Blogs about: Science Notes

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Science according to Dr. Kamal Haasan

Today’s Cinema Plus carries an interview with Kamal Sir[*]. As usual Kamal’s uncanny wit shows up when inquired about why he is not into politics as his peers seem to do, when he quips It … more →

Unruled Notebook

Science according to Dr. Kamal Haasan — 9 comments

Arunn wrote 3 months ago: Today’s Cinema Plus carries an interview with Kamal Sir[*]. As usual Kamal’s uncanny wit … more →

Tags: Asides, Atom Bomb, bad science, BUTTERFLY EFFECT, chaos theory, Dasavatharam, Dasavatharam Movie, kamal haasan, Kamal hasan

Stefan and the Polar Ice Caps

Arunn wrote 3 months ago: Melting of polar ice caps is a topic of current interest due to global warming and its impact. But n … more →

Tags: Lecture Notes, thermal sciences, josef stefan, melting, numerical simulation, Polar Ice Caps, Polar Ice Growth, Research, Science

Stefan and the T to the fourth power law — 6 comments

Arunn wrote 3 months ago: The working of Stefan’s diathermometer to measure the thermal conductivity was explained earlier. He … more →

Tags: thermal sciences, boltzmann, Electromagnetic Radiation, Heat transfer, josef stefan, Physics, Radiation, radiation law, Science

Stefan and the Diathermometer — 2 comments

Arunn wrote 3 months ago: Once in a while, it is useful to revisit the history of inventions and discoveries that we now take … more →

Tags: thermal sciences, experimental research, heat conduction, Heat transfer, josef stefan, Physics, Science, science history, Thermal Conductivity

Trisanku Swarga and Alpha Centauri — 10 comments

Arunn wrote 3 months ago: In Indian mythology Sage Viswamitra is known for his tapOpalam – prowess from penance – … more →

Tags: Alpha Centauri, astronomical phenomenon, astronomy, Centaurus, Indian astronomy, Indian mythology, rigel kent, Science, trisankku swarga

Avenue de Henri Benard

Arunn wrote 4 months ago: When a flow happens around a solid body, at certain speeds, the flow downstream of the body separate … more →

Tags: fluid sciences, Earth Observatory, Fluid mechanics, henri benard, jay mayen island, karman vortex street, karman vortices, nasa pictures, strouhal number

Random Variable

Arunn wrote 4 months ago: Suppose we have a collection of y articles (say y = 100) out of which say, x articles are bad on … more →

Tags: maths, Probability, Probability distributions

Lotus Effect and Superhydrophobic Coatings using Carbon Nano Tubes — 2 comments

Arunn wrote 6 months ago: Since the discovery of the lotus effect by Barthlott and Neinhuis [1], there have been efforts to de … more →

Tags: Information, carbon nano-tubes, hydrophobic surfaces, lotus effect, lotus leaf effect, lotus leaves, Science, superhydrophobic

Lotus Leaves, Hydrophobic and Omniphobic Surfaces — 2 comments

Arunn wrote 7 months ago: Surfaces can be hydrophobic. Like Lotus leaves [1]. They can be superhydrophobic. Like soot coated d … more →

Tags: Hydrophobic, hydrophobic surface, Lotus, lotus effect, lotus leaves, Materials, oil repellant, omniphobic, Physics

Firing Fungus — 2 comments

Arunn wrote 8 months ago: Fungus eject their spores to the surrounding by different mechanisms. One such mechanism is the squi … more →

Tags: air drag, Biology, biology video, cow dung, fluid dynamics, Fluid mechanics, fungi reproduction, fungus, fungus video

Schlieren, Ares V and Coughing

Arunn wrote 8 months ago: We don’t get to see directly with our eye, shock waves arising in air or shimmers of hot air. … more →

Tags: fluid sciences, ares 5, Coughing, coughing images, flow visualization, Fluid mechanics, health, high speed flows, nasa ares

Information Entropy

Arunn wrote 9 months ago: Information and uncertainty are quantities that describe any decision making process – like se … more →

Tags: Lecture Notes, Entropy, Information entropy, information theory, Shannon entropy, uncertainty

Science

Arunn wrote 10 months ago: The following title list links to notes and essays on various Science topics. I hope the content and … more →

Boiling Song by the Kitchen Band

Arunn wrote 11 months ago: Here is the rambunctious boiling song from the one and only kitchen band. [Boiling Song MP3 File. Si … more →

Tags: Lecture Notes, thermal sciences, boiling, convection, Heat transfer, phase change, boiling phenomenon, Physics

What is a Porous Medium — 4 comments

Arunn wrote 11 months ago: What is a porous medium? A popular definition is “A porous medium is a solid structure with intercon … more →

Tags: fluid sciences, Lecture Notes, porous medium, Fluid mechanics, Geology, porous medium flows, Science

The Koch Curve — 1 comment

Arunn wrote 11 months ago: The Koch Curve or the von Koch snowflake was discovered by Helge von Koch (1870-1924) in 1904. It is … more →

Tags: Lecture Notes, fractals, koch curve, Koch Snowflake, mathematics, Physics

Convection Carnot Engine

Arunn wrote 11 months ago: Convection can be distinguished into two types: forced and natural or free [1]. When thermal gradien … more →

Tags: Lecture Notes, thermal sciences, carnot engine, convection, First Law, free convection, Heat transfer, natural convection, Physics

Scale Analysis — 1 comment

Arunn wrote 1 year ago: Scale analysis or order of magnitude analysis is a back of the envelope [1] method for deriving the … more →

Tags: Lecture Notes, thermal sciences, Analysis, Analytical Methods, back of envelope, conduction, Heat transfer, Physics, scale analysis

First Law and Fourier Law — 1 comment

Arunn wrote 1 year ago: First Law of thermodynamics relates heat transfer, work transfer and internal energy of a body. Four … more →

Tags: Lecture Notes, thermal sciences, First Law, Fourier, fourier law, Heat transfer, Science, Thermodynamics, conduction


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