In this article, we propose the realization of XNOR logic function by using all-optical XOR and NOT logic gates. Initially, both XOR and NOT gates are designed, simulated and optimized for high contrast outputs. T-shaped waveguides are created on the photonic crystal platform to realize these logic gates. An extra input is used to perform the inversion operation in the NOT gate. Inputs in both the gates are applied with out of phase so as to have a destructive interference between them and produce negligible intensity for logic ‘0'. The XOR and NOT gates are simulated using Finite Difference Time Domain method which results with a high contrast ratio of 55.23 dB and 54.83 dB, respectively at a response time of 0.136 ps and 0.1256 ps. Later, both the gates are cascaded by superimposing the output branch of the waveguide of XOR gate with the input branch of the waveguide of NOT gate so that it can be resulted with compact size for XNOR logic function. The resultant structure of XNOR logic came out with the contrast ratio of 12.27 dB at a response time of 0.1588 ps. Finally, it can be concluded that the proposed structures with fair output performance can suitably be applied in the design of photonic integrated circuits for high speed computing and telecommunication systems.
Given the whole spectrum of doubts and controversies that arise in discussions about laws affecting historical memory (and their subcategory of memory laws), the question of assessing them in the context of international standards of human rights protection – and in particular the European system of human rights protection – is often overlooked. Thus this article focuses on the implications and conditions for introducing memory laws in light of international human rights standards using selected examples of various types of recently-adopted Polish memory laws as case studies. The authors begin with a brief description of the phenomenon of memory laws and the most significant threats that they pose to the protection of international human rights standards. The following sections analyse selected Polish laws affecting historical memory vis-à-vis these standards. The analysis covers non-binding declaratory laws affecting historical memory, and acts that include criminal law sanctions. The article attempts to sketch the circumstances linking laws affecting historical memory with the human rights protection standards, including those entailed both in binding treaties and other instruments of international law.
When conducting geodetic and gravimetric measurements, there is a problem of projecting them to the reference surface. Since the gravitational field is inhomogeneous under the real conditions, the problem arises of determining the corrections to the measured values of gravitational acceleration in order to use the obtained data for the subsequent solutions of projection problems. Currently, the solution to this problem is performed using a Bouguer reduction, which requires information about the internal structure of the upper layer of the earth’s surface, topography, etc. The purpose of this study is to develop a methodological approach that would allow to determine the reduction (projection) corrections for gravitational acceleration on technogenic and geodynamic polygons without using data about the distribution of surface layer density and topography. The research process is based on the use of mathematical analysis methods and a wide range of experimental geodetic and gravimetric measurements. In the course of the performed researches, an algorithm was obtained and a practical implementation of the determination of the corrections in the measured values of gravitational acceleration on the basis of geodetic and gravimetric measurements was carried out at the certain geodynamic polygon in order to bring all corrections to one level surface.
This paper presents a force-dynamics analysis of the meaning of English periphrastic causative verbs. It challenges the traditional categorization of causative semantics into direct and indirect causation and highlights the role of lexico-semantic elements such as (i) the balance of forces, (ii) the desirability of the causal effect, and (iii) the animacy of the causative entities in interaction. Combined together, these elements help define causative semantics and offer a new causative typology built on the categories of factitivity, manipulation and permission.
This article explores the experiences of lesbian, gay, bisexual and transgender (LGBT) migrants from Central and Eastern Europe and the Former Soviet Union in Scotland. Drawing on interviews with 50 migrants, the article focuses on the experiences and aspirations which they articulate as being part of ‘a normal life’, and analyses them within broader conceptual understandings of security and ‘normal-ity’. We first examine how normality is equated with an improved economic position in Scotland, and look at the ways in which this engenders feelings of emotional security and well-being. We then explore how more positive experiences around sexuality and gender identity are key to a sense of emotional security – i.e. of feeling accepted as ‘normal’, being visible as an LGBT person but ‘blending in’ rather than standing out because of it. Finally we look at the ways in which the institutional framework in Scotland, in particular the presence of LGBT-affirmative legislation, is seen by participants to have a normalising effect within society, leading to a broader sense of inclusion and equality – found, again, to directly impact upon participants’ own feelings of security and emotional well-being. The article engages with literatures on migration and sexuality and provides an original contribution to both: through its focus upon sexuality, which remains unexplored in debates on ‘normality’ and migration in the UK; and by bringing a migration perspective to the debates in sexuality studies around the normal-ising effect of the law across Europe. By bringing these two perspectives together, we reveal the inter-rela-tionship between sexuality and other key spheres of our participants’ lives in order to better understand their experiences of migration and settlement.
The paper aims was assessing risks of mandible fractures consequent to impacts or sport accidents. The role of the structural stiffness of mandible, related to disocclusion state, was evaluated using the finite element method. It has been assumed, that the quasi-static stress field, due to distributed forces developed during accidents, could explain the common types of mandibular fractures. Mandibular condyles were supposed jammed in the maxillary fossae. The force of 700 N, simulating an impact on mandible, has been sequentially applied in three distinct areas: centrally, at canine zone and at the mandibular angle. Clinically most frequent fractures of mandible were recognized through the analysis of maximal principal stress/strain fields. It has been shown that mandibular fracture during accidents can be analyzed at satisfactory level using linear quasi-static models for designing protections.
The paper presents the results of preliminary research on the application of olivine moulding sands with hydrated sodium silicate containing 1.5 % wt. of binder to perform ecological casting cores in hot-box technology using a semi-automatic core shooter. The following parameters were used in the process of core shooting: initial shot pressure of 6 bar, shot time 3 s, the temperature of the corebox: 200, 250 and 300 °C and the core curing time: 30, 60, 90, 120 and 150 s. The matrix of the moulding mixture was olivine sand, and the binder of the sandmix was commercial, unmodified hydrated sodium silicate with molar module SiO2/Na2O of 2.5. In one shot of the automatic core-shooter were formed three longitudinal specimens (cores) with a dimensions 22.2×22.2×180 mm. The samples obtained in this way were subjected to the assessment of the influence of the shooting parameters, i.e. shooting time, temperature and curing time in core-box, using the following criteria: core box fill rate, mechanical strength to bending Rg U, apparent density, compaction degree and susceptibility to friability of sand grains after hardening. The results of trials on the use of olivine moulding sands with hydrated sodium silicate (olivine SSBS) in the process of core shooting made it possible to determine the conditions for further research on the improvement of inorganic hot-box process technology aimed at: reduction of the heating temperature and the curing time. It was found that correlation between the parameters of the shooting process and the bending strength of olivine moulding sands with sodium silicate is observed.
The article is focused on the synergic effect of constant content of Zr and higher content of Ti on mechanical properties Al-Si alloy. The Ti additions were in proportions of 0.1, 0.2 and 0.3 wt.% Ti. The casting process was carried out in ceramic molds, created for the investment casting technology. Half of the experimental samples were processed by precipitation curing T6. The measured results were compared with primary alloy AlSi7Mg0,3 and experimental alloy AlSi7Mg0.3Cu0.5Zr0.15. In variant with addition 0.1 wt. %, the tensile strength Rm increased by 1,5% but the elongation AM decreased to 40%. Variants with 0.2 and 0.3 wt. % addition of Ti achieved similar Rm but approximately 40% decrease in AM. However, it is interesting that yield strength Rp0.2 increased for all variants by approximately 14 to 20%. The results point out the possibility of developing a more sophisticated alloy for automotive industry.
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