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Showing posts with label Science and Engineering. Show all posts
Showing posts with label Science and Engineering. Show all posts

Tuesday, 30 April 2013

A letter from the frustrated author of a journal paper

If scientific writing is an art, replying to a reviewer can be your masterpiece.
And this is what frustration can do to you: A letter from a frustrated author to a journal paper. The amusement is guaranteed (I laughed so much).














Dear Sir, Madame, or Other:
Enclosed is our latest version of Ms. #1996-02-22-RRRRR, that is the re-re-re-revised revision of our paper. Choke on it. We have again rewritten the entire manuscript from start to finish. We even changed the g-d-running head!
Hopefully, we have suffered enough now to satisfy even you and the bloodthirsty reviewers.
I shall skip the usual point-by-point description of every single change we made in response to the critiques. After all, it is fairly clear that your anonymous reviewers are less interested in the details of scientific procedure than in working out their personality problems and sexual frustrations by seeking some kind of demented glee in the sadistic and arbitrary exercise of tyrannical power over hapless authors like ourselves who happen to fall into their clutches.
We do understand that, in view of the misanthropic psychopaths you have on your editorial board, you need to keep sending them papers, for if they were not reviewing manuscripts they would probably be out mugging little old ladies or clubbing baby seals to death. Still, from this batch of reviewers, C was clearly the most hostile, and we request that you not ask him to review this revision. Indeed, we have mailed letter bombs to four or five people we suspected of being reviewer C, so if you send the manuscript back to them, the review process could be unduly delayed.


Some of the reviewers comments we could not do anything about. For example, if (as C suggested) several of my recent ancestors were indeed drawn from other species, it is too late to change that. Other suggestions were implemented, however, and the paper has been improved and benefited. Plus, you suggested that we shorten the manuscript by five pages, and we were able to accomplish this very effectively by altering the margins and printing the paper in a different font with a smaller typeface. We agree with you that the paper is much better this way.
One perplexing problem was dealing with suggestions 13-28 by reviewer B. As you may recall (that is, if you even bother reading the reviews before sending your decision letter), that reviewer listed 16 works that he/she felt we should cite in this paper. These were on a variety of different topics, none of which had any relevance to our work that we could see. Indeed, one was an essay on the Spanish-American war from a high school literary magazine. The only common thread was that all 16 were by the same author, presumably someone whom reviewer B greatly admires and feels should be more widely cited. To handle this, we have modified the Introduction and added, after the review of the relevant literature, a subsection entitled ``Review of Irrelevant Literature'' that discusses these articles and also duly addresses some of the more asinine suggestions from other reviewers.
We hope you will be pleased with this revision and will finally recognize how urgently deserving of publication this work is. If not, then you are an unscrupulous, depraved monster with no shred of human decency. You ought to be in a cage. May whatever heritage you come from be the butt of the next round of ethnic jokes. If you do accept it, however, we wish to thank you for your patience and wisdom throughout this process, and to express our appreciation for your scholarly insights. To repay you, we would be happy to review some manuscripts for you; please send us the next manuscript that any of these reviewers submits to this journal.
Assuming you accept this paper, we would also like to add a footnote acknowledging your help with this manuscript and to point out that we liked the paper much better the way we originally submitted it, but you held the editorial shotgun to our heads and forced us to chop, reshuffle, hedge, expand, shorten, and in general convert a meaty paper into stir-fried vegetables. We could not or would not  have done it without your input.

Source: http://marialuisaaliotta.wordpress.com/2012/09/08/when-publishing-gets-tough-letter-from-a-frustrated-author/


Friday, 23 November 2012

Human Brain, Internet, and Cosmology: Similar Laws at Work?







