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1

The term "frustration" in the context of magnetism was originally used by P. W. Anderson and quickly adopted for application to the description of spin glasses and later to very special lattice types, such as the kagomé. The original use of the term was to describe systems with competing antiferromagnetic interactions and is important in current condensed matter physics in areas such as the description of emergent magnetic monopoles in spin ice. Within molecular magnetism, at least two very different definitions of frustration are used. Here we report the synthesis and characterization of unusual nine-metal rings, using magnetic measurements and inelastic neutron scattering, supported by density functional theory calculations. These compounds show different electronic/magnetic structures caused by frustration, and the findings lead us to propose a classification for frustration within molecular magnets that encompasses and clarifies all previous definitions. PMID:23132941

Baker, Michael L; Timco, Grigore A; Piligkos, Stergios; Mathieson, Jennifer S; Mutka, Hannu; Tuna, Floriana; Kozlowski, Piotr; Antkowiak, Michal; Guidi, Tatiana; Gupta, Tulika; Rath, Harapriya; Woolfson, Robert J; Kamieniarz, Grzegorz; Pritchard, Robin G; Weihe, Høgni; Cronin, Leroy; Rajaraman, Gopalan; Collison, David; McInnes, Eric J L; Winpenny, Richard E P

2012-11-20

2

In clinical studies, the relative likelihood of an event occurring between 2 groups is often expressed as the risk ratio (RR) or the odds ratio (OR). The RR is an intuitive parameter that is relatively easy to interpret. Quantitative interpretation of an OR is much more difficult and is often incorrectly equated to that of an RR. The problem is that OR may differ substantially from RR, especially when the outcome of interest is common in the study population. This article explains and clarifies controversial issues surrounding the use and interpretation of the OR. Theoretical concepts relating to ORs are illustrated by examples from the surgical literature. By reviewing articles from 5 surgical journals over a 5-year period, we show that the OR is often presented and misinterpreted as equivalent to the RR. When the discrepancy is large, using OR uncritically as an estimate of RR will strongly bias inferences about treatment effect or cause of disease by amplifying the apparent strength of an association between an exposure and an outcome.

Montreuil, Bernard; Bendavid, Yves; Brophy, James

2005-01-01

3

NSDL National Science Digital Library

Students can use this interactive Flash applet to practice identifying odd and even numbers. The applet displays a Venn diagram with two loops and a set of number tiles. Users sort the numbers into the correct loops with regard to parity and then check their work. Users can choose to sort numbers in three ranges: 1 to 10, 1 to 30, or 1-100.

Bunker, Dan

2010-01-01

4

Experimental and theoretical studies of odd-odd deformed nuclei

The application of a simple semi-empirical model is discussed in terms of interpreting experimental nuclear structure data for twelve of the best characterized odd-odd deformed nuclei. An essential part of this modeling is to calculate values for the Gallagher-Moszkowski splitting and Newby shifts, the observables that arise from the n-p residual interaction in odd-odd nuclei. Assumptions regarding the form for

Hoff

1989-01-01

5

NSDL National Science Digital Library

This variation of Tic Tac Toe develops students' strategic thinking. Two players, one using 1s and the other using 0s, take turns entering their numbers into the cells of a 3 by 3 grid. The winner is the first to complete three in a row with an odd sum. The game can be played on paper with a friend or against the computer with the interactive applet. The interactive version allows a user to choose which number to play with and whether to go first or second, providing an opportunity to refine strategy by reflecting on how these choices affect the outcome.

2000-03-01

6

Against the Odds Exhibition Opens

... Issue Past Issues Special Section Against the Odds Exhibition Opens Past Issues / Spring 2008 Table of Contents / ... April 17, Dr. Donald Lindberg officially opened the exhibition, "Against the Odds: Making a Difference in Global ...

7

Extremal Myers-Perry Black Holes Coupled to Born-Infeld Electrodynamics in Odd Dimensions

NASA Astrophysics Data System (ADS)

Employing higher-order perturbation theory, we find a new class of perturbative extremal rotating black hole solutions with Born-Infeld electric charge in odd D dimensional spacetime. The seed solution is an odd-dimensional extremal Myers-Perry black hole with equal angular momenta to which a perturbative, nonlinear, electric Born-Infeld field charge q is added maintaining the extremality condition. The perturbations are performed up to third-order. We also study some physical properties of these black holes. In particular, it is shown that the values of the gyromagnetic ratio of the black holes are modified by the perturbative parameter q and the Born-Infeld parameter ?.

Allaverdizadeh, Masoud; Hendi, Seyed H.; Lemos, José P. S.; Sheykhi, Ahmad

2014-04-01

8

We investigate the point-parity and mirror-parity handedness of the large angle anisotropy in the cosmic microwave background (CMB). In particular we consider whether the observed low CMB quadrupole could more generally signal odd point-parity, i.e., suppression of even multipoles. Even though this feature is 'visually' present in most renditions of the WMAP dataset we find that it never supports parity preference beyond the meagre 95% confidence level. This is fortunate as point-parity handedness implies almost certainly a high level of galactic contamination. Mirror reflection parity, on the contrary, is related to the emergence of a preferred axis, defining the symmetry plane. We use this technique to make contact with recent claims for an anisotropic Universe, showing that the detected preferred axis is associated with positive (even) mirror parity. This feature may be an important clue in identifying the culprit for this unexpected signal.

Land, Kate [Theoretical Physics Group, Imperial College, Prince Consort Road, London SW7 2BZ (United Kingdom); Magueijo, Joao [Perimeter Institute for Theoretical Physics, 31 Caroline St. N., Waterloo, N2L 2Y5 (Canada); Theoretical Physics Group, Imperial College, Prince Consort Road, London SW7 2BZ (United Kingdom)

2005-11-15

9

Time-odd mean fields in covariant density functional theory: Rotating systems

Time-odd mean fields (nuclear magnetism) and their impact on physical observables in rotating nuclei are studied in the framework of covariant density functional theory (CDFT). It is shown that they have profound effect on the dynamic and kinematic moments of inertia. Particle number, configuration, and rotational frequency dependencies of their impact on the moments of inertia have been analyzed in a systematic way. Nuclear magnetism can also considerably modify the band crossing features such as crossing frequencies and the properties of the kinematic and dynamic moments of inertia in the band crossing region. The impact of time-odd mean fields on the moments of inertia in the regions away from band crossing only weakly depends on the relativistic mean-field parametrization, reflecting good localization of the properties of time-odd mean fields in CDFT. The moments of inertia of normal-deformed nuclei considerably deviate from the rigid-body value. On the contrary, superdeformed and hyperdeformed nuclei have the moments of inertia which are close to rigid-body value. The structure of the currents in rotating frame, their microscopic origin, and the relations to the moments of inertia have been systematically analyzed. The phenomenon of signature separation in odd-odd nuclei, induced by time-odd mean fields, has been analyzed in detail.

