This paper focuses on modeling and control of a class of serial variable stiffness actuators based on level mechanisms for robotic applications. A multi-input multi-output complex nonlinear dynamic model is derived to fully describe SVSAs and the relative degree of the model is determined accordingly. Due to nonlinearity, high coupling, and parametric uncertainty of SVSAs, a neural network-based adaptive control strategy based on feedback linearization is proposed to handle system uncertainties. The feasibility of the proposed approach for position and stiffness (...) tracking of SVSAs is verified by simulation results. (shrink)

Driven by the cognitive-neoassociationistic model of aggression, this study examines how supervisors’ negative affect at work influences their interaction with subordinates, which further affects subordinate outcomes. Drawing upon research on power/resource interdependence and victim precipitation theory, we also test whether the positive relationship between supervisors’ negative affect and abusive supervision is moderated by leader–member exchange. Using one hundred and eighty supervisor–subordinate dyads from five hotels, we found that, supervisors’ negative affect at work was positively related to abusive supervision, LMX buffered (...) the positive association between supervisors’ negative affect and abusive supervision, and the indirect effects of supervisors’ negative affect on subordinate outcomes via abusive supervision was buffered by LMX, such that the indirect effects were only found in dyads with lower LMX, but not in dyads with higher LMX. Theoretical contributions and practical implications for managers and organizations were also discussed. (shrink)

This study conducted a cross-sectional investigation of facial appearance dissatisfaction between patients before undergoing orthognathic surgery and a non-surgical sample to evaluate the potential influencing factors of facial appearance dissatisfaction. A sample of 354 participants completed a set of questionnaires concerning facial appearance dissatisfaction, interpersonal pressure, media pressure, and fear of negative appearance evaluation (112 patients, 242 controls). The patients reported higher facial appearance dissatisfaction, more media pressure, more interpersonal pressure, and a greater fear of negative appearance evaluation among others (...) than the control group. Moreover, regression analyses identified interpersonal pressure and fear of negative appearance evaluation as the main influencing factors on facial appearance dissatisfaction whether in the orthognathic patients or in the control groups. The associations between the perceptions of interpersonal pressure, fear of negative appearance evaluation, and facial appearance dissatisfaction support the possible utility of strengthening social experiences and psychological intervention in preventing and treating these appearance-concerns, especially for the orthognathic patients. (shrink)

Corporate social responsibility has generally been recognized as corporate pro-social behavior aimed at remediating social issues external to organizations, while political CSR has acknowledged the political nature of such activity beyond social aims. Despite the growth of this literature, there is still little attention given to gender as the starting point for a conversation on CSR, ethics, and the Global South. Deploying critical insights from feminist work in postcolonial traditions, I outline how MNCs replicate gendered neocolonialist discourses and perpetuate exploitative (...) material dependences between Global North/south through CSR activities. Specifically, I address issues of neocolonial relations, subaltern agency, and ethics in the context of gendered global division of labor through the exemplar of Rana Plaza and its aftermath. In all, I offer new directions for CSR scholarship by attending to the intersections of gender, ethics, and responsibility as they relate to corporate actions in the Global South. (shrink)

This study extended the research on the relationship between youth elite athletes’ satisfaction and coaches’ paternalistic leadership by identifying athletes’ resilience as a moderator. A total of 221 youth elite football players aged 13–19 years old who are students of a Chinese professional football boarding school participated in a questionnaire survey. The study found no correlation between the three dimensions of coaches’ paternalistic leadership and the youth athletes’ satisfaction. The results also showed that the interaction of resilience and moral leadership (...) affects the youth elite athletes’ satisfaction, whereas resilience does not play a moderating role in the relationship between authoritative leadership or benevolent leadership and satisfaction. As the results of the study are different from those of other scholars, they may reveal the uniqueness of youth elite football players in boarding schools. This study further analyzed the possible reasons for this result and prospected the theoretical and practical implications of these findings. Based on the conclusion, the study recommended that youth elite football schools should pay attention to the results of scientific research in leadership styles and apply them to practice in the future. (shrink)

This paper provides an experimental test of stochastic choice models of decisions. Models that admit Fechnerian structure are tested through the repeated pairwise choice problems. Results refute the Fechner hypothesis that characterizing the probability of selecting a given prospect increases in how strongly it is preferred to alternative choices. However, the experimental data lend support to characterizing an individual’s binary choice probability as some scalable functions of the von Neumann–Morgenstern utilities in the risky context.

