Citation: Hella Good: Scientists Petition to Name a Very Large Number (2010, March 3) retrieved 18 August 2019 from https://phys.org/news/2010-03-hella-good-scientists-petition-large.html © 2010 PhysOrg.com As in, “That’s one hella big number.”In fact, there is a Facebook effort underway, with more than 20,000 students and scientists calling for this name. One of the instigators is Austin Sendek, a student in physics at the University of California. Fox News reports on his reasoning for naming the number hella:Sendek and his petition signatories believe naming numbers in the 10^27 category is of “critical importance for scientists in all fields.” He said these numbers are vital to representing “the wattage of the sun, distances between galaxies, or the number of atoms in a large sample.” …”However, science isn’t all that sets Northern California apart from the rest of the world,” Sendek wrote. “The area is also notorious for the creation and widespread usage of the English slang ‘hella,’ which typically means ‘very,’ or can refer to a large quantity (e.g. ‘there are hella stars out tonight’).”But will the International System of Units go for it? That’s the question. Calling something “yotta” sounds very like the name of the Star Wars character Yoda, so naming the next big number “hella” wouldn’t be so bad. Right? Plus, it would give science an “in” regarding popular culture. But, if numbers continue to get larger, what comes next? How could you express a number that is even bigger than hella? (PhysOrg.com) — As science becomes increasing precise, and as computers provide the ability to crunch ever larger (and smaller) numbers, scientists are looking to name numbers with lots of zeroes. You’ve heard of mega, giga and tera. You might have even heard of yotta — which is a one followed by 24 zeroes. But now some scientists are petitioning the International System of Units to create a binary prefix for a one followed by 27 zeroes. This number, they think, should be called “hella”. Image source: SPUI via Wikimedia Commons Explore further The battle between virus and host cell 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.
Though some might see it as farfetched, or heaven forbid, lunacy, Davis and Wagner are convinced that it’s worth the small amount of investment such a search would entail. What if, they suggest, close-up photographs of the moon that are already being made available to the masses (from NASA’s Lunar Reconnaissance Orbiter) via the Internet, were to be presented with a request that anyone that would like to participate, study whichever photos they find interesting, looking for anything that appears of unnatural origin, then report back. Interesting “finds” could then be studied by many others, and those that seem promising could be studied further by professionals. It all seems so easy, after all, other group projects are underway, and by most accounts, appear to meet with relative success.Another possibility, the team suggests, is using image or shape recognizing software to scan photos of the moon to help narrow down search areas and to alert humans when it finds something interesting.The idea of putting resources towards searching for the existence of intelligent alien life wouldn’t be new of course, the SETI project exists for that sole purpose. Looking for evidence that we’ve been visited by an extraterrestrial is of course a little different, but in this case, it seems to make sense. After all as Davis and Wagner point out, because the moon is so barren, has no atmosphere and because it is so seldom hit with meteorites, things that go on there are preserved for tens or even millions of years. If any aliens visited the moon during that time span, it should be possible to find traces of their activity, or their equipment, offering proof for the very first time, that there really is someone else out there. New calculations suggest Jupiter’s core may be liquefying (PhysOrg.com) — If you were part of a team sent to explore an unknown planet; and that planet had a natural orbiting moon, wouldn’t it make sense to use that moon as a base camp or remote observation post? Especially if you didn’t want those being observed to know you were there? Professor Paul Davis and research technician Robert Wagner think so, and that’s why they’ve published a paper in Acta Astronautica that suggests we humans begin taking a little closer look at our own moon to see if any alien life forms might have left behind some evidence of their visit. More information: Searching for alien artifacts on the moon, Acta Astronautica, In Press. doi:10.1016/j.actaastro.2011.10.022AbstractThe Search for Extraterrestrial Intelligence (SETI) has a low probability of success, but it would have a high impact if successful. Therefore it makes sense to widen the search as much as possible within the confines of the modest budget and limited resources currently available. To date, SETI has been dominated by the paradigm of seeking deliberately beamed radio messages. However, indirect evidence for extraterrestrial intelligence could come from any incontrovertible signatures of non-human technology. Existing searchable databases from astronomy, biology, earth and planetary sciences all offer low-cost opportunities to seek a footprint of extraterrestrial technology. In this paper we take as a case study one particular new and rapidly-expanding database: the