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Search Results: 1 - 10 of 403801 matches for " Christina M. Gschwandtner "
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Paul Ric ur and the Relationship Between Philosophy and Religion in Contemporary French Phenomenology Paul Ric ur and the Relationship Between Philosophy and Religion in Contemporary French Phenomenology
Christina M. Gschwandtner
études Ricoeuriennes / Ricoeur Studies , 2012, DOI: 10.5195/errs.2012.147
Abstract: In this paper I consider Ric ur’s negotiation of the boundary or relationship between philosophy and religion in light of the larger debate in contemporary French philosophy. I suggest that contrasting his way of dealing with the intersection of the two discourses to that of two other French thinkers (Jean-Luc Marion and Michel Henry) illuminates his stance more fully. I begin with a brief outline of Ric ur’s claims about the distinction or relation between the discourses, then reflect on those of Marion and Henry, who although they do not relate them in the same way still together form a significant contrast to Ric ur’s perspective, and conclude with a fuller consideration of Ric ur’s methodology in light of this comparison. I suggest that it is in particular his hermeneutic commitments that lead him both to more rigorous distinctions between discourses and ironically to greater mediation. Det article analyse la manière dont Ricoeur pense la frontière ou la relation entre philosophie et religion à lalumière du débat plus large sur la philosophie fran aise contemporaine. Le contraste entre sa fa on detraiter l' intersection entre les deux discours et celle de deux autres penseurs fran ais (Jean--‐ Luc Marion etMichel Henry) éclaire sa position plus en profondeur. J' entame mon propos par un bref aper u des objectifsde Ricoeur s' agissant de la distinction ou de la relation entre les deux discours, puis je poursuis la réflexionen exposant les objectifs de Marion et de Henry. Bien que chacun de ces deux penseurs converge vers unevoie qui lui est propre, ils forment ensemble un contraste saisissant avec la perspective de Ricoeur. Je conclusmon article en prenant mieux en compte la méthodologie de Ricoeur à la lumière de cette comparaison.C' est en particulier ses engagements herméneutiques qui le conduisent à la fois à plus de distinctionsrigoureuses entre les discours et ironiquement à une plus grande médiation entre eux.
Mitgehangen - mitgefangen: Zwei ungew hnliche F lle von Embolieprotektion durch einen Führungsdraht
Haumer M,Gschwandtner M,Minar E
Zeitschrift für Gef??medizin , 2008,
Abstract:
Stammzelltherapie bei PAVK
Kopp CW,Gschwandtner M,Minar E,Steiner-B?ker S
Zeitschrift für Gef??medizin , 2005,
Abstract: Die autologe Stammzelltransplantation zur Induktion therapeutischer Angiogenese stellt eine potentiell beinerhaltende Therapieoption bei chronisch kritischer Extremit tenisch mie bei Patienten ohne chirurgische oder interventionelle Revaskularisationsm glichkeit dar. Die folgende übersicht soll das zugrundeliegende Konzept dieses Therapieansatzes und klinische Richtlinien für die Aussch pfung des angiogenetischen Potentials von Knochenmarksstammzellen vorstellen. Im Ausblick werden die "Stammzell-Mobilisation" und das gezielte "Homing" als Alternative zur Stammzelltransplantation umrissen.
Dendritic inhibition mediated by O-LM and bistratified interneurons in the hippocampus
Christina Müller
Frontiers in Synaptic Neuroscience , 2014, DOI: 10.3389/fnsyn.2014.00023
Abstract: In the CA1 region of the hippocampus pyramidal neurons and GABAergic interneurons form local microcircuits. The CA1 interneurons are a diverse group consisting of many subtypes, some of which provide compartment-specific inhibition specifically onto pyramidal neuron dendrites. In fact, the majority of inhibitory synapses on pyramidal neurons is found on their dendrites. The specific role of a dendrite-innervating interneuron subtype is primarily determined by its innervation pattern on the distinct dendritic domains of pyramidal neurons. The efficacy of dendritic inhibition in reducing dendritic excitation depends on the relative timing and location of the activated excitatory and inhibitory synapses. In-vivo, synaptic properties such as short-term plasticity and neuro-modulation by the basal forebrain, govern the degree of inhibition in distinct dendritic domains in a dynamic, behavior dependent manner, specifically during network oscillation such as the theta rhythm. In this review we focus on two subtypes of dendrite-innervating interneurons: the oriens-lacunosum moleculare (O-LM) interneuron and the bistratified interneuron. Their molecular marker profile, morphology, and function in-vivo and in-vitro are well studied. We strive to integrate this diverse information from the cellular to the network level, and to provide insight into how the different characteristics of O-LM and bistratified interneurons affect dendritic excitability, network activity and behavior.
The Effects of Substructure on Galaxy Cluster Mass Determinations
Christina M. Bird
Physics , 1995, DOI: 10.1086/187895
Abstract: Although numerous studies of individual galaxy clusters have demonstrated the presence of significant substructure, previous studies of the distribution of masses of galaxy clusters determined from optical observations have failed to explicitly correct for substructure in those systems. In this {\it Letter} I present the distributions of velocity dispersion, mean separation, and dynamical masses of clusters when substructure is eliminated from the cluster datasets. I also discuss the changes in these distributions because of the substructure correction. Comparing the masses of clusters with central galaxies before and after correction for the presence of substructure reveals a significant change. This change is driven by reductions in the mean separation of galaxies, not by a decrease in the velocity dispersions as has generally been assumed. Correction for substructure reduces most significantly the masses of systems with cool X-ray temperatures, suggesting that the use of a constant linear radius (1.5$h _{100} ^{-1}$ Mpc in this study) to determine cluster membership is inappropriate for clusters spanning a range of temperatures and/or morphologies.
