Xiaojun Yuan

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This study statistically evaluates the relationship between Antarctic Sea Ice extent and global climate variability. Temporal cross-correlations between detrended Antarctic sea ice edge (SIE) anomaly and various climate indices are calculated. For the sea surface temperature (SST) in the eastern equatorial Pacific and tropical Indian Ocean, as well as the(More)
, Air-sea-ice interaction processes in the Southern Ocean are investigated utilizing space-observed surface winds, sea ice concentration, and sea surface temperature (SST) from September through December, 1996. The sea ice edge (SIE) shows three ice-extent maxima around the Antarctic during September and October when sea ice coverage is maximum. They are(More)
We report findings that help us better understand the difficulty of tasks which involve information seeking, retrieving, gathering, and use. We examined the data gathered from two interactive information retrieval user studies on how users' perception of task difficulty changes before and after searching for information to solve tasks, and how the(More)
[1] A wavelet-based method is described for incorporating swaths of surface pressure derived from scatterometer measurements into surface pressure analyses obtained from the European Centre for Medium-range Weather Forecasts (ECMWF). The resulting modified pressure fields are used to identify low-pressure centers over the Southern Ocean and to build(More)
A Content, Context, Connection and Researching, Reasoning, Reflecting (3C3R) model is a conceptual framework for problem-based learning (PBL) problem design. We introduced the 3C3R-PBL method into a pediatric teaching plan, and evaluated its effectiveness and feasibility. The 3C3R model was applied in a pediatric problem design teaching plan "why the lips(More)
Studies have shown that cognitive styles have some impacts on user performance in various types of systems. The current study focused on the effects of cognitive styles on users' information-seeking task performance between an information visualization system and a generic information system. Thirty-two graduate students participated in a controlled(More)
In this paper, we report findings on an examination of the document selecting behaviors of people with different levels of domain knowledge (DK). We found that people with high and low DK levels generally select different sets of documents to view; those high in DK read more documents and gave higher relevance ratings for the documents they view than those(More)
BACKGROUND Sacrococcygeal teratoma (SCT) is a relatively uncommon tumor. Recurrence with poor survival and anorectal dysfunction are the 2 leading problems for patients. Here, we would review the clinic features of patients with SCTs in our hospital to identify risk factors of recurrent SCTs and to analyze anorectal functional sequelae. MATERIAL AND METHODS(More)
OBJECTIVE Langerhans cell histiocytosis is an unusual disorder of unknown etiology with heterogeneous clinical behaviors and variable outcomes. It can involve one or more organs or systems, but to our best knowledge, parotid glands involvement in Langerhans cell histiocytosis is extremely rare in English literature. METHOD We report a 13-month-old girl(More)