Author Archives: George Valentin Voina

Blog links: Blockchain news

By | February 8, 2017

Some interesting blockchain related resources from the internet: The Chain API (a very easy to use) blockchain infrastructure. One of the easiest to use library and with a nice written tutorial. So spin your blockchain network in minutes with it. See Chain tutorial and the API JavaDoc A nice article putting blockchain in the context… Read More »

Back-up your Google data

By | February 8, 2017

There is a new tool from Google available to all that want to keep a backup of their Google data. I know that Google means “free” mail and “free” cloud space for lots of you but for the faint hearted a backup is always welcome. If we look at the Yahoo issue (due to bad… Read More »

Windows finally has an OS in it

By | January 17, 2017

Starting with build 1607 finally Windows 10 has a Linux in it. To enable the Linux user space (basically an Ubuntu) the following has to be done: STEP 1: Update Windows to 1607 Make sure you update Windows 10 to a build at least 1607. STEP 2: Activate developer mode Settings -> Updates & security… Read More »

Glassfish MQ: Secure, database backed GlassFish MQ for high volume applications

By | February 8, 2017

GlassFish MQ is a very powerful messaging server solution if correctly configured. By default the MQ server is defined to store the content of queues on files on disk, is accessible through insecure connections and has lots of limitations for message size or number of consumers/producers associated with a queue. This default setup is OK… Read More »

Backup: Daily back-up on external encrypted disk with rsync and cron

By | February 8, 2017

Everybody knows the importance of a daily back-up. There are a lot of tools with fancy GUIs and useless information but sometimes the best is to keep it simple. Linux offers some very powerful build-in ways of creating a perfect backup. The scope is to create a secure incremental automatic daily backup without using fancy… Read More »

Storage: Optimize SSDs with fstrim

By | January 10, 2017

Using SSD drives is no longer an exception, they are used in home systems but also in server systems to hold at least the OS, or other resources that need more speed than space. As any other storage disk a SSD can become fragmented as successive write/delete operations will try to use the available storage.… Read More »

Blog Links: The ripple effect of virtual assistants and inteligent houses

By | January 12, 2017

The ripple effect of virtual assistants is something that appeared as an idea in a lot of SF movies. Think about Terminator or A.I. where we see this kind of ripple effect that starts from one A. I. and then ripples through all the A.I.s like a wave and washed everything including the human civilization.… Read More »

A.I. : State-of-the-art of Computer Vision

By | January 5, 2017

In another life (almost 14 years ago) for some years I had the privilege to be a member of one of the top European computer vision groups VISICS/PSI VISICS/PSI. My focus then was object categorization using neural networks, not a very popular topic at that time due to limitations in data availability and computation power.… Read More »

DB2 : Errors when a database nickname or view is no longer available

By | February 8, 2017

In an enterprise application based on hibernate running over DB2 we have to refer with several views and nicknames to external tables. This can be the case when SSO is used or there are some common static data (accounts, user entries, financial constants etc. ) that are kept in a centralized database repository and are… Read More »

EdgeRouter: UBNT releases fix for firmware 1.9 that broke my l2tp/ipsec

By | December 31, 2016

That warm feeling that you contributed to the community when you find your bug report in an official release notes 🙂 There is a new firmware release EdgeRouter ER-8/ERPro-8/EP-R8: Firmware v1.9.1 that reports as fixed an issue first reported by me for the 1.9 firmware. The issue was reported in the thread Update to 1.9… Read More »