We demonstrate the emergence of the quantum Hall (QH) hierarchy in a 2D model of coupled quantum wires in a perpendicular magnetic field. At commensurate values of the magnetic field, the system can develop instabilities to appropriate interwire electron hopping processes that drive the system into a variety of QH states. Some of the QH states are not included in the Haldane-Halperin hierarchy....

We discuss the hierarchy of Yukawa couplings in a supersymmetric three family Standard-like string Model. The model is constructed by compactifying Type IIA string theory on a Z2 ×Z2 orientifold in which the Standard Model matter fields arise from intersecting D6-branes. When lifted to M theory, the model amounts to compactification of M-theory on a G2 manifold. While the actual fermion masses ...

There is continuing research interest in comparison of the complexity of problems within the class NP-Complete. This paper examines the representational power of conjunctive normal form Boolean expressions to establish a proper hierarchy for finite languages, where the language of an expression is defined to be the set of bit strings corresponding to its satisfying assignments. The increasing r...

The effectiveness of the memory hierarchy is critical for the performance of current processors. The performance of the memory hierarchy can be improved by means of program transformations such as padding, which is a code transformation targeted to reduce conflict misses. This paper presents a novel approach to perform near-optimal padding for multi-level caches. It analyzes programs, detecting...

Higher-dimensional field theory has been applied to explore various issues in recent particle physics such as the gauge hierarchy problem. In order for such approaches to be viable, a crucial ingredient is to fix the sizes of extra dimensions at some finite values, which sizes are generically free parameters in the theory. In this paper, we present several schemes to determine the radius of ext...

We present a LOD rendering technique for large, textured terrain, which is well-suited for recent GPUs. In a preprocess, we tile the domain, and we compute for each tile a discrete set of LODs using a nested mesh hierarchy. This hierarchy can be encoded progressively. At run time, continuous LODs can simply be generated by interpolation of per-vertex height values on the GPU. Any mesh re-triang...

We present a method for compact encoding of attributes such as normal vectors defined on a triangle mesh of arbitrary topology suitable in the context of view-dependent simplification. It is based on the recently introduced CAME data structure (Compressed Adaptive Multiresolution Encoding). In accordance with the vertex hierarchy defined by mesh simplification, we define an attribute hierarchy ...

This study explores pitch range variation in Korean spontaneous narratives and read transcripts of the same narratives. There are two research goals. One is to examine whether pitch range variation helps mark discourse segment boundaries and signal the hierarchy of discourse segment purposes. Another is to see whether categorical differences in pitch range encode the contrast between the two in...

We investigate a technique from the literature, called the phantom-types technique, that uses parametric polymorphism, type constraints, and unification of polymorphic types to model a subtyping hierarchy. Hindley-Milner type systems, such as the one found in Standard ML, can be used to enforce the subtyping relation, at least for first-order values. We show that this technique can be used to e...