Role-Based Access Control: A Multi-Dimensional View p. 54 Panel: Reexamining Assurance p. 64 Plenary Panel: Secure System Composition p. 66 Secure System Composition: Five Practical Initiatives p. 67 Architectural Impact on Performance of a Multilevel Database System p. 76 Benchmarking Multilevel Secure Database Systems Using the MITRE Benchmark p. 86 Organizing MLS Databases from a Data Modeli...

Multilevel analysis often leads to modeling with multiple latent variables on several levels. While this is less of a problem with Gaussian observed variables, maximum-likelihood (ML) estimation with categorical outcomes presents computational problems due to multidimensional numerical integration. We describe a new method that compared to ML is both computationally efficient and has similar MS...

Workkow management systems (WFMS) support the modeling and coordinated execution of processes within an organization. As advances in workkow management take place, they are also required to support security. This paper makes two major contributions to the area of workkow management. First, it shows how both mandatory and discretionary security can be incorporated into WFMS. Second, it provides ...

Rates of schizophrenia differ significantly between groups defined at the social level, eg, urban/rural comparisons, neighborhoods, and ethnic minority status. While earlier studies were not able to determine if the social environment influenced the development of schizophrenia (causation) or whether individuals at risk aggregated in adverse social environments (selection), the recent developme...

A very general class of multilevel factor analysis and structural equation models is proposed which are derived from considering the concatenation of a series of building blocks that use sets of factor structures defined within the levels of a multilevel model. An MCMC estimation algorithm is proposed for this structure to produce parameter chains for point and interval estimates. We show how t...

Multilevel inverter technology has emerged recently as a very important alternative in the area of high-power medium-voltage energy control. This paper presents modeling and simulation of a single phase simplified eleven-level inverter (SELl). Multilevel inverter offers high power capability. Its performance is highly superior to that of conventional two-level inverter due to reduced harmonic d...

Emergence of systems biology motivated more comprehensive and integrative approaches for modeling physiological processes. Presented study proposes a software framework to integrate multilevel and multiscale models for physiological processes. The aim of the study is to provide the interfacing mechanisms to facilitate the integration of models from multiple research groups increasing the abilit...

Meuleman and Billiet (2009) have carried out a simulation study aimed at the question how many countries are needed for accurate multilevel SEM estimation in comparative studies. The authors concluded that a sample of 50 to 100 countries is needed for accurate estimation. Recently, Bayesian estimation methods have been introduced in structural equation modeling which should work well with much ...

This tutorial presents an overview of multilevel or hierarchical data modelling and its applications in medicine. A description of the basic model for nested data is given and it is shown how this can be extended to t exible models for repeated measures data and more complex structures involving cross-classi cations and multiple membership patterns within the software package MLwiN. A variety o...

Emergent leaders within groups have been witness in leadership research after bulk of formal or established leader research. Without formal organizational authority or power, how emergent leadership influences group members under such situation? Emotional recovery and emotional threshold, the two dimensions of a new construct of emotional stability (Li, 2005), were used to predict emergent lead...