Egami, Yasuhiro, Klein, Christian, Henne, Ulrich, Bruse, Martin, Ondrus, Valdimir, Beifuss, Uwe
A Temperature-Sensitive Paint (TSP) with higher temperature sensitivity for the capturing of better quality of images and increased luminescent intensity for shorter measurement times was newly...
Schrödl, Nicolas, Klein, Christian
Regulators expectations to the IFRS introduction are high. In our analyses we measure by different variables for market liquidity how inter alia reporting quality and investors preference...
F.2 [Theory of Computation]: Analysis of Algorithms and Problem Complexity (2008)
Dimo Brockhoff, Christian Klein, Tobias Friedrich, Frank Neumann, Nils Hebbinghaus, Eckart Zitzler
In this paper, we examine how adding objectives to a given optimization problem affects the computation effort required to generate the set of Pareto-optimal solutions. Experimental studies show that...
Silikon-Öl verrät den Luftstrom (2008)
Wucherpfennig, Jens, Klein, Christian
Forscher des Zentralen Aero-Hydrodynamischen Instituts (TsAGI) aus Russland testen zurzeit beim Deutschen Zentrum für Luft- und Raumfahrt (DLR) in Göttingen ein neues Verfahren zur Messung von...
Stefan Funke, Christian Klein, Kurt Mehlhorn, Susanne Schmitt
Project co-funded by the European Commission within FP6 (2002–2006) under contract nr. IST-006413 Most geometric algorithms are idealistic in the sense that they are designed for the Real-RAM model...
F.2 [Theory of Computation]: Analysis of Algorithms and Problem Complexity (2008)
Dimo Brockhoff, Christian Klein, Tobias Friedrich, Frank Neumann, Nils Hebbinghaus, Eckart Zitzler
In this paper, we examine how adding objectives to a given optimization problem affects the computation effort required to generate the set of Pareto-optimal solutions. Experimental studies show that...
Korteweg-de Vries, Nonlinear Schrödinger, Christian Klein, C. Klein
Fourth order time-stepping for low dispersion
Abstract Unbiased Matrix Rounding (2008)
Tobias Friedrich, Benjamin Doerr, Christian Klein, Ralf Osbild
We show several ways to round a real matrix to an integer one such that the rounding errors in all rows and columns as well as the whole matrix are less than one. This is a classical problem with...
ABSTRACT Hole Detection or: “How Much Geometry Hides in Connectivity?” (2008)
Wireless sensor networks typically consist of small, very simple network nodes without any positioning device like GPS. After an initialization phase, the nodes know with whom they can talk directly,...
Grava, Tamara, Klein, Christian
The Cauchy problem for the Korteweg de Vries (KdV) equation with small dispersion of order $\e^2$, $\e\ll 1$, is characterized by the appearance of a zone of rapid modulated oscillations. These...
Benefits of Animated Scrolling (2008)
Christian Klein, Benjamin B. Bederson
We examined the benefits of animated scrolling using four speeds and three different document types in terms of task speed, accuracy and user preference. We considered reading tasks involving...
Klein, Christian, Henne, Ulrich, Sachs, Werner, Engler, Rolf, Egami, Yasuhiro, Ondrus, Vladimir, ...
Visualization and measurements of aerodynamic effects on an 2D-wing-profile model were conducted using an optical pressure measurement system, based on the pressure-sensitive paint (PSP) technique....
Konrath, Robert, Klein, Christian, Schröder, Andreas, Kompenhans, Jürgen
The pressure sensitive paint (PSP) and particle image velocimetry (PIV) techniques are applied to the flow around a delta wing. These investigations are a contribution to the International Vortex...
Fey, Uwe, Egami, Yasuhiro, Klein, Christian
Transition detection in ‘warm’ wind tunnels can be realized using commercially available IR cameras. In cryogenic testing, IR imaging becomes more difficult because of the reduction in radiated...
Unsteady Wing-Pylon-Nacelle Interference in Transonic Flow (2008)
Dietz, Guido, Mai, Holger, Schröder, Andreas, Klein, Christian, Moreaux, N., Leconte, P.
The interference effects between an unswept supercritical airfoil model and an annular wing representing an engine nacelle were investigated. The investigation aims to better understand and predict...
The pressure sensitive paint (PSP system is an optical measurement technique to investigate absolute pressure fields on model surfaces for basic research in laboratories, industrial wind tunnels or...
Visualization and quantitave measurement of aerodynamic effects on several aircraft models have been conducted using an optical pressure measurement system, based on the pressure-sensitive paint...
