Hacker News Reader

keiran_cullon The human heart shows signs of ageing after just a month in space

This is very interesting, but I wish the article did more to offer some common hypotheses on exactly why this happens.

keiran_cullon Scramble: Open-Source Alternative to Grammarly

From what I understand, they've used a whole bunch of different kinds of AI models over the years.

They've been reasonably transparent about how things work, e.g. this blog post from 2018: https://www.grammarly.com/blog/transforming-writing-style-wi...

keiran_cullon Fixing a fifteen-year-old curve fit bug

> There’s something magical about diving into solving a bug. I’m able to find real focus, time flies and I come out the other end tired yet invigorated. I really enjoy these kinds of bug-hunting puzzles and I seem to be fairly good at it.1 But maybe I’m just overly stubborn (in a good way!).

This is a really eloquent way of describing the feeling. I feel like most people have the instinctive response to ask "why do you care?"

Honestly, not clear! Sometimes it's just satisfying to leave stuff better than you found it. Fixing a bug is therapeutic like cleaning your house, only it's more intellectually interesting :)

keiran_cullon Ask HN: Struggling with poor memory and executive function. What to do?

In terms of medication, my own personal experience has been:

* Ketamine was life changing (for depression symptoms)

* Stimulants help me a lot. The first time I took adderall, I cried, because I had never experienced such a relaxed state of calm or peace. I haven't been able to get any due to the longstanding shortage, and my quality of life has suffered as a result. Other drugs help me to control my focus, but they don't tend to help my memory or emotional regulation much.

* I also take antidepressants that are slightly helpful.

* Diet, exercise, and sunlight make a huge difference.

keiran_cullon Ask HN: Struggling with poor memory and executive function. What to do?

Regrettably, it's a cocktail of highly interrelated psychiatric issues:

1. cPTSD 2. ADHD 3. Depression 4. (Relatively mild / high-functioning) autism spectrum disorder

Likely combined with aftereffects from mild traumatic brain injury (i.e. a high number of concussions), but this part is largely speculative.

Would not recommend attempting to research your way into a solution without the help of a trained practitioner.

keiran_cullon Ask HN: Struggling with poor memory and executive function. What to do?

There are many things that could result in what you're describing. If in USA, you should visit a psych MD to discuss your concerns.

I have experienced similar issues and received medication for [underlying condition], which has helped immensely.

keiran_cullon NPS doesn’t say anything particularly useful

What exactly would you suggest it's a leading indicator of? Churn?

Ultimately if it matters, it should have to be an input to the cash flow time series -- mediated by churn -- no? (Article means to frame free cash flow as a series rather than a point-in-time value).

If you're interested in forecasting, as a company, you should know the things that mean your customer is not doing well within the specific context of your specific business. E.g. in software, you should have a customer health score that's built up from product data. Or you could ask simple questions that are easily interpreted, e.g. asking "how would you rate X's value for money," or "how satisfied are you with X," or even "have you recommended X in the last Y months." These things have a cleaner relationship to future business metrics and a tidier interpretation.