Phononic Computer Could Process Information with Heat

first_imgA thermal transistor controls heat flow. Heat passes between terminals S and D for the “on” state, and little or no heat passes between S and D for the “off” state. G is the control terminal. Image credit: Wang and Li. Most computers today use electrons to carry information, while theoretical optical computers use photons. Recently, physicists from Singapore have proposed a third type of computer: a “phononic computer,” which would use heat, carried by phonons, to perform operations similar to its electronic counterpart. Citation: ‘Phononic Computer’ Could Process Information with Heat (2007, November 2) retrieved 18 August 2019 from https://phys.org/news/2007-11-phononic.html “Heat is very abundant and very often it is regarded as useless and harmful for information processing,” Professor Baowen Li of the National University of Singapore told PhysOrg.com. “The merit of our paper is that we demonstrate that, in addition to the existing electrons and photons, the phonons can also perform a similar function. This provides an alternative way for information processing. Moreover, the heat can be harnessed to use.”Li and co-author Lei Wang from the NUS have demonstrated how to make thermal logic gates for possible use in future phononic computers, with their results published in a recent issue of Physical Review Letters. Logic gates, one of the basic elements of computers, perform an operation on one or more logic inputs to produce a single logic output. In electronic logic gates, the inputs and outputs are represented by different voltages. However, in a thermal logic gate, the inputs and outputs are represented by different temperatures. The key element of the logic gate is the thermal transistor (which was invented by Li’s group last year), which works similar to how a field-effect transistor controls electric current. The thermal transistor is composed of two terminals that are weakly coupled, plus a third control terminal. “Like all other theoretical modeling, we use heat bath to produce heat, which is a kind of random atomic or molecular motion,” Li explained. “To conduct heat, you don’t need too much external power. Any temperature difference will lead to heat conduction.”In the researchers’ model, heat is conducted by lattice vibration. When the vibration spectra of the two terminals are combined, their overlap determines the heat current. For example, when the two spectra overlap, the heat can easily travel between the terminals, representing the “on” state. When the vibration spectra do not overlap, very little heat (or no heat) passes through, representing the “off” state. The “negative differential thermal resistance” (NDTR) that occurs due to the match/mismatch of vibrational spectra of the terminals’ interface particles, makes the “on” and “off” states both stable, making the thermal logic operations possible. 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.center_img Fast and selective optical heating for functional nanomagnetic metamaterials Explore further “Like we explain in our Physical Review Letters article, all these logic gate functions can be achieved only when the system has the so-called negative or super response, by which we mean that the large temperature difference (change) will induce the small heat current,” Li said. “This is the so-called ‘negative differential thermal resistance.’” The NDTR phenomenon was also discovered by Li’s group in 2006.The researchers demonstrate how combining thermal transistors can be used to build different thermal logic gates, such as a signal repeater. A signal repeater “digitizes” the heat input, so that when the temperature is higher or lower than a critical value, the output is either “on” or “off,” but not in between. By connecting a few thermal transistors in series, the researchers achieved a nearly ideal repeater. Besides signal repeaters, they also demonstrated a NOT gate, which reverses the input signal, and an AND/OR gate, made from the same thermal transistor model.While the current model simply shows the feasibility of thermal logic gates, Wang and Li predict that an experimental realization of the devices in nanoscale systems may not be too far off. They point out that another thermal device, the solid-state thermal rectifier, was experimentally demonstrated in 2006, just a few years after the proposed theoretical model.“One advantage of a phononic computer might be that we don’t need to consume a lot of electricity,” Li said. “We may use the redundant heat produced by electronic devices or provided by Mother Nature to do useful work. Another advantage is that, one day, human beings can control and use heat wisely so that we may save a lot of energy—which is a big issue nowadays.”More information: Wang, Lei, and Li, Baowen. “Thermal Logic Gates: Computation with Phonons.” Physical Review Letters 99, 177208 (2007). Copyright 2007 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com.last_img read more

Variations in finestructure constant suggest laws of physics not the same everywhere

