Results 61 to 70 of about 1,114,043 (348)

A "Periodic Table" for Supersymmetric M-Theory Compactifications

, 2002
We develop a systematic method for classifying supersymmetric orbifold compactifications of M-theory. By restricting our attention to abelian orbifolds with low order, in the special cases where elements do not include coordinate shifts, we construct a ...
Acharya, Acharya, Acharya, Acharya, Acharya, Acharya, Aldazabal, Aldazabal, Atiyah, Blumenhagen, Blumenhagen, Blumenhagen, Candelas, Charles F. Doran, Cvetic, Cvetic, Cvetic, Dasgupta, Doran, Doran, Faux, Faux, Faux, Friedman, Friedman, Gukov, Hořava, Hořava, Ibanez, Joyce, Joyce, Kaplunovsky, Michael Faux, Witten   +33 more
core   +1 more source

How carbon vacancies can affect the properties of group IV color centers in diamond: A study of thermodynamics and kinetics

, 2020
Recently there has been much interest in using Group IV elements from the Periodic Table to fabricate and study X$V$ color centers in diamond where X = Si, Ge, Sn, or Pb and $V$ is a carbon vacancy.
Defo, Rodrick Kuate, Kaxiras, Efthimios, Richardson, Steven L.   +2 more
core   +1 more source

The Synthesis and Structure of a Scandium Nitrate Hydroxy-Bridged Dimeric Complex Supported by Bipyridyl Ligands

Molecules, 2022
The current discussion on whether scandium, yttrium and lanthanum should represent Group 3 in the Periodic Table or whether lutetium should replace lanthanum in the group has prompted us to further explore the structural chemistry of the Group 3 elements
Simon A. Cotton, Paul R. Raithby, Stephanie Schiffers, Simon J. Teat, John E. Warren   +4 more
doaj   +1 more source

On the Importance of σ–Hole Interactions in Crystal Structures

Crystals, 2021
Elements from groups 14–18 and periods 3–6 commonly behave as Lewis acids, which are involved in directional noncovalent interactions (NCI) with electron-rich species (lone pair donors), π systems (aromatic rings, triple and double bonds) as well as ...
Antonio Frontera, Antonio Bauzá
doaj   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

Population Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Theory and applications of atomic and ionic polarizabilities [PDF]

, 2010
Atomic polarization phenomena impinge upon a number of areas and processes in physics. The dielectric constant and refractive index of any gas are examples of macroscopic properties that are largely determined by the dipole polarizability.
Bardon J, Bethe H A, Biémont E, Bouloufa N, Campbell G K, Chang E S, Charles W Clark, Dalgarno A, Dalgarno A, Delone N B, Domelunksen V, Doolen G D, Dubé P, Dzuba V A, Dzuba V A, Edmonds A R, Eichenseer M, Fellmuth B, Froese Fischer C, Gaiser C, Gallagher T F, Gill P, Gill P, Glass R, Gould H, Guella T P, Gugan D, Hameed S, Hameed S, Hamonou L, Hamonou L, Hannaford P, Hibbert A, Hibbert A, Hibbert A, Hogervorst W, Homer, Iskrenova-Tchoukova E, J Mitroy, Jiang D, Johansson I, Khvostenko G, Kimble H J, Komara R A, Lea S N Webster S A Barwood G P, Li J, Lide D R, Lundeen S R, Lupinetti C Thakkar A J, M S Safronova, Magnusson C E, Margolis H S, Migdalek J, Miller T M, Moore C E, Nakajima T, Nikolić D, Norcross D W, Petersen F R, Ralchenko Y Kramida A Reader J NIST ASD Team, Reshetnikov N, Rieger V, Rosenband T Itano W M Schmidt P O Hume D B Koelemeij J C J Bergquist J C Wineland D J, Sandle W J, Sansonetti J, Schwerdtfeger P, Sobelmann I I, Soldán P, Stark J, Stone J A, Suzuki Y, Svanberg S, Swainson R A, Szmytkowski R, Sánchez R, Taylor B N, van Wijngaarden W A, Volz U, Wallard A, Wang Z-W, Wilpers G, Öpik U   +81 more
core   +3 more sources

Between Droughts and Floods: The Seasonal Response of Freshwater Snails in Artificial Reservoirs in the Brazilian Semiarid Region

Population Ecology, EarlyView.
We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva, João Hemerson de Sousa, Adriana Josefa da Rocha, Manuella Feitosa Leal, Lucas Ariel de Sousa Aguiar, Tamaris Gimenez Pinheiro, Edson Lourenço da Silva   +6 more
wiley   +1 more source

A UNIFIED FORMULA FOR HYDROCARBONS WITH APPLICATIONS TO FUNCTIONAL GROUPS [PDF]

Química Nova, 2020
Was supposed a numerical relationship between atoms of Hydrogen and Carbon in a hydrocarbon, assumption valid for all types of chains. In the proposed equation, variables such as number and types of carbon bonds are present, as well as the possible ...
Higo B. Nogueira, Norberto de Kássio V. Monteiro, Pedro de Lima-Neto   +2 more
doaj   +1 more source

Excited states in the twisted XXZ spin chain

, 1999
We compute the finite size spectrum for the spin 1/2 XXZ chain with twisted boundary conditions, for anisotropy in the regime $0< \gamma
Alcaraz F C, Alcaraz F C, Bogoliubov N M, Eckle H-P, Grosse H, Hamer C J, Izergin A G, Klümper A, Korepin V E, O Tirkkonen, Pallua S, T Nassar, Takahashi M, Woynarovich F, Woynarowich F   +14 more
core   +1 more source

Non periodic Ishibashi states: the su(2) and su(3) affine theories [PDF]

, 2002
We consider the su(2) and su(3) affine theories on a cylinder, from the point of view of their discrete internal symmetries. To this end, we adapt the usual treatment of boundary conditions leading to the Cardy equation to take the symmetry group into ...
Behrend, Behrend, Cardy, Cardy, Cardy, Cardy, di Francesco, Gannon, Lewellen, Liénart, Olivier Verhoeven, Petkova, Petkova, Philippe Ruelle, Pradisi, Ruelle, Zuber   +16 more
core   +3 more sources