcinoma to designate adenocarcinomas, mostly nonmucinous and ≤ 3 cm in size, with either pure lepidic growth or predominant lepidic growth with ≤ 5 mm invasion, respectively. For invasive adenocarcinoma, the new classification has introduced histological subtyping according to the predominant pattern of growth of the neoplastic cells: lepidic (formerly non mucinous brochioloalveolar adenocarcinoma), acinar, papillary, micropapillary, and solid. Of note, micropapillary pattern is a brand new histologic subtype. In addition, four variants of invasive adenocarcinoma are recognized, namely invasive mucinous (formerly mucinous brochioloalveolar adenocarcinoma), colloid, fetal, and enteric. Importantly, three variants that were considered in the previous classification have been eliminated, specifically mucinous cystadenocarcinoma, signet ring cell, and clear cell adenocarcinoma. This review presents the changes introduced by the current histological classification of lung adenocarcinoma and its prognostic implications

Mastectomized women's experiences and discourses: negotiations and challenges of breast cancer

O presente artigo investiga as experiências de mulheres mastectomizadas tais como estas se presentificam em seus discursos sobre a vivência do câncer de mama, bem como suas estratégias de negociação dos desafios da doença. Foram analisadas 11 sessões de um grupo de apoio ocorridas em um serviço de atendimento público. A partir da análise temática das sessões, com o auxílio dos princípios do dialogismo e da polifonia, a partir do referencial histórico-cultural, pôde ser percebida a oposição entre o saber científico ("sentença" médica) e o saber popular (possibilidade de cura), bem como a questão do estigma social associado ao câncer e ao gênero feminino. O grupo constituiu-se como um espaço para que esses diferentes saberes se atualizassem e fossem transmitidos, refletindo uma construção coletiva das ideias em torno do câncer, o que permitiu ressignificar os modos de enfrentamento e as diversas vivências relacionadas à doença.This article investigates the mastectomized women's experiences and discourses about breast cancer, and also their strategies of negociation about the disease's challenges. 11 sessions of a support group for these women, carried out in a public service, were analyzed. The sessions were analyzed using thematic analysis and the dialogism and polyphony notions, within an historical and cultural approach that showed the opposition between the scientific knowledge (medical verdict) and the popular knowledge (possibility of cure), also the social stigma of the disease and the feminine gender . The group offered the setting for different knowledge to be updated and conveyed, reflecting a joint construction of the ideas about cancer and giving new meanings to facing and living with the disease

Public Conversations Group as Resource Against LGBT Violence

El aumento de la violencia contra LGBTs (lesbianas, gays, bisexuales, travestis, transexuales y transgéneros) en Brasil incentiva la adopción de estrategias preventivas, entre ellas el Proyecto Conversaciones Públicas (PCP), metodología para grupos en conflictos. Este estudio tuvo por objetivo analizar el proceso grupal del PCP, con foco en los efectos de la estructura de la conversación en las interacciones emprendidas. Se realizaron tres encuentros con el total de 13 participantes involucrados en la temática de la violencia contra LGBT. Los encuentros fueron grabados en audio y los discursos analizados según el construccionismo social. El PCP se mostró útil para pensar una confrontación más humana con la diferencia a favor de un interés ético. Es posible afirmar que la creación de un modo diferente de conversación coincidió con la emergencia de nuevas maneras de actuar. Los efectos de estos encuentros deben ser acompañados adelante, así como disparar reflexiones para políticas públicas de atención a LGBT.The increase in violence against LGBT people (lesbian, gay, bisexual, transvestite, transgender and transgender) in Brazil encourages the adoption of preventive strategies, among them the Public Conversations Project (PCP), methodology for groups in conflicts. This study aimed to analyze the group process of the PCP, focusing on the effects of the structure of the conversation in the interactions undertaken. There were three meetings with a total of 13 participants involved in the issue of violence against LGBT people. The meetings were audio-taped, and the speeches analyzed according to social constructionism. The PCP has proved useful to think of a more human confrontation with the difference in favor of an ethical interest. It was possible to say that the creation of a different way of talking coincided with the emergence of new ways of acting. The effects of these meetings should be observed longitudinally, as well as trigger reflections for public policies of attention to LGBT.O aumento da violência contra LGBTs (lésbicas, gays, bissexuais, travestis, transexuais e transgêneros) no Brasil incentiva a adoção de estratégias preventivas, entre elas o Projeto Conversações Públicas (PCP), metodologia para grupos em conflitos. Este estudo teve por objetivo analisar o processo grupal do PCP, com foco nos efeitos da estrutura da conversa nas interações empreendidas. Realizaram-se três encontros com o total de 13 participantes envolvidos com a temática da violência a LGBTs. Os encontros foram audiogravados e os discursos analisados segundo o construcionismo social. O PCP mostrou-se útil para se pensar um confronto mais humano com a diferença em prol de um interesse ético. Foi possível afirmar que a criação de um modo diferente de conversar coincidiu com a emergência de novas maneiras de agir. Os efeitos desses encontros devem ser acompanhados longitudinalmente, bem como disparar reflexões para políticas públicas de atenção a LGBTs

