• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 21
  • 7
  • 6
  • 3
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 52
  • 8
  • 7
  • 5
  • 5
  • 5
  • 5
  • 4
  • 4
  • 4
  • 4
  • 3
  • 3
  • 3
  • 3
  • 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

A study of the properties and the structure of long-staple air-jet wrap-spun yarn

Baqui, M. Abdul January 1989 (has links)
No description available.
2

Modelling of integrated waste management systems

Sampson, G. January 2001 (has links)
No description available.
3

Avtal i riggade system / Contracts in fixed systems

Gramenius, Tore January 2020 (has links)
Avtalslagen trädde i kraft för över hundra år sedan, och har sedan dess varit hörnstenen i den svenska avtalsrätten. Trots att avtalslagen endast var tänkt att behandla avtal som sluts genom korrespendens används den av dagens jurister för att beskriva avtalsslut för nästan alla typer av avtal, med blandade resultat. En typ av avtal för vilken avtalslagen passar särskilt dåligt är avtal slutna i riggade system, d.v.s. avtal där bara den ena parten aktivt handlar med ett på förhand uppriggat system. Ett nytt sätt att tänka kring avtal måste därför ställas upp för avtalstypen. Uppsatsens syfte är att klargöra vilken avtalsmekanism som används för avtal i riggade system samt hur avtalsinnehållet fastsälls i dessa. Syftet uppnås genom att analysera fyra typfall (Shrink och Click wrap-villkor, onlineauktioner, butikshandel och parkering) och sedan med grund i dessa ställa upp allmänna riktlinjer för hur avtal i riggade system bör behandlas.
4

Integrating a Limiter/Filter/Amplifier into a Conformal Wraparound GPS/TM Antenna Substrate

Ryken, Marv, Davis, Rick, Kujiraoka, Scott 10 1900 (has links)
International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California / Missile instrumentation systems designers are constantly striving to achieve better performance out of their systems. Optimizing the antenna coverage and decreasing the noise figure are constantly strived for in order to improve system performance. At the same time, weapon systems are becoming smaller with the resulting reduced area for instrumentation. One way to achieve a lower system noise figure is to have the limiter, filter, and amplifier (LFA) located as close to the antenna as possible. This can be achieved by integrating the LFA into the substrate of a conformal wraparound antenna. Not only does this decrease the system noise, but it also saves space in an already crowded missile instrumentation section. This paper details the latest efforts in accomplishing this integration.
5

PHASE CENTER MEASUREMENTS FOR A WRAP-AROUND GPS ANTENNA

Meyer, Steven J., Kujiraoka, Scott R. 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / Global Positioning System (GPS) technology is being used as a sensor in telemetry systems to provide time, space and position information (TSPI) as well as end game or vector scoring. The accuracy of these measurements depends on precisely locating the phase center of the GPS antenna. A procedure has not currently been addressed by anyone to measure the phase center of a conformal wrap-around GPS antenna. This paper will discuss some techniques on determining the antenna phase center.
6

DESIGN OF A GPS/TELEMETRY ANTENNA FOR SMALL DIAMETER PROJECTILES

Ryken, Marv, Davis, Rick, Kujiraoka, Scott R. 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / In the past, airplanes, target drones, pods, and large missiles have been instrumented with telemetry, flight termination and beacon tracking antennas to assess performance. With the emerging use of the Global Positioning System (GPS) for tracking purposes, GPS is also included as part of the instrumentation package. This paper addresses the design of a conformal wraparound antenna system to cover the telemetry and GPS L1 frequencies for a small (2.75 inch) diameter airborne projectile. A filter is also integrated into the antenna system to isolate the transmitted telemetry signal from the received GPS signal. This integration is necessary due to the lack of space in the small diameter projectile. Performance characteristics of the prototype antenna system are also presented.
7

PHASE CENTER PROBLEMS WITH WRAP-AROUND ANTENNAS

Meyer, Steven J., Kujiraoka, Scott R. 10 1900 (has links)
International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California / The Joint Advanced Missile Instrumentation (JAMI) program is integrating Global Positioning System (GPS) technology into missile telemetry systems. The weakest link appears to be the GPS antenna. The antenna on a missile is required to be flush mounted for aerodynamic reasons. Due to the missile’s tendency to roll, the antenna needs to be a multi-element omnidirectional antenna array. Therefore an antenna used on missiles is a wrap-around antenna since it will meet the flush mount and rolling requirements by giving omnidirectional coverage. JAMI has used readily available techniques for designing wrap-around telemetry antennas to develop a GPS wrap-around antenna and has discovered a major problem. The Phase Center of a wrap-around antenna tends to be a surface, not a point, and not necessarily at the centerline of the missile body. GPS measurements have been conducted to determine the Phase Center of the antenna. When the Phase Center is large, the GPS receiver perceives it as multipath and integer ambiguities cannot be resolved. This paper addresses the problems that have been uncovered and outlines the steps that are planned to resolve them.
8

New Developments in Integrated Airborne Antennas

Ryken, Marv 10 1900 (has links)
ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada / New developments in miniaturized integrated film bulk acoustic resonator (FBAR) filters and low noise amplifiers have resulted in the possibility of extremely small integrated antenna, filter, and low noise amplifier subsystems for use in airborne telemetry (TM) systems. This paper gives examples of a new development in airborne GPS antennas using an integrated band pass FBAR filter and low noise amplifier. Data is also included on the example antenna in a GPS/TM system.
9

Packing: An Architect's Guide

Lacalamita, Andrea 15 July 2011 (has links)
A study of packing constructs a critique of the everyday: a dialogue between chaos and order, surface and area, interior and exterior, gravity and lightness. In search of tangible expression of the spatial processes I am responsible for, I have become both master architect and expert packer. I have composed this thesis the same way I pack: I have assembled piles of fragments, regrouped them, reconsidered, edited, alloted them more or less space. Things have become more and less valuable. Quotes and images are precious, like artifacts, tucked delicately between text-filled pages. Each word I write, each line I draw, creates a boundary, a parcel, a unit of space set apart from the white of the page. This book is my suitcase.
10

Improving capabilities for dealing with key complexities of water availability modeling

Olmos Alejo, Hector Elias 17 February 2005 (has links)
Water availability has been of great concern in the State of Texas and many other places worldwide. During 1997-2003, pursuant to the 1997 Senate Bill 1, the Texas Commission on Environmental Quality (TCEQ), its partner agencies, and contractors developed a Water Availability Modeling (WAM) System based on the Water Rights Analysis Package (WRAP) model, developed at Texas A&M University. WAM has been widely applied in the State of Texas and because of its convenience, applications, and capabilities, it is planned to be implemented in other States and Countries. This thesis addresses different aspects of WAM, including conditional reliability modeling, firm yield analysis following classic and recently developed methodologies, evaluating the impact of different considerations on reliability analyses, simplification of complex WAM datasets and the display of WRAP results into ArcMap. Conditional reliability modeling evaluates short term diversion/storage reliabilities based on an initial storage level. WRAP-CON has been evaluated and improved, in addition a new modeling methodology has been developed, in which probabilities of occurrence for each hydrologic sequence is based on the relationship between storage and future flows. Recently developed WRAP capabilities have been evaluated, providing users new tools and increased flexibility. Some of these improvements are firm yield analysis, cycling and dual simulation. In addition to improved software, guidelines have also been developed, including a set to simplify extremely large WAM datasets, while maintaining the effect of all the other water rights in a basin.

Page generated in 0.0409 seconds