Hybrid approach to calculating proton stopping power in hydrogen

Proton stopping power in hydrogen is calculated using a hybrid method. A two-centre convergent close-coupling method is used for calculations involving the proton fraction of the beam, while the Born approximation is used for the hydrogen fraction. For proton-hydrogen collisions rearrangement processes are explicitly included via a two-centre expansion. Hydrogen-hydrogen collisions are calculated including one- and two-electron processes. Despite using the first-order approximation in the hydrogen-hydrogen channel, overall reasonably good agreement with experiment is seen above 100 keV. © Published under licence by IOP Publishing Ltd

Application miniinvasive of methods in treatment of liver cirrhosis complicated diureticoresistant ascites

The purpose of our work - to estimate results and to define efficiency of the advanced method of correction diurecoresistant ascites at liver cirrhosis with syndrome of portal hypertensia with application completely implanted peritoneal port-system Celsite®. In this work it is presented the analysis of results of treatment 54 patients of liver cirrhosis with portal hypertension syndrome complicated diureticoresistant ascites, in which treatment 12 patients is implanted peritoneal port-system Celsite of firm B/Braun and in 42 supervision the operation - peritoneovenosis shunts by the valve Le Veen. The comparative analysis of the received data has shown the best results in group of the patients with implanted peritoneal of port-system. Use peritoneal of ports allows to carry out ascitereinfusion with portiones doses, that at the end excludes occurrence of serious complications as haemorrogical syndrome, connected with haemodileishin and coagulopation on ground of massive receipt ascites of contents in venosis a channel.Цель нашей работы - оценить результаты и определить эффективность усовершенствованного метода коррекции диуретикорезистентного асцита у больных циррозом печени синдромом портальной гипертензии с применением полностью имплантируемой перитонеальной порт-системы Celsite®. В работе представлен анализ результатов лечения 54 больных циррозом печени с синдромом портальной гипертензии осложненным диуретикорезистентым асцитом, в лечении которого у 12 больных произведена имплантация перитонеальной порт-системы Celsite® фирмы В/Вгаип и в 42 наблюдениях выполнена операция — перитонеовенозное шунтирование клапаном Левина. Сравнительный анализ полученных данных показал наилучшие результаты в группе больных с имплантацией перитонеальной порт-системы. Использование перитонеальных портов позволяет осуществить асцитореинфузию дробно, дозировано, что в конечном итоге исключает возникновение серьезных осложнений в виде геморрагического синдрома, связанных с гемодилюцией и коагулопатией на почве массивного поступления асцитического содержимого в венозное русло

Results of application miniinvasive operations in treatment of bleedings from varix expanded veins of the gullet and the stomach at patients with liver cirrhosis

The purpose of research - to define efficiency conservative, miniinvasive and separating interventions in preventive maintenance and treatment of syndrome of bleeding at patients with liver cirrhosis by the comparative analysis, an estimation of results and application infusion port-system Celsite. In this work it is presented comparative analyze of the results and efficiency of different methods of gemostasis in the treatment 393 patients with liver cirrhosis complicated with bleeding from varix of esophagus and stomach. 155 patients was passed conservative therapy, 128- made Patsiora's operation, 87- endoscope sclerosis of varix and 23 patients was implanted infusion port-system Celsite with the combination of endoscope scleratherapy. Most steady positive result was in group of patients with implantation of infusion port system in combination with endoscope scleratherapy, where efficiency hemostasis was in 93,8% case. Relapse of bleeding was in 6.2% case, lethality is not marked. It was proved high efficiency and advantages of endoscope scleratherapy of varix in combination with infusion port-system in the treatment of patients with liver cirrhosis complicated bleeding syndrome.Цель исследования - определить эффективность консервативных, миниинвазивных и разобщающих вмешательств в профилактике и лечении синдрома кровотечения у больных циррозом печени путем сравнительного анализа, оценки результатов и применением инфузионной порт-системы Celsite®. В работе представлен сравнительный анализ результатов и эффективность различных методов гемостаза в лечении 393 больных циррозом печени осложненным кровотечением из варикозно расширенных вен пищевода и желудка. 155 больным была проведена консервативная терапия, 128 - выполнена операция Пациоры, 87 - эндоскопическое склерозирование варикозных узлов и 23 больным произведена имплантация инфузионной порт-системы Celsite® в сочетании с эндоскопической склеротерапией. Наиболее устойчивый положительный результат получен в группе больных, где проведена имплантация инфузионной порт-системы в комбинации с эндоскопической склеротерапией, где эффективный гемостаз достигнут в 93,8% случаях. Рецидив кровотечения возник в 6,2% наблюдениях, летальность не отмечена

