Quantitative analysis of pixel crosstalk in AMOLED displays

The resolution of organic light-emitting diode (OLED) displays is increasing steadily as these displays are adopted for mobile and virtual reality (VR) devices. This leads to a stronger pixel crosstalk effect, where the neighbors of active pixels unintentionally emit light due to a lateral electric current between the pixels. Recently, the crosstalk was quantified by measuring the current flowing through the common hole transport layer between the neighboring pixels and comparing it to the current through the active pixel diode. The measurements showed that the crosstalk is more crucial for low light levels. In such cases, the intended and parasitic currents are similar. The simulations performed in this study validated these measurement results. By simulations, we quantify the crosstalk current through the diode. The luminous intensity can be calculated with the measured current efficiency of the diodes. For low light levels, the unintended luminance can reach up to 40% of the intended luminance. The luminance due to pixel crosstalk is perceivable by humans. This effect should be considered for OLED displays with resolutions higher than 300 PPI

Die Mantuaner Sinfonia: Studien zu den Sinfonien Salamone Rossis, Giovanni Battista Buonamentes und Marco Uccellinis

Abstract zur Dissertation „Die Mantuaner Sinfonia. Studien zu den Sinfonien Salamone Rossis, Giovanni Battista Buonamentes und Marco Uccellinis“ von Matthias Kirsch Die Arbeit untersucht eine Sondertradition kurzer instrumentaler Einleitungssätze des italienischen seicento, die durchweg als gedrucktes Repertoire überliefert sind. Dabei handelt es sich um gut 150 Kompositionen Salamone Rossis, Giovanni Battista Buonamentes und Marco Uccellinis. Die Methode der Studie ist analytisch-strukturell: Zentraler Gegenstand der Untersuchungen sind deshalb die Ausdifferenzierung besonderer Verlaufsarten und deren historische Einordnung vor dem allgemeinen Hintergrund zeitgenössischer Kompositionsweisen. Zugleich werden Gattungsfragen und Konzepte der einschlägigen wissenschaftlichen Literatur (stil moderno, durezze und Instrumentale Monodie) diskutiert. Ebenso wird der Frage nach zeitnahen Rezeptionszeugnissen nachgegangen. Eine Darstellung der jeweiligen Klangtechnik in den drei Teilrepertoires rundet die Untersuchung musiktheoretisch ab

Zwischen Gesangbuch und Oper: Gottorfer Fürstinnen und die Musik

Viele Daten zum höfischen Leben auf Schloss Gottorf um das Jahr 1700 sind noch nicht genau bekannt. Insbesondere die weiblichen Mitglieder der Herrscherfamilie bleiben zu erforschen, auch was ihr kulturelles Interesse und ihr gewisses musikalisches ›Profil‹ betrifft. Diese kurze Skizze nimmt Widmungen von Kantaten, Singbaletten und Opern-Arrangements als Ausgangspunkt für eine kurze Diskussion bestimmter weiblicher Musikinteressen in den fraglichen Jahrzehnten. Die Hauptfiguren sind dabei Marie Elisabeth, Friederike Amalie und Sophie Amalie von Schleswig-Holstein-Gottorf, die drei Generationen der Herrscherfamilie repräsentieren. Als besondere Methode wird hier das Studium von zeitgenössischen Zeitungstexten genutzt, um mehr Einblick in die besondere Situation zu bekommen. Neben typischen Kurzmeldungen mit Bezug zur Hofmusik, kommen auch Bewegungsdaten zur Sprache. Auf diese Weise wird einiges an neuem Wissen generiert und führt zu neuen Fragestellungen.Much data concerning courtly life at Gottorf-Castle around the year 1700 remains unknown. In particular, the cultural interests of female members of the ruling family, along with their musical ›profile‹, warrant further investigation. This brief sketch initiates a discussion by examining dedications of Cantatas, Singballette, and Opera-Arrangements, shedding light on certain female musical interests during this period. Here, the main figures are Marie Elisabeth, Friederike Amalie and Sophie Amalie of Schleswig-Holstein-Gottorf, representing three generations of the ruling family. Employing contemporary newspaper texts as a primary method, this study delves into courtly musical activities, exploring both typical brief announcements related to court music and movement data. Through this approach, new insights emerge, prompting further inquiries into this intriguing aspect of court life

Johann Christian Kittels Choralbuch für Schleswig-Holstein: Einige Bemerkungen zu den Vierstimmigen Chorälen mit Vorspielen von 1803

