43 results for “Temporal Models”

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Research ArticleOpen accessAll words, across the recordSpatio-Temporal Anomaly Detection in Groundwater Electrical Conductivity Using a Hybrid Framework of Isolation Forest and AutoencoderEunji Lee, Seunghyun Lim, Seojun Lee, Abhijit DebnathMonitoring groundwater quality is vital for environmental safety and resource sustainability. This study combines Isolation Forest and Autoencoder models to detect anomalies in Electrical Conductivity (EC) and temperature, using monthly data collected in South Korea between 2006 and 2023. Linear regression and the Mann-Kendall test reveal a weak, episodic downward EC trend. Seasonal decomposition indicates annual cyclicality, while residual analysis … …Journal of Computer Science, Vol. 22, Issue 1 · 14 Feb 2026 · 1,918 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordA Frame Study for Post-Processing Analysis on System Behavior: A Case Study of Deadline Miss DetectionJunghee Lee, Jongman KimProblem statement: A lot of data can be obtained by system simulation using transaction level models without affecting the performance of the system. Due to huge amount of the raw data, we often need to post-process them to extract valuable information. Profiling capabilities of commercial tools provide predefined functionalities and don’t allow users to add or modify for their own … …Journal of Computer Science, Vol. 6, Issue 12 · 22 Nov 2010 · 6,741 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordAdaptive Update Policy for Proactive Management of Deadline Miss Ratio and Data Freshness in Real-Time Database ModelsSanjay Tanwani, Ashwani K. RamaniImportant applications, like e-commerce, online stock trading, traffic control demand real-time data services. Conventional database perform poor at these applications. A database for real-time data services has to support timing constraints and temporal consistency in addition to supporting characteristics of a conventional database system. In other words, it is desirable to execute transactions within its deadline using updated data reflecting … …Journal of Computer Science, Vol. 1, Issue 4 · 31 Dec 2005 · 6,207 accessesView PDF Cite