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Test Flight of the World’s Smallest Helicopter July 23, 2008

Posted by Dmitri in Future, nanotechnology, technology.
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A major milestone towards making the smallest helicopter in the world was recently reached by a Norwegian company Prox Dynamics. A prototype was able to demonstrate take off, forward and turning flight, and landings during a successful test flight. The Hornet-1 prototype, weighing less than 15 grams with a rotor diameter of 100 mm, has the same dimensions and weight as the production version, but with a much simpler avionics package. A two-bladed single rotor provides some inherent stability and is controlled by the smallest and lightest in the world servos that weigh less than 0.5 grams.

Science In Islamic Countries October 1, 2007

Posted by Dmitri in Science, Slashdot.
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Physics Today published a thought-provoking article on the status of and prospects for science in Islamic countries. The author, a Pakistani physicist, posits that ‘Internal causes led to the decline of Islam’s scientific greatness long before the era of mercantile imperialism. To contribute once again, Muslims must be introspective and ask what went wrong.’ The author makes a few strong conclusions, many of which are relevant to the general debate between science and religion.

Scientific progress constantly demands that facts and hypotheses be checked and rechecked, and is unmindful of authority. But there lies the problem: The scientific method is alien to traditional, unreformed religious thought. Only the exceptional individual is able to exercise such a mindset in a society in which absolute authority comes from above, questions are asked only with difficulty, the penalties for disbelief are severe, the intellect is denigrated, and a certainty exists that all answers are already known and must only be discovered.

Science finds every soil barren in which miracles are taken literally and seriously and revelation is considered to provide authentic knowledge of the physical world. If the scientific method is trashed, no amount of resources or loud declarations of intent to develop science can compensate. In those circumstances, scientific research becomes, at best, a kind of cataloging or ‘butterfly-collecting’ activity. It cannot be a creative process of genuine inquiry in which bold hypotheses are made and checked.

Update: over a 1000 comments in Slashdot discussion of this article.

Future Technologies October 2, 2006

Posted by Dmitri in Future, Web 2.0, nanotechnology, technology.
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PC World looks into The Future of Technology and offers 100 Fearless Forecasts. Although better user interfaces are one of the future predictions, for now using the ‘print view’ is the most convenient way to read individual sections of the sprawling article. A persevering reader will find, however, an interesting overview of various emerging technologies including information about existing examples and prototypes. Briefly: Web will be fast, seamless, and targeted, OS won’t matter, PCs will be modular and specialized, every appliance will be smart, and privacy will become non-existent (according to a privacy expert from UC-Berkeley ‘If you simply drive your car into the parking lot of Sports Authority, the company might argue that you have a business relationship’).

JavaScript on GooglePages July 15, 2006

Posted by Dmitri in Google, GooglePages, Web 2.0, Websites.
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Google Page Creator no longer removes JavaScript from GooglePages. Useful tools and active content, such as, Google Analytics, StatCounter, AdSense, Flash animation, and various JS widgets can now be added to any GooglePage (including the default home page) without resorting to hacks or manually uploaded HTML.

GPX-Files Homepage Screenshot

The detailed description of this new feature is too long to be posted here, so it is presented on GooglePage eXplorer website, including tutorials with specific instructions for adding JavaScript code for:

As creating GooglePages technically has little to do with biohacking, a brief how-to and all the follow-up information will be POSTED elsewhere.

Creating a GooglePage July 4, 2006

Posted by Dmitri in Google, GooglePages, Web 2.0, Websites, biohacker.
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Google Page Creator Screenshot

Update (July 4, 2006): My GooglePage tutorials are now moving to the new GooglePage eXplorer (GPX-Files) site. Apologies for any inconvenience for the next few days, as the basic GooglePages and Google Page Creator tutorials are updated. For the last couple of weeks, I have also enjoyed the “hacker” aspect of being a biohacker and have been experimenting with the new GPC feature of allowing some JavaScript code to be added to a GooglePage. The results are described in the GPX-Files advanced tutorials, all of which should be up in a few days.

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US Census Records Online June 23, 2006

Posted by Dmitri in Websites.
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Researching one's own (or anyone else's) family history has just gotten easier.

Ancestry.com has built a database of "every name in every publicly available [US] federal census taken from 1790 to 1930" (the cutoff date is due to a 72 year delay before the US government releases original census documents). According to an AP story, the database contains 5 billion searchable names linked to 13 million images of original census pages. The searches can reveal such odd bits of historical trivia as Mary Lincoln aging only 7 years between the 1850 and the 1860 census. The site also includes Flash-animated tools to look at historical snapshots of the US every decade from 1790 to 1930.

