Results for "K. J. H. Phillips"

total 263029took 0.13s
Highly ionized Fe X-ray lines at energies 7.7-8.6 keVSep 09 2008Fe XXV lines at 1.85 A (6.70 keV) and nearby Fe XXIV satellites have been widely used for determining the temperature of the hottest parts of solar flare and tokamak plasmas, though the spectral region is crowded and the lines are blended during flare ... More
The Solar Photospheric-to-Coronal Fe abundance from X-ray Fluorescence LinesDec 23 2011The ratio of the Fe abundance in the photosphere to that in coronal flare plasmas is determined by X-ray lines within the complex at 6.7~keV (1.9~\AA) emitted during flares. The line complex includes the He-like Fe (\fexxv) resonance line $w$ (6.70~keV) ... More
The Solar Flare Iron AbundanceJan 13 2012The abundance of iron is measured from emission line complexes at 6.65 keV (Fe line) and 8 keV (Fe/Ni line) in {\em RHESSI} X-ray spectra during solar flares. Spectra during long-duration flares with steady declines were selected, with an isothermal assumption ... More
High time resolution observations of solar H-alpha flares - II. Search for signatures of electron beam heatingOct 21 2011Aims. The H-alpha emission of solar flare kernels and associated hard X-ray (HXR) emission often show similar time variations but their light curves are shifted in time by energy transfer mechanisms. We searched for fast radiative response of the chromosphere ... More
The X-Ray Line Feature At 3.5 Kev In Galaxy Cluster SpectraJul 16 2015Recent work by Bulbul et al. and Boyarsky et al. has suggested that a line feature at approx. 3.5 keV in the X-ray spectra of galaxy clusters and individual galaxies seen with XMM-Newton is due to the decay of sterile neutrinos, a dark matter candidate. ... More
RESIK observations of He-like Ar X-ray line emission in solar flaresJun 09 2008The Ar XVII X-ray line group principally due to transitions 1s2 - 1s2l (l=s, p) near 4 Anstroms was observed in numerous flares by the RESIK bent crystal spectrometer aboard CORONAS-F between 2001 and 2003. The three line features include the Ar XVII ... More
Soft X-ray coronal spectra at low activity levels observed by RESIKMar 15 2010The quiet-Sun X-ray emission is important for deducing coronal heating mechanisms, but it has not been studied in detail since the Orbiting Solar Observatory (OSO) spacecraft era. Bragg crystal spectrometer X-ray observations have generally concentrated ... More
RESIK Solar X-ray flare element abundances on a non-isothermal assumptionMar 03 2015Solar X-ray spectra from the RESIK crystal spectrometer on the {\em CORONAS-F} spacecraft (spectral range $3.3-6.1$~\AA) are analyzed for thirty-three flares using a method to derive abundances of Si, S, Ar, and K, emission lines of which feature prominently ... More
Silicon abundance from RESIK solar flare observationsDec 12 2012The RESIK instrument on the CORONAS-F spacecraft obtained solar flare and active region X-ray spectra in four channels covering the wavelength range 3.8 -- 6.1 \AA in its operational period between 2001 and 2003. Several highly ionized silicon lines were ... More
RHESSI Observations of the Solar Flare Iron-line Feature at 6.7 keVJul 13 2006Analysis of RHESSI 3--10 keV spectra for 27 solar flares is reported. This energy range includes thermal free--free and free--bound continuum and two line features, at 6.7keV and 8keV, principally due to highly ionized iron (Fe). We used the continuum ... More
The SECIS instrument on the Lomnicky Peak ObservatoryApr 20 2010Heating mechanisms of the solar corona will be investigated at the high-altitude solar observatory Lomnicky Peak of the Astronomical Institute of SAS (Slovakia) using its mid-size Lyot coronagraph and post-focal instrument SECIS provided by Astronomical ... More
Highly Ionized Sodium X-ray Line Emission from the Solar Corona and the Abundance of SodiumMay 24 2010{The \ion{Na}{x} X-ray lines between 10.9 and 11.2~\AA\ have attracted little attention but are of interest since they enable an estimate of the coronal abundance of Na to be made. This is of great interest in the continuing debate on the nature of the ... More