Fully quantum-mechanical treatment of proton-hydrogen scattering

© Published under licence by IOP Publishing Ltd. A fully quantum-mechanical convergent close-coupling approach to proton collisions with atomic hydrogen has been developed. Cross sections for target ionisation and electron capture by the projectile have been calculated in the energy range from 20 keV to 1 MeV. Calculated electron capture cross sections are in good agreement with the experiment, however for ionisation discrepancies between theory and experiment at intermediate energies still remain

Close-coupling approach to antiproton-impact ionisation of H2 with analytical spherical averaging

Integrated cross section for single ionisation of molecular hydrogen by antiproton impact has been calculated in a wide range of impact energies from 1 keV up to 2 MeV using a close-coupling approach. For the first time all possible orientations of the molecular target have been accounted for using an ab initio analytical spherical averaging technique. Obtained results are in good agreement with experiment

Calculation of antihydrogen formation via antiproton scattering with excited positronium

Detailed presentation of results shown in the ealrier Phys. Rev. Lett. (114, 183201, (2015)).Shows all partial cross sections for antihydrogen formation in collisions of antiprotons with positronium in quantum states n = 1-3

Ionisation of noble gas atoms and H2O by antiproton impact

© Published under licence by IOP Publishing Ltd. A time-dependent convergent close-coupling approach to antiproton collisions with noble gas atoms and H2O has been developed using a fully multielectron treatment of the targets. Integrated cross sections for single ionisation have been calculated in a wide range of impact energies from 5 keV up to 2 MeV. Obtained results are in good agreement with experiment

The Hilbert-Schmidt Theorem Formulation of the R-Matrix Theory

Using the Hilbert-Schmidt theorem, we reformulate the R-matrix theory in terms of a uniformly and absolutely convergent expansion. Term by term differentiation is possible with this expansion in the neighborhood of the surface. Methods for improving the convergence are discussed when the R-function series is truncated for practical applications.Comment: 16 pages, Late

СЛУЧАЙ НЕОБЫЧНОГО АЛЬВЕОКОККОВОГО ПОРАЖЕНИЯ ПЕЧЕНИ

A clinical observation of a patient with lingering, asymptomatic clinical course of unusual and rare form of alveolar disease of liver, evidencing of significant diagnostic complexities and successful treatment, is given in the article.В статье приводится клиническое наблюдение пациентки с длительным бессимптомным течением необычной и редкой формой альвеококкоза печени, свидетельствующее о значительных диагностических сложностях и успешном излечении

Deuteron and antideuteron production in Au+Au collisions at sqrt(s_NN)=200 GeV

The production of deuterons and antideuterons in the transverse momentum range 1.1 < p_T < 4.3 GeV/c at mid-rapidity in Au + Au collisions at sqrt(s_NN)=200 GeV has been studied by the PHENIX experiment at RHIC. A coalescence analysis comparing the deuteron and antideuteron spectra with those of protons and antiprotons, has been performed. The coalescence probability is equal for both deuterons and antideuterons and increases as a function of p_T, which is consistent with an expanding collision zone. Comparing (anti)proton yields p_bar/p = 0.73 +/- 0.01, with (anti)deuteron yields: d_bar/d = 0.47 +/- 0.03, we estimate that n_bar/n = 0.64 +/- 0.04.Comment: 326 authors, 6 pages text, 5 figures, 1 Table. Submitted to PRL. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.htm