03 abril 2015

Sun and Moon Halo



Two pictures captured on April 1 are combined in this creative day and night composite. Separated in time by about 10 hours the images otherwise match, looking along the coast at Östersund Sweden. The relative times were chosen to show the Sun and a nearly full Moon at the same place in the cold, early springtime sky. In the night scene Jupiter also shines above the waterfront lights, while Sun and Moon are both surrounded by a beautiful circular ice halo. The Sun and Moon halos really do align, each with an angular radius of 22 degrees. That radius is a constant, not determined by the brightness of Sun or Moon but only by the hexagonal geometry of atmospheric ice crystals and the reflection and refraction of light. Of course tomorrow, April 4, will find the Sun and Moon on opposite sides of planet Earth for a total lunar eclipse.



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April 3rd 1968: King’s last speechOn this day in 1968, the...



Martin Luther King Jr. (1929 - 1968)





King at his hotel shortly before his assassination





The MLK memorial in Washington DC



April 3rd 1968: King’s last speech


On this day in 1968, the American civil rights leader Martin Luther King Jr. made his last speech, the day before his assassination. The Baptist minister from Georgia first came to national attention for his leadership of the Montgomery Bus Boycott in 1955, which attempted to desegregate buses in the city. This event is considered by many the beginning of the Civil Rights Movement, which saw a national effort to end discrimination against African-Americans. King was one of many leaders, but became the face of the movement for his non-violent tactics and powerful oratory. In 1963, during the March on Washington, King delivered the crowning speech of the struggle - the ‘I have a dream’ speech. Beyond his role in combating racial inequality, King also focused on tackling poverty and advocating peace, especially during the Vietnam War. In April 1968, King visited Memphis in solidarity with striking sanitation workers. It was at the Mason Temple in this city that he delivered his ‘I’ve Been to the Mountaintop’ speech, widely considered one of the finest of his long career. The very next day, King was assassinated at his Memphis hotel by James Earl Ray. His final speech was remarkably prophetic, as he appeared to acknowledge he would not live long, and invoked the Biblical story of Moses, who led the Israelites out of slavery in Egypt. Moses died before he could enter the Promised Land, though God allowed him to view it from atop Mount Nebo before he died. Though King didn’t know it, he too died before he saw his dream come to fruition, and since his death comparisons between the civil rights leader and Biblical prophet have abounded.



Like anybody, I would like to live a long life. Longevity has its place. But I’m not concerned about that now. I just want to do God’s will. And He’s allowed me to go up to the mountain. And I’ve looked over. And I’ve seen the promised land. I may not get there with you. But I want you to know tonight, that we, as a people, will get to the promised land.”



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posters showing the horrors womens’ voting would bring,...

























posters showing the horrors womens’ voting would bring, pre-1921


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Why Put Robots In Your Factory?

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(Photo Credit: Brandon Cirillo)


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Experimental Wing Tests Electric Propulsion Technologies



Leading Edge Asynchronous Propeller Technology (LEAPTech) project researchers at NASA's Armstrong Flight Research Center are performing ground testing of a 31-foot-span, carbon composite wing section with 18 electric motors. The LEAPTech project will test the premise that tighter propulsion-airframe integration, made possible with electric power, will deliver improved efficiency and safety, as well as environmental and economic benefits. The experimental wing, called the Hybrid-Electric Integrated Systems Testbed (HEIST), is mounted on a specially modified truck. Testing on the mobile ground rig assembly will provide valuable data and risk reduction applicable to future flight research. Instead of being installed in a wind tunnel, the HEIST wing section will remain attached to load cells on a supporting truss while the vehicle is driven at speeds up to 70 miles per hour across a dry lakebed at Edwards Air Force Base. LEAPTech to Demonstrate Electric Propulsion Technologies Image Credit: Joby Aviation



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The British traditionally swam the breaststroke, while Native Americans swam the front crawl. When...

The British traditionally swam the breaststroke, while Native Americans swam the front crawl. When two Native Americans won an 1844 swimming competition in England, newspapers criticized their barbaric, “un-European” (but faster) form. The British still would not teach the front crawl for decades.


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Annual Report to the Nation on the Status of Cancer,...













Annual Report to the Nation on the Status of Cancer, 1975-2011


The Annual Report to the Nation on the Status of Cancer, 1975-2011, is an update of rates for new cases, deaths and trends for the most common cancers in the United States. All rates in the report are per 100,000 people in the U.S. population.


Experts from the North American Association of Central Cancer Registries (NAACCR), the American Cancer Society (ACS), the Centers for Disease Control and Prevention (CDC), and the National Cancer Institute (NCI) jointly issue the Annual Report to the Nation.


The latest report was published online March 30, 2015, in the Journal of the National Cancer Institute. Major findings from the report include the following:


Key Points



  • The report highlights the period from 1975-2011 to provide the best perspective on long-term trends in cancer incidence (new cases) and mortality (death) rates for all races combined.

  • Researchers found continued declining mortality rates for men, women, and children.

  • The incidence rate of thyroid cancer is increasing among both men and women, as well as the mortality rate for liver cancer.

  • The incidence rate of oral/oropharyngeal cancers is increasing among white men despite a decline in oral cancers that are more closely associated with tobacco use.

  • With a focus on breast cancer, the researchers used comprehensive national data on hormone receptor (HR) and HER2 status to determine the incidence of the four major molecular subtypes of breast cancer by age, race/ethnicity, poverty level, and several other factors.

  • Moreover, researchers found unique racial/ethnic group-specific patterns by age, poverty level, geography, and by specific breast tumor characteristics.

  • Read the full report .


(From National Cancer Institute)


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