Experimental, Numerical and Analytical Evaluation of Load-Bearing Capacity of Cold-Formed S-Beam with Sectional Transverse Strengthening.

The article provides information about strengthening cold-formed thin-walled steel beams made of the sigma profile. An innovative concept for sectional transverse strengthening of thin-walled beams subjected to concentrated forces was investigated. The proposed solution's novelty lies in attaching the sectional transverse strengthening to the beam's cross-section, employing a point crimping technique.

[Comparative estimation of results of remote and combined radiotherapy in patients with cancer of the cervix uteri of the III-IV stages of disease].

The paper presents a procedure of teleradiotherapy in patients with stages III-IV cancer of the cervix uteri with significant concurrent pathology. Control patients with the similar disease stages underwent combined radiation therapy. If there are contraindications to combined radiation therapy, teleradiotherapy is possible and required as an independent treatment that prolongs and improves the patients' like quality irrespective of the extent of a tumorous process.

[Evaluating the efficiency of combined and radiation treatment of vulvar cancer].

The outcomes of radiation treatment of 70 patients with Stage I-II vulvar cancer are analyzed. Combined treatment was used in 10 patients (3 and 7 patients had Stage I and II, respectively), combined radical radiation therapy was applied in 21 patients (Stage II), split-course gamma-teletherapy was employed in 28 patients (6 and 22 patients with Stages II and III, respectively) and 3 females had short-range X-ray therapy. Palliative radiation therapy was performed in 8 patients with Stage III tumors.

[Rare forms of Hodgkin's disease manifestations].

X-Ray diagnosis of secondary involvement of the vertebrae in Hodgkin's disease is difficult because pathognomonic shadow symptoms are absent. Interpretation of roentgenograms is still more difficult when a soft-tissue component which may simulate a "cold abscess" appears in the paravertebral area. Differential diagnosis is based on the clinical and x-ray correlations and histologic findings.

[The effect of the composition of an artificial gas environment under pressure up to 5.1 MPa on the oxidation-reduction reactions in the human body].

In 500-m dives, lipid and carbohydrate metabolism was found to depend on the composition of hyperbaric gas mixture. Reduction of the oxygen partial pressure for over 2.0 kPa from the optimal one depressed aerobic energy-producing biochemical reactions in the human blood cells.

[The principles of oxygen standardization in artificial hyperbaric gas mixtures during the prolonged stay of aquanauts at depths down to 500 m].

In simulation of saturation dives at 3.6-5.1 MPa, physiologically optimal limits of oxygen partial pressure were determined in breathing gas mixtures.

[Immunologic response of divers working in the conditions of increased microbial contamination of water under pressure up to 5.1 MPa].

The complex investigation of immune and nonspecific reactivity of 30 aquanauts was carried out during five experimental saturation divings up to 350-500 m accompanied by an increase of microbic contamination in water of the hyperbaric chamber. Peculiarities of humoral immune response and phagocyte functions were found to depend on the inflammatory disease of aquanauts. It is concluded that the situational transitory immune deficiency development under the influence of hyperbaric factors is possible and changes in the microbe spectrum are real.

[Evaluation of energy metabolism and physical work capacity of divers for determining the optimal oxygen level during breathing gas mixture under pressure up to 5.1 MPa].

A complex evaluation of energy metabolism, oxygen-transport function of blood and physical work capacity of aquanauts has been performed during three imitation divings at depths of 400, 450 and 500 m in heliox as a breathing medium. These experiments have shown that optimal levels of partial oxygen pressure in artificial chamber environment are 30-33 kPa at 4.1 MPa, 32-35 kPa at 4.

[Conditions for the development of isobaric counterdiffusion of inert gases and the criteria of its evaluation].

Investigation of superficial counterdiffusion of nitrogen against helium has been carried out to evaluate a possibility of its progress in divers (107 tests) under pressures equivalent to 32-450 m of sea water when breathing trimix being saturated in heliox at a constant ambient pressure without changing chamber environment. Breathing gas mixture contained 248-800 kPa of nitrogen, while chamber heliox media contained some additions of nitrogen (6-108 kPa). Clinical manifestations of breathing trimix (itching and gas bubble formation) were studied in divers.