Tech: Links for 22nd October, 2019

Five articles on the evolution of mapping technologies:

  1. The evolution of GLONASS:
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    “GLONASS is a global satellite navigation system, providing real time position and velocity determination for military and civilian users. The satellites are located in middle circular orbit at 19,100 kilometres (11,900 mi) altitude with a 64.8 degree inclination and a period of 11 hours and 15 minutes. GLONASS’s orbit makes it especially suited for usage in high latitudes (north or south), where getting a GPS signal can be problematic. The constellation operates in three orbital planes, with eight evenly spaced satellites on each. A fully operational constellation with global coverage consists of 24 satellites, while 18 satellites are necessary for covering the territory of Russia. To get a position fix the receiver must be in the range of at least four satellites.”
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  2. … and the other term that people are rather more familiar with, GPS:
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    “The GPS project was started by the U.S. Department of Defense in 1973, with the first prototype spacecraft launched in 1978 and the full constellation of 24 satellites operational in 1993. Originally limited to use by the United States military, civilian use was allowed from the 1980s. Advances in technology and new demands on the existing system have now led to efforts to modernize the GPS and implement the next generation of GPS Block IIIA satellites and Next Generation Operational Control System (OCX).”
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  3. Heard of Waze?
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    “Waze (formerly FreeMap Israel) is a GPS navigation software app owned by Google. It works on smartphones and tablet computers that have GPS support. It provides turn-by-turn navigation information and user-submitted travel times and route details, while downloading location-dependent information over a mobile telephone network. Waze describes its app as a community-driven GPS navigation app, which is free to download and use.The Israeli company Waze Mobile developed the Waze software. Ehud Shabtai, Amir Shinar and Uri Levine founded the company. Two Israeli venture capital firms, Magma and Vertex, and an early-stage American venture capital firm, Bluerun Ventures, provided funding. Google acquired Waze Mobile in June 2013.

    The app generates revenue from hyperlocal advertising to an estimated 130 million monthly users.”
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  4. And here’s a podcast that ties all of this together – entirely worth your time. It is by Walter Isaacson, called Trailblazers, and all of the episodes are worth listening to. But this one in particular was well worth it: Navigation.
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  5. And it was only a matter of time (also reading this helped me go down this particular rabbit hole): Augmented Reality and Google Maps.
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India: Links for 21st October, 2019

In honour of the delayed departure of the monsoons from India, five articles about what the monsoon is, and what it means for us here in India.

 

  1. “The unique geographical features of the Indian subcontinent, along with associated atmospheric, oceanic, and geophysical factors, influence the behavior of the monsoon. Because of its effect on agriculture, on flora and fauna, and on the climates of nations such as Bangladesh, Bhutan, India, Nepal, Pakistan, and Sri Lanka — among other economic, social, and environmental effects — the monsoon is one of the most anticipated, tracked, and studied weather phenomena in the region. It has a significant effect on the overall well-being of residents and has even been dubbed the “real finance minister of India”.
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    Wikipedia is always a good place to start.
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  2. “Simulations of future climate generally suggest an increase in monsoon rainfall on a seasonal mean, area-average basis. This is due to the twin drivers of an increasing land-sea thermal contrast, but more importantly, warming over the Indian Ocean which allows more moisture to be carried to India. Typically increases in total rainfall over India may be in the region of 5-10%, although some climate models suggest more and some less. Climate simulations also show different patterns of rainfall change, so it is difficult to predict how rainfall might change within India. ”
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    The Royal Meteorological Society’s take on what is likely to happen in India in the years to come when it comes to the monsoon, and why.
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  3. “This Wednesday witnessed a rare meteorological coincidence. The southwest, or summer, monsoon, finally withdrew from the country, having overstayed and delayed its retreat by a record time. The same day, the northeast, or winter, monsoon made its onset, on time. The two events rarely happen simultaneously, though the three month-winter monsoon season is supposed to begin almost immediately after the end of the June-September summer monsoon season.”
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    The Indian Express on a relatively rare occurrence in meteorological terms.
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  4. … and the Livemint on the same topic.
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  5. “Along with their ancient perfumery, the villagers of Kannauj have inherited a remarkable skill: They can capture the scent of rain.”
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    I’ve probably linked to this before, but it is always worth a reread: on capturing the essence of petrichor.

Video for 20th October, 2019

Tweets for 19th October, 2019

 

 

 

 

Etc: Links for 18th October, 2019

  1. “If I win, I’ll be 18,000 chips to 2,000 chips ahead. If Levitt wins, game over.”
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    Tim Harford plays poker with Steve Levitt. This was a very enjoyable read!
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  2. “And yet there is something about TikTok’s presence in mainstream culture — as a testing ground for “real” stars, as an Emmys joke about what the kids are into — that underestimates the power of the thing itself. It feels as if there are endless TikTok universes unfolding all at once. And so last week, over 48 hours, five critics of The New York Times with different specialties and varying familiarity with the app took a look at what it has to offer.”
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    The NYT profiles tiktok – we are clearly in peak tiktok territory now.
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  3. “During one such inspection in 1731, a British merchant captain named Robert Jenkins protested the intrusion, and in the ensuing scuffle the Spanish captain’s blade somehow separated Captain Jenkins from his left ear. This civilian injury was far from newsworthy back in Britain—after all, smuggling was a rough business. Eight years later, however, when Great Britain sought a pretext for war, it became politically expedient for British politicians to suffer outrage over this unauthorized amputation. Legend has it that Captain Robert Jenkins himself held aloft the very ear in question at a Parliamentary hearing, as evidence for the grave insult to the crown—though there is no historical proof that this exhibition actually occurred. Ear regardless, the outrage was successfully fabricated, and the resulting years of hostilities would come to be known as “The War of Jenkins’ Ear.””
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    11,000 words, but all of them fascinating. This is about a ill fated expedition through the Drake passage. Via The Browser.
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  4. “But the purpose of chronic pain, which scientists define as pain that lasts for more than three months after its initial cause, is more mysterious. The pain’s origin might be muscular-skeletal – the result of a fall, perhaps – or neuropathic, caused by damage to the nervous system. Or it might be a result of a long-term condition, such as fibromyalgia. Whichever way, it is a pain that has gone on beyond its expected life span and does not respond to medication. Often it is a discomfort that has become invisible and shifted shape, growing harder to understand the greater the distance from its original cause. A physiotherapist suggested to me that chronic pain was like a musician being given a piece of sheet music to play. The musician learns the music and when the music is taken away, she continues to play it. The body has learned the pain by heart.”
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    On the tragedy of, and a potential solution to, chronic pain.
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  5. The Madras Courier on a short history of the telephone.

