(PhysOrg.com) — HP’s mysterious new smartphone entrants have just been revealed. The HP Voice Messenger will sell for €399 ($532) on November 5th and the Data Messenger will be selling for €499 ($665) on November 22nd. The two models will be available either SIM-free through HP resellers, or with a wireless contract through Vodafone Europe-wide. Citation: HP Reveals Their Ipaq Data Manager & Voice Messenger Smartphones (2008, October 21) retrieved 18 August 2019 from https://phys.org/news/2008-10-hp-reveals-ipaq-voice-messenger.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. HP Unveils iPAQ 500 Smartphone Explore further The HP Ipaq Data Manager smartphone is a Windows Mobile 6.1 Professional device which features a slide-out keyboard, 2.8 inch QVGA screen, WiFi, Bluetooth, Quadband GSM, Tri-band 7.2 Mbps HSDPA (European bands), HSUPA, A-GPS and a 3.1 Megapixel camera with LED flash. There is also 128 MB RAM and 256 MB ROM, supports microSD expansion and comes with a 1140 mAh battery.The Data Manager smartphone is 160g and 5.7 x 1.74 x 11.4 cm, and has a 2.5mm headphone jack. The phone is bundled with Opera Mobile, Google maps mobile and comes with a 30 Day Trial of Webraska Turn-by-Turn Navigation.The HP Ipaq Voice Messenger has similar specs to the Data Manager, but instead of the slide-out keyboard it has a 20 key suretype-style keyboard. The non-touchscreen Windows Mobile 6.1 Standard device has a 2.4 inch QVGA screen. The connectivity and GPS is the same, but the device is much lighter at 107 g and measures 5.0 x 1.36 x 11.4 cm. This smartphone comes with a larger 1260 mAh Lithium-Polymer battery.Both smartphones feature micro-USB ports for synchronization and a new optical sensor that replaces the five-way navigator key common to many phone designs. You navigate through the menus by just gliding your thumb over the disk, and tapping it when you want to select something.Both models have a power saving mode that minimizes power consumption if the battery charge level starts to get low while the user is out on the road. HP said that the iPaq Voice Messenger is aimed at users that want a phone for voice calls first, but who may also need to receive emails while on the go.
Month: August 2019
Explore further © 2010 PhysOrg.com Sharp Develops Mass-Production Technology for Triple-Junction Thin-Film Solar Cells This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. (PhysOrg.com) — Sanyo has announced its development of the world’s most energy efficient solar module, the HIT-N230. The module was unveiled at a press conference run by Sanyo Electric’s Solar Division. Citation: Sanyo announces world’s most efficient solar module (2010, June 16) retrieved 18 August 2019 from https://phys.org/news/2010-06-sanyo-world-efficient-solar-module.html Sanyo is a major manufacturer of solar panels, with three factories in Japan, one in Hungary serving Europe, and a fifth in Mexico that serves the US market. The N series of modules are produced in Japan and consist of solar cells of the Hetero-junction with Intrinsic Thin-layer (HIT) type.HIT solar cells contain a single thin crystalline wafer of silicon surrounded by ultra-thin amorphous layers of silicon. They are characterized by high efficiency at high temperatures, and increased output power even during high summertime temperatures. The high conversion efficiency of HIT cells means more capacity can be installed compared to conventional crystalline silicon solar cells.The new N230 solar cell module is claimed to have an energy conversion efficiency of 20.7 percent, which makes it the most efficient solar module produced so far. The unprecedented efficiency was achieved by increasing the number of solar cell tabs from two to three and making each tab thinner. They also applied AG coated glass to the cells, and this reduces the amount of scattering and reflection of light. The increase in energy conversion efficiency could make the solar modules useful in areas with less than ideal amounts of sunshine. Sanyo is already one of the leading manufacturers of solar cells and modules, and the company is currently expanding its solar cell module production at Kaizuka City and Ohtsu City in Japan in response to increased demand. In total Sanyo plans to nearly double its HIT solar cell production from the current level of 340 MW to 600 MW by March next year.National and local installation subsidies in Japan have seen the local market expand rapidly, and this has also been helped by the national government’s new program for purchasing surplus electricity generated by solar installations.The 230W model N230 and 225W N225 will both be officially launched in Japan in autumn this year and in Europe in 2011.
© 2011 PhysOrg.com The international team of scientists, led by Dr Ehab Abouheif of the Department of Biology at McGill University in Montreal, Canada, looked at the genomes of two ant species that produce supersoldiers. They identified the genetics behind the supersoldier caste and were able to activate the genes by treating ant larvae with methoprene, a growth hormone. As expected, the ant larvae became supersoldiers.They then treated in the same way larvae of Pheidole morrisi, an ant species which lives in New York and that does not normally produce supersoldiers, but which lead author, Dr Abouheif, had previously noted produced large-headed ants resembling supersoldiers on rare occasions. The treated larvae grew to become large headed and jawed ants resembling supersoldiers. The same effect was produced in two other Pheilode species, which are not known to produce supersoldiers.Dr Abouheif and colleagues report, in their paper published in the journal Science, that ant larvae normally develop into soldiers or workers depending on the levels of the “juvenile hormone”: if levels are high the ants become soldiers, while if they are low they become the smaller worker ants. In the species that produce supersoldiers there is a second high threshold of the juvenile hormone, above which the larvae develop into the larger supersoldiers. The growth hormone methoprene, used in the experiments, mimics the effects of juvenile hormone.The results of the experiments suggest that even those species that do not produce supersoldiers must have been able to do so in the distant past, some 35 to 60 million years ago, and that they still retain the genetic information for supersoldier production that can be reactivated under certain environmental or nutritional states. The researchers say that retaining the ancestral genetic tools could be important for the evolution of new physical traits. Supersoldier ants occur naturally in species found in Mexico and the south-west of the USA. They were also known in ancestral species, and Abouheif and the team suggest the common ancestor of the entire Pheidole genus had the ability to produce supersoldiers. It is not known why only eight of the species retain the ability and the remainder simply abandon the nests if they are invaded by predatory army ants, but Abouheif said the genes might have been repeatedly reactivated. This would explain anomalies such as the rare instances of supersoldiers he noted in the P. morrisi ants, which is a species not threatened by army ants.Dr. Abouheif and colleagues think that their work in unlocking ancestral features could find application in fields such as agriculture, where it might be used to breed crops with greater nutritional value. Abouheif also suggests the work might also shed some light on the growth of cancers, which he said could be “the unleashing of some kind of ancestral potential,” which might be reversible if it could be identified. