Ask Dr. Global Change
This site offers a searchable collection of answers to questions about global warming, ozone depletion, greenhouse gases, and other issues related to climate change. Students can also submit questions of their own and explore related links.
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
Body With Thruster Model
The Body with Thruster Model shows the motion of a disk with an attached rocket engine. You can drag the engine to change its distance from the center of the disk and you can adjust the thrust of the rocket engine using sliders. The mass of the rocket and its connecting rod are assumed to be negligible. The trajectory of this single-body model is intuitively challenging and difficult to visualize.
Radioactive Decay Distribution Model
The EJS Radioactive Decay Distribution Model simulates the decay of a radioactive sample using discrete random events. It displays the distribution of the number of events (radioactive decays) in a fixed time interval. If each event is assumed to occur independently and spontaneously with a constant probability, the resulting distribution if the Poisson distribution. You can change the initial number of nuclei, the decay constant and the time interval for the event distribution.
Radioactive Decay Model
The EJS Radioactive Decay Model simulates the decay of a radioactive sample using discrete random events. It displays the number of radioactive nuclei as a function of time. You can change the initial number of nuclei and the decay constant as well as changing the plot to a semi-log plot.
Balls in a Box Model
The Balls in a Box model shows a system of particles is very sensitive to its initial conditions. In general, an isolated system of many particles that is prepared in a nonrandom configuration will change in time so as to approach its most random configuration where it is in equilibrium. What happens if we choose the initial conditions in a very special way? The default initial condition corresponds to eight stationary particles perfectly aligned on the x-axis. Two particles approach from the l
Virtual Maths - Numbers, 2D Triangle simulation tool
Diagram and formulas for are and volume of 2D shapes
Employment, labour markets, and development
Launch Lecture of the UNCTAD Trade and Development Report 2010. As nations struggle with what they fear will be a "jobless recovery" from the global recession, the report studies how employment can be raised in developing countries and how the participation of the majority of the population in economic growth can be warranted. The report recommends a fundamental change in the assignment of economic policies to allow for growth, inclusion, high employment and monetary stability at the same time.
HIV and AIDS Prevention Education
This is a collection of resource packages suggesting how education systems can change their analysis and conduct in relation to HIV and AIDS. The site also contains manuals and booklets offering basic facts and information needed for the acquisition of knowledge and development of attitudes, values, skills and practices (KAVSP) related to the prevention and control of HIV/AIDS.
Climate Change Kids Site
Explore this site to learn about the science and impacts of climate change. The site also provides games that help students, their parents and their teachers learn about both the science of climate change and what actions they can take to reduce greenhouse gas emissions.
The Soviet-Finnish Peace
Recognition of the Soviet Union;Mannerheim Line; Finland; Soviet Union;Leaflet explaining the rationale behind the Soviet Union's invasion of Finland.
General NOAA Operational Modeling Environment)
GNOME (General NOAA Operational Modeling Environment) is the oil spill trajectory model used by OR&R Emergency Response Division (ERD) responders during an oil spill. ERD trajectory modelers use GNOME in Diagnostic Mode to set up custom scenarios quickly. In Standard Mode, anyone can use GNOME (with a Location File) to: - predict how wind, currents, and other processes might move and spread oil spilled on the water. - learn how predicted oil trajectories are affected by inexactness ("uncertai
Bering Sea Climate
The Bering Sea Climate website contains time series data that measures climate and ecosystem status in the Bering Sea. The site presents data, metadata, and graphics by allowing the user to select categories and then click a button for the desired function. Data can be displayed as a list, a time series plot, or in terms of recent trends, relevance, and correlation. Measured parameters include weather, oceanographic and climate data, sea ice data, and fisheries and other biological data. The sit
NASA CONNECT Virtual Earth: Using Concept Maps to Solve Problems
In NASA CONNECT Virtual Earth, students will be introduced to Earth system science. They will learn what a system is and how to apply the concept of systems to learn more about how the Earth functions. Students will understand the only way to really comprehend the workings of our planet is to look at the Earth as a whole system. They will also focus on Earth science applications of national priority to expand and accelerate the use of knowledge, science, and technologies resulting from the Earth
When I started teaching this subject I found three kinds of texts. There were applications books that avoid proofs and cover the linear algebra only as needed for their applications. There were advanced books that assume that students can understand their elegant proofs and know how to answer the homework questions having seen only one or two examples. And, there were books that spend a good part of the semester multiplying matrices and computing determinants and then suddenly change level to wo
Little Power Houses – Animal Cells
All the animals on earth, including us, are made from thousands of
millions of cells. Each one of these cells has a specific function and a
collection of cells form tissue, which in turn forms an organ. Although
different in function, every animal cell has a similar structure.
Cells are enveloped by a thin membrane that protects the protoplasm
and organelles inside it. The most important of the organelles is the
nucleus, which is like the cell’s brain an
Changes in Southern Politics
The political landscape in the South underwent significant change during the twentieth century. Political and social change in Southern states was directly connected to some of the landmark events of American history, particularly the Civil Rights Movement. An understanding of the role of politics in the South is essential to comprehension of the history and culture of the region. The oral histories in this site illuminate changes in Southern politics from the end of the Civil War up to the pre
Changing Communities: Past vs. Future
This lesson plan introduces students to changes that have occurred in western North Carolina, through two hundred years of national and regional development. Students will learn about the geographical, political, and technological issues that have influenced change in mountain communities using oral histories by Madison County residents. They will learn about the history of road building in the North Carolina mountains, and the relatively recent decision to connect two halves of interstate highw
Where Have We Been? Tracing Family through a Timeline of National History
This lesson plan introduces students to examples of how wars and technological developments have impacted the movement of people throughout United States and world history. Students will learn about the effects of political, technological, and geographical issues on the population of one North Carolina community. Listening to oral histories by North Carolinians, students will hear first hand accounts about the impact of wars and road building on Madison County. Using a timeline depicting events
AP Calculus BC I
This course is divided into two semesters and is designed to acquaint you with calculus principles such as derivatives, integrals, limits, approximation, applications and modeling, and sequences and series. During this course you will gain experience in the use of calculus methods and learn how calculus methods may be applied to practical applications. Upon completion of this course you will: * be able to work with functions represented in a variety of ways: graphical, numerical, analytical, or