Crossover and noncrossover recombination during meiosis: timing and pathway relationships.

During meiosis, crossovers occur at a high level, but the level of noncrossover recombinants is even higher. The biological rationale for the existence of the latter events is not known. It has been suggested that a noncrossover-specific pathway exists specifically to mediate chromosome pairing. Using a physical assay that monitors both crossovers and noncrossovers in cultures of yeast undergoing synchronous meiosis, we find that both types of products appear at essentially the same time, after chromosomes are fully synapsed at pachytene. We have also analyzed a situation in which commitment to meiotic recombination and formation of the synaptonemal complex are coordinately suppressed (mer1 versus mer1 MER2++). We find that suppression is due primarily to restoration of meiosis-specific double-strand breaks, a characteristic of the major meiotic recombination pathway. Taken together, the observations presented suggest that there probably is no noncrossover-specific pathway and that restoration of intermediate events in a single pairing/recombination pathway promotes synaptonemal complex formation. The biological significant of noncrossover recombination remains to be determined, however.

A historical account of types of fuzzy sets and their relationships

In this paper, we review the definition and basic properties of the different types of fuzzy sets that have appeared up to now in the literature. We also analyze the relationships between them and enumerate some of the applications in which they have been used.

An approach based on Logic Forms and WordNet relationships to Textual Entailment performance

This paper outlines the approach adopted by the PLSI research group at University of Alicante in the PASCAL-2006 second Recognising Textual Entailment challenge. Our system is composed of several components. On the one hand, the first component performs the derivation of the logic forms of the text/hypothesis pairs and, on the other hand, the second component provides us with a similarity score given by the semantic relations between the derived logic forms. In order to obtain this score we apply several measures of similitude and relatedness based on the structure and content of WordNet.

Syntactic and Semantic Relationships in Models of Complex Systems: An Ecological Case

In this paper, the authors extend and generalize the methodology based on the dynamics of systems with the use of differential equations as equations of state, allowing that first order transformed functions not only apply to the primitive or original variables, but also doing so to more complex expressions derived from them, and extending the rules that determine the generation of transformed superior to zero order (variable or primitive). Also, it is demonstrated that for all models of complex reality, there exists a complex model from the syntactic and semantic point of view. The theory is exemplified with a concrete model: MARIOLA model.

Revision of the Sauropterygian reptile genus Cymatosaurus v. Fritsch, 1894, and the relationships of Germanosaurus Nopcsa, 1928, from the Middle Triassic of Europe / Olivier Rieppel --.

n.s. no.36(1997)

Russia and its Near Neighborhood: Competition and Conflict within the EU. Natolin Research Paper 04/May 2011

Russia in 2004 politely rejected the offer to become a participant in the European Neighbourhood Policy, preferring instead to pursue bilateral relations with the EU under the heading of ‘strategic partnership’. Five years later, its officials first reacted with concern to the ENP’s eastern dimension, the Eastern Partnership initiative. Quickly, however, having become convinced that the project would not amount to much, their concern gave way to indifference and derision. Furthermore, Russian representatives have failed to support idealistic or romantic notions of commonality in the area between Russia and the EU, shunned the terminology of ‘common European neighbourhood’ and replaced it in EU-Russian documents with the bland reference to ‘regions adjacent to the EU and Russian borders’. Internally, the term of the ‘near abroad’ was the official designation of the area in the Yeltsin era, and unofficially it is still in use today. As the terminological contortions suggest, Moscow officials consider the EU’s eastern neighbours as part of a Russian sphere of influence and interest. Assurances to the contrary notwithstanding, they look at the EU-Russia relationship as a ‘zero-sum game’ in which the gain of one party is the loss of the other. EU attempts to persuade the Russian power elite to regard cooperation in the common neighbourhood not as a competitive game but providing ‘win-win’ opportunities have been to no avail. In fact, conceptual approaches and practical policies conducted vis-à-vis the three Western CIS countries (Belarus, Ukraine and Moldova) and the southern Caucasus (Georgia, Armenia and Azerbaijan) confirm that, from Moscow’s perspective, processes of democratisation, liberalisation and integration with Western institutions in that region are contrary to Russian interests. In each and every case, therefore, the area’s ‘frozen conflicts’ have not been regarded by the Kremlin as an opportunity to promote stability and prosperity in the countries concerned but as an instrument to prevent European choices in their domestic and foreign policy. The current ‘reset’ in Russia’s relations with the United States and the ‘modernisation partnership’ with the EU have as yet failed to produce an impact on Russia’s policies in ‘its’ neighbourhood. The EU is nevertheless well advised to maintain its course of attempting to engage that country constructively, including in the common neighbourhood. However, its leverage is small. For any reorientation to occur in Moscow towards perceptions and policies of mutual benefit in the region, much would depend on Russia’s internal development.

Ethnic Politics, Regime Support and Conflict in Central and Eastern Europe

Ethnicity and ethnic parties have often been portrayed as a threat to political stability. There is also no shortage of conflicts with an ethnic flavor. Yet, this book challenges the notion that the organization of politics in heterogeneous societies should necessarily overcome ethnicity. Rather, descriptive representation of ethnic groups arguably has potential to increase regime support and reduce conflict. The book studies partisan-descriptive representation of up to 130 ethnic groups in central and eastern European democracies. Ethnic minority parties are found to only run and succeed if they can expect electoral support sufficient to pass the electoral threshold. Conditional on gender and strategies of representation, ethnic representation increases satisfaction with democracy among the minority population. While protest rises given moderate levels of representation, it is reduced once ethnic groups have access to executives. In conclusion, a proportional vision of power-sharing between ethnic groups receives some qualified empirical support.

Soil and plant relationships of fission products /

"Prepared for Presentation at the Hearings on Fallout Before the Joint Committee on Atomic Energy, May 5-8, 1959."

On actors and the art of acting /

Mode of access: Internet.

Europe in the nineteenth century; a documentary analysis of change and conflict,

v. 1. 1815-1870.--v. 2. 1870-1914.

Hydraulic and geometrical relationships of lay-flat irrigation tubing /

Caption title.

Trinity, polyphony and pastoral relationships

The author explores the Christian doctrine of the Trinity to shed light on the nature of the pastoral ministry. Using the trinitarian term, "polyphony" (David Cunningham) for this purpose, he explicates unity and difference as key polyphonic categories in the doctrine of the Trinity. The author suggests that the polyphonic notes sounded by pastoral caregivers are toughness and tenderness, woundedness and health, wisdom and folly, and communion, nearness and distance.