Results 81 to 90 of about 201,576 (288)

A Comparative Analysis of Space Vector Modulation-Based Common Mode Voltage Reduction Strategies in a Modular Multilevel Converter

IEEE Access
In various variable speed applications with power converters, failures in the bearings caused by common mode voltage (CMV) have been frequently reported. This study investigates space vector modulation (SVM)-based strategies for reducing CMV in a modular
Chengjun Tang, Jian Zhao, Torbjorn Thiringer   +2 more
doaj   +1 more source

Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis

Advanced Functional Materials, EarlyView.
An all‐optical method is presented for quantifying the density of boron vacancy spin defects in hexagonal boron nitride (hBN). By correlating Raman and photoluminescence signals with irradiation fluence, defect‐induced Raman modes are identified and established an relationship linking optical signatures to absolute defect densities. This enables direct
Atanu Patra, Paul Konrad, Andreas Sperlich, Timur Biktagirov, Wolf Gero Schmidt, Lesley Spencer, Igor Aharonovich, Sven Höfling, Vladimir Dyakonov   +8 more
wiley   +1 more source

Modular Structure and Duality in Conformal Quantum Field Theory

, 1993
Making use of a recent result of Borchers, an algebraic version of the Bisognano-Wichmann theorem is given for conformal quantum field theories, i.e.
B. Schroer, B. Schroer, D. Buchholz, D. Buchholz, D. Guido, D. Guido, G. Mack, H. Araki, H.J. Borchers, I.E. Segal, I.T. Todorov, J. Bisognano, K. Fredenhagen, L. Gilman, M. Postnikov, P. Hislop, P.A.M. Dirac, R. Brunetti, R. Haag, R. Longo, R. Longo, R.F. Streater, S. Doplicher, S. Strâtilâ   +23 more
core   +2 more sources

Molecular Cross‐Linking of MXenes: Tunable Interfaces and Chemiresistive Sensing

Advanced Functional Materials, EarlyView.
In this study, Ti3C2Tx MXenes are initially functionalized using oleylamine ligands to form stable dispersions in an organic solvent. Subsequently ligand exchange with α,ω‐diaminoalkanes enables cross‐linking, along with precise tuning of interfaces. This structural control translates into tunable charge transport and responsive VOC sensing, showing ...
Yudhajit Bhattacharjee, Lukas Mielke, Mahmoud Al‐Hussein, Shivam Singh, Karen Schaefer, Borja Rodriguez‐Barea, Qiong Li, Anik Kumar Ghosh, Artur Erbe, Carmen Herrmann, Yana Vaynzof, Andreas Fery, Hendrik Schlicke   +12 more
wiley   +1 more source

Irreducible vector-valued modular forms of dimension less than six

, 2011
An algebraic classification is given for spaces of holomorphic vector-valued modular forms of arbitrary real weight and multiplier system, associated to irreducible, T-unitarizable representations of the full modular group, of dimension less than six ...
Marks, Christopher
core  

Representations of SL_2(R) and nearly holomorphic modular forms [PDF]

, 2015
In this semi-expository note, we give a new proof of a structure theorem due to Shimura for nearly holomorphic modular forms on the complex upper half plane. Roughly speaking, the theorem says that the space of all nearly holomorphic modular forms is the
Pitale, Ameya, Saha, Abhishek, Schmidt, Ralf   +2 more
core   +2 more sources

Geometric modular action and spontaneous symmetry breaking

, 2004
We study spontaneous symmetry breaking for field algebras on Minkowski space in the presence of a condition of geometric modular action (CGMA) proposed earlier as a selection criterion for vacuum states on general space-times.
Buchholz, Detlev, Summers, Stephen J.
core   +3 more sources

Fixed Point of α-Modular Nonexpanive Mappings in Modular Vector Spaces 𝓁p(·)

Symmetry
Let C denote a convex subset within the vector space 𝓁p(·), and let T represent a mapping from C onto itself. Assume α=(α1,⋯,αn) is a multi-index in [0,1]n such that ∑i=1nαi=1, where α1>0 and αn>0. We define Tα:C→C as Tα=∑i=1nαiTi, known as the mean average of the mapping T.
Buthinah A. Bin Dehaish, Mohamed A. Khamsi   +1 more
openaire   +1 more source

Roll‐to‐Roll Mechanical Exfoliation for Large‐Area van der Waals Films with Preserved Crystallographic Alignment

Advanced Functional Materials, EarlyView.
A roll‐to‐roll exfoliation method is demonstrated that preserves the crystallographic alignment of anisotropic 2D materials over large areas, enabling scalable fabrication of directional electronic and optoelectronic devices. Abstract Anisotropic 2D materials such as black phosphorus (BP), GeS or CrSBr, exhibit direction‐dependent optical and ...
Esteban Zamora‐Amo, Francisco Fernandez‐Canizares, Yigit Sozen, Thomas Pucher, Pedro L Alcázar Ruano, Carmen Munuera, Ryo Ishikawa, Naoya Shibata, María Varela, Der‐Yuh Lin, Bing Wu, Jorge Quereda, Zdenek Sofer, Gabriel Sánchez‐Santolino, Andres Castellanos‐Gomez   +14 more
wiley   +1 more source

Computations of vector-valued Siegel modular forms

, 2012
We carry out some computations of vector valued Siegel modular forms of degree two, weight (k,2) and level one. Our approach is based on Satoh's description of the module of vector-valued Siegel modular forms of weight (k, 2) and an explicit description ...
Ghitza, Alexandru, Ryan, Nathan C., Sulon, David   +2 more
core