Nanowire Spin Torque Oscillator Driven by Spin Orbit Torques

Spin torque from spin current applied to a nanoscale region of a ferromagnet can act as negative magnetic damping and thereby excite self-oscillations of its magnetization. In contrast, spin torque uniformly applied to the magnetization of an extended ferromagnetic film does not generate self-oscillatory magnetic dynamics but leads to reduction of the saturation magnetization. Here we report studies of the effect of spin torque on a system of intermediate dimensionality - a ferromagnetic nanowire. We observe coherent self-oscillations of magnetization in a ferromagnetic nanowire serving as the active region of a spin torque oscillator driven by spin orbit torques. Our work demonstrates that magnetization self-oscillations can be excited in a one-dimensional magnetic system and that dimensions of the active region of spin torque oscillators can be extended beyond the nanometer length scale.Comment: The link to the published version is http://www.nature.com/ncomms/2014/141205/ncomms6616/full/ncomms6616.htm

Integration of theoretical and clinical disciplines teaching as one of factors of medical knowledge efficacy

The article discusses the problem of medical students theoretical knowledge improvement that will significantly improve their clinical knowledge. The main factors that determine medical students’ positive motivation to study are considered. The authors prove that both theoretical and clinical disciplines teaching integration is possible as a result of complex approach to students teaching that will result in students’ knowledge survival on the higher courses. Leading role belongs to the theoretical departments which workers by writing textbooks and manuals, creating teaching multimedia programmes, using exact control and students' knowledge evaluation will provide the necessary motivational component of students’ further teaching on clinical departments. The integrated approach contributes to future profession single picture formation, motivates students to theoretical and clinical disciplines deep study. The future doctors teaching process reforming at Odessa National Medical University General and Clinical Pathological Physiology Department is given as an example.Authors guesses that new methodical methods of working with students in the practical work introduction, the change in the technology of teaching, the modification of the educational process, the approximation of theoretical knowledge to the patient's bed, the greater students interest in the positive end-goal - a correct diagnosis and cure of the patient - will allow to optimize the educational process and improve the quality of students’ training

Formation of 24Mg* in the Splitting of 28Si Nuclei by 1-GeV Protons

The 28Si(p, p' gamma)24Mg reaction has been studied at the ITEP accelerator by the hadron-gamma coincidence method for a proton energy of 1 GeV. Two reaction products are detected: a 1368.6-keV gamma-ray photon accompanying the transition of the 24Mg* nucleus from the first excited state to the ground state and a proton p' whose momentum is measured in a magnetic spectrometer. The measured distribution in the energy lost by the proton in interaction is attributed to five processes: the direct knockout of a nuclear alpha cluster, the knockout of four nucleons with a total charge number of 2, the formation of the DeltaSi isobaric nucleus, the formation of the Delta isobar in the interaction of the incident proton with a nuclear nucleon, and the production of a pi meson, which is at rest in the nuclear reference frame. The last process likely corresponds to the reaction of the formation of a deeply bound pion state in the 28P nucleus. Such states were previously observed only on heavy nuclei. The cross sections for the listed processes have been estimated.Comment: 14 pages, 3 figures submitted to JETP Letter

Influence of type 2 sodium-glucose co-transporter inhibitors (dapagliflozin) on the indicators of total mortality in patients with type 2 diabetes (CARDIA-MOS study, Moscow)

