Rough set-based approach to feature selection in customer relationship management

In this paper, application of the rough set theory (RST) to feature selection in customer relationship management (CRM) is introduced. Compared to other methods, the RST approach has the advantage of combining both qualitative and quantitative information in the decision analysis, which is extremely important for CRM. To derive the decision rules from historical data for identifying features that contribute to CRM, both the mathematical formulation and the heuristic algorithm are developed in this paper. The proposed algorithm is comprised of both equal and unequal weight cases of the feature content with the limitation of the mathematical models. This algorithm is able to derive the rules and identify the most significant features simultaneously, which is unique and useful in solving CRM problems. A case study of a video game system purchase is validated by historical data, and the results showed the practical viability of the RST approach for predicting customer purchasing behavior. This paper forms the basis for solving many other similar problems that occur in the service industry.     

From "Us" to "Them": Diasporic Linkages and Identity Politics

Global diasporas-a type of social formation mediating economic, political, and cultural affairs across borders-have been a focus of globalization researchers for some time. However, up to now, little knowledge exists on how social identification affects business participation in diaspora communities and how such participation modifies social identification. This article, based on empirical research on diasporic linkages between Taiwanese transnationals and ethnic Chinese overseas, serves to illustrate a) how globalization has enhanced the practical and economic roles of diasporas, and b) how economic practices and ethnic identification interact within diasporic communities. The author argues that ethnic membership still remains contested, despite diasporas serving as flexible forms of social organization in the mediation of capital flow.     

Some locally optimal subset selection rules for comparison with a control

Let π₀,π₁,…,π_k be k+1 independent populations. For i=0,1,…,k,π_i has the densit f(x,θ_i), where the (unknown) parameter θ_i belongs to an interval of the real line. Our goal is to select from π₁,… π_k (experimental treatments) those populations, if any, that are better (suitably defined) than π₀ which is the control population. A locally optimal rule is derived in the class of rules for which Pr(π_i is selected)γ_i, i=1,…,k, when θ₀=θ₁=?=θ_k. The criterion used for local optimality amounts to maximizing the efficiency in a certain sense of the rule in picking out the superior populations for specific configurations of θ=(θ₀,…,θ_k) in a neighborhood of an equiparameter configuration. The general result is then applied to the following special cases: (a) normal means comparison — common known variance, (b) normal means comparison — common unknown variance, (c) gamma scale parameters comparison — known (unequal) shape parameters, and (d) comparison of regression slopes. In all these cases, the rule is obtained based on samples of unequal sizes.     

Supply chain management in the US and Taiwan: An empirical study

This study uses an empirical survey of middle-line managers in the US and Taiwan to study the association of supply chain management components and organizational performance. Through structural equation modeling, critical components of supply chain management are found to have considerable effects on organizational performance. The findings of the study are summarized as follows:

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Supply chain competencies have positive effects on organizational performance in both the US and Taiwan. Supply chain competencies are developed around quality and service, operations and distribution, and design effectiveness. The goal of supply chain competencies is to satisfy customer requirements.     

Towards next-generation visual archives: image,film and discourse

The digital turn in visual studies has played a major role in the terminological overlap between ‘archive’, ‘database’ and ‘corpus’, and it has brought about a number of positive developments such as improved accessibility and availability. At the same time, it has also raised important questions pertaining to the materiality, searchability, annotation and analysis of the data at hand. Through a series of theoretical constructs and empirical examples, this paper illustrates the necessity and benefits of interdisciplinary dialogue when tackling the multimodal corpus annotation challenge. The meaningful interrelations between semiotic modes, the combinations between manual and (semi)automated annotation, the seamless integration of coding and annotation schemes which share common logics and the contextual embedding of the presented analyses strongly suggest multimodal document analysis in all its forms will continuously benefit from a corpus-based approach.     

