ISPC (Implicit SPMD Program Compiler) is a compiler made by Intel that can be used to achieve a high degree of parallelism in CPU computations for multiple architectures (not just Intel). It generates parallel programs utilizing SIMD (Single Input Multiple Data) instructions and does it architecture agnostically. SIMD as its name implies are parallel instructions…
Improving weather forecasts with neural networks
I did my physics master’s thesis at Uppsala University in cooperation with the Swedish Meteorological and Hydrological Institute (SMHI). In the thesis I show that neural network based post-processing of meteorological temperature forecasts is a usable method to improve forecast accuracy. The neural network based method had better performance than the contemporary error-filtering methods used…
Embedded development: USB inertial headtracker
What is a headtracker? A headtracker is exactly as the name suggests it is. It’s a device that tracks the movement of someone’s head. The headtracker can track position and orientation. They are particularly useful as devices to enhance the experience in simulators or games. For example if you are playing a flight simulator you…
Embedded development: bare metal programming an ARM Cortex microcontroller
ARM Cortex processors and microcontollers are ubiquitous, it’s such a successful processor architecture. It’s useful to understand how they work and how to use them as tools. When getting started with embedded development with ARM Cortex it might seem like a complex and difficult platform since a lot of the work will usually be done…
Full stack project: encrypt/decrypt messages
Go to web-app This is a web-app project using AES (advanced encryption standard) to send and receive encrypted messages. AES is a symmetrical encryption which means the same key is used for encryption and decryption and a personalized key can be used for sending and receiving messages. Follow the link above to go to the…
Interpreting black box artificial intelligence models
AI models are incredibly useful for making predictive models from various datasets. The models are however often criticized for being difficult to understand. AI models such as neural networks are often described as black box models. Article summary: I predict the likelihood of people making more than $50,000 per year from a US census dataset….
Rendering images on an analogue oscilloscope
Analogue oscilloscopes have a beautiful fluorescent display. The oscilloscope’s electron emitter fires electrons at the fluorescent material which briefly illuminates it at a single point. By sweeping the electrons path across the fluorescent screen images can be made. The trace of electrons need to periodically pass through the parts of the screen that needs to…