Redshifted molecular absorption systems towards PKS1830-211 and B0218+357: submillimeter CO, CI and H2O dataAug 19 1997We have detected the J=4-3 rotational transition of 12CO in absorption at z=0.89 towards the quasar PKS1830-211, but not the 12CO 5-4 or the 3P1-3P0 fine structure line of neutral carbon. The intervening molecular medium thus has a total 12CO column density ... More
The solar X-ray continuum measured by RESIKJan 14 2010The solar X-ray continuum emission at five wavelengths between 3.495 Angstroms and 4.220 Angstroms for 19 flares in a seven-month period in 2002--2003 was observed by the RESIK crystal spectrometer on CORONAS-F. In this wavelength region, free--free and ... More
Highly Ionized Potassium Lines in Solar X-ray Spectra and the Abundance of PotassiumJan 10 2010The abundance of potassium is derived from X-ray lines observed during flares by the RESIK instrument on the solar mission CORONAS-F between 3.53 A and 3.57 A. The lines include those emitted by He-like K and Li-like K dielectronic satellites, which have ... More
Solar Flare Composition and Thermodynamics from RESIK X-ray SpectraApr 23 2014Apr 24 2014Previous estimates of the solar flare abundances of Si, S, Cl, Ar, and K from the RESIK X-ray crystal spectrometer on board the CORONAS-F spacecraft were made on the assumption of isothermal X-ray emission. We investigate the effect on these estimates ... More
The Solar Flare Chlorine Abundance from RESIK X-ray SpectraJun 07 2011The abundance of chlorine is determined from X-ray spectra obtained with the RESIK instrument on {\em CORONAS-F} during solar flares between 2002 and 2003. Using weak lines of He-like Cl, \ion{Cl}{16}, between 4.44 and 4.50 \AA, and with temperatures ... More
A solar spectroscopic absolute abundance of argon from RESIKJul 21 2010Observations of He-like and H-like Ar (Ar XVII and Ar XVIII) lines at 3.949 Angstroms and 3.733 Angstroms respectively with the RESIK X-ray spectrometer on the CORONAS-F spacecraft, together with temperatures and emission measures from the two channels ... More
The Solar Flare Sulphur Abundance from RESIK ObservationsMar 27 2012The RESIK instrument on {\em CORONAS-F} spacecraft observed several sulphur X-ray lines in three of its four channels covering the wavelength range 3.8-6.1 \AA\ during solar flares. The fluxes are analyzed to give the sulphur abundance. Data are chosen ... More
Solar coronal observations at high frequenciesNov 22 2001The Solar Eclipse Coronal Imaging System (SECIS) is a simple and extremely fast, high-resolution imaging instrument designed for studies of the solar corona. Light from the corona (during, for example, a total solar eclipse) is reflected off a heliostat ... More
Search for Rapid Changes in the Visible-Light Corona during the 21 June 2001 Total Solar EclipseSep 27 2010Some 8000 images obtained with the SECIS fast-frame CCD camera instrument located at Lusaka, Zambia, during the total eclipse of 21 June 2001 have been analyzed to search for short-period oscillations in intensity that could be a signature of solar coronal ... More
The Extended Methanol Maser Emission in W51Jan 27 2004The European VLBI Network (EVN) has been used to make phase referenced, wide-field (several arcminute) spectral line observations of the 6.7-GHz methanol maser emission towards W51. In the W51main region, the bulk of the methanol is offset from an UCHII ... More
A Search for High-Frequency Coronal Brightness Variations in the 21 August 2017 Total Solar EclipseMar 14 2019We report on a search for short-period intensity variations in the green-line FeXIV 530.3 nm emission from the solar corona during the 21 August 2017 total eclipse viewed from Idaho in the United States. Our experiment was performed with a much more sensitive ... More
Axioms for trimedial quasigroupsOct 12 2003Jan 24 2004We give new equations that axiomatize the variety of trimedial quasigroups. We also improve a standard characterization by showing that right semimedial, left F-quasigroups are trimedial.
