Abstract
Photons serve as valuable probes of the properties of the hot and dense nuclear matter created in collisions of heavy ions. Thermal photon spectra at RHIC and LHC energies indicate that the ...temperature of the produced medium far exceeds the temperature of the phase transition to the quark-gluon plasma in lattice QCD calculations. Measurements of thermal photon spectra in heavy ion collisions at lower energies at the future NICA collider may help to trace the transition from partonic to hadronic degrees of freedom. In this contribution, feasibility studies on thermal photon measurements using the photon conversion method in the future MPD experiment at NICA will be reviewed. In this work, a possibility to increase photon reconstruction efficiency with a dedicated conversion layer is presented and feasibility to probe the material budget of the experiment with converted photons is discussed.
Abstract
Coal fly ash is a hazardous waste of heat power engineering. The complex processing of it includes several stages, such as carbon flotation and magnetic separation of iron. This study ...focuses on carbon extraction by flotation method and iron by magnetic separation method from Kashirskaya GRES coal fly ash with subsequent reduction smelting of it. At optimal conditions were obtained carbon concentrate with 37% C and magnetic concentrate with 61% Fe
2
O
3
. The high-quality steelmaking pig iron with low P and S and high alumina slag were obtained at 1400 °C after reduction smelting mixture magnetic, and carbon concentrates.
Renal cell carcinoma with inferior vena cava (IVC) thrombosis is a rare disease with a poor prognosis without surgical treatment. The presence of a tumor thrombus in the cavity of the main vessel in ...most cases is accompanied by massive bleeding during thrombectomy. To reduce the volume of blood loss, it is possible to use cardiopulmonary bypassto reduce the potential risks associated with blood loss and unstable hemodynamics. Sometimes tumor thrombosis can be growth into the vein wall or lead to occlusion IVC, we consider that it’s indication for resection of the IVC. Thrombectomy with laparotomy access can be performed even with type IV tumor thrombosis, if the thrombus is not fixed to the wall of the suprarenal IVC and surgeon have enough view of suprarenal segment.
This article presents a variant of surgical treatment of patients with right kidney cancer, type IV IVC thrombosis, occlusion infrarenal IVC and ileofemoral thrombosis. In both cases we made resection IVC – infrarenal segment in first case and suprarenal segment in second case.
Abstract
The results of oxidation of a propane-butane mixture (liquefied petroleum gas) with oxygen in a barrier discharge plasma in the presence of liquid octane are presented. The transformation of ...the initial mixture results in the formation of predominantly hydroxyl and carbonyl compounds of the initial gaseous C
3
-C
4
hydrocarbons. The mechanism of hydrocarbon oxidation is similar to that of transformation of liquid hydrocarbons in the barrier discharge plasma. An increase in the initial concentration of the propane-butane mixture in the gas phase results in a decrease in the conversion of gaseous hydrocarbons and octane in one pass through the reactor. Calculations performed using the Bolsig+ program show that a reduction in conversion of gaseous hydrocarbons is due to a decrease in the rate constant of the oxygen dissociation reaction resulted from a decrease in the average electron energy from 4.1 to 3.4 eV. A mathematical expression is proposed, which allows predicting the direction of the plasma-chemical reaction.
The results of oxidation of a propane-butane mixture (liquefied petroleum gas) with oxygen in a barrier discharge plasma in the presence of liquid octane are presented. The transformation of the ...initial mixture results in the formation of predominantly hydroxyl and carbonyl compounds of the initial gaseous C3-C4 hydrocarbons. The mechanism of hydrocarbon oxidation is similar to that of transformation of liquid hydrocarbons in the barrier discharge plasma. An increase in the initial concentration of the propane-butane mixture in the gas phase results in a decrease in the conversion of gaseous hydrocarbons and octane in one pass through the reactor. Calculations performed using the Bolsig+ program show that a reduction in conversion of gaseous hydrocarbons is due to a decrease in the rate constant of the oxygen dissociation reaction resulted from a decrease in the average electron energy from 4.1 to 3.4 eV. A mathematical expression is proposed, which allows predicting the direction of the plasma-chemical reaction.
In order to meet the requirements of ATLAS experiment data taking, the Trigger-DAQ (TDAQ) system is composed of O(10000) of applications running on more than 2600 computers in a network. With such a ...system size, software and hardware failures are quite frequent. To minimize system downtime, the Trigger-DAQ control system shall include advance verification and diagnostics facilities. The operator shall use tests and expertise of the TDAQ and detectors developers in order to diagnose and recover from errors, if possible automatically. The TDAQ control system is built as a distributed tree of controllers, where the behavior of each controller is defined in a rule-based language allowing easy customization. The control system also includes a verification framework which allows users to develop and configure tests for any component in the system with different levels of complexity. It can be used as a stand-alone test facility for a small detector installation, as part of the general TDAQ initialization procedure, and for diagnosing problems which may occur during run time. The system is currently being used in TDAQ commissioning at the ATLAS experimental zone and by subdetectors for stand-alone verification of the detector hardware before it is finally installed.
The paper considers several examples of non-Debye dielectric response in complex heterogeneous media. The percolation phenomenon and Cole–Cole relaxation in disordered matter are discussed in detail. ...The proposed models are illustrated by different sample systems: ionic microemulsions, porous glasses, porous silicon, polymer–water mixtures, and polymer–microcomposite materials. The models enable us to establish the relationship between the parameters of dielectric relaxation broadening, structural properties of the media and transport features of charge carriers in the considered systems. In addition, the origins of “strange kinetic” phenomena were discussed based on statistical physics and fractional time evolution ideas.
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