Vector mesons in qqˉqˉq\bar q\bar q systems

A new selection rule is described for the vector mesons in the decuplet representations of flavor SU(3)Comment: 7 pages and 1 figur

Evaluation of the Self on the Big Two and their Facets: Exploring the Model and its Nomological Network

Social evaluation of the self, of others, and of groups rests on two dimensions, also called ‘the Big Two' (Horizontal: Communion, Warmth; Vertical: Agency, Competence). These Big Two have recently been broken down into two facets each. The Vertical dimension comprises Ability and Assertiveness, the Horizontal dimension Friendliness and Morality (Abele et al., 2008, 2016, 2021). In three studies, the present paper further explores this dimensions/facets conceptualization. We ask if the facets add explanatory power over and above the dimensions; and we analyze a number of criterion variables not considered before. Participants always had to rate themselves on the dimensions/facets and answered additional measures. These were social desirable responding and item valence. These are interesting from a methodological point of view. Self-efficacy and dominance orientation (vertical facets) and social value orientation (horizontal facets) were of interest with respect to the distinction of the facets. Finally, life satisfaction and self-awareness were analyzed as more remote constructs. Findings supported the dimension/facets model; they supported the construct validity of the Big Two; they supported the construct validity of the facets; and they revealed instances, under which distinguishing between the facets is promising. Further research perspectives regarding targets of evaluation and regarding construct validity particularly of the Horizontal facets are outlined. We summarize that the facet conceptualization is an important extension of the prominent Big Two approach

Ramsey's Method of Separated Oscillating Fields and its Application to Gravitationally Induced Quantum Phaseshifts

We propose to apply Ramsey's method of separated oscillating fields to the spectroscopy of the quantum states in the gravity potential above a vertical mirror. This method allows a precise measurement of quantum mechanical phaseshifts of a Schr\"odinger wave packet bouncing off a hard surface in the gravitational field of the earth. Measurements with ultra-cold neutrons will offer a sensitivity to Newton's law or hypothetical short-ranged interactions, which is about 21 orders of magnitude below the energy scale of electromagnetism.Comment: 7 pages, 6 figure

Micro Laser Melting: Analyses of Current Potentials and Restrictions for the Additive Manufacturing of Micro Structures

Although there is a significant requirement for complex micro parts, current metal processing additive manufacturing techniques are limited in achievable part accuracy and geometric resolution. Due to the recently developed process of Micro Laser Melting (MLM) new potentials in micro manufacturing are realizable. This paper gives an overview of the present potentials of MLM using 316L steel powder. While using powder material with a grain size of ≤ 5 µm this technique enables layer thicknesses from 5 to 7 µm. Due to the use of different exposure strategies and laser modes (pulsed and continuous radiation) high aspect ratios up to 260 could be realized with thin wall structures. Furthermore, the influence of laser mode and exposure sequence on the part density, surface quality and accuracy of lattice structures with a minimum wall thickness lower than 40 µm is analyzed.Mechanical Engineerin

Light Hadron Spectroscopy: Theory and Experiment

Rapporteur talk at the Lepton-Photon Conference, Rome, July 2001: reviewing the evidence and strategies for understanding scalar mesons, glueballs and hybrids, the gluonic Pomeron and the interplay of heavy flavours and light hadron dynamics. Dedicated to the memory of Nathan Isgur, long-time collaborator and friend, whose original ideas in hadron spectroscopy formed the basis for much of the talk.Comment: to be published in "Lepton Photon 2001 Conference Proceedings" (World Scientific Publishing), 19 pages with 6 figure

Communication and Surveillance for Ground Transportation

For high speed intercity or low speed intracity operation, communications and surveillance are important aspects in the design of control systems for advanced ground transportation. New technological approaches in communications and surveillance can provide improvements in system capacity, operational economy, safety and passenger convenience. A dielectric waveguide for communications and surveillance of vehicle characteristics (position and velocity) has been under experimental and analytical investigation for use along fixed guideways for ground transportation. This communication concept is nonradiating, has a broad bandwidth and provides a high rate of information transfer. Another important aspect of guideway surveillance is the detection of foreign obstacles that may cause vehicle damage or compromise passenger safety. For this application, an optical concept using a set of laser beams along the wayside is under investigation. The operating characteristics and method of deployment along TACV and railway guideways are presented

Selective Laser Melting of Porous Structures

Within the Center of Smart Interfaces “Understanding and Designing Fluid Boundaries”, a German Excellence Initiative, the Institute of Production Management, Technology and Machine Tools examines the manufacturing of porous structures by using selective laser melting (SLM). In this paper two different strategies are presented in order to obtain porosity: One strategy is to manufacture geometrically defined lattice structures. SLM allows here complex geometries that cannot be manufactured by conventional technologies to be built. The second approach is to manufacture geometrically undefined porosity by a specific modification of exposure parameters. The SLM generated porous structures are investigated with respect to the heat and mass transfer. The research focus is to increase the efficiency of spraycooling effects and the manipulation of the Leidenfrost point.Mechanical Engineerin

Molecular Evidence for Inclusion on the Phylum Pentastomida in the Crustacea

The phylogenetic status of the phylum Pentastomida (tongue worms) was considered on the basis of comparison of nucleotide sequences of 18S ribosomal RNA from the pentastome Porocephalus crotali, the branchiuran crustacean fish louse Argulus nobilis, other crustaceans, and representatives of the Annelida, Chelicerata, Myriapoda, and Insecta. Maximum parsimony and invariants (at P \u3c 0.04) analyses support an Argulus/Porocephalus clade, providing strong support for the proposal that tongue worms are highly modified crustaceans closely related to fish lice