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	<title>Barney Pell&#039;s Weblog &#187; Science</title>
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	<link>http://www.barneypell.com</link>
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		<title>Wolfram Alpha: A New Kind of Question-Answering System</title>
		<link>http://www.barneypell.com/2009/03/wolfram-alpha-a-new-kind-of-question-answering-system/</link>
		<comments>http://www.barneypell.com/2009/03/wolfram-alpha-a-new-kind-of-question-answering-system/#comments</comments>
		<pubDate>Mon, 23 Mar 2009 22:03:15 +0000</pubDate>
		<dc:creator>Barney</dc:creator>
				<category><![CDATA[Collective Intelligence]]></category>
		<category><![CDATA[Human Language Technology]]></category>
		<category><![CDATA[Information retrieval]]></category>
		<category><![CDATA[Powerset]]></category>
		<category><![CDATA[Science]]></category>
		<category><![CDATA[Search]]></category>
		<category><![CDATA[Software]]></category>
		<category><![CDATA[Web/Tech]]></category>

		<guid isPermaLink="false">http://174.120.172.92/~barneype/?p=124</guid>
		<description><![CDATA[There has been much excitement recently over the upcoming launch of Wolfram Alpha. This is a new question-answering system developed by Stephen Wolfram, inventor of Mathematica, and it is scheduled for a beta launch in May. Wolfram has been providing demos to industry insiders. I haven’t had a demo yet, but I have learned what [...]]]></description>
			<content:encoded><![CDATA[<p>There has been much excitement recently over the upcoming launch of Wolfram Alpha. This is a new question-answering system developed by Stephen Wolfram, inventor of Mathematica, and it is scheduled for a beta launch in May. Wolfram has been providing demos to industry insiders. I haven’t had a demo yet, but I have learned what I could from reading articles by Nova Spivak (“<a href="http://www.techcrunch.com/2009/03/08/wolfram-alpha-computes-answers-to-factual-questions-this-is-going-to-be-big/">Wolfram Alpha computes answers to factual questions. This is going to be big”</a>) and Doug Lenat (<a href="http://www.semanticuniverse.com/blogs-i-was-positively-impressed-wolfram-alpha.html">“I was positively impressed with Wolfram Alpha”</a>). And this weekend I spoke with William Tunstall-Pedoe, CEO of <a href="http://www.trueknowledge.com/">True Knowledge</a>, who also got a demo.  Many of my examples and conclusions come from conversation with William (thanks!).  Since life is short and so is the attention of web readers, I&#8217;ll give the rest of my thoughts in bullet form.</p>
<p><strong>What it is: A new kind of question-answering system. </strong></p>
<p><strong>Examples</strong></p>
<ul>
<li> Math: &#8220;2+2&#8243; and then a few simple math questions: &#8220;integrate xsin^4xdx&#8221;, &#8220;what is the square root of 18&#8243; etc.</li>
<li> Business: “gdp france” showed amount and graph of how it changed over time. “gdp france/germany” showed graph with both amounts and the ratio</li>
<li> “internet users in Europe”: Showed total, and a chart of usage by country in Europe, at the current time, specifically highlighting the biggest and smallest</li>
<li> “ISS”: generates a graphic rendition of the international space station orbiting earth and updating in real-time</li>
<li> “tides in san Francisco”: showed a graph of tides over time, where the times were listed in the local time regime current in the late 19th century for those data points. “tide NYC 11/12/1922” gave a single answer.</li>
<li> “weather”: showed graph of average temperature in Cambridge, MA (where Stephen was when doing the demo). Based on reverse IP lookup.</li>
<li> Computational fluid dynamics: typing in the name of a specific aerofoil produced a picture of that aerofoil along with its differential equations.</li>
<li> stock prices:  “MSFT CSCO” showed comparison chart</li>
<li> chemicals: Substances at temperature or pressure, got physical properties calculated. “H2SO4” showed a diagram and chemical properties. &#8220;5 molar h2s04&#8243; did something cool, I don’t know what.</li>
<li> genome sequences: “AGTAG” shows sequences from the human genome that match that pattern</li>
<li> data about people: “How old is Barack Obama” gives his age now. “When was Alan Turing born” gives the answer. “How old is Alan Turing” (a trick question) gives an error message with no human-readable explanation (True Knowledge, by contrast, tells you exactly why this is a trick question).</li>
</ul>
<p><strong>Coverage of data: It answers questions over the following types of structured data:</strong></p>
<ul>
<li> static tables and databases (e.g. a database of internet usage by country by year)</li>
<li> dynamic data feeds (e.g. historical stock market data, position of space shuttle, weather)</li>
<li> numerical inference (e.g. math questions)</li>
