Earthbound detectives rely on fingerprints to solve their cases; now astronomers can do the same, using 'light-fingerprints' instead of skin grooves to uncover the mysteries of exoplanets.
via Science Daily
Zazzle Space Exploration market place
There are advances being made almost daily in the disciplines required to make space and its contents accessible. This blog brings together a lot of that info, as it is reported, tracking the small steps into space that will make it just another place we carry out normal human economic, leisure and living activities.
SCOAP³ partnership map (Image: CERN)
Only four years ago, most publications in High-Energy Physics (HEP) were behind paywalls, only accessible to a limited audience of academics. Today, nearly 90% of scientific articles in this field are available to everyone and authors from anywhere in the world can publish their articles without any financial barriers, all thanks to a collaboration hosted at CERN.
The Sponsoring Consortium for Open Access Publishing in Particle Physics (SCOAP³) is a global partnership involving 3000 libraries, national funding agencies and research institutions from 43 countries and three intergovernmental organisations. It functions on the basis of a ‘recirculation of funds’ business model, as a tripartite collaboration between libraries, national funding agencies and publishers of HEP journals. By centrally covering the costs involved in providing Open Access, SCOAP³ pays the publishers directly, thus removing subscription fees for individual journals and any expenses scientists might normally incur to publish their articles openly. This way, authors from anywhere in the world publish without any financial burden and retain the copyright of their work. Libraries pay their membership fees to the consortium, re-using funds previously spent on subscription fees for the journals which are now Open Access and member countries contribute according to their scientific output in the field.
Since its launch in 2014, SCOAP³ made more than 21 000 scientific articles published by authors from over 100 countries freely accessible to everyone. “What makes this collaboration work is the long tradition of sharing scientific knowledge amongst HEP researchers as well as CERN’s history of collaborating with other research labs. It is indeed in the Organization’s DNA to support the dissemination of the scientific information,” says Alexander Kohls, operations manager at SCOAP³.
“With the recent addition of journals of the American Physical Society, SCOAP3 has reached an important and encouraging milestone in our attempt to foster access to scientific information, which is the basis of any scientific work. Open Access to publications is but one of several initiatives including access to open data to carry out verifiable research independently,” adds Eckhard Elsen, CERN’s Director for Research and Computing.
By making nearly all HEP articles Open Access, SCOAP³ has also significantly increased the visibility of particle physics research: a recent study shows that the number of article downloads has more than doubled since the articles became Open Access. This means millions of new readers for the scientific literature in the discipline, and most importantly, readers from countries where access to scientific information is often limited.
“Open Access reflects values and goals – such as the widest dissemination of scientific results – that have been enshrined in CERN’s Convention for more than sixty years. I am proud that CERN is committed to continue is strong support of this important Open Access initiative,” says CERN’s Director for International Relations, Charlotte Warakaulle.
SCOAP³’s infrastructure is provided by CERN and governed by its member countries who meet regularly in the SCOAP³ Governing Council. Earlier this year, delegates met to discuss the future of SCOAP³ and the strategy for the next five years. One of the priorities is to get more countries involved in the partnership and to offer more collaboration opportunities. The worldwide financial cooperation is what makes this initiative possible, creating a role model for Open Access.
Due to its unique structure and amazing physicochemical properties including high chemical inertness, large specific surface area, high electric conductivity, mechanical flexibility, and biocompatibility, graphene holds great potential for bioelectronic implants.
One of the prominent uses of graphene in bioelectronics is recording of electrical signals from body parts, such as the heart or brain. Last year’s edition of the largest medical trade fair in the world – MEDICA 2017, featured several exhibits using graphene in biomedicine. Among the exhibits were a brain activity detector for early warning of epileptic seizures, a retinal implant serving as optical prostheses for people who have lost their sight, a brain-computer interface containing graphene electrodes to measure brain activity, and a fully functional robotic hand controlled by a bracelet with graphene sensors.
Illustration: Graphene ocular implants. Source: Graphene transistors for bioelectronics (arXiv)
Preceding these successful demonstrations of technology were years of painstaking scientific research, that bit-by-bit explored the possibilities and advantages of using graphene for bioelectronics. Early work focused on quantifying the interaction of graphene with biological material, such as lipid membranes. It was evident that the addition of tiny amounts of biological material to the surface of graphene would change its properties, i.e. graphene would behave as a biosensor. The most common graphene device used in biosensing is the graphene field effect transistor – GFET. GFET array sensor platforms have also been used to identify malaria-infected red blood cells at the individual cell resolution. Subsequent work showed that one can grow live cells on graphene and monitor their chemical activity via accompanying electrical signals. Both intracellular and extracellular activity was detected, such as cellular excretion and cell membrane’s potential modulation.