The structure of the universe and the laws that govern its growth may be more similar than previously thought to the structure and growth of the human brain and other complex networks, such as the Internet or a social network of trust relationships between people, according to a new paper published in the science journal Nature's Scientific Reports.
"By no means do we claim that the universe is a global brain or a computer," said Dmitri Krioukov, co-author of the paper, published by the Cooperative Association for Internet Data Analysis (CAIDA), based at the San Diego Supercomputer Center (SDSC) at the University of California, San Diego. "But the discovered equivalence between the growth of the universe and complex networks strongly suggests that unexpectedly similar laws govern the dynamics of these very different complex systems."
Having the ability to predict -- let alone trying to control -- the dynamics of complex networks remains a central challenge throughout network science. Structural and dynamical similarities among different real networks suggest that some universal laws might be in action, although the nature and common origin of such laws remain elusive.
By performing complex supercomputer simulations of the universe and using a variety of other calculations, researchers have now proven that the causal network representing the large-scale structure of space and time in our accelerating universe is a graph that shows remarkable similarity to many complex networks such as the Internet, social, or even biological networks.
"These findings have key implications for both network science and cosmology," noted Krioukov. "We discovered that the large-scale growth dynamics of complex networks and causal networks are asymptotically (at large times) the same, explaining the structural similarity between these networks."
"This is a perfect example of interdisciplinary research combining math, physics, and computer science in totally unexpected ways," said SDSC Director Michael Norman. "Who would have guessed that the emergence of our universe's four-dimensional space-time from the quantum vacuum would have anything to do with the growth of the Internet? Causality is at the heart of both, so perhaps the similarity Krioukov and his collaborators found is to be expected."
Of course the network representing the structure of the universe is astronomically huge -- in fact it can be infinite. But even if it is finite, researchers' best guess is that it is no smaller than 10250 atoms of space and time. (That's the digit 1 followed by 250 zeros.) For comparison, the number of water molecules in all the oceans in the world has been estimated to be 4.4 x 1046.
Yet the researchers found a way to downscale this humongous network while preserving its vital properties, by proving mathematically that these properties do not depend on the network size in a certain range of parameters, such as the curvature and age of our universe.
After the downscaling, the research team turned to Trestles, one of SDSC's data-intensive supercomputers, to perform simulations of the universe's growing causal network. By parallelizing and optimizing the application, Robert Sinkovits, a computational scientist with SDSC, was able to complete in just over one day a computation that was originally projected to require three to four years.
"In addition to being able to complete these simulations much faster than previously ever imagined, the results perfectly matched the theoretical predictions of the researchers," said Sinkovits.
"The most frequent question that people may ask is whether the discovered asymptotic equivalence between complex networks and the universe could be a coincidence," said Krioukov. "Of course it could be, but the probability of such a coincidence is extremely low. Coincidences in physics are extremely rare, and almost never happen. There is always an explanation, which may be not immediately obvious."
"Such an explanation could one day lead to a discovery of common fundamental laws whose two different consequences or limiting regimes are the laws of gravity (Einstein's equations in general relativity) describing the dynamics of the universe, and some yet-unknown equations describing the dynamics of complex networks," added Marián Boguñá, a member of the research team from the Departament de Física Fonamental at the Universitat de Barcelona, Spain.
The other researchers who worked on this project are Maksim Kitsak, CAIDA/SDSC/UC San Diego; and David Rideout and David Meyer, Department of Mathematics at UC San Diego.
This research was supported by multiple grants, including Defense Advanced Research Projects Agency (DARPA) grant number HR0011-12-1-0012; NSF grants number CNS-0964236 and CNS-1039646; Cisco Systems; Foundational Questions Institute grant number FQXi-RFP3-1018; George W. and Carol A. Lattimer Campus Professorship at UC San Diego; Office of the Ministry of Economy and Competitiveness, Spain (MICINN) project number FIS2010-21781-C02-02; Generalitat de Catalunya grant number 2009SGR838; and by the Catalan Institution for Research and Advanced Studies (ICREA) Academia Prize funded by the Generalitat de Catalunya, Spain.

Monday, 19 November 2012

Children Who Swim Start Smarter


Children who learn how to swim at a young age are reaching many developmental milestones earlier than the norm.


