Complex Material and Surface Analysis of Anterolateral Distal Tibial Plate of 1.4441 Steel

Nickel-based austenitic stainless steels are still common for manufacture of implants intended for acute hard tissue reinforcement or stabilization, but the risk of negative reactions due to soluble nickel-rich corrosion products must be considered seriously. Corrosion processes may even be accelerated by the evolution of microstructure caused by excessive heat during machining, etc. Therefore, this study also deals with the investigation of microstructure and microhardness changes near the threaded holes of the anterolateral distal tibial plate containing approx. 14wt.% Ni by composition. There were only insignificant changes of microhardness, grain size, or microstructure orientation found close to the area of machining. In addition, wettability measurements of surface energy demonstrated only minor differences for bulk material and areas close to machining. The cyclic potentiodynamic polarization tests were performed in isotonic physiological solution. The first cycle was used for the determination of corrosion characteristics of the implant after chemical passivation, the second cycle was used to simulate real material behavior under the condition of previous surface damage by excessive pitting corrosion occurring during previous polarization. It was found that the damaged and spontaneously repassived surface showed a three-time higher standard corrosion rate than the “as received” chemically passivated surface. One may conclude that previous surface damage may decrease the lifetime of the implant significantly and increase the amount of nickel-based corrosion products distributed into surrounding tissues.

PARGOD (WORLD CURTAIN) AND THE NOVEL «DOCTOR ZHIVAGO» BY BORIS PASTERNAK

Boris Pasternak argued that no one understood that in his main novel a certain philosophy was set forth, the essence of which was that the true world was closed to us by a swaying curtain. Other poets clearly saw the same images of the world fabric, woven from threads, which closes true being from us. There is a similar superstring theory in modern physics. The search for this idea in an explicit form in the writer’s works ended in a negative result. Then the subject of analysis was literary criticism, which dealt with the curtain, fabric and threads mentioned in the novel or told about its cryptosemantics. The metaphorical change in the properties of things and the blurring of their boundaries was considered a manifestation of their unity in the other world. Critics tried to consider the idea of ??Pasternak in the contest of the Plato“s cave as a symbol of the division of the world into the illusory and true ones, etc. However, none of the critics could find in the novel the hidden content the novel“s author spoke about. Instead, critics saw in the novel such meanings and images that were completely absent in it. The article concludes that if the hidden meaning does exist in the novel, it is not explicated in any way. At the same time, it may be assumed that the idea of ??the threads of the world came to Pasternak, as it was with other poets, in the his poiesis insight of clairvoyance. At the same time, the article concluded that in Pasternak”s case the real, material world as a curtain-world disappears by itself due to the destructive action of the revolution. In addition to the world of things, in the war, from the lack of food, frosts and epidemics, the heroes of the novel and Zhivago himself die. The main character from «Zhivago» (Аlive) gradually turned into the “Mertvago” (Unalive), what allows Me author to consider the novel a guilty verdict of social revolution. Of course, for the apologists of the «Russian World» it would be tempting to interpret the fall of the curtain (the disappearance of the world of things) as opening to Russians by catharsis the true Divine World, but when noble people disappeared and Ham began to rule everywhere, in Russia there was no one who would and could cognize this Divine World.

Women, Mothers and Citizens: Lone Mothers' Narratives in the Context of New Zealand Welfare Reform

<p>As in other late modern societies with a history of liberal welfarism, 'lone mothers' in New Zealand occupy contested subject positions. On the one hand, lone parenting is understood as the outcome of broader changes in family life and gender relations, and in particular, the emergence of new forms of intimacy as people seek relationships to sustain individual identity projects. On the other hand, in the context of neo-liberal welfare discourses, lone mothers are constructed as a problematic Other, categorically different to 'ordinary' women, mothers and citizens. In New Zealand, welfare reform discourses have constructed women who parent alone as 'particular types of people', and subjected lone mothers to welfare reforms that have had real material effects in their everyday lives. The construction of lone mothers as Other is not only a product of neo-liberal welfare reform discourses. Rather, the ways in which women who parent alone are 'made up' as particular types of people is historically specific. This thesis situates current discourses around lone mothering in New Zealand in the context of a hierarchy of maternal legitimacy that has produced historically specific subjects through a number of traditional, modern and late modern subjectification discourses. Discourses have effects, both materially and in terms of the subjectivity and experience of the people 'made up'. This thesis offers an analysis of the narratives of twenty-one lone mothers in the context of New Zealand welfare reform. In particular, the ways in which women who parent alone make sense of becoming lone mothers, of being 'different' in negotiating the social identity of mother, and of the materiality of the experience of parenting alone are examined. The thesis argues that when narrating experience, women who parent alone enact particular narratives in the form of validation stories. Validation stories are drawn from an amalgam of discourses that both construct lone mothers as particular types of people and shape the material conditions of lone mothers' lives. In enacting validation stories, women who parent alone negotiate these discourses, producing narratives to make sense of their experience and position themselves as ordinary women, mothers and citizens. In this sense, validation stories are narratives that ameliorate the oppressive effects of welfare reform discourses that relentlessly shape lone mothers' lives. The thesis concludes that although validation stories make the lives of lone mothers more 'liveable', sociological theorising around changes in family life must critique claims of individualization as a benign tendency of late modernity, and attend empirically to the ways in which persistent gendered inequalities in family life are both discursively legitimated and reproduced, and continue, for example, to discriminate against lone mothers.</p>

