13 research outputs found
Matrix Models, Monopoles and Modified Moduli
Motivated by the Dijkgraaf-Vafa correspondence, we consider the matrix model
duals of N=1 supersymmetric SU(Nc) gauge theories with Nf flavors. We
demonstrate via the matrix model solutions a relation between vacua of theories
with different numbers of colors and flavors. This relation is due to an N=2
nonrenormalization theorem which is inherited by these N=1 theories.
Specializing to the case Nf=Nc, the simplest theory containing baryons, we
demonstrate that the explicit matrix model predictions for the locations on the
Coulomb branch at which monopoles condense are consistent with the quantum
modified constraints on the moduli in the theory. The matrix model solutions
include the case that baryons obtain vacuum expectation values. In specific
cases we check explicitly that these results are also consistent with the
factorization of corresponding Seiberg-Witten curves. Certain results are
easily understood in terms of M5-brane constructions of these gauge theories.Comment: 27 pages, LaTeX, 2 figure
Monitoramento da biodeterioração da madeira de trĂȘs espĂ©cies amazĂŽnicas pela tĂ©cnica da colorimetria
Two cases of internal carotid artery occlusion due to blunt head trauma
[No abstract available
Acute Alterations in Biochemistry, Morphology and Contractility of Rat Isolated Urinary Bladder via Increased Intra-Abdominal Pressure
Caracterização da matriz orgĂąnica de resĂduos de origens diversificadas Characterization of the organic matrix of residues from different origins
VĂĄrios fatores controlam a velocidade de decomposição e a liberação de nutrientes por resĂduos orgĂąnicos. Dentre esses fatores, destacam-se o grau de humificação e a natureza quĂmica dos resĂduos. Com este trabalho, objetivou-se caracterizar a matriz orgĂąnica de amostras de lodo de esgoto, estercos de galinha, suĂno, codorna e bovino, alĂ©m de composto, substrato orgĂąnico e material hĂșmico comerciais. Analisaram-se o pH, condutividade elĂ©trica (CE), capacidade de troca de cĂĄtions (CTC), capacidade de retenção de ĂĄgua (CRA), teores de N total e N-mineral, matĂ©ria orgĂąnica, carbono orgĂąnico total (COT) e as fraçÔes de COT: C-fração ĂĄcido hĂșmico (C-FAH), C-fração ĂĄcido fĂșlvico (C-FAF), C solĂșvel em ĂĄgua (CSA), C lĂĄbil e teor e diversidade de ĂĄcidos orgĂąnicos de baixa massa molar (AOBMM). Quanto maior o teor de C-fração ĂĄcido hĂșmico, mais elevada Ă© a capacidade de adsorver cĂĄtions dos resĂduos orgĂąnicos. Considerando-se o Ăndice de humificação (IH), a razĂŁo de humificação (RH) e a CTC, e seus respectivos valores crĂticos (19 %, 28 % e 67 cmol c kg-1) para separar materiais decompostos daqueles suscetĂveis Ă decomposição, os estercos de suĂno, bovino, galinha e codorna, a amostra de composto e o lodo de esgoto 1 podem ser classificados como resĂduos ainda nĂŁo completamente humificados. O C lĂĄbil nĂŁo foi adequado para predizer a biodisponibilidade dos resĂduos avaliados. Os estercos de galinha e de codorna foram os materiais mais ricos em ĂĄcidos orgĂąnicos de baixa massa molar.<br>The humification degree and the chemical nature of organic residues are essential factors controlling their degradation and nutrient release. To characterize the organic matrix, samples of sewage sludge, poultry, pig, cattle and quail manure, besides commercial compost, organic substrate and humic material were analyzed for: pH, electric conductivity, cation exchange capacity (CEC), water retention capacity, concentration of total N and mineral N, organic matter, total organic carbon (TOC) and the TOC fractions: humic acid C-fraction; fulvic acid C-fraction, water soluble C, labile-C and concentration and diversity of low mass molecular organic acids. The higher the humic acid C-fraction content, the greater was the CEC of the organic residues. Based on the humification index (HI), humification ratio (HR), the CEC and their respective critical values (19 %, 28 % and 67 cmol c kg-1), to separate decomposed material from material in decomposition, the pig, cattle, poultry and quail manures and the organic compost and sludge sewage 1 were classified as not completely decomposed residues. Labile-C was not appropriate to predict the bioavailability of the studied residues. The concentration of low molecular weight organic acids was higher in poultry and quail manure
Simulation of 4d N=1 supersymmetric Yang Mills theory with Symanzik improved gauge action and stout smearing
We report on the results of a numerical simulation concerning the low-lying
spectrum of four-dimensional N=1 SU(2) Supersymmetric Yang-Mills (SYM) theory
on the lattice with light dynamical gluinos. In the gauge sector the tree-level
Symanzik improved gauge action is used, while we use the Wilson formulation in
the fermion sector with stout smearing of the gauge links in the Wilson-Dirac
operator. The ensembles of gauge configurations were produced with the Two-Step
Polynomial Hybrid Monte Carlo (TS-PHMC) updating algorithm. We performed
simulations on large lattices up to a size of 24^3 x 48 at . Using
QCD units with the Sommer scale being set to r_0 = 0.5 fm, the lattice spacing
is about a ~ 0.09 fm, and the spatial extent of the lattice corresponds to 2.1
fm. At the lightest simulated gluino mass the spin-1/2 gluino-glue bound state
appeared to be considerably heavier than its expected super-partner, the
pseudoscalar bound state. Whether supermultiplets are formed remains to be
studied in upcoming simulations.Comment: 17 pages, 8 figures (eps), LaTeX2