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Marian-Andrei Rizoiu

Lecturer in Computer Science, University of Technology Sydney
Dr. Marian-Andrei Rizoiu is lecturer with the University of Technology Sydney, leading the Behavioral Data Science group, studying the dynamics of human attention in the online environment. His research has made several key contributions, particularly to the areas of online popularity prediction and online privacy. For the past several years, he has been developing theoretical models for online information diffusion, which can account for complex social phenomena, such as the rise and fall of online popularity, the spread of misinformation or the adoption of disruptive technologies. He approached questions such as "Why did X become popular, but not Y?" and "How can items be promoted?" with implications in advertising and marketing.

Marian-Andrei has also worked on detecting the evolution of privacy loss over time. His research has shown that privacy "leaks" over time and it identified the factors causing the loss: the individual's own actions and the environment. The conclusions were staggering: privacy continues to decrease even for users who retired from activity. Marian-Andrei published in the most selective venues of the field (such as WWW, WSDM, ICWSM or CIKM) and his work has received significant media attention, including from the Wikimedia Foundation for the work concerning the privacy of Wikipedia editors (which featured in the March 2016 Wikimedia Research Showcase). See more at http://www.rizoiu.eu

Meta-backed research finds exposure to ‘untrustworthy’ social media is rare. The fine print is less reassuring

Jul 30, 2026 07:43 am UTC| Insights & Views Business

How much of what you see on social media comes from sources that repeatedly post falsehoods? And if that content quietly vanished from your feed, would you believe anything different months later? A new study published...

Conspiracy theorist tactics show it’s too easy to get around Facebook’s content policies

Mar 25, 2024 05:11 am UTC| Insights & Views Technology

During the COVID pandemic, social media platforms were swarmed by far-right and anti-vaccination communities that spread dangerous conspiracy theories. These included the false claims that vaccines are a form of...

How AI can help choose your next career and stay ahead of automation

Aug 06, 2021 09:49 am UTC| Technology

The typical Australian will change careers five to seven times during their professional lifetime, by some estimates. And this is likely to increase as new technologies automate labour, production is moved abroad, and...

Coronavirus infecting Australian jobs: vacancy rates down since early February

Mar 23, 2020 12:05 pm UTC| Insights & Views

The economic impacts of the COVID-19 coronavirus will be enormous. Only blind optimism can deny the dark realities of the moment. Policy responses are escalating by the hour. Markets have plummeted to GFC levels. Food...

Can hiding likes make Facebook fairer and rein in fake news? The science says maybe

Oct 09, 2019 11:24 am UTC| Insights & Views Technology

This is the first article in a series looking at the attention economy and how online content gets in front of your eyeballs. You may have read about or already seen, depending on where you are the latest tweak to...

Economy

States Sue Trump: 25 Challenge "Unconstitutional" Tariffs on 60 Countries in High-Stakes Trade Clash

Twenty-five American states have challenged the Trump administration in the U.S. Court of International Trade, claiming the new tariffs on imports from 60 countries are unconstitutional and beyond presidential authority....

India Plans Tax Reforms to Boost Foreign Investment and Manufacturing

Indias government is preparing a new package of tax reforms designed to attract foreign investment and strengthen the countrys manufacturing sector, according to a Bloomberg News report citing people familiar with the...

Japan Economy Minister Downplays Inflation Risks Despite BOJ Warning

Japans Economy Minister Minoru Kiuchi said consumer price increases remain moderate despite ongoing geopolitical tensions in the Middle East, suggesting that inflationary pressures are still under control even as the Bank...

Asian Currencies Mixed as Yen Retreats, Traders Eye U.S.-Iran Talks and Fed Data

Asian currencies traded in mixed fashion on Tuesday as investors remained cautious over conflicting signals surrounding potential U.S.-Iran negotiations, while attention shifted to a busy week of U.S. economic data that...

Asian Stocks Rise as AI Optimism Returns, Australia Hits Record High Ahead of RBI Decision

Asian stock markets traded mostly higher on Tuesday as investors cautiously returned to technology stocks after Julys AI-driven selloff, while Australias strong gains helped offset weakness in Japan and Hong Kong. Improved...

