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The levels of Electromagnetic Interference (EMI) generated by two standard models of Uninterruptible Power Supplies (UPS) were examined. Conducted current measurements were made on all conductors exiting and entering two standard UPS units between the frequency range of 60-Hz up to 50 MHz. EMI reduction actions were undertaken on both units, and the reduction in EMI current resulting from these actions was determined. The before and after mitigation results were compared with EMI limits suggested by available specifications, standards, and other related documents. The results show that a significant reduction in the level of EMI can be achieved in low-to-modest size UPSs using inexpensive, standard, and commercially available filters, provided the filters are installed in an effective manner. The reduction of EMI to harmless levels at radio-receiving and data-processing sites is shown to be feasible.

The levels of Electromagnetic Interference (EMI) generated by two standard models of Uninterruptible Power Supplies (UPS) were examined. Conducted current measurements were made on all conductors exiting and entering two standard UPS units between the frequency range of 60-Hz up to 50 MHz. EMI reduction actions were undertaken on both units, and the reduction in EMI current resulting from these actions was determined. The before and after mitigation results were compared with EMI limits suggested by available specifications, standards, and other related documents. The results show that a significant reduction in the level of EMI can be achieved in low-to-modest size UPSs using inexpensive, standard, and commercially available filters, provided the filters are installed in an effective manner. The reduction of EMI to harmless levels at radio-receiving and data-processing sites is shown to be feasible.

Book Source: Digital Library of India Item 2015.180468 dc.contributor.author: Asha Goyal dc.date.accessioned: 2015-07-07T13:34:07Z dc.date.available: 2015-07-07T13:34:07Z dc.date.digitalpublicationdate: 2005-08-20 dc.identifier.barcode: 1990010088911 dc.identifier.origpath: /rawdataupload/upload/0088/911 dc.identifier.copyno: 1 dc.identifier.uri: http://www.new.dli.ernet.in/handle/2015/180468 dc.description.scannerno: 12 dc.description.scanningcentre: IIIT, Allahabad dc.description.main: 1 dc.description.tagged: 0 dc.description.totalpages: 143 dc.format.mimetype: application/pdf dc.language.iso: English dc.rights: Out_of_copyright dc.source.library: Indian Institute Of Technology Kanpur dc.subject.classification: Technology dc.subject.classification: Engineering. Technology In General dc.subject.classification: Computer Science Engineering dc.title: Computer-aided Analysis Of Business Data Processing Systems

Book Source: Digital Library of India Item 2015.180468 dc.contributor.author: Asha Goyal dc.date.accessioned: 2015-07-07T13:34:07Z dc.date.available: 2015-07-07T13:34:07Z dc.date.digitalpublicationdate: 2005-08-20 dc.identifier.barcode: 1990010088911 dc.identifier.origpath: /rawdataupload/upload/0088/911 dc.identifier.copyno: 1 dc.identifier.uri: http://www.new.dli.ernet.in/handle/2015/180468 dc.description.scannerno: 12 dc.description.scanningcentre: IIIT, Allahabad dc.description.main: 1 dc.description.tagged: 0 dc.description.totalpages: 143 dc.format.mimetype: application/pdf dc.language.iso: English dc.rights: Out_of_copyright dc.source.library: Indian Institute Of Technology Kanpur dc.subject.classification: Technology dc.subject.classification: Engineering. Technology In General dc.subject.classification: Computer Science Engineering dc.title: Computer-aided Analysis Of Business Data Processing Systems

The levels of Electromagnetic Interference (EMI) generated by two standard models of Uninterruptible Power Supplies (UPS) were examined. Conducted current measurements were made on all conductors exiting and entering two standard UPS units between the frequency range of 60-Hz up to 50 MHz. EMI reduction actions were undertaken on both units, and the reduction in EMI current resulting from these actions was determined. The before and after mitigation results were compared with EMI limits suggested by available specifications, standards, and other related documents. The results show that a significant reduction in the level of EMI can be achieved in low-to-modest size UPSs using inexpensive, standard, and commercially available filters, provided the filters are installed in an effective manner. The reduction of EMI to harmless levels at radio-receiving and data-processing sites is shown to be feasible.

A fiber Bragg grating is a portion of a core of a fiber optic strand that has been treated to affect the way light travels through the strand. Light within a certain narrow range of wavelengths will be reflected along the fiber by the grating, while light outside that range will pass through the grating mostly undisturbed. Since the range of wavelengths that can penetrate the grating depends on the grating itself as well as temperature and mechanical strain, fiber Bragg gratings can be used as temperature and strain sensors. This capability, along with the light-weight nature of the fiber optic strands in which the gratings reside, make fiber optic sensors an ideal candidate for flight testing and monitoring in which temperature and wing strain are factors. The purpose of this project is to research the availability of software capable of processing massive amounts of data in both real-time and post-flight settings, and to produce software segments that can be integrated to assist in the task as well.