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Death from above: Parasite wasps attacking ants from the air filmed for the first time A supersoldier communicates with a minor worker from the hyper-diverse ant genus Pheidole. Photo courtesy of Alex Wild/alexanderwild.com (PhysOrg.com) — There are over 1100 species of Pheidole genus ants, and most individual ants belong to either the worker or soldier caste. In only eight of the Pheidole species, some individuals can belong to a “supersoldier” subcaste instead, and these ants fight off predatory army ant species and bar their way by blocking off the entrances to the nest using their over-sized heads. Now, scientists have managed to create supersoldiers in other species by reactivating ancestral genes. Journal information: Science More information: Ancestral Developmental Potential Facilitates Parallel Evolution in Ant, Science 6 January 2012: Vol. 335 no. 6064 pp. 79-82. DOI:10.1126/science.1211451ABSTRACTComplex worker caste systems have contributed to the evolutionary success of advanced ant societies; however, little is known about the developmental processes underlying their origin and evolution. We combined hormonal manipulation, gene expression, and phylogenetic analyses with field observations to understand how novel worker subcastes evolve. We uncovered an ancestral developmental potential to produce a “supersoldier” subcaste that has been actualized at least two times independently in the hyperdiverse ant genus Pheidole. This potential has been retained and can be environmentally induced throughout the genus. Therefore, the retention and induction of this potential have facilitated the parallel evolution of supersoldiers through a process known as genetic accommodation. The recurrent induction of ancestral developmental potential may facilitate the adaptive and parallel evolution of phenotypes. Citation: Supersoldier ants created in the lab by reactivating ancestral genes (2012, January 6) retrieved 18 August 2019 from https://phys.org/news/2012-01-supersoldier-ants-lab-reactivating-ancestral.html Explore further
One such speaker is Susan Hough—she’s with the US Geological Survey. She reported to those in attendance that prior to the invention and implementation of seismometers, evidence of earthquakes could be found only through earlier anecdotal writings. But such records, she notes, tended to underestimate the size of the quakes being described. Suddenly, she says, after 1900, earthquakes started getting bigger.They didn’t get bigger of course, what she meant was that the size perception of earlier earthquakes had been underestimated—many might not be in the historical record at all. Part of the problem, she explained, was that until fairly recently, it was believed that all earthquakes of a certain large size, produced tsunami’s, which of course tend to show up in written records.The problem with relying on underestimated data, she also explained, is that it causes modern day planners to underestimate what is likely to happen in the future. She notes that one example was that of the Kamchatka quake that occurred in 1841 in Russia. The record shows it to have been an 8.3 magnitude quake, but closer scrutiny suggests that estimate was wrong—reports of a tsunami in Hawaii at the time, indicate it was almost certainly much stronger, perhaps as high as magnitude 9.2.Roger Musson of the British Geological Survey concurred, noting that people were taken almost completely by surprise when the Fukushima quake struck in 2011. But, looking back, it’s clear that one almost exactly like it struck in the same place back in the 9th century. He noted virtually the same thing can be said for the Haiti quake that struck in 2010.The overall point the geologists are trying to make is that it’s likely that the reported numbers and sizes of quakes described in the past are in error, and thus, using them as guides for the future is both risky and ill-advised as the lives of people in many at-risk areas may be depending on more accurate assessments. © 2013 Phys.org (Phys.org) —Several geologists from around the world are presenting a case for missing or underreported earthquakes at this year’s American Geophysical Union Fall meeting being held in San Francisco. They suggest that faulty or missing data from before 1900 might be leading to underestimations of the numbers of big quakes to expect in the future. Explore further 6.5 magnitude quake off Alaska’s Aleutian Islands Aerial photo of the San Andreas Fault in the Carrizo Plain, northwest of Los Angeles. Credit: Wikipedia. Citation: Geologists report that risks of big earthquakes may be underestimated (2013, December 12) retrieved 18 August 2019 from https://phys.org/news/2013-12-geologists-big-earthquakes-underestimated.html More information: fallmeeting.agu.org/2013/ This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
(Phys.org)—A team of researchers with members from institutions in Spain, France and Egypt has demonstrated that hydrogen atoms on graphene yield a magnetic moment and furthermore, that such moments can order ferromagnetically over relatively large distances. In their paper published in the journal Science the group describes experiments they carried out in attempting to cause a sheet of graphene to become magnetic, how they found evidence that it was possible using hydrogen atoms, and the ways such a material might be used in industrial applications. Shawna Hollen with the University of New Hampshire, and Jay Gupta with Ohio State University, offer some insights into the work done by the team in the same journal issue with a Perspectives piece—they also outline the hurdles that still need to be overcome before magnetic graphene might be used in real applications. A picture of hydrogen atoms in graphene. Credit: CIC nanoGUNE Credit: AlexanderAlUS/Wikipedia/CC BY-SA 3.0 More information: H. Gonzalez-Herrero et al. Atomic-scale control of graphene magnetism by using hydrogen atoms, Science (2016). DOI: 10.1126/science.aad8038AbstractIsolated hydrogen atoms absorbed on graphene are predicted to induce magnetic moments. Here we demonstrate that the adsorption of a single hydrogen atom on graphene induces a magnetic moment characterized by a ~20–millielectron volt spin-split state at the Fermi energy. Our scanning tunneling microscopy (STM) experiments, complemented by first-principles calculations, show that such a spin-polarized state is essentially localized on the carbon sublattice opposite to the one where the hydrogen atom is chemisorbed. This atomically modulated spin texture, which extends several nanometers away from the hydrogen atom, drives the direct coupling between the magnetic moments at unusually long distances. By using the STM tip to manipulate hydrogen atoms with atomic precision, it is possible to tailor the magnetism of selected graphene regions. Explore further Citation: Researchers demonstrate hydrogen atoms on graphene yield a magnetic moment (2016, April 22) retrieved 18 August 2019 from https://phys.org/news/2016-04-hydrogen-atoms-graphene-yield-magnetic.