منابع مشابه
Chasing after Secrets in Relational Databases
Inference control can guarantee confidentiality but is costly to implement. Access control can be implemented efficiently but cannot guarantee confidentiality. Hence, it is a natural question to ask when exactly inference control becomes necessary. We characterize the situation in which it becomes possible to infer secrets without any violation of a given access control policy. For this purpose...
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Toxic leucoencephalopathy (TLE) is a rare neurological complication of heroin abuse. 'Chasing the dragon' is an inhalational mode of heroin abuse that originated in Southeast Asia. Intriguingly, no cases of TLE have been reported from this region, although the inhalational mode of heroin abuse is common. We herein report the case of a middle-aged man with a history of polysubstance abuse who pr...
متن کاملChasing after Non-cyanobacterial Nitrogen Fixation in Marine Pelagic Environments
Traditionally, cyanobacterial activity in oceanic photic layers was considered responsible for the marine pelagic dinitrogen (N2) fixation. Other potentially N2-fixing bacteria and archaea have also been detected in the pelagic water column, however, the activity and importance of these non-cyanobacterial diazotrophs (NCDs) remain poorly constrained. In this perspective we summarize the N2 fixa...
متن کاملThe Fallacy of Chasing after Work-Life Balance
As a pediatric intensivist and clinicianscientist, finding a balance between work and life is essential to my professional success and my personal happiness. Failure to achieve a healthy balance will result in burn-out. So I was warned all these years since the first day of medical school. In 2013, 180 articles documented that physicians are highly dissatisfied with their jobs. This is a testam...
متن کاملChasing Constrained
We investigate the implication problem for constrained tuple-generating dependencies (CTGDs), the extension of tuple-and equality-generating dependencies that permits expression of semantic relations (constraints) on variables. The implication problem is central to identifying redundant integrity constraints, checking integrity constraints on constraint databases, detecting the independence of ...
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ژورنال
عنوان ژورنال: Chemistry & Biology
سال: 2009
ISSN: 1074-5521
DOI: 10.1016/j.chembiol.2009.10.001