Search Results - "Davidson, D.W"

Detective quantum efficiency of the Medipix pixel detector by Davidson, D.W., Watt, J., Tlustos, L., Mikulec, B., Campbell, M., Mathieson, K., O'Shea, V., Smith, K.M., Rahman, M.

“…We have measured the intrinsic performance of a digital X-ray detector, the Medipix1, by examining the total detective quantum efficiency (DQE). We studied how…”
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Evidence for micronutrient limitation of biological soil crusts: importance to arid-lands restoration by Bowker, Matthew A., Belnap, Jayne, Davidson, Diane W., Phillips, Susan L.

“…Desertification is a global problem, costly to national economies and human societies. Restoration of biological soil crusts (BSCs) may have an important role…”
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Ecological stoichiometry of ants in a New World rain forest by Davidson, D.W

“…C:N stoichiometry was investigated in relation to diet ($\delta {}^{15}\text{N}$), N-deprivation, and worker body size for a diverse assemblage of tropical…”
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Venom Chemistry of the Ant Myrmicaria melanogaster from Brunei by Jones, Tappey H, Voegtle, Heather L, Miras, Heather M, Weatherford, Robert G, Spande, Thomas F, Garraffo, H. Martin, Daly, John W, Davidson, Diane W, Snelling, Roy R

“…Analysis of the extracts of the ant Myrmicaria melanogaster from Brunei in the Indonesian archipelago by GC-MS and GC-IR revealed the presence of five new…”
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Relationship between plant size and ant associates in two Amazonian ant-plants by Vasconcelos, H.L, Davidson, D.W

“…A survey of two Amazonian melastome ant-plants, Maieta guianensis and Tococa bullifera, revealed a significant difference in plant size according to the…”
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Dose reductions in dental X-ray imaging using Medipix by Watt, J., Davidson, D.W., Johnston, C., Smith, C., Tlustos, L., Mikulec, B., Smith, K.M., Rahman, M.

“…We have measured the noise power spectra for a commercial CCD device, for dental X-ray imaging, and an X-ray photon counting chip, Medipix1. This quantity…”
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Unveiling a Ghost of Amazonian Rain Forests: Camponotus mirabilis, Engineer of Guadua Bamboo by Davidson, D.W, Castro-Delgado, S.R, Arias, J.A, Mann, J

“…Camponotus mirabilis (Hymenoptera: Formicidae) is a highly specialized resident of live Guadua bamboo in western Amazonia. Workers in established colonies open…”
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Experimental studies of species-specificity in Cecropia-ant relationships by Yu, Douglas W., Davidson, Diane W.

“…Strict coevolution requires that interactions among organisms be species-specific. We assessed the relative roles of host- and habitat-specificity in…”
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chemistry of exploding ants, Camponotus SPP. (cylindricus complex) by Jones, T.H, Clark, D.A, Edwards, A.A, Davidson, D.W, Spande, T.F, Snelling, R.R

“…A detailed comparative analysis of the exocrine chemistry of nine Bruneian Camponotus species in the cylindricus complex is reported. Workers of these species…”
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Limitations to flat-field correction methods when using an X-ray spectrum by Davidson, D.W, Fröjdh, C, O'Shea, V, Nilsson, H-E, Rahman, M

“…Flat-field correction methods are implemented in order to eliminate non-uniformities in X-ray imaging sensors. If the compensation is perfect, then the…”
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6-alkylsalicylic acids and 6-alkylresorcylic acids from ants in the genus Crematogaster from Brunei by Jones, T.H, Brunner, S.R, Edwards, A.A, Davidson, D.W, Snelling, R.R

“…The defensive chemistry of two species of ants from Brunei in the genus Crematogaster (Physocrema group) has been investigated. Ants in this group release a…”
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State of the art on epitaxial GaAs detectors by Sun, G.C., Mañez, N., Zazoui, M., Al-Ajili, A., Davidson, D.W., O’Shea, V., Quarati, F., Smith, K.M., Chambellan, D., Gal, O., Pillot, Ph, Lenoir, M., Montagne, J.P., Bchetnia, A., Bourgoin, J.C.

“…We first briefly review the performances for X-ray detection which are obtained using thin epitaxial GaAs layers. We then show that good detectors can be…”
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Myrmecophytic Cecropia: antiherbivore defenses under different nutrient treatments by Folgarait, P.J, Davidson, D.W. (Utah Univ., Salt Lake City (USA). Dept. of Biology)

“…In greenhouse experiments, we compared putative biotic, chemical, physical and phenological defenses of six myrmecophytic Cecropia species cultivated under…”
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Ecological studies of neotropical ant gardens by Davidson, Diane W.

“…In a census taken in Peru's Manu National Park, 10 epiphytic angiosperms from seven plant families established principally on arboreal carton-ant nests. These…”
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MICROTOPOGRAPHY OF MICROBIOTIC CRUSTS ON THE COLORADO PLATEAU, AND DISTRIBUTION OF COMPONENT ORGANISMS by George, D.B., Davidson, D.W., Schliep, K.C., Patrell-Kim, L.J.

“…We analyzed the microtopography of microbiotic soil crusts at 3 sites on the Colorado Plateau of southern. Utah and investigated distributions of cyanobacteria…”
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Spatial resolution of the Medipix2 X-ray imaging detector system by Davidson, D.W., Tlustos, L., Mathieson, K., O'Shea, V., Smith, K.M., Rahman, M.

“…The charge sharing present in a 55 micrometer square pixel matrix of 300 micrometer thick silicon is examined. This is achieved using a commercial simulation…”
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Experimental tests of the optimal diet in two social insects by Davidson, D.W

“…1. Experimental studies of dietary specialization in two species of harvester ants (genus Pogonomyrmex) reveal correspondence to several qualitative…”
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Granivory in a desert ecosystem: experimental evidence for indirect facilitation of ants by rodents by Davidson, D. W., Inouye, R. S., Brown, J. H.

“…Two major groups of desert granivores, ants and rodents, coexist as permanent residents of local desert habitats in southwestern North America. At our Sonoran…”
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Competition among ants for Myrmecophytes and the significance of plant trichomes by Davidson, D.W. (University of Utah, Salt Lake City, Utah), Snelling, R.R, Longino, J.T

“…Data on founding queens and established ant colonies of eight Peruvian rain forest myrmecophytes suggest that ants compete interspecifically for host plants…”
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Pruning of host plant neighbors by ants: an experimental approach by Davidson, Diane W., Longino, John T., Snelling, Roy R.

“…Some ants of myrmecophytic plants either obligately or facultatively prune vegetation surrounding their host trees. Pruning behavior occurs at higher frequency…”
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