The man who brought operational tags into Bivrost

The man who brought operational tags into Bivrost

How a Brazilian survives the Norwegian winter

About one month ago João Paulo Casagrande Bertoldo finished his internship at Kelda. He started in June 2018 and worked with the Bivrost data portal in his time here. The main outcome of his stay at Kelda was an important extension of the Bivrost to describe phases and operations in the field data. This tool will be a vital part of the continued development of the Bivrost product for reports of the progress of an operation.

Hi Joao, could you tell us a bit about yourself?

I’m 24 years old and come from Paraná in Brazil. In 2013 I started at the university in Brazil and originally I planned to finish in 2018. However, I got some great opportunities during my studies that I had to go for. Halfway through my studies I was able to go to France for an 1 year internship. To do this I had to pause my Brazilian studies. In France I learnt about the school Mines Paris Tech and when I got back to Brazil I applied for this school where I was approved after a general test and interview. When I finish my education I will have a double master degree, one in France and one in Brazil.

What are your main interests and what directions have you chosen in your education?

When I first stated at the university in Brazil I studied mechatronics, but during a summer job in a Brazilian company I realized that computer science was an even more interesting field for me. When I applied to the internship in France I was able to chose computer science.

What about outside school, what do you like to do? I’ve understood that you are learning to play piano.

Yes, I’m learning the piano now. By chance my housing in Norway had a piano when I arrived. I’ve though about learning to play an instrument before and now I had the chance. At youtube I found an online course that I follow.

Are you the typical millennial, where youtube is one of the main sources of information?

Haha! Yes, that is true. I spend a lot of time on youtube and learn very much there.

How did you hear about Kelda, and what made you want to come here?

The first I heard from Kelda was through an association at school, where Kelda is a partner. I got a t-shirt from them with the Kelda logo on. Later, Kelda had a presentation at our school. I didn’t have the chance to go but heard of the Company from some other students. I decided to apply for an internship at Kelda after getting an email from a former Kelda intern. In the interview process, I got really interested and I had no doubt that Kelda was the right choice for an internship.

Your main task at Kelda was to design the add-on to Bivrost. This add-on we’ve come to call Mivrost. How has the work process been?

This is the first time I did such a complete work process. Kelda didn’t pose a specific solution so I had the opportunity to design the solution myself. I started planning and through discussions with Kelda employees we decided what was needed. The process was successful, but we didn’t achieve the final goal which was to use an automated machine learning algorithm to analyze and tag field operations.

Our impression of you is that you’re extremely organized and a very good planner. Are these skills something you focus on, or does it come more natural to you?

In general it comes natural to me. I usually plan in advance because it makes my work easier and more efficient. I fear to forget stuff, therefore I make notes. When these notes get messy I try to organize them and then I end up with a plan.

Do you feel that your ideas and suggestions are taken into account in the product development?

Definitively yes. Especially within the Bivrost team and when we were many people we had the chance to have good discussions. I also though the sprint reviews and retrospects were really good because they offered a proper space and time to discuss progress and process that is not that easy to discuss every day.

The last weeks of your internship you have spent a lot of time and effort to share your knowledge and teaching the new Bivrost team about the product. How did you plan this process and how has it gone?

I knew in advance that it would be my responsibility to pass the knowledge. I noticed what could be better from the beginning (In my own learning phase). To improve this I created som ‘proof of concept’ (POC) tasks that is really good to ensure that you learn things correctly, for instance using the correct frameworks.

Another this we realized is that doing code reviews are really good. I made the new Bivrost team present the already existing code. This forced them to really make an effort learning and understanding the code.

Thanks for taking the time to talk to the Kelda Blog editorial office. Before we let you go, can you tell us a little bit about what you plan for your next internship?

I will go to a company in New York called Data Dog. I heard about it at the same time I heard about Kelda.

On a side note, what do you think of the Norwegian winter?

Actually, this is the best winter I’ve experienced in Europe! For the first time I really enjoyed the winter. It is very cool to have snow.

From Minchester to Kelda Vikings

After two years of playing in the famous, outstanding, awesome Mines ParisTech’s football team, Minchester Paris, I was quite disappointed to leave to Norway… Will I be able to find a place to play there?

