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Article
Second-order effects of mutation in a continuous model of indirect reciprocity
We have developed a continuous model of indirect reciprocity and thereby investigated effects of mutation in assessment rules. Within this continuous framework, the difference between the resident and mutant n...
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Article
Safety of applying influenza-antigen-coated microneedles to rat skin and the antigen specific immune response in vivo
Technological advancements and innovations in the use of microneedles for medicinal purposes are constantly emerging. To promote the marketing of microneedles, the safety of microneedle systems during applicat...
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Article
Open AccessSocial dilemma in foraging behavior and evolution of cooperation by learning
We consider foraging behaviors in a two-dimensional continuum space and show that a cooperative chasing strategy can emerge in a social dilemma. Predators can use two different chasing strategies: A direct cha...
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Article
Open AccessEvolution of direct reciprocity in group-structured populations
People tend to have their social interactions with members of their own community. Such group-structured interactions can have a profound impact on the behaviors that evolve. Group structure affects the way pe...
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Article
Democracy and polarization in the National Assembly of the Republic of Korea
The median-voter hypothesis predicts convergence of party platforms across a one-dimensional political spectrum during majoritarian elections. Assuming that the convergence is reflected in legislative activity...
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Open AccessSocial norms in indirect reciprocity with ternary reputations
Indirect reciprocity is a key mechanism that promotes cooperation in social dilemmas by means of reputation. Although it has been a common practice to represent reputations by binary values, either ‘good’ or ‘...
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Article
Open AccessLocal stability of cooperation in a continuous model of indirect reciprocity
Reputation is a powerful mechanism to enforce cooperation among unrelated individuals through indirect reciprocity, but it suffers from disagreement originating from private assessment, noise, and incomplete i...
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Article
Epicutaneous Allergen Administration with Microneedles as a Novel Method of Immunotherapy for House Dust Mite (HDM) Allergic Rhinitis
Epicutaneous immunotherapy (EPIT) is being studied as a method for treating allergic rhinitis because of skin immunology, user convenience and enhanced patient compliance. However, the use of EPIT is limited b...
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Article
Open AccessFive rules for friendly rivalry in direct reciprocity
Direct reciprocity is one of the key mechanisms accounting for cooperation in our social life. According to recent understanding, most of classical strategies for direct reciprocity fall into one of two classe...
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Open AccessAutomata representation of successful strategies for social dilemmas
In a social dilemma, cooperation is collectively optimal, yet individually each group member prefers to defect. A class of successful strategies of direct reciprocity were recently found for the iterated priso...
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Article
Agent-Based Simulation of the Two-Dimensional Patlak-Keller-Segel Model
The Patlak-Keller-Segel equation describes the chemotactic interactions of small organisms in the continuum limit, and a singular peak appears through spontaneous aggregation when the total mass of the organis...
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Article
Phosphate-Functionalized Stabilized F127 Nanoparticles: Introduction of Discrete Surface Charges and Electrophoretic Determination of Aggregation Number
Pluronic F127 forms spherical micelle with a defined number of molecules aggregated in aqueous environments. Such self-assembled micelles dissociate into unimers below certain concentration and temperature. We...
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Open AccessFree energy of a chemotactic model with nonlinear diffusion
The Patlak-Keller-Segel equation is a canonical model of chemotaxis to describe self-organized aggregation of organisms interacting with chemical signals. We investigate a variant of this model, assuming that ...
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Article
Meshfree local radial basis function collocation method with image nodes
We numerically solve two-dimensional heat diffusion problems by using a simple variant of the meshfree local radial-basis function (RBF) collocation method. The main idea is to include an additional set of sam...
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Article
A portable electromagnetic induction heating device for point-of-care diagnostics
This paper introduces a portable magnetic field generator for producing wireless induction heating, which has recently been introduced as one of the major thermal techniques in the point-of-care (POC) diagnost...
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Open AccessComparing reactive and memory-one strategies of direct reciprocity
Direct reciprocity is a mechanism for the evolution of cooperation based on repeated interactions. When individuals meet repeatedly, they can use conditional strategies to enforce cooperative outcomes that wou...
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Article
Anomalous response in the vicinity of spontaneous symmetry breaking
We propose a mechanism to induce negative AC permittivity in the vicinity of a ferroelectric phase transition involved with spontaneous symmetry breaking. This mechanism makes use of responses at low frequency...
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Article
Quantum isothermal reversible process of particles in a box with a delta potential
For an understanding of a heat engine working in the microscopic scale, it is often necessary to estimate the amount of reversible work extracted by isothermal expansion of the quantum gas used as its working ...
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Article
Open AccessUniversal statistics of the knockout tournament
We study statistics of the knockout tournament, where only the winner of a fixture progresses to the next. We assign a real number called competitiveness to each contestant and find that the resulting distribu...
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Article
Internal energy density of the critical three-state Potts model on the kagome lattice
The internal energy density of the Potts model on a semi-infinite strip with a width L has been conjectured to have no finite-size corrections at the critical point K = K ...
