Nucleation is the first step in the formation of either a new thermodynamic phase or a new structure via self-assembly or self-organization. Nucleation is typically defined to be the process that determines how long an observer has to wait before the new phase or self-organized structure appears. For example, if a volume of water is cooled (at atmospheric pressure) below 0 °C, it will tend to freeze into ice, but volumes of water cooled only a few degrees below 0 °C often stay completely free of ice for long periods. At these conditions, nucleation of ice is either slow or does not occur at all. However, at lower temperatures nucleation is fast, and ice crystals appear after little or no delay. Nucleation is a common mechanism which generates first-order phase transitions, and it is the start of the process of forming a new thermodynamic phase. In contrast, new phases at continuous phase transitions start to form immediately. Nucleation is often very sensitive to impurities in the system. These impurities may be too small to be seen by the naked eye, but still can control the rate of nucleation. Because of this, it is often important to distinguish between heterogeneous nucleation and homogeneous nucleation. Heterogeneous nucleation occurs at nucleation sites on surfaces in the system. Homogeneous nucleation occurs away from a surface. (Wikipedia).
Simplest Maths - Basic Maths and Numeracy - start from scratch maths
Very simple reminder for those wanting to start maths from scratch. How to add fractions - simple guide.
From playlist Basic Numeracy
Stuff They Don't Want You to Know - Numerology
Do numbers have some sort of intangible, mystical properties? What exactly is numerology, and why do people put so much stock in it, even today? Listen in to learn more about superstition and the origins of numerology. http://howstuffworks.com http://facebook.com/ConspiracyStuff http://tw
From playlist Stuff They Don't Want You To Know
Simplest Maths - Basic Numeracy - Start from scratch maths. Fractions.
Very simple and clear reminder of fractions for those wanting to start from scratch with some maths knowledge. This video covers simple fractions only. No voiceover - just background music which you can mute if you want!
From playlist Basic Numeracy
Adding And Subtracting Fractions - Quick Method
Adding and subtracting fractions by cross-multiplying or the upside down picnic table!
From playlist QTS Numeracy Skills
Numeral vs Number | Introducing numeral systems for programming beginners
What's the difference between the number 12 and the numeral 12? A numeral system is any writing system that allows us to express numbers using symbols. When we express a number using symbols, the result is called a numeral. When we express a number using a numeral, numeral is said to enc
From playlist Data Science - Learn to code for beginners
Method of the Year 2011: Gene-editing nucleases - by Nature Video
Gene-editing nucleases can make targeted and precise changes to an organism's genome. This has opened up new possibilities for the study of gene function, as well as the treatment of disease. While gene-editing nucleases have been in use since the mid-1990s, in the form of zinc finger nucl
From playlist Method of the Year
How Cloning Happens Regularly In Nature
Episode 1 of 5 Check us out on iTunes! http://testtube.com/podcast Please Subscribe! http://testu.be/1FjtHn5 Some organisms have the innate ability to naturally clone themselves. Usually they can do it through one of three types of asexual reproduction: Binary fission, clonal frag
From playlist Cloning: How We Got Here and Should We Keep Going?
Math tutorial for simplifying complex fractions
👉 Learn how to simplify complex fractions. To simplify complex fractions having the addition/subtraction of more than one fractions in the numerator or/and in the denominator we first evaluate the numerator or/and the denominator separately to have one fraction in the numerator and in the
From playlist How to Simplify Complex Fractions with Monomials
Heterogeneous nucleation and TTT curves
0:00 introduction and single crystal growth homework 6:22 heterogeneous nucleation basics 8:48 surface energies and contact or wetting angle 18:25 cloud seeding in the UAE 20:11 comparing heterogeneous vs homogeneous nucleation in terms of critical radii and activation energy for nucleatio
From playlist Introduction to Materials Science and Engineering Fall 2018
Day 30 Heterogeneous nucleation
0:00 demo of supercooled water homogeneous nucleation 5:19 demo of diet coke mentos heterogeneous nucleation 6:40 comparison of homogeneous vs heterogeneous nucleation 12:21 reading quiz 21:15 n* and v_d the number of critical nuclei and attachment rates 29:30 heterogeneous nucleation deri
From playlist Introduction to Materials Science and Engineering Fall 2017
Competitive nucleation in nanoparticle clusters by Richard Bowles
Conference and School on Nucleation Aggregation and Growth URL: https://www.icts.res.in/program/NAG2010 DATES: Monday 26 July, 2010 - Friday 06 Aug, 2010 VENUE : Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru DESCRIPTION: Venue: Jawaharlal Nehru Centre for Advance
From playlist Conference and School on Nucleation Aggregation and Growth
Nucleation and growth of hard-sphere colloidal by David Weitz
Conference and School on Nucleation Aggregation and Growth URL: https://www.icts.res.in/program/NAG2010 DATES: Monday 26 July, 2010 - Friday 06 Aug, 2010 VENUE : Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru DESCRIPTION: Venue: Jawaharlal Nehru Centre for Advance
From playlist Conference and School on Nucleation Aggregation and Growth
If a second phase forms along an impurity or surface then we get heterogeneous nucleation. The critical nuclei and critical activation energy can be calculated just as before but accounting for the different volume to surface area ratio when we form spherical caps instead of spheres.
From playlist Materials Sciences 101 - Introduction to Materials Science & Engineering 2020
Heterogeneous nucleation and Avrami kinetics
0:00 crystal growth group project 5:02 nucleation rate 13:20 heterogeneous nucleation 28:20 transformation rate as a function of nucleation and growth rates. 33:24 TTT diagrams derived from inverse transformation rates (transformation times!) 39:00 microstructures of ingots upon cooling (d
From playlist Introduction to Materials Science & Engineering Fall 2019
Nucleation in protein folding by Jayant Udgaonkar
Conference and School on Nucleation Aggregation and Growth URL: https://www.icts.res.in/program/NAG2010 DATES: Monday 26 July, 2010 - Friday 06 Aug, 2010 VENUE : Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru DESCRIPTION: Venue: Jawaharlal Nehru Centre for Advance
From playlist Conference and School on Nucleation Aggregation and Growth
Local structure in nucleation of hard spheres in experiments and simulation by Paddy Royall
Conference and School on Nucleation Aggregation and Growth URL: https://www.icts.res.in/program/NAG2010 DATES: Monday 26 July, 2010 - Friday 06 Aug, 2010 VENUE : Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru DESCRIPTION: Venue: Jawaharlal Nehru Centre for Advance
From playlist Conference and School on Nucleation Aggregation and Growth
Crystal nucleation in supercooled liquid silicon by Srikanth Sastry
Conference and School on Nucleation Aggregation and Growth URL: https://www.icts.res.in/program/NAG2010 DATES: Monday 26 July, 2010 - Friday 06 Aug, 2010 VENUE : Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru DESCRIPTION: Venue: Jawaharlal Nehru Centre for Advance
From playlist Conference and School on Nucleation Aggregation and Growth
more work with fractions and arrays
From playlist Arithmetic and Pre-Algebra: Fractions, Decimals and Percents
Computational methods for the study of nucleation by Charusita Chakravarty
Conference and School on Nucleation Aggregation and Growth URL: https://www.icts.res.in/program/NAG2010 DATES: Monday 26 July, 2010 - Friday 06 Aug, 2010 VENUE : Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru DESCRIPTION: Venue: Jawaharlal Nehru Centre for Advance
From playlist Conference and School on Nucleation Aggregation and Growth