Fracture system influence on the reservoirs rock formation of Ordovician-Devonian carbonates in West Siberia tectonic depression

During the Paleozoic period from the beginning of the Cambrian to the end of the Carboniferous in the boundaries of the West Siberia tectonic depression there occurred the sea, where the carbonate platforms were formed by the limestones accumulation. All the area at the end of the Carboniferous period was turned to land. Resulting from Gertsynskaya folding in the times of Permian - Triassic the formed deposits were folded and denudated to a considerable extent. Besides, the reservoir rocks of the crust of weathering including redeposited one, were formed as a result of hypergenesis, during the continental stand of the area in the near-surface zone. A new geological prospecting unit has been suggested which underlies these crusts of weathering and formed during fracture tectonic processes with hydrothermal-metasomatic limestones reworking and the processes of hydrothermal leaching and dolomitization. So, in the carbonate platforms the system of fissure zones related to tectonic disturbance was formed. This has a dendrite profile where the series of tangential, more thinned fractures deviate from the stem and finish in pores and caverns. The carbonate platforms formation in the West Siberia tectonic depression has been analyzed, their dynamics and gradual increasing from the minimal in Ordovician and Silurian to maximal at the end of the Late Devonian has been shown

Studies of Ultrathin Magnetic Films Using Synchrotron Radiation: Resonant Photoemission, Circular and Linear Magnetic Dichroism.

The work described in this dissertation is a study of the relationship between structural, electronic, and magnetic properties of ultrathin films of 3d-transition metals grown epitaxially on Cu substrate. The two systems that we have studied are films of fcc-Co on Cu(001) and Cu(111) and Fe and oxidized Fe films on Cu(001). Both systems are either employed or have potential applications in the data storage industry. In order to provide information on the inter-relationship between the electronic structure and magnetic properties, we present results of magnetic dichroism observed in photoemission from the valence-bands and the shallow 3p core levels of ultrathin films grown on Cu. We have used both linearly and circularly polarized light from the Center for Advanced Microstrucutres and Devices (CAMD) synchrotron source and observe the angular distributions of the photoemitted electrons using a display type analyzer. Magnetic Circular Dichroism (MCD) and Magnetic Linear Dichroism (MLD) phenomena in UV and soft X-ray photoemission were observed in the core and valence-band structures of atomically thin Co/Cu(001), Fe/Cu(001) and Co/Cu(111). The patterns of the magnetic dichroism asymmetry in angular distributions of the photoelectrons in the valence-band photoemission will be discussed. A broad array of techniques including ARUPS, constant initial state (CIS) resonant PES and STM were used to characterize Fe/Cu(001) interface oxidized at elevated temperature. The specific oxide phase, whether FeO(111) or Fe 3O4(111) that forms depends on the initial Fe thickness. Both core level and valence band photoemission data will be presented. Difference spectra show that the interfaces of these films have a metallic density of states at EF, unlike any of the bulk phases of iron oxide. Core level photoemission from Fe 3p levels shows the existence of two distinct Fe oxidation states. CIS resonant photoemission data show that the DOS close Fermi edge can be identified as is mostly due to a contribution of iron oxide states, but not due to Cu states. MCD/MLD data suggest a significant degree of spin polarization at the Fermi edge and a presence of a surface magnetization for these films

Western and non-western leadership styles and employee wellbeing: a case of a high-power distance context

The study combines an emic and etic perspective to test the relationships between three different (Western and non-Western) leadership styles, that is, transformational, authoritarian, and benevolent paternalistic, and follower emotional exhaustion in a high-power distance context of Russia. It employs hierarchical linear modeling (HLM) to analyse a sample of 403 followers to middle-level managers in Russian organizations. The analysis finds only transformational leadership to be generally negatively associated with emotional exhaustion. However, under conditions of high individual-level power distance orientation among followers, this association diminishes whereas that of authoritarian leadership and exhaustion increases. Benevolent paternalistic leadership is unrelated to emotional exhaustion. The study extends research on the relative importance of Western and non-Western leadership behaviors for employee wellbeing in high-power distance contexts and on how this importance differs across followers, thus highlighting the role of follower expectations in determining the effectiveness of leadership. It points toward the need for future research to simultaneously test the contingencies and relative importance of paternalistic, authoritarian, transformational, as well as other leadership styles in various cultures as well as to continue exploring the moderating influence of various cultural value orientations on these leadership styles’ follower effects

