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parimm

86 karma · joined March 20, 2012

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parimm··on Coconut oil jet fuel matches kerosene's efficiency in engine tests
Part time coconut farmer here.

Adding some numbers for a base line. (Note all of these numbers are almost the upper limit of a well managed farm with very good cultivars)

Best yielding palms yield ~300 nuts per pals at 70 palms/acre.

at 750g a dehusked nut with 20% oil yield

You get ~2.3 tonnes oil/acre.

For reference an a321neo burns around 2,300 kg of fuel per hour when cruising

parimm··on Ask HN: What are you working on? (February 2025)
Can you post this code if possible please?
parimm··on Hackers claim to have breached Okta systems
There is cloudflare PII in one of the screenshots, I wonder if Cloudflare was notified of access to their data in January.

Speculation from here on.

In my personal opinion,Cloudflare's actions indicate that Cloudflare was not notified of the breach until today.

```We are aware that @Okta may have been compromised. There is no evidence that Cloudflare has been compromised. Okta is merely an identity provider for Cloudflare. Thankfully, we have multiple layers of security beyond Okta, and would never consider them to be a standalone option.``` - @eastdakota - https://twitter.com/eastdakota/status/1506143353544478724

parimm··on Ask HN: Where is the update from Okta on the breach?
Okta's CEO has put out a statement - https://twitter.com/toddmckinnon/status/1506184721922859010
parimm··on Moderna raises 2021 vaccine output forecast to at least 600M doses
It took 25days from the time the Covid-19 sequence was published to make the Moderna vaccine.[1]

[1]https://www.bostonmagazine.com/health/2020/06/04/moderna-cor...

parimm··on Maruti Suzuki won over India’s car market with Japanese innovation
The electricity infrastructure in the larger cities is not as bad as you mention.

The infra is bad in the rural areas and the quality of infra varies greatly by the state.

parimm··on Weighing a Car with Tire Pressures
Digital ~230 USD - https://www.mcmaster.com/pressure-gauges/pressure-and-vacuum...

Analog gauge ~100 USD -https://www.mcmaster.com/pressure-gauges/pressure-and-vacuum...

Both of the above gauges come with Calibration Certificate Traceable to NIST

parimm··on TSMC Nanke 14 Factory Production Interruption Could Affect NVIDIA and Others
Thank you for making and giving the talk. It got me interested in lithography.

Do you have any plans to give an updated talk. It would be interesting to know about what comes after 7nm.

parimm··on TSMC Nanke 14 Factory Production Interruption Could Affect NVIDIA and Others
Wouldn't using multiple Spectrometry/Spectroscopy methods help in finding out the impurities in the process chemicals?

ICP-MS and NMR should cover most elemental impurities.

parimm··on Fully digital valves open up engine possibilities
Its called a decompression valve.
parimm··on Fully digital valves open up engine possibilities
They have replaced a pure mechanical linkage with a motor in each valve.

A typical 4 cylinder engine will now need sixteen extra motors to run it.

While I like the idea of controlling the timing of each valve interdependently for the other, I am not for the additional electronics in the engine.

parimm··on Why a Typical Home Solar Setup Does Not Work with the Grid Down
The solution to this is to use Hybrid inverters+batteries with a auto disconnect on the mains.
parimm··on Intel: We 'Forgot' to Mention 28-Core, 5-GHz CPU Demo Was Overclocked
The chiller unit consumes 1kW of power

and produces 1.7kW of cooling

parimm··on Intel: We 'Forgot' to Mention 28-Core, 5-GHz CPU Demo Was Overclocked
Just a small clarification,

The chiller is rated at

1.7kW thermal while consuming

1kW electrical

parimm··on Ask HN: Which is the best laptop for programmers under budget?
>Insecure

None of the listed issues were applicable for the laptops that OP recommended

parimm··on Ask HN: Which is the best laptop for programmers under budget?
Also consider the following thinkpads

T5x0 - for a 15" Laptop

X2x0 - for 12" Laptops ( avoid the X2x0s)

W520, w530, P50, P51 - Desktop replacements 15" size

parimm··on DIY Powerwall Builders Are Using Recycled Laptop Batteries to Power Their Homes
18650's have a 18mm diameter. a 32650 would make most laptops too thick
parimm··on Introducing Network Service Tiers
~260ms.

The route was Chennai-Amsterdam-Jordan-Iran

https://pastebin.com/nCT0VA2e

parimm··on Printed Solar Panels for Less Than $10 a Square Metre
Wow,Solar prices in the USA are pretty high. I live in India where solar is under 1.2USD/watt installed. This is for a good module and very good inverter.

I have seen quotations for under a dollar a watt using cheaper components

parimm··on Zomato security breach: 17M email addresses and hashed passwords leaked
md5
parimm··on Zomato security breach: 17M email addresses and hashed passwords leaked
It was md5 with a 2 alpha character salt
parimm··on Zomato security breach: 17M email addresses and hashed passwords leaked
They used a 2 alpha character salt with md5 as the hash algorithm. Thats pretty bad
parimm··on 2017 Chevrolet Bolt EV
There are combined cycle natural gas plants that can go up to 68% eff
parimm··on Everything about the state of the Mac
The Thinkpad T560 [1]

-Slightly thicker at 22.4mm

-With the largest battery you should get 16-20hrs of real world battery life

-Available with a 2880 x 1620 screen

[1]http://shop.lenovo.com/us/en/laptops/thinkpad/t-series/t560/

parimm··on New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected
Mordern batteries last a lot more than one year. Tesla is providing ten year warranties on their batteries for their daily cycle batteries. https://www.tesla.com/powerwall
parimm··on Solar is now cheaper than some coal, says India energy minister
> US¢ 3/Kwh ($30/MWh).

$30/MWh seems to be very very cheap. That is half the price of the lowest bid in India. Is there a source for that number?

parimm··on Solar is now cheaper than some coal, says India energy minister
Solar is viable, you will be looking at a 6-7year payback on the system with interest, 36Lakhs is very high for a 30kW system. The prices should be in the range of 25-27L for an on grid system with a simple structure. Where in Tamil Nadu is this? Ping me if you are looking for more details(mail Id in profile), I work for a company that does solar installations.
parimm··on Introducing the Keybase filesystem
Got it, Thanks a lot :)
parimm··on 52 Places to Go in 2016
Could you please list the suggestions here or PM me? Thanks
parimm··on Making Ocean Water Drinkable
2 liters = .002 cubic meters The amazon river runs off 1300 times the drinking water of the world into the sea
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