Afanasjev, A. V.; Abusara, H. [Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762 (United States)

2010-09-15

10

Flavor Dependence of T-odd PDFs

The flavor dependence of the naive time reversal odd ("T-odd'') parton distributions for $u$- and $d$-quarks are explored in the spectator model. The flavor dependence of $h_{1}^{\\perp}$ is of significance for the analysis of the azimuthal $\\cos(2\\phi)$ asymmetries in unpolarized SIDIS and DY-processes, as well as for the overall physical understanding of the distribution of transversely polarized quarks in unpolarized nucleons. As a by-product of the formalism, we calculate the chiral-odd but ``T-even'' function $h_{1L}^{\\perp}$ which enables us to present a prediction for the single spin asymmetry $A_{UL}^{\\sin(2\\phi)}$ for a longitudinally polarized target in SIDIS.

Leonard P. Gamberg; Gary R. Goldstein; Marc Schlegel

2007-04-20

11

ERIC Educational Resources Information Center

Presents a collection of curious findings from one of the first textbooks studied, a 1958 edition of a fairly popular text. Concludes that the book presents a chance for teachers to enrich their physics classes. (CCM)

Korsunsky, Boris

2000-01-01

12

The Wigner caustic on shell and singularities of odd functions

NASA Astrophysics Data System (ADS)

We study the Wigner caustic on shell of a Lagrangian submanifold L of affine symplectic space. We present the physical motivation for studying singularities of the Wigner caustic on shell and present its mathematical definition in terms of a generating family. Because such a generating family is an odd deformation of an odd function, we study simple singularities in the category of odd functions and their odd versal deformations, applying these results to classify the singularities of the Wigner caustic on shell, interpreting these singularities in terms of the local geometry of L.

Domitrz, Wojciech; Manoel, Miriam; Rios, Pedro de M.

2013-09-01

13

High-spin states in odd-odd nuclei

High-spin states in doubly odd nuclei of 124Cs, 126Cs and 124La have been investigated by gamma ray spectroscopy. Rotational bands of pi h11\\/2 ? nuh11\\/2 configuration have been assigned by the blocking argument on the first band crossing frequencies for neighboring odd-A nuclei. In cesium isotopes, the signature inversion of quasiparticle routhians has been observed. The spin of the band

T. Komatsubara; K. Furuno; T. Hosoda; J. Mukai; T. Hayakawa; T. Morikawa; Y. Iwata; N. Kato; J. Espmo; J. Gascon; N. Gjørup; G. B. Hagemann; H. J. Jensen; D. Jerrestam; J. Nyberg; G. Sletten; B. Cederwall; P. O. Tjøm

1993-01-01

14

Simultaneous Description of Even-Even, Odd-Mass and Odd-Odd Nuclear Spectra

NASA Astrophysics Data System (ADS)

The orthosymplectic extension of the Interacting Vector Boson Model (IVBM) is used for the simultaneous description of the spectra of different families of neighboring heavy nuclei. The structure of even-even nuclei is used as a core on which the collective excitations of the neighboring odd-mass and odd-odd nuclei are built on. Hence, the spectra of the odd-mass and odd-odd nuclei arise as a result of the consequent and self-consistent coupling of the fermion degrees of freedom of the odd particles, specified by the fermion sector SOF(2?)?OSp(2?/12, R), to the boson core which states belong to an SpB(12, R) irreducible representation. The theoretical predictions for different low-lying collective bands with positive and negative parity for two sets of neighboring nuclei with distinct collective properties are compared with experiment and IBM/IBFM/IBFFM predictions. The obtained results reveal the applicability of the used dynamical symmetry of the model.

Ganev, H. G.; Georgieva, A. I.

2010-01-01

15

Enhanced T-odd, P-odd electromagnetic moments in reflection asymmetric nuclei

Collective P- and T-odd moments produced by parity and time invariance violating forces in reflection asymmetric nuclei are considered. The enhanced collective Schiff, electric dipole, and octupole moments appear due to the mixing of rotational levels of opposite parity. These moments can exceed single-particle moments by more than 2 orders of magnitude. The enhancement is due to the collective nature of the intrinsic moments and the small energy separation between members of parity doublets. In turn these nuclear moments induce enhanced T- and P-odd effects in atoms and molecules. A simple estimate is given and a detailed theoretical treatment of the collective T-, P-odd electric moments in reflection asymmetric, odd-mass nuclei is presented. In the present work we improve on the simple liquid drop model by evaluating the Strutinsky shell correction and include corrections due to pairing. Calculations are performed for octupole deformed long-lived odd-mass isotopes of Rn, Fr, Ra, Ac, and Pa and the corresponding atoms. Experiments with such atoms may improve substantially the limits on time reversal violation. {copyright} {ital 1997} {ital The American Physical Society}

Spevak, V.; Auerbach, N. [School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel)] [School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel); Flambaum, V.V. [School of Physics, University of New South Wales, Sydney, 2052, NSW (Australia)] [School of Physics, University of New South Wales, Sydney, 2052, NSW (Australia)

1997-09-01

16

Shape Coexistence In Odd And Odd-Odd Nuclei In The A~100 Region

NASA Astrophysics Data System (ADS)

In the even-even nuclei around A=100 a transition from spherical to deformed shapes occurs from N =58 to N=60. The isotones with N=59 are of special interest, because they are just at the border between the two regions. Very recently, we have studied odd-neutrons and odd-odd nuclei with N=59, by means of prompt ?-ray spectroscopy of the spontaneous fission of 248Cm, using the EUROGAM 2 multi-detector, and by measurements of ?s isomers produced by fission of 239,241Pu with thermal neutrons at ILL (Grenoble). In the latter case, the detection is based on time correlation measurements between fission fragments detected by the LOHENGRIN mass spectrometer and ?-rays or conversion electrons from the isomer decay. It was found that three shapes coexist in the odd 97Sr and 99Zr and two shapes coexist in the odd-odd 96Rb. A simple explanation of the shape-coexistence mechanism is proposed. It is based upon the Nilsson diagram and stresses the fundamental importance of the unique parity states.

Pinston, J. A.; Genevey, J.; Simpson, G.; Urban, W.

2005-11-01

17

Fermion zero modes in odd dimensions

NASA Astrophysics Data System (ADS)

We study the zero modes of the Abelian Dirac operator in any odd dimension. We use the stereographic projection between a (2n - 1)-dimensional space and a (2n - 1) sphere embedded in a 2n-dimensional space. It is shown that the Dirac operator with a gauge field of uniform field strengths in S2n - 1 has symmetries of SU(n) × U(1) which is a subgroup of SO(2n). Using the group representation theory, we obtain the number of fermion zero modes, as well as their explicit forms, in a simple way.

