Influence of Food and Larval Age on the Defensive Chemistry of Satumia pyri

2001 ◽  
Vol 56 (1-2) ◽  
pp. 89-94 ◽  
Author(s):  
Reinhold Deml

Abstract Scolus secretions and hemolymph of caterpillars of Satumia pyri fed with two different foodplants (Crataegus monogyna, Prunus spinosa) were chemically analyzed and their chemical similarities determined. The secondary-compound patterns obtained for the two body fluids showed no significant differences when compared between the two groups of alterna­ tively fed last-instar larvae. Thus, the composition of these fluids of full-grown caterpillars is not influenced by the larval diet. However, younger larvae on P. spinosa revealed a diversity of compounds differing significantly from that of larger caterpillars fed with either C. mono­gyna (both body fluids) or P. spinosa (hemolymph only). This indicates that, on the one hand, the hemolymph composition is adapted to the changing physiological requirements of the given instars whereas, on the other hand, the defensive mixtures remain unaltered in the late larval instars due to a constant spectrum of potential enemies.

2019 ◽  
Vol 150 (4) ◽  
pp. 1853-1870 ◽  
Author(s):  
R. I. Dmytryshyn

AbstractIn the paper the correspondence between a formal multiple power series and a special type of branched continued fractions, the so-called ‘multidimensional regular C-fractions with independent variables’ is analysed providing with an algorithm based upon the classical algorithm and that enables us to compute from the coefficients of the given formal multiple power series, the coefficients of the corresponding multidimensional regular C-fraction with independent variables. A few numerical experiments show, on the one hand, the efficiency of the proposed algorithm and, on the other, the power and feasibility of the method in order to numerically approximate certain multivariable functions from their formal multiple power series.


Author(s):  
Marion Ledwig

Spohn's decision model, an advancement of Fishburn's theory, is valuable for making explicit the principle used also by other thinkers that 'any adequate quantitative decision model must not explicitly or implicitly contain any subjective probabilities for acts.' This principle is not used in the decision theories of Jeffrey or of Luce and Krantz. According to Spohn, this principle is important because it has effects on the term of action, on Newcomb's problem, and on the theory of causality and the freedom of the will. On the one hand, I will argue against Spohn with Jeffrey that the principle has to be given up. On the other, I will try to argue against Jeffrey that the decision-maker ascribes subjective probabilities to actions on the condition of the given decision situation.


Author(s):  
Hans-Jörg Schwenk

The present paper deals with the relationship between contrastive linguistics on the one hand and foreign language teaching on the other hand, more precisely, with the influence exerted by the first on the latter. It goes without saying that a teacher who teaches his mother tongue is expected to teach it as completely and correctly as possible. Yet the complete and correct teaching of any language depends on the teacher’s complete and correct knowledge of the given language and, comes to that, his awareness of this knowledge. It could be shown and proven on various examples that this aim can only be reached by the way of analyzing an other / a foreign language and comparing it with the language / the mother tongue to be teached, that, as much as paradoxical this may sound, self-understanding quite often needs the understanding of the other.


2018 ◽  
Vol 11 (1) ◽  
pp. 86-105 ◽  
Author(s):  
Milada Walková

The tension between the need to present oneself in academic discourse unobtrusively on the one hand and promotionally on the other hand results in a range of options of hiding and revealing authorial presence in the text. The choice from among these options is, among other factors, determined by cultural background. This paper explores how Anglophone writers and Slovak authors writing in Slovak and in non-native English position themselves in linguistic research papers as individuals or as part of a society, and as participants or non-participants of the given communicative exchange. The study concludes that English academic culture is largely individualistic while Slovak academic culture is largely collectivist, a trait that Slovak authors also transmit into their writing in English for a mainly local audience.


Author(s):  
Aleksandr Mishurin

In the given article, the author offers an interpretation of the work titled Lacedaimonion Politeia, written by the ancient political philosopher Xenophon of Athens. Judging from Xenophon’s sober and open-minded attitude to the regime he researches, the author focuses on the central issue of the treatise, namely, the upbringing of a virtuous or good citizen. This became the cornerstone of Sparta’s success as a polis, and provided it with a fame as a unique political entity praised by all, but copied by none. The author identifies the three stages of the Spartan education given by Xenophon and continues with the practices of its implementation at a mature age. The research makes it clear that the purpose of the laws of Lycurgus, as described by Xenophon, is twofold. On the one hand, the given laws instill respect, obedience, and the virtue of manliness which the lawgiver desired in citizens. On the other hand, the laws create citizens who merely imitate the above-described traits of character and law-abidance, and who are actually more like unmitigated criminals constantly fighting with each other. It is the second type of people—good criminals—who find themselves in power in Sparta, and they are the ones who end up destroying the Spartan state. By providing this diagnosis of the Spartan regime and the laws of Lycurgus, Xenophon attempts to show that handling the problem of the education of good citizens as suggested in Sparta is misguided and requires additional deliberation.