<li> numerical computations and simulations (e.g. tides, astronomy, chemistry)</li>
</ul>
<p><span id="more-124"></span></p>
<div id="a000132more">
<div id="more">
<p><strong> Form of queries</strong></p>
<li> The queries are expressed in template-based natural language or corresponding abbreviated forms</li>
<li> NL syntax: “what is the gdp of france”</li>
<li> Template compressed: {attribute} of {object} {time}  (“gdp france 2008”)</li>
<li> Mathematical expressions, or NL versions of these (as one might do in an entry-level LISP class)</li>
<li> I can imagine the query language supports (or could support) restrictions on presentation (plot, chart) and other constraints one might express in SQL (order by, etc), though I haven’t seen any examples showing this exists at present.<strong> Presentation and Answers</strong>
<ul>
<li> Answers can be a single fact, a table, or a graphical display of a live simulation.  Usually it’s a combination of these.</li>
<li> For ambiguous queries, it always picks one interpretation. And you can switch to something else if that’s wrong. (A drop-down menu of other alternatives).</li>
</ul>
<p><strong> Domains and Generality</strong></li>
<li> Wolfram Alpha is described as an open domain question answering system on structured data. But how exactly is this open domain? I distinguish three levels of domain generality:
<ul>
<li> Closed domain: A specified domain</li>
<li> Multi domain: Multiple domains are covered, we try to add more domains, but still treats each one a closed. Note: this can be accomplished through a unified or disjoint treatment.</li>
<li> Open domain: Any domain is within scope</li>
</ul>
</li>
<li>For Wolfram Alpha they have taken a domain-by-domain approach. For each domain, they determined what type of questions to support, and which data, feeds, or simulations to incorporate, and did hand curation to enable these.</li>
<li> The domains are typically fact and data oriented, especially where simulations are available<strong> Architecture</strong></li>
<li> The system is coded in Mathematica, about 4.5M lines of code, developed by a large team (100 people at present).</li>
<li> From this <a href="http://www.wolfram.com/products/mathematica/quickoverview/">presentation on Mathematica </a>it is quite easy to extrapolate what Wolfram Alpha is like &#8211; essentially Mathematica + a vast library of mathematical models and data attached + some error-tolerant processing of the user&#8217;s input (thanks Peter Clark for pointing this out).</li>
<li> Piecing together the Mathematica approach and generalizing from the examples and my own knowledge, I believe they have a basic level of representational tools that gets shared for multiple domains. Here&#8217;s how I would think about this:
<ul>
<li> Define the objects in the domain</li>
<li> Make a table of function names and attributes in the domain, and for each function or attribute list the restrictions on the type of objects that this can apply to.</li>
<li> Standardize representations of time and place and charting elements associated with these.</li>
<li> Import and normalize data</li>
<li> Associate data fields to objects and attributes in the domain</li>
</ul>
<p><strong> Infrastructure</strong></li>
<li> The system runs on thousands of expensive servers (running mathematica in real-time).</li>
<li> Apparently 10 machines per query give 1 queries per second (qps), so they can do 100 qps on 1,000 machines.<strong> What is innovative about this</strong></li>
<li> Rich mathematical computational infrastructure (Mathematica) to support mathematical aspects of natural language queries</li>
<li> Integration of mathematical inference and simulations along with structured data in a single question-answering system</li>
<li> Unprecedented level of structured data aggregation and curation</li>
<li> Rich presentation including static and dynamic elements and multiple modalities</li>
<li> (Potentially) Deployment of NL-to-SQL query translation in a multi-domain system. The technology has existed to do this for several years But I don’t know if anyone has deployed it yet. I’m not sure if Wolfram has deployed this and haven’t seen enough examples to indicate if they have.<strong> What it doesn’t do</strong></li>
<li> Queries or presentation against unstructured data (neither keyword nor NL queries against unstructured data, which is a strength of <a href="http://www.powerset.com/">Powerset</a>)</li>
<li> Queries requiring ontological or commonsense inference (whether structured or unstructured, which is a strength of True Knowledge and <a href="http://www.cyc.com/">Cyc</a>)</li>
<li> Answers in support of transactions (e.g. price feeds from many merchants or airlines), which is shown in various stages in many major search engines</li>
<li> Cross-domain multiple domains (e.g. “what was the weather in San Francisco when Yahoo was founded”, which is a strength of True Knowledge)<strong> Implications for the field</strong>
