A quasi-experiment is an empirical interventional study used to estimate the causal impact of an intervention on target population without random assignment. Quasi-experimental research shares similarities with the traditional experimental design or randomized controlled trial, but it specifically lacks the element of random assignment to treatment or control. Instead, quasi-experimental designs typically allow the researcher to control the assignment to the treatment condition, but using some criterion other than random assignment (e.g., an eligibility cutoff mark). Quasi-experiments are subject to concerns regarding internal validity, because the treatment and control groups may not be comparable at baseline. In other words, it may not be possible to convincingly demonstrate a causal link between the treatment condition and observed outcomes. This is particularly true if there are confounding variables that cannot be controlled or accounted for. With random assignment, study participants have the same chance of being assigned to the intervention group or the comparison group. As a result, differences between groups on both observed and unobserved characteristics would be due to chance, rather than to a systematic factor related to treatment (e.g., illness severity). Randomization itself does not guarantee that groups will be equivalent at baseline. Any change in characteristics post-intervention is likely attributable to the intervention. (Wikipedia).
A short a cappella tribute to experimentalists. It is sung while performing three simple experiments with household items: Mentos dropped in diet Coke, a tea bag emptied and burned, and a ping pong ball floating in the air stream of a hair dryer.
From playlist Science Experiments!
Physics demonstrations Michelson Morley experiment (science)
Physics (la physique)
From playlist WAVES
Electromagnetic induction and Antigravity!!!
Physics demonstrations (la physique)!!!
From playlist physics
AWESOME "Human levitation" (science illusion)!!!
This experiment with a mirror shows you a very common illusion that magicians and illusionists often mislead us with. This is physics experiment for science project.
From playlist OPTICS
What is the difference between theoretical and experimental physics?
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From playlist Science Unplugged: Physics
AWESOME Physics experiment electron beam (science demonstrations)
Physics (la physique)(science experiments)!!! https://www.instagram.com/fisikilasfisikilas/
From playlist physics
AWESOME physics experiments Resonance pendulum (science demonstrations)
Physics (la physique)
From playlist physics
In this video i demonstrate photoelectric effect. I explain the effect and i show the Einstein equation! Enjoy!
From playlist ATOMIC PHYSICS
"AWESOME Antigravity double cone" (science experiments)
Physics (la physique). Explain why double cone goes up on inclaned plane (science experiments)
From playlist MECHANICS
Traditional sampling techniques (grid vs random vs sobol vs latin hypercube)
Welcome to video #1 of the Adaptive Experimentation series, presented by graduate student Sterling Baird @sterling-baird at the 18th IEEE Conference on eScience in Salt Lake City, UT (Oct 10-14, 2022). In this video, Sterling introduces the concept of adaptive experimentation and covers t
From playlist Optimization tutorial
Seminar In the Analysis and Methods of PDE (SIAM PDE): Michael Weinstein
Title: Effective Gaps for Time-Periodic Hamiltonians Modeling Floquet Materials Date: Thursday, February 2, 2023, 11:30 am EDT Speaker: Michael Weinstein, Columbia University Abstract: Floquet media are a type of material, in which time-periodic forcing is applied to alter the material’
From playlist Seminar In the Analysis and Methods of PDE (SIAM PDE)
Engineering MAE 91. Intro to Thermodynamics. Lecture 02.
UCI MAE 91: Introduction to Thermodynamics (Spring 2013). Lec 02. Intro to Thermodynamics -- Thermodynamic Properties -- View the complete course: http://ocw.uci.edu/courses/mae_91_introduction_to_thermal_dynamics.html Instructor: Roger Rangel, Ph.D. License: Creative Commons CC-BY-SA Ter
From playlist Engineering MAE 91. Intro to Thermodynamics
Quantum Phases of Matter XXII - Fractionalized metallic phases in the single band - Subir Sachdev
Joint Course with TIFR, IAS and ICTS Quantum Phases of Matter XXII - Fractionalized metallic phases in the single band Hubbard model - Subir Sachdev Speaker: Subir Sachdev Date: December 01, 2021 Table of Contents (powered by https://videoken.com) 0:00:00 Start 0:00:15 Introduction 0:0
From playlist The Quantum Phases of Matter by Subir Sachdev
Superdiffusive Hydrodynamics In Isotropic Quantum Spin Chains by Romain Vasseur
DISCUSSION MEETING : HYDRODYNAMICS AND FLUCTUATIONS - MICROSCOPIC APPROACHES IN CONDENSED MATTER SYSTEMS (ONLINE) ORGANIZERS : Abhishek Dhar (ICTS-TIFR, India), Keiji Saito (Keio University, Japan) and Tomohiro Sasamoto (Tokyo Institute of Technology, Japan) DATE : 06 September 2021 to 1
From playlist Hydrodynamics and fluctuations - microscopic approaches in condensed matter systems (ONLINE) 2021
Batch optimization of expensive functions (i.e. simulations)
This video is #5 in the Adaptive Experimentation series presented at the 18th IEEE Conference on eScience in Salt Lake City, UT (October 10-14, 2022). In this video, Sterling Baird presents how to optimize machine learning models using Ax in situations where experiments are expensive, such
From playlist Optimization tutorial
Quantum Transport, Lecture 13: Superconductivity
Instructor: Sergey Frolov, University of Pittsburgh, Spring 2013 http://sergeyfrolov.wordpress.com/ Summary: basics of superconductivity, Cooper pairing, energy gap, Andreev reflection. Quantum Transport course development supported in part by the National Science Foundation under grant DM
From playlist Quantum Transport
The Search for Natural Quasicrystals - Paul Steinhardt
Paul Steinhardt Center for Theoretical Science, Princeton University March 7, 2012 For more videos, visit http://video.ias.edu
From playlist Mathematics
Inversion and quantum oscillations in Kondo insulators" by Brijesh Kumar
DISCUSSION MEETING NOVEL PHASES OF QUANTUM MATTER ORGANIZERS: Adhip Agarwala, Sumilan Banerjee, Subhro Bhattacharjee, Abhishodh Prakash and Smitha Vishveshwara DATE: 23 December 2019 to 02 January 2020 VENUE: Ramanujan Lecture Hall, ICTS Bangalore Recent theoretical and experimental
From playlist Novel Phases of Quantum Matter 2019
Quantum fluids of light in semiconductor microcavities by Jacqueline Bloch
Open Quantum Systems DATE: 17 July 2017 to 04 August 2017 VENUE: Ramanujan Lecture Hall, ICTS Bangalore There have been major recent breakthroughs, both experimental and theoretical, in the field of Open Quantum Systems. The aim of this program is to bring together leaders in the Open Q
From playlist Open Quantum Systems
physics demonstrations Candle oscillator (science experiments)
Physics (la physique)(science experiments)
From playlist MECHANICS