Segmentation effect on inhomogeneity of [110]-single crystal deformation

This work presents a detailed analysis of segmentation process in FCC single crystals with compression axis [110] and side faces( ̅110) and (001) considering effect of octahedral shear crystal-geometry and basic stress concentrators. Sequence of meso-band systems formation on side faces is determined. Macro-segmentation patterns are specified, that are common to the FCC single crystals under investigation. It is proved that rectangular shape of highly compressed crystals, elongated in direction of operating planes, is conditioned by orientation symmetry of compression axis, single crystal side faces and shears directions, which are characteristic for the given orientation. The specified patterns are characteristic only for the samples with initial height-to-width ratio equal to 2. When varying sample height relative to the initial one, segmentation patterns will also vary due to crystal geometry variations

МОДЕЛЮВАННЯ АНТИКОРОЗІЙНОГО ЗАХИСТУ МАТЕРІАЛУ ОБСАДНОЇ КОЛОНИ В ЛАБОРАТОРНИХ УМОВАХ

The materials are presented simulation of anti-corrosion protection of covering material in laboratory conditions. The conditions of operation of the equipment of the field under the conditions of water pressure regime of oil extraction are considered. Factors of corrosion destruction of oilfield equipment are temperature, aggressive formation ions and associated acid gases CO2 and H2S. The possibility  of  using  advanced  potentiostatic method  to  study  the  protective  action  of  cement  stone  obtained  from  a  mixture  of cemented materials in order to increase the corrosion resistance of the structures is demonstrated. It has been shown that additives of  coke-chemical  products to  the  composition  of  the  cementations  mortar  composition  can  increase the  protective  properties  of cement stone during tamping of wells, which are operated in difficult mountain-geological conditions.Рассматриваются условия функционирования оборудования месторождения в условиях водонапорного режима извлечения нефти. Факторами коррозионного разрушения нефтепромыслового оборудования является температура, агрессивные ионы пластовой воды и сопутствующие кислые газы СО 2  и H 2 S. Показана возможность использования усовершенствованного потенциостатического  метода  для  исследования  защитного  действия  цементного  камня,  полученного  из  смеси тампонажных  материалов  для  повышения  коррозионной  стойкости  конструкционных  сталей  в  сложных  условиях эксплуатации.  Показано,  что  добавки  коксохимических  продуктов  в  состав  композиции  тампонажных  растворов  могут повышать  защитные  свойства  цементного  камня  при  тампонаже  скважин,  эксплуатируемых  в  сложных  горно-геологических условиях.Розглядаються  умови  функціонування  обладнання  родовища  в  умовах  водонапірного  режиму  вилучення  нафти. Факторами  корозійного  руйнування  нафтопромислового    обладнання  є  температура  ,агресивні  іони  пластової  води    та  супутні  кислі  гази  СО 2   і  H 2 S.  Показана  можливість  використання  удосконаленого  потенціостатичного  методу  для дослідження захисної дії цементного каменю, отриманого із суміші тампонажних матеріалів, для підвищення корозійної стійкості  конструкційних  сталей  в  складних  умовах  експлуатації.  Показано,  що  добавки    коксохімічних  продуктів  до складу  композиції  тампонажних розчинів  можуть    підвищувати захисні  властивості  цементного  каменю при тампонажі свердловин, які  експлуатуються в складних гірсько-геологічних  умовах.

ADHERE: randomized controlled trial comparing renal function in de novo kidney transplant recipients receiving prolonged-release tacrolimus plus mycophenolate mofetil or sirolimus

ADHERE was a randomized, open-label, Phase IV study comparing renal function at Week 52 postkidney transplant, in patients who received prolongedrelease tacrolimus-based immunosuppressive regimens. On Days 0?27, patients received prolonged-release tacrolimus (initially 0.2 mg/kg/day), corticosteroids, and mycophenolate mofetil (MMF). Patients were randomized on Day 28 to receive either prolonged-release tacrolimus plus MMF (Arm 1) or prolongedrelease tacrolimus (?25% dose reduction on Day 42) plus sirolimus (Arm 2). The primary endpoint was glomerular filtration rate by iohexol clearance (mGFR) at Week 52. Secondary endpoints included eGFR, creatinine clearance (CrCl), efficacy failure (patient withdrawal or graft loss), and patient/graft survival. Tolerability was analyzed. The full-analysis set comprised 569 patients (Arm 1: 287; Arm 2: 282). Week 52 mean mGFR was similar in Arm 1 versus Arm 2 (40.73 vs. 41.75 ml/min/1.73 m2; P = 0.405), as were the secondary endpoints, except composite efficacy failure, which was higher in Arm 2 versus 1 (18.2% vs. 11.5%; P = 0.002) owing to a higher postrandomization withdrawal rate due to adverse events (AEs) (14.4% vs. 5.2%). Results from this study show comparable renal function between arms at Week 52, with fewer AEs leading to study discontinuation with prolonged-release tacrolimus plus MMF (Arm 1) versus lower dose prolonged-release tacrolimus plus sirolimus (Arm 2)

