1,725,854 research outputs found
Xi Wang Mu with bird
No full textThis is the earliest representation of the Queen Mother of the West, Xi Wang Mu, referred by the Zhuangzi (a philosophical text), as an exemplary being who had achieved the dao. She was living in the Shaoguang Mountain; no one had knowledge of her beginning or her end. She wears a flower and a sheng crown on her hair, which is often shaped on a transverse rod with discs at its ends, as clearly shown here. She also wears a stylized long-sleeved garment and a flapping sash. This motif is one of the principal ways of identifying the deity. Birds such as peacocks and cranes are always associated with the image of Xi Wang Mu. She is flanked by a tall, upright, compacted-body bird that bears resemblance to a crane. It has very straight legs and a long curved beak, is represented standing next to the deity, and is braced against her long, right sleeve. The crane confers immortality and may indeed have an escorting function. The figure of Xi Wang Mu is carried out in low relief with clear instance under the swept-over waist sash. She also carries on her right hand a long fly flap or chowry, an ancient Taoist emblem of immortality (sometimes an emblem of royalty or rank, if seen with a different figure), usually made of yak-tails or coir.
The stylized lotus motif for the wooden base can confuse viewers that this is a representation of Guanyin. The above description may help reaffirm that this is indeed a Xi Wang Mu figure.Qing dynasty; Qianlong reig
Self-Adapted Floquet Dynamics of Ultracold Bosons in a Cavity
No full textIncludes supplementary materialFloquet dynamics of a quantum system subject to periodic modulations of system parameters provides a powerful tool for engineering new quantum matter with exotic properties. While system dynamics is significantly altered, the periodic modulation itself is usually induced externally and independent of Floquet dynamics. Here we propose a new type of Floquet physics for a Bose-Einstein condensate (BEC) subject to a shaken lattice generated inside a cavity, where the shaken lattice and atomic Floquet bands are mutually dependent, resulting in self-adapted Floquet dynamics. In particular, the shaken lattice induces Floquet quasienergy bands for the BEC, whose backaction leads to a self-adapted dynamical normal-superradiant phase transition for the shaken lattice. Such self-adapted Floquet dynamics shows two surprising and unique features: (i) The normal-superradiant phase transition possesses a hysteresis even without atom interactions. (ii) The dynamical atom-cavity steady state could exist at free energy maxima. The atom interactions strongly affect the phase transition of the BEC from zero to finite momenta. Our results provide a powerful platform for exploring self-adapted Floquet physics, which may open an avenue for engineering novel quantum materials. © 2018 American Physical Society.This work is supported by AFOSR (Grant No. FA9550-16-1-0387), the National Science Foundation (Grant No. PHY-1505496), and ARO (Grant No. W911NF-17-1-0128).School of Natural Sciences and Mathematic
Queen Mother of the West or Xi Wang Mu
No full textThis refined dancing figure of Xi Wang Mu has on her hair a flower and a sheng crown, which is often shaped on a transverse rod with discs at its ends, as clearly shown here. She also wears an excessively long sleeved garment and an elegant flapping sash. The hem of her close-fitting garment spreads out around her feet. Her right hand carries a basket of flowers (Hua-Lan); her left hand carries a curvy stem of lotus flower (Lien Hua) raised to the height of her to form an arc. These motifs are among the eight emblems of the Taoist Immortals and are principal ways of identifying the deity.
Base on the three-dimensional carving style that suggests a realistic form, the figurine belongs to the Qianlong period.
Although this carving is listed by the dealer (B. Altman Co. in 1940) as Guanyin, it is indeed a representation of the Queen Mother of the West or Xi Wang Mu (Guanyin figures have never been portrayed in a dancing posture; nor does she pose in profile). The image of the Bodhisattva usually has a small Amitabha Buddha in her headdress symbolizing that she, like her original male predecessor, is regarded as a manifestation of Amitabha Buddha.)Qing dynasty; Qianlong reig
Spin-Tensor–Momentum-Coupled Bose-Einstein Condensates
No full textIncludes supplementary materialThe recent experimental realization of spin-orbit coupling for ultracold atomic gases provides a powerful platform for exploring many interesting quantum phenomena. In these studies, spin represents the spin vector (spin 1/2 or spin 1) and orbit represents the linear momentum. Here we propose a scheme to realize a new type of spin-tensor-momentum coupling (STMC) in spin-1 ultracold atomic gases. We study the ground state properties of interacting Bose-Einstein condensates with STMC and find interesting new types of stripe superfluid phases and multicritical points for phase transitions. Furthermore, STMC makes it possible to study quantum states with dynamical stripe orders that display density modulation with a long tunable period and high visibility, paving the way for the direct experimental observation of a new dynamical supersolidlike state. Our scheme for generating STMC can be generalized to other systems and may open the door for exploring novel quantum physics and device applications.Air Force Office of Scientific Research (FA9550-16-1-0387), National Science Foundation (PHY-1505496), and Army Research Office (W911NF- 17-1-0128).School of Natural Sciences and Mathematic
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
