Metamaterials and invisibility

The recent article in Science, Controlling Electromagnetic Fields, by J. B. Pendry from Department of Physics, Blackett Laboratory, Imperial College London, D. Schurig and D. R. Smith from the Department of Electrical and Computer Engineering, Duke University speculate on the use of metamaterials for creating invisibility cloaks

Using the freedom of design that metamaterials provide, we show how electromagnetic fields can be redirected at will and propose a design strategy. The conserved fields–electric displacement field D, magnetic induction field B, and Poynting vector S–are all displaced in a consistent manner. A simple illustration is given of the cloaking of a proscribed volume of space to exclude completely all electromagnetic fields. Our work has relevance to exotic lens design and to the cloaking of objects from electromagnetic fields.

source: science

[Photomedia Forum post by T.Neugebauer from May 26, 2006  ]

Science on television

Closer To Truth (PBS) is a television series that deals with “the fundamental questions of our times explored by creative and thoughtful scientists, scholars and artists.” The video archive contains past debates with scientists on everything from parapsychology, ESP, creativity, consciousness, music and art, etc…

[Photomedia Forum post by T.Neugebauer from Mar 20, 2006   ]

Secret Life of Plants

When I was introduced to the The Secret Life of Plants (1974) by Peter Tompkins & Christopher Bird a few years ago now, I read it if only because I happen to own a copy of the Stevie Wonder’s Journey Through the Secret Life of Plants (1979) on vinyl and I wanted to understand the relationship between these. It turns out that the liner notes of the Stevie Wonder album acknowledge that

The Secret Life of Plants is an Infinite Enterprises Film. Produced by Michael Braun. From the book “The Secret Life of Plants” by Peter Tomkins and Christopher Bird

The sense of synchronicity of having picked up, quite randomly, the Stevie Wonder album many years ago, and now having a friend show me this book was enough of a motivation to read on. I have not seen the film yet, and I echo the only user comment on that IMDB page: “Does anyone know how I can borrow or rent a copy?”

I received a press release yesterday from the non-profit public art group in New York, Creative Time about their Strange Powers exhibitions. Specifically what caught my attention was this ESP Plant Workshop by the Center for Tactical Magic, advertised as a free event Thu/Fri 4-7pm, Sat/Sun noon-7pm on 64 East 4th Street. The research into the idea of communication between plants and people is described in detail in Tompkins and Bird’s book. Yes, this type of research was carried out by many scientists and engineers not so long ago.

“Everybody believes that art can be a spiritual vehicle” says Laura Hoptman, of the exhibition’s two curators

from the press coverage section, Creative Time’s newest art spectacle takes a journey into the paranormal by Barbara Pollack, Time Out New York

The Secret Life of Plants describes the work of many scientists and engineers that seemed to believe science also to be a spiritual vehicle.

[Photomedia Forum post by T.Neugebauer from Aug 26, 2006  ]

Krzysztof Zanussi

I saw Illumination by Krzysztof Zanussi recently. It is a film about science: its ethics, politics, successes and failures, and the ambitious young physicist who is trying to find his way. Anyone who is interested in science would enjoy this film, and what is interesting is that even though this is a film from 1974, the issues and scientific accomplishments it covers are particularly relevant and current.


The film opens with a videorecording of prof. Władysław Tatarkiewicz explaining the primacy of purity of heart in illumination of the mind allowing for the direct perception of truth.

Illumination is St Augustine’s theory that moments of clarity and understanding come about in a Platonic revelation of the real world that is more a result of a purity of heart than intellectual effort. It is described not as an ecstatic moment that is free of thought but an exponential expansion of thought.

 


Zbigniew Zapasiewicz and Piotr Garlicki

Barwy ochronne is the 1976 film by Krzysztof Zanussi that I can’t seem to find the official English translation of the title, I would translate it as “Protective hues” or wait, I found it, “Camouflage”. The film was awarded the grand prix for the best picture at the Gdańsk film festival in 1977, but it is also not out of date today, still relevant to human dilemma. What has changed, perhaps, is the environment. Perhaps today the young academics would be offered a squash racket instead of the tennis racket, and a membership to an expensive health club in the city instead of the tennis court in the forest. The linguistics conference would be taking place in a metropolitan setting instead of the little lakeside resort in 1970s Poland. Lastly, perhaps today the plot would have more of a corporate corruption of the academia angle to it, but the fishbowl that is academia and the conflict between truth and convenience is just as relevant today.

