adilrasheed.com

Munkholmen

Jul 042010

When: 02.07.2010
With: Expat members
From: Ravnkloa http://www.trondheim.no/ravnkloa/ by boat

Munkholmen (Norwegian, meaning the monk’s islet) is an islet north of Trondheim, Norway in the Trondheimsfjord. The islet has served as a place of execution, a monastery, a fortress, prison, and a World War II anti-aircraft gun station. Today, Munkholmen is a popular tourist attraction and recreation site.

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Lianvatnet in Dry Pastel

Arts, Paintings in 2010 No Responses »

Jul 042010

Materials used: Soft Dry Pastels (Faber Castle and Sennelier)
Fixative: Perfix Colourless Fixative (Daler Rowney)
Surface: 160gm/m2, 29.7X42cm, Acid free (Tiziano)
Surface color: Grey
Sketching medium: 9B graphite pencil

I generally prefer a non-white surface when I am working with pastels. Having a background color tone midway between white and black helps in judging the color values much more easily and accurately.

Step 1: Sketch the outline of the lake with a 9B pencil.
Step 2: Color the areas which are dark in color. It is much easier to use lighter colors in the end during the final phase. In this painting i used different shades of blue to paint the blue part of the sky. Similarly I painted the darker trees and bushes on the horizon. The lakes was painted next to show the reflections of the sky and trees. Finally the shades due to long grass in the foreground was painted. Light and bright colors were intentionally avoided at this stage.
Step 3: Even darker shades were used on the sky, lake and foreground areas. The colors were then blended lightly with fingers. One can also use tissue papers but I like to get dirty with paints. They are no more too toxic
Step 4: The effects generated at the last step were fixed by spraying fixative over it. For this the painting was laid on a horizontal surface and the fixative was sprayed from a distance of about 1m. Spraying from closer distance might blow off the dry pastel dusts. I wanted them to stick to the painting. Also make sure to do it outdoor and do not inhale the fixative. It is not a good idea to get drunk mid way and you might need hours to regain consciousness
Step 5: Sharp edged bright colors along with carefully chosen warm dark colors were used to create the shapes of grass and cloud.
Step 6: Fixative was once again sprayed.
Step 7: I have invented the best way of preserving a pastel painting: laminate them and they will last for ever

Hope you will enjoy painting. Also check out the video section of this website. I sometime film the painting process. Unfortunately I do not speak much while painting so a commentary is always missing but you can learn a lot just by watching.

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Lian to Skistua

Travel No Responses »

Jul 022010

When: 19.06.2010
With: Nikon D80, 10-20mm Nikkor
By: To Lian by Tram no. 1 from
I missed the last bus (no. 10) from Skistua and had to walk additional 4km. The last bus from Skistua is around 16:15.

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Terrain-Induced Turbulence prediction for Aviation Safety

Research No Responses »

Jun 292010

For live turbulence report for Norwegian airports log on to: https://www.ippc.no/ippc/index.jsp
Acknowledgements: I am thankful to Viel Ødegaard and Knut Helge Midtbø from Norwegian Meteorological Office and Erling Bergersen from Avinor for their comments and suggestions in the compilation of this presentation and the corresponding reports.

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Norwegian Constitution Day

Trondheim No Responses »

May 172010

The Constitution of Norway was signed at Eidsvoll on May 17 in the year 1814. The constitution declared Norway to be an independent nation.

Children Parade: A noteworthy aspect of the Norwegian Constitution Day is its very non-military nature. All over Norway, children’s parades with an abundance of flags form the central elements of the celebration. Each elementary school district arranges its own parade[1] with marching bands between schools. The parade takes the children through the community, often making stops at homes of senior citizens, war memorials, etc.

The graduating class from the Norwegian equivalent of high school – known as russ – has its own celebration on May 17, staying up all night and making the rounds through the community. The russ also have their own parades later in the day, usually around 4 or 5 PM. In this parade, russ will parade through the street with their russebiler carrying signs and pickets.

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Hiking to Lake Teisendammen

Bymarka, Trondheim No Responses »

May 162010

View Teisendammen in a larger map

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The Lade Trail

Bymarka, Trondheim No Responses »

May 162010

View Trondheim walk in a larger map

With: Kamal, Yoga, Nokin D80, 18-70mm Nikkor, 10-20mm Sigma
From: Eidsvollsgt- 16 to Lade’
Difficulty level: Easy
The Ladestien (Lade trail) runs from Ladehammeren to Rotvoll and offers a great outdoors experience in one of the most attractive areas in Trondheim. The numerous lovely inlets along the path are the result of the sea level being 175m lower today than at the end of the last ice age. As the ice-sheets have disappeared, the land has risen. This footpath gives the earliest signs of spring in Trondheim. The willows flower as early as February. Alder and hazel also bud early. Standing on their own hills by the Lade footpath are Lade Farm, Ringve Farm and Østmarka Farm, set in a hilly landscape which rises to over 70m above the sea. Along the footpath there are many reminders of the war; the remains of underground caves, gun position foundations and bunkers. At Østmarksbukta there is a cave blasted 100 meters into the hillside.

