2,694 Works

PostgreSQL Backup Strategies

Magnus Hagander
Rumor has it all these other users and companies do this thing called "backup" on their database. And people keep saying it's a good idea. But what does it actually mean? In this talk we'll go through the different options we have for PostgreSQL backups, how to use them and some good tips and best practices for setting up a backup strategy that actually works when disaster strikes.

Corruption Detection and Containment

This will not be the most exciting talk, nor is there (currently) a simple answer to make hardware corruption problems go away. But it's important -- without being careful, it's easy for corruption to spread to replicas and backups, leaving data hopelessly lost. Or, a strange crash due to corruption could take many engineering resources to analyze. This talk is about kinds of hardware corruption that can and do happen, and the ways to detect...

Autoscaling PostgreSQL: a Case Study

Christophe Pettus
Managing Your Thundering Herd Amazon Web Services provides tremendous tools and techniques for scaling services up and down in response to planned or experienced load. However, too many systems are configured to use AWS as an equipment-rental facility, which wastes money and does not take advantage of AWS' unique properties. We'll talk about how to build systems that flex-scale using AWS tools. Among the topics we'll cover are: -- Designing your application and database for...

Lecture 18. Equilibrium in action.

Reginald Penner
UCI Chem 131C Thermodynamics and Chemical Dynamics (Spring 2012) Lec 18. Thermodynamics and Chemical Dynamics -- Equilibrium In Action -- Instructor: Reginald Penner, Ph.D. Description: In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how chemical reaction rates...

Lecture 16. The Chemical Potential.

Reginald Penner
UCI Chem 131C Thermodynamics and Chemical Dynamics (Spring 2012) Lec 16. Thermodynamics and Chemical Dynamics -- The Chemical Potential -- Instructor: Reginald Penner, Ph.D. Description: In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how chemical reaction rates...

Lecture 15. Getting to know the Gibbs Energy.

Reginald Penner
UCI Chem 131C Thermodynamics and Chemical Dynamics (Spring 2012) Lec 15. Thermodynamics and Chemical Dynamics -- Getting to Know The Gibbs Energy -- Instructor: Reginald Penner, Ph.D. Description: In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how...

Lecture 14. The Gibbs Energy.

Reginald Penner
UCI Chem 131C Thermodynamics and Chemical Dynamics (Spring 2012) Lec 14. Thermodynamics and Chemical Dynamics -- The Gibbs Energy -- Instructor: Reginald Penner, Ph.D. Description: In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how chemical reaction rates...

Lecture 13. The Carnot Cycle.

Reginald Penner
UCI Chem 131C Thermodynamics and Chemical Dynamics (Spring 2012) Lec 13. Thermodynamics and Chemical Dynamics -- The Carnot Cycle -- Instructor: Reginald Penner, Ph.D. Description: In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how chemical reaction rates...

Lecture 08. The First Law.

Reginald Penner
UCI Chem 131C Thermodynamics and Chemical Dynamics (Spring 2012) Lec 08. Thermodynamics and Chemical Dynamics -- The First Law -- Instructor: Reginald Penner, Ph.D. Description: In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how chemical reaction rates...

Lecture 25. Enzymes (second & final attempt)

Reginald Penner
UCI Chem 131C Thermodynamics and Chemical Dynamics (Spring 2012) Lec 25. Thermodynamics and Chemical Dynamics -- Enzymes Pt. II -- Instructor: Reginald Penner, Ph.D. Description: In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how chemical reaction rates...

Lecture 26. Chemical Kinetics Pt. 5.

Ramesh D. Arasasingham
UCI Chem 1C General Chemistry (Spring 2013) Lec 26. General Chemistry -- Chemical Kinetics -- Part 5 Instructor: Ramesh D. Arasasingham, Ph.D. Description: UCI Chem 1C is the third and final quarter of General Chemistry series and covers the following topics: equilibria, aqueous acid-base equilibria, solubility equilibria, oxidation reduction reactions, electrochemistry; kinetics; special topics. Index of Topics: 0:00:00 Experimentally Measured Rate Law Review 0:03:02 Factors that Affect a Rate 0:09:43 Reaction Profile 0:14:13 More on...

Lecture 16. Electrochemistry Pt. 1.

