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How to pass a better gun control law.

  How to pass a better gun control law. Every time a mass shooting happens, people try to pass a better gun control law. But NRA consistently stopped them (see e.g., YouTube: NRA: Last Week Tonight with John Oliver (HBO) ). To prepare for the next mass shooting, a woman called (J.C.) established a non-profit organization. The organization is a bit mysterious under their security concern. But it seems called either WIW N, WASD, or FYN (or possibly multiple organizations)*. What they do is: members are informed when and where the bill will be discussed members are encouraged to call the members senator and representative and informed every chance depends on the distance of the residence they provide the member-accessible database about the congress schedule relevant to their issue A problem is the organization has a bit of tight membership control. I cannot write here how to join, but you will find the way. (A rumor: some comedians seem to know the organization's correspondence.) The
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Floating point reproducibility in parallel processing

The floating point reproducibility problem On a typical computer, the results of floating point operations can differ from the mathematical result. In general, floating point operations like addition may not satisfy all mathematical properties for that operation. For example, the associativity property of addition may not hold for all numerical values: $(x + y) + z \stackrel{?}{=} x + (y + z)$ A decimal representation of a number cannot always be represented by a finite binary representation in computer hardware. For example, the computed result of $0.1 + 0.01 - 0.1 - 0.01$ is not equal to $0$, but mathematically these values should be equivalent. For example, you can demonstrate this using the Python interpreter (Python 3.8.5): >>> 0.1 + 0.01 - 0.1 - 0.01 -5.204170427930421e-18 But mathematical properties do hold in other cases. For example, the result of $0.1 - 0.1 + 0.01 - 0.01$ is equal to $0$. >>> 0.1 - 0.1 + 0.01 - 0.01 0.0 Another problem results from rounding

Berlin Westhafen, responsibility, and arrogance of playing a god

Once I walk around this Hafen with one of my friends, we discussed a book (*) we both read recently. The discussion goes far and in many directions. But I found two points were interesting.  Berlin Westhafen One is as in the title, ``You have no responsibility for what was happened, but you have responsibility for that not happens again. (Original: Ihr seid nicht verantwortlich fuer das, was geschah. Aber das es nicht wieder geschiert, dafuer schon)'' If I think about responsibility, I believe that the people who were not born at that time cannot have ``personal'' responsibility. Some extreme idea says someone has responsibility for all the ancestors did. It does not seem fair because the responsibility is passed on to the descendants. They are words about war, but I think it still holds in the case of war. It should be noted that what I put parentheses around "personal" here may not apply if that is not a person. The other part is an argument that the droppin

A concern about an abnormality on the statistics of number of Japanese COVID-19 patients

We have already had a lot of COVID-19 articles. Every country's goal now is how to reduce the number of death. Since the exponential growth rate of an epidemic, it should be the first priority that how to avoid the corruption of the health system. We need the precise data of how many patients are there. Otherwise we can not have a strategy, how many beds we need, how long we need to lock down, how many test we need to deploy, every strategy needs to be answered the questions: how many X we need? In this article I based on the data from John Hopkins Data Repository   and the analysis of Aatish's Exponential/Logistic Curve-Fitting Site . When I checked this data, I found an abnormality of Japanese data. Figure 1 shows the total confirm cases and new confirmed cases in the past week. Japanese data is way less compare to other countries. Figure 1 Data source: minutephysics: How To Tell If We're Beating COVID-19 You might think, a small new case ratio sounds good.