I knew that Norwegians were quite interested in football, and despite the fact that their national team is not among Europe’s best ones, I hoped to find there a good place to practice. And the least I can say is that I was not disappointed! Football is almost a religion here, even more than in France I would say. In every tiny town or village you are sure to find a perfect pitch, most of the time with artificial grass, and children playing on it! It is also much more mixed than in France, and a lot of young girls play football as their main sport.

Thus, trying to find a team to play with was one of the first thing I did after arriving in Norway. Football is everywhere in Norway… what about in Porsgrunn then? There are actually a lot of clubs around, and among them ODD in Skien, in the top division. Then I started to write emails to different clubs… After a first refusal from Pors Grenland Fotball (“Unfortunately, we have a full squad for 2017”, true story) I contacted Urræd, another club in Porsgrunn, and had a first training with their U19 (under 19 years old) team. To be honest, their level was a bit higher than the one we had in Minchester ^^ Then the coach told me that for the first time he planned to create a student team with the university, and that I was very welcome to join them. However today, six months later, I am still waiting for this team to be born!

Where to play then? I joined several times people just playing for fun on weekends, but I was looking for real matches and competition… That is when I discovered the Kelda Vikings.

Kelda Vikings!

Kelda Vikings is Kelda’s football team formed by at least 15, 20 players and among them… only one person actually working at Kelda ^^ Glenn-Ole created this team with friends a few years ago and from then a lot of new players have joined the team: friends, relatives, colleagues, interns… We play in a summer league in summer and a winter league in winter (you still follow me, right?), and have indoor trainings (almost!) every week. Summer is 7vs7 matches and winter 5vs5, indoor (just like our French UrbanFootball).

I did not really know how people played in these leagues before joining the team, and I was actually quite surprised! The level is quite high and the game pretty tough and physical, especially for me ^^ That is definitely a different way of playing from Minchester: on small fields everything is quicker, and you have to be really organized as a team to handle both defensive and attacking phases during the whole match…

At office: books, thesis… and football cups!

But that’s what Kelda Vikings are able to do! That was really amazing to join a team where people know each other, know how to play as a team… That gave nice moves, goals and results! Indeed, despite our 40 years old average age we beat most of the times teams of 25, 30 years old guys, and won the summer league title (second division, but still!). And it is always exciting to play with a guy that remembers playing against John Carew in Norway’s junior cup…

Playing in that team was definitely amazing, and I really looked forward to Wednesdays and Thursdays to join the Kelda Vikings for a game or training. If you ever work in Kelda, do not make the mistake to try rugby with Porgsrunn Pirates, join Kelda football team instead! 😉

Clic, clac, merci Kodak !

(About the title: it was the motto of Kodak, a manufacturer of argentic cameras, “clic clac” was the sound of the shutter when you took a picture)

You may know it (mostly because I have told you), but one of my main hobbies is photography. I would not qualify myself as a professional photographer, but rather as an amateur with a bit of experience.

My father was very interested in photography, and he always took a camera whenever we were leaving on vacation, and this is how I landed my hands on a camera for the first time. I thought it was fun to take pictures and then to show them to others.

When I was younger, my mother used to buy us, me and my brother, disposable cameras when we left for summer camps. They were not very sophisticated, but it was more than enough for a 9-year-old to register memories of a three-week camp. We used to send the best pictures to our grandparents, to show them how awesome was our stay, and to show them our new (sadly temporary) friends during the summer.

As I grew older, I could start to use my father’s camera, a Nikon D70, who was, at the time, one of the best performing DLSR from Nikon, and he came out relatively cheap, if you compared it to other reflexes of the same quality. And with it, he had three objectives: the regular one, sold with the body of the camera, a tele objective (with a focal 70-220, which corresponds to a zoom up to x7), and a wide-angle objective with which you cannot zoom, but distorts a bit the image (giving a “fish-eye” impression). I really enjoyed playing with the three objectives, but my father thought it was not very handy, and eventually, I ended up carrying the whole bag and taking all the pictures alone, and it was quite fun!