Substructure in Clusters and Central Galaxy Peculiar Velocities
Christina M. Bird
Physics , 1994, DOI: 10.1086/116973
Abstract: Formation theories for central dominant galaxies in clusters require them to be located at the minimum of the cluster gravitational potential. However, 32\% (8 out of 25) of the clusters with more than 50 measured redshifts have central galaxies with significant velocity offsets (with respect to other cluster members). By studying their velocity distributions and correlations between velocity and position, I show that the presence of a large peculiar velocity is strongly correlated with the presence of substructure in these massive systems. About 85\% (21 of 25) of all well-studied clusters show some evidence for substructure, in contrast to the 30-40\% found when using only galaxy or gas distributions. The correlation between substructure and central galaxy location verifies the hypothesis of Merritt (1985) and Tremaine (1990) that high peculiar velocities are indicative of recent merger events between less-massive systems of galaxies. Dynamical friction should act quickly to pull the central galaxy, the most massive discrete object in a cluster, to the minimum of the potential. The less-massive galaxies retain information about their primordial subclusters for a longer period of time. I use an objective partitioning algorithm to assign cluster galaxies to their host subclumps. When galaxies are allocated in this fashion to their subclusters, 75\% of the significant velocity offsets are eliminated. Only 2 out of the 25 clusters have central galaxies which are not centrally-located when substructure is considered in the analysis.
Transmission Error and Compression Robustness of 2D Chaotic Map Image Encryption Schemes
Michael Gschwandtner,Andreas Uhl,Peter Wild
EURASIP Journal on Information Security , 2007, DOI: 10.1155/2007/48179
Abstract: This paper analyzes the robustness properties of 2D chaotic map image encryption schemes. We investigate the behavior of such block ciphers under different channel error types and find the transmission error robustness to be highly dependent on on the type of error occurring and to be very different as compared to the effects when using traditional block ciphers like AES. Additionally, chaotic-mixing-based encryption schemes are shown to be robust to lossy compression as long as the security requirements are not too high. This property facilitates the application of these ciphers in scenarios where lossy compression is applied to encrypted material, which is impossible in case traditional ciphers should be employed. If high security is required chaotic mixing loses its robustness to transmission errors and compression, still the lower computational demand may be an argument in favor of chaotic mixing as compared to traditional ciphers when visual data is to be encrypted.
Transmission Error and Compression Robustness of 2D Chaotic Map Image Encryption Schemes
Gschwandtner Michael,Uhl Andreas,Wild Peter
EURASIP Journal on Information Security , 2007,
Abstract: This paper analyzes the robustness properties of 2D chaotic map image encryption schemes. We investigate the behavior of such block ciphers under different channel error types and find the transmission error robustness to be highly dependent on on the type of error occurring and to be very different as compared to the effects when using traditional block ciphers like AES. Additionally, chaotic-mixing-based encryption schemes are shown to be robust to lossy compression as long as the security requirements are not too high. This property facilitates the application of these ciphers in scenarios where lossy compression is applied to encrypted material, which is impossible in case traditional ciphers should be employed. If high security is required chaotic mixing loses its robustness to transmission errors and compression, still the lower computational demand may be an argument in favor of chaotic mixing as compared to traditional ciphers when visual data is to be encrypted.
Simulating a Guitar with a Conventional Sonometer  [PDF]
Zily Burstein, Christina M. Gower, Gabriele U. Varieschi
Open Journal of Acoustics (OJA) , 2012, DOI: 10.4236/oja.2012.22007
Abstract: In this paper we present a simple way to convert a conventional sonometer into a simulated fretted instrument, such as a guitar or similar, by adding a fingerboard to the sonometer. In particular, we use this modified apparatus in relation to the problem of the instrument intonation, i.e., how to obtain correctly tuned notes on these string instruments. The experimental procedures presented in this study can become a more structured laboratory activity to be used in general physics courses or acoustics classes.
Recurrent ameloblastoma of the mandible: Surgical seeding or metastasis of malignant ameloblastoma?  [PDF]
Christina Klee, Sven Lindskog, Jan-M. Hirsch, Andreas Thor
Case Reports in Clinical Medicine (CRCM) , 2013, DOI: 10.4236/crcm.2013.22042
Abstract:

The controversy of surgical seeding or metastasis of a recurrent ameloblastoma is discussed in this paper, where we present a case with a history of 28 years since primary diagnosis including several tumor removals and reconstructive events. 23 years after primary diagnosis, we removed a metastasis from the neck with similar histological features as the primary tumor and the following recurrences of the mandible. We argue that the removed tumor in the neck most possibly has its origin in surgical seeding of cells during earlier resection and reconstruction and not by common ways of metastasis. The seeding of tumor cells during tumor surgery and metastasis rate of malignant ameloblastoma is discussed and the literature in this area is reviewed in the paper.

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