first_img 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. An X-ray image of the quasar PKS 1127-145, located about 10 billion light-years from Earth. Credit: NASA. The physicists, John Webb from the University of New South Wales and his coauthors from Swinburne University of Technology and the University of Cambridge, used data from two telescopes to uncover the spatial dependence of the fine-structure constant. Using the north-facing Keck telescope in Mauna Kea, Hawaii, and the south-facing Very Large Telescope (VLT) in Paranal, Chile, the researchers observed more than 100 quasars, which are extremely luminous and distant galaxies that are powered by massive black holes at their centers.By measuring the quasar spectra, the researchers could gather data on the frequency of the electromagnetic radiation emitted by quasars at high redshifts, corresponding to a time about 10 billion years ago. During the time the light traveled through space to reach the telescopes, some of it was absorbed at specific wavelengths by very old gas clouds that today can reveal the chemical composition of the clouds. The cloud compositions could help the scientists determine the fine-structure constant in those areas of the universe at that time, since alpha is a measure of the strength of the electromagnetic force between electrically charged particles. As the coupling constant for the electromagnetic force, it is similar to the constants for the other three known fundamental forces of nature: the strong nuclear force, the weak nuclear force, and gravitational force. Among its important implications, alpha determines how strongly atoms hold on to their electrons. By combining the data from the two telescopes that look in opposite directions, the researchers found that, 10 billion years ago, alpha seems to have been larger by about one part in 100,000 in the southern direction and smaller by one part in 100,000 in the northern direction. The data for this “dipole” model of alpha has a statistical significance of about 4.1 sigma, meaning that that there is only a one in 15,000 chance that it is a random event. Play This video shows the path of light as a beam as it travels from the quasar, through an intervening galaxy and then to the Earth where we capture it with our telescopes. The inset shows the quasar spectrum as it is redshifted (due to the expansion of the universe as it travels) and as it is imprinted with the absorption signature of the intervening galaxy. • PhysOrg.com iPhone / iPad Apps• PhysOrg.com Audio Podcasts / iTunes• PhysOrg.com Android apps (new version available)• Join PhysOrg.com on Facebook!• Follow PhysOrg.com on Twitter! Explore further PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen Illustration of the dipolar variation in the fine-structure constant, alpha, across the sky, as seen by the two telescopes used in the work: the Keck telescope in Hawaii and the ESO Very Large Telescope in Chile. Copyright Dr. Julian Berengut, UNSW, 2010. May be used with appropriate attribution.center_img Explained: Why many surveys of distant galaxies miss 90 percent of their targets At first, the data surprised Webb and his colleagues, since it seemed to contradict previous results that the scientists had published in 1999. At that time, the scientists had used the north-facing Keck telescope to find that alpha became slightly smaller the further away (and older) the quasars were. So when the scientists first looked at equally distant quasars from the southern hemisphere using the VLT, they were surprised to find the slight increase in alpha. After eliminating any possible bias, though, they realized that they were looking at hemispherical differences of alpha.While the data from just one telescope seemed to suggest that alpha varies in time, data from the two telescopes show that alpha also seems to vary in space. Such a discovery could have major implications, starting with shattering the basic assumption that physical laws are the same everywhere in the universe. The results also violate the Einstein Equivalence Principle, and suggest that the universe may be much larger than currently thought – or even infinite in size. Right now, the scientists want to confirm the results with other experimental methods, and see if the fine-structure constant could truly lead scientists to a very different understanding of our universe. (PhysOrg.com) — One of the most controversial questions in cosmology is why the fundamental constants of nature seem fine-tuned for life. One of these fundamental constants is the fine-structure constant, or alpha, which is the coupling constant for the electromagnetic force and equal to about 1/137.0359. If alpha were just 4% bigger or smaller than it is, stars wouldn’t be able to make carbon and oxygen, which would have made it impossible for life as we know it to exist. Now, results from a new study show that alpha seems to have varied a tiny bit in different directions of the universe billions of years ago, being slightly smaller in the northern hemisphere and slightly larger in the southern hemisphere. One intriguing possible implication is that the fine-structure constant is continuously varying in space, and seems fine-tuned for life in our neighborhood of the universe. Citation: Variations in fine-structure constant suggest laws of physics not the same everywhere (2010, September 6) retrieved 18 August 2019 from https://phys.org/news/2010-09-variations-fine-structure-constant-laws-physics.html More information: J. K. Webb, et al. “Evidence for spatial variation of the fine structure constant.” Submitted to Physical Review Letters. Available at arXiv:1008.3907v1 [astro-ph.CO] © 2010 PhysOrg.comlast_img read more

Microsoft gets busy on fix for IE watering hole attack

first_img More information: technet.microsoft.com/en-us/se … ity/advisory/2794220 CFR is described as a nonpartisan think tank focused on American foreign policy and international affairs. FireEye said the initial JavaScript hosting the exploit only served the exploit to browsers with an OS language as either U.S. English, Chinese (China), Chinese (Taiwan), Japanese, Korean, or Russian.Microsoft described the nature of the vulnerability as a “remote code execution vulnerability that exists in the way that Internet Explorer accesses an object in memory that has been deleted or has not been properly allocated. The vulnerability may corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user within Internet Explorer. An attacker could host a specially crafted website that is designed to exploit this vulnerability through Internet Explorer and then convince a user to view the website.”Outside Microsoft, security bloggers are referring to the attack on the CFR website as a “watering hole attack.” In this type of activity, the attackers identify specific targets and scout out which sites they frequently visit. Attackers then plant malware on them. As Kaspersky Lab’s Threatpost similarly explains, it is “where a website frequented by topically connected subjects is infected with malware hoping to snare those site visitors in drive-by attacks.”Symantec views the metaphor of a watering hole fitting, as “the attack is similar to a predator waiting at a watering hole in a desert. The predator knows that victims will eventually have to come to the watering hole, so rather than go hunting, he waits for his victims to come to him. Similarly, attackers find a Web site that caters to a particular audience, which includes the target the attackers are interested in. Having identified this website, the attackers hack into it using a variety of means. The attackers then inject an exploit onto public pages of the website that they hope will be visited by their ultimate target. Any visitor susceptible to the exploit is compromised and a back door Trojan is installed onto their computer.”Microsoft has responded with mitigations and workarounds. The company said the IE team is working on a security update but in the interim it recommended that IE8 customers block the current attacks by disabling Javascript, which will prevent the vulnerability from being triggered initially, and disabling Flash, which will prevent ActionScript-based heap spray from preparing memory such that the freed object contains exploit code. Microsoft said also that “disabling the ms-help protocol handler and ensuring that Java6 is not allowed to run will block the ASLR bypass and the associated ROP chain.” Microsoft is working on a Fix-It protection tool as well as security update. Users of IE9 and 10 are not susceptible to the attacks. “We want to reiterate the IE9 and IE10 are not affected and that we currently see only very targeted attacks,” Microsoft stated. Citation: Microsoft gets busy on fix for IE watering hole attack (2013, January 1) retrieved 18 August 2019 from https://phys.org/news/2013-01-microsoft-busy-hole.html Explore further © 2013 Phys.orgcenter_img (Phys.org)—Microsoft has published a security advisory about a vulnerability in Internet Explorer 6, 7, and 8. “We are only aware of a very small number of targeted attacks at this time,” a Microsoft team blog said. The company acknowledged the vulnerability in its Microsoft Security Advisory (2794220) published on Saturday. Reports about the problem pointed to affected users who had visited the Council of Foreign Relations (CFR) website. According to network security company FireEye, “we can also confirm that the CFR website was also hosting the malicious content as early as Friday, December 21.” Internet Explorer users are warned against Poison Ivy 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.last_img read more