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Granåsan to Gråkallen

Bymarka, Trondheim No Responses »

May 162010

View Larger Map
With: Bernhard, Rubela, Nikon D80, 18-70mm
Where to start from: Granåsan
Take bus no. 19 form D4 (Drimmingansgate) to Granåsan
Difficulty: Medium

Gråkallen is a mountain in Bymarka, close to Trondheim, Norway. The summit is covered by an abandoned fenced military installation. Below the summit (on the cole to the right of the summit above the lake) there is a ski station where buses from Trondheim will set you down. The first element is grå ‘grey’, the last element is the finite form of kall m ‘old man’. (It is common in Norway to compare mountains with old men.)

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Terrain induced turbulence prediction at Værnes airport

Research No Responses »

May 012010

Variation of the square root of turbulent kinetic energy at the Værnes airport along the flight path

HOW NORWEGIANS AIRPORTS ARE DIFFERENT FROM OTHER EUROPEAN AIRPORTS ?
Norway is one of the world’s most northerly countries, and one of Europe’s most mountainous countries with large areas dominated by the Scandinavian Mountains. Average elevation is 460 m and 32% of the mainland is located above the tree line. The country is also characterized by fjords penetrating deep into country’s mainland. Because of its peculiar terrain most of the airports are located near a fjord or in valleys. Look at the pictures below. Compared to Amsterdam airport (right) which is located on a flat terrain, the Norwegian airports like Forde are surrounded by water and hills. The irregular terrain generates intense turbulence near the airport and poses real danger to the flights operating in the region. There have been incidents on one of the airports where the plane went of the run way because of the turbulence. Avoiding such turbulent conditions require accurate forecast of turbulence in the vicinity of the airport. Applied Mathematics group in SINTEF ICT have developed a geophysical flow modeling tool called SIMRA which is coupled to the Norwegian Weather Forecasting model and gives the hourly prediction of turbulence and updates the results on www.ipcc.no. Presently the model is operating on 12 Norwegian airports. So, next time when you travel do not forget to visit this website. You will have a fair idea of the turbulence you will expect.

Left: Forde, Right: CDF, Paris airport

Here I am giving a demonstration of the tool. Since, I live in Trondheim I have taken the Værnes airport as the test case. You can see in the figure below that it is a “typical” Norwegian airport surrounded by hills and water.

Værnes Airport

GOVERNING EQUATIONS

Digitalized Terrain data for Værnes Airport

Mass Conservation Equation:         $\nabla\cdot(\rho_{s} \mathbf u)=0$
Momentum Conservation Equation: $\frac{D \mathbf u}{Dt}=-\nabla \left(\frac{p_{d}}{\rho_{s}} \right)+g\frac{\theta_{d}}{\theta_{s}}+\frac{1}{\rho_{s}}\nabla\cdot\mathbf R + \mathbf f$
Energy Conservation Equation:    $\frac{D \theta}{Dt}=\nabla\cdot(\gamma_{T} \nabla \theta)+q$
TKE Equation:                                 $\frac{D K}{Dt}=\nabla\cdot(\nu_{T} \nabla K)+P_{k}+G_{\theta}-\epsilon$
EDR Equation:                                 $\frac{D \epsilon}{Dt}=\nabla\cdot\left( \frac{\nu_{T}}{\sigma_{e}} \nabla \epsilon \right) +(C_{1}P_{k}+C_{3}G_{\theta})\frac{\epsilon}{k}-C_{2}\frac{\epsilon^{2}}{k}$

SAFETY FACTOR
The simplest meteorological variable considered most important for aviation safety is called the F-factor or wind shear and what is called turbulence, represented by $\epsilon^{1/3}$ . These quantities are given by the following equations:

F-factor: $F=-\overline{\frac{c}{g}\frac{\partial u}{\partial x}+\frac{w}{c}}^{\ell_{f}}=-\frac{c}{g \ell_{f}}[u(x+\ell_{f}/2-u(x-\ell_{f}/2)t]+\frac{\overline{w}^{\ell_{f}}}{c}$
Turbulence: $\epsilon^{1/3}\approx \left(\frac{(C_{\mu}^{1/2}K)^{3/2}}{\ell_{t}}\right)^{1/3}\approx0.67K^{1/2}\ell_{t}^{-1/3}$

Here c is the fly path, g is the acceleration due to gravity, u is the wind component along the fly path, w is the vertical wind component, $\epsilon$ is the turbulent dissipation, K is turbulent kinetic energy, $\ell_{t}$ turbulent length scale and $\ell_{f}$ is the minimum response distance for landing configuration and is of the order of $\sim 500\,m$ , which corresponds to a time interval of about $t=O(7\,s)$ . Averaging over this distance is indicated by the overline. Coefficient $C_{\mu}$ is given by $C_{\mu}\approx 0.09$ .

Prevalence of the two conditions $F<-0.1$ and $\epsilon^{1/3}>0.5\,m^{2/3}s^{-1}$ correspond to severe turbulence for commercial aircrafts and represent potential danger. These conditions are easily met when $\sqrt{K}>3\,ms^{-1}$ .