327 research outputs found
Structure of theΛ(1405)and theK−d→πΣnreaction
No full textThe resonance production reaction is investigated within the
framework of the coupled-channels Alt-Grassberger-Sandhas (AGS) equations. We
perform full three-body calculations for the \barKNN-\pi YN amplitudes on
the physical real energy axis and investigate how the signature of the
appears in the cross sections of the reactions, also in view of the planned E31 experiment at J-PARC. Two types
of meson-baryon interaction models are considered: an energy-dependent
interaction based on chiral effective field theory, and an
energy-independent version that has been used repeatedly in phenomenological
approaches. These two models have different off-shell properties that imply
correspondingly different behavior in the three-body system. We investigate how
these features show up in differential cross sections of reactions. Characteristic patterns distinguishing between the two
models are found in the invariant mass spectrum of the final state.
The reaction, with different
( and ) charge combinations in the
final state, is thus demonstrated to be a useful tool for investigating the
subthreshold behavior of the \barKN interaction
Improved constraints on chiral SU(3) dynamics from kaonic hydrogen
No full textAbstractA new improved study of K−–proton interactions near threshold is performed using coupled-channels dynamics based on the next-to-leading order chiral SU(3) meson–baryon effective Lagrangian. Accurate constraints are now provided by new high-precision kaonic hydrogen measurements. Together with threshold branching ratios and scattering data, these constraints permit an updated analysis of the complex K¯N and πΣ coupled-channels amplitudes and an improved determination of the K−p scattering length, including uncertainty estimates
The Femme Fatale and the Exotic Queer within Shinya Tuskamoto\u27s Tetsuo: Gender as Narrative Tool within an Allegory for Post WWII Japan\u27s Industrialized Identity Crisis
No full textWithin Shinya Tsukamoto’s seminal independent horror masterpiece Tetsuo, the viewer’s perceptions of reality and the present are distorted within a temporally disjointed blend of horrific fantasy and banal existence; this instability reflects the vocal and subconscious critiques of historical ontological truths exhibited within the emergent transnational genres of Japanese cyberpunk and American Avant-pop ideologies of the late 1980’s. Author Takayuki Tatsumi uses Shinya Tsukamoto\u27s Tetsuo to illustrate the emergence of the Japanoid, a technologically driven fusion of American and Japanese post-war identity best understood as a manifestation of Donna Haraway\u27s socio-political cyborg. Tatsumi strongly advises avoiding interpretation through a queer lens, proposing that the use of “cyborg” and scrap iron serve as an analogy for the stratification and integration of disenfranchised post WWII Okinawan “scrap apaches.” However, Tetsuo’s prominent homoerotic elements cannot be ignored. Arguably, The film presents as blatantly non-heteronormative; to ignore queerness and instead focus solely on Tatsumi\u27s definition of identity ignores the meaning of masculinity in a patriarchal culture, rendering an incomplete (post)colonial reading. A queer reading clarifies Tsukamoto\u27s take on the contemporary disenfranchisement of the so-called Japanoid identity that Tatsumi embraces. Within Tetsuo, representation of woman as femme fatale and an overt queering of masculinity problematize the traditional heteronormative Japanese identity
Inexpensive Fracture Toughness Testing of Welded Steel
No full textIn a prior project, TNO has presented a low-cost way of finding fracture toughness of base materials for cleavage fracture. That method features a small-scale CTOD specimen, combined with simplified sensors, less fatigue pre-cracking, faster testing, and no need for a temperature chamber. This method has been extended to welds by considering the effect of pop-ins. This paper summarizes the prior method and the justifications for it before extending it to welded structures by introducing adjustments for pop-ins for small-scale specimens.Accepted Author ManuscriptShip Hydromechanics and StructuresBUS/TNO STAF
Slow positron applications at slow positron facility of institute of materials structure science, KEK
No full textHadron mass scaling near the s-wave threshold
No full textThe influence of a two-hadron threshold is studied for the hadron mass scaling with respect to some quantum chromodynamics parameters. A quantum mechanical model is introduced to describe the system with a one-body bare state coupled with a single elastic two-body scattering. The general behavior of the energy of the bound and resonance state near the two-body threshold for a local potential is derived from the expansion of the Jost function around the threshold. It is shown that the same scaling holds for the nonlocal potential induced by the coupling to a bare state. In p or higher partial waves, the scaling law of the stable bound state continues across the threshold describing the real part of the resonance energy. In contrast, the leading contribution of the scaling is forbidden by the nonperturbative dynamics near the s-wave threshold. As a consequence, the bound state energy is not continuously connected to the real part of the resonance energy. This universal behavior originates in the vanishing of the field renormalization constant of the zero-energy resonance in the s wave. A proof is given for the vanishing of the field renormalization constant, together with a detailed discussion
Design Contours for Complex Marine Systems
No full textThis paper examines the performance of 6 stiffened ship panel designs in different operational profiles. The main question of interest is: which sea states will lead to the worst panel performances in terms of reliability? As stiffened panel collapse is governed by combined lateral and in-plane loading effects (non-linear functions of the wave environment) this is not a simple problem and does not easily fit into the confines of traditional analyses. Interesting sea states for stiffened panel collapse are identified by a low-order design contour method which uses order statistics and extreme value theory. The resulting multimodal design contours pinpoint areas of interest and the panel performances are confirmed using a higher-order reliability analysis: the non-linear Design Loads Generator process. Such results have impact for creating and interpreting environmental and design contours, as well as assumptions about which operational profiles will lead to the worst system responses.Accepted Author ManuscriptShip Hydromechanics and StructuresShip Design, Production and Operation
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