Team announces construction of a formal computerverified proof of the Kepler conjecture

first_img More information: code.google.com/p/flyspeck/wik … AnnouncingCompletionvia Newscientist 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. Computer generated math proof is too large for humans to check It was back in 1611 that Johannes Kepler first suggested in a paper he’d written (after corresponding with Thomas Harriot) that if you want to stack cannon balls on a ship’s deck in the most efficient way possible (a question originally posed by Sir Walter Raleigh), the best way to do it is in a pyramid shape. Cut to 1998 when Hales completed work on his written proof (which included portions that could only be verified by computer). But it was huge, as many mathematical proofs tend to be—300 pages in all that took 12 reviewers four years to verify. A 99 percent certainty rating wasn’t enough for Hales, however, so he launched the Flyspeck Project to create a means for proving the proof correct using a computer.Hales and his team used two software tools that have been created for the sole purpose of verifying proofs—HOL Light and Isabelle—they work by checking the logic of statements made in the proof. Now after eleven years of work, the team has announced that they’ve succeeded in their endeavor. Hales’ original proof has been converted to code the computer can work with and the software checkers found no discrepancies, which means the proof of the conjecture has been verified.The success by the team highlights a growing movement of using computers to verify proofs that human beings have created giving the results more credence. Computers have also been used to construct original proofs for some basic problems, which suggests that someday in the not-too-distant future, computers will be doing all the heavy work, leaving mathematicians to ponder the deeper questions regarding what the proofs represent and how they can be used in real world applications. Citation: Team announces construction of a formal computer-verified proof of the Kepler conjecture (2014, August 13) retrieved 18 August 2019 from https://phys.org/news/2014-08-team-formal-computer-verified-proof-kepler.html (Phys.org) —A team of researchers led by the man, Thomas Hales, who came up with written proof of the Kepler conjecture is now reporting that they have constructed a formal proof of the conjecture, which implies the use of a computer. The announcement was made on The Flyspeck Project page, and puts to rest any doubts about the correctness of the proof done by Hales in 1998. Explore further © 2014 Phys.org One of the diagrams from Strena Seu de Nive Sexangula, illustrating the Kepler conjecturelast_img read more

Separate studies suggest current pause in global warming likely the last

first_img Explore further Observed and simulated change in global-mean surface temperature. Credit: Nature Climate Change (2014) doi:10.1038/nclimate2355 Global warming ‘pause’ since 1998 reflects natural fluctuation, study concludes © 2014 Phys.org Citation: Separate studies suggest current “pause” in global warming likely the last (2014, September 2) retrieved 18 August 2019 from https://phys.org/news/2014-09-current-global.html Most scientists agree that the current pause we are experiencing with global warming is likely due to the ocean serving as a massive heat sink (and a small amount of cooling due to volcanic eruptions). Most also agree that the time is coming soon when the oceans will stop absorbing the excess heat, ending the pause we are experiencing and allowing global temperatures to rise again.The team in Japan has found, using climate records and models, that natural variations in temperature over the past thirty years have had less of an influence on the overall warmth of the planet than in the past, suggesting, that pauses such as we are now experiencing will have less and less of an impact going forward if the atmosphere continues to heat up. More specifically, their models show that during the 1980’s natural atmospheric temperature variations accounted for roughly half of temperature changes that were seen. In the 1990’s the percentage fell to just 38 percent and then to 27 percent after the turn of the century. Heading into the future, they predict, warming due to human activities will account for more and more of the changes in temperatures, leaving less variability due to natural causes such as the one that led to the pause we are now experiencing.The team in Australia ran 31 environmental models and came to the conclusion that if greenhouse gas emissions continue at their current rate, the likelihood of another pause in global warming drops to near zero. Even worse, they suggest that the extra heat that has been pulled into the world’s oceans is likely to be released causing a speed-up of global warming. Their models show that even if there is a major volcanic event of the magnitude of Krakatau, for example, the outcome remains the same, a constant increase in global temperatures, i.e. no hiatuses or pauses along the way.Both groups suggest the catastrophic impact of global warming in the not-too-distant future as seen in their dire predictions can be averted if we act now as a global community to reduce greenhouse gas emissions. Journal information: Nature Climate Change 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. , Geophysical Research Letters (Phys.org) —Two different research groups working independently have come to the same conclusion, the current pause we’ve experienced in global warming (since 1997) is very likely the last we’re likely to see if current greenhouse gas emission trends continue. One team, with members from several research centers in Japan, has published their findings in the journal Nature Climate Change. The other, based at the University of New South Wales, in Australia, has published their findings in Geophysical Research Letters. More information: 1. Contribution of natural decadal variability to global warming acceleration and hiatus, Nature Climate Change (2014) DOI: 10.1038/nclimate2355AbstractReasons for the apparent pause in the rise of global-mean surface air temperature (SAT) after the turn of the century has been a mystery, undermining confidence in climate projections. Recent climate model simulations indicate this warming hiatus originated from eastern equatorial Pacific cooling4 associated with strengthening of trade winds5. Using a climate model that overrides tropical wind stress anomalies with observations for 1958–2012, we show that decadal-mean anomalies of global SAT referenced to the period 1961–1990 are changed by 0.11, 0.13 and −0.11 °C in the 1980s, 1990s and 2000s, respectively, without variation in human-induced radiative forcing. They account for about 47%, 38% and 27% of the respective temperature change. The dominant wind stress variability consistent with this warming/cooling represents the deceleration/acceleration of the Pacific trade winds, which can be robustly reproduced by atmospheric model simulations forced by observed sea surface temperature excluding anthropogenic warming components. Results indicate that inherent decadal climate variability contributes considerably to the observed global-mean SAT time series, but that its influence on decadal-mean SAT has gradually decreased relative to the rising anthropogenic warming signal.2. Maher, N., A. Sen Gupta, and M. H. England (2014), Drivers of decadal hiatus periods in the 20th and 21st centuries, Geophys. Res. Lett., 41, DOI: 10.1002/2014GL060527.AbstractThe latest generation of climate model simulations are used to investigate the occurrence of hiatus periods in global surface air temperature in the past and under two future warming scenarios. Hiatus periods are identified in three categories: (i) those due to volcanic eruptions, (ii) those associated with negative phases of the Interdecadal Pacific Oscillation (IPO), and (iii) those affected by anthropogenically released aerosols in the mid-twentieth century. The likelihood of future hiatus periods is found to be sensitive to the rate of change of anthropogenic forcing. Under high rates of greenhouse gas emissions there is little chance of a hiatus decade occurring beyond 2030, even in the event of a large volcanic eruption. We further demonstrate that most nonvolcanic hiatuses across Coupled Model Intercomparison Project 5 (CMIP5) models are associated with enhanced cooling in the equatorial Pacific linked to the transition to a negative IPO phase.last_img read more

