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brchr commented on Rolex Caliber 7135: new indirect impulse escapement and high frequency movement   hodinkee.com/articles/int... · Posted by u/namanyayg
LeoPanthera · 5 months ago
Rolex is a funny brand. They have cheap models that exist exclusively for you to make a dealer happy by buying several of them, before they will consider allowing you to buy a high-end watch.

“Normal” people can’t actually buy these high-end Rolexes, even if they have the money.

brchr · 5 months ago
This is only half correct.

It is true that some/many Rolex AD’s will allocate the most desirable watches to customers with an existing purchase history, and that some customers therefore buy less desirable models in order to earn goodwill with the AD.

However, it is not the case that the most desirable watches are necessarily (or even on average) the most expensive models. For instance, it is generally the steel models that are the most desirable and command the highest markup from MSRP on the secondary market. The Submariner, the Daytona, the GMT-Master II: almost all of Rolex’s most iconic, most in-demand, most "flippable" watches are the full steel versions, which are the cheapest versions of those model families.

To give a concrete example, it is generally considered easier to get a full-gold GMT (~$43k) or a two-tone (half steel, half gold) GMT (~$18k) at an Authorized Dealer than it is to get the full steel version ($11k).

brchr commented on Analysis of 2024 election results in Clark County indicates manipulation   wcia.com/business/press-r... · Posted by u/beedeebeedee
brchr · 7 months ago
It is possible to reproduce one of the key claims in this post -- the "Russian tail" in the early voting tallies -- straight from the raw data hosted on the Clark County, NV website. This code can be run in a Colab notebook:

  # Download and extract zip file
  import requests
  import zipfile
  import io

  # Get raw data from Clark County website
  zip_url = "https://elections.clarkcountynv.gov/electionresultsTV/cvr/24G/24G_CVRExport_NOV_Final_Confidential.zip"

  # Download the zip file
  response = requests.get(zip_url)
  zip_file = zipfile.ZipFile(io.BytesIO(response.content))

  # Extract to the current working directory
  zip_file.extractall()

  # Close the zip file
  zip_file.close()

  import pandas as pd
  import matplotlib.pyplot as plt
  import numpy as np

  # Read the actual data, skipping the first three header rows and excluding downballot races
  df = pd.read_csv('/content/24G_CVRExport_NOV_Final_Confidential.csv', skiprows=3, usecols=range(21), low_memory=False)

  # Find the Trump and Harris columns
  trump_col = "REP"
  harris_col = "DEM"

  # Convert to numeric
  df[trump_col] = pd.to_numeric(df[trump_col], errors='coerce')
  df[harris_col] = pd.to_numeric(df[harris_col], errors='coerce')

  # Filter for early voting
  early_voting = df[df['CountingGroup'] == 'Early Voting']

  # Group by tabulator and calculate percentages
  tabulator_stats = early_voting.groupby('TabulatorNum').agg({
      harris_col: 'sum',
      trump_col: 'sum'
  }).reset_index()

  # Calculate total votes and percentages
  tabulator_stats['total_votes'] = tabulator_stats[harris_col] + tabulator_stats[trump_col]
  tabulator_stats['harris_pct'] = tabulator_stats[harris_col] / tabulator_stats['total_votes'] \* 100
  tabulator_stats['trump_pct'] = tabulator_stats[trump_col] / tabulator_stats['total_votes'] \* 100

  # Create subplots
  fig, (ax1, ax2) = plt.subplots(2, 1, figsize=(10, 8))

  # Plot Harris histogram
  ax1.hist(tabulator_stats['harris_pct'], bins=50, edgecolor='black', color='blue', alpha=0.7)
  ax1.set_title('Distribution of Harris Votes by Tabulator (Early Voting Only)')
  ax1.set_xlabel('Percentage of Votes for Harris')
  ax1.set_ylabel('Number of Tabulators')

  # Plot Trump histogram
  ax2.hist(tabulator_stats['trump_pct'], bins=50, edgecolor='black', color='red', alpha=0.7)
  ax2.set_title('Distribution of Trump Votes by Tabulator (Early Voting Only)')
  ax2.set_xlabel('Percentage of Votes for Trump')
  ax2.set_ylabel('Number of Tabulators')

  plt.tight_layout()
  plt.show()

This produces a figure identical (up to histogram bucketing) to the one at the end of the linked article.

brchr commented on Let's Encrypt is 10 years old now   letsencrypt.org/2014/11/1... · Posted by u/gslin
usr1106 · 9 months ago
https://www.internethalloffame.org/inductees/

None of them I have ever heard of. Whatever that may mean.

