ER stands for entity relationship that helps in organizing and storing the data in a database. The stored data is in the form of different entities that defines the relationship between each entity. Peter Chen developed the concept of ER diagrams in 1976. Chen’s innovative work started a new arena of research and practice known as conceptual modeling. The entity relationship model serves as the foundation of various system analysis, repository system and computer-aided software engineering tools. Data models are easy to understand and it is a means of visualizing how information produced by a system is related to each other. An entity relationship diagram looks like a flowchart as it contains specialized symbols and its meaning that makes it more unique. Objects such as entities and relationship sets can be represented with the help of an ER diagram.
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An entity relationship diagram is also called an entity-relationship model that reflects the graphical representation of entities and their relationships with each other. Below are the various relationships between the entities.
Though ER model looks as simple diagrammatic representation, but it is intricate in nature as it involves a clear understanding of data flow. Moreover, an ER diagram also shows a graphical representation of the design that makes difficult for the students to understand its complex structure. Furthermore, the newly enrolled students want to run away from this topic due to several technical terminologies associated with it. If a student is all confused with the concept, it would create a drastic problem in designing the ER diagram as the materials available on the internet are also of no help in such a case. Also, ER diagram is specially designed for an advanced level design that too confuses some students and it results in their poor performance. Nowadays, academics these days are also demanding and challenging that wastes most of the students crucial time. Amongst these situations dealing with the topics like ER diagram and related homework is tricky and problematic. To cope up with these problematic situations, EssayCorp provides the best professional guidance on database assignment writing for students on all the topics related to it. With the team of experts, students can get the expert help and can get rid of all their complications regarding this topic.
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You are required to design a simple CMOS circuit consisting of a two-input NOR gate. You are required to show the layout (plan view) of the circuit, after calculating the aspect ratio (W?L) of the transistors. The Layout of the circuit includes the VDD and ground lines.