Screening Masses in Dimensionally Reduced (2+1)D Gauge Theory

We discuss the screening masses and residue factorisation of the SU(3) (2+1)D theory in the dimensional reduction formalism. The phase structure of the reduced model is also investigated.Comment: 3 pages, Lattice 2001(gaugetheories

Screening in (2+1)D pure gauge theory at high temperatures

We compute heavy quark potentials in pure gauge $SU(3)$ at high temperatures in $2+1$ dimensions and confront them with expectations emerging from perturbative calculations.Comment: 3 pages, latex, 4 figures, uu, Contribution to LATTICE 9

The string tension in SU(N) gauge theory from a careful analysis of smearing parameters

We report a method to select optimal smearing parameters before production runs and discuss the advantages of this selection for the determination of the string tension.Comment: Contribution to Lat97 poster session, title was 'How to measure the string tension', 3 pages, 5 colour eps figure

A Study of Finite Temperature Gauge Theory in (2+1) Dimensions

We determine the critical couplings and the critical exponents of the finite temperature transition in SU(2) and SU(3) pure gauge theory in (2+1) dimensions. We also measure Wilson loops at $T=0$ on a wide range of $\beta$ values using APE smearing to improve the signal. We extract the string tension $\sigma$ from a fit to large distances, including a string fluctuation term. With these two entities we calculate $T_c/\sqrt{\sigma}$.Comment: Talk presented at LATTICE96(finite temperature), not espcrc2 style: 7 pages, 4 ps figures, 22 k

Accurate Scale Determinations for the Wilson Gauge Action

Accurate determinations of the physical scale of a lattice action are required to check scaling and take the continuum limit. We present a high statistics study of the static potential for the SU(3) Wilson gauge action on coarse lattices ($5.54 \leq \beta \leq 6.0$). Using an improved analysis procedure we determine the string tension and the Sommer scale $r_0$ (and related quantities) to 1% accuracy, including all systematic errors. Combining our results with earlier ones on finer lattices, we present parameterizations of these quantities that should be accurate to about 1% for $5.6 \leq \beta \leq 6.5$. We estimate the \La-parameter of quenched QCD to be \La_\MSb = 247(16) MeV.Comment: 18 pages, LaTeX, 5 ps files (corrected typo in table 5, updated references

High Temperature 3D QCD: Dimensional Reduction at Work

We investigate the three-dimensional SU(3) gauge theory at finite temperature in the framework of dimensional reduction. The large scale properties of this theory are expected to be conceptually more complicated than in four dimensions. The dimensionally reduced action is computed in closed analytical form. The resulting effective two-dimensional theory is studied numerically both in the electric and magnetic sector. We find that dimensional reduction works excellently down to temperatures of 1.5 times the deconfinement phase transition temperature and even on rather short length scales. We obtain strong evidence that for ${\rm QCD}_3$, even at high temperature the colour averaged potential is represented by the exchange of a single state, at variance with the usual Debye screening picture involving a pair of electric gluons.Comment: 27 page

Screening masses in quenched (2+1)d Yang-Mills theory: universality from dynamics?

We compute the spectrum of gluonic screening-masses in the $0^{++}$ channel of quenched 3d Yang-Mills theory near the phase-transition. Our finite-temperature lattice simulations are performed at scaling region, using state-of-art techniques for thermalization and spectroscopy, which allows for thorough data extrapolations to thermodynamic limit. Ratios among mass-excitations with the same quantum numbers on the gauge theory, 2d Ising and $\lambda\phi^{4}$ models are compared, resulting in a nice agreement with predictions from universality. In addition, a gauge-to-scalar mapping, previously employed to fit QCD Green's functions at deep IR, is verified to dynamically describe these universal spectroscopic patternsComment: 15 pages, 4 eps figures. Revised version, to appear in Nucl. Phys.

Parking Garages as Spaces of Opportunity - An Analysis of Overlooked Nodes as Potential Spaces for Adaptive Reuse

Parking garages belong to the basic inventory of today’s cities, however their existence and contribution to the urban fabric is marginally discussed under the urban themes of structural transformation, environmental underperformance and socio-cultural fragmentation. This thesis is a study of parking infrastructure in the inner-city of Malmö with a particular focus on rooftops as spaces of opportunities for a sustainable urban development. The thesis aims to investigate whether an integration of parking garages into the urban fabric of their local environment can contribute to a more equal, mixed-use city development through adaptive reuse of the rooftops as public green spaces. Based on a literature review on public space transformation, urban green spaces, its threats and services and an investigation of a specific case study, this thesis identifies parking garages as potential spaces to compensate a lack of urban green and public environment. The study of possible integration of public and green services into the existing structures of parking garages is performed on the level of a city wide analysis, as well as in a particular context of a central district in Malmö. The study shows that the location of parking garages within network nodes of an increasingly mobile society and fragmented city structure could be strategic locations for additional uses. Furthermore an evaluation of parking garage usage has confirmed, that stand-alone, open-roof structures have been affected by vacancy, specifically in the upper floors due to decrease of demand for car parking in the central parts of Malmö. Finally this study concludes that parking garages are overlooked nodes with further potentials for adaptive reuse

Word order asymmetries in NGT coordination: The impact of Information Structure

Research on spoken languages shows that the structure of coordination is typically determined by the parallel architecture of the conjuncts involved, a constraint that we refer to as the “Parallel Structure Constraint” (PSC). Apart from syntactic parallelism, the PSC requires that the conjuncts exhibit the same information structure (IS). We address the structure of coordination and the working of the PSC in Sign Language of the Netherlands (NGT), using corpus data. Data extracted from the Corpus NGT reveal that the PSC may be violated in this language in that the order of predicate and argument may vary across conjuncts. We claim that this asymmetry results from IS-related syntactic movement, in particular, fronting of a contrastively focused constituent in the second conjunct. It appears that in NGT, movement is at times preferred over prosodic marking in situ, as it is a more salient foregrounding strategy in such complex (bi-clausal) constructions