Specific activity is the activity per unit mass of a radionuclide and is a physical property of that radionuclide. Activity is a quantity (for which the SI unit is the becquerel) related to radioactivity, and is defined as the number of radioactive transformations per second that occur in a particular radionuclide. The unit of activity is the becquerel (Bq), which is defined as one radioactive decay per second. The older, non-SI unit of activity is the curie (Ci), which is 3.7×1010 radioactive decay per second. Another unit of activity is the Rutherford, which is defined as 1×106 radioactive decay per second. Since the probability of radioactive decay for a given radionuclide within a set time interval is fixed (with some slight exceptions, see changing decay rates), the number of decays that occur in a given time of a given mass (and hence a specific number of atoms) of that radionuclide is also a fixed (ignoring statistical fluctuations). Thus, specific activity is defined as the activity per unit mass of a particular radionuclide. It is usually given in units of Bq/kg, but another commonly used unit of activity is the curie (Ci), allowing specific activity to be given the unit Ci/g. The amount of specific activity should not be confused with level of exposure to ionizing radiation and thus the exposure or absorbed dose. The absorbed dose is the quantity important in assessing the effects of ionizing radiation on humans. (Wikipedia).
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From playlist Your Career
You MUST Harness the ‘Power of Intention’ When Learning Anything
The power of intention refers to the ability of a person to direct their thoughts and energy towards a specific goal or outcome. This concept is often associated with positive thinking and the law of attraction, which suggests that individuals can manifest their desires through the power o
From playlist Life Hacks
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From playlist Career Examples
From playlist Classroom Activities for Active Learning
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From playlist Critical Thinking
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From playlist Critical Skills For Today
Teach Astronomy - Definition of Life
http://www.teachastronomy.com/ What is life? This simple question is amazingly difficult to answer. Even biologists cannot utterly agree on it. At one extreme, if we are too specific in our definition of life, we exclude the possibility that life might not be based, for example, on carb
From playlist 24. Chemistry and Context for Life
Tutorial on how to create a custom activity in GeoGebra.
From playlist Ideas for Teaching and Learning
Jason Ernst: "Deciphering the Non-coding Human Genome"
Computational Genomics Summer Institute 2016 "Deciphering the Non-coding Human Genome" Jason Ernst, UCLA Institute for Pure and Applied Mathematics, UCLA July 20, 2016 For more information: http://computationalgenomics.bioinformatics.ucla.edu/
From playlist Computational Genomics Summer Institute 2016
CERIAS Security: Access Control and Resiliency for WS BPEL 1/4
Clip 1/4 Speaker: Federica Paci · Post-doctoral research associate Business processes the next generation workflows- have attracted considerable research interest in the last fifteen years. More recently, several XML-based languages have been proposed for specifying and orchestrating bus
From playlist The CERIAS Security Seminars 2008
UiPath PDF Data Extraction | OCR Data Extraction | UiPath Tutorial | RPA Training | Edureka
** RPA Training: https://www.edureka.co/robotic-process-automation-training ** This session on UiPath PDF Data Extraction will cover all the concepts on how to extract data from PDFs using UiPath. Below are the topics covered in the video: 02:03 Extracting Large Texts 16:49 Extracting Sp
From playlist UiPath Tutorial for Beginners | Edureka
Patrick Haggard - Free Will: Where's the Problem?
Why is free will such a complex puzzle, enough to drive philosophers slightly mad? Free will probes consciousness, examines what it means to pick, choose, select, decide. But some say that 'free will' is just a trick of the brain. How to discern the key issues of free will, scientifically
From playlist Understanding Free Will - Closer To Truth - Core Topic
Presentation by Dr. Mark Ptashne at the Sidney Altman Symposium held on March 24, 2016 at the Greenberg Center, Yale University.
From playlist The Sidney Altman Symposium
WordPress 101 - Part 8: How to create Sidebar and Widgets areas
Live Development Session video where I applied Bootstrap styling: https://www.youtube.com/watch?v=OSYbTkzuyDg :: Support Me :: https://www.patreon.com/alecaddd http://www.alecaddd.com/support-me/ https://amzn.to/2Hcp5mo Eight lesson of the series WordPress 101 for Beginners Developers, H
From playlist WordPress 101 for Beginner Developers
🔥Project Management Full Course 2022 | Project Management Tutorial | Project Management| Simplilearn
🔥Post Graduate Program In Project Management: https://www.simplilearn.com/pgp-project-management-certification-training-course?utm_campaign=ProjectManagementFC30sept2022-pc9nvBsXsuM&utm_medium=DescriptionFirstFold&utm_source=youtube 🔥 PMP Certification Course: https://www.simplilearn.com/p
From playlist Simplilearn Live
How to lead students to an activity from a book
A simple way of decreasing the scroll of death and making your activities more accessible.
From playlist How to add a book in your course
3. Retinal Cell Fate Determination
Dr. Connie Cepko, the Bullard Professor of Genetics and Neuroscience at Harvard Medical School and an Investigator of the Howard Hughes Medical Institute, gives a great talk the diversity and number of cell types that one finds in the central nervous system of vertebrates which provokes ma
From playlist Wu Tsai Neurosciences Institute