Researchers from the Griffith Institute for Educational Research surveyed parents of 7000 under-fives from Australia, New Zealand and the US over three years.
A further 180 children aged 3, 4 and 5 years have been involved in intensive testing, making it the world's most comprehensive study into early-years swimming.
Lead researcher Professor Robyn Jorgensen says the study shows young children who participate in early-years swimming achieve a wide range of skills earlier than the normal population.
"Many of these skills are those that help young children into the transition into formal learning contexts such as pre-school or school.
"The research also found significant differences between the swimming cohort and non-swimmers regardless of socio-economic background.
"While the two higher socio-economic groups performed better than the lower two in testing, the four SES groups all performed better than the normal population.
The researchers also found there were no gender differences between the research cohort and the normal population.
As well as achieving physical milestones faster, children also scored significantly better in visual-motor skills such as cutting paper, colouring in and drawing lines and shapes, and many mathematically-related tasks. Their oral expression was also better as well as in the general areas of literacy and numeracy.
"Many of these skills are highly valuable in other learning environments and will be of considerable benefit for young children as they transition into pre-schools and school."
The study is a joint project between Griffith University, Kids Alive Swim Program and Swim Australia.
Report: http://www.griffith.edu.au/__data/assets/pdf_file/0019/470251/early-year-swim-interim-report-2012.pdf

Using Rust and Water to Store Solar Energy as Hydrogen


How can solar energy be stored so that it can be available any time, day or night, when the sun shining or not? EPFL scientists are developing a technology that can transform light energy into a clean fuel that has a neutral carbon footprint: hydrogen. The basic ingredients of the recipe are water and metal oxides, such as iron oxide, better known as rust. Kevin Sivula and his colleagues purposefully limited themselves to inexpensive materials and easily scalable production processes in order to enable an economically viable method for solar hydrogen production. The device, still in the experimental stages, is described in an article published in the journal Nature Photonics.














Scientists are producing hydrogen from sunlight, water and rust. They’re paving the way for an economic and ecological solution for storing renewable energy. (Credit: Image courtesy of Ecole Polytechnique Fédérale de Lausanne)

The idea of converting solar energy into hydrogen is not a new one; researchers have been working on it for more than four decades. During the 1990s, EPFL joined the fray, with the research of Michaël Grätzel. With a colleague from University of Geneva, he invented the photoelectrochemical (PEC) tandem solar cell, a technique for producing hydrogen directly from water. Their prototypes shared the same basic principle: a dye-sensitized solar cell -- also invented by Michael Grätzel -- combined with an oxide-based semiconductor.
The device is completely self-contained. The electrons produced are used to break up water molecules and reform the pieces into oxygen and hydrogen. In the same liquid, two distinct layers in the device have the job of generating electrons when stimulated by light; an oxide semiconductor, which performs the oxygen evolution reaction, and a dye-sensitized cell, which liberates the hydrogen.
The most expensive part? The glass plate
The team's latest prototype focused on resolving the main outstanding problem with PEC technology: its cost. "A U.S. team managed to attain an impressive efficiency of 12.4%," says Sivula. "The system is very interesting from a theoretical perspective, but with their method it would cost 10,000 dollars to produce a 10 square centimeter surface."
So the scientists set themselves a limitation from the start -- to use only affordable materials and techniques. It wasn't an easy task, but they managed. "The most expensive material in our device is the glass plate," explains Sivula. The efficiency is still low -- between 1.4% and 3.6%, depending on the prototype used. But the technology has great potential. "With our less expensive concept based on iron oxide, we hope to be able to attain efficiencies of 10% in a few years, for less than $80 per square meter. At that price, we'll be competitive with traditional methods of hydrogen production."
The semiconductor, which performs the oxygen evolution reaction, is just iron oxide. "It's a stable and abundant material. There's no way it will rust any further! But it's one of the worst semiconductors available," Sivula admits.
Silicon-enhanced nano-rust
That's why the iron oxide used by the team is a bit more developed than what you'd find on an old nail. Nanostructured, enhanced with silicon oxide, covered with a nanometer-thin layer of aluminum oxide and cobalt oxide -- these treatments optimize the electrochemical properties of the material, but are nonetheless simple to apply. "We needed to develop easy preparation methods, like ones in which you could just dip or paint the material."
The second part of the device is composed of a dye and titanium dioxide -- the basic ingredients of a dye-sensitized solar cell. This second layer lets the electrons transferred by the iron oxide gain enough energy to extract hydrogen from water.
An outstanding potential -- up to 16%
The results presented in the Nature Photonics paper represent a breakthrough in performance that has been enabled by recent advances in the study of both the iron oxide and dye-sensitized titanium dioxide, and both of these technologies are rapidly advancing. Sivula predicts that the tandem cell technology will eventually be able to attain an efficiency of 16% with iron oxide, while still remaining low cost, which is, after all, the attractiveness of the approach. By making it possible to store solar energy inexpensively, the system developed at EPFL could considerably increase the potential of solar energy to serve as a viable renewable energy source for the future.