<ul>
<li> Question answering has been an important part of search results the whole time, but it has often been a second class citizen and hardly promoted</li>
<li> By increasing the level of comprehensiveness of structured questions (in terms of data and domains), this can increase awareness and usage of question answering systems</li>
<li> This should move question answering to be more of a competitive feature across search engines</li>
<li> Users will want to ask questions for structured and unstructured queries, not just structured queries, which will increase perceived differentiation for technology like Powerset</li>
<li> If the use of structured data and simulations prove valuable to large number of users and search engines, then this will increase the need to transform and route queries to vertical experts, potentially developed by ecosystem partners</li>
<li> This will increase the need and value for ecosystem players to add semantic markup to their structured data and simulations, hence making it easier to offer more semantic question answering and integration with other services, and expanding the value of the services by search engines in a virtuous cycle</li>
</ul>
<p><strong>Conclusion</strong></p>
<p>In conclusion, Wolfram Alpha is not going to be a new search engine or a universal answer engine. It is not going to put the existing major players or semantic search startups out of business. But there appears to be real innovation here, leading to at least a <span style="text-decoration: underline;">new kind of system</span> that we have not seen before.  I am eagerly looking forward to my turn to try it out.</li>
</div>
</div>
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		<title>Neurophysiology of Romantic Love</title>
		<link>http://www.barneypell.com/2005/05/neurophysiology-of-romantic-love/</link>
		<comments>http://www.barneypell.com/2005/05/neurophysiology-of-romantic-love/#comments</comments>
		<pubDate>Tue, 31 May 2005 10:25:00 +0000</pubDate>
		<dc:creator>Barney</dc:creator>
				<category><![CDATA[Science]]></category>

		<guid isPermaLink="false">http://174.120.172.92/~barneype/?p=27</guid>
		<description><![CDATA[The New York Times featured an article today entitled Watching New Love as It Sears the Brain. Excerpts from the NYT article are below. In an analysis of the images appearing today in The Journal of Neurophysiology, researchers in New York and New Jersey argue that romantic love is a biological urge distinct from sexual [...]]]></description>
			<content:encoded><![CDATA[<p>The New York Times featured an article today entitled <a href="http://www.nytimes.com/2005/05/31/health/psychology/31love.html">Watching New Love as It Sears the Brain</a>.<br />
Excerpts from the NYT article are below.</p>
<blockquote><p>In an analysis of the images appearing today in The Journal of Neurophysiology, researchers in New York and New Jersey argue that romantic love is a biological urge distinct from sexual arousal.<br />
It is closer in its neural profile to drives like hunger, thirst or drug craving, the researchers assert, than to emotional states like excitement or affection. As a relationship deepens, the brain scans suggest, the neural activity associated with romantic love alters slightly, and in some cases primes areas deep in the primitive brain that are involved in long-term attachment.<br />
In a series of studies, researchers have found that, among other processes, new love involves psychologically internalizing a lover, absorbing elements of the other person&#8217;s opinions, hobbies, expressions, character, as well as sharing one&#8217;s own. &#8220;The expansion of the self happens very rapidly, it&#8217;s one of the most exhilarating experiences there is, and short of threatening our survival it is one thing that most motivates us,&#8221; said Dr. Aron, of SUNY, a co-author of the study. </p></blockquote>
<p>For a fascinating related book on the subject of neuroscience and romantic love, I recommend <a href="http://www.amazon.com/exec/obidos/tg/detail/-/0375709223/103-6399356-6834223?v=glance">A General Theory of Love </a>, by Thomas Lewis, Fari Amini, and Richard Lannon.</p>
]]></content:encoded>
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		<title>Present Life of Mars, but will NASA keep the lights on?</title>
		<link>http://www.barneypell.com/2005/02/present-life-of-mars-but-will-nasa-keep-the-lights-on/</link>
		<comments>http://www.barneypell.com/2005/02/present-life-of-mars-but-will-nasa-keep-the-lights-on/#comments</comments>
		<pubDate>Thu, 17 Feb 2005 22:39:29 +0000</pubDate>
		<dc:creator>Barney</dc:creator>
				<category><![CDATA[NASA]]></category>
		<category><![CDATA[Science]]></category>

		<guid isPermaLink="false">http://174.120.172.92/~barneype/?p=9</guid>
		<description><![CDATA[Exclusive: NASA Researchers Claim Evidence of Present Life on Mars.
