Art as a self-healing process

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Solving the Cold-Start Problem in Recommender Systems with Social Tags

In this paper, based on the user-tag-object tripartite graphs, we propose a recommendation algorithm, which considers social tags as an important role for information retrieval. Besides its low cost of computational time, the experiment results of two real-world data sets, \emph{Del.icio.us} and \emph{MovieLens}, show it can enhance the algorithmic accuracy and diversity. Especially, it can obtain more personalized recommendation results when users have diverse topics of tags. In addition, the numerical results on the dependence of algorithmic accuracy indicates that the proposed algorithm is particularly effective for small degree objects, which reminds us of the well-known \emph{cold-start} problem in recommender systems. Further empirical study shows that the proposed algorithm can significantly solve this problem in social tagging systems with heterogeneous object degree distributions

Cross-Cultural Currents in the Work of Yu-Cheng Chuang: An Examination of the Chinese Principle of Jingjie and Western Idea of the Picturesque as Parallel Influences on Site-Specificity in Land Art

This combined studio practice/text thesis analyses links among the Chinese concept of jingjie, the archetypal patterns of sacred places, the picturesque movement in European aesthetics, and site-specificity in 1960s Land Art. In addition to examining site-specificity and the theoretical aspects of my studio practice, I explore the relationship between my ethnicity and my work in the context of contemporary Chinese and Taiwanese art environments. Guided by the principle that "practice and theory inform each other," I restate the significance of jingjie in contemporary art, especially its connection with the physical and psychological patterns found in archetypal "sacred places." Jingjie was fundamental to the spatial fluidity found in Chinese landscape arts, especially garden design. After demonstrating how Chinese gardens influenced English landscape garden principles and the 18th-century European picturesque movement, I argue that similar East-West connections served as direct and indirect influences on the site-specific work of middle and late 20th-century Land Art artists. I then describe how picturesque depictions of the relationship between man and nature influenced 19th-century landscape architecture in North America and 20th-century Land Art throughout the West. Finally, jingjie and Chinese gardens are used to explore archetypal sacred place patterns and their influences on the Western tradition of the picturesque. These parallel East-West connections served as the foundation for later interest in site-specificity, and were essential in establishing a historical context for understanding cross-cultural currents and their influences on Land Art artists. Using jingjie as my focus, I examine aspects of contemporary art that are not usually addressed by art critics, and reconsider the relevance of the Western picturesque tradition through a reciprocal model of cultural influences

DIVE in the cosmic web: voids with Delaunay Triangulation from discrete matter tracer distributions

We present a novel parameter-free cosmological void finder (\textsc{dive}, Delaunay TrIangulation Void findEr) based on Delaunay Triangulation (DT), which efficiently computes the empty spheres constrained by a discrete set of tracers. We define the spheres as DT voids, and describe their properties, including an universal density profile together with an intrinsic scatter. We apply this technique on 100 halo catalogues with volumes of 2.5\,$h^{-1}$Gpc side each, with a bias and number density similar to the BOSS CMASS Luminous Red Galaxies, performed with the \textsc{patchy} code. Our results show that there are two main species of DT voids, which can be characterised by the radius: they have different responses to halo redshift space distortions, to number density of tracers, and reside in different dark matter environments. Based on dynamical arguments using the tidal field tensor, we demonstrate that large DT voids are hosted in expanding regions, whereas the haloes used to construct them reside in collapsing ones. Our approach is therefore able to efficiently determine the troughs of the density field from galaxy surveys, and can be used to study their clustering. We further study the power spectra of DT voids, and find that the bias of the two populations are different, demonstrating that the small DT voids are essentially tracers of groups of haloes.Comment: 12 pages, 13 figure

Enhancement of Spectral Response in μ

The hydrogenated amorphous silicon (a-Si:H)/hydrogenated microcrystalline silicon (μc-Si:H) double p-type window layer has been developed and applied for improving microcrystalline silicon-germanium p-i-n single-junction thin-film solar cells deposited on textured SnO2:F-coated glass substrates. The substrates of SnO2:F, SnO2:F/μc-Si:H(p), and SnO2:F/a-Si:H(p) were exposed to H2 plasma to investigate the property change. Our results showed that capping a thin layer of a-Si:H(p) on SnO2:F can minimize the Sn reduction during the deposition process which had H2-containing plasma. Optical measurement has also revealed that a-Si:H(p) capped SnO2:F glass had a higher optical transmittance. When the 20 nm μc-Si:H(p) layer was replaced by a 3 nm a-Si:H(p)/17 nm μc-Si:H(p) double window layer in the cell, the conversion efficiency (η) and the short-circuit current density (JSC) were increased by 16.6% and 16.4%, respectively. Compared to the standard cell with the 20 nm μc-Si:H(p) window layer, an improved conversion efficiency of 6.19% can be obtained for the cell having a-Si:H(p)/μc-Si:H(p) window layer, with VOC = 490 mV, JSC = 19.50 mA/cm2, and FF = 64.83%