Giant hydrogen cloud spotted around the Triangulum Galaxy

first_imgThe outline of M33s neutral hydrogen disk is shown in black, with all of the discrete detected clouds overlaid. The figure was made by integrating the flux over the velocity range of each cloud, then filling in the lowest contour. The central velocity of each cloud was used so the colours are indicative of this velocity. Velocities shown are relative to M33. Credit: Keenan et al., 2016. 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. The detection was made by a team of astronomers led by Olivia C. Keenan of the Cardiff University, U.K. The researchers used a set of data provided by the Arecibo Galaxy Environment Survey (AGES) that utilizes the Arecibo Telescope in Puerto Rico. AGES is a neutral atomic hydrogen survey aimed at searching for galaxies in different areas of the local universe. The scientists have analyzed the data from AGES to look at the neutral hydrogen distribution around M33. Investigating this area, they were searching for any hydrogen clouds that could be starless dwarf satellites of the galaxy. Due to the proximity of M33 and the high quality of AGES data, the team could easily detect new clouds around this galaxy.”It wasn’t too difficult to detect clouds around M33. What was more difficult was working out whether the clouds were part of the disk of M33, near M33 but unattached, or whether they were, in fact, related to our Milky Way galaxy. This meant we had to study each cloud in a lot of detail to work out if it was associated with M33,” Keenan told Phys.org.The team managed to detect 11 new clouds. They also found out that many previously detected clouds are actually part of the low neutral hydrogen disk of M33. However, they were not able to identify any stars associated with these clouds.”We now know a lot about where the gas is around M33 and what it looks like. M33 has an extended neutral hydrogen gas disk which is larger than the optical galaxy as it extends further than the stars. This disk is warped and has lots of clumpy dense regions, which may hint towards a past close encounter with the Andromeda galaxy. M33 also has a population of gas clouds which don’t have any stars associated with them. This is interesting, as we don’t know how these clouds of gas got there, or why they don’t have stars,” Keenan said.According to the study, the largest cloud found by the researchers, designated AGESM33-31, is the most intriguing one. It has a diameter of nearly 60,000 light years and a neutral hydrogen mass of about 12 million solar masses. If the cloud is at the distance of M33, it is larger in size than the galaxy.”We have found a large ring-shaped cloud which appears to be about as big as M33 itself,” Keenan noted.The origin of AGESM33-31 is yet to be determined. One of the hypotheses proposed by the team is that this cloud is the further extension of the Magellanic Stream. The researchers also suppose that the cloud could be the remnants of a dark galaxy that has been disrupted. However, these explanations do not account for the hole observed in this ring-shaped feature.”We have investigated the possibility that this hole may have been formed by a supernova, but found it to be around an order of magnitude too large for this to be a satisfactory explanation. AGESM33-31 remains an interesting and intriguing object, we would need additional observations to allow us to make further comment on its nature,” the scientists wrote in a paper.Keenan concluded that although the Arecibo Telescope is excellent to look for gas around nearby galaxies, a more powerful observatory, like the Square Kilometer Array (SKA), would be needed to continue the search in more remote locations.”We hope that as telescopes improve we will be able to detect more gas around galaxies, and see gas around galaxies which are further away. When the Square Kilometer Array telescope is complete it will be great for this kind of work,” she said.SKA is an international project to built a network of radio telescopes in Australia and South Africa. These telescopes will be tens of times more sensitive and hundreds of times faster at mapping the sky than today’s best radio astronomy facilities. First observations are currently scheduled for 2020. Explore further Citation: Giant hydrogen cloud spotted around the Triangulum Galaxy (2016, May 12) retrieved 18 August 2019 from https://phys.org/news/2016-05-giant-hydrogen-cloud-triangulum-galaxy.html More information: The Structure of Halo Gas Around M33, arXiv:1605.01628 [astro-ph.GA] arxiv.org/abs/1605.01628AbstractUnderstanding the distribution of gas in and around galaxies is vital for our interpretation of galaxy formation and evolution. As part of the Arecibo Galaxy Environment Survey (AGES) we have observed the neutral hydrogen (HI) gas in and around the nearby Local Group galaxy M33 to a greater depth than previous observations. As part of this project we investigated the absence of optically detected dwarf galaxies in its neighbourhood, which is contrary to predictions of galaxy formation models. We observed 22 discrete clouds, 11 of which were previously undetected and none of which have optically detected counterparts. We find one particularly interesting hydrogen cloud, which has many similar characteristics to hydrogen distributed in the disk of a galaxy. This cloud, if it is at the distance of M33, has a HI mass of around 10^7 Msun and a diameter of 18 kpc, making it larger in size than M33 itself. Image: Our flocculent neighbour, the spiral galaxy M33 © 2016 Phys.org (Phys.org)—While peering into the nearby Triangulum Galaxy known as M33, astronomers have detected what appears to be a giant cloud of hydrogen around it. According to research published online on May 5 on the arXiv pre-print server, the cloud is extremely large, even bigger than the galaxy itself. The discovery could improve our knowledge about the distribution of gas in and around galaxies.last_img read more