Other than serving the important function of registering biological signals, graphene found surprising new applications such as in bone implants. Porous solids made of graphene oxide were found to possess similar mechanical properties and biocompatibility to titanium, a standard bone-replacement material. Using graphite molds, this new material can be shaped into custom complex shapes as desired. And although eyebrows were initially raised about the heat that emanates when power is provided to graphene implants, which could damage the host organism, researchers quickly found a solution to overheating – adding water between graphene and the biological material. A thin layer of water separating the graphene from tissue could save surrounding cells from being fried when an implant is operated.
Taking on the offensive, latest research shows that a layer of vertical graphene flakes on a surface kill harmful bacteria, potentially stopping infections during procedures such as implant surgery. While destroying bacteria, the sharp graphene flakes do not damage human cells because a bacterium is one micrometer in diameter while a human cell is 25 micrometers.
To conclude, graphene is an excellent material for bioelectronics, proven by countless research papers that affirm this application as well as some recent working graphene implant prototypes. Graphene bioelectronics are among the most promising applications of graphene field effect transistors (GFETs), which are driving the growth of the single-layer graphene market.During a special one-day run, LHC operators injected lead "atoms" containing a single electron into the machine. (Image: Maximilien Brice, Julien Ordan/CERN)
Protons might be the Large Hadron Collider’s bread and butter, but that doesn’t mean it can’t crave more exotic tastes from time to time. On Wednesday 25 July, for the very first time, operators injected not just atomic nuclei but lead atoms containing a single electron into the LHC. This was one of the first proof-of-principle tests for a new idea called the Gamma Factory, part of CERN’s Physics Beyond Colliders project.
“We’re investigating new ideas of how we could broaden the present CERN research programme and infrastructure,” says Michaela Schaumann, an LHC Engineer in Charge. “Finding out what’s possible is the first step.”
During normal operation, the LHC produces a steady stream of proton–proton collisions, then smashes together atomic nuclei for about four weeks just before the annual winter shutdown. But for a handful of days a year, accelerator physicists get to try something completely new during periods of machine development. Previously, they accelerated xenon nuclei in the LHC and tested other kinds of partially stripped lead ions in the SPS accelerator.
“This special LHC run was really the last step in a series of tests,” said physicist Witold Krasny, who is coordinating a study group of about 50 scientists to develop new ways to produce high-energy gamma rays.
Accelerating lead nuclei with a remaining electron can be challenging because of how delicate these atoms are. “It’s really easy to accidentally strip off the electron,” explains Schaumann. “When that happens, the nucleus crashes into the wall of the beam pipe because its charge is no longer synchronized with the LHC’s magnetic field.”
During the first run, operators injected 24 bunches of atoms and achieved a low-energy stable beam inside the LHC for about an hour. They then ramped the LHC up to it’s full power and maintained the beam for about two minutes before it was ejected into the beam dump. “If too many particles go off course, the LHC automatically dumps the beam,” states Schaumann. “Our main priority is to protect the LHC and its magnets.”
After running the magnets through the restart cycle, Schaumann and her colleagues tried again, this time with only 6 bunches. They kept the beam circulating for two hours before intentionally dumping it.
“We predicted that the lifetime of this special kind of beam inside the LHC would be at least 15 hours,” said Krasny. “We were surprised to learn the lifetime could be as much as about 40 hours. Now the question is if we can preserve the same beam lifetime at a higher intensity by optimising the collimator settings, which were still set-up for protons during this special run.”
Physicists are doing these tests to see if the LHC could one day operate as a gamma-ray factory. In this scenario, scientists would shoot the circulating atoms with a laser, causing the electron to jump into a higher energy level. As the electron falls back down, it spits out a particle of light. In normal circumstances, this particle of light would not be very energetic, but because the atom is already moving at close to the speed of light, the energy of the emitted photon is boosted and it’s wavelength is squeezed (due to the Doppler effect).
These gamma rays would have sufficient energy to produce normal “matter” particles, such as quarks, electrons and even muons. Because matter and energy are two sides of the same coin, these high-energy gamma rays would transform into massive particles and could even morph into new kinds of matter, such as dark matter. They could also be the source for new types of particle beams, such as a muon beam.
Even though this is still a long way off, the tests this week were an important first step in seeing what is possible.
