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Acupuncture quackademic medicine infiltrates PLoS ONE [Respectful Insolence] PDF Print E-mail

Nearly a month ago, I expressed my dismay and displeasure at the infiltration fo quackademic medicine into what is arguably the premier medical journal in the world, The New England Journal of Medicine (NEJM) in the form of a highly credulous review on the use of acupuncture for low back pain that brought eternal shame on the hallowed pages of a once-great journal. As Mark Crislip put it, trust, once damaged or lost, is very hard to restore, and I definitely lost a lot of trust for the NEJM compared to what I had for it a month ago. Since then, I've been keeping my eyes out for other examples of quackademic medicine infiltrating various peer-reviewed journals. Unfortunately, I have not lacked for examples.

Fresh in my memory, though, remains the stench of seeing quackademic medicine in the NEJM. Unfortunately, that stench was resurrected, as the faint odor of urine can be revived by the application of hot and humid weather, the memory of the stench of quackademic medicine at the NEJM was revived by an article that a reader sent to me. Apparently someone was interested in just who some of the writers of the NEJM article were. At the time, when I wrote about the article, I didn't really care too much about any of the authros other than the lead author, Dr. Brian Berman. Apparently this reader thought I should check out at least one of the other authors, which I proceeded to do. I happened to pick Dr. Helene M. Langevin of the University of Vermont. (Who knew Vermont had quackademic medicine?) One thing led to another (PubMed, specifically), and suddenly I found this gem of a quackademic medicine article by Dr. Langevin in, of all places PLoS ONE, entitled Electrical Impedance of Acupuncture Meridians: The Relevance of Subcutaneous Collagenous Bands.

Senior author? Dr. Langevin.

Funding source? What do you think? The National Center for Complementary and Alternative Medicine (NCCAM), of course!

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Archaeology 101: Chronology, or, How Can I Get A Date? [Aardvarchaeology] PDF Print E-mail

Archaeological chronology aims to answer the question "When did this or that event happen?". This question can usually be re-phrased as "When was this or that thing made?", where the thing under study may be anything from a bead up to the Great Wall of China.

Most dating evidence is based upon similarity: people are almost incapable of doing anything in exactly the same way for any long stretch of time, and when they try to return to an old way of doing something, they never get all the details right. Such similarities (again on all scales of evidence) are dealt with in a more or less formalised way by means of a tool kit called typology. Collect a group of similar pots / house foundations / Great Walls, note explicitly the details that unite them and separate them from their peers, and you have a type definition. Thus defined, all types have a chronological delimitation, though many may be too long-lived to be very useful, and the presence of one type of pot doesn't rule out the parallel existence of several other types.

The very birth of archaeology as a scientific discipline is reckoned from the first chronological and typological breakthrough: C.J. Thomsen's 1821 division of Scandinavian Prehistory into three Ages where cutting tools were made of different materials. First stone, then bronze, and then iron. Chronological research is still working to sub-divide the three Ages into ever finer well-defined slices.

The definition of an archaeological period takes the form of a list of types found associated with each other: pots, houses etc. How can we know in what order these periods occurred? We still largely do this by typological seriation and stratigraphy.

Seriation is a more or less formalised process where you order a collection of pots / houses / Great Walls according to similarity. You put two pots on a table, grab a third pot and decide if it should go between the two or over to either side. This is formalised as pot 1 having traits ABC, pot 2 BCD and pot 3 CDE. Then test if the series you've established is chronological, firstly by seriation of closed find associations (graves, hoards) by the same means, then by stratigraphy. Are ABC pot sherds usually in layers located on top of separate layers with CDE pot sherds? Or the other way around? Or are they usually mixed up?

So far I've spoken only about relative chronology, where we can say with confidence that the types listed for period B fill the interval between periods A and C. What about absolute chronology, that allows us to say that the period B types appeared in the AD 10s and were replaced by period C types in the AD 150s? There are many methods, most importantly radiocarbon.

Radiocarbon dating is a complicated field of research that moves forward rapidly. Briefly put it will tell you when a certain living thing died. With current technology, the accuracy is usually counted in decades. Much of the intricacies with radiocarbon have to do with the relationship between the death of that living thing and the event an archaeologist wants to date. If you find a piece of charcoal on a settlement site, you first need to think about how it ended up there. Stratigraphy is paramount: is it under a stone foundation? Or is it in a ditch that cuts across a house foundation? If you can't answer such questions, don't even submit the sample. And you need to think of intrinsic age: the heartwood of an old oak died centuries before someone cut the tree down. A wood anatomist can judge this for you. Bones have no intrinsic age, but their apparent age is skewed by the amount of seafood the creature ate in life.

