Dynamics of the Chiral Magnetic Effect in a weak magnetic field

We investigate the real-time dynamics of the chiral magnetic effect in quantum electrodynamics (QED) and quantum chromodynamics (QCD). We consider a field configuration of parallel (chromo)electric and (chromo)magnetic fields with a weak perpendicular electromagnetic magnetic field. The chiral magnetic effect induces an electromagnetic current along this perpendicular magnetic field, which we will compute using linear response theory. We discuss specific results for a homogeneous sudden switch-on and a pulsed (chromo)electric field in a static and homogeneous (chromo)magnetic field. Our methodology can be easily extended to more general situations. The results are useful for investigating the chiral magnetic effect with heavy ion collisions and with lasers that create strong electromagnetic fields. As a side result we obtain the rate of chirality production for massive fermions in parallel electric and magnetic fields that are static and homogeneous.Comment: 13 pages, 7 figures, revte

Features of Nickel-Cadmium Batteries Recycling

The issue of operated-off alkaline nickel-cadmium batteries recycling is currently relevant due to a number of aspects: economic, environmental and social. It is most acute across the national corporation JSC Russian Railways. The article deals with some technological features of operated-off alkaline nickel-cadmium batteries recycling with valuable components being extracted (from the example of nickel-cadmium storage batteries of JSC ”RZD” rolling equipment). The results of leaching in Trilon B synthetic oxides solution, the presence of which is possible in the raw material being processed, are presented in the study. Based on the study of leaching processes of CdO, NiO, FeO, Femet and Fe2O3 in Trilon B solution, the dependence of complexing on the pH of the solution was revealed. The experimental site of the hydrometallurgical processing of the research center (OCGP IC) in the GMO KhMC PJSC ”Uralelectromed” was selected as the testing one for the technology proposed. As a raw material for the tests, a lot of negative lamellae packed in alkaline storage batteries of two different types were used. They were obtained as a result of preliminary drying and cutting at OOO Kursk factory ”Accumulator”. The particle size is 90% - 0.1 mm. The results obtained during the research allowed the author to formulate a hypothesis about the practical use of Trilon B for the processing of operated-off alkaline nickel-cadmium batteries with the extraction of valuable components having greater economic, environmental and social benefits compared to methods based on pyro metallurgy. Keywords: nickel-cadmium batteries, recycling, Trilon B, Russian Railways, hydrometallurgica

Status of the organized recycling of cadmium-bearing secondary raw materials

The main methods being used in metallurgy to systematically recycle cadmium-bearing secondary raw materials are examined. Hydrometallurgical methods which use sequestering reagents that can be regenerated are the most promising technologies from the standpoint of suitability for industrial use, environmental safety, and the selectivity with which cadmium is extracted. © 2013 Springer Science+Business Media New York

Real and virtual photons in an external constant electromagnetic field of most general form

The photon behavior in an arbitrary superposition of constant magnetic and electric fields is considered on most general grounds basing on the first principles like Lorentz- gauge- charge- and parity-invariance. We make model- and approximation-independent, but still rather informative, statements about the behavior that the requirement of causal propagation prescribes to massive and massless branches of dispersion curves, and describe the way the eigenmodes are polarized. We find, as a consequence of Hermiticity in the transparency domain, that adding a smaller electric field to a strong magnetic field in parallel to the latter causes enhancement of birefringence. We find the magnetic field produced by a point electric charge far from it (a manifestation of magneto-electric phenomenon). We establish degeneracies of the polarization tensor that (under special kinematic conditions) occur due to space-time symmetries of the vacuum left after the external field is imposed.Comment: 30 pages, 1 figure, 57 equations, reference list of 38 item

Studies of concentration and temperature dependencies of precipitation kinetics in iron-copper alloys using kinetic monte carlo and stochastic statistical simulations

The earlier-developed ab initio model and the kinetic Monte Carlo method (KMCM) are used to simulate precipitation in a number of iron-copper alloys with different copper concentrations x and temperatures T. The same simulations are also made using the improved version of the earlier-suggested stochastic statistical method (SSM). The results obtained enable us to make a number of general conclusions about the dependencies of the decomposition kinetics in Fe-Cu alloys on x and T. We also show that the SSM describes the precipitation kinetics in a fair agreement with the KMCM, and employing the SSM in conjunction with the KMCM enables us to extend the KMC simulations to the longer evolution times. The results of simulations seem to agree with available experimental data for Fe-Cu alloys within statistical errors of simulations and the scatter of experimental results. Comparison of results of simulations to experiments for some multicomponent Fe-Cu-based alloys enables us to make certain conclusions about the influence of alloying elements in these alloys on the precipitation kinetics at different stages of evolution.Comment: 18 pages, 17 postscript figures, LaTe

Testing of CP, CPT and causality violation with the light propagation in vacuum in presence of the uniform electric and magnetic fields