Archeologist claims to have found proof that Hebrew was the first written

first_imgCredit: Douglas Petrovich (Phys.org)—Douglas Petrovich, an archaeologist with Ontario’s Wilfrid-Laurier University in Canada has sparked controversy in the ancient history scholarly community by making claims that he has found proof that Hebrew is the world’s oldest alphabet. He has been speaking to media outlets in conjunction with the self-publication of a book he has written regarding his findings called simply World’s Oldest Alphabet. © 2016 Phys.org 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. In interviews, Petrovich claimed that he has found evidence of Israelites in Egypt who converted 22 hieroglyphics into a Hebrew alphabet more than 3,800 years ago. Not everyone in the scholarly community is convinced, however.Most scholars of ancient times agree that the world’s oldest alphabet was probably Semitic, but they have not been able to come to a consensus regarding which it might be. Petrovich contends that converting hieroglyphics into an alphabet was an attempt by those who spoke Hebrew to find a way to create their own written expressions during the time it is believed Israelites lived in Egypt; he claims it predates any other known written alphabet. He notes that he has been working on his research since 2012. He started by translating Middle Egyptian inscriptions on stone tablets along with inscriptions on other tablets (including Sinai 115) that appeared to be precursors or actual examples of a Hebrew alphabet. To conduct his translations, Petrovich has combined letters previously identified from some other scholars with some of his own interpretations—a method that may make it difficult for others in the field to accept his findings. Another point of controversy is the source he offers for dating some of his references—the Bible. He further claims that after assembling the early Hebrew alphabet, he was able to use it to translate 16 Hebrew inscriptions that up till now have been indecipherable. He claims he found references to Moses that aligned with biblical references, and Ahisamach and Asenath, two other biblical figures. He also claims to have found the word “Hebrew.”Petrovich acknowledges that there will be skeptics and even suggests that they attempt to prove or disprove his findings in their own way, insisting that if what he has found is correct then eventually others will come to the same conclusion.center_img Alphabet stone found near Jerusalem Citation: Archeologist claims to have found proof that Hebrew was the first written alphabet (2016, December 8) retrieved 18 August 2019 from https://phys.org/news/2016-12-archeologist-proof-hebrew-written-alphabet.html Explore furtherlast_img read more

Suicide attempts are hard to anticipate A study that tracks teens cellphone

first_imgEvery Wednesday afternoon, an alert flashes on the cellphones of about 50 teenagers in New York and Pennsylvania. Its questions are blunt: “In the past week, how often have you thought of killing yourself?” “Did you make a plan to kill yourself?” “Did you make an attempt to kill yourself?” The 13- to 18-year-olds tap their responses, which are fed to a secure server. They have agreed, with their parents’ support, to something that would make many adolescents cringe: an around-the-clock recording of their digital lives. For 6 months, an app will gobble up nearly every data point their phones can offer, capturing detail and nuance that a doctor’s questionnaire cannot: their text messages and social media posts, their tone of voice in phone calls and facial expression in selfies, the music they stream, how much they move around, how much time they spend at home. Read the whole story: Sciencelast_img read more

Central level administrative review meet to be held on May 8 CM

first_imgKolkata: The Central level administrative review meeting of the state government is going to be held on May 8.The meeting will be held at Nabanna Sabhaghar. Sources said that the meeting will start from 1.30 pm. Chief Minister Mamata Banerjee will be taking stock of the progress of different projects in the state.This is the second Central level administrative review meeting that is going to be held in Nabanna Sabhaghar. The first meeting was held here on September 4 in 2017 and on the same day, the state-of-the-art auditorium adjacent to Nabanna was inaugurated. Also Read – Heavy rain hits traffic, flightsIt may be mentioned that before the venue of the meeting was shifted to Nabanna Sabhaghar, the Central level administrative review meeting used to be held at Town Hall. It may be mentioned that the new venue, with a seating capacity of around 1,000 people, is more spacious compared to Town Hall.It may be mentioned that the Chief Minister visits every district to take stock of the progress of different projects and holds district level administrative review meetings. She also holds the Central level administrative review meeting in Kolkata. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedMinisters and top brass of all departments, senior administrative and police officers and senior officers from districts will be present in the Central level administrative review meeting. The Chief Minister will take stock of the progress of work undertaken by each department. She will also discuss different issues of the departments and the projects taken up by them.It may be recalled that after the last Central level administrative review meeting in September 2017, the Chief Minister had raised her concern over the thirty thousand pending court cases, which was leading to a huge amount of recurring cost to the state government. She had also directed the concerned departments to take necessary steps in this regard.Meanwhile, the meeting of the state plan for the 2019-20 financial year was held in the state secretariat on Thursday. The meeting was led by Chief Secretary Malay De. Senior officials of all the departments attended the meeting, in which there was preliminary discussion on planning of each of the departments for the next financial year.last_img read more

Oppn MPs to march to Prez House against Land Bill

first_imgUpping their ante against the land bill, MPs of several opposition parties are planning to take out a march to Rashtrapati Bhavan next Tuesday to register their protest against the amendments proposed to be carried out in the Act of 2013. JD(U) chief Sharad Yadav is coordinating with other parties like Congress, TMC, SP, BSP, DMK and Left parties to organise the protest march, sources said here on Friday. “It is proposed to be a march of non-NDA MPs to the Rashtrapati Bhavan… Sharad Yadav is coordinating,” a source said. Congress has expressed its willingness to participate in the march, the sources said. The land bill was passed by the Lok Sabha three days back after the government carried out nine amendments and persuaded most of its allies to support it.last_img read more

Goods likely to become pricey as truckers go on indefinite strike

first_imgKolkata: With trucks going off the road due to the all-India strike protesting against the steep hike in diesel price, there are apprehensions of essential goods becoming expensive. But according to the experts, its effect can only be realised if the strike continues for more than 48 hours.Truck owners have gone for the strike, protesting against the Centre’s indifference towards bringing down the price of diesel. There are around 45 lakh trucks in the state. Also Read – Heavy rain hits traffic, flightsWith trucks going off the road, both export and import of goods have come to a stop. There are several goods including fish and onion which need to be imported from other states. There will not be much effect if the truck strike is withdrawn within the next 48 hours. But the prices of essential commodities, mainly of the ones which need to be exported from outside, would go up if it continues even after 48 hours. Most importantly, the stock of the commodities that need to be imported would run out if the strike continues. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedSince there should not be any effect on the prices of essential goods in the next 48 hours, there will be strict vigilance at all the markets in the city to ensure that prices of commodities do not go up unnecessarily and lead to inconvenience of common people. There are some occasions in the state as well, on Tuesday. So, the steps have been taken to ensure that prices of goods do not go up.The state government has also taken necessary steps to ensure that middlemen do not get the opportunity to increase the prices of essential goods in this span of time. It may be mentioned that the last meeting of the task force took place on June 6 and the concerned officials were directed to take necessary steps so that prices of essential goods do not go up without any valid reason.In the same meeting, directions were given to ensure that the prices of potato and onions, a large quantity of which have to be imported from Nasik, do not go up.Stress was also given to increase the state’s production of the commodities that have to be imported from other states.Representatives of the truck owners have, however, claimed that they would continue with their strike if the demands are not met.last_img read more