Other important absolute dating techniques are historical dating (e.g. coins with dates on them or the names of rulers whose regnal dates are known), dendrochronology (the width of tree rings varies with the weather, forming a chronological bar code) and thermoluminiscence (quartz in a brick or potsherd or hearth stone accumulates radiation energy after being set to zero by strong heat).

Techniques like radiocarbon have not made typology or stratigraphy obsolete. For one thing, you need robust typological definitions to be able to generalise the radiocarbon date of a single object to an entire group of similar ones. Furthermore, fashion changes at shorter intervals than the current accuracy of a radiocarbon date. This means that you can often get a tighter date from typology than from radiocarbon. Southern Scandinavia's Migration Period lasted about 170 years and is thus about three radiocarbon dates long. But seriating a sample of female graves from Gotland, I managed to define four successive fashion phases for the same interval.

For a more thorough treatment of the subject, see Kris's long post over at About.com.

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What would scholarly communications look like if we invented it today? PDF Print E-mail
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Image by cameronneylon via Flickr

I’ve largely stolen the title of this post from Daniel Mietchen because I it helped me to frame the issues. I’m giving an informal talk this afternoon and will, as I frequently do, use this to think through what I want to say. Needless to say this whole post is built to a very large extent on the contributions and ideas of others that are not adequately credited in the text here.

If we imagine what the specification for building a scholarly communications system would look like there are some fairly obvious things we would want it to enable. Registration of ideas, data or other outputs for the purpose of assigning credit and priority to the right people is high on everyone’s list. While researchers tend not to think too much about it, those concerned with the long term availability of research outputs would also place archival and safekeeping high on the list as well. I don’t imagine it will come as any surprise that I would rate the ability to re-use, replicate, and re-purpose outputs very highly as well. And, although I won’t cover it in this post, an effective scholarly communications system for the 21st century would need to enable and support public and stakeholder engagement. Finally this specification document would need to emphasise that the system will support discovery and filtering tools so that users can find the content they are looking for in a huge and diverse volume of available material.

So, filtering, archival, re-usability, and registration. Our current communications system, based almost purely on journals with pre-publication peer review doesn’t do too badly at archival although the question of who is actually responsible for actually doing the archival, and hence paying for it doesn’t always seem to have a clear answer. Nonetheless the standards and processes for archiving paper copies are better established, and probably better followed in many cases, than those for digital materials in general, and certainly for material on the open web.

The current system also does reasonably well on registration, providing a firm date of submission, author lists, and increasingly descriptions of the contributions of those authors. Indeed the system defines the registration of contributions for the purpose of professional career advancement and funding decisions within the research community. It is a clear and well understood system with a range of community expectations and standards around it. Of course this is circular as the career progression process feeds the system and the system feeds career progression. It is also to some extent breaking down as wider measures of “impact” become important. However for the moment it is an area where the incumbent has clear advantages over any new system, around which we would need to grow new community standards, expectations, and norms.

It is on re-usability and replication where our current system really falls down. Access and rights are a big issue here, but ones that we are gradually pushing back. The real issues are much more fundamental. It is essentially assumed, in my experience, by most researchers that a paper will not contain sufficient information to replicate an experiment or analysis. Just consider that. Our primary means of communication, in a philosophical system that rests almost entirely on reproducibility, does not enable even simple replication of results. A lot of this is down to the boundaries created by the mindset of a printed multi-page article. Mechanisms to publish methods, detailed laboratory records, or software are limited, often leading to a lack of care in keeping and annotating such records. After all if it isn’t going in the paper why bother looking after it?

A key advantage of the web here is that we can publish a lot more with limited costs and we can publish a much greater diversity of objects. In principle we can solve the “missing information” problem by simply making more of the record available. However those important pieces of information need to be captured in the first place. Because they aren’t currently valued, because they don’t go in the paper, they often aren’t recorded in a systematic way that makes it easy to ultimately publish them. Open Notebook Science, with its focus on just publishing everything immediately, is one approach to solving this problem but it’s not for everyone, and causes its own overhead. The key problem is that recording more, and communicating it effectively requires work over and above what most of us are doing today. That work is not rewarded in the current system. This may change over time, if as I have argued we move to metrics based on re-use, but in the meantime we also need much better, easier, and ideally near-zero burden tools that make it easier to capture all of this information and publish it when we choose, in a useful form.