Min, Hyunsoo

2010-03-01

18

NASA Astrophysics Data System (ADS)

The Odd Quantum is aiming to be odd. Falling between being a quantum mechanics textbook and a `popular' science book, it aims to convey something of the substance of quantum mechanics without being overly technical or professional. It does not shy away from the mathematics of the subject or resort solely to analogy and metaphor, as so often is the case. Books aimed at the lay reader tend to take on a particular aspect of quantum mechanics, for example, wave-particle duality, and can do little more than hint at the complexity of the subject. This book is more than a textbook on quantum mechanics; it gives the reader a comprehensive account of history and an appreciation of the nature of quantum mechanics. The introductory chapters deal with the earlier part of the century and the thinking of that time. The approach is familiar, as are the stories that Treiman tells, but he also manages to convey the speed with which ideas changed and the excitement this brought to the physics community. Classical ideas of force and energy are dealt with succinctly but with sufficient depth to set up the reader for what is to come; Maxwell's equations and a brief glimpse at relativity are included. This is followed by a brief description of what the author terms the `old' quantum mechanics, in effect a highly readable tour around black body radiation and spectroscopy and the models of the atom that emerged from them. The `new' quantum mechanics begins about a third of the way through the book, and in a chapter entitled `Foundations' starts gently but rapidly moves into a detailed mathematical treatment. This section, of necessity, relapses into the style of a textbook and covers a lot of ground quickly. It is at this point that the non-specialist popular science readers for whom Treiman has written this book may become a little bemused. Concepts such as non-degeneracy and operators come thick and fast. It is difficult to imagine an educated non-physicist with little mathematical ability keeping track of the equations and their meaning. However, the text continues to be accessible and moves swiftly from `quantum classics' such as the harmonic oscillator to electrical conductivity and the collapse of stars. Reassuringly, Treiman takes time out to ask `What's going on?' where he considers the question of how probabilities get converted into `facts' when things are measured. His own fascination with the subject comes through as he considers the different interpretations of quantum mechanics. The chapter on `building blocks' starts in 1932 when ` ... it could seem that all the basic building blocks of the whole world were at last in hand'. Swiftly and succinctly it moves through to the standard model, acknowledging that a closer look would ` ... quickly carry us far afield into highly technical thickets'. The final chapter tackles the more difficult subject of quantum field theory. This is a very swift journey through quantum electrodynamics and quantum chromodynamics. It is the final summary that stands out, however. The author reminds us what to marvel about: the miracles of quantum theory that are ` ... outrageous to common sense and intuition'. This is a useful book for any science department. It will be of particular use to those of us who studied the subject some time ago and who need to refresh their memories, for example teachers of A-level physics. The asides about `what is going on' and the history that is included make it a `book' rather than a `textbook'. First-year undergraduates, or just possibly motivated and mathematically able A-level students, would also benefit. Beware, however. The mathematics is not trivial and you would arguably need to have met it before in order to cope. Although the book occasionally relapses into textbook style you are left with a sense of the wonder of the subject and an appreciation of the beauty of the mathematics that underpins it.

Reynolds, Helen

2000-03-01

19

Supernova electron capture rates on odd-odd nuclei

NASA Astrophysics Data System (ADS)

At densities between 108 and 1010 g/cm3 electron capture in a presupernova collapse is believed to mainly occur on odd-odd nuclei. We have derived the rates for six of the most important electron capturing nuclei, 54,56,58Mn and 56,58,60Co, based on calculations of the Gamow-Teller strength distributions for the ground states and first excited states. These calculations have been performed by shell model diagonalization in the pf shell using a recently modified version of the KB3 interaction. The shell model rates are noticeably smaller than the presently adopted rates as the latter have been derived by placing the Gamow-Teller (GT) resonance at too low excitation energies.

Langanke, K.; Martínez-Pinedo, G.

1999-05-01

20

Soil clay content underlies prion infection odds

Environmental factors-especially soil properties-have been suggested as potentially important in the transmission of infectious prion diseases. Because binding to montmorillonite (an aluminosilicate clay mineral) or clay-enriched soils had been shown to enhance experimental prion transmissibility, we hypothesized that prion transmission among mule deer might also be enhanced in ranges with relatively high soil clay content. In this study, we report apparent influences of soil clay content on the odds of prion infection in free-ranging deer. Analysis of data from prion-infected deer herds in northern Colorado, USA, revealed that a 1% increase in the clay-sized particle content in soils within the approximate home range of an individual deer increased its odds of infection by up to 8.9%. Our findings suggest that soil clay content and related environmental properties deserve greater attention in assessing risks of prion disease outbreaks and prospects for their control in both natural and production settings. ?? 2011 Macmillan Publishers Limited. All rights reserved.

David, Walter, W.; Walsh, D. P.; Farnsworth, M. L.; Winkelman, D. L.; Miller, M. W.

2011-01-01

21

Soil clay content underlies prion infection odds.

Environmental factors-especially soil properties-have been suggested as potentially important in the transmission of infectious prion diseases. Because binding to montmorillonite (an aluminosilicate clay mineral) or clay-enriched soils had been shown to enhance experimental prion transmissibility, we hypothesized that prion transmission among mule deer might also be enhanced in ranges with relatively high soil clay content. In this study, we report apparent influences of soil clay content on the odds of prion infection in free-ranging deer. Analysis of data from prion-infected deer herds in northern Colorado, USA, revealed that a 1% increase in the clay-sized particle content in soils within the approximate home range of an individual deer increased its odds of infection by up to 8.9%. Our findings suggest that soil clay content and related environmental properties deserve greater attention in assessing risks of prion disease outbreaks and prospects for their control in both natural and production settings. PMID:21326232

David Walter, W; Walsh, Daniel P; Farnsworth, Matthew L; Winkelman, Dana L; Miller, Michael W

2011-01-01

22

Photon scattering experiments on the quasistable, odd-odd mass nucleus {sup 176}Lu

The quasistable odd-odd-mass nucleus {sup 176}Lu is of special interest in nuclear structure physics and, above all, in nuclear astrophysics. Systematic photon scattering experiments have been performed at the bremsstrahlung facility of the 4.3-MV Stuttgart Dynamitron accelerator with bremsstrahlung end-point energies of 2.3 and 3.1 MeV to determine the low-energy dipole strength distribution in the s-only isotope {sup 176}Lu. The main goal was to pin down possible intermediate states (IS) for the photoactivation of the short-lived 123-keV isomer, which is the key process determining the effective lifetime of {sup 176}Lu in a stellar photon bath and hence for the use of this isotope as a stellar chronometer. Using an enriched sample, 29 transitions ascribed to {sup 176}Lu were detected below 2.9-MeV excitation energy. The corresponding excitation strengths were determined. For the previously proposed lowest IS at 839 keV, an upper limit for the excitation strength corresponding to a lifetime of {tau}{>=} 1.5 ps can be given. Astrophysical consequences, also in view of new Stuttgart photoactivation experiments, are discussed. The fragmentation of the dipole strength is compared to those in neighboring even-even and odd-even nuclei.

Walter, S.; Stedile, F.; Garrel, H. von; Kneissl, U.; Kohstall, C.; Pitz, H. H.; Scheck, M. [Institut fuer Strahlenphysik, Universitaet Stuttgart, D-70569 Stuttgart (Germany); Carroll, J. J. [Department of Physics and Astronomy, Youngstown State University, Youngstown, Ohio 44555 (United States); Fransen, C.; Friessner, G.; Hollmann, N.; Jolie, J.; Linnemann, A.; Muecher, D.; Scholl, C.; Werner, V. [Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany); Karg, O.; Neumann-Cosel, P. von; Pietralla, N. [Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany); Kaeppeler, F. [Institut fuer Kernphysik, Forschungszentrum Karlsruhe, D-76021 Karlsruhe (Germany)] (and others)

2007-03-15

23

Dichotomous transformations for statistical inference about odds ratios

Dichotomous transformations for continuous outcomes are commonly used. In this paper, we investigate dichotomisation for statistical inference about odds ratios in a situation where two underlying distributions from which independent samples are drawn are skewed and unknown. Under some mild conditions it is shown that a suitable choice of the cutpoint of a dichotomous transformation must lie within the range

Xiangning Huang; Baibing Li

2009-01-01

24

Extremal charged rotating dilaton black holes in odd dimensions

Employing higher-order perturbation theory, we find a new class of charged rotating black hole solutions of Einstein-Maxwell-dilaton theory with general dilaton coupling constant. Starting from the Myers-Perry solutions, we use the electric charge as the perturbative parameter, and focus on extremal black holes with equal-magnitude angular momenta in odd dimensions. We perform the perturbations up to 4th order for black holes in 5 dimensions and up to 3rd order in higher odd dimensions. We calculate the physical properties of these black holes and study their dependence on the charge and the dilaton coupling constant.