[Photomedia Forum posts by T.Neugebauer from Jan-Mar, 2007]

Complexity, Metcalfe’s Law and Simplicity

Complexity can be defined as the number of components of a system, the number of relations between those components and the level of asymmetry in the structure of relations.

see also: What is complexity? by F. Heylighen

Robert Metcalfe, inventor of the Ethernet, is also the author of Metcalfe’s Law which states that the value of a telecommunications network is proportional to the square of the number of users of the system.

In the July 2006 IEEE Spectrum, Bob Briscoe, Odlyzko and Tilly argue that Metcalfe’s Law is Wrong because it overestimates the value of each connection. Reed’s law, on the contrary, suggests that Metcalfe’s law underestimates the value of adding connections since each member of the network is connected to individuals as well as subsets of the whole.

Metalfe’s law is general enough to be applicable to many systems. It has been used recently, for example, to argue for the “exponential” benefits of RDF and the semantic web

 

“the value of your information grows exponentially with your ability to combine it with new information.”

source: RDF and Metcalf’s law

In considering simplicity (the opposite of complexity?) in the context of interface design, I thought that this recent article by Luke Wroblewski made a pragmatic distinction between perception and reality

 

Many of us carry a few preconceived notions about simplicity. We assume things that are easy to use don’t have a lot of options and, as a result, shouldn’t appear cluttered when we first encounter them. In the world of product design, this means plenty of whitespace, clear calls to action, and an overall reduction of content—in the form of visual elements such as type, images, lines, colors, shapes, and so on. When a product has these attributes, we are more likely to assume it is easy to use. It’s quite possible that it might not be, but the perception of simplicity is there.

Conversely, a perception of complexity can turn customers, clients, or business stakeholders off before they ever actually use a product. In a worst-case scenario, an evaluation based on an opinion that “this looks cluttered; therefore, it must be difficult to use” can prevent customers from ever even trying a product out. But as Don Norman recently suggested, an initial impression of complexity might actually be an artifact of a product’s simplicity. In “The Truth About Google’s So-called ‘Simplicity’[…]

source: Complexity of Simplicity in UX matters

[Edited from Photomedia Forum posts by T.Neugebauer Jun – Dec, 2006]

Carl Jung’s The Undiscovered Self

I was drawn to my first C.G. Jung book by the cover, silver material that served as a mirror. When I first picked up the 1979 edition of The Undiscovered Self at The Word bookstore on Milton Street, I found myself reflected in it. Although tacky somehow, it was nevertheless a clever play on the theme of self-discovery. Time magazine used the same trick on their cover when they recently announced that the person of the year is you.

The inside blurb calls this short book Jung’s “most prophetic – and most influential”. It has certainly proved to be somewhat prophetic of today’s ongoing debate about religion and science. The Undiscovered Self speaks of a growing rift between faith and knowledge, a contrast that “has become so enormous that one is obliged to speak of the incommensurability of these two categories and their way of looking at the world.”

Jung avoids the common pitfall of today which seems to reduce the debate to caricatures completely ignorant of the opposing point of view. He distinguishes between religion which expresses a subjective relationship to certain metaphysical factors and a creed which merely gives expression to a collective belief. Religion is understood in the broad sense, including the relationship of the individual to the metaphysical and the world of dreams, feelings and intuitions. Science, on the other hand, is the rationalistic, statistical and theoretical part of understanding. Self-knowledge, according to Jung, cannot be achieved by abandoning either of these facets.

