In medical research, social science, and biology, a cross-sectional study (also known as a cross-sectional analysis, transverse study, prevalence study) is a type of observational study that analyzes data from a population, or a representative subset, at a specific point in time—that is, cross-sectional data. In economics, cross-sectional studies typically involve the use of cross-sectional regression, in order to sort out the existence and magnitude of causal effects of one independent variable upon a dependent variable of interest at a given point in time. They differ from time series analysis, in which the behavior of one or more economic aggregates is traced through time. In medical research, cross-sectional studies differ from case-control studies in that they aim to provide data on the entire population under study, whereas case-control studies typically include only individuals who have developed a specific condition and compare them with a matched sample, often a tiny minority, of the rest of the population. Cross-sectional studies are descriptive studies (neither longitudinal nor experimental). Unlike case-control studies, they can be used to describe, not only the odds ratio, but also absolute risks and relative risks from prevalences (sometimes called prevalence risk ratio, or PRR). They may be used to describe some feature of the population, such as prevalence of an illness, but cannot prove cause and effect. Longitudinal studies differ from both in making a series of observations more than once on members of the study population over a period of time. (Wikipedia).
What Exactly IS a Cross Section pt. 1: Cross Sectional Area
Today I I break the world record of longest video explaining cross sectional areas. I spend a good deal of time deriving and giving geometric arguments for the equations most textbooks would simply define for the cross sectional area if one has a single target, or sheet of targets.
From playlist What is a cross section?
What IS a Cross Section pt. 2: Differential Cross Sections in Particle Physics
Today I discuss how the interpretation of the cross section changes when we both turn on interactions and quantum mechanics. I discuss the importance of the differential cross section in particle physics with a couple examples, including how they can be used as evidence for the existence o
From playlist What is a cross section?
Cross product and area of parallelogram
How to compute area of parallelogram via cross products of vectors. Free ebook https://bookboon.com/en/introduction-to-vectors-ebook (updated link) Test your understanding via a short quiz http://goo.gl/forms/v8utjHDRT3
From playlist Introduction to Vectors
The vector cross-product is another form of vector multiplication and results in another vector. In this tutorial I show you a simple way of calculating the cross product of two vectors.
From playlist Introducing linear algebra
An introduction to the Cross Sections augmented reality application. It is intended as an educational tool to assist anyone who wants to engage in cross sectional geometry concepts in an interactive way. Since the app is currently being reviewed before release on the Play Store, please a
From playlist Summer of Math Exposition Youtube Videos
Multivariable Calculus: Cross Product
In this video we explore how to compute the cross product of two vectors using determinants.
From playlist Multivariable Calculus
Exploring CROSS SECTION Intuitively in GeoGebra 3D with Augmented Reality
Full GeoGebra Resource: https://www.geogebra.org/m/aavgbgnt #Math Ts: You and your Ss can create any freehand drawing in the coordinate plane and form a #3d surface by spinning this drawing about the xAxis (or any line)! Afterwards, we'll explore our construction in GeoGebra 3D with Augm
From playlist Building and Modeling with Augmented Reality
Flow classifications velocity distribution
Advanced Hydraulics by Dr. Suresh A Kartha,Department of Civil Engineering,IIT Guwahati.For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist IIT Guwahati: Advanced Hydraulics | CosmoLearning.org Civil Engineering
Unique Collider Signatures of a LRS Model with Minimal DM by Nilanjana Kumar
Candles of Darkness DATE :05 June TIME2017 to 09 June 2017 VENUE:Ramanujan Lecture Hall, ICTS Bangalore DARK MATTER AND THE SEARCH FOR PHYSICS BEYOND THE STANDARD MODEL "Darkness is your candle. Your boundaries are your quest."- Jalal-ud-din Rumi of Balkh (1207 - 1273) High energy Phys
From playlist Candles of Darkness
Marcel Vos, 9th FCC-ee Physics Workshop - Tuesday, 5 February 2015
Experimental studies Most recent progress from the working groups ttZ and ttgamma couplings at ILC Speaker: Marcel Vos (IFIC - centro mixto U. Valencia/CSIC, Valencia, Spain)
From playlist 9th FCC-ee Physics Workshop - 3-5 February 2015
Uniform flow in compound sections, concept of normal slope
Advanced Hydraulics by Dr. Suresh A Kartha,Department of Civil Engineering,IIT Guwahati.For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist IIT Guwahati: Advanced Hydraulics | CosmoLearning.org Civil Engineering
Statistics - 1.3.2 Observational Studies
In this second video of section 1.3, we will focus on the terminology, sampling methods and biases associated with an observational study. Power Point: https://bellevueuniversity-my.sharepoint.com/:p:/g/personal/kbrehm_bellevue_edu/EU653jDvbQ5FsvAu5PwXGs8BVRyeNxT_K72jksPthDZwkg?e=ZzVTCO
From playlist Applied Statistics (Entire Course)
THE BASICS: Drapery II-Gesture, Structure, Cross Contour Line
Marc draws diagrams to demonstrate ways to approach the beginning parts to a drapery or cloth drawing by seeing the overall rhythm, fluidity, gesture, then structure, and then seeing and drawing cross-contour diagram lines. This video leads to the next and final video on drapery.
From playlist THE BASICS
Infrared Structure of SU(N) Gauge Theory by V. Ravindran
DISCUSSION MEETING : CELEBRATING THE SCIENCE OF GIORGIO PARISI (ONLINE) ORGANIZERS : Chandan Dasgupta (ICTS-TIFR, India), Abhishek Dhar (ICTS-TIFR, India), Smarajit Karmakar (TIFR-Hyderabad, India) and Samriddhi Sankar Ray (ICTS-TIFR, India) DATE : 15 December 2021 to 17 December 2021 VE
From playlist Celebrating the Science of Giorgio Parisi (ONLINE)
Advanced Hydraulics by Dr. Suresh A Kartha,Department of Civil Engineering,IIT Guwahati.For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist IIT Guwahati: Advanced Hydraulics | CosmoLearning.org Civil Engineering
R - Introduction to Data Analytics (2.3 Flip)
Lecturer: Dr. Erin M. Buchanan Spring 2021 https://www.patreon.com/statisticsofdoom This video covers the final section on research methods and how we collect data to answer research questions. These videos are part of a series for a flipped graduated statistics course. The videos are
From playlist Graduate Statistics Flipped
Katalin Gyarmati: On the cross-combined measure of families of binary lattices and sequences
Abstract: The cross-combined measure (which is a natural extension of crosscorrelation measure) is introduced and important constructions of large families of binary lattices with nearly optimal cross-combined measures are presented. These results are important in the study of large famili
From playlist Women at CIRM