Samuel Okeke

Website Developer | Certified Microsoft Innovative Educator (MIE)| Certified Google Digital Marketing Expert| A Lecturer| An Author.

Biology

THE CELL

THE CELL.

Introduction

The cell is the basic unit of an organism
All living organisms are made up of cells
Some organisms are made up of one cell and others are said to be multicellular
Other organisms are made of many cells and are said to be multicellular
Cells are too little to see with the naked eye
They can only be seen with the aid of a microscope

The microscope

The microscope is used to magnify objects

Data Processing

COMPUTER GRAPHICS PACKAGE

A graphic is a digital representation of drawing, chart or photographs. It can also be called a picture or image which contains no motion or animation. Graphic package is an application that can be used to create and manipulate images on a computer. Computer graphics are used in many applications including science, engineering, advertising, multimedia production etc. They are related to all activities where static and animated pictures and images are created, processed, manipulated using specialized hardware and computer software. Data in form of images are easy to understand and interpret.

Data Processing

MICROSOFT POWERPOINT

What is Microsoft Power Point?
Microsoft PowerPoint is a presentation program that is incorporated in Microsoft Office suite package. It offers word processing, outlining drawing, graphing and presentation management tools

Starting a presentation with Microsoft PowerPoint

There are two ways of starting Microsoft PowerPoint

Click on start button, choose All Programs and click PowerPoint
Double click on the icon of PowerPoint document and PowerPoint opens with the document already loaded.

Data Processing

INTERNET (PRACTICAL ON INTERNET)

E-mail is a method of sending digital messages from one computer to another. E-mail is short for Electronic Mail. E-mail is received instantly by the users email provider and mails stay in the mailbox until accessed by the users. Mail boxes have storage limit (limited amount of emails which they can hold and once full you cannot receive any more email until you delete older messages).

To use email, you must have an email address. Email address can be web based (like yahoo mail or Gmail or hosted internally like outlook express on the school computer).

Creating a yahoo mail account

Steps to yahoo account

Open the browser and go to login.yahoo.com/account/create or edit.yahoo.com/registration. A page will show up with registration form at the center of the page.
Type your “first name” in the first field box
Type your ‘last name” in the second field box

Data Processing

FILE ORGANISATION

File organisation refers to the way in which data is stored in a file and the methods by which it can be accessed. Database is stored as a collection of files. Each file is a sequence of records. A record is a sequence of fields. Data is usually stored in the form of records.

Records usually describe entities and their attributes e.g. an employee record represents an employee entity and each field value in the record specifies some attributes of that employee such as Name, Birth_date, salary etc. Organizing a file depends on what kind of file it happens to be.

Data Processing

NORMAL FORM

Normalization of Database

Database Normalization is a technique of organizing the data in the database. Normalization is a systematic approach of decomposing tables to eliminate data redundancy and undesirable characteristics like insertion, updates and deletion Anomalies.

It is a multi-step process that puts data into tabular form by removing duplicated data from the relation tables.

Normalization is used for mainly two purposes.

Eliminating redundant (useless) data
Ensuring data dependencies make sense i.e. data is logically stored.

Data Processing

DATA MODELLING

Data modeling is a process used to define and analyze data requirements needed to support the processes within the scope of corresponding information system in an organization.

Creating simple data mode

Microsoft Access offers one table, queries, forms, reports, macros and modules and these will be created before creating a data model.

Table: All data are stored in table i.e. MS. Access stores data in tables and can exist as a simple file that allows basic data as a single file that allows basic data storage and retrieval.
Query: This is used to add, change, delete or update data in database. It enables one to find or operate on the data in the tables.
Forms: These are screens used for displaying data. It is a screen that displays the output of data.
Reports: This is used for outputting of data. It is a screen that displays the output of data.
Pages: This is used to enter or display data online.