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Coronavirus live news: US oil market collapses into negative prices | World news


Trump claimed at the start of the press conference that the coronavirus rate was better in the US than many other places in the country.

While the death rates in the US, both in comparison to the number of confirmed cases and in comparison to the population, are relatively good, they are not the best in the world based on the most reliable available data – which even experts agree may not be all that reliable.

Research by the US’s Johns Hopkins University showed that as of April 13, the death rate in the US was 4% of cases and 6.73 deaths per 100,000 population. That is significantly better than rates in hard hit countries such as Italy, Spain, the UK and France, and similar overall to Iran, which was also an early hotspot. But death rates are higher in the US than Germany, South Korea, Japan, Australia, and many other countries.

The death rate in China had been recorded as 4% of cases and 0.2 deaths per 100,000 population. That was before the Chinese government increased the official death toll from Wuhan, the original base of the outbreak, by 50%. And there are ongoing questions about all of China’s reported numbers in relation to the coronavirus.

Meanwhile, the New York Times has published a long and useful article detailing the enormous difficulties in pinpointing death rates in different countries and even different areas and populations within countries.

The virus swept in so quickly and is still so relatively new that we are only now grasping that there may be huge numbers of people who have or had Covid-19 without showing symptoms, have not been tested or who died at home or in a care home without that death every being verified as resulting from coronavirus.

The New York Times gives a rough rule of thumb that, according to various unofficial Covid-19 trackers that calculate the death rate by dividing total deaths by the number of known cases, about 6.4% of people infected with the virus have now died worldwide.



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Japanese newest Li-Ion battery-equipped submarine arrives at homeport – Defence Blog


Japan Maritime Self-Defense Force announced on April 8 that its new Soryu-class submarine, JS OURYU (SS-511), arrived at homeport Kure, Hiroshima prefecture.

OURYU is the newest Japanese submarine, as well as the first lithium-ion battery powered submarine. She will take on the surveillance mission around Japan.

Lithium-ion batteries have almost double the electric storage capacity of traditional lead-acid batteries, and by not only replacing them in the existing battery storage areas but adding to the already large battery capacity by also filling the huge space (several hundred tons displacement) inside the hull previously occupied by the AIP Sterling engines and their fuel cells with these new batteries, the amount of (more powerful) batteries carried overall is massive. This has improved the underwater endurance significantly and is felt will be an advantage over the slow recharge capability of the AIP system.

The Ouryu is the sixth Soryu-class boat to be built by Mitsubishi Heavy Industries and is 276 feet long, 2,950-pound submarine that supports a crew of 65 people and carries up to 30 21-inch heavyweight torpedoes.

Ouryu was christened in June of 2018, but was recently brought into service.

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