35 research outputs found
Operation states analysis of the series-parallel resonant converter working above resonance frequency
Operation states analysis of a series-parallel converter working above resonance frequency is described in the
paper. Principal equations are derived for individual operation states. On the basis of them the diagrams are made out. The
diagrams give the complex image of the converter behaviour for individual circuit parameters. The waveforms may be
utilised at designing the inverter individual parts
Operation analysis of the series-parallel resonant converter working above resonance frequency
The present article deals with theoretical analysis of operation of a series-parallel converter working above
resonance frequency. Derived are principal equations for individual operation intervals. Based on these made out are
waveforms of individual quantities during both the inverter operation at load and no-load operation. The waveforms may be
utilised at designing the inverter individual parts
Leukemia in akr mice. Iii. Size distribution of suppressor t-cells in akr leukemia and neonatal mice.
Cough reflex sensitivity in adolescents with diabetic autonomic neuropathy
Abstract Objective Diabetic autonomic neuropathy (DAN) is one of the chronic complications of diabetes mellitus which can involve one or more organ systems. DAN without apparent symptoms is more often in childhood and adolescence. While heart rate variability (HRV) and Ewing's battery of cardiovascular tests are regarded as a gold standard for the diagnosis of DAN, the examination of cough reflex sensitivity (CRS) is another possibility. The aim of this study was to compare HRV and CRS in children with diabetes mellitus. Materials and methods Sixty one patients (37 girls, 24 boys) aged 15-19 suffering from diabetes mellitus type 1 completed the study. Based on HRV, patients were divided into 2 groups - with DAN (n = 25) and without DAN (n = 32), 4 patients were excluded because of ambiguous results. CRS was studied in each patient by inhalation of gradually increasing concentration of capsaicin. Results Subjects with DAN required a significantly higher concentration of capsaicin needed to evoke 2 coughs (median 625 μmol/l, IQR 68.4-625.0 μmol/l vs. median 29.3 μmol/l, IQR 9.8-156.3 μmol/l, P Conclusion Diabetes mellitus lowers the cough response. Cough reflex sensitivity appears to be another sensitive method for the evaluation of DAN in diabetes.</p
Transoral application of EEA stapler after subtotal oesophagectomy
European Journal of Surgery166150-53EUJS
THERAPEUTIC APPROACH TO A CHILD WITH ACUTE RESPIRATORY DISTRESS SYNDROME: A REPORT OF TWO CASES
The course of a respiratory disorder in a child may end up in respiratory failure. There are also acute non-respiratory diseases which have a great influence on the respiratory functions and often lead to the acute lung injury and sometimes to the acute respiratory distress syndrome (ARDS). A feature of respiratory function deterioration is changed in the surfactant system. We often see inhibition of its synthesis or damage to its structure. Therapy of children suffering from ARDS should be complex and rapid. Despite many recently published studies explaining the principle of this disorder, the mortality of ARDS is still very high (30-50%). There are several studies documenting successful administration of exogenous surfactant as part of a complex combined therapy of patients with ARDS, which leads to decreased mortality, improved oxygenation, and decreased need for aggressive artificial pulmonary ventilation. The authors of this article present their own experience with administration of exogenous surfactant in therapy of children with ARDS