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381.
382.
Youngjung Geum Jiyoung Kim Changho Son Yongtae Park 《Journal of Engineering and Technology Management》2013,30(3):309-325
Today, innovation is no longer viewed as taking place within a single firm – but opening up the innovation process is still not a simple task. In open innovation, the mechanisms of incorporating external resources into the development process need to be carefully managed. This paper suggests a dual technology roadmap (TRM) that considers both internal and external firms. First, we introduce the concept of a dual TRM that considers partner resources as well as internal resources. Second, we suggest the structure of a dual TRM that uses dual planning objects. Third, three types of dual TRM are suggested, with three case examples. 相似文献
383.
This study used a content analysis of Apple's lawsuit concerning hearing loss, exploring how for-profit organizations manage health-related crises when products are suspected of having a potentially devastating impact on consumers’ health. By integrating two major approaches in a crisis communication, this study found that severity of damage, locus of control, business size, and the external public's claim were major contingent factors generating the organization's responsibility for consumer health crises. 相似文献
384.
We propose a nonparametric test for diagnosis of the proportionality assumption between hazard functions based on a functional
equation. Because of involvement of censoring distribution, we consider the test procedure in an asymptotic manner and obtain
the asymptotic normality for the proposed test statistic. Then we discuss the rationale of use of the functional equation
for the initial effect model. Finally we compare our test with others using an example. 相似文献
385.
Trevor Park 《Journal of applied statistics》2007,34(7):767-777
The penalized likelihood principal component method of Park (2005) offers flexibility in the choice of the penalty function. This flexibility allows the method to be tailored to enhance interpretation in special cases. Of particular interest is a penalty function in the style of the Lasso that can be used to produce exactly zero loadings. Also of interest is a penalty function for cases in which interpretability is best represented by alignment with orthogonal subspaces, rather than with axis directions. In each case, a data example is presented. 相似文献
386.
Recently, Cook and Weisberg (1989) presented dynamic graphics for regression diagnostics. They suggested animating graphics which could aid to understanding the effects of adding a variable to a model. In this paper, using the Cook and Weisberg's idea of animation, we propose a dynamic graphical method for residuals to display the effects of removing an observation from a model. Based on the information obtained from these animating graphics, it is possible to see the influence of observations for regression diagnostics. 相似文献
387.
Suppose particles are randomly distributed in a certain medium, powder or liquid, which is conceptually divided into N cells. Let pi denote the probability that a particle falls in the ith cell and Yi denote the number of particles in the ith cell. Assume that the joint probability function of the Yi follows a multinomial distribution with cell probabilities pi respectively. Take n (≤N) cells at random without replacement and put each of the cells separately through a mixing mechanism of dilution and swirl. These n cells constitute the first stage samples and the number of particles in these cells are not observable. Now conceptually divide each of n cells into M subcells of equal size and let Xij denote the number of particles in the jth subcell of the ith cell selected in the first stage; i=1,2,…,N and j=1,2,…,M. Consequently assume that the conditional joint probability function of the Xij given Yi=yi follows a multinomial distribution with equal cell probabilities. Now take m (≤M) subcells at random from each of the cells selected in the first stage sample. Assume that the numbers of particles in M×N subcells are observable. The properties of the estimator of the particle density per sample unit are investigated under the modified two-stage cluster sampling method. A laboratory experiment for Xanthan Gum Products is analyzed in order to examine the appropriateness of the model assumed in this paper. 相似文献
388.
Regression functions may have a change or discontinuity point in the ν th derivative function at an unknown location. This paper considers a method of estimating the location and the jump size of the change point based on the local polynomial fits with one‐sided kernels when the design points are random. It shows that the estimator of the location of the change point achieves the rate n?1/(2ν+1) when ν is even. On the other hand, when ν is odd, it converges faster than the rate n?1/(2ν+1) due to a property of one‐sided kernels. Computer simulation demonstrates the improved performance of the method over the existing ones. 相似文献
389.
Nansook Park E. Scott Huebner James E. Laughlin Robert F. Valois Rich Gilman 《Social indicators research》2004,66(1-2):61-79
The factorial invariance of theMultidimensional Students' Life SatisfactionScale (MSLSS: Huebner, 1994) across twodivergent cultures (collectivistic vs.individualistic) was investigated with 835Korean and 822 US students in elementary,middle, and high schools. Psychometricproperties of the Korean version of the MSLSSwere acceptable. A series ofmultisample-confirmatory factor analyses (MCFA)demonstrated the cross-cultural similarity ofthe five-factor model for students' lifesatisfaction. The similar structure of MSLSSacross cultural groups provides the basis formeaningful international comparisons of lifesatisfaction among children and adolescents. Further cross-cultural research includingvarious culturally sensitive life satisfactiondomains may enhance understanding of culturaldifferences in the structure, correlates, andconsequences related to students' lifesatisfaction. 相似文献
390.