The Secret World of Sharks and Rays
Woldwide, there are more than 370 species of sharks, which vary greatly in size, shape, preferred habitat, and prey. This film from the PBS Nature series explores their worlds and those of their close cousins, the rays. (49:36)
Semi-Riemann Geometry and General Relativity
This book represents course notes for a one semester course at the undergraduate level giving an introduction to Riemannian geometry and its principal physical application, Einstein’s theory of general relativity. The background assumed is a good grounding in linear algebra and in advanced calculus, preferably in the language of differential forms. This book covers the following topics: The principal curvatures; rules of calculus; Levi-Civita Connections; bundle of frames; connections on prin
Introduction to Computer Science I
Computer Science 50: Introduction to Computer Science I is a first course in computer science at Harvard College for concentrators and non-concentrators alike. More than just teach you how to program, this course teaches you how to think more methodically and how to solve problems more effectively. As such, its lessons are applicable well beyond the boundaries of computer science itself. That the course does teach you how to program, though, is perhaps its most empowering return. With this skill
Cosmic Survey: What are Your Ideas About the Universe?
Lesson plans and activity composed of a three-part questionnaire that launches students on discussions about where objects in space are located, and when they were formed- an introduction to the concepts of structure and evolution of the universe. This astronomical image-sorting activity lays the groundwork for discussions about the size, scale and history of the universe. Use it as a front-end assessment of how students understand the universe. Recommended for teachers of Grades 6-12 and inform
California Fires MODIS imagery and TOMS Aerosols from October 2003
This animation sequences through the MODIS imagery of the devastating Californian fires from October 23, 2003 through October 29, 2003. Then the animation resets to October 23, 2003 and zooms out to see the TOMS aerosol sequence. It clearly shows that the California fires had an impact on air quality as far east as Maine.
China Dust Storm Pollutes Air in the Eastern United States in April 2001 (Flatmap)
A large dust storm develops over China on April 6 and 7, 2001. This animation shows the dust moving over China, Russia, Japan, the Pacific Ocean, and Canada, settling over the United States.
Transient Aerosol Features: North Atlantic Ocean from March to April 1988
Aerosol index over the North Atlantic from March 20, 1988 through April 9, 1988 as measured by the Nimbus-7 Total Ozone Mapping Spectrometer (TOMS)
Aerosols from Nimbus 7 TOMS: Transatlantic Dust Event in 1983
Saharan dust storms raise dust that is carried in the upper atmosphere across the Atlantic Ocean. That dust can land as far west as the Caribbean and the Americas. This dust can carry potentially hazardous bacteria and fungi.
Transatlantic Dust from North Africa (WMS)
Desert storms in northern Africa raise dust that is carried in the upper atmosphere across the Atlantic Ocean. The dust, which may carry potentially hazardous bacteria and fungi, can land as far west as the Caribbean and the Americas.
Continental Effects of 2004 Alaskan Fires (WMS)
Wildfires started by lightning burned more than 80,000 acres in Alaska in June 2004. The effects of these fires can be seen across North America with the Total Ozone Mapping Spectrometer (TOMS) instrument on the Earth Probe spacecraft. TOMS detects the presence of UV-absorbing tropospheric aerosols across the globe.
Aerosol Index over the Atlantic Ocean: July 1, 1988 to September 29, 1988
Aerosol index measurements indicating dust blowing westwards from Africa across the Atlantic Ocean during the period July 1, 1988 to September 29, 1988. as measured by Earth Probe TOMS
Sea Surface Temperature Anomalies during El Nino-La Nina Event of 1997-1998 (WMS)
The El Nino-La Nina event in 1997-1999 was particularly intense, but was also very well observed by satellites and buoys. A strong upwelling of unusually warm water was observed in the Pacific Ocean during the El Nino phase, followed by unusually cold water in the La Nina phase. The Advanced Very High Resolution Radiometer (AVHRR) instrument on the US National Oceanic and Atmospheric Administrations NOAA-14 spacecraft observed the changes in sea surface temperature shown here.
Infrared Astronomy: More Than Your Eyes Can See
This lithograph uses images of the well-known constellation of Orion to illustrate how a common astronomical object appears in both visible light and in the infrared. The back of the lithograph tells the history of infrared light and explains the benefits of infrared astronomy.
Elementary GLOBE: Measure Up
Students will use various objects in the classroom to experiment with nonstandard measurement. They will make estimates and test them out. Then, working in pairs or small groups, students will use a ruler or a measuring tape to become familiar with how to use these tools for standard linear measurement. The purpose of this activity is to practice making standard and non-standard measurement and to learn the purpose of making linear measurements and how to apply them to scientific investigations.
Elementary GLOBE: All Year Long
Each student will keep a science journal during each of the four seasons. Students will record observations of the general outdoor environment they visit and then will make observations of one specific item from the habitat in each season. At the end of the school year, students will make comparisons of their seasonal drawings and share the results with the class. The purpose of the activity is to introduce students to the concept of using a science journal to record information, to have student
Elementary GLOBE: Cloudscape
A learning activity for the "Do You Know That Clouds Have Names?" book in the Elementary GLOBE series. Using information from the book and their observations, students construct a sky scene with trees and buildings as reference points on the ground and cloud types ordered by altitude in the sky. Students will describe clouds using their own vocabulary and will then correlate their descriptions with the standard classifications of cloud types used by the GLOBE Program. The purpose of the activity
Intro to Information Privacy, Spring 2009
With the explosion of information technology, almost everyone has multiple computer and mobile devices that interact on the Internet. In addition, on-line social networking and sharing has become common place; for instance, Facebook, MySpace, and others. Personal information flows freely among us, even when taking a coffee break on a wireless network. Understanding how to protect your privacy is everyone’s business. This course gives an introduction to computer and network security from the pe
Yet Another Calculus Text
I intend this book to be, firstly, a introduction to calculus based on the hyperreal number system. In other words, I will use infinitesimal and infinite numbers freely. Just as most beginning calculus books provide no logical justification for the real number system, I will provide none for the hyperreals. The reader interested in questions of foundations should consult books such as Abraham Robinson's Non-standard Analysis or Robert Goldblatt's Lectures on the Hyperreals. Secondly, I have aime
Risk Management for Enterprises and Individuals
This book is intended for the Risk Management and Insurance course where Risk Management is emphasized. When we think of large risks, we often think in terms of natural hazards such as hurricanes, earthquakes or tornadoes Perhaps man-made disasters come to mind such as the terrorist attacks in the U.S. on September 11, 2001. Typically we have overlooked financial crises, such as the credit crisis of 2008. However, these types of man-made disasters have the potential to devastate the global mark
This course provides an overview of various tools and techniques you can use for improving a process. A brief introduction on Capability Maturity Models, Six Sigma and Lean is included as part of this short course. Level: Intermediate - Some analytical knowledge and experience is helpful in fully understanding all of the concepts presented in this course. Recommended for 2.0 hours of CPE. Course Method: Inter-active self study with self-grading exam, and certificate of completion.