Rationalized scientific theories are by definition generalized truths that attempt to go beyond the individual case, yet self-knowledge requires special attention to those things that are unique, individual and defy generalization

 

Since self-knowledge is a matter of getting to know the individual facts, theories help very little in this respect. For the more a theory lays claim to universal validity, the less capable it is of doing justice to the individual facts. Any theory based on experience is necessarily statistical; that is to say, it formulates an ideal average which abolishes all exceptions at either end of the scale and replaces them by an abstract mean. This mean is quite valid, though it need not necessarily occur in reality. ( p.8 )

 

Statistical methods show us an ideal average, not empirical reality; distinctive facts are individual. The real picture could consist of nothing but exceptions,

There is and can only be self-knowledge based on theoretical assumptions, for the object of self-knowledge is an individual – a relative exception and an irregular phenomenon. ( p.9 ) 


The individual cannot be understood as a “recurrent unit” but as something unique and singular. Jung admits that man is also a “member of a species” to be described as a statistical, comparative unit from which “all individual features have been removed.” This gives us knowledge about the human species, but it does not give us understanding of the individual since it is these ‘removed’ features that are necessary for understanding.

It is possible to store and accumulate knowledge in the form of memories. Understanding cannot be stored in the same way because understanding refers to events and experiences, of which only the memories can be partially preserved. Perhaps it is these memories that are the basis of our knowledge, but the relationship to the experience of understanding is ultimately unknown.

When I attended Marvin Minsky’s presentation on artificial intelligence at Concordia University last year, he was unequivocal about the fact that “experience” is much too ambiguous a term to be used in any definition of understanding. He went on to claim that hearing the term ‘experience’ is a signal for him that the person uttering it is worthy only of dismissal. This was not the most controversial of his statements that afternoon: he seemed to go out of his way to insist that religion is to blame for most of the world’s failures, including stagnating progress in science and technology and the failure to deliver real artificial intelligence. For Minsky, understanding is reducible to neural and semantic nets, representations of structure and function. According to his view, insight, illumination and creativity are all “common sense terms”, like consciousness itself, along with empathy, moral reflection and sense of identity; all are in reality too ambiguous and when correctly defined, reducible to structure and function. He seemed to blame religion itself for the fact that his structure-functional definitions of these terms have yet to take over the normative meaning.

Jung writes of the incompleteness of the scientific view of an individual

Judged scientifically, the individual is nothing but a unit which repeats itself ad infinitum and could just as well be designated with a letter of the alphabet. ( p.11 ) 


Czeslaw Milosz’ Captive Mind does precisely that, designating the characters not by the names of the individuals on which the stories are based, but by the letters of the Greek alphabet Alpha, Beta, Gama and Delta. Jacques Ellul argues that propagandists address their influence to individuals understood solely as interchangeable units, he writes in the first chapter of Propaganda: On the Formation of Man’s Attitudes,

Modern propaganda reaches individuals enclosed in the mass, yet it also aims at a crowd, but only as a body composed of individuals. What does this mean? First of all, that the individual is never considered as an individual, but always in terms of what he has in common with others, such as his motivations, his feelings, or his myths. He is reduced to an average; and except for a small percentage, action based on averages will be effectual. (p. 6) 

 

With books by Dawkins and Hitchens on the best seller lists, ‘scientific’ attacks against religion have become a common part of popular culture. Jung points out that at the time of his writing The Undiscovered Self, the basic conviction of the day is becoming “increasingly rationalistic”. Moreover, the growing conflict between faith and knowledge “is a symptom of the split consciousness which is so characteristic of the mental disorder of our day.” Jung actually describes this split as a neurotic disturbance at the social level,

In view of this, it does not help matters at all if one party pulls obstinately to the right and the other to the left. This is what happens in every neurotic psyche, to its own deep distress, and it is just this distress that brings the patient to the doctor. ( p.74 )

 

[Photomedia Forum post by T.Neugebauer from  Feb 18, 2008 ]

His Holiness Dalai Lama speaks with neuroscientists

“Craving, suffering, and choice: Spiritual and scientific explorations of human experience”,  was the  title of one of the 3 events that took place at Stanford University in the fist week of November in 2005. There were also two other events on meditation and nonviolence. Although all of these were broadcast live over the Internet, it seems like only the collaborative meetings between His Holiness and the neuroscientists from Neuroscience Institute were available as video streams at the time, from the Internet Archive, “Craving and Choice” and “Suffering and Choice”, but both of these streams are now irretrievable