Allahverdizadeh, Masoud; Kunz, Jutta; Navarro-Lerida, Francisco [Institut fuer Physik, Universitaet Oldenburg, Postfach 2503 D-26111 Oldenburg (Germany); Departamento de Fisica Atomica, Molecular y Nuclear, Ciencias Fisicas Universidad Complutense de Madrid, E-28040 Madrid (Spain)

2010-09-15

25

General parity-odd CMB bispectrum estimation

NASA Astrophysics Data System (ADS)

We develop a methodology for estimating parity-odd bispectra in the cosmic microwave background (CMB). This is achieved through the extension of the original separable modal methodology to parity-odd bispectrum domains (l1+l2+l3 = odd). Through numerical tests of the parity-odd modal decomposition with some theoretical bispectrum templates, we verify that the parity-odd modal methodology can successfully reproduce the CMB bispectrum, without numerical instabilities. We also present simulated non-Gaussian maps produced by modal-decomposed parity-odd bispectra, and show the consistency with the exact results. Our new methodology is applicable to all types of parity-odd temperature and polarization bispectra.

Shiraishi, Maresuke; Liguori, Michele; Fergusson, James R.

2014-05-01

26

On stability of odd-frequency superconducting state

Odd-frequency pairing mechanism has been investigated for several decades. Nevertheless the properties of such superconducting phase as well as its thermodynamic stability have remained unclear. In particular it has been argued by numerous authors that the odd-frequency state is thermodynamically unstable, has an unphysical Meissner effect (at least within the mean-field approximation), and therefore can not exist as a homogeneous phase in equilibrium physical systems. We argue that such a conclusion is incorrect because it relies on an inappropriate assumption that the odd-frequency superconductor can be described by an effective Hamiltonian that breaks the U(l) symmetry. We show that the odd-frequency state can be appropriately formulated within the functional integral representation by using the effective action to describe such a superconducting state within the mean field approximation. We find that the odd-frequency superconductor is thermodynamically stable and exhibits ordinary Meissner effect, and therefore, in principle, it can be realized in equilibrium solid state systems.

Lenov, Bmitry [Los Alamos National Laboratory; Martin, Ivar [Los Alamos National Laboratory; Mozyrsky, Dima [Los Alamos National Laboratory

2008-01-01

27

Investigation of Cool and Hot Executive Function in ODD/CD Independently of ADHD

ERIC Educational Resources Information Center

Background: Children with oppositional defiant disorder/conduct disorder (ODD/CD) have shown deficits in "cool" abstract-cognitive, and "hot" reward-related executive function (EF) tasks. However, it is currently unclear to what extent ODD/CD is associated with neuropsychological deficits, independently of attention deficit hyperactivity disorder…

Hobson, Christopher W.; Scott, Stephen; Rubia, Katya

2011-01-01

28

Topology Explains Why Automobile Sunshades Fold Oddly

ERIC Educational Resources Information Center

Automobile sunshades always fold into an "odd" number of loops. The explanation why involves elementary topology (braid theory and linking number, both explained in detail here with definitions and examples), and an elementary fact from algebra about symmetric group.

Feist, Curtis; Naimi, Ramin

2009-01-01

29

Extremal charged rotating black holes in odd dimensions

Employing higher order perturbation theory, we obtain charged rotating black holes in odd dimensions, where the Einstein-Maxwell Lagrangian may be supplemented with a Chern-Simons term. Starting from the Myers-Perry solutions, we use the electric charge as the perturbative parameter and focus on extremal black holes with equal-magnitude angular momenta. For Einstein-Maxwell-Chern-Simons theory with arbitrary Chern-Simons coupling constant, we perform the perturbations up to 3rd order for any odd dimension. We discuss the physical properties of these black holes and study their dependence on the charge. In particular, we show that the gyromagnetic ratio g of Einstein-Maxwell black holes differs from the lowest order perturbative value D-2, and that the first correction term to g/(D-2) is universal.

Allahverdizadeh, Masoud; Kunz, Jutta; Navarro-Lerida, Francisco [Institut fuer Physik, Universitaet Oldenburg, Postfach 2503 D-26111 Oldenburg (Germany); Departmento de Fisica Atomica, Molecular y Nuclear, Ciencias Fisicas, Universidad Complutense de Madrid, E-28040 Madrid (Spain)

2010-07-15

30

Non-adiabatic description of proton emission from the odd-odd nucleus 130Eu

NASA Astrophysics Data System (ADS)

We discuss the non-adiabatic quasiparticle approach for calculating the rotational spectra and decay width of odd-odd proton emitters. The Coriolis effects are incorporated in both the parent and daughter wave functions. Results for the two probable ground states (1+ and 2+) of the proton emitter 130Eu are discussed. With our calculations, we confirm the proton emitting state to be the I? = 1+ state, irrespective of the strength of the Coriolis interaction. This study provides us with an opportunity to look into the details of wave functions of deformed odd-odd nuclei to which the proton emission halflives are quite sensitive.

Patial, Monika; Arumugam, P.; Jain, A. K.; Maglione, E.; Ferreira, L. S.

2014-03-01

31

First Observation Of Excited States In The T = -1, Odd-Odd Nucleus 48 Mn

Gamma decays depopulating excited states in the odd-odd N=Z - 2 nucleus 48Mn have been observed for the first time. The yrast band has been built up from the 4+ ground state to 13+, just shy of the expected band termination at 15+. When compared with its mirror, 48V, the Coulomb energy differences are unlike any other previously measured which, until now, have been dominated by a sudden rotational alignment. Such an alignment is expected to be blocked in these odd-odd nuclei and calculations not only confirm this, but also infer that any Coulomb difference is mostly due to monopole effects.

Chandler, C.; Bentley, M.A.; Hammond, G. [School of Chemistry and Physics, Keele University, Keele, Staffordshire, ST5 5BG (United Kingdom); Carpenter, M.P.; Davids, C.N.; Janssens, R.V.F.; Seweryniak, D. [Physics Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Du Rietz, R.; Ekman, J. [Department of Physics, Lund University, S-22100 Lund (Sweden); Freeman, S.J. [Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL (United Kingdom); Physics Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Lenzi, S.M. [Dipartimento di Fisica, Padova (Italy); INFN, Padova (Italy)

2005-04-05

32

First Observation Of Excited States In The T = -1, Odd-Odd Nucleus 48 Mn

NASA Astrophysics Data System (ADS)

Gamma decays depopulating excited states in the odd-odd N=Z - 2 nucleus 48Mn have been observed for the first time. The yrast band has been built up from the 4+ ground state to 13+, just shy of the expected band termination at 15+. When compared with its mirror, 48V, the Coulomb energy differences are unlike any other previously measured which, until now, have been dominated by a sudden rotational alignment. Such an alignment is expected to be blocked in these odd-odd nuclei and calculations not only confirm this, but also infer that any Coulomb difference is mostly due to monopole effects.

