Design of a Scenario-Based Immersive Experience Room

open1noopenKlopfenstein, Cuno LorenzKlopfenstein, CUNO LOREN

Journal of Telecommunications and Information Technology, 2011, nr 2

kwartalni

Development of anFPGA-based Data Reduction System for the Belle II DEPFET Pixel Detector

The innermost two layers of the Belle II detector at the KEKB collider in Tsukuba, Japan will be covered by highly granular DEPFET pixel sensors. The large number of pixels lead to a maximum data rate of 256 Gbps, which has to be significantly reduced by the Data Acquisition System. For data reduction, the hit information of the silicon-strip vertex detector surrounding the pixel detector is used to define so-called Regions of Interest (ROI) in the pixel detector. Only hit information of the pixels located inside these ROIs are saved. The ROIs for the pixel detector are computed by reconstructing track segments from strip data and extrapolation to the pixel detector. The goal is to achieve a reduction factor of up to 10 with this ROI selection. All the necessary processing stages, the receiving, decoding and multiplexing of SVD data on 48 optical fibers, the track reconstruction and the definition of the ROIs, will be performed by the DATCON system, developed in the scope of this thesis. The planned hardware design is based on a distributed set of Advanced Mezzanine Cards (AMC), each equipped with a Field Programmable Gate Array (FPGA) and four optical transceivers. An algorithm is developed based on a Hough Transformation, a commonly used pattern recognition method in image processing to identify the track segments in the strip detector and calculation of the track parameters. Using simulations, the performance of the developed algorithms are evaluated. For use in the DATCON system the Hough track reconstruction is implemented on FPGAs. Several tests of the modules required to create the ROIs are performed in a simulation environment and tested on the AMC hardware. After a line of successful tests, the DATCON prototype was used in two test beam campaigns to verify the concept and practice the integration with the other detector systems. The developed track reconstruction algorithm shows a high reconstruction efficiency down to low track momenta. A higher data reduction than originally intended was achieved within the limits of the available processing time. The FPGA track reconstruction algorithm is found to be even three times faster than demanded by the trigger rate of the experiment. The used concepts and developed algorithms are not specifically designed for the Belle II vertex detector only, but can be used in different experiments. It was successfully tested on the low-level trigger for Belle II, using drift chamber information and showed a comparably good track reconstruction performance

Security hardened remote terminal units for SCADA networks.

Remote terminal units (RTUs) are perimeter supervisory control and data acquisition (SCADA) devices that measure and control actual physical devices. Cyber security was largely ignored in SCADA for many years, and the cyber security issues that now face SCADA and DCS, specifically RTU security, are investigated in this research. This dissertation presents a new role based access control model designed specifically for RTUs and process control. The model is developed around the process control specific data element called a point, and point operations. The model includes: assignment constraints that limit the RTU operations that a specific role can be assigned and activation constraints that allow a security administrator to specify conditions when specific RTU roles or RTU permissions cannot be used. RTU enforcement of the new access control model depends on, and is supported by, the protection provided by an RTU\u27s operating system. This dissertation investigates two approaches for using minimal kernels to reduce potential vulnerabilities in RTU protection enforcement and create a security hardened RTU capable of supporting the new RTU access control model. The first approach is to reduce a commercial OS kernel to only those components needed by the RTU, removing any known or unknown vulnerabilities contained in the eliminated code and significantly reducing the size of the kernel. The second approach proposes using a microkernel that supports partitioning as the basis for an RTU specific operating system which isolates network related RTU software, the RTU attack surface, from critical RTU operational software such as control algorithms and analog and digital input and output. In experimental analysis of a prototype hardened RTU connected to real SCADA hardware, a reduction of over 50% was obtained in reducing a 2.4 Linux kernel to run on actual RTU hardware. Functional testing demonstrated that different users were able to carryout assigned tasks with the limited set of permissions provided by the security hardened RTU and a series of simulated insider attacks were prevented by the RTU role based access control system. Analysis of communication times indicated response times would be acceptable for many SCADA and DCS application areas. Investigation of a partitioning microkernel for an RTU identified the L4 microkernel as an excellent candidate. Experimental evaluation of L4 on real hardware found the IPC overhead for simulated critical RTU operations protected by L4 partitioning to be sufficiently small to warrant continued investigation of the approach

High performance systems

This document provides a written compilation of the presentations and viewgraphs from the 1994 Conference on High Speed Computing given at the High Speed Computing Conference, {open_quotes}High Performance Systems,{close_quotes} held at Gleneden Beach, Oregon, on April 18 through 21, 1994

