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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Implementation of a Low Cost Commercial-Off-the-Shelf Commanding System

Grich, Richard J., Jr., Bourassa, Chris R. 10 1900 (has links)
International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Traditional satellite and launch control systems have consisted of custom solutions requiring significant development and maintenance costs. These systems have typically been designed to support specific program requirements and are expensive to modify and augment after delivery. Over the past five years, technical advances have resulted in Commercial-Off-The-Shelf (COTS) products which greatly reduce the complete life cycle costs associated with satellite and launch control system procurements. These advances, however, have been restricted to specific functional areas of the satellite and launch control system - most notably, telemetry processing and simulation. Until recently, technological advances in the development of COTS products which support functional areas like commanding and mission planning have lagged behind. This paper describes the development and application of a COTS product which provides a highly advanced commanding capability that is tightly integrated with the processing of telemetry data. This closed loop telemetry and commanding system forms the basis of a satellite or launch control system at a fraction of the cost normally associated with systems of this kind.
2

Enhancement of COTS GIS Web Publishing Software

Chen, Jin 19 December 2003 (has links)
In the modern geographic information systems, COTS software has been playing a major role. Customizing COTS software is inevitable because large organizations' needs usually exceed COTS built-in functions. However, this is often a challenge to COTS users, since the source code of COTS is rarely available. In my thesis project, I have enhanced some functions of a GIS COTS product, ArcIMS, by taking advantage of this web publishing tool's well-thought architecture of services and its applications of the XML messaging technology. Multiple users now can access the same ArcIMS map service but with only constrained viewing power. Login dialog has been added to the map service, and query tools have been modified to ensure the viewing restraint. Another aspect of this thesis project is to enhance the interactive features, which makes the HTML viewer be capable of carrying out all the functions that the ArcIMS Java plug-in viewer can do.
3

Um estudo empírico sobre engenharia de requisitos em empresas de produtos de software

Cássia Pereira, Silvia January 2007 (has links)
Made available in DSpace on 2014-06-12T16:00:21Z (GMT). No. of bitstreams: 2 arquivo6433_1.pdf: 1054848 bytes, checksum: 25ff3013599c6fa7b495f4b0731aaf38 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2007 / The software market faces an increase in competitivity and in demands for software. Enterprises are led to develop software targeted not only at specific customers but also at huge consumer markets. Companies that deal with several consumer markets are known in the literature as developers of Commercial Off-the-Shelf (COTS), also called packaged software, product software or market-driven software. COTS suppliers face many challenges and problems, mainly those known as Smallto- Medium Enterprises (SME). Some special studies show that the unsuitability of activities comprised by the Requirements Engineering Process is a critical factor for software projects success. Thus, this work presents an empirical study carried out with thirteen product software companies located in Recife - Pernambuco, Brazil. The empirical study was based on Experimental Software Engineering and on the qualitative paradigm, having as its main goal an investigation about which practices are performed and the main challenges and difficulties faced by Small-to-Medium Enterprises throughout the Requirements Engineering process
4

THE RAH-66 COMANCHE NETWORKED BASED DATA ACQUISITION SYSTEM

Dehmelt, Chris 10 1900 (has links)
International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California / Serial interfaces (RS232, RS422/485) have been the standard method of communications in traditional data acquisition systems. The role of these interfaces has been to supply a simple setup and control path between a host and the data acquisition master and little else. Today’s distributed data acquisition systems (DAS), which are comprised of many types of components including Ground Support Computers (GSC), Pilot Control Units (PCU), Data System Control Units (DSCU), Solid State Recorders (SSR), Data Acquisition Units (DAU) and Cockpit Instrumentation Data Systems (CIDS), are ideally suited to the use of Ethernet for not only setup functions, but for the distribution of acquired data and status to an unlimited number of users. Besides the obvious advantage of higher data rates, Ethernet provides other benefits such as greater data integrity, multi-host capability, and common programming interfaces. This paper details the integration of new L3 Communications - Telemetry East (L3-TE) Ethernet based software and hardware components that are part of the Comanche Data Systems equipment suite.
5

An Open Architecture Approach to Networked Telemetry System

Woolridge, Daniel 'Shane' 10 1900 (has links)
ITC/USA 2010 Conference Proceedings / The Forty-Sixth Annual International Telemetering Conference and Technical Exhibition / October 25-28, 2010 / Town and Country Resort & Convention Center, San Diego, California / When designing data transport systems, Telemetry and Communications engineers always face the risk that their chosen hardware will not be available or supported soon after the hardware has been installed. The best way to reduce this risk and ensure the longevity of the system is to select an open architecture standard that is supported by multiple manufacturers. This open architecture should also have the ability to be easily upgraded and provide for all of the features and flexibility that are required to be a reliable carrier-grade edge-device. The PCI Industrial Computer Manufacturers Group (PICMG) developed the MicroTCA open standard to address the specific needs of these Communications and Network System Engineers. This paper describes the MicroTCA architecture and how it can be applied as the ideal edge-device solution for Networked Telemetry Systems applications.
6