1983 ◽  
Vol 6 (2) ◽  
pp. 285-295 ◽  
Author(s):  
J. A. Adepoju ◽  
M. Nassif

The effectiveness properties, in Faber regions, of the transposed inverse of a given basic set of polynominals, are investigated in the present paper. A certain inevitable normalizing substitution, is first formulated, to be undergone by the given set to ensure the existence of the transposed inverse in the Faber region. The first main result of the present work (Theorem 2.1), on the one hand, provides a lower bound of the class of functions for which the normalized transposed inverse set is effective in the Faber region. On the other hand, the second main result (Theorem 5.2) asserts the fact that the normalized transposed inverse set of a simple set of polynomials, which is effective in a Faber region, should not necessarily be effective there.


Author(s):  
Victoria Ferenc

Hungarians in Ukraine have a well organized educational system that covers institutions from the kindergarten to the university. At first glance it may look like that the maintenance of the Transcarpathian Hungarians in Ukraine is guaranteed, however, we have to see that minority education (which is one of the key-issue of the maintenance of the community) is threatened by several factors. In the given paper I will take under investigation only two of these factors. On the one hand the Ukrainian state language policy would like to strengthen the position of the state language even at the expense of other languages and education is used as a means of achieving these aims. On the other hand, while education is one of the effective and powerful means of achieving social goals of the minority and choosing the language of instruction is a crucial part of language education policy, minority universities neglect serious language planning activity. It is high time forevery institute to work out an individual university language policytaking into account their own aims and personal conditions.


2021 ◽  
Vol 13 (2) ◽  
pp. 167-190
Author(s):  
Gero Szepannek ◽  
Laila Westphal ◽  
Werner Gronau ◽  
Tine Lehmann

Abstract The article at hand is driven by a methodological interest in the opportunities and challenges of applying an automated text mining approach, particularly a sentiment analysis on various tourism blogs at the same time. The study aims to answer the question to what extent advanced computational methods can improve the data acquisition and analysis of unstructured data sets stemming from various blogs and forums. Furthermore, the authors intend to explore to what extent the sentiment analysis is able to objectify the qualitative results identified by an earlier analysis by the authors using content analysis done by thematic coding. For the purpose of the specific tourism research question in this paper a new approach is proposed, which consists of a combination of sentiment analyses, supervised learning, and dimensionality reduction in order to identify terms that strongly load on specific emotions. The contribution indicates on the one hand, that advanced computational methods have their own specific constraints, but on the other hand, are able to provide a richer and deeper analysis following a quantitative approach. Several issues have to be taken into account, such as data protection constraints, the need for data cleaning, such as word stemming, dimension reduction, such as removal of custom stop words, and the development of descent ontologies. On the other hand, the quantitative method also provides, due to its standardised procedure, a less subjective insight in the given content, but is not less time consuming than traditional content analysis.


1878 ◽  
Vol 27 (185-189) ◽  
pp. 417-419

In the year 1866 was published in the “Proceedings of the Royal Irish Academy” a paper "On the Equations of Circles, which contained extension of many known theorems. Thus it was proved in it that the same forms of equation which are true for a circle inscribed in a plane or spherical triangle hold also when the right lines in the one case, or the great circles in the other, are replaced by any three circles in the plane or sphere, and it was shown that the transformed equations represented the pairs of circles which touch the three given circles. The results for circles on the sphere were still further, extended, namely, to conics having double contact with a given conic. The paper contained, in addition to these fundamental investigations, many collateral ones on allied subjects. The memoir, of which I now give an abstract, extends the results of the foregoing paper to a polygon of any number of sides inscribed or circumscribed to a given circle. It is proved for the case of circumscribed figures, that the sides of the polygon may be replaced both on the plane and sphere, by circles touching the given circle; and again, these results may be still further extended to conics having double contact with a given conic. A very large amount of geometry is embraced in the paper, and many subjects of much interest are discussed, showing the great fertility of the methods of investigation employed.


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