Acculturation and Post-Migration Stress in Middle-Aged Chinese Immigrant Women in Philadelphia: Variation between the Fujianese and the non-Fujianese women

The experience of acculturation in Chinese immigrant women from the rural coastal province of Fujian has not been well studied despite of their growing numbers in American cities. This exploratory study is an attempt to examine the experience of acculturation and post-migration stress in Fujianese immigrant women as compared to those from other parts of China. The study is based on a convenience sample 240 Fujianese and 162 non-Fujianese Chinese immigrant women living in Philadelphia.Results from bivariate analyses showed that the variation in demographic characteristics between Fujianese and non-Fujianese women was marginal; that all Chinese women in this study reported experiencing a unidimensional process of acculturation and a domain-generic model of acculturation; and that the Fujianese women showed a higher level of post-migration stress than the non-Fujianese women. In multiple regression controlling for demographic characteristics and including all the women in our sample, more acculturated women reported a higher level of post-migration stress. However, separate multiple regression analyses for Fujianese and non-Fujianese women revealed a different pattern of post-migration stress models. The findings suggest the importance of further research to understand acculturation and post-migration stress among Fujianese immigrant women.     

Whole-body vibration training improves balance control and sit-to-stand performance among middle-aged and older adults: a pilot randomized controlled trial

Background

Aging is associated with decreased balance, which increases falling risk. The objective of the current study was to determine the feasibility and effects of whole-body vibration (WBV) training on knee extensor muscle power, limits of stability, and sit-to-stand performance among community-dwelling middle-aged and older adults in the United States.

Methods

A randomized pilot study with participant blinding was conducted. Feasibility outcomes included recruitment and compliance rate. Twenty-nine community-dwelling older adults were randomly assigned to perform body-weight exercises with either an individualized vibration frequency and amplitude, a fixed vibration frequency and amplitude, or no vibration. Isokinetic knee extensor power, limits of stability, and sit-to-stand tests were conducted before beginning the exercises (baseline) and after 8 weeks of training.

Results

With a favorable recruitment rate (58%) and compliance rates (attrition 9%; adherence 85%), the intervention was deemed feasible. The limits of stability endpoint excursion score for the individualized frequency–amplitude group was increased by 8.8 (12.9%; P = 0.025) after training, and that group’s maximum excursion score was increased by 9.2 (11.5%; P = 0.006) after training. The average weight transfer time score was significantly decreased by 0.2 s in the fixed group. The participants in the individualized group demonstrated a significant increase (3.2%) in weight rising index score after 8 weeks of WBV training.

Conclusions

WBV training is feasible for use with elderly people, and this study achieved good recruitment and compliance. The present paper suggests that 8 weeks of WBV training improves limits of stability and sit-to-stand performance. Future studies must determine whether WBV training improves other factors that affect posture control.

Trial registration

This study was registered at the Texas Woman’s University Institutional Review Board [TWU IRB 17632] on the 3rd of November 2014.

     

Customer First and Customer Sexual Harassment: Some Evidence from the Taiwan Life Insurance Industry

Empirical research suggests that customer sexual harassment is a far more common problem than employee to employee harassment for female salespeople. However, to date, there has been relatively little research conducted on the problem of customer sexual harassment. Insurance salespeople sometimes need to meet customers outside the company, and customer sexual harassment problems may occur. Hence, by using Taiwan's life insurance industry as an example, this study explores three research questions: (1) When the idea of ‘customer first’ is fully recognized by insurance salespeople, does it make the salespeople more tolerant of customer sexual harassment problems? (2) When the idea of customer first is supported by the insurance company, will insurance salespeople expose customer sexual harassment problems? (3) Will insurance salespeople tend to be more tolerant of quid pro quo sexual harassment? A total of 223 full‐time and self‐employed insurance salespeople participated in and completed this study survey. The results showed that the company's attitude may significantly affect the respondents' intention to expose the customer sexual harassment, but the personal belief in ‘customer first’ may not affect the respondents' intention to expose the customer misconduct. Since the three research questions have been less studied in the literature, and customer sexual harassment problems could have serious effects on salespeople, we think the results of this empirical study may have some implications for researchers and practitioners.