QCD: Quantum Chromodynamic DiffractionFeb 13 1996The first measurements of the diffractive structure function $F_2^{D(3)}$ at HERA are discussed. A factorisable interpretation in which a partonic structure is assigned to the pomeron is investigated through QCD analyses in which both the quark and gluon ... More
Commutants of Bol loops of Odd OrderJul 14 2002In this note we show that the commutant of a Bol loop of odd order is a subloop.
Rectangular loops and rectangular quasigroupsSep 05 2004Dec 18 2004We solve two problems posed by Krape\v{z} by finding a basis of seven independent axioms for the variety of rectangular loops. Six of these axioms form a basis for the variety of rectangular quasigroups. The proofs of the lemmas showing that the six axioms ... More
Dynamical Mean Field Theory of Double Perovskite FerrimagnetsOct 29 2002The dynamical mean field method is used to analyze the magnetic transition temperature and optical conductivity of a model for the ferrimagnetic double perovskites such as $Sr_2FeMoO_6$. The calculated transition temperatures and optical conductivities ... More
The Magnetic Association of Coronal Bright PointsOct 28 1998Several coronal bright points identified in a quiet region of the Sun from SOHO/EIT Fe XII images are found to have a time evolution from birth to decay which is extremely well correlated with the rise and fall of magnetic flux as determined from photospheric ... More
A Note on Trimedial QuasigroupsJun 13 2002The purpose of this brief note is to sharpen a result of Kepka about the axiomization of the variety of trimedial quasigroups.
Solar Flare Element Abundances from the Solar Assembly for X-rays (SAX) on MESSENGERMar 05 2015X-ray spectra in the range $1.5-8.5$~keV have been analyzed for 526 large flares detected with the Solar Assembly for X-rays (SAX) on the Mercury {\em MESSENGER} spacecraft between 2007 and 2013. For each flare, the temperature and emission measure of ... More
Strongly inhibited transport of a 1D Bose gas in a latticeOct 19 2004Nov 23 2004We report the observation of strongly damped dipole oscillations of a quantum degenerate 1D atomic Bose gas in a combined harmonic and optical lattice potential. Damping is significant for very shallow axial lattices (0.25 photon recoil energies), and ... More
Observation of Reduced Three-Body Recombination in a Fermionized 1D Bose GasNov 29 2003We investigate correlation properties of a one-dimensional interacting Bose gas by loading a magnetically trapped 87-Rb Bose-Einstein condensate into a deep two-dimensional optical lattice. We measure the three-body recombination rate for both the BEC ... More
Molecular orientational dynamics of the endohedral fullerene Sc$_{3}$N@C$_{80}$ as probed by $^{13}$C and $^{45}$Sc NMRApr 13 2006We measure 13C and 45Sc NMR lineshapes and spin-lattice relaxation times (T1) to probe the orientational dynamics of the endohedral metallofullerene Sc3N@C80. The measurements show an activated behavior for molecular reorientations over the full temperature ... More
Formulation of Free Higher Spin Supersymmetric Theories in SuperspaceJan 31 2005The N = 1 superfield formalism in four-dimensions is well formulated and understood, yet there remain unsolved problems. In this thesis, superfield actions for free massless and massive higher spin superfield theories are formulated in four dimensions. ... More
On a class of integrable interacting electronic systems with off-diagonal disorderMar 16 1995We report a class of {\it integrable} one-dimensional interacting electronic sy$ with {\it off-diagonal disorder}. For these systems, the disorder can be ``gauged away,''and the spectrum can be mapped completely onto the spectrum of the ordered problem, ... More
Supernovae and Light Neutralinos: SN1987A Bounds on Supersymmetry RevisitedApr 30 2003For non-universal gaugino masses, collider experiments do not provide any lower bound on the mass of the lightest neutralino. We review the supersymmetric parameter space which leads to light neutralinos, $M_\lsp \lsim {\cal O}(1\gev)$, and find that ... More
