Temperature dependence of the probability of "small heating" and total losses of ucns on the surface of fomblin oils of different molecular mass

We measured the temperature dependence of the probability of small heating and total losses of UCNs on the PFPE Fomblin Y surface with various molecular masses Mw=2800, 3300, 6500 amu in the temperature range of 100-300 K. The probability of small heating sharply decreases with increasing Mw and decreasing temperature. The probability of total loss weakly decreases with decreasing temperature and takes the minimum value at Mw=3300 amu. As this oil provides a homogeneous surface with minimal probabilities of small heating and total losses of UCNs, it is the preferred candidate for experiments on measuring the neutron lifetime

THE IMPACT OF DOWNSIZING ON THE BANKRUPTCY OF RUSSIAN COMPANIES

Links between staff reductions and the company’s bankruptcyare identified. The empirical base of research included 650 companies (150 bankrupts) in the manufacturing industry and 1,500 companies (410 bankrupts) in the construction industry. The logit model was implemented in the center of a research methodology. According to the research it was revealed that the reduction of staff by 3%, 5%, 7% and 10% leads to the company’s bankruptcy. Moreover, the meaningful factor of bankruptcy is the change in financial, physical and intangible resources used by company to reverse negative consequences of the stuff reduction

Phase distortions of attosecond pulses produced by resonance-enhanced high harmonic generation

Resonant enhancement of high harmonic generation can be obtained in plasmas containing ions with strong radiative transitions resonant with harmonic orders. The mechanism for this enhancement is still debated. We perform the first temporal characterization of the attosecond emission from a tin plasma under near-resonant conditions for two different resonance detunings. We show that the resonance considerably changes the relative phase of neighbouring harmonics. For very small detunings, their phase locking may even be lost, evidencing strong phase distortions in the emission process and a modified attosecond structure. These features are well reproduced by our simulations, allowing their interpretation in terms of the phase of the recombination dipole moment

The Comparative Analysis of the Identification of Parasitic Fungi Races Affecting the Soil and Cultivated Vegetable and Cucurbits Crops in the Astrakhan Region

The habitat of plant pathogens does not remain constant and undergoes significant changes. Therefore, the reasons have to be revealed: the emergence of fungal infectious matter in the soil; the infection source and rate, which may have epiphytotic character under environmental factors of the disease development and consequently lead to the reduction in the yield of vegetable and cucurbits crops. As a result, it is necessary to conduct monitoring and objective diagnosis of the phytosanitary condition of the planting of vegetables and melons. In this case, the identification of parasitic fungi races of the Astrakhan region remains relevant and timely

Radiation and Thermal Stability of Solid Radwaste After Immobilization in Polymer Matrix -13504

ABSTRACT The paper will illustrate results of the various experiments on radiation and thermal stability of polymer matrixes after solutions solidification including aqueous and organic solutions and mixed waste. It was shown that-after irradiation the specimen and after solidification the mixture with oil and TBP hydrogen has been observed (less 1%) and some others gases have been detected. Results of the performed experiments and the radiation stability data of the polymer compositions allow the conclusion that the technological process of immobilizing the above mentioned aqueous solutions and solutions with organic products into polymers at room temperature is the explosion-and flameproof as well as the storage thereof

ВЛИЯНИЕ СОКРАЩЕНИЯ ПЕРСОНАЛА НА БАНКРОТСТВО РОССИЙСКИХ КОМПАНИЙ

Links between staff reductions and the company’s bankruptcyare identified. The empirical base of research included 650 companies (150 bankrupts) in the manufacturing industry and 1,500 companies (410 bankrupts) in the construction industry. The logit model was implemented in the center of a research methodology. According to the research it was revealed that the reduction of staff by 3%, 5%, 7% and 10% leads to the company’s bankruptcy. Moreover, the meaningful factor of bankruptcy is the change in financial, physical and intangible resources used by company to reverse negative consequences of the stuff reduction.Выявлена связь между сокращениями персонала и наступлением банкротства организации. Эмпирическая база исследования включала 650 компаний (150 банкротов) производственной отрасли и 1500 (410 банкротов) компаний строительной отрасли, методология исследования: логит-модель. По результатам исследования было выявлено, что сокращение персонала на 3,5,7 и 10% ведет за собой банкротство компании. Значимым фактором для банкротства компаний является изменение финансовых, физических и нематериальных ресурсов, которыми компания пытается нивелировать негативные последствия сокращения персонала организации

GRANIT project: a trap for gravitational quantum states of UCN

Previous studies of gravitationally bound states of ultracold neutrons showed the quantization of energy levels, and confirmed quantum mechanical predictions for the average size of the two lowest energy states wave functions. Improvements in position-like measurements can increase the accuracy by an order of magnitude only. We therefore develop another approach, consisting in accurate measurements of the energy levels. The GRANIT experiment is devoted to the study of resonant transitions between quantum states induced by an oscillating perturbation. According to Heisenberg's uncertainty relations, the accuracy of measurement of the energy levels is limited by the time available to perform the transitions. Thus, trapping quantum states will be necessary, and each source of losses has to be controlled in order to maximize the lifetime of the states. We discuss the general principles of transitions between quantum states, and consider the main systematical losses of neutrons in a trap.Comment: presented in ISINN 15 seminar, Dubn

TAVISCORE: a computer program for risk stratification of complications after aortic valve interventions in patients with reduced ejection fraction

Aim. To demonstrate the TAVISCORE program designed to stratify the risk of complications after aortic valve (AV) interventions in patients with reduced ejection fraction.Material and methods. For the period from 2015-2022 at the Almazov Federal North-West Medical Research Center, 128 interventions on AV were performed for aortic stenosis in patients with reduced ejection fraction as follows: 61 — surgical AV replacement (SAVR), 67 — transcatheter aortic valve implantation (TAVI). To create an interactive calculator TAVISCORE (link for free download: https://drive.google.com/file/d/1a3s2MK6Tpk0cIQ_aMB7xe63upEwJsJOh/view?usp=sharing) all patients were combined into one group. For each factor present in the patient, the prognostic coefficient, its contribution to the likelihood of an event in the long-term follow-up period (death, myocardial infarction, stroke), was calculated. The next step, based on the calculations obtained and using the Python 3.10.6 language, was the creation of the TAVISCORE program.Results. The TAVISCORE was created for the personalized choice of tactics for the treatment of patients with aortic stenosis. It contains 54 risk factors and makes it possible to determine probability of cardiac or non-cardiac events in the long-term follow-up period after SAVR and TAVI. Thus, a tactic with lower probability of a complication can be chosen as optimal in this particular case. Retrospective use of the TAVISCORE after surgery can identify patients at high risk of complications, which will allow them to be selected for more thorough management and more frequent screening.Conclusion. The TAVISCORE can be used by a multidisciplinary consensus to select the treatment tactics and stratify the risk of complications after different AV replacement variants in patients with a reduced ejection fraction. Further prospective testing of this program is required