Edit: On the whole list https://www.internethalloffame.org/inductees/all/ I spotted maybe seven names. Still a single digit percentage.

brchr · 9 months ago
Vint Cerf & Bob Kahn (TCP/IP), Paul Baran (packet switching), Tim Berners-Lee (WWW), Marc Andreesen (Netscape), Brewster Kahle (Internet Archive), Douglas Engelbart (hypertext), Aaron Swartz (RSS, Creative Commons), Richard Stallman (GNU, free software movement), Van Jacobson (TCP/IP congestion control), Jimmy Wales (Wikipedia), Mitchell Baker (Mozilla), Linus Torvalds (Linux)...

...but you’re missing the point of my comment, which is simply to acknowledge and honor (my late dear friend) Peter.

brchr commented on Let's Encrypt is 10 years old now   letsencrypt.org/2014/11/1... · Posted by u/gslin
brchr · 9 months ago
Peter Eckersley (1978-2022) was posthumously inducted into the Internet Hall of Fame for his founding work on Let’s Encrypt. The Internet is a better place because of Peter (and his many collaborators and colleagues).
brchr commented on Gravitational wave researchers cast new light on Antikythera mechanism mystery   gla.ac.uk/news/headline_1... · Posted by u/ulrischa
triyambakam · a year ago
Is there evidence that it was actually made in Greece or could it simply have ended up there?
brchr · a year ago
My understanding of the evidence is that it suggests the mechanism was made in Rhodes.
brchr commented on Lamport's Bakery algorithm, demonstrated in Python   github.com/Dicklesworthst... · Posted by u/eigenvalue
brchr · 2 years ago
Leslie Lamport gives a short oral history of the Bakery Algorithm in Episode 3 of "Algorithms at Work": https://www.audible.com/pd/Episode-3-Concurrency-How-to-Coor...
brchr commented on Misalignment Museum   niche-museums.com/110... · Posted by u/another
ahepp · 2 years ago
This actually brings to mind a conversation I've been having with my buddies recently. Has there ever been a case of harm from AI misalignment?

Not some kind of speculative art exhibit, but real harm?

brchr · 2 years ago
Author of "The Alignment Problem" here, to say: Of course this question depends on your semantics of "harm," "AI," and "alignment," but by most definitions (and certainly by mine) the answer is overwhelmingly yes, many.

These harms can be diffuse at massive scale, and acute at small scale.

One example of each: (1) https://www.science.org/doi/abs/10.1126/science.aax2342 One of USA’s largest health insurers builds ML system for patient triage. It optimizes for a proxy metric of health need (namely, cost) rather than health need itself; consequently it deprioritizes and systematically excludes millions of people from access to health care.

(2) https://en.wikipedia.org/wiki/Death_of_Elaine_Herzberg Autonomous Uber car builds their braking system on top of a vision model that optimizes for object classification accuracy using categories of {"pedestrian", "cyclist", "vehicle", "debris"}; consequently it fails to determine how to classify a woman walking a bicycle across the street, as a result killing her.

In both cases, optimizing for a naively sensible proxy metric of the thing that was truly desired turned out to be catastrophic.

brchr commented on Mechanical Watch   ciechanow.ski/mechanical-... · Posted by u/todsacerdoti
cyounkins · 3 years ago
> I started working around pulsed high voltage last year (100kV+) and now it loses a couple minutes a week.

Are these two things somehow related to one another?

brchr · 3 years ago
Watch movements are generally sensitive to magnetic fields, and can become magnetized and lose accuracy. Some watch models explicitly advertise their level of resistance to magnetism, for instance the Rolex Milgauss, which is designed to withstand 1,000 ("mille") gauss.
brchr commented on The Antikythera mechanism reveals new secrets   scientificamerican.com/ar... · Posted by u/ppod
dghughes · 4 years ago
Patreon has gone from helpful support by a few to an exclusive club.
brchr · 4 years ago
For the donation of a single dollar, you are given access to all of his videos. I would not describe that as "exclusive," although I understand what you are saying.
brchr commented on Algorithms to Live By   algorithmstoliveby.com/... · Posted by u/teleforce
drallison · 4 years ago
I have not read the book, but I did look at the TOC. It seems remarkably trival and not very useful. I am a great believer in teaching algorithms and algorithmic thinking to everyone, but this book seems too simple-minded.
brchr · 4 years ago
I can see why you might think that on a first impression, but I genuinely think you’d be surprised! (Book has been discussed on HN quite a few times, e.g., https://news.ycombinator.com/item?id=25717949.)

u/brchr

KarmaCake day330May 4, 2015View Original