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. © 2016 Phys.org Graphene’s superior qualities as a material have been well documented, though one of its drawbacks has not been highlighted as much—it is not magnetic. If it were, it could conceivably be used in many more applications. That has led to efforts to do things to a sheet of graphene that would cause it to become magnetic, one of which is by adding hydrogen atoms to its surface, creating what has been called graphane. Unfortunately, stability has been an issue, making the process difficult to control. In this new effort, the researchers have taken a different approach—they took advantage of the fact that magnetism occurs in graphene when an imbalance occurs in two sub-lattices that are part of the whole— that means the number of atoms that exist in an individual sublattice can be caused to be unequal due to such things as point defects or geometric shape. That allows a hydrogen adatom to bond with a carbon pz-orbital. The end result is magnetic moments being formed in the honeycomb lattice, with such moments aligning ferromagnetically when they are on the same sublattice, and antiferromagnetically when they are on an opposing sublattice.Such a material, Hollen and Gupta note, might allow for storing information at much higher densities than has ever been seen before, but before that can happen, they also note, several hurdles must be overcome, such as realizing atomic scale precision with the process on a large scale. Journal information: Science A new way to make higher quality bilayer graphene
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Citation: Small long-serving satellite observes ammonia emission from the center of our galaxy (2017, January 16) retrieved 18 August 2019 from https://phys.org/news/2017-01-small-long-serving-satellite-ammonia-emission.html Odin was launched on February 20, 2001 with the aim of studying the depletion of the ozone layer in the atmosphere and searching for water and oxygen in interstellar space. With a mass of about 250 kilograms, the spacecraft has dimensions of 2.0 x 1.1 meters (3.8 meters when fully deployed in orbit). The satellite is equipped with an advanced radiometer using a 1.1-meter telescope and a spectrograph, called the Optical Spectrograph and Infrared Imaging System (OSIRIS).Odin was originally designed to be operational for about two years, but the spacecraft is still in good health and is currently functioning nominally. During the astrophysics part of its mission, the satellite has observed water in comets and detected molecular oxygen in interstellar clouds. Now, a team of Swedish researchers that includes Odin mission scientists has presented new results proving that the spacecraft can still conduct significant detections.”Recently, Odin has made complementary observations of the 572 GHz NH3 line towards the Sgr A +50 km s−1 cloud and circumnuclear disk (CND). (…) Significant NH3 emission has been observed in both the +50 km s−1 cloud and the CND. Clear NH3 absorption has also been detected in many of the spiral arm features along the line of sight from the sun to the core of our galaxy,” the scientists wrote in the paper.The observations were carried out in April 2015 and April 2016 as part of a larger survey studying the Sagittarius A complex radio source consisting of Sgr A*, the supernova remnant Sagittarius A East and the spiral structure Sagittarius A West.According to the paper, the spacecraft detected a very large velocity width (80 km s−1) of the ammonia emission associated with the shock region in the southwestern part of the CND. The researchers propose that it may suggest a formation scenario similar to that of gas-phase water in shocks and outflows.”The very high gas-phase water abundance determined for the shock region at CND SW by Karlsson et al. (2015) is similar to that found in the red-ward high-velocity wings of the Sgr A molecular clouds, and likely results from shock heating causing release of pre-existing grain surface water, possibly combined with high temperature shock chemistry,” the paper reads.The authors concluded that the high-quality spectra obtained by Odin clearly demonstrate the satellite’s continuing capabilities. It shows that it is possible to build a comparatively cheap, but complicated spacecraft that can remain in high quality operation for a long mission lifetime. © 2017 Phys.org More information: Odin observations of ammonia in the Sgr A +50 km/s Cloud and Circumnuclear Disk, arXiv:1701.02536 [astro-ph.GA] arxiv.org/abs/1701.02536AbstractContext. The Odin satellite is now into its sixteenth year of operation, much surpassing its design life of two years. One of the sources which Odin has observed in great detail is the Sgr A Complex in the centre of the Milky Way. Aims. To study the presence of NH3 in the Galactic Centre and spiral arms. Methods. Recently, Odin has made complementary observations of the 572 GHz NH3 line towards the Sgr A +50 km/s Cloud and Circumnuclear Disk (CND). Results. Significant NH3 emission has been observed in both the +50 km/s Cloud and the CND. Clear NH3 absorption has also been detected in many of the spiral arm features along the line of sight from the Sun to the core of our Galaxy. Conclusions. The very large velocity width (80 km/s) of the NH3 emission associated with the shock region in the southwestern part of the CND may suggest a formation/desorption scenario similar to that of gas-phase H2O in shocks/outflows. (Phys.org)—Completing its 16th year in orbit, a small Swedish astrophysics and aeronomy satellite named “Odin” has proven that it is still capable of carrying out important observations of space. The spacecraft has lately observed ammonia (NH3) emissions from an astronomical radio source known as Sagittarius A* (Sgr A* for short) at the center of the Milky Way galaxy. The results of these observations were published January 10 in a paper available on arXiv.org. Astronomers discover molecular and atomic clouds associated with a superbubble in LMC Explore further Artist’s rendition of the Odin spacecraft in orbit. Credit: SNSB
