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Revealing the ancient Chinese secret of sticky rice mortar

ScienceDaily (2010-06-01) — Scientists have discovered the secret behind an ancient Chinese mortar made from sticky rice, that delicious “sweet rice” that is a modern mainstay in Asian dishes. They also concluded that the mortar — a paste used to bind and fill gaps between bricks, stone blocks and other construction materials — remains the best available material for restoring ancient buildings.

The definitive URL for the Yang et al. article is: http://dx.doi.org/10.1021/ar9001944

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Biology may not be so complex after all, physicist finds

Secondary Source Summary

ScienceDaily (2010-03-19) — Centuries ago, scientists began reducing the physics of the universe into key laws described by a handful of parameters. Such simple descriptions have remained elusive for complex biological systems — until now. A biophysicist has identified parameters for several biochemical networks that distill the entire behavior of these systems into simple equivalent dynamics. The discovery may hold the potential to streamline the development of drugs and diagnostic tools, by simplifying the research models.


References:

Emory University (2010, March 19). Biology may not be so complex after all, physicist finds. ScienceDaily. Retrieved March 19, 2010, from http://www.sciencedaily.com /releases/2010/03/100301102757.htm

Primary Source Abstract

Biochemical processes typically involve huge numbers of individual reversible steps, each with its own dynamical rate constants. For example, kinetic proofreading processes rely upon numerous sequential reactions in order to guarantee the precise construction of specific macromolecules. In this work, we study the transient properties of such systems and fully characterize their first passage (completion) time distributions. In particular, we provide explicit expressions for the mean and the variance of the completion time for a kinetic proofreading process and computational analyses for more complicated biochemical systems. We find that, for a wide range of parameters, as the system size grows, the completion time behavior simplifies: it becomes either deterministic or exponentially distributed, with a very narrow transition between the two regimes. In both regimes, the dynamical complexity of the full system is trivial compared to its apparent structural complexity. Similar simplicity is likely to arise in the dynamics of many complex multistep biochemical processes. In particular, these findings suggest not only that one may not be able to understand individual elementary reactions from macroscopic observations, but also that such an understanding may be unnecessary.


References:

Golan Bel, Brian Munsky, Ilya Nemenman. The simplicity of completion time distributions for common complex biochemical processes. Physical Biology, 2009; 7 (1): 016003 DOI: 10.1088/1478-3975/7/1/016003

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NASA: Grades 5 – 12 Engineering Design Process


References:

NASA – Engineering Design Process. Retrieved March 18, 2010 from http://www.nasa.gov/audience/foreducators/plantgrowth/reference/Eng_Design_5-12.html

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NASA: Elementary School Standard-Based Engineering Design Process


References:

NASA – Elementary School Standard-Based Engineering Design Process. Retrieved March 17, 2010 from http://www.nasa.gov/audience/foreducators/plantgrowth/reference/Eng_Design_K4.html

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Mann (2005, p.124): Structured Problem Solving Steps

Step 1 Identify and define the problem
Step 2 Quarantine the problem and take other immediate remedial actions
Step 3 Involve the appropriate, knowledgeable people
Step 4 Conduct root cause analysis
Step 5 Identify root cause solutions, assess them, and test the preferred alternative
Step 6 Implement the root cause solution
Step 7 Monitor and revise the solution as indicated by performance data

References:

Mann, David William (2005). Creating a lean culture: tools to sustain lean conversions. New York, NY, USA: Productivity Press

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Kridnix (2009): The “Big Picture”

Sciences Humanities Design
What is studied The natural world The human world The artificial world
Methods Experiment

Classification

Analysis

Analogy

Metaphor

Evaluation

Modeling

Pattern formation

Synthesis

Values Objectivity

Rationality

Search for truth

Subjectivity

Imagination

Search for justice

Practicality

Ingenuity

Search for appropriateness


References:

kridnix (2009, August 24). Engineering Science v.s. Engineering Design [Video file]. Retrieved from http://www.youtube.com/watch?v=WJXhcz8u7j8

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Aristotle: Physics. Book IV Chapter 14. (Translated by R.P. Hardie and R.K. Gaye)

