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aries1988 : model   15

CFD and others...: Sub-grid Scale (SGS) Stress Models in Large Eddy Simulation
the role of the SGS model, in the above scenario, was to stabilize the simulation by adding numerical dissipation.
For numerical methods which have natural dissipation at high-wave numbers, such as the DG, SD or FR/CPR methods, or methods with spatial filtering, the SGS model can damage the solution quality because this extra dissipation is not needed for stability.
LES  model  opinion 
4 weeks ago by aries1988
Robert Merton and the effect of time on portfolio choice - Buttonwood
Say, a young person’s human capital, which determines his future earnings, is 90% of
his lifetime wealth, with the balance in stocks. And say that for an almost-retired
person the proportions are reversed. If the stockmarket crashes by 40%, the young
person has lost only 4% of his wealth. But the nearly retired person has lost 36%,
which is much more serious. For older people, having all their financial wealth in
stocks is not a sensible risk to take, says Mr Merton. Human capital is low-risk. If you
have lots of it, you can take more financial risk.
investment  finance  age  youth  model  economist 
june 2019 by aries1988
Finding Lena, the Patron Saint of JPEGs

About six months later, a copy of the issue turned up at the University of Southern California’s Signal and Image Processing Institute, where Alexander Sawchuk and his team happened to be looking for a new photograph against which to test their latest compression algorithm—the math that would make unwieldy image files manageable. Lena’s glossy centerfold, with its complex mixture of colors and textures, was the perfect candidate. They tore off the top third of the spread, ran it through a set of analog-to-digital converters, and saved the resulting 512-line scan to their Hewlett-Packard 2100.

as she told me her life story, recalling her trips from America to Sweden, her marriages and jobs, the lives of her children and grandchildren, it became abundantly clear that the Playboy episode and its aftermath is a curious footnote, a part of her life that she has been largely excluded from, if only because no one thought to tell her very much about it.
controversy  female  technology  image  computer  history  model  story  sweden 
february 2019 by aries1988
Letter of Recommendation Schleich Figurines
the same name — “Schleich” — in minuscule lettering. Just below were the words “Schwäbisch Gmünd,” a little town in southern Germany, I soon learned, where the 83-year-old company makes many of these beguilingly lifelike beings
toy  moi  animal  africa  childhood  model  daily  table  home  decoration 
march 2018 by aries1988
Cities Aren't Smart Enough to Stop Rat Infestations. But That's About to Change.

To start, the team turns to the city’s records on 311 calls about rodent sightings—for now, that’s the most reliable insight for finding rodent hotspots. Then they compare those calls with other city data, including the number of registered businesses (particularly food businesses), apartments (an indication of human density), and the breakdown of the area’s landscape (concrete versus penetrable Earth like parks). They’re looking for patterns that signal favorable conditions for rats, highlighting places where Brown’s team could soon find an infestation.

The result was impressive: Neill’s model could predict a spike in rodent complaints a full week before it happened
model  city  rat  hygiene  management  animal 
august 2017 by aries1988
Miniatur Wunderland *** official video *** largest model railway / railroad of the world
The official video about Miniatur Wunderland Hamburg, the largest model railway in the world, and one of the most successful tourist attractions in Germany. ...
deutschland  idea  train  model  transport  airplane  fun  travel  museum  moi  germany 
december 2015 by aries1988
Catastrophic Chinese floods triggered by air pollution
Fan worries that such effects are not being taken into account in weather forecasting. In China, for example, she notices that forecasts often give the wrong area for thunderstorms, which are likely to be downwind of where expected. Such forecasts also get the intensity “worryingly wrong,” she says.
pollution  meteo  china  model  disaster 
july 2015 by aries1988
Bamboo Mathematicians
In the late 1960s, a species of bamboo called Phyllostachys bambusoides--commonly known as the Chinese Mainland Bamboo or Japanese Timber Bamboo--burst into flower. The species originated in China,...
biology  evolution  model  maths 
may 2015 by aries1988
La reine Alien se restaure à Lyon
Ce n'est certainement ni la première ni la dernière fois que la saga du xénomorphe fait l'objet d'un événement de ce type. Mais cet hommage lyonnais revêtait une saveur toute particulière, la cité rhodanienne abritant depuis septembre la maquette motorisée originale restaurée de la « Alien queen », la reine Alien géante imaginée par James Cameron pour Aliens : le retour en 1986.

Il obtient finalement la bête pour 40 000 dollars, soit 31 000 euros. Une broutille comparée à son coût de production estimé – 900 000 dollars – mais un prix non négligeable pour ce petit musée familial et privé, qui emprunte pour s'offrir le monstre sacré.

Au final, le musée s'en tire avec une facture de 120 000 euros de réparation, hors main-d'œuvre interne.
lyon  museum  movie  model 
november 2014 by aries1988
Sympathy for Japan, and Admiration
I find something noble and courageous in Japan’s resilience and perseverance, and it will be on display in the coming days. This will also be a time when the tight knit of Japan’s social fabric, its toughness and resilience, shine through. And my hunch is that the Japanese will, by and large, work together — something of a contrast to the polarization and bickering and dog-eat-dog model of politics now on display from Wisconsin to Washington. So maybe we can learn just a little bit from Japan. In short, our hearts go out to Japan, and we extend our deepest sympathy for the tragic quake. But also, our deepest admiration.
japan  model  zeitgeist  disaster  people  future 
march 2011 by aries1988

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