The radiation from small amplitude waves on straight strings is calculated. The result is applied to a string with colliding kinks, and the power spectrum and total power obtained. The rate of rounding of the kinks due to gravitational damping is found, which enables one to show that the backreaction causes the average separation between kinks on infinite strings to scale with the horizon in an expanding universe.
Dec 26 (Reuters) â SpaceX Chief Executive Elon Musk said on Monday that the company is now close to having 100 active Starlinks, the firmâs satellite internet service, in Iran, three months after he tweeted he would activate the service there amid protests around the Islamic country.
Musk said, âapproaching 100 starlinks active in Iranâ, in a tweet on Monday.
The billionaire had said in September that he would activate Starlink in Iran as part of a U.S.-backed effort âto advance internet freedom and the free flow of informationâ to Iranians.
Trans-light speed vessels should give off gravitational waves.
This discovery confirmed a prediction made a century before by Einstein and his Theory of General Relativity and opened the door to a whole new field of astrophysical research.
We all lead busy lives, and it can be hard to remember to eat healthy. Sometimes, itâs easier to just grab food off the shelf, thinking only of the convenience and not of the nutritional value. Processed foods are always on-hand, and theyâve saved us time and energy in the past. But, at what cost?
Many of the products on this list are staples of our daily diet. However, if not eaten in strict moderation (or avoided completely) they can lead to long-term health problems. Some of these products are clearly harmful, but others seem like healthy foods, only to be proven unhealthy when itâs too late. After looking at this list, you might want to reconsider what you put on your shopping list.
Jeff Lichtman is Jeremy R. Knowles Professor of Molecular and Cellular Biology at Harvard. He received an A.B. from Bowdoin (1973), and an M.D. and Ph.D. from Washington University in St. Louis (1980) where he worked for 30 years before moving to Cambridge (2004). He is a member of Harvardâs newly established Center for Brain Science. Jeffâs research interests revolve around the question of how mammalian brain circuits are physically altered by experiences, especially in early life. He has focused on the dramatic re-wiring of neural connections in early postnatal development. More recently his research has focused on developing new electron microscopy methods to map the entire wiring diagram of the developing and adult brain. One of the principal aims of this âconnectomicsâ approach is to uncover the ways information is stored in neural networks.
In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)
David C. Van Essen is the Alumni Endowed Professor in the Anatomy & Neurobiology Department at Washington University in St. Louis. He has pioneered the use of surface-based analysis methods to characterize the structure, function, development, and connectivity of the cerebral cortex. He is Principal Investigator for the NIH Human Connectome Project, a large-scale effort to map brain circuitry and its relationship to behavior in healthy adults. His physiological and anatomical studies have provided deep insights into cortical functional organization. He has served as Editor-in-Chief of the Journal of Neuroscience, President of the Society for Neuroscience, and Head of the Anatomy & Neurobiology Department for 20 years. He is a fellow of the AAAS and received the Raven Lifetime Achievement Award from the St. Louis Academy of Sciences and the Krieg Cortical Discoverer Award from the Cajal Club.
In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)
In this episode, Emad and Peter discuss everything from AI-generated content and property rights to ethical implications, along with the upcoming hyper-disruption wave of technology in all industries.
Emad Mostaque is the CEO and Co-Founder of Stability AI, a company funding the development of open-source music-and image-generating systems such as Dance Diffusion and Stable Diffusion.
