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PI: Parviz Moin, Stanford University
This project aims to demonstrate that LES of complex geometries at flight Reynolds numbers is possible with today’s large-scale computers, which is a crucial step toward extended use of LES in transportation and power industries.
This image illustrates detailed simulation inside a flow control device. The main jet oscillates between the upper and lower outputs (separated by a triangular block in this cross-section); contours of streamwise velocity are shown. Actual aircraft will have dozens of these ports installed along the tail and wings for control.
Image credit: J. Kim, Center for Turbulence Research, Stanford University
Scientific discipline: Engineering
This research used resources of the Argonne Leadership Computing Facility at Argonne National Laboratory.
Sensors are critical for both everyday technologies like smartphones and also for scientists studying tiny nanoparticle formations. Many sensors work by detecting extremely small vibrations, using a device called an oscillator. Argonne scientists are experimenting with new ways to make even tinier oscillators—many times smaller than the width of a human hair. As part of their work, they created this computer simulation showing how a miniscule gold core inside a silver shell changes with vibration.
Image courtesy Aftab Ahmed, Argonne National Laboratory
Details: Simulation of mechanical deformations of a 20-nm gold core inside a 50-nm silver shell as part of a study of nanoscale high frequency oscillators. (1 nanometer = about how much your fingernails grow in 1 second.) Research by Jeffrey Guest, Xiao-Min Lin, Aftab Ahmed, and Matthew Pelton.
A movie showing a snapshot from a Molecular Dynamics simulation of ethanol (the usual drinking alcohol; methanol, on the other hand is poisonous) interacting with (POPC) lipids. This movie showing how ethanol (blue and red) has hydrogen bonded with (POPC) lipids.
Details: the simulation is in explicit (SPC) water (removed from visualization for clarity). 90 ethanol molecules. Lipids (128 in total): POPC. Gromacs simulation engine.
Downloadble material for performing simulations at www.softsimu.org
See also:
- Ethanol interacting with a biomembrane
- Xenon molecules interacting with a lipid bilayer
References:
1. Under the influence of alcohol: The effect of ethanol and methanol on lipid bilayers. M. Patra, E. Salonen, E. Terama, I. Vattulainen, R. Faller, B.W. Lee, J. Holopainen, and M. Karttunen. Biophys. J. 90, 1121-1135 (2006). www.biophysj.org/cgi/content/abstract/90/4/1121
2. Structural effects of small molecules on phospholipid bilayers investigated by molecular simulations. B.W. Lee, R. Faller, A.K. Sum, I. Vattulainen, M. Patra, and M. Karttunen. Fluid Phase Equilibria 225, 63-68 (2004). dx.doi.org/10.1016/j.fluid.2004.07.008
3. Influence of Ethanol on Lipid Membranes: From Lateral Pressure Profiles to Dynamics and Partitioning,
E. Terämä, O.H.S. Ollilla, E. Salonen, A. Rowat, C. Trandum, Peter Westh, M. Patra, M. Karttunen, I. Vattulainen. J. Phys. Chem. B 112, 4131-4139 (2008). dx.doi.org/10.1021/jp0750811
Rosetta flight control team training at ESOC. Today's session simulates 5 May 2014, when a critical manoeuvre is planned.
Arizona Science Center, sound and light for simulation of a human heart replacement. This is actually a 1:1 model...
Hair Simulation : Letter A
Playing with hair simulations, these a little more abstract than the others.
Film Simulation Agfa Scala Monochrome
Film Simulation = Acros + G
Sharpness = 0
Shadows = 0
Highlights = +4
Grain = Weak
Noise Reduction = -3
Dynamic Range = DR400
White Balance = Auto
Color = n/a
ISO Auto (6400)
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Day 10 of the 2012 Advanced Science Course 'Around the World and Around the Clock: The Science and Technology of the CTBT'. Participants engaged in an On-site inspection table-top-exercise.
