Over the past several decades, computational approaches to studying strongly-interacting systems have become increasingly varied and sophisticated. This book provides a comprehensive introduction to state-of-the-art quantum Monte Carlo techniques relevant for applications in correlated systems. Providing a clear overview of variational wave functions, and featuring a detailed presentation of stochastic samplings including Markov chains and Langevin dynamics, which are developed into a discussion of Monte Carlo methods. The variational technique is described, from foundations to a detailed description of its algorithms. Further topics discussed include optimisation techniques, real-time dynamics and projection methods, including Green´s function, reptation and auxiliary-field Monte Carlo, from basic definitions to advanced algorithms for efficient codes, and the book concludes with recent developments on the continuum space. Quantum Monte Carlo Approaches for Correlated Systems provides an extensive reference for students and researchers working in condensed matter theory or those interested in advanced numerical methods for electronic simulation.
Implement a robust SIEM system Effectively manage the security information and events produced by your network with help from this authoritative guide. Written by IT security experts, Security Information and Event Management (SIEM) Implementation shows you how to deploy SIEM technologies to monitor, identify, document, and respond to security threats and reduce false-positive alerts. The book explains how to implement SIEM products from different vendors, and discusses the strengths, weaknesses, and advanced tuning of these systems. You´ll also learn how to use SIEM capabilities for business intelligence. Real-world case studies are included in this comprehensive resource. Assess your organization´s business models, threat models, and regulatory compliance requirements Determine the necessary SIEM components for small- and medium-size businesses Understand SIEM anatomy-source device, log collection, parsing/normalization of logs, rule engine, log storage, and event monitoring Develop an effective incident response program Use the inherent capabilities of your SIEM system for business intelligence Develop filters and correlated event rules to reduce false-positive alerts Implement AlienVault´s Open Source Security Information Management (OSSIM) Deploy the Cisco Monitoring Analysis and Response System (MARS) Configure and use the Q1 Labs QRadar SIEM system Implement ArcSight Enterprise Security Management (ESM) v4.5 Develop your SIEM security analyst skills
Computer-aided diagnosis systems are currently at the heart of many clinical protocols. This book puts forward a hierarchical architecture for the design of a robust and efficient CAD tool for breast cancer detection. It focuses on the reduction of false alarms rate through the identification of image regions of foremost interest (potential cancerous areas). The dynamic range of the image is stretched to enhance the contrast between tissues and background and favors accurate breast region extraction. Then follow pectoral muscle segmentation since it regularly tampers breast tissue analysis. Extracting pectoral muscle tissues is both hard and challenging due to its overlap with dense tissues. To overcome this difficulty, a validation process followed by a refinement strategy is proposed to detect and correct the segmentation imperfections. In the last chapter dealing with breast density analysis, to address the inter-variability in gray levels distributions, an optimized gray level transport map is introduced for contrast standardization. With this technique, dense region areas computed using simple thresholding are highly correlated to density classes from an annotated dataset.