Of course, even with the perfect tools, if we start to publish a much greater portion of the research record then we will swamp researchers already struggling to keep up. We will need effective ways to filter this material down to reduce the volume we have to deal with. Arguably the current system is an effective filter. It almost certainly reduces the volume and rate at which material is published. Of all the research that is done, some proportion is deemed “publishable” by those who have done it, a small portion of that research is then incorporated into a draft paper and some proportion of those papers are ultimately accepted for publication. Up until 20 years ago where the resource pinch point was the decision of whether or not to publish something this is exactly what you would want. The question of whether it is an effective filter; is it actually filtering the right stuff out, is somewhat more controversial. I would say the evidence for that is weak.

When publication and distribution was the expensive part that was the logical place to make the decision. Now these steps are cheap the expensive part of the process is either peer review, the traditional process of making a decision prior to publication, or conversely, the curation and filtering after publication that is seen more widely on the open web. As I have argued I believe that using the patterns of the web will be ultimately a more effective means of enabling users to discover the right information for their needs. We should publish more; much more and much more diversely but we also need to build effective tools for filtering and discovering the right pieces of information. Clearly this also requires work, perhaps more than we are used to doing.

An imaginary solution

So what might this imaginary system that we would design look like. I’ve written before about both key aspects of this. Firstly I believe we need recording systems that as far as possible record and publish both the creation of objects, be they samples, data, or tools. As far as possible these should make a reliable, time stamped, attributable record of the creation of these objects as a byproduct of what the researcher needs to do anyway. A simple concept for instance is a label printer that, as a byproduct of printing off a label, makes a record of who, what, and when, publishing this simultaneously to a public or private feed.

Publishing rapidly is a good approach, not just for ideological reasons of openness but also some very pragmatic concerns. It is easier to publish at the source than to remember to go back and do it later. Things that aren’t done immediately are almost invariably forgotten or lost. Secondly rapid publication has the potential to both efficiently enable re-use and to prevent scooping risks by providing a time stamped citable record. This of course would require people to cite these and for those citations to be valued as a contribution; requiring a move away from considering the paper as the only form of valid research output (see also Michael Nielsen‘s interview with me).

It isn’t enough though, just to publish the objects themselves. We also need to be able to understand the relationship between them. In a semantic web sense this means creating the links between objects, recording the context in which they were created, what were their inputs and outputs. I have alluded a couple of times in the past to the OREChem Experimental Ontology and I think this is potentially a very powerful way of handling these kind of connections in a general way. In many cases, particularly in computational research, recording workflows or generating batch and log files could serve the same purpose, as long as a general vocabulary could be agreed to make this exchangeable.

As these objects get linked together they will form a network, both within and across projects and research groups, providing the kind of information that makes Google work, a network of citations and links that make it possible to directly measure the impact of a single dataset, idea, piece of software, or experimental method through its influence over other work. This has real potential to help solve both the discovery problem and the filtering problem. Bottom line, Google is pretty good at finding relevant text and they’re working hard on other forms of media. Research will have some special edges but can be expected in many ways to fit patterns that mean tools for the consumer web will work, particularly as more social components get pulled into the mix.

On the rare occasions when it is worth pulling together a whole story, for a thesis, or a paper, authors would then aggregate objects together, along with text and good visuals to present the data. The telling of a story then becomes a special event, perhaps one worthy of peer review in its traditional form. The forming of a “paper” is actually no more than providing new links, adding grist to the search and discovery mill, but it can retain its place as a high status object, merely losing its role as the only object worth considering.

So in short, publish fragments, comprehensively and rapidly. Weave those into a wider web of research communication, and from time to time put in the larger effort required to tell a more comprehensive story. This requires tools that are hard to build, standards that are hard to agree, and cultural change that at times seems like spitting into a hurricane. Progress is being made, in many places and in many ways, but how can we take this forward today?

Practical steps for today

I want to write more about these ideas in the future but here I’ll just sketch out a simple scenario that I hope can be usefully implemented locally but provide a generic framework to build out without necessarily requiring a massive agreement on standards.

The first step is simple, make a record, ideally an address on the web for everything we create in the research process. For data and software just the files themselves, on a hard disk is a good start. Pushing them to some sort of web storage, be it a blog, github, an institutional repository, or some dedicated data storage service, is even better because it makes step two easy.

