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Active Clustering Data Streams with Affinity Propagation
Sameh Abdulah,Walid Atwa,Ahmed M. Abdelmoniem 한국통신학회 2022 ICT Express Vol.8 No.2
Most existing applications have a large number of evolving data streams. Clustering data streams is still a critical problem for these applications as the data are evolving and changes over time. Most existing algorithms are unsupervised learning in which background information is useless. This paper proposes an active clustering algorithm for data stream based on the affinity propagation method, referred to as AAPStream. The affinity propagation aims to identify exemplars and create clusters based on these exemplars. Thus, the objective is to get the most informative exemplars to create the streaming model and predict the new arrival data. We conduct a set of experiments on real-world datasets to compare our algorithm with a state-of-the-art algorithm, and the experimental results show the effectiveness of the proposed algorithm.
Abdelwahab Hashem,Fady K. Ghobrial,M. A. Elbaset,Ahmed M. Atwa,Mohamed Fadallah,Mahmoud Laymon,Ahmed El-Assmy,Khaled Z. Sheir,Hassan Abol-Enein 대한비뇨의학회 2019 Investigative and Clinical Urology Vol.60 No.4
Purpose: To compare the safety and efficacy of xylocaine gel and ketorolac as opioid-sparing analgesia compared with pethidine for shock wave lithotripsy (SWL) pain. Materials and Methods: A single-blinded randomized controlled trial (RCT) was performed in 132 patients with renal and upper ureteral stones amenable to treatment with SWL. The first patient group received intravenous (IV) pethidine and placebo gel; the second group received IV ketorolac plus placebo gel; the third group received lidocaine gel locally plus normal saline IV. Stone disintegration was classified as none (no change from basal by kidney, ureter, bladder X-ray or ultrasound [US] imaging), partial (fragmented and >4-mm residual fragments), and complete (≤4-mm residual fragments). Stone disintegration was assessed by kidney-ureter-bladder X-ray and US imaging. Pain was evaluated by use of the Numeric Pain Rating Scale (NPRS). Results: The NPRS scores were highest in the xylocaine group at 10, 20, and 30 minutes (p=0.0001) with no significant difference between the ketorolac and pethidine groups, except at 10 minutes (p=0.03) and a near significant difference at 30 minutes (p=0.054) in favor of ketorolac. Results for stone disintegration (none, partial, and complete, respectively) were as follows: 25 (50.0%), 23 (46.0%), and 2 (4.0%) for pethidine; 19 (35.8%), 23 (43.4%), and 11 (20.8%) for ketorolac; and 26 (89.7%), 3 (10.3%), and 0 (0.0%) for lidocaine (p=0.008). Conclusions: Ketorolac is a safe and more effective alternative to morphine derivatives for SWL analgesia. Lidocaine gel should not be used as mono-analgesia for SWL.