As part of a metazoan parasite survey of elasmobranchs from Malaysian Borneo, specimens of Rhoptrobothrium Shipley et Hornell, 1906 were collected from the eagle rays Aetomylaeus maculatus (Gray) and Aetomylaeus niehofii (Bloch et Schneider). The type species is redescribed from its type host, and a neotype specimen is designated. In addition, three new species of Rhoptrobothrium are described: R. chongi sp. n., R. gambangi sp. n. and R. limae sp. n. Rhoptrobothrium myliobatidis conspicuously differs from the three new species in its lack of a secondary areola; R. limae is distinguished from R. chongi and R. gambangi based on its greater total length; R. chongi possesses conspicuously stalked remi, while R. gambangi possesses short remi, often folded anteriorly. Rhoptrobothrium is somewhat unusual among tetraphyllideans in its possession of a ''metascolex,'' a character it shares with other taxa in the Thysanocephalinae (i.e., Myzocephalus Shipley et Hornell, 1906, Myzophyllobothrium Shipley et Hornell, 1906 and Thysanocephalum Linton, 1889). The morphology of the ''metascolex'' of Rhoptrobothrium is investigated and new terminology is suggested to standardise the names given to structures constituting a metascolex. As a result, Rhoptrobothrium is considered to possess cephalic peduncle extensions, termed remi. In Rhoptrobothrium, each remus bears, at its distal end, a primary areola, and, in the case of the three new species, also a secondary areola proximal to the primary areola. Myzocephalus and Myzophyllobothrium are tentatively considered to possess remi; the configuration of the ''metascolex'' of Thysanocephalum, however, is not considered homologous to the condition in the other three genera currently placed in the Thysanocephalinae.
The status and composition of the Diplosentidae Tubangui et Masiluñgan, 1937 are reviewed. The type species of the type genus, Diplosentis amphacanthi Tubangui et Masiluñgan, 1937 from Siganus canaliculatus (Park, 1797) in the Philippines, is concluded to have been described inaccurately in supposedly possessing only two cement glands and lemnisci enclosed in a membranous sac. The species is almost certainly very close to species of Neorhadinorhynchus Yamaguti, 1939 and Sclerocollum Schmidt et Paperna, 1978 which have also been reported from siganids from the tropical Indo-Pacific. Species of these genera have four cement glands and unexceptional lemnisci. As a result, Diplosentis Tubangui et Masiluñgan, 1937 is best considered to have affinities with the Cavisomidae Meyer, 1932. The Cavisomidae has priority over the Diplosentidae; thus the Diplosentidae becomes a synonym of the Cavisomidae. Neorhadinorhynchus and Sclerocollum are considered synonyms of Diplosentis. The affinities of the other species and genera formerly included in the Diplosentidae (other species of Diplosentis, Allorhadinorhynchus Yamaguti, 1959, Amapacanthus Salgado-Maldonado et Santos, 2000, Pararhadinorhynchus Johnston et Edmonds, 1947, Golvanorhynchus Noronha, de Fábio et Pinto, 1978 and Slendrorhynchus Amin et Sey, 1996) are discussed. It is concluded that all but Pararhadinorhynchus, two species of Diplosentis and Amapacanthus can be accommodated elsewhere satisfactorily. A new family, Transvenidae, is proposed for a small group of acanthocephalans that genuinely possess only two cement glands. Transvena annulospinosa gen. n., sp. n. is described from the labrids Anampses neoguinaicus Bleeker, 1878 (type host), A. geographicus Valenciennes, 1840, A. caeruleopunctatus Rüppell, 1829, Hemigymnus fasciatus (Bloch, 1792), and H. melapterus (Bloch, 1791) from the Great Barrier Reef, Queensland, Australia. Transvena gen. n. is distinguished from all other acanthocephalan genera by having a combination of a single ring of small spines on its trunk near or at the junction between the neck and trunk, two cement glands, a double-walled proboscis receptacle and hooks which decrease in length from the apex to the base of the proboscis. A second new genus within the Transvenidae, Trajectura, is proposed for T. perinsolens sp. n. from Anampses neoguinaicus, also from the Great Barrier Reef. Trajectura gen. n. is distinguished by the possession of only two cement glands and an anterior conical projection (function unknown) on the females. Diplosentis ikedai Machida, 1992 shares these characters and is recombined as Trajectura ikedai comb. n. Pararhadinorhynchus is transferred to the and Transvenidae and Diplosentis manteri Gupta et Fatma, 1979 is recombined as Pararhadinorhynchus manteri comb. n.
