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Role Based Access Control (RBAC) is a very popular access control model, for long time investigated and widely deployed in the security architecture of different enterprises. To implement RBAC, roles have to be firstly identified within the…

Cryptography and Security · Computer Science 2015-03-20 Carlo Blundo , Stelvio Cimato

In large databases, creating user interface for browsing or performing insertion, deletion or modification of data is very costly in terms of programming. In addition, each modification of an access control policy causes many potential and…

Cryptography and Security · Computer Science 2015-06-01 Kambiz Ghazinour , Mehdi Ghayoumi

With increasing emphasis on transparency in digital governance, users expect more than silence when their access requests are denied by a system. However, authorization methods are notorious for their inability to provide any form of…

Cryptography and Security · Computer Science 2026-04-15 Shanampudi Pranaya Chowdary , Shamik Sural

DSS serve the management, operations, and planning levels of an organization and help to make decisions, which may be rapidly changing and not easily specified in advance. Data mining has a vital role to extract important information to…

Databases · Computer Science 2012-10-12 Pardeep Kumar , Nitin , Vivek Kumar Sehgal , Durg Singh Chauhan

A fine-grained provenance-based access control policy model is proposed in this paper, in order to improve the express performance of existing model. This method employs provenance as conditions to determine whether a piece of data can be…

Cryptography and Security · Computer Science 2020-01-08 Xinyu Fan , Faen Zhang , Jianfei Song , Jingming Guo , Fujie Gao

Embedding-based retrieval (EBR) methods are widely used in modern recommender systems thanks to its simplicity and effectiveness. However, along the journey of deploying and iterating on EBR in production, we still identify some fundamental…

Information Retrieval · Computer Science 2023-02-07 Yuan Zhang , Xue Dong , Weijie Ding , Biao Li , Peng Jiang , Kun Gai

Feature selection plays a critical role in biomedical data mining, driven by increasing feature dimensionality in target problems and growing interest in advanced but computationally expensive methodologies able to model complex…

Data Structures and Algorithms · Computer Science 2018-04-04 Ryan J. Urbanowicz , Melissa Meeker , William LaCava , Randal S. Olson , Jason H. Moore

Traditional statistical and measurements are unable to solve all industrial data in the right way and appropriate time. Open markets mean the customers are increased, and production must increase to provide all customer requirements.…

General Economics · Economics 2020-11-26 Hamza Saad

The problems which are important for the effective functioning of an access control policy in a large information system (LIS) are selected. The general concept of a local optimization of a role-based access control (RBAC) model is…

Cryptography and Security · Computer Science 2018-12-27 N. F. Bogachenko

Reinforcement learning (RL) is emerging as a powerful paradigm for enabling large language models (LLMs) to perform complex reasoning tasks. Recent advances indicate that integrating RL with retrieval-augmented generation (RAG) allows LLMs…

Computation and Language · Computer Science 2025-08-13 Wentao Jiang , Xiang Feng , Zengmao Wang , Yong Luo , Pingbo Xu , Zhe Chen , Bo Du , Jing Zhang

The state-of-the-art solutions to the vocabulary mismatch in information retrieval (IR) mainly aim at leveraging either the relational semantics provided by external resources or the distributional semantics, recently investigated by deep…

Information Retrieval · Computer Science 2017-07-28 Gia-Hung Nguyen , Laure Soulier , Lynda Tamine , Nathalie Bricon-Souf

Policy-gradient methods are widely used for learning control policies. They can be easily distributed to multiple workers and reach state-of-the-art results in many domains. Unfortunately, they exhibit large variance and subsequently suffer…

Machine Learning · Computer Science 2022-09-29 Gal Dalal , Assaf Hallak , Shie Mannor , Gal Chechik

Recent advancements in language models (LMs) have notably enhanced their ability to reason with tabular data, primarily through program-aided mechanisms that manipulate and analyze tables. However, these methods often require the entire…

We propose a learning-based scheme to investigate the dynamic multi-channel access (DMCA) problem in the fifth generation (5G) and beyond networks with fast time-varying channels wherein the channel parameters are unknown. The proposed…

Signal Processing · Electrical Eng. & Systems 2020-04-01 Shaoyang Wang , Tiejun Lv , Xuewei Zhang , Zhipeng Lin , Pingmu Huang

Reinforcement learning (RL), while often powerful, can suffer from slow learning speeds, particularly in high dimensional spaces. The autonomous decomposition of tasks and use of hierarchical methods hold the potential to significantly…

Artificial Intelligence · Computer Science 2017-09-18 Behzad Ghazanfari , Matthew E. Taylor

The process of data mining produces various patterns from a given data source. The most recognized data mining tasks are the process of discovering frequent itemsets, frequent sequential patterns, frequent sequential rules and frequent…

Databases · Computer Science 2014-02-13 Thabet Slimani , Amor Lazzez

The scaling of Large Language Model (LLM) services faces significant cost and latency challenges, making effective caching under tight capacity crucial. Existing cache replacement policies, from heuristics to learning-based methods,…

Databases · Computer Science 2026-02-26 Yuchong Wu , Zihuan Xu , Wangze Ni , Peng Cheng , Lei Chen , Xuemin Lin , Heng Tao Shen , Kui Ren

The convergence of mobile edge computing (MEC) and blockchain is transforming the current computing services in mobile networks, by offering task offloading solutions with security enhancement empowered by blockchain mining. Nevertheless,…

Signal Processing · Electrical Eng. & Systems 2021-09-30 Dinh C. Nguyen , Ming Ding , Pubudu N. Pathirana , Aruna Seneviratne , Jun Li , H. Vincent Poor

Improving the precision of heart diseases detection has been investigated by many researchers in the literature. Such improvement induced by the overwhelming health care expenditures and erroneous diagnosis. As a result, various…

Computers and Society · Computer Science 2018-03-29 Israa Ahmed Zriqat , Ahmad Mousa Altamimi , Mohammad Azzeh

Retrieval-Augmented Generation (RAG) has proven effective in integrating external knowledge into large language models (LLMs) for solving question-answer (QA) tasks. The state-of-the-art RAG approaches often use the graph data as the…

Information Retrieval · Computer Science 2026-05-12 Shu Wang , Yixiang Fang , Yingli Zhou , Xilin Liu , Yuchi Ma