Bubble Nucleation on Nano- to Micro-size Cavities and Posts: An Experimental Validation of Classical TheorySep 06 2012Recently-reported data suggest that bubble nucleation on surfaces with nano-sized features (cavities and posts) may occur close to the thermodynamic saturation temperature. However, according to the traditional theory of heterogeneous bubble nucleation, ... More
Characteristic polynomials in real Ginibre ensemblesOct 08 2008Nov 10 2009We calculate the average of two characteristic polynomials for the real Ginibre ensemble of asymmetric random matrices, and its chiral counterpart. Considered as quadratic forms they determine a skew-symmetric kernel from which all complex eigenvalue ... More
The chiral Gaussian two-matrix ensemble of real asymmetric matricesNov 06 2009We solve a family of Gaussian two-matrix models with rectangular Nx(N+v) matrices, having real asymmetric matrix elements and depending on a non-Hermiticity parameter mu. Our model can be thought of as the chiral extension of the real Ginibre ensemble, ... More
Sphinx measurements of the 2009 solar minimum x-ray emissionMar 30 2012The SphinX X-ray spectrophotometer on the CORONAS-PHOTON spacecraft measured soft X-ray emission in the 1-15 keV energy range during the deep solar minimum of 2009 with a sensitivity much greater than GOES. Several intervals are identified when the X-ray ... More
Right product quasigroups and loopsMar 31 2009Apr 01 2009Right groups are direct products of right zero semigroups and groups and they play a significant role in the semilattice decomposition theory of semigroups. Right groups can be characterized as associative right quasigroups (magmas in which left translations ... More
Strongly right alternative rings and Bol loopsJul 30 2005We partially answer two questions of Goodaire by showing that in a finite, strongly right alternative ring, the set of units (if the ring is with unity) is a Bol loop under ring multiplication, and the set of quasiregular elements is a Bol loop under ... More
On Twisted Subgroups and Bol Loops of Odd OrderAug 29 2002May 04 2004In the spirit of Glauberman's fundamental work in B-loops and Moufang loops, we prove Cauchy and strong Lagrange theorems for Bol loops of odd order. We also establish necessary conditions for the existence of a simple Bol loop of odd order, conditions ... More
A Generalization of Moufang and Steiner LoopsMay 02 2001Nov 22 2001We study a variety of loops, RIF, which arise naturally from considering inner mapping groups, and a somewhat larger variety, ARIF. All Steiner and Moufang loops are RIF, and all flexible C-loops are ARIF. We show that all ARIF loops are diassociative, ... More
Diassociativity in Conjugacy Closed LoopsSep 20 2002Let $Q$ be a conjugacy closed loop, and $N(Q)$ its nucleus. Then $Z(N(Q))$ contains all associators of elements of $Q$. If in addition $Q$ is diassociative (i.e., an extra loop), then all these associators have order 2. If $Q$ is power-associative and ... More
Long-Wavelength Oscillations and the Gallex Solar Neutrino SignalJul 20 1992The recently reported solar neutrino signal in the $^{71}$Ga GALLEX detector adds a new dimension to the solar neutrino puzzle, complementing the previously known signals in $^{37}$Cl and water-Cherenkov detectors. Possible explanations for this new signal ... More
When is the commutant of a Bol loop a subloop?Jan 14 2006Aug 01 2006A left Bol loop is a loop satisfying $x(y(xz)) = (x(yx))z$. The commutant of a loop is the set of elements which commute with all elements of the loop. In a finite Bol loop of odd order or of order $2k$, $k$ odd, the commutant is a subloop. We investigate ... More
Every diassociative A-loop is MoufangJul 31 2000Aug 30 2000An A-loop is a loop in which every inner mapping is an automorphism. We settle a problem which had been open since 1956 by showing that every diassociative A-loop is Moufang.
