We investigate phase transitions of the XY model on a two-layer triangular lattice when interactions are competing, by using Monte Carlo simulations. For the system with a ferromagnetic interaction on one of two layers and an antiferromagnetic interaction on the other layer, we find two...

We investigate the effect of obstacles on formation of a traffic jam for a traffic flow in a network of city roads. We consider a square lattice of two bonds between two nearest crossings as a network of city roads; we assume that there are three lattice sites in a crossing. We put five...

We show that a partial ordering appears in the limit S → ∞ at the ground state of the 1D spin-S antiferromagnetic Ising model with next-nearest-neighbour interaction. This is an analogue of the ordering which appears at finite S = Sc ≈ 3 in the nearest-neighbour Ising antiferromagnet on...

We investigate phase transitions of XY model on a three-layer triangular lattice by assuming that the intralayer interactions on the first and the third layer are antiferromagnetic and the one on the second layer ferromagnetic. We use Monte Carlo simulations and find that there are two critical...

With gradually progressing climate change in the future, the frequency and scale of hot summers like those observed in various places around the world in recent years will undoubtedly increase, giving rise to strong concerns over increased risk of death due to heat stress. Based on this...

Several studies have reported a 'V'-shaped relationship between short-term temperature and mortality rates, characterized by mortality rates that are higher when the temperature is extremely low or high than when the temperature is moderate. To quantify the effect of adaptation to a certain...

This paper seeks to quantify existing financial barriers among East African Community (EAC) member countries based on analysis of each member country’s foreign exchange market. The primary contribution of this paper is the generation of an aggregate measure of financial barriers for the three...

We investigate storage capacity and generalization ability for two types of fully connected layered neural networks with non-monotonic transfer functions; random patterns are embedded into the networks by a Hebbian learning rule. One of them is a layered network in which a non-monotonic transfer...

An Ising model with frustration on a three-dimensional lattice is investigated. The system undergoes a phase transition from the paramagnetic to the ferromagnetic state or to a layered antiferromagnetic state. A re-entrant phase transition is observed for the system in some region of the values...

Occurrence of congestion of packet flow in computer networks is one of the unfavorable problems in packet communication and hence its avoidance should be investigated. We use a neural network model for packet routing control in a computer network proposed in a previous paper by Horiguchi and...