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Propellantless propulsion with Electric solar wind sail for cheaper and faster space missions

Propellantless propulsion with Electric solar wind sail for cheaper and faster space missions | Tecnologia | Scoop.it

A paper analyses the potential of the electric solar wind sail for solar system space missions. Applications studied include fly-by missions to terrestrial planets (Venus, Mars and Phobos, Mercury) and asteroids, missions based on non-Keplerian orbits (orbits that can be maintained only by applying continuous propulsive force), one-way boosting to outer solar system, off-Lagrange point space weather forecasting and low-cost impactor probes for added science value to other missions. We also discuss the generic idea of data clippers (returning large volumes of high resolution scientific data from distant targets packed in memory chips) and possible exploitation of asteroid resources. Possible orbits were estimated by orbit calculations assuming circular and coplanar orbits for planets. Some particular challenge areas requiring further research work and related to some more ambitious mission scenarios are also identified and discussed.

The electric solar wind sail (E-sail) is an advanced concept for spacecraft propulsion, based on momentum transfer from the solar wind plasma stream, intercepted by long and charged tethers. The electrostatic field created by the tethers deflects trajectories of solar wind protons so that their flow-aligned momentum component decreases. The flow-aligned momentum lost by the protons is transferred to the charged tether by a Coulomb force (the charged tether is pulled by the plasma charge separation electric field) and then transmitted to the spacecraft as thrust. The concept is attractive for applications because no propellant is needed for traveling over long distances. The E-sail’s operating principle is different from other propellantless propulsion technologies such as the solar photon sail and the solar wind magnetic sail. The former is based on momentum transfer from sunlight (solar photons), while the latter is based on a large loop-shaped superconductive wire whose magnetic field deflects solar wind protons from their originally straight trajectories.


The main purpose of this article is to analyze the potential of E-sail technology in some of the envisaged possible applications for solar system space activities. To a limited extent we also adopt a comparative approach,estimating the added value and other advantages stemming from E-sail technology in comparison with present chemical and electric propulsion systems and(in some cases) with other propellantless propulsion concepts. When making such comparisons a key quantity that we use for representing the mission cost is the total required velocity change, Av, also called delta-v.The Sail Propulsion Working Group, a joint working group between the Navigation Guidance and Control Section and the Electric Propulsion Section of the European Space Agency, has envisaged the study of three reference missions which could be successfully carried out using propellantless propulsion concepts.


Even more advanced solar electric space sail configurations were explored in several previous electric sail papers.


Via Dr. Stefan Gruenwald
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Flexible all-carbon electronics integrated onto plants, insects, and more

Flexible all-carbon electronics integrated onto plants, insects, and more | Tecnologia | Scoop.it
(Phys.org) —Carbon-based electronics are being widely explored due to their attractive electrical and mechanical properties, but synthesizing them in large quantities at low cost is still a challenge.
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PhonoPaper, escondiendo sonidos dentro de imágenes

PhonoPaper, escondiendo sonidos dentro de imágenes | Tecnologia | Scoop.it
Imaginad una imagen en un papel, colgada de una pared, o en un libro, que al ser capturada por un teléfono emita un sonido específico.
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Historia del hacking #infografia #infographic

Historia del hacking #infografia #infographic | Tecnologia | Scoop.it
Hola:
Una infografía sobre la Historia del hacking. Vía
Un saludo
Historia del hacking
Archivado en: Infografía, Sociedad de la información Tagged: Infografía, internet, Seguridad, tic
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LinkTally, permite conocer cuantas veces fue compartida una URL en redes sociales

LinkTally, permite conocer cuantas veces fue compartida una URL en redes sociales | Tecnologia | Scoop.it
LinkTally es una pequeña aplicación web gratuita que permite conocer cuantas veces fue compartida una URL en las redes sociales más importantes.
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Surf anonymously - Download now and use for free | CyberGhost VPN

Surf anonymously - Download now and use for free | CyberGhost VPN | Tecnologia | Scoop.it

Via Kathleen Cercone, juandoming
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Steve Vaitl's comment, April 18, 2014 3:02 PM
Webroot Mobile security reports that website as a known source of malware!! It could be due to some of the features of the program, I have not checked it out in depth.
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Tatuajes y microimplantes inteligentes para controlar tu salud

Tatuajes y microimplantes inteligentes para controlar tu salud | Tecnologia | Scoop.it
A día de hoy estamos viviendo un cierto crecimiento de dispositivos que catalogamos como cuantificadores que nos ayudan a hacer un seguimiento...

