Konkuk University

About: Konkuk University is a education organization based out in Seoul, South Korea. It is known for research contribution in the topics: Population & Apoptosis. The organization has 13405 authors who have published 27027 publications receiving 506313 citations.

The role of user mood in movie recommendations

Abstract: Studies in consumer research indicate that mood states have effects on user behaviors and evaluation. In movie recommendation, a user in a bad mood might decide to rate some movies more harshly. In this paper, we examine how users' mood can have an impact on their appraisal of movies in different genres, which in turn can help inform recommender system of picking up movies that are appropriate for users in different mood. Specifically, we carried out two studies. The first consists of a series of user studies to examine user mood and movie ratings to answer questions like: will a user in a more positive mood tend to rate a romantic comedy higher? Will a user in a more nervous mood tend to rate an action movie higher? Then, drawn upon the results from the first study, we modify the traditional collaborative-filtering based recommendation approach by injecting user mood and proposed a mood-aware collaborative-filtering approach. Empirical studies demonstrate that the mood-aware recommendation approach performs better than traditional one that does not consider mood.

Central lymph node metastases in unilateral papillary thyroid microcarcinoma

Abstract: Background: The indications for and appropriate extent of prophylactic central lymph node (CLN) dissection for clinically node-negative patients with unilateral papillary thyroid microcarcinoma (PTMC) are unknown. Methods: The frequency, patterns and predictive factors for CLN metastases in 86 patients with unilateral PTMC and a clinically node-negative neck were analysed with respect to age and sex; metastasis, age, completeness, invasiveness, size (MACIS) score; tumour size; number and location of tumours; presence of ipsilateral CLN metastases; and presence of lymphovascular or capsular invasion. All patients underwent total thyroidectomy and CLN dissection. Results: Twenty-seven (31 per cent) of 86 patients had metastatic CLNs: 18 ipsilateral and nine bilateral. Univariable analysis suggested male sex and tumour size greater than 0·5 cm to be significant factors in predicting ipsilateral CLN metastases. Only ipsilateral nodal positivity was a significant predictor of contralateral CLN metastases in multivariable analysis (P = 0·007). Conclusion: CLN metastases are relatively common in PTMC. Copyright © 2009 British Journal of Surgery Society Ltd. Published by John Wiley & Sons, Ltd.

Efficacy and Safety of Combination Antiplatelet Therapies in Patients With Symptomatic Intracranial Atherosclerotic Stenosis

Abstract: Background and Purpose—An optimal strategy for management of symptomatic intracranial atherosclerotic stenosis (ICAS) has not yet been established. We compared the efficacy of 2 combinations of antiplatelets, aspirin plus cilostazol (cilostazol group) verus aspirin plus clopidogrel (clopidogrel group), on the progression of ICAS, which is known to be associated with clinical stroke recurrence. Methods—In this investigator-initiated double-blind trial, 457 patients with acute symptomatic stenosis in the M1 segment of the middle cerebral artery or the basilar artery were randomly allocated into either a cilostazol group or a clopidogrel group. After 7 months of treatment, follow-up MR angiogram and MRI were performed. The primary end point was the progression of ICAS in comparison with stenosis on the baseline MR angiogram. Secondary end points included the occurrence of new ischemic lesions on MRI, composite of cardiovascular events, and major bleeding complications. Results—Cardiovascular events occurred ...