Whether or not they have really found evidence of life on mars, the article underscores a bitter irony facing NASA today. The same scientists and technologists who have dedicated decades to support understanding and exploration (NASA Ames has been the center of excellence for Astrobiology and Intelligent Systems, among other things) are now faced with deep cuts to their research programs and the possiblity that the entire center will be closed.
]]></description>
			<content:encoded><![CDATA[<p><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Space.com jumped the gun with an <a href="http://www.space.com/scienceastronomy/mars_life_050216.html">article </a>with the headline: NASA researchers claim evidence of present life on Mars. </span><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> The intro is below:&nbsp; </span></p>
<blockquote dir="ltr" style="MARGIN-RIGHT: 0px"><p><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><span face="Arial"><span style="FONT-FAMILY: Arial">A pair of NASA scientists told a group of space officials at a private meeting here Sunday that they have found strong evidence that life may exist today on Mars, hidden away in caves and sustained by pockets of water.</span></span></span></p>
</p>
<p><span face="Arial"><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">The scientists, Carol Stoker and Larry Lemke of NASAâ€™s </span></span><span face="Arial"><span style="FONT-FAMILY: Arial">Ames</span></span><span face="Arial"><span style="FONT-FAMILY: Arial">&nbsp;</span></span><span face="Arial"><span style="FONT-FAMILY: Arial">Research</span></span><span face="Arial"><span style="FONT-FAMILY: Arial">&nbsp;</span></span><span face="Arial"><span style="FONT-FAMILY: Arial">Center</span></span><span face="Arial"><span style="FONT-FAMILY: Arial"> in </span></span><span face="Arial"><span style="FONT-FAMILY: Arial">Silicon Valley</span></span><span face="Arial"><span style="FONT-FAMILY: Arial">, told the group that they have submitted their findings to the journal Nature for publication in May, and their paper currently is being peer reviewed.</span></span></p>
</blockquote>
<blockquote dir="ltr" style="MARGIN-RIGHT: 0px"><p class="MsoNormal"><span face="Arial"><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">What Stoker and Lemke have found, according to several attendees of the private meeting, is not direct proof of life on Mars, but methane signatures and other signs of possible biological activity remarkably similar to those recently discovered in caves here on Earth.</span></span></p>
</blockquote>
<p><span id="more-9"></span></p>
<p><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">These two scientists are colleagues of mine at NASA Ames. I am sure they are not happy to have this information leaked out of context of their journal article.&nbsp; And in fact, NASA has issued a correction stating that while their research suggests where to look for life on Mars, there is no data from Mars as yet to support any conclusions.&nbsp; </span></p>
<p><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Whether or not they have really found evidence of life on mars, the article underscores a bitter irony facing NASA today. In order to support the new Exploration initiative (sending humans to the moon, and eventually to Mars), NASA is redirecting large portions of its funding away from science to pay for the construction of a new Crew Exploration Vehicle.&nbsp; The NASA research centers (including Ames, where I work) are being hit hardest by these cuts. The same scientists and technologists who have dedicated decades to support understanding and exploration (NASA Ames has been the center of excellence for Astrobiology and Intelligent Systems, among other things) are now faced with deep cuts to their research programs and the possiblity that the entire center will be closed.&nbsp; When I spoke with one researcher today, he said: &#8220;This is what I love, and what I want to do with my life.&#8221;&nbsp; But given the dissolution of his world-class research group, he might just have to go work at google instead (joining several other NASA Ames alumni).</span></p>
<p><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Wouldn&#8217;t it be ironic if NASA finally sends humans to Mars, only to find that the experts to tell them where to look for life have all moved on to new jobs?&nbsp; Maybe this headline will be an alarm call to the new NASA Administrator to save the world-class institution before it is too late. </span></p>
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