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The ability to discriminate parasitized and non-parasitized hosts allows the parasitoids to avoid the intraspe-cies and often interspecies competition. In 2005-2009, an analysis of the occurrence of mixed infestation of Polistes nimpha (Christ) colonies by parasitoids Elasmus schmitti Ruschka (Hymenoptera, Eulophidae) and Latibulus argiolus (Rossi) (Hymenoptera, Ichneumonidae) was performed. In settlements of different types, a deviation in the values of the mixed infestation from the expected ones under random value distribution was observed The data obtained do not allow coming to an explicit conclusion as to parasitoids having or lacking the discriminating ability. The data obtained are discussed in relation to the biological features of parasitoids.


Lvov M.S.,Kherson State University
Cybernetics and Systems Analysis | Year: 2010

The problem of generating polynomial invariants of special type for iterative loops with a linear mapping in the loop body is considered. A technique is proposed to generate such invariants based on the analysis of characteristic polynomials of linear mappings. © 2010 Springer Science+Business Media, Inc.


Weissblut A.,Kherson State University
CEUR Workshop Proceedings | Year: 2015

The paper describes the site "Lesson pulse". It is the tool allowing a teacher to obtain the objective information on the results of a lesson in real-time mode. However, adequate interpretation for the results of such interrogations is impossible while we do not separate true students from the others. Besides, interpretation of the results of interrogations and decision-making grounded on them demand to realize what exactly this specific group means by clearness of explanation, objectivity of marks, etc. For anonymous interrogations it means the necessity of the correlation and regression analysis of the results and an estimation of their statistical significance. So these factors require the use of econometric analysis.


Kravtsov H.,Kherson State University
CEUR Workshop Proceedings | Year: 2015

Support of the quality of training is one of the main objectives of the university system. The results of modeling the quality management system of electronic educational resources (EER) on the basis of the analysis of its elements are presented. The subject of the study is the EER quality monitoring. Technolo-gies for EER quality monitoring are based on the method of expert evaluations. The criterion of EER quality is considered as the weighted average value of qual-ity indicators. The weights of EER types and indicators of EER quality for their types are evaluated in pedagogical experiment. Results of experiment confirmed the assumption that the method of expert evaluations can be the basis for the EER quality monitoring. Concordance method is used to assess the degree of consen-sus of experts on the factors: weights of EER types, parameterization of EER quality indicators, and weighted average criterion of EER quality. The model of quality management system is shown in the example of assessing the quality of the distance learning system resources.


Shkuropat A.,Kherson State University
Neurophysiology | Year: 2016

We recorded EEG activity in 82 12- to 15-year-old adolescents suffering from sensorineural hearing loss (II or III degree) and 80 secondary-school similar-age pupils with normal hearing. Four pairs of recording electrodes (frontal, temporal, parietal, and occipital) were used. The recording was performed under resting conditions and during the performance of the Raven test, which provided the action of cognitive loading. In hard-of-hearing boys and girls in the resting state, the number of lead pairs with significant or high coherence of oscillations of the EEG rhythms (coherence coefficients, CC, 0.51 to 0.70 and 0.71 to 1.00, respectively) usually exceeded the respective figures in normally hearing adolescents. In boys of both groups performing the cognitive test, the number of lead pairs with the CCs exceeding 0.50 increased in most cases. This was especially significantly manifested with respect to theta activity in hard-of-hearing boys; a focus of intense coherence of theta oscillations was formed in subjects of this group in the right temporal area. In girls of both groups, cognitive loading usually did not induce considerable increases in the coherence of EEG rhythms; the number of lead pairs with CC values > > 0.50 either remained unchanged or even decreased. Thus, hard-of-hearing adolescents (especially boys subjected to cognitive loading) demonstrated an intense trend toward increase in coherence relations between remote cortical loci (generalization of coherence), i.e., toward the formation of more extensive associative networks. Changes in the spatial organization of coherent relationships under the action of cognitive loading demonstrate certain gender specificity. © 2016 Springer Science+Business Media New York


Lvov M.S.,Kherson State University
Cybernetics and Systems Analysis | Year: 2016

The paper presents a new method to prove the invariance of the system of linear inequalities and completability of linear definite iterative loops for imperative programs. Loop body is a linear operator that transforms the vector of program variables. The method takes into account loop precondition, as well as the condition of loop repetition in the form of a set of systems of linear inequalities. The method is based on the construction and analysis of the spectrum of linear operator and calculation of the number of loop iterations after which the invariance is either provided or disproved. The theory is illustrated by examples. © 2016, Springer Science+Business Media New York.


Lvov M.S.,Kherson State University
Cybernetics and Systems Analysis | Year: 2015

. This article considers the problem of generating polynomial invariants for iterative loops with loop initialization statements and nonsingular linear operators in loop bodies. The set of such invariants forms an ideal in the ring of polynomials in the loop variables. Two algorithms are presented one of which calculates basic invariants for a linear operator in the form of a Jordan cell and the other calculates basic invariants for a diagonalizable linear operator with an irreducible minimal characteristic polynomial. The following theorem on the structure of the basis of the ideal of invariants for such an operator is proved: this basis consists of basic invariants of Jordan cells and basic invariants of the diagonalizable part of the linear operator being considered. © 2015 Springer Science+Business Media New York


Kushnir N.,Kherson State University | Manzhula A.,Kherson State University
Communications in Computer and Information Science | Year: 2013

The chapter presents the experience of forming the ICT-competencies of future teachers of elementary school and early education. The course is developed on the Moodle platform for distance education. The course objective is training of future teachers to use ICT in their pedagogical activities, understanding the role of ICT, its opportunities and perspectives for improving educational process. © 2013 Springer-Verlag Berlin Heidelberg.


Lvov M.S.,Kherson State University
Cybernetics and Systems Analysis | Year: 2010

An algebraic approach is proposed to the construction of an algorithm for the solution of a system of linear inequalities. The essence of this approach is that a special algebra A constr in which a system of linear inequalities (SLI) is represented in the form of an expression is constructively defined in terms of multisorted algebraic systems. Such an SLI is solved by computing the value of this expression as an element of the algebra A constr (the canonical form of representation). The result of applying this approach to the problem being considered consists of algebraic specifications of the algebra A constr. © 2010 Springer Science+Business Media, Inc.


Lvov M.S.,Kherson State University
Cybernetics and Systems Analysis | Year: 2014

This article presents a new method for proving the invariance of simultaneous linear inequalities for iteration loops defined over the field of rational numbers with a linear operator in the loop body. The method takes into account a loop precondition in the form of a system of linear inequalities. The consideration is restricted to the case when all eigenvalues of the linear operator are real. The method is based on computing the number of loop iterations whose execution either ensures or disproves the invariance of the system of linear inequalities. The method uses the Jordan form of representation of linear operators. © 2014 Springer Science+Business Media New York.

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