Civil Rights
Movements, leaders, victories and the continuing fight for equality.
Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
Black towns, communities, institutions and places where history happened.
Moments that changed communities, movements, institutions and the nation.
Wilmington, North Carolina once had a thriving Black middle class and an elected interracial government. In 1898 white supremacists used violence to overthrow that government, kill Black residents and drive many others from the city.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
| Part of a series on |
| Physics |
|---|
This timeline lists significant discoveries in physics and the laws of nature, including experimental discoveries, theoretical proposals that were confirmed experimentally, and theories that have significantly influenced current thinking in modern physics. Such discoveries are often a multi-step, multi-person process. Multiple discovery sometimes occurs when multiple research groups discover the same phenomenon at about the same time, and scientific priority is often disputed. The listings below include some of the most significant people and ideas by date of publication or experiment.
Hero's Principle states that light undergoing a reflection from a plane surface will follow the path of least distance
Four PTA collaborations have delivered evidence for a stochastic background of nanohertz gravitational waves
IceCube Neutrino Observatory, this array has now allowed astronomers to image the Milky Way — not using light, but particles
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
The concept of multiple discovery (also known as simultaneous invention) is the hypothesis that most scientific discoveries and inventions are made independently and more or less simultaneously by multiple scientists and inventors. The concept of multiple discovery opposes a traditional view—the "heroic theory" of invention and discovery. Multiple discovery is analogous to convergent evolution in biological evolution.
Multiple Sclerosis Discovery Forum (MSDF) is a non-profit online resource created to speed progress toward a cure for multiple sclerosis (MS) and other demyelinating diseases by enabling faster sharing of information and free discussion among MS researchers in academia, industry, and the clinic. Launched in April 2012, MSDF deploys science journalism as a primary tool in fostering communication and collaboration among MS researchers from all corners of the scientific enterprise. The site combines news and features with technical resources, such as a weekly editor-curated index of MS-related papers from PubMed and a database with the latest scientific and regulatory information about drugs being marketed or in the pipeline for treatment of MS. Other resources include interactive data visualizations, meetings and events, and discussion forums. MSDF is modeled after online scientific community Alzheimer Research Forum (AlzForum). Since 1996, AlzForum has become a location for information and interaction for investigators working on age-related neurodegeneration. More recently, similar independent neutral Web-based neurology disease forums have followed, including Schizophrenia Research Forum and Pain Research Forum. As with its sister forums, all content on MSDF is provided free of charge to the research community, and editorial independence from sponsors and donors is strictly maintained. MSDF articles have unique digital object identifiers (DOI) to provide stable linking over time and to facilitate discussion and altmetrics tracking of scientific articles in social media forums, s. MSDF articles are indexed by Google News. MSDF covers the plausible but unproven questions of whether the dozen new anti-inflammatory therapies can be deployed more effectively against disease progression, as well as the upsurge in research to understand the pathological mechanisms and treatments for progressive MS. Related demyelinating conditions include neuromyelitis optica (NMO), transverse myelitis, acute disseminated encephalomyelitis, and optic neuritis. Their misdiagnosis as MS can lead to inappropriate and even harmful therapeutic choices, such as was discovered with NMO, now clearly understand to be a different disease. MSDF is a joint activity of Accelerated Cure Project for Multiple Sclerosis (ACP) and the MassGeneral Institute for Neurodegenerative Disease (MIND).
This timeline lists significant discoveries in physics and the laws of nature, including experimental discoveries, theoretical proposals that were confirmed experimentally, and theories that have significantly influenced current thinking in modern physics. Such discoveries are often a multi-step, multi-person process. Multiple discovery sometimes occurs when multiple research groups discover the same phenomenon at about the same time, and scientific priority is often disputed. The listings below include some of the most significant people and ideas by date of publication or experiment.
In statistics, the false discovery rate (FDR) is a method of conceptualizing the rate of type I errors in null hypothesis testing when conducting multiple comparisons. FDR-controlling procedures are designed to control the FDR, which is the expected proportion of "discoveries" (rejected null hypotheses) that are false (incorrect rejections of the null). Equivalently, the FDR is the expected ratio of the number of false positive classifications (false discoveries) to the total number of positive classifications (rejections of the null). The total number of rejections of the null include both the number of false positives (FP) and true positives (TP). Simply put, FDR = FP / (FP + TP). FDR-controlling procedures provide less stringent control of Type I errors compared to family-wise error rate (FWER) controlling procedures (such as the Bonferroni correction), which control the probability of at least one Type I error. Thus, FDR-controlling procedures have greater power, at the cost of increased numbers of Type I errors.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →The Greenwood District.