The relationship between the principles of PR and successful military management

Thesis (M.S.)--Boston Universit

Floodlight Quantum Key Distribution: A Practical Route to Gbps Secret-Key Rates

The channel loss incurred in long-distance transmission places a significant burden on quantum key distribution (QKD) systems: they must defeat a passive eavesdropper who detects all the light lost in the quantum channel and does so without disturbing the light that reaches the intended destination. The current QKD implementation with the highest long-distance secret-key rate meets this challenge by transmitting no more than one photon per bit [Opt. Express 21, 24550-24565 (2013)]. As a result, it cannot achieve the Gbps secret-key rate needed for one-time pad encryption of large data files unless an impractically large amount of multiplexing is employed. We introduce floodlight QKD (FL-QKD), which floods the quantum channel with a high number of photons per bit distributed over a much greater number of optical modes. FL-QKD offers security against the optimum frequency-domain collective attack by transmitting less than one photon per mode and using photon-coincidence channel monitoring, and it is completely immune to passive eavesdropping. More importantly, FL-QKD is capable of a 2 Gbps secret-key rate over a 50 km fiber link, without any multiplexing, using available equipment, i.e., no new technology need be developed. FL-QKD achieves this extraordinary secret-key rate by virtue of its unprecedented secret-key efficiency, in bits per channel use, which exceeds those of state-of-the-art systems by two orders of magnitude.Comment: 18 pages, 5 figure

Simulation study of pressure and temperature dependence of the negative thermal expansion in Zn(CN)(2)

12 pages, 16 figures12 pages, 16 figures12 pages, 16 figures12 pages, 16 figure

Public Feminisms: From Academy to Community

The field of feminist studies grew from the U.S. women’s movements of the 1960s and 1970s and has continued to be deeply connected to ongoing movements for social justice. As educational institutions are increasingly seeing public scholarship and community engagement as relevant and fruitful complements to traditional academic work, feminist scholars have much to offer in demonstrating different ways to inform and interact with various communities. In this collection, a diverse range of feminist scholar-activists write about the dynamic and varied methods they use to reach beyond traditional classrooms and scholarly journals to share their work with the public. Here is an opportunity to reflect on the meaning and importance of community engagement and to archive some of the important public-facing work feminists are doing today. Faculty, graduate, and undergraduate students, as well as administrators hoping to increase their schools’ connections to the community, will find this volume indispensable. “In Public Feminisms, Baker and Dove-Viebahn have curated a vibrantly intersectional collection of essays that speak both to the longstanding commitment of feminisms to education and activism and the urgent need for this work in the contemporary moment. This book shows how scholar-activists are bringing together knowledge production and the sharing of that knowledge and community engagement through a series of compelling case studies. I can’t wait to teach it.” —Carol A. Stabile, Professor of Women’s, Gender, and Sexuality Studies at University of Oregon Carrie N. Baker is the Sylvia Dlugasch Baumann professor in American Studies and a professor in the Program for the Study of Women and Gender at Smith College. Aviva Dove-Viebahn is Assistant Professor of Film and Media Studies at Arizona State University.https://scholarworks.smith.edu/textbooks/1004/thumbnail.jp

Grid computing and molecular simulations: the vision of the eMinerals Project

This paper discusses a number of aspects of using grid computing methods in support of molecular simulations, with examples drawn from the eMinerals project. A number of components for a useful grid infrastructure are discussed, including the integration of compute and data grids, automatic metadata capture from simulation studies, interoperability of data between simulation codes, management of data and data accessibility, management of jobs and workflow, and tools to support collaboration. Use of a grid infrastructure also brings certain challenges, which are discussed. These include making use of boundless computing resources, the necessary changes, and the need to be able to manage experimentation

Angola Cameia Development Casing-Settlement Calculations

The amount of axial settlement of casings supported by regions of axial elastic foundations is computed. The differential equation of axial equilibrium, including the foundation stiffnesses, is solved by use of cubic axial finite elements. The analysis is applied to 101 m of a vertical 914-mm (36-in.) casing supporting a 559-mm (22-in.) casing running from 3 m above the mudline to near the bottom of the 1201-m hole. The upper casing is supported by a region of layered clay sediments. The lower casing has a long openhole region, followed by a bottom region encased in cement. A series of loading increments is applied, with the connection of the tree/blowout preventer (BOP) as the last. The settlement at the mudline was calculated to be less than 0.1 m. This study shows that for weak upper foundations, a good cement job is needed to support the tree/BOP without large mudline settlements