Filters








1,185 Hits in 5.0 sec

Designing Flat Band by Strain [article]

Zhen Bi, Noah F. Q. Yuan, Liang Fu
2019 arXiv   pre-print
For bilayer TMD, we show that applying small heterostrain generally leads to flat moiré bands that are highly tunable.  ...  For bilayer graphene with twist angle near 1^∘, we show that heterostrain significantly increases the energy separation between conduction and valence bands as well as the Dirac velocity at charge neutrality  ...  LF is partly supported by the David and Lucile Packard Foundation.  ... 
arXiv:1902.10146v1 fatcat:5dn64g3cp5dtpcf2kodpo4ws2y

BIORTHOGONAL WAVELETS WITH SIX-FOLD AXIAL SYMMETRY FOR HEXAGONAL DATA AND TRIANGLE SURFACE MULTIRESOLUTION PROCESSING

QINGTANG JIANG
2011 International Journal of Wavelets, Multiresolution and Information Processing  
It is desirable that the filter banks for hexagonal data also have high symmetry which is perti- nent to the symmetric structure of the hexagonal lattice.  ...  From (3) and (4), we know when the indices of hexagonally sampled data are labelled by (k1 , k2 ) ∈ Z2 as in Fig. 3, the decomposition and reconstruction algorithms for hexagonal data with hexagonal filter  ... 
doi:10.1142/s0219691311004316 fatcat:izjjg7cisnf3tkpd3tih5gfitu

Page 1538 of Mathematical Reviews Vol. , Issue 91C [page]

1991 Mathematical Reviews  
The buildings of G2(p”) and *D4(p") give generalized hexagons denoted by %(p"), 4%4(p”) (with duals %(p")°).  ...  In this paper the author deals with extended generalized hexagons admitting flag transitive automorphism groups.  ... 

Contact gating at GHz frequency in graphene [article]

Q. Wilmart, A. Inhofer, M. Boukhicha, W. Yang, M. Rosticher, P. Morfin, N. Garroum, G. Fève, J.-M. Berroir, B. Plaçais
2018 arXiv   pre-print
We propose a novel design, overcoming these issues by implementing additional local gates underneath the contact region which allow a full control of the Klein barrier taking place at the contact edge.  ...  We benchmark the standard channel and novel contact gating and report for the later dynamical transconductance levels at the state of the art.  ...  Acknowledgments The research leading to these results have received partial funding from the European union Seventh Framework programme under grant N:604391 Graphene Flagship, and from the ANR-14-CE08-  ... 
arXiv:1804.10883v1 fatcat:z3lyarl7mfculfcde6j4ws25im

A two-phase algorithm for frequency assignment in cellular mobile systems

Sehun Kim, Seong-Lyun Kim
1994 IEEE Transactions on Vehicular Technology  
To handle the considered FAP, we use the pattern approach which fits naturally to the problem.  ...  Based on this approach, we are able to formulate the considered FAP into a manageable optimization problem and propose a two-phase heuristic algorithm for the problem.  ...  Test problems are from the regular hexagonal cellular system of Example 1 in Section 111.  ... 
doi:10.1109/25.312792 fatcat:up6tvwsltjeprhsnbkfj5fvqvu

t-Designs with general angle set

S.G. Hoggar
1992 European journal of combinatorics (Print)  
We derive, in a unified manner, intersection numbers and other parameters for general t-designs in these spaces.  ...  The known infinite Delsarte spaces are d-spheres, and projective spaces over the reals, complex numbers, quaternions and octonions.  ...  g2, P (Dr = ~, C, H, 0) are precisely the symmetric spaces of rank 1 which are compact and connected.  ... 
doi:10.1016/s0195-6698(05)80032-0 fatcat:j6w5mi5oirduvc2mj35ioxfahy

Page 1899 of Mathematical Reviews Vol. , Issue 2003C [page]

2003 Mathematical Reviews  
M. (1-OR; Eugene, OR) Symmetric designs from the G(q) generalized hexagons. (English summary) J. Combin. Theory Ser. A 98 (2002), no. 2, 410-415.  ...  Summary: “We describe symmetric designs D with classical pa- 51 GEOMETRY 2003¢:5 1008 rameters v=(q°—1)/(q-1), k=(g?  ... 

Contact gating at GHz frequency in graphene

Q. Wilmart, A. Inhofer, M. Boukhicha, W. Yang, M. Rosticher, P. Morfin, N. Garroum, G. Fève, J.-M. Berroir, B. Plaçais
2016 Scientific Reports  
We propose a novel design, overcoming these issues by implementing additional local gates underneath the contact region which allow a full control of the Klein barrier taking place at the contact edge.  ...  We benchmark the standard channel and novel contact gating and report for the later dynamical transconductance levels at the state of the art.  ...  Acknowledgements The research leading to these results have received partial funding from the European union Seventh Framework programme under grant N:604391 Graphene Flagship, and from the ANR-14-CE08  ... 
doi:10.1038/srep21085 pmid:26879709 pmcid:PMC4754686 fatcat:syrox2crofeazgdpfroacrozu4

