In order for computer generated imagery to recreate the characteristic visual appearance of phenomena such as smoke and fog it is necessary to compute the way in which light interacts with participating media. In this work we present a novel technique for computing volumetric single scattering lighting solutions for particle-based inhomogeneous participating media data sets. We seek to calculate volumetric lighting solutions for particle-based data sets as such data sets have the advantage of being spatially unbounded and relatively unrestricted with regard to memory as compared to uniform grids. In order to perform the calculations which are required for computing such a lighting solution, we introduce a novel octree based data structure. We refer to this new data structure as a density octree. The design of the density octree allows for efficiently computing light attenuation throughout the spatial extent. Using our data structure, we are able to produce high quality output imagery of arbitrary particle data sets in the presence of arbitrary numbers of lights.
This survey study of senior municipal administrators examines the use of evaluative criteria in managerial performance evaluation and extends previous findings in the public sector context. The results reveal that the use of evaluative criteria is very similar to that found in Otley and Pollanen's (2000) public-sector study, but significantly different from those reported in several private-sector studies. Substantially lower proportions of budget-based criteria are found in both public-sector studies than in private-sector studies. Performance is higher under low- than high-uncertainty conditions and in larger than smaller organizations. The findings suggest that different evaluative criteria may be appropriate in the public and he findings suggest that different evaluative criteria may be appropriate in the public and private sectors, and that uncertainty and organizational size may affect performance.
Partial least squares (PLS) is sometimes used as an alternative to covariance-based structural equation modeling (SEM). This paper briefly reviews currently available SEM techniques, and provides a critique of the perceived advantages of PLS over covariance-based SEM as commonly cited by PLS users. Specific attention is drawn to the primary disadvantage of PLS, namely the lack of consistency of its parameter estimates. The instrumental variables (IV) /two stage least squares (2SLS) method of estimation is then described and presented as a potential alternative to PLS that might yield its perceived advantages without succumbing to its primary disadvantage. Preliminary simulation results show that: PLS parameter estimates exhibit substantial bias when the number of items is moderate; SEM-based methods yield lower bias; and IV/2SLS estimates may indeed provide a viable ordinary least squares (OLS)-based alternative to PLS.
A study of citations in four prominent journals indicates how deeply Hofstede's conceptualization dominates the understanding of culture in international business research. The implications of this intellectual hegemony for the development of the field are examined After considering some critiques of Hofstede's approach, three diverse alternatives to the value-based approach are discussed.
This paper provides a critical review of literature on management controls and their context. The review indicates that more emphasis has been placed on organizational than environmental factors and that the effectiveness of different controls in different contexts remains practically unaddressed. In general, research has been ad hoc and focused on results-oriented financial controls, short-term efficiency, and individual level of analysis. Even for commonly studied topics (e.g., budget controls), evidence has often been inconsistent and limited to manufacturing organizations, with little integration and refinement of previous theoretical models based on new evidence. Further research is required to investigate the relative importance of different financial and nonfinancial controls in different types of organizations in order to develop more comprehensive performance measurement and management frameworks.
Potential synergies between international trade and tourism are viewed optimistically by governments, yet research to assess their association is limited. To gain an understanding of trade and tourism relationships, this paper reports on a study which examines both product-related and tourism-related place image effects on consumer behavior simultaneously. Using the U.S. as the country of focus, key product and travel relationships are measured by structural equation modeling of consumer data from South Korea. Findings support the cross-over effect between one's beliefs about a country as a destination and as a producer, and one's willingness to travel to it and/or buy its products, and most strongly, that product beliefs affect views of travel destinations.
Information technology-based alliances are rapidly spreading in organizations, which calls upon researchers to develop an adequate theoretical lens to examine this phenomenon and its key associated outcomes, such as the business performance of alliance firms. However, strategic alliances are mostly examined from a transaction cost economics perspective, and the results on performance are inconclusive at best. This paper proposes an alternative lens - the resource-based view - and applies an extended version of it to explain the performance of firms in IT-based alliances. A conceptual model is developed that examines the impact of shared information technology resources on firm performance. Also, a measurement scale for these resources is developed and preliminarily validated.
Social problems, such unsustainable development, can be too large for any one organization to tackle alone so are increasingly being addressed through cross-sector multi-organizational collaborations. One of the approaches being taken is formulating and implementing a collective (alternatively named collaborative) strategy. Despite the increasing usage of collaborative strategic management in practice, there is relatively little literature on this approach, particularly when considering the implementation of the collaborative strategy. This paper builds on existing interorganizational collaboration theory and organizational strategy implementation theory to determine: 1) a conceptual process model of collaborative strategic management; and 2) factors which affect each phase of cross-sectoral social-oriented collaborative strategic managment.
Working in collaborative and dispersed (C&D) settings is now common for project teams, especially for those active in multinational companies or in international contexts. The concept of "collaborative maturity" has recently been proposed by various authors in order to identify and measure the competence of a firm working in C&D mode. Many models of collaborative maturity have been proposed, reflecting the increasing importance of this area of research. However, the existing literature is spread among multiple journals in various fields of research. For a better understanding of collaborative maturity and how it is measured, a thorough literature review is conducted and an extension of existing research is proposed. This will serve as the theoretical background for future empirical research. The results should be useful for project managers and academicians with an interest in C&D projects.
Despite the prevalence of formal and informal standards for employee attire, research on its role is limited. Social psychological theories suggest that work attire can be a meaningful, expressive symbol associated with one's occupational identity. Organizational theories suggest that work attire can affect both individual and organizational outcomes. Bridging these perspectives, this study considers work attire's potential to influence micro and macro organizational dynamics. A framework of the dimensions influencing factors and outcomes of work dress is used to assess the results of a poll of members of the Canadian Forces, an organization whose work attire is highly conspicuous and rigidly homogeneous. Though a slight majority of participants responded that their uniform did not impact their operational focus, comments indicate both organizational influences and individual concerns with specific attributes of attire. Attitudes toward work attire may be indicative of broader issues of organizational identity.