photographic mapping of the Moon’s surface by the Lunar Reconnaissance Orbiter (LRO) to 0.5 m resolution. Although there is only a tiny probability that alien technology would have left traces on the moon in the form of an artifact or surface modification of lunar features, this location has the virtue of being close, and of preserving traces for an immense duration. Systematic scrutiny of the LRO photographic images is being routinely conducted anyway for planetary science purposes, and this program could readily be expanded and outsourced at little extra cost to accommodate SETI goals, after the fashion of the SETI@home and Galaxy Zoo via The Guardian Moon. Photo courtesy of NASA Explore further © 2011 PhysOrg.com Citation: ASU cosmologist suggests studying moon for alien artifacts (2011, December 26) retrieved 18 August 2019 from https://phys.org/news/2011-12-asu-cosmologist-moon-alien-artifacts.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: Researchers use magnets to cause programmed cancer cell deaths (2012, October 8) retrieved 18 August 2019 from https://phys.org/news/2012-10-magnets-cancer-cell-deaths.html More information: A magnetic switch for the control of cell death signalling in in vitro and in vivo systems, Nature Materials (2012) doi:10.1038/nmat3430AbstractThe regulation of cellular activities in a controlled manner is one of the most challenging issues in fields ranging from cell biology to biomedicine. Nanoparticles have the potential of becoming useful tools for controlling cell signalling pathways in a space and time selective fashion. Here, we have developed magnetic nanoparticles that turn on apoptosis cell signalling by using a magnetic field in a remote and non-invasive manner. The magnetic switch consists of zinc-doped iron oxide magnetic nanoparticles5 (Zn0.4Fe2.6O4), conjugated with a targeting antibody for death receptor 4 (DR4) of DLD-1 colon cancer cells. The magnetic switch, in its On mode when a magnetic field is applied to aggregate magnetic nanoparticle-bound DR4s, promotes apoptosis signalling pathways. We have also demonstrated that the magnetic switch is operable at the micrometre scale and that it can be applied in an in vivo system where apoptotic morphological changes of zebrafish are successfully induced. Breast cancer drug pushes colon cancer cells to their death A schematic representation of the magnetic switch for apoptosis signalling in in vitro cells and in a zebrafish. Credit: (c) Nature Materials (2012) doi:10.1038/nmat3430 © 2012 Phys.Org (Phys.org)—A team of researchers in South Korea has developed a method to cause cell death in both living fish and lab bowel cancer cells (in vivo and in vitro) using a magnetic field. The application of the magnetic field, as described in their paper published in the journal Nature Materials, triggers a “death signal” that leads to programmed cell death. Explore further A major problem with treating cancer is how to effectively and efficiently apply a therapy, one that discriminates between cancer and healthy cells: killing the bad while retaining the good. Numerous methods have been tried over the years with varying degrees of success. In this new research, the team has been experimenting with the introduction of iron oxide nanoparticles, which attach to antibodies, into the system. The antibodies, in turn, bind to tumor cell receptors. When a magnetic field is introduced, the nanoparticles bunch up or cluster, which triggers a natural response called a death signal. When that happens, apoptosis (aka, programmed cell death) occurs, causing destruction of the tumor. The work is based on apoptosis, a process that continually occurs in living organisms. This process is marked by biochemical events that lead to changes in cells causing their death; it is referred to as a programmed death because it controls the way cells grow in multi-cellular organisms. One clear example is the way cells between the fingers are allowed to die, while digits grow as individual members. Therefore, apoptosis is considered a healthy process as opposed to necrosis, where cells die due to trauma. Normally the process occurs when old or faulty cells are detected, such as when skin cells are damaged from exposure to the elements. When such cells are detected, chemicals are delivered which cause the cells to break apart, effectively killing them. In the present study, researchers took advantage of this process by causing such chemicals to be sent to tumor cells. The researchers applied zinc-doped iron oxide nanoparticles to colon cancer cells, which naturally bind to antibodies. Those antibodies then bind very strongly to what is known as the death receptor 4(DR4) which exists on DLD-1 colon cancer cells. When a magnetic field is applied, the death receptor sends out a signal telling the system to attack the cell. Chemicals are then sent, killing the tumor. In their experiment, the team found that more than half of the tumor cells exposed to the treatment were killed, while none of the untreated cells died. Unfortunately, other experiments with zebra fish resulted in the growth of abnormal tails. The team notes that their research is still in its infancy and that far more research will need to be done to see if the process can be refined and eventually tested in human trials. Journal information: Nature Materials 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.