Adsorption of Phosgene Gas on Pristine and Copper-Decorated B12N12 Nanocages: A Comparative DFT Study

Shahid Hussain, Riaz Hussain, Muhammad Yasir Mehboob, Shahzad Ali Shahid Chatha, Abdullah Ijaz Hussain, Ali Umar, Muhammad Usman Khan, Mahmood Ahmed, Muhammad Adnan, Khurshid Ayub
2020 ACS Omega  
The adsorption/interaction energies of COCl2 on pure BN nanocages are -9.30, -6.90, and -3.70 kJ/mol in G1, G2, and G3 geometries, respectively, whereas the interaction energies of COCl2 on copper-decorated  ...  To examine the changes in the properties of pure and Cu-BN nanocages, geometric parameters, dipole moment, Q NBO, frontier molecular orbitals, and partial density of states (PDOS) are analyzed to comprehensively  ...  The pure BN cage, being symmetrical, shows both the charges to an equal extent, which vary slightly after the adsorption of COCl 2 on the pure BN cage (G1, G2, and G3).  ... 
doi:10.1021/acsomega.0c00507 pmid:32280908 pmcid:PMC7144133 fatcat:wen23s3h5rgt7oze7zqyroitra

FinInG: a package for Finite Incidence Geometry [article]

John Bamberg, Anton Betten, Philippe Cara, Jan De Beule, Max Neunhöffer, Michel Lavrauw
2016 arXiv   pre-print
It provides users with the basic tools to work in various areas of finite geometry from the realms of projective spaces to the flat lands of generalised polygons.  ...  The algebraic power of GAP is exploited, particularly in its facility with matrix and permutation groups.  ...  from forms.  ... 
arXiv:1606.05530v1 fatcat:ksc6tt74tnfutn6vdkxyimmi7i

An efficient end to end key establishment protocol for wireless sensor networks

Ali Fanian, Mehdi Berenjkoub
2012 2012 9th International ISC Conference on Information Security and Cryptology  
Since a limited number of shares are generated from a symmetric polynomial, the polynomial degree is very low.  ...  combinatorial design.  ...  Note that the symmetric design conditions are satisfied by these blocks, and it has parameters (q 2 + q + 1, q + 1, 1).  ... 
doi:10.1109/iscisc.2012.6408194 fatcat:47slalqydrcyjhcpxs3u2ftoge

The elastic behaviour of ferroelastic Sb5O7I polytype 2MC studied by ultrasonic experiments and Brillouin scattering

W. Rehwald, A. Vonlanthen, E. Rehaber, W. Prettl
1980 Zeitschrift für Physik B Condensed Matter and Quanta  
The temperature dependence of the elastic functions of the improper ferroelastic polytype 2 MC-SbsOTI has been investigated in the temperature range from room temperature to well above the structural phase  ...  The experimental results are discussed considering cubic and quartic anharmonic coupling between two components of the zone boundary order parameter and elastic waves. * The basis vectors of the reciprocal  ...  Schuhmacher for providing the samples and many interesting communications on the structural properties of the crystals.  ... 
doi:10.1007/bf01305828 fatcat:inefavk2e5bztkxuj7a5ldtk5a

On a Hexagonic Structure. I

G.J. Schellekens
1962 Indagationes Mathematicae (Proceedings)  
To this end one may use some peculiarities of its group, which is an extension of the exceptional group G2The available tools do not suffice to treat the case of a field of characteristic 2.  ...  However, there are more trialities, the geometrically most interesting of them being related with a semi-linear automorphism of the octave algebra. To these also belong hexagonic structures.  ...  In the general case, however, we have the following theorem: (9.1) Suppose HT contains a hexagon.  ... 
doi:10.1016/s1385-7258(62)50019-x fatcat:4we4wsuakndn5oywuoplu5v2se

Generalized pyramidal fracture and yield criteria

B. Paul
1968 International Journal of Solids and Structures  
For example, it is shown that the hexagonal pyramid criterion, a special case of the more general pyramidal criterion, is capable of describing a very broad range of material behavior through the use of  ...  The generality of the criterion is useful for very complex materials, but it is believed that most materials can be adequately described by simple variants of the general criterion.  ...  It is apparent from equations (3.2) that each of the six planes passing through "hexagon number one" intersect at a common point where 0 r = g2 = o3 = l/(A' +B' + C').  ... 
doi:10.1016/0020-7683(68)90010-3 fatcat:sy3btthwbzazlb67tnfbukubym

On automorphism groups of block designs

Richard E. Block
1968 Journal of Combinatorial Theory  
Applications are given to permutation groups on a finite set t2 (about the orbits of k-element subsets of sg) and to designs of configurations in other designs (e.g., about the flag orbits in a finite  ...  This paper studies the relationship between the point orbits and block orbits for groups of automorphisms of balanced incomplete block designs.  ...  For projective planes one can similarly obtain the designs of all pentagons and of all hexagons.  ... 
doi:10.1016/s0021-9800(68)80075-4 fatcat:qydc4aimhvdulglgg7i3z3xedi
« Previous Showing results 1 — 15 out of 1,185 results