Charge order driven by Fermi-arc instability in Bi2201

The understanding of the origin of superconductivity in cuprates has been hindered by the apparent diversity of intertwining electronic orders in these materials. We combined resonant x-ray scattering (REXS), scanning-tunneling microscopy (STM), and angle-resolved photoemission spectroscopy (ARPES) to observe a charge order that appears consistently in surface and bulk, and in momentum and real space within one cuprate family, Bi2201. The observed wave vectors rule out simple antinodal nesting in the single-particle limit but match well with a phenomenological model of a many-body instability of the Fermi arcs. Combined with earlier observations of electronic order in other cuprate families, these findings suggest the existence of a generic charge-ordered state in underdoped cuprates and uncover its intimate connection to the pseudogap regime.Comment: A high resolution version can be found at http://www.phas.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/Bi2201_CDW_REXS_STM.pdf

Orchard Day, August 18, 1955; Results of Fruit Research

Storing peaches / Donald Comin -- Trends in storages / Donald Comin -- Grape varieties ; Grape soil management and fertilization ; Nitrogen fertilizers for apple trees / J. M. Beattie -- Colorset on Golden Delicious and Grimes ; Planting distance influence on yield of apples ; Harvest dates for apples ; Summer varieties of apples ; Pre-harvest spraying for Baldwin / C. W. Ellenwood -- Peach investigations ; The blueberry planting ; Strawberry studies ; Plum varieties and culture ; Grape weed control studies / R. G. Hill, Jr. -- Semi-dwarf apple trees in Ohio / Freeman S. Howlett and T. E. Fowler -- The Franklin Apple / Freeman S. Howlett and C. W. Ellenwood -- Status of intermediate (trunk-forming) stocks for the apple ; Pruning the newly planted apple tree ; Status of the pear industry in Ohio / Freeman S. Howlett -- Pear variety collection indicates several deserve limited trial / Freeman S. Howlett and C. W. Ellenwoo

The symmetry of charge order in cuprates

Charge-ordered ground states permeate the phenomenology of 3d-based transition metal oxides, and more generally represent a distinctive hallmark of strongly-correlated states of matter. The recent discovery of charge order in various cuprate families fueled new interest into the role played by this incipient broken symmetry within the complex phase diagram of high-Tc superconductors. Here we use resonant X-ray scattering to resolve the main characteristics of the charge-modulated state in two cuprate families: Bi2201 and YBCO. We detect no signatures of spatial modulations along the nodal direction in Bi2201, thus clarifying the inter-unit-cell momentum-structure of charge order. We also resolve the intra-unit-cell symmetry of the charge ordered state, which is revealed to be best represented by a bond-order with modulated charges on the O-2p orbitals and a prominent d-wave character. These results provide insights on the microscopic description of charge order in cuprates, and on its origin and interplay with superconductivity.Comment: A high-resolution version with supplementary material can be found at: http://www.phas.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/CDW_symmetry.pd