The mood and behavior of individuals result from an orchestra of many factors. Among them steroids play an important role; however, only several common hormones have been investigated in this respect. It has been demonstrated that some steroid metabolites long considered merely the products of steroid hormone metabolism in fact possess considerable activity in the CNS. For this reason we studied the steroid metabolome including 50 analytes in 20 men with depression, 20 men with anxiety and 30 healthy controls. Significant differences were found not only between controls and men with either depression or anxiety, but also between men with depression and anxiety. Particularly striking were those steroids until now not generally associated with depression or anxiety, namely conjugated steroid forms, especially sulfates., M. Dušková, M. hill, M. Bičíková, M. Šrámková, D. Řípová, P. Mohr, L. Stárka., and Obsahuje bibliografii
Addiction to tobacco results in an imbalance of endocrine homeostasis in both sexes. This can also have impacts on fertility problems. The male reproductive system is less susceptible than that of females, with a worsening spermiogram in smokers, the most cited effect in the literature. However, the literature is inconsistent as to the effects of smoking on steroid hormone levels in men, and there is very little data on the effects of quitting smoking in men. In this study we followed 76 men before quitting smoking, and then after 6, 12, and 24 weeks and 1 year of abstinence. We measured basic anthropomorphic data and steroid hormone levels along with steroid neuroactive metabolites using GC-MS. We demonstrate lower androgen levels in men who smoke, and these changes worsened after quitting smoking. There was a drop in SHBG already in the first week of non-smoking, and levels continued to remain low. Male smokers have lower androgen levels compared to non-smokers. The lower the initial level of androgen, the lower the likelihood of success in quitting smoking. Changes in steroid hormones proved to be a promising marker for the prediction of success in quitting smoking., H. Jandikova, M. Duskova, K. Simunkova, B. Racz, M. Hill, E. Kralikova, K. Vondra, L. Starka., and Obsahuje bibliografii
This article is concerned with the attitude that the Communist Party of Bohemia and Moravia (Komunistická strana Čech a Moravy - KSČM) has had towards its own past. It examines the subject from the perspective of the internal development of the Party and its search for a political and cultural identity in the Czech political system. The interpretation of the past and the role of the Communist Party of Czechoslovakia (Komunistická strana Československa - KSČ) in Czech and Czechoslovak history were key elements in the ideological development of the Party in the fi rst ten years of Czech democracy after the changes beginning in November 1989. And they played a central role in the Communists’ efforts to respond to the newdemocracy’s systemic and rhetorical anti-Communism. In this article the author seeks to demonstrate what effect debates about the past had in causing divisions in the Party in the fi rst years after 1989. On the one hand they contributed to cleavages within the Party, but on the other hand they also created conditions for its later consolidation and new self-confi dence. The initial reformist strategy inclined roughly to the ideas of the Social Democratic Party and sought to win the maximum number of votes and ultimately a share in government. It was supported by the fi lm-maker and chairman of the Party, Jiří Svoboda (b. 1945) from 1990 to 1993, but was gradually superseded by the strategy of what one Czech expert on international relations, Vladimír Handl, has called the ''left-wing retreat'', and what one British political scientist, Seán Hanley, calls ''voter representation'', based on the strengthening of political-cultural identity and the emphasizing of communication between the rank-and-fi le and the leadership of the Party. As the author demonstrates, the idea of ''coming to terms with the past'' gradually acquired a meaning amongst the Communists that was markedly different from the meaning it had for most Czechs. The pragmatism of the subsequent leader, Miroslav Grebeníček (b. 1947), to a certain extent attenuated, but did not solve, the fundamental dilemma faced by the Party, which consisted in the confl ict between the ''logic of the electoral struggle'' and the ''logic of voter representation''. The fi rst trend after the downfall of the reformists in 1993 included, in particular, neoCommunist theorists (like the political thinker Miloslav Ransdorf, b. 1953), who sought to formulate Socialist alternatives acceptable to most left-leaning Czechs. That also led them to attempt a more critical analysis of their own past than the majority of their rank-and-fi le members would have done. The second trend, the logic of voter representation, oriented to preserving and strengthening the strong identity of Party members and supporters, was linked with the continuing conservative majority of the rank-and-fi le represented by local activists, the Party press, and some members of the Party leadership. All of them preferred the programme of political and social populism. They tended to understand history as the ''politics of history'' - in other words, as a means to support their own identity and to resist the hostile environment outside the Party. For both trends in the Party, however, the challenge presented by anti-Communism - whether systemic or spontaneous - remained, to the end of the 1990s, an important, if not the most important, unifying motive. But it considerably limited their possibilities to raise sensitive questions about their own past and to hold a potentially critical debate.