Friday, 16 November 2012

Robot Pill


The team, from Imperial College London, are creating a robotic pill that if swallowed by a patient, has the potential to deliver drugs to the small intestine. This is an area of the body that is currently difficult for doctors to get at and treat.
The robotic pill is fitted with a camera, remote controlled “anchor” and miniature repositionable syringe. It is designed to improve the way that intestinal cancers are treated by enabling localised drug delivery. The team say their on-board syringe could enable chemotherapy medicine to be targeted more precisely. This could potentially reduce the number of invasive procedures needed to remove tumours in patients.
The pill could also be used by doctors to inject adrenaline locally to help treat ulcers in the small intestine to reduce inflammation and pain.
Dr Tim Constandinou, from the Winston Wong Centre for Bio-Inspired Technology and the Department of Electrical & Electronic Engineering at Imperial, says:
“The small intestine is a really difficult place for doctors to access using conventional surgical methods, which are often invasive and impact on patient recovery times. We are developing a robotic pill that has the potential to deliver treatments directly to tumours or ulcers in the small intestine. We are still a long way off from delivering this technology to the hospital bedside, but we hope it could one day improve outcomes for patients undergoing treatments.”
Currently, hospitals across the UK use robotic pill technology as a diagnostic tool. The team say their pill is an improvement because it can also deliver treatments as well as being a diagnostic tool.
The robotic pill will consist of a miniature video camera, positioned at the tip, which will relay in real-time video images. It will travel through the body via the contraction and relaxation of muscles in the intestine - a process called peristalsis.
The pill can be stopped remotely when it reaches a tumour or ulcer by lowering a miniature “anchor”, which is deployed from its casing. A tiny needle can then be positioned and injected near the tumour or ulcer to deliver drugs, which is stored inside the casing.
The team, which also includes PhD student Stephen Woods, predicts that they will have a working prototype ready within six months. It will then be tested over a 2-year period in animal models to gauge its effectiveness, which could lead to clinical trials.


Wednesday, 26 September 2012

Have smartphones killed boredom??