CHANGE OF THE FLOODPLAIN AREAS ALONG SOME RIVERS OF THE VOLGA RIVER BASIN

The estimation of the area of the territories which are under the threat of flooding is of great importance. The technique, based on a principle of conformity of the area of a floodplain massif, averaged within the part of the river with a particular rank, to this rank has been proposed. The ranks, according to the Scheidegger scheme, were calculated for the mouths of 9907 rivers in the Volga river basin. For 96 rivers of the Volga basin, which has length of more than 200 km, changes of rank within the entire extent were calculated and a map was compiled using the obtained results.For several rivers in the Volga river basin, change of the average floodplain areas along the rivers was estimated. It allowed establishing dependences between the average floodplain areas and the ranks of the rivers, with higher rank corresponding to bigger floodplain areas

On the issue of developing urban infrastructure for electric vehicles

The work is devoted to the development of infrastructure for recharging electric vehicles. The relevance of the use of electric vehicles and the need to provide means of recharging their batteries are considered. The article provides an economic justification for the use of electric vehicles in an urban environment. A concept has been proposed for using electric charging stations at night in the parking lots of apartment buildings. Recommendations and justification for the use of Mode 1 charging stations are given

Observation of Fano line shape in directional fluorescence emission mediated by coupled planar waveguide modes and interpretation based on Lorentz reciprocity

Using a reverse attenuated-total-reflection geometry, we measured angle-scan fluorescence emission spectra of all-dielectric multilayer samples containing a waveguide layer doped with fluorescent dye molecules (fluorescent waveguide layer). A sample containing only one fluorescent waveguide layer showed a highly directional emission spectrum with a Lorentzian line shape caused by the radiative decay of an excited planar waveguide mode into a traveling wave in a decoupling prism. Addition of another waveguide layer containing absorptive dye molecules was found to greatly modify the spectrum and generate a Fano line shape in the emission spectrum. The observed Lorentzian and Fano emission spectra could be well reproduced by electromagnetic calculations based on the Lorentz reciprocity theorem. Calculated results of electric field distributions indicate that the Fano line shape is generated by the suppression of local electric fields inside the fluorescent waveguide layer resulting from coupling between two waveguide modes

МОДЕЛЮВАННЯ АНТИКОРОЗІЙНОГО ЗАХИСТУ МАТЕРІАЛУ ОБСАДНОЇ КОЛОНИ В ЛАБОРАТОРНИХ УМОВАХ

The materials are presented simulation of anti-corrosion protection of covering material in laboratory conditions. The conditions of operation of the equipment of the field under the conditions of water pressure regime of oil extraction are considered. Factors of corrosion destruction of oilfield equipment are temperature, aggressive formation ions and associated acid gases CO2 and H2S. The possibility  of  using  advanced  potentiostatic method  to  study  the  protective  action  of  cement  stone  obtained  from  a  mixture  of cemented materials in order to increase the corrosion resistance of the structures is demonstrated. It has been shown that additives of  coke-chemical  products to  the  composition  of  the  cementations  mortar  composition  can  increase the  protective  properties  of cement stone during tamping of wells, which are operated in difficult mountain-geological conditions.Рассматриваются условия функционирования оборудования месторождения в условиях водонапорного режима извлечения нефти. Факторами коррозионного разрушения нефтепромыслового оборудования является температура, агрессивные ионы пластовой воды и сопутствующие кислые газы СО 2  и H 2 S. Показана возможность использования усовершенствованного потенциостатического  метода  для  исследования  защитного  действия  цементного  камня,  полученного  из  смеси тампонажных  материалов  для  повышения  коррозионной  стойкости  конструкционных  сталей  в  сложных  условиях эксплуатации.  Показано,  что  добавки  коксохимических  продуктов  в  состав  композиции  тампонажных  растворов  могут повышать  защитные  свойства  цементного  камня  при  тампонаже  скважин,  эксплуатируемых  в  сложных  горно-геологических условиях.Розглядаються  умови  функціонування  обладнання  родовища  в  умовах  водонапірного  режиму  вилучення  нафти. Факторами  корозійного  руйнування  нафтопромислового    обладнання  є  температура  ,агресивні  іони  пластової  води    та  супутні  кислі  гази  СО 2   і  H 2 S.  Показана  можливість  використання  удосконаленого  потенціостатичного  методу  для дослідження захисної дії цементного каменю, отриманого із суміші тампонажних матеріалів, для підвищення корозійної стійкості  конструкційних  сталей  в  складних  умовах  експлуатації.  Показано,  що  добавки    коксохімічних  продуктів  до складу  композиції  тампонажних розчинів  можуть    підвищувати захисні  властивості  цементного  каменю при тампонажі свердловин, які  експлуатуються в складних гірсько-геологічних  умовах.

Segmentation effect on inhomogeneity of [110]-single crystal deformation

This work presents a detailed analysis of segmentation process in FCC single crystals with compression axis [110] and side faces( ̅110) and (001) considering effect of octahedral shear crystal-geometry and basic stress concentrators. Sequence of meso-band systems formation on side faces is determined. Macro-segmentation patterns are specified, that are common to the FCC single crystals under investigation. It is proved that rectangular shape of highly compressed crystals, elongated in direction of operating planes, is conditioned by orientation symmetry of compression axis, single crystal side faces and shears directions, which are characteristic for the given orientation. The specified patterns are characteristic only for the samples with initial height-to-width ratio equal to 2. When varying sample height relative to the initial one, segmentation patterns will also vary due to crystal geometry variations