A perturbative approach to the quantum elliptic Calogero-Sutherland model

We solve perturbatively the quantum elliptic Calogero-Sutherland model in the regime in which the quotient between the real and imaginary semiperiods of the Weierstrass ${\cal P}$ function is smallComment: 6 pages, no figure

Generating functions and multiplicity formulas: the case of rank two simple Lie algebras

A procedure is described that makes use of the generating function of characters to obtain a new generating function $H$ giving the multiplicities of each weight in all the representations of a simple Lie algebra. The way to extract from $H$ explicit multiplicity formulas for particular weights is explained and the results corresponding to rank two simple Lie algebras shown

Explicit computations of low lying eigenfunctions for the quantum trigonometric Calogero-Sutherland model related to the exceptional algebra E7

In the previous paper math-ph/0507015 we have studied the characters and Clebsch-Gordan series for the exceptional Lie algebra E7 by relating them to the quantum trigonometric Calogero-Sutherland Hamiltonian with coupling constant K=1. Now we extend that approach to the case of general K

Enhanced Dechlorination of 1,2-Dichloroethane by Coupled Nano Iron-Dithionite Treatment

1,2-dichloroethane (1,2-DCA) is a chlorinated solvent classified as a probable human carcinogen. Due to its extensive industrial applications, widespread contamination and recalcitrance towards abiotic dechlorination, 1,2-DCA remains a challenging compound for the remediation community and one of the great research interests. Batch experiments combining bimetallic or monometallic nZVI (stabilized or non-stabilized) with sodium dithionite were conducted for the degradation of 1,2-DCA. These experiments have yielded up to 92 % degradation of the initial 1,2-DCA concentration over the course of a year. Observed pseudo-first order rate constants (kobs) range from 3.8 x 10-3 to 7.8 x 10-3 day-1. Degradation was also achieved using magnetite and iron sulfide as the metal surface, with kobs values of 6.2 x 10-3 and 4.7 x 10-3 day-1, respectively. Characterization analysis of the nZVI/dithionite nanoparticles shows that zero valent iron as such remains in solution after more than one year of reactivity and that iron sulfide is formed in solution. This novel treatment represents the first nZVI-based formulation to achieve nearly complete degradation of 1,2-DCA

Field-Scale Implementation of Sulfidated Nano Zerovalent Iron for In-Situ Remediation

As far back as the mid-1990s, biogenic sulfidation has been observed during the implementation of iron-based materials for groundwater remediation. This phenomenon has largely been a consequence of natural biogeochemical processes and the prospects of utilizing engineered sulfidated zerovalent iron (ZVI) particles – nano- and/or micro- sized – were not extensively explored. More recently sulfidation of zerovalent iron (ZVI) particles has received considerable attention, highlighting the benefits that engineered/abiotic sulfidation can offer to nZVI, but to date, no field demonstration of the technology has been conducted. The first part of this thesis aims to report the unique challenges and unanswered questions that remain in relation to the emplacement of S-nZVI. nZVI was synthesized on-site using sodium borohydride (NaBH4) and stabilized with carboxymethylcellulose (CMC). Sulfidation was performed in an aqueous-solid fashion with sodium dithionite (Na2S­2O4) as the sulfidating agent. The slurry was gravity fed into a non-native sandy material by a designated injection well. Multiple monitoring wells were installed upstream and downstream of the injection well to monitor particle breakthrough and changes in the aquifer system. In terms of performance, the study suggests the on-site synthesized S-nZVI is mobile in the subsurface. Transport of S-nZVI to the monitoring wells, both downgradient and upgradient, resulted in a significant shift in aqueous phase concentrations of chlorinated volatile organic compounds (cVOCs). Compound specific isotope analysis (CSIA), changes in concentrations of intermediate degradation products, and the increase of ethene concentrations confirmed cVOC dechlorination. The field demonstration was followed by a bench – scale study on the aging characteristics and reactivity of S-nZVI. Particles were aged in dithionite immediately after synthesis (i.e., without washing). Aged S-nZVI remained reactive towards trichloroethene (TCE) after a 21-day aging period. Results from the aging study suggest particles synthesized on-site under these conditions could remain operational after extended storage. As knowledge of this growing area increases, this work presents foundational material on field-application of S-nZVI. Results from this field demonstration show sulfidation is a suitable amendment for the development of more efficient nZVI-based treatments for in-situ remediation

E-Skin Module with Heterogeneously Integrated Graphene Touch Sensors and CMOS Circuitry

This paper presents a flexible electronic skin (e-skin) module developed by heterogeneous integration of graphene based touch sensors and CMOS chips having basic capacitance-to-voltage converter (CVC) circuitry to acquire the sensor response. Graphene touch sensor was firstly transfer printed on a flexible polyvinyl chloride (PVC) substrate, thereafter the CMOS chip with 4×4 array of large transistors was integrated on the same PVC substrate. Then, resulting module was tested to verify the performance. The heterogeneous integration of graphene and Si based devices on the same flexible substrate is an interesting new approach that can be scaled up, opening a new opportunity for obtaining large area e-skin for robotic applications

Fabrication and Characterization of Multiband Solar Cells Based on Highly Mismatched Alloys