But at that time, I did know very few about photography, and I used to shoot all my pictures in full auto mode (which a lot of photographers consider a heresy, especially with a camera like the one I was carrying). And then, in 2010, I went to Canada. My father had since sold the big DSLR to opt for a small numeric camera from Panasonic, very light, and I had the right to take it with me in the other side of the Atlantic Ocean. I was really impatient, because the landscapes in Canada are really beautiful (and in some places, look a bit like Norway!), and since I was in a camp working hand in hand with the Office of Forestry in Quebec, I would have the opportunity to take pictures of the wildlife! There, one of the organizers of the camp knew some things about photography, and he taught me how to make a better use of my camera, by using the manual mode. What’s the difference, you’ll ask? Huge.

To understand it, let’s make a small explanation on how the camera works. Basically, it is a series of mirrors, with at the end, a captor that collects the light from the source. This captor is hidden by a mirror, and this mirror guides the light towards the viewfinder of the camera through a prism (that flips the image so that we can see through the viewfinder). Before this mirror, there is a complex system of lenses, the objective, that allow the optical zoom, and there is a diaphragm, that controls the quantity of light going through it. Once we have all these pieces, we can talk about the three “biggest” parameters you play with a camera:

  • The aperture of the diaphragm. This controls the depth of field of the photo: if you want to only have the object in the foreground to be sharp, and the rest of the field to be blurred, you’ll go for a small aperture. In contrary, if you want to have all of your photo to be sharp, you have to choose a great aperture. The second thing the aperture decides is the brightness of the photograph: a small aperture will make a bright photograph; a great aperture will make for a darker one.
  • The shutter speed. When you press the button on your camera, you won’t see anything through the viewfinder for a fraction of a second (on DSLR only). During this moment, the mirror in front of the captor will rise, letting light reach it, and actually taking the picture. The time the mirror is risen is the shutter speed. It mainly influences the brightness of the photograph: with small speeds, you’ll have bright photograph, but if you are shooting a moving target, you may as well get motion blur, so you have to take care! Higher speeds will make for darker pictures.
  • The sensibility of the captor. This also decides the brightness of the pictures (it is defined in ISO numbers, usually going in a scale of powers of 2). The higher the number, the brighter the picture, but it can lead to noise if the captor is not well-factored.

When you take a picture in full auto-mode, the camera takes the point it uses to make the auto-focus and sets it as the “point zero” for the brightness, and plays with all the parameters above to make it so this point is at a certain level of luminosity. It is easy, but not very pleasing: you are not really taking the picture, you are telling your camera to do so. So, in Canada, I started to play with these different parameters… and often messing them up, ending up in too bright or too dark, or even blurred photographs. But I had lots of fun taking them and that is what’s important.

After some time, I lost interest in photography, and I started my preparatory classes, so I didn’t really have time for hobbies. And I entered Mines ParisTech. There, we have an association dedicated to covering the events of our student’s life, and they have some gear to do it: a DSLR, two other video cameras and a GoPro. Little by little, I came back to taking pictures, and my father had bought a newer camera, a bridge (a hybrid between a numeric camera and a DSLR: it works the same as a DSLR, but there is no mirror nor prism, light reaches directly the captor and you have a live view in the viewfinder, like a video camera) from Sony. So, I took it with me in French Guyana last February, and I found back the feelings I had in Canada, but now with a bit more experience and knowledge. And I also started to use a software to edit my pictures. It seems strange at first, but taking the pictures with the right settings is approximately 75% of the work. When the picture is saved in your SD card, it is using the parameters of the captor, on which you have little to no margin of maneuver. So, treating the picture after taking it is a way to have this margin. And it can also make for some of the mistakes you made when taking the picture (too bright, too dark, wrong framing, …)!

And after this, I use my trips all around Europe (Vienna, Saint-Petersburg, Amsterdam, Brussels and finally Norway) to take lots and lots of pictures (I have approximately 50 GB of pictures in my laptop currently!). When I knew I was going to Norway, I started to look if I could not by my own DSLR and give back his camera to my father (since le last time he saw it was 6 months before!). And I finally got my hands on a Nikon D7200, which is a midrange DSLR, good for experienced amateurs, but not a pro camera (since the price gap is nearly 1000$ from midrange to pro cameras). With it, rather than taking the Nikon objective sold with it (who suffer from design problems and have a lot of distortion and sometime chromatic aberration), I opted for an objective from Tamron, 24-70mm (x3 zoom), and most importantly, with a constant aperture (when you zoom, the minimum aperture of an objective tends to increase mechanically, it requires a special type of mechanism to allow a constant aperture, whichever focal length you use, and it becomes possible to make macro-photography – taking pictures of small things with a lot of detail) On top of it, I put a polarizing filter, to be able to decide whether or not the reflection on water of windows appear in the picture.

