# Turtles All the Way Down

### Bitcoin after the ETF

On Friday, March 10th at 4pm the SEC announced their ruling on COIN, the Winklevoss twins' proposed ETF listing on BATS. The price whipsawed, spiking to $1360 on GDAX around noon on speculation that the SEC would take no action (approving the ETF by default) and dropping to$956.85 right after the decision.

The price . . .

March 12, 2017

# Conan & rpaths

### Dealing with dynamic linker errors in Conan

The last post introduced Conan for C/C++ library management. When I sat down to set up a CLion project using the LibUV and LibWebsockets dependencies though I hit an interesting quirk of MacOS X: the problems that its strict @rpath handling creates for package managers like Conan.

## The problem

I set up a new project to create . . .

March 05, 2017

# Conan

### C++ Dependency Management

I last did serious C/C++ development in 1999 while at GS, but since C++11 came out and
Bjarne Stroustrup came to work for Morgan Stanley I have wanted to pick it up again. One of the obstacles was that not only was my knowledge of the language out of date, but so was my knowledge of the development tools and build systems.

Since . . .

February 20, 2017

# JavaFX Composition

### Groovy, FXML and dynamic layouts

This will be the first of a series of short articles on JavaFX, a worthy, underestimated successor to AWT and Swing JFC that probably came years too late to save Java desktop development from .NET and HTML5 but offers a clean rapid-development environment for the JVM:

• the Java API is a step up from Swing -- less verbose; better . . .

January 01, 2017

# The Z800 Needs a Friend (And a Power Supply)

In the springtime the dual GPU setup did in more than one power supply, including both an 850W and 1100W. I finally reached the conclusion back in May that the combination of NYC local electricity costs and the recurring cost of buying refurbished power supplies made ETH mining . . .

December 24, 2016

# Mining ether with cudaminer-frontier

## Final build: Z800 workstation

The last couple of articles covered setting up a refurbished HP Z800 workstation for work on cryptocurrencies: adding RAID storage and putting in a pair of overclocked EVGA GTX 980 video boards to support GPU mining. The resulting machine is probably more power hungry than the ideal rig, but another way . . .

October 11, 2015

# Z800 mining rig ROI calculation

### A computational home heating system

The replacement power supply -- the Z800's third one now -- arrived while we were on holiday, and so far seems to be running better. I decided to put it to the test by mining Dash and Ethereum in order to learn more about the mining process.

Running some numbers, one thing is clear: mining Dash at home with a GPU is a good way to . . .