For those not serious enough about researching their ancestry to shell out a yearly or a monthly fee, there is even a convenient 14-day free trial.

Indexing the Hottest Topics in Physics May 7, 2006

Posted by Dmitri in Citation Impact, Citation Search, Physics.
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There is finally a scientific way to determine the hottest scientific topics. Michael Banks, a PhD student at the MPI-Stuttgart, in a recent paper extended the Hirsch Index for ranking research topics in Physics. The h-b index is based on the number of published papers and citations for a given topic. The second metric, m, normalizes the h-b by the the number of years that papers on the topic have been published. An m>3 means that a topic is hot. Moreover, a large m number combined with an h-b>100 represents a topic that was popular in the past and still is today. Finally, a small m but large h-b reflects an older topic that was popular for many years but is now less so. The following is a list of the 10 hottest topics in Physics, based on a larger dataset from the original paper.

Topic h-b m
carbon nanotubes 167 12.85
nanowires 105 8.75
quantum dots 149 7.84
fullerenes 140 7.78
giant magnetoresistance 116 6.82
M-theory 79 6.58
quantum computation 73 5.21
teleportation 61 5.08
superstrings 99 3.96
heavy fermion 97 3.73

The original Hirsch's h-index is based on the number of times that papers by a particular scientist are cited. A scientist with a h-index of 10, will have published at least 10 papers that have received at least 10 citations each. Similarly, a topic with an h-b index of 10 means that there are at least 10 papers on that topic, each of which has been cited at least 10 times. Some topics have been around longer than others, so the second metric, m, normalizes the h-b by the the number of years that papers on the topic have been published. The resulting m number indicates how important a particular topic is today. Like the original h-index, the h-b index is calculated by searching the ISI Web of Science database for the topic and then sorting the results by the number of citations.

Search Options for Research Papers April 27, 2006

Posted by Dmitri in Chemistry, Citation Search, Google, Physics, Web 2.0, Websites.
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A few personal favorites from the list of alternatives to the popular Web of Science (WoS) index reviewed by Dana L. Roth (for details, see the RMIMR post or the full PDF file). In accordance with my personal research interests, these are the tools useful for literature and citation searches in Physics and Chemistry.

Web of Science
WoS and other databases from Thomson Scientific like ISI Web of Knowledge and the ISI journal impact factor are the tools that I personally use the most. One feature in WoS that I find increasingly useful is the system of citation alerts, whereby I am notified (by e-mail) every time a particular paper has been cited. By selectively “tagging” in this manner several important and specialized papers in a given field (e.g., immobilization of DNA on surfaces), the resulting alerts effectively notify me about most of the new papers on the subject. WoS also happens to provide the easiest way I know to check somebody’s Hirsch index.

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Google Ranking for Scientific Papers April 25, 2006

Posted by Dmitri in Citation Impact, Citation Search, Google, Physics, Websites.
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A recent paper on “Finding Scientific Gems with Google” tested the application of “the Google PageRank algorithm to assess the relative importance of all publications in the Physical Review family of journals from 1893–2003″. The results, highlighted on IoP’s physicsweb, indicate that in general highly cited papers also have high Google rank numbers, but the algorithm also found a few exceptional papers that have anomalously high Google rank numbers compared with their citation rank. Such anomalies can occur when several derivative follow-up papers, written at a more accessible level, capture most of the subsequent citations. Google Scholar is implementing similar ranking ideas via the new ‘recent articles’ option, which promises to rank papers based on factors like the number of citations and “the prominence of the author’s and journal’s previous papers”.

The updated Google Scholar conveniently includes links to PDF versions of papers from the authors’ websites (when available), which can be a much faster download option than browsing through the subscription-based publishers’ sites. By contrast, Academic search on Windows Live only links to published or arXiv versions of the papers. Both services, however, are not yet as complete as the traditional citation search databases and, in some cases, have trouble identifying multiple links to the same paper, when respective sources contain typos or use different formats for citations.

Neutrino Mass on Slashdot April 2, 2006

Posted by Dmitri in Physics, Slashdot.
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Follow-up links on neutrino mass story that I submitted to Slashdot, courtesy of the Slashdot discussion thereof.

MINOS experiment homepage

Richard Feynman lectures on particle physics (math-lite version)

UCI page with a short explanation of neutrino oscillations

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