DIAGaRa: An Incremental Algorithm for Inferring Implicative Rules from Examples

An approach is proposed for inferring implicative logical rules from examples. The concept of a good diagnostic test for a given set of positive examples lies in the basis of this approach. The process of inferring good diagnostic tests is considered as a process of inductive common sense reasoning. The incremental approach to learning algorithms is implemented in an algorithm DIAGaRa for inferring implicative rules from examples

An Approach to Incremental Learning Good Classification Tests

An algorithm of incremental mining implicative logical rules is pro-posed. This algorithm is based on constructing good classification tests. The in-cremental approach to constructing these rules allows revealing the interde-pendence between two fundamental components of human thinking: pattern recognition and knowledge acquisition

Computation of some Differential Operators in Toric Coordinates

Toric coordinates and toric vector field have been introduced in [2]. Let A be an arbitrary vector field. We obtain formulae for the divA, rotA and the Laplace operator in toric coordinates

J. Piaget's theory of intelligence: operational aspect

The Piaget's theory of intelligence is considered from the point of view of genesis and gradual development of human thinking operations. Attention is given to operational aspects of cognitive structures and knowledge. The significance of the Piaget's theory of intelligence is revealed for modeling conceptual reasoning in the framework of artificial intelligence

MONITORING OF POTATO CYST NEMATODES (GLOBODERA SPP.) IN SOUTHWEST BULGARIA

The potato cyst nematodes, Globodera pallida and Globodera rostochiensis, can cause significant economic damage to potato production and their conduct is a difficult process. They are quarantine pests for Europe, which are regulated by different directives specific to different regions. The main objective of the study was to provide data of the determination of the spread of potato cyst nematodes in Southwest Bulgaria in order to limit their further dissemination outside the infected areas. In the period 2015-2016, the monitoring of potato cyst nematodes was carried out in six major potato-producing regions in Bulgaria (Samokov, Pernik, Kyustendil, Pazardzhik, Blagoevgrad and Smolyan). The monitoring has covered seed production areas and potato areas intended for human consumption and/or for processing. The results confirm the presence of both species in the observed potato-growing areas. The distribution and density of nematodes of the genus Globodera varies between regions. G. rostochiensis was the most common species in all areas. The species was found by itself in a higher level than in joint populations of G. pallida

Infant nutrition and allergy

The correct nutrition in the first year of a child’s life is an important factor determining the physical and intellectual capabilities of a person at a later age and has an important meaning to the risk of developing a food allergy. The aim of our study was to determine whether breastfeeding practices, including exceptional breastfeeding, and using hydrolysed milk alter the risk of developing a food allergy in infants. Material and Methods: We tracked 180 healthy infants up to the age of one year old and 94 – with manifestations of allergy. The statistical processing and visualisation of the results were done with the products Statgraphics Plus and Microsoft Excel. Results: The success of breastfeeding in the monitored mothers in terms of duration of breastfeeding was influenced by the level of education, ethnicity and current place of residence. In normal birth and caesarean delivery, healthy children are breastfed over 7 months of age, while children with manifestations of allergy – up to 1-2 months of age. Among the monitored by us children food allergy was seen more frequently in infants with low birth weight.  More commonly during the first year we observed skin-gastrointestinal form toward cow’s milk proteins. Among the observed children with allergic manifestation we found elevated levels of immunoglobin E(36,5IU/ml), eosinophiles – over 7%, anaemic syndrome – 40,5%. About 93% of children with initial manifestations of allergy were fed milk for infants, 4,3% were on mixed feeding (breast milk and supplementation with infant milk), 2,1 - on exceptional breastfeeding. Conclusion: The frequent clinical manifestation of allergic colitis and confirmation of allergy to cow's milk with immunoglobulin E and eosinophils require the introduction of an elimination diet and prolonged feeding with protein hydrolysate 6-12 months

Screening the Antimicrobial activity of Actinomycetes strains isolated from Antarctica

A total of 40 actinomycete strains, isolated from Antarctica, were tested for antagonistic activity against 7 Gram-positive and Gram negative bacteria and yeasts, 16 phytopathogenic fungi and bacteria. During the initial screening 60 % of the strains showed inhibition potential against test-microorganisms. Ten of them had a broader spectrum of antibacterial activity and could be used in the development of new substances for pharmaceutical or agricultural purposes

Research of Dependence of Appearance of Abnormally Bright Mesospheric Clouds Structures on Large-Scale Space Phenomena

The phenomenon of noctilucent clouds (NC), i. e. clouds that form at an altitude of 70—95 km in the mesosphere, is still not fully understood. To date, there are several hypotheses explaining the formation of these clouds. The goal of this work was to test some hypotheses of the formation of noctilucent cloud, namely, volcanic eruptions and maxima of meteor showers. I analyzed Eyyafyadlayokyudl (Iceland) volcano and the volcanoes of Kamchatka. The meteor showers Quadrantids, Lyrids, Arietids and their activity maxima were also considered. The correspondence between the maxima of meteor showers and local enhancements in the number and brightness of noctilucent clouds is revealed.Феномен серебристых облаков (СО), облаков, образующихся на высотах 70—95 км в мезосфере, до сих пор остается не до конца изученным. На сегодняшний день существует несколько гипотез их образования. Цель данной работы — проверка некоторых гипотез образования серебристых облаков (извержение вулканов, максимум метеорных потоков). Из вулканов были проанализированы Эйяфьядлайёкюдль (Исландия) и вулканы Камчатки. Также были рассмотрены метеорные потоки Квадрантиды, Лириды, Ариетиды и их максимумы активности. Выявлено соответствие максимума метеорных потоков появлению локальных увеличений количества и яркости этих образований

Advanced Laboratory Methods for Detecting Yellow Fever Pathogen

Yellow fever is an acute infectious disease of viral nature, the causative agent of which is vector-borne –is transmitted through the bites of infected mosquitoes. Massive epidemics caused by the yellow fever virus are observed in the countries of Africa, South and Central America annually. Imported cases are also registered in non-endemic territories. The review presents the currently available data on the distribution, structure and classification of the yellow fever virus, the identification of its genetic variants depending on the geographical distribution, as well as modern methods of detection and identification of the pathogen in samples taken from sick and dead people. It considers the possibility of using virological, immunoserological and molecular-genetic methods for the diagnosis of yellow fever in different periods from the onset of the disease and in retrospective studies. The lists of diagnostic drugs of domestic and foreign production for the detection of agent markers (antigen, RNA), as well as specific antibodies of IgM and IgG classes, approved for use on the territory of the Russian Federation, are provided. The relevance of further development, improvement and introduction into laboratory practice of reagent kits that allow to detect the yellow fever virus in samples from sick people in a short time, with high efficiency and specificity is demonstrated. This will help to establish a diagnosis promptly and conduct timely anti-epidemic measures, as well as to determine the level of the population stratum immune to the pathogen in endemic regions and evaluate the effectiveness of immunization for the vaccinated contingent