Multiband solar cells are one type of third generation photovoltaic devices in which an increase of the power conversion efficiency is achieved through the absorption of low energy photons while preserving a large band gap that determines the open circuit voltage. The ability to absorb photons from different parts of the solar spectrum originates from the presence of an intermediate energy band located within the band gap of the material. This intermediate band, acting as a stepping stone allows the absorption of low energy photons to transfer electrons from the valence band to the conduction band by a sequential two photons absorption process. It has been demonstrated that highly mismatched alloys offer a potential to be used as a model material system for practical realization of multiband solar cells. Dilute nitride GaAs1-xNx highly mismatched alloy with low mole fraction of N is a prototypical multiband semiconductor with a well-defined intermediate band. Currently, we are using chemical beam epitaxy to synthesize dilute nitride highly mismatched alloys. The materials are characterized by a variety of structural and optical methods to optimize their properties for multiband photovoltaic devices

Melhoria da Atenção aos Usuários com Hipertensão e Diabetes na Unidade Básica de Saúde Contendas, Cocal/PI

GARCIA, Joel Nunez. Melhoria da atenção aos usuários com HAS e DM na UBS Contendas, Cocal/PI. 2016. 134f. Trabalho de Conclusão de Curso (Especialização). Especialização em Saúde da Família. Universidade Aberta do SUS / Universidade Federal de Pelotas, Pelotas. A Hipertensão Arterial Sistêmica e o Diabetes Mellitus, são cada vez mais prevalentes e, constituem-se fatores de risco para doenças cardiovasculares, para o controle dessas patologias é necessário que população seja esclarecida a cerca de mudanças no estilo de vida e adesão medicamentosa, logo é imprescindível que esses usuários frequentem as Unidades Básicas de Saúde. O objetivo desta intervenção foi melhorar a atenção aos usuários com hipertensão e/ou diabetes na UBS Contendas em Cocal/PI. Foi realizada em doze semanas e as ações foram organizadas nos quatro eixos pedagógicos do curso: organização e gestão do serviço, monitoramento e avaliação, qualificação da prática clínica e engajamento público. A população alvo de nosso trabalho estava constituída por 479 usuários com hipertensão arterial sistêmica e 118 usuários com diabetes mellitus. As metas propostas para a cobertura foram de 100% dos usuários com HAS e DM que se encontravam cadastrados na Unidade Básica de Saúde. Foram cadastrados 435 (90,8%) usuários com hipertensão e 115 (97,5%) com diabetes. Destes 96 (22,1%) com hipertensão e 24 (20,9%) com diabetes estavam com exames complementares em dia, 381 (87,6%) com hipertensão e 95 (82,6%) com diabetes utilizavam medicamentos da farmácia popular, todos os cadastrados (100%) tiveram avaliação de necessidade de atendimento odontológico, os faltosos as consultas tiveram busca ativa, estavam com registros atualizados, tiveram estratificação de risco cardiovascular por exame clínico, receberam orientação nutricional, sobre a prática regular de atividade física, riscos do tabagismo e higiene bucal. Devido os bons resultados obtidos em curto período, tentamos motivar a equipe e a população a manter as melhorias obtidas e, ampliar ainda mais a cobertura e qualidade do serviço. Igualmente, esperamos que a gestão valorize e fortaleça esse trabalho, dando condições para sua continuidade. Palavras-chave: atenção primária à saúde; saúde da família; doença crônica, diabetes mellitus, hipertensão arterial sistêmic

Antimicrobial resistance characteristics and fitness of Gram-negative fecal bacteria from volunteers treated with minocycline or amoxicillin.

A yearlong study was performed to examine the effect of antibiotic administration on the bacterial gut flora. Gram-negative facultative anaerobic bacteria were recovered from the feces of healthy adult volunteers administered amoxicillin, minocycline or placebo, and changes determined in antimicrobial resistance (AMR) gene carriage. Seventy percent of the 1039 facultative anaerobic isolates recovered were identified by MALDI-TOF as Escherichia coli. A microarray used to determine virulence and resistance gene carriage demonstrated that AMR genes were widespread in all administration groups, with the most common resistance genes being bla TEM, dfr, strB, tet(A), and tet(B). Following amoxicillin administration, an increase in the proportion of amoxicillin resistant E. coli and a three-fold increase in the levels of bla TEM gene carriage was observed, an effect not observed in the other two treatment groups. Detection of virulence genes, including stx1A, indicated not all E. coli were innocuous commensals. Approximately 150 E. coli collected from 6 participants were selected for pulse field gel electrophoresis (PFGE), and a subset used for characterisation of plasmids and Phenotypic Microarrays (PM). PFGE indicated some E. coli clones had persisted in volunteers for up to 1 year, while others were transient. Although there were no unique characteristics associated with plasmids from persistent or transient isolates, PM assays showed transient isolates had greater adaptability to a range of antiseptic biocides and tetracycline; characteristics which were lost in some, but not all persistent isolates. This study indicates healthy individuals carry bacteria harboring resistance to a variety of antibiotics and biocides in their intestinal tract. Antibiotic administration can have a temporary effect of selecting bacteria, showing co-resistance to multiple antibiotics, some of which can persist within the gut for up to 1 year