The overdamped chiral magnetic wave

About eight years ago it was predicted theoretically that a charged chiral plasma could support the propagation of the so-called chiral magnetic waves, which are driven by the anomalous chiral magnetic and chiral separation effects. This prompted intensive experimental efforts in search of signatures of such waves in relativistic heavy-ion collisions. In fact, several experiments have already reported a tentative detection of the predicted signal, albeit with a significant background contribution. Here, we critically reanalyze the theoretical foundations for the existence of the chiral magnetic waves. We find that the commonly used background-field approximation is not sufficient for treating the waves in hot chiral plasmas in the long-wavelength limit. Indeed, the back-reaction from dynamically induced electromagnetic fields turns the chiral magnetic wave into a diffusive mode. While the situation is slightly better in the strongly-coupled near-critical regime of quark-gluon plasma created in heavy-ion collisions, the chiral magnetic wave is still strongly overdamped due to the effects of electrical conductivity and charge diffusion.Comment: 16 pages, 2 figures. v2: the numerical values of the electrical conductivity are corrected and the results are extended to higher values of the magnetic field. Proceedings of "XIII Quark Confinement and the Hadron Spectrum - Confinement2018", 31 July - 6 August 2018, Maynooth University, Irelan

Determination of Growth Rate of Phases during Phase Transformation in R2Fe14B Type Alloy

The kinetics of hydrogen-induced phase transformation in R2Fe14B type hard magnetiс alloy has been analyzed in the framework of the Kolmogorov’s kinetic model. On the basis of the kinetic theory of Kolmogorov phase transformations has been establisged the dependence of the rate growth of new phases during hydrogen-induced phase transformations in R2Fe14B type in dependence on hydrogen pressure during the transformation.Кинетика индуцированного водородом прямого фазового превращения в магнитотвердом сплаве R2Fe14B проанализирована в рамках кинетической модели Колмогорова. На основе кинетической теории фазовых превращений Колмогорова установлена зависимость скорости роста новых фаз в ходе фазовых превращений в сплаве типа R2Fe14B в зависимости от давления водорода при превращении

The Krasnouralsky profile in the Middle Urals, Russia: A tomographic approach to vintage DSS data

The Middle Urals region has been widely studied with geophysical methods over the past decades. An integrated program is in progress to summarize this knowledge, including modern reprocessing of controlled-source seismic data. This work is devoted to the Krasnouralsky DSS profile. We applied modern tomography inversion algorithms in 2D and 2.5D on first break traveltime picks from an archive catalogue. A number of initial models and various smoothing constraints were used to investigate the influence of starting models on the final model. Robustness and uncertainty of the recovered models were estimated with hypothesis testing and checkerboard tests. The recovered velocity structure shows a thicker crust below the contact of the West Uralian Zone and the Central Uralian Zone and below the Tagil-Magnitogorsk Zone. Deep high velocity anomalies on both sides of this zone are interpreted as crustal thinning or alteration of the crust by intrusions of mantle material. Our results suggest that it is worthwhile reinterpreting DSS traveltime data with modern inversion techniques. © 2008 Elsevier B.V. All rights reserved

Performance of ZnSe-based scintillators at low temperatures

Applications that utilize scintillation detectors at low temperatures are growing in number. Many of these require materials with high light yield and a fast response. Here we report on the low-temperature characterisation of ZnSe doped with Al or Te, respectively. The X-ray luminescence and decay curves were measured over the 77–295 K temperature range, and alpha particle excitation was used to examine scintillation light output and decay kinetics over the range 9–295 K. A significant improvement of the scintillation characteristics was observed at cooling below 100 K. The scintillation light yield of the crystals increases by a factor about two, and the decay time constant decreases by almost an order of magnitude to 0.3–0.4 μs. These improvements enhance the potential of ZnSe-based crystals for application in cryogenic scintillation detectors of ionising radiation

Performance of ZnSe-based scintillators at low temperatures

Applications that utilize scintillation detectors at low temperatures are growing in number. Many of these require materials with high light yield and a fast response. Here we report on the low-temperature characterisation of ZnSe doped with Al or Te, respectively. The X-ray luminescence and decay curves were measured over the 77–295 K temperature range, and alpha particle excitation was used to examine scintillation light output and decay kinetics over the range 9–295 K. A significant improvement of the scintillation characteristics was observed at cooling below 100 K. The scintillation light yield of the crystals increases by a factor about two, and the decay time constant decreases by almost an order of magnitude to 0.3–0.4 μs. These improvements enhance the potential of ZnSe-based crystals for application in cryogenic scintillation detectors of ionising radiation

Clinical case of ectopic pregnancy in the fallopian tube stump

Here we describe a rare clinical case of female with a history of surgical sterilization coupled to ectopic pregnancy in the fallopian tube stump, comprising on average 1.19 % of total ectopic pregnancies. The patient E. was admitted to the gynecological department complaining of aching pain in the lower left abdominal quadrant, blood discharge from the genital tract, and delayed menstruation. Due to a previous operation for sterilization, no onset of pregnancy was expected. A positive urinary test for human chorionic gonadotropin was obtained, whereas ultrasound examination did not reliably confirm the onset of pregnancy. However, taking into account the ultrasound signs of the hematoperitoneum, a culdocentesis was performed that revealed dark liquid non-clotting blood. Laparoscopic surgery was performed on emergency indications. Intraoperatively: the stump of the left fallopian tube was dilated, cyanotic, and blood was leaking from the fimbria lend. Bilateral excision of fallopian tube stumps was performed. The primary clinical diagnosis was interrupted left-sided tubal pregnancy (in the fallopian tube stump) that was confirmed by pathomorphological examination. Thus, the clinical case described by us demonstrates properly conducted differential diagnostics as well as timely management and therapeutic interventions. Hence, previous surgical sterilization recorded in patient history should not rule out a diagnosis of ectopic pregnancy

Ectopic pregnancy in the uterus scar left after cesarean section: a clinical case

The article describes a rare clinical case of ectopic pregnancy in the uterine scar left after a cesarean section. The case demonstrates the complexity of diagnosing this abnormality and managing such patients. The proposed approach allowed us to diagnose pregnancy in the uterus scar in due time, avoid hysterectomy, and preserve the reproductive organ