Windblown waves simulation | Exploratorium, San Francisco. | April 20, 2016 | Canon EOS 5D Mark III | ¹⁄₁₀₀₀ sec at f/1.4 400
Rosetta flight control team training at ESOC. Today's session simulates 5 May 2014, when a critical manoeuvre is planned.
Jon Wollenhaupt Photography
SandBox49 Studios
San Francisco
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...zatáčení také není složité... Nechtějte mi namluvit, že podzvuková stíhačka se řídí snadněji než ultraligt. Stačí, vrklat kniplem, pedály vůbec nejsou potřeba. Žádný skluz, nic... (za kniplem kolega pisálek Ivan Verner)
Mit einem Demonstrator können die Messebesucher das Antriebsystem des NGT LINK virtuell steuern.
Auf der weltweit größten Fachmesse für Bahn- und Verkehrstechnik in Berlin geben die Forscher des Deutschen Zentrums für Luft- und Raumfahrt (DLR) einen Einblick in aktuelle Forschungsprojekte, um den Schienenverkehr schneller, effizienter, sicherer und komfortabler zu machen.
Mehr Infos zum DLR auf der InnoTrans 2016: www.dlr.de/dlr/desktopdefault.aspx/tabid-10081/151_read-1...
Credit: DLR (CC-BY 3.0)
Rosetta flight control team training at ESOC. Today's session simulates 5 May 2014, when a critical manoeuvre is planned.
Kelly Hackman, left, a critical care technician at Penn State Health St. Joseph Medical Center, teaches intubation techniques to Cecily Ramirez, a medical student from Alvernia University, during a code blue simulation on Thursday, Feb. 24, 2022.
Georgetown University School of Foreign Service in Qatar held a conflict resolution and negotiation simulation titled “Afghanistan in 2015: Chaos in Kabul.” The simulation, organized in conjunction with Georgetown’s Institute for the Study of Diplomacy (ISD) in Washington, D.C., included 25 student participants from the Georgetown Qatar and D.C. campuses, the Academic Bridge Program, as well as local high school students. Canadian Head of Mission to Qatar, Gary Luton, played the role of UN Secretary General in the exercise.
“It’s always useful for practitioners to engage with students on important issues, and to hear their opinions on and reactions to some of the international community’s most vital concerns,” said Luton.
The exercise, a blend of real-world events and fictional elements that help facilitate learning objectives, was designed to help students think about and experience domestic and international efforts towards reconstruction and development after international military forces have pulled out of a country, the power struggle within Afghanistan in particular, and how the UN, foreign governments, the Afghan government, tribal leaders and the Taliban can interact constructively.
Students received a set of “confidential” instructions outlining each team’s initial position on developing a road map for Afghan reconstruction and development several days before the simulation began. During the simulation, students engaged in a series of bilateral and multilateral meetings which culminated in a final session presided by the UN Secretary General, played by the Canadian Head of Mission to Qatar, Gary Luton.
“The value of simulations for students studying international affairs, is that they get to immerse themselves in very difficult topics and learn about the subject matter. They then get to play the role of the people in the real world who are trying to do something about that crisis,” said Jim Seevers, the ISD’s Director of Studies and Training who created the exercise in conjunction with ISD Associate Lt. Colonel Mike Shortsleeve. “The students love the process of actually being the negotiator. When you’re being asked, not just to understand a subject, but to negotiate with a party that you know has a different view, you begin to see issues from different parties’ perspectives,” added Seevers.
During the exercise, students formed several teams representing the Islamic Republic of Afghanistan, the Taliban, the Islamic Republic of Iran, the Islamic Republic of Pakistan, the United States, the People’s Republic of China, and the U.N. Assistance Mission in Afghanistan. A “control room” of faculty and policy practitioners played the role of the Afghan Tribal Leaders and ISAF/NATO.
Ysa Chandna, a Georgetown University student, commented, “Crisis Simulation is perhaps the best thing at Georgetown University; this is my third time taking part in it and I’m very glad I did because I learned a lot from it.”.
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Ysa Chandna