Citation: Radio emission detected from a gamma-ray pulsar (2017, July 5) retrieved 18 August 2019 from https://phys.org/news/2017-07-radio-emission-gamma-ray-pulsar.html © 2017 Phys.org Astronomers discover bubble-like structure associated with the pulsar PSR J1015−5719 This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Gamma-ray pulsars are rotating neutron stars emitting gamma-ray photons. Some of them also showcase radio emission that is often difficult to detect. This is most probably due to the fact that their narrow radio beams miss the sightline towards Earth.Located nearly 2,000 light years away from the Earth, J1732−3131 has a rotation period of about 196 milliseconds and is one such gamma-ray pulsar with hart-to-identify radio emission. The pulsar was found thanks to the data provided by the large area telescope (LAT) onboard NASA’s Fermi Gamma-ray Space Telescope. So far, only a faint radio signal from this pulsar was detected at 34 MHz in 2012.More recently, Maan’s team, motivated by previous faint detections, conducted follow-up observations of J1732−3131 between March 2014 and April 2015, using the Ooty radio telescope (ORT), located in Muthorai, India. This 530-meter-long and 30-meter-wide cylindrical paraboloid telescope allowed the researchers to observe the pulsar at 327 MHz, which resulted in detection of a faint periodic radio signal.”We report an extensive follow-up of the pulsar at 327 MHz with the Ooty radio telescope. Using the previously observed radio characteristics, and with an effective integration time of 60 hours, we present a detection of the pulsar at a confidence level of 99.82 percent,” the authors of the study wrote in the paper.The astronomers estimate that the 327 MHz mean flux density of J1732−3131 is between 0.5 and 0.8 mJy and the spectral index in the range from −2.4 to −3.0.More importantly, however, the 1,400 MHz pseudo-luminosity of the pulsar is only between 2.2 and 8.9 μJy kpc2, which suggests that J1732−3131 is one of the least luminous pulsars known to date.According to the scientists, their research provides new clues about gamma-ray pulsars in general, which could improve their understanding of these peculiar neutron stars. They noted that some of the radio-quiet gamma-ray pulsars might actually be very faint radio sources, and therefore not detectable in the radio searches using current generation telescopes. That is why the researchers call for more studies of such pulsars using more powerful radio telescopes.”The high sensitivity of upcoming radio telescopes like square kilometre array (SKA) and the 500-meter Aperture Spherical Telescope (FAST) will enable radio detection, and facilitate better studies of such pulsars,” the paper reads.SKA is a large, multi-radio telescope network being built in Australia and South Africa, which is expected to start initial observations in 2020. FAST is the world’s largest filled-aperture radio telescope, located in China. It achieved first light in September 2016, and is currently undergoing testing and commissioning. Explore further (Phys.org)—A team of astronomers led by Yogesh Maan of the Netherlands Institute for Radio Astronomy (ASTRON) has discovered radio emission from the gamma-ray pulsar known as J1732−3131. The study, presented in a paper published June 26 on arXiv.org, provides more details about J1732−3131, which was originally detected as a radio-quiet pulsar. Phase-aligned radio and gamma-ray profiles of J1732−3131. The continuous blue line shows the 327 MHz average profile from 2014 observations and the dashed-dotted-dashed red curve shows the gamma-ray profile. The horizontal extent of the grey shade on either side of the radio profile indicates the uncertainty in phase corresponding to 1σ error in DM. For clarity, both the profiles are duplicated and plotted over a range spanning two rotations of the pulsar. Credit: Maan et al., 2017. More information: Detection of radio emission from the gamma-ray pulsar J1732-3131 at 327 MHz, arXiv:1706.08613 [astro-ph.HE] arxiv.org/abs/1706.08613AbstractAlthough originally discovered as a radio-quiet gamma-ray pulsar, J1732-3131 has exhibited intriguing detections at decameter wavelengths. We report an extensive follow-up of the pulsar at 327 MHz with the Ooty radio telescope. Using the previously observed radio characteristics, and with an effective integration time of 60 hrs, we present a detection of the pulsar at a confidence level of 99.82%. The 327 MHz mean flux density is estimated to be 0.5-0.8 mJy, which establishes the pulsar to be a steep spectrum source and one of the least-luminous pulsars known to date. We also phase-aligned the radio and gamma-ray profiles of the pulsar, and measured the phase-offset between the main peaks in the two profiles to be 0.24±0.06. We discuss the observed phase-offset in the context of various trends exhibited by the radio-loud gamma-ray pulsar population, and suggest that the gamma-ray emission from J1732-3131 is best explained by outer magnetosphere models. Details of our analysis leading to the pulsar detection, and measurements of various parameters and their implications relevant to the pulsar’s emission mechanism are presented.
European eel. Credit: Wikipedia/CC BY-SA 3.0 A team of researchers with members from Japan, Sweden, Denmark and Germany has found evidence showing that European eel spawn across a 2000 km wide region of the North Atlantic Ocean. In their paper published in the journal Biology Letters, the group describes their study of recently hatched eel larvae in the North Atlantic Ocean, and what they found. Study shows European eel migration not as uniform and simple as thought More information: Michael J. Miller et al. Spawning by the European eel across 2000 km of the Sargasso Sea, Biology Letters (2019). DOI: 10.1098/rsbl.2018.0835 © 2019 Science X Network Explore further Journal information: Biology Letters Almost a hundred years ago, scientists discovered that European eels have a unique lifestyle—one that includes spawning in the Sargasso Sea, which is approximately 5000 to 7000 kilometers from where they live as juveniles and adults in European and North African rivers. But the extent of their spawning has never been pinned down. The researchers note also that the number of European eels has been dropping dramatically since the 1970s, and nobody knows why. The current population is believed to be approximately 5 percent of what it once was. In this new effort, the researchers used multiple ships to survey large parts of the North Atlantic Ocean from approximately 70°W to 50°W—to learn more about the spawning habits of the endangered eel.The Sargasso Sea is actually an area entirely within the North Atlantic Ocean, just off the east coast of the United States—it is the only sea in the world that has no land boundaries. It became singled out as voyagers discovered it was bounded by four ocean currents that form a gyre. It was named for the Sargassum seaweed that grows in abundance there. Prior research has shown the area to be mostly free of geographical formations—its bottom is mostly flat. The area is known for its marine plants and for its deep blue hue.The researchers report that their survey efforts showed recently hatched eel larvae floating across a 2000 km-wide region of the North Atlantic Ocean—not just the Sargasso Sea. They noted also that prior researchers working as far back as 1921 had found the larvae in similar parts of the ocean. The researchers suggest that despite severe reductions in population, the European eel still spawns as far and wide as it ever did. They suggest also that their findings may contribute to a plan for preventing the eels from disappearing altogether. Citation: European eel found to spawn across 2000 km wide region of the North Atlantic Ocean (2019, April 30) retrieved 18 August 2019 from https://phys.org/news/2019-04-european-eel-spawn-km-wide.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
