Thesis (doctoral)--Swedish University of Agricultural Sciences, 2001. / Appendix includes reprints of five papers and manuscripts, four co-authored with others. Includes bibliographical references. Also partially issued electronically via World Wide Web in PDF format; online version lacks appendix

Thesis--School of Advanced Airpower Studies. / Title from title screen (viewed Oct. 22, 2003). "May 1992." Includes bibliographical references.

Thesis--School of Advanced Airpower Studies, Maxwell Air Force Base, Ala., 1996-97. / Title from title screen (viewed Nov. 5, 2003). "August 1998." Includes bibliographical references.

No description available.

Recent evidence suggests that backbarrier structure may act as an historical record of island development, and that backbarrier shorelines can be used as a proxy of an island’s past and future transgressive response to sea-level rise. The structure and stability of back-barrier shorelines are dependent on the geologic framework, defined here as the combination of nearshore topography, underlying geology, and modern geomorphologic forces. This antecedent framework controls and influences the present morphology, nearshore dynamics, and rates of transgression in response to sea-level rise while also acting as a feedback to the estuary ecology on the bayside. It is therefore surprising that our understanding of backbarrier geomorphology is limited. There is a need for an established link between process regimes and an island’s geomorphological history. This thesis bridges the current intellectual gap. The primary hypothesis of this project is that shorelines and bathymetric isolines share quantitative shape signatures indicative of their shared morphological past. To establish this link, the backbarrier shorelines of four United States National Seashores (Fire Island, NY; Assateague Island, MD; Santa Rosa Island, FL; and North Padre Island, TX) are digitized from aerial imagery using the marshline as the shoreline indicator to ensure the inclusion of (vital, sometimes inundated) ecosystems and sediment storage. The alongshore variation of this backbarrier shoreline, the mainland shoreline, lagoon bathymetry, and nearshore bathymetry are each quantified through wavelet analysis and their shape signatures are examined for spatial correspondence. Large and small scale variations are identified and attributed to the geomorphologic controls operating on the same scale and alongshore variation. The result is an improved understanding of how the geologic framework controls backbarrier shoreline shape, which is essentially an expression of the underlying geology.

No description available.

The object proposed in this study is to consider both the activities and the importance of the Pathfinder Force, Royal Air Force, in the Second World War. Their story has a much earlier beginning than 15 August 1942 when the founder squadrons gathered on various R.A.F. stations in the vicinity of the cathedral city of Ely in Cambridgeshire. Some form of target finding and marking became inevitable from the moment it was acknowledged that the preparations that had been made for war during the 1930s were less than adequate. The arguments that ensued pior to August 1942 were much less concerned with the need, than with the form, such a force should take. Unfortunately, while the administrative in-fighting surged back and forth, R.A.F. aircrews went to war not only insufficiently trained but also poorly equipped. Necessity and duty drove these men to attempt to combat weather conditions and enemy defensive measures in aircraft, that all too frequently, were unfitted for the roles they were expected to fulfil. To their credit they pressed on despite the hazards of weather, the fury of enemy defences and the deficiencies of their aircraft and equipment. Regardless of the forces of nature and man ranged against them, the crews of Bomber Command and the Pathfinder Force pressed on. It is therefore fitting that 'Press on Regardless' became the unofficial motto of the Pathfinder Force. It would also provide a singularly apt epitaph for the 3,727 men of the Pathfinder Force who were killed on operations. This work has been written in tribute to all who served in the Pathfinder Force but particularly to those who failed to return.

The ANGEL project (Aerial Network Guided Electronic Lookout) takes a systems engineering approach to the design, development, testing and implementation of a quadrotor unmanned aerial vehicle. Many current research endeavors into the field of quadrotors for use as unmanned vehicles do not utilize the broad systems approach to design and implementation. These other projects use pre-fabricated quadrotor platforms and a series of external sensors in a mock environment that is unfeasible for real world use. The ANGEL system was designed specifically for use in a combat theater where robustness and ease of control are paramount. A complete simulation model of the ANGEL system dynamics was developed and used to tune a custom controller in MATLAB and Simulink®. This controller was then implemented in hardware and paired with the necessary subsystems to complete the ANGEL platform. Preliminary tests show successful operation of the craft, although more development is required before it is deployed in field. A custom high-level controller for the craft was written with the intention that troops should be able to send commands to the platform without having a dedicated pilot. A second craft that exhibits detachable limbs for greatly enhanced transportation efficiency is also in development.

Dependable communication links for unmanned aerial vehicles (UAV) are crucial to operational reliability and mission success. This study is focused on evaluating the probability of successful communication links for small UAVs. A program based on the Friis Transmission Equation was developed to calculate the power received in a line-of-sight communication link. The program was used to evaluate the probability of success for a variety of flight pa

The purpose of this study was to evaluate three sources of geographical information, False Color Composite, Band 5 and Band 7 images of Satellite LANDSAT-2, applied in the detection and delimitation of land cover areas in a case study in the Republic of Venezuela. Previous bibliographic references stated the existence of deciduous, semi-deciduous and evergreen woody vegetation communities in different stages of openess (forest, woodlands, shrublands and thickets) and grasslands, in addition to some kinds of tropical agricultural practices (grazing and cropping areas). The identification of these land cover types was accomplished by visual discrimination of colors in the FCC image and of tones in the Bands 5 and 7. FCC image gave the most complete identification of vegetation communities, agricultural practices and burned areas. Band 7 provided the most accurate delimination of burned areas, water bodies and evergreen forest. Band 5 permited the clearest identification of stages of openess in the vegetation.