Антиоксидантний профіль у щурів з закритою черепно-мозковою травмою при лікуванні цереброгермом

The work is devoted to the research of the condition of the main components of the antioxidant system at the terms of the closed cranial cerebral trauma and at its pharmaceutical correction of Cerebrogermum.  It is determined that in case of using of Cerebrogermum the activity of superoxiddismutasa is rised in the blood serum in average on 35 % concerning the significations of the control group (the closed cranial cerebral trauma without treatment), on 72 hour of experiment the activity of this are fixed in the groups of both intact and reviewer rats. It does not also yield to reviewer preparation the ability of Cerebrogermum to resist to oxidizing stress because of the activity of catalasa. In relation to the estimation of antioxidant activity it considerably outweighs sizes for rats under influence of Cerebrogermum ( in average on 65 %) which are registered in the control group. The received in the experiment data give the basis to assert that the potential cerebral protector owns the exactly ability to resist to oxidative stress that is formed on a background of the mechanical damage of cerebrum.Работа посвящена исследованию состояния ключевых компонентов антиоксидантной системы в условиях закрытой черепно-мозговой травмы и при ее фармакокоррекции цереброгермом. Установлено, что при применении цереброгерма повышается активность супероксиддисмутазы в сыворотке крови в среднем на 35 % относительно значений контрольной группы (закрытая черепно-мозговая травма без лечения), при этом на 72 часу исследования она не имеет достоверной разницы со значениями, зафиксированными в группах как интактных, так и референтных крыс. Не уступает также референтному препарату способность цереброгерма противостоять окислительному стрессу по активности каталазы. Относительно оценки фактора антиоксидантной активности, то он у крыс под влиянием цереброгерма значительно (в среднем на 65 %) превышает величины, зарегистрированные в контрольной группе. Полученные в эксперименте данные дают основания утверждать, что потенциальный церебропротектор обладает выраженной способностью противостоять оксидативному стрессу, который формируется на фоне механического повреждения головного мозга. Роботу присвячено дослідженню стану ключових компонентів антиоксидантної системи за умов закритої черепно-мозкової травми та при її фармакокорекції цереброгермом.Встановлено, що при застосуванні цереброгерму підвищується активність супероксиддисмутази у сироватці крові в середньому на 35 % відносно значень контрольної групи (закрита черепно-мозкова травма без лікування), при цьому на 72-й годині досліду вона не має вірогідної різниці зі значеннями, зафіксованими у групах як інтактних, так і референтних щурів. Не поступається також референтному препарату здатність цереброгерму протистояти окисному стресу за активністю каталази. Щодо оцінки фактора антиоксидантної активності, то він у щурів під впливом цереброгерму значно (в середньому на 65 %) переважає величини, зареєстровані у контрольній групі. Отримані в експерименті дані дають підстави стверджувати, що потенційний церебропротектор володіє виразною здатністю протистояти оксидативному стресу, що формується на тлі механічного пошкодження головного мозку.

ABSTRACT MODELS FOR SYSTEM VIRTUALIZATION

The paper is dedicated to issues of system objects securing (system files and user system or application configuration files) against unauthorized access including denial of service attacks. We have suggested the method and developed abstract system virtualization models, which are used toresearch attack scenarios for different virtualization modes. Estimation for system tools virtualization technology effectiveness is given. Suggested technology is based on redirection of access requests to system objects shared among access subjects. Whole and partial system virtualization modes have been modeled. The difference between them is the following: in the whole virtualization mode all copies of access system objects are created whereon subjects’ requests are redirected including corresponding application objects;in the partial virtualization mode corresponding copies are created only for part of a system, for example, only system objects for applications. Alternative solutions effectiveness is valued relating to different attack scenarios. We consider proprietary and approved technical solution which implements system virtualization method for Microsoft Windows OS family. Administrative simplicity and capabilities of correspondingly designed system objects security tools are illustrated on this example. Practical significance of the suggested security method has been confirmed

Thermocyclic fatigue and destruction of high pressure turbine blades in their critical sections

