The magnetocaloric effect (MCE), which is the reversible temperature change of magnetic materials due to an applied magnetic field, occurs largely in the vicinity of the magnetic phase transition temperature. This phenomenon can be used to induce magnetic refrigeration, a viable, energy-efficient solid-state cooling technology. Recently, Metal-organic frameworks (MOFs), due to their structural diversity of tunable crystalline pore structure and chemical functionality, have been studied as good candidates for magnetic refrigeration materials in the cryogenic region. In cryogenic cooling applications, MCE using MOF can have great potential, and is even considered comparable to conventional lanthanum alloys and magnetic nanoparticles. Owing to the presence of large internal pores, however, MOF also exhibits the drawback of low magnetic density. To overcome this problem, therefore, recent reports in literature that achieve high magnetic entropy change using a dense structure formation and ligand tuning are introduced.

In most RPG games, gameplay tends to be monotonous due to fixed character skills. This paper proposes a RPG game implementation technique which allows players' skill customization for their own gameplay. Players are allowed to customize their preferred game skills at the beginning of gameplay. We also propose a technique to guarantee game balancing by prohibiting certain skills from dominating gameplay. We implemented the proposed skill customization method together with a simple RPG game testbed. We tested a variety of player-defined skills and confirmed the method provides good game balancing during gameplay. Due to the voluntary and impromptu skill customization, a wide variety of strategy is possible even at the single game stage, which reduces boredom at the repetitive gameplay.