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Marc Walter, Daniel Sollberger, Sebastian Euler: Persönlichkeitsstörungen und Sucht

2016 Swiss Archives of Neurology, Psychiatry and Psychotherapy  
Die Kollegen Walter, Sollberger und Euler sind sehr erfahrene psychotherapeutisch/psychiatrische Kliniker.  ...  Die Kollegen Walter, Sollberger und Euler sind sehr erfahrene psychotherapeutisch/psychiatrische Kliniker.  ... 
doi:10.4414/sanp.2016.00413 fatcat:f2vkykumerentlvyrogkbss3um

Reseña de Text, autor und wissen in der "historiografía indiana" der Frühen Neuzeit / Sebastian Greusslich. Berlín/Boston: Walter de Gruyter, 2012

Marta Fernández Alcaide
2012 Revista de Historia de la Lengua Española  
doi:10.54166/rhle.2012.07.15 fatcat:akka7zwq4vebjfw63at6nmdugq

Correspondencia 1930-1940, de Gretel Adorno y Walter Benjamin

Sebastián Cabezas
2013 Crítica Penal y Poder  
Berlín, París, Eivissa, San Remo, Skovsbostrand, Londres, Nova York, entre altres ciutats, es van transformar en l'escenari on es va desenvolupar la frondosa Correspondencia entre Walter Benjamin -Detlef  ...  Sebastián Cabezas Chamorro  Revista Crítica Penal y Poder. 2013, nº 4, marzo (pp. 201-205) OSPDH.  ...  Sebastián Cabezas Chamorro  Revista Crítica Penal y Poder. 2013, nº 4, marzo (pp. 201-205) OSPDH. Universidad de Barcelona Recientemente disponible en versión castellana en Benjamin, W.  ... 
doaj:4506fee1025d4f47b7384a2a93d9dbdf fatcat:avi3s2ckq5cvrhttwsfdwd6s44

Kieker4Dql: Declarative Performance Measurement [article]

Matthias Blohm, Sebastian Vogel, Maksim Pahlberg, Jürgen Walter, Dušan Okanović
2016 Zenodo  
Contains: runnable example instructions
doi:10.5281/zenodo.61281 fatcat:7uzt5tetifhbbahttzbzjsltme

Sebastian Neumeister (ed.), Baltasar Gracián: Antropología y estética. Actas del II Coloquio Internacional (Berlín, 4-7 de octubre de 2001). Edition Tranvía-Verlag Walter Frey, Berlin, 2004; 336 pp

Pablo Sol Mora
2005 Nueva Revista de Filología Hispánica  
En el primero, "Sustancia y apariencia: el pavo real de Gracián"; Sebastian Neumeister estudia el tema archibarroco del ser NRFH, LUI RESEÑAS 563 y el parecer centrado en la fábula del pavón contenida  ... 
doi:10.24201/nrfh.v53i2.2300 fatcat:6bvxcxe2erdkthcodsusarca5q

Sebastian Kürschner. 2008. Deklinationsklassen-Wandel. Eine diachron-kontrastive Studie zur Entwicklung der Pluralallomorphie im Deutschen, Niederländischen, Schwedischen und Dänischen (Studia Linguistica Germanica 92). Berlin, New York: Walter de Gruyter. xii, 410 S

Claudia Wich-Reif
2010 Zeitschrift für Rezensionen zur Germanistischen Sprachwissenschaft  
Sebastian Kürschner.  ... 
doi:10.1515/zrs.2010.018 fatcat:peojq3hm5fcxvamhb5scockm74

Colonoscopy Pain Reaction Biopotential Database - CPRB

Steffen Walter, Sascha Gruss, Sebastian Goetze, Philipp Werner, Alexander Hann
2019 Zenodo  
Walter et al. [7] showed that recognition rates resulting from multimodal fusions were significantly better than unimodal recognition rates in 70% of all individual tests.  ... 
doi:10.5281/zenodo.3457611 fatcat:hys3ymsvjrbshgzjx5siydcdni

Burkert, Walter. De Homero a los magos. La tradición oriental en la cultura griega

Juan Sebastián Cruz Camacho
2009 Literatura: Teoría, Historia, Crítica  
Pero, contrario a muchas interpretaciones Departamento de Literatura • Facultad de Ciencias Huamanas Burkert, Walter. De Homero a los magos. La tradición oriental en la cultura griega.  ...  Juan Sebastián Cruz Camacho Universidad Nacional de Colombia -Bogotá • Iriarte, Ana, y Marta González. Entre Ares y Afrodita: violencia del erotismo y erótica de la violencia en la Grecia Antigua.  ... 
doaj:ea272e40f37b41f49c8f08a89caa2ac1 fatcat:heannwqgzrgnxkgrwa73c2kxam