This type of collaboration is long overdue and gives me hope in academic research. It was particularly interesting to witness the contrast of approach in the morning session. Dalai Lama seems genuinely ‘confused’ as to how localizing particular ‘cravings’ in the brain and inhibiting them with drugs is considered medicine, since as he points out, this approach does not differentiate between necessary/good desires and afflicted cravings. Given that the same part of the brain can be responsible for different cravings at different times (the brain is highly adaptive), drug therapy of this sort would lead to a chase around the brain resulting in ‘disaster’: comatose patient without any desires whatsoever. The neuroscientist had a real difficult time accepting that he must be able to differentiate between those desires which are necessary (like thirst for water when you need it) and those which are afflicted, whereas the Dalai Lama thought the approach of eliminating ‘desire’ without making such a decision puzzling.

see also:
Thoughts on the mind from the Dalai Lama (Stanford Medicine Magazine)

Mind and Life Institute 

I could not find, among the webcasts available online, a link to videos of the September 2003 conference “Investigating the Mind”. A recent book, The Dalai Lama at MIT, documents the discussions during this 2003 meeting between the Dalai Lama and various scientists and scholars: Ajahn Amaro, Marlene Behrmann, Jonathan Cohen, Richard J. Davidson, Georges Dreyfus, R. Adam Engle, Daniel Gilbert, Tenzin Gyatso, Anne Harrington, Thupten Jinpa, Jerome Kagan, Daniel Kahneman, Nancy Kanwisher, Dacher Keltner, Stephen M. Kosslyn, Eric Lander, David E. Meyer, Daniel Reisberg, Matthieu Ricard, Evan Thompson, Anne Treisman, B. Alan Wallace, Arthur Zajonc. The topics discussed include attention, emotion, imagery and visualization. One of the major ways in which Western science departs from the Buddhist view is that the former characterizes emotions based on valence (positive/negative) and arousal (strength), whereas the latter makes the distinction between destructive/afflictive/nonvirtuous emotions and those that are virtuous or ethically neutral.

[Edited from Photomedia Forum posts from March 26, 2007]

 

 

difference between a theory and a law

There is a subtle but crucial difference between scientific theories and laws.

Laws are generalizations about what has happened, from which we can generalize about what we expect to happen. They pertain to observational data. The ability of the ancients to predict eclipses had nothing to do with whether they knew just how they happened; they had a law but not a theory.# Theories are explanations of observations (or of laws). The fact that we have a pretty good understanding of how stars explode doesn’t necessarily mean we could predict the next supernova; we have a theory but not a law.source: Dan Berger, MadSciNet

Thus, we have the law of gravity, and the theory of evolution. A theory does not become a law through a hierarchical promotion due to the collection of more and more supporting evidence.

McComas, William wrote, “
The problem created by the false hierarchical nature inherent in this myth [hypotheses become theories which become laws] is that theories and laws are very different kinds of knowledge. Of course there is a relationship between laws and theories, but one simply does not become the other–no matter how much empirical evidence is amassed. Laws are generalizations, principles or patterns in nature and theories are the explanations of those generalizations (Rhodes & Schaible, 1989; Homer & Rubba, 1979; Campbell, 1953).

source: “Ten myths of science: Reexamining what we think we know….,” Vol. 96, School Science & Mathematics, 01-01-1996, pp 10. http://www.bluffton.edu/~bergerd/NSC_111/TenMyths.html

[Photomedia Forum post by T.Neugebauer from Feb 26, 2006]

epistemology and the scientific method

William M. Trochim (Cornell University) has put together a research methods knowledge base that contains a good introduction to positivism, post-positivism and critical realism, the difference between induction and deduction, and the concept of validity.

 

Where the positivist believed that the goal of science was to uncover the truth, the post-positivist critical realist believes that the goal of science is to hold steadfastly to the goal of getting it right about reality, even though we can never achieve that goal! 

[Photomedia Forum post by T.Neugebauer from Feb 7, 2006]