Forecasted 21 cm constraints on compensated isocurvature perturbations (2009)
Gordon, Christopher, Pritchard, Jonathan R.
A "compensated" isocurvature perturbation consists of an overdensity (or underdensity) in the cold dark matter which is completely cancelled out by a corresponding underdensity (or overdensity) in...
Dark Energy Observables Making Light of the Dark Side (2008)
Wayne Hu, Christopher Gordon, Zoltan Haiman, Bhuvnesh Jain, Marcos Lima, Ryan Scranton, ...
• Dark matter simulations approaching the accuracy of CMB calculations
Probing the Primordial Power Spectrum with Cluster Number Counts (2008)
Chantavat, Teeraparb, Gordon, Christopher, Silk, Joseph
We investigate how well galaxy cluster number counts can constrain the primordial power spectrum. Measurements of the primary anisotropies in the cosmic microwave background (CMB) may be limited, by...
Floodplains: Critically threatened ecosystems (2008)
Tockner, Klement, Bunn, Stuart, Gordon, Christopher, Naiman, Robert J., Quinn, Gerry P., Stanford, Jack A.
Flood plains: Critically threatened ecosystems (2008)
Tockner, Klement, Bunn, Stuart, Gordon, Christopher, Naiman, Robert J., Quinn, Gerry P., Stanford, Jack A.
Riparian zones, river-marginal wetland environments and flood plains are key landscape elements with a high diversity of natural functions and services. They are dynamic systems that are shaped by...
Flood plains: Critically threatened ecosystems (2008)
Tockner, Klement, Bunn, Stuart, Gordon, Christopher, Naiman, Robert J., Quinn, Gerry P., Stanford, Jack A.
Riparian zones, river-marginal wetland environments and flood plains are key landscape elements with a high diversity of natural functions and services. They are dynamic systems that are shaped by...
Gordon, Christopher, Land, Kate, Slosar, Anze
We estimate the solar system motion relative to the cosmic microwave background using type Ia supernovae (SNe) measurements. We take into account the correlations in the error bars of the SNe...
Gordon, Christopher, Trotta, Roberto
Bayesian model selection provides a formal method of determining the level of support for new parameters in a model. However, if there is not a specific enough underlying physical motivation for the...
Cosmological Constraints from Type Ia Supernovae Peculiar Velocity Measurements (2007)
Gordon, Christopher, Land, Kate, Slosar, Anze
We detect the correlated peculiar velocities of nearby type Ia supernovae (SNe), while highlighting an error in some of the literature. We find sigma_8=0.79 +/- 0.22 from SNe, and examine the...
Broken Isotropy from a Linear Modulation of the Primordial Perturbations (2006)
A linear modulation of the primordial perturbations is proposed as an explanation for the observed asymmetry between the northern and southern hemispheres of the Wilkinson Microwave Anisotropy Probe...
Major, Minor and Trace Element Chemistry of Taiwan Bedrock (2006)
Gordon, Christopher, Goldsmith, Steven T., Bhattiprolu, Sreenivas N.
Recent sediment flux estimates have shown that rivers draining Taiwan and other high-standing oceanic islands in Austral-Asia contribute a significant fraction of the total sediment flux to the...
Spontaneous Isotropy Breaking: A Mechanism for CMB Multipole Alignments (2005)
Gordon, Christopher, Hu, Wayne, Huterer, Dragan, Crawford, Tom
We introduce a class of models in which statistical isotropy is broken spontaneously in the CMB by a non-linear response to long-wavelength fluctuations in a mediating field. These fluctuations...
The Amplitude of Dark Energy Perturbations (2005)
Gordon, Christopher, Wands, David
We propose a model which produces dark energy perturbations large enough to explain the lack of power seen at the quadrupole scale in the cosmic microwave background. If the dark energy is frozen...
A Separate Universe Approach to Quintessence Perturbations (2005)
There is some observational evidence that the dark energy may not be smooth on large scales. This makes it worth while to try and get as simple and as intuitive a picture of how dark energy...
A Low CMB Quadrupole from Dark Energy Isocurvature Perturbations (2004)
Gordon, Christopher, Hu, Wayne
We explicate the origin of the temperature quadrupole in the adiabatic dark energy model and explore the mechanism by which scale invariant isocurvature dark energy perturbations can lead to its...
Gordon, Christopher, Malik, Karim A.