Tollywood actor found dead in Siliguri hotel

first_imgKolkata: Payel Chakraborty, an aspiring television actress, was found hanging in a hotel room in Siliguri on Wednesday morning.Police have already started a thorough probe into the death, though prima facie investigation has revealed that she had committed suicide.According to police sources, Payel had checked into a hotel on Church Road in Siliguri on Tuesday evening and claimed to have come there from Kolkata.She was carrying two bags and informed the hotel staff that she had come there for the purpose of visiting Gangtok. She was staying in room number 213 of the hotel. Also Read – Rain batters Kolkata, cripples normal lifeOn conditions of anonymity, a hotel staff said Payel told them that she was carrying her dinner and so they should not call her unless there is any emergency.She further informed that she would leave for Gangtok on Wednesday morning. At around 11 am on Wednesday, when it was time for room cleaning service, the hotel staff knocked repeatedly on her door but it went answered.The hotel manager then informed Siliguri police. A team rushed to the hotel and at around 12 noon, the door that was bolted from inside was broke open. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedShe was found hanging from the ceiling fan with the help of a piece of cloth. The body was taken to Siliguri District Hospital where she was declared brought dead. The police immediately contacted her family members on the basis of the address and contact number provided for the hotel register. However, no suicide note was found from her room.Payel, who had acted in a number of television serials, made a special appearance in Dev starrer film ‘Cockpit’. Her film ‘Kelo’ is supposed to release this month where she played the role of a doctor. Her next film ‘Chaturtha Ripu’ is also scheduled for release by the end of this year.Preliminary investigations revealed that Payel was suffering from severe mental stress.She got divorced recently and is survived by a son. “She always acted with absolute dedication and professionalism and didn’t give the slightest inkling of any problem. I still cannot believe that she is no more. Within a few months, we had become very good friends,” one of her co-actress in the film — ‘Kelo’ said.last_img read more

HC upholds Mamatas Rs 10000 cash grant for Puja organisers

first_imgKolkata: Disposing of the Public Interest Litigation (PIL) against the state government’s grant to Durga Puja organisers, the Calcutta High Court on Wednesday decided not to interfere into the matter as the legislature is the right forum to take decision on the government’s expenditure.With the Court’s direction in this connection, there is no restriction anymore for the state government in giving the grant of Rs 10,000 to each of the Puja organisers. Around 28,000 Puja organisers in the state will be receiving the grant. Also Read – Rain batters Kolkata, cripples normal lifeThe Division Bench of acting Chief Justice Debasish Kar Gupta and Justice Sampa Sarkar has, however, mentioned that the Court can interfere later.It may be mentioned that it was October 5 when the High Court put a stay on the state government’s decision to give the grant to the Durga Puja organisers.Refusal of the High Court to interfere into the matter related to the state government’s grant to Durga Puja organisers and disposal of the PIL, the interim stay on the same gets vacated, allowing the state government to initiate the task of distributing cheques among the Puja organisers. Steps have been taken for the distribution through local police stations. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedSources said that steps have been taken on an immediate basis after the High Court’s decision in this connection, so that the grant can be utilised for traffic safety campaigns during the Puja.It may be recalled that Chief Minister Mamata Banerjee had announced that Rs 10,000 will be given to each of the Durga Puja organizers, while addressing a programme at Netaji Indoor Stadium. Accordingly, the Puja organisers had also planned to campaign in a big way for creating awareness on traffic safety. Now with the Court’s order, the Puja organisers can carry on with their plans for the same.Firhad Hakim, the state Urban Development and Municipal Affairs minister, said: “It is not a matter of winning or losing a court case. I thank the Calcutta High Court as the aim of a section of people to restrict the growth of Bengal has not been fulfilled.”last_img read more

Being Kasturbas voice

first_imgIt takes courage to become the voice of the submissive, in revealing the dark side of the man, who has been tagged as the ‘mahatma.’ Neelima Dalmia Adhar, who earlier wrote best-selling novel ‘father dearest’, took a bold step to unravel the character of Mohandas as a sexually driven, self-righteous and overbearing husband, through her book ‘The Secret Diary of Kasturba’. The spellbinding chronicle of Kasturba’s life speaks of Mohandas Karamchand Gandhi, who was sworn to poverty, celibacy and cause for India’s freedom. Completely eclipsed by the man who almost became the God for India’s multitude, the efforts of Kasturba as a wife and a mother went ignorant. She spent sixty-two years of her life juggling the roles of a devoted wife, a satyagrahi and sacrificing mother. Also Read – Add new books to your shelfOriginally written in English, ‘The secret diary of Kasturba’ was recently translated into Hindi and launched during an event at the Oxford Book store. Vinod dua, a senior journalist, held a discussion with the author about her book, the idea behind writing it and her connection with the main character.Talking about her wish to write about a strong woman character set in the pre/post independence era, Neelima said, “Kasturba’s story was very close to my heart. We share a lot of commonality in the sense that we belong to quite similar family backgrounds. Moreover, though I was not directly involved in the freedom struggle, the remnants of the time still resonated in my life. My father was a close associate of Gandhi and my mother led the life of Kasturba. So the cry of Kasturba as a wife of Gandhi was quite similar to the cry of Dinesh Nandani (my mother).” Also Read – Over 2 hours screen time daily will make your kids impulsive”My father was a megalomaniac with six wives and 18 children. When I started reading out about Kasturba, I found some startling revelations of her life. The more I tuned into her voice, the more I heard her cry. I was compelled to create this character which the history has forgotten. Kasturba came easily to me. Moreover the time was right because we are ready to receive the deconstruction of MAHATMA,” added Neelima.She considers finding the documented material on Kasturba as the biggest challenge. Also, she could not just accuse the ‘father of nation’ without considerable proof as it would for sure hurt the sentiments of his followers. Stating the process of creating the virtual character of Kasturba, Neelima said, “I was handicapped. I had a big challenge finding documented material on her. I tried to gather facts from a various book written on Gandhi and thereby tried to deduce the facts to know what kind of a person she was. Based on the facts I created a sculpture and gave it my voice. Towards the end, I was able to find a woman who was fearless, strong and passionate. She did not like what was happening to her but she let her get into the mould of her life.” The book reveals the trauma she went through when the decision of celibacy was forced on her without consent. The mention of the startling incidences about Gandhi’s arbitrariness, the painful phase of living alone without her husband (when he was in South Africa), the feelings of jealousy, insecurity and possessiveness rising out of his closeness with other women like Mira Bai and Sarla Devi – niece of Rabindranath Tagore, everything is indicative of the never ending misery of Kasturba’s life.last_img read more