Remote near infrared identification of pathogens with multiplexed nanosensors

Robert Nißler, Oliver Bader, Maria Dohmen, Sebastian G. Walter, Christine Noll, Gabriele Selvaggio, Uwe Groß, Sebastian Kruss
2020 Nature Communications  
AbstractInfectious diseases are worldwide a major cause of morbidity and mortality. Fast and specific detection of pathogens such as bacteria is needed to combat these diseases. Optimal methods would be non-invasive and without extensive sample-taking/processing. Here, we developed a set of near infrared (NIR) fluorescent nanosensors and used them for remote fingerprinting of clinically important bacteria. The nanosensors are based on single-walled carbon nanotubes (SWCNTs) that fluoresce in
more » ... NIR optical tissue transparency window, which offers ultra-low background and high tissue penetration. They are chemically tailored to detect released metabolites as well as specific virulence factors (lipopolysaccharides, siderophores, DNases, proteases) and integrated into functional hydrogel arrays with 9 different sensors. These hydrogels are exposed to clinical isolates of 6 important bacteria (Staphylococcus aureus, Escherichia coli,...) and remote (≥25 cm) NIR imaging allows to identify and distinguish bacteria. Sensors are also spectrally encoded (900 nm, 1000 nm, 1250 nm) to differentiate the two major pathogens P. aeruginosa as well as S. aureus and penetrate tissue (>5 mm). This type of multiplexing with NIR fluorescent nanosensors enables remote detection and differentiation of important pathogens and the potential for smart surfaces.
doi:10.1038/s41467-020-19718-5 pmid:33239609 fatcat:okd3ewo655cozewuisbp66owg4

Efficient Higher Order Derivatives of Objective Functions Composed of Matrix Operations [article]

Sebastian F. Walter
2009 arXiv   pre-print
This paper is concerned with the efficient evaluation of higher-order derivatives of functions f that are composed of matrix operations. I.e., we want to compute the D-th derivative tensor ∇^D f(X) ∈ R^N^D, where f: R^N→ R is given as an algorithm that consists of many matrix operations. We propose a method that is a combination of two well-known techniques from Algorithmic Differentiation (AD): univariate Taylor propagation on scalars (UTPS) and first-order forward and reverse on matrices. The
more » ... combination leads to a technique that we would like to call univariate Taylor propagation on matrices (UTPM). The method inherits many desirable properties: It is easy to implement, it is very efficient and it returns not only ∇^D f but yields in the process also the derivatives ∇^d f for d ≤ D. As performance test we compute the gradient ∇ f(X) and reverse mode of f(X) = (X^-1) in the reverse mode of AD for X ∈ R^n × n. We observe a speedup of about 100 compared to UTPS. Due to the nature of the method, the memory footprint is also small and therefore can be used to differentiate functions that are not accessible by standard methods due to limited physical memory.
arXiv:0911.4940v1 fatcat:2ei57jyoujfoph6awx3djobfpy

Building hierarchical martensite [article]

Stefan Schwabe, Robert Niemann, Anja Backen, Daniel Wolf, Christine Damm, Tina Walter, Hanus Seiner, Oleg Heczko, Kornelius Nielsch, Sebastian Fähler
2020 arXiv   pre-print
, Hanus Seiner, Oleg Heczko, Kornelius Nielsch, and Sebastian Fähler Fig. i Supplementary for: Building hierarchical martensite  ...  -type X aMM-7bMM with C minority E -type Y aMM-7bMM with F majority F -type Y aMM+7bMM with E minority Stefan Schwabe, Robert Niemann, Anja Backen, Daniel Wolf, Christine Damm, Tina Walter  ... 
arXiv:2004.09768v1 fatcat:4sgbpfip4vg2zmzkc5z62a26me

