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Last update: November 12, 2013.

1

ERIC Educational Resources Information Center

|This theme issue on anomalies includes Web sites, CD-ROMs and software, videos, books, and additional resources for elementary and junior high school students. Pertinent activities are suggested, and sidebars discuss UFOs, animal anomalies, and anomalies from nature; and resources covering unexplained phenonmenas like crop circles, Easter Island,…

Online-Offline, 1999

1999-01-01

2

Anomalies have a diverse impact on many aspects of physical phenomena. The role of anomalies in determining physical structure from the amplitude for decay to the foundations of superstring theory will be reviewed. 36 refs.

Bardeen, W.A.

1985-08-01

3

NASA Astrophysics Data System (ADS)

A method is presented for the estimation of a global gravity anomaly field using the combination of satellite-derived potential coefficient models and the coefficients implied by the Airy-Heiskanen topographic/isostatic potential (Rummel et al., 1988) from topographic models with a 30-km depth of compensation. Gravity anomalies calculated with this method are compared with a terrestrial 1 x 1 degree anomaly file where the anomaly standard deviations were less than 10 mgals. Using the GEM T1 model (Marsh et al., 1988) to degree 36, the rms anomaly discrepency was + or - 19 mgals, while the rms values for the terrestrial anomalies was + or - 28 mgals.

Rapp, Richard H.; Pavlis, Nikolaos

4

Aims: To describe genetic, clinical, anthropometric and radiological characteristics of 22 children with SHOX gene anomalies and familial short stature suggestive of Léri-Weill dyschondrosteosis. Methods: Monocentric retrospective observational study. Results: Six children (27%) presented with deletions located downstream of SHOX (mean height –1.4 ± 0.9 SDS) and 16 (68%) with either deletions encompassing SHOX, intragenic deletions or point mutations of

Anne-Sophie Salmon-Musial; Myriam Rosilio; Michel David; Céline Huber; Emmanuel Pichot; Valérie Cormier-Daire; Marc Nicolino

2011-01-01

5

Random matrix model at nonzero chemical potentials with anomaly effects

NASA Astrophysics Data System (ADS)

Phase diagram of the chiral random matrix model with U(1)A breaking term is studied with the quark chemical potentials varied independently at zero temperature by taking the chiral and meson condensates as the order parameters. Although, without the U(1)A breaking term, chiral transition of each flavor can happen separately responding to its chemical potential, the U(1)A breaking terms mix the chiral condensates and correlate the phase transitions. In the three-flavor case, we find that there are mixings between the meson and chiral condensates due to the U(1)A anomaly, which makes the meson condensed phase more stable. Increasing the hypercharge chemical potential (?Y) with the isospin and quark chemical potentials (?I,?q) kept small, we observe that the kaon-condensed phase becomes the ground state and at the larger ?Y the pion-condensed phase appears unexpectedly, which is caused by the competition between the chiral restoration and the meson condensation. The similar happens when ?Y and ?I are exchanged, and the kaon-condensed phase becomes the ground state at larger ?I below the full chiral restoration.

Fujii, H.; Sano, T.

2011-01-01

6

Gravity Potential anomalies on Mars : Shape of the planet and its thermal evolution

NASA Astrophysics Data System (ADS)

This study follows previous studies about the existence of paleo shorelines on the surface of Mars (Parker, 1993, Clifford and Parker, 2001). In order to test this hypothesis, we have computed the gravity potential of the shorelines since shorelines should represent equipotential lines at the solid surface of the planet. For the so-called Deuteronilus shoreline, we find that the potential varies with longitude with an order 2. We propose to interpret this order 2 as related to the formation of Tharsis, which makes the shape of the planet close to that of a 3 dimensional ellipsoid. The potential calculated by the spherical harmonic decomposition (SHD) up to degree 2 is close to the SHD up to degree 60. We are exploring the values of J22 which would give a constant potential along that shoreline, assuming that the moment of inertia, the rotation and the volume of the planet remained constant. The results suggest that this equipotential would have formed as Tharsis was being built up during the Hesperian. Another way to test the shoreline hypothesis is to use the first data of Mars Express spectrometer. In a joint study (Sotin et al.), we plan to analyse the OMEGA spectra to identify sedimentary deposits, carbonates or evaporites in the Deuteronilus shoreline region. In parallel, we run numerical experiments describing thermal convection in 3D spherical shells. The code takes into account large viscosity gradients due to temperature variations. Convection occurs in the so-called conductive lid regime. First results suggest that the geometry of the convection is mainly controlled by the formation of one large plume. Temperature variations in latitude, longitude and depth are transformed into density variations that are used to compute both dynamic topography and gravity anomalies. A comparison between observed and computed gravity anomalies will be performed to interpret some of the large scale gravity potential variations.

