2,812 research outputs found
Constraining neutrino mass in dynamical dark energy cosmologies with the logarithm parametrization and the oscillating parametrization
We constrain two dynamical dark energy models that are parametrized by the
logarithm form of
and the oscillating form of
. Comparing with
the Chevallier-Polarski-Linder (CPL) model, the two parametrizations for dark
energy can explore the whole evolution history of the universe properly. Using
the current mainstream observational data including the cosmic microwave
background data and the baryon acoustic oscillation data as well as the type Ia
supernovae data, we perform the statistic analysis to global fit these
models, finding that the logarithm parametrization and the oscillating
parametrization are almost as well as the CPL scenario in fitting these data.
We make a comparison for the impacts of the dynamical dark energy on the
cosmological constraints on the total mass of active neutrinos. We find that
the dark energy properties could significantly change the fitting results of
neutrino mass. Looser constraints on are obtained in the
logarithm and oscillating models than those derived in the CPL model.
Consideration of the possible mass ordering of neutrinos reveals that the most
stringent constraint on appears in the degenerate hierarchy
case
Modified Glucose-Insulin-Potassium Regimen Provides Cardioprotection With Improved Tissue Perfusion in Patients Undergoing Cardiopulmonary Bypass Surgery
Background Laboratory studies demonstrate glucose-insulin-potassium (GIK) as a potent cardioprotective intervention, but clinical trials have yielded mixed results, likely because of varying formulas and timing of GIK treatment and different clinical settings. This study sought to evaluate the effects of modified GIK regimen given perioperatively with an insulin-glucose ratio of 1:3 in patients undergoing cardiopulmonary bypass surgery. Methods and Results In this prospective, randomized, double-blinded trial with 930 patients referred for cardiac surgery with cardiopulmonary bypass, GIK (200 g/L glucose, 66.7 U/L insulin, and 80 mmol/L KCl) or placebo treatment was administered intravenously at 1 mL/kg per hour 10 minutes before anesthesia and continuously for 12.5 hours. The primary outcome was the incidence of in-hospital major adverse cardiac events including all-cause death, low cardiac output syndrome, acute myocardial infarction, cardiac arrest with successful resuscitation, congestive heart failure, and arrhythmia. GIK therapy reduced the incidence of major adverse cardiac events and enhanced cardiac function recovery without increasing perioperative blood glucose compared with the control group. Mechanistically, this treatment resulted in increased glucose uptake and less lactate excretion calculated by the differences between arterial and coronary sinus, and increased phosphorylation of insulin receptor substrate-1 and protein kinase B in the hearts of GIK-treated patients. Systemic blood lactate was also reduced in GIK-treated patients during cardiopulmonary bypass surgery. Conclusions A modified GIK regimen administered perioperatively reduces the incidence of in-hospital major adverse cardiac events in patients undergoing cardiopulmonary bypass surgery. These benefits are likely a result of enhanced systemic tissue perfusion and improved myocardial metabolism via activation of insulin signaling by GIK. Clinical Trial Registration URL: clinicaltrials.gov. Identifier: NCT01516138
Hybrid Multi-Attribute Decision Making Methods: An Application
The location selection of warehouses is considered to be a strategic decision for logistics enterprises in improving the quality of logistic services. In order to improve the science and accuracy of enterprise warehouse location decisions, in terms of hybrid multi-attribute decision-making problems and decision-maker expectations, this paper proposes an analytical method for site selection decisions of logistics enterprise warehousing centres based on the cumulative prospect theory. The research results demonstrate that the decision matrix with three information types, namely clear number, interval number and language phrase is transformed into a decision matrix with a consistent measure effect, which improves the accuracy of attribute representation. Moreover, the factors influencing the decision-making of warehouse locations with different attributes are endowed with subjective expectations, which can better adapt to the different needs and preferences of decision-makers. The results indicate that strategic ranking of decision-making schemes can be obtained by introducing a cumulative foreground theory to establish the value matrix relative to the reference point as well as calculating the comprehensive foreground value of each scheme. The effectiveness of this analytical method is proven with the use of certain feasible and effective examples
Tris(5,6-dimethyl-1H-benzimidazole-κN 3)(pyridine-2,6-dicarboxylato-κ3 O 2,N,O 6)nickel(II)
The title mononuclear complex, [Ni(C7H3NO4)(C9H10N2)3], shows a central NiII atom which is coordinated by two carboxylate O atoms and the N atom from a pyridine-2,6-dicarboxylate ligand and by three N atoms from different 5,6-dimethyl-1H-benzimidazole ligands in a distorted octahedral geometry. The crystal structure shows intermolecular N—H⋯O hydrogen bonds
Tris(1H-benzimidazole-κN 3)(pyridine-2,6-dicarboxylato-κ3 O 2,N,O 6)nickel(II)
In the title complex, [Ni(C7H3NO4)(C7H6N2)3], the NiII ion is coordinated by two carboxylate O atoms and the N atom from a pyridine-2,6-dicarboxylate ligand and by three N atoms from three benzimidazole ligands to form a slightly distorted octahedral geometry. In the crystal, molecules are linked by N—H⋯O hydrogen bonds to form a three-dimensional network
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