10,597 research outputs found
NASA space station automation: AI-based technology review
Research and Development projects in automation for the Space Station are discussed. Artificial Intelligence (AI) based automation technologies are planned to enhance crew safety through reduced need for EVA, increase crew productivity through the reduction of routine operations, increase space station autonomy, and augment space station capability through the use of teleoperation and robotics. AI technology will also be developed for the servicing of satellites at the Space Station, system monitoring and diagnosis, space manufacturing, and the assembly of large space structures
Synthetic sequence generator for recommender systems - memory biased random walk on sequence multilayer network
Personalized recommender systems rely on each user's personal usage data in
the system, in order to assist in decision making. However, privacy policies
protecting users' rights prevent these highly personal data from being publicly
available to a wider researcher audience. In this work, we propose a memory
biased random walk model on multilayer sequence network, as a generator of
synthetic sequential data for recommender systems. We demonstrate the
applicability of the synthetic data in training recommender system models for
cases when privacy policies restrict clickstream publishing.Comment: The new updated version of the pape
Multilevel Hashing based Access Control for Authentication and Security in Relational Database Management System
The relational database is very widely used in these days and so as the relational database security is very vital to protect from different kinds of threats and attacks. The security of relational database is very important because now these days all data and information are stored in database by some form of database objects including user’s personal information like credit/debit card details, username, passwords etc. as well as confidential data of business organization and companies. Many researches are done in order to protect the relational database from these vulnerabilities but the methodologies of relational database security are not able to protect the relational database from all security issues. Authentication of users is an important issue in the database that is needed to be addressed most because it can give full access to the database objects. In this paper we present various security issues that can cause degradation in relational database security and we also identify various problems in the current database security policies. In this paper we propose the use of Multilevel Hashing based Access control mechanism for authentication and security in Relational database
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