Women, Mothers and Citizens: Lone Mothers' Narratives in the Context of New Zealand Welfare Reform

<p>As in other late modern societies with a history of liberal welfarism, 'lone mothers' in New Zealand occupy contested subject positions. On the one hand, lone parenting is understood as the outcome of broader changes in family life and gender relations, and in particular, the emergence of new forms of intimacy as people seek relationships to sustain individual identity projects. On the other hand, in the context of neo-liberal welfare discourses, lone mothers are constructed as a problematic Other, categorically different to 'ordinary' women, mothers and citizens. In New Zealand, welfare reform discourses have constructed women who parent alone as 'particular types of people', and subjected lone mothers to welfare reforms that have had real material effects in their everyday lives. The construction of lone mothers as Other is not only a product of neo-liberal welfare reform discourses. Rather, the ways in which women who parent alone are 'made up' as particular types of people is historically specific. This thesis situates current discourses around lone mothering in New Zealand in the context of a hierarchy of maternal legitimacy that has produced historically specific subjects through a number of traditional, modern and late modern subjectification discourses. Discourses have effects, both materially and in terms of the subjectivity and experience of the people 'made up'. This thesis offers an analysis of the narratives of twenty-one lone mothers in the context of New Zealand welfare reform. In particular, the ways in which women who parent alone make sense of becoming lone mothers, of being 'different' in negotiating the social identity of mother, and of the materiality of the experience of parenting alone are examined. The thesis argues that when narrating experience, women who parent alone enact particular narratives in the form of validation stories. Validation stories are drawn from an amalgam of discourses that both construct lone mothers as particular types of people and shape the material conditions of lone mothers' lives. In enacting validation stories, women who parent alone negotiate these discourses, producing narratives to make sense of their experience and position themselves as ordinary women, mothers and citizens. In this sense, validation stories are narratives that ameliorate the oppressive effects of welfare reform discourses that relentlessly shape lone mothers' lives. The thesis concludes that although validation stories make the lives of lone mothers more 'liveable', sociological theorising around changes in family life must critique claims of individualization as a benign tendency of late modernity, and attend empirically to the ways in which persistent gendered inequalities in family life are both discursively legitimated and reproduced, and continue, for example, to discriminate against lone mothers.</p>

Breaking with the Family Form: Historical Categories, Social Reproduction, and Everyday Life in Late 1950s Rural China

This article explores the way PRC historians use analytical categories by looking at the emergence of a divide between production and the social reproduction of labor (all the work that goes into producing and raising laborers) that transformed and structured rural everyday life during the Mao period. Everyday life is historical, produced in different ways under different material conditions, structured and shaped by social forms in motion. Thus, it is not an analytical frame through which historians can view the real content of the Mao period underneath the thin veneer of Maoist high politics and its categories. This article therefore argues that everyday life, far from a sphere resisting the impositions and dictates of the state, is fully implicated in the political-economic structuring of society. This is a call to not simply replace an earlier social science focus on the political economy of the PRC with a bottom-up or empirical view of everyday life, recognizing that everyday life is already a structured terrain. Rather than bringing in social science analytical categories from the outside or searching for an empirical real view from below, we need to investigate the emergence of categories and social forms from the real material limits and tendencies of a rapidly changing PRC society.

Topological Anderson Insulator in Cation-Disordered Cu2ZnSnS4

We present the first candidate for the realization of a disorder-induced Topological Anderson Insulator in a real material system. High-energy reactive mechanical alloying produces a polymorph of Cu2ZnSnS4 with high cation disorder. Density functional theory calculations show an inverted ordering of bands at the Brillouin zone center for this polymorph, which is in contrast to its ordered phase. Adiabatic continuity arguments establish that this disordered Cu2ZnSnS4 can be connected to the closely related Cu2ZnSnSe4, which was previously predicted to be a 3D topological insulator, while band structure calculations with a slab geometry reveal the presence of robust surface states. This evidence makes a strong case in favor of a novel topological phase. As such, the study opens up a window to understanding and potentially exploiting topological behavior in a rich class of easily-synthesized multinary, disordered compounds.