Calibrating Type Ia Supernovae using the Planetary Nebula Luminosity Function I. Initial ResultsNov 07 2006We report the results of an [O III] lambda 5007 survey for planetary nebulae (PN) in five galaxies that were hosts of well-observed Type Ia supernovae: NGC 524, NGC 1316, NGC 1380, NGC 1448 and NGC 4526. The goals of this survey are to better quantify ... More
Creation of macroscopic superposition states from arrays of Bose-Einstein condensatesAug 30 2006We consider how macroscopic quantum superpositions may be created from arrays of Bose-Einstein condensates. We study a system of three condensates in Fock states, all with the same number of atoms and show that this has the form of a highly entangled ... More
C-loops: extensions and constructionsDec 19 2004C-loops are loops satisfying the identity $x(y\cdot yz) = (xy\cdot y)z$. We develop the theory of extensions of C-loops, and characterize all nuclear extensions provided the nucleus is an abelian group. C-loops with central squares have very transparent ... More
Electron-deuteron scattering in the equal-time formalism: beyond the impulse approximationNov 23 2004May 27 2005Using a three-dimensional formalism that includes relativistic kinematics, the effects of negative-energy states, approximate boosts of the two-body system, and current conservation, we calculate the electromagnetic form factors of the deuteron up to ... More
Electron-deuteron scattering in a current-conserving description of relativistic bound states: including meson-exchange-current contributionsJun 28 1999Using a three-dimensional formalism that includes relativistic kinematics, the effects of negative-energy states, approximate boosts of the two-body system, and current conservation we calculate the electromagnetic form factors of the deuteron up to $Q^2=6$ ... More
Finite Bruck LoopsJan 16 2004A loop $(X,\circ)$ is said to be a Bruck loop if it satisfies the (right) Bol identity $((z\circ x)\circ y)\circ x = z\circ ((x\circ y)\circ x)$ and the automorphic inverse property $(x\circ y)^{-1}=x^{-1}\circ y^{-1}$. If $X$ is a finite Bruck loop and ... More
F-quasigroups isotopic to groupsJan 04 2006In math.GR/0510298, we showed that every loop isotopic to an F-quasigroup is a Moufang loop. Here we characterize, via two simple identities, the class of F-quasigroups which are isotopic to groups. We call these quasigroups FG-quasigroups. We show that ... More
The Structure of F-QuasigroupsOct 14 2005Mar 16 2007We solve a problem of Belousov which has been open since 1967: to characterize the loop isotopes of F-quasigroups. We show that every F-quasigroup has a Moufang loop isotope which is a central product of its nucleus and Moufang center. We then use the ... More
Loops of Bol-Moufang type with a subgroup of index twoJun 05 2005We describe all constructions for loops of Bol-Moufang type analogous to the Chein construction $M(G,*,g_0)$ for Moufang loops.
Electron-deuteron scattering in a current-conserving description of relativistic bound states: formalism and impulse approximation calculationsFeb 23 1998The electromagnetic interactions of a relativistic two-body bound state are formulated in three dimensions using an equal-time (ET) formalism. This involves a systematic reduction of four-dimensional dynamics to a three-dimensional form by integrating ... More
Dense Antihydrogen: Its Production and Storage to Envision Antimatter PropulsionOct 13 2001Feb 28 2003We discuss the possibility that dense antihydrogen could provide a path towards a mechanism for a deep space propulsion system. We concentrate at first, as an example, on Bose-Einstein Condensate (BEC) antihydrogen. In a Bose-Einstein Condensate, matter ... More
The UNSW Extrasolar Planet Search: Methods and First Results from a Field Centred on NGC 6633Jan 14 2005Dec 02 2005We report on the current status of the University of New South Wales Extrasolar Planet Search project, giving details of the methods we use to obtain millimagnitude precision photometry using the 0.5m Automated Patrol Telescope. We use a novel observing ... More
Interplay between Coulomb-focusing and non-dipole effects in strong-field ionization with elliptical polarizationMar 09 2017Strong-field ionization and rescattering beyond the long-wavelength limit of the dipole approximation is studied with elliptically polarized mid-IR pulses. We have measured the full three-dimensional photoelectron momentum distributions (3D PMDs) with ... More