Chandler, C.; Bentley, M. A.; Carpenter, M. P.; Davids, C. N.; Du Rietz, R.; Ekman, J.; Freeman, S. J.; Hammond, G.; Janssens, R. V. F.; Lenzi, S. M.; Seweryniak, D.

2005-04-01

33

Particle Multiplets and Collective Excitations in the Odd-Odd Nucleus sup 74 Br.

National Technical Information Service (NTIS)

The odd-odd nucleus sup 74 Br was gamma-spectroscopically studied via the reaction sup 58 Ni( exp 19 F,2pn gamma ) sup 74 Br. Single gamma -spectra, gamma -excitation functions, gamma - gamma coincidences, gamma -angular distributions, and mean life-times...

W. Neumann

1983-01-01

34

T-odd correlations in B?K*l+l- decay beyond the standard model

NASA Astrophysics Data System (ADS)

T-odd correlations as physical observables in the B?K*l+l- decay are studied using the most general form of the effective Hamiltonian. It is observed that these quantities are very sensitive to the new physics. We estimate the potential of discovery of these quantities at future hadron colliders.

Aliev, T. M.; Özpineci, A.; Savc?, M.; Yüce, C.

2002-12-01

35

Interior view, anteroom of the postmaster general's reception hall; shown ...

Interior view, anteroom of the postmaster general's reception hall; shown here are two of the six aluminum statues of postal delivery men - New Post Office Building, Twelfth Street and Pennsylvania Avenue, Washington, District of Columbia, DC

36

Detail of southeast corner and pipes, shown along California Avenue; ...

Detail of southeast corner and pipes, shown along California Avenue; camera facing north. - Mare Island Naval Shipyard, Central Power Plant, California Avenue, norhtwest corner of California Avenue & Seventh Street, Vallejo, Solano County, CA

37

27. INTERIOR VIEW, SIMILAR TO ABOVE BUT SHOWN FROM BEHIND ...

27. INTERIOR VIEW, SIMILAR TO ABOVE BUT SHOWN FROM BEHIND THE FEEDER (NOTE THE CATCH BIN OF CUT NAILS ON THE FLOOR BENEATH THE MACHINE) - LaBelle Iron Works, Thirtieth & Wood Streets, Wheeling, Ohio County, WV

38

1. East side of lower dam shown with water level ...

1. East side of lower dam shown with water level dropped. VIEW WEST - Loleta Recreation Area, Lower Dam, 6 miles Southeast of interesection of State Route 24041 & State Route 66, Loleta, Elk County, PA

39

2. East side of lower dam shown with water flowing ...

2. East side of lower dam shown with water flowing over dam. VIEW WEST - Loleta Recreation Area, Lower Dam, 6 miles Southeast of interesection of State Route 24041 & State Route 66, Loleta, Elk County, PA

40

White Matter Development during Adolescence as Shown by Diffusion MRI

ERIC Educational Resources Information Center

Previous volumetric developmental MRI studies of the brain have shown white matter development continuing through adolescence and into adulthood. This review presents current findings regarding white matter development and organization from diffusion MRI studies. The general trend during adolescence (age 12-18 years) is towards increasing…

Schmithorst, Vincent J.; Yuan, Weihong

2010-01-01

41

4. NORTH SIDE, AND ROOF, EASTERNMOST CAMERA STAND SHOWN IN ...

4. NORTH SIDE, AND ROOF, EASTERNMOST CAMERA STAND SHOWN IN RIGHT MIDDLE DISTANCE. Looking west from top of protective berm near Air Supply building. - Edwards Air Force Base, South Base Sled Track, Firing Control Blockhouse, South of Sled Track at east end, Lancaster, Los Angeles County, CA

42

Contextual view of building 271 from across the river shown ...

Contextual view of building 271 from across the river shown at center between coal sheds at left and building 91 at right; camera facing northwest. - Mare Island Naval Shipyard, Mechanics Shop, Waterfront Avenue, west side between A Street & Third Street, Vallejo, Solano County, CA

43

9. Tower building. Hot water tap floor shown. Mixing vat ...

9. Tower building. Hot water tap floor shown. Mixing vat at center level. Juices mix and flow and left lower level. Copper kettles are down below view level. Looking toward front of building. - Tivoli-Union Brewery, 1320-1348 Tenth Street, Denver, Denver County, CO

44

Study of Even-Even/Odd-Even/Odd-Odd Nuclei in Zn-Ga-Ge Region in the Proton-Neutron IBM/IBFM/IBFFM

NASA Astrophysics Data System (ADS)

We study the even-even, odd-even and odd-odd nuclei in the region including Zn-Ga-Ge in the proton-neutron IBM and the models derived from it: IBM2, IBFM2, IBFFM2. We describe 67Ga, 65Zn, and 68Ga by coupling odd particles to a boson core 66Zn. We also calculate the ?+-decay rates among 68Ge, 68Ga and 68Zn.

Yoshida, N.; Brant, S.; Zuffi, L.

2009-08-01

45

Odd Wisconsin at the Wisconsin Historical Society

NSDL National Science Digital Library

The guiding disclaimer that informs this website offered by the Wisconsin Historical Society is that well-known dictum, "Je n'impose rien; je ne propose rien: j'expose," which means: "I do not impose anything; I do not propose anything: I expose." By drawing on its vast holdings of compelling and curious primary documents, the Wisconsin Historical Society offers these small portions of odd and unusual historical items that are quite worth perusing. The project was started in January 2004, and visitors can view the current items, or look through the monthly archives. The selections offered here may also be browsed by categories, such as odd lives, strange deaths, bizarre events, and animals. Some of the rather intriguing events that visitors can read about here include a first-hand account of the deep freeze of 1838 and Wisconsin's first poet, the rather eccentric James Gates Percival. It may truly be said that this site has "something for everyone."

46

First observation of yrast band in odd-odd $^{162}$ Lu

High spin states of the odd-odd $^{162}$Lu nucleus have been studied via $^{147}$Sm($^{19}$ F,4n$\\\\gamma $)$^{162}$Lu reaction at 95MeV beam energy. Level scheme for yrast band based on $\\\\pi $[h$_{11\\/2}$] $\\\\upsilon $[i$_{13\\/2}$] quasiparticle configuration was established up to I$^\\\\pi $=(23$^{-}$) for the first time. This band shows the signature inversion in energy before backbending generally appeared in this mass region. It

Y. H. Zhang; X. H. Zhou; Q. Z. Zhao; X. F. Sun; X. G. Lei; Y. X. Guo; Z. Liu; X. F. Chen; Y. T. Zhu; S. X. Wen; G. J. Yuan; X. A. Liu

1996-01-01

47

Latino High School Graduation. Defying the Odds.

