Comparison of levels and fusion approaches for multimodal biometrics

The biometric-based authentication system occupies maximal space in the field of security administration. Biometric applications are swiftly accelerating in day-to-day life such as computer login, smart homes, online banking, hospitals, border areas, industries, forensics, e-voting attendance system and investigation of crime. A reliable and accurate recognition body can be achieved with multimodal biometric methodologies. In this paper, we discuss starting with an introduction to biometric systems followed by their classification, and advantages as well as disadvantages. In today’s world, most of the systems are unimodal biometrics having a lot of limitations to overcome those multimodal biometrics comes in to picture. In this paper we have discussed comprehensive representation on the system of multimodal biometric, various modes of undertakings, the significance of information fusion, a different section is allotted on the various possible levels of fusion involving sensor-level, feature-level, score-level, and decision -level as well as different rules of fusion.

Data-Driven Model Reduction for Stochastic Burgers Equations

We present a class of efficient parametric closure models for 1D stochastic Burgers equations. Casting it as statistical learning of the flow map, we derive the parametric form by representing the unresolved high wavenumber Fourier modes as functionals of the resolved variable’s trajectory. The reduced models are nonlinear autoregression (NAR) time series models, with coefficients estimated from data by least squares. The NAR models can accurately reproduce the energy spectrum, the invariant densities, and the autocorrelations. Taking advantage of the simplicity of the NAR models, we investigate maximal space-time reduction. Reduction in space dimension is unlimited, and NAR models with two Fourier modes can perform well. The NAR model’s stability limits time reduction, with a maximal time step smaller than that of the K-mode Galerkin system. We report a potential criterion for optimal space-time reduction: the NAR models achieve minimal relative error in the energy spectrum at the time step, where the K-mode Galerkin system’s mean Courant–Friedrichs–Lewy (CFL) number agrees with that of the full model.

Teachers’ Work with Taxonomy of Educational Objectives as One of the Forms of the Gifted Preschoolers’ Development

Introduction: The article presents the results of a research project the aim of which was to describe the level of kindergarten teachers’ work with educational objectives in connection with the application of a differentiated curriculum for the development of gifted children. Methods: The research tool was a questionnaire in which the teachers selected one of three answers possible and matched their pedagogical activities in kindergarten the most. 345 teachers from kindergartens in the Czech Republic took part in the research. Data was processed using computer software SPSS. Results: It was discovered that most of them can differentiate their instructions, however, at least a half of them do not respect the rules of inclusive education and their instructions result in an unwanted labelling of the gifted children. We have also proved that the level of the teachers’ work with the educational objectives is positively influenced by their longer than 10 years’ experience, work with heterogeneous class age-wise, and their having attended a seminar focused on the topic of giftedness. Discussion: The discussion focuses on the description of variables affecting the level of work with educational objectives in connection with the application of a differentiated curriculum for the development of gifted children. Limitations: The limitation is the simplification of the pedagogical reality into 3 possible answers and the artificial metrization of this data. Another problem was that our questionnaire was focused only on selected aspects of pedagogical work with gifted preschoolers, which were related to the curriculum modification and inclusive education. Furthermore, despite the big amount of validly filled in questionnaires (345) the research cannot be considered to be large area survey and the results cannot be generalized. Conclusions: Gifted children should have the maximal space for the development of their own potential. It is also necessary to increase the teachers’ skills to apply the differentiated curriculum with the features of inclusive education in order to develop the giftedness of all the children as much as possible. One of the possibilities is the kindergarten teachers’ attendance to educational events on the topic of giftedness, which is one of the variables which significantly influence the quality of their work.

The Synergistic Effect of Acidic Properties and Channel Systems of Zeolites on the Synthesis of Polyoxymethylene Dimethyl Ethers from Dimethoxymethane and Trioxymethylene

A series of zeolites with different topology structures, including SAPO-34, SUZ-4, ZSM-5, USY, MOR, and beta, were used to synthesize polyoxymethylene dimethyl ethers (PODEn) from dimethoxymethane (DMM) and trioxymethylene (TOM). The influence of acidic properties and channel systems were studied by activity evaluation, characterization, and theoretical calculation. The results confirmed that pore mouth diameter larger than a TOM molecule was an essential prerequisite for the synthesis of PODEn over zeolites, and the synergistic effect between medium-strong Brønsted acid sites (Brønsted MAS) and the maximal space of zeolites available determined the catalytic performance of all studied zeolites. DMM and TOM were firstly decomposed into methoxymethoxy groups (MMZ) and monomer CH2O over Brønsted MAS. Subsequently, the steric constraint of the maximum included sphere, with an appropriate size in zeolite channels, can promote the combination of CH2O and MMZ to form transition species ZO(CH2O)nCH3, which reacted with the methyl-end group to form PODEn over Brønsted MAS. Moreover, the reaction temperature showed different effects on the product selectivity and distribution, which also mainly depends on the size of the maximum space available in zeolite channels.

A conserved energy for axially symmetric Newman–Penrose–Maxwell scalars on Kerr black holes

We show that there exists a 1-parameter family of positive-definite and conserved energy functionals for axially symmetric Newman–Penrose–Maxwell scalars on the maximal space-like hypersurfaces in the exterior of Kerr black holes. It is also shown that the Poisson bracket within this 1-parameter family of energies vanishes on the maximal hypersurfaces.

Weak-Type Boundedness of the Fourier Transform on Rearrangement Invariant Function Spaces

We study several questions about the weak-type boundedness of the Fourier transform ℱ on rearrangement invariant spaces. In particular, we characterize the action of ℱ as a bounded operator from the minimal Lorentz space Λ(X) into the Marcinkiewicz maximal space M(X), both associated with a rearrangement invariant space X. Finally, we also prove some results establishing that the weak-type boundedness of ℱ, in certain weighted Lorentz spaces, is equivalent to the corresponding strong-type estimates.

Urban housing experiments in Yugoslavia 1948-1970

In the period from 1948 to 1970 urban housing architecture in Yugoslavia had a distinctly experimental character as it strived intensively towards research and establishment of new architectural patterns and values that would mark the period of economic growth of the country. In conditions of mass housing construction, initiated by the devastated urban housing fund after the Second World War, significant influx of population to towns and the state directed its socialist aspirations at alloting every family acceptable living space. The period of the so-called ?directed housing construction?, whose imperative was to establish the limits of existential minimum in collective housing, maximal space ?packing? and optimal functionality of flats, at the same time represents the most significant period in the development of housing architecture in Yugoslavia. The architects focused their interests in housing in mainly three directions: a) the creation and application of new prefabrication systems, b) innovative application of modernistic patterns in aestheticization of architecture and c) experimenting with space units which will enable a higher level of privacy in high-density housing conditions. The first direction of research emerged in the context of post-war housing construction of a wide scope, which encouraged the advance of technological research in areas of prefabrication and practical application of achieved results on the whole territory of Yugoslavia. The second direction dealt with architectural planning which was strictly subordinated to social and ideological sphere with domineering socialist monumentalism and artistic and sculptural approach to architecture. The third was related to experimental tendency with new urban housing patterns which aimed to search and find more pragmatic, humane solutions within mass high-density housing constructions which were the first to utilize and show examples of ?double-tract? buildings. These were primarily realized in Serbia, as continuation of tendencies first expressed in activities of ?Belgrade School of Housing?.