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Demonstrating the Effects of Processing on Structure and Properties via the Annealing and Strain Hardening of Copper: Part Two- Mechanical Properties
No full textThis module will demonstrate "the structure-properties-processing relationship fundamental to materials science." The objective of the lesson is to "explain the effects of strain hardening and annealing on engineering materials and how the resulting mechanical properties may be significantly modified." This is part two of a two-part module; part one may be found here.The module would be best for college undergraduate students and should take around two to three hours to complete. The document is available to download in PDF file format
National Renewable Energy Laboratory
No full textThe National Renewable Energy Laboratory (NREL) is based in Golden, Colorado and is the "only national laboratory solely dedicated to advancing renewable energy and energy efficiency technologies from concept to commercial application." Another aspect of NREL's work involves the creation of high-quality educational resources for those persons who would like to learn more about renewable energy. Visitors will note that the site contains five primary areas, including Renewable Energy Basics, Using Renewable Energy, and Student Resources. Under Renewable Energy Basics, visitors will find succinct summaries of renewable energy sources that include solar, wind, and biomass power. Moving on, the Using Renewable Energy area includes information designed to help different types of users, including electricity providers, farmers, homeowners, and small business owners. Finally, the Student Resources area includes materials for high school and college students, such as fact sheets on biofuels and comprehensive sites on biomass usage
Lessons in Electric Circuits Vol III Semiconductors
No full textA free series of textbooks on the subjects of electricity and electronics. These books DC, AC, Semiconductors, Electronics, Digital, Reference, and Experiments, and all related files are published under the terms and conditions of the Design Science License. Chapter 1: AMPLIFIERS AND ACTIVE DEVICES Chapter 2: SOLID-STATE DEVICE THEORY Chapter 3: DIODES AND RECTIFIERS Chapter 4: BIPOLAR JUNCTION TRANSISTORS Chapter 5: JUNCTION FIELD-EFFECT TRANSISTORS Chapter 6: INSULATED-GATE FIELD-EFFECT TRANSISTORS Chapter 7: THYRISTORS Chapter 8: OPERATIONAL AMPLIFIERS Chapter 9: PRACTICAL ANALOG SEMICONDUCTOR CIRCUITS Chapter 10: ACTIVE FILTERS Chapter 11: DC MOTOR DRIVES Chapter 12: INVERTERS AND AC MOTOR DRIVES Chapter 13: ELECTRON TUBES Appendix 1: ABOUT THIS BOO
Near Earth Object Program
No full textThis site, created by the National Aeronautics and Space Administration, contains relevant information on Near Earth Objects (NEO). The site includes current tables with tracking data for potentially hazardous asteroids and their approaches towards earth, detailed information of recent NEO discoveries, and images of the objects themselves. Six key resources are prominently featured on the main page of this resource. Other links such as image, news and related resources are also provided. Most of these resources require a Java installation
Modeling Instruction Program
No full textCreated by David Hestenes of Arizona State University's modeling instruction and software development research, this site is an approach to reform of curriculum design and teaching methodology has been guided by a Modeling Theory of Physics Instruction. In addition, the site also provides modeling instructions for biology, chemistry and physical science. External links are provided under the heading "Opportunities for Professional Growth." These allow teachers the opportunity for explore workshops and other programs which can help enhance their teaching/curriculum
Population Change and Distribution: 1990 to 2000
No full textThis report, part of a series that analyzes population and housing data collected from the census of 2000, highlights population size and distribution changes between 1990 and 2000 in regions, states, counties, and large cities. Data, maps, and discussion are used to examine the size of the population increase, which states and regions experienced the largest growth, where the largest proportion of the population lives, and how the population changed in the ten largest American cities
Locate Your Watershed
No full textThis interactive map allows users to find their local watersheds and access a variety of information on conditions in them. Search hierarchy is based on region (the largest), subregion, accounting unit, and hydrologic unit (the smallest). The information includes streamflow data (real-time and archived), water quality data, water use data, groundwater sites by county, and links to regional studies and other publications arranged by region, subregion, and accounting unit
Illustrations of Interconnectedness in Ecosystems
No full textThis module introduces the idea of interconnectedness among ecosystem components and describes a number of scenarios that illustrate the concept. Interconnectedness is a fundamental ecological concept, a common theme in natural resource/environmental science programs and a foundational component of ecosystem-based management of natural resources. Two introductory activities require students to diagram ecosystem interconnections. Brief descriptions of 13 additional scenarios are provided, along with references to and descriptions of supporting video, print and web-based resources
Field Analytic Technologies: Immunoassay and Enzymatic Assays
No full textThis site features a discussion of immunoassays in the context of testing for environmental contaminants, including a fairly detailed explanation of how immunoassays are conducted and advantages and limitations in the analysis of environmental problems. There is also a discussion of analytical concerns - interferences, limits of detection, accuracy and precision, calibrating immunoassays, etc
Research Randomizer
No full textCreated by authors Mike Lestik, Scott Plous and Geoffrey Urbaniak of the Social Psychology Network, this "Research Randomizer" is a free service offered to "assist researchers and students who want an easy way to perform random sampling or assign participants to experimental conditions." Since its creation in 1997, this resource has been used 7.5 million times for a various amount of different tests. The authors offer a simple survey to fill in to begin the exam. This is a great resource for those interested in statistical testing or simply need assistant performing a specific test