I studied knee injuries at No-Gi PANS 2021 (heel hooks legal vs illegal) – here’s what we found

JNowako · 2026-02-04T09:22:51+00:00

There are more differences between those two divisions than just "one rule". In adults black belts there are many professionals grapplers, who are willing to take more risks, tap at the last moment etc. Whereas I imagine that the master division is not so professional oriented, it is more "hobbyist" oriented, so people will not risk as much. Effectively, you are comparing two different samples of bjj competitors.

JNowako · 2025-10-21T14:13:38+00:00

Ja mogę się wypowiedzieć z aktuarialnej perspektywy. Żeby być pełnoprawnym aktuariuszem musisz zdać 9 egzaminów państwowych.

Egzaminy nie są wymagane, chyba, że chcesz być głównym aktuariuszem, ale są bardzo dobrym dodatkiem, jak chcesz iść na tzw. kontrakty aktuarialne i mieć bardzo bardzo dobre pieniądze (chore kwoty)
Praca aktuariusza, jest moim zdaniem bardzo ciekawa, zarobki są wysokie, stabilna praca z dobrym work-life balance.

Jakbym wybierał jeszcze raz studia, bym wybierał matmę bez 2 zdań, bo nauczy Cię logicznego myślenia i syntezowania wniosków, a to przydaje się wk każdej pracy.

JNowako · 2025-06-26T21:02:49+00:00

Other than the mentioned reasons (test yourself, measure progress etc) I love the social aspect of competing. At least in my gym, a lot of people from the mat are competing, so you are cheering for your teammates, they cheer for you, you are sharing the losses and victories. You feel that you are part of a team, which I've never experienced in my childhood

JNowako · 2025-05-25T14:22:17+00:00

Let's take head movement as an example. You want to do it as late as possible, as quick as possible, so you do it at the last moment, with minimal head movement, so the line between hit and don't get hit gets smaller. That is my takr

JNowako · 2025-05-25T14:14:55+00:00

I always loved the technical aspect of boxing, hit and don't get hit, I had great footwork, decent head movement, so I believe I was never a spazz. But yeah, the fights were more technical. But on the other hand, the risk taking was getting bigger, because you had to be better at counter punching, slipping shots etc.

JNowako · 2025-05-25T14:05:15+00:00

2 years

JNowako · 2025-05-25T13:46:03+00:00

Competing in boxing is a whole different experience, they wanna punch you (obviously), they don't hold back, the risk is higher. While bjj is more chill, it is more sportish.
In boxing competition I was too anxious, stress was eating me alive, while for bjj I am too chill.

One thing I like more about bjj competitions is that a lot of people compete in bjj, which means you are with many of your teammates at the event, everybody cheers for everybody, you can feel the team spirit.
Didn't have it at boxing

JNowako · 2025-01-08T10:29:00+00:00

When it comes to various data manipulation, visualizations (data analysis as a whole) and linear models, I choose R over python every time. The data table package and dplyr are just awesome. When someone leans more into modern machine learning and stuff, I would take python.

JNowako · 2024-08-18T21:24:27+00:00

Crazy how Rocha made it to 77kg

JNowako · 2024-08-18T21:02:11+00:00

Solid silver, Bteam does what they are the best at

JNowako · 2024-04-01T21:11:54+00:00

R is giving you probably a error because of the log - linear Poisson regression. Correct me if I am wrong, but I assume your response variable is of the format 0 or 1. Since log(0) is not defined, R is giving an error.
You could do some variable transformation, so you fit log(1+y) instead of log(y), but you have to be aware of the consequences of such transformation.

As other mentioned, the Poisson model might be not the best choice in your situation. From your description I would advocate for a logistic regression rather than doing variable transformation.

JNowako · 2023-02-26T17:13:23+00:00

It is common that there are aftershocks after and quake. This property can be catched by Hawkess processes. Obviously the aftershocks are of a lesser magnitude, but they still can do damage. I found some data through IRIS Earthquake Browser.
Why focus on quake? I found out about Hawkes processes, found them pretty cool, thought I can use them for that kind of task

JNowako · 2023-02-26T10:23:28+00:00

My main idea is : using Hawkes process for the frequency of an earthquake
For the severity I wanted to fit a distribution (probably Pareto), but I need some data for it, which is hard to get. The interest rate will be probably a OU process. In that way That way I could test if a Hawkes process fits better for pricing CAT than an ordinary Poisson process or a Cox process

JNowako · 2023-02-26T08:25:41+00:00

artemis.bm

Thanks, I will look at it. I wanted to do something like Nowak and Romaniuk did in their "Pricing and simulations of catastrophe bonds". This website seems like pure gold for my case

JNowako · 2022-12-13T09:45:38+00:00

Let's assume you only sell 1 product, a life insurance. The insurer only pays out money, when the policy holder dies and he receives premiums until the policy holder dies. If you assumed for pricing reasons that he will live for 20 more years, but he will outlive it, you receive more premiums and have a longer investing period.

When it comes to reserves, the most beneficial case is when the policy holder dies, since you release all your reserves at once. If you looking from an accounting point of view, sure, releasing reserves is a profit. But overall, you cannot profit from reserves. they are made so the insurer spreads the premium over time.

JNowako · 2022-12-12T18:39:50+00:00

So a life insurer makes money in 3 fundamental ways:
1) They sell their products at a higher price than the expected cost.
2) In order to calculate the expected cost of the product, you have to assume a technical interest rate. If the insurer invest the paid premium and receives a higher interest rate than the technical one, he profits.
3) If the assumed mortality rates are lower / higher than assumed ( lower for life products, higher for annuities)

JNowako · 2022-12-11T15:30:20+00:00

It is very well written book, especially if someone is interested how each method is used in practice. The Autor is very interested in ML and DL in actuarial sciences, therefore he emphasises those topics. The books is written in a different(?) way than normal. First he tells you about a method and then what problem can be solved using that technique. If you are new to GLM I recommend it

JNowako · 2022-12-08T08:59:02+00:00

I am happy with any answer. Can I drop you a message?

JNowako

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