Citation: Fermi observations provide insights into the nature of Terzan 5 globular cluster (2019, June 3) retrieved 18 August 2019 from https://phys.org/news/2019-06-fermi-insights-nature-terzan-globular.html Three new millisecond pulsars discovered in Terzan 5 globular cluster Observations of globular clusters (GCs) in our Milky Way galaxy are of high importance for astronomers as they are among the oldest objects in the universe. Therefore, they could serve as natural laboratories for the study of stellar evolution processes.Discovered about a half-century ago, Terzan 5 is a 12-billion-year-old galactic GC located some 19,000 light years away. The cluster has a particularly high central stellar density, high metallicity, and also the highest stellar interaction rate of all GCs in the Milky Way. Terzan 5 is known to host 37 out of 130 millisecond pulsars (MSPs) detected so far, what makes it a record holder when it comes to the largest number of MSPs in a galactic GC. Previous studies of this cluster have also shown that it contains at least two distinct stellar populations with different ages and iron content. This could suggest that Terzan 5 may not be a “true” globular cluster, but a result of a merger of two clusters, for instance, or a remnant of a disrupted galaxy.In order to get more detailed information about Terzan 5, which could verify these possibilities, an international team of astronomers led by Hambeleleni Ndiyavala of North-West University in Potchefstroom, South Africa, decided to analyze new data obtained by the Fermi spacecraft. This dataset allowed the researchers to model the broadband spectral energy distribution (SED) in the cluster.”We therefore aimed to gather more data on Terzan 5 and model the updated SED in a leptonic scenario,” the astronomers wrote in the paper.In particular, the spectral model described in the study postulates four spectral components, namely: low-energy synchrotron radiation (LESR), high-energy synchrotron radiation (HESR), curvature radiation (CR) and inverse Compton (IC). The model also allowed the astronomers to constrain the MSP population’s distribution of spin-down luminosity.According to the study, the updated SED in Terzan 5 is most likely due to a cumulative pulsed emission from a population of embedded MSPs. Moreover, it could be as well attributed to unpulsed emission from the interaction of leptonic winds with ambient magnetic and soft-photon fields.”We obtained new Fermi data that we could fit using a model for the cumulative CR from a population of MSPs embedded within Terzan 5. These data also proved to be constraining for the low-energy tail of the unpulsed IC component, yielding a particle efficiency of ηp~3 percent, depending on the choice of several parameters, notably〈 ̇Evis〉and NMSP,tot,” the paper reads.In concluding remarks, the astronomers underlined the importance of further studies of Terzan 5 and similar clusters to get a more comprehensive view on the nature and properties of galactic GCs in general. They added that such instruments like the Cherenkov Telescope Array (CTA) could be much helpful in identifying new very-high-energy (VHE) GCs.”This will allow us to further scrutinize competing emission models, as well as developing new, more complete and comprehensive ones that might explain the spatial and spectral properties of galactic GCs at an ever increasing level of detail,” the authors of the paper noted. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. © 2019 Science X Network More information: Hambeleleni Ndiyavala, et al. Probing the pulsar population of Terzan 5 via spectral modeling. arXiv:1905.10229v1 [astro-ph.HE]: arxiv.org/abs/1905.10229 Using NASA’s Fermi Gamma-ray Space Telescope, astronomers have collected important data that could disclose the real nature of the globular cluster Terzan 5. The new study, presented in a paper published May 24 on arXiv.org, delivers new information regarding the cluster’s pulsar population and its broadband emission spectrum. Explore further Different spectral components for Terzan 5 predicted by the leptonic models of Kopp et al. (2013) and Harding et al. (2008); Harding & Kalapotharakos (2015). Image credit: Ndiyavala et al., 2019.
However, with time his art became more restrictive and nuanced. Following that, his pictorial space became vacant and less detailed where figures were reduced to their bare structural essentials.In his on-going exhibition Building dreams from very little…, compositions of lithographs, watercolours and drawings, have certain reiterative images like a ball of thread symbolising the thread of human destiny; a rib-cage visible through the parched paper-thin skin. Hore’s deftly delineated figures serve as negative manifestations of community, ideology and a nation undergoing cataclysmic changes. Hore’s body of work is a facsimile impression of the unending poverty and violence in the world. ‘My paintings are personal, a response, almost a conversation, with my surroundings,’ said Hore.When: Till 20 DecemberWhere: Art Heritage Gallery
All the art enthusiasts over the city can head on as Kala Mela 18 presents the group exhibition titled Drishta that kick started yesterday. The show that exhibits paintings, sculptures, drawings and installations is curated by Sanchit Jain and is organised by Iqbal Krishan. The show was inaugurated by Yogendra Chandela, Mayor of North Delhi on 1 July and the guest of honour was Meenakshi Lekhi. The aim of this event is to give a better platform to emerging artistes from all over India. Some of artistes exhibiting their works are Poonam Rana, Shuchi Khanna, Krupa Shah, Iqbal Krishan, Hemraj, Shridhaer Iyer, Manish Pushkale and Fida Khan, Mansa Bedi. Other participating artistes include Santosh Kumar Sahni, Sanchit Jain, Ahish Kumar, Sadhna Tiwari, Anuja, Diksha Kain, Reena Choudhary, John Luis, Manoj Bhatti, Tarun Kumar, Seema, M Hosakoti, Rini Pant, Somnand Gadakari, Chirnjeev Panda, Sanjay Kr Biswal, Jyotika Nagar and Srinivasan Royal. Also Read – ‘Playing Jojo was emotionally exhausting’Kala Mela 18 has been organising fairs with painters to reawaken the appreciation for paintings among the people. These fairs comprise of different portrait works from contemporary artistes. Their motive is to bring renaissance in the realm of art and painting and invoke the lost interest for painting and art in masses. We reside in a society where aspiring painters are forced to switch profession because our vision has become shrouded with a thought that it is full of struggle and their lives get marred. Kala Mela 18 helps those artistes to come forth and show their talent. Till now it has successfully accomplished five of its fairs which boasts of works form more than 200 artistes from almost every state.When: On till 4 July Where: Visual Arts Gallery, India Habitat Centre, Lodhi RoadTiming: 10 am – 8 pm
