13 research outputs found
Gradient NLW on curved background in 4+1 dimensions
We obtain a sharp local well-posedness result for the Gradient
Nonlinear Wave Equation on a nonsmooth curved background. In the process we
introduce variable coefficient versions of Bourgain's spaces, and use
a trilinear multiscale wave packet decomposition in order to prove a key
trilinear estimate
Special lifting and transport solutions for heavy and complex loads in the design of the lifting frame
Approach and reasoning for developing new solutions and lifting methods, effectively manage risk. This comes in various forms, primarily reducing risk to staff and secondary, reducing or eliminating risk to plants and customers. This is why front-loading engineering solutions are being developed that provide improved safety, schedule improvement and cost efficiency. The paper presents solutions for lifting and transport systems in which alternative methods are used
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Gradient NLW on curved background in 4+1 dimensions
We obtain a sharp local well-posedness result for the Gradient
Nonlinear Wave Equation on a nonsmooth curved background. In the process we
introduce variable coefficient versions of Bourgain's spaces, and use
a trilinear multiscale wave packet decomposition in order to prove a key
trilinear estimate
Special lifting and transport solutions for heavy and complex loads in the design of the lifting frame
Approach and reasoning for developing new solutions and lifting methods, effectively manage risk. This comes in various forms, primarily reducing risk to staff and secondary, reducing or eliminating risk to plants and customers. This is why front-loading engineering solutions are being developed that provide improved safety, schedule improvement and cost efficiency. The paper presents solutions for lifting and transport systems in which alternative methods are used
Statistical Analysis and Optimization of the Brilliant Red HE-3B Dye Biosorption onto a Biosorbent Based on Residual Biomass
Using various techniques, natural polymers can be successfully used as a matrix to immobilize a residual microbial biomass in a form that is easy to handle, namely biosorbents, and which is capable of retaining chemical species from polluted aqueous media. The biosorption process of reactive Brilliant Red HE-3B dye on a new type of biosorbent, based on a residual microbial biomass of Saccharomyces pastorianus immobilized in sodium alginate, was studied using mathematical modeling of experimental data obtained under certain conditions. Different methods, such as computer-assisted statistical analysis, were applied, considering all independent and dependent variables involved in the reactive dye biosorption process. The optimal values achieved were compared, and the experimental data supported the possibility of using the immobilized residual biomass as a biosorbent for the studied reference dye. The results were sufficient to perform dye removals higher than 70–85% in an aqueous solution containing around 45–50 mg/L of reactive dye, and working with more than 20–22 g/L of prepared immobilized microbial biosorbent for more than 9.5–10 h. Furthermore, the proposed models agreed with the experimental data and permitted the prediction of the dye biosorption behavior in the experimental variation field of each independent variable
Correction: Outcomes after stenting of renal artery stenosis in patients with high-risk clinical features
Outcomes after stenting of renal artery stenosis in patients with high-risk clinical features
Abstract Background In patients with renal artery stenosis, revascularization was seen as a mean to improve outcomes, but large studies failed to show significant benefit in general population. However, data on benefits of renal artery stenting in patients with high-risk features, such as rapidly declining renal function and cardiac destabilization syndromes, are limited, as they were excluded from trials. In this descriptive study, we aimed to evaluate short- and long-term outcomes in high-risk patients with renal artery stenosis, treated by angioplasty and stenting. We have retrospectively interrogated our local databases for renal artery percutaneous interventions; patients at high-risk (rapidly declining renal function; stable chronic renal failure and bilateral renal artery disease; severe hypertensive crisis) were selected for the current analysis. Results Of 30 patients undergoing renal artery stenting, 18 patients were deemed "high-risk." On short term, good in-hospital control of hypertension and cardiac stabilization were obtained in all patients. Renal function improved significantly only in patients admitted with rapidly declining renal function, with significant creatinine level fall from median 3.98 mg/dL to 2.02 mg/dL, p = 0.023. However, for the whole group, creatinine change was non-significant (− 0.12 mg/dL, p = NS). On the long term, five patients (27.8%) ended-up on chronic hemodialysis and six patients died (33.3%) after a median of 20 months. No death occurred during the first year after the procedure. Conclusions Percutaneous procedures are feasible and safe in patients with high-risk renal artery stenosis, especially in those with rapidly declining renal function, probably saving some of them from the immediate need for renal replacement therapy, but long-term results are negatively influenced by the precarious general and cardio-vascular status of these patients and by the pre-existing significant renal parenchymal disease, non-related to the renal artery stenosis