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Thanks for allowing me to participate in the Emergence photo group and discussions. My contribution is not a photo, but a figure describing simulations from a recent paper. I have a lot of nature photos that show emergent patterns and I hope to share these with you, but I figured I would start with this material since it is a direct demonstration of emergence (loosely defined here as the creation of simple patterns from a complex set of rules).
You may be aware that amino acids, the building blocks of proteins in our body, share the same chirality or handedness of chemical structure. While it is unclear how this homochirality evolved out of a primordial mixture of left and right-handed amino acids, we know today that homochirality is an important component of regular secondary structures found in many proteins such as the alpha-helix, shown above, the beta-sheet and others.
However, there are a few cases where organisms will synthesize heterochiral peptides through special synthetic pathways - these often function as toxins or antimicrobials - because of their deviation from natural chemical structure - host defense mechanisms often cannot adapt to these chemicals.
The above figures show a simulation of a short 11-residue protein chain docking against an alpha helix. When a poly-alanine chain is allowed to vary both its conformation (bending, twisting) and the chirality of individual positions - the simulation consistently minimizes to a homochiral helix, either with a left handed twist or a right handed twist. This is amazing considering this is only one of 2^11 possible solutions.
Proteins are great examples of emergent structure. Evolution has tuned them to resolve a well defined structure quickly. It appears homochirality is one property that favors fast folding, stable proteins. Hence, homochirality seems to be an emergent property of protein evolution.
For more info, contact me, or see:
Nanda & DeGrado "Simulated Evolution of Emergent Chiral Structures in Polyalanine", Journal of the American Chemical Society, 2004
Nanda & DeGrado "Computational Design of Heterochiral Peptides Against a Helical Target", Journal of the American Chemical Society, 2006
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.
Tunis, Tunisia 16 October 2011
A simulation of vote was held in a school of Tunis with the aim of monitoring and verifying the mechanism of vote that will take place on October 23rd 2011.
It was organised by the ISIE (Instance Superieure Independante pour les Elections). The ISIE is an independent public institution with financial and administrative autonomy, and whose primary mission is to oversee the elections of the Constituent Assembly and to ensure democratic, pluralistic, fair and transparent elections.
www.europarl.europa.eu/en/headlines/content/20111014STO29...
Photo: Ezequiel Scagnetti
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.
Los Angeles Fire Department CERT (Community Emergency Response Team) Unit volunteers organized in Sylmar, CA to put their skills and abilities to the test. They conducted a simulation of a devastating earthquake that hits the San Fernando Valley, depleting first responding resources. CERT members from neighboring cities joined LAFD CERT members of our community to do "The Greatest Good for the Greatest Number of People." Search and Rescue K9s, LAFD UAVs, and over 120 CERT volunteers searched through the simulated disaster site of the Oakridge Mobile Home Community for residents in need of help. Utilizing their CERT training, these dedicated volunteers successfully organized CERT teams to conduct damage assessments, establish a medical treatment area, and extract trapped victims.
Photo Use Permitted via Creative Commons - Credit: LAFD Photo | Cody Weireter
Event Date: 030919
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College of DuPage health Sciences students participated in a multi-discipline simulation involving students currently in the College's EMT, Nursing, CT, Surgical Tech, Nuclear Medicine and Respiratory Care programs. The scenario, played out by a combination of actors and mannequins involved a domestic situation in which a husband shot his wife and two children leaped from a two-story window to avoid a fire.
Using high-performance computer-generated models, VERIFI researchers demonstrated that in gasoline compression ignition, varying the start of injection (SOI) timing produces significant differences in the reactivity of the the fuel mixture, delaying ignition. Such high-resolution modeling was made possible by optimizing the CONVERGE for parallel read/write processes.
The Sentinel 2a Mission Control Team in simulation training at ESOC on 28 April 2015. Liftoff is set for June 2015.
Formation aux employés de la Ville de Victoriaville sur la mise en place et la gestion d'un centre d'hébergement temporaire à l'école secondaire Le Boisé, en cas de crise ou d'urgence.
The roleplaying game 2300AD has a fairly elaborate planet generation system. This is the results of generating 10,000 planets in the inner, life and outer zones using the rules.
One of the surprises is the larger fraction of gas giants in the life zone compared to the outer zone. This occurs because they are more likely to get a heavy core than in the outer zone, where an ice core has a hard time getting enough gravity to attract a dense atmosphere.
I made a cut-off at 100,000 km diameter; the gas giants go all the way up to 500,000 km. That big giants would not actually have that radius, since the pressure would cause them to become denser. Their likely diameters are going to be Jupiter-like, around 133,000 km.
The Sentinel 2a Mission Control Team in simulation training at ESOC on 28 April 2015. Liftoff is set for June 2015.
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.
A global particle-in-cell simulation uses Weixing Wang's GTS code to show core turbulence in a Tokamak at Argonne National Laboratory.
Researchers are the Argonne Leadership Computing Facility to push fusion computer codes and associated algorithms closer to defining plasma confinement properties required to ignite the ITER experimental fusion reactor. The achievement is an important step toward developing a commercially viable, clean, limitless energy source. Image created by Scott Klasky, ORNL.
The Sentinel 2a Mission Control Team in simulation training at ESOC on 28 April 2015. Liftoff is set for June 2015.
Like any photographer, must define the objective in photography, in order to enjoy it more.
My special vision for some photos when i take it , reflects my mind and my imagination, such as the title up, or there may be different titles of each of watching such pictures.
The model : Mohammad Allanqawi.
Location : Al-Khairan Resort - Kuwait.
Simulation of Nature by khalid almasoud / © All rights reserved
Camera: Canon EOS 50D
Exposure: 0.004 sec (1/250)
Aperture: f/13
Focal Length: 10 mm
ISO Speed: 400
Exposure Bias: 0 EV
Flash: Flash fired
Exposure Program: Manual
Date and Time : 2008:12:11 14:19:11
Metering Mode: Pattern
Exposure Mode: Manual
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.
The Sentinel 2a Mission Control Team in simulation training at ESOC on 28 April 2015. Liftoff is set for June 2015.
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.
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.
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.
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.
PORTSMOUTH, Va. (Oct. 21, 2020) A U.S. Navy Corpsman assigned to Navy Medical Readiness and Training Command Portsmouth works through a trauma simulation in the Healthcare Simulation and Bioskills Training Center at Naval Medical Center Portsmouth October 21. The Center provides state of the art simulation-based medical training for US military, coalition forces and local medical community. US Navy photo by CDR Denver Applehans/Released.
20-0001-019 (201021-N-EY938-337)
Brig. Gen. Timothy Trainor, U.S. Military Academy Dean, portrays the president entering Congress to address the legislative branch on immigration reform. In his speech, the president asks both houses to reach an agreement which best reflect his vision on immigration or else he will use the power of veto. The Congressional Simulation Exercise on April 4 was designed to give about 120 West Point cadets in the SS202 and SS252 (American Politics) courses a hands-on, real-world simulation of government in action. Participants absorb the role of legislators, journalist, lobbyists and presidential advisers in a daylong capstone exercise to see who could best use political capital to create the best outcome for their group. Photo by Mike Strasser, West Point Public Affairs
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.
Argonne principal mechanical engineer Sibendu Som (left) and computational scientist Raymond Bair discuss combustion engine simulations conducted by the Virtual Engine Research Institute and Fuels Initiative (VERIFI). The initiative will be running massive simulations on Argonne’s Mira supercomputer to gain further insight into the inner workings of combustion engines.
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