2,331 research outputs found
Duality cascade of softly broken supersymmetric theories
We study the duality cascade of softly broken supersymmetric theories. We
investigate the renormalization group (RG) flow of SUSY breaking terms as well
as supersymmetric couplings. It is found that the magnitudes of SUSY breaking
terms are suppressed in most regimes of the RG flow through the duality
cascade. At one stage of cascading, the gaugino mass of the strongly coupled
sector and scalar masses converge to certain values, which are determined by
the gauge coupling and the gaugino mass of the weakly coupled sector. At the
next stage, the strongly and weakly coupled sectors are interchanged with each
other. We also show the possibility that cascading would be terminated by the
gauge symmetry breaking, which is induced by the so-called B-term.Comment: 25 pages, 5 figure
Experimental and theoretical study of free-free electron-helium scattering in a CO2 laser field
International audienceFree-free transitions during the scattering of electrons by helium in the presence of a linearly polarized CO2 laser field are investigated both experimentally and theoretically. Signals for laser-assisted scattering at 22 eV with absorption or emission of up to two photons are measured at scattering angles between 20° and 70°, and are compared to the values obtained from an 11-state R-matrix Floquet calculation and from the low-frequency approximation of Kroll and Watson. The two sets of theoretical results are found to be in very good agreement for the scattering geometries considered in the experiment. The order of magnitude of the experimental results is reproduced by calculations with intensities in the region of 107 W cm-2. Agreement is improved by averaging the theoretical results over the spatial distributions of the three beams as well as the temporal intensity profile of the laser pulse, and by allowing for some misalignment of the three beams in the experiment
Lowering Effects of Onion Intake on Oxidative Stress Biomarkers in Streptozotocin-Induced Diabetic Rats
The protective effect of onion against oxidative stress in streptozotosin-induced diabetic rats was investigated in comparison with that of quercetin aglycone. We measured oxidative stress biomarkers involving the susceptibility of the plasma against copper ion-induced lipid peroxidation, which was estimated by the amounts of thiobarbituric acid-reactive substances (TBARS) and cholesteryl ester hydroperoxides, and urine TBARS and 8-hydroxydeoxyguanosine contents. After the 12-week feeding period, plasma glucose levels and these biomarkers increased in diabetic rats compared to normal rats. In diabetic rats fed a 6.0% onion diet (quercetin equivalent: 0.023%), quercetin metabolites accumulated in the plasma at concentrations of approximately 35 µM. Onion intake decreased plasma glucose levels and lowered the oxidative stress biomarkers. On the other hand, quercetin metabolites in the plasma of rats fed a diet with 0.023% quercetin aglycone were found at lower concentrations (14.2 µM) than the rats fed the onion diet. Furthermore, oxidative stress biomarkers were higher in the quercetin diet group compared to the onion diet group. These results strongly suggest that onion intake suppresses diabetes-induced oxidative stress more effectively than the intake of the same amount of quercetin aglycone alone
Suppressed supersymmetry breaking terms in the Higgs sector
We study the little hierarchy between mass parameters in the Higgs sector and
other SUSY breaking masses. This type of spectrum can relieve the fine-tuning
problem in the MSSM Higgs sector. Our scenario can be realized by
superconformal dynamics. The spectrum in our scenario has significant
implications in other phenomenological aspects like the relic abundance of the
lightest neutralino and relaxation of the unbounded-from-below constraints.Comment: 14 pages, late
Detonation Initiation via Imploding Shock Waves
An imploding annular shock wave driven by a jet of air was used to initiate detonations
inside a 76 mm diameter tube. The tube was filled with a test gas composed of either
stoichiometric ethylene-oxygen or propane-oxygen diluted with nitrogen. The strength of
the imploding shock wave and the sensitivity of the test gas were varied in an effort to
find the minimum shock strength required for detonation of each test mixture. The results
show that the minimum required shock strength increases with mixture sensitivity and
suggest that impractically large shock driver pressures are required to initiate detonations
in ethylene-air or propane-air mixtures when using this technique
Manuseio e aplicação de defensivos agrÃcolas em meloeiro.
O Nordeste brasileiro é responsável por 94% da produção nacional de melão (Cucumis melo L.), e grande parte dessa produção concentra-se nos pólos irrigados do Vale do Mossoró/Açu, no Rio Grande do Norte e no Baixo Jaguaribe, no Ceará. Os produtores dessas regiões praticam uma agricultura altamente tecnificada e utilizam grande quantidade de defensivos agrÃcolas para controlar pragas e fitopatógenos que ocorrem nas lavouras
Manejo integrado de doenças do meloeiro.
Principais doenças do meloeiro; Manejo integrado de doenças; Normas técnicas e especÃficas para a produção integrada de melão
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