Category: Uncategorized

I’m currently reviewing the license model for my mac applications. During this time my applications can no longer be obtained from Apples App-Store. Existing customers should not be affected by this decision. Please contact me if you have any problems to access recent purchases.

I would like to apologize for any inconvenience.

(webm,x264)

A short YouTube video can be watched here: https://youtu.be/xMiWnWOIINI

Or you can download the Linux binary from here: https://yousry.itch.io/carrot-man

The source-code for the demo is available here: https://gist.github.com/yousry/d6921852491457b45073350b4d52ae01

Virtual Mannequin Version 1.17 was submitted to Apples App Store.

Changelog:

• Library Updates
• Swift 3.0 Rewrite
• Customer Requests

Training and usage of neural-networks is sensible for problem cases with an unknown or fuzzy domain. Consequently the complexity and the size of the belonging problem is likewise unknown. However it may be helpful to estimate the error-rate for non verifiable results.

Artificial Intelligence described as class inside computational complexity theory

It is necessary to identify AI as complexity class to obtain clues about its performance. Obviously neural-networks and other machine learning techniques can be run on Turing Machines and at least for some types of NNs it can be shown that they are Turing complete.

Otherwise we know that the results of NNs have heuristic characteristics. They can be both false-positive and false-negative. I also assume that they always stop and return a result.

The closest match I could find inside the class of search problems are Monte Carlo algorithms. The corresponding complexity class for decidable randomized problems is BPP.

Under these assumptions it is now possible to calculate a two dimensional map to predict the error rate (between 0 = infrared and 1 = ultraviolet). The X-Axis thereby defines the domain size and the Y-Axis the problem complexity:

It is also possible to inspect the result, if the error-rate does not grow linearly with the domain size..

or with the complexity:

Over a period of ten hours my Mac handled 157 different connections. Most of them are used to uphold LAN services like neighbor advertisement(NDP). I crated an application that creates small graphs for a visual comparison of network traffic.

Overview of Internet connections

NTP

Overall 115 connections via NTP were counted. From the incoming addresses one was striking: scan-04b.shadowserver.org. A fast search revealed that my firewall could use a rule-set update (Ref: https://ntpscan.shadowserver.org/). At first, a NTP query was started every minute and by the end of the 10 hour test the interval time extended to 20 minutes. These irregular intervals can be explained by NTPs update strategy to maintain the highest possible accuracy. If a high accuracy of less than 10 milliseconds is not needed, an alternative method available with Linux/SystemD can be used. With the systemd-timesyncd service the system clock is synchronized only once during boot:

Email and Social Media accounts

Email accounts are queried hourly without user activity.

Other Services

Other Services, for example up-to-date weather information are queried every three hours.

Jabber service

Apples Jabber service was activated every 10 Minutes.

The Cloud

The Mac connected itself once every hour to the cloud. Interestingly the data transmitted with Transport Layer Security (TLS) 1.2 never changed.

Application Updates

Applications, not distributed by the AppStore, have their own update intervals. At 10 o clock GpgTools decided to update itself.

Oddities

At two occasions the system tried to send defective tcp packages. Both were rejected by the router.

Linux

I stopped the test with Linux after three hours. The system was silent and did not open any connection outside the LAN.

Considerations

I suspect that my Mac has a very individual setup and differs a lot form other possible configurations, but it should be expected that macOS on average creates more background network traffic than a Linux distribution like ArchLinux.

I uploaded the first part of my old News Trend System to GitHub: https://github.com/yousry/KungleAsap. This package contains the web frontend and a trend detection algorithm based on Markov chains. The project was stopped because text mining became increasingly difficult/illegal under local and international laws. The project contains Scala sources and the necessary glue-code for Lift.

The project can be build with the provided Project Object Mode(pom) file for Maven.

The sourcecode can be found on GitHUB.