IMPACT OF INFORMATION TECHNOLOGY ON THE STRUCTURE OF MATHEMATICAL ABILITIES OF HIGH SCHOOL STUDENTS OF MATHEMATICAL PROFILE

We relied on the structure of V.A. Krutetskiy consisting of four components: obtaining mathematical information (perceptual component); processing mathematical information (procedural component); storage of mathematical information (mnemonic component); mathematical orientation of the mind (general synthetic component). The following hypothesis was proposed: the use of information technology affects the positive trend in the development of all components of mathematical abilities, and especially on general synthetic component due to the harmonious combination of two sub-components: verbal-logical and visual-figurative. We used a modified methodic, which is a shortened version of tasks classification of V.A. Krutetskiy. The tasks consisted of nine batteries of problems whose solution was assessed by a dichotomous scale, and then the result is expressed as a percentage by number of correctly solved tasks in the series. Analysis of the results of the comparison of mathematical abilities in a sample of 60 people (students-programmers and students non-programmers) showed that a high school students-programmers developed a general synthetic component (t = 2,566, p = 0,013). The students perform tasks with the visual representations and schemes better that contributes to the development of parameters procedural component

Mechanical Aspects of Nonhomogeneous Deformation of Aluminum Single Crystals under Compression along [100] and [110] Directions

The deformation behavior of aluminum single crystals subjected to compression along the [100] and [110] directions is numerically examined in terms of crystal plasticity. A constitutive model taking into account slip geometry in face-centered cubic crystals is developed using experimental data for the single-crystal samples with lateral sides coplanar to certain crystal planes. Two sets of calculations are performed using ABAQUS/Explicit to examine the features of plastic strain evolution in perfectly plastic and strain-hardened crystals. Special attention is given to the discussion of mechanical aspects of crystal fragmentation. Several distinct deformation stages are revealed in the calculations. In the first stage, narrow solitary fronts of plastic deformation are alternately formed near the top or bottom surfaces and then propagate towards opposite ends to save the symmetry of the crystal shape. The strain rate within the fronts is an order of magnitude higher than the average strain rate. The first stage lasts longer in the strain-hardened crystals, eventually giving way to an intermediate stage of multiple slips in different crystal parts. Finally, the crystal shape becomes asymmetrical, but no pronounced macroscopic strain localization has been revealed at any deformation stage. The second stage in perfectly plastic crystals relates to abrupt strain localization within a through-thickness band-shaped region, accompanied by macroscale crystal fragmentation. Stress analysis has shown that pure compression took place only in the first deformation stage. Once the crystal shape has lost its symmetry, the compressive stress in some regions progressively decreases to zero and eventually turns tensile

Damage of high-chromium steels under deformation in a wide temperature range

High-chromium steels have high strength properties, corrosion properties and resistance to neutron irradiation, thereby are considered as promising steels for nuclear reactors of generation IV. The deformation and damage of high chromium steels in a wide temperature range was studied by numerical simulation method. A model was proposed to predict the deformation and damage of high chromium steels under quasi–static loading within the temperature range from 295 to 1100 K. It is shown that the ductility of high-chromium steels increases proportionally to temperature in the range from 750 to 1100 K due to the growth of α′-phase precipitates

Holter monitoring in the assessment of physiological systems in patients with cervical cancer

The article sets the task to consider the effectiveness of Holter monitoring during electrocardiographic monitoring of the state of the heart as a pivot factor in the functional state of the body during specific treatment of patients with cervical cancer. As a result, the authors prove that Holter monitoring of myocardial bioelectrical activity in the treatment of cervical cancer can detect heart rhythm disturbance both in individuals being examined according to indications, and in patients who had no indications for electrocardiographic monitoring at more early stages of the examination. Based on this, using Holter electrocardiographic monitoring as a mandatory test is advisable to ensure proper monitoring of the myocardium in patients with cervical cance

The effect of differences in the third domain of the glycoprotein E of tick-borne encephalitis virus of the Far Eastern, Siberian and European subtypes on the binding of recombinant D3 proteins with a chimeric antibody

Currently, a therapeutic drug based on recombinant antibodies for the prevention and treatment of tick-borne encephalitis virus (TBEV) is developed in ICBFM SB RAS, and the chimeric antibody ch14D5 is considered as one of the key components of this drug. It was previously shown that this antibody is directed to the domain D3 of the glycoprotein E of TBEV. It was previously shown that this antibody is able to protect mice from the European subtype of TBEV, strain “Absettarov”, and the presence of virus-neutralizing activity against the Far Eastern subtype of TBEV, strain 205 was also shown for this antibody. However, it remains unclear whether this antibody exhibits selectivity for different subtypes of TBEV. The aim of this study was to investigate the effect of amino acid sequence differences of recombinant D3 domains derived from the glycoprotein E of TBEV of the Far Eastern, Siberian and European subtypes on the binding of the protective antibody ch14D5 to these proteins. Using Western blot analysis and surface plasmon resonance, it was shown that ch14D5 antibody has the highest affinity (KD= 1.7±0.5 nM) for the D3 domain of the TBEV of the “Sofjin-Ru” strain belonging to the Far Eastern subtype of the virus. At the same time, the affinity of ch14D5 antibody for similar D3 proteins derived from “Zausaev”, “1528-99” and “Absettarov” strains of the Siberian and European subtypes of TBEV was noticeably lower (KD= 25±4, 300±50, 250±50 nM, respectively). In addition, information about the spatial arrangement of amino acid residues that are different for the studied recombinant proteins indicates that the epitope recognized by the ch14D5 antibody is in close proximity to the lateral ridge of D3 domain of E glycoprotein

ПЕРСПЕКТИВЫ ИСПОЛЬЗОВАНИЯ БЕВАЦИЗУМАБА ПРИ НЭО. КЛИНИЧЕСКИЙ СЛУЧАЙ

Advanced well differentiated neuroendocrine tumors (NET) have poor sensitivity to chemotherapy. Biotherapy and targeted therapy are the main treatment options for these patients. Approaches to the 2nd and subsequent lines of treatment have not been developed to date. VEGFR blocker bevacizumab is actively studied in well differentiated NET. For well differentiated NET, it has been shown that an increase in VEGF expression is associated with metastasis and decrease in progression-free survival. Диссеминированные высокодифференцированные нейроэндокринные опухоли (НЭО) характеризуются слабой чувствительностью к химиотерапии, и для лечения этих больных в основном применяют биотерапию и таргетные препараты. Стандарты 2-й и последующих линий лечения до настоящего времени не разработаны. Таргетный препарат бевацизумаб из группы VEGFR блокаторов активно изучается при высокодифференцированных НЭО. Для высокодифференцированных НЭО показано, что повышение экспрессии VEGF связано с метастазированием и уменьшением выживаемости без прогрессирования.