4 research outputs found
MEI Kodierung der frühesten Notation in linienlosen Neumen
Das Optical Neume Recognition Project (ONRP) hat die digitale Kodierung von musikalischen Notationszeichen aus dem Jahr um 1000 zum Ziel – ein ambitioniertes Vorhaben, das die Projektmitglieder veranlasste, verschiedenste methodische Ansätze zu evaluieren. Die Optical Music Recognition-Software soll eine linienlose Notation aus einem der ältesten erhaltenen Quellen mit Notationszeichen, dem Antiphonar Hartker aus der Benediktinerabtei St. Gallen (Schweiz), welches heute in zwei Bänden in der Stiftsbibliothek in St. Gallen aufbewahrt wird, erfassen. Aufgrund der handgeschriebenen, linienlosen Notation stellt dieser Gregorianische Gesang den Forscher vor viele Herausforderungen. Das Werk umfasst über 300 verschiedene Neumenzeichen und ihre Notation, die mit Hilfe der Music Encoding Initiative (MEI) erfasst und beschrieben werden sollen. Der folgende Artikel beschreibt den Prozess der Adaptierung, um die MEI auf die Notation von Neumen ohne Notenlinien anzuwenden. Beschrieben werden Eigenschaften der Neumennotation, um zu verdeutlichen, wo die Herausforderungen dieser Arbeit liegen sowie die Funktionsweise des Classifiers, einer Art digitalen Neumenwörterbuchs
Multifunctional Light Sword Metasurface Lens
The depth of focus of an imaging
system determines the range of
change for both the position of focal plane and image plane. Although
a typical light sword optical element with angular modulation of phase
transmittance can extend its focus of depth due to its angular variation
of the optical power, it lacks rotational symmetry and exhibits a
junction, rendering its fabrication extremely difficult. Optical metasurfaces
provide an unusual approach to develop such a device due to their
unprecedented capability in the manipulation of light propagation
in a desirable manner. We propose and experimentally demonstrate a
light sword metasurface lens with multiple functionalities. The position
of focal segments can be controlled by changing the polarization state
of the incident light. The developed ultrathin, ultraflat device can
facilitate device miniaturization and system integration and may find
applications in various fields such as optical coupling, imaging,
and interconnections
Single-Layer Plasmonic Metasurface Half-Wave Plates with Wavelength-Independent Polarization Conversion Angle
Manipulation of polarization state
is of great fundamental importance and plays a crucial role in modern
photonic applications such as optical communication, imaging, and
sensing. Metamaterials and metasurfaces have attracted increasing
interest in this area because they facilitate designer optical response
through engineering the composite subwavelength structures. Here we
propose a general methods of designing half-wave plate and demonstrate
in the near-infrared wavelength range an optically thin plasmonic
metasurface half-wave plates that rotate the polarization direction
of the linearly polarized incident light with a high degree of linear
polarization. The half-wave plate functionality is realized through
arranging the orientation of the nanoantennas to form an appropriate
spatial distribution profile, which behave exactly as in classical
half-wave plates but over in a wavelength-independent way
Additional file 24: Table S21. of Genomic insights into divergence and dual domestication of cultivated allotetraploid cottons
Primers for SNP accuracy validation. (XLSX 12 kb