EC101: Links for 17th October, 2019

  1. “In order to combat global poverty, we must identify the most effective forms of action. This year’s Laureates have shown how the problem of global poverty can be tackled by breaking it down into a number of smaller – but more precise – questions at individual or group levels. They then answer each of these using a specially designed field experiment. Over just twenty years, this approach has
    completely reshaped research in the field known as development economics. This new research is now delivering a steady flow of concrete results, helping to alleviate the problems of global poverty.”
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    A simple primer on the work that Duflo, Benerjee and Kremer have won the Nobel Prize for.
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  2. “The first general comment is the idea of randomisation is hardly anything new for researchers who have studied or followed Indian development. The Planning Commission started something called Programme Evaluation Studies way back in 1954 which more or less studied the same thing. Agriculturists — both practitioners and researchers — have also used similar techniques of RCT to see what agricultural intervention worked.In my own research on banking history, I saw how Syndicate Bank started programmes on agricultural and rural development based on near similar ideas of randomisation. To be fair, the 2019 laureates have advanced these ideas using techniques from sampling, statistics, and econometrics to draw finer inferences.”
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    Amol Agarwal over at Moneycontrol points out a more nuanced understanding of both this year’s Nobel Prize as well as the Nobel Prize for Economics in general. Well worth reading!
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  3. The NYT profile on this year’s Nobel Prize.
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  4. “The significance of what Angrist and Pischke termed the “credibility revolution in empirical economics” can be seen in the John Bates Clark Medal awards given to researchers who participated in that revolution. Between 1995 and 2015, of the fourteen Clark Medal winners, by my estimate at least seven (Card, Levitt, Duflo, Finkelstein, Chetty, Gentzkow, and Fryer) are known for their empirical work using research designs intended to avoid the problems that Leamer highlighted with the multiple-regression approach.”
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    Mostly for those truly interested in economics, but Arnold Kling points out how more people should know about Ed Leamer.
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  5. Heavily, heavily recommended: this is the longer version of the first link above, again by the Nobel Prize committee itself.

RoW: Links for 16th October, 2019

Five links about the NBA, China and the United States of America

  1. “Apple removed an app late Wednesday that enabled protesters in Hong Kong to track the police, a day after facing intense criticism from Chinese state media for it, plunging the technology giant deeper into the complicated politics of a country that is fundamental to its business.”
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    The NYT gives us useful background about the topic…
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  2. “But Apple is in a particularly difficult position, due to the company’s success in China: Unlike several other big consumer tech companies, which either do little business in China or none at all, Apple has thrived in China. The country is Apple’s third-biggest market, which generates some $44 billion a year in sales. And Apple’s supply chain, which lets it produce the hundreds of millions of iPhones it sells around the world each year, is deeply embedded in China.”
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    Recode explains the perils of integrating too successfully with China in terms of both backward linkages as well as final sales (that’s a loaded statement, worthy of a deeper analysis!)
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  3. “This morning brings new and exciting news from the land of Apple. It appears that, at least on iOS 13, Apple is sharing some portion of your web browsing history with the Chinese conglomerate Tencent. This is being done as part of Apple’s “Fraudulent Website Warning”, which uses the Google-developed Safe Browsing technology as the back end. This feature appears to be “on” by default in iOS Safari, meaning that millions of users could potentially be affected.”
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    Via John Gruber, over at Daring Fireball (please follow that blog!), a somewhat unsurprising, yet depressing revelation.
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  4. “I am not particularly excited to write this article. My instinct is towards free trade, my affinity for Asia generally and Greater China specifically, my welfare enhanced by staying off China’s radar. And yet, for all that the idea of being a global citizen is an alluring concept and largely my lived experience, I find in situations like this that I am undoubtedly a child of the West. I do believe in the individual, in free speech, and in democracy, no matter how poorly practiced in the United States or elsewhere. And, in situations like this weekend, when values meet money, I worry just how many companies are capable of choosing the former?”
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    Ben Thompson provides useful background and an even more useful overview of the larger picture.
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  5. “Daryl Morey wrote a pro-Hong Kong tweet and had to retract it, and then both the Rockets and the NBA had to eat crow. ESPN — part of the Disney empire I might add — has given only tiny, tiny coverage to the whole episode, even though it is a huge story on non-basketball sites. I’ve been checking the espn/nba site regularly over the last 24 hours, and there is one small link in the upper corner, no featured story at all.”
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    And finally, Tyler Cowen explains how incentives always and everywhere matter.