Hong Kong Polytechnic University

About: Hong Kong Polytechnic University is a education organization based out in Hong Kong, China. It is known for research contribution in the topics: Computer science & Tourism. The organization has 29633 authors who have published 72136 publications receiving 1956312 citations. The organization is also known as: HKPU & PolyU.

Application of the Manakov-PMD equation to studies of signal propagation in optical fibers with randomly varying birefringence

Abstract: We report on our investigations of the Manakov-polarization mode dispersion (PMD) equation which can be used to model both nonreturn-to-zero (NRZ) and soliton signal propagation in optical fibers with randomly varying birefringence We review the derivation of the Manakov-PMD equation from the coupled nonlinear Schrodinger equation, and we discuss the physical meaning of its terms We discuss our numerical approach for solving this equation, and we apply this approach to both NRZ and soliton propagation, We show by comparison with the coupled nonlinear Schrodinger equation, integrated with steps that are short enough to follow the detailed polarization evolution, that our approach is orders of magnitude faster with no loss of accuracy Finally, we compare our approach to the widely used coarse-step method and demonstrate that the coarse-step method is both efficient and valid

One hundred years of employee turnover theory and research.

Abstract: We review seminal publications on employee turnover during the 100-year existence of the Journal of Applied Psychology. Along with classic articles from this journal, we expand our review to include other publications that yielded key theoretical and methodological contributions to the turnover literature. We first describe how the earliest papers examined practical methods for turnover reduction or control and then explain how theory development and testing began in the mid-20th century and dominated the academic literature until the turn of the century. We then track 21st century interest in the psychology of staying (rather than leaving) and attitudinal trajectories in predicting turnover. Finally, we discuss the rising scholarship on collective turnover given the centrality of human capital flight to practitioners and to the field of human resource management strategy. (PsycINFO Database Record

Trading Performance, Disposition Effect, Overconfidence, Representativeness Bias, and Experience of Emerging Market Investors

Abstract: Using brokerage account data from China, we study investment decision making in an emerging market. We find that Chinese investors make poor trading decisions: the stocks they purchase underperform those they sell. We also find that Chinese investors suffer from three behavioral biases: (i) they tend to sell stocks that have appreciated in price, but not those that have depreciated in price, consistent with a disposition effect, acknowledging gains but not losses; (ii) they seem overconfident; and (iii) they appear to believe that past returns are indicative of future returns (a representativeness bias). In comparisons to prior findings, Chinese investors seem more overconfident than U.S. investors (i.e., the Chinese hold fewer stocks, yet trade very often) and their disposition effect appears stronger. Finally, we categorize Chinese investors based on proxy measures of experience and find that "experienced" investors are not always less prone to behavioral biases than are "inexperienced" ones.

Guanxi, Trust, and Long-Term Orientation in Chinese Business Markets

Abstract: This research focuses on buying firms' trust in a supplier's salesperson and posits that this type of trust is determined by characteristics of the salesperson, the interpersonal relationships between a salesperson and the buying firm's boundary personnel, and characteristics of personal interactions between these two parties. More important, the authors discuss the concept of interpersonal relationships in the context of Chinese culture and model it as a three-dimensional latent construct, which, in some literature, is called guanxi. A key aspect of this research is that the authors investigate the impact of each dimension of guanxi on salesperson trust separately. Moreover, the authors consider the buying firm's trust in the supplying firm and its long-term orientation toward the supplier the consequences of salesperson trust. To test the model, the authors use data collected from 128 buying organizations in Hong Kong. The sampled firms are from both the government and private sectors.