This animation shows how velocity and position of an aircraft are resolved in a 3-D Cartesian coordinate system.
American Visionaries: Thomas Moran
features paintings and sketches of the noted American landscape painter. Moran's pencil and watercolor field sketches and paintings captured the grandeur and documented the extraordinary terrain and natural features of the Yellowstone region. His artwork was presented to members of Congress by park proponents and helped inspire Congress to establish the National Park System in 1916.
Allegheny Portage Railroad: Developing Transportation Technology
shows the innovative transportation system used in the 1820s-1840s to tow railroad cars up and down the steep slopes of the Allegheny Mountains.
Can Public Health Researchers and Agencies Reconcile the Push From Funding Bodies and the Pull From
Responding to growing impatience with the limited application of research findings to health practices and policies, both funding bodies and communities are demanding that research show greater sensitivity to communities’ perceptions, needs, and unique circumstances. One way to assure this is to employ participatory research—to engage communities at least in formulating research questions and interpreting and applying research findings and possibly also in selecting methods and analyzing dat
Al 88, Si 12 (wt%), eutectic alloy
This alloy is of the eutectic composition. From the melt a eutectic is formed between aluminium solid solution and virtually pure silicon. Slow solidification produces a very coarse microstructure. The eutectic comprises large plates of silicon in the aluminium matrix. This microstructure displays poor ductility due to the brittleness of large silicon plates. The microstructure is normally refined through either rapid solidification, which lets the silicon phase assume a fibrous form, or by a pr
Enhancing Physics Knowledge for Teaching – Maxwell’s Equations
In this session we’re going to look at how electricity and magnetism can be unified into a system of equations, named after James Clerk Maxwell, the Scottish physicist who first proposed them. Then we’ll see how this leads to an understanding of the nature of electromagnetic radiation.
Lessons from Hurricane Katrina: Can We Save California's Delta?
Lessons from Hurricane Katrina: Can we save California's Delta? Raymond B. Seed, Professor of GeoEngineering, Department of Civil & Environmental Engineering The catastrophic flooding of New Orleans during hurricane Katrina was the single most costly failure of an engineered system in history. It was also a social and cultural tragedy of unprecedented peacetime proportions for the United States. After the disaster, a team of leading experts from across the country examined the engineering and
The evolution of ICT-based learning environments: which perspectives for the school of the future?
This paper briefly outlines the evolution of ICT-based learning environments discussing some of the main aspects that have characterised such evolution (eg, technological evolution, changed cognitive and pedagogical frameworks, changed role assigned to ICT-based systems in education). The objective is to point out how the implementation of innovative learning environments, based on advanced technology, is the result of the strict interrelation between educational and cognitive theories, technolo
Fighting Back! (Lesson)
This lesson describes the major components and functions of the immune system and the role of engineers in keeping the body healthy (e.g., vaccinations and antibiotics, among other things). This lesson also discusses how an astronaut's immune system is suppressed during spaceflight due to stress and other environmental factors.
Out of Breath
This lesson goes over the parts of the human respiratory system and the gas exchange process that occurs in the lungs. It also covers changes in the respiratory system that occur during spaceflight, such as decreased lung capacity.
Just Passing Through (Lesson)
This lesson helps students explore the functions of the kidney and its place in the urinary system. Students learn how engineers design instruments to help people when kidneys are not functioning properly or when environmental conditions change, such as kidney function in space.
This lesson describes the function and components of the human nervous system. It helps students understand the purpose of our brain, spinal cord, nerves and the five senses. How the nervous system is affected during spaceflight is also discussed in this lesson.
In this activity, students are divided into a group of hormones and a group of receptors. The hormones have to find their matching receptors, and the pair, once matched, perform a given action. This activity helps students learn about the specificity of hormone-receptor interactions within the endocrine system.
In this activity, students use wood, wax paper and oil to investigate the importance of lubrication between materials and to understand the concept of friction. Using wax paper and oil placed between pieces of wood, the function of lubricants between materials is illustrated. Students extend their understanding of friction to bones and joints in the skeletal system and become aware of what engineers can do to help reduce friction in the human body as well as in machines.
Windmill of Your Mind: Distributed Energy Goes to School
Students research the feasibility of installing a wind-turbine distributed energy (DE) system for their school. They write a proposal (actually, the executive summary of a proposal) to the school principal based on their findings and recommendations. While this activity is geared towards fifth-grade and older students, and Internet research capabilities are required, some portions of this activity may be appropriate for younger students.
Chronos: a network for Earth system history
CHRONOS (Greek: time) aims to create a dynamic, interactive and time-calibrated framework for Earth history. CHRONOS's main objective is to develop a network of databases and visualization and analytical methodologies that broadly deal with chronostratigraphy - that is, with developing a better tool (the time scale) for understanding fundamental Earth processes through time. The CHRONOS platform will provide a new investigative environment for interdisciplinary Earth history research that includ
Alternative Strategies to the Use of Vertebrates in Undergraduate Physiology Labs
There are many reasons to seek alternatives to the use of vertebrates, including cost and concerns with use of vertebrates in undergraduate laboratories. This major workshop explores examples of alternatives, including: a) an exploration of thermoregulation without using animals at all, b) an investigation of actomyosin function and membrane excitation using giant alga, and c) using insects to investigate taste receptors and digestion. This workshop explores the importance of providing good back
Basic Spanish Vocabulary - Places
In this video you will see and hear the Spanish words for places that you might go. The video contains Spanish audio and shows English translations on the screen along with pictures that represent the words.
Computer enhanced education in undergraduate dietetics programs
Since computer technology was reported as underutilized on a previoussurvey, the objective of this study was to strengthen the role of technology forundergraduate programs in food and nutrition. The purpose was to determinewhether attendance at a workshop on computer applications would increase thevariety and frequency of use of computer applications and educational materials inundergraduate nutrition programs and would stimulate the development of computerenhanced education materials. A 89-item
Absolute coverage measurements of ultrathin alkali-metal films on reconstructed silicon
Metal/semiconductor interfaces, particularly those involving Si, are of great technological and scientific interest. In atomically abrupt interfaces, many properties are determined by interatomic interactions over a few layers, i.e., over ~1 nanometer. The initial stages of growth of an atomic layer related to structural and electronic properties are thus important to thin film behavior. Surface science studies on metal-semiconductor systems often lead to contradictory conclusions regarding bond