Continuous Uniform Finite Time Stabilization of Planar Controllable Systems

Continuous homogeneous controllers are utilized in a full state feedback setting for the uniform finite time stabilization of a perturbed double integrator in the presence of uniformly decaying piecewise continuous disturbances. Semiglobal strong $\mathcal{C}^1$ Lyapunov functions are identified to establish uniform asymptotic stability of the closed-loop planar system. Uniform finite time stability is then proved by extending the homogeneity principle of discontinuous systems to the continuous case with uniformly decaying piecewise continuous nonhomogeneous disturbances. A finite upper bound on the settling time is also computed. The results extend the existing literature on homogeneity and finite time stability by both presenting uniform finite time stabilization and dealing with a broader class of nonhomogeneous disturbances for planar controllable systems while also proposing a new class of homogeneous continuous controllers

Патофизиологические аспекты гипероксии в практике анестезиолога реаниматолога (мини-обзор)

The aim of the review is to present potentially negative effects of hyperoxia in various groups of critically ill patients, including those after cardiac arrest, brain injury or stroke, and in cases of sepsis. It was noted that in cases of these pathological processes and nosological forms there were evidences that hyperoxia could have a damaging effect, and that oxygen should be prescribed on an individual basis depending on the assessment of the current oxy- gen requirement. It has been established that hyperoxia commonly represent the last reserve to abrogate the progressive hypoxia. The mechanisms of adaptation of the body to hyperoxia are described and the possibility to reduce the toxic effects of oxygen with the aid of succinates is discussed. Цель обзора — представить потенциально негативные эффекты гипероксии у различных групп боль- ных, находящихся в критическом состоянии, в том числе после остановки сердца, черепно-мозговой трав- мы, инсульта, в случаях развития сепсиса. Приведены доказательства повреждающего эффекта гипероксии и необходимости индивидуального использования кислорода в соответствии с текущей потребностью при ряде патологических процессов и нозологических форм. Описаны механизмы адаптации организма к гипероксии и возможность уменьшения токсических эффектов кислорода с помощью сукцинатов.

Design, Performance, and Calibration of CMS Hadron Endcap Calorimeters

Detailed measurements have been made with the CMS hadron calorimeter endcaps (HE) in response to beams of muons, electrons, and pions. Readout of HE with custom electronics and hybrid photodiodes (HPDs) shows no change of performance compared to readout with commercial electronics and photomultipliers. When combined with lead-tungstenate crystals, an energy resolution of 8\% is achieved with 300 GeV/c pions. A laser calibration system is used to set the timing and monitor operation of the complete electronics chain. Data taken with radioactive sources in comparison with test beam pions provides an absolute initial calibration of HE to approximately 4\% to 5\%

Pathophysiological Aspects of Hyperoxia in Anesthesiologist-Reanimatologist's Practice

The aim of the review is to present potentially negative effects of hyperoxia in various groups of critically ill patients, including those after cardiac arrest, brain injury or stroke, and in cases of sepsis. It was noted that in cases of these pathological processes and nosological forms there were evidences that hyperoxia could have a damaging effect, and that oxygen should be prescribed on an individual basis depending on the assessment of the current oxy- gen requirement. It has been established that hyperoxia commonly represent the last reserve to abrogate the progressive hypoxia. The mechanisms of adaptation of the body to hyperoxia are described and the possibility to reduce the toxic effects of oxygen with the aid of succinates is discussed