Stationary and traveling solitons via local dissipations in Bose-Einstein condensates in ring optical lattices

A model of a Bose-Einstein condensate in a ring optical lattice with atomic dissipations applied at a stationary or at a moving location on the ring is presented. The localized dissipation is shown to generate and stabilize both stationary and traveling lattice solitons. Among many localized solutions, we have generated spatially stationary quasiperiodic lattice soltions and a family of traveling lattice solitons with two intensity peaks per potential well with no counterpart in the discrete case. Collisions between traveling and stationary lattice solitons as well as between two traveling lattice solitons display a critical dependence from the lattice depth. Stable counterpropagating solitons in ring lattices can find applications in gyroscope interferometers with ultra-cold gases.Comment: 8 pages, 14 figure

Interactions and Collisions of Discrete Breathers in Two-Species Bose-Einstein Condensates in Optical Lattices

The dynamics of static and travelling breathers in two-species Bose-Einstein condensates in a one-dimensional optical lattice is modelled within the tight-binding approximation. Two coupled discrete nonlinear Schr\"odinger equations describe the interaction of the condensates in two cases of relevance: a mixture of two ytterbium isotopes and a mixture of $^{87}$Rb and $^{41}$K. Depending on their initial separation, interaction between static breathers of different species can lead to the formation of symbiotic structures and transform one of the breathers from a static into a travelling one. Collisions between travelling and static discrete breathers composed of different species are separated in four distinct regimes ranging from totally elastic when the interspecies interaction is highly attractive to mutual destruction when the interaction is sufficiently large and repulsive. We provide an explanation of the collision features in terms of the interspecies coupling and the negative effective mass of the discrete breathers.Comment: 11 pages, 10 figure

Alien Registration- Campbell, Russell (Limestone, Aroostook County)

https://digitalmaine.com/alien_docs/34152/thumbnail.jp

Optimal land cover mapping and change analysis in northeastern oregon using landsat imagery.

Abstract The necessity for the development of repeatable, efficient, and accurate monitoring of land cover change is paramount to successful management of our planet’s natural resources. This study evaluated a number of remote sensing methods for classifying land cover and land cover change throughout a two-county area in northeastern Oregon (1986 to 2011). In the past three decades, this region has seen significant changes in forest management that have affected land use and land cover. This study employed an accuracy assessment-based empirical approach to test the optimality of a number of advanced digital image processing techniques that have recently emerged in the field of remote sensing. The accuracies are assessed using traditional error matrices, calculated using reference data obtained in the field. We found that, for single-time land cover classification, Bayes pixel-based classification using samples created with scale and shape segmentation parameters of 8 and 0.3, respectively, resulted in the highest overall accuracy. For land cover change detection, using Landsat-5 TM band 7 with a change threshold of 1.75 standard deviations resulted in the highest accuracy for forest harvesting and regeneration mapping

The Oral Approach With Large Classes

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/98132/1/j.1467-1770.1960.tb00726.x.pd

Approaches for the digital profiling of activities and their applications in design information push

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Alien Registration- Campbell, Russell W. (Lincoln, Penobscot County)

https://digitalmaine.com/alien_docs/7419/thumbnail.jp

A technology development program for large space antennas

The design and application of the offset wrap rib and the maypole (hoop/column) antenna configurations are described. The NASA mission model that generically categorizes the classes of user requirements, as well as the methods used to determine critical technologies and requirements are discussed. Performance estimates for the mesh deployable antenna selected for development are presented

Whispering limbs: cross-cultural collaboration in a hybrid of contemporary dance, media, sound and improvisation

Whispering Limbs was a performance collaboration between Cairns-based duo Bonemap, Brisbane-based dance trio Polytoxic, Indigenous Cairns-based dancer Earl Rosas and Townsville-based sound artist Steven Campbell. The collaboration was facilitated by Bonemap's principal artists, Rebecca Youdell and Russell Milledge. Through the lens of cross-cultural collaboration, the work places the dancers in a sweep of surreal landscapes, exploring a range of contemporary cultural and cross-cultural themes within a highly integrated, immersive and improvised performance arena. Devised within two weeks and presented over three nights during the 2009 Cairns On Edge Contemporary Media and Performance Festival, Whispering Limbs presents a cultural mix of Indigenous, Polynesian and Caucasian performance. This paper details the development process, the performance environment, the main themes of the work and the manner in which these themes were realised through a focus on the choreography, video projections and sound design in four of the work's twelve scenes