Ramesh D. Arasasingham
UCI Chem 1C General Chemistry (Spring 2013) Lec 16. General Chemistry -- Electrochemistry -- Part 1 Instructor: Ramesh D. Arasasingham, Ph.D. Description: UCI Chem 1C is the third and final quarter of General Chemistry series and covers the following topics: equilibria, aqueous acid-base equilibria, solubility equilibria, oxidation reduction reactions, electrochemistry; kinetics; special topics. Index of Topics: 0:00:00 Oxidation Reduction Reaction Review 0:02:55 Oxidation Numbers 0:04:50 Rules for Assigning Oxidation Numbers 0:10:13 Calculating Oxidation Number Example...

Lecture 12. Aqueous Equilibria Pt. 1.

Ramesh D. Arasasingham
UCI Chem 1C General Chemistry (Spring 2013) Lec 12. General Chemistry -- Aqueous Equilibria -- Part 1 Instructor: Ramesh D. Arasasingham, Ph.D. Description: UCI Chem 1C is the third and final quarter of General Chemistry series and covers the following topics: equilibria, aqueous acid-base equilibria, solubility equilibria, oxidation reduction reactions, electrochemistry; kinetics; special topics. Index of Topics: 0:00:00 Review on Strong Acid/Strong Base Titration 0:05:14 Weak Acid and Strong Base Titration 0:10:10 General Reaction 0:13:45...

Lecture 11. Buffered Solutions (Buffers) Pt. 2.

Ramesh D. Arasasingham
UCI Chem 1C General Chemistry (Spring 2013) Lec 11. General Chemistry -- Buffered Solutions -- Part 2 Instructor: Ramesh D. Arasasingham, Ph.D. Description: UCI Chem 1C is the third and final quarter of General Chemistry series and covers the following topics: equilibria, aqueous acid-base equilibria, solubility equilibria, oxidation reduction reactions, electrochemistry; kinetics; special topics. Index of Topics: 0:00:00 Titrations Review 0:10:14 Types of Titration 0:11:47 Strong Acid added to Strong Base Titration 0:32:35 Strong Base...

Lecture 10. Buffered Solutions (Buffers) Pt. 1.

Ramesh D. Arasasingham
UCI Chem 1C General Chemistry (Spring 2013) Lec 10. General Chemistry -- Buffered Solutions (Buffers) -- Part 1 Instructor: Ramesh D. Arasasingham, Ph.D. Description: UCI Chem 1C is the third and final quarter of General Chemistry series and covers the following topics: equilibria, aqueous acid-base equilibria, solubility equilibria, oxidation reduction reactions, electrochemistry; kinetics; special topics. Index of Topics: 0:05:18 Identifying Buffers 0:11:20 Weak Acid and Salt Example 0:17:23 What Makes this a Buffer? 0:22:23 Calculating...

Lecture 07. Acids and Bases. Pt. 4.

Ramesh D. Arasasingham
UCI Chem 1C General Chemistry (Spring 2013) Lec 07. General Chemistry -- Acids and Bases -- Part 4 Instructor: Ramesh D. Arasasingham, Ph.D. Description: UCI Chem 1C is the third and final quarter of General Chemistry series and covers the following topics: equilibria, aqueous acid-base equilibria, solubility equilibria, oxidation reduction reactions, electrochemistry; kinetics; special topics. Index of Topics: 0:00:00 Review of Carbonic Acid Example 0:15:43 Hydrolysis 0:18:10 Acid Base Properties of Salt 0:39:00 Calculating pH...

Lecture 01. Chemical Equilibrium Pt. 1.

Ramesh D. Arasasingham
UCI Chem 1C General Chemistry (Spring 2013) Lec 01. General Chemistry -- Chemical Equilibrium -- Part 1 View the complete course: http://ocw.uci.edu/courses/chem_1c_general_chemistry.html Instructor: Ramesh D. Arasasingham, Ph.D. License: Creative Commons BY-NC-SA Terms of Use: http://ocw.uci.edu/info. More courses at http://ocw.uci.edu Description: UCI Chem 1C is the third and final quarter of General Chemistry series and covers the following topics: equilibria, aqueous acid-base equilibria, solubility equilibria, oxidation reduction reactions, electrochemistry; kinetics; special topics. General Chemistry (Chem 1C)...

Lecture 02. Acids and Covalent Nomenclature.