In the article the critical sections and points at the leading edges of the airfoils of high-pressure turbines were reasonably defined for experimental studies of thermocyclic durability. Experimental studies of thermocyclic durability were performed for the samples of heatproof alloys for the cyclic change parameters in extreme temperatures and thermomechanical stresses that exert at the starting and running down of aircraft gas turbine engines and ground gas turbine power plants. The influence of protective coatings on thermocyclic durability of alloys and parts is mentioned in the article. The article describes the methods of determination the thermal stress in the blades. It is emphasized that extreme thermal stresses of compression in the edges of nozzle vanes and stretch on the pressure side of the airfoil occur on the operating mode "starting", and the cracks are revealed mainly on the mode "shutdown". In the intermediate stages of the flight cycle the do not exceed of the yield strength of the blade material and do not significantly affect there lative thermocycle durability of heatproof alloys. The destruction of the blades of high-pressure turbines in their cross sections along the airfoil shroud platform, in the zone of maximum temperature sand in the root sections explained from the position of the three– and multi component approac

Linking institutional context to the community and career embeddedness of skilled migrants: The role of destination- and origin-country identifications

Supplementary Information is available online at: https://link-springer-com.ezproxytest.brunel.ac.uk/article/10.1057/s41267-024-00683-w#Sec140 .Migration is one of the most pressing global issues of our time. However, relatively little is known about the factors and mechanisms that govern the post-migration experiences of skilled migrants. We adopt an acculturation- and social identity-based approach to examine how differences between institutional characteristics in the destination and origin country, as well as migrants’ experiences with formal and informal institutions shape their identification with the destination and origin country and contribute to their community and career embeddedness. Our study of 1709 highly skilled migrants from 48 origin countries in 12 destination countries reveals that the institutional environment migrants encounter provides both sources of opportunity (potential for human development and value-congruent societal practices) and sources of disadvantage (experienced ethnocentrism and downgrading). These contrasting dynamics affect migrants’ destination-country identification, their origin-country identification and, ultimately, their embeddedness in the destination country. Our results have important implications for multinational enterprises and policy makers that can contribute to enhancing skilled migrants’ community and career embeddedness. For example, these actors may nurture a work environment and provide supportive policies that buffer against the institutional sources of disadvantage we identified in this study, while helping migrants to leverage the opportunities available in the destination country.Open access funding provided by Vienna University of Economics and Business (WU).. Sebastian Reiche gratefully acknowledges the support from the Ministerio de Ciencia e Innovación, grant ECO2015-68272-P funded by MCIN/AEI/https://doi-org.ezproxytest.brunel.ac.uk/10.13039/501100011033, and by “ERDF A way of making Europe”, by the European Union. Mila Lazarova acknowledges the support of the Canada Research Chairs Program. Lena Zander would like to gratefully acknowledge Jan Wallanders och Tom Hedelius stiftelse and Tore Browaldhs stiftelse, Sweden, for financially supporting her research project (P17-0117) and the workshop organized at Sigtuna Folkhögskola for the research team in June, 2022. Eric Davoine gratefully acknowledges the NCCR LIVES for their financial support

Room-temperature spin-orbit torque in NiMnSb

Materials that crystallize in diamond-related lattices, with Si and GaAs as their prime examples, are at the foundation of modern electronics. Simultaneously, inversion asymmetries in their crystal structure and relativistic spin–orbit coupling led to discoveries of non-equilibrium spin-polarization phenomena that are now extensively explored as an electrical means for manipulating magnetic moments in a variety of spintronic structures. Current research of these relativistic spin–orbit torques focuses primarily on magnetic transition-metal multilayers. The low-temperature diluted magnetic semiconductor (Ga, Mn)As, in which spin–orbit torques were initially discovered, has so far remained the only example showing the phenomenon among bulk non-centrosymmetric ferromagnets. Here we present a general framework, based on the complete set of crystallographic point groups, for identifying the potential presence and symmetry of spin–orbit torques in non-centrosymmetric crystals. Among the candidate room-temperature ferromagnets we chose to use NiMnSb, which is a member of the broad family of magnetic Heusler compounds. By performing all-electrical ferromagnetic resonance measurements in single-crystal epilayers of NiMnSb we detect room-temperature spin–orbit torques generated by effective fields of the expected symmetry and of a magnitude consistent with our ab initio calculations.University of WürzburgThis is the author accepted manuscript. The final version is available from Nature Publishing Group via http://dx.doi.org/10.1038/nphys377