Creator | Title | Description | Subject | Date | ||
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1 | Poulter, Charles Dale; Jiang, Yunfeng | BTS1 encodes a geranylgeranyl diphosphate synthase in Saccharomyces cerevisiae | Protein prenylation utilizes different types of isoprenoids groups, namely farnesyl and geranylgeranyl, to modify proteins. These lipophilic moieties attach to carboxyl-terminal cysteine residues to promote the association of soluble proteins to membranes. Most prenylated proteins are geranylgeranyl... | Amino Acid Sequence; Cloning, Molecular; Gene Expression | 1995-09-15 | |

2 | Golden, Kenneth M. | Transition in the fractal geometry of Arctic melt ponds | During the Arctic melt season, the sea ice surface undergoes a remarkable transformation from vast expanses of snow covered ice to complex mosaics of ice and melt ponds. Sea ice albedo, a key parameter in climate modeling, is determined by the complex evolution of melt pond configurations. In fact, ... | 2012-01-01 | ||

3 | Golden, Kenneth M. | The lsing model and critical behavior of transport in binary composite media | We present a general theory for critical behavior of transport in binary composite media. The theory holds for lattice and continuum percolation models in both the static case with real parameters and the quasi-static case (frequency dependent) with complex parameters. Through a direct, analytic cor... | 2012-01-01 | ||

4 | Golden, Kenneth M. | Critical behavior of transport in lattice and continuum percolation models | It has been observed that the critical exponents of transport in the continuum, such as in the Swiss cheese and random checkerboard models, can exhibit nonuniversal behavior, with values different than the lattice case. Nevertheless, it is shown here that the transport exponents for both lattice a... | Ising model; Magnetization; Scaling | 1997 | |

5 | Golden, Kenneth M. | Statistical mechanics of conducting phase transitions | The critical behavior of the effective conductivity o* of the random resistor network in Zd, near its percolation threshold, is considered. The network has bonds assigned the conductivities 1 and E >_0 in the volume fractions p and 1 -p. Motivated by the statistical mechanics of an Ising ferromagn... | Resistor; Ising; Ferromagnet | 1995 | |

6 | Golden, Kenneth M. | Climate change and the mathematics of transport in sea ice | As the boundary layer between the ocean and atmosphere in the polar regions, sea ice is a critical component of the global climate system. As temperatures on Earth have warmed, the Arctic sea ice pack in particular has exhibited a dramatic decline in its summer extent. Indeed, the polar sea-ice pack... | Polar ice; Fluid flow; Complex permittivity | 2009 | |

7 | Golden, Kenneth M. | Brine percolation and the transport properties of sea ice | Sea ice is distinguished from many other porous composites, such as sandstones or bone, in that its microstructure and bulk material properties can vary dramatically over a small temperature range. For brine-volume fractions below a critical value of about 5%, which corresponds to a critical tempera... | Brine volume; Percolation theory; Connectedness properties | 2001 | |

8 | Golden, Kenneth M. | Physical and structural characteristics of Weddell Sea pack ice | Recent studies by CRREL researchers of the dynamics and thermodynamics of sea ice in the Antarctic have included investigations of the physical and structural properties of pack ice in the Weddell Sea. The formation of pack ice and its subsequent movement from source areas in the Weddell Sea is part... | Salinity; Brine; Frazil | 1987 | |

9 | Golden, Kenneth M. | Exact result for the effective conductivity of a continuum percolation model | A random two-dimensional checkerboard of squares of conductivities 1 and 8 in proportions p and 1 - p is considered. Classical duality implies that the effective conductivity obeys o* = V8 at p = 1/2. It is rigorously found here that to leading order as 8--0, this exact result holds for all p in the... | Particles; Matrix; Checkerboard | 1994 | |

10 | Golden, Kenneth M.; Zhu, Jing Yi | Network model for fluid transport through sea ice | The flow of liquid through porous sea ice is a fundamental process affecting problems in polar biology, oceanography and geophysics. The geometry and connectedness of the pore microstructure of sea ice determine its fluid permeability, which depends strongly on temperature. Here we analyze a simple ... | Fluid transport; Pipe network; Brine | 2006 | |

11 | Golden, Kenneth M. | Nash estimates and the asymptotic behavior of diffusions | In order to analyze the asymptotic behavior of a particle diffusing in a drift field derived from a smooth bounded potential, we develop Nash-type a priori estimates on the transition density of the process. As an immediate consequence of the estimates, we find that for a rapidly decaying potential... | Potentials; Transition; Divergence | 1988 | |

12 | Fife, Paul C.; McMurtry, Patrick | Multiscale analysis of heat transfer in fully developed turbulent channel flow | An analysis is given for fully developed thermal transport through a wall-bounded turbulent fluid with constant heat flux supplied at the boundary. The analysis proceeds from the aver-aged heat equation and utilizes, as principal tools, various scaling considerations. The paper first provides an acc... | Turbulant flow; Channel flow; Heat transfer; Multiscale analysis | 2005-12 | |