ERIC Educational Resources Information Center

This book describes how "at-risk" Hispanic youth defy the odds and stay in school to earn a high school diploma. Information about success is needed because Hispanic youth drop out at about twice the rate of non-Hispanic Whites. The discussion is based on the results of a 4-year longitudinal study of 100 Hispanic youth labeled at-risk by their…

Romo, Harriett D.; Falbo, Toni

48

Decline in Cardiorespiratory Fitness and Odds of Incident Depression

Background Studies of physical activity and incidence of physician-diagnosed depression have been limited to a single estimate of self-reported physical activity exposure, despite follow-up periods lasting many years. Purpose To examine longitudinal change in cardiorespiratory fitness, an objective marker of habitual physical activity, and incident depression complaints made to a physician. Methods Cardiorespiratory fitness assessed at four clinic visits between 1971 and 2006, each separated by an average of 2–3 years, was used to objectively measure cumulative physical activity exposure in cohorts of 7936 men and 1261 women, aged 20–85 years, from the Aerobics Center Longitudinal Study who did not complain of depression at their first clinic visit in 1971–2003. Data were analyzed in August 2010. Results Across subsequent visits, there were 446 incident cases in men and 153 cases in women. After adjustment for age, time between visits, BMI at each visit, and fitness at Visit 1, each 1-minute decline in treadmill endurance (i.e., a decline in cardiorespiratory fitness of approximately 1 half-MET) between ages 51 and 55 years in men and ages 53 and 56 years in women, increased the odds of incident depression complaints by approximately 2% and 9.5%, respectively. The increased odds remained significant but were attenuated to 1.3% and 5.4% after further adjustment at each visit for smoking, alcohol use, chronic medical conditions, anxiety, and sleep problems. Conclusions Maintenance of cardiorespiratory fitness during late middle-age, when decline in fitness typically accelerates, helps protect against the onset of depression complaints made to a physician.

Dishman, Rodney K.; Sui, Xuemei; Church, Timothy S.; Hand, Gregory A.; Trivedi, Madhukar H.; Blair, Steven N.

2012-01-01

49

Structure of hard-hypersphere fluids in odd dimensions.

The structural properties of single component fluids of hard hyperspheres in odd space dimensionalities d are studied with an analytical approximation method that generalizes the rational function approximation earlier introduced in the study of hard-sphere fluids [S. B. Yuste and A. Santos, Phys. Rev. A 43, 5418 (1991)]. The theory makes use of the exact form of the radial distribution function to first order in density and extends it to finite density by assuming a rational form for a function defined in Laplace space, the coefficients being determined by simple physical requirements. Fourier transform in terms of reverse Bessel polynomials constitute the mathematical framework of this approximation, from which an analytical expression for the static structure factor is obtained. In its most elementary form, the method recovers the solution of the Percus-Yevick closure to the Ornstein-Zernike equation for hyperspheres at odd dimensions. The present formalism allows one to go beyond by yielding solutions with thermodynamic consistency between the virial and compressibility routes to any desired equation of state. Excellent agreement with available computer simulation data at d=5 and d=7 is obtained. PMID:18233644

Rohrmann, René D; Santos, Andrés

2007-11-01

50

Abelian zero modes in odd dimensions

We show that the Loss-Yau zero modes of the 3d-Abelian-Dirac operator may be interpreted in a simple manner in terms of a stereographic projection from a 4d-Dirac operator with a constant field strength of definite helicity. This is an alternative to the conventional viewpoint involving Hopf maps from S{sup 3} to S{sup 2}. Furthermore, our construction generalizes in a straightforward way to any odd dimension. The number of zero modes is related to the Chern-Simons number in a nonlinear manner.

Dunne, Gerald V.; Min, Hyunsoo [Department of Physics, University of Connecticut, Storrs, Connecticut 06269 (United States); Department of Physics, University of Seoul, Seoul 130-743 (Korea, Republic of)

2008-09-15

51

Abelian zero modes in odd dimensions

NASA Astrophysics Data System (ADS)

We show that the Loss-Yau zero modes of the 3d-Abelian-Dirac operator may be interpreted in a simple manner in terms of a stereographic projection from a 4d-Dirac operator with a constant field strength of definite helicity. This is an alternative to the conventional viewpoint involving Hopf maps from S3 to S2. Furthermore, our construction generalizes in a straightforward way to any odd dimension. The number of zero modes is related to the Chern-Simons number in a nonlinear manner.

Dunne, Gerald V.; Min, Hyunsoo

2008-09-01

52

Synchrotron Radiation Studies on Even-Odd and Odd-Even Nylons

NASA Astrophysics Data System (ADS)

Aliphatic polyamides derived from odd diamine or odd dicarboxylic acid units cannot adopt a conventional sheet structure when molecular chains have an all trans conformation. However, typical fiber diffraction patterns of this sheet structure were observed in several polyamides derived from odd units such as nylons 65 and 56. Consequently, a new structure based on the establishment of intermolecular hydrogen bonds along two different directions was postulated. Real-time temperature dependence of X-ray diffraction patterns for nylons 65 and 56 was studied by synchrotron radiation to gain understanding of the Brill transition usually occurring in polyamides. Significant differences were found between the temperature dependence of both nylons, although a transition towards a monoclinic structure characterized by a single equatorial reflection around 0.425-0.420 nm was observed to occur at high temperatures. This transition was reversible for nylon 65 only. In this case, a characteristic hysteresis effect was found.

Ricart, A.; Soto, D.; Franco, L.; Morales, L. T.; Puiggalí, J.

2010-11-01

53

White matter development during adolescence as shown by diffusion MRI.

Previous volumetric developmental MRI studies of the brain have shown white matter development continuing through adolescence and into adulthood. This review presents current findings regarding white matter development and organization from diffusion MRI studies. The general trend during adolescence (age 12-18 years) is towards increasing fractional anisotropy (FA) with age and decreasing mean diffusivity (MD) with age, findings primarily due to decreasing radial diffusivity with age. However, results of studies vary as to the regional specificity of such age-related changes, likely due in part to methodological issues. Another general trend is for FA to positively correlate and MD to negatively correlate with cognitive function. This trend is however region-specific, task-specific, and population-specific; some studies have in fact found negative correlations of FA and positive correlations of MD in specific regions with specific measures of cognitive performance. There are also published reports of sexual dimorphism in white matter development, indicating differing developmental trajectories between males and females as well as differing relationships developmentally between white matter architecture and cognitive function. There is a need for more research to further elucidate the development of white matter and its relation to cognitive function during this critical developmental period. PMID:19628324

Schmithorst, Vincent J; Yuan, Weihong

2010-02-01

54

Gear Durability Shown To Be Improved by Superfinishing

NASA Technical Reports Server (NTRS)

Gears, bearings, and similar mechanical elements transmit loads through contacting surfaces. At the NASA Glenn Research Center at Lewis Field, we postulated that the fatigue lives of gears could be improved by providing smoother tooth surfaces. A superfinishing process was applied to a set of conventionally ground, aerospace-quality gears. This process produced a highly polished, mirrorlike surface as shown in the preceding photograph. The surface fatigue lives of both superfinished and conventionally ground gears were measured by experiments. The superfinished gears survived about four times longer than the conventionally ground gears. These superfinished gears were produced from conventionally ground, aerospace-quality gears whose geometry had been inspected. The gears were superfinished by placing them in a vibrating bath consisting of water, detergent, abrasive powder, and small pieces of zinc. Upon removal from the bath, the surfaces were highly polished, as depicted in the preceding photograph. The gears were again inspected, and dimensional measurements made before and after the superfinishing operation were compared. Superfinishing removed the peaks of the grinding marks and left a much smoother surface. Profile and spacing checks proved that the overall gear tooth shape was not affected in any harmful way. Superfinishing uniformly removed approximately 2.5 microns from each surface.

