Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- ALE (1)
- Architecture (1)
- Asynchronous (1)
- Autonomous Operations (1)
- CFD (1)
-
- CubeSat (1)
- Curvilinear (1)
- Earth Station (1)
- Embedded (1)
- Finite Element (1)
- High Order (1)
- Lagrangian (1)
- Lights Out Operations (1)
- Logic (1)
- Medical Device (1)
- Object-oriented Design/Programming (1)
- Process Extraction (1)
- Real-time (1)
- Rule Based System (1)
- Software Architecture (1)
- Software Framework (1)
- St. Jude Medical. (1)
Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Asynchronous Mips Processors: Educational Simulations, Robert L. Webb
Asynchronous Mips Processors: Educational Simulations, Robert L. Webb
Master's Theses
The system clock has been omnipresent in most mainstream chip designs. While simplifying many design problems the clock has caused the problems of clock skew, high power consumption, electromagnetic interference, and worst-case performance. In recent years, as the timing constraints of synchronous designs have been squeezed ever tighter, the efficiencies of asynchronous designs have become more attractive. By removing the clock, these issues can be mitigated. How- ever, asynchronous designs are generally more complex and difficult to debug. In this paper I discuss the advantages of asynchronous processors and the specifics of some asynchronous designs, outline the roadblocks to asynchronous …
St. Jude Medical: An Object-Oriented Software Architecture For Embedded And Real-Time Medical Devices, Atila Amiri
St. Jude Medical: An Object-Oriented Software Architecture For Embedded And Real-Time Medical Devices, Atila Amiri
Master's Theses
Medical devices used for surgical or therapeutic purposes require a high degree of safety and effectiveness. Software is critical component of many such medical devices. The software architecture of a system defines organizational structure and the runtime characteristic of the application used to control the operation of the system and provides a set of frameworks that are used to develop that. As such, the design of software architecture is a critical element in achieving the intended functionality, performance, and safety requirements of a medical device. This architecture uses object-oriented design techniques, which model the underlying system as a set of …
Hidra: Hierarchical Inter-Domain Routing Architecture, Bryan Clevenger
Hidra: Hierarchical Inter-Domain Routing Architecture, Bryan Clevenger
Master's Theses
As the Internet continues to expand, the global default-free zone (DFZ) forwarding table has begun to grow faster than hardware can economically keep pace with. Various policies are in place to mitigate this growth rate, but current projections indicate policy alone is inadequate. As such, a number of technical solutions have been proposed. This work builds on many of these proposed solutions, and furthers the debate surrounding the resolution to this problem. It discusses several design decisions necessary to any proposed solution, and based on these tradeoffs it proposes a Hierarchical Inter-Domain Routing Architecture - HIDRA, a comprehensive architecture with …
High Order Finite Elements For Lagrangian Computational Fluid Dynamics, Truman Everett Ellis
High Order Finite Elements For Lagrangian Computational Fluid Dynamics, Truman Everett Ellis
Master's Theses
A general finite element method is presented to solve the Euler equations in a Lagrangian reference frame. This FEM framework allows for separate arbitrarily high order representation of kinematic and thermodynamic variables. An accompanying hydrodynamics code written in Matlab is presented as a test-bed to experiment with various basis function choices. A wide range of basis function pairs are postulated and a few choices are developed further, including the bi-quadratic Q2-Q1d and Q2-Q2d elements. These are compared with a corresponding pair of low order bi-linear elements, traditional Q1-Q0 and sub-zonal pressure Q1-Q1d. Several test problems are considered including static convergence …
Autonomous Satellite Operations For Cubesat Satellites, Jason Lionel Anderson
Autonomous Satellite Operations For Cubesat Satellites, Jason Lionel Anderson
Master's Theses
In the world of educational satellites, student teams manually conduct operations daily, sending commands and collecting downlinked data. Educational satellites typically travel in a Low Earth Orbit allowing line of sight communication for approximately thirty minutes each day. This is manageable for student teams as the required manpower is minimal. The international Global Educational Network for Satellite Operations (GENSO), however, promises satellite contact upwards of sixteen hours per day by connecting earth stations all over the world through the Internet. This dramatic increase in satellite communication time is unreasonable for student teams to conduct manual operations and alternatives must be …