In the curvaton model of inflation, where a second scalar field, the “curvaton,” is responsible for the observed inhomogeneity, a nonzero neutrino degeneracy may lead to a characteristic pattern...
Wayne Hu, Christopher Gordon, Matt Hedman, Gil Holder, Manoj Kaplinghat, Kendrick Smith, ...
gravitational waves 10 100 1000 l (multipole)
Gordon, Christopher, Malik, Karim A.
In the curvaton model of inflation, where a second scalar field, the "curvaton", is responsible for the observed inhomogeneity, a non-zero neutrino degeneracy may lead to a characteristic pattern of...
Density perturbations in a brane-world universe with dark radiation (2003)
Gumjudpai, Burin, Maartens, Roy, Gordon, Christopher
We investigate the effects on cosmological density perturbations of dark radiation in a Randall-Sundrum 2 type brane-world. Dark radiation in the background is limited by observational constraints to...
The balancing act : providing effective reading instruction in the middle grades / (2003)
Thesis (Education)--Mount Mary College, 2003.
Observational constraints on the curvaton model of inflation (2002)
Gordon, Christopher, Lewis, Antony
Simple curvaton models can generate a mixture of of correlated primordial adiabatic and isocurvature perturbations. The baryon and cold dark matter isocurvature modes differ only by an...
Cosmological Perturbations Through a General Relativistic Bounce (2002)
Gordon, Christopher, Turok, Neil
The ekpyrotic and cyclic universe scenarios have revived the idea that the density perturbations apparent in today's universe could have been generated in a `pre-singularity' epoch before the big...
Adiabatic and entropy perturbations in cosmology (2001)
This PhD thesis presents a study of the effect and generation of non-adiabatic perturbations in Cosmology. We study adiabatic (curvature) and entropy (isocurvature) perturbations produced during a...
Correlated perturbations from inflation and the cosmic microwave background (2001)
Amendola, Luca, Gordon, Christopher, Wands, David, Sasaki, Misao
We compare the latest cosmic microwave background data with theoretical predictions including correlated adiabatic and CDM isocurvature perturbations with a simple power-law dependence. We find that...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Adiabatic and entropy perturbations in cosmology. (2001)
Thesis (Ph. D.)--University of Portsmouth, 2001.
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Previous data have shown that the most prevalent, indirect plasma volume (PV) measurement technique, which utilises changes in haematocrit (Hct) and haemoglobin concentration ([Hb]), underestimates...
Inflationary Initial Conditions Consistent with Causality (2000)
Berera, Arjun, Gordon, Christopher
The initial condition problem of inflation is examined from the perspective of both spacetime embedding and scalar field dynamics. The spacetime embedding problem is solved for arbitrary initial...
Adiabatic and entropy perturbations from inflation (2000)
Gordon, Christopher, Wands, David, Bassett, Bruce A., Maartens, Roy
We study adiabatic (curvature) and entropy (isocurvature) perturbations produced during a period of cosmological inflation that is driven by multiple scalar fields with an arbitrary interaction...
A Generalization of the Maximum Noise Fraction Transform (2000)
A generalization of the maximum noise fraction (MNF) transform is proposed. Powers of each band are included as new bands before the MNF transform is performed. The generalized MNF (GMNF) is shown to...
Density perturbations in the brane-world (2000)
Gordon, Christopher, Maartens, Roy
In Randall-Sundrum-type brane-world cosmologies, density perturbations generate Weyl curvature in the bulk, which in turn backreacts on the brane via stress-energy perturbations. On large scales, the...
Restoring the sting to metric preheating (1999)
Bassett, Bruce A., Gordon, Christopher, Maartens, Roy, Kaiser, David I.
The relative growth of field and metric perturbations during preheating is sensitive to initial conditions set in the preceding inflationary phase. Recent work suggests this may protect super-Hubble...
Artificial Neural Network Modeling of Forest Tree Growth (1999)
The problem of modeling forest tree growth curves with an artificial neural network (NN) is examined. The NN parametric form is shown to be a suitable model if each forest tree plot is assumed to...
Report (M. Pub. Aff.)--University of Texas at Austin, 1996.
Studies on the crustacean zooplankton of the Thames estuary. (1994)
Thesis (Ph. D.)--University of London, 1994.
Thesis (M. Sc.)--University of British Columbia, 1983.
The Colloquial Landscape (1000)
Wayne Hu, Christopher Gordon, Matt Hedman, Gil Holder, Manoj Kaplinghat, Kendrick Smith, ...
gravitational waves