Krautz, Timothy L.

2000-01-01

55

Mothers' Caries Increases Odds of Children's Caries

There are many determinants of children’s dental caries. We hypothesized that a mother’s untreated caries was associated with increased likelihood of her children’s untreated caries, after controlling for other factors. This population-based study was conducted in a rural, primarily Hispanic, California community. Interview and dental examination data for mother-child (children < 18 yrs old) dyads were analyzed. In a Generalized Estimation Equation (GEE) logit model for mothers (n = 179) and children (n = 387), maternal untreated caries was a statistically significant correlate of child’s untreated caries, odds ratio (OR) = 1.76 (95%CI: 1.10, 2.70), adjusted for demographic factors. This relationship did not change when behavioral and dental utilization factors were added to the model, OR = 1.85 (95% CI: 1.12, 3.07). Maternal untreated caries almost doubled the odds of children’s untreated caries and significantly increased child’s caries severity by about 3 surfaces. Caries prevention and dental utilization programs for mothers and their children should be increased.

Weintraub, J.A.; Prakash, P.; Shain, S.G.; Laccabue, M.; Gansky, S.A.

2010-01-01

56

Background Research has indicated that a number of different factors affect whether an animal receives treatment or not when diseased. The aim of this paper was to evaluate if herd or individual animal characteristics influence whether cattle receives veterinary treatment for disease, and thereby also introduce misclassification in the disease recording system. Methods The data consisted mainly of disease events reported by farmers during 2004. We modelled odds of receiving veterinary treatment when diseased, using two-level logistic regression models for cows and young animals (calves and heifers), respectively. Model parameters were estimated using three procedures, because these procedures have been shown, under some conditions, to produce biased estimates for multi-level models with binary outcomes. Results Cows located in herds mainly consisting of Swedish Holstein cows had higher odds for veterinary treatment than cows in herds mainly consisting of Swedish Red cows. Cows with a disease event early in lactation had higher odds for treatment than when the event occurred later in lactation. There were also higher odds for veterinary treatment of events for cows in January and April than in July and October. The odds for veterinary treatment of events in young animals were higher if the farmer appeared to be good at keeping records. Having a disease event at the same date as another animal increased the odds for veterinary treatment for all events in young animals, and for lameness, metabolic, udder and other disorders, but not for peripartum disorders, in cows. There were also differences in the odds for veterinary treatment between disease complexes, both for cows and young animals. The random effect of herd was significant in both models and accounted for 40–44% of the variation in the cow model and 30–46% in the young animal model. Conclusion We conclude that cow and herd characteristics influence the odds for veterinary treatment and that this might bias the results from studies using data from the cattle disease database based on veterinary practice records.

Mork, Marie Jansson; Emanuelson, Ulf; Lindberg, Ann; Vagsholm, Ivar; Egenvall, Agneta

2009-01-01

57

Investigation of the High Spin Structure of the Odd-Odd Nucleus BROMINE-76

NASA Astrophysics Data System (ADS)

The structure of the odd-odd nucleus _sp{35}{76}Br _{41} at high angular momentum was investigated experimentally. Its high spin states were populated in the fusion-evaporation reaction ^{19}F + ^{63 }Cu at a laboratory bombarding energy of 67 MeV. Its decay was studied via discrete coincident gamma ray spectroscopy. Several new low lying states and gamma ray transitions were observed. In addition, a previously unreported rotational sequence is proposed. The results were compared to calculations using the Cranked Woods-Saxon Bogoljubov formalism and Strutinsky shell correction.

Wehner, Lilian Faro

58

High-spin states in the odd-odd nucleus {sup 146}Tb

The odd-odd {sup 146}Tb nucleus has been investigated using the {sup 115}In({sup 34}S,3n) reaction at 140 MeV incident energy using an array of eight Compton-suppressed Clover detectors. Based on the observed {gamma}-{gamma} coincidences, the level structure of {sup 146}Tb has been extended up to E{sub x}{approx}10 MeV. Linear polarization measurements have been combined with angular correlations of the observed {gamma} rays to assign the electromagnetic nature to the transitions. Probable origin of a cascade of M1 transitions observed around 8 MeV excitation energy has been discussed.

Krishichayan,; Chakraborty, A.; Ghugre, S.S.; Goswami, R.; Mukhopadhyay, S.; Pattabiraman, N.S.; Ray, S.; Sinha, A.K.; Sarkar, S.; Madhusudhana Rao, P.V.; Garg, U.; Basu, S.K.; Yogi, B.K.; Chaturvedi, L.; Dhal, A.; Sinha, R.K.; Sarkar, M. Saha; Saha, S.; Singh, R.; Bhowmik, R.K. [Inter University Consortium For DAE Facilities, Calcutta Center, Sector III, LB-8, Bidhan Nagar, Kolkata 700 098 (India); Department of Physics, University of Burdwan, Burdwan 713 104 (India); Department of Nuclear Physics, Andhra University, Waltair 530 003 (India); Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States); Variable Energy Cyclotron Center, Sector-I/AF, Bidhan Nagar, Kolkata 700 064 (India); Department of Physics, Govt. College, Kota 324 009 (India); Department of Physics, Banaras Hindu University, Varanasi 221 005 (India); Saha Institute of Nuclear Physics, Sector-I/AF, Bidhan Nagar, Kolkata 700 064 (India); Department of Physics and Astrophysics, University of Delhi, New Delhi 110 007 (India); Nuclear Science Center, Aruna Asaf Ali Marg, New Delhi 110 067 (India)] [and others

2004-10-01

59

Wellness Factors Decrease the Odds of Drinking and Driving among College Students

ERIC Educational Resources Information Center

The authors examined holistic wellness factors and drinking and driving behaviors among undergraduate students. Two factors of the Indivisible Self Wellness Model, the Coping Self and the Physical Self, decreased the odds of engaging in drinking and driving behavior. (Contains 2 tables and 1 figure.)

Lewis, Todd F.; Myers, Jane E.

2012-01-01

60

Oscillator with odd- symmetrical characteristics eliminates low-frequency noise sidebands

Low-frequency noise in an oscillator normally produces two LF noise sidebands around the center frequencyf_{0}of the oscillator. It was shown experimentally that these noise sidebands can be eliminated by using an oscillator circuit with an odd-symmetrical characteristic. A simple theory based on the van der Pol approach to oscillators can explain the observed effects.

H. Chen; A. van der Ziel; K. Amberiadis

1984-01-01

61

NASA Astrophysics Data System (ADS)

We point out a simplicity that arises when we use an interaction in which only an energy with odd J is nonzero. The emphasis is on J=Jmax and in particular J=9+ in the g9/2 shell. It is noted that high overlaps can be deceptive. In many cases a single set of unitary 9-j coefficients gives either an exact or a surprisingly good approximation to the wave function of a nondegenerate state. The many degeneracies that occur in these calculations are discussed and explained. As a counterpoint, we compare the results with an interaction in which both the J=0 and J=Jmax two-body matrix elements are equal (and attractive). Comparisons with a more realistic interaction are also made.

Zamick, L.; Escuderos, A.

