Categories
slow

The importance of going slow

journals in a library
How can we assess the work of scientists? Should we count the number of papers that they write?

In the past few weeks there has been a bit of a media storm about the state of science. A paper that had been published in the journal Science, was retracted because it turned out that the study had, quite possibly, been faked. The retraction highlighted the problem of “publish or perish” which has been a concern for many scientists of late. A second article, this time an editorial in Nature, took a different and perhaps surprising perspective on things. Apparently the public trust scientists much more than scientists think that they do. Why would that be the case?

These two stories should concern us because they lie at the heart of a current problem in science. According to the dictionary, ‘science’ is “systematic and formulated knowledge”. Such knowledge takes time to develop, it takes us time to understand what goes on, both on an individual level and as a society. The ‘publish or perish’ culture acts in opposition to this. Within a ‘publish or perish’ culture, the way that science works is that the more papers that you have, especially those that get cited and are published in (apparently) good journals, the more successful you will be in your career and in your ability to get research funding. It is essential to publish “high impact” papers in order merely to survive in science. In more extreme cases this has led to data being faked and subsequent retractions of the papers (if it is ever discovered). Active faking of data though is only the tip of the iceberg. The pressure to publish high profile papers quickly, can lead to the original paper not having been investigated thoroughly enough. In fact, there are even motivations to publish too quickly. Firstly, if you are wrong, you just publish a second paper a few months later. Two papers, two sets of citations. Secondly, publishing early means getting there first, ie. more citations. It has got to the point where it is advantageous to quickly publish poor quality research with hyped key words than it is to do a thorough job and perhaps be beaten to the publication by a more incomplete work. This cannot be good for science or our society and it suggests that, in order to have a scientific career you must, to a greater or lesser extent, cease to behave scientifically. It is perhaps for this reason that scientists themselves have a doubt as to why the public would trust them, they no longer trust themselves.

lilies on water
Is there symbolism here? There’s certainly a lot of physics.

The ‘publish or perish’ culture has come about partly as a consequence of needing a metric by which to judge the worth of research. In itself this is understandable but it does suggest that we are no longer confident of our ability, as a society, to measure the ‘good’ of something. To judge something as ‘good for society’ necessarily involves many different inputs from many disciplines. Assessing something as good is a value judgement. To redefine ‘good’ purely into something that we measure (by profit, or by number of papers) is to artificially reduce what is good for society to an arbitrary, but on appearance scientific, method. Rather than admit that questions over what is ‘good science’ are, essentially, value judgements, we try to give a false ‘scientific’ measure of their worth, one based on citations and publications. We still have our biases but we have become less conscious of them and instead try to hide them with a false scientism.

How could we change this, how else can we assess who is a ‘good’ scientist or what research will benefit society? This is, I think where it is important for everyone to get involved and to slow down. It is open for everyone to investigate, for themselves, what they think would make a ‘good’ society. Clearly the quest for knowledge, and in particular scientific knowledge, will form part of that good but for us, as a society to realise what is good we need to stop and think about it. There is a need to encourage clear methods of thinking but at the same time everyone must feel eligible to be a part of this natural philosophy, purely as a consequence of their being a citizen of society. On a practical level, this can be achieved by our maintaining a sense of awe and wonder at the beauty of the world, and society, around us. In my own field of magnetism for example, to know the physics behind magnetic attraction is to make it more beautiful. And that is in essence what I am trying to communicate with Bean Thinking; just as an artist does with a painting, I am attempting to share the beauty that I see as a result of seeing physics all around me. The saying of Pierre Duhem that “Physical theory is a mathematical painting of reality” can be taken at many levels. As a scientist, I am to a certain extent, an artist.

rain drops on a tulip
A tulip in spring. The water droplets on the petals suggest some very deep physics. As the flower opens into the sunshine, each layer  (physical and metaphorical) of petals reveals a new level of beauty.

Of course, there is no immediate connection between appreciating the beauty of knowledge and allocating research funds. Yet if we, as a society, appreciate science and beauty where we see it, we are going to slowly move back to a more sustainable, scientific way of doing science. “By learning to see and appreciate beauty, we learn to reject self-interested pragmatism”¹. By allowing ourselves to assess the good of society across many measures, we recover science. Denying the fact that what qualifies as ‘good’ is ultimately a value judgement and instead covering it in false metrics, imperils science. It is in the history of humanity to ask ‘why’. Moving to a predominantly technology driven quasi-science does not enrich us as a species. Good art, good music, great science can. Great discoveries of the past have not been obtained by chasing the latest chimera of a device, they have been uncovered through an insatiable curiosity. A demand to know ‘why’ things are the way they are. We are destroying the very science we are so keen to promote if we conform to the key-word, hype and technology driven ‘publish or perish’ culture. It has got to the point where, in order to save science, it is imperative that we, as a society, recover our ability to appreciate the beauty in science.