These distinctions having been drawn, it is evident that every change and everything that moves is in time; for the distinction of faster and slower exists in reference to all change, since it is found in every instance. In the phrase ‘moving faster’ I refer to that which changes before another into the condition in question, when it moves over the same interval and with a regular movement; e.g. in the case of locomotion, if both things move along the circumference of a circle, or both along a straight line; and similarly in all other cases. But what is before is in time; for we say ‘before’ and ‘after’ with reference to the distance from the ‘now’, and the ‘now’ is the boundary of the past and the future; so that since ‘nows’ are in time, the before and the after will be in time too; for in that in which the ‘now’ is, the distance from the ‘now’ will also be. But ‘before’ is used contrariwise with reference to past and to future time; for in the past we call ‘before’ what is farther from the ‘now’, and ‘after’ what is nearer, but in the future we call the nearer ‘before’ and the farther ‘after’. So that since the ‘before’ is in time, and every movement involves a ‘before’, evidently every change and every movement is in time.
It is also worth considering how time can be related to the soul; and why time is thought to be in everything, both in earth and in sea and in heaven. Is because it is an attribute, or state, or movement (since it is the number of movement) and all these things are movable (for they are all in place), and time and movement are together, both in respect of potentiality and in respect of actuality?
Whether if soul did not exist time would exist or not, is a question that may fairly be asked; for if there cannot be some one to count there cannot be anything that can be counted, so that evidently there cannot be number; for number is either what has been, or what can be, counted. But if nothing but soul, or in soul reason, is qualified to count, there would not be time unless there were soul, but only that of which time is an attribute, i.e. if movement can exist without soul, and the before and after are attributes of movement, and time is these qua numerable.
One might also raise the question what sort of movement time is the number of. Must we not say ‘of any kind’? For things both come into being in time and pass away, and grow, and are altered in time, and are moved locally; thus it is of each movement qua movement that time is the number. And so it is simply the number of continuous movement, not of any particular kind of it.
But other things as well may have been moved now, and there would be a number of each of the two movements. Is there another time, then, and will there be two equal times at once? Surely not. For a time that is both equal and simultaneous is one and the same time, and even those that are not simultaneous are one in kind; for if there were dogs, and horses, and seven of each, it would be the same number. So, too, movements that have simultaneous limits have the same time, yet the one may in fact be fast and the other not, and one may be locomotion and the other alteration; still the time of the two changes is the same if their number also is equal and simultaneous; and for this reason, while the movements are different and separate, the time is everywhere the same, because the number of equal and simultaneous movements is everywhere one and the same.
Now there is such a thing as locomotion, and in locomotion there is included circular movement, and everything is measured by some one thing homogeneous with it, units by a unit, horses by a horse, and similarly times by some definite time, and, as we said, time is measured by motion as well as motion by time (this being so because by a motion definite in time the quantity both of the motion and of the time is measured): if, then, what is first is the measure of everything homogeneous with it, regular circular motion is above all else the measure, because the number of this is the best known. Now neither alteration nor increase nor coming into being can be regular, but locomotion can be. This also is why time is thought to be the movement of the sphere, viz. because the other movements are measured by this, and time by this movement.
This also explains the common saying that human affairs form a circle, and that there is a circle in all other things that have a natural movement and coming into being and passing away. This is because all other things are discriminated by time, and end and begin as though conforming to a cycle; for even time itself is thought to be a circle. And this opinion again is held because time is the measure of this kind of locomotion and is itself measured by such. So that to say that the things that come into being form a circle is to say that there is a circle of time; and this is to say that it is measured by the circular movement; for apart from the measure nothing else to be measured is observed; the whole is just a plurality of measures.
It is said rightly, too, that the number of the sheep and of the dogs is the same number if the two numbers are equal, but not the same decad or the same ten; just as the equilateral and the scalene are not the same triangle, yet they are the same figure, because they are both triangles. For things are called the same so-and-so if they do not differ by a differentia of that thing, but not if they do; e.g. triangle differs from triangle by a differentia of triangle, therefore they are different triangles; but they do not differ by a differentia of figure, but are in one and the same division of it. For a figure of the one kind is a circle and a figure of another kind of triangle, and a triangle of one kind is equilateral and a triangle of another kind scalene. They are the same figure, then, that, triangle, but not the same triangle. Therefore the number of two groups also-is the same number (for their number does not differ by a differentia of number), but it is not the same decad; for the things of which it is asserted differ; one group are dogs, and the other horses.
We have now discussed time-both time itself and the matters appropriate to the consideration of it.


 

References:

Aristotle. Physics. Translated by R.P. Hardie and R.K. Gaye. Rendered into HTML by Steve Thomas. eBooks @ Adelaide. 2007. http://ebooks.adelaide.edu.au/a/aristotle/physics/book4.html (accessed Feb 11, 2010)

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