This paper presents an unsupervised relation extraction method for discovering and enhancing relations in which a speciﬁed concept in Wikipedia participates. Using respective characteristics of Wikipedia articles and Web corpus, we develop a clustering approach based on combinations of patterns: dependency patterns from dependency analysis of texts in Wikipedia, and surface patterns generated from highly redundant information related to the Web. Evaluations of the proposed approach on two different domains demonstrate the superiority of the pattern combination over existing approaches. ...
Hidden Markov models (HMMs) are powerful statistical models that have found successful applications in Information Extraction (IE). In current approaches to applying HMMs to IE, an HMM is used to model text at the document level. This modelling might cause undesired redundancy in extraction in the sense that more than one ﬁller is identiﬁed and extracted. We propose to use HMMs to model text at the segment level, in which the extraction process consists of two steps: a segment retrieval step followed by an extraction step. ...
In this paper, we put forward an information theoretic deﬁnition of the redundancy that is observed across the sound inventories of the world’s languages. Through rigorous statistical analysis, we ﬁnd that this redundancy is an invariant property of the consonant inventories. The statistical analysis further unfolds that the vowel inventories do not exhibit any such property, which in turn points to the fact that the organizing principles of the vowel and the consonant inventories are quite different in nature. ...
This paper describes an empirical study of the “Information Synthesis” task, deﬁned as the process of (given a complex information need) extracting, organizing and inter-relating the pieces of information contained in a set of relevant documents, in order to obtain a comprehensive, non redundant report that satisﬁes the information need.
Answer Validation is an emerging topic in Question Answering, where open domain systems are often required to rank huge amounts of candidate answers. We present a novel approach to answer validation based on the intuition that the amount of implicit knowledge which connects an answer to a question can be quantitatively estimated by exploiting the redundancy of Web information. Experiments carried out on the TREC-2001 judged-answer collection show that the approach achieves a high level of performance (i.e. 81% success rate).
Database System: Chapter 7 - Functional Dependencies includes Informal Design Guidelines for Relational Databases (Semantics of the Relation Attributes, Redundant Information in Tuples and Update Anomalies, Null Values in Tuples, Spurious Tuples), Functional Dependencies (FDs).
Chapter 7: Functional Dependencies presents about Informal Design Guidelines for Relational Databases (Semantics of the Relation Attributes, Redundant Information in Tuples and Update Anomalies, Null Values in Tuples, Spurious Tuples), Functional Dependencies (FDs).
Chapter 18 - Implementing an REA model in a relational database. In this chapter, the learning objectives are: Integrate separate REA diagrams for individual business cycles into a single, comprehensive organization-wide REA diagram; build a set of tables to implement an REA model of an AIS in a relational database; explain how to write queries to retrieve information from an AIS relational database built according to the REA data model.
Appendix C - Designing databases. After completing this unit, you should be able to: Describe the purpose of the relational database model in a database management system, list the relational database model’s basic components, describe why entities and attributes are organized into tables and fields, describe how data redundancy is handled in the relational database model.
Oracle Real Application Clusters (RAC) enables multiple instances that are linked by
an interconnect to share access to an Oracle database. This enables RAC to provide
high availability, scalability, and redundancy during failures. RAC provides scalability
without requiring application code changes.This book is intended for chief technology officers, information technology architects,
database administrators, system administrators, network administrators, and
application administrators who perform the following tasks:...
This design guide defines the comprehensive functional components required to build an enterprise virtual private network (VPN) solution that can transport IP telephony and video. This design guide identifies the individual hardware requirements and their interconnections, software features, management needs, and partner dependencies, to enable customers to deploy, manage, and maintain an enterprise VPN solution.
Offers hierarchy—each layer has
• Modular topology—building blocks
• Easy to grow, understand, and
• Creates small fault domains—clear
demarcations and isolation
• Promotes load balancing and
• Promotes deterministic traffic patterns
• Incorporates balance of both Layer 2 and
Layer 3 technology, leveraging the
strength of both
• Can be applied to all campus designs;
multilayer L2/L3 and routed access
The main problem is that the cause and effect of certain faults are still unclear. More research is required to find out which sensors are more adequate for monitoring specific faults so that redundant information can be minimized. Furthermore, more work has to be done to reduce the size and cost of the sensors so that a ‘complete sensing’ approach can be seriously taken into account.
Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học quốc tế cung cấp cho các bạn kiến thức về ngành y đề tài: Indications that "codon boundaries" are physico-chemically defined and that protein-folding information is contained in the redundant exon bases
Greenplum Database is architected to have no single point of failure. Internally the system utilizes log shipping
and segment-level replication to achieve redundancy, and provides automated failover and fully online “self-healing”
The system provides multiple levels of redundancy and integrity checking. At the lowest level, Greenplum Database
utilizes RAID-0+1 or RAID-5 storage to detect and mask disk failures.
For each weak entity type W in the ER schema with owner entity type E, create a relation R and include all simple attributes (or simple components of composite attributes) of W as attributes of R.
In addition, include as foreign key attributes of R the primary key attribute(s) of the relation(s) that correspond to the owner entity type(s).
The primary key of R is the combination of the primary key(s) of the owner(s) and the partial key of the weak entity type W, if any.
GUIDELINE 3: Relations should be designed such that their tuples will have as few NULL values as possible
Attributes that are NULL frequently could be placed in separate relations (with the primary key)
Reasons for nulls:
attribute not applicable or invalid
attribute value unknown (may exist)
value known to exist, but unavailable
Some DoS attacks can be avoided by applying vendor patches to affected software. For
example, many vendors have patched their IP implementations to prevent intruders from
taking advantage of the IP reassembly bugs. A few DoS attacks cannot be stopped, but their
scope of affected areas can be constrained.
The Columbia Arabic Treebank (CATiB) is a database of syntactic analyses of Arabic sentences. CATiB contrasts with previous approaches to Arabic treebanking in its emphasis on speed with some constraints on linguistic richness. Two basic ideas inspire the CATiB approach: no annotation of redundant information and using representations and terminology inspired by traditional Arabic syntax. We describe CATiB’s representation and annotation procedure, and report on interannotator agreement and speed. ...