Kolkata: The Mamata Banerjee government on Saturday sent letters to as many as five states including Odisha, Telangana, Andhra Pradesh and Punjab seeking additional police forces for providing security to as many as 58,467 polling booths where the forthcoming Panchayat elections will be held on May 14. “We have written to five states seeking additional forces,” a senior official of the state Home department said stating that the personnel from other states will be used as “back up”. Also Read – Heavy rain hits traffic, flightsIt may be mentioned that as per requirement of the State Election Commission (SEC) there should be one armed personnel per booth. Added to this, there are 341 blocks out of which election is being held in 330.”The SEC wants to have one company per block, that is around 3,3000 armed forces for patrolling duty, quick response and circle office, in case of emergency. Hence, as per SEC’s requirement of armed forces, we need to have 91,467 personnel. Our strength is 46,000,” an official in the state Secretariat said. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killed”The shortfall stands at 45,467. We are trying to arrange for the additional forces from the five states to which we have already written,” he added.It may also be mentioned that as per the government’s proposal sent to the SEC a few days ago, there would be one armed police per premise and one constable per booth. The government had assured that they would make up for the shortfall with Home Guards and civic volunteers whose strength is around 1,10,000. Meanwhile, the BJP has decided to go to court on Monday over alleged inadequate security for the elections. It took the decision after the meeting of Opposition parties’ representatives with State Election Commissioner Amarendra Kumar Singh over security concerns on Saturday.The Communist Party of India-Marxist and Party of Democratic Socialism (PDS) have already decided to move court on Monday on the ground that the State Election Commission allegedly announced the election date without discussing security arrangements with the Opposition parties as per the Calcutta High Court’s order.”The outcome of the meeting was a zero. The State Election Commission does not have any concrete plan on security on the polling day. It is strange that the State Election Commissioner just inquired about our demands but did not divulge any details about his own planning,” alleged BJP vice-president Joy Prakash Majumdar.Communist Party of India-Marxist leader Rabin Deb complained that the Commission couldn’t provide them with the figures of security personnel that would be deployed. “Our candidates were forced to withdraw the nomination and water connection and power lines were snapped in those areas. We demand action against them,” Deb said.
Inspired by the stories, struggles, dreams and hopes of a motley group of teenagers, Walk! is a show born out of a
Tamluk(WB): Six persons were killed and 12 others injured when a SUV collided with a bus in East Midnapore district, a senior police officer said today. The SUV collided with the bus on NH 116B near Marisha yesterday killing six persons including the driver, Superintendent of Police, V Solomon Nesakumar said. The 12 injured are admitted to hospital, the SP said. The SUV was on its way to Digha in East Midnapore district from Kandi in Murshidabad district, police said. Five of the deceased are Trinamool Congress workers of Murshidabad district, they added.
Cooch Behar: To woo the younger generation, the state government will set up swimming pools in every Sub-Division, Rabindra Nath Ghosh said on Tuesday. Ghosh said this after inaugurating the inter-state swimming competition at Toofangunj on Tuesday afternoon.Toofangunj MLA Fazal Karim Mian, Sabhadhipati of Coch Behar Zilla Parishad Puspita Ray Dakua and secretary Toofangunj Sub-division sports board secretary Mohan Saha were presentat the function.Ghosh said organising swimming competition is not the real motto, the main purpose is to attract the future generation to swimming.A swmming pool at an estimated cost of Rs 9 crore will come up beside the Cooch BeharRajbari Stadium. The first phase construction has been completed and the construction of the pool will be taken up shortly. Well known swimmers had recently taken part in the competition and it has successfully attracted many budding swimmers.
Pablo Picasso once said: ‘Every child is an artist. The problem is to remain an artist once they grow up.’ Inspired by these lines, artist Nehmat Mongia has created a genre of artworks that are truly unique. Curated by Shobha Broota, the artworks will be displayed as ‘Open Block, a flow of imagination’ at the Convention Center Foyer, The India Habitat Center, New Delhi from April 27 – 30.The 21-year old artist who is in the third-year graduation says, “The most powerful way of my expression is through Forms of Art. For me, it is as spontaneous as my imagination. The beautiful ensemble of nature created by the ‘creator’ is the provider for the inspiration of my artworks.” Also Read – Add new books to your shelf”Often, hearing my grandparents talk about how they would sleep under a sky full of stars or dance around in the rain without being worried about toxins pouring onto the Earth fascinated me.” She spent her schooling years discussing and working for many programmes related to issues of global warming, planting trees, spreading concepts of re-cycling/ re-use/ reduce, saving the tiger and banning of the use of plastic. Through her canvas, she still endeavors to create the simple small pleasures of life and that “we all may have missed out on” being the children of this millennium. Also Read – Over 2 hours screen time daily will make your kids impulsive”A search to find new forms within the matter of living or nonliving, which may have existed or may be striving to exist even today, kindled the curiosity within me, leading to this ensemble.”The Creator’s Ensemble uses the pen and pencil on canvas. This work of art is an amalgamation of realism, observation and imagination. It follows an academic study of ‘animals’ running towards a natural habitat, which has been created on the basis of observation with underlining realism. While on the other side of the forest are the ‘robotic figures’ of my imagination representing the creations of mankind themselves charging towards the forest, in turn, causing large-scale upheaval known to be as ‘Kalyug”. In addition, there are about 100 artworks – 8 inches by 8 inches each. Nehmat says she loves to explore a variety of mediums to innovate unique techniques to express herself. Since 2009, she has taken part in several art exhibitions and even displayed her works in France and Germany. Her many achievements include working as an Art Director, Assistant Director of Photography and Illustrations on making of the Film A Tribute to Vande Mataram.
