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- February 8, 2012
- 12:44 PM
- 437 views
Bio-heat transfer simulation of retinal laser irradiation
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
From 2008, we have been investigating the effects of (human) retinal laser irradiation, a specific project of the general bio-thermo-fluids problem of laser interaction with tissues irrigated by blood flow. The work was done with suitable and timely input from (Dr. Lingam Gopal, then Chairman of) the research division of Shankar Nethralaya, a Chennai-based leading [...]... Read more »
Narasimhan, A., & Jha, K. (2011) BIO-HEAT TRANSFER SIMULATION OF SQUARE AND CIRCULAR ARRAY OF RETINAL LASER IRRADIATION. Frontiers in Heat and Mass Transfer, 2(3). DOI: 10.5098/hmt.v2.3.3005
Jha, K., & Narasimhan, A. (2011) Three-dimensional bio-heat transfer simulation of sequential and simultaneous retinal laser irradiation. International Journal of Thermal Sciences, 50(7), 1191-1198. DOI: 10.1016/j.ijthermalsci.2011.02.005
- November 21, 2011
- 09:35 PM
- 401 views
Role of Porous Medium Modelling in Biothermofluids
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Biothermology or Bio- fluid flow and heat transfer is an important and developing subdivision of bioengineering. Seeking simplifications for biological processes that are inherently complex, is an exciting and useful multidisciplinary pursuit. Recently, I was invited to write a review article on the role of porous medium modelling in biothermofluids for the IISc Journal, a … Continue reading »... Read more »
Arunn Narasimhan. (2011) The Role of Porous Medium Modeling in Biothermofluids. Journal of the Indian Institute of Science, 91(3), 243-266. info:other/
- October 17, 2011
- 08:19 AM
- 447 views
Notes on Chen and Holmes Bio-heat Transfer Model
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Living tissues are complex structures made primarily of tissue and blood. The tissue is supposedly solid, while in reality, it is a mix of solid constituents and stagnant blood. The blood part is assumed capable of flowing, through arteries, veins and smaller capillaries that irrigate the tissue. A bio-material is, in principle, any material that can interact with biological systems. … Continue reading …... Read more »
Chen, M., & Holmes, K. (1980) MICROVASCULAR CONTRIBUTIONS IN TISSUE HEAT TRANSFER. Annals of the New York Academy of Sciences, 335(1 Thermal Chara), 137-150. DOI: 10.1111/j.1749-6632.1980.tb50742.x
- August 8, 2011
- 12:13 AM
- 843 views
Crop circle hoax and science
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Crop circles have been popular ever since hoaxes were, and should remain more popular than any of your G+ circles. It is one more (here is another) of those instances — unlike downright crap like Quan-dumb Table or Nano Art — where Art is created out of crafted and conjured up Science. Interestingly, over decades, [...]... Read more »
Haselhoff, E. (2001) Opinions and comments on Levengood WC, Talbott NP (1999) Dispersion of energies in worldwide crop formations. Physiol Plant 105: 615-624. Physiologia Plantarum, 111(1), 123-124. DOI: 10.1034/j.1399-3054.2001.1110116.x
- August 5, 2011
- 02:52 PM
- 844 views
Evidence of flowing water on Mars?
