Win-stay lose-shift strategy in formation changes in football

Managerial decision making is likely to be a dominant determinant of performance of teams in team sports. Here we use Japanese and German football data to investigate correlates between temporal patterns of formation changes across matches and match results. We found that individual teams and managers both showed win-stay lose-shift behavior, a type of reinforcement learning. In other words, they tended to stick to the current formation after a win and switch to a different formation after a loss. In addition, formation changes did not statistically improve the results of succeeding matches.The results indicate that a swift implementation of a new formation in the win-stay lose-shift manner may not be a successful managerial rule of thumb.Comment: 7 figures, 11 table

Second-order phase transition in the Heisenberg model on a triangular lattice with competing interactions

We discover an example where the dissociation of the Z2 vortices occurs at the second-order phase transition point. We investigate the nature of phase transition in a classical Heisenberg model on a distorted triangular lattice with competing interactions. The order parameter space of the model is SO(3)xZ2. The dissociation of the Z2 vortices which comes from SO(3) and a second-order phase transition with Z2 symmetry breaking occur at the same temperature. We also find that the second-order phase transition belongs to the universality class of the two-dimensional Ising model.Comment: 5 pages, 3 figure

Phase Transition in Potts Model with Invisible States

We study phase transition in the ferromagnetic Potts model with invisible states that are added as redundant states by mean-field calculation and Monte Carlo simulation. Invisible states affect the entropy and the free energy, although they do not contribute to the internal energy. The internal energy and the number of degenerated ground states do not change, if invisible states are introduced into the standard Potts model. A second-order phase transition takes place at finite temperature in the standard $q$-state ferromagnetic Potts model on two-dimensional lattice for $q=2,3$, and 4. However, our present model on two-dimensional lattice undergoes a first-order phase transition with spontaneous $q$-fold symmetry breaking ($q=2,3$, and 4) due to entropy effect of invisible states. We believe that our present model is a fundamental model for analysis of a first-order phase transition with spontaneous discrete symmetry breaking.Comment: 8 pages, 4 figure

Phase Transition of Generalized Ferromagnetic Potts Model - Effect of Invisible States -

We investigate the nature of the phase transition of the ferromagnetic Potts model with invisible states. The ferromagnetic Potts model with invisible states can be regarded as straightforward extension of the standard ferromagnetic Potts model. The invisible states contribute the entropy, however they do not affect the internal energy. They also do not change the symmetry which breaks at the transition temperature. The invisible states stimulate a first-order phase transition. We confirm that the first-order phase transition with spontaneous $q$-fold symmetry breaking for $q=2,3$, and 4 takes place even on two-dimensional lattice by Monte Carlo simulation. We also find that the transition temperature decreases and the latent heat increases as the number of invisible states increases.Comment: 7 pages, 5 figures, Contribution to the Proceedings of STATPHYS-Kolkata VII, November 26-30, 201

Population changes in residential clusters in Japan

Population dynamics in urban and rural areas are different. Understanding factors that contribute to local population changes has various socioeconomic and political implications. In the present study, we use population census data in Japan to examine contributors to the population growth of residential clusters between years 2005 and 2010. The data set covers the entirety of Japan and has a high spatial resolution of 500$\times$500$\textrm{m}^2$, enabling us to examine population dynamics in various parts of the country (urban and rural) using statistical analysis. We found that, in addition to the area, population density, and age, the shape of the cluster and the spatial distribution of inhabitants within the cluster are significantly related to the population growth rate of a residential cluster. Specifically, the population tends to grow if the cluster is "round" shaped (given the area) and the population is concentrate near the center rather than periphery of the cluster.Comment: 3 figures, 4 table

Double-q\it q Order in a Frustrated Random Spin System

We use the three-dimensional Heisenberg model with site randomness as an effective model of the compound Sr(Fe$_{1-x}$Mn$_x$)O$_2$. The model consists of two types of ions that correspond to Fe and Mn ions. The nearest-neighbor interactions in the ab-plane are antiferromagnetic. The nearest-neighbor interactions along the c-axis between Fe ions are assumed to be antiferromagnetic, whereas other interactions are assumed to be ferromagnetic. From Monte Carlo simulations, we confirm the existence of the double-$\boldsymbol{q}$ ordered phase characterized by two wave numbers, $(\pi\pi\pi)$ and $(\pi\pi0)$. We also identify the spin ordering pattern in the double-$\boldsymbol{q}$ ordered phase.Comment: 5pages, 3figure

Repositioning the Story Concept in Marketing Studies : A New Perspective of Consumption Desire Analysis

The purpose of this paper is to discuss the revisit of story concept in the Marketing studies. First, we point out the question of the story function in marketing activities such as advertising to emerge a specific consumer desire. Second, we reconfirm some points that our previous studies discussed in the advertising study. Third, as our perspective, we introduce the concept of "text" to understand the story function. Fourth, we describe that Softbank TV CM creates a specific consumer desire by using story functions. Fifth, we will discuss about the concept of Textualized Me and Desire Shape those are key concepts to describe the mechanism of consumer desire emerging.As a conclusion, we emphasize that the dichotomy of Following Model and Differentiation is overridden. It means we revisit the traditional perspective of the Marketing studies in this paper

Tracer-encapsulated solid pellet injection system

he method of tracer-encapsulated solid pellet (TESPEL) is now flourishing in various fields. The original purpose to study impurity transport without giving substantial perturbation on the plasma is implemented successfully for years. In addition to this, TESPEL is being intensively applied to study thermal (especially non-local) transport, high energy particles with the use of TESPEL ablation cloud, and spectroscopy from the viewpoint of atomic data. It is now further growing up to the utilization of multiple tracer methods which was not planned at the initial phase of the project. The proof-of-principle experiment using triple tracers has been successfully implemented. This opens a way to compare the Z dependence or mass dependence of impurity transport. In this article, as TESPEL is used in a variety of fields, the TESPEL injection system is summarized together with the method of TESPEL production, TESPEL storage disk, TESPEL guide system, and the differential pumping system. Also, the observation system for TESPEL flight and TESPEL ablation is explained

コキャク コミュニケーション ニ オケル ジュヨウ ノ サイ ソシキカ

本稿では、セールスパーソンが営業実践によってその都度顧客を立ち上げ、個々の顧客の需要を立ち上げることによって販売を達成していることを指摘し、かつ「営業には高度で特殊な能力は必要ではない」ことを主張する。まず第1節では、スカンジナビア航空のカールソンとノードストローム百貨店のサンダースによる「顧客コミュニケーション」の考え方が示される。第2節では、ノードストローム百貨店に来店した2人の女性客がドレスを求める事例をもとに、顧客・需要概念が再検討される。第3節では、筆者自身によるフィールドワークの事例から、某外資系生命保険営業における「顧客コミュニケーション」の場面の実際が明らかにされる。第4節では、認知科学における状況論的アプローチに依拠しつつ認知的道具をめぐって、前節の事例が分析される。そして第5節では、本稿の結論とセールスマネジメントに対するインプリケーションが提示されることにな