In a world of Superman, Batman, Spiderman, or Wonder Woman, we have the wonderful Tintin, a cowlicked teenager from Belgium who doesn’t possess any superpowers but wins every fight and always does the right thing. He goes everywhere with his fox terrier, Snowy and sometimes gets help from his loyal friend Captain Haddock, the Thompson twins, and Professor Calculus.Edinburgh, UK – November 21, 2012: Close-up of an officially produced small plastic figurine of the fictional character Tintin. Tintin was created by the Belgian writer Georges Remi, who was better known by his pen name Hergé.Tintin travels around the world and acts in the name of justice by foiling bad criminals. He is one of the most beloved characters in Europe and even Charles de Gaulle once declared that Tintin was his only international rival, saying that “nobody notices, because of my height. We are both little fellows who won’t be got at by big fellows.”Tintin made his debut in January 1929 in Le Petit Vingtiéme, a kids’ supplement of a Belgian newspaper.Tintin and his fox terrier Snowy appeared for the first time on 10 January 1929.He was created by the Belgian artist Georges Remi, better known as Hergé, who never expected that his character would gain such popularity.Tintin appeared in an independent comic book that sold more than 200 million copies; on television; and even on the big screen, in the animated movie The Adventures of Tintin: The Secret of the Unicorn by Steven Spielberg.Believe it or not, Hergé was inspired by a real-life person for Tintin’s adventures. Although there is a debate about who is the real Tintin, many believe that it was Palle Huld.Palle Huld, during his trip around the world in 1928, almost certainly influenced Hergé to create Tintin.Back in 1928, the Danish newspaper Politiken came with a brilliant idea for a competition. To mark the centennial of Jules Verne, it offered the award of a globe-circling voyage, just as Phileas Fogg did in Around the World in 80 Days.The competition was opened only to teenage boys. The winner was to complete the voyage unaccompanied, without using planes, and due to safety reasons to return in 46 days instead of 80.Jules VerneThe 15-year-old Palle Huld, freckled, fresh-faced, with a turned up nose, won the prize and on March 1, 1928, he left Copenhagen. He traveled by rail and steamship through England, Scotland, Canada, Japan, Manchuria, the Soviet Union, Poland, and Germany.After 44 days Huld returned to his homeland and was greeted by a crowd of 20,000 admirers and his worried mother who, according to the Copenhagen Post “had been prescribed sleeping pills for the duration.”Vancouver, Canada – December 15, 2013: A statuette of the character Tintin against a lunar background. The model is created by Moulinsart.As soon as he got back, Huld wrote a book about his journey. The book was quite popular in Europe and was translated into several languages. Apparently, the book got in the hands of Hergé who decided to illustrate the story.Palle Huld went on to have a 40-year-long career as an actor in the Danish Royal Theatre and died in 2010 at the age of 98. It looks like he always believed to have been the inspiration for Tintin as he mentioned it on several occasions.Aix-en-Provence, France – May 31, 2014: A variety of French-language books are for sale at the popular Saturday market in Aix-en-Provence, France.However, there are people who dispute such claims. Pierre Assouline, the writer of a biography about the famous cartoonist in 1996 – Hergé: The Man Who Created Tintin – said that he had never heard of Mr. Huld. Hergé died in 1983 and never truly identified who or what was the inspiration for creating Tintin.Some people suggest that the real Tintin was actually the French travel photojournalist Robert Sexé. In fact, Tintin and Sexé have many similarities – they both rode a motorbike; both of them had a best friend, and both toured the same countries in the same order.Sexé toured the Soviet Union, the Congo, and the U.S., in exactly the same order as Tintin in the first three books.According to the BBC documentary Tintin’s Adventure with Frank Gardner, some of the photos that Sexé took on his travels match the scenery that Hergé drew, replacing Sexé with Tintin.Read another story from us: The Boys who Inspired the Character of Peter PanIn the end, it could have been both. Both Sexé and Huld sound like very brave and cool people who had interesting lives, immortalized through Tintin’s adventures.
On the bottom of the North Sea, salvage teams searching for shipping containers that fell off a merchant ship in a recent storm found a shipwreck of enormous historical value. They located a wreck from 1540 that may hold clues to a mystery researchers have been trying to solve for many years. “A lot of people think of the Dutch as a maritime nation, and this ship tells us something about how we became that nation,” said maritime and underwater archaeologist Martijn Manders. The ship was filled with a cargo of copper plates and some of them were displayed on April 3, 2019, the same day that the find was revealed.The wreck is being described as “the missing link” in shipping constructionIt was owned by the Fugger family, one of Europe’s richest banking families. The BBC reported that the wreck is being described as “the missing link” in shipping construction.AdChoices广告inRead invented by Teads“It’s the way the ship was built that’s very interesting because you have to think 100 years later the Netherlands was in the middle of its Golden Age — and this ship is from a transition period,” Manders told the BBC.Coat of Arms of the ‘Fugger of the Deer’Part of the reason why researchers have been able to identify this ship as one belonging to this transitional period is because of the way the timber was arranged.Although it is still on the seabed, divers intend to revisit the ship during the summer. It is considered to be the oldest seafaring ship ever found in Dutch waters.Great video to watch: Top 10 Famous Shipwrecks Throughout HistoryManders and his colleagues had been investigating a ship dating back to the 1590s for evidence of this technological transition to the Dutch Golden Age, but this new wreck puts the transition period at least 50 years earlier.Originally, the salvage teams were on the trail of the giant container ship MSC Zoe. It lost over 270 containers in January as it sailed from Portugal to Bremerhaven in Germany. Some containers and cargo washed up on German and Dutch beaches, but authorities were also searching the ocean for the missing freight.Ultra large container ship MSC Zoe navigates partly unloaded through river Scheldt towards AntwerpWhile sonar-scanning for the missing cargo, an unidentified object was spotted a few miles north of Terschelling, an island in the Wadden Sea. An underwater search located timber beams and copper plates, leading to an archaeological investigation.The archaeologists said that the timbers came from a smooth-hulled ship was 98 feet long and that the copper plates were its cargo. The Fugger family, a German mercantile dynasty, held a monopoly on copper production in the 16th century.Fugger EhrenbuchDescribing the discovery as a “lucky accident,” Education, Culture and Science Minister Ingrid van Engelshoven said to the media: “I am very curious about what information will be revealed – that is also the beauty of archaeology: it stimulates your curiosity and imagination. I think this find is an enrichment of Dutch heritage.”