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Andrey Mikhalchuk’s Blog

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Technoblog about life

Jan 5, 2012 GMail Spam Filter: Why it’s Evil and How to Disable It

I’ve lost an important email recently. Some internet beast in the mail food chain swallowed it silently and never released. After some investigation I found that the party responsible for this evil act was in gmail. And 15 more minutes invested into reasearch revealed a few interesting facts about how Gmail teats spam:

  1. Google’s spam filters are notoriously bad. Go to gmail.com, hit Spam “mailbox” (it is typically hidden under “More” arrow and check out how many non-spam emails are there. I had two dozen emails sitting there.
  2. Google’s spam filters process all emails in a centralized manner meaning there is no way to disable them. Don’t look for this option in the settings – it’s not there. In fact it’s not anywhere!
  3. And on top of this Google’s spam “mailbox” automatically purges emails older than 30 days

So to sum up all this GMail randomly destroys your emails and doesn’t bother about notifying you about that. So here is a workaround for this:

Dec 31, 2011 Using Amazon.com for product ratings? Read this!

Suspicious reviews on Amazon.com

Suspicious reviews

If you’re an online shopper like me you probably use this massive amount of product feedback on Amazon.com for your own good. Sometimes other stores provide better prices, sometimes you need an item urgently so you will buy it offline. But no matter if I’m going to buy from amazon or not I consult its product rating and user reviews.

Of course many sellers also figured out the power of good amazon rating and no wonder that some of them try to play it. Hopefully this post will help you to identify fake reviews and save you some money.

Jun 23, 2011 Controlling RGB LED using PICAXE-08: Basics of software PWM

Driving RGB LED with PICAXE-08M

Driving RGB LED with PICAXE-08M

I’m working on a new RTFMs episode that involves packing an RGB LED and a microcontroller into a very tight space. The microcontroller I decided to use is PICAXE-08. I chose it for three reasons:
- I had one in the box
- I had no other plans for it as it appeared to be not very suitable for what I got it for (a high-altitude balloon project)
- Using it to dim RGB LED is a challenge
Read More

Jun 17, 2011 Juliana and Doyle Brothers Totally Rock!

Jun 3, 2011 Choosing best high-end HT (amateur radio handheld transceiver)

Here is some information for those looking for a high-end HT. My requirements are:

  • At least dual-band (tri,quad-band is a plus), including 144 and 440 bands at minimum
  • Good wideband receiver
  • All-mode receiver
  • Convenient control
  • Weather proof
  • Ruggedly built
  • Having a lot of features, leaving a lot of space for experimentation
  • Major brand
  • Price should be “reasonable”. It’s clear that an HT with the features listed above won’t be inexpensive, but I want to avoid paying extra for features that I don’t need or paying for something I can get cheaper in a different radio.

These are very expensive requirements and only a few HTs fit them. There are three major companies that produce something that fits most of the requirements: Icom, Kenwood and Yaesu with the following models:

Icom Kenwood Yaesu
Icom IC-91A

Icom IC-91A, from $320, dualbander, upgradable to D-STAR

Icom IC-92AD

Icom IC-92AD, from $540, dualbander, suports D-STAR

Kenwood TH-F6A

Kenwood TH-F6A, from $304, legendary radio, excellent scanner, tribander, superwide receiver (0.1MHz-1.3GHz), 5W on all three bands

Kenwood TH-D72A

Kenwood TH-D72A, from $485, dualbander, has GPS and APRS support

Yaesu VX-7R

Yaesu VX-7R, from $320, quadbander, waterproof

Yaesu VX-8DR

Yaesu VX-8DR, from $410, quadbander (with limitations on 220 and 50), advanced APRS support, GPS and Bluetooth upgradeability, WIRES, tree receivers, stereo WFM

Feb 16, 2011 Gmail Super-Glitch

Gmail glitch

Gmail glitch

I encountered an interesting gmail glitch yesterday. I have two email accounts: one personal and one for work. A few weeks ago I was using Thunderbird for both, but after a few cases when I was sending emails from the corporate account and they actually got sent from personal one, I abandoned it and blamed Thunderbird for that. My new interface for corporate email is Safary running gmail web interface. Why Safary? Because I’m not using it for personal purposes at all.

So yesterday I sent an email from that GMail web interface corporate account using “clean” browser and it again got sent from my personal mail account!! How is that possible?!

Here is another part of the mystery. I keep Thunderbird downloading my corporate email for archival purposes and it correctly downloaded that email as outgoing from corporate account! Even better, the From field in that email contained my corporate account, not personal. I think that proves it’s GMail crazy and not me :)

My best guess is that GMail uses some superadvanced magic for detecting multiple mail accounts belonging to the same user and something is wrong with it. Like when I was sending email from web browser and Thunderbird was downloading emails from my personal account at the same time something glitched in the spell and it sent my email from worng account. That’s definitely poor design and I wouldn’t expect such thing from Google, but … who knows.

No solution to this problem so far, I would appreciate any suggestions.

Oct 29, 2010 Teal’c Rebranded

Teal'c Rebranded

Teal'c Rebranded

I’m watching Stargate (nostalgia) and just couldn’t resist …
Read More

Jul 2, 2010 Ruby on Rails: how to override default_scope – a better approach

Ever used default_scope in RoR? Ever regretted you had ever read about this feature after you wrote tons of code and later realized you can’t access the records you need in a convenient way when necessary? Try googling “how to override default_scope” and you will find tons of advices how to do it with model.send(:with_exclusive_scope) { super }, but no real way how to cancel it completely for a model when you really need it (like in tests for instance). Here is a simple solution and a few advices regarding this misfeature:

Jun 11, 2010 How to Do Excellent Presentations. Part I.

funny-dog-pictures-beastie-boysHi!
I’m sitting here at the Rails conference (has nothing to do with trains) and watching at the presenter struggling with the equipment. This leaves me couple minutes to start this post about how to do great presentations and not to do bad ones.

May 21, 2010 Support Preserving Wildlife on Earth


Just watch it. Then read under the cut line.

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