PSP and PIV Investigations on the VFE-2 Configuration in Sub- and Transonic Flow (2008)
Konrath, Robert, Klein, Christian, Schröder, Andreas
An overview is given about investigations on a 65° delta wing using the Pressure Sensitive Paint (PSP) and Particle Image Velocimetry (PIV) techniques in the framework of the International Vortex...
Klein, Christian, Henne, Ulrich, Sachs, Werner, Egami, Yasuhiro, Ondrus, Vladimir, Beifuss, Uwe
Visualization and measurements of aerodynamic effects on a 2D-wing-profile model were conducted using an optical pressure measurement system, based on the pressure-sensitive paint (PSP) technique....
Advanced Measurement Techniques for Cryogenic Testing (2008)
Fey, Uwe, Egami, Yasuhiro, Konrath, Robert, Koop, Lars, Klein, Christian, Kompenhans, Jürgen
Future generations of aircraft will be developed applying “High Reynolds Number Design”, using advanced computational aerodynamics and industry-scale cryogenic wind tunnels which enable...
Application of Pressure Sensitive Paint -Theory and Pratice- (2008)
Beck, Walter, Davies, Alan, Egami, Yasuhiro, Engler, Rolf, Fey, Uwe, Henne, Ulrich, ...
For investigations of pressure distributions on wind tunnel model surfaces with high spatial resolution new experimental techniques, such as Pressure Sensitive Paint (PSP) are required which allow to...
PSP / TSP Activities at the DLR-Göttingen (2008)
Beck, Walter, Egami, Yasuhiro, Fey, Uwe, Henne, Ulrich, Klein, Christian, Sachs, Werner
Klein, Christian, Henne, Ulrich, Sachs, Werner, Egami, Yasuhiro, Beifuss, Uwe, Ondrus, Vladimir, ...
Der bisherige Einsatz von drucksensitiven Farben PSP (=Pressure Sensitive Paint) hat gezeigt, dass die flächenhafte, quantitative Druckinformation zum Verständnis aerodynamischer Prozesse von...
Advanced Measurement Techniques for Cryogenic Testing (2008)
Fey, Uwe, Egami, Yasuhiro, Konrath, Robert, Koop, Lars, Klein, Christian, Kompenhans, Jürgen
Future generations of aircraft will be developed applying “High Reynolds Number Design”, using advanced computational aerodynamics and industry-scale cryogenic wind tunnels which enable...
Russische Luftfahrt-Forscher experimentierten in Göttingen (2008)
Wucherpfennig, Jens, Klein, Christian
Um bei den Windkanalmessungen die Luftströmung sichtbar zu machen, wurde bislang entweder ein Ölanstrich auf dem Modell aufgetragen oder mühselig viele Fäden befestigt. Der Nachteil: Für jeden...
Russische Luftfahrt-Forscher experimentieren beim DLR in Göttingen (2008)
Wucherpfennig, Jens, Klein, Christian
Forscher des Zentralen Aero-Hydrodynamischen Instituts (TsAGI), Russland sind zurzeit in Göttingen, um beim Deutschen Zentrum für Luft- und Raumfahrt (DLR) ein neues Verfahren zur Messung von...
Temperaturempfindliche Farbe für einen erweiterten Temperaturbereich (2008)
Egami, Yasuhiro, Fey, Uwe, Klein, Christian, Beifuss, Uwe, Quest, Jürgen, Ondrus, Vladimir
Rigorous Analyses of Fitness-Proportional Selection for Optimizing Linear Functions (2008)
Happ, Edda, Johannsen, Daniel, Klein, Christian, Neumann, Frank
Rigorous runtime analyses of evolutionary algorithms (EAs) mainly investigate algorithms that use elitist selection methods. Two algorithms commonly studied are Randomized Local Search (RLS) and the...
Neural guidance molecules, tip cells, and mechanical factors in vascular development (2008)
Le Noble, Ferdinand, Klein, Christian, Tintu, Andrei, Pries, Axel, Buschmann, Ivo
The vascular system is generated and maintained by reactions of blood vessels to stimuli of several types. The basic outline of the vascular system is determined during development by genetic...
Numerical study of a multiscale expansion of KdV and Camassa-Holm equation (2007)
Grava, Tamara, Klein, Christian
We study numerically solutions to the Korteweg-de Vries and Camassa-Holm equation close to the breakup of the corresponding solution to the dispersionless equation. The solutions are compared with...
Dubrovin, Boris, Grava, Tamara, Klein, Christian
We argue that the critical behaviour near the point of ``gradient catastrophe" of the solution to the Cauchy problem for the focusing nonlinear Schr\"odinger equation $ i\epsilon \psi_t...
