Global ETD Search

111	A study of horizontal drifts of irregularities in the ionosphere by analysis of fading records from spaced aerials 沈迪克, Shun, Dick-huck. January 1968 (has links) published_or_final_version / Physics / Master / Master of Science Ionosphere. Ionospheric radio wave propagation.
112	Fracture in particle filled epoxy resins Spanoudakis, John January 1981 (has links) No description available. 620.118 Brittle composites; Crack propagation
113	Smart antennas for high data rate FDD wireless links Allen, Ben January 2001 (has links) No description available. 621.382
114	How to Propagate Agaves and Cacti from Cuttings and Seed Kelly, Jack 01 1900 (has links) 4 pp. / How to transplant a cactus (az1376) Problems and pests of aloes,agaves,cacti and yuccas (az1399) Cactus, Agave,Yucca,and Ocotillo (az1225) / Propagation of agaves and cacti from seed and cuttings is an easy-to-accomplish process. Cuttings and seed sown during the appropriate time of year using the methods discussed will produce numerous progeny. agave cactus propagation seed cuttings
115	Ultrasonic Wave Propagation on an Inclined Solid Half-Space Partially Immersed in a Liquid Dao, Cac Minh January 2007 (has links) The interaction between a bounded ultrasonic beam and a liquid wedge over a solid half-space is studied theoretically as well as experimentally. A semi-analytical technique called Distributed Point Source Method (DPSM) is adopted for modeling the ultrasonic field in a wedge-shaped fluid structure on a solid half-space. This study is important for analyzing and understanding the propagation of ultrasonic waves used for underwater communications and inspections. A better understanding of the elastic wave propagation in water and in submerged marine strata near the seashore requires extensive investigations of such problem geometries. The semi-analytical technique used in this dissertation considers a bounded acoustic beam striking a fluid-solid interface between a fluid wedge and a solid half-space. Solution of this problem is beyond the scope of the currently available analytical methods when the beam is bounded. However, it is important to model the bounded beams because, in all underwater communications and inspections, bounded beams are used. Currently, only numerical method [Boundary Element Method (BEM) or Finite Element Method (FEM)] based packages (e.g., PZFlex) are in principle capable of modeling ultrasonic fields in such structures. However, these packages are not very accurate and are very CPU-intensive for high-frequency ultrasonic problems. At high frequencies, FEM- and BEM-based packages require huge amount of computation memory and time for their executions that the DPSM technique can avoid. The effect of the angle variation between the fluid-solid interface and the fluid wedge on the wave propagation characteristics is studied and presented. Wave Propagation DPSM Elastic Ultrasonic
116	A predictive real time architecture for multi-user, distributed, virtual reality Roberts, David J. January 1996 (has links) No description available. 005 Internet; Network propagation; Protocols
117	Acoustical identification of the characteristics of ocean fronts Radcliffe, Stewart Alexander January 1997 (has links) No description available. 534 Gulf Stream; acoustic propagation
118	High speed double torsion testing of pipe grade polyethylenes Wheel, Marcus A. January 1991 (has links) No description available. 668.4 Plastic pipes; Crack propagation
119	Acoustic diffraction and scattering by waveguide structures Mahmood-ul-Hassan January 1998 (has links) No description available. 510 Wiener-Hopf; Propagation in ducts
120	The production of seed potato (Solanum tuberosum L.) tubers from stem cuttings in Sri Lanka Samarasinghe, P. W. S. Mallika January 1996 (has links) No description available. 630 Seed propagation; Tissue culture

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