InDialectic of Enlightenment Max Horkheimer and Theodor Adorno argue that reason, which claims to lead to truth, is always instrumental reason—a form of domination based on violence. Enlightenment, which aspired to emancipate society from the violence of myth, ends by reenacting this violence and turning back into myth.2 Jürgen Habermas attacks this argument for falling prey to an unbridled scepticism that fails to appreciate the achievements of modernity.3 For him, Horkheimer's and Adorno's radical critique of reason is analogous to Nietzsche's (...) critique of science and morals in On the Genealogy of Morality to the extent that a claim to truth…. (shrink)

Our study offers a linguistic–pragmatic examination of instances of bystander intervention, a social action that takes place when a bystander or a group of bystanders intervenes when a wrongdoer abuses a victim or behaves outside socially acceptable norms. We approach this social phenomenon by analyzing data drawn from a database of 11 video-recordings that all involve naturally occurring interactions in public settings in China. The notion of intervention discourse is tentatively introduced in this study to distinguish it from those used (...) to achieve other communicative purposes and to disclose some recurrent patterns of language use in bystander intervention. The data analysis summarizes six categories of intervention discourse along the continuum of strong to weak intervention: terminating, consequence-stating, advising, judging, appealing and stance-taking. Our study demonstrates that the skillful exercise of deontic authority embodied in intervention discourse might have a tangible influence on the outcome of the intervention. (shrink)

Writings on Hindu cosmology and science.

This study explores the role of metapragmatic expressions as pragmatic manipulation in a media context, with data drawn from a Chinese TV panel discussion program Tiger Talk. It argues that the program host selects MPEs to manipulate the ongoing interactions, in order to solve or prevent the actual or potential problems in the interactions. Hence, the functioning of MPEs is described as a process consisting of three stages: problem awareness, pragmatic manipulation, and problem resolution or prevention. It is found that (...) the host mainly uses five types of MPEs, i.e. performatives, commentaries, evidentials, message glosses, and stance displayers for the sake of pragmatic manipulation across the three dimensions of interactive procedure control, rapport management, and impact monitoring. The article concludes that the host’s pragmatic manipulation of the ongoing interactions, driven by both institutional and interpersonal concerns, is motivated by his institutional rights and obligations as a program manager. (shrink)

This paper studies the fixed-time trajectory tracking control problem of robot manipulators in the presence of uncertain dynamics and external disturbances. First, a novel nonsingular fixed-time sliding mode surface is presented, which can ensure that the convergence time of the suggested surface is bounded regardless of the initial states. Subsequently, a novel fast nonsingular fixed-time sliding mode control is developed so that the closed-loop system is fixed-time convergent to the equilibrium. By applying the proposed NFNFSMC method and the adaptive technique, (...) a novel adaptive nonsingular fixed-time control scheme is proposed, which can guarantee fast fixed-time convergence of the tracking errors to small regions around the origin. With the proposed control method, the lumped disturbance is compensated by the adaptive technique, whose prior information about the upper bound is not needed. The fixed-time stability of the trajectory tracking control under the proposed controller is proved by the Lyapunov stability theory. Finally, corresponding simulations are given to illustrate the validity and superiority of the proposed control approach. (shrink)

Considering three monetary policy rules, together with two endogenous macroprudential policies that are credit constraints for households and counter-cyclical capital for bankers, this paper establishes a dynamic stochastic general equilibrium model. Based on the welfare analysis of different combinations of macroprudential rules and monetary policy rules, this paper identifies the optimal policy combinations and analyzes the coordination effects between macroprudential policies and monetary policies. The results show that no matter what kind of monetary policy rules is implemented, the introduction of (...) macroprudential rules has improved the level of total social welfare. In the optimal “two pillars” framework of monetary policies and macroprudential rules, the main objective of monetary policy is to stabilize price inflation, and the macroprudential policy to be implemented is the CRR macroprudential policy. This combination can effectively promote the stability of the real estate market, financial market, and macroeconomy, while maximizing the improvement of total social welfare. (shrink)

Individualism and nationalism are often held to be competing or even mutually exclusive concepts. Hannah Arendt, for instance, in The Origins of Totalitarianism, argues that a focus on the rights of the individual could have provided an antidote to the kind of racist nationalism established by the Nazis.1 According to this logic, the more firmly individual rights are defended, the less dangerously nationalist the resulting society will be, because individuals' goals and desires will not be subordinated to those of a (...) larger group. Studies of the work of Ernst Jünger have confirmed this assessment of the importance of the individual.. (shrink)

潘知常(1956~ ),湖南醴陵人,南京大学企业形象研究中心主任、教授,中国文艺理论学会理事,中华美学学会青年学术委员会副主任.