Biochemische und strukturelle Untersuchungen an Proteinen des p53 Tumorsuppressor-Netzwerks (2007)
Das p53 Protein ist ein Transkriptionsfaktor, der als der wichtigste Tumorsuppressor in Säugern fungiert und in mehr als 50% aller humanen Tumoren mutiert ist. p53 reguliert die Expression einer...
Ce travail présente une discussion d'aspects mathématiques et physiques des solutions des équations d'Einstein et d'Einstein-Maxwell dans le cas stationnaire avec symétrie axiale, obtenues par...
Unsteady Pressure Sensitive Paint measurements on a rotating 65° delta wing (2007)
Klein, Christian, Sachs, Werner, Henne, Ulrich, Egami, Yasuhiro, Ondrus, V., Beifuss, U.
Visualization and measurements of aerodynamic effects on a delta-wing model were conducted using an optical pressure measurement system, based on the pressure-sensitive paint (PSP) technique. The PSP...
Unsteady Wing- Pylon- Nacelle Interference in Transonic Flow (2007)
Dietz, Guido, Mai, Holger, Schröder, Andreas, Klein, Christian, Moreaux, N., Leconte, P.
The interference effects between an unswept supercritical airfoil model and an annular wing representing an engine nacelle were investigated. The investigation aims to better understand and predict...
Klein, Christian, Henne, Ulrich, Sachs, Werner, Egami, Yasuhiro, Ondrus, Vladimir, Beifuss, Uwe
Visualization and measurements of aerodynamic effects on a delta-wing model and a 2D wing profile were conducted using an optical pressure measurement system, based on the Pressure Sensitive Paint...
Unsteady Wing-Pylon-Nacelle Interference in Transonic Flow (2007)
Dietz, Guido, Mai, Holger, Schröder, Andreas, Klein, Christian, Moreaux, N., Leconte, P.
The interference effects between an unswept supercritical airfoil model and an annular wing representing an engine nacelle were investigated. The investigation aims to better understand and predict...
Fey, Uwe, Egami, Yasuhiro, Klein, Christian
The method of temperature-sensitive paint (TSP) adapted to industry-scale, cryogenic wind tunnels (i.e. cryoTSP) is used to detect the natural, laminar-to-turbulent transition of a model’s boundary...
Application of Pressure-Sensitive Paint on an Oscillating 2D profile in Transonic Flow (2007)
Klein, Christian, Henne, Ulrich, Sachs, Werner, Engler, Rolf, Egami, Yasuhiro, Mai, Holger, ...
Measurements of aerodynamic effects on a 2D-wing-profile model were conducted using an optical pressure measurement system, based on the pressure-sensitive paint (PSP) technique. The PSP technique...
LexLearn – Emergenz eines gemeinsam genutzten Lexikons (2007)
Klein, Christian, Fuchs, Dennis
Die vorliegende Diplomarbeit untersucht die Emergenz eines gemeinsam genutzten Lexikons anhand einer Implementierung des Modells von Edwin Hutchins und Brian Hazlehurst. Zunächst erläutert diese...
Egami, Yasuhiro, Klein, Christian, Henne, Ulrich, Fey, Uwe, Bruse, Martin, Ondrus, Valdimir, ...
this entry is intentionally left empty
Unsteady Wing- Pylon- Nacelle Interference in Transonic Flow (2007)
Dietz, Guido, Mai, Holger, Schröder, Andreas, Klein, Christian, Moreaux, N., Leconte, P.
Temperature Sensitive Paint for an Extended Temperature Range (2007)
Egami, Yasuhiro, Fey, Uwe, Klein, Christian, Beifuss, Uwe, Quest, Jürgen, Ondrus, Vladimir
Do Additional Objectives Make a Problem Harder? (2007)
Brockhoff, Dimo, Friedrich, Tobias, Hebbinghaus, Nils, Klein, Christian, Neumann, Frank, Zitzler, Eckart
Faster Evolutionary Algorithms by Superior Graph Representation (2007)
Doerr, Benjamin, Klein, Christian, Storch, Tobias
We present a new representation for individuals in problems that have cyclic permutations as solutions. To demonstrate its usefulness, we analyze a simple randomized local search and a (1+1)...
Aerodynamic measurement technology (2006)
Klein, Christian, Konrath, Robert, Beck, Walter
For the International Vortex Flow Experiment 2 (VFE-2) wind tunnel tests were carried out from the German Aerospace Center (DLR) on a 65° delta wing at sub- and transonic speeds for which the model...
Modern optical methods for the investigation of flows in aerodynamics (2006)
Kompenhans, Jürgen, Schröder, Andreas, Klein, Christian, Engler, Rolf, Fey, Uwe, Konrath, Robert, ...
