PPT-Chapter 9 – Software Evolution

Lecture 1 1 Chapter 9 Software evolution Topics covered Evolution processes Change processes for software systems Program evolution dynamics Understanding software evolution Software maintenance. Textco BioSoftware (formerly Textco, Inc.), has been developing high quality productivity tools for molecular biologists for over 25 years. Our unwavering commitment to customer service, and our focus on quality has generated a loyal customer following. Since 1984, we have provided solutions to scientists who are breaking new ground in genetic engineering, basic biology research, drug development, and biotechnology - at academic, government, and corporate institutions in more than 50 countries worldwide. Chapter 3: Computer Software. 2. Chapter Contents. Section A: Software Basics. Section B: Popular Applications. Section C: Buying Software. Section D: Installing Software and Upgrades. Section E: Security Software. Chapter 3: Computer Software. 2. Chapter Contents. Section A: Software Basics. Section B: Popular Applications. Section C: Buying Software. Section D: Installing Software and Upgrades. Section E: Security Software. 1. Topics covered. Evolution processes. Legacy systems. Software maintenance. 2. Software change. Software change is inevitable. New requirements emerge when the software is used;. The business environment changes;. Mechanisms of concerted evolution. Unequal cross-over. Gene conversion: non-reciprocal transfer of information between homologous sequences; the main mechanism invoked to explain concerted evolution. Chapter Overview Questions. How do scientists account for the development of life on earth?. What is biological evolution by natural selection, and how can it account for the current diversity of organisms on the earth?. Section A: Software Basics. Section B: Office Suites. Section C: Installing Software and Upgrades. Section D: Buying Software. Section E: Security Software. Chapter 3: Software. 2. FastPoll True/False Questions. . consists of programs designed to make users more productive and/or assist with personal tasks. Discovering Computers 2011: Living in a Digital World Chapter 3. 2. Page 142. Application Software. Discovering Computers 2011: Living in a Digital World Chapter 3. Lecture 1. 1. Chapter 8 Software testing. Topics covered. Development testing. Test-driven development. Release testing. User testing . 2. Chapter 8 Software testing. Program testing. Testing is intended to show that a program does what it is intended to do and to discover program defects before it is put into use. . Early scientists proposed ideas about evolution. . Evolution is the biological change process by which descendants come to differ from their ancestors.. A species is a group of organisms that can reproduce and have fertile offspring.. of . the Red . Queen. CfE. . Advanced Higher Biology. Unit . 2: . Organisms and Evolution. SQA mandatory key information. A change in the traits of one species acts as a selection pressure on the other species. . Chapter 17: Processes of Evolution. Early Beliefs. 19. th. century: discovered species shared many traits, but lived in different parts of the world. Problematic – species only looked similar on the outside, but inside were very different . . The process by which organism change over time. Based on science, not opinion.. Darwin. :. Evolution is descent with modification. Evolution. :. changes through time. Species accumulate difference. . The process by which organism change over time. Based on science, not opinion.. Darwin. :. Evolution is descent with modification. Evolution. :. changes through time. Species accumulate difference.