An Approach to Higher Dimensional Theories Based on Lattice Gauge Theory

A higher dimensional lattice space can be decomposed into a number of four-dimensional lattices called as layers. The higher dimensional gauge theory on the lattice can be interpreted as four-dimensional gauge theories on the multi-layer with interactions between neighboring layers. We propose the new possibility to realize the continuum limit of a five-dimensional theory based on the property of the phase diagram.Comment: Lattice2003(higgs

A Survey on the Current Situation of High-Quality Development of Employment and Entrepreneurship Services in Hebei Universities under the Background of Digital Intelligence

Digital intelligence technology is an important engine for economic and social development. Digital intelligence has brought new opportunities for employment and entrepreneurship services in Hebei universities. This paper first defines the connotation of high-quality development of employment and entrepreneurship services in Hebei universities from four aspects: development philosophy, development mode, development path, and development momentum. Then, through field research and questionnaire surveys, the current situation of employment and entrepreneurship services in Hebei universities is thoroughly investigated, and the advantages and bottlenecks of high-quality development of employment and entrepreneurship services in Hebei universities are analyzed. This survey lays a solid foundation for the follow-up research on the specific realization path of high-quality development of employment and entrepreneurship services in Hebei universities under the background of digital intelligence

Variational Monte-Carlo studies of Gossamer Superconductivity

We use a partially Gutzwiller projected BCS d-wave wavefunction with an antiferromagentic weighting factor to study the ground state phase diagram of a half filled Hubbard-Heisenberg model in a square lattice with nearest neighbor hopping $t$ and a diagonal hopping $t'$. The calculations are carried out by using variational Monte Carlo method which treats the Gutzwiller projection explicitly. At large on-site Coulomb interaction $U$, the ground state is antiferromagnetic. As $U$ decreases, the ground state becomes superconducting and eventually metallic. The phase diagram is obtained by extensive calculations. As compared to the strong effect of $U/t$, the phase boundaries turn out to be less sensitive to $t'/t$. The result is consistent with the phase diagram in layered organic conductors, and is compared to the earlier mean field result based on the Gutzwiller approximation.Comment: 5 pages, 4 figure

A REEXAMINATION OF CURRENT HOTEL VALUATION TECHNIQUES – WHICH APPROACH IS MORE REALISTIC?

This study revisits the issue of accuracy in contemporary hotel valuation. Along with the hotel valuation techniques used by Rushmore (1992) and Chen and Kim (2010), this study uses the cost approach and the automated valuation model (AVM) in its examination of contemporary hotel valuation techniques. Fourteen randomly selected hotel firms are analyzed using nine valuation approaches. The valuation results are then compared to the market values of these firms to assess which technique provides the most robust and supportable estimate.Research results reveal that, at least for the analyzedsample, thediscounted cash flow(DCF) technique provides themost realistic estimate of a hotel firm’s value. Results also show that the valuation estimate of AVM is significantly different from both Band of Investment methods. As such, the process of valuing hotel properties is better understood

Visualizing topological edge states of single and double bilayer Bi supported on multibilayer Bi(111) films

Freestanding single-bilayer Bi(111) is a two-dimensional topological insulator with edge states propagating along its perimeter. Given the interlayer coupling experimentally, the topological nature of Bi(111) thin films and the impact of the supporting substrate on the topmost Bi bilayer are still under debate. Here, combined with scanning tunneling microscopy and first-principles calculations, we systematically study the electronic properties of Bi(111) thin films grown on a NbSe2 substrate. Two types of non-magnetic edge structures, i.e., a conventional zigzag edge and a 2x1 reconstructed edge, coexist alternately at the boundaries of single bilayer islands, the topological edge states of which exhibit remarkably different energy and spatial distributions. Prominent edge states are persistently visualized at the edges of both single and double bilayer Bi islands, regardless of the underlying thickness of Bi(111) thin films. We provide an explanation for the topological origin of the observed edge states that is verified with first-principles calculations. Our paper clarifies the long-standing controversy regarding the topology of Bi(111) thin films and reveals the tunability of topological edge states via edge modifications.Comment: 36 pages, 10 figure

Characterizing Power and Energy Efficiency of Legion Data-Centric Runtime and Applications on Heterogeneous High-Performance Computing Systems

The traditional parallel programming models require programmers to explicitly specify parallelism and data movement of the underlying parallel mechanisms. Different from the traditional computation-centric programming, Legion provides a data-centric programming model for extracting parallelism and data movement. In this chapter, we aim to characterize the power and energy consumption of running HPC applications on Legion. We run benchmark applications on compute nodes equipped with both CPU and GPU, and measure the execution time, power consumption and CPU/GPU utilization. Additionally, we test the message passing interface (MPI) version of these applications and compare the performance and power consumption of high-performance computing (HPC) applications using the computation-centric and data-centric programming models. Experimental results indicate Legion applications outperforms MPI applications on both performance and energy efficiency, i.e., Legion applications can be 9.17 times as fast as MPI applications and use only 9.2% energy. Legion effectively explores the heterogeneous architecture and runs applications tasks on GPU. As far as we know, this is the first study to understand the power and energy consumption of Legion programming and runtime infrastructure. Our findings will enable HPC system designers and operators to develop and tune the performance of data-centric HPC applications with constraints on power and energy consumption

The influences of cognition of institutional logics and triple helix relations on innovation performance: An empirical study of firms in industrial park in Taiwan

Abstract. The present study set out to investigate into the influences of cognition of institutional logics and triple helix relationships (i.e., the industry-university-government linkages) on firm innovation performance in the context of Taiwan industrial parks. The data from 131 organizational-level questionnaires collected from firms located in different industrial parks were analyzed. The results showed that cognition of institutional logics is positively associated with firms’ innovation performance. Furthermore, such positive relationship is strengthened by the number of triple helix relationships in the form of mediation but not moderation effect. Theoretical and practical implications were elaborated. Keywords. Cognition of institutional logics, Triple helix, Innovation performance, Industrial park.JEL. M10, M14