Sunday, July 19, 2020

Has Hollywood finally decided to fight “Reel Life Racism”

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Syed Ahmed Uzair

Article Title

Has Hollywood finally decided to fight “Reel Life Racism”

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Global Views 360

Publication Date

July 19, 2020

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Al Jolson in Warner Bros. publicity photo for the film The Jazz Singer (1927)

Al Jolson in Warner Bros. publicity photo for the film The Jazz Singer (1927) | Source: Wikimedia

Back in the 1960s, when the Civil Rights Movement was slowly gaining momentum in the United States, broadcasting services were employed to gather support for the movement. Images of various kinds of atrocities and violence being rendered to nonviolent Black demonstrators were broadcasted into American houses to raise awareness about the movement.

However, the response of Hollywood so far can be explained in a single word- tragic! Hollywood as a major media and content producer has massively shaped the American culture. However it has not much to show as a positive influence on race issues.

A classic 1940’s musical movie, Holiday Inn had the famous song in which White stars performed in blackface. In a 1980s hit, “Indiana Jones and the Temple of Doom” the Indians are depicted as barbaric and uncivilised. The list of such racial stereotypes is huge to be reproduced here.

Legendary Hollywood actor John Wayne made highly offensive comments in a playboy interview. His exact words are, “I believe in white supremacy until the Blacks are educated to a point of responsibility. I don't believe in giving authority and positions of leadership and judgment to irresponsible people.” He further goes on to make a series of comments, that ideally should not be coming from someone with so much influence in Hollywood.

Many legendary actors and industry icons too have struggled due to racism in Hollywood. Bruce Lee is a fine example of a person who fought against racism in the industry and refused to be cast in many roles that portrayed Chinese people in a negative light. He ultimately moved back to Hong Kong, partly due to the lack of appropriate roles. Actress Lucy Liu has also spoken about how she was too naïve to understand back in the early days as to why her friend would get multiple auditions every day, while she managed two or three in a month.

In 2015, there was a massive uproar regarding the Oscar winners after the academy awarded all 20 nominations to white actors. It quickly gained momentum with the hashtag #OscarsSoWhite becoming a global trend. Before #OscarsSoWhite, no one would have bothered to notice that 86% of top films predominantly featured white actors.

As per a Washington Post survey, film directors who ranked as the most influential decision-makers at Hollywood were predominantly whites. Hollywood might stress for newer reforms against racism on the big screen but that is not the reality at all. To put things into perspective, the Hollywood academy has never revealed information about the diversity of its members involved in the branches of the academy, such as writers, directors, etc.

The response of Hollywood movers and shakers was always akin to a tokenism, a call to push for producing more content involving black writers, producers, and actors.

George Floyd’s death was just the trigger it needed to burst out in the open the pent up anger over the centuries of discrimination, oppression, and systematic injustice meted out to black people. The way black people are portrayed in reel life directly impacts society’s attitude towards them in real life.

People started demanding that Hollywood production companies and studios should involve the people from the community in the decision-making process when the movie plot is based considerably on the members of those communities. They have also demanded that older movies depicting racially insensitive narratives should be taken out of circulation.

Disney, one of the most reputed names in Hollywood, chose to remove the movie “Song of the South” from US distribution, when the criticism for the movie grew, even though it remains available for those who know where to look. They have also announced the plan to revamp the famous Splash Mountain ride at Disneyland and Disney World to include the character of Princess Tiana- Disney’s first African American princess from the movie The Princess and the Frog.

UK TV broadcaster Sky has added a disclaimer to approximately a dozen films stating, “This film has outdated attitudes, language and cultural depictions which may cause offence today."

HBO max recently pulled the iconic film, Gone with the wind because of its controversial depiction of black stereotypes. It returned with a four and a half minute introductory video by black scholar Jaqueline Stewart for a better understanding about racism.

Ever since the resurfacing of the playboy interview of John Wayne, students and alumni at USC have been protesting against Wayne’s exhibit at the campus. However, USC has finally decided to remove the exhibit.

All these reforms are a direct result of the audience being more and more aware of racism and prejudice. However, it is Hollywood’s turn to step up and push for bigger reforms. While it would be a challenging and bold endeavor, Hollywood’s global influence makes it imperative for the industry to undergo much-needed reforms.

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July 19, 2021 11:59 AM

Detecting The Ultra-High Energy Cosmic Rays With Smartphones

Smartphones have become the most commonplace objects in our daily lives. The unimaginable power that we hold in our hands is unrealized by most of us and, more importantly, untapped. Its creativity often gets misused but one can only hope that it’s fascinating abilities would be utilized. For example, did you know that the millions of phones around the globe can be connected to form a particle detector? The following article covers the CRAYFIS (Cosmic RAYs Found in Smartphones) phone-based application developed by the physicists from the University of California—Daniel Whiteson, Michael Mulhearn, and their team. CRAYFIS aims to take advantage of the large network of smartphones around the world and detect the cosmic or gamma rays bursts which enter the Earth’s atmosphere almost constantly.

What Are Cosmic Rays?

Cosmic rays are high velocity subatomic particles bombarding the Earth’s upper atmosphere continuously. Cosmic ray bursts have the highest energy compared to all forms of electro-magnetic radiation. When we say ultra-high energy particles (energy more than 10<sup>18</sup> eV), we mean two million times more energetic than the ones that can be produced by the particle colliders on Earth.  These rays are thought to be more powerful than typical supernovae and can release trillions of times more energy than the Sun. They are also highly unpredictable as they can enter Earth’s atmosphere from any direction and the bursts can last for any period of time ranging from a few thousand seconds to several minutes.

