PLoS Medicine is an international, multidisciplinary medical journal that publishes outstanding human studies that substantially enhance the understanding of human health and disease. PLoS Medicine aims to promote translation of basic research into clinical investigation, and of clinical evidence into practice. PLoS Medicine encourages papers that cross disciplines.
"I Would Like to See Them Outlawed": Citizens Complain to Congress about Sweepstakes Promotions
In the 1960s, lottery-like contests designed to publicize products through sweepstakes competitions spread rapidly. In the 19th century, every state banned lotteries--defined as competitions in which chances to win prizes were sold÷to protect citizens. In 1868, Congress prohibited the distribution of lottery materials through the mail. The mid-20th century sweepstakes, however, did not require contestants to purchase tickets or products to win prizes and were thus considered legal. In 1966, the
Solidarity, Sustainability, and Non-Violence
The Pelican Web & E-Journal There is overwhelming evidence that violence is the main obstacle to sustainable development. It is also well known that there is an intrinsic link between patriarchy and violence. Therefore, mitigating violence requires overcoming the patriarchal mindset in both secular and religious institutions. The mission of "The Pelican Web" is to collect and analyze knowledge on patriarchy-induced obstacles to sustainable development, and to publish the free subscription, ope
WWII: The War Economy - US History: from Civil War to Present
What does it mean to be an American? Far from being a fixed concept, over the past 150 years American identity has been constructed and reconstructed through the conflicts, interchanges, and negotiations between different ethnic, cultural, and religious groups. In this course, we will pay particular attention to two major transformations in American identity: the shift from a conception of citizenship grounded on race to one grounded on shared democratic ideals; and the development of the United
Vinegar and baking soda
Vinegar is an acid. An acid has a pH less than 7. When baking soda is added to vinegar, bubbles are produced and gas is released. Fizzing, bubbling, and change in smell are all evidence of a chemical reaction. The amount of gas produced using baking soda as an indicator tells you the relative concentration ...
Worm Experiment Week 1
At week 1, evidence of earthworm decomposition is not present.
Worm Experiment Week 4
At week 4, evidence of earthworm decomposition is beginning to show. The earthworm is eating the dead material and releasing smaller forms of matter into the container.
Examine human impact on the land surface of the Earth as well as evidence of natural processes in this key that emphasizes hands-on interpretation of USGS imagery. This quiz introduces students to the concepts of Remote Sensing, and challenges them to think about the human and physical processes at work that are changing the Earth's surface.
Ranking the Rocks: Lesson
This lesson develops the real-world connections and relationships between the rock properties found in Lesson 5 and the important engineering properties for designing and building caverns (or tunnels, mines, building foundations, etc.). The student teams will use importance factors called "desirability points" to mathematically determine the overall best rocks to build caverns within.
Ranking the Rocks: Activity
This activity develops the real-world connections and relationships between the rock properties found in Lesson 5 and the important engineering properties for designing and building caverns (or tunnels, mines, building foundations, etc.). The student teams will use importance factors called "desirability points" to mathematically determine the overall best rocks to build caverns within.
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
Mystery of the Chicxulub Crater: Animation Shows Liquid Impact
This news article from Space.com reviews older articles on evidence for the impact hypothesis of dinosaur extinction at the end of the Cretaceous. The article contains hyperlinks to older, reviewed articles, digital images of the hypothesized impact and a link where the reader can post their opinion ...
Teaching About Evolution and the Nature of Science
This website offers a free, online version of the National Academy Press' summary of the scientific evidence for evolution. The book has a substantial bibliography and a number of K-12 activities. Users can read the book online, download a PDF version for a minimal price or order the print version.
Mountain building in Scotland
Some of Britain’s most dramatic scenery is to be found in the Scottish Highlands. The sight of mighty Ben Nevis, the desolate plateau of the Cairngorms, or the imposing landscapes of Glen Coe can unleash the call of the wild in all of us. Although these landforms were largely carved by glacial activity that ended some 10,000 years ago, the rocks themselves tell of a much older history. The Highlands are merely eroded stumps of a much higher range of ancient mountains. This unit is an account o
Snow Falls on Mars
September 30, 2008- NASA's Phoenix Mars Lander has detected snow falling from martian clouds, and its soil testing shows further evidence of the planet's watery past, scientist say. Run time 01:46.
The motivational effect of ICT on pupils
The motivational effect of ICT on pupils reports upon the recent research relating to motivational effects upon learning, and the related teaching strategies. A sample of 17 schools and PRUs from across England were surveyed. The review, commissioned by the DfES, includes diverse aspects of ICT including pupils’ engagement, independence and behaviour. It covers issues relating to gender, out-of-school activities and teacher expectations. It provides a wealth of information to support trainee t
Managing Change in Small Primary Schools
This is the summary of a fuller research report on change management in small primary schools throughout Scotland. The research was funded by the Scottish Office Education and Industry Department (SOEID) and conducted in 1996/97 for the Scottish Council for Research in Education (SCRE). Evidence is drawn from two phases: a postal survey sent to all headteachers of small Scottish primary schools (those with less than 120 pupils) and subsequent case studies of 18 of these headteachers. The purpose
This module covers the history of attitudes, beliefs, and theories about the etiology of schizophrenia. While the illness was long thought to be environmentally caused, this module emphasizes the scientific evidence in support of its organic origins. Dr. Arnold Scheibel of UCLA Medical Center describes cellular pathology in the hippocampus and speculates on the possible
Learning As Synaptic Change
This module presents researchers investigating the structural changes involved in learning. Research conducted at the Pasteur Institute in Paris shows that the learning process involves the formation of new brain connections and the elimination of others. Other researchers dispel the myth of brain loss in aging, present evidence of changes at the cellular level, and revi
Frontal Lobes and Behavior: The Story of Phineas Gage
This module relates the story of Phineas Gage, whose name appears in virtually every general psychology textbook. After a heavy metal rod was blown through his temporal lobe, Phineas experienced dramatic mental change. The study of the trauma and its physiological effects provided the first documented evidence of how brain injury can affect human behavior.