Memory modulates color appearance

Thorsten Hansen, Maria Olkkonen, Sebastian Walter, Karl R Gegenfurtner
2006 Nature Neuroscience  
We asked human observers to adjust the color of natural fruit objects until they appeared achromatic. The objects were generally perceived to be gray when their color was shifted away from the observers' gray point in a direction opposite to the typical color of the fruit. These results show that color sensations are not determined by the incoming sensory data alone, but are significantly modulated by high-level visual memory. Visual perception is inherently constructive and creative in nature,
more » ... and frequently, additional assumptions and constraints are necessarily involved in generating a specific visual sensation 1 . Color is a particularly ill-posed problem, because the light entering our eyes is the product of the illumination and the surface reflectance of the object and therefore changes considerably when the illumination changes. Still, we are able to reliably perceive the color of objects. There are several known mechanisms involved in this process. Some mechanisms act on a local scale, computing cone excitation ratios across edges, whereas others act on a more global scale, computing the average color over larger image regions 2 . What these mechanisms have in common is that they are driven solely by the visual signals arising from the retina. Here we investigated whether the known color of objects also affects color appearance. Many natural and man-made objects have a typical or diagnostic color, which is termed their memory color. This knowledge could be used to guide our visual system in the process of assigning colors to objects and in discounting the illuminant. Previous studies have demonstrated that the memory color can be distinct from the measured color of the objects and is typically more saturated (refs. 3-9; and A. Hurlbert & Y. Ling, J. Vis. 5, 787a, 2005). However, the results of these studies were highly variable, and, because the subjects in these studies could never directly change the colors of the objects under investigation, it is not clear whether the effects were of a perceptual nature. We presented digitized photographs of natural fruit objects on a uniform gray background. The color of the fruit objects could be interactively manipulated to produce, for example, bananas of any arbitrary color. This, of course, poses the question: what does a blue banana look like? We used an adjustment method in which we started with the original color image and then allowed the subject to interactively scale and rotate the whole distribution of pixels in color space ( Fig. 1 and Supplementary Methods online). This method satisfies the constraint that a gray banana under a neutral illumination should be achromatic: all pixels vary only along a luminance axis but not in their chromaticity. For all other settings, the banana was characterized by a whole distribution of chromaticities, and the relationship between relative saturation and luminance was kept stable. Our subjects had to adjust the color of the fruit objects until they appeared gray. In a different set of experiments, we asked the same subjects to adjust the color of the fruit objects until they appeared natural. It was evident that the settings for the banana (Fig. 2a) deviated from the neutral gray adaptation point at the origin of the color space, in the direction opposite to the typical setting (t 13 ¼ 6.915, P o 0.001). In actual fact, subjects adjusted the banana to a slightly bluish hue-its opponent color-in order for it to appear neutral gray. At the point where the banana was actually achromatic, at the origin of the color space, it still appeared yellowish. A similar effect was obtained for the other fruit objects we investigated (Fig. 2b) . As a control, we asked our subjects to adjust uniform spots of light and random noise patches (Supplementary Methods), which do not have an association with a typical color. The settings for these stimuli (Fig. 2b) did not differ significantly from the neutral gray background (t 13 ¼ 1.39, P 4 0.05), but the difference between the controls and the fruit setting was significant (t 13 ¼ 4.22, P o 0.001). To quantify the memory color effect, we determined how far from the neutral control stimuli the subjects adjusted the fruits in the direction away from their typical setting. We then normalized the memory color index by dividing through the distance between the control settings and the fruit's typical -10 -5 0 5 10 -90 -45 0 45 90 (L + M) -S (% cone contrast) a b L -M (% cone contrast) Figure 1 The chromatic adjustment method. (a) The distribution of chromaticities in the original photograph of the banana (yellow) in the isoluminant plane of a color space spanned by an L -M axis and an (L + M) -S axis. Subjects could adjust the color of the stimulus in two dimensions. This was achieved by rotating and scaling the whole distribution of chromaticities (for example, toward magenta). The black cross indicates the mean of the distribution and how it changes when it is rotated by 901 and its amplitude scaled to 70%. (b) Stimuli corresponding to the two chromatic distributions shown in a. © 2006 Nature Publishing Group http://www.nature.com/natureneuroscience setting (Supplementary Methods). The indices varied between 4-13% for the different fruit objects (mean ¼ 8.23%, t 13 ¼ 6.195, P o 0.001). This amounts to an effect that is approximately three to five times above the threshold of discrimination. The effect was highly reliable even for individual observers. All 14 subjects had positive memory color indices, indicating that they all adjusted the fruits in the direction opposite to their typical settings. In previous studies on memory color, subjects had to either view an object or recall its color from memory, and then pick a matching color from a set of colors. In our study, observers could actually manipulate the color of the object while viewing it, without the need for a cognitive retrieval of memory during the adjustment procedure. Rather, memory seemed to have a direct top-down effect that continuously modulated the incoming sensory data and changed basic color sensations. Our results show that natural fruit objects tend to be perceived in their typical color. Objects with a typical color might seem to constitute only a small percentage of the objects surrounding us, but one has to keep in mind that our visual system evolved in a world that was not filled with man-made objects of arbitrary color. Another question posed by our results is whether they are applicable to the type of lighting conditions occurring naturally. Notably, natural illumination during the course of the day varies mostly along the blueyellow dimension 10 . Natural daylight contains a high proportion of short-wavelength energy in the morning and gradually shifts toward energy of longer wavelengths during the course of the day. Most fruit objects are yellowish rather than bluish; therefore, they might appear grayish in the morning, as color constancy is known to be imperfect even in realistic situations 11 . The appearance shifts described here may contribute toward color constancy under these conditions. Our results show a high-level cognitive effect on low-level perceptual mechanisms. Our knowledge of the world affects our perception, very much in the way that Bayesian modeling has predicted in many settings 1 . Just as we apply prior knowledge that the light usually comes from above 12 , we apply prior knowledge about the natural color of fruit objects. This knowledge is used together with other local and global information about the scene to determine color appearance. This allows the visual system to function and perform even under reduced conditions when only single objects are shown under an unknown illuminant, as in our experiments. The mechanisms that determine color appearance act throughout all processing stages of the visual system, from the retina to visual cortex including visual memory. Modulatory feedback is a candidate neural mechanism underlying the integration of bottom-up incoming data and topdown expectations 13,14 .
doi:10.1038/nn1794 pmid:17041591 fatcat:t6fpcpsf3zcaxm7hmy2udzqik4

