Assessing the Biological Weapons and Bioterrorism Threat
BIOSECURITY FOR A NEW ERA Lecture Series Biological weapons (BW) have been a significant national security preoccupation for nearly 15 years. The events of September 11 and the anthrax attacks that followed have magnified these concerns by orders of magnitude while shifting the context almost entirely to "bioterrorism." Over the past four years, the federal government has spent nearly $30 billion to counter the anticipated threat. Strangely, these responses took place in the absence of virtuall
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Calculate the Top Quark Mass
Students use conservation of momentum to calculate the mass of the top quark. This activity examines the fingerprint of a top/antitop production that took place in the D-Zero Detector at Fermilab on July 9, 1995. This activity will build on student understanding of vector addition and depends upon only a small amount of particle physics explanation.
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GEOLogic: The Big Five Mass Extinctions
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to match up the five largest mass extinction events with their relative dates, approximate duration, and severity (percentage of species that became extinct) based on clues given from various perspectives. This activity is appropriate for a high school science class or an introdu
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Continental Crust Mass Balance Calculation
This problem set is designed for a junior/senior level course and addresses several quantitative skills that are important in geochemistry and petrology. The exercise uses geochemical data for average quartz monzonite and diorite from the Mineral Mountains in Utah. The students do mass balance calculations and are asked to relate their calculations to continental crust formation. The activity was peer reviewed by participants at the 2004 Teaching Quantitative Skills in a Geoscience Context Works
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Acid Rain Destruction
Developed for third grade. Students will:; understand the damaging effects of acid rain on the environment.; understand the damaging effects of acid rain on plants.; pose a hypothesis and use the scientific method. Biology In Elementary Schools is a Saint Michael's College student project. The teaching ideas on this page have been found, refined, and developed by students in a college-level course on the teaching of biology at the elementary level. Unless otherwise noted, the lesson plans have
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Rayleigh-Taylor Instabilities in Supernovae Explosions: Oxygen Mass Fraction
The following calculation shows the development and evolution of Rayleigh-Taylor instabilities which develop behind the supernova blast wave on a time scale of a few hours. The initial model was chosen to provide a good representation for the progenitor star for Supernova 1987A. The calculation was performed using the Piecewise-Parabolic Method for hydrodynamics on a two-dimensional spherical grid with rotational symmetry about the vertical axis and equatorial symmetry about the horizontal axis.
Author(s): Bruce Fryxell,Dave Arnett,Ewald Muller,Pamela ONei

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Rayleigh-Taylor Instabilities in Supernovae Explosions: Hydrogen Mass Fraction
The following calculation shows the development and evolution of Rayleigh-Taylor instabilities which develop behind the supernova blast wave on a time scale of a few hours. The initial model was chosen to provide a good representation for the progenitor star for Supernova 1987A. The calculation was performed using the Piecewise-Parabolic Method for hydrodynamics on a two-dimensional spherical grid with rotational symmetry about the vertical axis and equatorial symmetry about the horizontal axis.
Author(s): Bruce Fryxell,Dave Arnett,Ewald Muller,Pamela ONei

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Rayleigh-Taylor Instabilities in Supernovae Explosions: Helium Mass Fraction
The following calculation shows the development and evolution of Rayleigh-Taylor instabilities which develop behind the supernova blast wave on a time scale of a few hours. The initial model was chosen to provide a good representation for the progenitor star for Supernova 1987A. The calculation was performed using the Piecewise-Parabolic Method for hydrodynamics on a two-dimensional spherical grid with rotational symmetry about the vertical axis and equatorial symmetry about the horizontal axis.
Author(s): Bruce Fryxell,Dave Arnett,Ewald Muller,Pamela ONei

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Building a 3-D Coronal Mass Ejection from 2-D Data
Using differences in polarization of light directly from the Sun vs. scattered from the CME electrons, it is possible to derive a distance of matter along the line-of-sight. This version is an enhanced version of animation ID 2950 (http://svs.gsfc.nasa.gov-vis-a000000-a002900-a002950-) with a color ...
Author(s): Tom Bridgman,Thomas Moran

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Can we eliminate nuclear weapons?
Twenty years after the fall of the Berlin Wall is the time finally right to achieve the elimination of nuclear weapons? Leading proponents of nuclear disarmament discuss why achieving Global Zero – a world without nuclear weapons – is both necessary and realistic.
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The Strategy of the Global Zero Campaign for Eliminating Nuclear Weapons
Bruce Blair, President of the World Security Institute and expert on U.S. and Russian security policies
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Mass Wasting/Landslide Animations
This site features Flash animations, MPEG simulations, and Real Media video clips that illustrate subsurface processes and consequences of mass wasting and landslide movement. Visualizations of slumps, flows, falls, and translational and rotational slides show bedrock failure and displacement and subsequent building damage and scarp, flowage zone, and toe formation. These resources portray a variety of modeled and real environments and are suitable for use in lectures, labs, or other teaching ac
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17.951 Nuclear Weapons in International Politics: Past, Present and Future (MIT)
This course will expose students to tools and methods of analysis for use in assessing the challenges and dangers associated with nuclear weapons in international politics. The first two weeks of the course will look at the technology and design of nuclear weapons and their means of production. The next five weeks will look at the role they played in the Cold War, the organizations that managed them, the technologies that were developed to deliver them, and the methods used to analyze nuclear fo
Author(s): Owen Cote,James Walsh

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

6.3 Chae's reaction to the destruction of the wood
Sunset Song was written in the early 1930s and is still one of the best-known and most-debated Scottish novels. In this unit, we discuss whether Sunset Song succeeds as critique of capitalism and whether it has value as a work of literature separate from its propagandistic ambitions.
Author(s): The Open University

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Licensed under a Creative Commons Attribution - NonCommercial-ShareAlike 2.0 Licence - see http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ - Original copyright The Open University

2.3 Measuring mass
Do fractions and decimals make you apprehensive about maths? Do you lack confidence in dealing with numbers? If so, then this unit is for you. The unit will explain the basics of working with positive and negative numbers and how to multiply and divide with fractions and decimals.
Author(s): The Open University

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2.5 Molecular mass distribution
This unit examines the use of polymers and demonstrates how the properties of polymers are controlled by their molecular structure. You will learn how this structure determines which polymer to use for a particular product. You will also explore the manufacturing techniques used and the how the use of polymerisation can be used to control the structure of polymers.
Author(s): The Open University

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Licensed under a Creative Commons Attribution - NonCommercial-ShareAlike 2.0 Licence - see http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ - Original copyright The Open University

6 Calculating body mass index
Diabetes is an increasing problem among both adults and children. This unit looks at the way diabetes is managed once it has been diagnosed in order to reduce the risk of further complications. You will look at the role of each member of the team involved in the diabetes annual review and look at the risk factors involved with certain diabetes complications.
Author(s): The Open University

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3.4 The mass production of death
This unit explores the Holocaust, as the destruction of European Jewry is commonly known. The mass killing represented by the Holocaust raises many questions concerning the development of European civilisation during the twentieth century. This unit, therefore, covers essential ground if you wish to understand this development.
Author(s): The Open University

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Genetic diversity and mass extinctions
To be able to understand the importance of the environment for our health, we need to know a little about the interdependence between environment and humankind. This unit will look at interactions between plants, animals and the physical and chemical environment, as well as considering ways in which humans have altered, and are altering this environment. These changes have health implications that are not always immediately obvious. Frequently, we initiate changes that are going to have their ef
Author(s): The Open University

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Momentum & Impulse; Center of Mass
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