Couturier, F.; Choblet, G.; Sotin, C.

7

NASA Astrophysics Data System (ADS)

If equatorial sediments form characteristic deposits around the equator, they may help to resolve the amount of northwards drift of the Pacific tectonic plate. Relevant to this issue, it has been shown that 230Th has been accumulating on the equatorial seabed faster than its production from radioactive decay in the overlying water column during the Holocene (Marcantonio et al. in Paleoceanography 16:260-267, 2001). Some researchers have argued that this reflects the deposition of particles with adsorbed 230Th carried by bottom currents towards the equator ("focusing"). If correct, this effect may combine with high pelagic productivity, which is also centered on the equator, to yield a characteristic signature of high accumulation rates marking the paleoequator in older deposits. Here we evaluate potential evidence that such an equatorial feature existed in the geological past. Seismic reflection data from seven meridional transects suggest that a band of equatorially enhanced accumulation of restricted latitude was variably developed, both spatially and temporally. It is absent in the interval 14.25-20.1 Ma but is well developed for the interval 8.55-14.25 Ma. We also examined eolian dust accumulation rate histories generated from scientific drilling data. A dust accumulation rate anomaly near the modern equator, which is not obviously related to the inter-tropical convergence zone, is interpreted as caused by focusing. Accumulation rates of Ba and P2O5 (proxies of export production) reveal a static equatorial signature, which suggests that the movement of the Pacific plate over the period 10-25 Ma was modest. The general transition from missing to well-developed focusing signatures around 14.25 Ma in the seismic data coincides with the mid-Miocene development of the western boundary current off New Zealand. This current supplies the Pacific with deep water from Antarctica, and could therefore imply a potential paleoceanographic or paleoclimatic origin. At 10.05-14.25 Ma, the latitudes of the seismic anomalies are up to ~2° different from the paleoequator predicted by Pacific plate-hotspot models, suggesting potentially a small change in the hotspot latitudes relative to the present day (although this inference depends on the precise form of the deposition around the equator). The Ba and P2O5 anomalies, on the other hand, are broadly compatible with plate models predicting slow northward plate movement over 10-25 Ma.

Mitchell, Neil C.; Dubois, Nathalie

2013-09-01

8

Nonrelativistic inverse square potential, scale anomaly, and complex extension

The old problem of a singular, inverse square potential in nonrelativistic quantum mechanics is treated employing a field-theoretic, functional renormalization method. An emergent contact coupling flows to a fixed point or develops a limit cycle depending on the discriminant of its quadratic beta function. We analyze the fixed points in both conformal and nonconformal phases and perform a natural extension of the renormalization group analysis to complex values of the contact coupling. Physical interpretation and motivation for this extension is the presence of an inelastic scattering channel in two-body collisions. We present a geometric description of the complex generalization by considering renormalization group flows on the Riemann sphere. Finally, using bosonization, we find an analytical solution of the extended renormalization group flow equations, constituting the main result of our work.

Moroz, Sergej [Institut fuer Theoretische Physik Universitaet Heidelberg, Philosophenweg 16, D-69120 Heidelberg (Germany)], E-mail: s.moroz@thphys.uni-heidelberg.de; Schmidt, Richard [Physik Department, Technische Universitaet Muenchen, James-Franck-Strasse, D-85748 Garching (Germany)

2010-02-15

9

Remote energetic neutral atom imaging of electric potential over a lunar magnetic anomaly

NASA Astrophysics Data System (ADS)