Ionoacoustic detection of swift heavy ions [article]

Sebastian Lehrack, Walter Assmann, Markus Bender, Daniel Severin, Christina Trautmann, Jörg Schreiber, Katia Parodi
2019 arXiv   pre-print
The maximum energy loss (Bragg peak) located near the end of range is a characteristic feature of ion stopping in matter, which generates an acoustic pulse, if ions are deposited into a medium in adequately short bunches. This so-called ionoacoustic effect has been studied for decades, mainly for astrophysical applications, and it has recently found renewed interest in proton therapy for precise range measurements in tissue. After detailed preparatory studies with 20 MeV protons at the MLL
more » ... m accelerator, ionoacoustic range measurements were performed in water at the upgraded SIS18 synchrotron of GSI with 238U and 124Xe ion beams of energy about 300 MeV/u, and 12C ions of energy about 200 MeV/u using fast beam extraction to get 1 microsecond pulse lengths. Acoustic signals were recorded in axial geometry by standard piezo-based transducers at a 500 kHz mean frequency and evaluated in both the time and frequency domains. The resulting ranges for the different ions and energies were found to agree with Geant4 simulations as well as previous measurements to better than 1%. Given the high accuracy provided by ionoacoustic range measurements in water and their relative simplicity, we propose this new method for stopping power measurements for heavy ions at GeV energies and above. Our experimental results clearly demonstrate the potential of an ionoacoustic particle monitor especially for very intense heavy ion beams foreseen at future accelerator facilities.
arXiv:1903.12170v1 fatcat:qf5gzz62xjdotjz4dxynushy74

El pasado se hace presente. Una aproximación a la problemática del aura en la obra de Walter Benjamin

Sebastián Matías Stra
2018 Question  
La temática del aura atraviesa algunas constituciones fundamentales en la obra de Walter Benjamin.  ...  Una aproximación a la problemática del aura en la obra de Walter Benjamin Question, Vol. 1, N.º 59, julio-septiembre 2018.  ...  Una aproximación a la problemática del aura en la obra de Walter Benjamin Question, Vol. 1, N.º 59, julio-septiembre 2018.  ... 
doi:10.24215/16696581e068 fatcat:tv6hic5cn5fxfn6ufueqj5jiem

Lightcuts

Bruce Walter, Sebastian Fernandez, Adam Arbree, Kavita Bala, Michael Donikian, Donald P. Greenberg
2005 ACM Transactions on Graphics  
Details are in [Walter 2005 ]. We tested all our bounds numerically to confirm that they are valid.  ...  [Walter et al. 1997 ] use them for hardware accelerated walkthroughs of precomputed global illumination solutions.  ... 
doi:10.1145/1073204.1073318 fatcat:6eggrejljnfmxpyzztfshafkxq
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