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Wireless Sensor Networks for Monitoring the Daily Interactions between User and Objects
Masayuki Nakamura,Masayuki Tsuda,Kazue Takahashi,Jiro Nakamura 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This article presents a hybrid system of wireless sensor networks and active tags in order to monitor user"sbehaviors of handling objects. The sensor networks consist of an acceleration sensor node that the user carries and occupancy sensor nodes that are deployed in a workplace. The active tags, which are embedded with switch sensors, vibration sensors and occupancy sensors, are attached to objects. The sensor networks capture the user"s movements andthe active tags detect the objects" movements. The sensor nodes have the parent selection function that can allocate resources to the nodes. We demonstrate monitoring the user"s behaviors of handling the objects using the hybrid system.We also show that the proposed system provides the useful information for behavior classification.
( Saya Tsuda ),( Reiko Kunisaki ),( Jun Kato ),( Mayu Murakami ),( Masafumi Nishio ),( Tsuyoshi Ogashiwa ),( Takeichi Yoshida ),( Hideaki Kimura ),( Masayuki Kitano ) 대한장연구학회 2018 Intestinal Research Vol.16 No.4
Background/Aims: In clinical practice, colonoscopy has been regarded as the gold standard for the evaluation of disease severity as well as mucosal healing in ulcerative colitis (UC). Some activity indices incorporating patient symptoms as parameters have been shown to reflect the endoscopic activity of UC. The aim of this study was to examine whether self-reported symptoms with visual analog scales (VAS) can predict endoscopic activity. Methods: A cross-sectional study of 150 UC patients who underwent colonoscopy with submission of VAS scores of 4 symptoms: general condition, bloody stools, stool form, and abdominal pain (0: no symptoms, 10: the most severe symptoms). Each VAS score was compared with colonoscopic activity assessed with the Mayo endoscopic subscore (MES). Results: All VAS scores were significantly correlated with the endoscopic severity (Spearman correlation coefficients of general condition, bloody stools, stool form, and abdominal pain: 0.63, 0.64, 0.58, and 0.43, respectively). Mucosal healing defined as MES 0 alone was predicted by VAS score <1.5 on general condition or 0 on bloody stools with sensitivity of 0.84 and 0.76 and specificity of 0.66 and 0.76, respectively. Additionally, VAS score <2.5 on stool form predicted active lesions in distal colorectum alone with sensitivity of 0.67 and specificity of 0.66, suggesting that this item could predict the indication of topical therapy. Conclusions: Self-reported VAS scores on symptoms were correlated with endoscopic activity of UC. To clarify the relationship between VAS and mucosal healing, further validation studies are needed. (Intest Res 2018;16:579-587)