That’s it for the historic/technic part. Now, for the reasons I like photography. It really struck me when I first was in Guyana, but when I go in a foreign country, I like to see and to understand how people live there, what they are experiencing in their everyday life, what is their environment and what do they see. And this I what I try to express through the pictures I take: to capture a moment, an emotion of everyday life in the city I’m in, or simply, something I saw in a glimpse and that I find funny or interesting. For these reasons, I take very rarely pictures of monuments: a lot of people have taken pictures of them, that are surely better than the one I would have taken. But I’m sure that nobody took the picture of the snack seller right next to it, who is currently cooking, with the steam nearly hiding him.

When it comes to taking pictures of people, I really prefer them not to look at the camera. The posture we adapt when we know we’re being photographed is not natural at all: the smiles are (a bit) forced, we feel a bit ill-at-ease, whereas if I do not tell people they’re being photographed, I can capture something much more natural, ending up in a better picture.

Finally, I find that photography is something really particular, and I requires training, and even with training, few of the pictures I take are worth being saved : in Copenhagen, I took 1793 pictures in my whole 3-day trip (you read the figure well), and among them, I kept 26 that sum up what I felt in the city. And I the end, I find more and more that it changes the way I look at things, at people, cities, landscapes, always looking for the small details, the things you do not see at the first glimpse. And this is what I find cool!

If you want to get a sample of some of my pictures, you can go > HERE <

 

A day of hiking in Seljord

On Saturday, July, 22nd, Pierre-Étienne, Thomas, Yoënn and I decided to to go on a hike in Skorve, near Seljord. The site visittelemark.no promoted a “challenging hike” with “great views” and the possibility to see a plane wreck from the 2nd World War. A great day in perspective.

On the 21st of July, I came and picked up the keys to our rental car in the Hertz concession, in Hovensgata : a silver grey Golf, all equipped, perfect to guide us to our destination. On the Saturday morning, we all gathered in the parking of the Rema in Hovenga Center at 10 AM, joined by Matthieu, one of our friends currently doing his internship in Oslo. After shopping what we needed for lunch, we headed right to Seljord, at approximately 95 km Northwest from Porsgrunn. In the car, the playlist was playing some rock while we were discussing of how our internships were going and remembering the mess that was our residence back in Paris.

After 1 hour and 30 minutes of driving, we finally see Seljord, boarding the Seljordvatn, a huge lake. The water was very still, giving the impression of a mirror in which the landscape was reflecting. We entered the town and started to head towards the beginning of the hiking trail, following a very narrow road in the forest, to finally stop in a small parking lot. After we took our bags, we finally started the hike.

The beginning of the trail was extremely steep, consisting in a trail of sand and gravel going uphill for approximately 700 meters, changing after this in a small trail in a forest area. After one hour of walking, we arrived in a small glade where with a small house – a shelter for hikers that wanted to camp here. We decided to eat there (it was already 13:30 and we were famished !). At the menu : bread, egg salad, meat, some crisps and as a dessert, bananas (a regular lunch at Kelda !).

We continued our way uphill through a very small path, with few indications. Every 100 meters, a red mark reminded us that we were on the right way up. We stopped several times to enjoy the view on the Seljordvatn, which is absolutely stunning from the heights, and we kept on walking until a crossroads. We had the choice : on the left, we could go and see the “Flyvrak”, the plane wreck, but it was only a one-way path and we had to turn our back once arrived there, and on the right the path to the tip of the Goysen, the highest mountain of the area, at 1370 m. After a small consultation, we decided to head to the Flyvrak – it was still early in the afternoon, and we would decide what to do next.

The Seljordvatn

The path to the Flyvrak was not very steep, and we could enjoy the landscape, which was made of plains with some small ponds and streams. After half an hour, we started to spot several pieces of the plane, and finally, the small plate commemorating the event, right next to the plane wreck. We had to chose what to do next : either we could turn our backs and go to the Goysen, or, like the adventurers we are, we could go off the paths and try to join back the trail later, exploring the area.

