Ferns attached to a forest rock
Ferns have small, branched leaves, not to reduce gas exchange and water loss, but to increase the surface area for spore producing structures. This demonstrates that plants develop certain characteristics for very different reasons.
Radial Paper Chromatography Experiment
Experiment detailing radial paper chromatography using marker pen ink. Includes some relevant questions to ask students.
Primary Lateral Sclerosis - Station and Gait Exam - Gait Sub-exam - Patient 14
This video features a 54-year-old white male who presented for evaluation of progressive spastic paraparesis. He stated that symptoms first started in 1997 when "things were different with my legs" (i.e., leg weakness, imbalance, and speech problems). Symptoms started in his left foot, when he couldn't keep time to music. His feet started dragging and he also noticed problems with balance. In 1999, he started falling and sought medical attention. He was diagnosed with spastic paraparesis after
The elbow is connected together by a hinge joint. A hinge joint is a type of joint in the human body that only moves in one direction. The fingers and knees are also examples of hinge joints.
A tadpole is what hatches out of the egg that was laid by the adult frog. It lives in water and swims using its tail. It has gills and breathes underwater.
Forest food web Illustration
The lowest level of a food web includes producers, which are plants that make their own energy from the sun. Animals that eat these producers are called primary consumers, and consumers that eat other consumers are called secondary consumers. Decomposers break down dead plants and animals to release nutrients into the soil.
Military Transformation: The Japanese Army during the 1920s and 1930s
Dr. Edward Drea, Historian, Joint History Office. Following World War I, the Imperial Japanese Army sought to modernize its weapons and equipment and transform its force structure. For almost two decades, the best and the brightest staff officers assigned to the War Ministry and General Staff grappled with transformation issues as they sought to create a modern force capable of protecting Japanese interests in Northeast Asia. The fundamental question revolved around how to prepare Japan for a f
Moving images: Digitizing to the Future
This workshop covers the key concepts and technologies pertaining to moving image preservation and digitization in libraries, archives, and museums, including the typical elements in the preservation and digitization of moving images, how to assess their condition, and relevant technologies and best practices. An overview of the conservation research underway at the National Audio Visual Conservation Center will also be included. Speaker Biography: James Snyder is a digital media engineering, p
Build a LabVIEW subVI to demodulate a pulse-amplitude modulated (PAM) signal using a correlator.
2.3 Railways in Britain The railway age started with attempts to make a steam engine small enough to be fitted to a wagon for hauling coal at collieries, the wheels moving on a wooden or iron rail for guidance. Improvements to the drive mechanism led directly to the Locomotion designed by George Stephenson, and the opening of the first passenger and goods service for the 27 miles between Stockton and Darlington in County Durham. It was opened in 1825 and was quickly followed in 1830 by a line between Manchest
The railway age started with attempts to make a steam engine small enough to be fitted to a wagon for hauling coal at collieries, the wheels moving on a wooden or iron rail for guidance. Improvements to the drive mechanism led directly to the Locomotion designed by George Stephenson, and the opening of the first passenger and goods service for the 27 miles between Stockton and Darlington in County Durham. It was opened in 1825 and was quickly followed in 1830 by a line between Manchest
SI Units and calculating unit changes
To identify what SI units are, when they are used, and how to calculate unit changes.
This brief OLogy article helps kids understand that even Einstein made mistakes and didn't always finish everything he started. And, more importantly, that both his mistakes and his unfinished work also led to new ways of thinking. The article uses Einstein's Unified Field Theory as evidence of the value that can be found in imperfection.
This patient education program discusses age-related macular degeneration including the causes, risks, symptoms, diagnosis, treatment options, and management of the disease. It also reviews the anatomy of the eye and vision. This resource is a MedlinePlus Interactive Health Tutorial from the National Library of Medicine, designed and developed by the Patient Education Institute.
Crowdfunding 2 En savoir plus
Activity to learn more about Crowdfunding, and discuss the reasons to finance projects or not.
Air Pollution Trends and Impacts: Assessing Transportation in Context of Global Change
It is a complicated matter mapping the movement of pollution in the atmosphere, but Noelle Eckley Selin models not just the chemistry of the atmosphere as it absorbs emissions and responds to climate change, but its potential impact over time on human health and world economies. She takes a systems approach “to understanding
Science from a plane, and forecasting space storms
This week in the Planet Earth Podcast: how a specially-designed twin turboprop research plane is helping scientists in a huge range of subjects from archaeology to ecology, and why a violent space storm could spell trouble for communications systems across the world.
Pan-African Solidarity in the Central African Federation, 1953-1963 (African History and Politics Se
Zoe Grove, PhD student at Keele University, presents her research on the history of the Central African Federation, especially looking at the issues of cross-border migration and the movement of ideas.
Fiscal Policy in an Emerging Market Economy
Former Chilean Minister of Finance and Fellow of the Center for International Development at Harvard, Andres Velasco, delivered a lecture on the subject 'Fiscal policy in natural resource intensive countries: some theory and the experience of Chile.'