Search results for "COMPETITION"
showing 10 items of 1409 documents
Complex ecological models with simple dynamics: From individuals to populations
1994
The aim of this work is to study complex ecological models exhibiting simple dynamics. We consider large scale systems which can be decomposed into weakly coupled subsystems. Perturbation Theory is used in order to get a reduced set of differential equations governing slow time varying global variables. As examples, we study the influence of the individual behaviour of animals in competition and predator-prey models. The animals are assumed to do many activities all day long such as searching for food of different types. The degree of competition as well as the predation pressure are dependent upon these activities. Preys are more vulnerable when doing some activities during which they are …
The review of internet marketing use in Latvia's companies
2017
Development of new technologies and increasing competition require new solutions in business applications in internet marketing and advertising. The paper deals with issues related to advertising activities in internet marketing. There were presented both theoretical findings and empirical analysis of the survey conducted among Latvia's companies. The survey was carried out with the assistance of telemarketing company (telephone interviews) among companies selected from Register of Enterprises LURSOFT. The analysis of survey results compared companies responses depending on the company size and turnover changes during the last three years. Various statistical indicators were used for this a…
Competition between inter- and intra- molecular energy exchanges in a simple quantum model of a dimer
2006
Abstract We propose a fully quantum model to describe the dynamics of a possible radiationless energy transfer process between identical and nearly localized molecules or monomers coupled through a dipole–dipole term. The system is studied as an environmentally isolated dimeric pair and we find that its dynamics exhibits a competition between the process ruling out the transfer of energy among different degrees of freedom of a given monomer and the one steering the intermolecular passage of excitations from a monomer to the other one. Such a competition is quantitatively characterized investigating on the temporal behaviour of quantum covariances of some couples of appropriate observables h…
Santa Rosalia, the icon of biodiversity
2010
This article summarizes the results presented in a series of invited contributions which were submitted to celebrate the fiftieth anniversary of publication of the seminal article ‘‘Homage to Santa Rosalia or why are there so many kinds of animals’’ by G.E. Hutchinson. The authors were asked to explore old and new paradigms of biodiversity in aquatic ecosystems. The contributions by Hutchinson in this field are truly landmarks in the history of modern ecological sciences. The authors of the contributed articles, stimulated by one of the most fruitful concept articles in ecology that has appeared over the last half century, have shown that scientific investigation, although still seeking the…
Sporta pasākumu fotogrāfiju pārvaldības sistēma
2021
Darbā tiek aprakstīta masu sacensību fotogrāfiju pārvaldības sistēma. Ar sistēmas palīdzību sacensību organizētāji un sacensību fotogrāfi var publicēt sacensību fotogrāfijas, savukārt sistēmas lietotāji fotogrāfijas var apskatīt un iegādāties fotogrāfiju orģinālus. Programmatūra tiek izstrādāta kā tīmekļa vietne, kas ir brīvi pieejama jebkuram interneta lietotājam. Izstrādātā programmatūra ir modulis no lielākas sacensību pārvaldības sistēmas, kas pieejama tīmekļa vietnē https://distantrace.com/. Programmatūra izstrādāta izmantojot programmēšanas valodas “Python”, “TypeScript” un “HTML5”, satvaru “Django”.
The chemistry of competition: exploitation of heterospecific cues depends on the dominance rank in the community
2014
Interspecific competition is an important ecological mechanism shaping the traits of the interacting species and structuring their communities. Less competitive species benefit from evading direct encounters with aggressive dominants, whereas dominant species could use cues left by subordinates to steal their resources or to chase them off. Here, we studied competitive interactions among five common and syntopic ant species in Central Europe (Formica polyctena, Formica rufibarbis, Lasius niger, Myrmica rubra and Tetramorium caespitum) and investigated their ability to react to heterospecific chemical cues. Using aggression assays, we established a clear dominance hierarchy of these species,…
Quantized Dissensus in Networks of Agents subject to Death and Duplication
2012
Dissensus is a modeling framework for networks of dynamic agents in competition for scarce resources. Originally inspired by biological cells behaviors, it fits also marketing, finance and many other application areas. Competition is often unstable in the sense that strong agents, those having access to large resources, gain more and more resources at the expense of weak agents. Thus, strong agents duplicate when reaching a critical amount of resources, whereas weak agents die when loosing all their resources. To capture all these phenomena we introduce systems with a discrete time gossip and unstable state dynamics interrupted by discrete events affecting the network topology. Invariancy o…
Client orientation in fashion e-commerce: a comparative study
2020
[EN] E-business and especially e-commerce represents one of the most important ways of doing business in the current context. That is why, researchers are doing a great effort in studying how Business to Consumer platforms manage the relationship with their clients. Regarding the most important channels of connection between consumers and companies in online market, the websites and Apps, this study analyzes the way in which e-businesses present the information to their clients from a client-focused strategy point of view. The present study evaluates how two important e-commerce companies deal with this in such a competitive market as fashion and aims to state some success guidelines for fa…
This time it’s different? Effects of the Eurovision Debate on young citizens’ and its consequence for EU democracy – evidence from a quasi-experiment…
2017
For the very first time in EU history, the 2014 EP elections provided citizens with the opportunity to influence the nomination of the Commission President by casting a vote for the main Europarties’ ‘lead candidates’. By subjecting the position of the Commission President to an open political contest, many experts have formulated the expectation that heightened political competition would strengthen the weak electoral connection between EU citizens and EU legislators, which some consider a root cause for the EU’s lack of public support. In particular, this contest was on display in the so-called ‘Eurovision Debate’, a televised debate between the main contenders for the Commission Presiden…
Within-host evolution decreases virulence in an opportunistic bacterial pathogen
2015
Abstract Background Pathogens evolve in a close antagonistic relationship with their hosts. The conventional theory proposes that evolution of virulence is highly dependent on the efficiency of direct host-to-host transmission. Many opportunistic pathogens, however, are not strictly dependent on the hosts due to their ability to reproduce in the free-living environment. Therefore it is likely that conflicting selection pressures for growth and survival outside versus within the host, rather than transmission potential, shape the evolution of virulence in opportunists. We tested the role of within-host selection in evolution of virulence by letting a pathogen Serratia marcescens db11 sequent…