FPT-algorithms for some problems related to integer programming

In this paper, we present FPT-algorithms for special cases of the shortest lattice vector, integer linear programming, and simplex width computation problems, when matrices included in the problems' formulations are near square. The parameter is the maximum absolute value of rank minors of the corresponding matrices. Additionally, we present FPT-algorithms with respect to the same parameter for the problems, when the matrices have no singular rank sub-matrices.Comment: arXiv admin note: text overlap with arXiv:1710.00321 From author: some minor corrections has been don

The comparative analysis of ventral technologies in staged surgical treatment of burst fractures of the lower thoracic and lumbar vertebrae

For the purpose of comparative analysis of minimally invasive and traditional ventral decompressive-stabilizing operations in phasing dorsalventral surgical treatment of burst fractures of the lower thoracic and lumbar vertebrae, the authors examine two respective groups of patients - 20 and 18 peo-ple. The authors state that the performance of the ventral stage of surgical treatment of burst fractures of the lower thoracic and lumbar vertebrae from miniaccesses, with video endoscopy can reduce blood loss by 38% and operative time by 27% in comparison with traditional ventral technologies, to receive better results of treatment.С целью сравнительного анализа малоинвазивных и традиционных вентральных декомпрессивно-стабилизирующих операций в этапном дорсо-вентральном оперативном лечении взрывных переломов нижних грудных и поясничных позвонков авторы исследуют две соответствующие группы пациентов - 20 и 18 человек. Авторы констатируют, что выполнение вентрального этапа хирургического лечения взрывных переломов нижних грудных и поясничных позвонков из минидоступов, с видеоэндоскопией позволяет сократить кровопотерю на 38% и продолжительность операции на 27 % в сравнении с традиционными вентральными технологиями, получить лучшие результаты лечения

Minimally invasive surgery in the treatment of complicated and uncomplicated burst fractures of the lower thoracic and lumbar vertebrae

The authors analyze the experience of surgical treatment of 39 patients with burst fractures of the lower thoracic and lumbar vertebrae. The authors note that modified dorsal intermuscular access, implantation of a transpedikular construction and video endoscopic manipulations provide low-invasive adequate stabilization and a decompression at treatment of the burst fractures of the lower thoracic and lumbar vertebrae.Авторы анализируют опыт хирургического лечения 39 пациентов с взрывными переломами нижних грудных и поясничных позвонков. Авторы констатируют, что модифицированный дорсальный межмышечный доступ, имплантация транспедикулярной конструкции и видеозндоскопические манипуляции обеспечивают малоинвазивную адекватную стабилизацию и декомпрессию при лечении данных повреждений

AC/DC Susceptibility of the Heavy-Fermion Superconductor CePt3Si under Pressure

We have investigated the pressure dependence of ac and dc susceptibilities of the heavy-fermion superconductor CePt3Si (Tc= 0.75 K) that coexists with antiferromagnetism (TN = 2.2 K). As hydrostatic pressure is increased, Tc first decreases rapidly, then rather slowly near the critical pressure Pc = 0.6 GPa and shows a stronger decrease again at higher pressures, where Pc is the pressure at which TN becomes zero. A transition width and a difference in the two transition temperatures defined in the form of structures in the out-of-phase component of ac susceptibilities also become small near Pc, indicating that a double transition observed in CePt3Si is caused by some inhomogeneous property in the sample that leads to a spatial variation of local pressure. A sudden increase in the Meissner fraction above Pc suggests the influence of antiferromagnetism on superconductivity.Comment: 4 pages with 5 figures. This paper will be published in J. Phys. Soc. Jp

Measurement of the e+e−→K+K−π+π−e^+e^- \to K^+K^-\pi^+\pi^- cross section with the CMD-3 detector at the VEPP-2000 collider

The process $e^+e^- \to K^+K^-\pi^+\pi^-$ has been studied in the center-of-mass energy range from 1500 to 2000\,MeV using a data sample of 23 pb$^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider. Using about 24000 selected events, the $e^+e^- \to K^+K^-\pi^+\pi^-$ cross section has been measured with a systematic uncertainty decreasing from 11.7\% at 1500-1600\,MeV to 6.1\% above 1800\,MeV. A preliminary study of $K^+K^-\pi^+\pi^-$ production dynamics has been performed