Via ThePinkSalmon
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Between Ape and Artilect. Pioneers of Artificial Intelligence | #nano #AI #cyborgs #FreeBook

Between Ape and Artilect. Pioneers of Artificial Intelligence | #nano #AI #cyborgs #FreeBook | Tecnologia | Scoop.it

During 2010-12, noted AI researcher and long-time Humanity+ Board member Ben Goertzel conducted a series of textual interviews with researchers in various areas of cutting-edge science — artificial general intelligence, nanotechnology, life extension, neurotechnology, collective intelligence, mind uploading, body modification, neuro-spiritual transformation, and more. These interviews were published online in H+ Magazine, and are here gathered together in a single volume. The resulting series of dialogues treats a variety of social, futurological and scientific topics in a way that is accessible to the educated non-scientist, yet also deep and honest to the subtleties of the topics being discussed.

 

Between Ape and Artilect is a must-read if you want the real views, opinions, ideas, muses and arguments of the people creating our future.


Via Szabolcs Kósa, luiy
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luiy's curator insight, March 8, 2014 2:34 PM

- Itamar Arel: AGI via Deep Learning 

- Pei Wang: What Do You Mean by “AI”? 
- Joscha Bach: Understanding the Mind
- Hugo DeGaris: Will There be Cyborgs?
- DeGaris Interviews Goertzel: Seeking the Sputnik of AGI 
- Linas Vepstas: AGI, Open Source and Our Economic Future 
- Joel Pitt: The Benefits of Open Source for AGI
- Randal Koene: Substrate-Independent Minds
- João Pedro de Magalhães: Ending Aging 
- Aubrey De Grey: Aging and AGI
- David Brin: Sousveillance
- J. Storrs Hall: Intelligent Nano Factories and Fogs
- Mohamad Tarifi: AGI and the Emerging Peer-to-Peer Economy 
- Michael Anissimov: The Risks of Artificial Superintelligence 
- Muehlhauser & Goertzel: Rationality, Risk, and the Future of AGI 
- Paul Werbos: Will Humanity Survive?
- Wendell Wallach: Machine Morality
- Francis Heylighen: The Emerging Global Brain 
- Steve Omohundro: The Wisdom of the Global Brain and the Future of AGI 
- Alexandra Elbakyan: Beyond the Borg 
- Giulio Prisco: Technological Transcendence 
- Zhou Changle: Zen and the Art of Intelligent Robotics 
- Hugo DeGaris: Is God an Alien Mathematician? 
- Lincoln Cannon: The Most Transhumanist Religion?
- Natasha Vita-More: Upgrading Humanity 
- Jeffery Martin & Mikey Siegel: Engineering Enlightenment 

aanve's curator insight, March 8, 2014 10:03 PM

www.aanve.com

 

Mlik Sahib's curator insight, March 8, 2014 10:40 PM

- Itamar Arel: AGI via Deep Learning 

- Pei Wang: What Do You Mean by “AI”? 
- Joscha Bach: Understanding the Mind
- Hugo DeGaris: Will There be Cyborgs?
- DeGaris Interviews Goertzel: Seeking the Sputnik of AGI 
- Linas Vepstas: AGI, Open Source and Our Economic Future 
- Joel Pitt: The Benefits of Open Source for AGI
- Randal Koene: Substrate-Independent Minds
- João Pedro de Magalhães: Ending Aging 
- Aubrey De Grey: Aging and AGI
- David Brin: Sousveillance
- J. Storrs Hall: Intelligent Nano Factories and Fogs
- Mohamad Tarifi: AGI and the Emerging Peer-to-Peer Economy 
- Michael Anissimov: The Risks of Artificial Superintelligence 
- Muehlhauser & Goertzel: Rationality, Risk, and the Future of AGI 
- Paul Werbos: Will Humanity Survive?
- Wendell Wallach: Machine Morality
- Francis Heylighen: The Emerging Global Brain 
- Steve Omohundro: The Wisdom of the Global Brain and the Future of AGI 
- Alexandra Elbakyan: Beyond the Borg 
- Giulio Prisco: Technological Transcendence 
- Zhou Changle: Zen and the Art of Intelligent Robotics 
- Hugo DeGaris: Is God an Alien Mathematician? 
- Lincoln Cannon: The Most Transhumanist Religion?
- Natasha Vita-More: Upgrading Humanity 
- Jeffery Martin & Mikey Siegel: Engineering Enlightenment 

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Tech Data distribuye las impresoras 3D de bq - Educación 3.0

Tech Data distribuye las impresoras 3D de bq - Educación 3.0 | Tecnologia | Scoop.it
Techa Data y bq han llegado a un acuerdo para la distribución en exclusiva de sus impresoras 3D y, en concreto, el primero modelo bq Witbox.

