A new approach for implementing the HLL approximate riemann solver for one-dimensional dam-break flows

Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732Several new techniques are proposed to overcome the deficiencies in the conventional formulation of the approximate Riemann solvers for one-dimensional dam-break flows, which include numerical imbalance and failure to satisfy mass conservation. The former arises in the case of irregular geometry and the latter in the presence of a hydraulic jump. These new techniques include: (1) adopting the form of the Saint Venant equations which include only one source term representing driving forces; (2) using water surface level as one of the primitive variables, in stead of crosssectional area; (3) defining discharge at interface and evaluating it according to the flux obtained by the HLL Riemann solver (Harten et al 1983). The performance of the resulting schemes is evaluated by means of theoretical analysis and various test examples, including ideal dam-break flows with dry bed, hydraulic jump, steady flow over bump with hydraulic jump, and a real-life dam-break flow in natural river valley with complex geometry. It is demonstrated that the scheme has excellent numerical balance and mass conservation property and is capable of satisfactorily reproducing various complicated open channel flows

Gao Brothers' Execution of Christ: visual lexicon transcending culture, time, and place

Title from PDF of title page, viewed on May 27, 2011Thesis advisor: Maude WahlmanVitaIncludes bibliographical references (p. 86-91)Thesis (M.A.)--Dept. of Art History. University of Missouri--Kansas City, 2011After the death of Chairman Mao Zedong in 1979, China began a national transformation from a once self-imposed isolated culture to one that hoped to be economically and culturally engaged with the rest of the world. Chinese artists were exposed overwhelmingly to Western contemporary arts and philosophies. With both exposure to new Western artistic concepts and a desire to diverge from traditional Chinese art, which was seen as outdated form of art, Chinese artists wanted to modernize the Chinese arts by creating new visual lexicons and artistic languages. This thesis will discuss how The Gao Brothers were able to apply Western artistic concepts to integrate the Chinese culture and create a unique artistic language while remaining separate from the Western contemporary arts and traditional Chinese arts. The discussion will examine major influences and inspirations that led to the creation of the Gao Brothers' 2009 sculpture, The Execution of Christ, including the artists' family history, occurrences of major historical events, challenges in creating a new identity for a nation, and artistic responses to international influences. Works of the Gao Brothers will be compared and contrasted with other Chinese contemporaries and with Western and Eastern art concepts, philosophies, and techniques. These insights into the Gao Brothers' artistic development process were obtained through criticisms, catalogues, and other published materials, in addition to the author's in-person interviews with The Gao Brothers, their curator, Author Hwang, and the artists' personal art dealer and friend, Melanie Lum. The Gao Brothers are continually evolving the artistic language of their art to reflect changing world. They strive to push cultural and social boundaries to express their feelings of their cultural past as well as hope for the future. The artists are successful in creating avant-garde art by borrowing Western art philosophies and redefining conventional iconographic interpretations within their works, specifically in The Execution of Christ. The combined and redefined uses of art iconography, religious and cultural philosophies in The Execution of Christ, resulted in an artistic language that communicates to all humanity that transcends culture, time, and place.College of Arts and SciencesThe cultural context of Chinese art -- The critical context of understanding The Execution of Christ -- Gao Zhen and Gao Qiang -- The Execution of Christ -- Composition and formal interpretation -- Catharsis and reminder of the human condition -- The Gao brothers and the neo-traditionalists -- Conclusion -- Appendix A. Interview notes and transcripts -- Appendix B. KCUR 89.3 interview transcripts -- Appendix C. Kemper art webcast, part 1 -- Kemper art webcast, part 2 -- PRI, the World: interview transcript -- Appendix G. Melanie Lum interview notesmonographi

Drinfeld twist and symmetric Bethe vectors of the open XYZ chain with non-diagonal boundary terms

With the help of the Drinfeld twist or factorizing F-matrix for the eight-vertex solid-on-solid (SOS) model, we find that in the F-basis provided by the twist the two sets of pseudo-particle creation operators simultaneously take completely symmetric and polarization free form. This allows us to obtain the explicit and completely symmetric expressions of the two sets of Bethe states of the model.Comment: Latex file, 25 page

Identifying the Independent Inertial Parameter Space of Robot Manipulators

This paper presents a new approach to the problem of finding the minimum number of inertial parameters of robot manipulator dynamic equations of motion. Based upon the energy difference equation, it is equally applica ble to serial link manipulators as well as graph structured manipulators. The method is conceptually simple, compu tationally efficient, and easy to implement. In particular, the manipulator kinematics and the joint positions and velocities are the only inputs to the algorithm. Applica tions to a serial link and a graph structured manipulator are illustrated.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67982/2/10.1177_027836499101000606.pd