Politics

Trump Urges Exxon, Chevron to Cut Gas Prices After Record Oil Profits

U.S. President Donald Trump criticized ExxonMobil and Chevron for earning massive profits from elevated oil prices, urging the energy giants to lower fuel costs and return some of their gains to American consumers....

Brown University President Christina Paxson to Step Down After Clashes With Trump Administration

Brown University President Christina Paxson announced on Monday that she will step down at the end of the current academic year, concluding a tenure marked by major challenges, including a high-profile dispute with...

US Supreme Court Lets $655.5 Million Judgment Against Palestinian Authorities Stand During Appeal

The U.S. Supreme Court declined to temporarily block a $655.5 million judgment against the Palestinian Authority (PA) and the Palestine Liberation Organization (PLO), allowing the damages award to remain in effect while...

North Korea Rejects U.S. Cyber Threat Claims, Slams Allied Warning

North Korea has dismissed recent accusations by the United States and its allies over alleged cyber activities, calling them politically motivated and aimed at justifying pressure on sovereign nations. According to state...

US State Department Plans to Close Five Foreign Missions in Global Diplomatic Restructuring

The U.S. State Department has informed Congress that it intends to close five overseas diplomatic missions as part of a broader effort to streamline Americas diplomatic network under the Trump administration, according to...

Science

Blue Origin New Glenn Explosion Could Delay Launch Operations Until 2028

Blue Origin is facing a significant setback after a dramatic explosion involving its New Glenn rocket severely damaged a launch pad at Cape Canaveral, Florida. According to NASA Administrator Jared Isaacman, repairs to the...

Blue Origin New Glenn Rocket Explodes During Launch Pad Test, Delaying Space Ambitions

Blue Origin suffered a major setback after its uncrewed New Glenn rocket exploded during a launch pad test in Florida on Thursday, raising new challenges for Jeff Bezos space company as it competes with Elon Musks SpaceX...

SpaceX Delays Starship V3 Launch Ahead of Potential Record IPO

SpaceX on Thursday postponed the highly anticipated launch of its 12th Starship rocket test from Texas after technical issues interrupted the final countdown. The company now plans to attempt the Starship V3 launch again...

Trump Administration Releases New UFO Files and Apollo Mission Records

The U.S. Defense Department has released dozens of previously classified UFO-related files following an order from President Donald Trump, sparking renewed debate over unidentified anomalous phenomena (UAP) and government...

China vs. NASA: The New Moon Race and What's at Stake by 2030

The space race is back and this time, its a direct competition between the United States and China for dominance on the lunar surface. NASAs Artemis II mission recently made history when four astronauts flew farther into...

Technology

Apple Restores Telegram to App Store After Content Policy Violation

Apple briefly removed Telegram from its App Store after a review found content that violated its App Store guidelines prohibiting child sexual abuse material (CSAM), the company confirmed on Monday. The messaging platform...

SK Hynix Bonus Dispute Deepens as Union Rejects Stock-Based Payout Proposal

SK Hynix and representatives of one of its South Korean labor unions resumed negotiations on Tuesday, holding a fifth round of talks over the semiconductor companys employee bonus structure at its Cheongju manufacturing...

Palantir Stock Soars as AI Demand Drives Strong Q2 Earnings and Higher 2026 Outlook

Palantir Technologies (NASDAQ: PLTR) surged in after-hours trading on Monday after reporting stronger-than-expected second-quarter earnings and raising its full-year 2026 guidance, fueled by accelerating demand for its...

Vast Eyes Hong Kong IPO as Chinese AI Unicorn Gains Momentum

Chinese artificial intelligence startup Vast is reportedly exploring a potential initial public offering (IPO) in Hong Kong, signaling growing investor interest in Chinas fast-expanding AI sector. According to a Bloomberg...

Telegram Restored on Apple App Store After Temporary Removal

Telegram has confirmed that its messaging app is once again available on Apples App Store after users briefly encountered an unexpected outage that removed the app listing. The company announced on Monday that the issue...