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Nasa reports first evidence of flowing water on Mars says Times of India. NASA better report the evidence now. They actually do report it, but with a good amount of reservation — so unlike of them, if you ask their Arsenic Bacteria – with a title reading, NASA Spacecraft Data Suggest Water Flowing On Mars. [...]... Read more »
McEwen, A., Ojha, L., Dundas, C., Mattson, S., Byrne, S., Wray, J., Cull, S., Murchie, S., Thomas, N., & Gulick, V. (2011) Seasonal Flows on Warm Martian Slopes. Science, 333(6043), 740-743. DOI: 10.1126/science.1204816
- March 2, 2011
- 11:39 AM
- 1,199 views
White Roofs and Global Warming
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Let us discuss white roofing our homes, to reduce the urban heat island effect. This in turn could also help reduce global warming. A material can reflect, transmit, absorb and emit visible, infra-red and ultraviolet radiation coming from the Sun. Most materials do all of this in varying degrees so we express these properties as [...]... Read more »
Menon, S., Akbari, H., Mahanama, S., Sednev, I., & Levinson, R. (2010) Radiative forcing and temperature response to changes in urban albedos and associated CO2 offsets . Environmental Research Letters, 5(1), 14005. DOI: 10.1088/1748-9326/5/1/014005
- February 23, 2011
- 09:03 PM
- 1,250 views
Cell Phones and Brain
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
I was about to give this post a news-paper-like title Cell phone usage affects brain — then I figured I should be knowing that usage of anything by us, should affect our brain. So I have settled for this rather bland title. A research paper authored by nine (first author Nora D. Volkow, MD, National [...]... Read more »
Volkow, N., Tomasi, D., Wang, G., Vaska, P., Fowler, J., Telang, F., Alexoff, D., Logan, J., & Wong, C. (2011) Effects of Cell Phone Radiofrequency Signal Exposure on Brain Glucose Metabolism. JAMA: The Journal of the American Medical Association, 305(8), 808-813. DOI: 10.1001/jama.2011.186
- December 16, 2010
- 01:10 PM
- 889 views
Extreme Homeopathic Delusions?
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
There is a news item in today’s (Dec 16th) online edition of Times of India titled IITB team show how Homeopathy works. When directed to this news item through a group email alert, I thought it is one of those bland TOI humor column. The news item was promising to be one when it began, [...]... Read more »
Chikramane, P., Suresh, A., Bellare, J., & Kane, S. (2010) Extreme homeopathic dilutions retain starting materials: A nanoparticulate perspective. Homeopathy, 99(4), 231-242. DOI: 10.1016/j.homp.2010.05.006
- December 9, 2010
- 01:04 PM
- 911 views
No Anomalous Enhancement of Nano-fluid Thermal Conductivity
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Nano was a buzz word a decade back in the USA. The buck was on anything prefixed with nano. Some useful technology did burgeon, identified now as nano-technology. Solar power, electronics and biotechnology were impacted with nano-engineered materials, capacitors and nano-probes and drug delivery methods. Chemistry and material science research in nano prospered with carbon [...]... Read more »
Buongiorno, J., Venerus, D., Prabhat, N., McKrell, T., Townsend, J., Christianson, R., Tolmachev, Y., Keblinski, P., Hu, L., Alvarado, J.... (2009) A benchmark study on the thermal conductivity of nanofluids. Journal of Applied Physics, 106(9), 94312. DOI: 10.1063/1.3245330
- December 3, 2010
- 11:50 AM
- 717 views
Arsenic is the New DNA Lace
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Carbon based bi-peds have found evidence for an alternate brotherhood in their Life tree. Life as we know of it until now is made of and thrive using Carbon, Hydrogen, Oxygen, Nitrogen and Phosphorous. Geomicrobiologist Felissa Wolfe-Simon and colleagues – patronized by Paul Davies and funded by NASA – have now found evidence that a [...]... Read more »
Wolfe-Simon, F., Blum, J., Kulp, T., Gordon, G., Hoeft, S., Pett-Ridge, J., Stolz, J., Webb, S., Weber, P., Davies, P.... (2010) A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus. Science. DOI: 10.1126/science.1197258
- September 1, 2010
- 02:32 PM
- 596 views
- August 31, 2010
- 08:33 AM
- 670 views
- August 23, 2010
- 01:59 PM
- 999 views
Yawns help cool the brain?
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Yawning when it is extremely cold may be maladaptive, as this may send unusually cold air to the brain, which may produce a thermal shock."