As Saturn and Mars ventured close to Earth, Hubble captured their portraits in June and July 2018, respectively. The telescope photographed the planets near opposition, when the Sun, Earth and an outer planet are lined up, with Earth sitting in between the Sun and the outer planet. Around the time of opposition, a planet is at its closest distance to Earth in its orbit. Hubble viewed Saturn on June 6, when the ringed world was approximately 1.36 billion miles from Earth, as it approached a June 27 opposition. Mars was captured on July 18, at just 36.9 million miles from Earth, near its July 27 opposition. Hubble saw the planets during summertime in Saturn’s northern hemisphere and springtime in Mars’ southern hemisphere. The increase in sunlight in Saturn’s northern hemisphere heated the atmosphere and triggered a large storm that is now disintegrating in Saturn’s northern polar region. On Mars, a spring dust storm erupted in the southern hemisphere and ballooned into a global event enshrouding the entire planet.
Europe’s first mission to Mercury will target the early morning of 19 October for launch, Arianespace and ESA announced today.
Radar data collected by ESA’s Mars Express point to a pond of liquid water buried under layers of ice and dust in the south polar region of Mars.
46 enthused teachers from 33 different countries took part in the International High-School Teacher Programme 2018 (Image: Anthony Valsamis /CERN)
On Sunday, 1 July 2018, CERN welcomed 46 teachers from 33 different countries (and all continents) to start the International High-School Teacher (HST) Programme 2018. This three-week residential programme, which has taken place at CERN every July since 1998, is designed for science teachers from all around the world to discover the fascinating world of particle physics. The programme includes lectures, on-site visits, hands-on workshops, discussions and Q&A sessions. Moreover, during the three weeks, all teachers collaborate in several working groups on various topics related to particle physics and its integration into the classroom. For example, teachers build particle traps in S’Cool LAB, develop and evaluate new tools for the CERN Open Data portal, run a medical applications hackathon at IdeaSquare, or update educational resources for the IPPOG database.
Since its formal implementation over 20 years ago, CERN’s HST programme has come a long way. While the first year saw the nine participating teachers attend summer-student lectures as well as a series of special lectures and visits prepared for them, the HST programme today brings together up to 48 participants from around the world, who follow a professional-development programme carefully designed for them.
What started once as a single programme for a small group of teachers has grown into one of CERN’s many success stories. The teacher programmes are an acknowledgement of the importance of teachers and the critical role they play in preparing the future of humanity. It has inspired and empowered teachers and, through them, their pupils. Over the past 20 years, HST participants from different parts of the world became firm friends and many more remain in touch with each other to this day. Indeed, a crucial part of the programme is the free evenings and carefully selected social events, which enable the participants to share ideas and learn from each other’s experiences.
In 2017, prompted by the ever-increasing number of applications, a second international teacher programme - the International Teacher Weeks programme - was set up to double CERN’s offer for teachers from around the world. CERN now offers teacher programmes almost year-round. So far, about 12000 teachers have participated in CERN’s national and international teacher programmes, and every year another 1000 teachers travel to Geneva to do so.
Teachers have always been key players in CERN’s mission to train the scientists of tomorrow and CERN’s teacher programmes will continue to inspire and enthuse teachers from around the world on a weekly basis. Twenty years on, the HST programme continues to bring together teachers from all around the world, who return to their classrooms as motivated ambassadors for science and engineering.
Find out more about CERN’s teacher programmes: cern.ch/teachers
The UK Space Agency has launched a competition to name a rover that is going to Mars to search for signs of life.
Traditional Korean music and dancing marked the start of the International Conference on High Energy Physics (ICHEP) in Seoul, South Korea. (Image: Marcos Dracos)
This year’s International Conference on High Energy Physics (ICHEP) — the “biggie” of conferences in high-energy physics — took place in Seoul, South Korea, on 4–11 July.
For a taste of the important scientific findings presented at the conference by the collaborations behind the main experiments at the Large Hadron Collider (LHC), read this related update for scientists.
New research using a decade of data from ESA’s Mars Express has found clear signs of the complex martian atmosphere acting as a single, interconnected system, with processes occurring at low and mid levels significantly affecting those seen higher up.
As Japan’s Hayabusa2 drew closer to its target Ryugu asteroid, a strange new planetoid came into view – but one with a somewhat familiar shape. This distinct ‘spinning top’ asteroid class has been seen repeatedly in recent years, and might give a foretaste of things to come for ESA’s proposed Hera mission.