Via Angel Acción Lamas
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Libros, tutoriales y vídeos sobre HTML, CSS, JavaScript, PHP y otras tecnologías web.

Libros, tutoriales y vídeos sobre HTML, CSS, JavaScript, PHP y otras tecnologías web. | Tecnologia | Scoop.it
Libros y tutoriales gratuitos sobre HTML, CSS, JavaScript, AJAX y otras tecnologías relacionadas con el diseño y la programación web.

Via Alejandro Sarbach
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Connected Living: The Next Big Thing After Facebook

Connected Living: The Next Big Thing After Facebook | Tecnologia | Scoop.it
Imagine waking up on a Monday morning in the year 2025 to the sweet voice of your digital assistant called Leyla. Leyla already woke you up 10 minutes early as she just learned from the Google Connected living home black box that syncs her with the outside world and all [...]

Via Mayra Aixa Villar
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Brain: MIT deciphers the routes of neuronal circuits

Brain: MIT deciphers the routes of neuronal circuits | Tecnologia | Scoop.it
Scientists at MIT have published their findings in Nature Neuroscience regarding the nerve routes that our brain uses to process information and data.
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Futuristic fusion reactors could make carbon-free power as early as 2019

Futuristic fusion reactors could make carbon-free power as early as 2019 | Tecnologia | Scoop.it

Dr. David Kirtley comes across as a smart, practical guy with a head for business. That creates some cognitive dissonance when he explains that his Redmond startup is developing fusion energy.

 

You’ve heard about fusion energy, the amazing power source of the future. Nuclear scientists promise fusion will have all the best qualities of conventional nuclear and natural-gas energy but none of the downsides. Fusion is carbon-free like today’s atomic power, but without the need to protect a thousand future generations from radioactive waste. Other than being mind-blowing, fusion would be relatively safe — no China Syndrome, no contamination, no weapons-grade materials to proliferate.

 

Thus far, fusion energy always has been an unfinished science that’s 50 years and $50 billion from commercialization. Seven nations are collaborating to build an experimental fusion reactor in France as an $11 billion proof of concept that still won’t produce electricity when it’s operational in 2027.

 

Dr. Kirtley’s company Helion Energy has taken the proven parts of fusion science and combined them into a design that can be commercially deployable within six years. That would be a decade ahead of Helion’s Bellevue neighbor, TerraPower LLC, a startup funded in part by Nathan Myhrvold and Bill Gates to build a traveling wave reactor that runs on uranium.

 

Helion Energy last week won the top prize in the Energy Generation category at the Cleantech Open Global Forum in Silicon Valley. The prize comes with a $5,000 check and a long menu of in-kind services. The audience also gave Helion a People’s Choice Award. The annual competition culminates a nine-month business accelerator for Cleantech startups.

 

The team at Helion comes out of the University of Washington and Mathematical Sciences Northwest. At its headquarters in Redmond, Helion has a working prototype that they say proves their design works. Deuterium gas goes in two ends of the device and produces a pair of plasmas per second. Plasma is responsible for the glow of lightning, neon lights and the Sun. As the two plasmas collide in the center, a magnetic pulse generates electricity.

 

At the Global Forum, Dr. Kirtley told me his design is compact, modular and competitive in today’s market. In the footprint of a semi trailer, each module will produce 50 megawatts of electricity (it would take ten of them to equal the output of a conventional power plant). The deuterium fuel is derived from seawater. The byproduct is a harmless stream of helium.

 

Helion Energy is raising $35 million to build a fusion reactor core that will demonstrate electricity production from fusion energy. Its technology previously received $4 million in funding from the U.S. Department of Energy.

 

“Helion isn’t looking for funding to do more science,” says Kirtley. “We already proved our technology. We’re now ready to start commercializing fusion energy.”

