satellite orbit determination is a method of determining the state vector, i.e., position and velocity, of a low earth orbiting (leo) satellite or interplanetary spacecraft. during the past two decades, many satellites with various applications including geodetic applications have been launched at low altitudes. for instance, topex / poseidon, champ, grace and goce are the examples of the geode...

Background: Lemon verbena (Lippia citriodora H.B.K.) is an aromatic and medicinal plant of family Verbenaceae, which cultivated in the North region of Iran. Objective: This comparative study was carried out on essential oil content and composition of Lippia citriodora H.B.K. from micro-propagated and rooted apical stem cutting plantlets. Methods: The micro-propagated plantlets were obtained ...

OBJECTIVE To investigate the relationship between duodenojejunal motor activity and glucose absorption and to evaluate the effect of modification of duodenojejunal motility on glucose absorption by using the prokinetic drug cisapride. RESEARCH DESIGN AND METHODS We examined seven healthy males, mean age 22 years, who were treated with cisapride 10 mg t.i.d. and placebo during 3 days in a rand...

Title of Thesis: Clustering with Propagated Constraints Eric Robert Eaton, Master of Science, 2005 Thesis directed by: Dr. Marie desJardins, Assistant Professor Department of Computer Science and Electrical Engineering Background knowledge in the form of constraints can dramatically improve the quality of generated clustering models. In constrained clustering, these constraints typically specif...

abstract in this paper, we study the generalized order- jacobsthal sequences modulo for and the generalized order-k jacobsthal-padovan sequence modulo for . also, we define the generalized order-k jacobsthal orbit of a k-generator group for and the generalized order-k jacobsthal-padovan orbit a k-generator group for . furthermore, we obtain the lengths of the periods of the generalized order-3 ...

The reconstruction of plasma parameters in the interplanetary medium is very important to understand propagation solar eruptions and for Space Weather application purposes. Because only a few spacecraft are measuring situ these parameters, reconstructions currently performed by running complex numerical Magneto-hydrodynamic (MHD) simulations starting from remote sensing observations Sun. Curren...

As the dimensions of electronic devices become smaller, they enter the realm of nano-electronics, where the device dimensions lie between the inter-atomic spacing (lnm) and the electron wavelength (lOnm). This offers greatly-enhanced packing density and speed of operation, but introduces the difficulty of maintaining signal quality over large distances. The paper introduces an architectural sol...

Accurate and efficient orbital propagators are critical for space situational awareness because they drive uncertainty propagation which is necessary for tracking, conjunction analysis, and maneuver detection. Existing sigma pointor particle-based methods for uncertainty propagation use explicit numerical integrators for propagating the closely spaced orbital states as part of the prediction st...