A Bose-Einstein condensate in an optical latticeJun 05 2002We have performed a number of experiments with a Bose-Einstein condensate (BEC) in a one dimensional optical lattice. Making use of the small momentum spread of a BEC and standard atom optics techniques a high level of coherent control over an artificial ... More
The first scientific experiment using Global e-VLBI observations: a multiwavelength campaign on the gamma-ray Narrow-Line Seyfert 1 PMN J0948+0022Dec 13 2010The detection of gamma-ray emission by Fermi-LAT from the radio loud Narrow Line Seyfert 1 PMN J0948+0022 (Abdo et al. 2009, ApJ 699, 976) triggered a multi-wavelength campaign between March and July 2009. Given its high compactness (Doi et al. 2006, ... More
VLBI Observations of SN 2009bbJun 10 2010Sep 27 2010We report on VLBI, as well as VLA radio observations of the Type Ib/c supernova 2009bb. The high radio luminosity of this supernova seems to require relativistic outflow, implying that the early radio emission was "engine-driven", that is driven by collimated ... More
Dynamics of axialized laser-cooled ions in a Penning trapOct 24 2007We report the experimental characterization of axialization - a method of reducing the magnetron motion of a small number of ions stored in a Penning trap. This is an important step in the investigation of the suitability of Penning traps for quantum ... More
Single Z Production at the TevatronMay 11 2012The production of single $Z$ bosons has been studied at Fermilab's Tevatron by the CDF and D0 collaborations. Measurements include the weak mixing angle, vector and axial-vector couplings between $Z$ bosons and light quarks, and angular coefficients in ... More
A Technique for Directly Measuring the Gravitational Acceleration of AntihydrogenDec 30 1994The gravitational force on antimatter has never been directly measured. A method is suggested for measuring the acceleration of antimatter $(\bar g)$ by measuring the deflection of a beam of neutral antihydrogen atoms in the Earth's gravitational field. ... More
Punctuated evolution of influenza virus hemagglutinin (A/H1N1) under opposing migration and vaccination pressuresSep 19 2012Influenza virus contains two highly variable envelope glycoproteins, hemagglutinin (HA) and neuraminidase (NA). The structure and properties of HA, which is responsible for binding the virus to the cell that is being infected, change significantly when ... More
Fractal Scaling of Cortical Matter, Amyloid Fragmentation and Plaque Formation across Rodents and PrimatesSep 26 2014Thermodynamic tools are well suited to connecting evolution of protein functionalities to mutations of amino acid sequences, especially for neuronal network structures. These tools enable one to quantify changes in modular structure and correlate them ... More
Hydroanalysis of Animal Lysozymes c and Human Defensins aAug 17 2008Proteins appear to be the most dramatic natural example of self-organized criticality (SOC), a concept that explains many otherwise apparently unlikely phenomena. Protein functionality is dominated by long range hydro(phobic/philic) interactions which ... More
Self-Organized Networks and Lattice Effects in High Temperature Superconductors III: Dopant Internal StructureNov 08 2006The self-organized dopant percolative filamentary model, entirely orbital in character (no fictive spins), predicted the existence and even the ~ 3 nm diameters of gap nanodomains (discovered by STM) that amazed almost all theorists in this field. Here ... More
Microscopic Reversibility, Space-Filling, and Internal Stress in Strong GlassesJun 15 2006The axiomatic theory of ideally glassy networks, which has proved effective in describing phase diagrams and many properties of chalcogenide, oxide, and even molecular glasses, is here broadened to describe both geometrical properties, such as the first ... More
Microscopic Spectral Model of High Temperature SuperconductorsDec 03 2005The self-organized dopant percolative filamentary model, entirely orbital in character (no spins), explains the evolution with doping of Fermi arcs observed by ARPES, including the abrupt transitions in quasiparticle strength observed near optimal doping ... More
Topological Theory of Electron-Phonon Interactions in High Temperature SuperconductorsAug 02 2004There are large isotope effects in the phonon kinks observed in photoemission spectra (ARPES) of optimally doped cuprate high temperature superconductors (HTSC), but they are quite different (Gweon et al. 2004) from those expected for a nearly free electron ... More