 


Via Dr. Stefan Gruenwald
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Predictions In Books {Infographic}

Predictions In Books {Infographic} | Tecnologia | Scoop.it
We have all read books that were simply ahead of their time with their predictions. That’s what fun about reading fiction and futuristic books. Not all predictions in books are accurate, but some are stunningly close.
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A mais pequena caneta do mundo de desenho 3D arrebatou o Kickstarter

A mais pequena caneta do mundo de desenho 3D arrebatou o Kickstarter | Tecnologia | Scoop.it
Em 2013 um dos projetos com mais sucesso foi a 3Doodler, uma caneta de desenho/impressão 3D. E quem diria que um projeto em tudo semelhante conseguiria conquistar de novo a comunidade de financiadores?
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Codecademy lança versão em português

Codecademy lança  versão em português | Tecnologia | Scoop.it
Há quem diga que, no século 21, aprender programação será tão importante quanto aprender a ler. Em um mundo repleto de novas tecnologias, conhecer a linguagem das máquinas pode ser uma habilidade necessária.
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7 imprescindibles herramientas de reportes y análisis para Facebook y Linkedin

7 imprescindibles herramientas de reportes y análisis para Facebook y Linkedin | Tecnologia | Scoop.it
Aunque las estadísticas predeterminadas que incluyen Facebook y Linkedin son interesantes, no sobra tener a la mano herramientas especializadas de análisis que generen lo que muchas veces se desea, un reporte sencillo y útil, nada más, nada menos.
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Google Glass

Google Glass | Tecnologia | Scoop.it

Via SocialEduca
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Imaging the Classroom of 2016, Empowered by Wearable Technology

Imaging the Classroom of 2016, Empowered by Wearable Technology | Tecnologia | Scoop.it

Wearable Tech is Poised for Explosive Growth in the Coming Years. How Will it Impact Education? The next big shift in technology is the growth of wearable tech. We’ve already embraced mobile...


Via Javier Tourón
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Cómo detectar virus con el Administrador de Tareas de Windows

Cómo detectar virus con el Administrador de Tareas de Windows | Tecnologia | Scoop.it
Windows incluye muchas herramientas integradas que son muy útiles, hoy en Bitelia te vamos a contar cómo detectar virus con el Administrador de Tareas.

Via Cecilia Palmieri, Angel Acción Lamas
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De Internet a Ubernet, 11 claves sobre la revolución internet en 25 años

De Internet a Ubernet, 11 claves sobre la revolución internet en 25 años | Tecnologia | Scoop.it
Decía Elizabeth Eisenstein que no pudo valorarse el impacto de la imprenta en nuestra sociedad hasta 100 años después de su invención.  Disminución de los poderes institucionales, la revolución científica, la transformación de la educación, cambios en la concepción de la infancia, etc. pueden atribuirse sin demasiado margen de error al invento de Gutttenberg. Del mismo modo, después de poco más de 20 años con la www, no resulta fácil realizar una prospección sobre cuáles serán

Via Javier Castro, Labtic.Unipe
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Javier Castro's curator insight, March 13, 2014 5:12 PM
De Internet a Ubernet, 11 claves sobre la revolución internet en 25 años
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Rise of the Robots--The Future of Artificial Intelligence: Scientific American

Rise of the Robots--The Future of Artificial Intelligence: Scientific American | Tecnologia | Scoop.it

“ By 2050 robot "brains" based on computers that execute 100 trillion instructions per second will start rivaling human intelligence (Rise of the Robots--The Future of Artificial Intelligence http://t.co/apbbzoIxmP)...”


Via Scott Turner, Ben Hendry, Margarida Sá Costa, massimo facchinetti
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Google Developers Hackademy: Introducción al desarrollo web HTML5 con Google Drive

Hoy te traemos el tercer curso completo de Google Developers Hackademy presentado por nuestro GDE +César Antón quien nos adentra a Google Drive en 5 lecciones. Ya sea que no lo hayas seguido, como recordatorio o repaso, César Antón nos lleva de la mano por esta introducción al desarrollo web en HTML5 con Google Drive. ¡Escuchemos al experto!

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Beneficios de trabajar desde casa #infografia #infographic #empleo

Beneficios de trabajar desde casa #infografia #infographic #empleo | Tecnologia | Scoop.it
Hola:
Una infografía con los beneficios de trabajar desde casa.
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