COTS System Implementation: Diagnosis Decision of The Misfit Analysis

Kuan, Pei-min 02 August 2008 (has links)
Commercial off-the-shelf systems (COTS) such as enterprise resource planning (ERP) systems are becoming mature technologies to support inter- and intra-company business processes even in intermediate and small organizations. However, such systems are complex and expensive. The decision to install a COTS necessitates a choice of mechanisms to determine whether it fits firm¡¦s requirements. This paper presents a misfit diagnosis decision principle grounded on the COTS misfit analysis methodology proposed by Wu, et al., 2008. We propose a systematic diagnosis decision principle to add on to the misfit analysis methodology by providing support to decision-making in customization or Business Process Engineering (BPR). Our research contributes to the misfit analysis methodology by proposing a systematic diagnosis decision principle that will help both software vendors and organizations when the misfits between firm requirements and COTS functionality are encountered. The results indicate that with this approach, organizations can more easily and systematically determine whether the misfits should be customized or conducted BPR. They also help to evaluate the efforts needed for COTS customization and business process reengineering for each misfit and thereby help to support decision making in customization or BPR, thereby reducing the risk in implementing COTS.
7

Remote Perimeter Monitoring for Agricultural Applications

Crow, Nicholas, Meyer, James, Harrelson, Dustin, Cook, Bradley, Gassel, Jason, Harrington, Brandon 10 1900 (has links)
ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA / A monitoring system has been developed to detect when a large vehicle is gaining access to an area such as an agricultural field or facility through a control gate. The system uses multiple sensors, including Hall-effect, anisotropic magnetoresistor, ultrasonic ranging, and vision. A user is alerted using a conventional cell phone network of the presence of the vehicle. The system is microcontroller based, uses photovoltaic power supply, and leverages commercial off the shelf components wherever feasible. The system detection algorithm was made adaptable, to minimize false alarms and missed detections.
8

Mobile Interaction with Safety Critical Systems : A feasibility study

Jonsson, Erik January 2015 (has links)
Embedded systems exists everywhere around us and the number of applications seems to be ever growing. They are found in electrical devices from coee machines to aircrafts. The common denominator is that they are designed for the specic purpose of the application. Some of them are used in safety critical systems where it is crucial that they operate correct and as intended in order to avoid accidents that can harm humans or properties. Meanwhile, general purpose Commercial O The Shelf (COTS) devices that can be found in the retail store, such as smartphones and tablets, has become a natural part of everyday life in the society. New applications are developed every day that improves everyday living, but numerous are also coupled to specic devices in order to control its functionality. Interaction between embedded systems and the exible devices do however not come without issues. Security, safety and ethical aspects are some of the issues that should be considered. In this thesis, a case study was performed to investigate the feasibility of using mobile COTS products in interaction with safety critical systems with respect to functional safety. Six user scenarios were identied for investigation, which could be of interest for industrial applications; The operator presented live machine data, The operator controlling the machine remotely, The service technician using mobile device in maintenance, service technician reading machine logs from the oce, the production manager analyzing machine productivity logs from the oce and the software manager uploading software. Restrictions in the functional safety standard, IEC 61508, and the characteristics of COTS devices, leads to the conclusion that real time interaction with safety systems is not allowed if the certication is to be preserved. Extracting information used to analyze the system where data is only sent from the machine would be allowed. All scenarios where the machine sends data to the user, and the data is only used as information, are hence allowed if isolation properties are guaranteed. A prototype system was designed and parts of it were implemented to show how sending and logging information can be performed using the company developed communication platform Data Engine.
9

The Self-Testing COTS Components (STECC) Strategy: a new form of improving component testability

Beydeda, Sami, Gruhn, Volker 08 November 2018 (has links)
Development of a software system from existing components can surely have various benefits, but can also entail a series of problems. One type of problems is caused by a limited exchange of information between the developer and user of a component. A limited exchange and thereby a lack of information can have various consequences, among them the requirement to test a component prior to its integration into a software system. A lack of information cannot only make test prior to integration necessary, it can also complicate this tasks. However, difficulties in testing can be avoided if certain provisions to increase testability are taken beforehand. This article describes a new form of improving testability of, particularly commercial, components, the self-testing COTS components (STECC) strategy.
10

CHALLENGES IN MONITORING MODERN INSTRUMENTATION NETWORKS

Blott, Michaela 10 1900 (has links)
ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada / The adoption of commercial off the shelf networks, such as Ethernet, FireWire and FibreChannel, within the avionics community has dramatically changed the architecture of avionics busses and instrumentation networks. Higher bandwidth links and unified interconnects simplify existing infrastructure and wiring. But due to their point-to-point nature, networking topologies are fundamentally different from systems built on legacy bus technologies such as CAIS and MIL-STD-1553. Switched networks and ring topologies pose various challenges for the implementation of network monitoring hardware, and affect the design of bus monitors and distributed data acquisition systems. This paper discusses some of these issues. In particular we address deployment issues, architectural choices such as pass-through versus tap approach, as well as handling of bandwidth requirements and complex communication protocols. We illustrate on the basis of a FireWire monitoring system how these obstacles have been overcome for one given application.

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