Unbiased Matrix Rounding (2006)
Doerr, Benjamin, Friedrich, Tobias, Klein, Christian, Osbild, Ralf
We show several ways to round a real matrix to an integer one such that the rounding errors in all rows and columns as well as the whole matrix are less than one. This is a classical problem with...
Numerical solution of the small dispersion limit of Korteweg de Vries and Whitham equations (2006)
Grava, Tamara, Klein, Christian
The Cauchy problem for the Korteweg de Vries (KdV) equation with small dispersion of order $\epsilon^2$, is characterized by the appearance of a zone of rapid modulated oscillations of wave-length of...
Optisches Messen des Drucks mittels druckempfindlicher Farbe (PSP) (2006)
Klein, Christian, Henne, Ulrich, Sachs, Werner, Engler, Rolf
Die PSP-Methode beruht auf dem Prinzip der Deaktivierung photo-chemisch angeregter Moleküle sog. Luminiphore z.B. durch Sauerstoffmoleküle. Insbesondere eignen sich hierfür Pyren- und...
Konrath, Robert, Engler, Rolf, Klein, Christian, Kompenhans, Jürgen
The objectives of the International Vortex Flow Experiment 2 (VFE-2) are to perform new wind-tunnel tests on a delta wing by using modern measurement techniques and to compare these data with results...
Development of PSP Technique for Application on the VFE-2 65° Delta Wing Configuration (2006)
Klein, Christian, Sachs, Werner, Henne, Ulrich, Engler, Rolf, Wiedemann, Andreas, Konrath, Robert
For the International Vortex Flow Experiment 2 (VFE-2) new wind tunnel tests on a NASA delta-wing model by using modern non-intrusive measurement techniques have been performed in the DNW-TWG...
Development of PSP Technique for Application on the VFE- 2 65° Delta Wing Configuration (2006)
Klein, Christian, Sachs, Werner, Henne, Ulrich, Engler, Rolf, Wiedemann, Andreas, Konrath, Robert
Kompenhans, Jürgen, Agocs, Janos, Egami, Yasuhiro, Engler, Rolf, Fey, Uwe, Frahnert, Holger, ...
The experimental investigation of unsteady complex flow fields in wind tunnels requires advanced measurement techniques. The most important of such image based measurement techniques are those for...
Application of Pressure Sensitive Paint -Theory and Pratice- (2006)
Asai, Keisuke, Davies, Alan, Egami, Yasuhiro, Engler, Rolf, Fey, Uwe, Henne, Ulrich, ...
For investigations of pressure distributions on wind tunnel model surfaces with high spatial resolution new experimental techniques, such as Pressure Sensitive Paint (PSP) are required which allow to...
Konrath, Robert, Klein, Christian, Schröder, Andreas, Kompenhans, Jürgen
The progress made at the development of modern flow measurement techniques such as Particle-Image Velocimetry (PIV) and Pressure Sensitive Paint (PSP) allow to provide flow data of increased quality...
Transition Detection on High-Lift devices in DNW-KKK by means of Temperature-Sensitive Paint (2006)
Egami, Yasuhiro, Fey, Uwe, Klein, Christian, Sitzmann, Martin, Wild, Jochen
Temperature-Sensitive Paint (TSP) allows detection of laminar-to-turbulent boundary layer transition on the complete visible aircraft model surface in high spatial resolution. This non-intrusive...
Joint ONERA-DLR PSP measurements for unsteady characterization and future activities (2006)
Klein, Christian, Mérienne, Marie-Claire, Sachs, Werner, Le Sant, Yves
Application of the PSP technique to unsteady aerodynamic flows requires specific measurement instrumentation. First of all, a dedicated paint as pressure sensor has to be designed in order to reduce...
Egami, Yasuhiro, Fey, Uwe, Klein, Christian, Sitzmann, Martin, Wild, Jochen
Transition detection on high-lift devices of a 3D half model using the TSP technique was performed in the DNW-Cologne Cryogenic Wind Tunnel (KKK). A new method using heating foils to enhance...
Unsteady Vortex Behaviour of a Rotating 65° Delta Wing Using Pressure Sensitive Paint (PSP) (2006)
Klein, Christian, Sachs, Werner, Henne, Ulrich, Engler, Rolf, Egami, Yasuhiro, Ondrus, V.
Visualization and measurements of aerodynamic effects on a delta-wing model were conducted using an optical pressure measurement system, based on the pressure-sensitive paint (PSP) technique. A...
Instationäre PSP-Messungen durchgeführt am DLR-PSP Modell im DNW-TWG (2006)
Klein, Christian, Henne, Ulrich, Sachs, Werner, Egami, Yasuhiro, Ondrus, V., Beifuss, U.
