Michael Cohen, Donald Trump, Pakistan: Your Wednesday Briefing
Here’s what you need to know.
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Thursday, February 28, 2019
China Shifts, and Detroit’s Big Bet Goes Sour
Chrysler, Ford and General Motors saw a booming Chinese driving culture and cheap labor. Now the market is slowing, competition is rising and the Trump administration wants limits.
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Brexit, Kim Jong-un, Michael Cohen: Your Wednesday Briefing
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Live Briefing: Trump-Kim Summit: Leaders Have Dinner in Vietnam
President Trump and Kim Jong-un, the North Korean leader, dined on Wednesday before discussions start in earnest in Hanoi.
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What a Korean War Peace Deal Could Mean, Decades After the Fighting Stopped
The Trump-Kim meeting in Vietnam has raised expectations of an accord between North and South Korea that has been considered for decades.
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Scientists Luck Upon a New Way To Make a Rainbow
sciencehabit shares a report from Science Magazine: Chemists have stumbled across a new way to separate reflected light into the colors of the rainbow -- a phenomenon known as iridescence. The surprisingly simple technique, which is something of a hybrid of previously known ones, could have applications both scientific and aesthetic. In iridescence, an object reflects different colors at different angles, separating white light into its constituent colors. Now, [researchers] at Pennsylvania State University in State College report producing iridescence in a new way. They happened across the effect in early 2017, when they cooked up micron-size spherical droplets containing two types of oil in which the lighter oil formed a lentil-shaped upper layer the researchers hoped to use as a lens. But surprisingly, when illuminated from above, the edges of the lentils glowed with a color that depended on their size and the angle at which they were viewed, the team reports today in Nature. Clarity came only with the computer simulations performed [the researchers]. Their analysis showed the iridescence emerges through a new mechanism that blends certain elements of the previously known ones. [...] Engineers already use thin-films and refractive particles to create iridescence in video displays, paints, and decorative wall coverings. With its simplicity and adjustability, the new effect could open ways to color the world. The effect can be explained in a much simpler system: "water droplets that condense and hang from the underside of the lid of a petri dish. Light waves entering near one edge of a droplet can bounce two or more times off the dome of the droplet before emerging near the other edge -- much as light reflects off the back of a raindrop in a rainbow. However, the light waves entering at slightly different distances from the center of the droplet can bounce different numbers of times. And waves bouncing different numbers of times can interfere and reinforce each other, as in diffraction or thin-film interference. As a result, different colors emerge at different angles, which can be controlled by changing the size of the droplet."
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Police In Canada Are Tracking People's 'Negative' Behavior In a 'Risk' Database
An anonymous reader quotes a report from Motherboard: Police, social services, and health workers in Canada are using shared databases to track the behavior of vulnerable people -- including minors and people experiencing homelessness -- with little oversight and often without consent. Documents obtained by Motherboard from Ontario's Ministry of Community Safety and Correctional Services (MCSCS) through an access to information request show that at least two provinces -- Ontario and Saskatchewan -- maintain a "Risk-driven Tracking Database" that is used to amass highly sensitive information about people's lives. Information in the database includes whether a person uses drugs, has been the victim of an assault, or lives in a "negative neighborhood." The Risk-driven Tracking Database (RTD) is part of a collaborative approach to policing called the Hub model that partners cops, school staff, social workers, health care workers, and the provincial government. Information about people believed to be "at risk" of becoming criminals or victims of harm is shared between civilian agencies and police and is added to the database when a person is being evaluated for a rapid intervention intended to lower their risk levels. Interventions can range from a door knock and a chat to forced hospitalization or arrest. Data from the RTD is analyzed to identify trends -- for example, a spike in drug use in a particular area -- with the goal of producing planning data to deploy resources effectively, and create "community profiles" that could accelerate interventions under the Hub model, according to a 2015 Public Safety Canada report. Saskatchewan and Ontario officials say the data in the database is "de-identified" by removing details such as poeple's names and birthdates, but experts Motherboard spoke to say that scrubbing data so it may never be used to identify an individual is difficult if not impossible.
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