Shouldn't I yawn anymore in a department meeting conducted in an air conditioned room? ... Read more »
GALLUP, A., MILLER, M., & CLARK, A. (2009) Yawning and thermoregulation in budgerigars, Melopsittacus undulatus. Animal Behaviour, 77(1), 109-113. DOI: 10.1016/j.anbehav.2008.09.014
- May 21, 2010
- 10:52 AM
- 1,032 views
Inner Life of Mesoorganisms
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
The title of both this note and the paper it discusses is inspired by a 1970s classic paper by Nobel Laureate Edward Purcell on Life at low Reynolds number. With simple physics, that paper gave insights about micro-organisms (bacteria, sperms … Continue reading →... Read more »
van de Meent JW, Tuval I, & Goldstein RE. (2008) Nature's microfluidic transporter: rotational cytoplasmic streaming at high Péclet numbers. Physical review letters, 101(17), 178102. PMID: 18999789
- December 10, 2009
- 01:21 PM
- 1,710 views
Blood: Clot, Flow and Slip
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
By 2020 seventy percent of the heart patients of the World, a study suggests, would be in India. The cause seems genetic. The gene that codes the enzyme called PON1 is defective in Indians and predisposes them to heart ailments and diabetes. Coupled with degenerating lifestyle – eating habits – leads to such a dire [...]... Read more »
Kaoui, B., Biros, G., & Misbah, C. (2009) Why Do Red Blood Cells Have Asymmetric Shapes Even in a Symmetric Flow?. Physical Review Letters, 103(18). DOI: 10.1103/PhysRevLett.103.188101
- December 5, 2009
- 10:34 AM
- 968 views
Quantifying Research Quality using Article Level Metrics
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Quantifying research quality is a buzz-activity in academia for the last two decades. The irony is lost in the paper work. For reasons best left out in this essay, this activity has come to stay in our academics. One such quantifying-quality measure (QQM) evolved recently is the Impact Factor (IF) of journals [1] that publish [...]
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Neylon, C., & Wu, S. (2009) Article-Level Metrics and the Evolution of Scientific Impact. PLoS Biology, 7(11). DOI: 10.1371/journal.pbio.1000242
- November 18, 2009
- 12:19 PM
- 1,055 views
Why do Toucans have large bill
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
What can one do with the nose? If one were Cleopatra of Egypt, she could rule Rome. If one were the unfortunate Sphinx of Egypt, his form minus the nose could become the wonderment of the World. If one were Tycho Brahe, he could remove the nose, for polishing amidst a heated debate or duel, [...]... Read more »
Tattersall, G., Andrade, D., & Abe, A. (2009) Heat Exchange from the Toucan Bill Reveals a Controllable Vascular Thermal Radiator. Science, 325(5939), 468-470. DOI: 10.1126/science.1175553
- October 7, 2009
- 01:27 PM
- 1,165 views
Pennes Bioheat Transfer Equation
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
It can be argued that one of the most influential articles ever published in the Journal of Applied Physiology is the Analysis of tissue and arterial blood temperatures in the resting human forearm by Harry H. Pennes, which appeared in Volume 1, No. 2, published in August, 1948. Thus begins Prof. Wissler, his 1998 revisit [...]... Read more »
PENNES HH. (1948) Analysis of tissue and arterial blood temperatures in the resting human forearm. Journal of applied physiology, 1(2), 93-122. PMID: 18887578
- September 30, 2009
- 02:09 AM
- 1,147 views
Where should that new store or temple be?
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
Where should a business set up its new commercial store – chain or single – to maximize its profit? There may be a demand for the store in a sparsely populated region but it may be wiser to locate the store in a densely populated region for more profit. Is there a definite correlation between population density and commercial facility density?
Similarly, if the government or citizen group wants to locate a public facility – temples, toilets, grocery store, fire station &ndas........ Read more »
Um, J., Son, S., Lee, S., Jeong, H., & Kim, B. (2009) Scaling laws between population and facility densities. Proceedings of the National Academy of Sciences, 106(34), 14236-14240. DOI: 10.1073/pnas.0901898106
- September 9, 2009
- 11:45 AM
- 1,305 views
When a Mobius ring is dropped into a fluid
by Arunn in nOnoScience (a.k.a. Unruled Notebook)
We have heard of the Mobius band. A one sided strip, it is a topological peculiarity. Over the decades it has popped up in several places in knowledge-space: the self-induction free Mobius resistor, the Mobius gear, the shape of the trajectory the Solar wind plasma assume in their route to chaos when interacting with the [...]... Read more »
Leweke, T., Thompson, M., & Hourigan, K. (2009) Motion of a Möbius band in free fall. Journal of Fluids and Structures, 25(4), 687-696. DOI: 10.1016/j.jfluidstructs.2009.04.007
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