Medical and biological physics

ФИЗИКАБИОФИЗИКАФИЗИКА МЕДИЦИНСКАЯЛАБОРАТОРНЫЕ РАБОТЫМЕДИЦИНСКАЯ ФИЗИКАВ пособии содержатся лабораторные работы для иностранных студентов по медицинской и биологической физике

The 1995 Research Reports: NASA/ASEE Summer Faculty Fellowship Program

This document is a collection of technical reports on research conducted by the participants in the 1995 NASA/ASEE Summer Faculty Fellowship Program at the Kennedy Space Center (KSC). This was the eleventh year that a NASA/ASEE program has been conducted at KSC. The 1995 program was administered by the University of Central Florida in cooperation with KSC. The program was operated under the auspices of the American Society for Engineering Education (ASEE) with sponsorship and funding from the Office of Educational Affairs, NASA Headquarters, Washington, D.C. The KSC Program was one of nine such Aeronautics and Space Research Programs funded by NASA Headquarters in 1995. The NASA/ASEE Program is intended to be a two-year program to allow in-depth research by the University faculty member

NASA Tech Briefs, February 2001

The topics include: 1) Application Briefs; 2) National Design Engineering Show Preview; 3) Marketing Inventions to Increase Income; 4) A Personal-Computer-Based Physiological Training System; 5) Reconfigurable Arrays of Transistors for Evolvable Hardware; 6) Active Tactile Display Device for Reading by a Blind Person; 7) Program Automates Management of IBM VM Computer Systems; 8) System for Monitoring the Environment of a Spacecraft Launch; 9) Measurement of Stresses and Strains in Muscles and Tendons; 10) Optical Measurement of Temperatures in Muscles and Tendons; 11) Small Low-Temperature Thermometer With Nanokelvin Resolution; 12) Heterodyne Interferometer With Phase-Modulated Carrier; 13) Rechargeable Batteries Based on Intercalation in Graphite; 14) Signal Processor for Doppler Measurements in Icing Research; 15) Model Optimizes Drying of Wet Sheets; 16) High-Performance POSS-Modified Polymeric Composites; 17) Model Simulates Semi-Solid Material Processing; 18) Modular Cryogenic Insulation; 19) Passive Venting for Alleviating Helicopter Tail-Boom Loads; 20) Computer Program Predicts Rocket Noise; 21) Process for Polishing Bare Aluminum to High Optical Quality; 22) External Adhesive Pressure-Wall Patch; 23) Java Implementation of Information-Sharing Protocol; 24) Electronic Bulletin Board Publishes Schedules in Real Time; 25) Apparatus Would Extract Water From the Martian Atmosphere; 26) Review of Research on Supercritical vs Subcritical Fluids; 27) Hybrid Regenerative Water-Recycling System; 28) Study of Fusion-Driven Plasma Thruster With Magnetic Nozzle; 29) Liquid/Vapor-Hydrazine Thruster Would Produce Small Impulses; and 30) Thruster Based on Sublimation of Solid Hydrazin

Clash of the Titans : impact of convergence and divergence on digital media

Thesis (S.M.M.O.T.)--Massachusetts Institute of Technology, Sloan School of Management, Management of Technology Program, 2003.Includes bibliographical references (leaves 150-153).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.In last decade, the world was bewildered by the dazzling array of choices and offerings of digital technology. While digital convergence has created new possibilities in digital media, it has also created great uncertainty, fragmentation and threats to traditional media. This blossoming of innovations, as I will examine in this thesis, originates not only from the conversion of analog media into the digital domain, but more from a convergence of industries which results in a clash of technologies and cultures. This thesis explores the phenomenon of digital convergence and divergence and examines their impact on digital media. The questions this thesis seeks to answer are: What exactly is digital convergence? Is digital technology a kind of unifying glue as some may claim, or is it turning out to be a catalyst for greater differentiation? What kinds of dynamics will emerge when traditional industries play in each other's familiar turfs? And what kinds of strategies should digital media producers adopt in response? Observations seem to point towards a trend of initial chaos, greater divergence and severe technological fragmentation in the market. However, in that light, the results of this study suggest that collaboration between industry players to establish common standards, as well as the production of content to fit the locality, context and the consumption experience will be the keys to success in the world of digital convergence.by William Chee-Leong Lee.S.M.M.O.T