Tutorial Week 7 - Class and Entity-Relationship Diagrams 1 Class Diagrams and Entity Relationship Diagrams (ERD) Class diagrams and ERDs both model the structure of a system. Class diagrams represent the dynamic aspects of a system: both the structural and behavioural features. ERDs‚ depicting only structural features provide a static view of the system. 2 Class Diagrams 2.1 Elements of a class diagram: 2.1.1 class A class is a general concept (represented as a square box). A class defines
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Cause and Effect Everyone has to make decisions on daily bases. Why? Because life is full of choices to make. Whether it is an important decision that requires careful thought and consideration or a quick decision‚ like what is for lunch. Wouldn ’t it be nice to have the knowledge about a tool or technique to help you make those important decisions? No‚ "what ’s for lunch"‚ is not an important decision. However‚ changing jobs‚ buying a car‚ planning a wedding‚ or running a business requires critical
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more Americans are becoming worried about the use of Genetically Modified Organisms in their food. The controversy of the use of GMOs in food can be understood through examining how they work‚ their disadvantages‚ and their advantages. Farming has transformed so much over the years. Six thousand years ago‚ farmers had holding pens and growing fields (Shmaefsky 1). In today’s world‚ farming is not that simple. Since farming has transformed‚ larger operations are taking away a lot of the mom and pop
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Purpose: To find how pH and temperature levels affect the enzyme Background: Enzymes are a type of protein vital to sustaining life‚ it works with vitamins and minerals as a biological catalyst‚ which lowers the activation energy for a reaction to occur. Each individual type of enzyme does a specific job‚ and they do not die‚ they are reused. For example‚ catalase is an enzyme found in almost all living cells that will break down hydrogen peroxide and turn it into water and oxygen. The
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How Organism Learn: Classical and Operant Conditioning There are two main explanations of how organisms learn. The first explanation is known as classical conditioning. The second explanation is known as operant conditioning. These two types of learning are exhibited in our everyday lives through our home‚ school‚ and school. Classical conditioning was discovered by Iran Petrovich Pavlov. He was originally a physiologist whose main focus was the digestive system (Gazzaniga 230).
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ACTIVITY DIAGRAMS IN UML Activity Diagrams WHAT IS AN ACTIVITY DIAGRAM? Activity diagrams consist of activities‚ states and transitions between activities and states. Activity diagrams combine ideas from event diagrams‚ Petri nets and state modeling techniques An activity diagram is a special case of state charts in which most or all states are activity states and most or all transitions are triggered by the completion of activities in the source state. What is an Activity Diagram? The
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The Ethics of Genetically Modified Organisms Genetic engineering has become a seriously debated concern in society over the last three centuries. As scientists become closer to finding a way to accomplish it with new technology and less risks‚ the increasing concerns grow. People all over the world are looking for a way to eliminate disease‚ expand lifetimes‚ and preserve resources. When looking at the genetic engineering of many important factors in society such as religion‚ laws‚ and societal
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Genetically Modified Organisms The Human genome is known to be the sequencing of about twenty thousand five hundred thousand genes that make up our human DNA‚ or the building block that tells our cells what to do. The government created project that is named the Human Genome Project started in 1990’s‚ and is trying to pick apart at the three billion chemical base pairs in a DNA strand. The full set of the information present in the form of the genes in living organism then forms its genome
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Lesson 1 Key Questions 1. The development of MRI imaging technology is one useful spinoff of basic research into the structure of the atom. Research‚ however‚ is expensive. Many people argue that the high cost of research outweighs its potential benefits. Provide one argument for‚ and one argument against increasing current funding for atomic structure research. Use specific examples from this lesson in your answer to support
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Set Operations and Venn Diagrams " Please respond to the following: QUES: Create a story problem that demonstrates how a Venn diagram could be used to illustrate combined operation with sets. ANS: Use a Venn diagram to illustrate the following scenario: There are 40 people in a drum corp. Of the 40 people‚ 20 play the snare drum; 10 play the trumpet; 5 plays the cymbals. There are 5 people that play both the snare drum and cymbals; and 3 play all three instruments. How many people don’t play
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