Who is Claes Ai?     http://ahlins.net

My name is Claes Gunnar Henrik Ahlin and I'm born in 1937. Below is a brief biographical history in reverse chronological order.
My main interests are: people, IT, photography and video, music, travel.

Until my retirement on 31 December 2002, I was a teacher at National School for adults, SSVH, (later: National Centre for Flexible Learning, CFL) in Härnösand, in mathematics and physics. My teacher's signature was "Ai.".

During my 25 years as full-time teachers in this distance learninig school, http://www.cfl.se, my activities included several high school subjects: science, chemistry, technology, machine design, production technics, philosophy, computer operating systems, Unix, C programming, Pascal programming, programming methodology, various word processing courses.

Over a number of years, I led the computerization of SSVH's student records and system of summonses, grade recording, etc. This system (which was used between 1981 to 1993) was run and developed on minicomputers (ND-100 from Norsk Data AS with the OS: Sintran and Cobol as the source language) . 1993, I participated in the conversion of the student database from Isam files for Gupta relational database, where we were rid of "year 2000 problem". All conversion software I wrote in C language and ran in alternating Unix and MS-DOS environment.

In the spring of 1975 I was employed as deputie headmaster at SSVH.

Before I started full time amployment at SSVH, I worked for six years as a teacher of mathematics, physics and chemistry at Teacher Training College of Härnösand. For a couple of years I was also head of department for internal television (CCT) at this school for primary and secondary school teachers.

In 1968 I and my family: wife Margaretha (born Håkansson) and two children, Ingrid and Hans, moved to Härnösand in the North of Sweden, where I worked, the fall 1968 and the spring 1969, as a teacher at Franzénskolan, a secondary school. I taught mathematics, physics and technological orientation, which technology subject was called back then.

1967-68 I studied at Teacher Training College of Malmö where I also lived for about 12 years.

1964 - 1967, I studied for a master degree at the University of Lund, while I was working half time at AB Tetra Pak in Lund, the development department. My last assignment at Tetra Pak was a project that examined extreme pressure waves impact on microorganisms. The shockwaves (in liquids) was generated by means of electromagnetic pulses generated by flat, spiral-shaped coils which were connected to a capacitor-battery with the help of water-cooled ignitrons. Current pulses reached to about 100 kA at durations of about 100 microseconds. The Capacitor battery was a couple of cubic meters tall. Pressure wave amplitudes reached about 800 Bar. The ideas for these pressure-generation-methods we got from "Drittes Physikalische Institut" in Göttingen, Germany. Our operations are housed in an old, small factory-building at Bangatan in Lund (opposite the railway station). The project was named after the current week-day name in the calendar (was customary at Tetra Pak then) and was therefore named "Eugene". We called our project "Eugene Bang" , because we worked on "Bang.". My collegues at the project were Civil Engineer Knut Joelsson and Dr Bernhard von Bockelmann. Our senior project manager was Dr Gad Rausing. The project was suspended in 1967, when we sold our current-pulse generator to the University of Lund, Department of Atomic Physics (Prof. Lennart Minnhagen).

1958 when I just had quitted from compulsary military service at "I6", infantry regiment in Kristianstad, I applied a short-term job at Tetra Pak in Lund. It would, according to the ad, to be about 6 months and it suited me then, for I and my expectant wife had planned to seek work in Africa. My wife already had an offer of a teaching job in Ethiopia. There never was a period of africa (I have not yet visited Africa, the only continent with Antarctica, which I have not been on). [In the spring of 2001 I went and Margaretha to South Africa with a group of geography students at My School] My work at AB Tetra Pak, with subsidiaries lasted over six years. I was stationed in Alnarp in the department "National Testing Dairy" (Professor Per Swartling). There, I explored ways to sterilize packaging materials with different chemical and physical methods. Today you can buy durable, liquid food products in Tetra Pak Aseptic in most grocery stores all over the world.

Before I did my military service as a radio operator in the infantry, I went to the Poly-Technical High-School in Malmo (current: Pauliskolan) in the three-year college graduate Line (1955-1958). It had "general technical" approach and was the only of its kind in the country. I did lodge a greater appreciation for the subjects of businesscalcylus and housbildning engineering, which I later in life, however, have benefited.

Before I left my hometown, Landskrona, where a grow up, to become "an engineer in Malmo," I went five-year junior secondary school at Higher General College in Landskrona. (1950 -1955). Before that I had passed the compulsory elementary school in Borstahusen, about 4 km north of Landskrona. We lived on the road from town to Borstahusen (Strandvägen 263), 3 km north of Landskrona. 1945 I started my schooling in Borstahusen's Elementary school in a so-called B-class, where both "first graders" and "second graders" were in the same classroom and had the same teacher: Hulda Pihl. In third grade we had a male secondary school teacher, Stig Nordin, and we crowded four different classes in the same classroom with one teacher. It was at once a "classmate" at the "third-graders", "fourth-graders", "fith-graders" and "sixth-graders", with the latter, we newcomers, regarded as small 'gentlemen' with an extensive life experience. They both used tobacco-snuff and spoke in vulgar terms about the older girls in the class. I was moved in 1938 (4 months old) by my mother Elsa Ahlin, Alnön and my two sisters (Tora, Karin) to Landskrona where my father, Carl-Gustav Ahlin got a job at a Textile factory (Solblomman AB), after being unemployed in Sundsvall, where the department store "DEA" (Dam Ekiperings AB) made bankrupt. I was born in Sundsvall's Childbirth Clinic in December 16, 1937. As a child, I often returned to my grandparents, master painter Johan Henrik Dahlstrom and his wife Olga, who lived in Sundsvall.
Last modified 2018-08-19 EOF