Despite many theoretical hypotheses, the sources of these ultra-high energy cosmic rays are still a mystery to us even after many decades of their discovery. These rays were initially discovered in the 1960’s by the U.S. military when they were doing background checks for gamma rays after nuclear weapon testing. Cosmologists suggest that these bursts could be the result of super massive stars collapsing - leading to hypernova; or can be retraced to collisions of black holes with other black holes or neutron stars.

How Do We Detect Them?

When the high-energy particles collide with the Earth’s atmosphere, the air and the gas molecules cause them to break apart and create massive showers of relatively low-energy particles. Aurora borealis i.e., the Northern and the Southern lights are the lights that are emitted when these cosmic rays interact with the Earth’s magnetic field. Currently, these particles are hitting the Earth at a rate of about one per square meter per second. The showers get scattered to a radius of one or two kilometers consisting mostly of high-energy photons, electrons, positrons and muons. But the fact that these particles can hit the Earth anytime and anywhere is where the problem arises. Since the Earth has a massive area, it is not possible to place a detector everywhere and catch them at the exact moment.

Energetic charged particles known as cosmic rays hit our atmosphere, where they collide with air molecules to produce a shower of secondary particle | Source: CERN

Detecting such a shower requires a very big telescope, which logically means a network of individual particle detectors distributed over a mile or two-wide radius and connected to each other. The Pierre Auger Observatory in South America is the only such arrangement where 1,600 particle detectors have been scattered on 3,000 square kilometers of land. But the construction cost of the same was about $100 million. Yet, only a few cosmic ray particles could be detected using this arrangement. How do we spread this network around the Earth?

In addition to being cost-effective, such a setup must also be feasible. The Earth’s surface cannot possibly be dotted with particle detectors which cost huge fortunes. This is where smartphones come into the picture.

Detecting The Particles Using Smartphones

Smartphones are the most appropriate devices required to solve the problem. They have planet wide coverage, are affordable by most people and are being actively used by more than 1.5 billion users around the planet. Individually, these devices are low and inefficient; but a considerably dense network of such devices can give us a chance to detect cosmic ray showers belonging to the highest energy range.

Previous research has shown that smartphones have the capability of detecting ionizing radiation. The camera is the most sensitive part of the smartphone and is just the device required to meet our expectations. A CMOS (Complementary Metal Oxide Semiconductor) device is present in the camera- in which silicon photodiode pixels produce electron-hole pairs when struck by visible photons (when photons are detected by the CMOS device, it leaves traces of weakly activated pixels). The incoming rays are also laced with other noises and interference from the surroundings.  Although these devices are made to detect visible light, they still have the capability of detecting higher-energy photons and also low-ionizing particles such as the muons.

A screenshot from the app which shows the exposure time, the events- the number of particles recorded and other properties

To avoid normal light, the CRAYFIS application is to be run during nighttime with the camera facing down. As the phone processor runs the application it collects data from its surroundings using a camera as its detector element. The megapixel images (i.e., the incoming particles) are scanned at a speed of 5 to 15 frames per second, depending on the frame-processing speed of the device. Scientists expect that signals from the cosmic rays would occur rarely, i.e., around one in 500 frames. Also, there is the job of removing background data. An algorithm was created to tune the incoming particle shower by setting a threshold frequency at around 0.1 frames per second. Frames containing pixels above the threshold are stored and passed to the second stage which examines the stored frames, saving only the pixels above a second, lower threshold.

The CRAYFIS app is designed to run when the phone is not being used and when it is connected to a power source. The actual performance would be widely affected by the geometry of the smartphone’s camera and the conditions in which the data is being collected. Further, once the application is installed and is in the operating mode, no participation is required from the user, which is required to achieve wide-scale participation. When a Wifi connection is available the collected data would be uploaded to the central server so that it could be interpreted.

There is much complicated math used to trace back the information collected from the application. The most important parameters for the app are the local density of incoming particles, the detection area of the phone and the particle identification efficiency. These parameters are used to find the mean number of candidates (photons or muons) being detected. Further, the probability that a phone will detect no candidates or the probability that a phone will detect one or more candidates is given by Poisson distribution. The density of the shower is directly proportional to the incident particle energy with a distribution in x and y sensitive to the direction in which the particle came from. An Unbinned Likelihood (it is the probability of obtaining a certain data- in this case the distribution of the cosmic rays including their energy and direction, the obtained data is arranged into bins which are very, very small) analysis is used to determine the incident particle energy and direction. To eliminate background interference, a benchmark requirement has been set that at least 5 phones must detect and register a hit to be considered as a candidate.

It is impossible to express just how mind-blowing this innovation is. As the days pass, Science and Technology around us keep on surprising us and challenge us to rack our brains for more and more unique ways to deal with complex problems. The CRAYFIS app is simply beautiful and it would be a dream-come-true to the scientists if the project works out and we are able to detect these high energy, super intimidating cosmic rays with smartphones from our backyard.

Further Reading

The paper by Daniel Whiteson and team can be found here.

An exciting book “We Have No Idea” by Daniel Whiteson and cartoonist Jorge Cham can be found here.

The CRAYFIS app can be found here.

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