© 2013 Phys.org (Phys.org) —Andrei Zlobin of the Russian Academy of Sciences’ Vernadsky State Geological Museum, claims in a paper he’s uploaded to the preprint server arXiv, that he’s found rocks he believe to be from the object that caused the Tunguska explosion over Siberia in 1908. If further analysis of the rocks confirms them to be from space, it will mark the discovery of the first physical evidence of the source of the famous blast. Journal information: arXiv More information: Discovery of probably Tunguska meteorites at the bottom of Khushmo river’s shoal, arXiv:1304.8070 [physics.gen-ph] arxiv.org/abs/1304.8070AbstractThe author describes some stones which he found at the bottom of Khushmo River’s shoal during 1988 expedition into the region of the Tunguska impact (1908). Photos of stones are presented. Three stones have traces of melting and the author consider these stones as probable Tunguska meteorites. Some arguments are presented to confirm author’s opinion. Results of investigation of prospect holes in peat-bogs are briefly described too. New data concerning heat impulse of the Tunguska impact are obtained. There is the assumption that some meteorites which are formed during comet impact looks like stony or glass-like thin plates with traces of melting. Credit: arXiv:1304.8070 [physics.gen-ph] Credit: arXiv:1304.8070 [physics.gen-ph] Citation: Russian researcher claims to have found rocks from object that caused Tunguska explosion (2013, May 3) retrieved 18 August 2019 from https://phys.org/news/2013-05-russian-tunguska-explosion.html Explore further The Tunguska Event, as it’s known, was a very powerful explosion that occurred in the air over a part of Siberia near the Podkamennaya Tunguska River. The force of it flattened forests for 2,150 square kilometers—it’s considered to be the largest impact event in modern history. Despite the immensity of the explosion, no debris from the object that caused it has ever been found—likely due to the remoteness of the impact zone and the political climate in Russia at that time. Even more mysterious is the lack of an impact crater. Because of the dearth of evidence, there has been a lot of speculation about what caused the explosion, with the two most likely candidates being a meteoroid or a comet. Research team claims to have found evidence Lake Cheko is impact crater for Tunguska Event 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 his paper, Zlobin says he dug some holes in the permafrost in an area believed to be near the center of the impact zone, back in 1988. He reports that he found nothing that could be tied to the explosion. Before returning home, however, he collected some rock samples from the bottom of a shoal on the Khushmo River and brought them back with him to the museum. Zlobin says he didn’t sort or examine the rock samples until twenty years later. He doesn’t say so, but perhaps it was the hundred year anniversary of the Tunguska Event that spurred him into action—in any case, he found three samples that he believes came from outer-space. He thinks so because they exhibit signs of both melting and ablations known as regmaglypts. Scientists believe the explosion was not hot enough to cause rocks on the ground to melt, thus, the melting of rocks in the area must have come as a result of the intense heat of passage through the Earth’s atmosphere.Zlobin says he believes the impact was caused by a comet, likely of a size close to Halley’s Comet. Further testing of the rocks will need to be done to confirm they came from outer-space, of course. If they come back positive, scientists will then have to debate amongst themselves whether they were part of the object that caused the Tunguska Event, or were a separate event altogether.