Der bisherige Einsatz von drucksensitiven Farben PSP=(Pressure Sensitive Paint) hat gezeigt, dass die flächenhafte, quantitative Druckinformation zum Verständnis aerodynamischer Prozesse von...
Fey, Uwe, Egami, Yasuhiro, Klein, Christian
Transition detection in ‘warm’ wind tunnels can be realized using commercially available IR cameras. In cryogenic testing, IR imaging becomes more difficult because of the reduction in radiated...
Temperaturempfindliche Farbe für einen erweiterten Temperaturbereich (2006)
Egami, Yasuhiro, Fey, Uwe, Klein, Christian, Beifuss, Uwe, Quest, Jürgen, Ondrus, Vladimir
Å�Ü ÈÐ�Ò � ÁÒ×Ø�ØÙØ für Mathematik in den Naturwissenschaften Leipzig (2006)
Christian Klein, Alexey Kokotov, Dmitry Korotkin
Extremal properties of the determinant of the Laplacian in the Bergman metric on the moduli space of genus two Riemann surfaces (revised version: March 2006) by
Rounding of sequences and matrices, with applications (2006)
Benjamin Doerr, Tobias Friedrich, Christian Klein, Ralf Osbild
Abstract. We show that any real matrix can be rounded to an integer matrix in such a way that the rounding errors of all row sums are less than one, and the rounding errors of all column sums as well...
Unbiased rounding of rational matrices (2006)
Benjamin Doerr, Christian Klein
Abstract. Rounding a real-valued matrix to an integer one such that the rounding errors in all rows and columns are less than one is a classical problem. It has been applied to hypergraph coloring,...
Rounding of sequences and matrices, with applications (2006)
Benjamin Doerr, Tobias Friedrich, Christian Klein, Ralf Osbild
Abstract. We show that any real matrix can be rounded to an integer matrix in such a way that the rounding errors of all row sums are less than one, and the rounding errors of all column sums as well...
Unbiased Matrix Rounding (2006)
Doerr, Benjamin, Friedrich, Tobias, Klein, Christian, Osbild, Ralf, Arge, Lars, Freivalds, Rusins
We show several ways to round a real matrix to an integer one in such a way that the rounding errors in all rows and columns as well as the whole matrix are less than one. This is a classical problem...
Hole Detection or: "How Much Geometry Hides in Connectivity?" (2006)
Funke, Stefan, Klein, Christian, Amenta, Nina, Cheong, Otfried
Wireless sensor networks typically consist of small, very simple network nodes without any positioning device like GPS. After an initialization phase, the nodes know with whom they can talk directly,...
Unbiased Rounding of Rational Matrices (2006)
Doerr, Benjamin, Klein, Christian, Arun-Kumar, S., Garg, Naveen
Rounding a real-valued matrix to an integer one such that the rounding errors in all rows and columns are less than one is a classical problem. It has been applied to hypergraph coloring, in...
Numerical solution of the small dispersion limit of Korteweg de Vries and Whitham equations (2005)
Grava, Tamara, Klein, Christian
The Cauchy problem for the Korteweg de Vries (KdV) equation with small dispersion of order $\epsilon^2$, is characterized by the appearance of a zone of rapid modulated oscillations of wave-length of...
Proteomanalysen an Halobacterium salinarum (2005)
Im Rahmen dieser Arbeit wurden verschiedene Proteome von H. salinarum untersucht, die nach zellulären Kompartimenten unterschieden wurden in (1) das Flagellarmotor-Proteom (2) das Cytosolproteom und...
Proteomanalysen an Halobacterium salinarum (2005)
Im Rahmen dieser Arbeit wurden verschiedene Proteome von H. salinarum untersucht, die nach zellulären Kompartimenten unterschieden wurden in (1) das Flagellarmotor-Proteom (2) das Cytosolproteom und...
Modern optical methods for the investigation of flows in aerodynamic (2005)
Kompenhans, Jürgen, Schröder, Andreas, Klein, Christian, Engler, Rolf, Fey, Uwe, Konrath, Robert, ...
During the last decade several advanced non-intrusive image based measurement techniques such as pressure sensitive paint (PSP) for pressure measurements on the complete surface of a model in the...
Kompenhans, Jürgen, Engler, Rolf, Fey, Uwe, Frahnert, Holger, De Groot, Klaus, Henne, Ulrich, ...
The experimental investigation of unsteady complex flow fields in wind tunnels requires advanced measurement techniques. The most important of such image based measurement techniques are those for...
Henne, Ulrich, Höhler, Gebhard, Klein, Christian, Rein, Martin, Sachs, Werner, Schütte, Andreas
Es werden Ergebnisse von Druck-, Kraft- und Momentenmessungen am X-31 RC-Modell beschrieben. Die Messungen fanden im September 2004 am DNW-NWB im Rahmen des Projektes SikMa statt. Die Bestimmung der...