Measurement of K^+K^- production in two-photon collisions in the resonant-mass region

K^+K^- production in two-photon collisions has been studied using a large data sample of 67 fb^{-1} accumulated with the Belle detector at the KEKB asymmetric e^+e^- collider. We have measured the cross section for the process gamma gamma -> K^+ K^- for center-of-mass energies between 1.4 and 2.4 GeV, and found three new resonant structures in the energy region between 1.6 and 2.4 GeV. The angular differential cross sections have also been measured.Comment: 24 pages, 8 figures, to appear in Euro. Phys. Jour.

Measurement of the gamma gamma -> pi+ pi- and gamma gamma -> K+ K- processes at energies of 2.4 - 4.1 GeV

We have measured pi+pi- and K+K- production in two-photon collisions using 87.7 /fb of data collected with the Belle detector at the asymmetric energy e+e- collider KEKB. The cross sections are measured to high precision in the two-photon center-of-mass energy (W) range between 2.4 GeV < W < 4.1 GeV and angular region |cos theta^{*}| < 0.6. The cross section ratio sigma(gammagamma->K+K-)/sigma(gammagamma->pi+pi-) is measured to be 0.89 +- 0.04(stat) +- 0.15(syst) in the range of 3.0 GeV < W < 4.1 GeV, where the ratio is energy independent. We observe a sin^{-4} theta^{*} behavior of the cross section in the same W range. Production of chi_{c0} and chi_{c2} mesons is observed in both gammagamma -> pi+pi- and gammagamma -> K+K- modes.Comment: 17 pages, 5 figures, submitted to Phys. Lett. B, errors relative to the two-photon decay width correcte

Spectra of prompt electrons from decays of B+ and B0 mesons and ratio of inclusive semielectronic branching fractions

We present spectra of prompt electrons from decays of neutral and charged B mesons. The results are based on 140 /fb of data collected by the Belle detector on the Upsilon(4S) resonance at the KEKB e+e- asymmetric collider. We tag Upsilon(4S) -> B \bar{B} events by reconstructing a B meson in one of several hadronic decay modes; the semileptonic decay of the other B meson is inferred from the presence of an identified electron. We obtain for charged and neutral B mesons the partial rates of semileptonic decay, to electrons with momentum greater than 0.6 GeV/c in the B rest frame, and their ratio b_+/b_0 = 1.08 +- 0.05 +- 0.02, where the first and second errors are statistical and systematic, respectively.Comment: 16 pages, 2 figure files, submitted to Phys. Lett.

Observation of B+ -> K+ eta gamma

We report measurements of radiative B decays with K eta gamma final states, using a data sample of 253 /fb recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- storage ring. We observe B+ -> K+ eta gamma for the first time with a branching fraction of (8.4 +- 1.5(stat) +1.2 -0.9(syst)) X 10^{-6} for M(Keta) K0 eta gamma. We also search for B -> K3*(1780) gamma.Comment: 12 pages, 5 figures, accepted by Phys. Lett.

The role of self-gentrification in sustainable tourism: Indigenous entrepreneurship at Honghe Hani Rice Terraces World Heritage Site, China

This article examines three forms of tourism gentrification occurring within the newly inscribed (2013) Honghe Hani Rice Terraces UNESCO World Heritage Site in Yunnan, China. The indigenous Hani and Yi communities who populate this remote mountainous area, possess distinct cultural practices that have supported the rice terrace ecosystem for centuries. This article draws on interviews and non-participant observation conducted with inhabitants and newcomers to analyse the types of gentrification occurring within the site. We argue that indigenous cultural practices, and consequently rice cultivation in the area, are threatened by gentrifier-led and state-led gentrification combined with high levels of outward migration of indigenous persons. This could pose a significant threat to the sustainability of tourism at this site and may ultimately compromise the site’s World Heritage Status. In the midst of these dangers, some indigenous people are shown to be improving their socioeconomic standing – and becoming “middle class” or “gentry” – particularly through adopting entrepreneurial strategies gleaned from their encounters with outside-gentrifiers and tourists. This article proposes the concept of “self-gentrification” as a way to describe individuals who seek to improve themselves and their own community, while under threat of gentrification