Capturing the visible and invisible

first_imgAlliance Française de Delhi in association with International Women Photographers Association (IWPA) will present an exhibition titled ‘International Women Photographers Awards- Edition 2018’.The exhibition will be on view from August 4-12 at Galerie Romain Rolland, Alliance Française de Delhi every day from 11 am – 8 pm.It’s an exhibition showcases the works of 11 photographers who have been selected from the 60 short-listed candidates.More than 600 women photographers from 82 countries have submitted their entries to the International Women Photographers Award (IWPA). Also Read – Add new books to your shelfThe results demonstrate the outstanding success of the IWPA award around the world as the selected photographers come from the Middle East, Europe, Asia and South America.This exhibition is a display of photographs taken from each photographer’s series. The participants could choose between either the ‘free theme’ or the IWPA theme 2018 ‘Visible/Invisible’.The final list of the selected photographers include names like Loulou Daki – Swedish, Annalisa Natali Murri – Italian, Estelle Lagarde – French, Tahmineh Monzavi – Iranian, Elahe Abdolahaba – Iranian, Alice Mann – South African, Shu-Chen Chen – Taiwanese and Marylise Vigneau – French among others. Also Read – Over 2 hours screen time daily will make your kids impulsiveOne of the finalists Constanza Portnoy, a participant from Argentina will be displaying her series titled ‘Force of Life’ in the upcoming exhibition. Her powerful and deeply moving series will portray the lives of people with disabilities.On speaking about her series she says, “I feel excited, honoured and very happy, especially because in Argentina it is very difficult to raise awareness about this issue.”It is unfortunate that the rights of people with disabilities are very vulnerable over there.”last_img read more

As soon as BJP is ousted from Centre their growth will die

first_imgKolkata: Soon after addressing an election rally in the South Kolkata Lok Sabha constituency, Trinamool Congress chief Mamata Banerjee gave a brief interview to The Wire’s founding editor Siddharth Varadarajan and its Calcutta-based contributor Himadri Ghosh.In the interview, she discussed the possible outcomes of the election on May 23, accused Narendra Modi of political vendetta and also touched upon how the BJP’s so-called growth will come down drastically once they are ousted from the Centre. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataExcerpts: SV: Well, the 2019 election, Narendra Modi has been the face, the voice, the name that has dominated the campaign. And you have been perhaps the most forthright in directly challenging him. You say no matter what happens, Narendra Modi must go. Why do you believe that this one person’s ouster is so crucial to this election? MB: He’s not only a fascist, he’s an egoist. He has tremendous political vendetta. I used some harsh words today. But they are not harsh words. They are politically strong, bold words. Because, you know, we respect our great son of the soil, Ishwar Chandra Vidyasagar, very much. We are celebrating 200 years this year. But the goons, the BJP goons from the Amit Shah rally, they have totally destroyed Vidyasagar’s statue… These type of people must go from this country. They must go from politics. The politician should know what is politics. Politics means sacrifice. Politics means dedication, determination, devotion. But if you think politics means “goondaism”, hooliganism, fair enough… In a democracy, everybody has the right to speak. Also Read – Lightning kills 8, injures 16 in stateSV: Does it worry you that in Bengal, in a very short duration of time, the BJP has emerged as your principal challenger? The Left does not seem to be in the race. MB: Not at all, somebody will be the opposition. In a democratic setup, somebody will be ruling party, somebody will be opposition. I may be number one, but they may be number two, three or four. It is the CPM’s business, that CPM’s goons, they are joining the BJP, because the BJP is giving… to them also. So it is their matter. I don’t mind who will come as the second person. I will certainly try that I must be first. HG: Madam, we have seen for some time, people from the CPM are now marching under the BJP flag. Who do you blame for this? MB: I am telling you, this is not growth. This is absolutely not growth. This happens when the BJP is in power in the Centre. They use the situation. There, they work through agencies, so there is some growth. If the BJP is not in power, then this growth will die in a second. It is temporary. SV: In the event that the BJP falls short by a significant number… how will you… MB: We will not support the BJP. SV: Under any circumstances? MB: No.last_img read more

Skin hair care tips for summers

first_imgWith the switch in season from a colder to a warmer climate, it is crucial to change your hair care and skincare routine. Experts list some skin and hair care tips: Hydration is the key: It is essential to drink plenty of water and keep hydrating ourselves as water flushes out the toxins and keeps our skin glowing. It’s wise to carry a moisturiser and home-made flavoured water in your bag and keep hydrating your skin and body throughout the day. Also Read – Add new books to your shelfSunblock is a must: Never step out of the house without applying a good sunblock with the right SPF value. While most of us are aware of the importance of sunblock, it is equally important to use the right amount of the product. Apply sunblock at least 15-20 minutes before you step outside, and if needed keep reapplying the product. It is advisable to apply sunblock every day even if you are at home as sun rays enters at our home as well. In-salon treatments: You can also go an extra mile by getting an anti-dullness or a de-tanning facial done once in a month to help your skin fight the summer heat in a better way. Giving our skin extra nourishment to reduce the dryness or decrease the tan can be extremely helpful. Also Read – Over 2 hours screen time daily will make your kids impulsiveExfoliation: It helps in removing the dead skin cells that can damage your skin texture and give you an even skin tone. Cleaning the skin regularly with a hydrating face wash and exfoliator is a must. Cleansing and refreshing the skin are important during summer to remove sweat and oil deposits. Avoid using heat tools: The summer heat tends to make your hair sweaty and the humidity makes it frizzy. Thus, you should avoid using heat styling products like hair iron or the blow dryer in summer as they add to the heat. Use hair hydrating and frizzy controlling products: Summer also makes your hair very dry and frizzy. Using the right products with ingredients that can help nourish the dry and frizzy hair by providing it with moisture is important. Also use serums and leave-ins that further help in dealing with the frizz, protect from humidity and provide that extra boost of nourishment. Shampoo and condition: Washing your hair every day in the summer can be a problem as it makes your scalp dry and leads to loss of moisture. In this situation, do not forget to condition; it is a crucial step to maintain health of the hair.last_img read more

