The L_X--M relation of Clusters of Galaxies (2008)
Rykoff, E. S., Evrard, A. E., McKay, T. A., Becker, M. R., Johnston, D. E., Koester, B. P., ...
We present a new measurement of the scaling relation between X-ray luminosity and total mass for 17,000 galaxy clusters in the maxBCG cluster sample. Stacking sub-samples within fixed ranges of...
Rykoff, E. S., McKay, T. A., Becker, M. R., Evrard, A., Johnston, D. E., Koester, B. P., ...
Determining the scaling relations between galaxy cluster observables requires large samples of uniformly observed clusters. We measure the mean X-ray luminosity--optical richness (L_X--N_200)...
Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements (2007)
Leauthaud, A., Massey, R., Kneib, J. P., Rhodes, J., Johnston, D. E., Capak, P., ...
With a primary goal of conducting precision weak lensing measurements from space, the COSMOS survey has imaged the largest contiguous area observed by the Hubble Space Telescope (HST) to date using...
Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements (2007)
Leauthaud, A., Massey, R., Kneib, J. P., Rhodes, J., Johnston, D. E., Capak, P., ...
With a primary goal of conducting precision weak lensing measurements from space, the COSMOS survey has imaged the largest contiguous area observed by the Hubble Space Telescope (HST) to date using...
Controlled Fabrication of Nanogaps in Ambient Environment for Molecular Electronics (2005)
Strachan, D. R., Smith, D. E., Johnston, D. E., Park, T. -H., Therien, M. J., Bonnell, D. A., ...
We have developed a controlled and highly reproducible method of making nanometer-spaced electrodes using electromigration in ambient lab conditions. This advance will make feasible single molecule...
STUDY OF PILOT-VEHICLE-CONTROLLER INTEGRATION FOR A MINIMUM COMPLEXITY AFCS. (2005)
A brief analysis demonstrates the technique of, and potential payoffs accruing through, a preliminary design approach which views pilot, vehicle, and automatic flight control system as an integrated...
Variable Faint Optical Sources Discovered by Comparing POSS and SDSS Catalogs (2004)
Sesar, B., Svilkovic, D., Ivezic, Z., Lupton, R. H., Munn, J. A., Finkbeiner, D., ...
We present a study of variable faint optical sources discovered by comparing the Sloan Digital Sky Survey (SDSS) and the Palomar Observatory Sky Survey (POSS) catalogs. We use SDSS measurements to...
A Catalog of Compact Groups of Galaxies in the SDSS Commissioning Data (2003)
Lee, B. C., Allam, S. S., Tucker, D. L., Annis, J., Blanton, M. R., Johnston, D. E., ...
Compact groups (CGs) of galaxies -- relatively poor groups of galaxies in which the typical separations between members is of the order of a galaxy diameter -- offer an exceptional laboratory for the...
A Gravitationally Lensed Quasar with Quadruple Images Separated by 14.62 Arcseconds (2003)
Inada, N., Oguri, M., Pindor, B., Hennawi, J. F., Chiu, K., Zheng, W., ...
Gravitational lensing is a powerful tool for the study of the distribution of dark matter in the Universe. The cold-dark-matter model of the formation of large-scale structures predicts the existence...
Oguri, M., Inada, N., Keeton, C. R., Pindor, B., Hennawi, J. F., Gregg, M. D., ...
We study the recently discovered gravitational lens SDSS J1004+4112, the first quasar lensed by a cluster of galaxies. It consists of four images with a maximum separation of 14.62''. The system has...
The Galaxy-mass Correlation Function Measured from Weak Lensing in the SDSS (2003)
Sheldon, E. S., Johnston, D. E., Frieman, J. A., Scranton, R., McKay, T. A., Connolly, A. J., ...
We present galaxy-galaxy lensing measurements over scales 0.025 to 10 Mpc/h in the Sloan Digital Sky Survey. Using a flux-limited sample of 127,001 lens galaxies with spectroscopic redshifts and mean...
Counts of Low-redshift SDSS Quasar Candidates (2003)
Ivezic, Z., Lupton, R. H., Johnston, D. E., Richards, G. T., Hall, P. B., Schlegel, D., ...
We analyze the counts of low-redshift quasar candidates selected using nine-epoch SDSS imaging data. The co-added catalogs are more than 1 mag deeper than single-epoch SDSS data, and allow the...
Sloan Digital Sky Survey: Early data release (2002)
Stoughton, C., Lupton, R. H., Bernardi, M., Blanton, M. R., Burles, S., Castander, F. J., ...
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of 10 6 galaxies, 100,000...
AN ASSESSMENT OF OPERATIONAL AND COST TRADEOFF FACTORS FOR A TYPICAL HIGH PERFORMANCE AFCS (1998)
Preliminary design evaluation an optimization techniques were applied to an existing operational manned aircraft flight control system (AFCS) to determine: the possibility of improvements in...
DEVELOPMENT OF A CONTROLLER ELEMENT FOR COMPATIBLE OPERATOR CONTROL OF EARTHMOVING MACHINES. (1998)
Johnston,D. E., Weir,D. H., Ringland,R. F., Hofmann,L. G.
Manual control of dozing with an earthmoving tractor is studied to determine ways to modify the manipulator and control system properties to improve performance and reduce operator workload. The...
Retrovirus-mediated transduction of adult hepatocytes.
Wilson, J M, Jefferson, D M, Chowdhury, J R, Novikoff, P M, Johnston, D E, Mulligan, R C
Retrovirus-mediated gene transfer was used to develop a method for introducing genes into primary cultures of adult rat hepatocytes. Subconfluent monolayers of hepatocytes, cultured in hormonally...
Correction of the genetic defect in hepatocytes from the Watanabe heritable hyperlipidemic rabbit.
Wilson, J M, Johnston, D E, Jefferson, D M, Mulligan, R C
Familial hypercholesterolemia is an inherited disease in humans that is caused by a defect in the receptor for low density lipoproteins (LDLR). The existence of an animal model for this disease, the...
Retrovirus-mediated transduction of adult hepatocytes.
Wilson, J M, Jefferson, D M, Chowdhury, J R, Novikoff, P M, Johnston, D E, Mulligan, R C
Retrovirus-mediated gene transfer was used to develop a method for introducing genes into primary cultures of adult rat hepatocytes. Subconfluent monolayers of hepatocytes, cultured in hormonally...
Correction of the genetic defect in hepatocytes from the Watanabe heritable hyperlipidemic rabbit.
Wilson, J M, Johnston, D E, Jefferson, D M, Mulligan, R C
Familial hypercholesterolemia is an inherited disease in humans that is caused by a defect in the receptor for low density lipoproteins (LDLR). The existence of an animal model for this disease, the...