by NPR News Scott Neuman 8.28.19 6:01am China has said that it won’t allow a U.S. Navy warship to visit its northeastern port of Qingdao — marking the second time in recent weeks that Beijing has rebuffed what is a routine request, underscoring trade tensions with Washington and accusations that the U.S. is behind unrest in Hong Kong.In a statement on Wednesday, U.S. Seventh Fleet public affairs officer Cmdr. Reann Mommsen said China had “denied the US Navy’s request.” She did not name the warship in question and referred questions about the reason for the decision to Beijing.The refusal to allow the visit comes as Beijing and Washington are locked in a bitter trade war and Chinese officials have cast a wary eye on increasing anti-government violence in Hong Kong, where pro-democracy protests have gone on for months.Beginning last year, President Trump has ratcheted up tariffs on Chinese imports and Beijing has retaliated by slapping its own tariffs on U.S. goods.At the G-7 Summit in France, which concluded on Monday, Trump said Chinese trade officials had contacted their U.S. counterparts asking to “get back to the table” and hammer out a trade deal, but China’s Foreign Ministry spokesman Geng Shuang said Tuesday he had not heard of any such contact.Also on Tuesday, China’s official Xinhua media accused the U.S. of “the old tricks of bullying and maximum pressure” which it said were aimed at “[coercing] China into accepting its irrational demands.”Meanwhile, in Hong Kong, where protests that began peacefully in early June have grown into a direct challenge to Beijing’s authority in the city, China has accused the U.S. of aiding the protesters and fomenting unrest.Earlier this month, China also denied without explanation a request for two U.S. warships, the USS Lake Erie, a guided missile cruiser, and the USS Green Bay, an amphibious transport, to call at Hong Kong.At the time, U.S. Pacific Fleet spokesman Cmdr. Nate Christensen said the Navy has “a long track record of successful port visits to Hong Kong and we expect them to continue.”Although such requests are considered routine courtesies, it is also not unusual for them to be denied in times of heightened tensions between host and guest.Last September, China turned down a request for an amphibious assault ship, USS Wasp, to call at Hong Kong, citing U.S. arms sales to Taiwan. However, two months later it approved a similar request for a visit by the aircraft carrier USS Ronald Reagan.Copyright 2019 NPR. To see more, visit NPR. Amid Tensions, Beijing Denies U.S. Navy Request To Call At… Mark Schiefelbein
Sunday evening, it was west Delhi’s turn to hog the limelight. The highlight of the day? A stand-up act called A’Sardar, which was a comedy gig presented by two most funniest sardars — Maheep Singh and Vikramjit Singh.The performance was a part of the ongoing Atelier ACT Festival which is a workshop of communication enthusiasts who have been organising creative educational programmes and devising socially relevant plays. It has conducted various workshops on creative teaching and creative learning. Also Read – ‘Playing Jojo was emotionally exhausting”We are continuously devising and designing specific learning enhancement programmes for special educators and are incorporating creative drama and theatre-in-education techniques,’ said a member of the group.’A’sardar, the word itself has a dual connotation. It refers to asardar (catalyst to change) sardars. Dedicated to the ones who are performing and the ones who are witnessing it. We are sardars but not the usual typical ones,’ said Maheep.His act mostly took a dig at regular mishaps in a Also Read – Leslie doing new comedy special with Netflixsardar’s life. Like how a sardar is always greeted by specific terms like balle balle or paaji instead of his regular name or how he gets served sarso ka saag and makke ki roti even in an Italian restaurant and how he is much scarier than a scarecrow (toy) to horrify little children to manage them,’ laughed Maheep.Vikramjit’s act on the other hand started with a disclaimer note claiming — the jokes today are offensive but you need not worry since they are in English. He tickled the funny bone with his uncanny yet humourous remarks on fitness freaks seen at gyms, how shopping is not a natural thing (unlike what women call it) which should be solely replaced by lots of sex and food (much natural and pleasurable) and the advertisements on TV.Vikramjit has been doing stand up for over an year now, and says that he derives his punches from the daily problems he deals with in life.’Instead of ruminating over them, I make a joke out of them. Just like how batting comes to Sachin,’ Vikramjit said.’Comedy for me is being in the moment and suit according to the scene. I am a big believer in laughing at oneself. Then only you can succeed in bringing a few laughs,’ Maheep signed off.
