The paper considers the mixture of randomness and fuzziness in a binary tree classifier. This model of classification is based on fuzzy observations, the randomness of classes and the Bayes rule. In this work, we present a new upper bound on the probability of error in a binary tree classifier. The obtained error for fuzzy observations is compared with the case when observations are not fuzzy, as a difference of errors. Additionally, the obtained results are compared with the bound on the probability of error based on information energy of fuzzy events. For interior nodes of decision tree, the new bound is twice as precise as the bound based on information energy.
The present definition of U.T.1 is a complex one which introduces the old concept of the ”Fictitious Mean Sun” which has been
suggested by Newcomb (1895). The conventional right ascension of the Fictitious Mean Sun brings the basic relationship between Sidereal Time, arising directly from observations, and U.T.1, as it is internationally adopted. Unfortunately, this basic relationship needs some effort of understanding for the common user. It is the reason
why B. Guinot (1979) proposed to adopt another point instead of the vernal equinox on the celestial equator, that he called the
‘non-rotating origin σ’. This point obeys to a clear kinematical
concept. Moreover, it should bring a new conceptual definition of U.T.1 very easy to understand. The position of σ on the celestial sphere can be easily determined by the Eulerian angles ψ and θ which are positionning the instantaneous axis of rotation of the Earth relatively to an inertial plane of reference. It can also be realized by the way of a quantity 's’ depending on the only motion
of the instantaneous equator. Formulation and developpement of ‘s’ are successively given.
The aim of the present study was to investigate the distribution and density of noradrenergic nerve fibres (NNFs), content of catecholamines (CATs) and steroids in the cystic ovaries of gilts receiving DXM from middle luteal phase. Cystic status of ovaries was induced by i.m. DXM injections on days 7-21 of the estrous cycle. During the same time, gilts in the control group received saline. The ovaries were collected on predicted day 11 of the second studied estrous cycle. The cystic ovaries were supplied by more numerous NNFs than the control gonads. Moreover after DXM injections, the content of CATs and progesterone and androstendione (A4) in the cystic wall were elevated, while the levels of A4, testosterone and estradiol-17β in the cystic fluid were lowered. Our results show that in the porcine cystic ovaries, induced by DXM injections from middle phase of estrous cycle, increased the density of NNFs and level of CATs, and that it was accompanied by changes in the content of steroids. Moreover, this study is a further confirmation that the morphological and functional changes of cystic ovaries are partly dependent on phase of the estrous cycle in which the induction of the ovarian cysts was initiated., A. Kozłowska, ... [et al.]., and Obsahuje seznam literatury
Studie otevírá diskusi s názory o původu a vývojových proměnách keramiky vytáčené kompletně na hrnčířském kruhu a opatřené pásovou výzdobou. Tato keramická třída byla používána v raném středověku (po dobu asi jednoho století) komunitami žijícími na jihu Velkopolska a v severovýchodní části Dolního Slezska. Dosavadní představy naznačující úzký vztah s obdobně zdobenou keramikou produkovanou v severních částech Čech jsou přehodnoceny s poukazem na vnitřní rozmanitost celé keramické třídy. Inspirační zdroje nepřicházely pouze z jihu (tj. z Čech), ale také ze severu (Pomořansko) a ze západu (oblast středního toku Labe). V rámci tohoto druhu keramiky lze pozorovat proměny, které se v produkci malých lokálních komunit objevují nezávisle na vnějších impulsech. and The article underlines the need to re-discuss the prevailing views in archaeological literature on the provenance and transformation stages of completely wheel-turned ceramics decorated with zoned ornament. This class of ceramics was used in the Early Middle Ages (for about 100 years) by communities living in the area of southern Greater Poland and the north-eastern part of Lower Silesia. The previous ideas suggesting a close relationship between zoned ceramics and vessels produced in northern Bohemia are reconsidered, with the internal diversity of zoned ceramics being pointed out. We argue that inspiration in ceramics manufacturing came not only from the south (Bohemia), but also from the north (Pomerania) and the west (the middle Elbe region), and that there were also changes that appeared independently of these impulses in the ceramics production of small, native communities.
Simultaneous photographic observations in Hα, and photoelectric observations in Hel γ 10830 line are analyzed for two flares of importance sf and 1B. For the estimation of physical conditions in the chromosphere of flares the non-LTE calculations of the Hα and γ 10830 line profiles were made for a number of model atmospheres. Comparing the observed values of Hα and γ 10830 line intensities vvith calculated ones, we derived the temperature
changes during the development of active formations for two levels of chromosphere (Ihe levels of Hα and γ 10830 line formation).
Specific associations between species frequently occur in ecological interactions. The aim of this study was to determine the preferences of anthomyiid flies of the genus Botanophila for particular species of fungi as sites for laying eggs and as food for both larvae and adults. The associations of their eggs, larvae and flies with the stromata of different species of Epichloë fungi infecting 7 species of grass in Poland were analyzed. Scanning electron microscopy of the surface of their eggs and an analysis of the genetic sequences of their mitochondrial cytochrome oxidase (COII) were used to identify the taxa of the flies studied. Three types of eggs were distinguished based on their shape, colour and the presence of dorsal folds and sculpturing on the shells. Tentatively, these eggs were assigned to the following species: B. laterella, B. phrenione, B. dissecta and B. lobata. COII sequences obtained from larvae that hatched from two of the types of eggs formed three distinct clades associated with the reference sequences for Botanophila phrenione, B. lobata (new to the fauna of Poland) and a putative species, “Taxon 1”. Only one of these flies (B. lobata) was restricted to a single species of Epichloë (E. bromicola on Elymus repens); B. phrenione was recorded mainly from E. typhina infecting three different species of grass. The results of this study confirm that there is not a close species specific association between this fungus and this insect., Marlena Lembicz ... [et al.]., and Obsahuje seznam literatury
A short-winged morph, whose occurrence is controlled by a simple recessive Mendelian unit, was recently discovered in Locusta migratoria. The existence of trade-offs between flight capability associated with wing length and other fitness-related traits are often documented for insects. The present study investigated the evolutionary significance of the short-winged and long-winged morphs of this locust using two laboratory strains showing wing dimorphism. The life-history traits examined included nymphal development, adult body weight, percentage adult survival, age at first reproduction, egg production and hatchling body weight. The results indicate that there are no consistent morph-specific differences in any of these traits. Of the several possibilities considered, the most likely is that the short-winged morph of this locust is an aberration or represents an initial stage in the evolution of this species., Yudai Nishide, Seiji Tanaka., and Obsahuje seznam literatury