Dynamics of the penetration boundaries of solar protons during a strong magnetic storm

The variations in the equatorial penetration boundary of solar protons with E sub p = 0.9 to 8.0 MeV during a strong magnetic storm of April 3 to 5, were analyzed. The dynamics of this boundary is compared with the dynamics of the outer trapping boundary of electrons with E sub e = - 0.3 to 0.6 MeV. The solar-proton penetration and the structure of the real magnetic field are studied. The unique data on the thin structure of development of a magnetospheric substorm were obtained for the first time

In-memory computing with emerging memory devices: Status and outlook

Supporting data for "In-memory computing with emerging memory devices: status and outlook", submitted to APL Machine Learning

Phase Composition and Microstructure of Ti-Nb Alloy Produced by Selective Laser Melting

The phase composition and microstructure of Ti-Nb alloy produced from composite titanium and niobium powder by selective laser melting (SLM) was studied. Produced monolayered Ti-Nb alloy enhanced the formation of fine-grained and medium-grained zones with homogeneous element composition of 36-38% Nb mass interval. Alloy phase composition responded to [beta]-alloy substrate phase (grain size was 5-7 pm) and non-equilibrium martensite [alpha]"- phase (grain size was 0.1-0.7 [mu]m). [alpha]"-phase grains were found along [beta]-phase grain boundaries and inside grains, including decreased niobium content. Alloy microhardness varied within 4200-5500 MPa

Preparing Students for Engineering Based on the Use of Experimental Tasks in the Process of Learning Physics

В данной статье рассматривается методика подготовки обучающихся к инженерной деятельности на основе использования экспериментальных задач в процессе обучения физике. Описаны необходимые умения будущего инженера и методика их оценки.This article discusses the methodology of preparing students for engineering activities based on the use of experimental problems in the process of teaching physics. The necessary skills of the future engineer and the methodology of their assessment are described

Treatment of patients with anterior urethral strictures: the role of perineal urethrostomy

The article reviews the 2000-2020 literature on the use of perineal urethrostomy in the treatment of patients with anterior urethral strictures. Historical issues of the development of urethrostomy techniques are considered. The algorithms to choose the method of treatment of urethral strictures in favor of perineal urethrostomy are highlighted, according to the guidelines of the world's professional urological associations. The performance indicators of perineal urethrostomy were studied considering the age characteristics of the patients, the etiological genesis of the strictures, their length and location, as well as depending on the surgical technique and the follow-up period. Considerable attention is paid to studies devoted to the analysis of the functional results of urethrostomy, as well as the quality of life of patients associated with urination and sexual activity. Data are presented on the incidence of early and late surgical complications, including urethrostomy stenosis, as one of the most common. An analysis of studies evaluating factors that negatively affect the outcome of surgery was carried out. The main reasons for the growing demand for the technique in surgery for complex anterior urethral strictures and the importance of the technique among other treatment methods are discussed

Surgical treatment of extended spongy urethral strictures in men: minimizing the risks of narrowing in the anastomotic zones between the buccal graft and the native urethra using the dorsal inlay technique

Introduction. Currently, the most common method of treating extended urethral strictures is augmentation urethroplasty using oral mucosa grafts. Analysis of the long-term outcomes of this surgery type shows a high incidence of relapses and complications.Purpose of the study. To improve the outcomes of augmentation urethroplasty, in particular the dorsal inlay (Asopa) technique, in patients with extended spongy urethral strictures by minimizing the risk of recurrent strictures.Materials and methods. The study is based on an analysis of the surgery in 90 patients (aged 18-72 years) with extended spongy urethral strictures. Seventy patients (group I) underwent dorsal inlay augmentation urethroplasty according to the Asopa technique, and 20 patients (group II) — according to the author's modified technique. Statistical data analysis was carried out using the SPSS ver.26 software (SPSS Inc. Chicago, IL, USA).Results. A comparative analysis of the course of the early postoperative period showed a lower number of complications in group II patients compared to group I — 20.0% versus 34.3%, respectively. The recurrent strictures were registered for groups I and II in 18.8% and 5.6% of cases 6 months after surgery, respectively. The recurrent urethral narrowing was most often localized in the area of distal anastomosis between the buccal graft and the native urethra in patients from both groups.Conclusion. The modified dorsal inlay augmentation urethroplasty technique developed and implemented in clinical practice by increasing the internal urethral lumen in the areas of proximal and distal anastomosis between the buccal graft and the native spongy urethral body allows minimizing the risks of recurrent urethral narrowing after augmentation urethroplasty