13 | Golden, Kenneth M. | Modeling of anisotropic electromagnetic reflection from sea ice | The contribution of brine layers to observed reflective anisotropy of sea ice at 100 MHz is quantitatively assessed, and a theoretical explanation for observed reflective anisotropy is proposed in terms of anisotropic electric flux penetration into the brine layers. The sea ice is assumed to be a st... | Brine; Anisotropy; Polarization | 1981 | |

14 | Golden, Kenneth M. | Broad spectral, interdisciplinary investigation of the electromagnetic properties of sea ice | This paper highlights the interrelationship of research completed by a team of investigators and presented in the several individual papers comprising this Special Section on the Office of Naval Research (ONR), Arlington, VA, Sponsored Sea Ice Electromagnetics Accelerated Research Initiative (ARI). | Scattering; Radiation; EM | 1998 | |

15 | Golden, Kenneth M. | Classical transport in quasiperiodic media | Abstract. Classical transport coefficients such as the effective conductivity or diffusivity of a quasiperiodic medium were observed [1] to depend discontinuously on the frequencies of the quasiperiodicity. For example, for a one-dimensional medium with a potential V(x) = cosx + coskx , the effecti... | Transport; Diffusion; Random | 1991 | |

16 | Golden, Kenneth M. | Bounds on the complex permittivity of sea ice | An analytic method for obtaining bounds on effective properties of composites is applied to the complex permittivity e* of sea ice. The sea ice is assumed to be a two-component random medium consisting of pure ice of permittivity e1, and brine of permittivity e2. The method exploits the properties ... | Brine; Properties; Geometry | 1995 | |

17 | Greene, Stephen Andrew; Golden, Kenneth M. | Composite microstructures and climate change | Develop mathematical models to better understand the changes in sea ice as it pertains to global climate. Compare Diffusion Limited Aggregates (DLA) and Electrorheological (ER) fluids to sea ice microstructures. | Composite microstructures; Climate change; Effect on climate; Trapeze Interactive Poster | 2010-03-15 | |

18 | Golden, Kenneth M. | Convexity in random resistor networks | The bulk conductivity o*(p) of the bond lattice in Zd is considered, where the conductivity of the bonds is either 1 with probability p or e > 0 with probability 1 - p. Rigorous and non-rigorous results demonstrating convexity of o*(p) near the percolation threshold pc are presented. | Conductivity; Bond lattice; Critical exponent t | 1989 | |

19 | Golden, Kenneth M. | Bounds on the complex permittivity of matrix-particle composites | The complex effective dielectric constant E* of matrix-particle composites is considered. Such composites consist of separated inclusions of material of type one embedded in a matrix of material of type two. The analytic continuation method is used to derive a series of bounds which incorporate a n... | Random; Parameters; Continuation | 1995 | |

20 | Fife, Paul C.; McMurtry, Patrick | Stress gradient balance layers and scale hierarchies in wall-bounded turbulent flows | Steady Couette and pressure-driven turbulent channel flows have large regions in which the gradients of the viscous and Reynolds stresses are approximately in balance (stress gradient balance regions). In the case of Couette flow, this region occupies the entire channel. Moreover, the relevant featu... | Couette flow; Stress gradient balance; Reynolds stress; Turbulent channel flow | 2005 | |

21 | Golden, Kenneth M. | Forward electromagnetic scattering models for sea ice | Recent advances in forward modeling of the electromagnetic scattering properties of sea ice are presented. In particular, the principal results include the following: 1) approximate calculations of electromagnetic scattering from multilayer random media with rough interfaces, based on the distorte... | Polar ice; Electromagnetic scattering; Electromagnetic scattering forward problems; Multilayer random media; Dielectric materials; Nonhomogeneous media; Remote sensing | 1998 | |

22 | Golden, Kenneth M. | Arbitrarily slow approach to limiting behavior | ABSTRACT. Let f(k, t): RN x [0, oo) -- R be jointly continuous in k and t, with lim(t)--(oo) f(k, t) = F(k) discontinuous for a dense set of k's. It is proven that there exists a dense set T of k's such that, for k e T , |f(k, t) - F(k)| approaches 0 arbitrarily slowly, i.e., roughly speaking, more ... | Random; Conductivity; Diffusion | 1991 | |

23 | Golden, Kenneth M. | Sea ice studies in the Weddell Sea aboard USCGC Polar Sea | Our purpose was to investigate several of the characteristics of Weddell Sea pack ice that may affect the relative roles of dynamics and thermodynamics of pack ice development in this region. The total pack ice production and the movement of pack ice from its source area in the Weddell Sea is part... | Floes.; Salinity; Formation | 1980 | |

24 | Golden, Kenneth M. | Critical behavior of transport in percolation-controlled smart composites | The electrical transport properties of many smart composites and other technologically important materials are dominated by the connectedness, or percolation properties of a particular component. Predicting the critical behavior of such media near their percolation threshold, where one typically obt... | Matrix-particle composites | 1997 | |

25 | Golden, Kenneth M. | Electrical transport in high contrast composite materials | A broad range of problems in the physics of materials involve highly disordered media whose effective behavior depends critically on the connectedness, or percolation properties of a particular component. Examples include smart materials such as piezoresistors and thermistors, smart insulators, rada... | 1997 |