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810 articles found
Statistics
An easy introduction to non-probability sampling in statistics, which selects samples based on the researcher's judgment or convenience, covering convenience, judgment (purposive),
Earth science
Floods are natural disasters that threaten countless lives and properties around the world every year. Climate change and rapid urbanization are increasing the frequency and intens
Physics
Why does a swing go higher and higher when you push it in rhythm? This article explains what resonance and natural frequency mean, how the swaying grows, its uses in musical instru
General knowledge
Occam’s Razor is the methodological guideline that, when several hypotheses explain the same phenomenon, we should favor the one that adds no unnecessary assumptions. This article
Library & information science
This time, on the subject of an important concept in cataloging within resource organization theory (information organization theory), authority, I would like to prepare some mater
Earth science
A volcanic winter is a drop in global temperatures lasting several years after a huge, sulfur-rich eruption spreads tiny sulfuric acid droplets through the stratosphere and blocks
General knowledge
The Nobel Prize is one of the world's most prestigious awards, presented annually to individuals or organizations that have achieved outstanding accomplishments in their respective
Food & nutrition
Two foods with the same 20 g of protein can differ in quality. This article explains the Protein Digestibility Corrected Amino Acid Score (PDCAAS): essential amino acids, the three
Economics
The influence of cryptocurrencies, particularly digital assets centered on Bitcoin and Ethereum, on global financial markets and economic structures is gradually expanding. These c
Food & nutrition
Protein denaturation is the unraveling of a protein’s carefully folded three-dimensional structure by heat, acid, or physical force, while its amino acid sequence stays intact. Thi
Chemistry
A colloid is a mixture in which particles too small to see are evenly dispersed and suspended in another substance. This article explains how colloids differ from solutions, the co
Economics
The Korean stock market is constantly changing in response to global economic trends and domestic political changes, and the pace and patterns of these changes are becoming increas