Take a look around today at people in line at Starbucks, on the train platform or waiting for their bags at the airport.
Odds are, a huge chunk of them are staring down into a glowing mobile device -- passing time by checking on friends, catching up on texts or e-mail or playing a video game that would have required a PC or home console just a few years ago.
"That's me," said Jeromie Williams, a 36-year-old social media manager and blogger from Montreal. "If I'm on the bus. If I'm waiting in line somewhere ... .
"The other day I was at a restaurant with a friend. He got up two times -- once to smoke a cigarette and once to go to the bathroom. As soon as his ass was off the seat, 'Boom!' iPhone in hand."
Thanks to technology, there's been a recent sea change in how people today kill time. Those dog-eared magazines in your doctor's office are going unread. Your fellow customers in line at the deli counter are being ignored. And simply gazing around at one's surroundings? Forget about it.
Between smartphones, tablets and e-readers, we're becoming a society that's ready to kill even a few seconds of boredom with a tap on a touchscreen.
Smartphone ownership in the United States, and elsewhere, hit a tipping point in 2012. More people now own a smartphone in the United States -- 45% of adults -- than own a traditional cellphone, according to a survey from the Pew Internet & American Life project.
And 42% of all mobile phone users say they expressly use their phone for entertainment when they're bored. (Presumably, non-entertainment uses like texting and e-mail would jack that number up even higher).
"I do everything with my phone," said Alexandra Reed, 39, a self-employed single mom from Charlotte, North Carolina.
"I have five e-mail accounts for different things. I have two phones, one for business and one personal. I use apps -- Mapquest, Google, Twitter, Facebook, Instagram, Pinterest, LinkedIn, Google Plus, CNN, ESPN ... ."
Is it a boredom killer? Absolutely, she said.
"Even when I'm driving, I might have Facebook open," she said. "At a red light the first thing I (do is) just look at my phone. I get a little anxious if I see a notification and don't read it."
Researchers say this all makes sense. Fiddling with our phones, they say, addresses a basic human need to cure boredom by any means necessary.
Christopher Lynn, an anthropology professor at the University of Alabama, compares tapping at smartphones to smoking a cigarette. Both can be "pivots," he says -- things that quickly transfer us from the monotony of everyday life into a world of "unscheduled play."
"Smartphones are like cigarettes are like junk food are like chewing your nails or doodling ...," Lynn wrote in a May essay for the Evolutionary Studies Consortium. "Does the naked space of your own mind and the world around you send you screaming into oblivion when you walk across campus, across a street even? Pull out your smartphone and check your email again -- that car will swerve around you."
With their games, music, videos, social media and texting, smartphones "superstimulate" a desire humans have to play when things get dull, Lynn told CNN in an interview. And he believes that modern society may be making that desire even stronger.
"When you're habituated to constant stimulation, when you lack it, you sort of don't know what to do with yourself ...," he said. "When we aren't used to having down time, it results in anxiety. 'Oh my god, I should be doing something.' And we reach for the smartphone. It's our omnipresent relief from that."
So, our phones are brutally efficient at addressing an ancient desire. But is that always a good thing?
At Oxford, England's Social Issues Research Centre, researchers fear it is not. In their view, by filling almost every second of down time by peering at our phones we are missing out on the creative and potentially rewarding ways we've dealt with boredom in days past.
"Informational overload from all quarters means that there can often be very little time for personal thought, reflection, or even just 'zoning out,' " researchers there wrote. "With a mobile (phone) that is constantly switched on and a plethora of entertainments available to distract the naked eye, it is understandable that some people find it difficult to actually get bored in that particular fidgety, introspective kind of way."
Williams, the Montreal blogger, admits as much.
"One thing that unfortunately I do miss out on is that sort of quiet time where I can think about something I want to write ... where, if I'm bored, I'm flipping open Word and punching something out," he said. "Instead, out comes 'Infinity Blade II' and I'm killing titans.
"Before smartphones came out, you had that down time where you sit on the bus and your mind just kind of wanders and you think of these amazing things. You get out that old thing called pen and paper and you jot it down."
But Joel Marx, a 25-year-old research assistant in Baltimore, Maryland, disagrees. Marx juggles two jobs and sees his phone as a way to be productive, and keep up with the news, during gaps in his hectic workdays. He relies on it for fun, but also for research and scheduling.
"I feel like it gives me a break from what's at hand," he said. "I even find it helps to keep me going through the day as I can get in touch with things in the outside world. Most of the time, I would have done nothing during those times anyhow."
Reed, the Charlotte mom, admits her phone use sometimes distracts her from work or even watching a movie. But compared to other time-killers, she thinks the phone is a good option.
"I actually feel more productive reading things online and on social media like Twitter and Facebook than if I was just sitting and watching a TV show," she said. "I follow people who are mostly sports and news anchors, people like that -- interesting people I know I can learn something from."
Source: Doug Gross, CNN

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