Network Topology and Subgap Resonances Observed by Fourier Transform Scanning Tunnelling Microscopy in Cuprate High-Temperature SuperconductorsApr 22 2003Fourier transform scanning tunneling microscopy on BSCCO subgap resonances has deciphered an octet of "quasi-particle" states that are consistent with the Fermi surface and energy gap observed by ARPES, but the origin of the high-intensity k-space octets ... More
Sliding charge density waves and zero-resistance states in GaAs/AlGaAs heterostructuresDec 17 2002Dec 19 2002Mani et al. have observed [1] zero-resistance states (ZRS) and energy gaps in a surprising setting: ultrahigh-mobility GaAs/AlGaAs heterostructures that contain a two dimensional electron Landau system (2DELS) exhibit vanishing diagonal resistance without ... More
Fractal Nature and Scaling Exponent of Non-Drude Currents in Non-Fermi LiquidsApr 05 2001In many oxides of the perovskite and pseudoperovskite families there are phase transitions between insulating and normal metallic (Fermi liquid) phases that are separated by an intermediate phase that is often called a non-Fermi liquid (NFL). The dc resistivity ... More
Autoantibody recognition mechanisms of MUC1Jun 21 2016The most cost-effective blood-based, noninvasive molecular cancer biomarkers are based on p53 epitopes and MUC1 tandem repeats. Here we use dimensionally compressed bioinformatic fractal scaling analysis to compare the two distinct and comparable probes, ... More
Similarity Is Not Enough: Tipping Points of Ebola Zaire MortalitiesNov 17 2014In early 2014 an outbreak of a slightly mutated Zaire Ebola subtype appeared in West Africa which is less virulent than 1976 and 1994 strains. The numbers of cases per year appear to be ~ 1000 times larger than the earlier strains, suggesting a greatly ... More
Thermodynamic Description of Beta Amyloid FormationOct 09 2013Mar 05 2014Protein function depends on both protein structure and amino acid (aa) sequence. Here we show that modular features of both structure and function can be quantified from the aa sequences alone for the small (40,42 aa) plaque-forming amyloid beta fragments. ... More
Self-Organized Criticality in Proteins: Hydropathic Roughening Profiles of G-Protein Coupled ReceptorsNov 18 2010Proteins appear to be the most dramatic natural example of self-organized criticality (SOC), a concept that explains many otherwise apparently unlikely phenomena. Protein conformational functionality is often dominated by long-range hydro(phobic/philic) ... More
Nonperturbative Topological Model of Synergistic Phase of 2D Electron Gas Induced by Microwave ExcitationFeb 04 2004The synergistic formation of ``zero'' (exponentially small or thermally activated) resistance states (ESRS) in high mobility two-dimensional electron systems (2DES) in a static magnetic field B and exposed to strong microwave radiation has attracted great ... More
New collective zero-resistance states in GaAs/AlGaAs heterostructuresMar 10 2003Exponentially small resistance in crossed static magnetic and microwave fields occurs in ultrapure two dimensional electron gases (2DEG), while in less pure systems the magnetoresistance oscillates but is always positive. A non-perturbative theory of ... More
Hydropathic evolution of hemagglutinin and neuraminidase glycoproteins of A(H1N1 and H3N2) virusesSep 26 2014More virulent strains of influenza virus subtypes H1N1 appeared in 2007 and H3N2 in 2011. The amino acid differences from prior less virulent strains appear to be small when tabulated through sequence alignments and counting site identities and similarities. ... More
A Cubic Equation of State for Amyloid Plaque FormationAug 26 2013Mar 05 2014Protein function depends on both protein structure and amino acid (aa) sequence. Here we show that modular features of both structure and function can be quantified from the aa sequence alone for the amyloid 770 aa precursor protein A4. Both the new second ... More
Self-Organized Criticality: A Prophetic Path to Curing CancerSep 28 2012While the concepts involved in Self-Organized Criticality have stimulated thousands of theoretical models, only recently have these models addressed problems of biological and clinical importance. Here we outline how SOC can be used to engineer hybrid ... More