PSP and TSP Measurements in Different Facilities (2005)
Engler, Rolf, Klein, Christian, Henne, Ulrich, Sachs, Werner, Fey, Uwe
Klein, Christian, Engler, Rolf, Sachs, Werner, Henne, Ulrich
The Visualization and measurements of aerodynamic effects on a three-dimensional aircraft model were conducted using an optical pressure measurement system, based on the Pressure Sensitive Paint...
Konrath, Robert, Schröder, Andreas, Klein, Christian, Frahnert, Holger, Kompenhans, Jürgen
The progress made at the development of modern flow measurement techniques as Particle-Image Velocimetry (PIV) and Pressure Sensitive Paint (PSP) allow to provide flow data of increased quality and...
Modern optical methods for the investigation of flows in aerodynamic (2005)
Kompenhans, Jürgen, Schröder, Andreas, Klein, Christian, Engler, Rolf, Fey, Uwe, Konrath, Robert, ...
During the last decade several advanced non-intrusive image based measurement techniques such as pressure sensitive paint (PSP) for pressure measurements on the complete surface of a model in the...
Engler, Rolf, Fey, Uwe, Henne, Ulrich, Klein, Christian, Sachs, Werner
The pressure sensitive paint (PSP) intensity and lifetime system is an optical measurement technique to investigate absolute pressure fields on model surfaces for basic research in laboratories,...
Kompenhans, Jürgen, Fey, Uwe, Henne, Ulrich, Klein, Christian, Sachs, Werner, Frahnert, Holger, ...
The experimental investigation of unsteady complex flow fields in wind tunnels requires advanced measurement techniques. The most important of such image based measurement techniques are those for...
Application of PSP Measurement Technique in Propeller Flows – A400m FLA5.2 Model in LSWT (2005)
Henne, Ulrich, Klein, Christian, Sachs, Werner, De Groot, Klaus
Light Emitting Surfaces of Wind Tunnel Models for Excitation of Pressure Sensitve Paint (2005)
Schulze, Bernd, Klein, Christian
The illumination of PSP-coated surfaces on a wind tunnel model by electro-luminescent surface layers has been tested in the laboratory as well as in the wind tunnel. All pressure data gathered by...
Stefan Funke, Christian Klein, Kurt Mehlhorn, Susanne Schmitt
controlled perturbation, floating
Individual Investor Sentiment and Stock Returns- What Do We Learn from Warrant Traders? (2005)
Markus Glaser, Martin Weber, Christian Klein, Er Klos, Michael Meffert
In this paper, we propose a measure of individual investor sentiment that is derived from the market for bank-issued warrants. Due to a unique warrant transaction data set from a large German...
Controlled Perturbation for Delaunay Triangulations (2005)
Funke, Stefan, Klein, Christian, Mehlhorn, Kurt, Schmitt, Susanne
Most geometric algorithms are idealistic in the sense that they are designed for the Real-RAM model of computation and for inputs in general position. Real inputs may be degenerate and floating point...
Klein, Christian, Niebergall, S., Sachs, Werner, Henne, Ulrich, Engler, Rolf H.
Pressure field measurements on a Linear Plug Nozzle model were conducted to evaluate the feasibility and accuracy of measurements using DLR’s Pressure Sensitive Paint (PSP) system in the high-speed...
Klein, Christian, Henne, Ulrich, Sachs, Werner, Engler, Rolf H.
Visualization and measurements of aerodynamic effects on the three-dimensional aircraft model were conducted using an optical pressure measurement system, based on the Pressure Sensitive Paint (PSP)...
Niedergall, Steffen, Klein, Christian, Sachs, Werner, Henne, Ulrich, Engler, Rolf
Im Rahmen eines von ESA/ESTEC beauftragten Forschungsvorhabens zur Nutzbarmachung zukünftiger Antriebsdüsentechnologien wurden am untertage Hochgeschwindigkeitswindkanal (HWK) der TU Dresden in...
Frankfurt (Main), Univ., Diss., 2004 (Nicht für den Austausch).
Frankfurt (Main), Univ., Diss., 2004.
NoSEBrEaK - Attacking Honeynets (2004)
Maximillian Dornseif, Thorsten Holz, Christian Klein
It is usually assumed that Honeynets are hard to detect and that attempts to detect or disable them can be unconditionally monitored. We scrutinize this assumption and demonstrate a method how a host...
Max-Planck-Institut für Informatik in Saarbrücken angefertigt. Hiermit erkläre ich an Eides Statt, daß ich diese Diplomarbeit selbstständig verfaßt und nur die angegebenen Quellen und...
