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Lorentz violation is a candidate quantum-gravity signal, and the Standard-Model Extension (SME) is a widely used parametrization of such a violation. In the gravitational SME sector, there is an elusive coefficient for which no effects have been found. This is known as the $t$ puzzle and, to date, it has no compelling explanation. This paper analyzes whether there is a fundamental explanation for the $t$ puzzle. To tackle this question, several approaches are followed. Mainly, redefinitions of the dynamical fields are studied, showing that other SME coefficients can be moved to nongravitational sectors. It is also found that the gravity SME sector can be consistently treated \textit{\`a la} Palatini, and that, in the presence of spacetime boundaries, it is possible to correct its action to get the desired equations of motion. Moreover, through a reformulation as a Lanczos-type tensor, some problematic features of the $t$ term, which should arise at the phenomenological level, are revealed. The most important conclusion of the paper is that there is no evidence of a fundamental explanation for the $t$ puzzle, suggesting that it may be linked to the approximations taken at the phenomenological level.

Although the insight used to solve a problem seems to emerge unexpectedly, a previous empirical study has shown that insight emerges after people recognize their failure via social comparisons regarding problem-solving outcomes. This study was intended to confirm this conclusion and advance knowledge in this domain. Experiment 1 demonstrated that insight was more strongly influenced by information about the performances of more, rather than fewer, others, which is consistent with the notion of a social impact. Furthermore, the present study demonstrated that this influence cannot be explained by socially-modulated manual speed (Experiment 2). These results suggest that insight can be robustly and universally manipulated by social reality.

Recent results from BRAHMS show the persistence of high \(p_{\rm T}\) suppression in Au + Au and d + Au collisions at forward rapidity. These observations have implications for Parton Energy Loss and Color Glass Condensate models. We encourage - and challenge - theorists to develop a unified description of the high \(p_{\rm T}\) suppression as it is observed in energetic heavy ion collisions at RHIC across a wide rapidity range.

Recently, new interactive devices such as hap tic devices became available for game development. 6DOF hap tic devices give the user an opportunity "to feel" the simulated virtual environment in the way similar to the real world. Hap tic-based interaction can add a new dimension to "serious games" development. The user can "feel" objects surfaces and complex objects interaction forces in a 3D virtual environment. In this paper, we propose two hap tic-based serious games. In the first "T Puzzle" game, the user can "feel" the weight of objects, rotate and move the 3D puzzle pieces in the virtual world. This game can be used to improve the user's spatial abilities. In the second "Mol Docking" game, the player can feel interaction forces between molecular systems and learn the process of molecular docking in collaborative virtual environment.