he aim of this paper is to show how the Hodgkin-Huxley model of the neuron's membrane potential can be extended to a stochastic one. This extension can be done either by adding fluctuations to the equations of the model or by using Markov kinetic schemes' formalism. We are presenting a new extension of the model. This modification simplifies computational complexity of the neuron model especially when considering a hardware implementation. The hardware implemen- tation of the extended model as a system on a chip using a field-programmable gate array (FPGA) is demonstrated in this paper. The results confirm the reliability of the extended model presented here.
This article presents an analysis of Czechoslovak political history of the fi rst half of the 1970s and the question of who would succeed General Ludvík Svoboda (1895-1979) as Czechoslovak President. The emphasis is on the role of Gustáv Husák (1913-1991), who emerged from the political crisis of 1968-69 as the most powerful actor, and was, at the 14th Congress of the Czechoslovak Communist Party, confi rmed as General Secretary of the Party. Using Soviet archives, the author points to differences between the individual members of the Party leadership, and particularly to the lack of unity amongst the so-called ''healthy forces''. According to him, it is fair to talk about the disintegration of this bloc, which had been formed during the Prague Spring, into several smaller groups. The secretary of the Central Committee of the Czechoslovak Communist Party, Vasil Biľak (1917-2014), was, in consequence of this and Soviet pressure, forced to abandon any ambitions tostand at the head of the Party, and had to be satisfi ed, instead, with the position of Number Two in the Party. The Soviet leadership derived social stability in Czechoslovakia from the fi rmness of the Czechoslovak Communist Party leadership, and in particular counted on the collaboration of Husák and Biľak, and it made this clear to both men. Svoboda’s failing health prevented him from properly discharging his duties as President of Czechoslovakia, but he did not even try to hold on to the presidency, even though, in the interest of political stability, he was confi rmed in offi ce in March 1973, and remained something of a temporary solution. The article does not seek to challenge or confi rm the hypothesis that he was forced to step down in May 1975; although, in any event, Svoboda was in no condition to have taken this step himself. Husák’s efforts to become President kept running up against the question of the accumulation of offi ces and also the Czech-Slovak national factor, even though, thanks to centrist Czechoslovak policy and support from Moscow, he succeeded in achieving a ‘peculiar unity’ over this question in the CPCz leadership, so that on 29 May 1975 he became the fi rst, and also the last, Czechoslovak President who was a Slovak. In Czech eyes, however, he remained a Slovak who had, after August 1968, considerably participated in the unfortunate re-imposition of hard-line Communism known as ''normalization'', whereas for the Slovak nation he increasingly became a turncoat, a ''Prague Slovak''.
The influence of the steel strip cracking at the wound part of the high pressure compound vessel on the stress, strain and vessel safety has been investigated. An equivalent orthotropic material model with the zero tangential elasticity modulus Et has been utilised to describe this phenomenon. The stress and strain analysis was carried out by means of the problem oriented finite element method (F EM) code PROKOP [2]. The damaged strip packet of thickness 10 mm at any radial position influences negatively the vessel safety. The steel strip cracking near the inner winding radius is more dangerous than the cracking near the outer radius. and Obsahuje seznam literatury
In this paper, we prove that for a given positive continuous t-norm there is a fuzzy metric space in the sense of George and Veeramani, for which the given t-norm is the strongest one. For the opposite problem, we obtain that there is a fuzzy metric space for which there is no strongest t-norm. As an application of the main results, it is shown that there are infinite non-isometric fuzzy metrics on an infinite set.
We assign to each pair of positive integers $n$ and $k\ge 2$ a digraph $G(n,k)$ whose set of vertices is $H=\{0,1,\dots ,n-1\}$ and for which there is a directed edge from $a\in H$ to $b\in H$ if $a^k\equiv b\pmod n$. We investigate the structure of $G(n,k)$. In particular, upper bounds are given for the longest cycle in $G(n,k)$. We find subdigraphs of $G(n,k)$, called fundamental constituents of $G(n,k)$, for which all trees attached to cycle vertices are isomorphic.