Technical Analysis as a Method of Risk Management (2003)
Dorfleitner, Gregor, Klein, Christian
While the academic world is still discussing if charting works or if it is more or less something like "Voodoo finance", the practical orientated world has been using technical analysis for decades....
Klein, Christian, Sachs, Werner, Henne, Ulrich, Wiedemann, Andreas, Engler, Rolf
Bisher wurde für industrielle Messungen im transsonischen Geschwindigkeitsbereich ausschließlich die PSP-Farbe B1 der Fa. Optrod (Russland) verwendet. Dieses war insbesondere in Windkanälen des...
Optische Erfassung von flächigen Druckverteilungen mittels Pressure Sensitive Paint - PSP (2003)
Die PSP-Methode beruht auf dem Prinzip der Deaktivierung photo-chemisch angeregter Moleküle sog. Luminiphore z.B. durch Sauerstoffmoleküle. Insbesondere eignen sich hierfür Pyren- und...
We review explicit solutions to the stationary axisymmetric Einstein-Maxwell equations which can be interpreted as disks of charged dust. The disks of finite or infinite extension are infinitesimally...
Exact relativistic treatment of stationary black hole disk systems (2003)
We present and discuss a class of exact solutions to the stationary axisymmetric Einstein equations which describe a regular black hole surrounded by a disk of infinite extension with finite inner...
Leistungsdiagnostische Kenngrössen im Hochleistungsradsport [microform] / (2003)
Thesis (doctoral)--Albert-Ludwigs-Universität Freiburg im Breisgau, 2003.
Martin Emrich, Tutors Tim Priesnitz, Thomas Klöcker, Christian Klein, Gert Smolka
This presentation is about MONA, an MSO theorem prover using BDDs (binary decision diagrams) and finite-state automata. We will show what it can do and shed some light on its internal optimization...
Die monetäre Bewertung der Walderholung mittels der contingent-valuation-method (2002)
Die Ertragskrise der Forstwirtschaft wirkt indirekt auf das Erholungsangebot des Waldes. Erholungsleistungen, die früher problemlos aus erwirtschafteten Überschüssen bereitgestellt werden konnten,...
Der Einfluss von Spülen und Absaugen auf die biologische Reaktion nach Markraumbohrung (2002)
Ziel der Arbeit war die Bewertung des Reamer Irrigator Aspirator-Prototyps in Bezug auf seine Effektivität betreffend der Reduktion der Fettverpressung und seine Auswirkungen auf die...
Factual and Legal Risks regarding wireless Computer Networks (2002)
Dornseif, Maximillian, Schumann, Kay, Klein, Christian
The IEEE 802.11b wireless ethernet standart has several serious security flaws. This paper describes this flaws, surveys wireless networks in the Cologne/Bonn area to get an assessment of the...
Application of PSP in low speed flows (2002)
Engler, Rolf H., Mérienne, M.C., Klein, Christian, Le Sant, Y.
Since low speed tests play an important role for the design phase of aircraft’s, the PSP technology has to be developed also for small pressure variations in the pressure range between 800 and...
Ce travail présente une discussion d'aspects mathématiques et physiques des solutions des équations d'Einstein et d'Einstein-Maxwell dans le cas stationnaire avec symétrie axiale, obtenues par...
Ce travail présente une discussion d'aspects mathématiques et physiques des solutions des équations d'Einstein et d'Einstein-Maxwell dans le cas stationnaire avec symétrie axiale, obtenues par...
Ce travail présente une discussion d'aspects mathématiques et physiques des solutions des équations d'Einstein et d'Einstein-Maxwell dans le cas stationnaire avec symétrie axiale, obtenues par...
Hannover, Univ., Diss., 2002 (Nicht für den Austausch).
Hannover, Univ., Diss., 2002.
Die Ertragskrise der Forstwirtschaft wirkt indirekt auf das Erholungsangebot des Waldes. Erholungsleistungen, die früher problemlos aus erwirtschafteten Überschüssen bereitgestellt werden konnten,...
Der Einfluss von Spülen und Absaugen auf die biologische Reaktion nach Markraumbohrung (2002)
Ziel der Arbeit war die Bewertung des Reamer Irrigator Aspirator-Prototyps in Bezug auf seine Effektivität betreffend der Reduktion der Fettverpressung und seine Auswirkungen auf die...
Frauendiener, Joerg, Klein, Christian
This is the third in a series of papers on the construction of explicit solutions to the stationary axisymmetric Einstein equations which can be interpreted as counter-rotating disks of dust. We...
This is the second in a series of papers on the construction of explicit solutions to the stationary axisymmetric Einstein equations which can be interpreted as counter-rotating disks of dust. We...
