Lennard-Jones Potential Model
The EJS Lennard-Jones Potential model shows the dynamics of a particle of mass m within this potential. You can drag particle to change its position and you can drag the energy-line to change its total energy. The Lennard-Jones potential function is a reasonably accurate model of interactions between noble gas atoms. The binding energy epsilon is the depth of the potential well and minimum molecular separation are set equal to unity. This simulation uses uses a natural system of units the m
Strange Harmonic Oscillator Model
The EJS Strange Harmonic Oscillator model displays the motion of two masses connected by a massless rigid rod and the masses may move without friction along two perpendicular rails in a horizontal table. The energy of the oscillator system can be changed via a slider.
Learning Guide: Unit 3 - Care for vulnerable learners
In Unit 3 we place the spotlight on learners and investigate what we mean by vulnerable learners, what challenges they face, and why the school can be such a powerful and positive influence in their lives. We hope that deeper insight into the plight of vulnerable learners will motivate you and your management team to put in place simple information gathering system that enables you to pinpoint accurately who is vulnerable in your school. Dependable management information will enable you to make
Course Outline for Advanced Certificate: Education School Management And Leadership (Word)
This document is the course outline for the Advanced Certificate: Education (School Management And Leadership) programme. The ACE programme is aimed at empowering school leaders to lead and manage schools effectively in a time of great change, challenge and opportunity. It is targeted at serving School Management Team members who aspire to principalship. The programme seeks to provide structured learning opportunities that promote quality education in South African schools through the developmen
Medicine Games: Immune System Defender
Play a game and find out about a Nobel Prize awarded discovery or work! Ilya Mechnikov, one of the pioneers of immune system research, inserted a thorn into a larva and noticed strange cells gathering around the thorn. The cells were eating any foreign substances entering the ruptured skin. He called ...
Medicine Games: Split Brain Experiment
Play a game and find out about a Nobel Prize awarded discovery or work! The brain is made up of two halves, the hemispheres. These hemispheres are united to one another through a system consisting of millions of nerve fibers. Therefore, each hemisphere is continually informed about what is happening ...
The Amana Colonies
looks at the historic utopian society established in the 1850s along the Iowa River by German-speaking settlers from a religious group known as the Community of True Inspiration. The group, which originated in Himbach, Germany, in 1714, created a communal system of living of seven villages, each with ...
The Emerald Necklace: Boston's Green Connection
recounts the creation of a series of parks in Boston in the 1880s. At that time, Boston was crammed with buildings and people. It was overcrowded, noisy, and dirty. City officials, concerned about the health and well-being of Bostonians, hired Frederick Law Olmsted, who had designed Central Park in New York, to create a park system that wove together a series of small parks?gardens, waterways, meadows, tree museums, and others?into what became known as Boston's Emerald Necklace.
Tally of the 1824 Electoral College Vote
This site focuses on the complex system of election rules by examining the vote tally of the 1824 Presidential election, in which the winning candidate, John Quincy Adams, received fewer popular votes than the runner-up, Andrew Jackson.
Digital Earth Workbench: Magnetospheric Pressure
The Digital Earth Workbench is an interactive application that runs on a SGI Onyx Infinite Reality system and is controlled by an Immersive Workbench, tracked stereo glasses, and a tracked wand. The application allows an unprecedented freedom to roam georeferenced datasets at multiple resolutions and ...
Mapping the Watery Hills and Dales
This classroom activity explains and demonstrates how the Global Positioning System satellites work to provide precise location information to positions on the ground, as well as to other satellites whose job is to map the surface of Earth. The activity is specifically tied to NASA's Jason-1 and Topex/Poseidon ...
Exploring Meteorites Mysteries
This program allows educators to borrow meteorite samples and provides a teacher's guide with activities and a slide set to support lessons on the earliest history of the solar system and meteorite impacts on Earth. These educational materials may be borrowed as a package or the guide and/or slides ...
Discovery of the Solar System
This page is part of NASA's website "From Stargazers to Starships". It discusses the evolution of scientific thought concerning the nature of the solar system, beginning with the earth-centered solar system advocated by Hipparchus and Ptolemy. Ptolemy's idea that the sun and planets moved around the ...
Event-Based Science: Remote-Sensing Activities
Event-Based Science (EBS): Remote-Sensing Activities enable middle school students to use remotely-sensed data- as they tackle the real-world problems and tasks found in existing EBS modules. Remotely-sensed data are employed as an integral part of both the presentation of Earth system science concepts, ...
This poster shows images of comets Hale-Bopp and Shoemaker-Levy 9. The accompanying text describes possible source regions for comets in our solar system, the behavior of comets as they approach the Sun, their possible role in the evolution of Earth, and significant dates in the study of comets.
Basics of Space Flight
This training module was designed to help the user identify and grasp basic concepts associated with space travel and deep space missions. Separate sections deal with topics such as the physical environment of space (solar system, gravity, orbital mechanics), flight projects (mission concepts, system requirements, design, onboard systems and instruments), and flight operations (launch, cruise, encounter). Links to related topics are embedded in the text.
US National Assessment of the Potential Consequences of Climate Variability and Change
The United States Global Change Research Program (USGCRP) was created as a high-priority national research program to: address key uncertainties about changes in the Earth's global environmental system, both natural and human-induced; monitor, understand, and predict global change; and provide a sound ...
Triangular Plots in Metamorphic Petrology
These lecture notes discuss the use of three component systems in metamorphic petrology. Common triangular plots used in metamorphic rocks are presented with annotated ternary diagrams. The presentation includes four criteria for reducing the number of components in a system to a workable number. There ...
Mid-Ocean Ridge Basalts
This PowerPoint presentation is part of the Whitman College petrology course. This 37-slide presentation starts by presenting a generalized map of the earth's rift system. The composition of mid-ocean ridge basalt is introduced in the context of major-element chemistry, petrography, trace elements, spreading rate, and isotope chemistry. Melt generation in terms of mantle and lithospheric structure is portrayed in a number of schematic diagrams. This resource is part of the Teaching Petrology col
"Principles of Digital Communication I, Fall 2009"
" The course serves as an introduction to the theory and practice behind many of today's communications systems. 6.450 forms the first of a two-course sequence on digital communication. The second class, 6.451 Principles of Digital Communication II, is offered in the spring. Topics covered include: digital communications at the block diagram level, data compression, Lempel-Ziv algorithm, scalar and vector quantization, sampling and aliasing, the Nyquist criterion, PAM and QAM modulation, signal