Determine of geometrical characteristics ranges of the discretely presented curve with law of curvature change

The conditions modeling of curve with a monotonous change of curvature and the scheme of the destination of the provisions tangents at which the problem of modeling the contours with a monotonous change of curvature has a solution is considered in this article

Engineering of Low-Loss Metal for Nanoplasmonic and Metamaterials Applications

We have shown that alloying a noble metal (gold) with another metal (cadmium), which can contribute two electrons per atom to a free electron gas, can significantly improve the metals optical properties in certain wavelength ranges and make them worse in the other parts of the spectrum. In particular, in the gold-cadmium alloy we have demonstrated a significant expansion of the spectral range of metallic reflectance to shorter wavelengths. The experimental results and the predictions of the first principles theory demonstrate an opportunity for the improvement and optimization of low-loss metals for nanoplasmonic and metamaterials applications.Comment: 14 Pages, 4 figure

Variative modelling of one-dimensional contours according to the given conditions

Model of the surface of complex shape is usually formed on the basis of the frame, elements of which are plane and spatial curves. The task of ensuring the functional properties of these surfaces requires the development of methods for the formation of linear elements of the model as a one dimensional contours with the desirable law of geometric characteristics change. The order of fixation and order of smoothness of contour, curvature and torsion values which change along the curve are those characteristics for spatial curves

Administrative Offense Proceedings and Pre-Trial Dispute Resolution in the BRICS Countries

This article offers a comparative analysis of the particularities of the implementation of proceedings in cases of administrative offenses and pre-trial dispute resolution in the BRICS member states. The article observes that in the BRICS countries, the issues of pre-trial dispute settlement are resolved using the same mechanisms: negotiation and conciliation procedures, including mediation. The implementation of these mechanisms is possible by the parties to the dispute themselves, with the participation of third parties such as proxies or legal representatives who may be interested in carrying out the procedures, and with the services of independent, professional mediators. The article draws attention to the fact that the Federative Republic of Brazil, the Russian Federation, the Republic of India, the People’s Republic of China and the Republic of South Africa belong to different legal families, which undoubtedly is a feature of the legal regulation of their administrative offense proceedings as well as of their pre-trial dispute resolution. The article finds that Roman law largely influenced all of the BRICS countries, with the exception of India, whose legal system was formed under the influence of English law, and that the versatility of legal regulation does not allow one to speak fully about the balance of administrative legislation in the studied areas. Furthermore, it is characteristic of all of the BRICS countries that administrative punishment cannot be aimed at humiliating the human dignity of a natural person, causing him or her physical suffering, nor can it be aimed at damaging the business reputation of a legal person. The similarity of the tasks of the administrative legislation of the BRICS countries is noted, which should include the protection of the subjective rights and interests of citizens, ensuring the rule of law, the protection of public order and public safety, and the prevention of administrative offenses. Through the discourse presented by the authors, the concept of an administrative offense is revealed; the acts regulating the proceedings in cases of administrative offenses are considered, as well as the tasks and principles established by national legislation in this direction. Furthermore, the similarities and differences in the legal regulation of proceedings in cases of administrative offenses and pre-trial settlement of disputes are revealed

Solid-phase spectrophotometric iodometric determination of nitrite and selenium(IV) using a polymethacrylate matrix

Procedures for the iodometric solid-phase spectrophotometric determination of nitrite and selenium( IV) using a polymethacrylate matrix are proposed. The procedures are based on the reaction of nitrite and selenium(IV) with iodine in an acidic medium with the release of free iodine in amounts equivalent to those of the substances to be determined, extraction of the iodine formed with a polymethacrylate matrix, and measurement of absorbance of the matrix at 370 nm. The developed procedures ensure the determination of 0.01–0.12 mg/L of nitrite and 0.05–0.40 mg/L of selenium(IV) with limits of detection of 0.005 and 0.03 mg/L, respectively. It was shown that the proposed procedures can be applied to the determination of selenium(IV) in mineral water and nitrites in vegetables and soil

Effect of polyethylene glycol immobilized into a polymethacrylate matrix on the sorption of rhodamine

Combined matrix PMMA and PEG, having a polymethacrylate backbone and hydrophilic PEG chains, has been synthesized and applied for the design of transparent colour sensors. Introduction of the hydrophilic PEG chains in the PMMA bulk overcomes the limitations caused by the hydrophobicity of PMMA, and exhibits good wettability, stable and specific adsorption. We suppose that the adsorption of rhodamine on such networks depends on the chemical composition of the system and describes the interaction of the xanthene dye with the polymers