BACKGROUND: The widespread use in clinical practice of drugs with cardio- and nephroprotective properties, in particular, sodium-glucose cotransporter type 2 inhibitors (SGLT2i), is based on the results of large-scale international randomized trials. Meanwhile, there are no data demonstrating the possibility of the influence of these drugs on mortality rates in real clinical practice in Russian patients. To study this issue, a CARDIA-MOS study was conducted on a population of patients with type 2 diabetes (T2DM) in Moscow.AIM: To study the effect of SGLT2i on the total mortality of patients with T2DM in Moscow.MATERIALS AND METHODS: To assess the frequency of different outcomes, two samples of patients were formed according to predetermined criteria: 1) patients who started therapy with SGLT2i (dapagliflozin) in 2017; 2) a control group of patients corresponding to the main group in terms of key indicators: age, duration of T2DM, presence of cardiovascular diseases, use of insulin therapy, HbA1c level.RESULTS: Firstly, an analysis of the data of 499 patients who started treatment with dapagliflozin in 2017, as well as 499 patients in the control group (n = 998) was made. The baseline characteristics of the patients were generally comparable. Pre-study SBP and HbA1c were worse in the dapagliflozin group. The use of dapagliflozin was associated with a 39% reduction in the relative risk of death from all causes (RR 0.614, 95% CI 0.417–0.903, p = 0.013), led to a decrease in HbA1c levels by 0.8% (from 8.5 to 7.7%, p<0.001) for 48 months. observations. The safety profile of dapagliflozin was comparable to that of the control groupCONCLUSION: The use of dapagliflozin in the treatment of patients with T2DM can reduce overall mortality and improve glycemic control

Real World Effectiveness of fixed combination of glargine 100 U/ml and lixisenatide therapy in outpatients with Type 2 Diabetes: A Retrospective Cohort Study SOLO

Background: The effectiveness and safety of a fixed combination of insulin glargine 100 ME/ml and lixisenatide for treatment of patients with type 2 diabetes (T2DM) has been demonstrated in randomized clinical trials, but there are still not enough data of it`s usage of it real clinical practice.Aim: To describe the baseline characteristics of patients with T2DM who started treatment with a fixed ratio combination of insulin glargine 100 ME/ml and lixisenatide in the period from November 2018 to July 2020, and to evaluate the effectiveness of using fixed combination of insulin glargine 100 ME/ml and lixisenatide in for 6–12 months of therapy in a real outpatient practice.Materials and methods: SOLO was a retrospective cohort multicentre study conducted in Russia, Moscow. Adults (≥18 years) with T2DM and HbA1c≥7% in case of availability of medical records during ≥180 days before and ≥1 HbA1c level during 150–210 days after start of treatment with Soliqua SoloStar® were eligible.Results: A total of 383 people with T2DM were included. Baseline characteristics were the following (mean±SD): age 59.9±8.3 years; BMI 36.4±6.3 kg/m2; proportion of patients with BMI≥35 kg/m2 — 52.2%; HbA1c 9.14±1.08%. 65% of patients received oral antidiabetic drugs (OAD) before start of treatment with fixed combination of insulin glargine 100 ME/ml and lixisenatide ; 31.3% of patients were switched from combination of OAD with basal insulin, 1.04% of patients received other therapy (GLP-1 RA, basal-bolus insulin treatment, basal insulin monotherapy), and 2.61% of patients did not receive any hypoglycemic therapy. HbA1c level was 7.78±0.8% after 6 months of treatment and 7.4±0.61% after 12 months. There was a significant decrease of body weight from the baseline value 101.62±20.64 kg by 1.96±4.03 kg at month 6 and by 3.13±4.71 kg at month 12 (p<0.001) Overall, 4 patients (1.04%) reported symptomatic hypoglycemia (glycemia ≤3.9 mmol/L); no episodes of severe hypoglycemia were registered.Conclusion: In a real-life setting in Russia, initiation of a fixed combination of insulin glargine 100 ME/ ml and lixisenatide in people with T2DM uncontrolled on OADs or combination of OADs with basal insulin resulted resulted in an improved glycemic control and body weight change with low risk of hypoglycemia compared to baselin

Twist maps for non-standard quantum algebras and discrete Schrodinger symmetries

The minimal twist map introduced by B. Abdesselam, A. Chakrabarti, R. Chakrabarti and J. Segar (Mod. Phys. Lett. A 14 (1999) 765) for the non-standard (Jordanian) quantum sl(2,R) algebra is used to construct the twist maps for two different non-standard quantum deformations of the (1+1) Schrodinger algebra. Such deformations are, respectively, the symmetry algebras of a space and a time uniform lattice discretization of the (1+1) free Schrodinger equation. It is shown that the corresponding twist maps connect the usual Lie symmetry approach to these discrete equations with non-standard quantum deformations. This relationship leads to a clear interpretation of the deformation parameter as the step of the uniform (space or time) lattice.Comment: 16 pages, LaTe