• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Object-Oriented Design Process and Design Axioms
Object-Oriented Design Process and Design Axioms

... ◊ Designing classes (their attributes, methods, associations, structures, and protocols) and applying design axioms. If needed, this step is repeated. ◊ Designing the access layer. ◊ Designing the user interface (view layer classes). ◊ Testing user satisfaction and usability, based on the usage and ...
Using Markov Chain Monte Carlo to Play Trivia
Using Markov Chain Monte Carlo to Play Trivia

... proportion directly is of course infeasible [8], thus we provide a sampling algorithm as explained next. Query Evaluation: We use the algorithm of [8] for query evaluation. Recall the analogy between our probabilistic update rules and Markov Chains. In principal, we can use for query evaluation a Ma ...
SDE-based access control mechanism
SDE-based access control mechanism

... The use of map is crucial for correctly geoprocessing data. Currently, several commercial map management systems support visualization and editing of spatial objects on Web. Enforcing controlled access to spatial data has not been much investigated to ensure confidentiality and integrity of inform ...
Data structures and DBMS for CAD Systems- A review
Data structures and DBMS for CAD Systems- A review

... data whose relationships could not be represented by a single tree could efficiently stored as a collection of trees. IMS did not capture the semantics of the data it stored beyond being able to represent relationships between records. Individual fields were not identified by the database management ...
Slide Template
Slide Template

... Chapter 16 Object-Oriented Database Processing ...
0168 - Parallel Processing Benchmarks
0168 - Parallel Processing Benchmarks

... allocate less CPU power to the archive/purge process because they might run a 24/7 operation or they may have batch processing occurring at the same time. Other customers may lock all users and processes out while archive/purge is running, and therefore, allocate more or all CPU power to the archiv ...
Part2 - UCSB Computer Science
Part2 - UCSB Computer Science

... ▪ No knowledge of pages, buffers, physical structure ...
Chp4: Relational Algebra
Chp4: Relational Algebra

... Cross-product ( ) Allows us to combine two relations. Set-difference ( ) Tuples in reln. 1, but not in reln. 2. Union (  ) Tuples in reln. 1 and in reln. 2. Intersection, join, division, renaming: Not essential, but (very!) useful. ...
370 - ClassicCMP
370 - ClassicCMP

... Applications • Every Speedware development toolset offers crossplatform portability as one of its core features. • Most applications built with Speedware technology can be easily ported to any other supported platform without modifying the code at all. • Operating System Switches permit developers t ...
Relation
Relation

... digit. E.g., Dates have various formats such as monthname, date, year or yyyy-mm-dd, or dd mm,yyyy etc. ...
Database Security: What Students Need to Know
Database Security: What Students Need to Know

... card numbers by exploiting a well known database vulnerability, a SQL injection (Phifer, 2010). The Verizon Business Risk Team, who have been reporting data breach statistics since 2004, examined 90 breaches during the 2008 calendar year. They reported that more than 285 million records had been com ...
Lecture 3: Hash indexing, index selection
Lecture 3: Hash indexing, index selection

... use two I/Os for lookup. – When inserting x, choose the least loaded block among h1 and h2. ...
Chapter 3 Effects of IT on Strategy and Competition
Chapter 3 Effects of IT on Strategy and Competition

... Locking Mechanisms • Locking level: ...
Database Intro - La Salle University
Database Intro - La Salle University

... Rule 3: Systematic Treatment of Null Values. A field should be allowed to remain empty. This involves the support of a null value, which is distinct from an empty string or a number with a value of zero. Of course, this can't apply to primary keys. In addition, most database implementations support ...
PowerPoint for this Session
PowerPoint for this Session

... Executing an SQL statement: mysql_query(cmd, conn) Executes a specific command or query using a database connection If cmd is a SELECT statement, function returns a set of records If cmd is INSERT, DELETE, UPDATE, $result true if successful, false if not $result = mysql_query($sql, $dblink) or die ( ...
NoSQL DATABASES - KTH-SEECS Applied Information Security Lab
NoSQL DATABASES - KTH-SEECS Applied Information Security Lab

... Security”, IEEE Asia-Pacific Services Computing Conference (IEEE APSCC), 2009, pp. 4651 Imal Sakhi, “Databases Security in Cloud”, 2012 Carrenza, “DATABASE AS A SERVICE”, Available: http://carrenza.com/services/usecases/database-as-a-service/ Zhizhong Zhang, Chuan Wu, David W.L. Cheung, “A Survey on ...
Chapter 9: Database Systems
Chapter 9: Database Systems

... • Matches design paradigm of objectoriented applications • Intelligence can be built into attribute handlers • Can handle exotic data types – Example: multimedia ...
Chapter 9 Database System
Chapter 9 Database System

... • Matches design paradigm of objectoriented applications • Intelligence can be built into attribute handlers • Can handle exotic data types – Example: multimedia ...
Document
Document

... Better support for client/server systems Economy of scale Flexible data sharing Enterprise-wide application – database administrator (DBA) • Stronger standards ...


... Java programming languages but also contains syntax that is peculiar to PHP. The latest version is PHP 5 which has an object-oriented model that allows objects to be passed by reference. This is the main difference between PHP 5 and the other versions where objects are passed by value.[4] ...
Mandatory Access Control and Role
Mandatory Access Control and Role

... database site labeled with higher security level. 5. Read down: A user with a higher level can read any information of the lower level from the same security level database site, yet they cannot make changes on this information. 6. Dominance: in our system, we implement dominance concept from the mi ...
DB2 Overview
DB2 Overview

...  For ...
Slide 1
Slide 1

... The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The ...
Configuring Metadata Stores
Configuring Metadata Stores

Client/Server and Middleware
Client/Server and Middleware

... wait for a response. If connection is lost, client must re-establish the connection and send request again. High scalability but low recovery, largely replaced by type 2 2. Synchronous RPC – distributed program using this may call services available on different computers – makes it possible to achi ...
< 1 ... 194 195 196 197 198 199 200 201 202 ... 459 >

Concurrency control

In information technology and computer science, especially in the fields of computer programming, operating systems, multiprocessors, and databases, concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.Computer systems, both software and hardware, consist of modules, or components. Each component is designed to operate correctly, i.e., to obey or to meet certain consistency rules. When components that operate concurrently interact by messaging or by sharing accessed data (in memory or storage), a certain component's consistency may be violated by another component. The general area of concurrency control provides rules, methods, design methodologies, and theories to maintain the consistency of components operating concurrently while interacting, and thus the consistency and correctness of the whole system. Introducing concurrency control into a system means applying operation constraints which typically result in some performance reduction. Operation consistency and correctness should be achieved with as good as possible efficiency, without reducing performance below reasonable levels. Concurrency control can require significant additional complexity and overhead in a concurrent algorithm compared to the simpler sequential algorithm.For example, a failure in concurrency control can result in data corruption from torn read or write operations.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report