I hope that Bean Thinking prompts at least some people to question the world around them. It is not important to agree with what is written in Bean Thinking indeed, perhaps with some things it is more important to disagree. The key thing is to notice the world around. The practise of slowing down and noticing things is the reasoning behind the cafe-physics reviews, as much as anything it enables me to practise slowing down and noticing too. To slow down and to appreciate what is there will mean that slowly, imperceptibly perhaps, we challenge the culture of ‘publish or perish’. To do so may not be too far short of a need to recover our humanity, to quote Laudato Si’ again, “[w]e need to see that what is at stake is our own dignity”².

¹ Pope Francis, Laudato Si’, (2015) #215

² ibid, #160

Further thoughts:

Michael Polanyi “Science, Faith and Society”, Sapientia Press, 1964

Michael Polanyi “Personal Knowledge: Towards a post-critical philosophy”, University of Chicago Press, 1974

Categories
Home experiments Observations

Levitating water

V60 from Leyas
Time to look more closely at the surface of your black coffee.

Have you ever sat watching the steam that forms above a hot Americano? Beneath the swirling steam clouds you can occasionally see patterns of a white mist that seem to hover just above the dark brew. Bean Thinking is about taking time to notice what occurs in a coffee cup and yet I admit, I had seen these mists and thought that it was something that was just associated with the evaporation of the water and that “someone”, “somewhere” had probably explained it. So it was entirely right that I was recently taken to task (collectively with others who have observed this phenomenon and taken the same attitude) for this assumption by the authors of this paper who wrote “The phenomenon that we studied here can be observed everyday and should have been noticed by many scientists, yet very few people appear to have imagined such fascinating phenomena happening in a teacup.

ineedcoffee.com, espresso grind
The water particles in the white mist are a similar size to the smallest particles in an espresso grind. Photo courtesy of ineedcoffee.com, (CC Attribution, No Derivs). The coin shown is a US nickel of diameter 21.21 mm

The authors of the study show that the white mists (these “fascinating phenomena”) are, in fact, layers of water drops that have a typical diameter of around 10 μm (which is roughly the size of the smallest particles in an espresso grind). Although the white mists exist above tea and even hot water as well as coffee, they are probably easiest to see against the black surface of the Americano.

More surprising than the fairly uniform distribution of water droplet size though is the fact that the authors of this study showed that the droplets were levitating above the coffee. Each water droplet was somehow literally hovering above the surface of the coffee at a height of between 10 – 100 μm (which is, coincidentally, roughly the particle size distribution in an espresso grind).

white mists, slow science
You can (just about) see the white mists over the surface of this cup of tea (which is a still from the video below)

One of the questions that the authors of the paper have not yet managed to answer is what is causing this levitation? Could it be the pressure of the hot coffee evaporating that keeps these particles held aloft? This would explain the observation that the mists form patterns similar to those caused by (heat) convection currents. Alternatively perhaps the droplets are charged and are kept away from the coffee by electrostatic repulsion, an explanation that is suggested by the behaviour of the droplets when near a statically charged object (eg. hair comb, balloon, try it). Perhaps the levitation is caused by the droplets spinning and inducing an air cushion under them? Why not design some experiments and try to find out. It would be great if we can drink hot black coffee in the name of science. Let me know the results of your observations in the comments section below. In the meanwhile, here is a video of the white mists in tea, enjoy your coffee:

You can read the study at: Umeki et al., Scientific Reports, 5, 8046, (2015)

 

Categories
General Science history slow

Of worms and grind

coffee ground, grind, composting
What do you do with your used coffee grounds?

What do you do with your finished coffee grounds? Feed them straight to the plants? Donate them to Biobean to be transformed into fuel? Or perhaps turn them into compost with a worm bin? Ground to Ground is a website dedicated to sharing information about what can be done with old grounds. My preferred option though is the worm bin. Each Chemex of coffee grounds gets put out into the “can-o-worms” compost bin ready to be transformed into compost and plant fertiliser.

I had thought that there could be very little connection between my worms (so to speak) and the Bean Thinking website. However, I recently came across an anecdote about Charles Darwin that, to me at least, unites some of what Bean Thinking is about with my can-o-worms.

can-o-worms, worms, coffee grounds, composting
The top layer of my worm bin. You can just see some coffee grounds but it is mostly cabbage.

Darwin’s last book was “The formation of vegetable mould through the action of worms” published in 1881. After Darwin’s death (in 1882), Edward Aveling (1849-1898) wrote about meeting Darwin years earlier. In “Charles Darwin and Karl Marx: A Comparison” (1897), Aveling wrote: “I remember, in my youthful ignorance, asking Darwin why he dealt with animals so insignificant as worms. I shall not forget his reply, or the look that accompanied it. ‘I have been studying their habits for forty years’.”

By studying what to others looks insignificant, Darwin had made huge progress in our understanding of worm behaviour. This has led to our current knowledge about the contribution of worms to the ecosystem and the benefits of composting our coffee grounds, both for our plants and our planet. It strikes me that we can all benefit from slowing down and noticing what seems insignificant.

Perhaps you do something unusual with your old coffee grounds? Maybe you have noticed something about coffee grounds and worm behaviour. Whatever it is, do let me know in the comments section below.