Nan Jeon University of Science and Technology

This study features an functional magnetic resonance imaging (fMRI) hyperscanning experiment from 2 sites, 305km apart. The experiment contains 2 conditions: the dyad collaborated to win and then split the reward in the cooperation condition, whereas the winner took all the reward in the competition condition, thereby resulting in dynamic strategic interactions. To calculate the cerebral coherence in such jittered event-related fMRI tasks, we first iteratively estimated the feedback-related blood oxygenation level-dependent responses of each trial, using 8 finite impulse response functions (16s) and then concatenated the beta volume series. With the right temporal-parietal junction (rTPJ) as the seed, the interpersonal connected brain areas were separately identified: the right superior temporal gyrus (rSTG) (cooperation) and the left precuneus (lPrecuneus) (competition), both peaking at the designated frequency bin (1/16s = 0.0625Hz), but not in permuted pairs. In addition, the extended coherence analyses on shorter and longer concatenated volumes verified that only in the optimal trial frequency did the rTPJ-rSTG and rTPJ-lPrecuneus couplings peak. In sum, our approach both showcases a flexible analysis method that widens the applicability of interpersonal coherence in the rapid event-related fMRI hyperscanning and reveals a context-based inter-brain coupling between interacting pairs during cooperation and during competition.

Cet article aborde la question de la conception collaborative de jeux dédiés à un usage éducatif à partir de l’analyse d’une game jam qui a permis de concevoir Mission Télomère, un jeu d’évasion destiné à la prévention du tabagisme chez des élèves de l’enseignement secondaire. La question de la collaboration est examinée à partir de l’analyse des verbatims d’entretiens conduits avec quatre des participants à la game jam. Les résultats obtenus montrent que l’approche méthodologique que nous avons mise en œuvre a permis aux différents concepteurs de faire évoluer et de partager leurs praxéologies, c’est-à-dire de converger du point de vue de leurs pratiques et de développer un discours commun sur la manière dont le jeu peut être conçu. Nous contribuons donc à la réflexion sur ce qu’est un jeu d’évasion et sur les modalités de conception de ce type de jeu en tant que dispositif techno-pédagogique complexe nécessitant, pour être conçu, une approche multi-expertise.

In the heat treatment process, blood perfusion starts up a negative feedback mechanism. The blood temperature undergoes a transient process before onset of equilibrium and then changes the situation of temperature distribution. In substance, the blood temperature undergoes a transient process for heat exchange between blood and tissue. For more fully exploring the heat transfer behavior of biological tissue, this paper analyzes the bioheat transfer problems with the nonconstant blood temperature based on the Pennes bioheat equation. A numerical scheme based on the Laplace transform is proposed for solving the present problems.

Dans cet article, l’auteur questionne le lien complexe entre le jeu vidéo et l’art en tentant de réfléchir à l’esthétique du jeu vidéo. Selon lui, le questionnement sur la qualité artistique du jeu vidéo repose principalement sur une confusion dans la définition de la notion d’art. Trois conceptions différentes semblent être en cause dans le discours général : le jeu vidéo comme production ou technique artistique, le jeu vidéo comme média audiovisuel, et le jeu vidéo comme pratique interactive. En distinguant à tour de rôle ces trois acceptions, l’auteur se penche également sur la question des styles visuels de jeu vidéo, alors que ces derniers contribuent de manière primordiale à la perception du jeu vidéo en tant qu’objet esthétique et culturel.

ABSTRACTWe present an exact analysis of axisymmetric bending of circular plates according to elasticity theory. On the basis of Hamiltonian state space approach, a rigorous solution of the problem is determined by means of separation of variables and symplectic eigenfunction expansion in a systematic way. The thickness effect on bending of circular plates and the applicability of the classical plate solutions for the problem are evaluated accordingly.

This paper investigates a new flat-panel type ceramic piezoelectric speaker. The proposed speaker offers a simple configuration compared to a conventional magnetic speaker. Piezoelectric materials can convert electrical energy into mechanical energy through a direct piezoelectric effect. The frequency and voltage signal captured by the output of the speaker driver are sampled. Those signals are sent to a fuzzy controller to regulate the value of a digital potentiometer. The output voltage gain of the piezoelectric speaker driver can be determined by the digital potentiometer value. Finally, this regulated voltage is sent to the piezoelectric speaker to improve low frequency response. The fuzzy controller membership function parameters are tuned using the Taguchi method to achieve the optimal design for low fundamental frequency and high acoustic output. The resulting design is then implemented and evaluated by experimentation.

This paper uses the mathematical software Maple for the auxiliary tool to study two types of integrals. We can obtain the infinite series forms of these two types of integrals by using binomial series and integration term by term theorem. On the other hand, we provide some examples to do calculation practically. The research methods adopted in this study involved finding solutions through manual calculations and verifying these solutions by using Maple. This type of research method not only allows the discovery of calculation errors, but also helps modify the original directions of thinking from manual and Maple calculations. For this reason, Maple provides insights and guidance regarding problem-solving methods.

This paper uses the mathematical software Maple for the auxiliary tool to study the partial differential problem of four types of multivariable functions.We can obtain the infinite series forms of any order partial derivatives of these four types of multivariable functions by using differentiation term by term theorem, and hence greatly reduce the difficulty of calculating their higher order partial derivative values.On the other hand, we propose some examples to do calculation practically.The research methods adopted in this study involved finding solutions through manual calculations and verifying these solutions by using Maple.This type of research method not only allows the discovery of calculation errors, but also helps modify the original directions of thinking from manual and Maple calculations.For this reason, Maple provides insights and guidance regarding problem-solving methods.