Amanda Brindley
UCI Chem 1A General Chemistry (Winter 2013) Lec 02. General Chemistry -- Acids & Covalent Nomenclature/Mole Masses & Energy Instructor: Amanda Brindley, Ph.D. Description: Chem 1A is the first quarter of General Chemistry and covers the following topics: atomic structure; general properties of the elements; covalent, ionic, and metallic bonding; intermolecular forces; mass relationships. General Chemistry (Chem 1A) is part of OpenChem: http://ocw.uci.edu/openchem/ This video is part of a 23-lecture undergraduate-level course titled "General Chemistry"...

Lecture 05. Emission Spectra.

Amanda Brindley
UCI Chem 1A General Chemistry (Winter 2013) Lec 05. General Chemistry Emission Spectra Instructor: Amanda Brindley, Ph.D. Description: Chem 1A is the first quarter of General Chemistry and covers the following topics: atomic structure; general properties of the elements; covalent, ionic, and metallic bonding; intermolecular forces; mass relationships. Index of Topics: 0:00:20 Rydberg Equation: Derivation 0:01:22 Sign Conventions for Energy 0:03:52 Example of Rydberg Equations 0:05:19 Find Initial Energy Level of a Photon 0:09:11 Wavelength...

Lecture 03. Introduction to Quantum Mechanics.

Amanda Brindley
UCI Chem 1A General Chemistry (Winter 2013) Lec 03. General Chemistry Introduction to Quantum Mechanics Instructor: Amanda Brindley, Ph.D. Description: Chem 1A is the first quarter of General Chemistry and covers the following topics: atomic structure; general properties of the elements; covalent, ionic, and metallic bonding; intermolecular forces; mass relationships. Index of Topics: 0:00:17 Quantum Theory: Structure of an Atom 0:01:50 The Birth of Quantum Mechanics 0:03:17 Development of Atomic Models 0:05:09 Electromagnetic Radiation 0:06:11...

Lecture 21. Using HMBC to Help Solve Structures:

James Nowick
UCI Chem 203 Organic Spectroscopy (Fall 2011) Lec 21. Organic Spectroscopy -- Using HMBC to Help Solve Structures -- Putting the Pieces Together. Instructor: James Nowick, Ph.D. Description: This is a graduate course in organic spectroscopy, focusing on modern methods used in structure determination of organic molecules. Topics include mass spectrometry; ultraviolet, chiroptical, infrared, and nuclear magnetic resonance spectroscopy.

Lecture 12. Coupling Analysis in First-Order and Near-First-Order Systems

James Nowick
UCI Chem 203 Organic Spectroscopy (Fall 2011) Lec 12. Organic Spectroscopy -- Coupling Analysis in First-Order and Near-First Order Systems. Instructor: James Nowick, Ph.D. Description: This is a graduate course in organic spectroscopy, focusing on modern methods used in structure determination of organic molecules. Topics include mass spectrometry; ultraviolet, chiroptical, infrared, and nuclear magnetic resonance spectroscopy.

Lecture 04. Mass Spectrometry: Theory, Instrumentation, and Techniques

James Nowick
UCI Chem 203 Organic Spectroscopy (Fall 2011) Lec 04. Organic Spectroscopy -- Mass Spectroscopy -- Theory, Instrumentation, and Techniques. Instructor: James Nowick, Ph.D. Description: This is a graduate course in organic spectroscopy, focusing on modern methods used in structure determination of organic molecules. Topics include mass spectrometry; ultraviolet, chiroptical, infrared, and nuclear magnetic resonance spectroscopy.

Lecture 9. Chemical Shift. 1H NMR Chemical Shifts.

James Nowick
UCI Chem 203 Organic Spectroscopy (Fall 2011) Lec 09. Organic Spectroscopy -- Chemical Shift -- 1H NMR Chemical Shifts Instructor: James Nowick, Ph.D. Description: This is a graduate course in organic spectroscopy, focusing on modern methods used in structure determination of organic molecules. Topics include mass spectrometry; ultraviolet, chiroptical, infrared, and nuclear magnetic resonance spectroscopy.

Lecture 22. Aspects of COSY, HMQC, HMBC, and Related Experiments

James Nowick
UCI Chem 203 Organic Spectroscopy (Fall 2011) Lec 22. Organic Spectroscopy -- Aspects of COSY, HMQC, HMBC, and Related Experiments Instructor: James Nowick, Ph.D. Description: This is a graduate course in organic spectroscopy, focusing on modern methods used in structure determination of organic molecules. Topics include mass spectrometry; ultraviolet, chiroptical, infrared, and nuclear magnetic resonance spectroscopy.

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