Authorization algorithms for permission-role assignments

Permission-role assignments (PRA) is one important process in Role-based access control (RBAC) which has been proven to be a flexible and useful access model for information sharing in distributed collaborative environments. However, problems may arise during the procedures of PRA. Conflicting permissions may assign to one role, and as a result, the role with the permissions can derive unexpected access capabilities. This paper aims to analyze the problems during the procedures of permission-role assignments in distributed collaborative environments and to develop authorization allocation algorithms to address the problems within permission-role assignments. The algorithms are extended to the case of PRA with the mobility of permission-role relationship. Finally, comparisons with other related work are discussed to demonstrate the effective work of the paper

Linear Assignment Maps for Correlated System-Environment States

An assignment map is a mathematical operator that describes initial system-environment states for open quantum systems. We reexamine the notion of assignments, introduced by Pechukas, and show the conditions assignments can account for correlations between the system and the environment, concluding that assignment maps can be made linear at the expense of positivity or consistency is more reasonable. We study the role of other conditions, such as consistency and positivity of the map, and show the effects of relaxing these. Finally, we establish a connection between the violation of positivity of linear assignments and the no-broadcasting theorem.Comment: 6 pages, 1 tabl

Did language give us numbers? : Symbolic thinking and the emergence of systematic numerical cognition

What role does language play in the development of numerical cognition? In the present paper I argue that the evolution of symbolic thinking (as a basis for language) laid the grounds for the emergence of a systematic concept of number. This concept is grounded in the notion of an infinite sequence and encompasses number assignments that can focus on cardinal aspects ("three pencils"), ordinal aspects ("the third runner"), and even nominal aspects ("bus #3"). I show that these number assignments are based on a specific association of relational structures, and that it is the human language faculty that provides a cognitive paradigm for such an association, suggesting that language played a pivotal role in the evolution of systematic numerical cognition

Gyrus Higher Learning Management System

Our project was to develop a prototype learning management system for use of higher education for our sponsor, Gyrus Systems. This consisted of creating a MySQL relational database to store user and class information, to design and code a user interface that emphasized user experience, and to implement functionalities for each user role. Early in the design phase we outlined which features were must haves, in order to demonstrate an adequate prototype, and had this list approved by our sponsor. They were then divided into two roles. The role of “student” has the ability to submit assignments, get information from their instructor, and receive and review grades for submitted assignments. The role of “professor” has the ability to post assignments, receive and grade student submissions, send their students information about the class, and post materials for the students to review. The application is hosted on a shared web server and the work was done through a cPanel Portal. The UI is constructed with a custom bootstrap and our functional code is in jQuery. Transactions between our front-end and the MySQL database are handled in PHP. Our final product is a functional web-application that accommodates the must haves outlined in our original design. The main pages are the page for class information, the page for viewing grades, the page for viewing announcements, and the dashboard containing quick information. The pages are designed for the fulfillment of the different roles’ unique needs.https://scholarscompass.vcu.edu/capstone/1168/thumbnail.jp

Expanding the Role of Homework Assignments

Homework offers instructors opportunities to help student develop soft skills. With a little bit of work, we can expand on traditional uses for homework to include opportunities for students to reflect on exams or to evaluate both their own contributions as well as those of other team members on group projects

Teacher Voices: Teaching Young Men of Color

Twelve teachers from diverse geographic and ethnic backgrounds and academic disciplines came together to talk about the role that gender plays in their classrooms. They identified barriers to learning, suggested ways to overcome them, and submitted successful teaching ideas. The report presents the teachers' messages in their own words, as well as classroom assignments they have found effective in teaching young men of color

How Supervisors Influence Performance: A Multilevel Study of Coaching and Group Management in Technology-Mediated Services

This multilevel study examines the role of supervisors in improving employee performance through the use of coaching and group management practices. It examines the individual and synergistic effects of these management practices. The research subjects are call center agents in highly standardized jobs, and the organizational context is one in which calls, or task assignments, are randomly distributed via automated technology, providing a quasi-experimental approach in a real-world context. Results show that the amount of coaching that an employee received each month predicted objective performance improvements over time. Moreover, workers exhibited higher performance where their supervisor emphasized group assignments and group incentives and where technology was more automated. Finally, the positive relationship between coaching and performance was stronger where supervisors made greater use of group incentives, where technology was less automated, and where technological changes were less frequent. Implications and potential limitations of the present study are discussed