Philly Handling This Years Raptors Playoff Extinction Instead of LeBron

first_imgPhilly handling this year’s Raptors’ playoff extinction instead of LeBronThe Raptors got Canada’s hopes up again this year with another great regular season and the addition of Kawhi Leonard, but look over-matched against a clearly more talented Sixers team.Without LeBron in the Eastern Conference to perform his annual Raptors extinction, Philly looks prepared to take the torch and bounce Toronto, again. Guests:Chris Broussard, Rob Parker, Jason McIntyre, Albert Breer, Chris Haynes Also:-Patriots’ PED is Brady’s “Performance Enhancing Deal”-Conspiracy theory watch on refs in Rockets/Warriors Game 3-Lakers need to give LeBron control like Clevelandlast_img read more

Inside the Parker Yelichs 5030 Shot Pat Mahomes on Patrick Mahomes Baseball

first_img<span data-mce-type=”bookmark” style=”display: inline-block; width: 0px; overflow: hidden; line-height: 0;” class=”mce_SELRES_start”></span><span data-mce-type=”bookmark” style=”display: inline-block; width: 0px; overflow: hidden; line-height: 0;” class=”mce_SELRES_start”></span>This week on Inside the (Rob) Parker, Rob gives looks at Christian Yelich’s shot to become the first 50 HR, 30 SB player ever, why Joe Maddon is probably done with the Cubs, and why Tito Francona deserves credit for the Indians coming back to take the AL Central lead after appearing dead in the water. He also names his Top 3 MLB Teams of the Week, this week’s ‘Twitter Trash Talk’ Winner, ‘Foul or Fair’ and the Analytic Stat of the Week.Guests: Pat Mahomes – Former MLB pitcher discusses his son, NFL MVP Patrick Mahomes’ baseball career, and why he thought he would make it in baseball over football; Jason Beck – Tigers’ beat writer for MLB.com discusses everything that’s gone wrong for Detroit during a brutal season, and the decline of Miguel CabreraNew Inside the Parker: Former MLB pitcher Pat Mahomes tells @RobParkerFS1 he always thought NFL MVP @PatrickMahomes would go pro in baseball over footballDownload, subscribe, rate:iHeart: https://t.co/DTqbzFnDpJiTunes: https://t.co/W2E2D82B4Y pic.twitter.com/XUamvnOFqa— TheHerdNow (@TheHerdNow) August 14, 2019Download and subscribe to Inside the Parker and all of the Herd Podcast Network podcasts, exclusively at TheHerdNow.com, iHeart Radio and Apple Podcasts.last_img read more

Keep On Growing

first_img 3 min read April 1, 2007 Free Workshop | August 28: Get Better Engagement and Build Trust With Customers Now Opinions expressed by Entrepreneur contributors are their own. Enroll Now for Free For storefront retailers, foot traffic is the key to higher sales. But when it comes to finding products to sell on eBay, it’s all about the eyes.As opposed to the limited floor and wall space of a brick-and-mortar location, retailers on eBay find new customers with good photography, well-written product descriptions and of course, great products, all of which buyers can see from their own computers at home or work.”In a five- to seven-day listing, we’ll get hundreds of people looking at a specific guitar,” says Tommy Colletti, owner of The Music Zoo (eBay User ID: themusiczoo), a high-end guitar shop in Little Neck, New York. “At my store, it might take a year just to get 100 [people] to look.” Colletti’s specialty and custom guitars can cost thousands of dollars, which limits his regional customer base. Now, as The Music Zoo is booming online, musicians can find–and buy–his products from anywhere in the world. After almost four years on the site, Colletti, 41, reaps sales of up to $75,000 a month. “eBay just kick-started everything for us,” he says.Many retailers keep separate inventories for their physical stores and what they show on eBay. For these businesses, eBay is mostly a way to diversify, test out new products to gauge demand, reduce inventories of seasonal or outdated merchandise and unload product returns and irregulars. Experimenting with new products often brings retailers to new suppliers, including different wholesalers, distributors and manufacturers. Trade shows provide a quick immersion in a new market and instant access to hundreds of new contacts. Online wholesale portals are another useful source, as is eBay itself, where you can find job lot sellers in a variety of product categories.If diversification is the goal, many retailers will find that eBay can help narrow down which products to source. Greg Holden, a writer and eBay PowerSeller in Chicago (eBay User ID: byte-writer), suggests using eBay as a market research tool before expanding to different brand types. First, he says, choose the product type, then search for completed items using a specific price range. “This enables you to see what people really like on eBay,” says Holden, author of 1000 Best eBay PowerSeller Secrets. “The more research you do, the more items you’ll find that regularly sell for hundreds of dollars.” But sticking to the tried-and-true works, too. Colletti’s online and store-based inventory is about the same, but he does notice that some items do better in the eBay Marketplace than others. “If it’s a specialty piece, we think ‘this is perfect for eBay,'” says Colletti. “[At the store], it will get lost among the 1,000 other guitars we have.”Sometimes the shift to online commerce is an adjustment for the suppliers of established retailers. Colletti says he was surprised by the reluctance of some manufacturers. “Some of them think it makes the product look cheap,” says Colletti, who overcomes this obstacle by promising not to list items below the manufacturer’s suggested retail price. “My response to that is I never saw a Ferrari on eBay I thought was cheap.” This hands-on workshop will give you the tools to authentically connect with an increasingly skeptical online audience.last_img read more