 

The remains of the B-24

As true Kelda Vikings, that is what we decided to do, and we started to climb uphill to see what the area had to offer. We climbed, we stopped to enjoy the view, we kept on climbing, and at some moment, the vegetation became sparser and we arrived in a rocky environment, meaning we were closer to the heights. After a last part of “climbing”, we finally see the altitude lakes that we saw on the pictures of the hike : good news ! And finally, the red marks, that we lost quite some time ago, showing us which way to go. We start to follow the trail, enjoying the sun, that finally decided to show up. After an hour or so, we saw a small path going to the top of the Nordnibba, one of the peaks of the trail. Since it started to become late, and we wanted to finish the circuit, we decided to keep on walking and not go on top of it.

The lakes on top of the Skorve

At this moment, we lost (once again) the trail, and we started going downhill, trying to find back the path, but unsuccessfully. After some time we ended up quite down the mountains, without finding back the trail. We saw something that looked like a path, on the other side of the valley, quite far from where we were – and where we parked the car, so we decided to climb back the mountain to join back the beginning of the trail. And it was here that things became a bit tricky : we were far from the trail (actually we didn’t see anything that looked like it from where we were), on the mountainside, which was quite steep. Yoënn went first scouting to see if we could find a path that was passable. The one he found was “okay-ish” (on his own words), and with Thomas and Matthieu, we decided to climb uphill to find another way around the mountain. At some point, we lost contact with Thomas and Pierre-Étienne (who decided to follow Yoënn), and with Matthieu, we climbed straightforward to the top, to get a better view of our comrades. After half an hour of steep climbing, we reached the top of the mountain, where we could see Yoënn and Thomas, waiting for us in the distance, quite below where we were, and Pierre-Étienne, who was below them and trying to climb back. We shouted at them, Thomas and Yoënn saw us, but not Pierre-Étienne, deafened by the wind and the echo. After some time, we lost eye contact with him, and kept on trying to join Thomas and Yoënn, who were sitting on rocks, near a small path.

When we finally joined them, we still had to find Pierre-Étienne, who was nowhere to be seen. Yoënn turn back on his steps to see if he was stuck downhill while Thomas, Matthieu and I were shouting his name to see if he was not further on the trail. After half an hour of searching, we finally found him, waiting for us not far from one of the lakes we previously saw. After everybody gathered, we understood that we were back exactly where we were three hours earlier, and we decided to climb down the mountain, to the parking lot. Near the plane wreck, we ate some raspberry cake to get our forces back and finally, finished the hike to get back to the rental car, waiting for us where we left it.

Then, we headed straight to Porsgrunn, the car was quiet, everybody was resting from the day, and we could enjoy the view of the warm color of the sunset on the Seljordvatn and the cliffs around it, as we left Seljord.

Back to Porsgrunn, we ordered some pizza and ate it near the river, not far from Pierre-Étienne’s, gave back the keys of the rental, and headed straight to our beds, tired after this long day.

To sum up, the trail was approximately 14 kilometers long and meant to be done in 7 hours, 8 if we took our time. It took us nearly 9 hours, we did about half of it, but we enjoyed some great views of the valleys of Seljord, and we blazed our own trail, as true Kelda Vikings !

Rugby match in Stavanger

On the 24th of June, Michael went to Stavanger with the Porsgrunn Pirates, the local rugby league team, for a match against the Stavanger Storm. The Storm are the champion of Norway in Rugby Union (XV players) and are playing (and dominating) their first season in Rugby League (XIII players) with the same players. Their team got some international players from Australia, Fidji or Samoa, including some former professional and Nick “The Honey Badger” Cummins, the wing from the Australian national team, and his brother. Thus, the challenge was huge !

The match was furious but after dominating the first half time, two players from Porsgrunn got injured, the rest of the team began to be exhausted, the Pirates were defeated by the storm in an intense second half time. A side-step of Michael in the last 22 meters was at the origin of one of the Pirate’s try in second half time !

 

 

As Rugby is a story of fighting with friends, the match was followed by a barbecue. In the evening, the third half time, at the Beverly, a sport bar in Stavanger, supported by the Storm’s sponsors, was crazy and last until the morning…

A great experience with really friendly people. The rematch will happened the 2nd of september !!