Protein Adaptive Plasticity and Night VisionJan 14 2011Proteins appear to be the most dramatic natural example of self-organized network criticality (SONC), a concept that explains many otherwise apparently exponentially unlikely phenomena. Adaptive plasticity is a term which has become much more specific ... More
Microscopic Aspects of Stretched Exponential Relaxation (SER) in Homogeneous Molecular and Network Glasses and PolymersMay 04 2010Because the theory of SER is still a work in progress, the phenomenon itself can be said to be the oldest unsolved problem in science, as it started with Kohlrausch in 1847. Many electrical and optical phenomena exhibit SER with probe relaxation I(t) ... More
Prediction of High Transition Temperatures in Ceramic SuperconductorsMar 06 2009The prediction of transition temperatures can be regarded in several ways, either as an exacting test of theory, or as a tool for identifying theoretical rules for defining new homology models. Popular "first principle" methods for predicting transition ... More
Slow Dynamics in GlassesMay 18 2005Minimalist theories of complex systems are broadly of two kinds: mean-field and axiomatic. So far all theories of complex properties absent from simple systems and intrinsic to glasses are axiomatic. Stretched Exponential Relaxation (SER) is the prototypical ... More
Quantitative Molecular Scaling Theory of Protein Amino Acid Sequences, Structure, and FunctionalityOct 13 2016Here we review the development of protein scaling theory, starting from backgrounds in mathematics and statistical mechanics, and leading to biomedical applications. Evolution has organized each protein family in different ways, but scaling theory is ... More
Ultra long range plasmonic waveguides using quasi two dimensional metallic layersJan 22 2007We calculate the bound plasmonic modes of a quantum metamaterial slab, comprised of multiple quasi two dimensional electron gas (Q2DEG) layers, whose thickness is much smaller than the optical wavelength. For the first order transverse magnetic (TM) optical ... More
Hierarchical hydropathic evolution of influenza glycoproteins (N2, H3, A/H3N2) under relentless vaccination pressureMar 16 2013Hemagglutinin (HA) and neuraminidase (NA) are highly variable envelope glycoproteins. Here hydropathic analysis, previously applied to quantify common flu (H1N1) evolution (1934-), is applied to the evolution of less common but more virulent (avian derived) ... More
Punctuated evolution of influenza virus neuraminidase (A/H1N1) under migration and vaccination pressuresAug 30 2012Sep 13 2012Influenza virus contains two highly variable envelope glycoproteins, hemagglutinin (HA) and neuraminidase (NA). The structure and properties of HA, which is responsible for binding the virus to the cell that is being infected, change significantly when ... More
Frequency-Rank Correlations of Rhodopsin Mutations with Tuned Hydropathic Roughness Based on Self-Organized CriticalityJan 05 2012The behavior of disease-linked mutations of membrane proteins is especially simple in rhodopsin, where they are well-studied, as they are responsible for retinitis pigmentosa, RP (retinal degeneration). Here we show that the frequency of occurrence of ... More
Microscopic Aspects of Stretched Exponential Relaxation (SER)Mar 05 2009The Scher-Lax-Phillips (SLP) universal minimalist model quantitatively explains stretching fractions beta(Tg) for a wide variety of relaxation experiments (nearly 50 altogether) on electronic and molecular glasses and deeply supercooled liquids by assuming ... More
Functionality and Protein-Water InteractionsMar 02 2008The structures of proteins exhibit secondary elements composed of helices and loops. Comparison of several water-only hydrophobicity scales with the functionalities of two repeat proteins shows that these secondary elements possess water-induced medium-range ... More
Protein Sequence, Structure, Stability and FunctionalityFeb 25 2008Protein-protein interactions (protein functionalities) are mediated by water, which compacts individual proteins and promotes close and temporarily stable large-area protein-protein interfaces. Proteins are peptide chains decorated by amino acids, and ... More
Strong Disorder and High Temperature SuperconductivityJul 31 2006ARPES and wide area, high resolution STM studies of a micaceous cuprate high temperature superconductor have shown strong nanoscale gap disorder, but the question of whether this disorder is intrinsic and necessary for HTSC, or merely incidental to either ... More