“It was filled with copper plates, which have the stamp of the Fugger family — one of the richest families in the world,” said Manders in a BBC interview. He traced the cargo’s route from the family’s copper mines in modern-day Slovakia and up the River Vistula to the Polish port of Gdansk. Its destination was the major port of Antwerp, in Belgium.10 Ducats (1621) minted as circulating currency by the Fugger Family“They were financing emperors and kings so they were enormously rich. They pushed away the Hanseatic traders so they hired Dutch ships to avoid working with them.”A copper expert from the Rijksmuseum in Amsterdam has identified the chemical substance in the cargo as identical to the first copper coins used in the Netherlands.Read another story from us: Viking Ship Discovered in Norway“Copper coins were at the time being developed as a lower-cost alternative to gold and silver, and it now appears that copper from the mines in Slovakia was being used as currency in the Netherlands,” according to the BBC.Nancy Bilyeau, a former staff editor at Entertainment Weekly, Rolling Stone, and InStyle, has written a trilogy of historical thrillers set in the Tudor era for Touchstone Books. Her new book, The Blue, is a spy story set in the 18th-century porcelain world. For more information, go to www.nancybilyeau.com
Elaine Quigley, CBR, CRS, GRI57 East Main Street, Suite 217Westborough, MA 01581EQuigley@ownnewengland.comBusiness: (508) 366-4266Cell: (508) 735-5161www.EQRE.comBy Elaine QuigleyYour home should be your sanctuary, but sometimes it’s hard to brush off the stress of the day and sink into the serenity. That’s especially true if your home is more chaos than calm. Use these tips to create a space that’s soothing, so, no matter what the day holds, you always have an inviting place to come home to.Add some greeneryStudies have shown that plants can make your home feel calmer and ease anxiety. Plants like jasmine and English ivy can improve sleep, lavender and rosemary can lower stress, and several other plants have been shown to improve air quality so you breathe easier.Hide the electronics“Nobody wants to stare at a tangle of cords,” said Houzz. “Thankfully, we have more options than ever for keeping our tech devices hidden away. When possible, choose smaller, wireless devices that look less obtrusive even when left out in the open. Tie up cords in a media center so they are not visible, and dedicate a single drawer to storing all of your chargers, power cords and small tech devices when they’re not in use.”Get a dogOr a cat, a bird, or a turtle, for that matter. Yes, having a pet can mean more noise and more mess. But, there are all kinds of studies that show that having a pet lowers stress. “Researchers found that pet-owning patients with high blood pressure could keep their blood pressure lower during times of mental stress than patients without pets,” said AnimalSmart.org. “Another study shows that pet owners may also have increased odds of surviving for at least a year after having a heart attack.”Clear the clutterGoing all Marie Kondo on your home can have surprising effects on your mental state. “Clutter can play a significant role in how we feel about our homes, our workplaces, and ourselves,” said psychologist Sherrie Bourg Carter in Psychology Today. “Messy homes and work spaces leave us feeling anxious, helpless, and overwhelmed.”Tone down the harsh colorsThere’s something to be said for going bold, but soft colors can bring on a calming feeling. If you want a deeper color, consider shades of blues and greens—two colors that are known to be more serene than, say bright yellow, orange or red.Clean up your entrywayIt’s the first place guests see, and while you probably don’t pass by or through your front entry all that often if you park in the garage, it may not feel as welcoming as you’d like when you do.Soften the lightingHarsh overhead lighting can make you feel like you’re being interrogated, and can also be hard on your eyes. If you need to keep it because the space will be too dark otherwise, a dimmer can at least give you some control over just how bright it is, and allow you to create a mood with lower lighting as needed.Limit the patterns“Opt for solids and subtle patterns,” said Houzz. “Busy patterns have their place, but if you’re aiming for calm, then solid fabrics are your friends. Don’t be afraid to include subtle patterns, though: herringbone, tone-on-tone stripes, and tiny dots can add textural interest without competing for attention.”Buy some fresh flowersAccording to a study by Rutgers, “The presence of flowers triggers happy emotions, heightens feelings of life satisfaction and affects social behavior in a positive way far beyond what was originally believed.”Make your master bedroom a zen zoneGetting good rest is key, and there are several ways you can create a soothing space. Keeping the colors serene is pivotal, and so is a good mattress. Loading the bed up with soft textures can also help. “The sensation of touch is often overlooked, but a powerful way to unwind.”Call me for all your real estate needs. I will put my years of experience in real estate to work for you…. knowledge, expertise, professionalism, reputation. 508-735-5161 Equigley@ownnewengland.com. Elaine Quigley, CBR, CRS, GRI57 East Main Street, Suite 217Westborough, MA 01581EQuigley@ownnewengland.comBusiness: 508-366-4266Cell: 508-735-5161www.EQRE.com
Advertisement Khabib Nurmagomedov forced Conor McGregor to tap out of their UFC 229 main event with a 4th round submission, but the stunning outcome was only the beginning of complete chaos. Immediately after the fight finished, the scene devolved into a post-fight riot when Khabib jumped out of the Octagon to attack UFC fighter, and McGregor teammate Dillon Danis, who was seated ringside talking trash.In the midst of the insanity, someone, believed to be from Khabib’s team, jumped into the Octagon and connected with a vicious punch to McGregors head while he had his back turned. Once things cooled down somewhat, Dana White opted not to give Khabib the belts in the Octagon, for fear that a full scale riot would break out. This is completely nuts.khabib vs everybodyGET SOME pic.twitter.com/zLTbjXf42X— Calhoun (@linkcalhoun) October 7, 2018 Here’s a view from the stands:Here’s the brawl with Khabib jumping the fence and going after Danis. You’ll see somebody go after McGregor in the cage. This is bad. pic.twitter.com/IpOZiZy5vC— Andreas Hale (@AndreasHale) October 7, 2018