Y-CDC-MIC__Analysis of Market Opportunities for Control Data Corp - MCCR Item Processing Systems

The research proposal is to support the development of the 'science' behind software engineering in order to ensure required system properties, to compare current software engineering techniques, to develop specification for new design and analysis tools, and to demonstrate the practicality of the 'science'. A hierarchical design schema will be developed within which formal representations and analyses can be defined and the required solutions can be found. Since 'worst case' problems are generally impossible to solve, sufficient design laws or constraints will be developed to ensure solvability of the critical problems. (Author)

A high performance, versatile, and reliable underwater communications capability is of strategic importance to the U.S. Navy. Operational scenarios involving the use, monitoring, and coordination of multiple undersea assets, both manned and unmanned and mobile and fixed, are significantly enhanced by the ability to communicate quickly, reliably, in a wide range of environmental conditions, and with minimal constraints on the actions of the platforms involved. The long-term goal of the effort in underwater acoustic communications is to integrate research in the areas of physical oceanography, ocean acoustics, signal processing, and communications theory to 1. develop a underwater communications capability that can be deployed on and used by a wide range of platforms with minimal required external infrastructure and which achieves reliable and high performance under a wide range of environmental and operational conditions, and 2. develop an communications performance prediction capability that enables commanders to reliably predict the performance of deployed communications systems as a function of environmental conditions and the location, velocity, and capabilities of the deployed assets.

Book Source: Digital Library of India Item 2015.192308 dc.contributor.author: Asha Goyal dc.date.accessioned: 2015-07-08T01:22:59Z dc.date.available: 2015-07-08T01:22:59Z dc.date.digitalpublicationdate: 2005-08-20 dc.identifier.barcode: 1990010090742 dc.identifier.origpath: /rawdataupload/upload/0090/742 dc.identifier.copyno: 1 dc.identifier.uri: http://www.new.dli.ernet.in/handle/2015/192308 dc.description.scannerno: 12 dc.description.scanningcentre: IIIT, Allahabad dc.description.main: 1 dc.description.tagged: 0 dc.description.totalpages: 143 dc.format.mimetype: application/pdf dc.language.iso: English dc.rights: Out_of_copyright dc.source.library: Indian Institute Of Technology Kanpur dc.subject.classification: Technology dc.subject.classification: Engineering. Technology In General dc.subject.classification: Computer Science Engineering dc.title: Computer-aided Analysis Of Business Data Processing Systems

A fiber Bragg grating is a portion of a core of a fiber optic stand that has been treated to affect the way light travels through the strand. Light within a certain narrow range of wavelengths will be reflected along the fiber by the grating, while light outside that range will pass through the grating mostly undisturbed. Since the range of wavelengths that can penetrate the grating depends on the grating itself as well as temperature and mechanical strain, fiber Bragg gratings can be used as temperature and strain sensors. This capability, along with the light-weight nature of the fiber optic strands in which the gratings reside, make fiber optic sensors an ideal candidate for flight testing and monitoring in which temperature and wing strain are factors. A team of NASA Dryden engineers has been working to advance the fiber optic sensor technology since the mid 1990 s. The team has been able to improve the dependability and sample rate of fiber optic sensor systems, making them more suitable for real-time wing shape and strain monitoring and capable of rivaling traditional strain gauge sensors in accuracy. The sensor system was recently tested on the Ikhana unmanned aircraft and will be used on the Global Observer unmanned aircraft. Since a fiber Bragg grating sensor can be placed every halfinch on each optic fiber, and since fibers of approximately 40 feet in length each are to be used on the Global Observer, each of these fibers will have approximately 1,000 sensors. A total of 32 fibers are to be placed on the Global Observer aircraft, to be sampled at a rate of about 50 Hz, meaning about 1.6 million data points will be taken every second. The fiber optic sensors system is capable of producing massive amounts of potentially useful data; however, methods to capture, record, and analyze all of this data in a way that makes the information useful to flight test engineers are currently limited. The purpose of this project is to research the availability of software capable of processing massive amounts of data in both real-time and post-flight settings, and to produce software segments that can be integrated to assist in the task as well. The selected software must be able to: (1) process massive amounts of data (up to 4GB) at a speed useful in a real-time settings (small fractions of a second); (2) process data in post-flight settings to allow test reproduction or further data analysis, inclusive; (3) produce, or make easier to produce, three-dimensional plots/graphs to make the data accessible to flight test engineers; and (4) be customized to allow users to use their own processing formulas or functions and display the data in formats they prefer. Several software programs were evaluated to determine their utility in completing the research objectives. These programs include: OriginLab, Graphis, 3D Grapher, Visualization Sciences Group (VSG) Avizo Wind, Interactive Analysis and Display System (IADS), SigmaPlot, and MATLAB.

This research analyzed the controversy between Halon 1301 and sprinkler systems as to the preferred method of fire protection for essential electronic data processing equipment (EDPE). The existence of such a controversy, backed by the importance of EDP capability to the Air Force, advances in computer technology, and lack of a formal Air Force study in this area suggested that such a study was needed. A comparative analysis methodology was then developed which incorporated eight evaluation criteria representing factors important to the Air Force. The eight criteria were reliability, maintenance, cost, safety, adaptability, catastrophic fire, overseas support, and equipment downtime, Based on an assignment of equal weight to all eight criteria, the comparative analysis revealed that sprinklers were markedly superior to Halon 1301. Therefore, the Air Force should reassess its policy of commitment to Halon 1301 as the primary fire protection system for essential EDPE and take action to avert substandard performance of existing Halon 1301 installations. (Author)

A system of independent computer programs for the processing of digitized pulse code modulated (PCM) and frequency modulated (FM) data is described. Information is stored in a set of random files and accessed to produce both statistical and graphical output. The software system is designed primarily to present these reports within a twenty-four hour period for quick analysis of the helicopter's performance.