In den Jahren 1800 und 1801 arbeitete Johann Christian Kittel aus Erfurt während eines Aufenthalts in Altona an einem Choralbuch für Schleswig-Holstein. Die genaueren Umstände der Ausarbeitung und Publikation dieser heute gut bekannten Sammlung von knappen Orgelvorspielen und vierstimmig ausgesetzten Chorälen sind bislang eher spekulativ behandelt worden, obwohl mehrere Bestände im Landesarchiv Schleswig-Holstein recht genau darüber Auskunft geben. Bemerkenswert an der Entstehungsgeschichte von Kittels Choralbuch ist der Umgang mit den zeitüblichen Forderungen für einen anzupassenden Kirchengesang, der in seinen Grundzügen aufklärerischen Zielen entsprechen sollte. Ein wohlmeinendes Gutachten des Kopenhagener Musikgelehrten Peter Grönland offenbart die Verbindungen zu einem Netzwerk von Bach-Kennern zwischen Berlin, Kopenhagen und Hamburg, das auch um 1800 noch vom direkten Kontakt mit CPE Bach geprägt war. Letztlich verfehlte Kittels Choralbuch aber seinen Zweck: Es wurde eingehend kritisiert von dessen Schüler Georg Christian Apel, Organist an der Kieler Nikolaikirche, der – wohl auch durch diese Auseinandersetzung veranlasst – nur wenige Jahre später eigene Melodien- und Choralbüchern für Schleswig-Holstein herausbrachte.In 1800 and 1801 Johann Christian Kittel from Erfurt worked (during a sojourn in Altona) on a Chorale-Book for Schleswig and Holstein. Well-known nowadays as a collection of small preludes and four-part Chorale-settings, the circumstances of the book’s publication were not very clear and more a subject of speculation. However, the regional archives are hosting a considerable amount of documents on Kittel and his project, so it is possible to get more insight in the conditions of Kittels work on this collection, as well as on its publication and distribution. Also remarkable are some hints on conditions of reworking melody and setting in respect of enlightenment-thought about congregational singing and church-melodies in general. A friendly report on some work samples, which Kittel sent to the royal administration, was written by the music scholar Peter Grönland in Copenhagen and reveals the pro-Bach connection or network between Berlin, Hamburg and Northern Europe. However, the reception of Kittels Chorale-book failed the aims of author and administration: Especially the Nikolai-Organist in Kiel, Georg Christian Apel, criticized Kittels book in detail and found reasons to work out an own collection over the following decades

The PAX Toolkit and its Applications at Tevatron and LHC

At the CHEP03 conference we launched the Physics Analysis eXpert (PAX), a C++ toolkit released for the use in advanced high energy physics (HEP) analyses. This toolkit allows to define a level of abstraction beyond detector reconstruction by providing a general, persistent container model for HEP events. Physics objects such as particles, vertices and collisions can easily be stored, accessed and manipulated. Bookkeeping of relations between these objects (like decay trees, vertex and collision separation, etc.) including deep copies is fully provided by the relation management. Event container and associated objects represent a uniform interface for algorithms and facilitate the parallel development and evaluation of different physics interpretations of individual events. So-called analysis factories, which actively identify and distinguish different physics processes and study systematic uncertainties, can easily be realized with the PAX toolkit. PAX is officially released to experiments at Tevatron and LHC. Being explored by a growing user community, it is applied in a number of complex physics analyses, two of which are presented here. We report the successful application in studies of t-tbar production at the Tevatron and Higgs searches in the channel t-tbar-Higgs at the LHC and give a short outlook on further developments

Paraplegia as a symptom of failure after endovascular therapy of type B aortic dissection in Marfan syndrome

This report describes successful treatment of an unusual case of concomitant paraplegia and type 1 endoleak during the early postoperative course of endovascular therapy of type B dissection in a patient with Marfan syndrome

Manufacturing of new roughness standards for the linearity of the vertical axis – Feasibility study and optimization

AbstractIn order to provide an alternative for the vertical axis calibration of stylus instruments which is usually performed based on step height standards, a new measurement standard geometry for the calibration of the linearity and research on its manufacturing is needed. For the manufacturing of these geometric measurement standards there is, according to the type of the measurement standard, a broad range of manufacturing processes that can be applied. New measurement standards for the roughness calibration were developed at the University of Kaiserslautern and an ultra-precision turning process was chosen for its manufacturing. The paper presents a feasibility study of the chosen manufacturing process. The aim of the investigations is to present the development of the standard and the qualification of the ultra-precision turning process for the manufacturing of calibration standards. An examination was performed in order to characterize the influences of different process parameters on the quality of the manufactured roughness standard

Quantification and Classification of Cortical Perfusion during Ischemic Strokes by Intraoperative Thermal Imaging

Thermal imaging is a non-invasive and marker-free approach for intraoperative measurements of small temperature variations. In this work, we demonstrate the abilities of active dynamic thermal imaging for analysis of tissue perfusion state in case of cerebral ischemia. For this purpose, a NaCl irrigation is applied to the exposed cortex during hemicraniectomy. The cortical temperature changes are measured by a thermal imaging system and the thermal signal is recognized by a novel machine learning framework. Subsequent tissue heating is then approximated by a double exponential function to estimate tissue temperature decay constants. These constants allow us to characterize tissue with respect to its dynamic thermal properties. Using a Gaussian mixture model we show the correlation of these estimated parameters with infarct demarcations of post-operative CT. This novel scheme yields a standardized representation of cortical thermodynamic properties and might guide further research regarding specific intraoperative diagnostics