Database model

The rules of Logic specify the meaning of mathematical statements, it is the basis of all mathematical reasoning (Rosen, 2012). Its application in the area of computer science is very vast that even the computer itself defends on it, True or False, 1 or 0, and the presence or absence of bit. The study of Logic will increase your knowledge in formulating logically statements for the reason that program statements and expressions is built from repeated application of logical operators. This module…

Segmentation has a great importance in digital image analysis. It is also one of the most difficult low-level image analysis tasks. Many image processing application apply segmentation as primary step. Image segmentation serve a variety of applications, such as handwritten character identification, medical image analysis as breast cancer detection, in infrared image, automatic target recognition, radar image application, and in pattern recognition application...etc. The quality of the…

Non parametric tests It is a hypothesis test which does not need population distribution. For instance there are numerous hypothesis tests which depend upon assumptions that population must be normally distributed along with the parameters. Main advantages of non- parametric tests are that they do not rely on assumptions, so they can be easily used where population is non-normal. One thing to be kept in mind, that these tests may have few assumptions related to the data. They might not be…

D1 - Discuss how potential errors in the design and construction of a database can be avoided. Accidental deletion of fields When a database is being used you might find it easy to accidently delete data which could mean a lot of stress if it is something which is very valuable. One main way to avoid this would be to make sure that back-ups are made of the data, so whatever the matter the data will not be completely lost. Back-ups can be stored on anything like a memory stick or an external…

Nelson Mandela once said, “Education is the most powerful weapon which you can use to change the world.” However, in Woody Allen’s, “The Rejection,” the writer satirizes the ideals of the education system that acknowledges only the intelligent students. This is seen in the character of Boris through his exaggerated reaction towards the failure of his son. During the time of Woody Allen, he believed that education was only for the smart and intelligent people. Woody Allen satirizes the education…

Concurrency loss due to IO path critical sections (IPCS) Time lost in waiting queue (WT) to enter a critical section affects an application concurrency (AC), and impedes the application performance from scaling (AC ∝ 1 / WT) if a workload is bursty and highly parallelized. It is apparent that the wait time to enter a critical section is a function of the CS’s size (CSS) and the number of waiting threads (NWT) i.e. WT ∝ CSS * NWT. Furthermore, the work done (IO completed) is proportional to the…

We’ve used a lot of devices and storages so far in our life, but one thing that might be weird to people is the RAID. RAID stand for redundant array of independent disks and is a place for people to store their information. It is stored on CDs, instead of the normal flash drives and hard drives. RAIDS are different from the normal CDs, because they have to divide the data and spread the blocks into several megabytes for RAID to work. This is to make RAID efficient and fast. There are lots of…

Not Only SQL (NOSQL) In this paper I will use comparisons to help distinguish what is NOSQL. We will talk about NOSQL vs SQL. Document, Graph, or Key-value and wide column Models of NOSQL. We will touch on Schema and end with a condensed comparison of SQL and NOSQL. In short, a brief overview of not only NOSQL but also its opposing and conjoining systems, and their pro’s and con’s. To really understand these comparisons, you need to have an Idea of what JavaScript and JSON are in addition to…

[pic][pic] [pic]2 RELATIONAL MODEL: CONCEPTS, CONSTRAINTS, LANGUAGES, DESIGN, AND PROGRAMMING [pic][pic][pic][pic][pic][pic][pic][pic][pic][pic] [pic]5 The Relational Data Model and Relational Database Constraints This chapter opens Part II of the book on relational databases. The relational model was first introduced by Ted Codd of IBM Research in 1970 in a classic research publication "System R4 Relational." (Codd 1970), and attracted immediate attention due to its simplicity,…

Ownership When developing and implementing a relational database, defining the information and users of the system enable definition of the business rules defining the components of the database management system. An example can be evaluated through the use of a CRUD – create, retrieve, update and delete – matrix as it relates to student information and the individuals or departments related to the school that may require access. The resulting model will be used to interpret business rules and…