This is the first in a series of papers on the construction of explicit solutions to the stationary axisymmetric Einstein equations which describe counter-rotating disks of dust. These disks can...
360° PSP Measurements in Transonic Flow (2001)
Engler, Rolf H., Klein, Christian, Merlo, Emanuele, Amerom, Piet Van
Object Management Group – Telecom Distributed Accounting Facility (2001)
Benjamin Doerr, Tobias Friedrich, Christian Klein, Ralf Osbild
Abstract. We show several ways to round a real matrix to an integer one such that the rounding errors in all rows and columns as well as the whole matrix are less than one. This is a classical...
Die monetäre Bewertung der Walderholung mittels der contingent-valuation-method (2001)
Die Ertragskrise der Forstwirtschaft wirkt indirekt auf das Erholungsangebot des Waldes. Erholungsleistungen, die früher problemlos aus erwirtschafteten Überschüssen bereitgestellt werden konnten,...
Pressure Sensitive Paint (PSP) Measurements in a Low-Speed Wind Tunnel (2000)
Klein, Christian, Engler, Rolf H., Fonov, Sergey, Trinks, Ole
Klein, Christian, Engler, Rolf H.
Visualization of aerodynamic effects on a three-dimensional double-delta wing aircraft model was conducted using an optical pressure measurement system, based on the Pressure Sensitive Paint (PSP)...
Engler, Rolf H., Klein, Christian, Fonov, Sergey, Butefisch, Karl-Aloys, Bock, Kari-Wilhelm
Since the need for improvements in high angle-of-attack maneuverability of aircraft's in transonic flight was of concern, a model was rotated around its longitudinal body axis with a dimensionless...
Thesis (Ph. D.)--Georg-August-Universitat zu Gottingen, 1998.
Mikroreprod. eines Ms. 55 Bl. : Ill., graph. Darst.
Thèse Droit, Zurich, 1970.
Thesis--Friedrich-Alexander-Univ. Erlangen-Nürnberg, 1970.
Proefschrift Zürich.
Hyperelliptic theta functions and spectral methods
Frauendiener,Joerg, Klein,Christian
A code for the numerical evaluation of hyperelliptic theta-func\-tions is presented. Characteristic quantities of the underlying Riemann surface such as its periods are determined with the help of...
Kokoeva, Maia V., Storch, Kai-Florian, Klein, Christian, Oesterhelt, Dieter
Directly upstream of the Halobacterium salinarum transducer genes basT and htpIV we identified two open reading frames (orfs) with significant homologies to genes encoding binding proteins for amino...
Klein, Christian, Wüstefeld, Torsten, Assmus, Ulrike, Roskams, Tania, Rose-John, Stefan, Müller, Michael, ...
Increasing evidence demonstrates that IL-6 has a protective role during liver injury. IL-6 activates intracellular pathways via the gp130 receptor. In order to identify IL-6–gp130 pathways involved...
VOGEL, ARNDT, ASLAN, JOSEPH E., WILLENBRING, HOLGER, KLEIN, CHRISTIAN, FINEGOLD, MILTON, MOUNT, HOWARD, ...
Kokoeva, Maia V., Storch, Kai-Florian, Klein, Christian, Oesterhelt, Dieter
Directly upstream of the Halobacterium salinarum transducer genes basT and htpIV we identified two open reading frames (orfs) with significant homologies to genes encoding binding proteins for amino...
Klein, Christian, Wüstefeld, Torsten, Assmus, Ulrike, Roskams, Tania, Rose-John, Stefan, Müller, Michael, ...
Increasing evidence demonstrates that IL-6 has a protective role during liver injury. IL-6 activates intracellular pathways via the gp130 receptor. In order to identify IL-6–gp130 pathways involved...
Hyperelliptic theta functions and spectral methods
Frauendiener, Joerg, Klein, Christian
A code for the numerical evaluation of hyperelliptic theta-func\-tions is presented. Characteristic quantities of the underlying Riemann surface such as its periods are determined with the help of...
Psychological barriers in European stock markets: Where are they?
Dorfleitner, Gregor, Klein, Christian
We examine four European stock indices and the prices of eight major German stocks for indications of psychological barriers. The frequency, (expected) returns, intraday volatility and trading volume...
Schrödl, Nicolas, Klein, Christian
Regulators' expectations to the IFRS introduction are high. In our analyses we measure by different variables for market liquidity how inter alia reporting quality and investors' preference developed...
Reconsidering the impact of national soccer results on the FTSE 100
Christian Klein, Bernhard Zwergel, J. Henning Fock
In past decades, many empirical studies revealed return anomalies in many different asset classes and markets. Very recent publications have, however, even found evidence that stock markets react to...