2013-04-01

62

NSDL National Science Digital Library

Physics is the scientific study of the basic principles of the universe, including matter, energy, motion and force, and their interactions. Major topics include classical mechanics, thermodynamics, light and optics, electromagnetism and relativity.

K-12 Outreach,

63

Magnetic-field-induced odd-frequency superconductivity in s-wave superconductors

NASA Astrophysics Data System (ADS)

The wavefunction of the Cooper pair of the conventional BCS state is characterized by an evenparity (s-wave) spin-singlet state. An external magnetic field is well known to modify the wavefunction of the Cooper pair and to break the conventional BCS superconducting state. We find that the wavefunction of the modified Cooper pair contains a spin-triplet component with s-wave orbital symmetry. While the spin-triplet s-wave Cooper pair is forbidden owing to the fermion property, it is permitted in the generalized theoretical framework containing an odd-frequency dependence of the order parameter. We investigate this point on the basis of the self-consistent calculation in the Eliashberg theory and find that the odd-frequency order parameter coexists with the evenfrequency one. We also report how the physical properties are affected by the induced odd-frequency superconducting order parameter.

Matsumoto, Masashige; Koga, Mikito; Kusunose, Hiroaki

2013-08-01

64

High-Spin Structure in Odd-Odd 160Lu Nucleus

NASA Astrophysics Data System (ADS)

The high-spin states of 160Lu are populated by the fusion-evaporation reaction 144Sm(19F,3n)160Lu at beam energies of 90 and 106 MeV. A new level scheme of 160Lu is established. A possible isomeric state based on the ?h11/2?h9/2 configuration is observed. The new decoupled band with the configuration of ?d3/2[411]1/2+?i13/2[660]1/2+ is established, and the configurations of these similar decoupled bands in the neighboring odd-odd 162-166Lu nuclei are suggested. A positive parity coupled band is assigned as the ?d5/2[402]5/2+?i13/2[660]1/2+ configuration.

Wang, Lie-Lin; Lu, Jing-Bin; Yang, Dong; Ma, Ke-Yan; Zhou, Yin-Hang; Yin, Li-Chang; Wu, Xiao-Guang; Wen, Shu-Xian; Li, Guang-Sheng; Yang, Chun-Xiang

2012-06-01

65

Isospin and deformation studies in the odd-odd N=Z nucleus {sup 54}Co

High-spin states in the odd-odd N=Z nucleus {sup 54}Co have been investigated by the fusion-evaporation reaction {sup 28}Si({sup 32}S,1{alpha}1p1n){sup 54}Co. Gamma-ray information gathered with the Ge detector array Gammasphere was correlated with evaporated particles detected in the charged particle detector system Microball and a 1{pi} neutron detector array. A significantly extended excitation scheme of {sup 54}Co is presented, which includes a candidate for the isospin T=1, 6{sup +} state of the 1f{sub 7/2}{sup -2} multiplet. The results are compared to large-scale shell-model calculations in the fp shell. Effective interactions with and without isospin-breaking terms have been used to probe isospin symmetry and isospin mixing. A quest for deformed high-spin rotational cascades proved negative. This feature is discussed by means of cranking calculations.

Rudolph, D.; Andersson, L.-L.; Ekman, J.; Erten, O.; Fahlander, C.; Johansson, E. K.; Andreoiu, C. [Department of Physics, Lund University, S-22100 Lund (Sweden); Bengtsson, R.; Ragnarsson, I. [Department of Mathematical Physics, LTH, Lund University, S-22100 Lund (Sweden); Bentley, M. A.; Williams, S. J. [School of Chemistry and Physics, Keele University, Keele, Staffordshire, ST5 5BG United Kingdom (United Kingdom); Carpenter, M. P.; Seweryniak, D. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Charity, R. J.; Reviol, W.; Sarantites, D. G. [Chemistry Department, Washington University, St. Louis, Missouri 63130 (United States); Clark, R. M.; Fallon, P.; Macchiavelli, A. O.; Svensson, C. E. [Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

2010-11-15

66

Study of Medium-Mass Odd-Odd Nuclei Close to the N = Z Line

NASA Astrophysics Data System (ADS)

The ?+ decay of the N = Z odd-odd nuclei 62Ga and 70Br has been investigated at the on-line mass separator of GSI Darmstadt. The nuclei were produced by using beams of 36Ar on 28Si and 40Ca targets. In the decay of 62Ga, besides an intense 511 keV annihilation peak, the 954 keV 2+ ? 0+ transition in 62Zn has been observed weakly, whereas many ? transitions with a half-life of 2.2(1) s have been identified in the 70Br ? 70Se decay. Based on the observed population of levels in 70Se, spin and parity of 9+ are assigned to the ?-decaying state in 70Br. The occurrence of such a high-spin state is interpreted as arising from the (?9/2+[404], ?9/2+[404])) intruder configuration at oblate deformation.

Döring, J.; Plettner, C.; Axiotis, M.; Borcea, R.; Eberth, J.; Gadea, A.; Górska, M.; Grawe, H.; Janas, Z.; Kirchner, R.; La Commara, M.; Mazzocchi, C.; Nácher González, E.; P?ochocki, A.; Roeckl, E.; Schmidt, K.; Schwengner, R.; Steinhardt, T.; ?ylicz, J.

2001-11-01

67

Theoretical description of fine structure in the ? decay of heavy odd-odd nuclei

NASA Astrophysics Data System (ADS)

The newly developed multichannel cluster model (MCCM), based on the coupled-channel Schrödinger equation with outgoing wave boundary conditions, is extended to study the ?-decay fine structure in heavy odd-odd nuclei. Calculations are performed for the ? transitions to favored rotational bands where the unpaired nucleons remain unchanged. The simple WKB barrier penetration formula is also used to evaluate the branching ratios for various daughter states. It is found that the WKB formula seems to overestimate the branching ratios for the second and third members of the favored rotational band, while the MCCM gives a precise description of them without any adjustable parameters. Moreover, the experimental total ?-decay half-lives are well reproduced within the MCCM.

Ni, Dongdong; Ren, Zhongzhou

2013-02-01

68

High-Spin States in the Odd-Odd Nucleus 92Nb

NASA Astrophysics Data System (ADS)

High spin states of the odd-odd nucleus 92Nb are investigated using the 82Se (14N, 4n)92Nb reaction at a beam energy of 54 MeV. The level scheme of the 92Nb was extended up to J? =(16+) at about 7.3 MeV and J?=(21?) at about 9.7 MeV. According to systematic analyses and a comparison with the neighboring nucleus, the higher spin states could be interpreted by the multi-particle excitations in the ?(f5/2,p3/2,p1/2,g9/2)?(p1/2,g9/2,d5/2, g7/2) configuration space.

Wu, Yi-Heng; Lu, Jing-Bin; Luo, Peng-Wei; Li, Guang-Sheng; Li, Hong-Wei; Wu, Xiao-Guang; He, Chuang-Ye; Zheng, Yun; Ma, Ke-Yan; Yang, Dong; Li, Cong-Bo; Hu, Shi-Peng; Liu, Jia-Jian; Wang, Jin-Long; Yao, Shun-He; Chen, Qi-Ming; Zhong, Jian

2014-04-01

69

Inferring the depth of the zonal jets on Jupiter and Saturn from odd gravity harmonics

NASA Astrophysics Data System (ADS)