Step two is to create feeds that list all of these objects, their addresses and as much standard metadata as possible, who and when would be a good start. I would make these open by choice, mainly because dealing with feed security is a pain, but this would still work behind a firewall.

Step three gets slightly harder. Where possible configure your systems so that inputs can always be selected from a user-configurable feed. Where possible automate the pushing of outputs to your chosen storage systems so that new objects are automatically registered and new feeds created.

This is extraordinarily simple conceptually. Create feeds, use them as inputs for processes. It’s not so straightforward to build such a thing into an existing tool or framework, but it doesn’t need to be too terribly difficult either. And it doesn’t need to bother the user either. Feeds should be automatically created, and presented to the user as drop down menus.

The step beyond this, creating a standard framework for describing the relationships between all of these objects is much harder. Not because its difficult, but because it requires an agreement on standards for how to describe those relationships. This is do-able and I’m very excited by the work at Southampton on the OREChem Experimental Ontology but the social problems are harder. Others prefer the Open Provenance Model or argue that workflows are the way to manage this information. Getting agreement on standards is hard, particularly if we’re trying to maximise their effective coverage but if we’re going to build a computable record of science we’re going to have to tackle that problem. If we can crack it and get coverage of the records via a compatible set of models that tell us how things are related then I think we will be will placed to solve the cultural problem of actually getting people to use them.

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The View From Mercury [Starts With A Bang] PDF Print E-mail

They will see us waving from such great heights
"Come down now," they'll say.
But everything looks perfect from far away
"Come down now," but we'll stay. -The Postal Service
It isn't the weekend, but I'd feel terrible showing you these pictures without giving you the right song to take you through it, so here's Iron & Wine's cover of a great song by The Postal Service:

Such Great Heights.

Back in the early 1970s, the United States sent the first spacecraft, successfully, towards Mercury, the innermost planet of our Solar System. Before losing its functionality, Mariner 10 managed to approach very close to Mercury, and took a series of hi-resolution photos that have since been corrected and stitched together to form the first hi-res mosaic of the closest world to the Sun.

mercury.jpg

It's taken over 30 years to get the second spacecraft launched and headed towards Mercury, but Messenger is there now, having performed three flybys and taken even better pictures than Mariner 10 had to offer.

MESSENGER-Mercury-Flyby-Huge.jpg

You'll notice that this world looks more like the Moon than any other planet we know of. It's full of craters, for one.

MESSENGER_Mercury_closeup_01_08.jpg

It's also loaded with very violent scars, such as those emanating from Spider Crater, shown here.

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Additionally, there are some mysterious, high mountains, such as that black feature to the lower right of the image below.

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And, I know it's just my own personal preferences, but I always enjoy images of the edge of the planet; of the border between bright, reflected sunlight and the blackness of deep space.

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Mercury is made out of the densest, heaviest elements of any planet in the Solar System; if it weren't for the effect of gravity, Mercury would be even denser than the Earth. (We are #1, you know.)

But very recently, Messenger did something absolutely spectacular, that I'd previously only seen done from Saturn and the Moon before: looked back and saw us.

earthmoon_messenger_big.png

Do you see us? At the lower left of the image above, we're the big disk with the smaller disk next to it: our Moon! Let's blow it up for you:

EarthMoon from Mercury.jpg

The Earth and Moon always look almost entirely "full" as seen from Mercury, and this picture is no exception. Messenger will enter into orbit, permanently, around Mercury on March 18th of next year, but a picture like this always makes me appreciate just how small, fragile, and lonely our world is against the backdrop of deep space.

So I hope you're enjoying one of the most beautiful sights the Universe has to offer; it's the least I can do to usher in the new month!

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Your Grant in Review: The "Overambitious" StockCritique [DrugMonkey] PDF Print E-mail

Gerty-Z has a post up musing on the tiredest of StockCritiques™..."The proposal is overambitious...".

The overall conclusion of the post, and the ensuing comments, was basically that this is totally meaningless and a grant applicant should ignore it. As Comrade PhysioProf put it:

This is pointless. The "too ambitious"/"not ambitious enough" shitte is a red herring.

I agree that this can be a meaningless, throwaway for a reviewer to put in the grant critique. But this doesn't exactly mean that it is totally meaningless and can be ignored with impunity.

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