We have considered the structure of the fundamental symmetry violating part of the photon refractive index in vacuum in the presence of constant electric and magnetic fields. This part of the refractive index can, in principle, contain CPT symmetry breaking terms. Some of the terms violate Lorentz invariance, whereas the others violate locality and causality. Estimates of these effects, using laser experiments are considered.Comment: 12 page

КЛИНИЧЕСКИЙ СЛУЧАЙ УСПЕШНОГО ЛЕЧЕНИЯ ПОДРОСТКА С САРКОМОЙ ЮИНГА IV СТАДИИ

Background. Ewing’s sarcoma is one of the most common musculoskeletal cancers in children and adolescents. Extremely aggressive clinical course of Ewing’s sarcoma makes a successful treatment of this tumor difficult. Despite a comprehensive multidisciplinary approach to the treatment of this cancer, including chemotherapy, surgery and radiation therapy, rapid tumor progression, recurrence and resistance to chemotherapy are still common.Our purpose was to present the results of a personalized approach to multidisciplinary combination treatment for musculoskeletal cancer involving polychemotherapy, 3D conformal radiation therapy and modern surgical technologies.Description of the clinical case. A female patient presented to Rostov Research Institute of Oncology complaining of a tumor and moderate pain in soft tissues of the left iliac region, left lower extremity, and lameness when walking. After complete examination, the patient was diagnosed with Ewing’s sarcoma of the left ilium with lung metastases (Т3N0M1). The patient received 6 cycles of neoadjuvant chemotherapy according to EURO EWING 2008 protocol; tumor progression and lung metastasis were registered. Two cycles of second-line chemotherapy were performed; by the decision of the doctors’ council, the first stage of surgical treatment was performed: resection of the left ilium and the defect replacement with a temporary cement spacer. In the postoperative period, the patient underwent 8 cycles of adjuvant chemotherapy, external beam radiation therapy to the lungs (12 Gy total dose) and the primary tumor (46 iGy total dose), and 12 cycles of supporting therapy. A delayed second reconstructive stage of surgical treatment involved removal of a temporary cement spacer and implantation of an individual pelvic stability system. The patient was followed-up for 25 months after the combination treatment, had no complaints, and was able to ambulate without assistance; the motor function of the left hip joint was fully preserved. Conclusion. The use of non-standard high-technology approaches to surgical treatment of unfavorably localized Ewing’s Sarcoma in combination with chemo-radiation therapy allows patients with advanced tumors to achieve satisfactory results and good quality of life. Актуальность. Саркома Юинга занимает одно из лидирующих мест в онкологической патологии опорно-двигательной системы у детей и подростков. Успешное лечение затрудняет крайне агрессивное течение опухолевого процесса. Несмотря на мультидисциплинарный подход в лечении, включающий наряду с химиотерапевтическим и хирургическим методами лечения лучевую терапию, быстрая генерализация опухолевого процесса, рецидивы и резистентные к химиотерапии формы опухоли попрежнему часты.Целью работы явилось представление результатов персонифицированного подхода в комплексном мультидисциплинарном лечении злокачественной патологии опорно-двигательной системы с использованием многокомпонентной полихимиотерапии, 3D-конформной лучевой терапии и высоких хирургических технологий.Описание клинического случая. Больная обратилась в ФГБУ «РНИОИ» МЗ РФ в апреле 2016 г. с жалобами на наличие опухолевого образования и умеренных болей в мягких тканях левой подвздошной области, левой нижней конечности, хромоту при ходьбе. По данным обследования установлен диагноз: саркома Юинга левой подвздошной кости с метастазами в легкие, IV стадия (Т3N0M1). После 6 курсов неоадъювантной полихимиотерапии, согласно протоколу EWING 2008, отмечено прогрессирование опухоли с метастазами в легкие. Проведено 2 противорецидивных курса полихимиотерапии второй линии, решением консилиума врачей проведен первый этап хирургического лечения: резекция левой подвздошной кости с замещением дефекта временным цементным спейсером. В послеоперационном периоде больной проведено 8 курсов адъювантной полихимиотерапии, ДГТ на область обоих легких (СОД 12 Гр) и зону первичного очага (СОД 46 изоГР), 12 курсов поддерживающей терапии. Выполнен отсроченный реконструктивно-пластический этап хирургического лечения – удаление временного цементного спейсера с установкой индивидуальной тазовой стабилизирующей системы. Больная находится под наблюдением 25 мес после комплексного лечения, жалоб не предъявляет, передвигается самостоятельно, двигательная функция левого тазобедренного сустава сохранена в полном объеме.Заключение. Использование нестандартных высокотехнологичных подходов в хирургическом лечении саркомы Юинга неблагоприятных локализаций в сочетании с химиолучевой терапией позволяет достичь удовлетворительных результатов при лечении больных с распространенным опухолевым процессом и сохранения высокого уровня качества жизни.