69,339 research outputs found
Joint Modeling of Topics, Citations, and Topical Authority in Academic Corpora
Much of scientific progress stems from previously published findings, but
searching through the vast sea of scientific publications is difficult. We
often rely on metrics of scholarly authority to find the prominent authors but
these authority indices do not differentiate authority based on research
topics. We present Latent Topical-Authority Indexing (LTAI) for jointly
modeling the topics, citations, and topical authority in a corpus of academic
papers. Compared to previous models, LTAI differs in two main aspects. First,
it explicitly models the generative process of the citations, rather than
treating the citations as given. Second, it models each author's influence on
citations of a paper based on the topics of the cited papers, as well as the
citing papers. We fit LTAI to four academic corpora: CORA, Arxiv Physics, PNAS,
and Citeseer. We compare the performance of LTAI against various baselines,
starting with the latent Dirichlet allocation, to the more advanced models
including author-link topic model and dynamic author citation topic model. The
results show that LTAI achieves improved accuracy over other similar models
when predicting words, citations and authors of publications.Comment: Accepted by Transactions of the Association for Computational
Linguistics (TACL); to appea
Design Research on Robotic Products for School Environments
Advancements in robotic research have led to the design of a number of robotic products that can interact with people. In this research, a school environment was selected for a practical test of robotic products. For this, the robot “Tiro” was built, with the aim of supporting the learning activities of children. The possibility of applying robotic products was then tested through example lessons using Tiro. To do this, the robot design process and user-centred HRI evaluation framework were studied, and observations of robotic products were made via a field study on the basis of these understandings. Three different field studies were conducted, and interactions between children and robotic products were investigated. As a result, it was possible to understand how emotional interaction and verbal interaction affect the development of social relationships. Early results regarding this and coding schemes for video protocol analysis were gained. In this preliminary study, the findings are summarized and several design implications from insight grouping are suggested. These will help robot designers grasp how various factors of robotic products may be adopted in the everyday lives of people.
Keywords:
Robotic Products Design, HRI Evaluation, User-Centered HRI.</p
Scalar kappa meson in K* photoproduction
We propose that the scalar meson may play an important role in
photoproduction. In the reactions of and
, we consider the production mechanisms including
-channel , , exchanges, s-channel , diagrams,
and -channel , , diagrams within the tree level
approximation, and find that the -meson exchange may contribute
significantly to photoproduction, while it is rather supplementary
in photoproduction. We demonstrate how the observables of
photoproduction can be used to constrain the meson properties. In
particular, the parity asymmetry can separate the meson contribution
in photoproduction.Comment: 9 pages, 4 figures, REVTe
Flavor structure of pentaquark baryons in quark model
The flavor SU(3) group structure of pentaquark baryons which form ,
, , , , and multiplets is
investigated in quark model. The flavor wave functions of all the pentaquark
baryons are constructed in SU(3) quark model and their Yukawa interactions with
meson octet are obtained in general and in the special case of the
octet-antidecuplet ideal mixing with the OZI rule. The mass sum rules of
pentaquark baryons are also discussed.Comment: 8 pages, talk presented at International Workshop PENTAQUARK04 at
SPring-8, Japan, July 20-23, 200
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