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A query optimizer is a core component of any Database Management System. Multiple approaches have been suggested which were based on framework of classical query evaluation procedures that heavily dependent on metadata. There are computational environments where metadata acquisition and support is very expensive. In this paper an optimization technique for complex queries using case based reasoning (machine learning technique) in ubiquitous computing environment is deliberated. In this technique a new problem is solved by finding a similar past case, and reusing it in the new problem situation. As CBR is an approach to incremental, sustained learning, since a new experience is retained each time a problem has been solved, making it immediately available for future problems which in return may create a bulky case base. Thus we were proposing a technique of dynamic deletion of irrelevant cases from case base. Through which system can detect the inappropriate cases and replace them with
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Abstract- The rise in global oil demand along with current environmental crisis; global warming and climate mitigation has been a serious issue. Thus, the need for an alternative fuel from renewable resources that promotes sustainability is vital to replace our dependence on fossil fuel. High sugar content in Oil Palm Frond Juice (OPFJ) indicates its potential as a feedstock in ethanol fermentation. Two strains of Saccharomyces cerevisiae; SA79 and HC10 are screened for high fermentation efficiency. Percentage yield bioethanol revealed that S. cerevisiae HC10 (55.72%) was proven a better strain than S. cerevisiae SA79 (43.19%). A growth profile of S. cerevisiae HC10 was performed in 60 h time period with 6 h interval sampling time. Specific growth rate (µ) and doubling time (td) of 0.037h-1 and 18.7h, respectively shows that S. cerevisiae HC10 fermentation of OPFJ is industrially applicable. In OPFJ fermentation, S. cerevisiae HC10 shows a much better yield (79.77 %) and thus an optim
Jakarta, Indonesia CNN - President and CEO of XL Axiata, Hasnul Suhaimi, claimed to have set up a number of names to replace him someday. After preparing for three years, Hasnul have determined the choice to Dian XL Siswarini to be a leader in the future. "Bu Dian is my replacement candidates. Candidates CEO. When did this happen? Wait for me on the game, "said Hasnul in a press conference in Jakarta, Wednesday (7/1).
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