Research

ChatGPT is to replace not jobs but tedious tasksFor newspapers, ‘rewrite man’ will soon be goneFor other jobs, the ‘boring’ parts will be replaced by AI, but not the intellectual and challenging parts There has been over a year of hype for Large Language Models(LLMs). At the onset and initial round of hype, people outside…

Data Science can find correlation but not causalityIn stat, no causal but high correlation is called ‘Spurious regression’Hallucinations in LLMs are repsentative examples of spurious correlation Imagine two twin kids living in the neighborhood. One prefers to play outside day and night, while the other mostly sticks to his video games. After a year later,…

STEM majors are known for high dropoutsStudents need to have more information before jumping into STEMAdmission exam and tiered education can work, if designed right Over the years of study and teaching in the fields of STEM(Science, Technology, Engineering, and Mathematics), it is not uncommon to see students disappearing from the program. They often are…

People following AI hype are mostly completely misinformedAI/Data Science is still limited to statistical methodsHype can only attract ignorance As a professor of AI/Data Science, I from time to time receive emails from a bunch of hyped followers claiming what they call ‘recent AI’ can solve things that I have been pessimistic. They usually think…

Math in AI/Data Science is not really math, but a shortened version of English paragraph.In science, researchers often ask ‘plz speak in plain English’, a presentation that math is just to explain science in more scientific way. I liked math until high school, but it became an abomination during my college days. I had no…

Korean GDP growth was 6.4%/y for 50 years until 2022, but down to 2.1%/y in 2020s.Due to low birthrate down to 0.7, population is expected to 1/2 in 30 years.Policy fails due to nationwide preference to leftwing agenda.Few globally competent companies leave the country. Financial Times, on Apr 22, 2024, reported that South Korean economic…

Transition from column to matrix, matrix to tensor as a baseline of data feeding changed the scope of data science, but faster results in ‘better’, only when we apply the tool to the right place, with right approach. Back in early 2000s, when I first learned Matlab to solve basic regression problems, I was told…

When an expectation for future is shared, market reflects it immediatelyUS Fed hints to lower interest rates in March, which is already reflected in pricesBitcoin prices also rely on people’s belief on speculative demands The US Fed determines the base interest rate approximately once every 1.5 months, eight times a year. There is no reason…

Not the quality of teaching, but the way it operatesEasier admission and graduation bar applied to online degreesStudies show that higher quality attracts more passion from students Although much of the prejudice against online education courses has disappeared during the COVID-19 period, there is still a strong prejudice that online education is of lower quality…