In recent times, international comparative studies on managers’ beliefs regarding ethical/unethical leadership have increased in number. These studies focus on both Eastern and Western countries. However, although these previous studies focused on the effects of national culture, they did not pay sufficient attention to the effects of institutions. Moreover, these studies covered only a few countries. Despite Japan’s strong influence on the world economy, it has not been included in previous studies on ethical leadership. Thus, to reveal unexplored factors—particularly cultural (...) and institutional factors—and to determine the generalizability of previous findings, this study used a qualitative research method to examine Japanese business managers’ beliefs about ethical/unethical leadership. The data revealed the convergence and divergence in beliefs regarding ethical/unethical leadership between managers in Japan and in other countries. The analysis identified mostly the same themes of ethical/unethical leadership as found in other countries albeit with different distributions. In addition, We identified new themes that may be specific to Japan or that were neglected in previous studies. Moreover, this study suggests the necessity of considering each society’s history of business ethics and current ethics-related institutional contexts in ethical/unethical leadership studies. (shrink)

Previous empirical studies have shown that perceptions of organizational politics are negatively related to individuals’ affective commitment. The key contribution of this study was that it found the interactive moderating effects of political skill and quality of leader–member exchange (LMX) on the relationship between perceptions of organizational politics and affective commitment. Our results indicated that politics perception affective commitment relationship was weaker when both political skill and quality of LMX are high. When only political skill is high and the quality (...) of LMX is low, or LMX quality is high but political skill is low, the negative relationship between politics perception and affective commitment was not mitigated. Limitations and implications for future research are discussed. (shrink)

Recently, some studies revealed that transcranial direct current stimulation reduces dual-task interference. Since there are countless combinations of dual-tasks, it remains unclear whether stable effects by tDCS can be observed on dual-task interference. An aim of the present study was to investigate whether the effects of tDCS on dual-task interference change depend on the dual-task content. We adopted two combinations of dual-tasks, i.e., a word task while performing a tandem task and a classic Stroop task while performing a tandem task. (...) We expected that the Stroop task would recruit the dorsolateral prefrontal cortex and require involvement of executive function to greater extent than the word task. Subsequently, we hypothesized that anodal tDCS over the DLPFC would improve executive function and result in more effective reduction of dual-task interference in the Stroop-tandem dual-task than in the word-tandem dual-task. Anodal or cathodal tDCS was applied over the DLPFC or the supplementary motor area using a constant current of 2.0 mA for 20 min. According to our results, dual-task interference and the task performances of each task under the single-task condition were not changed after applying any settings of tDCS. However, anodal tDCS over the left DLPFC significantly improved the word task performance immediately after tDCS under the dual-task condition. Our findings suggested that the effect of anodal tDCS over the left DLPFC varies on the task performance under the dual-task condition was changed depending on the dual-task content. (shrink)

The mental fatigue elicited by working and studying consumed mental resources, thereby eliciting a declined performance and an increased mental stress. The long-term continuous work and study, which is typical for modern workers and students, can increase mental fatigue and health risks. Previous studies reported that the natural environment has a restorative of mental resources and reducing stress. However, it is difficult for urban workers and students to take sufficient breaks in real natural environment. We conducted an experiment to examine (...) whether brief and indirect exposure to the natural environment elicits a restorative of attention and reducing stress. Twenty-five undergraduate and graduate students from the university of modern city participated in the experiment. The experiment involved measuring the changes in the task performance of the participants and the subjective mental workload, while the attention restoration was indexed from physiological response over time. The participants had two types of resting periods in the middle of the task, i.e., by looking at a blank display or by watching a nature video having scenes of, e.g., a forest, small waterfall, and rustling leaves. The results indicate that the natural environment indirectly depicted through the nature videos does not affect the task performance and the subjective mental workload but decreases the SCL. The results of the physiological response suggest that having rest periods depicting the natural environment, even if indirectly and briefly, can restore the directed attention for the task. This experiment revealed a useful method of resting for urban workers and students to restore their attention to a task. (shrink)

The Bose-Einstein condensation of free relativistic particles [ε=(M 2 c 4 +c 2 p 2 ) 1/2 −Mc 2 ] is studied rigorously. For massless bosons (ε=cp), the condensation transition of third (second) order occurs in2 (3) dimensions (D). The molar heat capacity follows the T 2 (T 3 ) law below the condensation temperature Tc [k B Tc=(2πħ 2 c 2 n/1.645) 1/2 [(π 2 ħ 3 c 3 n/1.202) 1/3 ], reaches4.38 (10.8) R at T=Tc, and approaches the (...) high-temperature-limit value2 (3) R with no jump (a jump equal to6.75R) in2 (3)D. For finite-mass (M) bosons, the phase transition occurs only in3D with the condensation temperature Tc always smaller than that of the corresponding nonrelativistic bosons [ε=(2M) −1 p 2 ]. If the mass M is reduced to zero, the condensation temperature Tc grows monotonically and reaches eventually that of massless relativistic bosons. This mass-dependence of Tc is therefore distinct from the case of nonrelativistic bosons, where Tc grows to infinity as M →0. A brief discussion is given for a possible connection with the normal-to-super transition of the independently moving Cooper pairs (bosons). (shrink)