Phase transitions for rock-scissors-paper game on different networks

Monte Carlo simulations and dynamical mean-field approximations are performed to study the phase transitions in rock-scissors-paper game on different host networks. These graphs are originated from lattices by introducing quenched and annealed randomness simultaneously. In the resulting phase diagrams three different stationary states are identified for all structures. The comparison of results on different networks suggests that the value of clustering coefficient plays an irrelevant role in the emergence of a global oscillating phase. The critical behavior of phase transitions seems to be universal and can be described by the same exponents.Comment: 4 pages, 4 figures, to be published in PR

Generalized mean-field study of a driven lattice gas

Generalized mean-field analysis has been performed to study the ordering process in a half-filled square lattice-gas model with repulsive nearest neighbor interaction under the influence of a uniform electric field. We have determined the configuration probabilities on 2-, 4-, 5-, and 6-point clusters excluding the possibility of sublattice ordering. The agreement between the results of 6-point approximations and Monte Carlo simulations confirms the absence of phase transition for sufficiently strong fields.Comment: 4 pages (REVTEX) with 4 PS figures (uuencoded

A REGRESSION MODEL

In the normal linear regression the least square estimation of the coefficients has a series of nice properties. In addition the needed numerical calculations may be done a fairly efficient way. For the case when the application of this widely used least square method is not justified some further methods are suggested. But experience about their statistical and numerical properties can hardly be found. This paper intends to help the practitioner to become familiar with a type of non-least-square regression methods

Lattice Covering by Semicrosses of Arm Length 2

Using algebraic and graph theoretical methods we provide an algorithm to determine the integer lattice covering constant of a certain type of n-dimensional cubistic polyhedron. In particular, we verify a special case of a conjecture of S. K. Stein on covering finite abelian groups by cyclic subsets

Chio Chips termékek összehasonlító érzékszervi vizsgálata

A pontozásos érzékszervi vizsgálat eredményei azt mutatták, hogy van összefüggés a 100 és 20 pontos rendszerben történő minősítés adatai között. Bár a Student-féle értékelés szerint a sós és a hagymás-tejfölös chips termékek között nem volt kimutatható szignifikáns különbség, de a Kramer próba szerint mindkét pontozásos rendszer esetében a hagymástejfölös ízesítésű chips termék jobbnak volt minősíthető, mit a sós. Based on the results of sensory evaluation of chips products there is a connection between the results of scoring in the 100 points and 20 points systems. Although there was no significant difference between the salted samples and the samples with flavour of onion and sour cream based on the Student evaluation, but to the Kramer method the chips with onion and sour cream seem to be better than the salted ones

Flow properties of driven-diffusive lattice gases: theory and computer simulation

We develop n-cluster mean-field theories (0 < n < 5) for calculating the flow properties of the non-equilibrium steady-states of the Katz-Lebowitz-Spohn model of the driven diffusive lattice gas, with attractive and repulsive inter-particle interactions, in both one and two dimensions for arbitrary particle densities, temperature as well as the driving field. We compare our theoretical results with the corresponding numerical data we have obtained from the computer simulations to demonstrate the level of accuracy of our theoretical predictions. We also compare our results with those for some other prototype models, notably particle-hopping models of vehicular traffic, to demonstrate the novel qualitative features we have observed in the Katz-Lebowitz-Spohn model, emphasizing, in particular, the consequences of repulsive inter-particle interactions.Comment: 12 RevTex page

Benefits of a marketing cooperative in transition agriculture: Mórakert purchasing and service co-operative

The paper analyses the potential benefits of marketing cooperatives in Hungary, employing a transaction cost economics framework. We found that the purchased quantity, the existence of contracts, flexibility and trust are the most important factors farmers consider when selling their products via a cooperative. The most striking result is that diversification has positive influences on the share of cooperatives in farmers’ sale. Furthermore, farmers with larger bargaining power have less willingness to sell their product to the cooperative. Surprisingly, asset specificity has rather negative effects on the share of cooperatives in members’ sales

Mikroelemek esszencialitása és az élelmiszervizsgálat = Essentiality of trace elements and food investigations

Miután az esszenciális és a nem létfontosságú mikroelemek egészséges szervezeten belüli koncentráció-eloszlása jelentős eltéréseket mutat, ez a tény felhasználható az adott mikroelem biológiai szerepének tisztázására. A létfontosságú elemeknél szűk a koncentráció-tartomány, az eloszlás normál eloszlású, nem esszenciális elemeknél a tartomány tág, az eloszlás lognormál. A vizsgált retekmintákban mért Li- és Srtartalom elemzése alapján az a következtetés adódik, hogy a magasabb rendű növények számára a Sr esszenciális, a Li viszont nem. Referencia mikroelemként a Zn szolgált, nyilvánvalóan esszenciális elem; amely eloszlása szűk koncentráció-tartományt és normál eloszlást mutatott. Az élelmiszerek nyomelem-tartalmának vizsgálata tehát segíthet a kérdéses mikroelemek biológiai szerepének tisztázásában. Because the concentration distribution of essential and non-essential micro elements within the healthy organisms shows significant difference, this fact can be used for clarification of biological role of the given elements. In case of essential elements the concentration range is narrow, the distribution is normal, in case of non-essential elements the interval is wide, the distribution is lognormal. Based on the measurements of Li and Sr content of radish samples the conclusion was the following: for higher plants Sr is essential, but Li is not. As a reference element Zn was used, which is definitely an essential element, and to the measurements the concentration range was narrow, the distribution normal. So, the trace element investigation of different foodstuffs can help for determination of biological role of micro elements