Glider Training: Boxing the Wake

When you first start flying gliders one of the things you are shown then soon made to practice for your check-ride is Boxing the Wake. This is a maneuver you do on aerotow where you first go down through the wake of the tow plane to a low tow position (under the wake).

Boxing the Wake, Source: FAA Glider Handbook (pg 104)

You typically start in the low tow position then progress to either lower left or right corner. Then the upper corresponding corner. Back to the low tow position and back up through the wake to the normal high tow position.

The wake is caused by the prop of the plane disturbing the air it is pulling the plane through. When you go through the wake for the first time early in lessons it can be unnerving feeling. But it is not dangerous and with practice Boxing the Wake can be fun since you are able to practice stick and rudder skills to do it proficiently.

Setup PAI Coin Full Node with Tor Support

Ubuntu 16.04 LTS

This HOWTO assumes you will be setting up a seed node with no wallet enabled. It is noted in steps the option to add wallet support if desired.

Install dependencies:

sudo apt-get install build-essential libtool autotools-dev automake pkg-config libssl-dev libevent-dev bsdmainutils python3

Boost dependencies:

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Using Qubes OS for Fun and Profit

Note: This review assumes the reader has a basic understanding of what Qubes OS is and how it works. Please refer to their site for introductory information.

I have been using Qubes OS full time for about six months. The design and architecture have intrigued me for much longer than I have been using it. One of the main hurdles to using Qubes OS is the hardware compatibility needs. My old computer had some issues, so I bought a Dell XPS with i7 Intel processor and 16+GB RAM. My chance had come to give Qubes OS a real try.

Being that I am a full-time consultant for DevOps, Information Security, and Cloud Architecture my needs were a bit different from your average user. With multiple clients with many logins and VPNs, it can be tricky using one main OS (Linux) with VMs.

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Challenges and Solutions for Tech Companies Doing Business in China

China is a unique challenge for building infrastructure for SaaS or App based services. Unlike other (or most other) countries in the world, China has additional hurdles to overcome to offer services to Mainland China effectively.

From the legal standpoint, there is the ICP license is required for every domain name used in China. So it is a challenge for outside companies to get a license since they are outside of China. Many must partner with 3rd parties to obtain this license. Cloud providers like Tencent or AliCloud help users to gain use their license. So once you have your ICP taken care of you must now build cloud infrastructure.

One big issue with trying to work from outside China to service providers inside is what referred to as “The Great Firewall of China” is a state-run firewall that filters content and ports used for services the Chinese government has an issue. A recent example is their crackdown on the use of VPN (Virtual Private Networks) which are frequently used to circumvent the content blocking. However, for administrators are used to connect to cloud providers to manage services securely.

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