Christian-Muslim Relations in the Shadow of Conflict

In February 2000, large-scale Christian-Muslim riots shook the Nigerian city of Kaduna, killing thousands of people and displacing tens of thousands more. Drawing on original survey data from a random sample of three hundred young men living in particularly conflict-prone neighborhoods in Kaduna, the chapter analyzes patterns of Christian-Muslim relations fifteen years after the February 2000 crisis. The author argues that local exposure to deadly intergroup violence continues to have profoundly negative effects on intergroup relations nearly two decades later. Kaduna residents on either side of the religious divide continue to exhibit high levels of mistrust and prejudice against members of the religious out-group, and demonstrate substantial out-group discrimination in behavioral games with real material stakes. The chapter highlights three interrelated consequences of exposure to large-scale episodes of intercommunal violence, each of which complicates post-conflict reconciliation: (1) the erosion of intergroup trust, (2) the tendency that the violence increases local residential segregation along communal lines, and (3) lasting psychological effects. The chapter offers micro-level evidence on each of these consequences from the Nigerian context, and cautions against expectations that post-conflict communities should quickly bounce back from large-scale interreligious violence.

Fundamentación ontológica del mundo virtual a partir de la filosofía de Nicolaï Hartmann

En el siguiente artículo se presenta una investigación filosófica acerca de la conformación ontológica delmundo virtual. Esta es un aporte teórico al debate contemporáneo de la filosofía de la computación sobrela caracterización ontológica de la computación digital y sus productos emergentes, ya que se propone unaaproximación a este campo de estudio desde la perspectiva filosófica de Nicolaï Hartmann. El objetivo principal del presente artículo es explicar la estratificación del mundo virtual a partir de la teoría ontológica de estratos y categorías de Hartmann. Para cumplir con este objetivo se procedió a una revisión crítica del estado de la cuestión de la ontología filosófica de la virtualidad. Luego se procedió a presentar una propuesta de estratificación y categorización denominada ‘La fábrica del mundo virtual’ que es una ontología hermenéutica de la virtualidad digital basada en los postulados de Hartmann. Las principales conclusiones alcanzadas son: i) La emergencia de la realidad del mundo virtual se encuentra constituida de los mismos estratos que conforman la esfera del conocimiento del mundo real: material, orgánico, psíquico y social. ii) La realidad virtual es un producto de la computación que ocurre en la esfera del conocimiento en el que existe intervención de la esfera ideal y de la esfera del mundo real.

A constitutive model for materials with directionally strain locking microstructures

Strain locking materials have a limit to the extent to which they can be stretched along one or more axes. The strain limit can be due to the reorientation of stiffening phases at microstructural or molecular scales along the direction of the applied load. Both natural and manmade composites can exhibit such a response when initially wavy fibers or other corrugated structures gradually straighten and limit the extensibility of the material. A new constitutive model is developed for materials that exhibit strain locking along a preferred axis. The model assumes the microstructure is composed of linear elastic material with embedded zig-zag shaped fiber phase that is oriented along the preferred locking axis. The response is governed by a complementary energy density function which is partitioned into separate portions that represent the complementary energies within the fibers and the matrix respectively. A new, nonlinear form for the complementary energy density function of strain locking fibers is derived based on a relationship between the applied stress and the strain of the fiber. An example material that exhibits strain locking longitudinally but is transversely linear-elastic is considered. The behaviors of the example material under tension and compression along the longitudinal and transverse axis are illustrated. A comparison is made with FEM modeling of a strain locking microstructure explicitly fitting the constitutive model parameters with both FEM simulated and experimental data for real material.

Digital Twins with Distributed Particle Simulation for Mine-to-Mill Material Tracking

Systems for transport and processing of granular media are challenging to analyse, operate and optimise. In the mining and mineral processing industries, these systems are chains of processes with a complex interplay among the equipment, control and processed material. The material properties have natural variations that are usually only known at certain locations. Therefore, we explored a material-oriented approach to digital twins with a particle representation of the granular media. In digital form, the material is treated as pseudo-particles, each representing a large collection of real particles of various sizes, shapes and mineral properties. Movements and changes in the state of the material are determined by the combined data from control systems, sensors, vehicle telematics and simulation models at locations where no real sensors could see. The particle-based representation enables material tracking along the chain of processes. Each digital particle can act as a carrier of observational data generated by the equipment as it interacts with the real material. This make it possible to better learn the material properties from process observations and to predict the effect on downstream processes. We tested the technique on a mining simulator and demonstrated the analysis that can be performed using data from cross-system material tracking.