Calculation model of heating curves of a steel charge heated in a walking beam furnace before plastic working

The paper presents a universal computational model of heating curves for walking beam furnaces, which allows to determine the temperature distribution along the length of the furnace during heating of the steel charge. The model was made based on analytical dependencies regarding transient heat conduction, taking into account the temperature variability of all thermo-physical properties. The methodology of calculations and examples of heating curves for selected cases are presented

From the Competence Model of a Specialist Engineer to STEAM Education, or … Going Ahead to the Past?

Cognitive and value dissonances of the modern world, as well as the shifting balance in the “Technology-nature-society-man” system cause the need to rethink key development strategies, determine the guidelines that education should be guided by in order to be able to respond to the growing global challenges of modernity. The special acuteness of the modern formulation of this problem is due to the new format of the geopolitical life of the Russian Federation and the associated restructuring of many social institutions of the country, in particular, science and education.The article raises the question of the leading paradigm of domestic engineering education, considered in the prism of a specialist-engineer model that meets the requirements of the modern stage of society.Education standards have changed dramatically and repeatedly in their target characteristics over the past twenty years. The article considers the features of the competence model of specialist presented in the modern version of the Federal State Educational Standards of higher education (FSES HE). It is shown that the existing version of FSES does not fully meet the requirements for specialists in the modern world. In addition to highly professional knowledge and skills, future engineers need contextual, meta-professional and soft knowledge and skills for life and successful professional activity.World practice shows that one of the promising areas of training engineers is a project-oriented approach, which emphasizes the practical orientation of higher education. The authors have shown that the recognized international standards of engineering education in the fields of technology, natural and applied sciences (CDIO, STEM education) basically coincide with the world-known and repeatedly tested “Russian method of training engineers”, integrating broad fundamental education in the field of natural sciences and humanities and technological practice at advanced innovative enterprises. This experience which has already given the world great engineers and adapted at the same time to the modern technological capabilities of its transmission can become a fulcrum in a transitive world

Scalar Particle Contribution to Higgs Production via Gluon Fusion at NLO

We consider the gluon fusion production cross section of a scalar Higgs boson in models where fermion and scalar massive colored particles are present. We report analytic expressions for the matrix elements of $gg\to Hg$, $q\bar{q}\to Hg$, and $qg\to Hq$ processes completing the calculation of the NLO QCD corrections in these extended scenarios. The formulas are written in a complete general case, allowing a flexible use for different theoretical models. Applications of our results to two different models are presented: i) a model in which the SM Higgs sector is augmented by a weak doublet scalar in the $SU(N_c)$ adjoint representation. ii) The MSSM, in the limit of neglecting the gluino contribution to the cross section.Comment: 20 pages, 5 figures. Minor changes. Refs. adde

Assessment of the quality of life of patients with achalasia of the cardia after videoendoscopic Heller cardiomyotomy with Dor fundoplication

Background. The leading symptom of achalasia of cardia (AC) is dysphagia, along with other symptoms significantly affecting the quality of life of patients.The aim. Based on the results of questioning patients using special and general questionnaires and using special methods for studying the closing function of the cardia, to evaluate the quality of life of patients with stages 2–4 of AC after video-laparoscopic esophagocardiomyotomy according to Heller with anterior hemiasophagofundoplication according to Dor.Materials and methods. The basis of the work was the analysis of the results of esophagocardiomyotomy according to Heller with anterior hemiesophagofundoplication according to Dor in 106 patients with stages 2–4 of AC. The postoperative follow-up period averaged 2 ± 0.4 years. In the pre- and postoperative periods, the results of fluoroscopy of the esophagus and stomach, manometry of the esophagus and the esophageal-gastric junction were studied, and three questionnaires were used (Eckhardt scale, GIQLI questionnaire and SF-36).Results. Analysis of the data obtained showed that the clinical manifestations of the disease in the postoperative period decreased in all patients with stages 2–4 of AC, the results in patients with stage 2 were better than in patients with stages 3 and 4 (p < 0.05). The results of fluoroscopy of the esophagus and stomach, manometry of the esophagus and the esophagogastric junction showed improvement in the postoperative period in patients at all stages of the disease, the results of patients with stage 4 were worse compared with stages 2 and 3 (p < 0.05).Conclusion. Videoendoscopic esophagomyotomy according to Heller with anterior fundoplication according to Dor significantly reduces the severity of clinical manifestations of AC and improves the quality of life in patients with stages 2–4 of AC, as a result of which surgery should be recommended to patients already at stage 2 and organ-preserving surgery at stage 4 of the disease

Measurement of Direct fₒ(980) Photoproduction on the Proton

We report on the results of the first measurement of exclusive f0(980) meson photoproduction on protons for Eγ = 3.0–3.8  GeV and −t = 0.4–1.0  GeV2 . Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the π+π− channel by performing a partial wave analysis of the reaction γp→pπ+π− . Clear evidence of the f0(980) meson was found in the interference between P and S waves at M π+π− ∼1  GeV. The S -wave differential cross section integrated in the mass range of the f0(980) was found to be a factor of about 50 smaller than the cross section for the ρ meson. This is the first time the f0(980) meson has been measured in a photoproduction experiment

Precise Measurement of the Neutron Magnetic Form Factor GnM in the Few-GeV² Region

The neutron elastic magnetic form factor was extracted from quasielastic electron scattering on deuterium over the range Q2 = 1.0–4.8  GeV2 with the CLAS detector at Jefferson Lab. High precision was achieved with a ratio technique and a simultaneous in situ calibration of the neutron detection efficiency. Neutrons were detected with electromagnetic calorimeters and time-of-flight scintillators at two beam energies. The dipole parametrization gives a good description of the dat