Kolkata: There was trouble at a private school in Durgapur on Thursday after guardians staged a sit-in demonstration demanding suspension of a teacher who had beaten up a four-year-old student.A large contingent of police went to the spot to maintain peace.On Monday, a teacher had beaten up a four-year-old student of Kindergarten I for spending more time in the toilet. After she came back from the toilet, the teacher beat her up with a stick and slapped her repeatedly. Also Read – Heavy rain hits traffic, flightsThe girl bled through the left year. Later, she was taken to a hospital where she was treated. On Tuesday, when the parents of several students met the Principal, she assured a thorough investigation into the matter.On Wednesday, the guardians gathered outside the school and demanded stern action against the teacher. However, the school authorities refused to talk to the guardians.The guardians again gathered outside the school campus on Thursday morning demanding suspension of the teacher. Initially, Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedthe school authorities refused to see them but later they agreed to meet the parents of the affected student. The guardians of other students refused to accept this proposal and later parents of six students went to see the Principal.The Principal told them that the concerned teacher had resigned. Not satisfied with this, the parents continued to demand her suspension. They told the Principal that they would not accept it as it was just an eyewash because she will be inducted to another branch of the school. The parents organised a sit-in demonstration outside the school premises to voice their demand.
Star comedian Kapil Sharma’s New Year resolution is to get legendary singer Lata Mangeshkar and cricket icon Sachin Tendulkar to be part of his hit show Comedy Nights With Kapil, where megastar Amitabh Bachchan, superstars Shah Rukh Khan and Salman Khan and several of the young brigade of actors have made an appearance.Kapil took to micro-blogging site Twitter to share his resolution and even invited requests from fans for his wish to become a reality. “My resolution n dream for 2015… I want @mangeshkarlata @sachin_rt AN @SrBachchan sahib again.. It’s up to u people.. Pls send requests..,” Kapil tweeted Monday. In response to his tweet, Kapil received several requests from people who expressed a desire to see the same.
Kolkata: The state Cabinet has given approval to the creation of more than 500 posts in its meeting on Monday.The meeting, headed by Chief Minister Mamata Banerjee, was held in the state Secretariat. Most of the posts, creation of which received the Cabinet’s approval, is in the state Health department which will ensure better service to the common people.Around 1,000 posts were created in the last Cabinet meeting that held on May 22 and it led to the creation of jobs in different departments including Finance, Home and Hill Affairs, Agriculture and Higher Education. Also Read – Heavy rain hits traffic, flightsIt may be mentioned that in almost all the Cabinet meetings, the state government has been creating several posts to ensure job opportunities for athe youth. In November 2017, around 1,200 new posts were created in different departments of the state government including 200 drivers and helpers for the Transport department. The state government has also created thousands of job opportunities in the past seven years. In June 2017 alone, the announcement of creating 3,754 new posts was made. According to a senior official at the state Secretariat, the next Cabinet meeting is scheduled to be held on June 21.
Rare photos of screen icon Marilyn Monroe, taken just weeks before her untimely death, are going to auction in London. The stunning snapshots were taken by her friend, photographer George Barris, on Santa Monica beach on July 13, 1962, just three weeks before she was found dead at 36 in her Los Angeles bedroom.Eight of the prints, several of which show Monroe romping on the beach in a towel or bikini, are expected to sell for 8000